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
124 #ifdef darwin_HOST_OS
130 #if defined(OBJFORMAT_ELF)
131 static int ocVerifyImage_ELF ( ObjectCode* oc );
132 static int ocGetNames_ELF ( ObjectCode* oc );
133 static int ocResolve_ELF ( ObjectCode* oc );
134 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
135 static int ocAllocateSymbolExtras_ELF ( ObjectCode* oc );
137 #elif defined(OBJFORMAT_PEi386)
138 static int ocVerifyImage_PEi386 ( ObjectCode* oc );
139 static int ocGetNames_PEi386 ( ObjectCode* oc );
140 static int ocResolve_PEi386 ( ObjectCode* oc );
141 static void *lookupSymbolInDLLs ( unsigned char *lbl );
142 static void zapTrailingAtSign ( unsigned char *sym );
143 #elif defined(OBJFORMAT_MACHO)
144 static int ocVerifyImage_MachO ( ObjectCode* oc );
145 static int ocGetNames_MachO ( ObjectCode* oc );
146 static int ocResolve_MachO ( ObjectCode* oc );
149 static int machoGetMisalignment( FILE * );
151 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
152 static int ocAllocateSymbolExtras_MachO ( ObjectCode* oc );
154 #ifdef powerpc_HOST_ARCH
155 static void machoInitSymbolsWithoutUnderscore( void );
159 /* on x86_64 we have a problem with relocating symbol references in
160 * code that was compiled without -fPIC. By default, the small memory
161 * model is used, which assumes that symbol references can fit in a
162 * 32-bit slot. The system dynamic linker makes this work for
163 * references to shared libraries by either (a) allocating a jump
164 * table slot for code references, or (b) moving the symbol at load
165 * time (and copying its contents, if necessary) for data references.
167 * We unfortunately can't tell whether symbol references are to code
168 * or data. So for now we assume they are code (the vast majority
169 * are), and allocate jump-table slots. Unfortunately this will
170 * SILENTLY generate crashing code for data references. This hack is
171 * enabled by X86_64_ELF_NONPIC_HACK.
173 * One workaround is to use shared Haskell libraries. This is
174 * coming. Another workaround is to keep the static libraries but
175 * compile them with -fPIC, because that will generate PIC references
176 * to data which can be relocated. The PIC code is still too green to
177 * do this systematically, though.
180 * See thread http://www.haskell.org/pipermail/cvs-ghc/2007-September/038458.html
182 * Naming Scheme for Symbol Macros
184 * SymI_*: symbol is internal to the RTS. It resides in an object
185 * file/library that is statically.
186 * SymE_*: symbol is external to the RTS library. It might be linked
189 * Sym*_HasProto : the symbol prototype is imported in an include file
190 * or defined explicitly
191 * Sym*_NeedsProto: the symbol is undefined and we add a dummy
192 * default proto extern void sym(void);
194 #define X86_64_ELF_NONPIC_HACK 1
196 /* Link objects into the lower 2Gb on x86_64. GHC assumes the
197 * small memory model on this architecture (see gcc docs,
200 * MAP_32BIT not available on OpenBSD/amd64
202 #if defined(x86_64_HOST_ARCH) && defined(MAP_32BIT)
203 #define TRY_MAP_32BIT MAP_32BIT
205 #define TRY_MAP_32BIT 0
209 * Due to the small memory model (see above), on x86_64 we have to map
210 * all our non-PIC object files into the low 2Gb of the address space
211 * (why 2Gb and not 4Gb? Because all addresses must be reachable
212 * using a 32-bit signed PC-relative offset). On Linux we can do this
213 * using the MAP_32BIT flag to mmap(), however on other OSs
214 * (e.g. *BSD, see #2063, and also on Linux inside Xen, see #2512), we
215 * can't do this. So on these systems, we have to pick a base address
216 * in the low 2Gb of the address space and try to allocate memory from
219 * We pick a default address based on the OS, but also make this
220 * configurable via an RTS flag (+RTS -xm)
222 #if !defined(ALWAYS_PIC) && defined(x86_64_HOST_ARCH)
224 #if defined(MAP_32BIT)
225 // Try to use MAP_32BIT
226 #define MMAP_32BIT_BASE_DEFAULT 0
229 #define MMAP_32BIT_BASE_DEFAULT 0x40000000
232 static void *mmap_32bit_base = (void *)MMAP_32BIT_BASE_DEFAULT;
235 /* MAP_ANONYMOUS is MAP_ANON on some systems, e.g. OpenBSD */
236 #if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
237 #define MAP_ANONYMOUS MAP_ANON
240 /* -----------------------------------------------------------------------------
241 * Built-in symbols from the RTS
244 typedef struct _RtsSymbolVal {
249 #define Maybe_Stable_Names SymI_HasProto(stg_mkWeakzh) \
250 SymI_HasProto(stg_mkWeakForeignEnvzh) \
251 SymI_HasProto(stg_makeStableNamezh) \
252 SymI_HasProto(stg_finalizzeWeakzh)
254 #if !defined (mingw32_HOST_OS)
255 #define RTS_POSIX_ONLY_SYMBOLS \
256 SymI_HasProto(__hscore_get_saved_termios) \
257 SymI_HasProto(__hscore_set_saved_termios) \
258 SymI_HasProto(shutdownHaskellAndSignal) \
259 SymI_HasProto(lockFile) \
260 SymI_HasProto(unlockFile) \
261 SymI_HasProto(signal_handlers) \
262 SymI_HasProto(stg_sig_install) \
263 SymI_NeedsProto(nocldstop)
266 #if defined (cygwin32_HOST_OS)
267 #define RTS_MINGW_ONLY_SYMBOLS /**/
268 /* Don't have the ability to read import libs / archives, so
269 * we have to stupidly list a lot of what libcygwin.a
272 #define RTS_CYGWIN_ONLY_SYMBOLS \
273 SymI_HasProto(regfree) \
274 SymI_HasProto(regexec) \
275 SymI_HasProto(regerror) \
276 SymI_HasProto(regcomp) \
277 SymI_HasProto(__errno) \
278 SymI_HasProto(access) \
279 SymI_HasProto(chmod) \
280 SymI_HasProto(chdir) \
281 SymI_HasProto(close) \
282 SymI_HasProto(creat) \
284 SymI_HasProto(dup2) \
285 SymI_HasProto(fstat) \
286 SymI_HasProto(fcntl) \
287 SymI_HasProto(getcwd) \
288 SymI_HasProto(getenv) \
289 SymI_HasProto(lseek) \
290 SymI_HasProto(open) \
291 SymI_HasProto(fpathconf) \
292 SymI_HasProto(pathconf) \
293 SymI_HasProto(stat) \
295 SymI_HasProto(tanh) \
296 SymI_HasProto(cosh) \
297 SymI_HasProto(sinh) \
298 SymI_HasProto(atan) \
299 SymI_HasProto(acos) \
300 SymI_HasProto(asin) \
306 SymI_HasProto(sqrt) \
307 SymI_HasProto(localtime_r) \
308 SymI_HasProto(gmtime_r) \
309 SymI_HasProto(mktime) \
310 SymI_NeedsProto(_imp___tzname) \
311 SymI_HasProto(gettimeofday) \
312 SymI_HasProto(timezone) \
313 SymI_HasProto(tcgetattr) \
314 SymI_HasProto(tcsetattr) \
