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;
1689 IF_DEBUG(linker, debugBelch("loadArchive: Loading archive `%s'\n", path));
1691 gnuFileIndex = NULL;
1692 gnuFileIndexSize = 0;
1695 fileName = stgMallocBytes(fileNameSize, "loadArchive(fileName)");
1697 f = fopen(path, "rb");
1699 barf("loadObj: can't read `%s'", path);
1701 n = fread ( tmp, 1, 8, f );
1702 if (strncmp(tmp, "!<arch>\n", 8) != 0)
1703 barf("loadArchive: Not an archive: `%s'", path);
1706 n = fread ( fileName, 1, 16, f );
1712 barf("loadArchive: Failed reading file name from `%s'", path);
1715 n = fread ( tmp, 1, 12, f );
1717 barf("loadArchive: Failed reading mod time from `%s'", path);
1718 n = fread ( tmp, 1, 6, f );
1720 barf("loadArchive: Failed reading owner from `%s'", path);
1721 n = fread ( tmp, 1, 6, f );
1723 barf("loadArchive: Failed reading group from `%s'", path);
1724 n = fread ( tmp, 1, 8, f );
1726 barf("loadArchive: Failed reading mode from `%s'", path);
1727 n = fread ( tmp, 1, 10, f );
1729 barf("loadArchive: Failed reading size from `%s'", path);
1731 for (n = 0; isdigit(tmp[n]); n++);
1733 memberSize = atoi(tmp);
1734 n = fread ( tmp, 1, 2, f );
1735 if (strncmp(tmp, "\x60\x0A", 2) != 0)
1736 barf("loadArchive: Failed reading magic from `%s' at %ld. Got %c%c",
1737 path, ftell(f), tmp[0], tmp[1]);
1740 /* Check for BSD-variant large filenames */
1741 if (0 == strncmp(fileName, "#1/", 3)) {
1742 fileName[16] = '\0';
1743 if (isdigit(fileName[3])) {
1744 for (n = 4; isdigit(fileName[n]); n++);
1746 thisFileNameSize = atoi(fileName + 3);
1747 memberSize -= thisFileNameSize;
1748 if (thisFileNameSize >= fileNameSize) {
1749 /* Double it to avoid potentially continually
1750 increasing it by 1 */
1751 fileNameSize = thisFileNameSize * 2;
1752 fileName = stgReallocBytes(fileName, fileNameSize, "loadArchive(fileName)");
1754 n = fread ( fileName, 1, thisFileNameSize, f );
1755 if (n != (int)thisFileNameSize) {
1756 barf("loadArchive: Failed reading filename from `%s'",
1759 fileName[thisFileNameSize] = 0;
1762 barf("loadArchive: BSD-variant filename size not found while reading filename from `%s'", path);
1765 /* Check for GNU file index file */
1766 else if (0 == strncmp(fileName, "//", 2)) {
1768 thisFileNameSize = 0;
1771 /* Check for a file in the GNU file index */
1772 else if (fileName[0] == '/') {
1773 if (isdigit(fileName[1])) {
1776 for (n = 2; isdigit(fileName[n]); n++);
1778 n = atoi(fileName + 1);
1780 if (gnuFileIndex == NULL) {
1781 barf("loadArchive: GNU-variant filename without an index while reading from `%s'", path);
1783 if (n < 0 || n > gnuFileIndexSize) {
1784 barf("loadArchive: GNU-variant filename offset %d out of range [0..%d] while reading filename from `%s'", n, gnuFileIndexSize, path);
1786 if (n != 0 && gnuFileIndex[n - 1] != '\n') {
1787 barf("loadArchive: GNU-variant filename offset %d invalid (range [0..%d]) while reading filename from `%s'", n, gnuFileIndexSize, path);
1789 for (i = n; gnuFileIndex[i] != '/'; i++);
1790 thisFileNameSize = i - n;
1791 if (thisFileNameSize >= fileNameSize) {
1792 /* Double it to avoid potentially continually
1793 increasing it by 1 */
1794 fileNameSize = thisFileNameSize * 2;
1795 fileName = stgReallocBytes(fileName, fileNameSize, "loadArchive(fileName)");
1797 memcpy(fileName, gnuFileIndex + n, thisFileNameSize);
1798 fileName[thisFileNameSize] = '\0';
1800 else if (fileName[1] == ' ') {
1802 thisFileNameSize = 0;
1805 barf("loadArchive: GNU-variant filename offset not found while reading filename from `%s'", path);
1808 /* Finally, the case where the filename field actually contains
1811 /* GNU ar terminates filenames with a '/', this allowing
1812 spaces in filenames. So first look to see if there is a
1814 for (thisFileNameSize = 0;
1815 thisFileNameSize < 16;
1816 thisFileNameSize++) {
1817 if (fileName[thisFileNameSize] == '/') {
1818 fileName[thisFileNameSize] = '\0';
1822 /* If we didn't find a '/', then a space teminates the
1823 filename. Note that if we don't find one, then
1824 thisFileNameSize ends up as 16, and we already have the
1826 if (thisFileNameSize == 16) {
1827 for (thisFileNameSize = 0;
1828 thisFileNameSize < 16;
1829 thisFileNameSize++) {
1830 if (fileName[thisFileNameSize] == ' ') {
1831 fileName[thisFileNameSize] = '\0';
1839 debugBelch("loadArchive: Found member file `%s'\n", fileName));
1841 isObject = thisFileNameSize >= 2
1842 && fileName[thisFileNameSize - 2] == '.'
1843 && fileName[thisFileNameSize - 1] == 'o';
1846 char *archiveMemberName;
1848 IF_DEBUG(linker, debugBelch("loadArchive: Member is an object file...loading...\n"));
1850 /* We can't mmap from the archive directly, as object
1851 files need to be 8-byte aligned but files in .ar
1852 archives are 2-byte aligned. When possible we use mmap
1853 to get some anonymous memory, as on 64-bit platforms if
1854 we use malloc then we can be given memory above 2^32.
1855 In the mmap case we're probably wasting lots of space;
1856 we could do better. */
1858 image = mmapForLinker(memberSize, MAP_ANONYMOUS, -1);
1860 image = stgMallocBytes(memberSize, "loadArchive(image)");
1862 n = fread ( image, 1, memberSize, f );
1863 if (n != memberSize) {
1864 barf("loadArchive: error whilst reading `%s'", path);
1867 archiveMemberName = stgMallocBytes(strlen(path) + thisFileNameSize + 3,
1868 "loadArchive(file)");
1869 sprintf(archiveMemberName, "%s(%.*s)",
1870 path, (int)thisFileNameSize, fileName);
1872 oc = mkOc(path, image, memberSize, archiveMemberName
1874 #ifdef darwin_HOST_OS
1880 stgFree(archiveMemberName);
1882 if (0 == loadOc(oc)) {
1887 else if (isGnuIndex) {
1888 if (gnuFileIndex != NULL) {
1889 barf("loadArchive: GNU-variant index found, but already have an index, while reading filename from `%s'", path);
1891 IF_DEBUG(linker, debugBelch("loadArchive: Found GNU-variant file index\n"));
1893 gnuFileIndex = mmapForLinker(memberSize + 1, MAP_ANONYMOUS, -1);
1895 gnuFileIndex = stgMallocBytes(memberSize + 1, "loadArchive(image)");
1897 n = fread ( gnuFileIndex, 1, memberSize, f );
1898 if (n != memberSize) {
1899 barf("loadArchive: error whilst reading `%s'", path);
1901 gnuFileIndex[memberSize] = '/';
1902 gnuFileIndexSize = memberSize;
1905 n = fseek(f, memberSize, SEEK_CUR);
1907 barf("loadArchive: error whilst seeking by %d in `%s'",
1910 /* .ar files are 2-byte aligned */
1911 if (memberSize % 2) {
1912 n = fread ( tmp, 1, 1, f );
1918 barf("loadArchive: Failed reading padding from `%s'", path);
1927 if (gnuFileIndex != NULL) {
1929 munmap(gnuFileIndex, gnuFileIndexSize + 1);
1931 stgFree(gnuFileIndex);
1938 /* -----------------------------------------------------------------------------
1939 * Load an obj (populate the global symbol table, but don't resolve yet)
1941 * Returns: 1 if ok, 0 on error.
1944 loadObj( char *path )
1956 IF_DEBUG(linker, debugBelch("loadObj %s\n", path));
1960 /* debugBelch("loadObj %s\n", path ); */
1962 /* Check that we haven't already loaded this object.
1963 Ignore requests to load multiple times */
1967 for (o = objects; o; o = o->next) {
1968 if (0 == strcmp(o->fileName, path)) {
1970 break; /* don't need to search further */
1974 IF_DEBUG(linker, debugBelch(
1975 "GHCi runtime linker: warning: looks like you're trying to load the\n"
1976 "same object file twice:\n"
1978 "GHCi will ignore this, but be warned.\n"
1980 return 1; /* success */
1984 r = stat(path, &st);
1986 IF_DEBUG(linker, debugBelch("File doesn't exist\n"));
1990 fileSize = st.st_size;
1993 /* On many architectures malloc'd memory isn't executable, so we need to use mmap. */
1995 #if defined(openbsd_HOST_OS)
1996 fd = open(path, O_RDONLY, S_IRUSR);
1998 fd = open(path, O_RDONLY);
2001 barf("loadObj: can't open `%s'", path);
2003 image = mmapForLinker(fileSize, 0, fd);
2007 #else /* !USE_MMAP */
2008 /* load the image into memory */
2009 f = fopen(path, "rb");
2011 barf("loadObj: can't read `%s'", path);
2013 # if defined(mingw32_HOST_OS)
2014 // TODO: We would like to use allocateExec here, but allocateExec
2015 // cannot currently allocate blocks large enough.
2016 image = VirtualAlloc(NULL, fileSize, MEM_RESERVE | MEM_COMMIT,
2017 PAGE_EXECUTE_READWRITE);
2018 # elif defined(darwin_HOST_OS)
2019 // In a Mach-O .o file, all sections can and will be misaligned
2020 // if the total size of the headers is not a multiple of the
2021 // desired alignment. This is fine for .o files that only serve
2022 // as input for the static linker, but it's not fine for us,
2023 // as SSE (used by gcc for floating point) and Altivec require
2024 // 16-byte alignment.
2025 // We calculate the correct alignment from the header before
2026 // reading the file, and then we misalign image on purpose so
2027 // that the actual sections end up aligned again.
2028 misalignment = machoGetMisalignment(f);
2029 image = stgMallocBytes(fileSize + misalignment, "loadObj(image)");
2030 image += misalignment;
2032 image = stgMallocBytes(fileSize, "loadObj(image)");
2037 n = fread ( image, 1, fileSize, f );
2039 barf("loadObj: error whilst reading `%s'", path);
2042 #endif /* USE_MMAP */
2044 oc = mkOc(path, image, fileSize, NULL
2046 #ifdef darwin_HOST_OS
2056 loadOc( ObjectCode* oc ) {
2059 IF_DEBUG(linker, debugBelch("loadOc\n"));
2061 # if defined(OBJFORMAT_MACHO) && (defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH))
2062 r = ocAllocateSymbolExtras_MachO ( oc );
2064 IF_DEBUG(linker, debugBelch("ocAllocateSymbolExtras_MachO failed\n"));
2067 # elif defined(OBJFORMAT_ELF) && (defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH))
2068 r = ocAllocateSymbolExtras_ELF ( oc );
2070 IF_DEBUG(linker, debugBelch("ocAllocateSymbolExtras_ELF failed\n"));
2075 /* verify the in-memory image */
2076 # if defined(OBJFORMAT_ELF)
2077 r = ocVerifyImage_ELF ( oc );
2078 # elif defined(OBJFORMAT_PEi386)
2079 r = ocVerifyImage_PEi386 ( oc );
2080 # elif defined(OBJFORMAT_MACHO)
2081 r = ocVerifyImage_MachO ( oc );
2083 barf("loadObj: no verify method");
2086 IF_DEBUG(linker, debugBelch("ocVerifyImage_* failed\n"));
2090 /* build the symbol list for this image */
2091 # if defined(OBJFORMAT_ELF)
2092 r = ocGetNames_ELF ( oc );
2093 # elif defined(OBJFORMAT_PEi386)
2094 r = ocGetNames_PEi386 ( oc );
2095 # elif defined(OBJFORMAT_MACHO)
2096 r = ocGetNames_MachO ( oc );
2098 barf("loadObj: no getNames method");
2101 IF_DEBUG(linker, debugBelch("ocGetNames_* failed\n"));
2105 /* loaded, but not resolved yet */
2106 oc->status = OBJECT_LOADED;
2107 IF_DEBUG(linker, debugBelch("loadObj done.\n"));
2112 /* -----------------------------------------------------------------------------
2113 * resolve all the currently unlinked objects in memory
2115 * Returns: 1 if ok, 0 on error.
2123 IF_DEBUG(linker, debugBelch("resolveObjs: start\n"));
2126 for (oc = objects; oc; oc = oc->next) {
2127 if (oc->status != OBJECT_RESOLVED) {
2128 # if defined(OBJFORMAT_ELF)
2129 r = ocResolve_ELF ( oc );
2130 # elif defined(OBJFORMAT_PEi386)
2131 r = ocResolve_PEi386 ( oc );
2132 # elif defined(OBJFORMAT_MACHO)
2133 r = ocResolve_MachO ( oc );
2135 barf("resolveObjs: not implemented on this platform");
2137 if (!r) { return r; }
2138 oc->status = OBJECT_RESOLVED;
2141 IF_DEBUG(linker, debugBelch("resolveObjs: done\n"));
2145 /* -----------------------------------------------------------------------------
2146 * delete an object from the pool
2149 unloadObj( char *path )
2151 ObjectCode *oc, *prev;
2152 HsBool unloadedAnyObj = HS_BOOL_FALSE;
2154 ASSERT(symhash != NULL);
2155 ASSERT(objects != NULL);
2160 for (oc = objects; oc; prev = oc, oc = oc->next) {
2161 if (!strcmp(oc->fileName,path)) {
2163 /* Remove all the mappings for the symbols within this
2168 for (i = 0; i < oc->n_symbols; i++) {
2169 if (oc->symbols[i] != NULL) {
2170 removeStrHashTable(symhash, oc->symbols[i], NULL);
2178 prev->next = oc->next;
2181 // We're going to leave this in place, in case there are
2182 // any pointers from the heap into it:
2183 // #ifdef mingw32_HOST_OS
2184 // VirtualFree(oc->image);
2186 // stgFree(oc->image);
2188 stgFree(oc->fileName);
2189 stgFree(oc->symbols);
2190 stgFree(oc->sections);
2193 /* This could be a member of an archive so continue
2194 * unloading other members. */
2195 unloadedAnyObj = HS_BOOL_TRUE;
2199 if (unloadedAnyObj) {
2203 errorBelch("unloadObj: can't find `%s' to unload", path);
2208 /* -----------------------------------------------------------------------------
2209 * Sanity checking. For each ObjectCode, maintain a list of address ranges
2210 * which may be prodded during relocation, and abort if we try and write
2211 * outside any of these.
