1 /* -----------------------------------------------------------------------------
3 * (c) The GHC Team, 2000-2004
7 * ---------------------------------------------------------------------------*/
10 #include "PosixSource.h"
13 /* Linux needs _GNU_SOURCE to get RTLD_DEFAULT from <dlfcn.h> and
14 MREMAP_MAYMOVE from <sys/mman.h>.
23 #include "sm/Storage.h"
26 #include "LinkerInternals.h"
29 #include "StgPrimFloat.h" // for __int_encodeFloat etc.
32 #if !defined(mingw32_HOST_OS)
33 #include "posix/Signals.h"
36 // get protos for is*()
39 #ifdef HAVE_SYS_TYPES_H
40 #include <sys/types.h>
48 #ifdef HAVE_SYS_STAT_H
52 #if defined(HAVE_DLFCN_H)
56 #if defined(cygwin32_HOST_OS)
61 #ifdef HAVE_SYS_TIME_H
65 #include <sys/fcntl.h>
66 #include <sys/termios.h>
67 #include <sys/utime.h>
68 #include <sys/utsname.h>
72 #if defined(linux_HOST_OS) || defined(freebsd_HOST_OS) || defined(dragonfly_HOST_OS) || defined(netbsd_HOST_OS) || defined(openbsd_HOST_OS) || defined(darwin_HOST_OS)
83 #if defined(linux_HOST_OS) || defined(solaris2_HOST_OS) || defined(freebsd_HOST_OS) || defined(dragonfly_HOST_OS) || defined(netbsd_HOST_OS) || defined(openbsd_HOST_OS)
84 # define OBJFORMAT_ELF
85 # include <regex.h> // regex is already used by dlopen() so this is OK
86 // to use here without requiring an additional lib
87 #elif defined(cygwin32_HOST_OS) || defined (mingw32_HOST_OS)
88 # define OBJFORMAT_PEi386
91 #elif defined(darwin_HOST_OS)
92 # define OBJFORMAT_MACHO
94 # include <mach-o/loader.h>
95 # include <mach-o/nlist.h>
96 # include <mach-o/reloc.h>
97 #if !defined(HAVE_DLFCN_H)
98 # include <mach-o/dyld.h>
100 #if defined(powerpc_HOST_ARCH)
101 # include <mach-o/ppc/reloc.h>
103 #if defined(x86_64_HOST_ARCH)
104 # include <mach-o/x86_64/reloc.h>
108 #if defined(x86_64_HOST_ARCH) && defined(darwin_HOST_OS)
112 /* Hash table mapping symbol names to Symbol */
113 static /*Str*/HashTable *symhash;
115 /* Hash table mapping symbol names to StgStablePtr */
116 static /*Str*/HashTable *stablehash;
118 /* List of currently loaded objects */
119 ObjectCode *objects = NULL; /* initially empty */
121 static HsInt loadOc( ObjectCode* oc );
122 static ObjectCode* mkOc( char *path, char *image, int imageSize,
123 char *archiveMemberName
125 #ifdef darwin_HOST_OS
131 #if defined(OBJFORMAT_ELF)
132 static int ocVerifyImage_ELF ( ObjectCode* oc );
133 static int ocGetNames_ELF ( ObjectCode* oc );
134 static int ocResolve_ELF ( ObjectCode* oc );
135 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
136 static int ocAllocateSymbolExtras_ELF ( ObjectCode* oc );
138 #elif defined(OBJFORMAT_PEi386)
139 static int ocVerifyImage_PEi386 ( ObjectCode* oc );
140 static int ocGetNames_PEi386 ( ObjectCode* oc );
141 static int ocResolve_PEi386 ( ObjectCode* oc );
142 static void *lookupSymbolInDLLs ( unsigned char *lbl );
143 static void zapTrailingAtSign ( unsigned char *sym );
144 #elif defined(OBJFORMAT_MACHO)
145 static int ocVerifyImage_MachO ( ObjectCode* oc );
146 static int ocGetNames_MachO ( ObjectCode* oc );
147 static int ocResolve_MachO ( ObjectCode* oc );
150 static int machoGetMisalignment( FILE * );
152 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
153 static int ocAllocateSymbolExtras_MachO ( ObjectCode* oc );
155 #ifdef powerpc_HOST_ARCH
156 static void machoInitSymbolsWithoutUnderscore( void );
160 /* on x86_64 we have a problem with relocating symbol references in
161 * code that was compiled without -fPIC. By default, the small memory
162 * model is used, which assumes that symbol references can fit in a
163 * 32-bit slot. The system dynamic linker makes this work for
164 * references to shared libraries by either (a) allocating a jump
165 * table slot for code references, or (b) moving the symbol at load
166 * time (and copying its contents, if necessary) for data references.
168 * We unfortunately can't tell whether symbol references are to code
169 * or data. So for now we assume they are code (the vast majority
170 * are), and allocate jump-table slots. Unfortunately this will
171 * SILENTLY generate crashing code for data references. This hack is
172 * enabled by X86_64_ELF_NONPIC_HACK.
174 * One workaround is to use shared Haskell libraries. This is
175 * coming. Another workaround is to keep the static libraries but
176 * compile them with -fPIC, because that will generate PIC references
177 * to data which can be relocated. The PIC code is still too green to
178 * do this systematically, though.
181 * See thread http://www.haskell.org/pipermail/cvs-ghc/2007-September/038458.html
183 * Naming Scheme for Symbol Macros
185 * SymI_*: symbol is internal to the RTS. It resides in an object
186 * file/library that is statically.
187 * SymE_*: symbol is external to the RTS library. It might be linked
190 * Sym*_HasProto : the symbol prototype is imported in an include file
191 * or defined explicitly
192 * Sym*_NeedsProto: the symbol is undefined and we add a dummy
193 * default proto extern void sym(void);
195 #define X86_64_ELF_NONPIC_HACK 1
197 /* Link objects into the lower 2Gb on x86_64. GHC assumes the
198 * small memory model on this architecture (see gcc docs,
201 * MAP_32BIT not available on OpenBSD/amd64
203 #if defined(x86_64_HOST_ARCH) && defined(MAP_32BIT)
204 #define TRY_MAP_32BIT MAP_32BIT
206 #define TRY_MAP_32BIT 0
210 * Due to the small memory model (see above), on x86_64 we have to map
211 * all our non-PIC object files into the low 2Gb of the address space
212 * (why 2Gb and not 4Gb? Because all addresses must be reachable
213 * using a 32-bit signed PC-relative offset). On Linux we can do this
214 * using the MAP_32BIT flag to mmap(), however on other OSs
215 * (e.g. *BSD, see #2063, and also on Linux inside Xen, see #2512), we
216 * can't do this. So on these systems, we have to pick a base address
217 * in the low 2Gb of the address space and try to allocate memory from
220 * We pick a default address based on the OS, but also make this
221 * configurable via an RTS flag (+RTS -xm)
223 #if !defined(ALWAYS_PIC) && defined(x86_64_HOST_ARCH)
225 #if defined(MAP_32BIT)
226 // Try to use MAP_32BIT
227 #define MMAP_32BIT_BASE_DEFAULT 0
230 #define MMAP_32BIT_BASE_DEFAULT 0x40000000
233 static void *mmap_32bit_base = (void *)MMAP_32BIT_BASE_DEFAULT;
236 /* MAP_ANONYMOUS is MAP_ANON on some systems, e.g. OpenBSD */
237 #if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
238 #define MAP_ANONYMOUS MAP_ANON
241 /* -----------------------------------------------------------------------------
242 * Built-in symbols from the RTS
245 typedef struct _RtsSymbolVal {
250 #define Maybe_Stable_Names SymI_HasProto(stg_mkWeakzh) \
251 SymI_HasProto(stg_mkWeakForeignEnvzh) \
252 SymI_HasProto(stg_makeStableNamezh) \
253 SymI_HasProto(stg_finalizzeWeakzh)
255 #if !defined (mingw32_HOST_OS)
256 #define RTS_POSIX_ONLY_SYMBOLS \
257 SymI_HasProto(__hscore_get_saved_termios) \
258 SymI_HasProto(__hscore_set_saved_termios) \
259 SymI_HasProto(shutdownHaskellAndSignal) \
260 SymI_HasProto(lockFile) \
261 SymI_HasProto(unlockFile) \
262 SymI_HasProto(signal_handlers) \
263 SymI_HasProto(stg_sig_install) \
264 SymI_NeedsProto(nocldstop)
267 #if defined (cygwin32_HOST_OS)
268 #define RTS_MINGW_ONLY_SYMBOLS /**/
269 /* Don't have the ability to read import libs / archives, so
270 * we have to stupidly list a lot of what libcygwin.a
273 #define RTS_CYGWIN_ONLY_SYMBOLS \
274 SymI_HasProto(regfree) \
275 SymI_HasProto(regexec) \
276 SymI_HasProto(regerror) \
277 SymI_HasProto(regcomp) \
278 SymI_HasProto(__errno) \
279 SymI_HasProto(access) \
280 SymI_HasProto(chmod) \
281 SymI_HasProto(chdir) \
282 SymI_HasProto(close) \
283 SymI_HasProto(creat) \
285 SymI_HasProto(dup2) \
286 SymI_HasProto(fstat) \
287 SymI_HasProto(fcntl) \
288 SymI_HasProto(getcwd) \
289 SymI_HasProto(getenv) \
290 SymI_HasProto(lseek) \
291 SymI_HasProto(open) \
292 SymI_HasProto(fpathconf) \
293 SymI_HasProto(pathconf) \
294 SymI_HasProto(stat) \
296 SymI_HasProto(tanh) \
297 SymI_HasProto(cosh) \
298 SymI_HasProto(sinh) \
299 SymI_HasProto(atan) \
300 SymI_HasProto(acos) \
301 SymI_HasProto(asin) \
307 SymI_HasProto(sqrt) \
308 SymI_HasProto(localtime_r) \
309 SymI_HasProto(gmtime_r) \
310 SymI_HasProto(mktime) \
311 SymI_NeedsProto(_imp___tzname) \
312 SymI_HasProto(gettimeofday) \
313 SymI_HasProto(timezone) \
314 SymI_HasProto(tcgetattr) \
315 SymI_HasProto(tcsetattr) \
316 SymI_HasProto(memcpy) \
317 SymI_HasProto(memmove) \
318 SymI_HasProto(realloc) \
319 SymI_HasProto(malloc) \
320 SymI_HasProto(free) \
321 SymI_HasProto(fork) \
322 SymI_HasProto(lstat) \
323 SymI_HasProto(isatty) \
324 SymI_HasProto(mkdir) \
325 SymI_HasProto(opendir) \
326 SymI_HasProto(readdir) \
327 SymI_HasProto(rewinddir) \
328 SymI_HasProto(closedir) \
329 SymI_HasProto(link) \
330 SymI_HasProto(mkfifo) \
331 SymI_HasProto(pipe) \
332 SymI_HasProto(read) \
333 SymI_HasProto(rename) \
334 SymI_HasProto(rmdir) \
335 SymI_HasProto(select) \
336 SymI_HasProto(system) \
337 SymI_HasProto(write) \
338 SymI_HasProto(strcmp) \
339 SymI_HasProto(strcpy) \
340 SymI_HasProto(strncpy) \
341 SymI_HasProto(strerror) \
342 SymI_HasProto(sigaddset) \
343 SymI_HasProto(sigemptyset) \
344 SymI_HasProto(sigprocmask) \
345 SymI_HasProto(umask) \
346 SymI_HasProto(uname) \
347 SymI_HasProto(unlink) \
348 SymI_HasProto(utime) \
349 SymI_HasProto(waitpid)
351 #elif !defined(mingw32_HOST_OS)
352 #define RTS_MINGW_ONLY_SYMBOLS /**/
353 #define RTS_CYGWIN_ONLY_SYMBOLS /**/
354 #else /* defined(mingw32_HOST_OS) */
355 #define RTS_POSIX_ONLY_SYMBOLS /**/
356 #define RTS_CYGWIN_ONLY_SYMBOLS /**/
358 #if HAVE_GETTIMEOFDAY
359 #define RTS_MINGW_GETTIMEOFDAY_SYM SymI_NeedsProto(gettimeofday)
361 #define RTS_MINGW_GETTIMEOFDAY_SYM /**/
364 #if HAVE___MINGW_VFPRINTF
365 #define RTS___MINGW_VFPRINTF_SYM SymI_HasProto(__mingw_vfprintf)
367 #define RTS___MINGW_VFPRINTF_SYM /**/
370 /* These are statically linked from the mingw libraries into the ghc
371 executable, so we have to employ this hack. */
372 #define RTS_MINGW_ONLY_SYMBOLS \
373 SymI_HasProto(stg_asyncReadzh) \
374 SymI_HasProto(stg_asyncWritezh) \
375 SymI_HasProto(stg_asyncDoProczh) \
376 SymI_HasProto(memset) \
377 SymI_HasProto(inet_ntoa) \
378 SymI_HasProto(inet_addr) \
379 SymI_HasProto(htonl) \
380 SymI_HasProto(recvfrom) \
381 SymI_HasProto(listen) \
382 SymI_HasProto(bind) \
383 SymI_HasProto(shutdown) \
384 SymI_HasProto(connect) \
385 SymI_HasProto(htons) \
386 SymI_HasProto(ntohs) \
387 SymI_HasProto(getservbyname) \
388 SymI_HasProto(getservbyport) \
389 SymI_HasProto(getprotobynumber) \
390 SymI_HasProto(getprotobyname) \
391 SymI_HasProto(gethostbyname) \
392 SymI_HasProto(gethostbyaddr) \
393 SymI_HasProto(gethostname) \
394 SymI_HasProto(strcpy) \
395 SymI_HasProto(strncpy) \
396 SymI_HasProto(abort) \
397 SymI_NeedsProto(_alloca) \
398 SymI_HasProto(isxdigit) \
399 SymI_HasProto(isupper) \
400 SymI_HasProto(ispunct) \
401 SymI_HasProto(islower) \
402 SymI_HasProto(isspace) \
403 SymI_HasProto(isprint) \
404 SymI_HasProto(isdigit) \
405 SymI_HasProto(iscntrl) \
406 SymI_HasProto(isalpha) \
407 SymI_HasProto(isalnum) \
408 SymI_HasProto(isascii) \
409 RTS___MINGW_VFPRINTF_SYM \
410 SymI_HasProto(strcmp) \
411 SymI_HasProto(memmove) \
412 SymI_HasProto(realloc) \
413 SymI_HasProto(malloc) \
415 SymI_HasProto(tanh) \
416 SymI_HasProto(cosh) \
417 SymI_HasProto(sinh) \
418 SymI_HasProto(atan) \
419 SymI_HasProto(acos) \
420 SymI_HasProto(asin) \
426 SymI_HasProto(sqrt) \
427 SymI_HasProto(powf) \
428 SymI_HasProto(tanhf) \
429 SymI_HasProto(coshf) \
430 SymI_HasProto(sinhf) \
431 SymI_HasProto(atanf) \
432 SymI_HasProto(acosf) \
433 SymI_HasProto(asinf) \
434 SymI_HasProto(tanf) \
435 SymI_HasProto(cosf) \
436 SymI_HasProto(sinf) \
437 SymI_HasProto(expf) \
438 SymI_HasProto(logf) \
439 SymI_HasProto(sqrtf) \
441 SymI_HasProto(erfc) \
442 SymI_HasProto(erff) \
443 SymI_HasProto(erfcf) \
444 SymI_HasProto(memcpy) \
445 SymI_HasProto(rts_InstallConsoleEvent) \
446 SymI_HasProto(rts_ConsoleHandlerDone) \
447 SymI_NeedsProto(mktime) \
448 SymI_NeedsProto(_imp___timezone) \
449 SymI_NeedsProto(_imp___tzname) \
450 SymI_NeedsProto(_imp__tzname) \
451 SymI_NeedsProto(_imp___iob) \
452 SymI_NeedsProto(_imp___osver) \
453 SymI_NeedsProto(localtime) \
454 SymI_NeedsProto(gmtime) \
455 SymI_NeedsProto(opendir) \
456 SymI_NeedsProto(readdir) \
457 SymI_NeedsProto(rewinddir) \
458 SymI_NeedsProto(_imp____mb_cur_max) \
459 SymI_NeedsProto(_imp___pctype) \
460 SymI_NeedsProto(__chkstk) \
461 RTS_MINGW_GETTIMEOFDAY_SYM \
462 SymI_NeedsProto(closedir)
466 #if defined(darwin_HOST_OS) && HAVE_PRINTF_LDBLSTUB
467 #define RTS_DARWIN_ONLY_SYMBOLS \
468 SymI_NeedsProto(asprintf$LDBLStub) \
469 SymI_NeedsProto(err$LDBLStub) \
470 SymI_NeedsProto(errc$LDBLStub) \
471 SymI_NeedsProto(errx$LDBLStub) \
472 SymI_NeedsProto(fprintf$LDBLStub) \
473 SymI_NeedsProto(fscanf$LDBLStub) \
474 SymI_NeedsProto(fwprintf$LDBLStub) \
475 SymI_NeedsProto(fwscanf$LDBLStub) \
476 SymI_NeedsProto(printf$LDBLStub) \
477 SymI_NeedsProto(scanf$LDBLStub) \
478 SymI_NeedsProto(snprintf$LDBLStub) \
479 SymI_NeedsProto(sprintf$LDBLStub) \
480 SymI_NeedsProto(sscanf$LDBLStub) \
481 SymI_NeedsProto(strtold$LDBLStub) \
482 SymI_NeedsProto(swprintf$LDBLStub) \
483 SymI_NeedsProto(swscanf$LDBLStub) \
484 SymI_NeedsProto(syslog$LDBLStub) \
485 SymI_NeedsProto(vasprintf$LDBLStub) \
486 SymI_NeedsProto(verr$LDBLStub) \
487 SymI_NeedsProto(verrc$LDBLStub) \
488 SymI_NeedsProto(verrx$LDBLStub) \
489 SymI_NeedsProto(vfprintf$LDBLStub) \
490 SymI_NeedsProto(vfscanf$LDBLStub) \
491 SymI_NeedsProto(vfwprintf$LDBLStub) \
492 SymI_NeedsProto(vfwscanf$LDBLStub) \
493 SymI_NeedsProto(vprintf$LDBLStub) \
494 SymI_NeedsProto(vscanf$LDBLStub) \
495 SymI_NeedsProto(vsnprintf$LDBLStub) \
496 SymI_NeedsProto(vsprintf$LDBLStub) \
497 SymI_NeedsProto(vsscanf$LDBLStub) \
498 SymI_NeedsProto(vswprintf$LDBLStub) \
499 SymI_NeedsProto(vswscanf$LDBLStub) \
500 SymI_NeedsProto(vsyslog$LDBLStub) \
501 SymI_NeedsProto(vwarn$LDBLStub) \
502 SymI_NeedsProto(vwarnc$LDBLStub) \
503 SymI_NeedsProto(vwarnx$LDBLStub) \
504 SymI_NeedsProto(vwprintf$LDBLStub) \
505 SymI_NeedsProto(vwscanf$LDBLStub) \
506 SymI_NeedsProto(warn$LDBLStub) \
507 SymI_NeedsProto(warnc$LDBLStub) \
508 SymI_NeedsProto(warnx$LDBLStub) \
509 SymI_NeedsProto(wcstold$LDBLStub) \
510 SymI_NeedsProto(wprintf$LDBLStub) \
511 SymI_NeedsProto(wscanf$LDBLStub)
513 #define RTS_DARWIN_ONLY_SYMBOLS
517 # define MAIN_CAP_SYM SymI_HasProto(MainCapability)
519 # define MAIN_CAP_SYM
522 #if !defined(mingw32_HOST_OS)
523 #define RTS_USER_SIGNALS_SYMBOLS \
524 SymI_HasProto(setIOManagerControlFd) \
525 SymI_HasProto(setIOManagerWakeupFd) \
526 SymI_HasProto(ioManagerWakeup) \
527 SymI_HasProto(blockUserSignals) \
528 SymI_HasProto(unblockUserSignals)
530 #define RTS_USER_SIGNALS_SYMBOLS \
531 SymI_HasProto(ioManagerWakeup) \
532 SymI_HasProto(sendIOManagerEvent) \
533 SymI_HasProto(readIOManagerEvent) \
534 SymI_HasProto(getIOManagerEvent) \
535 SymI_HasProto(console_handler)
538 #define RTS_LIBFFI_SYMBOLS \
539 SymE_NeedsProto(ffi_prep_cif) \
540 SymE_NeedsProto(ffi_call) \
541 SymE_NeedsProto(ffi_type_void) \
542 SymE_NeedsProto(ffi_type_float) \
543 SymE_NeedsProto(ffi_type_double) \
544 SymE_NeedsProto(ffi_type_sint64) \
545 SymE_NeedsProto(ffi_type_uint64) \
546 SymE_NeedsProto(ffi_type_sint32) \
547 SymE_NeedsProto(ffi_type_uint32) \
548 SymE_NeedsProto(ffi_type_sint16) \
549 SymE_NeedsProto(ffi_type_uint16) \
550 SymE_NeedsProto(ffi_type_sint8) \
551 SymE_NeedsProto(ffi_type_uint8) \
552 SymE_NeedsProto(ffi_type_pointer)
554 #ifdef TABLES_NEXT_TO_CODE
555 #define RTS_RET_SYMBOLS /* nothing */
557 #define RTS_RET_SYMBOLS \
558 SymI_HasProto(stg_enter_ret) \
559 SymI_HasProto(stg_gc_fun_ret) \
560 SymI_HasProto(stg_ap_v_ret) \
561 SymI_HasProto(stg_ap_f_ret) \
562 SymI_HasProto(stg_ap_d_ret) \
563 SymI_HasProto(stg_ap_l_ret) \
564 SymI_HasProto(stg_ap_n_ret) \
565 SymI_HasProto(stg_ap_p_ret) \
566 SymI_HasProto(stg_ap_pv_ret) \
567 SymI_HasProto(stg_ap_pp_ret) \
568 SymI_HasProto(stg_ap_ppv_ret) \
569 SymI_HasProto(stg_ap_ppp_ret) \
570 SymI_HasProto(stg_ap_pppv_ret) \
571 SymI_HasProto(stg_ap_pppp_ret) \
572 SymI_HasProto(stg_ap_ppppp_ret) \
573 SymI_HasProto(stg_ap_pppppp_ret)
576 /* Modules compiled with -ticky may mention ticky counters */
577 /* This list should marry up with the one in $(TOP)/includes/stg/Ticky.h */
578 #define RTS_TICKY_SYMBOLS \
579 SymI_NeedsProto(ticky_entry_ctrs) \
580 SymI_NeedsProto(top_ct) \
582 SymI_HasProto(ENT_VIA_NODE_ctr) \
583 SymI_HasProto(ENT_STATIC_THK_ctr) \
584 SymI_HasProto(ENT_DYN_THK_ctr) \
585 SymI_HasProto(ENT_STATIC_FUN_DIRECT_ctr) \
586 SymI_HasProto(ENT_DYN_FUN_DIRECT_ctr) \
587 SymI_HasProto(ENT_STATIC_CON_ctr) \
588 SymI_HasProto(ENT_DYN_CON_ctr) \
589 SymI_HasProto(ENT_STATIC_IND_ctr) \
