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 */
1673 #if defined(USE_ARCHIVES_FOR_GHCI)
1675 loadArchive( char *path )
1682 size_t fileNameSize;
1688 IF_DEBUG(linker, debugBelch("loadArchive `%s'\n", path));
1691 file = stgMallocBytes(fileSize, "loadArchive(file)");
1693 f = fopen(path, "rb");
1695 barf("loadObj: can't read `%s'", path);
1697 n = fread ( tmp, 1, 8, f );
1698 if (strncmp(tmp, "!<arch>\n", 8) != 0)
1699 barf("loadArchive: Not an archive: `%s'", path);
1702 n = fread ( file, 1, 16, f );
1708 barf("loadArchive: Failed reading file name from `%s'", path);
1711 n = fread ( tmp, 1, 12, f );
1713 barf("loadArchive: Failed reading mod time from `%s'", path);
1714 n = fread ( tmp, 1, 6, f );
1716 barf("loadArchive: Failed reading owner from `%s'", path);
1717 n = fread ( tmp, 1, 6, f );
1719 barf("loadArchive: Failed reading group from `%s'", path);
1720 n = fread ( tmp, 1, 8, f );
1722 barf("loadArchive: Failed reading mode from `%s'", path);
1723 n = fread ( tmp, 1, 10, f );
1725 barf("loadArchive: Failed reading size from `%s'", path);
1727 for (n = 0; isdigit(tmp[n]); n++);
1729 imageSize = atoi(tmp);
1730 n = fread ( tmp, 1, 2, f );
1731 if (strncmp(tmp, "\x60\x0A", 2) != 0)
1732 barf("loadArchive: Failed reading magic from `%s' at %ld. Got %c%c", path, ftell(f), tmp[0], tmp[1]);
1734 /* Check for BSD-variant large filenames */
1735 if (0 == strncmp(file, "#1/", 3)) {
1737 for (n = 3; isdigit(file[n]); n++);
1739 fileNameSize = atoi(file + 3);
1740 imageSize -= fileNameSize;
1741 if (fileNameSize > fileSize) {
1742 /* Double it to avoid potentially continually
1743 increasing it by 1 */
1744 fileSize = fileNameSize * 2;
1745 file = stgReallocBytes(file, fileSize, "loadArchive(file)");
1747 n = fread ( file, 1, fileNameSize, f );
1748 if (n != (int)fileNameSize)
1749 barf("loadArchive: Failed reading filename from `%s'", path);
1756 for (n = 0; n < (int)fileNameSize - 1; n++) {
1757 if ((file[n] == '.') && (file[n + 1] == 'o')) {
1764 char *archiveMemberName;
1766 /* We can't mmap from the archive directly, as object
1767 files need to be 8-byte aligned but files in .ar
1768 archives are 2-byte aligned, and if we malloc the
1769 memory then we can be given memory above 2^32, so we
1770 mmap some anonymous memory and use that. We could
1772 image = mmapForLinker(imageSize, MAP_ANONYMOUS, -1);
1773 n = fread ( image, 1, imageSize, f );
1775 barf("loadObj: error whilst reading `%s'", path);
1777 archiveMemberName = stgMallocBytes(strlen(path) + fileNameSize + 3, "loadArchive(file)");
1778 sprintf(archiveMemberName, "%s(%.*s)", path, (int)fileNameSize, file);
1780 oc = mkOc(path, image, imageSize, archiveMemberName
1782 #ifdef darwin_HOST_OS
1788 stgFree(archiveMemberName);
1790 if (0 == loadOc(oc)) {
1796 n = fseek(f, imageSize, SEEK_CUR);
1798 barf("loadArchive: error whilst seeking by %d in `%s'",
1801 /* .ar files are 2-byte aligned */
1802 if (imageSize % 2) {
1803 n = fread ( tmp, 1, 1, f );
1809 barf("loadArchive: Failed reading padding from `%s'", path);
1821 HsInt GNU_ATTRIBUTE(__noreturn__)
1822 loadArchive( char *path STG_UNUSED ) {
1823 barf("loadArchive: not enabled");
1827 /* -----------------------------------------------------------------------------
1828 * Load an obj (populate the global symbol table, but don't resolve yet)
1830 * Returns: 1 if ok, 0 on error.
1833 loadObj( char *path )
1845 IF_DEBUG(linker, debugBelch("loadObj %s\n", path));
1849 /* debugBelch("loadObj %s\n", path ); */
1851 /* Check that we haven't already loaded this object.
1852 Ignore requests to load multiple times */
1856 for (o = objects; o; o = o->next) {
1857 if (0 == strcmp(o->fileName, path)) {
1859 break; /* don't need to search further */
1863 IF_DEBUG(linker, debugBelch(
1864 "GHCi runtime linker: warning: looks like you're trying to load the\n"
1865 "same object file twice:\n"
1867 "GHCi will ignore this, but be warned.\n"
1869 return 1; /* success */
1873 r = stat(path, &st);
1875 IF_DEBUG(linker, debugBelch("File doesn't exist\n"));
1879 fileSize = st.st_size;
1882 /* On many architectures malloc'd memory isn't executable, so we need to use mmap. */
1884 #if defined(openbsd_HOST_OS)
1885 fd = open(path, O_RDONLY, S_IRUSR);
1887 fd = open(path, O_RDONLY);
1890 barf("loadObj: can't open `%s'", path);
1892 image = mmapForLinker(fileSize, 0, fd);
1896 #else /* !USE_MMAP */
1897 /* load the image into memory */
1898 f = fopen(path, "rb");
1900 barf("loadObj: can't read `%s'", path);
1902 # if defined(mingw32_HOST_OS)
1903 // TODO: We would like to use allocateExec here, but allocateExec
1904 // cannot currently allocate blocks large enough.
1905 image = VirtualAlloc(NULL, fileSize, MEM_RESERVE | MEM_COMMIT,
1906 PAGE_EXECUTE_READWRITE);
1907 # elif defined(darwin_HOST_OS)
1908 // In a Mach-O .o file, all sections can and will be misaligned
1909 // if the total size of the headers is not a multiple of the
1910 // desired alignment. This is fine for .o files that only serve
1911 // as input for the static linker, but it's not fine for us,
1912 // as SSE (used by gcc for floating point) and Altivec require
1913 // 16-byte alignment.
1914 // We calculate the correct alignment from the header before
1915 // reading the file, and then we misalign image on purpose so
1916 // that the actual sections end up aligned again.
1917 misalignment = machoGetMisalignment(f);
1918 image = stgMallocBytes(fileSize + misalignment, "loadObj(image)");
1919 image += misalignment;
1921 image = stgMallocBytes(fileSize, "loadObj(image)");
1926 n = fread ( image, 1, fileSize, f );
1928 barf("loadObj: error whilst reading `%s'", path);
1931 #endif /* USE_MMAP */
1933 oc = mkOc(path, image, fileSize, NULL
1935 #ifdef darwin_HOST_OS
1945 loadOc( ObjectCode* oc ) {
1948 IF_DEBUG(linker, debugBelch("loadOc\n"));
1950 # if defined(OBJFORMAT_MACHO) && (defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH))
1951 r = ocAllocateSymbolExtras_MachO ( oc );
1953 IF_DEBUG(linker, debugBelch("ocAllocateSymbolExtras_MachO failed\n"));
1956 # elif defined(OBJFORMAT_ELF) && (defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH))
1957 r = ocAllocateSymbolExtras_ELF ( oc );
1959 IF_DEBUG(linker, debugBelch("ocAllocateSymbolExtras_ELF failed\n"));
1964 /* verify the in-memory image */
1965 # if defined(OBJFORMAT_ELF)
1966 r = ocVerifyImage_ELF ( oc );
1967 # elif defined(OBJFORMAT_PEi386)
1968 r = ocVerifyImage_PEi386 ( oc );
1969 # elif defined(OBJFORMAT_MACHO)
1970 r = ocVerifyImage_MachO ( oc );
1972 barf("loadObj: no verify method");
1975 IF_DEBUG(linker, debugBelch("ocVerifyImage_* failed\n"));
1979 /* build the symbol list for this image */
1980 # if defined(OBJFORMAT_ELF)
1981 r = ocGetNames_ELF ( oc );
1982 # elif defined(OBJFORMAT_PEi386)
1983 r = ocGetNames_PEi386 ( oc );
1984 # elif defined(OBJFORMAT_MACHO)
1985 r = ocGetNames_MachO ( oc );
1987 barf("loadObj: no getNames method");
1990 IF_DEBUG(linker, debugBelch("ocGetNames_* failed\n"));
1994 /* loaded, but not resolved yet */
1995 oc->status = OBJECT_LOADED;
1996 IF_DEBUG(linker, debugBelch("loadObj done.\n"));
2001 /* -----------------------------------------------------------------------------
2002 * resolve all the currently unlinked objects in memory
2004 * Returns: 1 if ok, 0 on error.
2012 IF_DEBUG(linker, debugBelch("resolveObjs: start\n"));
2015 for (oc = objects; oc; oc = oc->next) {
2016 if (oc->status != OBJECT_RESOLVED) {
2017 # if defined(OBJFORMAT_ELF)
2018 r = ocResolve_ELF ( oc );
2019 # elif defined(OBJFORMAT_PEi386)
2020 r = ocResolve_PEi386 ( oc );
2021 # elif defined(OBJFORMAT_MACHO)
2022 r = ocResolve_MachO ( oc );
2024 barf("resolveObjs: not implemented on this platform");
2026 if (!r) { return r; }
2027 oc->status = OBJECT_RESOLVED;
2030 IF_DEBUG(linker, debugBelch("resolveObjs: done\n"));
2034 /* -----------------------------------------------------------------------------
2035 * delete an object from the pool
2038 unloadObj( char *path )
2040 ObjectCode *oc, *prev;
2041 HsBool unloadedAnyObj = HS_BOOL_FALSE;
2043 ASSERT(symhash != NULL);
2044 ASSERT(objects != NULL);
2049 for (oc = objects; oc; prev = oc, oc = oc->next) {
2050 if (!strcmp(oc->fileName,path)) {
2052 /* Remove all the mappings for the symbols within this
2057 for (i = 0; i < oc->n_symbols; i++) {
2058 if (oc->symbols[i] != NULL) {
2059 removeStrHashTable(symhash, oc->symbols[i], NULL);
2067 prev->next = oc->next;
2070 // We're going to leave this in place, in case there are
2071 // any pointers from the heap into it:
2072 // #ifdef mingw32_HOST_OS
2073 // VirtualFree(oc->image);
2075 // stgFree(oc->image);
2077 stgFree(oc->fileName);
2078 stgFree(oc->symbols);
2079 stgFree(oc->sections);
2082 /* This could be a member of an archive so continue
2083 * unloading other members. */
2084 unloadedAnyObj = HS_BOOL_TRUE;
2088 if (unloadedAnyObj) {
2092 errorBelch("unloadObj: can't find `%s' to unload", path);
2097 /* -----------------------------------------------------------------------------
2098 * Sanity checking. For each ObjectCode, maintain a list of address ranges
2099 * which may be prodded during relocation, and abort if we try and write
2100 * outside any of these.
2102 static void addProddableBlock ( ObjectCode* oc, void* start, int size )
2105 = stgMallocBytes(sizeof(ProddableBlock), "addProddableBlock");
2106 IF_DEBUG(linker, debugBelch("addProddableBlock %p %p %d\n", oc, start, size));
2110 pb->next = oc->proddables;
2111 oc->proddables = pb;
2114 static void checkProddableBlock ( ObjectCode* oc, void* addr )
2117 for (pb = oc->proddables; pb != NULL; pb = pb->next) {
2118 char* s = (char*)(pb->start);
2119 char* e = s + pb->size - 1;
2120 char* a = (char*)addr;
2121 /* Assumes that the biggest fixup involves a 4-byte write. This
2122 probably needs to be changed to 8 (ie, +7) on 64-bit
2124 if (a >= s && (a+3) <= e) return;
2126 barf("checkProddableBlock: invalid fixup in runtime linker");
2129 /* -----------------------------------------------------------------------------
2130 * Section management.
2132 static void addSection ( ObjectCode* oc, SectionKind kind,
2133 void* start, void* end )
2135 Section* s = stgMallocBytes(sizeof(Section), "addSection");
2139 s->next = oc->sections;
2142 debugBelch("addSection: %p-%p (size %d), kind %d\n",
2143 start, ((char*)end)-1, end - start + 1, kind );
2148 /* --------------------------------------------------------------------------
2150 * This is about allocating a small chunk of memory for every symbol in the
2151 * object file. We make sure that the SymboLExtras are always "in range" of
2152 * limited-range PC-relative instructions on various platforms by allocating
2153 * them right next to the object code itself.
2156 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
2159 ocAllocateSymbolExtras
2161 Allocate additional space at the end of the object file image to make room
2162 for jump islands (powerpc, x86_64) and GOT entries (x86_64).
2164 PowerPC relative branch instructions have a 24 bit displacement field.
2165 As PPC code is always 4-byte-aligned, this yields a +-32MB range.
2166 If a particular imported symbol is outside this range, we have to redirect
2167 the jump to a short piece of new code that just loads the 32bit absolute
2168 address and jumps there.
2169 On x86_64, PC-relative jumps and PC-relative accesses to the GOT are limited
2172 This function just allocates space for one SymbolExtra for every
2173 undefined symbol in the object file. The code for the jump islands is
2174 filled in by makeSymbolExtra below.