2213 static void addProddableBlock ( ObjectCode* oc, void* start, int size )
2216 = stgMallocBytes(sizeof(ProddableBlock), "addProddableBlock");
2217 IF_DEBUG(linker, debugBelch("addProddableBlock %p %p %d\n", oc, start, size));
2221 pb->next = oc->proddables;
2222 oc->proddables = pb;
2225 static void checkProddableBlock ( ObjectCode* oc, void* addr )
2228 for (pb = oc->proddables; pb != NULL; pb = pb->next) {
2229 char* s = (char*)(pb->start);
2230 char* e = s + pb->size - 1;
2231 char* a = (char*)addr;
2232 /* Assumes that the biggest fixup involves a 4-byte write. This
2233 probably needs to be changed to 8 (ie, +7) on 64-bit
2235 if (a >= s && (a+3) <= e) return;
2237 barf("checkProddableBlock: invalid fixup in runtime linker");
2240 /* -----------------------------------------------------------------------------
2241 * Section management.
2243 static void addSection ( ObjectCode* oc, SectionKind kind,
2244 void* start, void* end )
2246 Section* s = stgMallocBytes(sizeof(Section), "addSection");
2250 s->next = oc->sections;
2253 debugBelch("addSection: %p-%p (size %d), kind %d\n",
2254 start, ((char*)end)-1, end - start + 1, kind );
2259 /* --------------------------------------------------------------------------
2261 * This is about allocating a small chunk of memory for every symbol in the
2262 * object file. We make sure that the SymboLExtras are always "in range" of
2263 * limited-range PC-relative instructions on various platforms by allocating
2264 * them right next to the object code itself.
2267 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
2270 ocAllocateSymbolExtras
2272 Allocate additional space at the end of the object file image to make room
2273 for jump islands (powerpc, x86_64) and GOT entries (x86_64).
2275 PowerPC relative branch instructions have a 24 bit displacement field.
2276 As PPC code is always 4-byte-aligned, this yields a +-32MB range.
2277 If a particular imported symbol is outside this range, we have to redirect
2278 the jump to a short piece of new code that just loads the 32bit absolute
2279 address and jumps there.
2280 On x86_64, PC-relative jumps and PC-relative accesses to the GOT are limited
2283 This function just allocates space for one SymbolExtra for every
2284 undefined symbol in the object file. The code for the jump islands is
2285 filled in by makeSymbolExtra below.
2288 static int ocAllocateSymbolExtras( ObjectCode* oc, int count, int first )
2295 int misalignment = 0;
2296 #ifdef darwin_HOST_OS
2297 misalignment = oc->misalignment;
2303 // round up to the nearest 4
2304 aligned = (oc->fileSize + 3) & ~3;
2307 pagesize = getpagesize();
2308 n = ROUND_UP( oc->fileSize, pagesize );
2309 m = ROUND_UP( aligned + sizeof (SymbolExtra) * count, pagesize );
2311 /* we try to use spare space at the end of the last page of the
2312 * image for the jump islands, but if there isn't enough space
2313 * then we have to map some (anonymously, remembering MAP_32BIT).
2315 if( m > n ) // we need to allocate more pages
2317 oc->symbol_extras = mmapForLinker(sizeof(SymbolExtra) * count,
2322 oc->symbol_extras = (SymbolExtra *) (oc->image + aligned);
2325 oc->image -= misalignment;
2326 oc->image = stgReallocBytes( oc->image,
2328 aligned + sizeof (SymbolExtra) * count,
2329 "ocAllocateSymbolExtras" );
2330 oc->image += misalignment;
2332 oc->symbol_extras = (SymbolExtra *) (oc->image + aligned);
2333 #endif /* USE_MMAP */
2335 memset( oc->symbol_extras, 0, sizeof (SymbolExtra) * count );
2338 oc->symbol_extras = NULL;
2340 oc->first_symbol_extra = first;
2341 oc->n_symbol_extras = count;
2346 static SymbolExtra* makeSymbolExtra( ObjectCode* oc,
2347 unsigned long symbolNumber,
2348 unsigned long target )
2352 ASSERT( symbolNumber >= oc->first_symbol_extra
2353 && symbolNumber - oc->first_symbol_extra < oc->n_symbol_extras);
2355 extra = &oc->symbol_extras[symbolNumber - oc->first_symbol_extra];
2357 #ifdef powerpc_HOST_ARCH
2358 // lis r12, hi16(target)
2359 extra->jumpIsland.lis_r12 = 0x3d80;
2360 extra->jumpIsland.hi_addr = target >> 16;
2362 // ori r12, r12, lo16(target)
2363 extra->jumpIsland.ori_r12_r12 = 0x618c;
2364 extra->jumpIsland.lo_addr = target & 0xffff;
2367 extra->jumpIsland.mtctr_r12 = 0x7d8903a6;
2370 extra->jumpIsland.bctr = 0x4e800420;
2372 #ifdef x86_64_HOST_ARCH
2374 static uint8_t jmp[] = { 0xFF, 0x25, 0xF2, 0xFF, 0xFF, 0xFF };
2375 extra->addr = target;
2376 memcpy(extra->jumpIsland, jmp, 6);
2384 /* --------------------------------------------------------------------------
2385 * PowerPC specifics (instruction cache flushing)
2386 * ------------------------------------------------------------------------*/
2388 #ifdef powerpc_HOST_ARCH
2390 ocFlushInstructionCache
2392 Flush the data & instruction caches.
2393 Because the PPC has split data/instruction caches, we have to
2394 do that whenever we modify code at runtime.
2397 static void ocFlushInstructionCache( ObjectCode *oc )
2399 int n = (oc->fileSize + sizeof( SymbolExtra ) * oc->n_symbol_extras + 3) / 4;
2400 unsigned long *p = (unsigned long *) oc->image;
2404 __asm__ volatile ( "dcbf 0,%0\n\t"
2412 __asm__ volatile ( "sync\n\t"
2418 /* --------------------------------------------------------------------------
2419 * PEi386 specifics (Win32 targets)
2420 * ------------------------------------------------------------------------*/
2422 /* The information for this linker comes from
2423 Microsoft Portable Executable
2424 and Common Object File Format Specification
2425 revision 5.1 January 1998
2426 which SimonM says comes from the MS Developer Network CDs.
2428 It can be found there (on older CDs), but can also be found
2431 http://www.microsoft.com/hwdev/hardware/PECOFF.asp
2433 (this is Rev 6.0 from February 1999).
2435 Things move, so if that fails, try searching for it via
2437 http://www.google.com/search?q=PE+COFF+specification
2439 The ultimate reference for the PE format is the Winnt.h
2440 header file that comes with the Platform SDKs; as always,
2441 implementations will drift wrt their documentation.
2443 A good background article on the PE format is Matt Pietrek's
2444 March 1994 article in Microsoft System Journal (MSJ)
2445 (Vol.9, No. 3): "Peering Inside the PE: A Tour of the
2446 Win32 Portable Executable File Format." The info in there
2447 has recently been updated in a two part article in
2448 MSDN magazine, issues Feb and March 2002,
2449 "Inside Windows: An In-Depth Look into the Win32 Portable
2450 Executable File Format"
2452 John Levine's book "Linkers and Loaders" contains useful
2457 #if defined(OBJFORMAT_PEi386)
2461 typedef unsigned char UChar;
2462 typedef unsigned short UInt16;
2463 typedef unsigned int UInt32;
2470 UInt16 NumberOfSections;
2471 UInt32 TimeDateStamp;
2472 UInt32 PointerToSymbolTable;
2473 UInt32 NumberOfSymbols;
2474 UInt16 SizeOfOptionalHeader;
2475 UInt16 Characteristics;
2479 #define sizeof_COFF_header 20
2486 UInt32 VirtualAddress;
2487 UInt32 SizeOfRawData;
2488 UInt32 PointerToRawData;
2489 UInt32 PointerToRelocations;
2490 UInt32 PointerToLinenumbers;
2491 UInt16 NumberOfRelocations;
2492 UInt16 NumberOfLineNumbers;
2493 UInt32 Characteristics;
2497 #define sizeof_COFF_section 40
2504 UInt16 SectionNumber;
2507 UChar NumberOfAuxSymbols;
2511 #define sizeof_COFF_symbol 18
2516 UInt32 VirtualAddress;
2517 UInt32 SymbolTableIndex;
2522 #define sizeof_COFF_reloc 10
2525 /* From PE spec doc, section 3.3.2 */
2526 /* Note use of MYIMAGE_* since IMAGE_* are already defined in
2527 windows.h -- for the same purpose, but I want to know what I'm
2529 #define MYIMAGE_FILE_RELOCS_STRIPPED 0x0001
2530 #define MYIMAGE_FILE_EXECUTABLE_IMAGE 0x0002
2531 #define MYIMAGE_FILE_DLL 0x2000
2532 #define MYIMAGE_FILE_SYSTEM 0x1000
2533 #define MYIMAGE_FILE_BYTES_REVERSED_HI 0x8000
2534 #define MYIMAGE_FILE_BYTES_REVERSED_LO 0x0080
2535 #define MYIMAGE_FILE_32BIT_MACHINE 0x0100
2537 /* From PE spec doc, section 5.4.2 and 5.4.4 */
2538 #define MYIMAGE_SYM_CLASS_EXTERNAL 2
2539 #define MYIMAGE_SYM_CLASS_STATIC 3
2540 #define MYIMAGE_SYM_UNDEFINED 0
2542 /* From PE spec doc, section 4.1 */
2543 #define MYIMAGE_SCN_CNT_CODE 0x00000020
2544 #define MYIMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040
2545 #define MYIMAGE_SCN_LNK_NRELOC_OVFL 0x01000000
2547 /* From PE spec doc, section 5.2.1 */
2548 #define MYIMAGE_REL_I386_DIR32 0x0006
2549 #define MYIMAGE_REL_I386_REL32 0x0014
2552 /* We use myindex to calculate array addresses, rather than
2553 simply doing the normal subscript thing. That's because
2554 some of the above structs have sizes which are not
2555 a whole number of words. GCC rounds their sizes up to a
2556 whole number of words, which means that the address calcs
2557 arising from using normal C indexing or pointer arithmetic
2558 are just plain wrong. Sigh.
2561 myindex ( int scale, void* base, int index )
2564 ((UChar*)base) + scale * index;
2569 printName ( UChar* name, UChar* strtab )
2571 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
2572 UInt32 strtab_offset = * (UInt32*)(name+4);
2573 debugBelch("%s", strtab + strtab_offset );
2576 for (i = 0; i < 8; i++) {
2577 if (name[i] == 0) break;
2578 debugBelch("%c", name[i] );
2585 copyName ( UChar* name, UChar* strtab, UChar* dst, int dstSize )
2587 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
2588 UInt32 strtab_offset = * (UInt32*)(name+4);
2589 strncpy ( (char*)dst, (char*)strtab+strtab_offset, dstSize );
2595 if (name[i] == 0) break;
2605 cstring_from_COFF_symbol_name ( UChar* name, UChar* strtab )
2608 /* If the string is longer than 8 bytes, look in the
2609 string table for it -- this will be correctly zero terminated.
2611 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
2612 UInt32 strtab_offset = * (UInt32*)(name+4);
2613 return ((UChar*)strtab) + strtab_offset;
2615 /* Otherwise, if shorter than 8 bytes, return the original,
2616 which by defn is correctly terminated.
2618 if (name[7]==0) return name;
2619 /* The annoying case: 8 bytes. Copy into a temporary
2620 (XXX which is never freed ...)
2622 newstr = stgMallocBytes(9, "cstring_from_COFF_symbol_name");
2624 strncpy((char*)newstr,(char*)name,8);
2629 /* Getting the name of a section is mildly tricky, so we make a
2630 function for it. Sadly, in one case we have to copy the string
2631 (when it is exactly 8 bytes long there's no trailing '\0'), so for
2632 consistency we *always* copy the string; the caller must free it
2635 cstring_from_section_name (UChar* name, UChar* strtab)
2640 int strtab_offset = strtol((char*)name+1,NULL,10);
2641 int len = strlen(((char*)strtab) + strtab_offset);
2643 newstr = stgMallocBytes(len, "cstring_from_section_symbol_name");
2644 strcpy((char*)newstr, (char*)((UChar*)strtab) + strtab_offset);
2649 newstr = stgMallocBytes(9, "cstring_from_section_symbol_name");
2651 strncpy((char*)newstr,(char*)name,8);
2657 /* Just compares the short names (first 8 chars) */
2658 static COFF_section *
2659 findPEi386SectionCalled ( ObjectCode* oc, UChar* name )
2663 = (COFF_header*)(oc->image);
2664 COFF_section* sectab
2666 ((UChar*)(oc->image))
2667 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2669 for (i = 0; i < hdr->NumberOfSections; i++) {
2672 COFF_section* section_i
2674 myindex ( sizeof_COFF_section, sectab, i );
2675 n1 = (UChar*) &(section_i->Name);
2677 if (n1[0]==n2[0] && n1[1]==n2[1] && n1[2]==n2[2] &&
2678 n1[3]==n2[3] && n1[4]==n2[4] && n1[5]==n2[5] &&
2679 n1[6]==n2[6] && n1[7]==n2[7])
2688 zapTrailingAtSign ( UChar* sym )
2690 # define my_isdigit(c) ((c) >= '0' && (c) <= '9')
2692 if (sym[0] == 0) return;
2694 while (sym[i] != 0) i++;
2697 while (j > 0 && my_isdigit(sym[j])) j--;
2698 if (j > 0 && sym[j] == '@' && j != i) sym[j] = 0;
2703 lookupSymbolInDLLs ( UChar *lbl )
2708 for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next) {
2709 /* debugBelch("look in %s for %s\n", o_dll->name, lbl); */
2711 if (lbl[0] == '_') {
2712 /* HACK: if the name has an initial underscore, try stripping
2713 it off & look that up first. I've yet to verify whether there's
2714 a Rule that governs whether an initial '_' *should always* be
2715 stripped off when mapping from import lib name to the DLL name.