315 SymI_HasProto(memcpy) \
316 SymI_HasProto(memmove) \
317 SymI_HasProto(realloc) \
318 SymI_HasProto(malloc) \
319 SymI_HasProto(free) \
320 SymI_HasProto(fork) \
321 SymI_HasProto(lstat) \
322 SymI_HasProto(isatty) \
323 SymI_HasProto(mkdir) \
324 SymI_HasProto(opendir) \
325 SymI_HasProto(readdir) \
326 SymI_HasProto(rewinddir) \
327 SymI_HasProto(closedir) \
328 SymI_HasProto(link) \
329 SymI_HasProto(mkfifo) \
330 SymI_HasProto(pipe) \
331 SymI_HasProto(read) \
332 SymI_HasProto(rename) \
333 SymI_HasProto(rmdir) \
334 SymI_HasProto(select) \
335 SymI_HasProto(system) \
336 SymI_HasProto(write) \
337 SymI_HasProto(strcmp) \
338 SymI_HasProto(strcpy) \
339 SymI_HasProto(strncpy) \
340 SymI_HasProto(strerror) \
341 SymI_HasProto(sigaddset) \
342 SymI_HasProto(sigemptyset) \
343 SymI_HasProto(sigprocmask) \
344 SymI_HasProto(umask) \
345 SymI_HasProto(uname) \
346 SymI_HasProto(unlink) \
347 SymI_HasProto(utime) \
348 SymI_HasProto(waitpid)
350 #elif !defined(mingw32_HOST_OS)
351 #define RTS_MINGW_ONLY_SYMBOLS /**/
352 #define RTS_CYGWIN_ONLY_SYMBOLS /**/
353 #else /* defined(mingw32_HOST_OS) */
354 #define RTS_POSIX_ONLY_SYMBOLS /**/
355 #define RTS_CYGWIN_ONLY_SYMBOLS /**/
357 /* Extra syms gen'ed by mingw-2's gcc-3.2: */
359 #define RTS_MINGW_EXTRA_SYMS \
360 SymI_NeedsProto(_imp____mb_cur_max) \
361 SymI_NeedsProto(_imp___pctype)
363 #define RTS_MINGW_EXTRA_SYMS
366 #if HAVE_GETTIMEOFDAY
367 #define RTS_MINGW_GETTIMEOFDAY_SYM SymI_NeedsProto(gettimeofday)
369 #define RTS_MINGW_GETTIMEOFDAY_SYM /**/
372 #if HAVE___MINGW_VFPRINTF
373 #define RTS___MINGW_VFPRINTF_SYM SymI_HasProto(__mingw_vfprintf)
375 #define RTS___MINGW_VFPRINTF_SYM /**/
378 /* These are statically linked from the mingw libraries into the ghc
379 executable, so we have to employ this hack. */
380 #define RTS_MINGW_ONLY_SYMBOLS \
381 SymI_HasProto(stg_asyncReadzh) \
382 SymI_HasProto(stg_asyncWritezh) \
383 SymI_HasProto(stg_asyncDoProczh) \
384 SymI_HasProto(memset) \
385 SymI_HasProto(inet_ntoa) \
386 SymI_HasProto(inet_addr) \
387 SymI_HasProto(htonl) \
388 SymI_HasProto(recvfrom) \
389 SymI_HasProto(listen) \
390 SymI_HasProto(bind) \
391 SymI_HasProto(shutdown) \
392 SymI_HasProto(connect) \
393 SymI_HasProto(htons) \
394 SymI_HasProto(ntohs) \
395 SymI_HasProto(getservbyname) \
396 SymI_HasProto(getservbyport) \
397 SymI_HasProto(getprotobynumber) \
398 SymI_HasProto(getprotobyname) \
399 SymI_HasProto(gethostbyname) \
400 SymI_HasProto(gethostbyaddr) \
401 SymI_HasProto(gethostname) \
402 SymI_HasProto(strcpy) \
403 SymI_HasProto(strncpy) \
404 SymI_HasProto(abort) \
405 SymI_NeedsProto(_alloca) \
406 SymI_HasProto(isxdigit) \
407 SymI_HasProto(isupper) \
408 SymI_HasProto(ispunct) \
409 SymI_HasProto(islower) \
410 SymI_HasProto(isspace) \
411 SymI_HasProto(isprint) \
412 SymI_HasProto(isdigit) \
413 SymI_HasProto(iscntrl) \
414 SymI_HasProto(isalpha) \
415 SymI_HasProto(isalnum) \
416 SymI_HasProto(isascii) \
417 RTS___MINGW_VFPRINTF_SYM \
418 SymI_HasProto(strcmp) \
419 SymI_HasProto(memmove) \
420 SymI_HasProto(realloc) \
421 SymI_HasProto(malloc) \
423 SymI_HasProto(tanh) \
424 SymI_HasProto(cosh) \
425 SymI_HasProto(sinh) \
426 SymI_HasProto(atan) \
427 SymI_HasProto(acos) \
428 SymI_HasProto(asin) \
434 SymI_HasProto(sqrt) \
435 SymI_HasProto(powf) \
436 SymI_HasProto(tanhf) \
437 SymI_HasProto(coshf) \
438 SymI_HasProto(sinhf) \
439 SymI_HasProto(atanf) \
440 SymI_HasProto(acosf) \
441 SymI_HasProto(asinf) \
442 SymI_HasProto(tanf) \
443 SymI_HasProto(cosf) \
444 SymI_HasProto(sinf) \
445 SymI_HasProto(expf) \
446 SymI_HasProto(logf) \
447 SymI_HasProto(sqrtf) \
449 SymI_HasProto(erfc) \
450 SymI_HasProto(erff) \
451 SymI_HasProto(erfcf) \
452 SymI_HasProto(memcpy) \
453 SymI_HasProto(rts_InstallConsoleEvent) \
454 SymI_HasProto(rts_ConsoleHandlerDone) \
455 SymI_NeedsProto(mktime) \
456 SymI_NeedsProto(_imp___timezone) \
457 SymI_NeedsProto(_imp___tzname) \
458 SymI_NeedsProto(_imp__tzname) \
459 SymI_NeedsProto(_imp___iob) \
460 SymI_NeedsProto(_imp___osver) \
461 SymI_NeedsProto(localtime) \
462 SymI_NeedsProto(gmtime) \
463 SymI_NeedsProto(opendir) \
464 SymI_NeedsProto(readdir) \
465 SymI_NeedsProto(rewinddir) \
466 RTS_MINGW_EXTRA_SYMS \
467 RTS_MINGW_GETTIMEOFDAY_SYM \
468 SymI_NeedsProto(closedir)
471 #if defined(darwin_HOST_OS) && HAVE_PRINTF_LDBLSTUB
472 #define RTS_DARWIN_ONLY_SYMBOLS \
473 SymI_NeedsProto(asprintf$LDBLStub) \
474 SymI_NeedsProto(err$LDBLStub) \
475 SymI_NeedsProto(errc$LDBLStub) \
476 SymI_NeedsProto(errx$LDBLStub) \
477 SymI_NeedsProto(fprintf$LDBLStub) \
478 SymI_NeedsProto(fscanf$LDBLStub) \
479 SymI_NeedsProto(fwprintf$LDBLStub) \
480 SymI_NeedsProto(fwscanf$LDBLStub) \
481 SymI_NeedsProto(printf$LDBLStub) \
482 SymI_NeedsProto(scanf$LDBLStub) \
483 SymI_NeedsProto(snprintf$LDBLStub) \
484 SymI_NeedsProto(sprintf$LDBLStub) \
485 SymI_NeedsProto(sscanf$LDBLStub) \
486 SymI_NeedsProto(strtold$LDBLStub) \
487 SymI_NeedsProto(swprintf$LDBLStub) \
488 SymI_NeedsProto(swscanf$LDBLStub) \
489 SymI_NeedsProto(syslog$LDBLStub) \
490 SymI_NeedsProto(vasprintf$LDBLStub) \
491 SymI_NeedsProto(verr$LDBLStub) \
492 SymI_NeedsProto(verrc$LDBLStub) \
493 SymI_NeedsProto(verrx$LDBLStub) \
494 SymI_NeedsProto(vfprintf$LDBLStub) \
495 SymI_NeedsProto(vfscanf$LDBLStub) \
496 SymI_NeedsProto(vfwprintf$LDBLStub) \
497 SymI_NeedsProto(vfwscanf$LDBLStub) \
498 SymI_NeedsProto(vprintf$LDBLStub) \
499 SymI_NeedsProto(vscanf$LDBLStub) \
500 SymI_NeedsProto(vsnprintf$LDBLStub) \
501 SymI_NeedsProto(vsprintf$LDBLStub) \
502 SymI_NeedsProto(vsscanf$LDBLStub) \
503 SymI_NeedsProto(vswprintf$LDBLStub) \
504 SymI_NeedsProto(vswscanf$LDBLStub) \
505 SymI_NeedsProto(vsyslog$LDBLStub) \
506 SymI_NeedsProto(vwarn$LDBLStub) \
507 SymI_NeedsProto(vwarnc$LDBLStub) \
508 SymI_NeedsProto(vwarnx$LDBLStub) \
509 SymI_NeedsProto(vwprintf$LDBLStub) \
510 SymI_NeedsProto(vwscanf$LDBLStub) \
511 SymI_NeedsProto(warn$LDBLStub) \
512 SymI_NeedsProto(warnc$LDBLStub) \
513 SymI_NeedsProto(warnx$LDBLStub) \
514 SymI_NeedsProto(wcstold$LDBLStub) \
515 SymI_NeedsProto(wprintf$LDBLStub) \
516 SymI_NeedsProto(wscanf$LDBLStub)
518 #define RTS_DARWIN_ONLY_SYMBOLS
522 # define MAIN_CAP_SYM SymI_HasProto(MainCapability)
524 # define MAIN_CAP_SYM