2177 static int ocAllocateSymbolExtras( ObjectCode* oc, int count, int first )
2184 int misalignment = 0;
2185 #ifdef darwin_HOST_OS
2186 misalignment = oc->misalignment;
2192 // round up to the nearest 4
2193 aligned = (oc->fileSize + 3) & ~3;
2196 pagesize = getpagesize();
2197 n = ROUND_UP( oc->fileSize, pagesize );
2198 m = ROUND_UP( aligned + sizeof (SymbolExtra) * count, pagesize );
2200 /* we try to use spare space at the end of the last page of the
2201 * image for the jump islands, but if there isn't enough space
2202 * then we have to map some (anonymously, remembering MAP_32BIT).
2204 if( m > n ) // we need to allocate more pages
2206 oc->symbol_extras = mmapForLinker(sizeof(SymbolExtra) * count,
2211 oc->symbol_extras = (SymbolExtra *) (oc->image + aligned);
2214 oc->image -= misalignment;
2215 oc->image = stgReallocBytes( oc->image,
2217 aligned + sizeof (SymbolExtra) * count,
2218 "ocAllocateSymbolExtras" );
2219 oc->image += misalignment;
2221 oc->symbol_extras = (SymbolExtra *) (oc->image + aligned);
2222 #endif /* USE_MMAP */
2224 memset( oc->symbol_extras, 0, sizeof (SymbolExtra) * count );
2227 oc->symbol_extras = NULL;
2229 oc->first_symbol_extra = first;
2230 oc->n_symbol_extras = count;
2235 static SymbolExtra* makeSymbolExtra( ObjectCode* oc,
2236 unsigned long symbolNumber,
2237 unsigned long target )
2241 ASSERT( symbolNumber >= oc->first_symbol_extra
2242 && symbolNumber - oc->first_symbol_extra < oc->n_symbol_extras);
2244 extra = &oc->symbol_extras[symbolNumber - oc->first_symbol_extra];
2246 #ifdef powerpc_HOST_ARCH
2247 // lis r12, hi16(target)
2248 extra->jumpIsland.lis_r12 = 0x3d80;
2249 extra->jumpIsland.hi_addr = target >> 16;
2251 // ori r12, r12, lo16(target)
2252 extra->jumpIsland.ori_r12_r12 = 0x618c;
2253 extra->jumpIsland.lo_addr = target & 0xffff;
2256 extra->jumpIsland.mtctr_r12 = 0x7d8903a6;
2259 extra->jumpIsland.bctr = 0x4e800420;
2261 #ifdef x86_64_HOST_ARCH
2263 static uint8_t jmp[] = { 0xFF, 0x25, 0xF2, 0xFF, 0xFF, 0xFF };
2264 extra->addr = target;
2265 memcpy(extra->jumpIsland, jmp, 6);
2273 /* --------------------------------------------------------------------------
2274 * PowerPC specifics (instruction cache flushing)
2275 * ------------------------------------------------------------------------*/
2277 #ifdef powerpc_HOST_ARCH
2279 ocFlushInstructionCache
2281 Flush the data & instruction caches.
2282 Because the PPC has split data/instruction caches, we have to
2283 do that whenever we modify code at runtime.
2286 static void ocFlushInstructionCache( ObjectCode *oc )
2288 int n = (oc->fileSize + sizeof( SymbolExtra ) * oc->n_symbol_extras + 3) / 4;
2289 unsigned long *p = (unsigned long *) oc->image;
2293 __asm__ volatile ( "dcbf 0,%0\n\t"
2301 __asm__ volatile ( "sync\n\t"
2307 /* --------------------------------------------------------------------------
2308 * PEi386 specifics (Win32 targets)
2309 * ------------------------------------------------------------------------*/
2311 /* The information for this linker comes from
2312 Microsoft Portable Executable
2313 and Common Object File Format Specification
2314 revision 5.1 January 1998
2315 which SimonM says comes from the MS Developer Network CDs.
2317 It can be found there (on older CDs), but can also be found
2320 http://www.microsoft.com/hwdev/hardware/PECOFF.asp
2322 (this is Rev 6.0 from February 1999).
2324 Things move, so if that fails, try searching for it via
2326 http://www.google.com/search?q=PE+COFF+specification
2328 The ultimate reference for the PE format is the Winnt.h
2329 header file that comes with the Platform SDKs; as always,
2330 implementations will drift wrt their documentation.
2332 A good background article on the PE format is Matt Pietrek's
2333 March 1994 article in Microsoft System Journal (MSJ)
2334 (Vol.9, No. 3): "Peering Inside the PE: A Tour of the
2335 Win32 Portable Executable File Format." The info in there
2336 has recently been updated in a two part article in
2337 MSDN magazine, issues Feb and March 2002,
2338 "Inside Windows: An In-Depth Look into the Win32 Portable
2339 Executable File Format"
2341 John Levine's book "Linkers and Loaders" contains useful
2346 #if defined(OBJFORMAT_PEi386)
2350 typedef unsigned char UChar;
2351 typedef unsigned short UInt16;
2352 typedef unsigned int UInt32;
2359 UInt16 NumberOfSections;
2360 UInt32 TimeDateStamp;
2361 UInt32 PointerToSymbolTable;
2362 UInt32 NumberOfSymbols;
2363 UInt16 SizeOfOptionalHeader;
2364 UInt16 Characteristics;
2368 #define sizeof_COFF_header 20
2375 UInt32 VirtualAddress;
2376 UInt32 SizeOfRawData;
2377 UInt32 PointerToRawData;
2378 UInt32 PointerToRelocations;
2379 UInt32 PointerToLinenumbers;
2380 UInt16 NumberOfRelocations;
2381 UInt16 NumberOfLineNumbers;
2382 UInt32 Characteristics;
2386 #define sizeof_COFF_section 40
2393 UInt16 SectionNumber;
2396 UChar NumberOfAuxSymbols;
2400 #define sizeof_COFF_symbol 18
2405 UInt32 VirtualAddress;
2406 UInt32 SymbolTableIndex;
2411 #define sizeof_COFF_reloc 10
2414 /* From PE spec doc, section 3.3.2 */
2415 /* Note use of MYIMAGE_* since IMAGE_* are already defined in
2416 windows.h -- for the same purpose, but I want to know what I'm
2418 #define MYIMAGE_FILE_RELOCS_STRIPPED 0x0001
2419 #define MYIMAGE_FILE_EXECUTABLE_IMAGE 0x0002
2420 #define MYIMAGE_FILE_DLL 0x2000
2421 #define MYIMAGE_FILE_SYSTEM 0x1000
2422 #define MYIMAGE_FILE_BYTES_REVERSED_HI 0x8000
2423 #define MYIMAGE_FILE_BYTES_REVERSED_LO 0x0080
2424 #define MYIMAGE_FILE_32BIT_MACHINE 0x0100
2426 /* From PE spec doc, section 5.4.2 and 5.4.4 */
2427 #define MYIMAGE_SYM_CLASS_EXTERNAL 2
2428 #define MYIMAGE_SYM_CLASS_STATIC 3
2429 #define MYIMAGE_SYM_UNDEFINED 0
2431 /* From PE spec doc, section 4.1 */
2432 #define MYIMAGE_SCN_CNT_CODE 0x00000020
2433 #define MYIMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040
2434 #define MYIMAGE_SCN_LNK_NRELOC_OVFL 0x01000000
2436 /* From PE spec doc, section 5.2.1 */
2437 #define MYIMAGE_REL_I386_DIR32 0x0006
2438 #define MYIMAGE_REL_I386_REL32 0x0014
2441 /* We use myindex to calculate array addresses, rather than
2442 simply doing the normal subscript thing. That's because
2443 some of the above structs have sizes which are not
2444 a whole number of words. GCC rounds their sizes up to a
2445 whole number of words, which means that the address calcs
2446 arising from using normal C indexing or pointer arithmetic
2447 are just plain wrong. Sigh.
2450 myindex ( int scale, void* base, int index )
2453 ((UChar*)base) + scale * index;
2458 printName ( UChar* name, UChar* strtab )
2460 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
2461 UInt32 strtab_offset = * (UInt32*)(name+4);
2462 debugBelch("%s", strtab + strtab_offset );
2465 for (i = 0; i < 8; i++) {
2466 if (name[i] == 0) break;
2467 debugBelch("%c", name[i] );
2474 copyName ( UChar* name, UChar* strtab, UChar* dst, int dstSize )
2476 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
2477 UInt32 strtab_offset = * (UInt32*)(name+4);
2478 strncpy ( (char*)dst, (char*)strtab+strtab_offset, dstSize );
2484 if (name[i] == 0) break;
2494 cstring_from_COFF_symbol_name ( UChar* name, UChar* strtab )
2497 /* If the string is longer than 8 bytes, look in the
2498 string table for it -- this will be correctly zero terminated.
2500 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
2501 UInt32 strtab_offset = * (UInt32*)(name+4);
2502 return ((UChar*)strtab) + strtab_offset;
2504 /* Otherwise, if shorter than 8 bytes, return the original,
2505 which by defn is correctly terminated.
2507 if (name[7]==0) return name;
2508 /* The annoying case: 8 bytes. Copy into a temporary
2509 (XXX which is never freed ...)
2511 newstr = stgMallocBytes(9, "cstring_from_COFF_symbol_name");
2513 strncpy((char*)newstr,(char*)name,8);
2518 /* Getting the name of a section is mildly tricky, so we make a
2519 function for it. Sadly, in one case we have to copy the string
2520 (when it is exactly 8 bytes long there's no trailing '\0'), so for
2521 consistency we *always* copy the string; the caller must free it
2524 cstring_from_section_name (UChar* name, UChar* strtab)
2529 int strtab_offset = strtol((char*)name+1,NULL,10);
2530 int len = strlen(((char*)strtab) + strtab_offset);
2532 newstr = stgMallocBytes(len, "cstring_from_section_symbol_name");
2533 strcpy((char*)newstr, (char*)((UChar*)strtab) + strtab_offset);
2538 newstr = stgMallocBytes(9, "cstring_from_section_symbol_name");
2540 strncpy((char*)newstr,(char*)name,8);
2546 /* Just compares the short names (first 8 chars) */
2547 static COFF_section *
2548 findPEi386SectionCalled ( ObjectCode* oc, UChar* name )
2552 = (COFF_header*)(oc->image);
2553 COFF_section* sectab
2555 ((UChar*)(oc->image))
2556 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2558 for (i = 0; i < hdr->NumberOfSections; i++) {
2561 COFF_section* section_i
2563 myindex ( sizeof_COFF_section, sectab, i );
2564 n1 = (UChar*) &(section_i->Name);
2566 if (n1[0]==n2[0] && n1[1]==n2[1] && n1[2]==n2[2] &&
2567 n1[3]==n2[3] && n1[4]==n2[4] && n1[5]==n2[5] &&
2568 n1[6]==n2[6] && n1[7]==n2[7])
2577 zapTrailingAtSign ( UChar* sym )
2579 # define my_isdigit(c) ((c) >= '0' && (c) <= '9')
2581 if (sym[0] == 0) return;
2583 while (sym[i] != 0) i++;
2586 while (j > 0 && my_isdigit(sym[j])) j--;
2587 if (j > 0 && sym[j] == '@' && j != i) sym[j] = 0;
2592 lookupSymbolInDLLs ( UChar *lbl )
2597 for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next) {
2598 /* debugBelch("look in %s for %s\n", o_dll->name, lbl); */
2600 if (lbl[0] == '_') {
2601 /* HACK: if the name has an initial underscore, try stripping
2602 it off & look that up first. I've yet to verify whether there's
2603 a Rule that governs whether an initial '_' *should always* be
2604 stripped off when mapping from import lib name to the DLL name.