2717 sym = GetProcAddress(o_dll->instance, (char*)(lbl+1));
2719 /*debugBelch("found %s in %s\n", lbl+1,o_dll->name);*/
2723 sym = GetProcAddress(o_dll->instance, (char*)lbl);
2725 /*debugBelch("found %s in %s\n", lbl,o_dll->name);*/
2734 ocVerifyImage_PEi386 ( ObjectCode* oc )
2739 COFF_section* sectab;
2740 COFF_symbol* symtab;
2742 /* debugBelch("\nLOADING %s\n", oc->fileName); */
2743 hdr = (COFF_header*)(oc->image);
2744 sectab = (COFF_section*) (
2745 ((UChar*)(oc->image))
2746 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2748 symtab = (COFF_symbol*) (
2749 ((UChar*)(oc->image))
2750 + hdr->PointerToSymbolTable
2752 strtab = ((UChar*)symtab)
2753 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2755 if (hdr->Machine != 0x14c) {
2756 errorBelch("%s: Not x86 PEi386", oc->fileName);
2759 if (hdr->SizeOfOptionalHeader != 0) {
2760 errorBelch("%s: PEi386 with nonempty optional header", oc->fileName);
2763 if ( /* (hdr->Characteristics & MYIMAGE_FILE_RELOCS_STRIPPED) || */
2764 (hdr->Characteristics & MYIMAGE_FILE_EXECUTABLE_IMAGE) ||
2765 (hdr->Characteristics & MYIMAGE_FILE_DLL) ||
2766 (hdr->Characteristics & MYIMAGE_FILE_SYSTEM) ) {
2767 errorBelch("%s: Not a PEi386 object file", oc->fileName);
2770 if ( (hdr->Characteristics & MYIMAGE_FILE_BYTES_REVERSED_HI)
2771 /* || !(hdr->Characteristics & MYIMAGE_FILE_32BIT_MACHINE) */ ) {
2772 errorBelch("%s: Invalid PEi386 word size or endiannness: %d",
2774 (int)(hdr->Characteristics));
2777 /* If the string table size is way crazy, this might indicate that
2778 there are more than 64k relocations, despite claims to the
2779 contrary. Hence this test. */
2780 /* debugBelch("strtab size %d\n", * (UInt32*)strtab); */
2782 if ( (*(UInt32*)strtab) > 600000 ) {
2783 /* Note that 600k has no special significance other than being
2784 big enough to handle the almost-2MB-sized lumps that
2785 constitute HSwin32*.o. */
2786 debugBelch("PEi386 object has suspiciously large string table; > 64k relocs?");
2791 /* No further verification after this point; only debug printing. */
2793 IF_DEBUG(linker, i=1);
2794 if (i == 0) return 1;
2796 debugBelch( "sectab offset = %d\n", ((UChar*)sectab) - ((UChar*)hdr) );
2797 debugBelch( "symtab offset = %d\n", ((UChar*)symtab) - ((UChar*)hdr) );
2798 debugBelch( "strtab offset = %d\n", ((UChar*)strtab) - ((UChar*)hdr) );
2801 debugBelch( "Machine: 0x%x\n", (UInt32)(hdr->Machine) );
2802 debugBelch( "# sections: %d\n", (UInt32)(hdr->NumberOfSections) );
2803 debugBelch( "time/date: 0x%x\n", (UInt32)(hdr->TimeDateStamp) );
2804 debugBelch( "symtab offset: %d\n", (UInt32)(hdr->PointerToSymbolTable) );
2805 debugBelch( "# symbols: %d\n", (UInt32)(hdr->NumberOfSymbols) );
2806 debugBelch( "sz of opt hdr: %d\n", (UInt32)(hdr->SizeOfOptionalHeader) );
2807 debugBelch( "characteristics: 0x%x\n", (UInt32)(hdr->Characteristics) );
2809 /* Print the section table. */
2811 for (i = 0; i < hdr->NumberOfSections; i++) {
2813 COFF_section* sectab_i
2815 myindex ( sizeof_COFF_section, sectab, i );
2822 printName ( sectab_i->Name, strtab );
2832 sectab_i->VirtualSize,
2833 sectab_i->VirtualAddress,
2834 sectab_i->SizeOfRawData,
2835 sectab_i->PointerToRawData,
2836 sectab_i->NumberOfRelocations,
2837 sectab_i->PointerToRelocations,
2838 sectab_i->PointerToRawData
2840 reltab = (COFF_reloc*) (
2841 ((UChar*)(oc->image)) + sectab_i->PointerToRelocations
2844 if ( sectab_i->Characteristics & MYIMAGE_SCN_LNK_NRELOC_OVFL ) {
2845 /* If the relocation field (a short) has overflowed, the
2846 * real count can be found in the first reloc entry.
2848 * See Section 4.1 (last para) of the PE spec (rev6.0).
2850 COFF_reloc* rel = (COFF_reloc*)
2851 myindex ( sizeof_COFF_reloc, reltab, 0 );
2852 noRelocs = rel->VirtualAddress;
2855 noRelocs = sectab_i->NumberOfRelocations;
2859 for (; j < noRelocs; j++) {
2861 COFF_reloc* rel = (COFF_reloc*)
2862 myindex ( sizeof_COFF_reloc, reltab, j );
2864 " type 0x%-4x vaddr 0x%-8x name `",
2866 rel->VirtualAddress );
2867 sym = (COFF_symbol*)
2868 myindex ( sizeof_COFF_symbol, symtab, rel->SymbolTableIndex );
2869 /* Hmm..mysterious looking offset - what's it for? SOF */
2870 printName ( sym->Name, strtab -10 );
2877 debugBelch("string table has size 0x%x\n", * (UInt32*)strtab );
2878 debugBelch("---START of string table---\n");
2879 for (i = 4; i < *(Int32*)strtab; i++) {
2881 debugBelch("\n"); else
2882 debugBelch("%c", strtab[i] );
2884 debugBelch("--- END of string table---\n");
2889 COFF_symbol* symtab_i;
2890 if (i >= (Int32)(hdr->NumberOfSymbols)) break;
2891 symtab_i = (COFF_symbol*)
2892 myindex ( sizeof_COFF_symbol, symtab, i );
2898 printName ( symtab_i->Name, strtab );
2907 (Int32)(symtab_i->SectionNumber),
2908 (UInt32)symtab_i->Type,
2909 (UInt32)symtab_i->StorageClass,
2910 (UInt32)symtab_i->NumberOfAuxSymbols
2912 i += symtab_i->NumberOfAuxSymbols;
2922 ocGetNames_PEi386 ( ObjectCode* oc )
2925 COFF_section* sectab;
2926 COFF_symbol* symtab;
2933 hdr = (COFF_header*)(oc->image);
2934 sectab = (COFF_section*) (
2935 ((UChar*)(oc->image))
2936 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2938 symtab = (COFF_symbol*) (
2939 ((UChar*)(oc->image))
2940 + hdr->PointerToSymbolTable
2942 strtab = ((UChar*)(oc->image))
2943 + hdr->PointerToSymbolTable
2944 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2946 /* Allocate space for any (local, anonymous) .bss sections. */
2948 for (i = 0; i < hdr->NumberOfSections; i++) {
2951 COFF_section* sectab_i
2953 myindex ( sizeof_COFF_section, sectab, i );
2955 char *secname = cstring_from_section_name(sectab_i->Name, strtab);
2957 if (0 != strcmp(secname, ".bss")) {
2964 /* sof 10/05: the PE spec text isn't too clear regarding what
2965 * the SizeOfRawData field is supposed to hold for object
2966 * file sections containing just uninitialized data -- for executables,
2967 * it is supposed to be zero; unclear what it's supposed to be
2968 * for object files. However, VirtualSize is guaranteed to be
2969 * zero for object files, which definitely suggests that SizeOfRawData
2970 * will be non-zero (where else would the size of this .bss section be
2971 * stored?) Looking at the COFF_section info for incoming object files,
2972 * this certainly appears to be the case.
2974 * => I suspect we've been incorrectly handling .bss sections in (relocatable)
2975 * object files up until now. This turned out to bite us with ghc-6.4.1's use
2976 * of gcc-3.4.x, which has started to emit initially-zeroed-out local 'static'
2977 * variable decls into to the .bss section. (The specific function in Q which
2978 * triggered this is libraries/base/cbits/dirUtils.c:__hscore_getFolderPath())
2980 if (sectab_i->VirtualSize == 0 && sectab_i->SizeOfRawData == 0) continue;
2981 /* This is a non-empty .bss section. Allocate zeroed space for
2982 it, and set its PointerToRawData field such that oc->image +
2983 PointerToRawData == addr_of_zeroed_space. */
2984 bss_sz = sectab_i->VirtualSize;
2985 if ( bss_sz < sectab_i->SizeOfRawData) { bss_sz = sectab_i->SizeOfRawData; }
2986 zspace = stgCallocBytes(1, bss_sz, "ocGetNames_PEi386(anonymous bss)");
2987 sectab_i->PointerToRawData = ((UChar*)zspace) - ((UChar*)(oc->image));
2988 addProddableBlock(oc, zspace, bss_sz);
2989 /* debugBelch("BSS anon section at 0x%x\n", zspace); */
2992 /* Copy section information into the ObjectCode. */
2994 for (i = 0; i < hdr->NumberOfSections; i++) {
3000 = SECTIONKIND_OTHER;
3001 COFF_section* sectab_i
3003 myindex ( sizeof_COFF_section, sectab, i );
3005 char *secname = cstring_from_section_name(sectab_i->Name, strtab);
3007 IF_DEBUG(linker, debugBelch("section name = %s\n", secname ));
3010 /* I'm sure this is the Right Way to do it. However, the
3011 alternative of testing the sectab_i->Name field seems to
3012 work ok with Cygwin.
3014 if (sectab_i->Characteristics & MYIMAGE_SCN_CNT_CODE ||
3015 sectab_i->Characteristics & MYIMAGE_SCN_CNT_INITIALIZED_DATA)
3016 kind = SECTIONKIND_CODE_OR_RODATA;
3019 if (0==strcmp(".text",(char*)secname) ||
3020 0==strcmp(".rdata",(char*)secname)||
3021 0==strcmp(".rodata",(char*)secname))
3022 kind = SECTIONKIND_CODE_OR_RODATA;
3023 if (0==strcmp(".data",(char*)secname) ||
3024 0==strcmp(".bss",(char*)secname))
3025 kind = SECTIONKIND_RWDATA;
3027 ASSERT(sectab_i->SizeOfRawData == 0 || sectab_i->VirtualSize == 0);
3028 sz = sectab_i->SizeOfRawData;
3029 if (sz < sectab_i->VirtualSize) sz = sectab_i->VirtualSize;
3031 start = ((UChar*)(oc->image)) + sectab_i->PointerToRawData;
3032 end = start + sz - 1;
3034 if (kind == SECTIONKIND_OTHER
3035 /* Ignore sections called which contain stabs debugging
3037 && 0 != strcmp(".stab", (char*)secname)
3038 && 0 != strcmp(".stabstr", (char*)secname)
3039 /* ignore constructor section for now */
3040 && 0 != strcmp(".ctors", (char*)secname)
3041 /* ignore section generated from .ident */
3042 && 0!= strncmp(".debug", (char*)secname, 6)
3043 /* ignore unknown section that appeared in gcc 3.4.5(?) */
3044 && 0!= strcmp(".reloc", (char*)secname)
3045 && 0 != strcmp(".rdata$zzz", (char*)secname)
3047 errorBelch("Unknown PEi386 section name `%s' (while processing: %s)", secname, oc->fileName);
3052 if (kind != SECTIONKIND_OTHER && end >= start) {
3053 addSection(oc, kind, start, end);
3054 addProddableBlock(oc, start, end - start + 1);
3060 /* Copy exported symbols into the ObjectCode. */
3062 oc->n_symbols = hdr->NumberOfSymbols;
3063 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
3064 "ocGetNames_PEi386(oc->symbols)");
3065 /* Call me paranoid; I don't care. */
3066 for (i = 0; i < oc->n_symbols; i++)
3067 oc->symbols[i] = NULL;
3071 COFF_symbol* symtab_i;
3072 if (i >= (Int32)(hdr->NumberOfSymbols)) break;
3073 symtab_i = (COFF_symbol*)
3074 myindex ( sizeof_COFF_symbol, symtab, i );
3078 if (symtab_i->StorageClass == MYIMAGE_SYM_CLASS_EXTERNAL
3079 && symtab_i->SectionNumber != MYIMAGE_SYM_UNDEFINED) {
3080 /* This symbol is global and defined, viz, exported */
3081 /* for MYIMAGE_SYMCLASS_EXTERNAL
3082 && !MYIMAGE_SYM_UNDEFINED,
3083 the address of the symbol is:
3084 address of relevant section + offset in section
3086 COFF_section* sectabent
3087 = (COFF_section*) myindex ( sizeof_COFF_section,
3089 symtab_i->SectionNumber-1 );
3090 addr = ((UChar*)(oc->image))
3091 + (sectabent->PointerToRawData
3095 if (symtab_i->SectionNumber == MYIMAGE_SYM_UNDEFINED
3096 && symtab_i->Value > 0) {
3097 /* This symbol isn't in any section at all, ie, global bss.