590 SymI_HasProto(ENT_DYN_IND_ctr) \
591 SymI_HasProto(ENT_PERM_IND_ctr) \
592 SymI_HasProto(ENT_PAP_ctr) \
593 SymI_HasProto(ENT_AP_ctr) \
594 SymI_HasProto(ENT_AP_STACK_ctr) \
595 SymI_HasProto(ENT_BH_ctr) \
596 SymI_HasProto(UNKNOWN_CALL_ctr) \
597 SymI_HasProto(SLOW_CALL_v_ctr) \
598 SymI_HasProto(SLOW_CALL_f_ctr) \
599 SymI_HasProto(SLOW_CALL_d_ctr) \
600 SymI_HasProto(SLOW_CALL_l_ctr) \
601 SymI_HasProto(SLOW_CALL_n_ctr) \
602 SymI_HasProto(SLOW_CALL_p_ctr) \
603 SymI_HasProto(SLOW_CALL_pv_ctr) \
604 SymI_HasProto(SLOW_CALL_pp_ctr) \
605 SymI_HasProto(SLOW_CALL_ppv_ctr) \
606 SymI_HasProto(SLOW_CALL_ppp_ctr) \
607 SymI_HasProto(SLOW_CALL_pppv_ctr) \
608 SymI_HasProto(SLOW_CALL_pppp_ctr) \
609 SymI_HasProto(SLOW_CALL_ppppp_ctr) \
610 SymI_HasProto(SLOW_CALL_pppppp_ctr) \
611 SymI_HasProto(SLOW_CALL_OTHER_ctr) \
612 SymI_HasProto(ticky_slow_call_unevald) \
613 SymI_HasProto(SLOW_CALL_ctr) \
614 SymI_HasProto(MULTI_CHUNK_SLOW_CALL_ctr) \
615 SymI_HasProto(MULTI_CHUNK_SLOW_CALL_CHUNKS_ctr) \
616 SymI_HasProto(KNOWN_CALL_ctr) \
617 SymI_HasProto(KNOWN_CALL_TOO_FEW_ARGS_ctr) \
618 SymI_HasProto(KNOWN_CALL_EXTRA_ARGS_ctr) \
619 SymI_HasProto(SLOW_CALL_FUN_TOO_FEW_ctr) \
620 SymI_HasProto(SLOW_CALL_FUN_CORRECT_ctr) \
621 SymI_HasProto(SLOW_CALL_FUN_TOO_MANY_ctr) \
622 SymI_HasProto(SLOW_CALL_PAP_TOO_FEW_ctr) \
623 SymI_HasProto(SLOW_CALL_PAP_CORRECT_ctr) \
624 SymI_HasProto(SLOW_CALL_PAP_TOO_MANY_ctr) \
625 SymI_HasProto(SLOW_CALL_UNEVALD_ctr) \
626 SymI_HasProto(UPDF_OMITTED_ctr) \
627 SymI_HasProto(UPDF_PUSHED_ctr) \
628 SymI_HasProto(CATCHF_PUSHED_ctr) \
629 SymI_HasProto(UPDF_RCC_PUSHED_ctr) \
630 SymI_HasProto(UPDF_RCC_OMITTED_ctr) \
631 SymI_HasProto(UPD_SQUEEZED_ctr) \
632 SymI_HasProto(UPD_CON_IN_NEW_ctr) \
633 SymI_HasProto(UPD_CON_IN_PLACE_ctr) \
634 SymI_HasProto(UPD_PAP_IN_NEW_ctr) \
635 SymI_HasProto(UPD_PAP_IN_PLACE_ctr) \
636 SymI_HasProto(ALLOC_HEAP_ctr) \
637 SymI_HasProto(ALLOC_HEAP_tot) \
638 SymI_HasProto(ALLOC_FUN_ctr) \
639 SymI_HasProto(ALLOC_FUN_adm) \
640 SymI_HasProto(ALLOC_FUN_gds) \
641 SymI_HasProto(ALLOC_FUN_slp) \
642 SymI_HasProto(UPD_NEW_IND_ctr) \
643 SymI_HasProto(UPD_NEW_PERM_IND_ctr) \
644 SymI_HasProto(UPD_OLD_IND_ctr) \
645 SymI_HasProto(UPD_OLD_PERM_IND_ctr) \
646 SymI_HasProto(UPD_BH_UPDATABLE_ctr) \
647 SymI_HasProto(UPD_BH_SINGLE_ENTRY_ctr) \
648 SymI_HasProto(UPD_CAF_BH_UPDATABLE_ctr) \
649 SymI_HasProto(UPD_CAF_BH_SINGLE_ENTRY_ctr) \
650 SymI_HasProto(GC_SEL_ABANDONED_ctr) \
651 SymI_HasProto(GC_SEL_MINOR_ctr) \
652 SymI_HasProto(GC_SEL_MAJOR_ctr) \
653 SymI_HasProto(GC_FAILED_PROMOTION_ctr) \
654 SymI_HasProto(ALLOC_UP_THK_ctr) \
655 SymI_HasProto(ALLOC_SE_THK_ctr) \
656 SymI_HasProto(ALLOC_THK_adm) \
657 SymI_HasProto(ALLOC_THK_gds) \
658 SymI_HasProto(ALLOC_THK_slp) \
659 SymI_HasProto(ALLOC_CON_ctr) \
660 SymI_HasProto(ALLOC_CON_adm) \
661 SymI_HasProto(ALLOC_CON_gds) \
662 SymI_HasProto(ALLOC_CON_slp) \
663 SymI_HasProto(ALLOC_TUP_ctr) \
664 SymI_HasProto(ALLOC_TUP_adm) \
665 SymI_HasProto(ALLOC_TUP_gds) \
666 SymI_HasProto(ALLOC_TUP_slp) \
667 SymI_HasProto(ALLOC_BH_ctr) \
668 SymI_HasProto(ALLOC_BH_adm) \
669 SymI_HasProto(ALLOC_BH_gds) \
670 SymI_HasProto(ALLOC_BH_slp) \
671 SymI_HasProto(ALLOC_PRIM_ctr) \
672 SymI_HasProto(ALLOC_PRIM_adm) \
673 SymI_HasProto(ALLOC_PRIM_gds) \
674 SymI_HasProto(ALLOC_PRIM_slp) \
675 SymI_HasProto(ALLOC_PAP_ctr) \
676 SymI_HasProto(ALLOC_PAP_adm) \
677 SymI_HasProto(ALLOC_PAP_gds) \
678 SymI_HasProto(ALLOC_PAP_slp) \
679 SymI_HasProto(ALLOC_TSO_ctr) \
680 SymI_HasProto(ALLOC_TSO_adm) \
681 SymI_HasProto(ALLOC_TSO_gds) \
682 SymI_HasProto(ALLOC_TSO_slp) \
683 SymI_HasProto(RET_NEW_ctr) \
684 SymI_HasProto(RET_OLD_ctr) \
685 SymI_HasProto(RET_UNBOXED_TUP_ctr) \
686 SymI_HasProto(RET_SEMI_loads_avoided)
689 // On most platforms, the garbage collector rewrites references
690 // to small integer and char objects to a set of common, shared ones.
692 // We don't do this when compiling to Windows DLLs at the moment because
693 // it doesn't support cross package data references well.
695 #if defined(__PIC__) && defined(mingw32_HOST_OS)
696 #define RTS_INTCHAR_SYMBOLS
698 #define RTS_INTCHAR_SYMBOLS \
699 SymI_HasProto(stg_CHARLIKE_closure) \
700 SymI_HasProto(stg_INTLIKE_closure)
704 #define RTS_SYMBOLS \
707 SymI_HasProto(StgReturn) \
708 SymI_HasProto(stg_enter_info) \
709 SymI_HasProto(stg_gc_void_info) \
710 SymI_HasProto(__stg_gc_enter_1) \
711 SymI_HasProto(stg_gc_noregs) \
712 SymI_HasProto(stg_gc_unpt_r1_info) \
713 SymI_HasProto(stg_gc_unpt_r1) \
714 SymI_HasProto(stg_gc_unbx_r1_info) \
715 SymI_HasProto(stg_gc_unbx_r1) \
716 SymI_HasProto(stg_gc_f1_info) \
717 SymI_HasProto(stg_gc_f1) \
718 SymI_HasProto(stg_gc_d1_info) \
719 SymI_HasProto(stg_gc_d1) \
720 SymI_HasProto(stg_gc_l1_info) \
721 SymI_HasProto(stg_gc_l1) \
722 SymI_HasProto(__stg_gc_fun) \
723 SymI_HasProto(stg_gc_fun_info) \
724 SymI_HasProto(stg_gc_gen) \
725 SymI_HasProto(stg_gc_gen_info) \
726 SymI_HasProto(stg_gc_gen_hp) \
727 SymI_HasProto(stg_gc_ut) \
728 SymI_HasProto(stg_gen_yield) \
729 SymI_HasProto(stg_yield_noregs) \
730 SymI_HasProto(stg_yield_to_interpreter) \
731 SymI_HasProto(stg_gen_block) \
732 SymI_HasProto(stg_block_noregs) \
733 SymI_HasProto(stg_block_1) \
734 SymI_HasProto(stg_block_takemvar) \
735 SymI_HasProto(stg_block_putmvar) \
737 SymI_HasProto(MallocFailHook) \
738 SymI_HasProto(OnExitHook) \
739 SymI_HasProto(OutOfHeapHook) \
740 SymI_HasProto(StackOverflowHook) \
741 SymI_HasProto(addDLL) \
742 SymI_HasProto(__int_encodeDouble) \
743 SymI_HasProto(__word_encodeDouble) \
744 SymI_HasProto(__2Int_encodeDouble) \
745 SymI_HasProto(__int_encodeFloat) \
746 SymI_HasProto(__word_encodeFloat) \
747 SymI_HasProto(stg_atomicallyzh) \
748 SymI_HasProto(barf) \
749 SymI_HasProto(debugBelch) \
750 SymI_HasProto(errorBelch) \
751 SymI_HasProto(sysErrorBelch) \
752 SymI_HasProto(stg_getMaskingStatezh) \
753 SymI_HasProto(stg_maskAsyncExceptionszh) \
754 SymI_HasProto(stg_maskUninterruptiblezh) \
755 SymI_HasProto(stg_catchzh) \
756 SymI_HasProto(stg_catchRetryzh) \
757 SymI_HasProto(stg_catchSTMzh) \
758 SymI_HasProto(stg_checkzh) \
759 SymI_HasProto(closure_flags) \
760 SymI_HasProto(cmp_thread) \
761 SymI_HasProto(createAdjustor) \
762 SymI_HasProto(stg_decodeDoublezu2Intzh) \
763 SymI_HasProto(stg_decodeFloatzuIntzh) \
764 SymI_HasProto(defaultsHook) \
765 SymI_HasProto(stg_delayzh) \
766 SymI_HasProto(stg_deRefWeakzh) \
767 SymI_HasProto(stg_deRefStablePtrzh) \
768 SymI_HasProto(dirty_MUT_VAR) \
769 SymI_HasProto(stg_forkzh) \
770 SymI_HasProto(stg_forkOnzh) \
771 SymI_HasProto(forkProcess) \
772 SymI_HasProto(forkOS_createThread) \
773 SymI_HasProto(freeHaskellFunctionPtr) \
774 SymI_HasProto(getOrSetTypeableStore) \
775 SymI_HasProto(getOrSetGHCConcSignalSignalHandlerStore) \
776 SymI_HasProto(getOrSetGHCConcWindowsPendingDelaysStore) \
777 SymI_HasProto(getOrSetGHCConcWindowsIOManagerThreadStore) \
778 SymI_HasProto(getOrSetGHCConcWindowsProddingStore) \
779 SymI_HasProto(getOrSetSystemEventThreadEventManagerStore) \
780 SymI_HasProto(getOrSetSystemEventThreadIOManagerThreadStore) \
781 SymI_HasProto(genSymZh) \
782 SymI_HasProto(genericRaise) \
783 SymI_HasProto(getProgArgv) \
784 SymI_HasProto(getFullProgArgv) \
785 SymI_HasProto(getStablePtr) \
786 SymI_HasProto(hs_init) \
787 SymI_HasProto(hs_exit) \
788 SymI_HasProto(hs_set_argv) \
789 SymI_HasProto(hs_add_root) \
790 SymI_HasProto(hs_perform_gc) \
791 SymI_HasProto(hs_free_stable_ptr) \
792 SymI_HasProto(hs_free_fun_ptr) \
793 SymI_HasProto(hs_hpc_rootModule) \
794 SymI_HasProto(hs_hpc_module) \
795 SymI_HasProto(initLinker) \
796 SymI_HasProto(stg_unpackClosurezh) \
797 SymI_HasProto(stg_getApStackValzh) \
798 SymI_HasProto(stg_getSparkzh) \
799 SymI_HasProto(stg_numSparkszh) \
800 SymI_HasProto(stg_isCurrentThreadBoundzh) \
801 SymI_HasProto(stg_isEmptyMVarzh) \
802 SymI_HasProto(stg_killThreadzh) \
803 SymI_HasProto(loadArchive) \
804 SymI_HasProto(loadObj) \
805 SymI_HasProto(insertStableSymbol) \
806 SymI_HasProto(insertSymbol) \
807 SymI_HasProto(lookupSymbol) \
808 SymI_HasProto(stg_makeStablePtrzh) \
809 SymI_HasProto(stg_mkApUpd0zh) \
810 SymI_HasProto(stg_myThreadIdzh) \
811 SymI_HasProto(stg_labelThreadzh) \
812 SymI_HasProto(stg_newArrayzh) \
813 SymI_HasProto(stg_newBCOzh) \
814 SymI_HasProto(stg_newByteArrayzh) \
815 SymI_HasProto_redirect(newCAF, newDynCAF) \
816 SymI_HasProto(stg_newMVarzh) \
817 SymI_HasProto(stg_newMutVarzh) \
818 SymI_HasProto(stg_newTVarzh) \
819 SymI_HasProto(stg_noDuplicatezh) \
820 SymI_HasProto(stg_atomicModifyMutVarzh) \
821 SymI_HasProto(stg_newPinnedByteArrayzh) \
822 SymI_HasProto(stg_newAlignedPinnedByteArrayzh) \
823 SymI_HasProto(newSpark) \
824 SymI_HasProto(performGC) \
825 SymI_HasProto(performMajorGC) \
826 SymI_HasProto(prog_argc) \
827 SymI_HasProto(prog_argv) \
828 SymI_HasProto(stg_putMVarzh) \
829 SymI_HasProto(stg_raisezh) \
830 SymI_HasProto(stg_raiseIOzh) \
831 SymI_HasProto(stg_readTVarzh) \
832 SymI_HasProto(stg_readTVarIOzh) \
833 SymI_HasProto(resumeThread) \
834 SymI_HasProto(resolveObjs) \
835 SymI_HasProto(stg_retryzh) \
836 SymI_HasProto(rts_apply) \
837 SymI_HasProto(rts_checkSchedStatus) \
838 SymI_HasProto(rts_eval) \
839 SymI_HasProto(rts_evalIO) \
840 SymI_HasProto(rts_evalLazyIO) \
841 SymI_HasProto(rts_evalStableIO) \
842 SymI_HasProto(rts_eval_) \
843 SymI_HasProto(rts_getBool) \
844 SymI_HasProto(rts_getChar) \
845 SymI_HasProto(rts_getDouble) \
846 SymI_HasProto(rts_getFloat) \
847 SymI_HasProto(rts_getInt) \
848 SymI_HasProto(rts_getInt8) \
849 SymI_HasProto(rts_getInt16) \
850 SymI_HasProto(rts_getInt32) \
851 SymI_HasProto(rts_getInt64) \
852 SymI_HasProto(rts_getPtr) \
853 SymI_HasProto(rts_getFunPtr) \
854 SymI_HasProto(rts_getStablePtr) \
855 SymI_HasProto(rts_getThreadId) \
856 SymI_HasProto(rts_getWord) \
857 SymI_HasProto(rts_getWord8) \
858 SymI_HasProto(rts_getWord16) \
859 SymI_HasProto(rts_getWord32) \
860 SymI_HasProto(rts_getWord64) \
861 SymI_HasProto(rts_lock) \
862 SymI_HasProto(rts_mkBool) \
863 SymI_HasProto(rts_mkChar) \
864 SymI_HasProto(rts_mkDouble) \
865 SymI_HasProto(rts_mkFloat) \
866 SymI_HasProto(rts_mkInt) \
867 SymI_HasProto(rts_mkInt8) \
868 SymI_HasProto(rts_mkInt16) \
869 SymI_HasProto(rts_mkInt32) \
870 SymI_HasProto(rts_mkInt64) \
871 SymI_HasProto(rts_mkPtr) \
872 SymI_HasProto(rts_mkFunPtr) \
873 SymI_HasProto(rts_mkStablePtr) \
874 SymI_HasProto(rts_mkString) \
875 SymI_HasProto(rts_mkWord) \
876 SymI_HasProto(rts_mkWord8) \
877 SymI_HasProto(rts_mkWord16) \
878 SymI_HasProto(rts_mkWord32) \
879 SymI_HasProto(rts_mkWord64) \
880 SymI_HasProto(rts_unlock) \
881 SymI_HasProto(rts_unsafeGetMyCapability) \
882 SymI_HasProto(rtsSupportsBoundThreads) \
883 SymI_HasProto(rts_isProfiled) \
884 SymI_HasProto(setProgArgv) \
885 SymI_HasProto(startupHaskell) \
886 SymI_HasProto(shutdownHaskell) \
887 SymI_HasProto(shutdownHaskellAndExit) \
888 SymI_HasProto(stable_ptr_table) \
889 SymI_HasProto(stackOverflow) \
890 SymI_HasProto(stg_CAF_BLACKHOLE_info) \
891 SymI_HasProto(stg_BLACKHOLE_info) \
892 SymI_HasProto(__stg_EAGER_BLACKHOLE_info) \
893 SymI_HasProto(stg_BLOCKING_QUEUE_CLEAN_info) \
894 SymI_HasProto(stg_BLOCKING_QUEUE_DIRTY_info) \
895 SymI_HasProto(startTimer) \
896 SymI_HasProto(stg_MVAR_CLEAN_info) \
897 SymI_HasProto(stg_MVAR_DIRTY_info) \
898 SymI_HasProto(stg_IND_STATIC_info) \
899 SymI_HasProto(stg_ARR_WORDS_info) \
900 SymI_HasProto(stg_MUT_ARR_PTRS_DIRTY_info) \
901 SymI_HasProto(stg_MUT_ARR_PTRS_FROZEN_info) \
902 SymI_HasProto(stg_MUT_ARR_PTRS_FROZEN0_info) \
903 SymI_HasProto(stg_WEAK_info) \
904 SymI_HasProto(stg_ap_v_info) \
905 SymI_HasProto(stg_ap_f_info) \
906 SymI_HasProto(stg_ap_d_info) \
907 SymI_HasProto(stg_ap_l_info) \
908 SymI_HasProto(stg_ap_n_info) \
909 SymI_HasProto(stg_ap_p_info) \
910 SymI_HasProto(stg_ap_pv_info) \
911 SymI_HasProto(stg_ap_pp_info) \
912 SymI_HasProto(stg_ap_ppv_info) \
913 SymI_HasProto(stg_ap_ppp_info) \
914 SymI_HasProto(stg_ap_pppv_info) \
915 SymI_HasProto(stg_ap_pppp_info) \
916 SymI_HasProto(stg_ap_ppppp_info) \
917 SymI_HasProto(stg_ap_pppppp_info) \
918 SymI_HasProto(stg_ap_0_fast) \
919 SymI_HasProto(stg_ap_v_fast) \
920 SymI_HasProto(stg_ap_f_fast) \
921 SymI_HasProto(stg_ap_d_fast) \
922 SymI_HasProto(stg_ap_l_fast) \
923 SymI_HasProto(stg_ap_n_fast) \
924 SymI_HasProto(stg_ap_p_fast) \
925 SymI_HasProto(stg_ap_pv_fast) \
926 SymI_HasProto(stg_ap_pp_fast) \
927 SymI_HasProto(stg_ap_ppv_fast) \
928 SymI_HasProto(stg_ap_ppp_fast) \
929 SymI_HasProto(stg_ap_pppv_fast) \
930 SymI_HasProto(stg_ap_pppp_fast) \
931 SymI_HasProto(stg_ap_ppppp_fast) \
932 SymI_HasProto(stg_ap_pppppp_fast) \
933 SymI_HasProto(stg_ap_1_upd_info) \
934 SymI_HasProto(stg_ap_2_upd_info) \
935 SymI_HasProto(stg_ap_3_upd_info) \
936 SymI_HasProto(stg_ap_4_upd_info) \
937 SymI_HasProto(stg_ap_5_upd_info) \
938 SymI_HasProto(stg_ap_6_upd_info) \
939 SymI_HasProto(stg_ap_7_upd_info) \
940 SymI_HasProto(stg_exit) \
941 SymI_HasProto(stg_sel_0_upd_info) \
942 SymI_HasProto(stg_sel_10_upd_info) \
943 SymI_HasProto(stg_sel_11_upd_info) \
944 SymI_HasProto(stg_sel_12_upd_info) \
945 SymI_HasProto(stg_sel_13_upd_info) \
946 SymI_HasProto(stg_sel_14_upd_info) \
947 SymI_HasProto(stg_sel_15_upd_info) \
948 SymI_HasProto(stg_sel_1_upd_info) \
949 SymI_HasProto(stg_sel_2_upd_info) \
950 SymI_HasProto(stg_sel_3_upd_info) \
951 SymI_HasProto(stg_sel_4_upd_info) \
952 SymI_HasProto(stg_sel_5_upd_info) \
953 SymI_HasProto(stg_sel_6_upd_info) \
954 SymI_HasProto(stg_sel_7_upd_info) \
955 SymI_HasProto(stg_sel_8_upd_info) \
956 SymI_HasProto(stg_sel_9_upd_info) \
957 SymI_HasProto(stg_upd_frame_info) \
958 SymI_HasProto(stg_bh_upd_frame_info) \
959 SymI_HasProto(suspendThread) \
960 SymI_HasProto(stg_takeMVarzh) \
961 SymI_HasProto(stg_threadStatuszh) \
962 SymI_HasProto(stg_tryPutMVarzh) \
963 SymI_HasProto(stg_tryTakeMVarzh) \
964 SymI_HasProto(stg_unmaskAsyncExceptionszh) \
965 SymI_HasProto(unloadObj) \
966 SymI_HasProto(stg_unsafeThawArrayzh) \
967 SymI_HasProto(stg_waitReadzh) \
968 SymI_HasProto(stg_waitWritezh) \
969 SymI_HasProto(stg_writeTVarzh) \
970 SymI_HasProto(stg_yieldzh) \
971 SymI_NeedsProto(stg_interp_constr_entry) \
972 SymI_HasProto(stg_arg_bitmaps) \
973 SymI_HasProto(alloc_blocks_lim) \
975 SymI_HasProto(allocate) \
976 SymI_HasProto(allocateExec) \
977 SymI_HasProto(freeExec) \
978 SymI_HasProto(getAllocations) \
979 SymI_HasProto(revertCAFs) \
980 SymI_HasProto(RtsFlags) \
981 SymI_NeedsProto(rts_breakpoint_io_action) \
982 SymI_NeedsProto(rts_stop_next_breakpoint) \
983 SymI_NeedsProto(rts_stop_on_exception) \
984 SymI_HasProto(stopTimer) \
985 SymI_HasProto(n_capabilities) \
986 SymI_HasProto(stg_traceCcszh) \
987 SymI_HasProto(stg_traceEventzh) \
988 RTS_USER_SIGNALS_SYMBOLS \
992 // 64-bit support functions in libgcc.a
993 #if defined(__GNUC__) && SIZEOF_VOID_P <= 4
994 #define RTS_LIBGCC_SYMBOLS \
995 SymI_NeedsProto(__divdi3) \
996 SymI_NeedsProto(__udivdi3) \
997 SymI_NeedsProto(__moddi3) \
998 SymI_NeedsProto(__umoddi3) \
999 SymI_NeedsProto(__muldi3) \
1000 SymI_NeedsProto(__ashldi3) \
1001 SymI_NeedsProto(__ashrdi3) \
1002 SymI_NeedsProto(__lshrdi3)
1004 #define RTS_LIBGCC_SYMBOLS
1007 #if defined(darwin_HOST_OS) && defined(powerpc_HOST_ARCH)
1008 // Symbols that don't have a leading underscore
1009 // on Mac OS X. They have to receive special treatment,
1010 // see machoInitSymbolsWithoutUnderscore()
1011 #define RTS_MACHO_NOUNDERLINE_SYMBOLS \
1012 SymI_NeedsProto(saveFP) \
1013 SymI_NeedsProto(restFP)
1016 /* entirely bogus claims about types of these symbols */
1017 #define SymI_NeedsProto(vvv) extern void vvv(void);
1018 #if defined(__PIC__) && defined(mingw32_HOST_OS)
1019 #define SymE_HasProto(vvv) SymE_HasProto(vvv);
1020 #define SymE_NeedsProto(vvv) extern void _imp__ ## vvv (void);
1022 #define SymE_NeedsProto(vvv) SymI_NeedsProto(vvv);
1023 #define SymE_HasProto(vvv) SymI_HasProto(vvv)
1025 #define SymI_HasProto(vvv) /**/
1026 #define SymI_HasProto_redirect(vvv,xxx) /**/
1029 RTS_POSIX_ONLY_SYMBOLS
1030 RTS_MINGW_ONLY_SYMBOLS
1031 RTS_CYGWIN_ONLY_SYMBOLS
1032 RTS_DARWIN_ONLY_SYMBOLS
1035 #undef SymI_NeedsProto
1036 #undef SymI_HasProto
1037 #undef SymI_HasProto_redirect
1038 #undef SymE_HasProto
1039 #undef SymE_NeedsProto
1041 #ifdef LEADING_UNDERSCORE
1042 #define MAYBE_LEADING_UNDERSCORE_STR(s) ("_" s)
1044 #define MAYBE_LEADING_UNDERSCORE_STR(s) (s)
1047 #define SymI_HasProto(vvv) { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
1049 #define SymE_HasProto(vvv) { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
1050 (void*)DLL_IMPORT_DATA_REF(vvv) },
1052 #define SymI_NeedsProto(vvv) SymI_HasProto(vvv)
1053 #define SymE_NeedsProto(vvv) SymE_HasProto(vvv)
1055 // SymI_HasProto_redirect allows us to redirect references to one symbol to
1056 // another symbol. See newCAF/newDynCAF for an example.