2606 sym = GetProcAddress(o_dll->instance, (char*)(lbl+1));
2608 /*debugBelch("found %s in %s\n", lbl+1,o_dll->name);*/
2612 sym = GetProcAddress(o_dll->instance, (char*)lbl);
2614 /*debugBelch("found %s in %s\n", lbl,o_dll->name);*/
2623 ocVerifyImage_PEi386 ( ObjectCode* oc )
2628 COFF_section* sectab;
2629 COFF_symbol* symtab;
2631 /* debugBelch("\nLOADING %s\n", oc->fileName); */
2632 hdr = (COFF_header*)(oc->image);
2633 sectab = (COFF_section*) (
2634 ((UChar*)(oc->image))
2635 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2637 symtab = (COFF_symbol*) (
2638 ((UChar*)(oc->image))
2639 + hdr->PointerToSymbolTable
2641 strtab = ((UChar*)symtab)
2642 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2644 if (hdr->Machine != 0x14c) {
2645 errorBelch("%s: Not x86 PEi386", oc->fileName);
2648 if (hdr->SizeOfOptionalHeader != 0) {
2649 errorBelch("%s: PEi386 with nonempty optional header", oc->fileName);
2652 if ( /* (hdr->Characteristics & MYIMAGE_FILE_RELOCS_STRIPPED) || */
2653 (hdr->Characteristics & MYIMAGE_FILE_EXECUTABLE_IMAGE) ||
2654 (hdr->Characteristics & MYIMAGE_FILE_DLL) ||
2655 (hdr->Characteristics & MYIMAGE_FILE_SYSTEM) ) {
2656 errorBelch("%s: Not a PEi386 object file", oc->fileName);
2659 if ( (hdr->Characteristics & MYIMAGE_FILE_BYTES_REVERSED_HI)
2660 /* || !(hdr->Characteristics & MYIMAGE_FILE_32BIT_MACHINE) */ ) {
2661 errorBelch("%s: Invalid PEi386 word size or endiannness: %d",
2663 (int)(hdr->Characteristics));
2666 /* If the string table size is way crazy, this might indicate that
2667 there are more than 64k relocations, despite claims to the
2668 contrary. Hence this test. */
2669 /* debugBelch("strtab size %d\n", * (UInt32*)strtab); */
2671 if ( (*(UInt32*)strtab) > 600000 ) {
2672 /* Note that 600k has no special significance other than being
2673 big enough to handle the almost-2MB-sized lumps that
2674 constitute HSwin32*.o. */
2675 debugBelch("PEi386 object has suspiciously large string table; > 64k relocs?");
2680 /* No further verification after this point; only debug printing. */
2682 IF_DEBUG(linker, i=1);
2683 if (i == 0) return 1;
2685 debugBelch( "sectab offset = %d\n", ((UChar*)sectab) - ((UChar*)hdr) );
2686 debugBelch( "symtab offset = %d\n", ((UChar*)symtab) - ((UChar*)hdr) );
2687 debugBelch( "strtab offset = %d\n", ((UChar*)strtab) - ((UChar*)hdr) );
2690 debugBelch( "Machine: 0x%x\n", (UInt32)(hdr->Machine) );
2691 debugBelch( "# sections: %d\n", (UInt32)(hdr->NumberOfSections) );
2692 debugBelch( "time/date: 0x%x\n", (UInt32)(hdr->TimeDateStamp) );
2693 debugBelch( "symtab offset: %d\n", (UInt32)(hdr->PointerToSymbolTable) );
2694 debugBelch( "# symbols: %d\n", (UInt32)(hdr->NumberOfSymbols) );
2695 debugBelch( "sz of opt hdr: %d\n", (UInt32)(hdr->SizeOfOptionalHeader) );
2696 debugBelch( "characteristics: 0x%x\n", (UInt32)(hdr->Characteristics) );
2698 /* Print the section table. */
2700 for (i = 0; i < hdr->NumberOfSections; i++) {
2702 COFF_section* sectab_i
2704 myindex ( sizeof_COFF_section, sectab, i );
2711 printName ( sectab_i->Name, strtab );
2721 sectab_i->VirtualSize,
2722 sectab_i->VirtualAddress,
2723 sectab_i->SizeOfRawData,
2724 sectab_i->PointerToRawData,
2725 sectab_i->NumberOfRelocations,
2726 sectab_i->PointerToRelocations,
2727 sectab_i->PointerToRawData
2729 reltab = (COFF_reloc*) (
2730 ((UChar*)(oc->image)) + sectab_i->PointerToRelocations
2733 if ( sectab_i->Characteristics & MYIMAGE_SCN_LNK_NRELOC_OVFL ) {
2734 /* If the relocation field (a short) has overflowed, the
2735 * real count can be found in the first reloc entry.
2737 * See Section 4.1 (last para) of the PE spec (rev6.0).
2739 COFF_reloc* rel = (COFF_reloc*)
2740 myindex ( sizeof_COFF_reloc, reltab, 0 );
2741 noRelocs = rel->VirtualAddress;
2744 noRelocs = sectab_i->NumberOfRelocations;
2748 for (; j < noRelocs; j++) {
2750 COFF_reloc* rel = (COFF_reloc*)
2751 myindex ( sizeof_COFF_reloc, reltab, j );
2753 " type 0x%-4x vaddr 0x%-8x name `",
2755 rel->VirtualAddress );
2756 sym = (COFF_symbol*)
2757 myindex ( sizeof_COFF_symbol, symtab, rel->SymbolTableIndex );
2758 /* Hmm..mysterious looking offset - what's it for? SOF */
2759 printName ( sym->Name, strtab -10 );
2766 debugBelch("string table has size 0x%x\n", * (UInt32*)strtab );
2767 debugBelch("---START of string table---\n");
2768 for (i = 4; i < *(Int32*)strtab; i++) {
2770 debugBelch("\n"); else
2771 debugBelch("%c", strtab[i] );
2773 debugBelch("--- END of string table---\n");
2778 COFF_symbol* symtab_i;
2779 if (i >= (Int32)(hdr->NumberOfSymbols)) break;
2780 symtab_i = (COFF_symbol*)
2781 myindex ( sizeof_COFF_symbol, symtab, i );
2787 printName ( symtab_i->Name, strtab );
2796 (Int32)(symtab_i->SectionNumber),
2797 (UInt32)symtab_i->Type,
2798 (UInt32)symtab_i->StorageClass,
2799 (UInt32)symtab_i->NumberOfAuxSymbols
2801 i += symtab_i->NumberOfAuxSymbols;
2811 ocGetNames_PEi386 ( ObjectCode* oc )
2814 COFF_section* sectab;
2815 COFF_symbol* symtab;
2822 hdr = (COFF_header*)(oc->image);
2823 sectab = (COFF_section*) (
2824 ((UChar*)(oc->image))
2825 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2827 symtab = (COFF_symbol*) (
2828 ((UChar*)(oc->image))
2829 + hdr->PointerToSymbolTable
2831 strtab = ((UChar*)(oc->image))
2832 + hdr->PointerToSymbolTable
2833 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2835 /* Allocate space for any (local, anonymous) .bss sections. */
2837 for (i = 0; i < hdr->NumberOfSections; i++) {
2840 COFF_section* sectab_i
2842 myindex ( sizeof_COFF_section, sectab, i );
2844 char *secname = cstring_from_section_name(sectab_i->Name, strtab);
2846 if (0 != strcmp(secname, ".bss")) {
2853 /* sof 10/05: the PE spec text isn't too clear regarding what
2854 * the SizeOfRawData field is supposed to hold for object
2855 * file sections containing just uninitialized data -- for executables,
2856 * it is supposed to be zero; unclear what it's supposed to be
2857 * for object files. However, VirtualSize is guaranteed to be
2858 * zero for object files, which definitely suggests that SizeOfRawData
2859 * will be non-zero (where else would the size of this .bss section be
2860 * stored?) Looking at the COFF_section info for incoming object files,
2861 * this certainly appears to be the case.
2863 * => I suspect we've been incorrectly handling .bss sections in (relocatable)
2864 * object files up until now. This turned out to bite us with ghc-6.4.1's use
2865 * of gcc-3.4.x, which has started to emit initially-zeroed-out local 'static'
2866 * variable decls into to the .bss section. (The specific function in Q which
2867 * triggered this is libraries/base/cbits/dirUtils.c:__hscore_getFolderPath())
2869 if (sectab_i->VirtualSize == 0 && sectab_i->SizeOfRawData == 0) continue;
2870 /* This is a non-empty .bss section. Allocate zeroed space for
2871 it, and set its PointerToRawData field such that oc->image +
2872 PointerToRawData == addr_of_zeroed_space. */
2873 bss_sz = sectab_i->VirtualSize;
2874 if ( bss_sz < sectab_i->SizeOfRawData) { bss_sz = sectab_i->SizeOfRawData; }
2875 zspace = stgCallocBytes(1, bss_sz, "ocGetNames_PEi386(anonymous bss)");
2876 sectab_i->PointerToRawData = ((UChar*)zspace) - ((UChar*)(oc->image));
2877 addProddableBlock(oc, zspace, bss_sz);
2878 /* debugBelch("BSS anon section at 0x%x\n", zspace); */
2881 /* Copy section information into the ObjectCode. */
2883 for (i = 0; i < hdr->NumberOfSections; i++) {
2889 = SECTIONKIND_OTHER;
2890 COFF_section* sectab_i
2892 myindex ( sizeof_COFF_section, sectab, i );
2894 char *secname = cstring_from_section_name(sectab_i->Name, strtab);
2896 IF_DEBUG(linker, debugBelch("section name = %s\n", secname ));
2899 /* I'm sure this is the Right Way to do it. However, the
2900 alternative of testing the sectab_i->Name field seems to
2901 work ok with Cygwin.
2903 if (sectab_i->Characteristics & MYIMAGE_SCN_CNT_CODE ||
2904 sectab_i->Characteristics & MYIMAGE_SCN_CNT_INITIALIZED_DATA)
2905 kind = SECTIONKIND_CODE_OR_RODATA;
2908 if (0==strcmp(".text",(char*)secname) ||
2909 0==strcmp(".rdata",(char*)secname)||
2910 0==strcmp(".rodata",(char*)secname))
2911 kind = SECTIONKIND_CODE_OR_RODATA;
2912 if (0==strcmp(".data",(char*)secname) ||
2913 0==strcmp(".bss",(char*)secname))
2914 kind = SECTIONKIND_RWDATA;
2916 ASSERT(sectab_i->SizeOfRawData == 0 || sectab_i->VirtualSize == 0);
2917 sz = sectab_i->SizeOfRawData;
2918 if (sz < sectab_i->VirtualSize) sz = sectab_i->VirtualSize;
2920 start = ((UChar*)(oc->image)) + sectab_i->PointerToRawData;
2921 end = start + sz - 1;
2923 if (kind == SECTIONKIND_OTHER
2924 /* Ignore sections called which contain stabs debugging
2926 && 0 != strcmp(".stab", (char*)secname)
2927 && 0 != strcmp(".stabstr", (char*)secname)
2928 /* ignore constructor section for now */
2929 && 0 != strcmp(".ctors", (char*)secname)
2930 /* ignore section generated from .ident */
2931 && 0!= strncmp(".debug", (char*)secname, 6)
2932 /* ignore unknown section that appeared in gcc 3.4.5(?) */
2933 && 0!= strcmp(".reloc", (char*)secname)
2934 && 0 != strcmp(".rdata$zzz", (char*)secname)
2936 errorBelch("Unknown PEi386 section name `%s' (while processing: %s)", secname, oc->fileName);
2941 if (kind != SECTIONKIND_OTHER && end >= start) {
2942 addSection(oc, kind, start, end);
2943 addProddableBlock(oc, start, end - start + 1);
2949 /* Copy exported symbols into the ObjectCode. */
2951 oc->n_symbols = hdr->NumberOfSymbols;
2952 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
2953 "ocGetNames_PEi386(oc->symbols)");
2954 /* Call me paranoid; I don't care. */
2955 for (i = 0; i < oc->n_symbols; i++)
2956 oc->symbols[i] = NULL;
2960 COFF_symbol* symtab_i;
2961 if (i >= (Int32)(hdr->NumberOfSymbols)) break;
2962 symtab_i = (COFF_symbol*)
2963 myindex ( sizeof_COFF_symbol, symtab, i );
2967 if (symtab_i->StorageClass == MYIMAGE_SYM_CLASS_EXTERNAL
2968 && symtab_i->SectionNumber != MYIMAGE_SYM_UNDEFINED) {
2969 /* This symbol is global and defined, viz, exported */
2970 /* for MYIMAGE_SYMCLASS_EXTERNAL
2971 && !MYIMAGE_SYM_UNDEFINED,
2972 the address of the symbol is:
2973 address of relevant section + offset in section
2975 COFF_section* sectabent
2976 = (COFF_section*) myindex ( sizeof_COFF_section,
2978 symtab_i->SectionNumber-1 );
2979 addr = ((UChar*)(oc->image))
2980 + (sectabent->PointerToRawData
2984 if (symtab_i->SectionNumber == MYIMAGE_SYM_UNDEFINED
2985 && symtab_i->Value > 0) {
2986 /* This symbol isn't in any section at all, ie, global bss.
2987 Allocate zeroed space for it. */
2988 addr = stgCallocBytes(1, symtab_i->Value,
2989 "ocGetNames_PEi386(non-anonymous bss)");
2990 addSection(oc, SECTIONKIND_RWDATA, addr,
2991 ((UChar*)addr) + symtab_i->Value - 1);
2992 addProddableBlock(oc, addr, symtab_i->Value);
2993 /* debugBelch("BSS section at 0x%x\n", addr); */
2996 if (addr != NULL ) {
2997 sname = cstring_from_COFF_symbol_name ( symtab_i->Name, strtab );
2998 /* debugBelch("addSymbol %p `%s \n", addr,sname); */
2999 IF_DEBUG(linker, debugBelch("addSymbol %p `%s'\n", addr,sname);)
3000 ASSERT(i >= 0 && i < oc->n_symbols);
3001 /* cstring_from_COFF_symbol_name always succeeds. */
3002 oc->symbols[i] = (char*)sname;
3003 ghciInsertStrHashTable(oc->fileName, symhash, (char*)sname, addr);
3007 "IGNORING symbol %d\n"
3011 printName ( symtab_i->Name, strtab );
3020 (Int32)(symtab_i->SectionNumber),
3021 (UInt32)symtab_i->Type,
3022 (UInt32)symtab_i->StorageClass,
3023 (UInt32)symtab_i->NumberOfAuxSymbols
3028 i += symtab_i->NumberOfAuxSymbols;
3037 ocResolve_PEi386 ( ObjectCode* oc )
3040 COFF_section* sectab;
3041 COFF_symbol* symtab;
3051 /* ToDo: should be variable-sized? But is at least safe in the
3052 sense of buffer-overrun-proof. */
3054 /* debugBelch("resolving for %s\n", oc->fileName); */
3056 hdr = (COFF_header*)(oc->image);
3057 sectab = (COFF_section*) (
3058 ((UChar*)(oc->image))
3059 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
3061 symtab = (COFF_symbol*) (
3062 ((UChar*)(oc->image))
3063 + hdr->PointerToSymbolTable
3065 strtab = ((UChar*)(oc->image))
3066 + hdr->PointerToSymbolTable
3067 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
3069 for (i = 0; i < hdr->NumberOfSections; i++) {
3070 COFF_section* sectab_i
3072 myindex ( sizeof_COFF_section, sectab, i );
3075 ((UChar*)(oc->image)) + sectab_i->PointerToRelocations
3078 char *secname = cstring_from_section_name(sectab_i->Name, strtab);
3080 /* Ignore sections called which contain stabs debugging
3082 if (0 == strcmp(".stab", (char*)secname)
3083 || 0 == strcmp(".stabstr", (char*)secname)
3084 || 0 == strcmp(".ctors", (char*)secname)
3085 || 0 == strncmp(".debug", (char*)secname, 6)
3086 || 0 == strcmp(".rdata$zzz", (char*)secname)) {
3093 if ( sectab_i->Characteristics & MYIMAGE_SCN_LNK_NRELOC_OVFL ) {
3094 /* If the relocation field (a short) has overflowed, the
3095 * real count can be found in the first reloc entry.