527 #if !defined(mingw32_HOST_OS)
528 #define RTS_USER_SIGNALS_SYMBOLS \
529 SymI_HasProto(setIOManagerControlFd) \
530 SymI_HasProto(setIOManagerWakeupFd) \
531 SymI_HasProto(ioManagerWakeup) \
532 SymI_HasProto(blockUserSignals) \
533 SymI_HasProto(unblockUserSignals)
535 #define RTS_USER_SIGNALS_SYMBOLS \
536 SymI_HasProto(ioManagerWakeup) \
537 SymI_HasProto(sendIOManagerEvent) \
538 SymI_HasProto(readIOManagerEvent) \
539 SymI_HasProto(getIOManagerEvent) \
540 SymI_HasProto(console_handler)
543 #define RTS_LIBFFI_SYMBOLS \
544 SymE_NeedsProto(ffi_prep_cif) \
545 SymE_NeedsProto(ffi_call) \
546 SymE_NeedsProto(ffi_type_void) \
547 SymE_NeedsProto(ffi_type_float) \
548 SymE_NeedsProto(ffi_type_double) \
549 SymE_NeedsProto(ffi_type_sint64) \
550 SymE_NeedsProto(ffi_type_uint64) \
551 SymE_NeedsProto(ffi_type_sint32) \
552 SymE_NeedsProto(ffi_type_uint32) \
553 SymE_NeedsProto(ffi_type_sint16) \
554 SymE_NeedsProto(ffi_type_uint16) \
555 SymE_NeedsProto(ffi_type_sint8) \
556 SymE_NeedsProto(ffi_type_uint8) \
557 SymE_NeedsProto(ffi_type_pointer)
559 #ifdef TABLES_NEXT_TO_CODE
560 #define RTS_RET_SYMBOLS /* nothing */
562 #define RTS_RET_SYMBOLS \
563 SymI_HasProto(stg_enter_ret) \
564 SymI_HasProto(stg_gc_fun_ret) \
565 SymI_HasProto(stg_ap_v_ret) \
566 SymI_HasProto(stg_ap_f_ret) \
567 SymI_HasProto(stg_ap_d_ret) \
568 SymI_HasProto(stg_ap_l_ret) \
569 SymI_HasProto(stg_ap_n_ret) \
570 SymI_HasProto(stg_ap_p_ret) \
571 SymI_HasProto(stg_ap_pv_ret) \
572 SymI_HasProto(stg_ap_pp_ret) \
573 SymI_HasProto(stg_ap_ppv_ret) \
574 SymI_HasProto(stg_ap_ppp_ret) \
575 SymI_HasProto(stg_ap_pppv_ret) \
576 SymI_HasProto(stg_ap_pppp_ret) \
577 SymI_HasProto(stg_ap_ppppp_ret) \
578 SymI_HasProto(stg_ap_pppppp_ret)
581 /* Modules compiled with -ticky may mention ticky counters */
582 /* This list should marry up with the one in $(TOP)/includes/stg/Ticky.h */
583 #define RTS_TICKY_SYMBOLS \
584 SymI_NeedsProto(ticky_entry_ctrs) \
585 SymI_NeedsProto(top_ct) \
587 SymI_HasProto(ENT_VIA_NODE_ctr) \
588 SymI_HasProto(ENT_STATIC_THK_ctr) \
589 SymI_HasProto(ENT_DYN_THK_ctr) \
590 SymI_HasProto(ENT_STATIC_FUN_DIRECT_ctr) \
591 SymI_HasProto(ENT_DYN_FUN_DIRECT_ctr) \
592 SymI_HasProto(ENT_STATIC_CON_ctr) \
593 SymI_HasProto(ENT_DYN_CON_ctr) \
594 SymI_HasProto(ENT_STATIC_IND_ctr) \
595 SymI_HasProto(ENT_DYN_IND_ctr) \
596 SymI_HasProto(ENT_PERM_IND_ctr) \
597 SymI_HasProto(ENT_PAP_ctr) \
598 SymI_HasProto(ENT_AP_ctr) \
599 SymI_HasProto(ENT_AP_STACK_ctr) \
600 SymI_HasProto(ENT_BH_ctr) \
601 SymI_HasProto(UNKNOWN_CALL_ctr) \
602 SymI_HasProto(SLOW_CALL_v_ctr) \
603 SymI_HasProto(SLOW_CALL_f_ctr) \
604 SymI_HasProto(SLOW_CALL_d_ctr) \
605 SymI_HasProto(SLOW_CALL_l_ctr) \
606 SymI_HasProto(SLOW_CALL_n_ctr) \
607 SymI_HasProto(SLOW_CALL_p_ctr) \
608 SymI_HasProto(SLOW_CALL_pv_ctr) \
609 SymI_HasProto(SLOW_CALL_pp_ctr) \
610 SymI_HasProto(SLOW_CALL_ppv_ctr) \
611 SymI_HasProto(SLOW_CALL_ppp_ctr) \
612 SymI_HasProto(SLOW_CALL_pppv_ctr) \
613 SymI_HasProto(SLOW_CALL_pppp_ctr) \
614 SymI_HasProto(SLOW_CALL_ppppp_ctr) \
615 SymI_HasProto(SLOW_CALL_pppppp_ctr) \
616 SymI_HasProto(SLOW_CALL_OTHER_ctr) \
617 SymI_HasProto(ticky_slow_call_unevald) \
618 SymI_HasProto(SLOW_CALL_ctr) \
619 SymI_HasProto(MULTI_CHUNK_SLOW_CALL_ctr) \
620 SymI_HasProto(MULTI_CHUNK_SLOW_CALL_CHUNKS_ctr) \
621 SymI_HasProto(KNOWN_CALL_ctr) \
622 SymI_HasProto(KNOWN_CALL_TOO_FEW_ARGS_ctr) \
623 SymI_HasProto(KNOWN_CALL_EXTRA_ARGS_ctr) \
624 SymI_HasProto(SLOW_CALL_FUN_TOO_FEW_ctr) \
625 SymI_HasProto(SLOW_CALL_FUN_CORRECT_ctr) \
626 SymI_HasProto(SLOW_CALL_FUN_TOO_MANY_ctr) \
627 SymI_HasProto(SLOW_CALL_PAP_TOO_FEW_ctr) \
628 SymI_HasProto(SLOW_CALL_PAP_CORRECT_ctr) \
629 SymI_HasProto(SLOW_CALL_PAP_TOO_MANY_ctr) \
630 SymI_HasProto(SLOW_CALL_UNEVALD_ctr) \
631 SymI_HasProto(UPDF_OMITTED_ctr) \
632 SymI_HasProto(UPDF_PUSHED_ctr) \
633 SymI_HasProto(CATCHF_PUSHED_ctr) \
634 SymI_HasProto(UPDF_RCC_PUSHED_ctr) \
635 SymI_HasProto(UPDF_RCC_OMITTED_ctr) \
636 SymI_HasProto(UPD_SQUEEZED_ctr) \
637 SymI_HasProto(UPD_CON_IN_NEW_ctr) \
638 SymI_HasProto(UPD_CON_IN_PLACE_ctr) \
639 SymI_HasProto(UPD_PAP_IN_NEW_ctr) \
640 SymI_HasProto(UPD_PAP_IN_PLACE_ctr) \
641 SymI_HasProto(ALLOC_HEAP_ctr) \
642 SymI_HasProto(ALLOC_HEAP_tot) \
643 SymI_HasProto(ALLOC_FUN_ctr) \
644 SymI_HasProto(ALLOC_FUN_adm) \
645 SymI_HasProto(ALLOC_FUN_gds) \
646 SymI_HasProto(ALLOC_FUN_slp) \
647 SymI_HasProto(UPD_NEW_IND_ctr) \
648 SymI_HasProto(UPD_NEW_PERM_IND_ctr) \
649 SymI_HasProto(UPD_OLD_IND_ctr) \
650 SymI_HasProto(UPD_OLD_PERM_IND_ctr) \
651 SymI_HasProto(UPD_BH_UPDATABLE_ctr) \
652 SymI_HasProto(UPD_BH_SINGLE_ENTRY_ctr) \
653 SymI_HasProto(UPD_CAF_BH_UPDATABLE_ctr) \
654 SymI_HasProto(UPD_CAF_BH_SINGLE_ENTRY_ctr) \
655 SymI_HasProto(GC_SEL_ABANDONED_ctr) \
656 SymI_HasProto(GC_SEL_MINOR_ctr) \
657 SymI_HasProto(GC_SEL_MAJOR_ctr) \
658 SymI_HasProto(GC_FAILED_PROMOTION_ctr) \
659 SymI_HasProto(ALLOC_UP_THK_ctr) \
660 SymI_HasProto(ALLOC_SE_THK_ctr) \
661 SymI_HasProto(ALLOC_THK_adm) \
662 SymI_HasProto(ALLOC_THK_gds) \
663 SymI_HasProto(ALLOC_THK_slp) \
664 SymI_HasProto(ALLOC_CON_ctr) \
665 SymI_HasProto(ALLOC_CON_adm) \
666 SymI_HasProto(ALLOC_CON_gds) \
667 SymI_HasProto(ALLOC_CON_slp) \
668 SymI_HasProto(ALLOC_TUP_ctr) \
669 SymI_HasProto(ALLOC_TUP_adm) \
670 SymI_HasProto(ALLOC_TUP_gds) \
671 SymI_HasProto(ALLOC_TUP_slp) \
672 SymI_HasProto(ALLOC_BH_ctr) \
673 SymI_HasProto(ALLOC_BH_adm) \
674 SymI_HasProto(ALLOC_BH_gds) \
675 SymI_HasProto(ALLOC_BH_slp) \
676 SymI_HasProto(ALLOC_PRIM_ctr) \
677 SymI_HasProto(ALLOC_PRIM_adm) \
678 SymI_HasProto(ALLOC_PRIM_gds) \
679 SymI_HasProto(ALLOC_PRIM_slp) \
680 SymI_HasProto(ALLOC_PAP_ctr) \
681 SymI_HasProto(ALLOC_PAP_adm) \
682 SymI_HasProto(ALLOC_PAP_gds) \
683 SymI_HasProto(ALLOC_PAP_slp) \
684 SymI_HasProto(ALLOC_TSO_ctr) \
685 SymI_HasProto(ALLOC_TSO_adm) \
686 SymI_HasProto(ALLOC_TSO_gds) \
687 SymI_HasProto(ALLOC_TSO_slp) \
688 SymI_HasProto(RET_NEW_ctr) \
689 SymI_HasProto(RET_OLD_ctr) \
690 SymI_HasProto(RET_UNBOXED_TUP_ctr) \
691 SymI_HasProto(RET_SEMI_loads_avoided)
694 // On most platforms, the garbage collector rewrites references
695 // to small integer and char objects to a set of common, shared ones.