1057 #define SymI_HasProto_redirect(vvv,xxx) \
1058 { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
1061 static RtsSymbolVal rtsSyms[] = {
1064 RTS_POSIX_ONLY_SYMBOLS
1065 RTS_MINGW_ONLY_SYMBOLS
1066 RTS_CYGWIN_ONLY_SYMBOLS
1067 RTS_DARWIN_ONLY_SYMBOLS
1070 #if defined(darwin_HOST_OS) && defined(i386_HOST_ARCH)
1071 // dyld stub code contains references to this,
1072 // but it should never be called because we treat
1073 // lazy pointers as nonlazy.
1074 { "dyld_stub_binding_helper", (void*)0xDEADBEEF },
1076 { 0, 0 } /* sentinel */
1081 /* -----------------------------------------------------------------------------
1082 * Insert symbols into hash tables, checking for duplicates.
1085 static void ghciInsertStrHashTable ( char* obj_name,
1091 if (lookupHashTable(table, (StgWord)key) == NULL)
1093 insertStrHashTable(table, (StgWord)key, data);
1098 "GHCi runtime linker: fatal error: I found a duplicate definition for symbol\n"
1100 "whilst processing object file\n"
1102 "This could be caused by:\n"
1103 " * Loading two different object files which export the same symbol\n"
1104 " * Specifying the same object file twice on the GHCi command line\n"
1105 " * An incorrect `package.conf' entry, causing some object to be\n"
1107 "GHCi cannot safely continue in this situation. Exiting now. Sorry.\n"
1114 /* -----------------------------------------------------------------------------
1115 * initialize the object linker
1119 static int linker_init_done = 0 ;
1121 #if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1122 static void *dl_prog_handle;
1123 static regex_t re_invalid;
1124 static regex_t re_realso;
1126 static Mutex dl_mutex; // mutex to protect dlopen/dlerror critical section
1134 #if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1138 IF_DEBUG(linker, debugBelch("initLinker: start\n"));
1140 /* Make initLinker idempotent, so we can call it
1141 before evey relevant operation; that means we
1142 don't need to initialise the linker separately */
1143 if (linker_init_done == 1) {
1144 IF_DEBUG(linker, debugBelch("initLinker: idempotent return\n"));
1147 linker_init_done = 1;
1150 #if defined(THREADED_RTS) && (defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO))
1151 initMutex(&dl_mutex);
1153 stablehash = allocStrHashTable();
1154 symhash = allocStrHashTable();
1156 /* populate the symbol table with stuff from the RTS */
1157 for (sym = rtsSyms; sym->lbl != NULL; sym++) {
1158 ghciInsertStrHashTable("(GHCi built-in symbols)",
1159 symhash, sym->lbl, sym->addr);
1160 IF_DEBUG(linker, debugBelch("initLinker: inserting rts symbol %s, %p\n", sym->lbl, sym->addr));
1162 # if defined(OBJFORMAT_MACHO) && defined(powerpc_HOST_ARCH)
1163 machoInitSymbolsWithoutUnderscore();
1166 # if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1167 # if defined(RTLD_DEFAULT)
1168 dl_prog_handle = RTLD_DEFAULT;
1170 dl_prog_handle = dlopen(NULL, RTLD_LAZY);
1171 # endif /* RTLD_DEFAULT */
1173 compileResult = regcomp(&re_invalid,
1174 "(([^ \t()])+\\.so([^ \t:()])*):([ \t])*invalid ELF header",
1176 ASSERT( compileResult == 0 );
1177 compileResult = regcomp(&re_realso,
1178 "GROUP *\\( *(([^ )])+)",
1180 ASSERT( compileResult == 0 );
1183 #if !defined(ALWAYS_PIC) && defined(x86_64_HOST_ARCH)
1184 if (RtsFlags.MiscFlags.linkerMemBase != 0) {
1185 // User-override for mmap_32bit_base
1186 mmap_32bit_base = (void*)RtsFlags.MiscFlags.linkerMemBase;
1190 #if defined(mingw32_HOST_OS)
1192 * These two libraries cause problems when added to the static link,
1193 * but are necessary for resolving symbols in GHCi, hence we load
1194 * them manually here.
1200 IF_DEBUG(linker, debugBelch("initLinker: done\n"));
1205 exitLinker( void ) {
1206 #if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1207 if (linker_init_done == 1) {
1208 regfree(&re_invalid);
1209 regfree(&re_realso);
1211 closeMutex(&dl_mutex);
1217 /* -----------------------------------------------------------------------------
1218 * Loading DLL or .so dynamic libraries
1219 * -----------------------------------------------------------------------------
1221 * Add a DLL from which symbols may be found. In the ELF case, just
1222 * do RTLD_GLOBAL-style add, so no further messing around needs to
1223 * happen in order that symbols in the loaded .so are findable --
1224 * lookupSymbol() will subsequently see them by dlsym on the program's
1225 * dl-handle. Returns NULL if success, otherwise ptr to an err msg.
1227 * In the PEi386 case, open the DLLs and put handles to them in a
1228 * linked list. When looking for a symbol, try all handles in the
1229 * list. This means that we need to load even DLLs that are guaranteed
1230 * to be in the ghc.exe image already, just so we can get a handle
1231 * to give to loadSymbol, so that we can find the symbols. For such
1232 * libraries, the LoadLibrary call should be a no-op except for returning
1237 #if defined(OBJFORMAT_PEi386)
1238 /* A record for storing handles into DLLs. */
1243 struct _OpenedDLL* next;
1248 /* A list thereof. */
1249 static OpenedDLL* opened_dlls = NULL;
1252 # if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1255 internal_dlopen(const char *dll_name)
1261 // omitted: RTLD_NOW
1262 // see http://www.haskell.org/pipermail/cvs-ghc/2007-September/038570.html
1264 debugBelch("internal_dlopen: dll_name = '%s'\n", dll_name));
1266 //-------------- Begin critical section ------------------
1267 // This critical section is necessary because dlerror() is not
1268 // required to be reentrant (see POSIX -- IEEE Std 1003.1-2008)
1269 // Also, the error message returned must be copied to preserve it
1272 ACQUIRE_LOCK(&dl_mutex);
1273 hdl = dlopen(dll_name, RTLD_LAZY | RTLD_GLOBAL);
1277 /* dlopen failed; return a ptr to the error msg. */
1279 if (errmsg == NULL) errmsg = "addDLL: unknown error";
1280 errmsg_copy = stgMallocBytes(strlen(errmsg)+1, "addDLL");
1281 strcpy(errmsg_copy, errmsg);
1282 errmsg = errmsg_copy;
1284 RELEASE_LOCK(&dl_mutex);
1285 //--------------- End critical section -------------------
1292 addDLL( char *dll_name )
1294 # if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1295 /* ------------------- ELF DLL loader ------------------- */
1298 regmatch_t match[NMATCH];
1301 size_t match_length;
1302 #define MAXLINE 1000
1308 IF_DEBUG(linker, debugBelch("addDLL: dll_name = '%s'\n", dll_name));
1309 errmsg = internal_dlopen(dll_name);
1311 if (errmsg == NULL) {
1315 // GHC Trac ticket #2615
1316 // On some systems (e.g., Gentoo Linux) dynamic files (e.g. libc.so)
1317 // contain linker scripts rather than ELF-format object code. This
1318 // code handles the situation by recognizing the real object code
1319 // file name given in the linker script.
1321 // If an "invalid ELF header" error occurs, it is assumed that the
1322 // .so file contains a linker script instead of ELF object code.
1323 // In this case, the code looks for the GROUP ( ... ) linker
1324 // directive. If one is found, the first file name inside the
1325 // parentheses is treated as the name of a dynamic library and the
1326 // code attempts to dlopen that file. If this is also unsuccessful,
1327 // an error message is returned.
1329 // see if the error message is due to an invalid ELF header
1330 IF_DEBUG(linker, debugBelch("errmsg = '%s'\n", errmsg));
1331 result = regexec(&re_invalid, errmsg, (size_t) NMATCH, match, 0);
1332 IF_DEBUG(linker, debugBelch("result = %i\n", result));
1334 // success -- try to read the named file as a linker script
1335 match_length = (size_t) stg_min((match[1].rm_eo - match[1].rm_so),
1337 strncpy(line, (errmsg+(match[1].rm_so)),match_length);
1338 line[match_length] = '\0'; // make sure string is null-terminated
1339 IF_DEBUG(linker, debugBelch ("file name = '%s'\n", line));
1340 if ((fp = fopen(line, "r")) == NULL) {
1341 return errmsg; // return original error if open fails
1343 // try to find a GROUP ( ... ) command
1344 while (fgets(line, MAXLINE, fp) != NULL) {
1345 IF_DEBUG(linker, debugBelch("input line = %s", line));
1346 if (regexec(&re_realso, line, (size_t) NMATCH, match, 0) == 0) {
1347 // success -- try to dlopen the first named file
1348 IF_DEBUG(linker, debugBelch("match%s\n",""));
1349 line[match[1].rm_eo] = '\0';
1350 errmsg = internal_dlopen(line+match[1].rm_so);
1353 // if control reaches here, no GROUP ( ... ) directive was found
1354 // and the original error message is returned to the caller
1360 # elif defined(OBJFORMAT_PEi386)
1361 /* ------------------- Win32 DLL loader ------------------- */
1369 /* debugBelch("\naddDLL; dll_name = `%s'\n", dll_name); */
1371 /* See if we've already got it, and ignore if so. */
1372 for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next) {
1373 if (0 == strcmp(o_dll->name, dll_name))
1377 /* The file name has no suffix (yet) so that we can try
1378 both foo.dll and foo.drv
1380 The documentation for LoadLibrary says:
1381 If no file name extension is specified in the lpFileName
1382 parameter, the default library extension .dll is
1383 appended. However, the file name string can include a trailing
1384 point character (.) to indicate that the module name has no
1387 buf = stgMallocBytes(strlen(dll_name) + 10, "addDLL");
1388 sprintf(buf, "%s.DLL", dll_name);
1389 instance = LoadLibrary(buf);
1390 if (instance == NULL) {
1391 if (GetLastError() != ERROR_MOD_NOT_FOUND) goto error;
1392 // KAA: allow loading of drivers (like winspool.drv)
1393 sprintf(buf, "%s.DRV", dll_name);
1394 instance = LoadLibrary(buf);
1395 if (instance == NULL) {
1396 if (GetLastError() != ERROR_MOD_NOT_FOUND) goto error;
1397 // #1883: allow loading of unix-style libfoo.dll DLLs
1398 sprintf(buf, "lib%s.DLL", dll_name);
1399 instance = LoadLibrary(buf);
1400 if (instance == NULL) {
1407 /* Add this DLL to the list of DLLs in which to search for symbols. */
1408 o_dll = stgMallocBytes( sizeof(OpenedDLL), "addDLL" );
1409 o_dll->name = stgMallocBytes(1+strlen(dll_name), "addDLL");
1410 strcpy(o_dll->name, dll_name);
1411 o_dll->instance = instance;
1412 o_dll->next = opened_dlls;
1413 opened_dlls = o_dll;
1419 sysErrorBelch(dll_name);
1421 /* LoadLibrary failed; return a ptr to the error msg. */
1422 return "addDLL: could not load DLL";
1425 barf("addDLL: not implemented on this platform");
1429 /* -----------------------------------------------------------------------------
1430 * insert a stable symbol in the hash table
1434 insertStableSymbol(char* obj_name, char* key, StgPtr p)
1436 ghciInsertStrHashTable(obj_name, stablehash, key, getStablePtr(p));
1440 /* -----------------------------------------------------------------------------
1441 * insert a symbol in the hash table
1444 insertSymbol(char* obj_name, char* key, void* data)
1446 ghciInsertStrHashTable(obj_name, symhash, key, data);
1449 /* -----------------------------------------------------------------------------
1450 * lookup a symbol in the hash table
1453 lookupSymbol( char *lbl )
1456 IF_DEBUG(linker, debugBelch("lookupSymbol: looking up %s\n", lbl));
1458 ASSERT(symhash != NULL);
1459 val = lookupStrHashTable(symhash, lbl);
1462 IF_DEBUG(linker, debugBelch("lookupSymbol: symbol not found\n"));
1463 # if defined(OBJFORMAT_ELF)
1464 return dlsym(dl_prog_handle, lbl);
1465 # elif defined(OBJFORMAT_MACHO)
1467 /* On OS X 10.3 and later, we use dlsym instead of the old legacy
1470 HACK: On OS X, global symbols are prefixed with an underscore.
1471 However, dlsym wants us to omit the leading underscore from the
1472 symbol name. For now, we simply strip it off here (and ONLY
1475 IF_DEBUG(linker, debugBelch("lookupSymbol: looking up %s with dlsym\n", lbl));
1476 ASSERT(lbl[0] == '_');
1477 return dlsym(dl_prog_handle, lbl+1);
1479 if(NSIsSymbolNameDefined(lbl)) {
1480 NSSymbol symbol = NSLookupAndBindSymbol(lbl);
1481 return NSAddressOfSymbol(symbol);
1485 # endif /* HAVE_DLFCN_H */
1486 # elif defined(OBJFORMAT_PEi386)
1489 sym = lookupSymbolInDLLs((unsigned char*)lbl);
1490 if (sym != NULL) { return sym; };
1492 // Also try looking up the symbol without the @N suffix. Some
1493 // DLLs have the suffixes on their symbols, some don't.
1494 zapTrailingAtSign ( (unsigned char*)lbl );
1495 sym = lookupSymbolInDLLs((unsigned char*)lbl);
1496 if (sym != NULL) { return sym; };
1504 IF_DEBUG(linker, debugBelch("lookupSymbol: value of %s is %p\n", lbl, val));
1509 /* -----------------------------------------------------------------------------
1510 * Debugging aid: look in GHCi's object symbol tables for symbols
1511 * within DELTA bytes of the specified address, and show their names.
1514 void ghci_enquire ( char* addr );
1516 void ghci_enquire ( char* addr )
1521 const int DELTA = 64;
1526 for (oc = objects; oc; oc = oc->next) {
1527 for (i = 0; i < oc->n_symbols; i++) {
1528 sym = oc->symbols[i];
1529 if (sym == NULL) continue;
1532 a = lookupStrHashTable(symhash, sym);
1535 // debugBelch("ghci_enquire: can't find %s\n", sym);
1537 else if (addr-DELTA <= a && a <= addr+DELTA) {
1538 debugBelch("%p + %3d == `%s'\n", addr, (int)(a - addr), sym);
1546 #define ROUND_UP(x,size) ((x + size - 1) & ~(size - 1))
1549 mmapForLinker (size_t bytes, nat flags, int fd)
1551 void *map_addr = NULL;
1554 static nat fixed = 0;
1556 pagesize = getpagesize();
1557 size = ROUND_UP(bytes, pagesize);
1559 #if !defined(ALWAYS_PIC) && defined(x86_64_HOST_ARCH)
1562 if (mmap_32bit_base != 0) {
1563 map_addr = mmap_32bit_base;
1567 result = mmap(map_addr, size, PROT_EXEC|PROT_READ|PROT_WRITE,
1568 MAP_PRIVATE|TRY_MAP_32BIT|fixed|flags, fd, 0);
1570 if (result == MAP_FAILED) {
1571 sysErrorBelch("mmap %lu bytes at %p",(lnat)size,map_addr);
1572 errorBelch("Try specifying an address with +RTS -xm<addr> -RTS");
1573 stg_exit(EXIT_FAILURE);
1576 #if !defined(ALWAYS_PIC) && defined(x86_64_HOST_ARCH)
1577 if (mmap_32bit_base != 0) {
1578 if (result == map_addr) {
1579 mmap_32bit_base = (StgWord8*)map_addr + size;
1581 if ((W_)result > 0x80000000) {
1582 // oops, we were given memory over 2Gb
1583 #if defined(freebsd_HOST_OS) || defined(dragonfly_HOST_OS)
1584 // Some platforms require MAP_FIXED. This is normally
1585 // a bad idea, because MAP_FIXED will overwrite
1586 // existing mappings.