3097 * See Section 4.1 (last para) of the PE spec (rev6.0).
3099 * Nov2003 update: the GNU linker still doesn't correctly
3100 * handle the generation of relocatable object files with
3101 * overflown relocations. Hence the output to warn of potential
3104 COFF_reloc* rel = (COFF_reloc*)
3105 myindex ( sizeof_COFF_reloc, reltab, 0 );
3106 noRelocs = rel->VirtualAddress;
3108 /* 10/05: we now assume (and check for) a GNU ld that is capable
3109 * of handling object files with (>2^16) of relocs.
3112 debugBelch("WARNING: Overflown relocation field (# relocs found: %u)\n",
3117 noRelocs = sectab_i->NumberOfRelocations;
3122 for (; j < noRelocs; j++) {
3124 COFF_reloc* reltab_j
3126 myindex ( sizeof_COFF_reloc, reltab, j );
3128 /* the location to patch */
3130 ((UChar*)(oc->image))
3131 + (sectab_i->PointerToRawData
3132 + reltab_j->VirtualAddress
3133 - sectab_i->VirtualAddress )
3135 /* the existing contents of pP */
3137 /* the symbol to connect to */
3138 sym = (COFF_symbol*)
3139 myindex ( sizeof_COFF_symbol,
3140 symtab, reltab_j->SymbolTableIndex );
3143 "reloc sec %2d num %3d: type 0x%-4x "
3144 "vaddr 0x%-8x name `",
3146 (UInt32)reltab_j->Type,
3147 reltab_j->VirtualAddress );
3148 printName ( sym->Name, strtab );
3149 debugBelch("'\n" ));
3151 if (sym->StorageClass == MYIMAGE_SYM_CLASS_STATIC) {
3152 COFF_section* section_sym
3153 = findPEi386SectionCalled ( oc, sym->Name );
3155 errorBelch("%s: can't find section `%s'", oc->fileName, sym->Name);
3158 S = ((UInt32)(oc->image))
3159 + (section_sym->PointerToRawData
3162 copyName ( sym->Name, strtab, symbol, 1000-1 );
3163 S = (UInt32) lookupSymbol( (char*)symbol );
3164 if ((void*)S != NULL) goto foundit;
3165 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3169 checkProddableBlock(oc, pP);
3170 switch (reltab_j->Type) {
3171 case MYIMAGE_REL_I386_DIR32:
3174 case MYIMAGE_REL_I386_REL32:
3175 /* Tricky. We have to insert a displacement at
3176 pP which, when added to the PC for the _next_
3177 insn, gives the address of the target (S).
3178 Problem is to know the address of the next insn
3179 when we only know pP. We assume that this
3180 literal field is always the last in the insn,
3181 so that the address of the next insn is pP+4
3182 -- hence the constant 4.
3183 Also I don't know if A should be added, but so
3184 far it has always been zero.
3186 SOF 05/2005: 'A' (old contents of *pP) have been observed
3187 to contain values other than zero (the 'wx' object file
3188 that came with wxhaskell-0.9.4; dunno how it was compiled..).
3189 So, add displacement to old value instead of asserting
3190 A to be zero. Fixes wxhaskell-related crashes, and no other
3191 ill effects have been observed.
3193 Update: the reason why we're seeing these more elaborate
3194 relocations is due to a switch in how the NCG compiles SRTs
3195 and offsets to them from info tables. SRTs live in .(ro)data,
3196 while info tables live in .text, causing GAS to emit REL32/DISP32
3197 relocations with non-zero values. Adding the displacement is
3198 the right thing to do.
3200 *pP = S - ((UInt32)pP) - 4 + A;
3203 debugBelch("%s: unhandled PEi386 relocation type %d",
3204 oc->fileName, reltab_j->Type);
3211 IF_DEBUG(linker, debugBelch("completed %s", oc->fileName));
3215 #endif /* defined(OBJFORMAT_PEi386) */
3218 /* --------------------------------------------------------------------------
3220 * ------------------------------------------------------------------------*/
3222 #if defined(OBJFORMAT_ELF)
3227 #if defined(sparc_HOST_ARCH)
3228 # define ELF_TARGET_SPARC /* Used inside <elf.h> */
3229 #elif defined(i386_HOST_ARCH)
3230 # define ELF_TARGET_386 /* Used inside <elf.h> */
3231 #elif defined(x86_64_HOST_ARCH)
3232 # define ELF_TARGET_X64_64
3236 #if !defined(openbsd_HOST_OS)
3239 /* openbsd elf has things in different places, with diff names */
3240 # include <elf_abi.h>
3241 # include <machine/reloc.h>
3242 # define R_386_32 RELOC_32
3243 # define R_386_PC32 RELOC_PC32
3246 /* If elf.h doesn't define it */
3247 # ifndef R_X86_64_PC64
3248 # define R_X86_64_PC64 24
3252 * Define a set of types which can be used for both ELF32 and ELF64
3256 #define ELFCLASS ELFCLASS64
3257 #define Elf_Addr Elf64_Addr
3258 #define Elf_Word Elf64_Word
3259 #define Elf_Sword Elf64_Sword
3260 #define Elf_Ehdr Elf64_Ehdr
3261 #define Elf_Phdr Elf64_Phdr
3262 #define Elf_Shdr Elf64_Shdr
3263 #define Elf_Sym Elf64_Sym
3264 #define Elf_Rel Elf64_Rel
3265 #define Elf_Rela Elf64_Rela
3267 #define ELF_ST_TYPE ELF64_ST_TYPE
3270 #define ELF_ST_BIND ELF64_ST_BIND
3273 #define ELF_R_TYPE ELF64_R_TYPE
3276 #define ELF_R_SYM ELF64_R_SYM
3279 #define ELFCLASS ELFCLASS32
3280 #define Elf_Addr Elf32_Addr
3281 #define Elf_Word Elf32_Word
3282 #define Elf_Sword Elf32_Sword
3283 #define Elf_Ehdr Elf32_Ehdr
3284 #define Elf_Phdr Elf32_Phdr
3285 #define Elf_Shdr Elf32_Shdr
3286 #define Elf_Sym Elf32_Sym
3287 #define Elf_Rel Elf32_Rel
3288 #define Elf_Rela Elf32_Rela
3290 #define ELF_ST_TYPE ELF32_ST_TYPE
3293 #define ELF_ST_BIND ELF32_ST_BIND
3296 #define ELF_R_TYPE ELF32_R_TYPE
3299 #define ELF_R_SYM ELF32_R_SYM
3305 * Functions to allocate entries in dynamic sections. Currently we simply
3306 * preallocate a large number, and we don't check if a entry for the given
3307 * target already exists (a linear search is too slow). Ideally these
3308 * entries would be associated with symbols.
3311 /* These sizes sufficient to load HSbase + HShaskell98 + a few modules */
3312 #define GOT_SIZE 0x20000
3313 #define FUNCTION_TABLE_SIZE 0x10000
3314 #define PLT_SIZE 0x08000
3317 static Elf_Addr got[GOT_SIZE];
3318 static unsigned int gotIndex;
3319 static Elf_Addr gp_val = (Elf_Addr)got;
3322 allocateGOTEntry(Elf_Addr target)
3326 if (gotIndex >= GOT_SIZE)
3327 barf("Global offset table overflow");
3329 entry = &got[gotIndex++];
3331 return (Elf_Addr)entry;
3335 #ifdef ELF_FUNCTION_DESC
3341 static FunctionDesc functionTable[FUNCTION_TABLE_SIZE];
3342 static unsigned int functionTableIndex;
3345 allocateFunctionDesc(Elf_Addr target)
3347 FunctionDesc *entry;
3349 if (functionTableIndex >= FUNCTION_TABLE_SIZE)
3350 barf("Function table overflow");
3352 entry = &functionTable[functionTableIndex++];
3354 entry->gp = (Elf_Addr)gp_val;
3355 return (Elf_Addr)entry;
3359 copyFunctionDesc(Elf_Addr target)
3361 FunctionDesc *olddesc = (FunctionDesc *)target;
3362 FunctionDesc *newdesc;
3364 newdesc = (FunctionDesc *)allocateFunctionDesc(olddesc->ip);
3365 newdesc->gp = olddesc->gp;
3366 return (Elf_Addr)newdesc;
3373 unsigned char code[sizeof(plt_code)];
3377 allocatePLTEntry(Elf_Addr target, ObjectCode *oc)
3379 PLTEntry *plt = (PLTEntry *)oc->plt;
3382 if (oc->pltIndex >= PLT_SIZE)
3383 barf("Procedure table overflow");
3385 entry = &plt[oc->pltIndex++];
3386 memcpy(entry->code, plt_code, sizeof(entry->code));
3387 PLT_RELOC(entry->code, target);
3388 return (Elf_Addr)entry;
3394 return (PLT_SIZE * sizeof(PLTEntry));
3400 * Generic ELF functions
3404 findElfSection ( void* objImage, Elf_Word sh_type )
3406 char* ehdrC = (char*)objImage;
3407 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3408 Elf_Shdr* shdr = (Elf_Shdr*)(ehdrC + ehdr->e_shoff);
3409 char* sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
3413 for (i = 0; i < ehdr->e_shnum; i++) {
3414 if (shdr[i].sh_type == sh_type
3415 /* Ignore the section header's string table. */
3416 && i != ehdr->e_shstrndx
3417 /* Ignore string tables named .stabstr, as they contain
3419 && 0 != memcmp(".stabstr", sh_strtab + shdr[i].sh_name, 8)
3421 ptr = ehdrC + shdr[i].sh_offset;
3429 ocVerifyImage_ELF ( ObjectCode* oc )
3433 int i, j, nent, nstrtab, nsymtabs;
3437 char* ehdrC = (char*)(oc->image);
3438 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3440 if (ehdr->e_ident[EI_MAG0] != ELFMAG0 ||
3441 ehdr->e_ident[EI_MAG1] != ELFMAG1 ||
3442 ehdr->e_ident[EI_MAG2] != ELFMAG2 ||
3443 ehdr->e_ident[EI_MAG3] != ELFMAG3) {
3444 errorBelch("%s: not an ELF object", oc->fileName);
3448 if (ehdr->e_ident[EI_CLASS] != ELFCLASS) {
3449 errorBelch("%s: unsupported ELF format", oc->fileName);
3453 if (ehdr->e_ident[EI_DATA] == ELFDATA2LSB) {
3454 IF_DEBUG(linker,debugBelch( "Is little-endian\n" ));
3456 if (ehdr->e_ident[EI_DATA] == ELFDATA2MSB) {
3457 IF_DEBUG(linker,debugBelch( "Is big-endian\n" ));
3459 errorBelch("%s: unknown endiannness", oc->fileName);
3463 if (ehdr->e_type != ET_REL) {
3464 errorBelch("%s: not a relocatable object (.o) file", oc->fileName);
3467 IF_DEBUG(linker, debugBelch( "Is a relocatable object (.o) file\n" ));
3469 IF_DEBUG(linker,debugBelch( "Architecture is " ));
3470 switch (ehdr->e_machine) {
3471 case EM_386: IF_DEBUG(linker,debugBelch( "x86" )); break;
3472 #ifdef EM_SPARC32PLUS
3473 case EM_SPARC32PLUS:
3475 case EM_SPARC: IF_DEBUG(linker,debugBelch( "sparc" )); break;
3477 case EM_IA_64: IF_DEBUG(linker,debugBelch( "ia64" )); break;
3479 case EM_PPC: IF_DEBUG(linker,debugBelch( "powerpc32" )); break;
3481 case EM_X86_64: IF_DEBUG(linker,debugBelch( "x86_64" )); break;
3482 #elif defined(EM_AMD64)
3483 case EM_AMD64: IF_DEBUG(linker,debugBelch( "amd64" )); break;
3485 default: IF_DEBUG(linker,debugBelch( "unknown" ));
3486 errorBelch("%s: unknown architecture (e_machine == %d)"
3487 , oc->fileName, ehdr->e_machine);
3491 IF_DEBUG(linker,debugBelch(
3492 "\nSection header table: start %ld, n_entries %d, ent_size %d\n",
3493 (long)ehdr->e_shoff, ehdr->e_shnum, ehdr->e_shentsize ));
3495 ASSERT (ehdr->e_shentsize == sizeof(Elf_Shdr));
3497 shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
3499 if (ehdr->e_shstrndx == SHN_UNDEF) {
3500 errorBelch("%s: no section header string table", oc->fileName);
3503 IF_DEBUG(linker,debugBelch( "Section header string table is section %d\n",
3505 sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
3508 for (i = 0; i < ehdr->e_shnum; i++) {
3509 IF_DEBUG(linker,debugBelch("%2d: ", i ));
3510 IF_DEBUG(linker,debugBelch("type=%2d ", (int)shdr[i].sh_type ));
3511 IF_DEBUG(linker,debugBelch("size=%4d ", (int)shdr[i].sh_size ));
3512 IF_DEBUG(linker,debugBelch("offs=%4d ", (int)shdr[i].sh_offset ));
3513 IF_DEBUG(linker,debugBelch(" (%p .. %p) ",
3514 ehdrC + shdr[i].sh_offset,