697 // We don't do this when compiling to Windows DLLs at the moment because
698 // it doesn't support cross package data references well.
700 #if defined(__PIC__) && defined(mingw32_HOST_OS)
701 #define RTS_INTCHAR_SYMBOLS
703 #define RTS_INTCHAR_SYMBOLS \
704 SymI_HasProto(stg_CHARLIKE_closure) \
705 SymI_HasProto(stg_INTLIKE_closure)
709 #define RTS_SYMBOLS \
712 SymI_HasProto(StgReturn) \
713 SymI_HasProto(stg_enter_info) \
714 SymI_HasProto(stg_gc_void_info) \
715 SymI_HasProto(__stg_gc_enter_1) \
716 SymI_HasProto(stg_gc_noregs) \
717 SymI_HasProto(stg_gc_unpt_r1_info) \
718 SymI_HasProto(stg_gc_unpt_r1) \
719 SymI_HasProto(stg_gc_unbx_r1_info) \
720 SymI_HasProto(stg_gc_unbx_r1) \
721 SymI_HasProto(stg_gc_f1_info) \
722 SymI_HasProto(stg_gc_f1) \
723 SymI_HasProto(stg_gc_d1_info) \
724 SymI_HasProto(stg_gc_d1) \
725 SymI_HasProto(stg_gc_l1_info) \
726 SymI_HasProto(stg_gc_l1) \
727 SymI_HasProto(__stg_gc_fun) \
728 SymI_HasProto(stg_gc_fun_info) \
729 SymI_HasProto(stg_gc_gen) \
730 SymI_HasProto(stg_gc_gen_info) \
731 SymI_HasProto(stg_gc_gen_hp) \
732 SymI_HasProto(stg_gc_ut) \
733 SymI_HasProto(stg_gen_yield) \
734 SymI_HasProto(stg_yield_noregs) \
735 SymI_HasProto(stg_yield_to_interpreter) \
736 SymI_HasProto(stg_gen_block) \
737 SymI_HasProto(stg_block_noregs) \
738 SymI_HasProto(stg_block_1) \
739 SymI_HasProto(stg_block_takemvar) \
740 SymI_HasProto(stg_block_putmvar) \
742 SymI_HasProto(MallocFailHook) \
743 SymI_HasProto(OnExitHook) \
744 SymI_HasProto(OutOfHeapHook) \
745 SymI_HasProto(StackOverflowHook) \
746 SymI_HasProto(addDLL) \
747 SymI_HasProto(__int_encodeDouble) \
748 SymI_HasProto(__word_encodeDouble) \
749 SymI_HasProto(__2Int_encodeDouble) \
750 SymI_HasProto(__int_encodeFloat) \
751 SymI_HasProto(__word_encodeFloat) \
752 SymI_HasProto(stg_atomicallyzh) \
753 SymI_HasProto(barf) \
754 SymI_HasProto(debugBelch) \
755 SymI_HasProto(errorBelch) \
756 SymI_HasProto(sysErrorBelch) \
757 SymI_HasProto(stg_getMaskingStatezh) \
758 SymI_HasProto(stg_maskAsyncExceptionszh) \
759 SymI_HasProto(stg_maskUninterruptiblezh) \
760 SymI_HasProto(stg_catchzh) \
761 SymI_HasProto(stg_catchRetryzh) \
762 SymI_HasProto(stg_catchSTMzh) \
763 SymI_HasProto(stg_checkzh) \
764 SymI_HasProto(closure_flags) \
765 SymI_HasProto(cmp_thread) \
766 SymI_HasProto(createAdjustor) \
767 SymI_HasProto(stg_decodeDoublezu2Intzh) \
768 SymI_HasProto(stg_decodeFloatzuIntzh) \
769 SymI_HasProto(defaultsHook) \
770 SymI_HasProto(stg_delayzh) \
771 SymI_HasProto(stg_deRefWeakzh) \
772 SymI_HasProto(stg_deRefStablePtrzh) \
773 SymI_HasProto(dirty_MUT_VAR) \
774 SymI_HasProto(stg_forkzh) \
775 SymI_HasProto(stg_forkOnzh) \
776 SymI_HasProto(forkProcess) \
777 SymI_HasProto(forkOS_createThread) \
778 SymI_HasProto(freeHaskellFunctionPtr) \
779 SymI_HasProto(getOrSetTypeableStore) \
780 SymI_HasProto(getOrSetGHCConcSignalSignalHandlerStore) \
781 SymI_HasProto(getOrSetGHCConcWindowsPendingDelaysStore) \
782 SymI_HasProto(getOrSetGHCConcWindowsIOManagerThreadStore) \
783 SymI_HasProto(getOrSetGHCConcWindowsProddingStore) \
784 SymI_HasProto(getOrSetSystemEventThreadEventManagerStore) \
785 SymI_HasProto(getOrSetSystemEventThreadIOManagerThreadStore) \
786 SymI_HasProto(genSymZh) \
787 SymI_HasProto(genericRaise) \
788 SymI_HasProto(getProgArgv) \
789 SymI_HasProto(getFullProgArgv) \
790 SymI_HasProto(getStablePtr) \
791 SymI_HasProto(hs_init) \
792 SymI_HasProto(hs_exit) \
793 SymI_HasProto(hs_set_argv) \
794 SymI_HasProto(hs_add_root) \
795 SymI_HasProto(hs_perform_gc) \
796 SymI_HasProto(hs_free_stable_ptr) \
797 SymI_HasProto(hs_free_fun_ptr) \
798 SymI_HasProto(hs_hpc_rootModule) \
799 SymI_HasProto(hs_hpc_module) \
800 SymI_HasProto(initLinker) \
801 SymI_HasProto(stg_unpackClosurezh) \
802 SymI_HasProto(stg_getApStackValzh) \
803 SymI_HasProto(stg_getSparkzh) \
804 SymI_HasProto(stg_numSparkszh) \
805 SymI_HasProto(stg_isCurrentThreadBoundzh) \
806 SymI_HasProto(stg_isEmptyMVarzh) \
807 SymI_HasProto(stg_killThreadzh) \
808 SymI_HasProto(loadArchive) \
809 SymI_HasProto(loadObj) \
810 SymI_HasProto(insertStableSymbol) \
811 SymI_HasProto(insertSymbol) \
812 SymI_HasProto(lookupSymbol) \
813 SymI_HasProto(stg_makeStablePtrzh) \
814 SymI_HasProto(stg_mkApUpd0zh) \
815 SymI_HasProto(stg_myThreadIdzh) \
816 SymI_HasProto(stg_labelThreadzh) \
817 SymI_HasProto(stg_newArrayzh) \
818 SymI_HasProto(stg_newBCOzh) \
819 SymI_HasProto(stg_newByteArrayzh) \
820 SymI_HasProto_redirect(newCAF, newDynCAF) \
821 SymI_HasProto(stg_newMVarzh) \
822 SymI_HasProto(stg_newMutVarzh) \
823 SymI_HasProto(stg_newTVarzh) \
824 SymI_HasProto(stg_noDuplicatezh) \
825 SymI_HasProto(stg_atomicModifyMutVarzh) \
826 SymI_HasProto(stg_newPinnedByteArrayzh) \
827 SymI_HasProto(stg_newAlignedPinnedByteArrayzh) \
828 SymI_HasProto(newSpark) \
829 SymI_HasProto(performGC) \
830 SymI_HasProto(performMajorGC) \
831 SymI_HasProto(prog_argc) \
832 SymI_HasProto(prog_argv) \
833 SymI_HasProto(stg_putMVarzh) \
834 SymI_HasProto(stg_raisezh) \
835 SymI_HasProto(stg_raiseIOzh) \
836 SymI_HasProto(stg_readTVarzh) \
837 SymI_HasProto(stg_readTVarIOzh) \
838 SymI_HasProto(resumeThread) \
839 SymI_HasProto(resolveObjs) \
840 SymI_HasProto(stg_retryzh) \
841 SymI_HasProto(rts_apply) \
842 SymI_HasProto(rts_checkSchedStatus) \
843 SymI_HasProto(rts_eval) \
844 SymI_HasProto(rts_evalIO) \
845 SymI_HasProto(rts_evalLazyIO) \
846 SymI_HasProto(rts_evalStableIO) \
847 SymI_HasProto(rts_eval_) \
848 SymI_HasProto(rts_getBool) \
849 SymI_HasProto(rts_getChar) \
850 SymI_HasProto(rts_getDouble) \
851 SymI_HasProto(rts_getFloat) \
852 SymI_HasProto(rts_getInt) \
853 SymI_HasProto(rts_getInt8) \
854 SymI_HasProto(rts_getInt16) \
855 SymI_HasProto(rts_getInt32) \
856 SymI_HasProto(rts_getInt64) \
857 SymI_HasProto(rts_getPtr) \
858 SymI_HasProto(rts_getFunPtr) \
859 SymI_HasProto(rts_getStablePtr) \
860 SymI_HasProto(rts_getThreadId) \
861 SymI_HasProto(rts_getWord) \
862 SymI_HasProto(rts_getWord8) \
863 SymI_HasProto(rts_getWord16) \
864 SymI_HasProto(rts_getWord32) \
865 SymI_HasProto(rts_getWord64) \
866 SymI_HasProto(rts_lock) \
867 SymI_HasProto(rts_mkBool) \
868 SymI_HasProto(rts_mkChar) \
869 SymI_HasProto(rts_mkDouble) \
870 SymI_HasProto(rts_mkFloat) \
871 SymI_HasProto(rts_mkInt) \
872 SymI_HasProto(rts_mkInt8) \
873 SymI_HasProto(rts_mkInt16) \
874 SymI_HasProto(rts_mkInt32) \