1587 munmap(result,size);
1591 barf("loadObj: failed to mmap() memory below 2Gb; asked for %lu bytes at %p. Try specifying an address with +RTS -xm<addr> -RTS", size, map_addr, result);
1594 // hmm, we were given memory somewhere else, but it's
1595 // still under 2Gb so we can use it. Next time, ask
1596 // for memory right after the place we just got some
1597 mmap_32bit_base = (StgWord8*)result + size;
1601 if ((W_)result > 0x80000000) {
1602 // oops, we were given memory over 2Gb
1603 // ... try allocating memory somewhere else?;
1604 debugTrace(DEBUG_linker,"MAP_32BIT didn't work; gave us %lu bytes at 0x%p", bytes, result);
1605 munmap(result, size);
1607 // Set a base address and try again... (guess: 1Gb)
1608 mmap_32bit_base = (void*)0x40000000;
1619 mkOc( char *path, char *image, int imageSize,
1620 char *archiveMemberName
1622 #ifdef darwin_HOST_OS
1629 oc = stgMallocBytes(sizeof(ObjectCode), "loadArchive(oc)");
1631 # if defined(OBJFORMAT_ELF)
1632 oc->formatName = "ELF";
1633 # elif defined(OBJFORMAT_PEi386)
1634 oc->formatName = "PEi386";
1635 # elif defined(OBJFORMAT_MACHO)
1636 oc->formatName = "Mach-O";
1639 barf("loadObj: not implemented on this platform");
1643 /* sigh, strdup() isn't a POSIX function, so do it the long way */
1644 oc->fileName = stgMallocBytes( strlen(path)+1, "loadObj" );
1645 strcpy(oc->fileName, path);
1647 if (archiveMemberName) {
1648 oc->archiveMemberName = stgMallocBytes( strlen(archiveMemberName)+1, "loadObj" );
1649 strcpy(oc->archiveMemberName, archiveMemberName);
1652 oc->archiveMemberName = NULL;
1655 oc->fileSize = imageSize;
1657 oc->sections = NULL;
1658 oc->proddables = NULL;
1661 #ifdef darwin_HOST_OS
1662 oc->misalignment = misalignment;
1666 /* chain it onto the list of objects */
1674 loadArchive( char *path )
1681 size_t thisFileNameSize;
1683 size_t fileNameSize;
1684 int isObject, isGnuIndex;
1687 int gnuFileIndexSize;
1688 #if !defined(USE_MMAP) && defined(darwin_HOST_OS)
1692 IF_DEBUG(linker, debugBelch("loadArchive: Loading archive `%s'\n", path));
1694 gnuFileIndex = NULL;
1695 gnuFileIndexSize = 0;
1698 fileName = stgMallocBytes(fileNameSize, "loadArchive(fileName)");
1700 f = fopen(path, "rb");
1702 barf("loadObj: can't read `%s'", path);
1704 n = fread ( tmp, 1, 8, f );
1705 if (strncmp(tmp, "!<arch>\n", 8) != 0)
1706 barf("loadArchive: Not an archive: `%s'", path);
1709 n = fread ( fileName, 1, 16, f );
1715 barf("loadArchive: Failed reading file name from `%s'", path);
1718 n = fread ( tmp, 1, 12, f );
1720 barf("loadArchive: Failed reading mod time from `%s'", path);
1721 n = fread ( tmp, 1, 6, f );
1723 barf("loadArchive: Failed reading owner from `%s'", path);
1724 n = fread ( tmp, 1, 6, f );
1726 barf("loadArchive: Failed reading group from `%s'", path);
1727 n = fread ( tmp, 1, 8, f );
1729 barf("loadArchive: Failed reading mode from `%s'", path);
1730 n = fread ( tmp, 1, 10, f );
1732 barf("loadArchive: Failed reading size from `%s'", path);
1734 for (n = 0; isdigit(tmp[n]); n++);
1736 memberSize = atoi(tmp);
1737 n = fread ( tmp, 1, 2, f );
1738 if (strncmp(tmp, "\x60\x0A", 2) != 0)
1739 barf("loadArchive: Failed reading magic from `%s' at %ld. Got %c%c",
1740 path, ftell(f), tmp[0], tmp[1]);
1743 /* Check for BSD-variant large filenames */
1744 if (0 == strncmp(fileName, "#1/", 3)) {
1745 fileName[16] = '\0';
1746 if (isdigit(fileName[3])) {
1747 for (n = 4; isdigit(fileName[n]); n++);
1749 thisFileNameSize = atoi(fileName + 3);
1750 memberSize -= thisFileNameSize;
1751 if (thisFileNameSize >= fileNameSize) {
1752 /* Double it to avoid potentially continually
1753 increasing it by 1 */
1754 fileNameSize = thisFileNameSize * 2;
1755 fileName = stgReallocBytes(fileName, fileNameSize, "loadArchive(fileName)");
1757 n = fread ( fileName, 1, thisFileNameSize, f );
1758 if (n != (int)thisFileNameSize) {
1759 barf("loadArchive: Failed reading filename from `%s'",
1762 fileName[thisFileNameSize] = 0;
1765 barf("loadArchive: BSD-variant filename size not found while reading filename from `%s'", path);
1768 /* Check for GNU file index file */
1769 else if (0 == strncmp(fileName, "//", 2)) {
1771 thisFileNameSize = 0;
1774 /* Check for a file in the GNU file index */
1775 else if (fileName[0] == '/') {
1776 if (isdigit(fileName[1])) {
1779 for (n = 2; isdigit(fileName[n]); n++);
1781 n = atoi(fileName + 1);
1783 if (gnuFileIndex == NULL) {
1784 barf("loadArchive: GNU-variant filename without an index while reading from `%s'", path);
1786 if (n < 0 || n > gnuFileIndexSize) {
1787 barf("loadArchive: GNU-variant filename offset %d out of range [0..%d] while reading filename from `%s'", n, gnuFileIndexSize, path);
1789 if (n != 0 && gnuFileIndex[n - 1] != '\n') {
1790 barf("loadArchive: GNU-variant filename offset %d invalid (range [0..%d]) while reading filename from `%s'", n, gnuFileIndexSize, path);
1792 for (i = n; gnuFileIndex[i] != '/'; i++);
1793 thisFileNameSize = i - n;
1794 if (thisFileNameSize >= fileNameSize) {
1795 /* Double it to avoid potentially continually
1796 increasing it by 1 */
1797 fileNameSize = thisFileNameSize * 2;
1798 fileName = stgReallocBytes(fileName, fileNameSize, "loadArchive(fileName)");
1800 memcpy(fileName, gnuFileIndex + n, thisFileNameSize);
1801 fileName[thisFileNameSize] = '\0';
1803 else if (fileName[1] == ' ') {
1805 thisFileNameSize = 0;
1808 barf("loadArchive: GNU-variant filename offset not found while reading filename from `%s'", path);
1811 /* Finally, the case where the filename field actually contains
1814 /* GNU ar terminates filenames with a '/', this allowing
1815 spaces in filenames. So first look to see if there is a
1817 for (thisFileNameSize = 0;
1818 thisFileNameSize < 16;
1819 thisFileNameSize++) {
1820 if (fileName[thisFileNameSize] == '/') {
1821 fileName[thisFileNameSize] = '\0';
1825 /* If we didn't find a '/', then a space teminates the
1826 filename. Note that if we don't find one, then
1827 thisFileNameSize ends up as 16, and we already have the
1829 if (thisFileNameSize == 16) {
1830 for (thisFileNameSize = 0;
1831 thisFileNameSize < 16;
1832 thisFileNameSize++) {
1833 if (fileName[thisFileNameSize] == ' ') {
1834 fileName[thisFileNameSize] = '\0';
1842 debugBelch("loadArchive: Found member file `%s'\n", fileName));
1844 isObject = thisFileNameSize >= 2
1845 && fileName[thisFileNameSize - 2] == '.'
1846 && fileName[thisFileNameSize - 1] == 'o';
1849 char *archiveMemberName;
1851 IF_DEBUG(linker, debugBelch("loadArchive: Member is an object file...loading...\n"));
1853 /* We can't mmap from the archive directly, as object
1854 files need to be 8-byte aligned but files in .ar
1855 archives are 2-byte aligned. When possible we use mmap
1856 to get some anonymous memory, as on 64-bit platforms if
1857 we use malloc then we can be given memory above 2^32.
1858 In the mmap case we're probably wasting lots of space;
1859 we could do better. */
1860 #if defined(USE_MMAP)
1861 image = mmapForLinker(memberSize, MAP_ANONYMOUS, -1);
1862 #elif defined(darwin_HOST_OS)
1864 misalignment = machoGetMisalignment(f);
1865 image = stgMallocBytes(memberSize + misalignment, "loadArchive(image)");
1866 image += misalignment;
1868 image = stgMallocBytes(memberSize, "loadArchive(image)");
1870 n = fread ( image, 1, memberSize, f );
1871 if (n != memberSize) {
1872 barf("loadArchive: error whilst reading `%s'", path);
1875 archiveMemberName = stgMallocBytes(strlen(path) + thisFileNameSize + 3,
1876 "loadArchive(file)");
1877 sprintf(archiveMemberName, "%s(%.*s)",
1878 path, (int)thisFileNameSize, fileName);
1880 oc = mkOc(path, image, memberSize, archiveMemberName
1882 #ifdef darwin_HOST_OS
1888 stgFree(archiveMemberName);
1890 if (0 == loadOc(oc)) {
1895 else if (isGnuIndex) {
1896 if (gnuFileIndex != NULL) {
1897 barf("loadArchive: GNU-variant index found, but already have an index, while reading filename from `%s'", path);
1899 IF_DEBUG(linker, debugBelch("loadArchive: Found GNU-variant file index\n"));
1901 gnuFileIndex = mmapForLinker(memberSize + 1, MAP_ANONYMOUS, -1);
1903 gnuFileIndex = stgMallocBytes(memberSize + 1, "loadArchive(image)");
1905 n = fread ( gnuFileIndex, 1, memberSize, f );
1906 if (n != memberSize) {
1907 barf("loadArchive: error whilst reading `%s'", path);
1909 gnuFileIndex[memberSize] = '/';
1910 gnuFileIndexSize = memberSize;
1913 n = fseek(f, memberSize, SEEK_CUR);
1915 barf("loadArchive: error whilst seeking by %d in `%s'",
1918 /* .ar files are 2-byte aligned */
1919 if (memberSize % 2) {
1920 n = fread ( tmp, 1, 1, f );
1926 barf("loadArchive: Failed reading padding from `%s'", path);
1935 if (gnuFileIndex != NULL) {
1937 munmap(gnuFileIndex, gnuFileIndexSize + 1);
1939 stgFree(gnuFileIndex);
1946 /* -----------------------------------------------------------------------------
1947 * Load an obj (populate the global symbol table, but don't resolve yet)
1949 * Returns: 1 if ok, 0 on error.
1952 loadObj( char *path )
1964 IF_DEBUG(linker, debugBelch("loadObj %s\n", path));
1968 /* debugBelch("loadObj %s\n", path ); */
1970 /* Check that we haven't already loaded this object.
1971 Ignore requests to load multiple times */
1975 for (o = objects; o; o = o->next) {
1976 if (0 == strcmp(o->fileName, path)) {
1978 break; /* don't need to search further */
1982 IF_DEBUG(linker, debugBelch(
1983 "GHCi runtime linker: warning: looks like you're trying to load the\n"
1984 "same object file twice:\n"
1986 "GHCi will ignore this, but be warned.\n"
1988 return 1; /* success */
1992 r = stat(path, &st);
1994 IF_DEBUG(linker, debugBelch("File doesn't exist\n"));
1998 fileSize = st.st_size;
2001 /* On many architectures malloc'd memory isn't executable, so we need to use mmap. */
2003 #if defined(openbsd_HOST_OS)
2004 fd = open(path, O_RDONLY, S_IRUSR);
2006 fd = open(path, O_RDONLY);
2009 barf("loadObj: can't open `%s'", path);
2011 image = mmapForLinker(fileSize, 0, fd);
2015 #else /* !USE_MMAP */
2016 /* load the image into memory */
2017 f = fopen(path, "rb");
2019 barf("loadObj: can't read `%s'", path);
2021 # if defined(mingw32_HOST_OS)
2022 // TODO: We would like to use allocateExec here, but allocateExec
2023 // cannot currently allocate blocks large enough.
2024 image = VirtualAlloc(NULL, fileSize, MEM_RESERVE | MEM_COMMIT,
2025 PAGE_EXECUTE_READWRITE);
2026 # elif defined(darwin_HOST_OS)
2027 // In a Mach-O .o file, all sections can and will be misaligned
2028 // if the total size of the headers is not a multiple of the
2029 // desired alignment. This is fine for .o files that only serve
2030 // as input for the static linker, but it's not fine for us,
2031 // as SSE (used by gcc for floating point) and Altivec require
2032 // 16-byte alignment.
2033 // We calculate the correct alignment from the header before
2034 // reading the file, and then we misalign image on purpose so
2035 // that the actual sections end up aligned again.
2036 misalignment = machoGetMisalignment(f);
2037 image = stgMallocBytes(fileSize + misalignment, "loadObj(image)");
2038 image += misalignment;
2040 image = stgMallocBytes(fileSize, "loadObj(image)");
2045 n = fread ( image, 1, fileSize, f );
2047 barf("loadObj: error whilst reading `%s'", path);
2050 #endif /* USE_MMAP */
2052 oc = mkOc(path, image, fileSize, NULL
2054 #ifdef darwin_HOST_OS
2064 loadOc( ObjectCode* oc ) {
2067 IF_DEBUG(linker, debugBelch("loadOc\n"));
2069 # if defined(OBJFORMAT_MACHO) && (defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH))
2070 r = ocAllocateSymbolExtras_MachO ( oc );
2072 IF_DEBUG(linker, debugBelch("ocAllocateSymbolExtras_MachO failed\n"));
2075 # elif defined(OBJFORMAT_ELF) && (defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH))
2076 r = ocAllocateSymbolExtras_ELF ( oc );
2078 IF_DEBUG(linker, debugBelch("ocAllocateSymbolExtras_ELF failed\n"));
2083 /* verify the in-memory image */
2084 # if defined(OBJFORMAT_ELF)
2085 r = ocVerifyImage_ELF ( oc );
2086 # elif defined(OBJFORMAT_PEi386)
2087 r = ocVerifyImage_PEi386 ( oc );
2088 # elif defined(OBJFORMAT_MACHO)
2089 r = ocVerifyImage_MachO ( oc );
2091 barf("loadObj: no verify method");
2094 IF_DEBUG(linker, debugBelch("ocVerifyImage_* failed\n"));
2098 /* build the symbol list for this image */
2099 # if defined(OBJFORMAT_ELF)
2100 r = ocGetNames_ELF ( oc );
2101 # elif defined(OBJFORMAT_PEi386)
2102 r = ocGetNames_PEi386 ( oc );
2103 # elif defined(OBJFORMAT_MACHO)
2104 r = ocGetNames_MachO ( oc );
2106 barf("loadObj: no getNames method");
2109 IF_DEBUG(linker, debugBelch("ocGetNames_* failed\n"));
2113 /* loaded, but not resolved yet */
2114 oc->status = OBJECT_LOADED;
2115 IF_DEBUG(linker, debugBelch("loadObj done.\n"));
2120 /* -----------------------------------------------------------------------------
2121 * resolve all the currently unlinked objects in memory
2123 * Returns: 1 if ok, 0 on error.
2131 IF_DEBUG(linker, debugBelch("resolveObjs: start\n"));
2134 for (oc = objects; oc; oc = oc->next) {
2135 if (oc->status != OBJECT_RESOLVED) {
2136 # if defined(OBJFORMAT_ELF)
2137 r = ocResolve_ELF ( oc );
2138 # elif defined(OBJFORMAT_PEi386)
2139 r = ocResolve_PEi386 ( oc );
2140 # elif defined(OBJFORMAT_MACHO)
2141 r = ocResolve_MachO ( oc );
2143 barf("resolveObjs: not implemented on this platform");
2145 if (!r) { return r; }
2146 oc->status = OBJECT_RESOLVED;
2149 IF_DEBUG(linker, debugBelch("resolveObjs: done\n"));
2153 /* -----------------------------------------------------------------------------
2154 * delete an object from the pool
2157 unloadObj( char *path )
2159 ObjectCode *oc, *prev;
2160 HsBool unloadedAnyObj = HS_BOOL_FALSE;
2162 ASSERT(symhash != NULL);
2163 ASSERT(objects != NULL);
2168 for (oc = objects; oc; prev = oc, oc = oc->next) {
2169 if (!strcmp(oc->fileName,path)) {
2171 /* Remove all the mappings for the symbols within this
2176 for (i = 0; i < oc->n_symbols; i++) {
2177 if (oc->symbols[i] != NULL) {
2178 removeStrHashTable(symhash, oc->symbols[i], NULL);
2186 prev->next = oc->next;
2189 // We're going to leave this in place, in case there are
2190 // any pointers from the heap into it:
2191 // #ifdef mingw32_HOST_OS
2192 // VirtualFree(oc->image);
2194 // stgFree(oc->image);
2196 stgFree(oc->fileName);
2197 stgFree(oc->symbols);
2198 stgFree(oc->sections);
2201 /* This could be a member of an archive so continue
2202 * unloading other members. */
2203 unloadedAnyObj = HS_BOOL_TRUE;
2207 if (unloadedAnyObj) {
2211 errorBelch("unloadObj: can't find `%s' to unload", path);
2216 /* -----------------------------------------------------------------------------
2217 * Sanity checking. For each ObjectCode, maintain a list of address ranges
2218 * which may be prodded during relocation, and abort if we try and write
2219 * outside any of these.
2221 static void addProddableBlock ( ObjectCode* oc, void* start, int size )
2224 = stgMallocBytes(sizeof(ProddableBlock), "addProddableBlock");
2225 IF_DEBUG(linker, debugBelch("addProddableBlock %p %p %d\n", oc, start, size));
2229 pb->next = oc->proddables;
2230 oc->proddables = pb;
2233 static void checkProddableBlock ( ObjectCode* oc, void* addr )
2236 for (pb = oc->proddables; pb != NULL; pb = pb->next) {
2237 char* s = (char*)(pb->start);
2238 char* e = s + pb->size - 1;
2239 char* a = (char*)addr;
2240 /* Assumes that the biggest fixup involves a 4-byte write. This
2241 probably needs to be changed to 8 (ie, +7) on 64-bit
2243 if (a >= s && (a+3) <= e) return;
2245 barf("checkProddableBlock: invalid fixup in runtime linker");
2248 /* -----------------------------------------------------------------------------
2249 * Section management.
2251 static void addSection ( ObjectCode* oc, SectionKind kind,
2252 void* start, void* end )
2254 Section* s = stgMallocBytes(sizeof(Section), "addSection");
2258 s->next = oc->sections;
2261 debugBelch("addSection: %p-%p (size %d), kind %d\n",
2262 start, ((char*)end)-1, end - start + 1, kind );
2267 /* --------------------------------------------------------------------------
2269 * This is about allocating a small chunk of memory for every symbol in the
2270 * object file. We make sure that the SymboLExtras are always "in range" of
2271 * limited-range PC-relative instructions on various platforms by allocating
2272 * them right next to the object code itself.
2275 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
2278 ocAllocateSymbolExtras
2280 Allocate additional space at the end of the object file image to make room
2281 for jump islands (powerpc, x86_64) and GOT entries (x86_64).
2283 PowerPC relative branch instructions have a 24 bit displacement field.
2284 As PPC code is always 4-byte-aligned, this yields a +-32MB range.
2285 If a particular imported symbol is outside this range, we have to redirect
2286 the jump to a short piece of new code that just loads the 32bit absolute
2287 address and jumps there.
2288 On x86_64, PC-relative jumps and PC-relative accesses to the GOT are limited
2291 This function just allocates space for one SymbolExtra for every
2292 undefined symbol in the object file. The code for the jump islands is
2293 filled in by makeSymbolExtra below.
2296 static int ocAllocateSymbolExtras( ObjectCode* oc, int count, int first )
2303 int misalignment = 0;
2304 #ifdef darwin_HOST_OS
2305 misalignment = oc->misalignment;
2311 // round up to the nearest 4
2312 aligned = (oc->fileSize + 3) & ~3;
2315 pagesize = getpagesize();
2316 n = ROUND_UP( oc->fileSize, pagesize );
2317 m = ROUND_UP( aligned + sizeof (SymbolExtra) * count, pagesize );
2319 /* we try to use spare space at the end of the last page of the
2320 * image for the jump islands, but if there isn't enough space
2321 * then we have to map some (anonymously, remembering MAP_32BIT).
2323 if( m > n ) // we need to allocate more pages
2325 oc->symbol_extras = mmapForLinker(sizeof(SymbolExtra) * count,
2330 oc->symbol_extras = (SymbolExtra *) (oc->image + aligned);
2333 oc->image -= misalignment;
2334 oc->image = stgReallocBytes( oc->image,
2336 aligned + sizeof (SymbolExtra) * count,
2337 "ocAllocateSymbolExtras" );
2338 oc->image += misalignment;
2340 oc->symbol_extras = (SymbolExtra *) (oc->image + aligned);
2341 #endif /* USE_MMAP */
2343 memset( oc->symbol_extras, 0, sizeof (SymbolExtra) * count );
2346 oc->symbol_extras = NULL;
2348 oc->first_symbol_extra = first;
2349 oc->n_symbol_extras = count;
2354 static SymbolExtra* makeSymbolExtra( ObjectCode* oc,
2355 unsigned long symbolNumber,
2356 unsigned long target )
2360 ASSERT( symbolNumber >= oc->first_symbol_extra
2361 && symbolNumber - oc->first_symbol_extra < oc->n_symbol_extras);
2363 extra = &oc->symbol_extras[symbolNumber - oc->first_symbol_extra];
2365 #ifdef powerpc_HOST_ARCH
2366 // lis r12, hi16(target)
2367 extra->jumpIsland.lis_r12 = 0x3d80;
2368 extra->jumpIsland.hi_addr = target >> 16;
2370 // ori r12, r12, lo16(target)
2371 extra->jumpIsland.ori_r12_r12 = 0x618c;
2372 extra->jumpIsland.lo_addr = target & 0xffff;
2375 extra->jumpIsland.mtctr_r12 = 0x7d8903a6;
2378 extra->jumpIsland.bctr = 0x4e800420;
2380 #ifdef x86_64_HOST_ARCH
2382 static uint8_t jmp[] = { 0xFF, 0x25, 0xF2, 0xFF, 0xFF, 0xFF };
2383 extra->addr = target;
2384 memcpy(extra->jumpIsland, jmp, 6);
2392 /* --------------------------------------------------------------------------
2393 * PowerPC specifics (instruction cache flushing)
2394 * ------------------------------------------------------------------------*/
2396 #ifdef powerpc_HOST_ARCH
2398 ocFlushInstructionCache
2400 Flush the data & instruction caches.
2401 Because the PPC has split data/instruction caches, we have to
2402 do that whenever we modify code at runtime.
2404 static void ocFlushInstructionCacheFrom(void* begin, size_t length)
2406 size_t n = (length + 3) / 4;
2407 unsigned long* p = begin;
2411 __asm__ volatile ( "dcbf 0,%0\n\t"
2419 __asm__ volatile ( "sync\n\t"
2423 static void ocFlushInstructionCache( ObjectCode *oc )
2425 /* The main object code */
2426 ocFlushInstructionCacheFrom(oc->image + oc->misalignment, oc->fileSize);
2429 ocFlushInstructionCacheFrom(oc->symbol_extras, sizeof(SymbolExtra) * oc->n_symbol_extras);
2433 /* --------------------------------------------------------------------------
2434 * PEi386 specifics (Win32 targets)
2435 * ------------------------------------------------------------------------*/
2437 /* The information for this linker comes from
2438 Microsoft Portable Executable
2439 and Common Object File Format Specification
2440 revision 5.1 January 1998
2441 which SimonM says comes from the MS Developer Network CDs.
2443 It can be found there (on older CDs), but can also be found
2446 http://www.microsoft.com/hwdev/hardware/PECOFF.asp
2448 (this is Rev 6.0 from February 1999).
2450 Things move, so if that fails, try searching for it via
2452 http://www.google.com/search?q=PE+COFF+specification
2454 The ultimate reference for the PE format is the Winnt.h
2455 header file that comes with the Platform SDKs; as always,
2456 implementations will drift wrt their documentation.