3515 ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1));
3517 if (shdr[i].sh_type == SHT_REL) {
3518 IF_DEBUG(linker,debugBelch("Rel " ));
3519 } else if (shdr[i].sh_type == SHT_RELA) {
3520 IF_DEBUG(linker,debugBelch("RelA " ));
3522 IF_DEBUG(linker,debugBelch(" "));
3525 IF_DEBUG(linker,debugBelch("sname=%s\n", sh_strtab + shdr[i].sh_name ));
3529 IF_DEBUG(linker,debugBelch( "\nString tables" ));
3532 for (i = 0; i < ehdr->e_shnum; i++) {
3533 if (shdr[i].sh_type == SHT_STRTAB
3534 /* Ignore the section header's string table. */
3535 && i != ehdr->e_shstrndx
3536 /* Ignore string tables named .stabstr, as they contain
3538 && 0 != memcmp(".stabstr", sh_strtab + shdr[i].sh_name, 8)
3540 IF_DEBUG(linker,debugBelch(" section %d is a normal string table", i ));
3541 strtab = ehdrC + shdr[i].sh_offset;
3546 errorBelch("%s: no string tables, or too many", oc->fileName);
3551 IF_DEBUG(linker,debugBelch( "\nSymbol tables" ));
3552 for (i = 0; i < ehdr->e_shnum; i++) {
3553 if (shdr[i].sh_type != SHT_SYMTAB) continue;
3554 IF_DEBUG(linker,debugBelch( "section %d is a symbol table\n", i ));
3556 stab = (Elf_Sym*) (ehdrC + shdr[i].sh_offset);
3557 nent = shdr[i].sh_size / sizeof(Elf_Sym);
3558 IF_DEBUG(linker,debugBelch( " number of entries is apparently %d (%ld rem)\n",
3560 (long)shdr[i].sh_size % sizeof(Elf_Sym)
3562 if (0 != shdr[i].sh_size % sizeof(Elf_Sym)) {
3563 errorBelch("%s: non-integral number of symbol table entries", oc->fileName);
3566 for (j = 0; j < nent; j++) {
3567 IF_DEBUG(linker,debugBelch(" %2d ", j ));
3568 IF_DEBUG(linker,debugBelch(" sec=%-5d size=%-3d val=%5p ",
3569 (int)stab[j].st_shndx,
3570 (int)stab[j].st_size,
3571 (char*)stab[j].st_value ));
3573 IF_DEBUG(linker,debugBelch("type=" ));
3574 switch (ELF_ST_TYPE(stab[j].st_info)) {
3575 case STT_NOTYPE: IF_DEBUG(linker,debugBelch("notype " )); break;
3576 case STT_OBJECT: IF_DEBUG(linker,debugBelch("object " )); break;
3577 case STT_FUNC : IF_DEBUG(linker,debugBelch("func " )); break;
3578 case STT_SECTION: IF_DEBUG(linker,debugBelch("section" )); break;
3579 case STT_FILE: IF_DEBUG(linker,debugBelch("file " )); break;
3580 default: IF_DEBUG(linker,debugBelch("? " )); break;
3582 IF_DEBUG(linker,debugBelch(" " ));
3584 IF_DEBUG(linker,debugBelch("bind=" ));
3585 switch (ELF_ST_BIND(stab[j].st_info)) {
3586 case STB_LOCAL : IF_DEBUG(linker,debugBelch("local " )); break;
3587 case STB_GLOBAL: IF_DEBUG(linker,debugBelch("global" )); break;
3588 case STB_WEAK : IF_DEBUG(linker,debugBelch("weak " )); break;
3589 default: IF_DEBUG(linker,debugBelch("? " )); break;
3591 IF_DEBUG(linker,debugBelch(" " ));
3593 IF_DEBUG(linker,debugBelch("name=%s\n", strtab + stab[j].st_name ));
3597 if (nsymtabs == 0) {
3598 errorBelch("%s: didn't find any symbol tables", oc->fileName);
3605 static int getSectionKind_ELF( Elf_Shdr *hdr, int *is_bss )
3609 if (hdr->sh_type == SHT_PROGBITS
3610 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_EXECINSTR)) {
3611 /* .text-style section */
3612 return SECTIONKIND_CODE_OR_RODATA;
3615 if (hdr->sh_type == SHT_PROGBITS
3616 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_WRITE)) {
3617 /* .data-style section */
3618 return SECTIONKIND_RWDATA;
3621 if (hdr->sh_type == SHT_PROGBITS
3622 && (hdr->sh_flags & SHF_ALLOC) && !(hdr->sh_flags & SHF_WRITE)) {
3623 /* .rodata-style section */
3624 return SECTIONKIND_CODE_OR_RODATA;
3627 if (hdr->sh_type == SHT_NOBITS
3628 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_WRITE)) {
3629 /* .bss-style section */
3631 return SECTIONKIND_RWDATA;
3634 return SECTIONKIND_OTHER;
3639 ocGetNames_ELF ( ObjectCode* oc )
3644 char* ehdrC = (char*)(oc->image);
3645 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3646 char* strtab = findElfSection ( ehdrC, SHT_STRTAB );
3647 Elf_Shdr* shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
3649 ASSERT(symhash != NULL);
3652 errorBelch("%s: no strtab", oc->fileName);
3657 for (i = 0; i < ehdr->e_shnum; i++) {
3658 /* Figure out what kind of section it is. Logic derived from
3659 Figure 1.14 ("Special Sections") of the ELF document
3660 ("Portable Formats Specification, Version 1.1"). */
3662 SectionKind kind = getSectionKind_ELF(&shdr[i], &is_bss);
3664 if (is_bss && shdr[i].sh_size > 0) {
3665 /* This is a non-empty .bss section. Allocate zeroed space for
3666 it, and set its .sh_offset field such that
3667 ehdrC + .sh_offset == addr_of_zeroed_space. */
3668 char* zspace = stgCallocBytes(1, shdr[i].sh_size,
3669 "ocGetNames_ELF(BSS)");
3670 shdr[i].sh_offset = ((char*)zspace) - ((char*)ehdrC);
3672 debugBelch("BSS section at 0x%x, size %d\n",
3673 zspace, shdr[i].sh_size);
3677 /* fill in the section info */
3678 if (kind != SECTIONKIND_OTHER && shdr[i].sh_size > 0) {
3679 addProddableBlock(oc, ehdrC + shdr[i].sh_offset, shdr[i].sh_size);
3680 addSection(oc, kind, ehdrC + shdr[i].sh_offset,
3681 ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1);
3684 if (shdr[i].sh_type != SHT_SYMTAB) continue;
3686 /* copy stuff into this module's object symbol table */
3687 stab = (Elf_Sym*) (ehdrC + shdr[i].sh_offset);
3688 nent = shdr[i].sh_size / sizeof(Elf_Sym);
3690 oc->n_symbols = nent;
3691 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
3692 "ocGetNames_ELF(oc->symbols)");
3694 for (j = 0; j < nent; j++) {
3696 char isLocal = FALSE; /* avoids uninit-var warning */
3698 char* nm = strtab + stab[j].st_name;
3699 int secno = stab[j].st_shndx;
3701 /* Figure out if we want to add it; if so, set ad to its
3702 address. Otherwise leave ad == NULL. */
3704 if (secno == SHN_COMMON) {
3706 ad = stgCallocBytes(1, stab[j].st_size, "ocGetNames_ELF(COMMON)");
3708 debugBelch("COMMON symbol, size %d name %s\n",
3709 stab[j].st_size, nm);
3711 /* Pointless to do addProddableBlock() for this area,
3712 since the linker should never poke around in it. */
3715 if ( ( ELF_ST_BIND(stab[j].st_info)==STB_GLOBAL
3716 || ELF_ST_BIND(stab[j].st_info)==STB_LOCAL
3718 /* and not an undefined symbol */
3719 && stab[j].st_shndx != SHN_UNDEF
3720 /* and not in a "special section" */
3721 && stab[j].st_shndx < SHN_LORESERVE
3723 /* and it's a not a section or string table or anything silly */
3724 ( ELF_ST_TYPE(stab[j].st_info)==STT_FUNC ||
3725 ELF_ST_TYPE(stab[j].st_info)==STT_OBJECT ||
3726 ELF_ST_TYPE(stab[j].st_info)==STT_NOTYPE
3729 /* Section 0 is the undefined section, hence > and not >=. */
3730 ASSERT(secno > 0 && secno < ehdr->e_shnum);
3732 if (shdr[secno].sh_type == SHT_NOBITS) {
3733 debugBelch(" BSS symbol, size %d off %d name %s\n",
3734 stab[j].st_size, stab[j].st_value, nm);
3737 ad = ehdrC + shdr[ secno ].sh_offset + stab[j].st_value;
3738 if (ELF_ST_BIND(stab[j].st_info)==STB_LOCAL) {
3741 #ifdef ELF_FUNCTION_DESC
3742 /* dlsym() and the initialisation table both give us function
3743 * descriptors, so to be consistent we store function descriptors
3744 * in the symbol table */
3745 if (ELF_ST_TYPE(stab[j].st_info) == STT_FUNC)
3746 ad = (char *)allocateFunctionDesc((Elf_Addr)ad);
3748 IF_DEBUG(linker,debugBelch( "addOTabName(GLOB): %10p %s %s\n",
3749 ad, oc->fileName, nm ));
3754 /* And the decision is ... */
3758 oc->symbols[j] = nm;
3761 /* Ignore entirely. */
3763 ghciInsertStrHashTable(oc->fileName, symhash, nm, ad);
3767 IF_DEBUG(linker,debugBelch( "skipping `%s'\n",
3768 strtab + stab[j].st_name ));
3771 "skipping bind = %d, type = %d, shndx = %d `%s'\n",
3772 (int)ELF_ST_BIND(stab[j].st_info),
3773 (int)ELF_ST_TYPE(stab[j].st_info),
3774 (int)stab[j].st_shndx,
3775 strtab + stab[j].st_name
3778 oc->symbols[j] = NULL;
3787 /* Do ELF relocations which lack an explicit addend. All x86-linux
3788 relocations appear to be of this form. */
3790 do_Elf_Rel_relocations ( ObjectCode* oc, char* ehdrC,
3791 Elf_Shdr* shdr, int shnum,
3792 Elf_Sym* stab, char* strtab )
3797 Elf_Rel* rtab = (Elf_Rel*) (ehdrC + shdr[shnum].sh_offset);
3798 int nent = shdr[shnum].sh_size / sizeof(Elf_Rel);
3799 int target_shndx = shdr[shnum].sh_info;
3800 int symtab_shndx = shdr[shnum].sh_link;
3802 stab = (Elf_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
3803 targ = (Elf_Word*)(ehdrC + shdr[ target_shndx ].sh_offset);
3804 IF_DEBUG(linker,debugBelch( "relocations for section %d using symtab %d\n",
3805 target_shndx, symtab_shndx ));
3807 /* Skip sections that we're not interested in. */
3810 SectionKind kind = getSectionKind_ELF(&shdr[target_shndx], &is_bss);
3811 if (kind == SECTIONKIND_OTHER) {
3812 IF_DEBUG(linker,debugBelch( "skipping (target section not loaded)"));
3817 for (j = 0; j < nent; j++) {
3818 Elf_Addr offset = rtab[j].r_offset;
3819 Elf_Addr info = rtab[j].r_info;
3821 Elf_Addr P = ((Elf_Addr)targ) + offset;
3822 Elf_Word* pP = (Elf_Word*)P;
3827 StgStablePtr stablePtr;
3830 IF_DEBUG(linker,debugBelch( "Rel entry %3d is raw(%6p %6p)",
3831 j, (void*)offset, (void*)info ));
3833 IF_DEBUG(linker,debugBelch( " ZERO" ));
3836 Elf_Sym sym = stab[ELF_R_SYM(info)];
3837 /* First see if it is a local symbol. */
3838 if (ELF_ST_BIND(sym.st_info) == STB_LOCAL) {
3839 /* Yes, so we can get the address directly from the ELF symbol
3841 symbol = sym.st_name==0 ? "(noname)" : strtab+sym.st_name;
3843 (ehdrC + shdr[ sym.st_shndx ].sh_offset
3844 + stab[ELF_R_SYM(info)].st_value);
3847 symbol = strtab + sym.st_name;
3848 stablePtr = (StgStablePtr)lookupHashTable(stablehash, (StgWord)symbol);
3849 if (NULL == stablePtr) {
3850 /* No, so look up the name in our global table. */
3851 S_tmp = lookupSymbol( symbol );
3852 S = (Elf_Addr)S_tmp;
3854 stableVal = deRefStablePtr( stablePtr );
3856 S = (Elf_Addr)S_tmp;
3860 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3863 IF_DEBUG(linker,debugBelch( "`%s' resolves to %p\n", symbol, (void*)S ));
3866 IF_DEBUG(linker,debugBelch( "Reloc: P = %p S = %p A = %p\n",
3867 (void*)P, (void*)S, (void*)A ));
3868 checkProddableBlock ( oc, pP );
3872 switch (ELF_R_TYPE(info)) {
3873 # ifdef i386_HOST_ARCH
3874 case R_386_32: *pP = value; break;
3875 case R_386_PC32: *pP = value - P; break;
3878 errorBelch("%s: unhandled ELF relocation(Rel) type %lu\n",
3879 oc->fileName, (lnat)ELF_R_TYPE(info));
3887 /* Do ELF relocations for which explicit addends are supplied.