3098 Allocate zeroed space for it. */
3099 addr = stgCallocBytes(1, symtab_i->Value,
3100 "ocGetNames_PEi386(non-anonymous bss)");
3101 addSection(oc, SECTIONKIND_RWDATA, addr,
3102 ((UChar*)addr) + symtab_i->Value - 1);
3103 addProddableBlock(oc, addr, symtab_i->Value);
3104 /* debugBelch("BSS section at 0x%x\n", addr); */
3107 if (addr != NULL ) {
3108 sname = cstring_from_COFF_symbol_name ( symtab_i->Name, strtab );
3109 /* debugBelch("addSymbol %p `%s \n", addr,sname); */
3110 IF_DEBUG(linker, debugBelch("addSymbol %p `%s'\n", addr,sname);)
3111 ASSERT(i >= 0 && i < oc->n_symbols);
3112 /* cstring_from_COFF_symbol_name always succeeds. */
3113 oc->symbols[i] = (char*)sname;
3114 ghciInsertStrHashTable(oc->fileName, symhash, (char*)sname, addr);
3118 "IGNORING symbol %d\n"
3122 printName ( symtab_i->Name, strtab );
3131 (Int32)(symtab_i->SectionNumber),
3132 (UInt32)symtab_i->Type,
3133 (UInt32)symtab_i->StorageClass,
3134 (UInt32)symtab_i->NumberOfAuxSymbols
3139 i += symtab_i->NumberOfAuxSymbols;
3148 ocResolve_PEi386 ( ObjectCode* oc )
3151 COFF_section* sectab;
3152 COFF_symbol* symtab;
3162 /* ToDo: should be variable-sized? But is at least safe in the
3163 sense of buffer-overrun-proof. */
3165 /* debugBelch("resolving for %s\n", oc->fileName); */
3167 hdr = (COFF_header*)(oc->image);
3168 sectab = (COFF_section*) (
3169 ((UChar*)(oc->image))
3170 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
3172 symtab = (COFF_symbol*) (
3173 ((UChar*)(oc->image))
3174 + hdr->PointerToSymbolTable
3176 strtab = ((UChar*)(oc->image))
3177 + hdr->PointerToSymbolTable
3178 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
3180 for (i = 0; i < hdr->NumberOfSections; i++) {
3181 COFF_section* sectab_i
3183 myindex ( sizeof_COFF_section, sectab, i );
3186 ((UChar*)(oc->image)) + sectab_i->PointerToRelocations
3189 char *secname = cstring_from_section_name(sectab_i->Name, strtab);
3191 /* Ignore sections called which contain stabs debugging
3193 if (0 == strcmp(".stab", (char*)secname)
3194 || 0 == strcmp(".stabstr", (char*)secname)
3195 || 0 == strcmp(".ctors", (char*)secname)
3196 || 0 == strncmp(".debug", (char*)secname, 6)
3197 || 0 == strcmp(".rdata$zzz", (char*)secname)) {
3204 if ( sectab_i->Characteristics & MYIMAGE_SCN_LNK_NRELOC_OVFL ) {
3205 /* If the relocation field (a short) has overflowed, the
3206 * real count can be found in the first reloc entry.
3208 * See Section 4.1 (last para) of the PE spec (rev6.0).
3210 * Nov2003 update: the GNU linker still doesn't correctly
3211 * handle the generation of relocatable object files with
3212 * overflown relocations. Hence the output to warn of potential
3215 COFF_reloc* rel = (COFF_reloc*)
3216 myindex ( sizeof_COFF_reloc, reltab, 0 );
3217 noRelocs = rel->VirtualAddress;
3219 /* 10/05: we now assume (and check for) a GNU ld that is capable
3220 * of handling object files with (>2^16) of relocs.
3223 debugBelch("WARNING: Overflown relocation field (# relocs found: %u)\n",
3228 noRelocs = sectab_i->NumberOfRelocations;
3233 for (; j < noRelocs; j++) {
3235 COFF_reloc* reltab_j
3237 myindex ( sizeof_COFF_reloc, reltab, j );
3239 /* the location to patch */
3241 ((UChar*)(oc->image))
3242 + (sectab_i->PointerToRawData
3243 + reltab_j->VirtualAddress
3244 - sectab_i->VirtualAddress )
3246 /* the existing contents of pP */
3248 /* the symbol to connect to */
3249 sym = (COFF_symbol*)
3250 myindex ( sizeof_COFF_symbol,
3251 symtab, reltab_j->SymbolTableIndex );
3254 "reloc sec %2d num %3d: type 0x%-4x "
3255 "vaddr 0x%-8x name `",
3257 (UInt32)reltab_j->Type,
3258 reltab_j->VirtualAddress );
3259 printName ( sym->Name, strtab );
3260 debugBelch("'\n" ));
3262 if (sym->StorageClass == MYIMAGE_SYM_CLASS_STATIC) {
3263 COFF_section* section_sym
3264 = findPEi386SectionCalled ( oc, sym->Name );
3266 errorBelch("%s: can't find section `%s'", oc->fileName, sym->Name);
3269 S = ((UInt32)(oc->image))
3270 + (section_sym->PointerToRawData
3273 copyName ( sym->Name, strtab, symbol, 1000-1 );
3274 S = (UInt32) lookupSymbol( (char*)symbol );
3275 if ((void*)S != NULL) goto foundit;
3276 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3280 checkProddableBlock(oc, pP);
3281 switch (reltab_j->Type) {
3282 case MYIMAGE_REL_I386_DIR32:
3285 case MYIMAGE_REL_I386_REL32:
3286 /* Tricky. We have to insert a displacement at
3287 pP which, when added to the PC for the _next_
3288 insn, gives the address of the target (S).
3289 Problem is to know the address of the next insn
3290 when we only know pP. We assume that this
3291 literal field is always the last in the insn,
3292 so that the address of the next insn is pP+4
3293 -- hence the constant 4.
3294 Also I don't know if A should be added, but so
3295 far it has always been zero.
3297 SOF 05/2005: 'A' (old contents of *pP) have been observed
3298 to contain values other than zero (the 'wx' object file
3299 that came with wxhaskell-0.9.4; dunno how it was compiled..).
3300 So, add displacement to old value instead of asserting
3301 A to be zero. Fixes wxhaskell-related crashes, and no other
3302 ill effects have been observed.
3304 Update: the reason why we're seeing these more elaborate
3305 relocations is due to a switch in how the NCG compiles SRTs
3306 and offsets to them from info tables. SRTs live in .(ro)data,
3307 while info tables live in .text, causing GAS to emit REL32/DISP32
3308 relocations with non-zero values. Adding the displacement is
3309 the right thing to do.
3311 *pP = S - ((UInt32)pP) - 4 + A;
3314 debugBelch("%s: unhandled PEi386 relocation type %d",
3315 oc->fileName, reltab_j->Type);
3322 IF_DEBUG(linker, debugBelch("completed %s", oc->fileName));
3326 #endif /* defined(OBJFORMAT_PEi386) */
3329 /* --------------------------------------------------------------------------
3331 * ------------------------------------------------------------------------*/
3333 #if defined(OBJFORMAT_ELF)
3338 #if defined(sparc_HOST_ARCH)
3339 # define ELF_TARGET_SPARC /* Used inside <elf.h> */
3340 #elif defined(i386_HOST_ARCH)
3341 # define ELF_TARGET_386 /* Used inside <elf.h> */
3342 #elif defined(x86_64_HOST_ARCH)
3343 # define ELF_TARGET_X64_64
3347 #if !defined(openbsd_HOST_OS)
3350 /* openbsd elf has things in different places, with diff names */
3351 # include <elf_abi.h>
3352 # include <machine/reloc.h>
3353 # define R_386_32 RELOC_32
3354 # define R_386_PC32 RELOC_PC32
3357 /* If elf.h doesn't define it */
3358 # ifndef R_X86_64_PC64
3359 # define R_X86_64_PC64 24
3363 * Define a set of types which can be used for both ELF32 and ELF64
3367 #define ELFCLASS ELFCLASS64
3368 #define Elf_Addr Elf64_Addr
3369 #define Elf_Word Elf64_Word
3370 #define Elf_Sword Elf64_Sword
3371 #define Elf_Ehdr Elf64_Ehdr
3372 #define Elf_Phdr Elf64_Phdr
3373 #define Elf_Shdr Elf64_Shdr
3374 #define Elf_Sym Elf64_Sym
3375 #define Elf_Rel Elf64_Rel
3376 #define Elf_Rela Elf64_Rela
3378 #define ELF_ST_TYPE ELF64_ST_TYPE
3381 #define ELF_ST_BIND ELF64_ST_BIND
3384 #define ELF_R_TYPE ELF64_R_TYPE
3387 #define ELF_R_SYM ELF64_R_SYM
3390 #define ELFCLASS ELFCLASS32
3391 #define Elf_Addr Elf32_Addr
3392 #define Elf_Word Elf32_Word
3393 #define Elf_Sword Elf32_Sword
3394 #define Elf_Ehdr Elf32_Ehdr
3395 #define Elf_Phdr Elf32_Phdr
3396 #define Elf_Shdr Elf32_Shdr
3397 #define Elf_Sym Elf32_Sym
3398 #define Elf_Rel Elf32_Rel
3399 #define Elf_Rela Elf32_Rela
3401 #define ELF_ST_TYPE ELF32_ST_TYPE
3404 #define ELF_ST_BIND ELF32_ST_BIND
3407 #define ELF_R_TYPE ELF32_R_TYPE
3410 #define ELF_R_SYM ELF32_R_SYM
3416 * Functions to allocate entries in dynamic sections. Currently we simply
3417 * preallocate a large number, and we don't check if a entry for the given
3418 * target already exists (a linear search is too slow). Ideally these
3419 * entries would be associated with symbols.
3422 /* These sizes sufficient to load HSbase + HShaskell98 + a few modules */
3423 #define GOT_SIZE 0x20000
3424 #define FUNCTION_TABLE_SIZE 0x10000
3425 #define PLT_SIZE 0x08000
3428 static Elf_Addr got[GOT_SIZE];
3429 static unsigned int gotIndex;
3430 static Elf_Addr gp_val = (Elf_Addr)got;
3433 allocateGOTEntry(Elf_Addr target)
3437 if (gotIndex >= GOT_SIZE)
3438 barf("Global offset table overflow");
3440 entry = &got[gotIndex++];
3442 return (Elf_Addr)entry;
3446 #ifdef ELF_FUNCTION_DESC
3452 static FunctionDesc functionTable[FUNCTION_TABLE_SIZE];
3453 static unsigned int functionTableIndex;
3456 allocateFunctionDesc(Elf_Addr target)
3458 FunctionDesc *entry;
3460 if (functionTableIndex >= FUNCTION_TABLE_SIZE)
3461 barf("Function table overflow");
3463 entry = &functionTable[functionTableIndex++];
3465 entry->gp = (Elf_Addr)gp_val;
3466 return (Elf_Addr)entry;
3470 copyFunctionDesc(Elf_Addr target)
3472 FunctionDesc *olddesc = (FunctionDesc *)target;
3473 FunctionDesc *newdesc;
3475 newdesc = (FunctionDesc *)allocateFunctionDesc(olddesc->ip);
3476 newdesc->gp = olddesc->gp;
3477 return (Elf_Addr)newdesc;
3484 unsigned char code[sizeof(plt_code)];
3488 allocatePLTEntry(Elf_Addr target, ObjectCode *oc)
3490 PLTEntry *plt = (PLTEntry *)oc->plt;
3493 if (oc->pltIndex >= PLT_SIZE)
3494 barf("Procedure table overflow");
3496 entry = &plt[oc->pltIndex++];
3497 memcpy(entry->code, plt_code, sizeof(entry->code));
3498 PLT_RELOC(entry->code, target);
3499 return (Elf_Addr)entry;
3505 return (PLT_SIZE * sizeof(PLTEntry));
3511 * Generic ELF functions
3515 findElfSection ( void* objImage, Elf_Word sh_type )
3517 char* ehdrC = (char*)objImage;
3518 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3519 Elf_Shdr* shdr = (Elf_Shdr*)(ehdrC + ehdr->e_shoff);
3520 char* sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
3524 for (i = 0; i < ehdr->e_shnum; i++) {
3525 if (shdr[i].sh_type == sh_type
3526 /* Ignore the section header's string table. */
3527 && i != ehdr->e_shstrndx
3528 /* Ignore string tables named .stabstr, as they contain
3530 && 0 != memcmp(".stabstr", sh_strtab + shdr[i].sh_name, 8)
3532 ptr = ehdrC + shdr[i].sh_offset;
3540 ocVerifyImage_ELF ( ObjectCode* oc )
3544 int i, j, nent, nstrtab, nsymtabs;
3548 char* ehdrC = (char*)(oc->image);
3549 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3551 if (ehdr->e_ident[EI_MAG0] != ELFMAG0 ||
3552 ehdr->e_ident[EI_MAG1] != ELFMAG1 ||
3553 ehdr->e_ident[EI_MAG2] != ELFMAG2 ||
3554 ehdr->e_ident[EI_MAG3] != ELFMAG3) {
3555 errorBelch("%s: not an ELF object", oc->fileName);
3559 if (ehdr->e_ident[EI_CLASS] != ELFCLASS) {
3560 errorBelch("%s: unsupported ELF format", oc->fileName);
3564 if (ehdr->e_ident[EI_DATA] == ELFDATA2LSB) {
3565 IF_DEBUG(linker,debugBelch( "Is little-endian\n" ));
3567 if (ehdr->e_ident[EI_DATA] == ELFDATA2MSB) {
3568 IF_DEBUG(linker,debugBelch( "Is big-endian\n" ));
3570 errorBelch("%s: unknown endiannness", oc->fileName);
3574 if (ehdr->e_type != ET_REL) {
3575 errorBelch("%s: not a relocatable object (.o) file", oc->fileName);
3578 IF_DEBUG(linker, debugBelch( "Is a relocatable object (.o) file\n" ));
3580 IF_DEBUG(linker,debugBelch( "Architecture is " ));
3581 switch (ehdr->e_machine) {
3582 case EM_386: IF_DEBUG(linker,debugBelch( "x86" )); break;
3583 #ifdef EM_SPARC32PLUS
3584 case EM_SPARC32PLUS:
3586 case EM_SPARC: IF_DEBUG(linker,debugBelch( "sparc" )); break;
3588 case EM_IA_64: IF_DEBUG(linker,debugBelch( "ia64" )); break;
3590 case EM_PPC: IF_DEBUG(linker,debugBelch( "powerpc32" )); break;