2458 A good background article on the PE format is Matt Pietrek's
2459 March 1994 article in Microsoft System Journal (MSJ)
2460 (Vol.9, No. 3): "Peering Inside the PE: A Tour of the
2461 Win32 Portable Executable File Format." The info in there
2462 has recently been updated in a two part article in
2463 MSDN magazine, issues Feb and March 2002,
2464 "Inside Windows: An In-Depth Look into the Win32 Portable
2465 Executable File Format"
2467 John Levine's book "Linkers and Loaders" contains useful
2472 #if defined(OBJFORMAT_PEi386)
2476 typedef unsigned char UChar;
2477 typedef unsigned short UInt16;
2478 typedef unsigned int UInt32;
2485 UInt16 NumberOfSections;
2486 UInt32 TimeDateStamp;
2487 UInt32 PointerToSymbolTable;
2488 UInt32 NumberOfSymbols;
2489 UInt16 SizeOfOptionalHeader;
2490 UInt16 Characteristics;
2494 #define sizeof_COFF_header 20
2501 UInt32 VirtualAddress;
2502 UInt32 SizeOfRawData;
2503 UInt32 PointerToRawData;
2504 UInt32 PointerToRelocations;
2505 UInt32 PointerToLinenumbers;
2506 UInt16 NumberOfRelocations;
2507 UInt16 NumberOfLineNumbers;
2508 UInt32 Characteristics;
2512 #define sizeof_COFF_section 40
2519 UInt16 SectionNumber;
2522 UChar NumberOfAuxSymbols;
2526 #define sizeof_COFF_symbol 18
2531 UInt32 VirtualAddress;
2532 UInt32 SymbolTableIndex;
2537 #define sizeof_COFF_reloc 10
2540 /* From PE spec doc, section 3.3.2 */
2541 /* Note use of MYIMAGE_* since IMAGE_* are already defined in
2542 windows.h -- for the same purpose, but I want to know what I'm
2544 #define MYIMAGE_FILE_RELOCS_STRIPPED 0x0001
2545 #define MYIMAGE_FILE_EXECUTABLE_IMAGE 0x0002
2546 #define MYIMAGE_FILE_DLL 0x2000
2547 #define MYIMAGE_FILE_SYSTEM 0x1000
2548 #define MYIMAGE_FILE_BYTES_REVERSED_HI 0x8000
2549 #define MYIMAGE_FILE_BYTES_REVERSED_LO 0x0080
2550 #define MYIMAGE_FILE_32BIT_MACHINE 0x0100
2552 /* From PE spec doc, section 5.4.2 and 5.4.4 */
2553 #define MYIMAGE_SYM_CLASS_EXTERNAL 2
2554 #define MYIMAGE_SYM_CLASS_STATIC 3
2555 #define MYIMAGE_SYM_UNDEFINED 0
2557 /* From PE spec doc, section 4.1 */
2558 #define MYIMAGE_SCN_CNT_CODE 0x00000020
2559 #define MYIMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040
2560 #define MYIMAGE_SCN_LNK_NRELOC_OVFL 0x01000000
2562 /* From PE spec doc, section 5.2.1 */
2563 #define MYIMAGE_REL_I386_DIR32 0x0006
2564 #define MYIMAGE_REL_I386_REL32 0x0014
2567 /* We use myindex to calculate array addresses, rather than
2568 simply doing the normal subscript thing. That's because
2569 some of the above structs have sizes which are not
2570 a whole number of words. GCC rounds their sizes up to a
2571 whole number of words, which means that the address calcs
2572 arising from using normal C indexing or pointer arithmetic
2573 are just plain wrong. Sigh.
2576 myindex ( int scale, void* base, int index )
2579 ((UChar*)base) + scale * index;
2584 printName ( UChar* name, UChar* strtab )
2586 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
2587 UInt32 strtab_offset = * (UInt32*)(name+4);
2588 debugBelch("%s", strtab + strtab_offset );
2591 for (i = 0; i < 8; i++) {
2592 if (name[i] == 0) break;
2593 debugBelch("%c", name[i] );
2600 copyName ( UChar* name, UChar* strtab, UChar* dst, int dstSize )
2602 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
2603 UInt32 strtab_offset = * (UInt32*)(name+4);
2604 strncpy ( (char*)dst, (char*)strtab+strtab_offset, dstSize );
2610 if (name[i] == 0) break;
2620 cstring_from_COFF_symbol_name ( UChar* name, UChar* strtab )
2623 /* If the string is longer than 8 bytes, look in the
2624 string table for it -- this will be correctly zero terminated.
2626 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
2627 UInt32 strtab_offset = * (UInt32*)(name+4);
2628 return ((UChar*)strtab) + strtab_offset;
2630 /* Otherwise, if shorter than 8 bytes, return the original,
2631 which by defn is correctly terminated.
2633 if (name[7]==0) return name;
2634 /* The annoying case: 8 bytes. Copy into a temporary
2635 (XXX which is never freed ...)
2637 newstr = stgMallocBytes(9, "cstring_from_COFF_symbol_name");
2639 strncpy((char*)newstr,(char*)name,8);
2644 /* Getting the name of a section is mildly tricky, so we make a
2645 function for it. Sadly, in one case we have to copy the string
2646 (when it is exactly 8 bytes long there's no trailing '\0'), so for
2647 consistency we *always* copy the string; the caller must free it
2650 cstring_from_section_name (UChar* name, UChar* strtab)
2655 int strtab_offset = strtol((char*)name+1,NULL,10);
2656 int len = strlen(((char*)strtab) + strtab_offset);
2658 newstr = stgMallocBytes(len, "cstring_from_section_symbol_name");
2659 strcpy((char*)newstr, (char*)((UChar*)strtab) + strtab_offset);
2664 newstr = stgMallocBytes(9, "cstring_from_section_symbol_name");
2666 strncpy((char*)newstr,(char*)name,8);
2672 /* Just compares the short names (first 8 chars) */
2673 static COFF_section *
2674 findPEi386SectionCalled ( ObjectCode* oc, UChar* name )
2678 = (COFF_header*)(oc->image);
2679 COFF_section* sectab
2681 ((UChar*)(oc->image))
2682 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2684 for (i = 0; i < hdr->NumberOfSections; i++) {
2687 COFF_section* section_i
2689 myindex ( sizeof_COFF_section, sectab, i );
2690 n1 = (UChar*) &(section_i->Name);
2692 if (n1[0]==n2[0] && n1[1]==n2[1] && n1[2]==n2[2] &&
2693 n1[3]==n2[3] && n1[4]==n2[4] && n1[5]==n2[5] &&
2694 n1[6]==n2[6] && n1[7]==n2[7])
2703 zapTrailingAtSign ( UChar* sym )
2705 # define my_isdigit(c) ((c) >= '0' && (c) <= '9')
2707 if (sym[0] == 0) return;
2709 while (sym[i] != 0) i++;
2712 while (j > 0 && my_isdigit(sym[j])) j--;
2713 if (j > 0 && sym[j] == '@' && j != i) sym[j] = 0;
2718 lookupSymbolInDLLs ( UChar *lbl )
2723 for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next) {
2724 /* debugBelch("look in %s for %s\n", o_dll->name, lbl); */
2726 if (lbl[0] == '_') {
2727 /* HACK: if the name has an initial underscore, try stripping
2728 it off & look that up first. I've yet to verify whether there's
2729 a Rule that governs whether an initial '_' *should always* be
2730 stripped off when mapping from import lib name to the DLL name.
2732 sym = GetProcAddress(o_dll->instance, (char*)(lbl+1));
2734 /*debugBelch("found %s in %s\n", lbl+1,o_dll->name);*/
2738 sym = GetProcAddress(o_dll->instance, (char*)lbl);
2740 /*debugBelch("found %s in %s\n", lbl,o_dll->name);*/
2749 ocVerifyImage_PEi386 ( ObjectCode* oc )
2754 COFF_section* sectab;
2755 COFF_symbol* symtab;
2757 /* debugBelch("\nLOADING %s\n", oc->fileName); */
2758 hdr = (COFF_header*)(oc->image);
2759 sectab = (COFF_section*) (
2760 ((UChar*)(oc->image))
2761 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2763 symtab = (COFF_symbol*) (
2764 ((UChar*)(oc->image))
2765 + hdr->PointerToSymbolTable
2767 strtab = ((UChar*)symtab)
2768 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2770 if (hdr->Machine != 0x14c) {
2771 errorBelch("%s: Not x86 PEi386", oc->fileName);
2774 if (hdr->SizeOfOptionalHeader != 0) {
2775 errorBelch("%s: PEi386 with nonempty optional header", oc->fileName);
2778 if ( /* (hdr->Characteristics & MYIMAGE_FILE_RELOCS_STRIPPED) || */
2779 (hdr->Characteristics & MYIMAGE_FILE_EXECUTABLE_IMAGE) ||
2780 (hdr->Characteristics & MYIMAGE_FILE_DLL) ||
2781 (hdr->Characteristics & MYIMAGE_FILE_SYSTEM) ) {
2782 errorBelch("%s: Not a PEi386 object file", oc->fileName);
2785 if ( (hdr->Characteristics & MYIMAGE_FILE_BYTES_REVERSED_HI)
2786 /* || !(hdr->Characteristics & MYIMAGE_FILE_32BIT_MACHINE) */ ) {
2787 errorBelch("%s: Invalid PEi386 word size or endiannness: %d",
2789 (int)(hdr->Characteristics));
2792 /* If the string table size is way crazy, this might indicate that
2793 there are more than 64k relocations, despite claims to the
2794 contrary. Hence this test. */
2795 /* debugBelch("strtab size %d\n", * (UInt32*)strtab); */
2797 if ( (*(UInt32*)strtab) > 600000 ) {
2798 /* Note that 600k has no special significance other than being
2799 big enough to handle the almost-2MB-sized lumps that
2800 constitute HSwin32*.o. */
2801 debugBelch("PEi386 object has suspiciously large string table; > 64k relocs?");
2806 /* No further verification after this point; only debug printing. */
2808 IF_DEBUG(linker, i=1);
2809 if (i == 0) return 1;
2811 debugBelch( "sectab offset = %d\n", ((UChar*)sectab) - ((UChar*)hdr) );
2812 debugBelch( "symtab offset = %d\n", ((UChar*)symtab) - ((UChar*)hdr) );
2813 debugBelch( "strtab offset = %d\n", ((UChar*)strtab) - ((UChar*)hdr) );
2816 debugBelch( "Machine: 0x%x\n", (UInt32)(hdr->Machine) );
2817 debugBelch( "# sections: %d\n", (UInt32)(hdr->NumberOfSections) );
2818 debugBelch( "time/date: 0x%x\n", (UInt32)(hdr->TimeDateStamp) );
2819 debugBelch( "symtab offset: %d\n", (UInt32)(hdr->PointerToSymbolTable) );
2820 debugBelch( "# symbols: %d\n", (UInt32)(hdr->NumberOfSymbols) );
2821 debugBelch( "sz of opt hdr: %d\n", (UInt32)(hdr->SizeOfOptionalHeader) );
2822 debugBelch( "characteristics: 0x%x\n", (UInt32)(hdr->Characteristics) );
2824 /* Print the section table. */
2826 for (i = 0; i < hdr->NumberOfSections; i++) {
2828 COFF_section* sectab_i
2830 myindex ( sizeof_COFF_section, sectab, i );
2837 printName ( sectab_i->Name, strtab );
2847 sectab_i->VirtualSize,
2848 sectab_i->VirtualAddress,
2849 sectab_i->SizeOfRawData,
2850 sectab_i->PointerToRawData,
2851 sectab_i->NumberOfRelocations,
2852 sectab_i->PointerToRelocations,
2853 sectab_i->PointerToRawData
2855 reltab = (COFF_reloc*) (
2856 ((UChar*)(oc->image)) + sectab_i->PointerToRelocations
2859 if ( sectab_i->Characteristics & MYIMAGE_SCN_LNK_NRELOC_OVFL ) {
2860 /* If the relocation field (a short) has overflowed, the
2861 * real count can be found in the first reloc entry.
2863 * See Section 4.1 (last para) of the PE spec (rev6.0).
2865 COFF_reloc* rel = (COFF_reloc*)
2866 myindex ( sizeof_COFF_reloc, reltab, 0 );
2867 noRelocs = rel->VirtualAddress;
2870 noRelocs = sectab_i->NumberOfRelocations;
2874 for (; j < noRelocs; j++) {
2876 COFF_reloc* rel = (COFF_reloc*)
2877 myindex ( sizeof_COFF_reloc, reltab, j );
2879 " type 0x%-4x vaddr 0x%-8x name `",
2881 rel->VirtualAddress );
2882 sym = (COFF_symbol*)
2883 myindex ( sizeof_COFF_symbol, symtab, rel->SymbolTableIndex );
2884 /* Hmm..mysterious looking offset - what's it for? SOF */
2885 printName ( sym->Name, strtab -10 );
2892 debugBelch("string table has size 0x%x\n", * (UInt32*)strtab );
2893 debugBelch("---START of string table---\n");
2894 for (i = 4; i < *(Int32*)strtab; i++) {
2896 debugBelch("\n"); else
2897 debugBelch("%c", strtab[i] );
2899 debugBelch("--- END of string table---\n");
2904 COFF_symbol* symtab_i;
2905 if (i >= (Int32)(hdr->NumberOfSymbols)) break;
2906 symtab_i = (COFF_symbol*)
2907 myindex ( sizeof_COFF_symbol, symtab, i );
2913 printName ( symtab_i->Name, strtab );
2922 (Int32)(symtab_i->SectionNumber),
2923 (UInt32)symtab_i->Type,
2924 (UInt32)symtab_i->StorageClass,
2925 (UInt32)symtab_i->NumberOfAuxSymbols
2927 i += symtab_i->NumberOfAuxSymbols;
2937 ocGetNames_PEi386 ( ObjectCode* oc )
2940 COFF_section* sectab;
2941 COFF_symbol* symtab;
2948 hdr = (COFF_header*)(oc->image);
2949 sectab = (COFF_section*) (
2950 ((UChar*)(oc->image))
2951 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2953 symtab = (COFF_symbol*) (
2954 ((UChar*)(oc->image))
2955 + hdr->PointerToSymbolTable
2957 strtab = ((UChar*)(oc->image))
2958 + hdr->PointerToSymbolTable
2959 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2961 /* Allocate space for any (local, anonymous) .bss sections. */
2963 for (i = 0; i < hdr->NumberOfSections; i++) {
2966 COFF_section* sectab_i
2968 myindex ( sizeof_COFF_section, sectab, i );
2970 char *secname = cstring_from_section_name(sectab_i->Name, strtab);
2972 if (0 != strcmp(secname, ".bss")) {
2979 /* sof 10/05: the PE spec text isn't too clear regarding what
2980 * the SizeOfRawData field is supposed to hold for object
2981 * file sections containing just uninitialized data -- for executables,
2982 * it is supposed to be zero; unclear what it's supposed to be
2983 * for object files. However, VirtualSize is guaranteed to be
2984 * zero for object files, which definitely suggests that SizeOfRawData
2985 * will be non-zero (where else would the size of this .bss section be
2986 * stored?) Looking at the COFF_section info for incoming object files,
2987 * this certainly appears to be the case.
2989 * => I suspect we've been incorrectly handling .bss sections in (relocatable)
2990 * object files up until now. This turned out to bite us with ghc-6.4.1's use
2991 * of gcc-3.4.x, which has started to emit initially-zeroed-out local 'static'
2992 * variable decls into to the .bss section. (The specific function in Q which
2993 * triggered this is libraries/base/cbits/dirUtils.c:__hscore_getFolderPath())
2995 if (sectab_i->VirtualSize == 0 && sectab_i->SizeOfRawData == 0) continue;
2996 /* This is a non-empty .bss section. Allocate zeroed space for
2997 it, and set its PointerToRawData field such that oc->image +
2998 PointerToRawData == addr_of_zeroed_space. */
2999 bss_sz = sectab_i->VirtualSize;
3000 if ( bss_sz < sectab_i->SizeOfRawData) { bss_sz = sectab_i->SizeOfRawData; }
3001 zspace = stgCallocBytes(1, bss_sz, "ocGetNames_PEi386(anonymous bss)");
3002 sectab_i->PointerToRawData = ((UChar*)zspace) - ((UChar*)(oc->image));
3003 addProddableBlock(oc, zspace, bss_sz);
3004 /* debugBelch("BSS anon section at 0x%x\n", zspace); */
3007 /* Copy section information into the ObjectCode. */
3009 for (i = 0; i < hdr->NumberOfSections; i++) {
3015 = SECTIONKIND_OTHER;
3016 COFF_section* sectab_i
3018 myindex ( sizeof_COFF_section, sectab, i );
3020 char *secname = cstring_from_section_name(sectab_i->Name, strtab);
3022 IF_DEBUG(linker, debugBelch("section name = %s\n", secname ));
3025 /* I'm sure this is the Right Way to do it. However, the
3026 alternative of testing the sectab_i->Name field seems to
3027 work ok with Cygwin.
3029 if (sectab_i->Characteristics & MYIMAGE_SCN_CNT_CODE ||
3030 sectab_i->Characteristics & MYIMAGE_SCN_CNT_INITIALIZED_DATA)
3031 kind = SECTIONKIND_CODE_OR_RODATA;
3034 if (0==strcmp(".text",(char*)secname) ||
3035 0==strcmp(".rdata",(char*)secname)||
3036 0==strcmp(".rodata",(char*)secname))
3037 kind = SECTIONKIND_CODE_OR_RODATA;
3038 if (0==strcmp(".data",(char*)secname) ||
3039 0==strcmp(".bss",(char*)secname))
3040 kind = SECTIONKIND_RWDATA;
3042 ASSERT(sectab_i->SizeOfRawData == 0 || sectab_i->VirtualSize == 0);
3043 sz = sectab_i->SizeOfRawData;
3044 if (sz < sectab_i->VirtualSize) sz = sectab_i->VirtualSize;
3046 start = ((UChar*)(oc->image)) + sectab_i->PointerToRawData;
3047 end = start + sz - 1;
3049 if (kind == SECTIONKIND_OTHER
3050 /* Ignore sections called which contain stabs debugging
3052 && 0 != strcmp(".stab", (char*)secname)
3053 && 0 != strcmp(".stabstr", (char*)secname)
3054 /* ignore constructor section for now */
3055 && 0 != strcmp(".ctors", (char*)secname)
3056 /* ignore section generated from .ident */
3057 && 0!= strncmp(".debug", (char*)secname, 6)
3058 /* ignore unknown section that appeared in gcc 3.4.5(?) */
3059 && 0!= strcmp(".reloc", (char*)secname)
3060 && 0 != strcmp(".rdata$zzz", (char*)secname)
3062 errorBelch("Unknown PEi386 section name `%s' (while processing: %s)", secname, oc->fileName);
3067 if (kind != SECTIONKIND_OTHER && end >= start) {
3068 addSection(oc, kind, start, end);
3069 addProddableBlock(oc, start, end - start + 1);
3075 /* Copy exported symbols into the ObjectCode. */
3077 oc->n_symbols = hdr->NumberOfSymbols;
3078 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
3079 "ocGetNames_PEi386(oc->symbols)");
3080 /* Call me paranoid; I don't care. */
3081 for (i = 0; i < oc->n_symbols; i++)
3082 oc->symbols[i] = NULL;
3086 COFF_symbol* symtab_i;
3087 if (i >= (Int32)(hdr->NumberOfSymbols)) break;
3088 symtab_i = (COFF_symbol*)
3089 myindex ( sizeof_COFF_symbol, symtab, i );
3093 if (symtab_i->StorageClass == MYIMAGE_SYM_CLASS_EXTERNAL
3094 && symtab_i->SectionNumber != MYIMAGE_SYM_UNDEFINED) {
3095 /* This symbol is global and defined, viz, exported */
3096 /* for MYIMAGE_SYMCLASS_EXTERNAL
3097 && !MYIMAGE_SYM_UNDEFINED,
3098 the address of the symbol is:
3099 address of relevant section + offset in section
3101 COFF_section* sectabent
3102 = (COFF_section*) myindex ( sizeof_COFF_section,
3104 symtab_i->SectionNumber-1 );
3105 addr = ((UChar*)(oc->image))
3106 + (sectabent->PointerToRawData
3110 if (symtab_i->SectionNumber == MYIMAGE_SYM_UNDEFINED
3111 && symtab_i->Value > 0) {
3112 /* This symbol isn't in any section at all, ie, global bss.
3113 Allocate zeroed space for it. */
3114 addr = stgCallocBytes(1, symtab_i->Value,
3115 "ocGetNames_PEi386(non-anonymous bss)");
3116 addSection(oc, SECTIONKIND_RWDATA, addr,
3117 ((UChar*)addr) + symtab_i->Value - 1);
3118 addProddableBlock(oc, addr, symtab_i->Value);
3119 /* debugBelch("BSS section at 0x%x\n", addr); */
3122 if (addr != NULL ) {
3123 sname = cstring_from_COFF_symbol_name ( symtab_i->Name, strtab );
3124 /* debugBelch("addSymbol %p `%s \n", addr,sname); */
3125 IF_DEBUG(linker, debugBelch("addSymbol %p `%s'\n", addr,sname);)
3126 ASSERT(i >= 0 && i < oc->n_symbols);
3127 /* cstring_from_COFF_symbol_name always succeeds. */
3128 oc->symbols[i] = (char*)sname;
3129 ghciInsertStrHashTable(oc->fileName, symhash, (char*)sname, addr);
3133 "IGNORING symbol %d\n"
3137 printName ( symtab_i->Name, strtab );
3146 (Int32)(symtab_i->SectionNumber),
3147 (UInt32)symtab_i->Type,
3148 (UInt32)symtab_i->StorageClass,
3149 (UInt32)symtab_i->NumberOfAuxSymbols
3154 i += symtab_i->NumberOfAuxSymbols;
3163 ocResolve_PEi386 ( ObjectCode* oc )
3166 COFF_section* sectab;
3167 COFF_symbol* symtab;
3177 /* ToDo: should be variable-sized? But is at least safe in the
3178 sense of buffer-overrun-proof. */
3180 /* debugBelch("resolving for %s\n", oc->fileName); */
3182 hdr = (COFF_header*)(oc->image);
3183 sectab = (COFF_section*) (
3184 ((UChar*)(oc->image))
3185 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
3187 symtab = (COFF_symbol*) (
3188 ((UChar*)(oc->image))
3189 + hdr->PointerToSymbolTable
3191 strtab = ((UChar*)(oc->image))
3192 + hdr->PointerToSymbolTable
3193 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
3195 for (i = 0; i < hdr->NumberOfSections; i++) {
3196 COFF_section* sectab_i
3198 myindex ( sizeof_COFF_section, sectab, i );
3201 ((UChar*)(oc->image)) + sectab_i->PointerToRelocations
3204 char *secname = cstring_from_section_name(sectab_i->Name, strtab);
3206 /* Ignore sections called which contain stabs debugging
3208 if (0 == strcmp(".stab", (char*)secname)
3209 || 0 == strcmp(".stabstr", (char*)secname)
3210 || 0 == strcmp(".ctors", (char*)secname)
3211 || 0 == strncmp(".debug", (char*)secname, 6)
3212 || 0 == strcmp(".rdata$zzz", (char*)secname)) {
3219 if ( sectab_i->Characteristics & MYIMAGE_SCN_LNK_NRELOC_OVFL ) {
3220 /* If the relocation field (a short) has overflowed, the
3221 * real count can be found in the first reloc entry.