3888 sparc-solaris relocations appear to be of this form. */
3890 do_Elf_Rela_relocations ( ObjectCode* oc, char* ehdrC,
3891 Elf_Shdr* shdr, int shnum,
3892 Elf_Sym* stab, char* strtab )
3895 char *symbol = NULL;
3897 Elf_Rela* rtab = (Elf_Rela*) (ehdrC + shdr[shnum].sh_offset);
3898 int nent = shdr[shnum].sh_size / sizeof(Elf_Rela);
3899 int target_shndx = shdr[shnum].sh_info;
3900 int symtab_shndx = shdr[shnum].sh_link;
3902 stab = (Elf_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
3903 targ = (Elf_Addr) (ehdrC + shdr[ target_shndx ].sh_offset);
3904 IF_DEBUG(linker,debugBelch( "relocations for section %d using symtab %d\n",
3905 target_shndx, symtab_shndx ));
3907 for (j = 0; j < nent; j++) {
3908 #if defined(DEBUG) || defined(sparc_HOST_ARCH) || defined(ia64_HOST_ARCH) || defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
3909 /* This #ifdef only serves to avoid unused-var warnings. */
3910 Elf_Addr offset = rtab[j].r_offset;
3911 Elf_Addr P = targ + offset;
3913 Elf_Addr info = rtab[j].r_info;
3914 Elf_Addr A = rtab[j].r_addend;
3918 # if defined(sparc_HOST_ARCH)
3919 Elf_Word* pP = (Elf_Word*)P;
3921 # elif defined(powerpc_HOST_ARCH)
3925 IF_DEBUG(linker,debugBelch( "Rel entry %3d is raw(%6p %6p %6p) ",
3926 j, (void*)offset, (void*)info,
3929 IF_DEBUG(linker,debugBelch( " ZERO" ));
3932 Elf_Sym sym = stab[ELF_R_SYM(info)];
3933 /* First see if it is a local symbol. */
3934 if (ELF_ST_BIND(sym.st_info) == STB_LOCAL) {
3935 /* Yes, so we can get the address directly from the ELF symbol
3937 symbol = sym.st_name==0 ? "(noname)" : strtab+sym.st_name;
3939 (ehdrC + shdr[ sym.st_shndx ].sh_offset
3940 + stab[ELF_R_SYM(info)].st_value);
3941 #ifdef ELF_FUNCTION_DESC
3942 /* Make a function descriptor for this function */
3943 if (S && ELF_ST_TYPE(sym.st_info) == STT_FUNC) {
3944 S = allocateFunctionDesc(S + A);
3949 /* No, so look up the name in our global table. */
3950 symbol = strtab + sym.st_name;
3951 S_tmp = lookupSymbol( symbol );
3952 S = (Elf_Addr)S_tmp;
3954 #ifdef ELF_FUNCTION_DESC
3955 /* If a function, already a function descriptor - we would
3956 have to copy it to add an offset. */
3957 if (S && (ELF_ST_TYPE(sym.st_info) == STT_FUNC) && (A != 0))
3958 errorBelch("%s: function %s with addend %p", oc->fileName, symbol, (void *)A);
3962 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3965 IF_DEBUG(linker,debugBelch( "`%s' resolves to %p", symbol, (void*)S ));
3968 IF_DEBUG(linker,debugBelch("Reloc: P = %p S = %p A = %p\n",
3969 (void*)P, (void*)S, (void*)A ));
3970 /* checkProddableBlock ( oc, (void*)P ); */
3974 switch (ELF_R_TYPE(info)) {
3975 # if defined(sparc_HOST_ARCH)
3976 case R_SPARC_WDISP30:
3977 w1 = *pP & 0xC0000000;
3978 w2 = (Elf_Word)((value - P) >> 2);
3979 ASSERT((w2 & 0xC0000000) == 0);
3984 w1 = *pP & 0xFFC00000;
3985 w2 = (Elf_Word)(value >> 10);
3986 ASSERT((w2 & 0xFFC00000) == 0);
3992 w2 = (Elf_Word)(value & 0x3FF);
3993 ASSERT((w2 & ~0x3FF) == 0);
3998 /* According to the Sun documentation:
4000 This relocation type resembles R_SPARC_32, except it refers to an
4001 unaligned word. That is, the word to be relocated must be treated
4002 as four separate bytes with arbitrary alignment, not as a word
4003 aligned according to the architecture requirements.
4006 w2 = (Elf_Word)value;
4008 // SPARC doesn't do misaligned writes of 32 bit words,
4009 // so we have to do this one byte-at-a-time.
4010 char *pPc = (char*)pP;
4011 pPc[0] = (char) ((Elf_Word)(w2 & 0xff000000) >> 24);
4012 pPc[1] = (char) ((Elf_Word)(w2 & 0x00ff0000) >> 16);
4013 pPc[2] = (char) ((Elf_Word)(w2 & 0x0000ff00) >> 8);
4014 pPc[3] = (char) ((Elf_Word)(w2 & 0x000000ff));
4018 w2 = (Elf_Word)value;
4021 # elif defined(powerpc_HOST_ARCH)
4022 case R_PPC_ADDR16_LO:
4023 *(Elf32_Half*) P = value;
4026 case R_PPC_ADDR16_HI:
4027 *(Elf32_Half*) P = value >> 16;
4030 case R_PPC_ADDR16_HA:
4031 *(Elf32_Half*) P = (value + 0x8000) >> 16;
4035 *(Elf32_Word *) P = value;
4039 *(Elf32_Word *) P = value - P;
4045 if( delta << 6 >> 6 != delta )
4047 value = (Elf_Addr) (&makeSymbolExtra( oc, ELF_R_SYM(info), value )
4051 if( value == 0 || delta << 6 >> 6 != delta )
4053 barf( "Unable to make SymbolExtra for #%d",
4059 *(Elf_Word *) P = (*(Elf_Word *) P & 0xfc000003)
4060 | (delta & 0x3fffffc);
4064 #if x86_64_HOST_ARCH
4066 *(Elf64_Xword *)P = value;
4071 #if defined(ALWAYS_PIC)
4072 barf("R_X86_64_PC32 relocation, but ALWAYS_PIC.");
4074 StgInt64 off = value - P;
4075 if (off >= 0x7fffffffL || off < -0x80000000L) {
4076 #if X86_64_ELF_NONPIC_HACK
4077 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4079 off = pltAddress + A - P;
4081 barf("R_X86_64_PC32 relocation out of range: %s = %p\nRecompile %s with -fPIC.",
4082 symbol, off, oc->fileName );
4085 *(Elf64_Word *)P = (Elf64_Word)off;
4092 StgInt64 off = value - P;
4093 *(Elf64_Word *)P = (Elf64_Word)off;
4098 #if defined(ALWAYS_PIC)
4099 barf("R_X86_64_32 relocation, but ALWAYS_PIC.");
4101 if (value >= 0x7fffffffL) {
4102 #if X86_64_ELF_NONPIC_HACK
4103 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4105 value = pltAddress + A;
4107 barf("R_X86_64_32 relocation out of range: %s = %p\nRecompile %s with -fPIC.",
4108 symbol, value, oc->fileName );
4111 *(Elf64_Word *)P = (Elf64_Word)value;
4116 #if defined(ALWAYS_PIC)
4117 barf("R_X86_64_32S relocation, but ALWAYS_PIC.");
4119 if ((StgInt64)value > 0x7fffffffL || (StgInt64)value < -0x80000000L) {
4120 #if X86_64_ELF_NONPIC_HACK
4121 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4123 value = pltAddress + A;
4125 barf("R_X86_64_32S relocation out of range: %s = %p\nRecompile %s with -fPIC.",
4126 symbol, value, oc->fileName );
4129 *(Elf64_Sword *)P = (Elf64_Sword)value;
4133 case R_X86_64_GOTPCREL:
4135 StgInt64 gotAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)->addr;
4136 StgInt64 off = gotAddress + A - P;
4137 *(Elf64_Word *)P = (Elf64_Word)off;
4141 case R_X86_64_PLT32:
4143 #if defined(ALWAYS_PIC)
4144 barf("R_X86_64_PLT32 relocation, but ALWAYS_PIC.");
4146 StgInt64 off = value - P;
4147 if (off >= 0x7fffffffL || off < -0x80000000L) {
4148 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4150 off = pltAddress + A - P;
4152 *(Elf64_Word *)P = (Elf64_Word)off;
4159 errorBelch("%s: unhandled ELF relocation(RelA) type %lu\n",
4160 oc->fileName, (lnat)ELF_R_TYPE(info));
4169 ocResolve_ELF ( ObjectCode* oc )
4173 Elf_Sym* stab = NULL;
4174 char* ehdrC = (char*)(oc->image);
4175 Elf_Ehdr* ehdr = (Elf_Ehdr*) ehdrC;
4176 Elf_Shdr* shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
4178 /* first find "the" symbol table */
4179 stab = (Elf_Sym*) findElfSection ( ehdrC, SHT_SYMTAB );
4181 /* also go find the string table */
4182 strtab = findElfSection ( ehdrC, SHT_STRTAB );
4184 if (stab == NULL || strtab == NULL) {
4185 errorBelch("%s: can't find string or symbol table", oc->fileName);
4189 /* Process the relocation sections. */
4190 for (shnum = 0; shnum < ehdr->e_shnum; shnum++) {
4191 if (shdr[shnum].sh_type == SHT_REL) {
4192 ok = do_Elf_Rel_relocations ( oc, ehdrC, shdr,
4193 shnum, stab, strtab );
4197 if (shdr[shnum].sh_type == SHT_RELA) {
4198 ok = do_Elf_Rela_relocations ( oc, ehdrC, shdr,
4199 shnum, stab, strtab );
4204 #if defined(powerpc_HOST_ARCH)
4205 ocFlushInstructionCache( oc );
4212 * PowerPC & X86_64 ELF specifics
4215 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
4217 static int ocAllocateSymbolExtras_ELF( ObjectCode *oc )
4223 ehdr = (Elf_Ehdr *) oc->image;
4224 shdr = (Elf_Shdr *) ( ((char *)oc->image) + ehdr->e_shoff );
4226 for( i = 0; i < ehdr->e_shnum; i++ )
4227 if( shdr[i].sh_type == SHT_SYMTAB )
4230 if( i == ehdr->e_shnum )
4232 errorBelch( "This ELF file contains no symtab" );
4236 if( shdr[i].sh_entsize != sizeof( Elf_Sym ) )
4238 errorBelch( "The entry size (%d) of the symtab isn't %d\n",
4239 (int) shdr[i].sh_entsize, (int) sizeof( Elf_Sym ) );
4244 return ocAllocateSymbolExtras( oc, shdr[i].sh_size / sizeof( Elf_Sym ), 0 );
4247 #endif /* powerpc */
4251 /* --------------------------------------------------------------------------
4253 * ------------------------------------------------------------------------*/
4255 #if defined(OBJFORMAT_MACHO)
4258 Support for MachO linking on Darwin/MacOS X
4259 by Wolfgang Thaller (wolfgang.thaller@gmx.net)
4261 I hereby formally apologize for the hackish nature of this code.
4262 Things that need to be done:
4263 *) implement ocVerifyImage_MachO
4264 *) add still more sanity checks.