875 SymI_HasProto(rts_mkInt64) \
876 SymI_HasProto(rts_mkPtr) \
877 SymI_HasProto(rts_mkFunPtr) \
878 SymI_HasProto(rts_mkStablePtr) \
879 SymI_HasProto(rts_mkString) \
880 SymI_HasProto(rts_mkWord) \
881 SymI_HasProto(rts_mkWord8) \
882 SymI_HasProto(rts_mkWord16) \
883 SymI_HasProto(rts_mkWord32) \
884 SymI_HasProto(rts_mkWord64) \
885 SymI_HasProto(rts_unlock) \
886 SymI_HasProto(rts_unsafeGetMyCapability) \
887 SymI_HasProto(rtsSupportsBoundThreads) \
888 SymI_HasProto(rts_isProfiled) \
889 SymI_HasProto(setProgArgv) \
890 SymI_HasProto(startupHaskell) \
891 SymI_HasProto(shutdownHaskell) \
892 SymI_HasProto(shutdownHaskellAndExit) \
893 SymI_HasProto(stable_ptr_table) \
894 SymI_HasProto(stackOverflow) \
895 SymI_HasProto(stg_CAF_BLACKHOLE_info) \
896 SymI_HasProto(stg_BLACKHOLE_info) \
897 SymI_HasProto(__stg_EAGER_BLACKHOLE_info) \
898 SymI_HasProto(stg_BLOCKING_QUEUE_CLEAN_info) \
899 SymI_HasProto(stg_BLOCKING_QUEUE_DIRTY_info) \
900 SymI_HasProto(startTimer) \
901 SymI_HasProto(stg_MVAR_CLEAN_info) \
902 SymI_HasProto(stg_MVAR_DIRTY_info) \
903 SymI_HasProto(stg_IND_STATIC_info) \
904 SymI_HasProto(stg_ARR_WORDS_info) \
905 SymI_HasProto(stg_MUT_ARR_PTRS_DIRTY_info) \
906 SymI_HasProto(stg_MUT_ARR_PTRS_FROZEN_info) \
907 SymI_HasProto(stg_MUT_ARR_PTRS_FROZEN0_info) \
908 SymI_HasProto(stg_WEAK_info) \
909 SymI_HasProto(stg_ap_v_info) \
910 SymI_HasProto(stg_ap_f_info) \
911 SymI_HasProto(stg_ap_d_info) \
912 SymI_HasProto(stg_ap_l_info) \
913 SymI_HasProto(stg_ap_n_info) \
914 SymI_HasProto(stg_ap_p_info) \
915 SymI_HasProto(stg_ap_pv_info) \
916 SymI_HasProto(stg_ap_pp_info) \
917 SymI_HasProto(stg_ap_ppv_info) \
918 SymI_HasProto(stg_ap_ppp_info) \
919 SymI_HasProto(stg_ap_pppv_info) \
920 SymI_HasProto(stg_ap_pppp_info) \
921 SymI_HasProto(stg_ap_ppppp_info) \
922 SymI_HasProto(stg_ap_pppppp_info) \
923 SymI_HasProto(stg_ap_0_fast) \
924 SymI_HasProto(stg_ap_v_fast) \
925 SymI_HasProto(stg_ap_f_fast) \
926 SymI_HasProto(stg_ap_d_fast) \
927 SymI_HasProto(stg_ap_l_fast) \
928 SymI_HasProto(stg_ap_n_fast) \
929 SymI_HasProto(stg_ap_p_fast) \
930 SymI_HasProto(stg_ap_pv_fast) \
931 SymI_HasProto(stg_ap_pp_fast) \
932 SymI_HasProto(stg_ap_ppv_fast) \
933 SymI_HasProto(stg_ap_ppp_fast) \
934 SymI_HasProto(stg_ap_pppv_fast) \
935 SymI_HasProto(stg_ap_pppp_fast) \
936 SymI_HasProto(stg_ap_ppppp_fast) \
937 SymI_HasProto(stg_ap_pppppp_fast) \
938 SymI_HasProto(stg_ap_1_upd_info) \
939 SymI_HasProto(stg_ap_2_upd_info) \
940 SymI_HasProto(stg_ap_3_upd_info) \
941 SymI_HasProto(stg_ap_4_upd_info) \
942 SymI_HasProto(stg_ap_5_upd_info) \
943 SymI_HasProto(stg_ap_6_upd_info) \
944 SymI_HasProto(stg_ap_7_upd_info) \
945 SymI_HasProto(stg_exit) \
946 SymI_HasProto(stg_sel_0_upd_info) \
947 SymI_HasProto(stg_sel_10_upd_info) \
948 SymI_HasProto(stg_sel_11_upd_info) \
949 SymI_HasProto(stg_sel_12_upd_info) \
950 SymI_HasProto(stg_sel_13_upd_info) \
951 SymI_HasProto(stg_sel_14_upd_info) \
952 SymI_HasProto(stg_sel_15_upd_info) \
953 SymI_HasProto(stg_sel_1_upd_info) \
954 SymI_HasProto(stg_sel_2_upd_info) \
955 SymI_HasProto(stg_sel_3_upd_info) \
956 SymI_HasProto(stg_sel_4_upd_info) \
957 SymI_HasProto(stg_sel_5_upd_info) \
958 SymI_HasProto(stg_sel_6_upd_info) \
959 SymI_HasProto(stg_sel_7_upd_info) \
960 SymI_HasProto(stg_sel_8_upd_info) \
961 SymI_HasProto(stg_sel_9_upd_info) \
962 SymI_HasProto(stg_upd_frame_info) \
963 SymI_HasProto(stg_bh_upd_frame_info) \
964 SymI_HasProto(suspendThread) \
965 SymI_HasProto(stg_takeMVarzh) \
966 SymI_HasProto(stg_threadStatuszh) \
967 SymI_HasProto(stg_tryPutMVarzh) \
968 SymI_HasProto(stg_tryTakeMVarzh) \
969 SymI_HasProto(stg_unmaskAsyncExceptionszh) \
970 SymI_HasProto(unloadObj) \
971 SymI_HasProto(stg_unsafeThawArrayzh) \
972 SymI_HasProto(stg_waitReadzh) \
973 SymI_HasProto(stg_waitWritezh) \
974 SymI_HasProto(stg_writeTVarzh) \
975 SymI_HasProto(stg_yieldzh) \
976 SymI_NeedsProto(stg_interp_constr_entry) \
977 SymI_HasProto(stg_arg_bitmaps) \
978 SymI_HasProto(alloc_blocks_lim) \
980 SymI_HasProto(allocate) \
981 SymI_HasProto(allocateExec) \
982 SymI_HasProto(freeExec) \
983 SymI_HasProto(getAllocations) \
984 SymI_HasProto(revertCAFs) \
985 SymI_HasProto(RtsFlags) \
986 SymI_NeedsProto(rts_breakpoint_io_action) \
987 SymI_NeedsProto(rts_stop_next_breakpoint) \
988 SymI_NeedsProto(rts_stop_on_exception) \
989 SymI_HasProto(stopTimer) \
990 SymI_HasProto(n_capabilities) \
991 SymI_HasProto(stg_traceCcszh) \
992 SymI_HasProto(stg_traceEventzh) \
993 RTS_USER_SIGNALS_SYMBOLS \
997 // 64-bit support functions in libgcc.a
998 #if defined(__GNUC__) && SIZEOF_VOID_P <= 4
999 #define RTS_LIBGCC_SYMBOLS \
1000 SymI_NeedsProto(__divdi3) \
1001 SymI_NeedsProto(__udivdi3) \
1002 SymI_NeedsProto(__moddi3) \
1003 SymI_NeedsProto(__umoddi3) \
1004 SymI_NeedsProto(__muldi3) \
1005 SymI_NeedsProto(__ashldi3) \
1006 SymI_NeedsProto(__ashrdi3) \
1007 SymI_NeedsProto(__lshrdi3)
1009 #define RTS_LIBGCC_SYMBOLS
1012 #if defined(darwin_HOST_OS) && defined(powerpc_HOST_ARCH)
1013 // Symbols that don't have a leading underscore
1014 // on Mac OS X. They have to receive special treatment,
1015 // see machoInitSymbolsWithoutUnderscore()
1016 #define RTS_MACHO_NOUNDERLINE_SYMBOLS \
1017 SymI_NeedsProto(saveFP) \
1018 SymI_NeedsProto(restFP)
1021 /* entirely bogus claims about types of these symbols */
1022 #define SymI_NeedsProto(vvv) extern void vvv(void);
1023 #if defined(__PIC__) && defined(mingw32_HOST_OS)
1024 #define SymE_HasProto(vvv) SymE_HasProto(vvv);
1025 #define SymE_NeedsProto(vvv) extern void _imp__ ## vvv (void);
1027 #define SymE_NeedsProto(vvv) SymI_NeedsProto(vvv);
1028 #define SymE_HasProto(vvv) SymI_HasProto(vvv)
1030 #define SymI_HasProto(vvv) /**/
1031 #define SymI_HasProto_redirect(vvv,xxx) /**/
1034 RTS_POSIX_ONLY_SYMBOLS
1035 RTS_MINGW_ONLY_SYMBOLS
1036 RTS_CYGWIN_ONLY_SYMBOLS
1037 RTS_DARWIN_ONLY_SYMBOLS
1040 #undef SymI_NeedsProto
1041 #undef SymI_HasProto
1042 #undef SymI_HasProto_redirect
1043 #undef SymE_HasProto
1044 #undef SymE_NeedsProto
1046 #ifdef LEADING_UNDERSCORE
1047 #define MAYBE_LEADING_UNDERSCORE_STR(s) ("_" s)
1049 #define MAYBE_LEADING_UNDERSCORE_STR(s) (s)
1052 #define SymI_HasProto(vvv) { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
1054 #define SymE_HasProto(vvv) { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
1055 (void*)DLL_IMPORT_DATA_REF(vvv) },