3223 * See Section 4.1 (last para) of the PE spec (rev6.0).
3225 * Nov2003 update: the GNU linker still doesn't correctly
3226 * handle the generation of relocatable object files with
3227 * overflown relocations. Hence the output to warn of potential
3230 COFF_reloc* rel = (COFF_reloc*)
3231 myindex ( sizeof_COFF_reloc, reltab, 0 );
3232 noRelocs = rel->VirtualAddress;
3234 /* 10/05: we now assume (and check for) a GNU ld that is capable
3235 * of handling object files with (>2^16) of relocs.
3238 debugBelch("WARNING: Overflown relocation field (# relocs found: %u)\n",
3243 noRelocs = sectab_i->NumberOfRelocations;
3248 for (; j < noRelocs; j++) {
3250 COFF_reloc* reltab_j
3252 myindex ( sizeof_COFF_reloc, reltab, j );
3254 /* the location to patch */
3256 ((UChar*)(oc->image))
3257 + (sectab_i->PointerToRawData
3258 + reltab_j->VirtualAddress
3259 - sectab_i->VirtualAddress )
3261 /* the existing contents of pP */
3263 /* the symbol to connect to */
3264 sym = (COFF_symbol*)
3265 myindex ( sizeof_COFF_symbol,
3266 symtab, reltab_j->SymbolTableIndex );
3269 "reloc sec %2d num %3d: type 0x%-4x "
3270 "vaddr 0x%-8x name `",
3272 (UInt32)reltab_j->Type,
3273 reltab_j->VirtualAddress );
3274 printName ( sym->Name, strtab );
3275 debugBelch("'\n" ));
3277 if (sym->StorageClass == MYIMAGE_SYM_CLASS_STATIC) {
3278 COFF_section* section_sym
3279 = findPEi386SectionCalled ( oc, sym->Name );
3281 errorBelch("%s: can't find section `%s'", oc->fileName, sym->Name);
3284 S = ((UInt32)(oc->image))
3285 + (section_sym->PointerToRawData
3288 copyName ( sym->Name, strtab, symbol, 1000-1 );
3289 S = (UInt32) lookupSymbol( (char*)symbol );
3290 if ((void*)S != NULL) goto foundit;
3291 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3295 checkProddableBlock(oc, pP);
3296 switch (reltab_j->Type) {
3297 case MYIMAGE_REL_I386_DIR32:
3300 case MYIMAGE_REL_I386_REL32:
3301 /* Tricky. We have to insert a displacement at
3302 pP which, when added to the PC for the _next_
3303 insn, gives the address of the target (S).
3304 Problem is to know the address of the next insn
3305 when we only know pP. We assume that this
3306 literal field is always the last in the insn,
3307 so that the address of the next insn is pP+4
3308 -- hence the constant 4.
3309 Also I don't know if A should be added, but so
3310 far it has always been zero.
3312 SOF 05/2005: 'A' (old contents of *pP) have been observed
3313 to contain values other than zero (the 'wx' object file
3314 that came with wxhaskell-0.9.4; dunno how it was compiled..).
3315 So, add displacement to old value instead of asserting
3316 A to be zero. Fixes wxhaskell-related crashes, and no other
3317 ill effects have been observed.
3319 Update: the reason why we're seeing these more elaborate
3320 relocations is due to a switch in how the NCG compiles SRTs
3321 and offsets to them from info tables. SRTs live in .(ro)data,
3322 while info tables live in .text, causing GAS to emit REL32/DISP32
3323 relocations with non-zero values. Adding the displacement is
3324 the right thing to do.
3326 *pP = S - ((UInt32)pP) - 4 + A;
3329 debugBelch("%s: unhandled PEi386 relocation type %d",
3330 oc->fileName, reltab_j->Type);
3337 IF_DEBUG(linker, debugBelch("completed %s", oc->fileName));
3341 #endif /* defined(OBJFORMAT_PEi386) */
3344 /* --------------------------------------------------------------------------
3346 * ------------------------------------------------------------------------*/
3348 #if defined(OBJFORMAT_ELF)
3353 #if defined(sparc_HOST_ARCH)
3354 # define ELF_TARGET_SPARC /* Used inside <elf.h> */
3355 #elif defined(i386_HOST_ARCH)
3356 # define ELF_TARGET_386 /* Used inside <elf.h> */
3357 #elif defined(x86_64_HOST_ARCH)
3358 # define ELF_TARGET_X64_64
3362 #if !defined(openbsd_HOST_OS)
3365 /* openbsd elf has things in different places, with diff names */
3366 # include <elf_abi.h>
3367 # include <machine/reloc.h>
3368 # define R_386_32 RELOC_32
3369 # define R_386_PC32 RELOC_PC32
3372 /* If elf.h doesn't define it */
3373 # ifndef R_X86_64_PC64
3374 # define R_X86_64_PC64 24
3378 * Define a set of types which can be used for both ELF32 and ELF64
3382 #define ELFCLASS ELFCLASS64
3383 #define Elf_Addr Elf64_Addr
3384 #define Elf_Word Elf64_Word
3385 #define Elf_Sword Elf64_Sword
3386 #define Elf_Ehdr Elf64_Ehdr
3387 #define Elf_Phdr Elf64_Phdr
3388 #define Elf_Shdr Elf64_Shdr
3389 #define Elf_Sym Elf64_Sym
3390 #define Elf_Rel Elf64_Rel
3391 #define Elf_Rela Elf64_Rela
3393 #define ELF_ST_TYPE ELF64_ST_TYPE
3396 #define ELF_ST_BIND ELF64_ST_BIND
3399 #define ELF_R_TYPE ELF64_R_TYPE
3402 #define ELF_R_SYM ELF64_R_SYM
3405 #define ELFCLASS ELFCLASS32
3406 #define Elf_Addr Elf32_Addr
3407 #define Elf_Word Elf32_Word
3408 #define Elf_Sword Elf32_Sword
3409 #define Elf_Ehdr Elf32_Ehdr
3410 #define Elf_Phdr Elf32_Phdr
3411 #define Elf_Shdr Elf32_Shdr
3412 #define Elf_Sym Elf32_Sym
3413 #define Elf_Rel Elf32_Rel
3414 #define Elf_Rela Elf32_Rela
3416 #define ELF_ST_TYPE ELF32_ST_TYPE
3419 #define ELF_ST_BIND ELF32_ST_BIND
3422 #define ELF_R_TYPE ELF32_R_TYPE
3425 #define ELF_R_SYM ELF32_R_SYM
3431 * Functions to allocate entries in dynamic sections. Currently we simply
3432 * preallocate a large number, and we don't check if a entry for the given
3433 * target already exists (a linear search is too slow). Ideally these
3434 * entries would be associated with symbols.
3437 /* These sizes sufficient to load HSbase + HShaskell98 + a few modules */
3438 #define GOT_SIZE 0x20000
3439 #define FUNCTION_TABLE_SIZE 0x10000
3440 #define PLT_SIZE 0x08000
3443 static Elf_Addr got[GOT_SIZE];
3444 static unsigned int gotIndex;
3445 static Elf_Addr gp_val = (Elf_Addr)got;
3448 allocateGOTEntry(Elf_Addr target)
3452 if (gotIndex >= GOT_SIZE)
3453 barf("Global offset table overflow");
3455 entry = &got[gotIndex++];
3457 return (Elf_Addr)entry;
3461 #ifdef ELF_FUNCTION_DESC
3467 static FunctionDesc functionTable[FUNCTION_TABLE_SIZE];
3468 static unsigned int functionTableIndex;
3471 allocateFunctionDesc(Elf_Addr target)
3473 FunctionDesc *entry;
3475 if (functionTableIndex >= FUNCTION_TABLE_SIZE)
3476 barf("Function table overflow");
3478 entry = &functionTable[functionTableIndex++];
3480 entry->gp = (Elf_Addr)gp_val;
3481 return (Elf_Addr)entry;
3485 copyFunctionDesc(Elf_Addr target)
3487 FunctionDesc *olddesc = (FunctionDesc *)target;
3488 FunctionDesc *newdesc;
3490 newdesc = (FunctionDesc *)allocateFunctionDesc(olddesc->ip);
3491 newdesc->gp = olddesc->gp;
3492 return (Elf_Addr)newdesc;
3499 unsigned char code[sizeof(plt_code)];
3503 allocatePLTEntry(Elf_Addr target, ObjectCode *oc)
3505 PLTEntry *plt = (PLTEntry *)oc->plt;
3508 if (oc->pltIndex >= PLT_SIZE)
3509 barf("Procedure table overflow");
3511 entry = &plt[oc->pltIndex++];
3512 memcpy(entry->code, plt_code, sizeof(entry->code));
3513 PLT_RELOC(entry->code, target);
3514 return (Elf_Addr)entry;
3520 return (PLT_SIZE * sizeof(PLTEntry));
3526 * Generic ELF functions
3530 findElfSection ( void* objImage, Elf_Word sh_type )
3532 char* ehdrC = (char*)objImage;
3533 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3534 Elf_Shdr* shdr = (Elf_Shdr*)(ehdrC + ehdr->e_shoff);
3535 char* sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
3539 for (i = 0; i < ehdr->e_shnum; i++) {
3540 if (shdr[i].sh_type == sh_type
3541 /* Ignore the section header's string table. */
3542 && i != ehdr->e_shstrndx
3543 /* Ignore string tables named .stabstr, as they contain
3545 && 0 != memcmp(".stabstr", sh_strtab + shdr[i].sh_name, 8)
3547 ptr = ehdrC + shdr[i].sh_offset;
3555 ocVerifyImage_ELF ( ObjectCode* oc )
3559 int i, j, nent, nstrtab, nsymtabs;
3563 char* ehdrC = (char*)(oc->image);
3564 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3566 if (ehdr->e_ident[EI_MAG0] != ELFMAG0 ||
3567 ehdr->e_ident[EI_MAG1] != ELFMAG1 ||
3568 ehdr->e_ident[EI_MAG2] != ELFMAG2 ||
3569 ehdr->e_ident[EI_MAG3] != ELFMAG3) {
3570 errorBelch("%s: not an ELF object", oc->fileName);
3574 if (ehdr->e_ident[EI_CLASS] != ELFCLASS) {
3575 errorBelch("%s: unsupported ELF format", oc->fileName);
3579 if (ehdr->e_ident[EI_DATA] == ELFDATA2LSB) {
3580 IF_DEBUG(linker,debugBelch( "Is little-endian\n" ));
3582 if (ehdr->e_ident[EI_DATA] == ELFDATA2MSB) {
3583 IF_DEBUG(linker,debugBelch( "Is big-endian\n" ));
3585 errorBelch("%s: unknown endiannness", oc->fileName);
3589 if (ehdr->e_type != ET_REL) {
3590 errorBelch("%s: not a relocatable object (.o) file", oc->fileName);
3593 IF_DEBUG(linker, debugBelch( "Is a relocatable object (.o) file\n" ));
3595 IF_DEBUG(linker,debugBelch( "Architecture is " ));
3596 switch (ehdr->e_machine) {
3597 case EM_386: IF_DEBUG(linker,debugBelch( "x86" )); break;
3598 #ifdef EM_SPARC32PLUS
3599 case EM_SPARC32PLUS:
3601 case EM_SPARC: IF_DEBUG(linker,debugBelch( "sparc" )); break;
3603 case EM_IA_64: IF_DEBUG(linker,debugBelch( "ia64" )); break;
3605 case EM_PPC: IF_DEBUG(linker,debugBelch( "powerpc32" )); break;
3607 case EM_X86_64: IF_DEBUG(linker,debugBelch( "x86_64" )); break;
3608 #elif defined(EM_AMD64)
3609 case EM_AMD64: IF_DEBUG(linker,debugBelch( "amd64" )); break;
3611 default: IF_DEBUG(linker,debugBelch( "unknown" ));
3612 errorBelch("%s: unknown architecture (e_machine == %d)"
3613 , oc->fileName, ehdr->e_machine);
3617 IF_DEBUG(linker,debugBelch(
3618 "\nSection header table: start %ld, n_entries %d, ent_size %d\n",
3619 (long)ehdr->e_shoff, ehdr->e_shnum, ehdr->e_shentsize ));
3621 ASSERT (ehdr->e_shentsize == sizeof(Elf_Shdr));
3623 shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
3625 if (ehdr->e_shstrndx == SHN_UNDEF) {
3626 errorBelch("%s: no section header string table", oc->fileName);
3629 IF_DEBUG(linker,debugBelch( "Section header string table is section %d\n",
3631 sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
3634 for (i = 0; i < ehdr->e_shnum; i++) {
3635 IF_DEBUG(linker,debugBelch("%2d: ", i ));
3636 IF_DEBUG(linker,debugBelch("type=%2d ", (int)shdr[i].sh_type ));
3637 IF_DEBUG(linker,debugBelch("size=%4d ", (int)shdr[i].sh_size ));
3638 IF_DEBUG(linker,debugBelch("offs=%4d ", (int)shdr[i].sh_offset ));
3639 IF_DEBUG(linker,debugBelch(" (%p .. %p) ",
3640 ehdrC + shdr[i].sh_offset,
3641 ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1));
3643 if (shdr[i].sh_type == SHT_REL) {
3644 IF_DEBUG(linker,debugBelch("Rel " ));
3645 } else if (shdr[i].sh_type == SHT_RELA) {
3646 IF_DEBUG(linker,debugBelch("RelA " ));
3648 IF_DEBUG(linker,debugBelch(" "));
3651 IF_DEBUG(linker,debugBelch("sname=%s\n", sh_strtab + shdr[i].sh_name ));
3655 IF_DEBUG(linker,debugBelch( "\nString tables" ));
3658 for (i = 0; i < ehdr->e_shnum; i++) {
3659 if (shdr[i].sh_type == SHT_STRTAB
3660 /* Ignore the section header's string table. */
3661 && i != ehdr->e_shstrndx
3662 /* Ignore string tables named .stabstr, as they contain
3664 && 0 != memcmp(".stabstr", sh_strtab + shdr[i].sh_name, 8)
3666 IF_DEBUG(linker,debugBelch(" section %d is a normal string table", i ));
3667 strtab = ehdrC + shdr[i].sh_offset;
3672 errorBelch("%s: no string tables, or too many", oc->fileName);
3677 IF_DEBUG(linker,debugBelch( "\nSymbol tables" ));
3678 for (i = 0; i < ehdr->e_shnum; i++) {
3679 if (shdr[i].sh_type != SHT_SYMTAB) continue;
3680 IF_DEBUG(linker,debugBelch( "section %d is a symbol table\n", i ));
3682 stab = (Elf_Sym*) (ehdrC + shdr[i].sh_offset);
3683 nent = shdr[i].sh_size / sizeof(Elf_Sym);
3684 IF_DEBUG(linker,debugBelch( " number of entries is apparently %d (%ld rem)\n",
3686 (long)shdr[i].sh_size % sizeof(Elf_Sym)
3688 if (0 != shdr[i].sh_size % sizeof(Elf_Sym)) {
3689 errorBelch("%s: non-integral number of symbol table entries", oc->fileName);
3692 for (j = 0; j < nent; j++) {
3693 IF_DEBUG(linker,debugBelch(" %2d ", j ));
3694 IF_DEBUG(linker,debugBelch(" sec=%-5d size=%-3d val=%5p ",
3695 (int)stab[j].st_shndx,
3696 (int)stab[j].st_size,
3697 (char*)stab[j].st_value ));
3699 IF_DEBUG(linker,debugBelch("type=" ));
3700 switch (ELF_ST_TYPE(stab[j].st_info)) {
3701 case STT_NOTYPE: IF_DEBUG(linker,debugBelch("notype " )); break;
3702 case STT_OBJECT: IF_DEBUG(linker,debugBelch("object " )); break;
3703 case STT_FUNC : IF_DEBUG(linker,debugBelch("func " )); break;
3704 case STT_SECTION: IF_DEBUG(linker,debugBelch("section" )); break;
3705 case STT_FILE: IF_DEBUG(linker,debugBelch("file " )); break;
3706 default: IF_DEBUG(linker,debugBelch("? " )); break;
3708 IF_DEBUG(linker,debugBelch(" " ));
3710 IF_DEBUG(linker,debugBelch("bind=" ));
3711 switch (ELF_ST_BIND(stab[j].st_info)) {
3712 case STB_LOCAL : IF_DEBUG(linker,debugBelch("local " )); break;
3713 case STB_GLOBAL: IF_DEBUG(linker,debugBelch("global" )); break;
3714 case STB_WEAK : IF_DEBUG(linker,debugBelch("weak " )); break;
3715 default: IF_DEBUG(linker,debugBelch("? " )); break;
3717 IF_DEBUG(linker,debugBelch(" " ));
3719 IF_DEBUG(linker,debugBelch("name=%s\n", strtab + stab[j].st_name ));
3723 if (nsymtabs == 0) {
3724 errorBelch("%s: didn't find any symbol tables", oc->fileName);
3731 static int getSectionKind_ELF( Elf_Shdr *hdr, int *is_bss )
3735 if (hdr->sh_type == SHT_PROGBITS
3736 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_EXECINSTR)) {
3737 /* .text-style section */
3738 return SECTIONKIND_CODE_OR_RODATA;
3741 if (hdr->sh_type == SHT_PROGBITS
3742 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_WRITE)) {
3743 /* .data-style section */
3744 return SECTIONKIND_RWDATA;
3747 if (hdr->sh_type == SHT_PROGBITS
3748 && (hdr->sh_flags & SHF_ALLOC) && !(hdr->sh_flags & SHF_WRITE)) {
3749 /* .rodata-style section */
3750 return SECTIONKIND_CODE_OR_RODATA;
3753 if (hdr->sh_type == SHT_NOBITS
3754 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_WRITE)) {
3755 /* .bss-style section */
3757 return SECTIONKIND_RWDATA;
3760 return SECTIONKIND_OTHER;
3765 ocGetNames_ELF ( ObjectCode* oc )
3770 char* ehdrC = (char*)(oc->image);
3771 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3772 char* strtab = findElfSection ( ehdrC, SHT_STRTAB );
3773 Elf_Shdr* shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
3775 ASSERT(symhash != NULL);
3778 errorBelch("%s: no strtab", oc->fileName);
3783 for (i = 0; i < ehdr->e_shnum; i++) {
3784 /* Figure out what kind of section it is. Logic derived from
3785 Figure 1.14 ("Special Sections") of the ELF document
3786 ("Portable Formats Specification, Version 1.1"). */
3788 SectionKind kind = getSectionKind_ELF(&shdr[i], &is_bss);
3790 if (is_bss && shdr[i].sh_size > 0) {
3791 /* This is a non-empty .bss section. Allocate zeroed space for
3792 it, and set its .sh_offset field such that
3793 ehdrC + .sh_offset == addr_of_zeroed_space. */
3794 char* zspace = stgCallocBytes(1, shdr[i].sh_size,
3795 "ocGetNames_ELF(BSS)");
3796 shdr[i].sh_offset = ((char*)zspace) - ((char*)ehdrC);
3798 debugBelch("BSS section at 0x%x, size %d\n",
3799 zspace, shdr[i].sh_size);
3803 /* fill in the section info */
3804 if (kind != SECTIONKIND_OTHER && shdr[i].sh_size > 0) {
3805 addProddableBlock(oc, ehdrC + shdr[i].sh_offset, shdr[i].sh_size);
3806 addSection(oc, kind, ehdrC + shdr[i].sh_offset,
3807 ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1);
3810 if (shdr[i].sh_type != SHT_SYMTAB) continue;
3812 /* copy stuff into this module's object symbol table */
3813 stab = (Elf_Sym*) (ehdrC + shdr[i].sh_offset);
3814 nent = shdr[i].sh_size / sizeof(Elf_Sym);
3816 oc->n_symbols = nent;
3817 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
3818 "ocGetNames_ELF(oc->symbols)");
3820 for (j = 0; j < nent; j++) {
3822 char isLocal = FALSE; /* avoids uninit-var warning */
3824 char* nm = strtab + stab[j].st_name;
3825 int secno = stab[j].st_shndx;
3827 /* Figure out if we want to add it; if so, set ad to its
3828 address. Otherwise leave ad == NULL. */
3830 if (secno == SHN_COMMON) {
3832 ad = stgCallocBytes(1, stab[j].st_size, "ocGetNames_ELF(COMMON)");
3834 debugBelch("COMMON symbol, size %d name %s\n",
3835 stab[j].st_size, nm);
3837 /* Pointless to do addProddableBlock() for this area,
3838 since the linker should never poke around in it. */
3841 if ( ( ELF_ST_BIND(stab[j].st_info)==STB_GLOBAL
3842 || ELF_ST_BIND(stab[j].st_info)==STB_LOCAL
3844 /* and not an undefined symbol */
3845 && stab[j].st_shndx != SHN_UNDEF
3846 /* and not in a "special section" */
3847 && stab[j].st_shndx < SHN_LORESERVE
3849 /* and it's a not a section or string table or anything silly */
3850 ( ELF_ST_TYPE(stab[j].st_info)==STT_FUNC ||
3851 ELF_ST_TYPE(stab[j].st_info)==STT_OBJECT ||
3852 ELF_ST_TYPE(stab[j].st_info)==STT_NOTYPE
3855 /* Section 0 is the undefined section, hence > and not >=. */
3856 ASSERT(secno > 0 && secno < ehdr->e_shnum);
3858 if (shdr[secno].sh_type == SHT_NOBITS) {
3859 debugBelch(" BSS symbol, size %d off %d name %s\n",
3860 stab[j].st_size, stab[j].st_value, nm);
3863 ad = ehdrC + shdr[ secno ].sh_offset + stab[j].st_value;
3864 if (ELF_ST_BIND(stab[j].st_info)==STB_LOCAL) {
3867 #ifdef ELF_FUNCTION_DESC
3868 /* dlsym() and the initialisation table both give us function
3869 * descriptors, so to be consistent we store function descriptors
3870 * in the symbol table */
3871 if (ELF_ST_TYPE(stab[j].st_info) == STT_FUNC)
3872 ad = (char *)allocateFunctionDesc((Elf_Addr)ad);
3874 IF_DEBUG(linker,debugBelch( "addOTabName(GLOB): %10p %s %s\n",
3875 ad, oc->fileName, nm ));
3880 /* And the decision is ... */
3884 oc->symbols[j] = nm;
3887 /* Ignore entirely. */
3889 ghciInsertStrHashTable(oc->fileName, symhash, nm, ad);
3893 IF_DEBUG(linker,debugBelch( "skipping `%s'\n",
3894 strtab + stab[j].st_name ));
3897 "skipping bind = %d, type = %d, shndx = %d `%s'\n",
3898 (int)ELF_ST_BIND(stab[j].st_info),
3899 (int)ELF_ST_TYPE(stab[j].st_info),
3900 (int)stab[j].st_shndx,
3901 strtab + stab[j].st_name
3904 oc->symbols[j] = NULL;
3913 /* Do ELF relocations which lack an explicit addend. All x86-linux
3914 relocations appear to be of this form. */
3916 do_Elf_Rel_relocations ( ObjectCode* oc, char* ehdrC,
3917 Elf_Shdr* shdr, int shnum,
3918 Elf_Sym* stab, char* strtab )
3923 Elf_Rel* rtab = (Elf_Rel*) (ehdrC + shdr[shnum].sh_offset);
3924 int nent = shdr[shnum].sh_size / sizeof(Elf_Rel);
3925 int target_shndx = shdr[shnum].sh_info;
3926 int symtab_shndx = shdr[shnum].sh_link;
3928 stab = (Elf_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
3929 targ = (Elf_Word*)(ehdrC + shdr[ target_shndx ].sh_offset);
3930 IF_DEBUG(linker,debugBelch( "relocations for section %d using symtab %d\n",
3931 target_shndx, symtab_shndx ));
3933 /* Skip sections that we're not interested in. */
3936 SectionKind kind = getSectionKind_ELF(&shdr[target_shndx], &is_bss);
3937 if (kind == SECTIONKIND_OTHER) {
3938 IF_DEBUG(linker,debugBelch( "skipping (target section not loaded)"));
3943 for (j = 0; j < nent; j++) {
3944 Elf_Addr offset = rtab[j].r_offset;
3945 Elf_Addr info = rtab[j].r_info;
3947 Elf_Addr P = ((Elf_Addr)targ) + offset;
3948 Elf_Word* pP = (Elf_Word*)P;
3953 StgStablePtr stablePtr;
3956 IF_DEBUG(linker,debugBelch( "Rel entry %3d is raw(%6p %6p)",
3957 j, (void*)offset, (void*)info ));
3959 IF_DEBUG(linker,debugBelch( " ZERO" ));
3962 Elf_Sym sym = stab[ELF_R_SYM(info)];
3963 /* First see if it is a local symbol. */
3964 if (ELF_ST_BIND(sym.st_info) == STB_LOCAL) {
3965 /* Yes, so we can get the address directly from the ELF symbol
3967 symbol = sym.st_name==0 ? "(noname)" : strtab+sym.st_name;
3969 (ehdrC + shdr[ sym.st_shndx ].sh_offset
3970 + stab[ELF_R_SYM(info)].st_value);
3973 symbol = strtab + sym.st_name;
3974 stablePtr = (StgStablePtr)lookupHashTable(stablehash, (StgWord)symbol);
3975 if (NULL == stablePtr) {
3976 /* No, so look up the name in our global table. */
3977 S_tmp = lookupSymbol( symbol );
3978 S = (Elf_Addr)S_tmp;
3980 stableVal = deRefStablePtr( stablePtr );
3982 S = (Elf_Addr)S_tmp;
3986 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3989 IF_DEBUG(linker,debugBelch( "`%s' resolves to %p\n", symbol, (void*)S ));
3992 IF_DEBUG(linker,debugBelch( "Reloc: P = %p S = %p A = %p\n",
3993 (void*)P, (void*)S, (void*)A ));
3994 checkProddableBlock ( oc, pP );
3998 switch (ELF_R_TYPE(info)) {
3999 # ifdef i386_HOST_ARCH
4000 case R_386_32: *pP = value; break;
4001 case R_386_PC32: *pP = value - P; break;
4004 errorBelch("%s: unhandled ELF relocation(Rel) type %lu\n",
4005 oc->fileName, (lnat)ELF_R_TYPE(info));
4013 /* Do ELF relocations for which explicit addends are supplied.