3592 case EM_X86_64: IF_DEBUG(linker,debugBelch( "x86_64" )); break;
3593 #elif defined(EM_AMD64)
3594 case EM_AMD64: IF_DEBUG(linker,debugBelch( "amd64" )); break;
3596 default: IF_DEBUG(linker,debugBelch( "unknown" ));
3597 errorBelch("%s: unknown architecture (e_machine == %d)"
3598 , oc->fileName, ehdr->e_machine);
3602 IF_DEBUG(linker,debugBelch(
3603 "\nSection header table: start %ld, n_entries %d, ent_size %d\n",
3604 (long)ehdr->e_shoff, ehdr->e_shnum, ehdr->e_shentsize ));
3606 ASSERT (ehdr->e_shentsize == sizeof(Elf_Shdr));
3608 shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
3610 if (ehdr->e_shstrndx == SHN_UNDEF) {
3611 errorBelch("%s: no section header string table", oc->fileName);
3614 IF_DEBUG(linker,debugBelch( "Section header string table is section %d\n",
3616 sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
3619 for (i = 0; i < ehdr->e_shnum; i++) {
3620 IF_DEBUG(linker,debugBelch("%2d: ", i ));
3621 IF_DEBUG(linker,debugBelch("type=%2d ", (int)shdr[i].sh_type ));
3622 IF_DEBUG(linker,debugBelch("size=%4d ", (int)shdr[i].sh_size ));
3623 IF_DEBUG(linker,debugBelch("offs=%4d ", (int)shdr[i].sh_offset ));
3624 IF_DEBUG(linker,debugBelch(" (%p .. %p) ",
3625 ehdrC + shdr[i].sh_offset,
3626 ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1));
3628 if (shdr[i].sh_type == SHT_REL) {
3629 IF_DEBUG(linker,debugBelch("Rel " ));
3630 } else if (shdr[i].sh_type == SHT_RELA) {
3631 IF_DEBUG(linker,debugBelch("RelA " ));
3633 IF_DEBUG(linker,debugBelch(" "));
3636 IF_DEBUG(linker,debugBelch("sname=%s\n", sh_strtab + shdr[i].sh_name ));
3640 IF_DEBUG(linker,debugBelch( "\nString tables" ));
3643 for (i = 0; i < ehdr->e_shnum; i++) {
3644 if (shdr[i].sh_type == SHT_STRTAB
3645 /* Ignore the section header's string table. */
3646 && i != ehdr->e_shstrndx
3647 /* Ignore string tables named .stabstr, as they contain
3649 && 0 != memcmp(".stabstr", sh_strtab + shdr[i].sh_name, 8)
3651 IF_DEBUG(linker,debugBelch(" section %d is a normal string table", i ));
3652 strtab = ehdrC + shdr[i].sh_offset;
3657 errorBelch("%s: no string tables, or too many", oc->fileName);
3662 IF_DEBUG(linker,debugBelch( "\nSymbol tables" ));
3663 for (i = 0; i < ehdr->e_shnum; i++) {
3664 if (shdr[i].sh_type != SHT_SYMTAB) continue;
3665 IF_DEBUG(linker,debugBelch( "section %d is a symbol table\n", i ));
3667 stab = (Elf_Sym*) (ehdrC + shdr[i].sh_offset);
3668 nent = shdr[i].sh_size / sizeof(Elf_Sym);
3669 IF_DEBUG(linker,debugBelch( " number of entries is apparently %d (%ld rem)\n",
3671 (long)shdr[i].sh_size % sizeof(Elf_Sym)
3673 if (0 != shdr[i].sh_size % sizeof(Elf_Sym)) {
3674 errorBelch("%s: non-integral number of symbol table entries", oc->fileName);
3677 for (j = 0; j < nent; j++) {
3678 IF_DEBUG(linker,debugBelch(" %2d ", j ));
3679 IF_DEBUG(linker,debugBelch(" sec=%-5d size=%-3d val=%5p ",
3680 (int)stab[j].st_shndx,
3681 (int)stab[j].st_size,
3682 (char*)stab[j].st_value ));
3684 IF_DEBUG(linker,debugBelch("type=" ));
3685 switch (ELF_ST_TYPE(stab[j].st_info)) {
3686 case STT_NOTYPE: IF_DEBUG(linker,debugBelch("notype " )); break;
3687 case STT_OBJECT: IF_DEBUG(linker,debugBelch("object " )); break;
3688 case STT_FUNC : IF_DEBUG(linker,debugBelch("func " )); break;
3689 case STT_SECTION: IF_DEBUG(linker,debugBelch("section" )); break;
3690 case STT_FILE: IF_DEBUG(linker,debugBelch("file " )); break;
3691 default: IF_DEBUG(linker,debugBelch("? " )); break;
3693 IF_DEBUG(linker,debugBelch(" " ));
3695 IF_DEBUG(linker,debugBelch("bind=" ));
3696 switch (ELF_ST_BIND(stab[j].st_info)) {
3697 case STB_LOCAL : IF_DEBUG(linker,debugBelch("local " )); break;
3698 case STB_GLOBAL: IF_DEBUG(linker,debugBelch("global" )); break;
3699 case STB_WEAK : IF_DEBUG(linker,debugBelch("weak " )); break;
3700 default: IF_DEBUG(linker,debugBelch("? " )); break;
3702 IF_DEBUG(linker,debugBelch(" " ));
3704 IF_DEBUG(linker,debugBelch("name=%s\n", strtab + stab[j].st_name ));
3708 if (nsymtabs == 0) {
3709 errorBelch("%s: didn't find any symbol tables", oc->fileName);
3716 static int getSectionKind_ELF( Elf_Shdr *hdr, int *is_bss )
3720 if (hdr->sh_type == SHT_PROGBITS
3721 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_EXECINSTR)) {
3722 /* .text-style section */
3723 return SECTIONKIND_CODE_OR_RODATA;
3726 if (hdr->sh_type == SHT_PROGBITS
3727 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_WRITE)) {
3728 /* .data-style section */
3729 return SECTIONKIND_RWDATA;
3732 if (hdr->sh_type == SHT_PROGBITS
3733 && (hdr->sh_flags & SHF_ALLOC) && !(hdr->sh_flags & SHF_WRITE)) {
3734 /* .rodata-style section */
3735 return SECTIONKIND_CODE_OR_RODATA;
3738 if (hdr->sh_type == SHT_NOBITS
3739 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_WRITE)) {
3740 /* .bss-style section */
3742 return SECTIONKIND_RWDATA;
3745 return SECTIONKIND_OTHER;
3750 ocGetNames_ELF ( ObjectCode* oc )
3755 char* ehdrC = (char*)(oc->image);
3756 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3757 char* strtab = findElfSection ( ehdrC, SHT_STRTAB );
3758 Elf_Shdr* shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
3760 ASSERT(symhash != NULL);
3763 errorBelch("%s: no strtab", oc->fileName);
3768 for (i = 0; i < ehdr->e_shnum; i++) {
3769 /* Figure out what kind of section it is. Logic derived from
3770 Figure 1.14 ("Special Sections") of the ELF document
3771 ("Portable Formats Specification, Version 1.1"). */
3773 SectionKind kind = getSectionKind_ELF(&shdr[i], &is_bss);
3775 if (is_bss && shdr[i].sh_size > 0) {
3776 /* This is a non-empty .bss section. Allocate zeroed space for
3777 it, and set its .sh_offset field such that
3778 ehdrC + .sh_offset == addr_of_zeroed_space. */
3779 char* zspace = stgCallocBytes(1, shdr[i].sh_size,
3780 "ocGetNames_ELF(BSS)");
3781 shdr[i].sh_offset = ((char*)zspace) - ((char*)ehdrC);
3783 debugBelch("BSS section at 0x%x, size %d\n",
3784 zspace, shdr[i].sh_size);
3788 /* fill in the section info */
3789 if (kind != SECTIONKIND_OTHER && shdr[i].sh_size > 0) {
3790 addProddableBlock(oc, ehdrC + shdr[i].sh_offset, shdr[i].sh_size);
3791 addSection(oc, kind, ehdrC + shdr[i].sh_offset,
3792 ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1);
3795 if (shdr[i].sh_type != SHT_SYMTAB) continue;
3797 /* copy stuff into this module's object symbol table */
3798 stab = (Elf_Sym*) (ehdrC + shdr[i].sh_offset);
3799 nent = shdr[i].sh_size / sizeof(Elf_Sym);
3801 oc->n_symbols = nent;
3802 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
3803 "ocGetNames_ELF(oc->symbols)");
3805 for (j = 0; j < nent; j++) {
3807 char isLocal = FALSE; /* avoids uninit-var warning */
3809 char* nm = strtab + stab[j].st_name;
3810 int secno = stab[j].st_shndx;
3812 /* Figure out if we want to add it; if so, set ad to its
3813 address. Otherwise leave ad == NULL. */
3815 if (secno == SHN_COMMON) {
3817 ad = stgCallocBytes(1, stab[j].st_size, "ocGetNames_ELF(COMMON)");
3819 debugBelch("COMMON symbol, size %d name %s\n",
3820 stab[j].st_size, nm);
3822 /* Pointless to do addProddableBlock() for this area,
3823 since the linker should never poke around in it. */
3826 if ( ( ELF_ST_BIND(stab[j].st_info)==STB_GLOBAL
3827 || ELF_ST_BIND(stab[j].st_info)==STB_LOCAL
3829 /* and not an undefined symbol */
3830 && stab[j].st_shndx != SHN_UNDEF
3831 /* and not in a "special section" */
3832 && stab[j].st_shndx < SHN_LORESERVE
3834 /* and it's a not a section or string table or anything silly */
3835 ( ELF_ST_TYPE(stab[j].st_info)==STT_FUNC ||
3836 ELF_ST_TYPE(stab[j].st_info)==STT_OBJECT ||
3837 ELF_ST_TYPE(stab[j].st_info)==STT_NOTYPE
3840 /* Section 0 is the undefined section, hence > and not >=. */
3841 ASSERT(secno > 0 && secno < ehdr->e_shnum);
3843 if (shdr[secno].sh_type == SHT_NOBITS) {
3844 debugBelch(" BSS symbol, size %d off %d name %s\n",
3845 stab[j].st_size, stab[j].st_value, nm);
3848 ad = ehdrC + shdr[ secno ].sh_offset + stab[j].st_value;
3849 if (ELF_ST_BIND(stab[j].st_info)==STB_LOCAL) {
3852 #ifdef ELF_FUNCTION_DESC
3853 /* dlsym() and the initialisation table both give us function
3854 * descriptors, so to be consistent we store function descriptors
3855 * in the symbol table */
3856 if (ELF_ST_TYPE(stab[j].st_info) == STT_FUNC)
3857 ad = (char *)allocateFunctionDesc((Elf_Addr)ad);
3859 IF_DEBUG(linker,debugBelch( "addOTabName(GLOB): %10p %s %s\n",
3860 ad, oc->fileName, nm ));
3865 /* And the decision is ... */
3869 oc->symbols[j] = nm;
3872 /* Ignore entirely. */
3874 ghciInsertStrHashTable(oc->fileName, symhash, nm, ad);
3878 IF_DEBUG(linker,debugBelch( "skipping `%s'\n",
3879 strtab + stab[j].st_name ));
3882 "skipping bind = %d, type = %d, shndx = %d `%s'\n",
3883 (int)ELF_ST_BIND(stab[j].st_info),
3884 (int)ELF_ST_TYPE(stab[j].st_info),
3885 (int)stab[j].st_shndx,
3886 strtab + stab[j].st_name
3889 oc->symbols[j] = NULL;
3898 /* Do ELF relocations which lack an explicit addend. All x86-linux
3899 relocations appear to be of this form. */
3901 do_Elf_Rel_relocations ( ObjectCode* oc, char* ehdrC,
3902 Elf_Shdr* shdr, int shnum,
3903 Elf_Sym* stab, char* strtab )
3908 Elf_Rel* rtab = (Elf_Rel*) (ehdrC + shdr[shnum].sh_offset);
3909 int nent = shdr[shnum].sh_size / sizeof(Elf_Rel);
3910 int target_shndx = shdr[shnum].sh_info;
3911 int symtab_shndx = shdr[shnum].sh_link;
3913 stab = (Elf_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
3914 targ = (Elf_Word*)(ehdrC + shdr[ target_shndx ].sh_offset);
3915 IF_DEBUG(linker,debugBelch( "relocations for section %d using symtab %d\n",
3916 target_shndx, symtab_shndx ));
3918 /* Skip sections that we're not interested in. */
3921 SectionKind kind = getSectionKind_ELF(&shdr[target_shndx], &is_bss);
3922 if (kind == SECTIONKIND_OTHER) {
3923 IF_DEBUG(linker,debugBelch( "skipping (target section not loaded)"));
3928 for (j = 0; j < nent; j++) {
3929 Elf_Addr offset = rtab[j].r_offset;
3930 Elf_Addr info = rtab[j].r_info;
3932 Elf_Addr P = ((Elf_Addr)targ) + offset;
3933 Elf_Word* pP = (Elf_Word*)P;
3938 StgStablePtr stablePtr;
3941 IF_DEBUG(linker,debugBelch( "Rel entry %3d is raw(%6p %6p)",
3942 j, (void*)offset, (void*)info ));
3944 IF_DEBUG(linker,debugBelch( " ZERO" ));
3947 Elf_Sym sym = stab[ELF_R_SYM(info)];
3948 /* First see if it is a local symbol. */
3949 if (ELF_ST_BIND(sym.st_info) == STB_LOCAL) {
3950 /* Yes, so we can get the address directly from the ELF symbol
3952 symbol = sym.st_name==0 ? "(noname)" : strtab+sym.st_name;
3954 (ehdrC + shdr[ sym.st_shndx ].sh_offset
3955 + stab[ELF_R_SYM(info)].st_value);
3958 symbol = strtab + sym.st_name;
3959 stablePtr = (StgStablePtr)lookupHashTable(stablehash, (StgWord)symbol);
3960 if (NULL == stablePtr) {
3961 /* No, so look up the name in our global table. */
3962 S_tmp = lookupSymbol( symbol );
3963 S = (Elf_Addr)S_tmp;
3965 stableVal = deRefStablePtr( stablePtr );
3967 S = (Elf_Addr)S_tmp;
3971 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3974 IF_DEBUG(linker,debugBelch( "`%s' resolves to %p\n", symbol, (void*)S ));
3977 IF_DEBUG(linker,debugBelch( "Reloc: P = %p S = %p A = %p\n",
3978 (void*)P, (void*)S, (void*)A ));
3979 checkProddableBlock ( oc, pP );
3983 switch (ELF_R_TYPE(info)) {
3984 # ifdef i386_HOST_ARCH
3985 case R_386_32: *pP = value; break;
3986 case R_386_PC32: *pP = value - P; break;
3989 errorBelch("%s: unhandled ELF relocation(Rel) type %lu\n",
3990 oc->fileName, (lnat)ELF_R_TYPE(info));
3998 /* Do ELF relocations for which explicit addends are supplied.