1057 #define SymI_NeedsProto(vvv) SymI_HasProto(vvv)
1058 #define SymE_NeedsProto(vvv) SymE_HasProto(vvv)
1060 // SymI_HasProto_redirect allows us to redirect references to one symbol to
1061 // another symbol. See newCAF/newDynCAF for an example.
1062 #define SymI_HasProto_redirect(vvv,xxx) \
1063 { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
1066 static RtsSymbolVal rtsSyms[] = {
1069 RTS_POSIX_ONLY_SYMBOLS
1070 RTS_MINGW_ONLY_SYMBOLS
1071 RTS_CYGWIN_ONLY_SYMBOLS
1072 RTS_DARWIN_ONLY_SYMBOLS
1075 #if defined(darwin_HOST_OS) && defined(i386_HOST_ARCH)
1076 // dyld stub code contains references to this,
1077 // but it should never be called because we treat
1078 // lazy pointers as nonlazy.
1079 { "dyld_stub_binding_helper", (void*)0xDEADBEEF },
1081 { 0, 0 } /* sentinel */
1086 /* -----------------------------------------------------------------------------
1087 * Insert symbols into hash tables, checking for duplicates.
1090 static void ghciInsertStrHashTable ( char* obj_name,
1096 if (lookupHashTable(table, (StgWord)key) == NULL)
1098 insertStrHashTable(table, (StgWord)key, data);
1103 "GHCi runtime linker: fatal error: I found a duplicate definition for symbol\n"
1105 "whilst processing object file\n"
1107 "This could be caused by:\n"
1108 " * Loading two different object files which export the same symbol\n"
1109 " * Specifying the same object file twice on the GHCi command line\n"
1110 " * An incorrect `package.conf' entry, causing some object to be\n"
1112 "GHCi cannot safely continue in this situation. Exiting now. Sorry.\n"
1119 /* -----------------------------------------------------------------------------
1120 * initialize the object linker
1124 static int linker_init_done = 0 ;
1126 #if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1127 static void *dl_prog_handle;
1128 static regex_t re_invalid;
1129 static regex_t re_realso;
1131 static Mutex dl_mutex; // mutex to protect dlopen/dlerror critical section
1139 #if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1143 /* Make initLinker idempotent, so we can call it
1144 before evey relevant operation; that means we
1145 don't need to initialise the linker separately */
1146 if (linker_init_done == 1) { return; } else {
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);
1161 # if defined(OBJFORMAT_MACHO) && defined(powerpc_HOST_ARCH)
1162 machoInitSymbolsWithoutUnderscore();
1165 # if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1166 # if defined(RTLD_DEFAULT)
1167 dl_prog_handle = RTLD_DEFAULT;
1169 dl_prog_handle = dlopen(NULL, RTLD_LAZY);
1170 # endif /* RTLD_DEFAULT */
1172 compileResult = regcomp(&re_invalid,
1173 "(([^ \t()])+\\.so([^ \t:()])*):([ \t])*invalid ELF header",
1175 ASSERT( compileResult == 0 );
1176 compileResult = regcomp(&re_realso,
1177 "GROUP *\\( *(([^ )])+)",
1179 ASSERT( compileResult == 0 );
1182 #if !defined(ALWAYS_PIC) && defined(x86_64_HOST_ARCH)
1183 if (RtsFlags.MiscFlags.linkerMemBase != 0) {
1184 // User-override for mmap_32bit_base
1185 mmap_32bit_base = (void*)RtsFlags.MiscFlags.linkerMemBase;
1189 #if defined(mingw32_HOST_OS)
1191 * These two libraries cause problems when added to the static link,
1192 * but are necessary for resolving symbols in GHCi, hence we load
1193 * them manually here.
1201 exitLinker( void ) {
1202 #if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1203 if (linker_init_done == 1) {
1204 regfree(&re_invalid);
1205 regfree(&re_realso);
1207 closeMutex(&dl_mutex);
1213 /* -----------------------------------------------------------------------------
1214 * Loading DLL or .so dynamic libraries
1215 * -----------------------------------------------------------------------------
1217 * Add a DLL from which symbols may be found. In the ELF case, just
1218 * do RTLD_GLOBAL-style add, so no further messing around needs to
1219 * happen in order that symbols in the loaded .so are findable --
1220 * lookupSymbol() will subsequently see them by dlsym on the program's
1221 * dl-handle. Returns NULL if success, otherwise ptr to an err msg.
1223 * In the PEi386 case, open the DLLs and put handles to them in a
1224 * linked list. When looking for a symbol, try all handles in the
1225 * list. This means that we need to load even DLLs that are guaranteed
1226 * to be in the ghc.exe image already, just so we can get a handle
1227 * to give to loadSymbol, so that we can find the symbols. For such
1228 * libraries, the LoadLibrary call should be a no-op except for returning
1233 #if defined(OBJFORMAT_PEi386)
1234 /* A record for storing handles into DLLs. */
1239 struct _OpenedDLL* next;
1244 /* A list thereof. */
1245 static OpenedDLL* opened_dlls = NULL;
1248 # if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1251 internal_dlopen(const char *dll_name)
1257 // omitted: RTLD_NOW
1258 // see http://www.haskell.org/pipermail/cvs-ghc/2007-September/038570.html
1260 debugBelch("internal_dlopen: dll_name = '%s'\n", dll_name));
1262 //-------------- Begin critical section ------------------
1263 // This critical section is necessary because dlerror() is not
1264 // required to be reentrant (see POSIX -- IEEE Std 1003.1-2008)
1265 // Also, the error message returned must be copied to preserve it
1268 ACQUIRE_LOCK(&dl_mutex);
1269 hdl = dlopen(dll_name, RTLD_LAZY | RTLD_GLOBAL);
1273 /* dlopen failed; return a ptr to the error msg. */
1275 if (errmsg == NULL) errmsg = "addDLL: unknown error";
1276 errmsg_copy = stgMallocBytes(strlen(errmsg)+1, "addDLL");
1277 strcpy(errmsg_copy, errmsg);
1278 errmsg = errmsg_copy;
1280 RELEASE_LOCK(&dl_mutex);
1281 //--------------- End critical section -------------------
1288 addDLL( char *dll_name )
1290 # if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1291 /* ------------------- ELF DLL loader ------------------- */
1294 regmatch_t match[NMATCH];
1297 size_t match_length;
1298 #define MAXLINE 1000
1304 IF_DEBUG(linker, debugBelch("addDLL: dll_name = '%s'\n", dll_name));
1305 errmsg = internal_dlopen(dll_name);
1307 if (errmsg == NULL) {
1311 // GHC Trac ticket #2615
1312 // On some systems (e.g., Gentoo Linux) dynamic files (e.g. libc.so)
1313 // contain linker scripts rather than ELF-format object code. This
1314 // code handles the situation by recognizing the real object code
1315 // file name given in the linker script.