4014 sparc-solaris relocations appear to be of this form. */
4016 do_Elf_Rela_relocations ( ObjectCode* oc, char* ehdrC,
4017 Elf_Shdr* shdr, int shnum,
4018 Elf_Sym* stab, char* strtab )
4021 char *symbol = NULL;
4023 Elf_Rela* rtab = (Elf_Rela*) (ehdrC + shdr[shnum].sh_offset);
4024 int nent = shdr[shnum].sh_size / sizeof(Elf_Rela);
4025 int target_shndx = shdr[shnum].sh_info;
4026 int symtab_shndx = shdr[shnum].sh_link;
4028 stab = (Elf_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
4029 targ = (Elf_Addr) (ehdrC + shdr[ target_shndx ].sh_offset);
4030 IF_DEBUG(linker,debugBelch( "relocations for section %d using symtab %d\n",
4031 target_shndx, symtab_shndx ));
4033 for (j = 0; j < nent; j++) {
4034 #if defined(DEBUG) || defined(sparc_HOST_ARCH) || defined(ia64_HOST_ARCH) || defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
4035 /* This #ifdef only serves to avoid unused-var warnings. */
4036 Elf_Addr offset = rtab[j].r_offset;
4037 Elf_Addr P = targ + offset;
4039 Elf_Addr info = rtab[j].r_info;
4040 Elf_Addr A = rtab[j].r_addend;
4044 # if defined(sparc_HOST_ARCH)
4045 Elf_Word* pP = (Elf_Word*)P;
4047 # elif defined(powerpc_HOST_ARCH)
4051 IF_DEBUG(linker,debugBelch( "Rel entry %3d is raw(%6p %6p %6p) ",
4052 j, (void*)offset, (void*)info,
4055 IF_DEBUG(linker,debugBelch( " ZERO" ));
4058 Elf_Sym sym = stab[ELF_R_SYM(info)];
4059 /* First see if it is a local symbol. */
4060 if (ELF_ST_BIND(sym.st_info) == STB_LOCAL) {
4061 /* Yes, so we can get the address directly from the ELF symbol
4063 symbol = sym.st_name==0 ? "(noname)" : strtab+sym.st_name;
4065 (ehdrC + shdr[ sym.st_shndx ].sh_offset
4066 + stab[ELF_R_SYM(info)].st_value);
4067 #ifdef ELF_FUNCTION_DESC
4068 /* Make a function descriptor for this function */
4069 if (S && ELF_ST_TYPE(sym.st_info) == STT_FUNC) {
4070 S = allocateFunctionDesc(S + A);
4075 /* No, so look up the name in our global table. */
4076 symbol = strtab + sym.st_name;
4077 S_tmp = lookupSymbol( symbol );
4078 S = (Elf_Addr)S_tmp;
4080 #ifdef ELF_FUNCTION_DESC
4081 /* If a function, already a function descriptor - we would
4082 have to copy it to add an offset. */
4083 if (S && (ELF_ST_TYPE(sym.st_info) == STT_FUNC) && (A != 0))
4084 errorBelch("%s: function %s with addend %p", oc->fileName, symbol, (void *)A);
4088 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
4091 IF_DEBUG(linker,debugBelch( "`%s' resolves to %p", symbol, (void*)S ));
4094 IF_DEBUG(linker,debugBelch("Reloc: P = %p S = %p A = %p\n",
4095 (void*)P, (void*)S, (void*)A ));
4096 /* checkProddableBlock ( oc, (void*)P ); */
4100 switch (ELF_R_TYPE(info)) {
4101 # if defined(sparc_HOST_ARCH)
4102 case R_SPARC_WDISP30:
4103 w1 = *pP & 0xC0000000;
4104 w2 = (Elf_Word)((value - P) >> 2);
4105 ASSERT((w2 & 0xC0000000) == 0);
4110 w1 = *pP & 0xFFC00000;
4111 w2 = (Elf_Word)(value >> 10);
4112 ASSERT((w2 & 0xFFC00000) == 0);
4118 w2 = (Elf_Word)(value & 0x3FF);
4119 ASSERT((w2 & ~0x3FF) == 0);
4124 /* According to the Sun documentation:
4126 This relocation type resembles R_SPARC_32, except it refers to an
4127 unaligned word. That is, the word to be relocated must be treated
4128 as four separate bytes with arbitrary alignment, not as a word
4129 aligned according to the architecture requirements.
4132 w2 = (Elf_Word)value;
4134 // SPARC doesn't do misaligned writes of 32 bit words,
4135 // so we have to do this one byte-at-a-time.
4136 char *pPc = (char*)pP;
4137 pPc[0] = (char) ((Elf_Word)(w2 & 0xff000000) >> 24);
4138 pPc[1] = (char) ((Elf_Word)(w2 & 0x00ff0000) >> 16);
4139 pPc[2] = (char) ((Elf_Word)(w2 & 0x0000ff00) >> 8);
4140 pPc[3] = (char) ((Elf_Word)(w2 & 0x000000ff));
4144 w2 = (Elf_Word)value;
4147 # elif defined(powerpc_HOST_ARCH)
4148 case R_PPC_ADDR16_LO:
4149 *(Elf32_Half*) P = value;
4152 case R_PPC_ADDR16_HI:
4153 *(Elf32_Half*) P = value >> 16;
4156 case R_PPC_ADDR16_HA:
4157 *(Elf32_Half*) P = (value + 0x8000) >> 16;
4161 *(Elf32_Word *) P = value;
4165 *(Elf32_Word *) P = value - P;
4171 if( delta << 6 >> 6 != delta )
4173 value = (Elf_Addr) (&makeSymbolExtra( oc, ELF_R_SYM(info), value )
4177 if( value == 0 || delta << 6 >> 6 != delta )
4179 barf( "Unable to make SymbolExtra for #%d",
4185 *(Elf_Word *) P = (*(Elf_Word *) P & 0xfc000003)
4186 | (delta & 0x3fffffc);
4190 #if x86_64_HOST_ARCH
4192 *(Elf64_Xword *)P = value;
4197 #if defined(ALWAYS_PIC)
4198 barf("R_X86_64_PC32 relocation, but ALWAYS_PIC.");
4200 StgInt64 off = value - P;
4201 if (off >= 0x7fffffffL || off < -0x80000000L) {
4202 #if X86_64_ELF_NONPIC_HACK
4203 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4205 off = pltAddress + A - P;
4207 barf("R_X86_64_PC32 relocation out of range: %s = %p\nRecompile %s with -fPIC.",
4208 symbol, off, oc->fileName );
4211 *(Elf64_Word *)P = (Elf64_Word)off;
4218 StgInt64 off = value - P;
4219 *(Elf64_Word *)P = (Elf64_Word)off;
4224 #if defined(ALWAYS_PIC)
4225 barf("R_X86_64_32 relocation, but ALWAYS_PIC.");
4227 if (value >= 0x7fffffffL) {
4228 #if X86_64_ELF_NONPIC_HACK
4229 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4231 value = pltAddress + A;
4233 barf("R_X86_64_32 relocation out of range: %s = %p\nRecompile %s with -fPIC.",
4234 symbol, value, oc->fileName );
4237 *(Elf64_Word *)P = (Elf64_Word)value;
4242 #if defined(ALWAYS_PIC)
4243 barf("R_X86_64_32S relocation, but ALWAYS_PIC.");
4245 if ((StgInt64)value > 0x7fffffffL || (StgInt64)value < -0x80000000L) {
4246 #if X86_64_ELF_NONPIC_HACK
4247 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4249 value = pltAddress + A;
4251 barf("R_X86_64_32S relocation out of range: %s = %p\nRecompile %s with -fPIC.",
4252 symbol, value, oc->fileName );
4255 *(Elf64_Sword *)P = (Elf64_Sword)value;
4259 case R_X86_64_GOTPCREL:
4261 StgInt64 gotAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)->addr;
4262 StgInt64 off = gotAddress + A - P;
4263 *(Elf64_Word *)P = (Elf64_Word)off;
4267 case R_X86_64_PLT32:
4269 #if defined(ALWAYS_PIC)
4270 barf("R_X86_64_PLT32 relocation, but ALWAYS_PIC.");
4272 StgInt64 off = value - P;
4273 if (off >= 0x7fffffffL || off < -0x80000000L) {
4274 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4276 off = pltAddress + A - P;
4278 *(Elf64_Word *)P = (Elf64_Word)off;
4285 errorBelch("%s: unhandled ELF relocation(RelA) type %lu\n",
4286 oc->fileName, (lnat)ELF_R_TYPE(info));
4295 ocResolve_ELF ( ObjectCode* oc )
4299 Elf_Sym* stab = NULL;
4300 char* ehdrC = (char*)(oc->image);
4301 Elf_Ehdr* ehdr = (Elf_Ehdr*) ehdrC;
4302 Elf_Shdr* shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
4304 /* first find "the" symbol table */
4305 stab = (Elf_Sym*) findElfSection ( ehdrC, SHT_SYMTAB );
4307 /* also go find the string table */
4308 strtab = findElfSection ( ehdrC, SHT_STRTAB );
4310 if (stab == NULL || strtab == NULL) {
4311 errorBelch("%s: can't find string or symbol table", oc->fileName);
4315 /* Process the relocation sections. */
4316 for (shnum = 0; shnum < ehdr->e_shnum; shnum++) {
4317 if (shdr[shnum].sh_type == SHT_REL) {
4318 ok = do_Elf_Rel_relocations ( oc, ehdrC, shdr,
4319 shnum, stab, strtab );
4323 if (shdr[shnum].sh_type == SHT_RELA) {
4324 ok = do_Elf_Rela_relocations ( oc, ehdrC, shdr,
4325 shnum, stab, strtab );
4330 #if defined(powerpc_HOST_ARCH)
4331 ocFlushInstructionCache( oc );
4338 * PowerPC & X86_64 ELF specifics
4341 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
4343 static int ocAllocateSymbolExtras_ELF( ObjectCode *oc )
4349 ehdr = (Elf_Ehdr *) oc->image;
4350 shdr = (Elf_Shdr *) ( ((char *)oc->image) + ehdr->e_shoff );
4352 for( i = 0; i < ehdr->e_shnum; i++ )
4353 if( shdr[i].sh_type == SHT_SYMTAB )
4356 if( i == ehdr->e_shnum )
4358 errorBelch( "This ELF file contains no symtab" );
4362 if( shdr[i].sh_entsize != sizeof( Elf_Sym ) )
4364 errorBelch( "The entry size (%d) of the symtab isn't %d\n",
4365 (int) shdr[i].sh_entsize, (int) sizeof( Elf_Sym ) );
4370 return ocAllocateSymbolExtras( oc, shdr[i].sh_size / sizeof( Elf_Sym ), 0 );
4373 #endif /* powerpc */
4377 /* --------------------------------------------------------------------------
4379 * ------------------------------------------------------------------------*/
4381 #if defined(OBJFORMAT_MACHO)
4384 Support for MachO linking on Darwin/MacOS X
4385 by Wolfgang Thaller (wolfgang.thaller@gmx.net)
4387 I hereby formally apologize for the hackish nature of this code.
4388 Things that need to be done:
4389 *) implement ocVerifyImage_MachO
4390 *) add still more sanity checks.
4393 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
4394 #define mach_header mach_header_64
4395 #define segment_command segment_command_64
4396 #define section section_64
4397 #define nlist nlist_64
4400 #ifdef powerpc_HOST_ARCH
4401 static int ocAllocateSymbolExtras_MachO(ObjectCode* oc)
4403 struct mach_header *header = (struct mach_header *) oc->image;
4404 struct load_command *lc = (struct load_command *) (header + 1);
4407 for( i = 0; i < header->ncmds; i++ )
4409 if( lc->cmd == LC_SYMTAB )
4411 // Find out the first and last undefined external
4412 // symbol, so we don't have to allocate too many
4414 struct symtab_command *symLC = (struct symtab_command *) lc;
4415 unsigned min = symLC->nsyms, max = 0;
4416 struct nlist *nlist =
4417 symLC ? (struct nlist*) ((char*) oc->image + symLC->symoff)
4419 for(i=0;i<symLC->nsyms;i++)
4421 if(nlist[i].n_type & N_STAB)
4423 else if(nlist[i].n_type & N_EXT)
4425 if((nlist[i].n_type & N_TYPE) == N_UNDF
4426 && (nlist[i].n_value == 0))
4436 return ocAllocateSymbolExtras(oc, max - min + 1, min);
4441 lc = (struct load_command *) ( ((char *)lc) + lc->cmdsize );
4443 return ocAllocateSymbolExtras(oc,0,0);
4446 #ifdef x86_64_HOST_ARCH
4447 static int ocAllocateSymbolExtras_MachO(ObjectCode* oc)
4449 struct mach_header *header = (struct mach_header *) oc->image;
4450 struct load_command *lc = (struct load_command *) (header + 1);
4453 for( i = 0; i < header->ncmds; i++ )
4455 if( lc->cmd == LC_SYMTAB )
4457 // Just allocate one entry for every symbol
4458 struct symtab_command *symLC = (struct symtab_command *) lc;
4460 return ocAllocateSymbolExtras(oc, symLC->nsyms, 0);
4463 lc = (struct load_command *) ( ((char *)lc) + lc->cmdsize );
4465 return ocAllocateSymbolExtras(oc,0,0);
4469 static int ocVerifyImage_MachO(ObjectCode* oc)
4471 char *image = (char*) oc->image;
4472 struct mach_header *header = (struct mach_header*) image;
4474 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
4475 if(header->magic != MH_MAGIC_64) {
4476 errorBelch("%s: Bad magic. Expected: %08x, got: %08x.\n",
4477 oc->fileName, MH_MAGIC_64, header->magic);
4481 if(header->magic != MH_MAGIC) {
4482 errorBelch("%s: Bad magic. Expected: %08x, got: %08x.\n",
4483 oc->fileName, MH_MAGIC, header->magic);
4487 // FIXME: do some more verifying here
4491 static int resolveImports(
4494 struct symtab_command *symLC,
4495 struct section *sect, // ptr to lazy or non-lazy symbol pointer section
4496 unsigned long *indirectSyms,
4497 struct nlist *nlist)
4500 size_t itemSize = 4;
4502 IF_DEBUG(linker, debugBelch("resolveImports: start\n"));
4505 int isJumpTable = 0;
4506 if(!strcmp(sect->sectname,"__jump_table"))
4510 ASSERT(sect->reserved2 == itemSize);
4514 for(i=0; i*itemSize < sect->size;i++)
4516 // according to otool, reserved1 contains the first index into the indirect symbol table
4517 struct nlist *symbol = &nlist[indirectSyms[sect->reserved1+i]];
4518 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4521 IF_DEBUG(linker, debugBelch("resolveImports: resolving %s\n", nm));
4522 if ((symbol->n_type & N_TYPE) == N_UNDF
4523 && (symbol->n_type & N_EXT) && (symbol->n_value != 0)) {
4524 addr = (void*) (symbol->n_value);
4525 IF_DEBUG(linker, debugBelch("resolveImports: undefined external %s has value %p\n", nm, addr));
4527 addr = lookupSymbol(nm);
4528 IF_DEBUG(linker, debugBelch("resolveImports: looking up %s, %p\n", nm, addr));
4532 errorBelch("\n%s: unknown symbol `%s'", oc->fileName, nm);
4540 checkProddableBlock(oc,image + sect->offset + i*itemSize);
4541 *(image + sect->offset + i*itemSize) = 0xe9; // jmp
4542 *(unsigned*)(image + sect->offset + i*itemSize + 1)
4543 = (char*)addr - (image + sect->offset + i*itemSize + 5);
4548 checkProddableBlock(oc,((void**)(image + sect->offset)) + i);
4549 ((void**)(image + sect->offset))[i] = addr;
4553 IF_DEBUG(linker, debugBelch("resolveImports: done\n"));
4557 static unsigned long relocateAddress(
4560 struct section* sections,
4561 unsigned long address)
4564 IF_DEBUG(linker, debugBelch("relocateAddress: start\n"));
4565 for (i = 0; i < nSections; i++)
4567 IF_DEBUG(linker, debugBelch(" relocating address in section %d\n", i));
4568 if (sections[i].addr <= address
4569 && address < sections[i].addr + sections[i].size)
4571 return (unsigned long)oc->image
4572 + sections[i].offset + address - sections[i].addr;
4575 barf("Invalid Mach-O file:"
4576 "Address out of bounds while relocating object file");
4580 static int relocateSection(
4583 struct symtab_command *symLC, struct nlist *nlist,
4584 int nSections, struct section* sections, struct section *sect)
4586 struct relocation_info *relocs;
4589 IF_DEBUG(linker, debugBelch("relocateSection: start\n"));
4591 if(!strcmp(sect->sectname,"__la_symbol_ptr"))
4593 else if(!strcmp(sect->sectname,"__nl_symbol_ptr"))
4595 else if(!strcmp(sect->sectname,"__la_sym_ptr2"))
4597 else if(!strcmp(sect->sectname,"__la_sym_ptr3"))
4601 IF_DEBUG(linker, debugBelch("relocateSection: number of relocations: %d\n", n));
4603 relocs = (struct relocation_info*) (image + sect->reloff);
4607 #ifdef x86_64_HOST_ARCH
4608 struct relocation_info *reloc = &relocs[i];
4610 char *thingPtr = image + sect->offset + reloc->r_address;
4612 /* We shouldn't need to initialise this, but gcc on OS X 64 bit
4613 complains that it may be used uninitialized if we don't */
4616 int type = reloc->r_type;
4618 checkProddableBlock(oc,thingPtr);
4619 switch(reloc->r_length)
4622 thing = *(uint8_t*)thingPtr;
4623 baseValue = (uint64_t)thingPtr + 1;
4626 thing = *(uint16_t*)thingPtr;
4627 baseValue = (uint64_t)thingPtr + 2;
4630 thing = *(uint32_t*)thingPtr;
4631 baseValue = (uint64_t)thingPtr + 4;
4634 thing = *(uint64_t*)thingPtr;
4635 baseValue = (uint64_t)thingPtr + 8;
4638 barf("Unknown size.");
4642 debugBelch("relocateSection: length = %d, thing = %d, baseValue = %p\n",
4643 reloc->r_length, thing, baseValue));
4645 if (type == X86_64_RELOC_GOT
4646 || type == X86_64_RELOC_GOT_LOAD)
4648 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4649 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4651 IF_DEBUG(linker, debugBelch("relocateSection: making jump island for %s, extern = %d, X86_64_RELOC_GOT\n", nm, reloc->r_extern));
4652 ASSERT(reloc->r_extern);
4653 value = (uint64_t) &makeSymbolExtra(oc, reloc->r_symbolnum, (unsigned long)lookupSymbol(nm))->addr;
4655 type = X86_64_RELOC_SIGNED;
4657 else if(reloc->r_extern)
4659 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4660 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4662 IF_DEBUG(linker, debugBelch("relocateSection: looking up external symbol %s\n", nm));
4663 IF_DEBUG(linker, debugBelch(" : type = %d\n", symbol->n_type));
4664 IF_DEBUG(linker, debugBelch(" : sect = %d\n", symbol->n_sect));
4665 IF_DEBUG(linker, debugBelch(" : desc = %d\n", symbol->n_desc));
4666 IF_DEBUG(linker, debugBelch(" : value = %d\n", symbol->n_value));
4667 if ((symbol->n_type & N_TYPE) == N_SECT) {
4668 value = relocateAddress(oc, nSections, sections,
4670 IF_DEBUG(linker, debugBelch("relocateSection, defined external symbol %s, relocated address %p\n", nm, value));
4673 value = (uint64_t) lookupSymbol(nm);
4674 IF_DEBUG(linker, debugBelch("relocateSection: external symbol %s, address %p\n", nm, value));
4679 value = sections[reloc->r_symbolnum-1].offset
4680 - sections[reloc->r_symbolnum-1].addr
4684 IF_DEBUG(linker, debugBelch("relocateSection: value = %p\n", value));
4686 if (type == X86_64_RELOC_BRANCH)
4688 if((int32_t)(value - baseValue) != (int64_t)(value - baseValue))
4690 ASSERT(reloc->r_extern);
4691 value = (uint64_t) &makeSymbolExtra(oc, reloc->r_symbolnum, value)
4694 ASSERT((int32_t)(value - baseValue) == (int64_t)(value - baseValue));
4695 type = X86_64_RELOC_SIGNED;
4700 case X86_64_RELOC_UNSIGNED:
4701 ASSERT(!reloc->r_pcrel);
4704 case X86_64_RELOC_SIGNED:
4705 case X86_64_RELOC_SIGNED_1:
4706 case X86_64_RELOC_SIGNED_2:
4707 case X86_64_RELOC_SIGNED_4:
4708 ASSERT(reloc->r_pcrel);
4709 thing += value - baseValue;
4711 case X86_64_RELOC_SUBTRACTOR:
4712 ASSERT(!reloc->r_pcrel);
4716 barf("unkown relocation");
4719 switch(reloc->r_length)
4722 *(uint8_t*)thingPtr = thing;
4725 *(uint16_t*)thingPtr = thing;
4728 *(uint32_t*)thingPtr = thing;
4731 *(uint64_t*)thingPtr = thing;
4735 if(relocs[i].r_address & R_SCATTERED)
4737 struct scattered_relocation_info *scat =
4738 (struct scattered_relocation_info*) &relocs[i];
4742 if(scat->r_length == 2)
4744 unsigned long word = 0;
4745 unsigned long* wordPtr = (unsigned long*) (image + sect->offset + scat->r_address);
4746 checkProddableBlock(oc,wordPtr);
4748 // Note on relocation types:
4749 // i386 uses the GENERIC_RELOC_* types,
4750 // while ppc uses special PPC_RELOC_* types.