3999 sparc-solaris relocations appear to be of this form. */
4001 do_Elf_Rela_relocations ( ObjectCode* oc, char* ehdrC,
4002 Elf_Shdr* shdr, int shnum,
4003 Elf_Sym* stab, char* strtab )
4006 char *symbol = NULL;
4008 Elf_Rela* rtab = (Elf_Rela*) (ehdrC + shdr[shnum].sh_offset);
4009 int nent = shdr[shnum].sh_size / sizeof(Elf_Rela);
4010 int target_shndx = shdr[shnum].sh_info;
4011 int symtab_shndx = shdr[shnum].sh_link;
4013 stab = (Elf_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
4014 targ = (Elf_Addr) (ehdrC + shdr[ target_shndx ].sh_offset);
4015 IF_DEBUG(linker,debugBelch( "relocations for section %d using symtab %d\n",
4016 target_shndx, symtab_shndx ));
4018 for (j = 0; j < nent; j++) {
4019 #if defined(DEBUG) || defined(sparc_HOST_ARCH) || defined(ia64_HOST_ARCH) || defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
4020 /* This #ifdef only serves to avoid unused-var warnings. */
4021 Elf_Addr offset = rtab[j].r_offset;
4022 Elf_Addr P = targ + offset;
4024 Elf_Addr info = rtab[j].r_info;
4025 Elf_Addr A = rtab[j].r_addend;
4029 # if defined(sparc_HOST_ARCH)
4030 Elf_Word* pP = (Elf_Word*)P;
4032 # elif defined(powerpc_HOST_ARCH)
4036 IF_DEBUG(linker,debugBelch( "Rel entry %3d is raw(%6p %6p %6p) ",
4037 j, (void*)offset, (void*)info,
4040 IF_DEBUG(linker,debugBelch( " ZERO" ));
4043 Elf_Sym sym = stab[ELF_R_SYM(info)];
4044 /* First see if it is a local symbol. */
4045 if (ELF_ST_BIND(sym.st_info) == STB_LOCAL) {
4046 /* Yes, so we can get the address directly from the ELF symbol
4048 symbol = sym.st_name==0 ? "(noname)" : strtab+sym.st_name;
4050 (ehdrC + shdr[ sym.st_shndx ].sh_offset
4051 + stab[ELF_R_SYM(info)].st_value);
4052 #ifdef ELF_FUNCTION_DESC
4053 /* Make a function descriptor for this function */
4054 if (S && ELF_ST_TYPE(sym.st_info) == STT_FUNC) {
4055 S = allocateFunctionDesc(S + A);
4060 /* No, so look up the name in our global table. */
4061 symbol = strtab + sym.st_name;
4062 S_tmp = lookupSymbol( symbol );
4063 S = (Elf_Addr)S_tmp;
4065 #ifdef ELF_FUNCTION_DESC
4066 /* If a function, already a function descriptor - we would
4067 have to copy it to add an offset. */
4068 if (S && (ELF_ST_TYPE(sym.st_info) == STT_FUNC) && (A != 0))
4069 errorBelch("%s: function %s with addend %p", oc->fileName, symbol, (void *)A);
4073 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
4076 IF_DEBUG(linker,debugBelch( "`%s' resolves to %p", symbol, (void*)S ));
4079 IF_DEBUG(linker,debugBelch("Reloc: P = %p S = %p A = %p\n",
4080 (void*)P, (void*)S, (void*)A ));
4081 /* checkProddableBlock ( oc, (void*)P ); */
4085 switch (ELF_R_TYPE(info)) {
4086 # if defined(sparc_HOST_ARCH)
4087 case R_SPARC_WDISP30:
4088 w1 = *pP & 0xC0000000;
4089 w2 = (Elf_Word)((value - P) >> 2);
4090 ASSERT((w2 & 0xC0000000) == 0);
4095 w1 = *pP & 0xFFC00000;
4096 w2 = (Elf_Word)(value >> 10);
4097 ASSERT((w2 & 0xFFC00000) == 0);
4103 w2 = (Elf_Word)(value & 0x3FF);
4104 ASSERT((w2 & ~0x3FF) == 0);
4109 /* According to the Sun documentation:
4111 This relocation type resembles R_SPARC_32, except it refers to an
4112 unaligned word. That is, the word to be relocated must be treated
4113 as four separate bytes with arbitrary alignment, not as a word
4114 aligned according to the architecture requirements.
4117 w2 = (Elf_Word)value;
4119 // SPARC doesn't do misaligned writes of 32 bit words,
4120 // so we have to do this one byte-at-a-time.
4121 char *pPc = (char*)pP;
4122 pPc[0] = (char) ((Elf_Word)(w2 & 0xff000000) >> 24);
4123 pPc[1] = (char) ((Elf_Word)(w2 & 0x00ff0000) >> 16);
4124 pPc[2] = (char) ((Elf_Word)(w2 & 0x0000ff00) >> 8);
4125 pPc[3] = (char) ((Elf_Word)(w2 & 0x000000ff));
4129 w2 = (Elf_Word)value;
4132 # elif defined(powerpc_HOST_ARCH)
4133 case R_PPC_ADDR16_LO:
4134 *(Elf32_Half*) P = value;
4137 case R_PPC_ADDR16_HI:
4138 *(Elf32_Half*) P = value >> 16;
4141 case R_PPC_ADDR16_HA:
4142 *(Elf32_Half*) P = (value + 0x8000) >> 16;
4146 *(Elf32_Word *) P = value;
4150 *(Elf32_Word *) P = value - P;
4156 if( delta << 6 >> 6 != delta )
4158 value = (Elf_Addr) (&makeSymbolExtra( oc, ELF_R_SYM(info), value )
4162 if( value == 0 || delta << 6 >> 6 != delta )
4164 barf( "Unable to make SymbolExtra for #%d",
4170 *(Elf_Word *) P = (*(Elf_Word *) P & 0xfc000003)
4171 | (delta & 0x3fffffc);
4175 #if x86_64_HOST_ARCH
4177 *(Elf64_Xword *)P = value;
4182 #if defined(ALWAYS_PIC)
4183 barf("R_X86_64_PC32 relocation, but ALWAYS_PIC.");
4185 StgInt64 off = value - P;
4186 if (off >= 0x7fffffffL || off < -0x80000000L) {
4187 #if X86_64_ELF_NONPIC_HACK
4188 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4190 off = pltAddress + A - P;
4192 barf("R_X86_64_PC32 relocation out of range: %s = %p\nRecompile %s with -fPIC.",
4193 symbol, off, oc->fileName );
4196 *(Elf64_Word *)P = (Elf64_Word)off;
4203 StgInt64 off = value - P;
4204 *(Elf64_Word *)P = (Elf64_Word)off;
4209 #if defined(ALWAYS_PIC)
4210 barf("R_X86_64_32 relocation, but ALWAYS_PIC.");
4212 if (value >= 0x7fffffffL) {
4213 #if X86_64_ELF_NONPIC_HACK
4214 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4216 value = pltAddress + A;
4218 barf("R_X86_64_32 relocation out of range: %s = %p\nRecompile %s with -fPIC.",
4219 symbol, value, oc->fileName );
4222 *(Elf64_Word *)P = (Elf64_Word)value;
4227 #if defined(ALWAYS_PIC)
4228 barf("R_X86_64_32S relocation, but ALWAYS_PIC.");
4230 if ((StgInt64)value > 0x7fffffffL || (StgInt64)value < -0x80000000L) {
4231 #if X86_64_ELF_NONPIC_HACK
4232 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4234 value = pltAddress + A;
4236 barf("R_X86_64_32S relocation out of range: %s = %p\nRecompile %s with -fPIC.",
4237 symbol, value, oc->fileName );
4240 *(Elf64_Sword *)P = (Elf64_Sword)value;
4244 case R_X86_64_GOTPCREL:
4246 StgInt64 gotAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)->addr;
4247 StgInt64 off = gotAddress + A - P;
4248 *(Elf64_Word *)P = (Elf64_Word)off;
4252 case R_X86_64_PLT32:
4254 #if defined(ALWAYS_PIC)
4255 barf("R_X86_64_PLT32 relocation, but ALWAYS_PIC.");
4257 StgInt64 off = value - P;
4258 if (off >= 0x7fffffffL || off < -0x80000000L) {
4259 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4261 off = pltAddress + A - P;
4263 *(Elf64_Word *)P = (Elf64_Word)off;
4270 errorBelch("%s: unhandled ELF relocation(RelA) type %lu\n",
4271 oc->fileName, (lnat)ELF_R_TYPE(info));
4280 ocResolve_ELF ( ObjectCode* oc )
4284 Elf_Sym* stab = NULL;
4285 char* ehdrC = (char*)(oc->image);
4286 Elf_Ehdr* ehdr = (Elf_Ehdr*) ehdrC;
4287 Elf_Shdr* shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
4289 /* first find "the" symbol table */
4290 stab = (Elf_Sym*) findElfSection ( ehdrC, SHT_SYMTAB );
4292 /* also go find the string table */
4293 strtab = findElfSection ( ehdrC, SHT_STRTAB );
4295 if (stab == NULL || strtab == NULL) {
4296 errorBelch("%s: can't find string or symbol table", oc->fileName);
4300 /* Process the relocation sections. */
4301 for (shnum = 0; shnum < ehdr->e_shnum; shnum++) {
4302 if (shdr[shnum].sh_type == SHT_REL) {
4303 ok = do_Elf_Rel_relocations ( oc, ehdrC, shdr,
4304 shnum, stab, strtab );
4308 if (shdr[shnum].sh_type == SHT_RELA) {
4309 ok = do_Elf_Rela_relocations ( oc, ehdrC, shdr,
4310 shnum, stab, strtab );
4315 #if defined(powerpc_HOST_ARCH)
4316 ocFlushInstructionCache( oc );
4323 * PowerPC & X86_64 ELF specifics
4326 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
4328 static int ocAllocateSymbolExtras_ELF( ObjectCode *oc )
4334 ehdr = (Elf_Ehdr *) oc->image;
4335 shdr = (Elf_Shdr *) ( ((char *)oc->image) + ehdr->e_shoff );
4337 for( i = 0; i < ehdr->e_shnum; i++ )
4338 if( shdr[i].sh_type == SHT_SYMTAB )
4341 if( i == ehdr->e_shnum )
4343 errorBelch( "This ELF file contains no symtab" );
4347 if( shdr[i].sh_entsize != sizeof( Elf_Sym ) )
4349 errorBelch( "The entry size (%d) of the symtab isn't %d\n",
4350 (int) shdr[i].sh_entsize, (int) sizeof( Elf_Sym ) );
4355 return ocAllocateSymbolExtras( oc, shdr[i].sh_size / sizeof( Elf_Sym ), 0 );
4358 #endif /* powerpc */
4362 /* --------------------------------------------------------------------------
4364 * ------------------------------------------------------------------------*/
4366 #if defined(OBJFORMAT_MACHO)
4369 Support for MachO linking on Darwin/MacOS X
4370 by Wolfgang Thaller (wolfgang.thaller@gmx.net)
4372 I hereby formally apologize for the hackish nature of this code.
4373 Things that need to be done:
4374 *) implement ocVerifyImage_MachO
4375 *) add still more sanity checks.