4267 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
4268 #define mach_header mach_header_64
4269 #define segment_command segment_command_64
4270 #define section section_64
4271 #define nlist nlist_64
4274 #ifdef powerpc_HOST_ARCH
4275 static int ocAllocateSymbolExtras_MachO(ObjectCode* oc)
4277 struct mach_header *header = (struct mach_header *) oc->image;
4278 struct load_command *lc = (struct load_command *) (header + 1);
4281 for( i = 0; i < header->ncmds; i++ )
4283 if( lc->cmd == LC_SYMTAB )
4285 // Find out the first and last undefined external
4286 // symbol, so we don't have to allocate too many
4288 struct symtab_command *symLC = (struct symtab_command *) lc;
4289 unsigned min = symLC->nsyms, max = 0;
4290 struct nlist *nlist =
4291 symLC ? (struct nlist*) ((char*) oc->image + symLC->symoff)
4293 for(i=0;i<symLC->nsyms;i++)
4295 if(nlist[i].n_type & N_STAB)
4297 else if(nlist[i].n_type & N_EXT)
4299 if((nlist[i].n_type & N_TYPE) == N_UNDF
4300 && (nlist[i].n_value == 0))
4310 return ocAllocateSymbolExtras(oc, max - min + 1, min);
4315 lc = (struct load_command *) ( ((char *)lc) + lc->cmdsize );
4317 return ocAllocateSymbolExtras(oc,0,0);
4320 #ifdef x86_64_HOST_ARCH
4321 static int ocAllocateSymbolExtras_MachO(ObjectCode* oc)
4323 struct mach_header *header = (struct mach_header *) oc->image;
4324 struct load_command *lc = (struct load_command *) (header + 1);
4327 for( i = 0; i < header->ncmds; i++ )
4329 if( lc->cmd == LC_SYMTAB )
4331 // Just allocate one entry for every symbol
4332 struct symtab_command *symLC = (struct symtab_command *) lc;
4334 return ocAllocateSymbolExtras(oc, symLC->nsyms, 0);
4337 lc = (struct load_command *) ( ((char *)lc) + lc->cmdsize );
4339 return ocAllocateSymbolExtras(oc,0,0);
4343 static int ocVerifyImage_MachO(ObjectCode* oc)
4345 char *image = (char*) oc->image;
4346 struct mach_header *header = (struct mach_header*) image;
4348 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
4349 if(header->magic != MH_MAGIC_64) {
4350 errorBelch("%s: Bad magic. Expected: %08x, got: %08x.\n",
4351 oc->fileName, MH_MAGIC_64, header->magic);
4355 if(header->magic != MH_MAGIC) {
4356 errorBelch("%s: Bad magic. Expected: %08x, got: %08x.\n",
4357 oc->fileName, MH_MAGIC, header->magic);
4361 // FIXME: do some more verifying here
4365 static int resolveImports(
4368 struct symtab_command *symLC,
4369 struct section *sect, // ptr to lazy or non-lazy symbol pointer section
4370 unsigned long *indirectSyms,
4371 struct nlist *nlist)
4374 size_t itemSize = 4;
4376 IF_DEBUG(linker, debugBelch("resolveImports: start\n"));
4379 int isJumpTable = 0;
4380 if(!strcmp(sect->sectname,"__jump_table"))
4384 ASSERT(sect->reserved2 == itemSize);
4388 for(i=0; i*itemSize < sect->size;i++)
4390 // according to otool, reserved1 contains the first index into the indirect symbol table
4391 struct nlist *symbol = &nlist[indirectSyms[sect->reserved1+i]];
4392 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4395 IF_DEBUG(linker, debugBelch("resolveImports: resolving %s\n", nm));
4396 if ((symbol->n_type & N_TYPE) == N_UNDF
4397 && (symbol->n_type & N_EXT) && (symbol->n_value != 0)) {
4398 addr = (void*) (symbol->n_value);
4399 IF_DEBUG(linker, debugBelch("resolveImports: undefined external %s has value %p\n", nm, addr));
4401 addr = lookupSymbol(nm);
4402 IF_DEBUG(linker, debugBelch("resolveImports: looking up %s, %p\n", nm, addr));
4406 errorBelch("\n%s: unknown symbol `%s'", oc->fileName, nm);
4414 checkProddableBlock(oc,image + sect->offset + i*itemSize);
4415 *(image + sect->offset + i*itemSize) = 0xe9; // jmp
4416 *(unsigned*)(image + sect->offset + i*itemSize + 1)
4417 = (char*)addr - (image + sect->offset + i*itemSize + 5);
4422 checkProddableBlock(oc,((void**)(image + sect->offset)) + i);
4423 ((void**)(image + sect->offset))[i] = addr;
4427 IF_DEBUG(linker, debugBelch("resolveImports: done\n"));
4431 static unsigned long relocateAddress(
4434 struct section* sections,
4435 unsigned long address)
4438 IF_DEBUG(linker, debugBelch("relocateAddress: start\n"));
4439 for (i = 0; i < nSections; i++)
4441 IF_DEBUG(linker, debugBelch(" relocating address in section %d\n", i));
4442 if (sections[i].addr <= address
4443 && address < sections[i].addr + sections[i].size)
4445 return (unsigned long)oc->image
4446 + sections[i].offset + address - sections[i].addr;
4449 barf("Invalid Mach-O file:"
4450 "Address out of bounds while relocating object file");
4454 static int relocateSection(
4457 struct symtab_command *symLC, struct nlist *nlist,
4458 int nSections, struct section* sections, struct section *sect)
4460 struct relocation_info *relocs;
4463 IF_DEBUG(linker, debugBelch("relocateSection: start\n"));
4465 if(!strcmp(sect->sectname,"__la_symbol_ptr"))
4467 else if(!strcmp(sect->sectname,"__nl_symbol_ptr"))
4469 else if(!strcmp(sect->sectname,"__la_sym_ptr2"))
4471 else if(!strcmp(sect->sectname,"__la_sym_ptr3"))
4475 IF_DEBUG(linker, debugBelch("relocateSection: number of relocations: %d\n", n));
4477 relocs = (struct relocation_info*) (image + sect->reloff);
4481 #ifdef x86_64_HOST_ARCH
4482 struct relocation_info *reloc = &relocs[i];
4484 char *thingPtr = image + sect->offset + reloc->r_address;
4486 /* We shouldn't need to initialise this, but gcc on OS X 64 bit
4487 complains that it may be used uninitialized if we don't */
4490 int type = reloc->r_type;
4492 checkProddableBlock(oc,thingPtr);
4493 switch(reloc->r_length)
4496 thing = *(uint8_t*)thingPtr;
4497 baseValue = (uint64_t)thingPtr + 1;
4500 thing = *(uint16_t*)thingPtr;
4501 baseValue = (uint64_t)thingPtr + 2;
4504 thing = *(uint32_t*)thingPtr;
4505 baseValue = (uint64_t)thingPtr + 4;
4508 thing = *(uint64_t*)thingPtr;
4509 baseValue = (uint64_t)thingPtr + 8;
4512 barf("Unknown size.");
4516 debugBelch("relocateSection: length = %d, thing = %d, baseValue = %p\n",
4517 reloc->r_length, thing, baseValue));
4519 if (type == X86_64_RELOC_GOT
4520 || type == X86_64_RELOC_GOT_LOAD)
4522 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4523 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4525 IF_DEBUG(linker, debugBelch("relocateSection: making jump island for %s, extern = %d, X86_64_RELOC_GOT\n", nm, reloc->r_extern));
4526 ASSERT(reloc->r_extern);
4527 value = (uint64_t) &makeSymbolExtra(oc, reloc->r_symbolnum, (unsigned long)lookupSymbol(nm))->addr;
4529 type = X86_64_RELOC_SIGNED;
4531 else if(reloc->r_extern)
4533 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4534 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4536 IF_DEBUG(linker, debugBelch("relocateSection: looking up external symbol %s\n", nm));
4537 IF_DEBUG(linker, debugBelch(" : type = %d\n", symbol->n_type));
4538 IF_DEBUG(linker, debugBelch(" : sect = %d\n", symbol->n_sect));
4539 IF_DEBUG(linker, debugBelch(" : desc = %d\n", symbol->n_desc));
4540 IF_DEBUG(linker, debugBelch(" : value = %d\n", symbol->n_value));
4541 if ((symbol->n_type & N_TYPE) == N_SECT) {
4542 value = relocateAddress(oc, nSections, sections,
4544 IF_DEBUG(linker, debugBelch("relocateSection, defined external symbol %s, relocated address %p\n", nm, value));
4547 value = (uint64_t) lookupSymbol(nm);
4548 IF_DEBUG(linker, debugBelch("relocateSection: external symbol %s, address %p\n", nm, value));
4553 value = sections[reloc->r_symbolnum-1].offset
4554 - sections[reloc->r_symbolnum-1].addr
4558 IF_DEBUG(linker, debugBelch("relocateSection: value = %p\n", value));
4560 if (type == X86_64_RELOC_BRANCH)
4562 if((int32_t)(value - baseValue) != (int64_t)(value - baseValue))
4564 ASSERT(reloc->r_extern);
4565 value = (uint64_t) &makeSymbolExtra(oc, reloc->r_symbolnum, value)
4568 ASSERT((int32_t)(value - baseValue) == (int64_t)(value - baseValue));
4569 type = X86_64_RELOC_SIGNED;
4574 case X86_64_RELOC_UNSIGNED:
4575 ASSERT(!reloc->r_pcrel);
4578 case X86_64_RELOC_SIGNED:
4579 case X86_64_RELOC_SIGNED_1:
4580 case X86_64_RELOC_SIGNED_2:
4581 case X86_64_RELOC_SIGNED_4:
4582 ASSERT(reloc->r_pcrel);
4583 thing += value - baseValue;
4585 case X86_64_RELOC_SUBTRACTOR:
4586 ASSERT(!reloc->r_pcrel);
4590 barf("unkown relocation");
4593 switch(reloc->r_length)
4596 *(uint8_t*)thingPtr = thing;
4599 *(uint16_t*)thingPtr = thing;
4602 *(uint32_t*)thingPtr = thing;
4605 *(uint64_t*)thingPtr = thing;
4609 if(relocs[i].r_address & R_SCATTERED)
4611 struct scattered_relocation_info *scat =
4612 (struct scattered_relocation_info*) &relocs[i];
4616 if(scat->r_length == 2)
4618 unsigned long word = 0;
4619 unsigned long* wordPtr = (unsigned long*) (image + sect->offset + scat->r_address);
4620 checkProddableBlock(oc,wordPtr);
4622 // Note on relocation types:
4623 // i386 uses the GENERIC_RELOC_* types,
4624 // while ppc uses special PPC_RELOC_* types.
4625 // *_RELOC_VANILLA and *_RELOC_PAIR have the same value
4626 // in both cases, all others are different.
4627 // Therefore, we use GENERIC_RELOC_VANILLA
4628 // and GENERIC_RELOC_PAIR instead of the PPC variants,
4629 // and use #ifdefs for the other types.
4631 // Step 1: Figure out what the relocated value should be
4632 if(scat->r_type == GENERIC_RELOC_VANILLA)
4634 word = *wordPtr + (unsigned long) relocateAddress(
4641 #ifdef powerpc_HOST_ARCH
4642 else if(scat->r_type == PPC_RELOC_SECTDIFF
4643 || scat->r_type == PPC_RELOC_LO16_SECTDIFF
4644 || scat->r_type == PPC_RELOC_HI16_SECTDIFF
4645 || scat->r_type == PPC_RELOC_HA16_SECTDIFF
4646 || scat->r_type == PPC_RELOC_LOCAL_SECTDIFF)
4648 else if(scat->r_type == GENERIC_RELOC_SECTDIFF
4649 || scat->r_type == GENERIC_RELOC_LOCAL_SECTDIFF)
4652 struct scattered_relocation_info *pair =
4653 (struct scattered_relocation_info*) &relocs[i+1];
4655 if(!pair->r_scattered || pair->r_type != GENERIC_RELOC_PAIR)
4656 barf("Invalid Mach-O file: "
4657 "RELOC_*_SECTDIFF not followed by RELOC_PAIR");
4659 word = (unsigned long)
4660 (relocateAddress(oc, nSections, sections, scat->r_value)
4661 - relocateAddress(oc, nSections, sections, pair->r_value));
4664 #ifdef powerpc_HOST_ARCH
4665 else if(scat->r_type == PPC_RELOC_HI16
4666 || scat->r_type == PPC_RELOC_LO16
4667 || scat->r_type == PPC_RELOC_HA16
4668 || scat->r_type == PPC_RELOC_LO14)
4669 { // these are generated by label+offset things
4670 struct relocation_info *pair = &relocs[i+1];
4671 if((pair->r_address & R_SCATTERED) || pair->r_type != PPC_RELOC_PAIR)
4672 barf("Invalid Mach-O file: "
4673 "PPC_RELOC_* not followed by PPC_RELOC_PAIR");
4675 if(scat->r_type == PPC_RELOC_LO16)
4677 word = ((unsigned short*) wordPtr)[1];
4678 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4680 else if(scat->r_type == PPC_RELOC_LO14)
4682 barf("Unsupported Relocation: PPC_RELOC_LO14");
4683 word = ((unsigned short*) wordPtr)[1] & 0xFFFC;
4684 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4686 else if(scat->r_type == PPC_RELOC_HI16)
4688 word = ((unsigned short*) wordPtr)[1] << 16;
4689 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF);
4691 else if(scat->r_type == PPC_RELOC_HA16)
4693 word = ((unsigned short*) wordPtr)[1] << 16;
4694 word += ((short)relocs[i+1].r_address & (short)0xFFFF);
4698 word += (unsigned long) relocateAddress(oc, nSections, sections, scat->r_value)
4706 barf ("Don't know how to handle this Mach-O "
4707 "scattered relocation entry: "
4708 "object file %s; entry type %ld; "
4710 OC_INFORMATIVE_FILENAME(oc),
4716 #ifdef powerpc_HOST_ARCH
4717 if(scat->r_type == GENERIC_RELOC_VANILLA
4718 || scat->r_type == PPC_RELOC_SECTDIFF)
4720 if(scat->r_type == GENERIC_RELOC_VANILLA
4721 || scat->r_type == GENERIC_RELOC_SECTDIFF
4722 || scat->r_type == GENERIC_RELOC_LOCAL_SECTDIFF)
4727 #ifdef powerpc_HOST_ARCH
4728 else if(scat->r_type == PPC_RELOC_LO16_SECTDIFF || scat->r_type == PPC_RELOC_LO16)
4730 ((unsigned short*) wordPtr)[1] = word & 0xFFFF;
4732 else if(scat->r_type == PPC_RELOC_HI16_SECTDIFF || scat->r_type == PPC_RELOC_HI16)
4734 ((unsigned short*) wordPtr)[1] = (word >> 16) & 0xFFFF;
4736 else if(scat->r_type == PPC_RELOC_HA16_SECTDIFF || scat->r_type == PPC_RELOC_HA16)
4738 ((unsigned short*) wordPtr)[1] = ((word >> 16) & 0xFFFF)
4739 + ((word & (1<<15)) ? 1 : 0);
4745 barf("Can't handle Mach-O scattered relocation entry "
4746 "with this r_length tag: "
4747 "object file %s; entry type %ld; "
4748 "r_length tag %ld; address %#lx\n",
4749 OC_INFORMATIVE_FILENAME(oc),
4756 else /* scat->r_pcrel */
4758 barf("Don't know how to handle *PC-relative* Mach-O "
4759 "scattered relocation entry: "
4760 "object file %s; entry type %ld; address %#lx\n",
4761 OC_INFORMATIVE_FILENAME(oc),
4768 else /* !(relocs[i].r_address & R_SCATTERED) */
4770 struct relocation_info *reloc = &relocs[i];
4771 if(reloc->r_pcrel && !reloc->r_extern)
4774 if(reloc->r_length == 2)
4776 unsigned long word = 0;
4777 #ifdef powerpc_HOST_ARCH
4778 unsigned long jumpIsland = 0;
4779 long offsetToJumpIsland = 0xBADBAD42; // initialise to bad value
4780 // to avoid warning and to catch
4784 unsigned long* wordPtr = (unsigned long*) (image + sect->offset + reloc->r_address);
4785 checkProddableBlock(oc,wordPtr);
4787 if(reloc->r_type == GENERIC_RELOC_VANILLA)
4791 #ifdef powerpc_HOST_ARCH
4792 else if(reloc->r_type == PPC_RELOC_LO16)
4794 word = ((unsigned short*) wordPtr)[1];
4795 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4797 else if(reloc->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(reloc->r_type == PPC_RELOC_HA16)
4804 word = ((unsigned short*) wordPtr)[1] << 16;
4805 word += ((short)relocs[i+1].r_address & (short)0xFFFF);
4807 else if(reloc->r_type == PPC_RELOC_BR24)
4810 word = (word & 0x03FFFFFC) | ((word & 0x02000000) ? 0xFC000000 : 0);
4815 barf("Can't handle this Mach-O relocation entry "
4817 "object file %s; entry type %ld; address %#lx\n",
4818 OC_INFORMATIVE_FILENAME(oc),
4824 if(!reloc->r_extern)
4827 sections[reloc->r_symbolnum-1].offset
4828 - sections[reloc->r_symbolnum-1].addr
4835 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4836 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4837 void *symbolAddress = lookupSymbol(nm);
4840 errorBelch("\nunknown symbol `%s'", nm);
4846 #ifdef powerpc_HOST_ARCH
4847 // In the .o file, this should be a relative jump to NULL
4848 // and we'll change it to a relative jump to the symbol
4849 ASSERT(word + reloc->r_address == 0);
4850 jumpIsland = (unsigned long)
4851 &makeSymbolExtra(oc,
4853 (unsigned long) symbolAddress)
4857 offsetToJumpIsland = word + jumpIsland
4858 - (((long)image) + sect->offset - sect->addr);
4861 word += (unsigned long) symbolAddress
4862 - (((long)image) + sect->offset - sect->addr);
4866 word += (unsigned long) symbolAddress;
4870 if(reloc->r_type == GENERIC_RELOC_VANILLA)
4875 #ifdef powerpc_HOST_ARCH
4876 else if(reloc->r_type == PPC_RELOC_LO16)
4878 ((unsigned short*) wordPtr)[1] = word & 0xFFFF;
4881 else if(reloc->r_type == PPC_RELOC_HI16)
4883 ((unsigned short*) wordPtr)[1] = (word >> 16) & 0xFFFF;
4886 else if(reloc->r_type == PPC_RELOC_HA16)
4888 ((unsigned short*) wordPtr)[1] = ((word >> 16) & 0xFFFF)
4889 + ((word & (1<<15)) ? 1 : 0);
4892 else if(reloc->r_type == PPC_RELOC_BR24)
4894 if((word & 0x03) != 0)
4895 barf("%s: unconditional relative branch with a displacement "
4896 "which isn't a multiple of 4 bytes: %#lx",
4897 OC_INFORMATIVE_FILENAME(oc),
4900 if((word & 0xFE000000) != 0xFE000000 &&
4901 (word & 0xFE000000) != 0x00000000)
4903 // The branch offset is too large.