4751 // *_RELOC_VANILLA and *_RELOC_PAIR have the same value
4752 // in both cases, all others are different.
4753 // Therefore, we use GENERIC_RELOC_VANILLA
4754 // and GENERIC_RELOC_PAIR instead of the PPC variants,
4755 // and use #ifdefs for the other types.
4757 // Step 1: Figure out what the relocated value should be
4758 if(scat->r_type == GENERIC_RELOC_VANILLA)
4760 word = *wordPtr + (unsigned long) relocateAddress(
4767 #ifdef powerpc_HOST_ARCH
4768 else if(scat->r_type == PPC_RELOC_SECTDIFF
4769 || scat->r_type == PPC_RELOC_LO16_SECTDIFF
4770 || scat->r_type == PPC_RELOC_HI16_SECTDIFF
4771 || scat->r_type == PPC_RELOC_HA16_SECTDIFF
4772 || scat->r_type == PPC_RELOC_LOCAL_SECTDIFF)
4774 else if(scat->r_type == GENERIC_RELOC_SECTDIFF
4775 || scat->r_type == GENERIC_RELOC_LOCAL_SECTDIFF)
4778 struct scattered_relocation_info *pair =
4779 (struct scattered_relocation_info*) &relocs[i+1];
4781 if(!pair->r_scattered || pair->r_type != GENERIC_RELOC_PAIR)
4782 barf("Invalid Mach-O file: "
4783 "RELOC_*_SECTDIFF not followed by RELOC_PAIR");
4785 word = (unsigned long)
4786 (relocateAddress(oc, nSections, sections, scat->r_value)
4787 - relocateAddress(oc, nSections, sections, pair->r_value));
4790 #ifdef powerpc_HOST_ARCH
4791 else if(scat->r_type == PPC_RELOC_HI16
4792 || scat->r_type == PPC_RELOC_LO16
4793 || scat->r_type == PPC_RELOC_HA16
4794 || scat->r_type == PPC_RELOC_LO14)
4795 { // these are generated by label+offset things
4796 struct relocation_info *pair = &relocs[i+1];
4797 if((pair->r_address & R_SCATTERED) || pair->r_type != PPC_RELOC_PAIR)
4798 barf("Invalid Mach-O file: "
4799 "PPC_RELOC_* not followed by PPC_RELOC_PAIR");
4801 if(scat->r_type == PPC_RELOC_LO16)
4803 word = ((unsigned short*) wordPtr)[1];
4804 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4806 else if(scat->r_type == PPC_RELOC_LO14)
4808 barf("Unsupported Relocation: PPC_RELOC_LO14");
4809 word = ((unsigned short*) wordPtr)[1] & 0xFFFC;
4810 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4812 else if(scat->r_type == PPC_RELOC_HI16)
4814 word = ((unsigned short*) wordPtr)[1] << 16;
4815 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF);
4817 else if(scat->r_type == PPC_RELOC_HA16)
4819 word = ((unsigned short*) wordPtr)[1] << 16;
4820 word += ((short)relocs[i+1].r_address & (short)0xFFFF);
4824 word += (unsigned long) relocateAddress(oc, nSections, sections, scat->r_value)
4832 barf ("Don't know how to handle this Mach-O "
4833 "scattered relocation entry: "
4834 "object file %s; entry type %ld; "
4836 OC_INFORMATIVE_FILENAME(oc),
4842 #ifdef powerpc_HOST_ARCH
4843 if(scat->r_type == GENERIC_RELOC_VANILLA
4844 || scat->r_type == PPC_RELOC_SECTDIFF)
4846 if(scat->r_type == GENERIC_RELOC_VANILLA
4847 || scat->r_type == GENERIC_RELOC_SECTDIFF
4848 || scat->r_type == GENERIC_RELOC_LOCAL_SECTDIFF)
4853 #ifdef powerpc_HOST_ARCH
4854 else if(scat->r_type == PPC_RELOC_LO16_SECTDIFF || scat->r_type == PPC_RELOC_LO16)
4856 ((unsigned short*) wordPtr)[1] = word & 0xFFFF;
4858 else if(scat->r_type == PPC_RELOC_HI16_SECTDIFF || scat->r_type == PPC_RELOC_HI16)
4860 ((unsigned short*) wordPtr)[1] = (word >> 16) & 0xFFFF;
4862 else if(scat->r_type == PPC_RELOC_HA16_SECTDIFF || scat->r_type == PPC_RELOC_HA16)
4864 ((unsigned short*) wordPtr)[1] = ((word >> 16) & 0xFFFF)
4865 + ((word & (1<<15)) ? 1 : 0);
4871 barf("Can't handle Mach-O scattered relocation entry "
4872 "with this r_length tag: "
4873 "object file %s; entry type %ld; "
4874 "r_length tag %ld; address %#lx\n",
4875 OC_INFORMATIVE_FILENAME(oc),
4882 else /* scat->r_pcrel */
4884 barf("Don't know how to handle *PC-relative* Mach-O "
4885 "scattered relocation entry: "
4886 "object file %s; entry type %ld; address %#lx\n",
4887 OC_INFORMATIVE_FILENAME(oc),
4894 else /* !(relocs[i].r_address & R_SCATTERED) */
4896 struct relocation_info *reloc = &relocs[i];
4897 if(reloc->r_pcrel && !reloc->r_extern)
4900 if(reloc->r_length == 2)
4902 unsigned long word = 0;
4903 #ifdef powerpc_HOST_ARCH
4904 unsigned long jumpIsland = 0;
4905 long offsetToJumpIsland = 0xBADBAD42; // initialise to bad value
4906 // to avoid warning and to catch
4910 unsigned long* wordPtr = (unsigned long*) (image + sect->offset + reloc->r_address);
4911 checkProddableBlock(oc,wordPtr);
4913 if(reloc->r_type == GENERIC_RELOC_VANILLA)
4917 #ifdef powerpc_HOST_ARCH
4918 else if(reloc->r_type == PPC_RELOC_LO16)
4920 word = ((unsigned short*) wordPtr)[1];
4921 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4923 else if(reloc->r_type == PPC_RELOC_HI16)
4925 word = ((unsigned short*) wordPtr)[1] << 16;
4926 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF);
4928 else if(reloc->r_type == PPC_RELOC_HA16)
4930 word = ((unsigned short*) wordPtr)[1] << 16;
4931 word += ((short)relocs[i+1].r_address & (short)0xFFFF);
4933 else if(reloc->r_type == PPC_RELOC_BR24)
4936 word = (word & 0x03FFFFFC) | ((word & 0x02000000) ? 0xFC000000 : 0);
4941 barf("Can't handle this Mach-O relocation entry "
4943 "object file %s; entry type %ld; address %#lx\n",
4944 OC_INFORMATIVE_FILENAME(oc),
4950 if(!reloc->r_extern)
4953 sections[reloc->r_symbolnum-1].offset
4954 - sections[reloc->r_symbolnum-1].addr
4961 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4962 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4963 void *symbolAddress = lookupSymbol(nm);
4966 errorBelch("\nunknown symbol `%s'", nm);
4972 #ifdef powerpc_HOST_ARCH
4973 // In the .o file, this should be a relative jump to NULL
4974 // and we'll change it to a relative jump to the symbol
4975 ASSERT(word + reloc->r_address == 0);
4976 jumpIsland = (unsigned long)
4977 &makeSymbolExtra(oc,
4979 (unsigned long) symbolAddress)
4983 offsetToJumpIsland = word + jumpIsland
4984 - (((long)image) + sect->offset - sect->addr);
4987 word += (unsigned long) symbolAddress
4988 - (((long)image) + sect->offset - sect->addr);
4992 word += (unsigned long) symbolAddress;
4996 if(reloc->r_type == GENERIC_RELOC_VANILLA)
5001 #ifdef powerpc_HOST_ARCH
5002 else if(reloc->r_type == PPC_RELOC_LO16)
5004 ((unsigned short*) wordPtr)[1] = word & 0xFFFF;
5007 else if(reloc->r_type == PPC_RELOC_HI16)
5009 ((unsigned short*) wordPtr)[1] = (word >> 16) & 0xFFFF;
5012 else if(reloc->r_type == PPC_RELOC_HA16)
5014 ((unsigned short*) wordPtr)[1] = ((word >> 16) & 0xFFFF)
5015 + ((word & (1<<15)) ? 1 : 0);
5018 else if(reloc->r_type == PPC_RELOC_BR24)
5020 if((word & 0x03) != 0)
5021 barf("%s: unconditional relative branch with a displacement "
5022 "which isn't a multiple of 4 bytes: %#lx",
5023 OC_INFORMATIVE_FILENAME(oc),
5026 if((word & 0xFE000000) != 0xFE000000 &&
5027 (word & 0xFE000000) != 0x00000000)
5029 // The branch offset is too large.
5030 // Therefore, we try to use a jump island.
5033 barf("%s: unconditional relative branch out of range: "
5034 "no jump island available: %#lx",
5035 OC_INFORMATIVE_FILENAME(oc),
5039 word = offsetToJumpIsland;
5040 if((word & 0xFE000000) != 0xFE000000 &&
5041 (word & 0xFE000000) != 0x00000000)
5042 barf("%s: unconditional relative branch out of range: "
5043 "jump island out of range: %#lx",
5044 OC_INFORMATIVE_FILENAME(oc),
5047 *wordPtr = (*wordPtr & 0xFC000003) | (word & 0x03FFFFFC);
5054 barf("Can't handle Mach-O relocation entry (not scattered) "
5055 "with this r_length tag: "
5056 "object file %s; entry type %ld; "
5057 "r_length tag %ld; address %#lx\n",
5058 OC_INFORMATIVE_FILENAME(oc),
5067 IF_DEBUG(linker, debugBelch("relocateSection: done\n"));
5071 static int ocGetNames_MachO(ObjectCode* oc)
5073 char *image = (char*) oc->image;
5074 struct mach_header *header = (struct mach_header*) image;
5075 struct load_command *lc = (struct load_command*) (image + sizeof(struct mach_header));
5076 unsigned i,curSymbol = 0;
5077 struct segment_command *segLC = NULL;
5078 struct section *sections;
5079 struct symtab_command *symLC = NULL;
5080 struct nlist *nlist;
5081 unsigned long commonSize = 0;
5082 char *commonStorage = NULL;
5083 unsigned long commonCounter;
5085 IF_DEBUG(linker,debugBelch("ocGetNames_MachO: start\n"));
5087 for(i=0;i<header->ncmds;i++)
5089 if(lc->cmd == LC_SEGMENT || lc->cmd == LC_SEGMENT_64)
5090 segLC = (struct segment_command*) lc;
5091 else if(lc->cmd == LC_SYMTAB)
5092 symLC = (struct symtab_command*) lc;
5093 lc = (struct load_command *) ( ((char*)lc) + lc->cmdsize );
5096 sections = (struct section*) (segLC+1);
5097 nlist = symLC ? (struct nlist*) (image + symLC->symoff)
5101 barf("ocGetNames_MachO: no segment load command");
5103 for(i=0;i<segLC->nsects;i++)
5105 IF_DEBUG(linker, debugBelch("ocGetNames_MachO: segment %d\n", i));
5106 if (sections[i].size == 0)
5109 if((sections[i].flags & SECTION_TYPE) == S_ZEROFILL)
5111 char * zeroFillArea = stgCallocBytes(1,sections[i].size,
5112 "ocGetNames_MachO(common symbols)");
5113 sections[i].offset = zeroFillArea - image;
5116 if(!strcmp(sections[i].sectname,"__text"))
5117 addSection(oc, SECTIONKIND_CODE_OR_RODATA,
5118 (void*) (image + sections[i].offset),
5119 (void*) (image + sections[i].offset + sections[i].size));
5120 else if(!strcmp(sections[i].sectname,"__const"))
5121 addSection(oc, SECTIONKIND_RWDATA,
5122 (void*) (image + sections[i].offset),
5123 (void*) (image + sections[i].offset + sections[i].size));
5124 else if(!strcmp(sections[i].sectname,"__data"))
5125 addSection(oc, SECTIONKIND_RWDATA,
5126 (void*) (image + sections[i].offset),
5127 (void*) (image + sections[i].offset + sections[i].size));
5128 else if(!strcmp(sections[i].sectname,"__bss")
5129 || !strcmp(sections[i].sectname,"__common"))
5130 addSection(oc, SECTIONKIND_RWDATA,
5131 (void*) (image + sections[i].offset),
5132 (void*) (image + sections[i].offset + sections[i].size));
5134 addProddableBlock(oc, (void*) (image + sections[i].offset),
5138 // count external symbols defined here
5142 for(i=0;i<symLC->nsyms;i++)
5144 if(nlist[i].n_type & N_STAB)
5146 else if(nlist[i].n_type & N_EXT)
5148 if((nlist[i].n_type & N_TYPE) == N_UNDF
5149 && (nlist[i].n_value != 0))
5151 commonSize += nlist[i].n_value;
5154 else if((nlist[i].n_type & N_TYPE) == N_SECT)
5159 IF_DEBUG(linker, debugBelch("ocGetNames_MachO: %d external symbols\n", oc->n_symbols));
5160 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
5161 "ocGetNames_MachO(oc->symbols)");
5165 for(i=0;i<symLC->nsyms;i++)
5167 if(nlist[i].n_type & N_STAB)
5169 else if((nlist[i].n_type & N_TYPE) == N_SECT)
5171 if(nlist[i].n_type & N_EXT)
5173 char *nm = image + symLC->stroff + nlist[i].n_un.n_strx;
5174 if ((nlist[i].n_desc & N_WEAK_DEF) && lookupSymbol(nm)) {
5175 // weak definition, and we already have a definition
5176 IF_DEBUG(linker, debugBelch(" weak: %s\n", nm));
5180 IF_DEBUG(linker, debugBelch("ocGetNames_MachO: inserting %s\n", nm));
5181 ghciInsertStrHashTable(oc->fileName, symhash, nm,
5183 + sections[nlist[i].n_sect-1].offset
5184 - sections[nlist[i].n_sect-1].addr
5185 + nlist[i].n_value);
5186 oc->symbols[curSymbol++] = nm;
5193 commonStorage = stgCallocBytes(1,commonSize,"ocGetNames_MachO(common symbols)");
5194 commonCounter = (unsigned long)commonStorage;
5197 for(i=0;i<symLC->nsyms;i++)
5199 if((nlist[i].n_type & N_TYPE) == N_UNDF
5200 && (nlist[i].n_type & N_EXT) && (nlist[i].n_value != 0))
5202 char *nm = image + symLC->stroff + nlist[i].n_un.n_strx;
5203 unsigned long sz = nlist[i].n_value;
5205 nlist[i].n_value = commonCounter;
5207 IF_DEBUG(linker, debugBelch("ocGetNames_MachO: inserting common symbol: %s\n", nm));
5208 ghciInsertStrHashTable(oc->fileName, symhash, nm,
5209 (void*)commonCounter);
5210 oc->symbols[curSymbol++] = nm;
5212 commonCounter += sz;
5219 static int ocResolve_MachO(ObjectCode* oc)
5221 char *image = (char*) oc->image;
5222 struct mach_header *header = (struct mach_header*) image;
5223 struct load_command *lc = (struct load_command*) (image + sizeof(struct mach_header));
5225 struct segment_command *segLC = NULL;
5226 struct section *sections;
5227 struct symtab_command *symLC = NULL;
5228 struct dysymtab_command *dsymLC = NULL;
5229 struct nlist *nlist;
5231 IF_DEBUG(linker, debugBelch("ocResolve_MachO: start\n"));
5232 for (i = 0; i < header->ncmds; i++)
5234 if(lc->cmd == LC_SEGMENT || lc->cmd == LC_SEGMENT_64)
5235 segLC = (struct segment_command*) lc;
5236 else if(lc->cmd == LC_SYMTAB)
5237 symLC = (struct symtab_command*) lc;
5238 else if(lc->cmd == LC_DYSYMTAB)
5239 dsymLC = (struct dysymtab_command*) lc;
5240 lc = (struct load_command *) ( ((char*)lc) + lc->cmdsize );
5243 sections = (struct section*) (segLC+1);
5244 nlist = symLC ? (struct nlist*) (image + symLC->symoff)
5249 unsigned long *indirectSyms
5250 = (unsigned long*) (image + dsymLC->indirectsymoff);
5252 IF_DEBUG(linker, debugBelch("ocResolve_MachO: resolving dsymLC\n"));
5253 for (i = 0; i < segLC->nsects; i++)
5255 if( !strcmp(sections[i].sectname,"__la_symbol_ptr")
5256 || !strcmp(sections[i].sectname,"__la_sym_ptr2")
5257 || !strcmp(sections[i].sectname,"__la_sym_ptr3"))
5259 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
5262 else if(!strcmp(sections[i].sectname,"__nl_symbol_ptr")
5263 || !strcmp(sections[i].sectname,"__pointers"))
5265 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
5268 else if(!strcmp(sections[i].sectname,"__jump_table"))
5270 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
5275 IF_DEBUG(linker, debugBelch("ocResolve_MachO: unknown section\n"));
5280 for(i=0;i<segLC->nsects;i++)
5282 IF_DEBUG(linker, debugBelch("ocResolve_MachO: relocating section %d\n", i));
5284 if (!relocateSection(oc,image,symLC,nlist,segLC->nsects,sections,§ions[i]))
5288 #if defined (powerpc_HOST_ARCH)
5289 ocFlushInstructionCache( oc );
5295 #ifdef powerpc_HOST_ARCH
5297 * The Mach-O object format uses leading underscores. But not everywhere.
5298 * There is a small number of runtime support functions defined in
5299 * libcc_dynamic.a whose name does not have a leading underscore.
5300 * As a consequence, we can't get their address from C code.
5301 * We have to use inline assembler just to take the address of a function.
5305 extern void* symbolsWithoutUnderscore[];
5307 static void machoInitSymbolsWithoutUnderscore()
5309 void **p = symbolsWithoutUnderscore;
5310 __asm__ volatile(".globl _symbolsWithoutUnderscore\n.data\n_symbolsWithoutUnderscore:");
5312 #undef SymI_NeedsProto
5313 #define SymI_NeedsProto(x) \
5314 __asm__ volatile(".long " # x);
5316 RTS_MACHO_NOUNDERLINE_SYMBOLS
5318 __asm__ volatile(".text");
5320 #undef SymI_NeedsProto
5321 #define SymI_NeedsProto(x) \
5322 ghciInsertStrHashTable("(GHCi built-in symbols)", symhash, #x, *p++);
5324 RTS_MACHO_NOUNDERLINE_SYMBOLS
5326 #undef SymI_NeedsProto
5332 * Figure out by how much to shift the entire Mach-O file in memory
5333 * when loading so that its single segment ends up 16-byte-aligned
5335 static int machoGetMisalignment( FILE * f )
5337 struct mach_header header;
5341 int n = fread(&header, sizeof(header), 1, f);
5343 barf("machoGetMisalignment: can't read the Mach-O header");
5346 fseek(f, -sizeof(header), SEEK_CUR);
5348 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
5349 if(header.magic != MH_MAGIC_64) {
5350 barf("Bad magic. Expected: %08x, got: %08x.",
5351 MH_MAGIC_64, header.magic);
5354 if(header.magic != MH_MAGIC) {
5355 barf("Bad magic. Expected: %08x, got: %08x.",
5356 MH_MAGIC, header.magic);
5360 misalignment = (header.sizeofcmds + sizeof(header))
5363 return misalignment ? (16 - misalignment) : 0;