4378 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
4379 #define mach_header mach_header_64
4380 #define segment_command segment_command_64
4381 #define section section_64
4382 #define nlist nlist_64
4385 #ifdef powerpc_HOST_ARCH
4386 static int ocAllocateSymbolExtras_MachO(ObjectCode* oc)
4388 struct mach_header *header = (struct mach_header *) oc->image;
4389 struct load_command *lc = (struct load_command *) (header + 1);
4392 for( i = 0; i < header->ncmds; i++ )
4394 if( lc->cmd == LC_SYMTAB )
4396 // Find out the first and last undefined external
4397 // symbol, so we don't have to allocate too many
4399 struct symtab_command *symLC = (struct symtab_command *) lc;
4400 unsigned min = symLC->nsyms, max = 0;
4401 struct nlist *nlist =
4402 symLC ? (struct nlist*) ((char*) oc->image + symLC->symoff)
4404 for(i=0;i<symLC->nsyms;i++)
4406 if(nlist[i].n_type & N_STAB)
4408 else if(nlist[i].n_type & N_EXT)
4410 if((nlist[i].n_type & N_TYPE) == N_UNDF
4411 && (nlist[i].n_value == 0))
4421 return ocAllocateSymbolExtras(oc, max - min + 1, min);
4426 lc = (struct load_command *) ( ((char *)lc) + lc->cmdsize );
4428 return ocAllocateSymbolExtras(oc,0,0);
4431 #ifdef x86_64_HOST_ARCH
4432 static int ocAllocateSymbolExtras_MachO(ObjectCode* oc)
4434 struct mach_header *header = (struct mach_header *) oc->image;
4435 struct load_command *lc = (struct load_command *) (header + 1);
4438 for( i = 0; i < header->ncmds; i++ )
4440 if( lc->cmd == LC_SYMTAB )
4442 // Just allocate one entry for every symbol
4443 struct symtab_command *symLC = (struct symtab_command *) lc;
4445 return ocAllocateSymbolExtras(oc, symLC->nsyms, 0);
4448 lc = (struct load_command *) ( ((char *)lc) + lc->cmdsize );
4450 return ocAllocateSymbolExtras(oc,0,0);
4454 static int ocVerifyImage_MachO(ObjectCode* oc)
4456 char *image = (char*) oc->image;
4457 struct mach_header *header = (struct mach_header*) image;
4459 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
4460 if(header->magic != MH_MAGIC_64) {
4461 errorBelch("%s: Bad magic. Expected: %08x, got: %08x.\n",
4462 oc->fileName, MH_MAGIC_64, header->magic);
4466 if(header->magic != MH_MAGIC) {
4467 errorBelch("%s: Bad magic. Expected: %08x, got: %08x.\n",
4468 oc->fileName, MH_MAGIC, header->magic);
4472 // FIXME: do some more verifying here
4476 static int resolveImports(
4479 struct symtab_command *symLC,
4480 struct section *sect, // ptr to lazy or non-lazy symbol pointer section
4481 unsigned long *indirectSyms,
4482 struct nlist *nlist)
4485 size_t itemSize = 4;
4487 IF_DEBUG(linker, debugBelch("resolveImports: start\n"));
4490 int isJumpTable = 0;
4491 if(!strcmp(sect->sectname,"__jump_table"))
4495 ASSERT(sect->reserved2 == itemSize);
4499 for(i=0; i*itemSize < sect->size;i++)
4501 // according to otool, reserved1 contains the first index into the indirect symbol table
4502 struct nlist *symbol = &nlist[indirectSyms[sect->reserved1+i]];
4503 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4506 IF_DEBUG(linker, debugBelch("resolveImports: resolving %s\n", nm));
4507 if ((symbol->n_type & N_TYPE) == N_UNDF
4508 && (symbol->n_type & N_EXT) && (symbol->n_value != 0)) {
4509 addr = (void*) (symbol->n_value);
4510 IF_DEBUG(linker, debugBelch("resolveImports: undefined external %s has value %p\n", nm, addr));
4512 addr = lookupSymbol(nm);
4513 IF_DEBUG(linker, debugBelch("resolveImports: looking up %s, %p\n", nm, addr));
4517 errorBelch("\n%s: unknown symbol `%s'", oc->fileName, nm);
4525 checkProddableBlock(oc,image + sect->offset + i*itemSize);
4526 *(image + sect->offset + i*itemSize) = 0xe9; // jmp
4527 *(unsigned*)(image + sect->offset + i*itemSize + 1)
4528 = (char*)addr - (image + sect->offset + i*itemSize + 5);
4533 checkProddableBlock(oc,((void**)(image + sect->offset)) + i);
4534 ((void**)(image + sect->offset))[i] = addr;
4538 IF_DEBUG(linker, debugBelch("resolveImports: done\n"));
4542 static unsigned long relocateAddress(
4545 struct section* sections,
4546 unsigned long address)
4549 IF_DEBUG(linker, debugBelch("relocateAddress: start\n"));
4550 for (i = 0; i < nSections; i++)
4552 IF_DEBUG(linker, debugBelch(" relocating address in section %d\n", i));
4553 if (sections[i].addr <= address
4554 && address < sections[i].addr + sections[i].size)
4556 return (unsigned long)oc->image
4557 + sections[i].offset + address - sections[i].addr;
4560 barf("Invalid Mach-O file:"
4561 "Address out of bounds while relocating object file");
4565 static int relocateSection(
4568 struct symtab_command *symLC, struct nlist *nlist,
4569 int nSections, struct section* sections, struct section *sect)
4571 struct relocation_info *relocs;
4574 IF_DEBUG(linker, debugBelch("relocateSection: start\n"));
4576 if(!strcmp(sect->sectname,"__la_symbol_ptr"))
4578 else if(!strcmp(sect->sectname,"__nl_symbol_ptr"))
4580 else if(!strcmp(sect->sectname,"__la_sym_ptr2"))
4582 else if(!strcmp(sect->sectname,"__la_sym_ptr3"))
4586 IF_DEBUG(linker, debugBelch("relocateSection: number of relocations: %d\n", n));
4588 relocs = (struct relocation_info*) (image + sect->reloff);
4592 #ifdef x86_64_HOST_ARCH
4593 struct relocation_info *reloc = &relocs[i];
4595 char *thingPtr = image + sect->offset + reloc->r_address;
4597 /* We shouldn't need to initialise this, but gcc on OS X 64 bit
4598 complains that it may be used uninitialized if we don't */
4601 int type = reloc->r_type;
4603 checkProddableBlock(oc,thingPtr);
4604 switch(reloc->r_length)
4607 thing = *(uint8_t*)thingPtr;
4608 baseValue = (uint64_t)thingPtr + 1;
4611 thing = *(uint16_t*)thingPtr;
4612 baseValue = (uint64_t)thingPtr + 2;
4615 thing = *(uint32_t*)thingPtr;
4616 baseValue = (uint64_t)thingPtr + 4;
4619 thing = *(uint64_t*)thingPtr;
4620 baseValue = (uint64_t)thingPtr + 8;
4623 barf("Unknown size.");
4627 debugBelch("relocateSection: length = %d, thing = %d, baseValue = %p\n",
4628 reloc->r_length, thing, baseValue));
4630 if (type == X86_64_RELOC_GOT
4631 || type == X86_64_RELOC_GOT_LOAD)
4633 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4634 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4636 IF_DEBUG(linker, debugBelch("relocateSection: making jump island for %s, extern = %d, X86_64_RELOC_GOT\n", nm, reloc->r_extern));
4637 ASSERT(reloc->r_extern);
4638 value = (uint64_t) &makeSymbolExtra(oc, reloc->r_symbolnum, (unsigned long)lookupSymbol(nm))->addr;
4640 type = X86_64_RELOC_SIGNED;
4642 else if(reloc->r_extern)
4644 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4645 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4647 IF_DEBUG(linker, debugBelch("relocateSection: looking up external symbol %s\n", nm));
4648 IF_DEBUG(linker, debugBelch(" : type = %d\n", symbol->n_type));
4649 IF_DEBUG(linker, debugBelch(" : sect = %d\n", symbol->n_sect));
4650 IF_DEBUG(linker, debugBelch(" : desc = %d\n", symbol->n_desc));
4651 IF_DEBUG(linker, debugBelch(" : value = %d\n", symbol->n_value));
4652 if ((symbol->n_type & N_TYPE) == N_SECT) {
4653 value = relocateAddress(oc, nSections, sections,
4655 IF_DEBUG(linker, debugBelch("relocateSection, defined external symbol %s, relocated address %p\n", nm, value));
4658 value = (uint64_t) lookupSymbol(nm);
4659 IF_DEBUG(linker, debugBelch("relocateSection: external symbol %s, address %p\n", nm, value));
4664 value = sections[reloc->r_symbolnum-1].offset
4665 - sections[reloc->r_symbolnum-1].addr
4669 IF_DEBUG(linker, debugBelch("relocateSection: value = %p\n", value));
4671 if (type == X86_64_RELOC_BRANCH)
4673 if((int32_t)(value - baseValue) != (int64_t)(value - baseValue))
4675 ASSERT(reloc->r_extern);
4676 value = (uint64_t) &makeSymbolExtra(oc, reloc->r_symbolnum, value)
4679 ASSERT((int32_t)(value - baseValue) == (int64_t)(value - baseValue));
4680 type = X86_64_RELOC_SIGNED;
4685 case X86_64_RELOC_UNSIGNED:
4686 ASSERT(!reloc->r_pcrel);
4689 case X86_64_RELOC_SIGNED:
4690 case X86_64_RELOC_SIGNED_1:
4691 case X86_64_RELOC_SIGNED_2:
4692 case X86_64_RELOC_SIGNED_4:
4693 ASSERT(reloc->r_pcrel);
4694 thing += value - baseValue;
4696 case X86_64_RELOC_SUBTRACTOR:
4697 ASSERT(!reloc->r_pcrel);
4701 barf("unkown relocation");
4704 switch(reloc->r_length)
4707 *(uint8_t*)thingPtr = thing;
4710 *(uint16_t*)thingPtr = thing;
4713 *(uint32_t*)thingPtr = thing;
4716 *(uint64_t*)thingPtr = thing;
4720 if(relocs[i].r_address & R_SCATTERED)
4722 struct scattered_relocation_info *scat =
4723 (struct scattered_relocation_info*) &relocs[i];
4727 if(scat->r_length == 2)
4729 unsigned long word = 0;
4730 unsigned long* wordPtr = (unsigned long*) (image + sect->offset + scat->r_address);
4731 checkProddableBlock(oc,wordPtr);
4733 // Note on relocation types:
4734 // i386 uses the GENERIC_RELOC_* types,
4735 // while ppc uses special PPC_RELOC_* types.
4736 // *_RELOC_VANILLA and *_RELOC_PAIR have the same value
4737 // in both cases, all others are different.
4738 // Therefore, we use GENERIC_RELOC_VANILLA
4739 // and GENERIC_RELOC_PAIR instead of the PPC variants,
4740 // and use #ifdefs for the other types.
4742 // Step 1: Figure out what the relocated value should be
4743 if(scat->r_type == GENERIC_RELOC_VANILLA)
4745 word = *wordPtr + (unsigned long) relocateAddress(
4752 #ifdef powerpc_HOST_ARCH
4753 else if(scat->r_type == PPC_RELOC_SECTDIFF
4754 || scat->r_type == PPC_RELOC_LO16_SECTDIFF
4755 || scat->r_type == PPC_RELOC_HI16_SECTDIFF
4756 || scat->r_type == PPC_RELOC_HA16_SECTDIFF
4757 || scat->r_type == PPC_RELOC_LOCAL_SECTDIFF)
4759 else if(scat->r_type == GENERIC_RELOC_SECTDIFF
4760 || scat->r_type == GENERIC_RELOC_LOCAL_SECTDIFF)
4763 struct scattered_relocation_info *pair =
4764 (struct scattered_relocation_info*) &relocs[i+1];
4766 if(!pair->r_scattered || pair->r_type != GENERIC_RELOC_PAIR)
4767 barf("Invalid Mach-O file: "
4768 "RELOC_*_SECTDIFF not followed by RELOC_PAIR");
4770 word = (unsigned long)
4771 (relocateAddress(oc, nSections, sections, scat->r_value)
4772 - relocateAddress(oc, nSections, sections, pair->r_value));
4775 #ifdef powerpc_HOST_ARCH
4776 else if(scat->r_type == PPC_RELOC_HI16
4777 || scat->r_type == PPC_RELOC_LO16
4778 || scat->r_type == PPC_RELOC_HA16
4779 || scat->r_type == PPC_RELOC_LO14)
4780 { // these are generated by label+offset things
4781 struct relocation_info *pair = &relocs[i+1];
4782 if((pair->r_address & R_SCATTERED) || pair->r_type != PPC_RELOC_PAIR)
4783 barf("Invalid Mach-O file: "
4784 "PPC_RELOC_* not followed by PPC_RELOC_PAIR");
4786 if(scat->r_type == PPC_RELOC_LO16)
4788 word = ((unsigned short*) wordPtr)[1];
4789 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4791 else if(scat->r_type == PPC_RELOC_LO14)
4793 barf("Unsupported Relocation: PPC_RELOC_LO14");
4794 word = ((unsigned short*) wordPtr)[1] & 0xFFFC;
4795 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4797 else if(scat->r_type == PPC_RELOC_HI16)
4799 word = ((unsigned short*) wordPtr)[1] << 16;
4800 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF);
4802 else if(scat->r_type == PPC_RELOC_HA16)
4804 word = ((unsigned short*) wordPtr)[1] << 16;
4805 word += ((short)relocs[i+1].r_address & (short)0xFFFF);
4809 word += (unsigned long) relocateAddress(oc, nSections, sections, scat->r_value)
4817 barf ("Don't know how to handle this Mach-O "
4818 "scattered relocation entry: "
4819 "object file %s; entry type %ld; "
4821 OC_INFORMATIVE_FILENAME(oc),
4827 #ifdef powerpc_HOST_ARCH
4828 if(scat->r_type == GENERIC_RELOC_VANILLA
4829 || scat->r_type == PPC_RELOC_SECTDIFF)
4831 if(scat->r_type == GENERIC_RELOC_VANILLA
4832 || scat->r_type == GENERIC_RELOC_SECTDIFF
4833 || scat->r_type == GENERIC_RELOC_LOCAL_SECTDIFF)
4838 #ifdef powerpc_HOST_ARCH
4839 else if(scat->r_type == PPC_RELOC_LO16_SECTDIFF || scat->r_type == PPC_RELOC_LO16)
4841 ((unsigned short*) wordPtr)[1] = word & 0xFFFF;
4843 else if(scat->r_type == PPC_RELOC_HI16_SECTDIFF || scat->r_type == PPC_RELOC_HI16)
4845 ((unsigned short*) wordPtr)[1] = (word >> 16) & 0xFFFF;
4847 else if(scat->r_type == PPC_RELOC_HA16_SECTDIFF || scat->r_type == PPC_RELOC_HA16)
4849 ((unsigned short*) wordPtr)[1] = ((word >> 16) & 0xFFFF)
4850 + ((word & (1<<15)) ? 1 : 0);
4856 barf("Can't handle Mach-O scattered relocation entry "
4857 "with this r_length tag: "
4858 "object file %s; entry type %ld; "
4859 "r_length tag %ld; address %#lx\n",
4860 OC_INFORMATIVE_FILENAME(oc),
4867 else /* scat->r_pcrel */
4869 barf("Don't know how to handle *PC-relative* Mach-O "
4870 "scattered relocation entry: "
4871 "object file %s; entry type %ld; address %#lx\n",
4872 OC_INFORMATIVE_FILENAME(oc),
4879 else /* !(relocs[i].r_address & R_SCATTERED) */
4881 struct relocation_info *reloc = &relocs[i];
4882 if(reloc->r_pcrel && !reloc->r_extern)
4885 if(reloc->r_length == 2)
4887 unsigned long word = 0;
4888 #ifdef powerpc_HOST_ARCH
4889 unsigned long jumpIsland = 0;
4890 long offsetToJumpIsland = 0xBADBAD42; // initialise to bad value
4891 // to avoid warning and to catch
4895 unsigned long* wordPtr = (unsigned long*) (image + sect->offset + reloc->r_address);
4896 checkProddableBlock(oc,wordPtr);
4898 if(reloc->r_type == GENERIC_RELOC_VANILLA)
4902 #ifdef powerpc_HOST_ARCH
4903 else if(reloc->r_type == PPC_RELOC_LO16)
4905 word = ((unsigned short*) wordPtr)[1];
4906 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4908 else if(reloc->r_type == PPC_RELOC_HI16)
4910 word = ((unsigned short*) wordPtr)[1] << 16;
4911 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF);
4913 else if(reloc->r_type == PPC_RELOC_HA16)
4915 word = ((unsigned short*) wordPtr)[1] << 16;
4916 word += ((short)relocs[i+1].r_address & (short)0xFFFF);
4918 else if(reloc->r_type == PPC_RELOC_BR24)
4921 word = (word & 0x03FFFFFC) | ((word & 0x02000000) ? 0xFC000000 : 0);
4926 barf("Can't handle this Mach-O relocation entry "
4928 "object file %s; entry type %ld; address %#lx\n",
4929 OC_INFORMATIVE_FILENAME(oc),
4935 if(!reloc->r_extern)
4938 sections[reloc->r_symbolnum-1].offset
4939 - sections[reloc->r_symbolnum-1].addr
4946 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4947 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4948 void *symbolAddress = lookupSymbol(nm);
4951 errorBelch("\nunknown symbol `%s'", nm);
4957 #ifdef powerpc_HOST_ARCH
4958 // In the .o file, this should be a relative jump to NULL
4959 // and we'll change it to a relative jump to the symbol
4960 ASSERT(word + reloc->r_address == 0);
4961 jumpIsland = (unsigned long)
4962 &makeSymbolExtra(oc,
4964 (unsigned long) symbolAddress)
4968 offsetToJumpIsland = word + jumpIsland
4969 - (((long)image) + sect->offset - sect->addr);
4972 word += (unsigned long) symbolAddress
4973 - (((long)image) + sect->offset - sect->addr);
4977 word += (unsigned long) symbolAddress;
4981 if(reloc->r_type == GENERIC_RELOC_VANILLA)
4986 #ifdef powerpc_HOST_ARCH
4987 else if(reloc->r_type == PPC_RELOC_LO16)
4989 ((unsigned short*) wordPtr)[1] = word & 0xFFFF;
4992 else if(reloc->r_type == PPC_RELOC_HI16)
4994 ((unsigned short*) wordPtr)[1] = (word >> 16) & 0xFFFF;
4997 else if(reloc->r_type == PPC_RELOC_HA16)
4999 ((unsigned short*) wordPtr)[1] = ((word >> 16) & 0xFFFF)
5000 + ((word & (1<<15)) ? 1 : 0);
5003 else if(reloc->r_type == PPC_RELOC_BR24)
5005 if((word & 0x03) != 0)
5006 barf("%s: unconditional relative branch with a displacement "
5007 "which isn't a multiple of 4 bytes: %#lx",
5008 OC_INFORMATIVE_FILENAME(oc),
5011 if((word & 0xFE000000) != 0xFE000000 &&
5012 (word & 0xFE000000) != 0x00000000)
5014 // The branch offset is too large.