4904 // Therefore, we try to use a jump island.
4907 barf("%s: unconditional relative branch out of range: "
4908 "no jump island available: %#lx",
4909 OC_INFORMATIVE_FILENAME(oc),
4913 word = offsetToJumpIsland;
4914 if((word & 0xFE000000) != 0xFE000000 &&
4915 (word & 0xFE000000) != 0x00000000)
4916 barf("%s: unconditional relative branch out of range: "
4917 "jump island out of range: %#lx",
4918 OC_INFORMATIVE_FILENAME(oc),
4921 *wordPtr = (*wordPtr & 0xFC000003) | (word & 0x03FFFFFC);
4928 barf("Can't handle Mach-O relocation entry (not scattered) "
4929 "with this r_length tag: "
4930 "object file %s; entry type %ld; "
4931 "r_length tag %ld; address %#lx\n",
4932 OC_INFORMATIVE_FILENAME(oc),
4941 IF_DEBUG(linker, debugBelch("relocateSection: done\n"));
4945 static int ocGetNames_MachO(ObjectCode* oc)
4947 char *image = (char*) oc->image;
4948 struct mach_header *header = (struct mach_header*) image;
4949 struct load_command *lc = (struct load_command*) (image + sizeof(struct mach_header));
4950 unsigned i,curSymbol = 0;
4951 struct segment_command *segLC = NULL;
4952 struct section *sections;
4953 struct symtab_command *symLC = NULL;
4954 struct nlist *nlist;
4955 unsigned long commonSize = 0;
4956 char *commonStorage = NULL;
4957 unsigned long commonCounter;
4959 IF_DEBUG(linker,debugBelch("ocGetNames_MachO: start\n"));
4961 for(i=0;i<header->ncmds;i++)
4963 if(lc->cmd == LC_SEGMENT || lc->cmd == LC_SEGMENT_64)
4964 segLC = (struct segment_command*) lc;
4965 else if(lc->cmd == LC_SYMTAB)
4966 symLC = (struct symtab_command*) lc;
4967 lc = (struct load_command *) ( ((char*)lc) + lc->cmdsize );
4970 sections = (struct section*) (segLC+1);
4971 nlist = symLC ? (struct nlist*) (image + symLC->symoff)
4975 barf("ocGetNames_MachO: no segment load command");
4977 for(i=0;i<segLC->nsects;i++)
4979 // IF_DEBUG(linker, debugBelch("ocGetNames_MachO: segment %d\n"));
4980 if (sections[i].size == 0)
4983 if((sections[i].flags & SECTION_TYPE) == S_ZEROFILL)
4985 char * zeroFillArea = stgCallocBytes(1,sections[i].size,
4986 "ocGetNames_MachO(common symbols)");
4987 sections[i].offset = zeroFillArea - image;
4990 if(!strcmp(sections[i].sectname,"__text"))
4991 addSection(oc, SECTIONKIND_CODE_OR_RODATA,
4992 (void*) (image + sections[i].offset),
4993 (void*) (image + sections[i].offset + sections[i].size));
4994 else if(!strcmp(sections[i].sectname,"__const"))
4995 addSection(oc, SECTIONKIND_RWDATA,
4996 (void*) (image + sections[i].offset),
4997 (void*) (image + sections[i].offset + sections[i].size));
4998 else if(!strcmp(sections[i].sectname,"__data"))
4999 addSection(oc, SECTIONKIND_RWDATA,
5000 (void*) (image + sections[i].offset),
5001 (void*) (image + sections[i].offset + sections[i].size));
5002 else if(!strcmp(sections[i].sectname,"__bss")
5003 || !strcmp(sections[i].sectname,"__common"))
5004 addSection(oc, SECTIONKIND_RWDATA,
5005 (void*) (image + sections[i].offset),
5006 (void*) (image + sections[i].offset + sections[i].size));
5008 addProddableBlock(oc, (void*) (image + sections[i].offset),
5012 // count external symbols defined here
5016 for(i=0;i<symLC->nsyms;i++)
5018 if(nlist[i].n_type & N_STAB)
5020 else if(nlist[i].n_type & N_EXT)
5022 if((nlist[i].n_type & N_TYPE) == N_UNDF
5023 && (nlist[i].n_value != 0))
5025 commonSize += nlist[i].n_value;
5028 else if((nlist[i].n_type & N_TYPE) == N_SECT)
5033 IF_DEBUG(linker, debugBelch("ocGetNames_MachO: %d external symbols\n", oc->n_symbols));
5034 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
5035 "ocGetNames_MachO(oc->symbols)");
5039 for(i=0;i<symLC->nsyms;i++)
5041 if(nlist[i].n_type & N_STAB)
5043 else if((nlist[i].n_type & N_TYPE) == N_SECT)
5045 if(nlist[i].n_type & N_EXT)
5047 char *nm = image + symLC->stroff + nlist[i].n_un.n_strx;
5048 if ((nlist[i].n_desc & N_WEAK_DEF) && lookupSymbol(nm)) {
5049 // weak definition, and we already have a definition
5050 IF_DEBUG(linker, debugBelch(" weak: %s\n", nm));
5054 IF_DEBUG(linker, debugBelch("ocGetNames_MachO: inserting %s\n", nm));
5055 ghciInsertStrHashTable(oc->fileName, symhash, nm,
5057 + sections[nlist[i].n_sect-1].offset
5058 - sections[nlist[i].n_sect-1].addr
5059 + nlist[i].n_value);
5060 oc->symbols[curSymbol++] = nm;
5067 commonStorage = stgCallocBytes(1,commonSize,"ocGetNames_MachO(common symbols)");
5068 commonCounter = (unsigned long)commonStorage;
5071 for(i=0;i<symLC->nsyms;i++)
5073 if((nlist[i].n_type & N_TYPE) == N_UNDF
5074 && (nlist[i].n_type & N_EXT) && (nlist[i].n_value != 0))
5076 char *nm = image + symLC->stroff + nlist[i].n_un.n_strx;
5077 unsigned long sz = nlist[i].n_value;
5079 nlist[i].n_value = commonCounter;
5081 IF_DEBUG(linker, debugBelch("ocGetNames_MachO: inserting common symbol: %s\n", nm));
5082 ghciInsertStrHashTable(oc->fileName, symhash, nm,
5083 (void*)commonCounter);
5084 oc->symbols[curSymbol++] = nm;
5086 commonCounter += sz;
5093 static int ocResolve_MachO(ObjectCode* oc)
5095 char *image = (char*) oc->image;
5096 struct mach_header *header = (struct mach_header*) image;
5097 struct load_command *lc = (struct load_command*) (image + sizeof(struct mach_header));
5099 struct segment_command *segLC = NULL;
5100 struct section *sections;
5101 struct symtab_command *symLC = NULL;
5102 struct dysymtab_command *dsymLC = NULL;
5103 struct nlist *nlist;
5105 IF_DEBUG(linker, debugBelch("ocResolve_MachO: start\n"));
5106 for (i = 0; i < header->ncmds; i++)
5108 if(lc->cmd == LC_SEGMENT || lc->cmd == LC_SEGMENT_64)
5109 segLC = (struct segment_command*) lc;
5110 else if(lc->cmd == LC_SYMTAB)
5111 symLC = (struct symtab_command*) lc;
5112 else if(lc->cmd == LC_DYSYMTAB)
5113 dsymLC = (struct dysymtab_command*) lc;
5114 lc = (struct load_command *) ( ((char*)lc) + lc->cmdsize );
5117 sections = (struct section*) (segLC+1);
5118 nlist = symLC ? (struct nlist*) (image + symLC->symoff)
5123 unsigned long *indirectSyms
5124 = (unsigned long*) (image + dsymLC->indirectsymoff);
5126 IF_DEBUG(linker, debugBelch("ocResolve_MachO: resolving dsymLC\n"));
5127 for (i = 0; i < segLC->nsects; i++)
5129 if( !strcmp(sections[i].sectname,"__la_symbol_ptr")
5130 || !strcmp(sections[i].sectname,"__la_sym_ptr2")
5131 || !strcmp(sections[i].sectname,"__la_sym_ptr3"))
5133 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
5136 else if(!strcmp(sections[i].sectname,"__nl_symbol_ptr")
5137 || !strcmp(sections[i].sectname,"__pointers"))
5139 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
5142 else if(!strcmp(sections[i].sectname,"__jump_table"))
5144 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
5149 IF_DEBUG(linker, debugBelch("ocResolve_MachO: unknown section\n"));
5154 for(i=0;i<segLC->nsects;i++)
5156 IF_DEBUG(linker, debugBelch("ocResolve_MachO: relocating section %d\n", i));
5158 if (!relocateSection(oc,image,symLC,nlist,segLC->nsects,sections,§ions[i]))
5162 #if defined (powerpc_HOST_ARCH)
5163 ocFlushInstructionCache( oc );
5169 #ifdef powerpc_HOST_ARCH
5171 * The Mach-O object format uses leading underscores. But not everywhere.
5172 * There is a small number of runtime support functions defined in
5173 * libcc_dynamic.a whose name does not have a leading underscore.
5174 * As a consequence, we can't get their address from C code.
5175 * We have to use inline assembler just to take the address of a function.
5179 extern void* symbolsWithoutUnderscore[];
5181 static void machoInitSymbolsWithoutUnderscore()
5183 void **p = symbolsWithoutUnderscore;
5184 __asm__ volatile(".globl _symbolsWithoutUnderscore\n.data\n_symbolsWithoutUnderscore:");
5186 #undef SymI_NeedsProto
5187 #define SymI_NeedsProto(x) \
5188 __asm__ volatile(".long " # x);
5190 RTS_MACHO_NOUNDERLINE_SYMBOLS
5192 __asm__ volatile(".text");
5194 #undef SymI_NeedsProto
5195 #define SymI_NeedsProto(x) \
5196 ghciInsertStrHashTable("(GHCi built-in symbols)", symhash, #x, *p++);
5198 RTS_MACHO_NOUNDERLINE_SYMBOLS
5200 #undef SymI_NeedsProto
5206 * Figure out by how much to shift the entire Mach-O file in memory
5207 * when loading so that its single segment ends up 16-byte-aligned
5209 static int machoGetMisalignment( FILE * f )
5211 struct mach_header header;
5214 fread(&header, sizeof(header), 1, f);
5217 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
5218 if(header.magic != MH_MAGIC_64) {
5219 errorBelch("Bad magic. Expected: %08x, got: %08x.\n",
5220 MH_MAGIC_64, header->magic);
5224 if(header.magic != MH_MAGIC) {
5225 errorBelch("Bad magic. Expected: %08x, got: %08x.\n",
5226 MH_MAGIC, header->magic);
5231 misalignment = (header.sizeofcmds + sizeof(header))
5234 return misalignment ? (16 - misalignment) : 0;