1317 // If an "invalid ELF header" error occurs, it is assumed that the
1318 // .so file contains a linker script instead of ELF object code.
1319 // In this case, the code looks for the GROUP ( ... ) linker
1320 // directive. If one is found, the first file name inside the
1321 // parentheses is treated as the name of a dynamic library and the
1322 // code attempts to dlopen that file. If this is also unsuccessful,
1323 // an error message is returned.
1325 // see if the error message is due to an invalid ELF header
1326 IF_DEBUG(linker, debugBelch("errmsg = '%s'\n", errmsg));
1327 result = regexec(&re_invalid, errmsg, (size_t) NMATCH, match, 0);
1328 IF_DEBUG(linker, debugBelch("result = %i\n", result));
1330 // success -- try to read the named file as a linker script
1331 match_length = (size_t) stg_min((match[1].rm_eo - match[1].rm_so),
1333 strncpy(line, (errmsg+(match[1].rm_so)),match_length);
1334 line[match_length] = '\0'; // make sure string is null-terminated
1335 IF_DEBUG(linker, debugBelch ("file name = '%s'\n", line));
1336 if ((fp = fopen(line, "r")) == NULL) {
1337 return errmsg; // return original error if open fails
1339 // try to find a GROUP ( ... ) command
1340 while (fgets(line, MAXLINE, fp) != NULL) {
1341 IF_DEBUG(linker, debugBelch("input line = %s", line));
1342 if (regexec(&re_realso, line, (size_t) NMATCH, match, 0) == 0) {
1343 // success -- try to dlopen the first named file
1344 IF_DEBUG(linker, debugBelch("match%s\n",""));
1345 line[match[1].rm_eo] = '\0';
1346 errmsg = internal_dlopen(line+match[1].rm_so);
1349 // if control reaches here, no GROUP ( ... ) directive was found
1350 // and the original error message is returned to the caller
1356 # elif defined(OBJFORMAT_PEi386)
1357 /* ------------------- Win32 DLL loader ------------------- */
1365 /* debugBelch("\naddDLL; dll_name = `%s'\n", dll_name); */
1367 /* See if we've already got it, and ignore if so. */
1368 for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next) {
1369 if (0 == strcmp(o_dll->name, dll_name))
1373 /* The file name has no suffix (yet) so that we can try
1374 both foo.dll and foo.drv
1376 The documentation for LoadLibrary says:
1377 If no file name extension is specified in the lpFileName
1378 parameter, the default library extension .dll is
1379 appended. However, the file name string can include a trailing
1380 point character (.) to indicate that the module name has no
1383 buf = stgMallocBytes(strlen(dll_name) + 10, "addDLL");
1384 sprintf(buf, "%s.DLL", dll_name);
1385 instance = LoadLibrary(buf);
1386 if (instance == NULL) {
1387 if (GetLastError() != ERROR_MOD_NOT_FOUND) goto error;
1388 // KAA: allow loading of drivers (like winspool.drv)
1389 sprintf(buf, "%s.DRV", dll_name);
1390 instance = LoadLibrary(buf);
1391 if (instance == NULL) {
1392 if (GetLastError() != ERROR_MOD_NOT_FOUND) goto error;
1393 // #1883: allow loading of unix-style libfoo.dll DLLs
1394 sprintf(buf, "lib%s.DLL", dll_name);
1395 instance = LoadLibrary(buf);
1396 if (instance == NULL) {
1403 /* Add this DLL to the list of DLLs in which to search for symbols. */
1404 o_dll = stgMallocBytes( sizeof(OpenedDLL), "addDLL" );
1405 o_dll->name = stgMallocBytes(1+strlen(dll_name), "addDLL");
1406 strcpy(o_dll->name, dll_name);
1407 o_dll->instance = instance;
1408 o_dll->next = opened_dlls;
1409 opened_dlls = o_dll;
1415 sysErrorBelch(dll_name);
1417 /* LoadLibrary failed; return a ptr to the error msg. */
1418 return "addDLL: could not load DLL";
1421 barf("addDLL: not implemented on this platform");
1425 /* -----------------------------------------------------------------------------
1426 * insert a stable symbol in the hash table
1430 insertStableSymbol(char* obj_name, char* key, StgPtr p)
1432 ghciInsertStrHashTable(obj_name, stablehash, key, getStablePtr(p));
1436 /* -----------------------------------------------------------------------------
1437 * insert a symbol in the hash table
1440 insertSymbol(char* obj_name, char* key, void* data)
1442 ghciInsertStrHashTable(obj_name, symhash, key, data);
1445 /* -----------------------------------------------------------------------------
1446 * lookup a symbol in the hash table
1449 lookupSymbol( char *lbl )
1453 ASSERT(symhash != NULL);
1454 val = lookupStrHashTable(symhash, lbl);
1457 # if defined(OBJFORMAT_ELF)
1458 return dlsym(dl_prog_handle, lbl);
1459 # elif defined(OBJFORMAT_MACHO)
1461 /* On OS X 10.3 and later, we use dlsym instead of the old legacy
1464 HACK: On OS X, global symbols are prefixed with an underscore.
1465 However, dlsym wants us to omit the leading underscore from the
1466 symbol name. For now, we simply strip it off here (and ONLY
1469 ASSERT(lbl[0] == '_');
1470 return dlsym(dl_prog_handle, lbl+1);
1472 if(NSIsSymbolNameDefined(lbl)) {
1473 NSSymbol symbol = NSLookupAndBindSymbol(lbl);
1474 return NSAddressOfSymbol(symbol);
1478 # endif /* HAVE_DLFCN_H */
1479 # elif defined(OBJFORMAT_PEi386)
1482 sym = lookupSymbolInDLLs((unsigned char*)lbl);
1483 if (sym != NULL) { return sym; };
1485 // Also try looking up the symbol without the @N suffix. Some
1486 // DLLs have the suffixes on their symbols, some don't.
1487 zapTrailingAtSign ( (unsigned char*)lbl );
1488 sym = lookupSymbolInDLLs((unsigned char*)lbl);
1489 if (sym != NULL) { return sym; };
1501 /* -----------------------------------------------------------------------------
1502 * Debugging aid: look in GHCi's object symbol tables for symbols
1503 * within DELTA bytes of the specified address, and show their names.
1506 void ghci_enquire ( char* addr );
1508 void ghci_enquire ( char* addr )
1513 const int DELTA = 64;
1518 for (oc = objects; oc; oc = oc->next) {
1519 for (i = 0; i < oc->n_symbols; i++) {
1520 sym = oc->symbols[i];
1521 if (sym == NULL) continue;
1524 a = lookupStrHashTable(symhash, sym);
1527 // debugBelch("ghci_enquire: can't find %s\n", sym);
1529 else if (addr-DELTA <= a && a <= addr+DELTA) {
1530 debugBelch("%p + %3d == `%s'\n", addr, (int)(a - addr), sym);
1538 #define ROUND_UP(x,size) ((x + size - 1) & ~(size - 1))
1541 mmapForLinker (size_t bytes, nat flags, int fd)
1543 void *map_addr = NULL;
1546 static nat fixed = 0;
1548 pagesize = getpagesize();
1549 size = ROUND_UP(bytes, pagesize);
1551 #if !defined(ALWAYS_PIC) && defined(x86_64_HOST_ARCH)
1554 if (mmap_32bit_base != 0) {
1555 map_addr = mmap_32bit_base;
1559 result = mmap(map_addr, size, PROT_EXEC|PROT_READ|PROT_WRITE,
1560 MAP_PRIVATE|TRY_MAP_32BIT|fixed|flags, fd, 0);
1562 if (result == MAP_FAILED) {
1563 sysErrorBelch("mmap %lu bytes at %p",(lnat)size,map_addr);
1564 errorBelch("Try specifying an address with +RTS -xm<addr> -RTS");
1565 stg_exit(EXIT_FAILURE);
1568 #if !defined(ALWAYS_PIC) && defined(x86_64_HOST_ARCH)
1569 if (mmap_32bit_base != 0) {
1570 if (result == map_addr) {
1571 mmap_32bit_base = (StgWord8*)map_addr + size;
1573 if ((W_)result > 0x80000000) {
1574 // oops, we were given memory over 2Gb
1575 #if defined(freebsd_HOST_OS) || defined(dragonfly_HOST_OS)
1576 // Some platforms require MAP_FIXED. This is normally
1577 // a bad idea, because MAP_FIXED will overwrite
1578 // existing mappings.