5015 // Therefore, we try to use a jump island.
5018 barf("%s: unconditional relative branch out of range: "
5019 "no jump island available: %#lx",
5020 OC_INFORMATIVE_FILENAME(oc),
5024 word = offsetToJumpIsland;
5025 if((word & 0xFE000000) != 0xFE000000 &&
5026 (word & 0xFE000000) != 0x00000000)
5027 barf("%s: unconditional relative branch out of range: "
5028 "jump island out of range: %#lx",
5029 OC_INFORMATIVE_FILENAME(oc),
5032 *wordPtr = (*wordPtr & 0xFC000003) | (word & 0x03FFFFFC);
5039 barf("Can't handle Mach-O relocation entry (not scattered) "
5040 "with this r_length tag: "
5041 "object file %s; entry type %ld; "
5042 "r_length tag %ld; address %#lx\n",
5043 OC_INFORMATIVE_FILENAME(oc),
5052 IF_DEBUG(linker, debugBelch("relocateSection: done\n"));
5056 static int ocGetNames_MachO(ObjectCode* oc)
5058 char *image = (char*) oc->image;
5059 struct mach_header *header = (struct mach_header*) image;
5060 struct load_command *lc = (struct load_command*) (image + sizeof(struct mach_header));
5061 unsigned i,curSymbol = 0;
5062 struct segment_command *segLC = NULL;
5063 struct section *sections;
5064 struct symtab_command *symLC = NULL;
5065 struct nlist *nlist;
5066 unsigned long commonSize = 0;
5067 char *commonStorage = NULL;
5068 unsigned long commonCounter;
5070 IF_DEBUG(linker,debugBelch("ocGetNames_MachO: start\n"));
5072 for(i=0;i<header->ncmds;i++)
5074 if(lc->cmd == LC_SEGMENT || lc->cmd == LC_SEGMENT_64)
5075 segLC = (struct segment_command*) lc;
5076 else if(lc->cmd == LC_SYMTAB)
5077 symLC = (struct symtab_command*) lc;
5078 lc = (struct load_command *) ( ((char*)lc) + lc->cmdsize );
5081 sections = (struct section*) (segLC+1);
5082 nlist = symLC ? (struct nlist*) (image + symLC->symoff)
5086 barf("ocGetNames_MachO: no segment load command");
5088 for(i=0;i<segLC->nsects;i++)
5090 IF_DEBUG(linker, debugBelch("ocGetNames_MachO: segment %d\n", i));
5091 if (sections[i].size == 0)
5094 if((sections[i].flags & SECTION_TYPE) == S_ZEROFILL)
5096 char * zeroFillArea = stgCallocBytes(1,sections[i].size,
5097 "ocGetNames_MachO(common symbols)");
5098 sections[i].offset = zeroFillArea - image;
5101 if(!strcmp(sections[i].sectname,"__text"))
5102 addSection(oc, SECTIONKIND_CODE_OR_RODATA,
5103 (void*) (image + sections[i].offset),
5104 (void*) (image + sections[i].offset + sections[i].size));
5105 else if(!strcmp(sections[i].sectname,"__const"))
5106 addSection(oc, SECTIONKIND_RWDATA,
5107 (void*) (image + sections[i].offset),
5108 (void*) (image + sections[i].offset + sections[i].size));
5109 else if(!strcmp(sections[i].sectname,"__data"))
5110 addSection(oc, SECTIONKIND_RWDATA,
5111 (void*) (image + sections[i].offset),
5112 (void*) (image + sections[i].offset + sections[i].size));
5113 else if(!strcmp(sections[i].sectname,"__bss")
5114 || !strcmp(sections[i].sectname,"__common"))
5115 addSection(oc, SECTIONKIND_RWDATA,
5116 (void*) (image + sections[i].offset),
5117 (void*) (image + sections[i].offset + sections[i].size));
5119 addProddableBlock(oc, (void*) (image + sections[i].offset),
5123 // count external symbols defined here
5127 for(i=0;i<symLC->nsyms;i++)
5129 if(nlist[i].n_type & N_STAB)
5131 else if(nlist[i].n_type & N_EXT)
5133 if((nlist[i].n_type & N_TYPE) == N_UNDF
5134 && (nlist[i].n_value != 0))
5136 commonSize += nlist[i].n_value;
5139 else if((nlist[i].n_type & N_TYPE) == N_SECT)
5144 IF_DEBUG(linker, debugBelch("ocGetNames_MachO: %d external symbols\n", oc->n_symbols));
5145 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
5146 "ocGetNames_MachO(oc->symbols)");
5150 for(i=0;i<symLC->nsyms;i++)
5152 if(nlist[i].n_type & N_STAB)
5154 else if((nlist[i].n_type & N_TYPE) == N_SECT)
5156 if(nlist[i].n_type & N_EXT)
5158 char *nm = image + symLC->stroff + nlist[i].n_un.n_strx;
5159 if ((nlist[i].n_desc & N_WEAK_DEF) && lookupSymbol(nm)) {
5160 // weak definition, and we already have a definition
5161 IF_DEBUG(linker, debugBelch(" weak: %s\n", nm));
5165 IF_DEBUG(linker, debugBelch("ocGetNames_MachO: inserting %s\n", nm));
5166 ghciInsertStrHashTable(oc->fileName, symhash, nm,
5168 + sections[nlist[i].n_sect-1].offset
5169 - sections[nlist[i].n_sect-1].addr
5170 + nlist[i].n_value);
5171 oc->symbols[curSymbol++] = nm;
5178 commonStorage = stgCallocBytes(1,commonSize,"ocGetNames_MachO(common symbols)");
5179 commonCounter = (unsigned long)commonStorage;
5182 for(i=0;i<symLC->nsyms;i++)
5184 if((nlist[i].n_type & N_TYPE) == N_UNDF
5185 && (nlist[i].n_type & N_EXT) && (nlist[i].n_value != 0))
5187 char *nm = image + symLC->stroff + nlist[i].n_un.n_strx;
5188 unsigned long sz = nlist[i].n_value;
5190 nlist[i].n_value = commonCounter;
5192 IF_DEBUG(linker, debugBelch("ocGetNames_MachO: inserting common symbol: %s\n", nm));
5193 ghciInsertStrHashTable(oc->fileName, symhash, nm,
5194 (void*)commonCounter);
5195 oc->symbols[curSymbol++] = nm;
5197 commonCounter += sz;
5204 static int ocResolve_MachO(ObjectCode* oc)
5206 char *image = (char*) oc->image;
5207 struct mach_header *header = (struct mach_header*) image;
5208 struct load_command *lc = (struct load_command*) (image + sizeof(struct mach_header));
5210 struct segment_command *segLC = NULL;
5211 struct section *sections;
5212 struct symtab_command *symLC = NULL;
5213 struct dysymtab_command *dsymLC = NULL;
5214 struct nlist *nlist;
5216 IF_DEBUG(linker, debugBelch("ocResolve_MachO: start\n"));
5217 for (i = 0; i < header->ncmds; i++)
5219 if(lc->cmd == LC_SEGMENT || lc->cmd == LC_SEGMENT_64)
5220 segLC = (struct segment_command*) lc;
5221 else if(lc->cmd == LC_SYMTAB)
5222 symLC = (struct symtab_command*) lc;
5223 else if(lc->cmd == LC_DYSYMTAB)
5224 dsymLC = (struct dysymtab_command*) lc;
5225 lc = (struct load_command *) ( ((char*)lc) + lc->cmdsize );
5228 sections = (struct section*) (segLC+1);
5229 nlist = symLC ? (struct nlist*) (image + symLC->symoff)
5234 unsigned long *indirectSyms
5235 = (unsigned long*) (image + dsymLC->indirectsymoff);
5237 IF_DEBUG(linker, debugBelch("ocResolve_MachO: resolving dsymLC\n"));
5238 for (i = 0; i < segLC->nsects; i++)
5240 if( !strcmp(sections[i].sectname,"__la_symbol_ptr")
5241 || !strcmp(sections[i].sectname,"__la_sym_ptr2")
5242 || !strcmp(sections[i].sectname,"__la_sym_ptr3"))
5244 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
5247 else if(!strcmp(sections[i].sectname,"__nl_symbol_ptr")
5248 || !strcmp(sections[i].sectname,"__pointers"))
5250 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
5253 else if(!strcmp(sections[i].sectname,"__jump_table"))
5255 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
5260 IF_DEBUG(linker, debugBelch("ocResolve_MachO: unknown section\n"));
5265 for(i=0;i<segLC->nsects;i++)
5267 IF_DEBUG(linker, debugBelch("ocResolve_MachO: relocating section %d\n", i));
5269 if (!relocateSection(oc,image,symLC,nlist,segLC->nsects,sections,§ions[i]))
5273 #if defined (powerpc_HOST_ARCH)
5274 ocFlushInstructionCache( oc );
5280 #ifdef powerpc_HOST_ARCH
5282 * The Mach-O object format uses leading underscores. But not everywhere.
5283 * There is a small number of runtime support functions defined in
5284 * libcc_dynamic.a whose name does not have a leading underscore.
5285 * As a consequence, we can't get their address from C code.
5286 * We have to use inline assembler just to take the address of a function.
5290 extern void* symbolsWithoutUnderscore[];
5292 static void machoInitSymbolsWithoutUnderscore()
5294 void **p = symbolsWithoutUnderscore;
5295 __asm__ volatile(".globl _symbolsWithoutUnderscore\n.data\n_symbolsWithoutUnderscore:");
5297 #undef SymI_NeedsProto
5298 #define SymI_NeedsProto(x) \
5299 __asm__ volatile(".long " # x);
5301 RTS_MACHO_NOUNDERLINE_SYMBOLS
5303 __asm__ volatile(".text");
5305 #undef SymI_NeedsProto
5306 #define SymI_NeedsProto(x) \
5307 ghciInsertStrHashTable("(GHCi built-in symbols)", symhash, #x, *p++);
5309 RTS_MACHO_NOUNDERLINE_SYMBOLS
5311 #undef SymI_NeedsProto
5317 * Figure out by how much to shift the entire Mach-O file in memory
5318 * when loading so that its single segment ends up 16-byte-aligned
5320 static int machoGetMisalignment( FILE * f )
5322 struct mach_header header;
5325 fread(&header, sizeof(header), 1, f);
5328 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
5329 if(header.magic != MH_MAGIC_64) {
5330 errorBelch("Bad magic. Expected: %08x, got: %08x.\n",
5331 MH_MAGIC_64, header->magic);
5335 if(header.magic != MH_MAGIC) {
5336 errorBelch("Bad magic. Expected: %08x, got: %08x.\n",
5337 MH_MAGIC, header->magic);
5342 misalignment = (header.sizeofcmds + sizeof(header))
5345 return misalignment ? (16 - misalignment) : 0;