1579 munmap(result,size);
1583 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);
1586 // hmm, we were given memory somewhere else, but it's
1587 // still under 2Gb so we can use it. Next time, ask
1588 // for memory right after the place we just got some
1589 mmap_32bit_base = (StgWord8*)result + size;
1593 if ((W_)result > 0x80000000) {
1594 // oops, we were given memory over 2Gb
1595 // ... try allocating memory somewhere else?;
1596 debugTrace(DEBUG_linker,"MAP_32BIT didn't work; gave us %lu bytes at 0x%p", bytes, result);
1597 munmap(result, size);
1599 // Set a base address and try again... (guess: 1Gb)
1600 mmap_32bit_base = (void*)0x40000000;
1611 mkOc( char *path, char *image, int imageSize
1613 #ifdef darwin_HOST_OS
1620 oc = stgMallocBytes(sizeof(ObjectCode), "loadArchive(oc)");
1622 # if defined(OBJFORMAT_ELF)
1623 oc->formatName = "ELF";
1624 # elif defined(OBJFORMAT_PEi386)
1625 oc->formatName = "PEi386";
1626 # elif defined(OBJFORMAT_MACHO)
1627 oc->formatName = "Mach-O";
1630 barf("loadObj: not implemented on this platform");
1634 /* sigh, strdup() isn't a POSIX function, so do it the long way */
1635 /* XXX What should this be for an archive? */
1636 oc->fileName = stgMallocBytes( strlen(path)+1, "loadObj" );
1637 strcpy(oc->fileName, path);
1639 oc->fileSize = imageSize;
1641 oc->sections = NULL;
1642 oc->proddables = NULL;
1645 #ifdef darwin_HOST_OS
1646 oc->misalignment = misalignment;
1650 /* chain it onto the list of objects */
1657 #if defined(USE_ARCHIVES_FOR_GHCI)
1659 loadArchive( char *path )
1666 size_t fileNameSize;
1673 file = stgMallocBytes(fileSize, "loadArchive(file)");
1675 f = fopen(path, "rb");
1677 barf("loadObj: can't read `%s'", path);
1679 n = fread ( tmp, 1, 8, f );
1680 if (strncmp(tmp, "!<arch>\n", 8) != 0)
1681 barf("loadArchive: Not an archive: `%s'", path);
1684 n = fread ( file, 1, 16, f );
1690 barf("loadArchive: Failed reading file name from `%s'", path);
1693 n = fread ( tmp, 1, 12, f );
1695 barf("loadArchive: Failed reading mod time from `%s'", path);
1696 n = fread ( tmp, 1, 6, f );
1698 barf("loadArchive: Failed reading owner from `%s'", path);
1699 n = fread ( tmp, 1, 6, f );
1701 barf("loadArchive: Failed reading group from `%s'", path);
1702 n = fread ( tmp, 1, 8, f );
1704 barf("loadArchive: Failed reading mode from `%s'", path);
1705 n = fread ( tmp, 1, 10, f );
1707 barf("loadArchive: Failed reading size from `%s'", path);
1709 for (n = 0; isdigit(tmp[n]); n++);
1711 imageSize = atoi(tmp);
1712 n = fread ( tmp, 1, 2, f );
1713 if (strncmp(tmp, "\x60\x0A", 2) != 0)
1714 barf("loadArchive: Failed reading magic from `%s' at %ld. Got %c%c", path, ftell(f), tmp[0], tmp[1]);
1716 /* Check for BSD-variant large filenames */
1717 if (0 == strncmp(file, "#1/", 3)) {
1719 for (n = 3; isdigit(file[n]); n++);
1721 fileNameSize = atoi(file + 3);
1722 imageSize -= fileNameSize;
1723 if (fileNameSize > fileSize) {
1724 /* Double it to avoid potentially continually
1725 increasing it by 1 */
1726 fileSize = fileNameSize * 2;
1727 file = stgReallocBytes(file, fileSize, "loadArchive(file)");
1729 n = fread ( file, 1, fileNameSize, f );
1730 if (n != fileNameSize)
1731 barf("loadArchive: Failed reading filename from `%s'", path);
1738 for (n = 0; n < fileNameSize - 1; n++) {
1739 if ((file[n] == '.') && (file[n] == 'o')) {
1746 /* We can't mmap from the archive directly, as object
1747 files need to be 8-byte aligned but files in .ar
1748 archives are 2-byte aligned, and if we malloc the
1749 memory then we can be given memory above 2^32, so we
1750 mmap some anonymous memory and use that. We could
1752 image = mmapForLinker(imageSize, MAP_ANONYMOUS, -1);
1753 n = fread ( image, 1, imageSize, f );
1755 barf("loadObj: error whilst reading `%s'", path);
1756 oc = mkOc(path, image, imageSize
1758 #ifdef darwin_HOST_OS
1763 if (0 == loadOc(oc)) {
1769 n = fseek(f, imageSize, SEEK_CUR);
1771 barf("loadArchive: error whilst seeking by %d in `%s'",
1774 /* .ar files are 2-byte aligned */
1775 if (imageSize % 2) {
1776 n = fread ( tmp, 1, 1, f );
1782 barf("loadArchive: Failed reading padding from `%s'", path);
1794 HsInt GNU_ATTRIBUTE(__noreturn__)
1795 loadArchive( char *path STG_UNUSED ) {
1796 barf("loadArchive: not enabled");
1800 /* -----------------------------------------------------------------------------
1801 * Load an obj (populate the global symbol table, but don't resolve yet)
1803 * Returns: 1 if ok, 0 on error.
1806 loadObj( char *path )
1818 IF_DEBUG(linker, debugBelch("loadObj %s\n", path));
1822 /* debugBelch("loadObj %s\n", path ); */
1824 /* Check that we haven't already loaded this object.
1825 Ignore requests to load multiple times */
1829 for (o = objects; o; o = o->next) {
1830 if (0 == strcmp(o->fileName, path)) {
1832 break; /* don't need to search further */
1836 IF_DEBUG(linker, debugBelch(
1837 "GHCi runtime linker: warning: looks like you're trying to load the\n"
1838 "same object file twice:\n"
1840 "GHCi will ignore this, but be warned.\n"
1842 return 1; /* success */
1846 r = stat(path, &st);
1848 IF_DEBUG(linker, debugBelch("File doesn't exist\n"));
1852 fileSize = st.st_size;
1855 /* On many architectures malloc'd memory isn't executable, so we need to use mmap. */
1857 #if defined(openbsd_HOST_OS)
1858 fd = open(path, O_RDONLY, S_IRUSR);
1860 fd = open(path, O_RDONLY);
1863 barf("loadObj: can't open `%s'", path);
1865 image = mmapForLinker(fileSize, 0, fd);
1869 #else /* !USE_MMAP */
1870 /* load the image into memory */
1871 f = fopen(path, "rb");
1873 barf("loadObj: can't read `%s'", path);
1875 # if defined(mingw32_HOST_OS)
1876 // TODO: We would like to use allocateExec here, but allocateExec
1877 // cannot currently allocate blocks large enough.
1878 image = VirtualAlloc(NULL, fileSize, MEM_RESERVE | MEM_COMMIT,
1879 PAGE_EXECUTE_READWRITE);
1880 # elif defined(darwin_HOST_OS)
1881 // In a Mach-O .o file, all sections can and will be misaligned
1882 // if the total size of the headers is not a multiple of the
1883 // desired alignment. This is fine for .o files that only serve
1884 // as input for the static linker, but it's not fine for us,
1885 // as SSE (used by gcc for floating point) and Altivec require
1886 // 16-byte alignment.
1887 // We calculate the correct alignment from the header before
1888 // reading the file, and then we misalign image on purpose so
1889 // that the actual sections end up aligned again.
1890 misalignment = machoGetMisalignment(f);
1891 image = stgMallocBytes(fileSize + misalignment, "loadObj(image)");
1892 image += misalignment;
1894 image = stgMallocBytes(fileSize, "loadObj(image)");
1899 n = fread ( image, 1, fileSize, f );
1901 barf("loadObj: error whilst reading `%s'", path);
1904 #endif /* USE_MMAP */
1906 oc = mkOc(path, image, fileSize
1908 #ifdef darwin_HOST_OS
1918 loadOc( ObjectCode* oc ) {
1921 # if defined(OBJFORMAT_MACHO) && (defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH))
1922 r = ocAllocateSymbolExtras_MachO ( oc );
1924 IF_DEBUG(linker, debugBelch("ocAllocateSymbolExtras_MachO failed\n"));
1927 # elif defined(OBJFORMAT_ELF) && (defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH))
1928 r = ocAllocateSymbolExtras_ELF ( oc );
1930 IF_DEBUG(linker, debugBelch("ocAllocateSymbolExtras_ELF failed\n"));
1935 /* verify the in-memory image */
1936 # if defined(OBJFORMAT_ELF)
1937 r = ocVerifyImage_ELF ( oc );
1938 # elif defined(OBJFORMAT_PEi386)
1939 r = ocVerifyImage_PEi386 ( oc );
1940 # elif defined(OBJFORMAT_MACHO)
1941 r = ocVerifyImage_MachO ( oc );
1943 barf("loadObj: no verify method");
1946 IF_DEBUG(linker, debugBelch("ocVerifyImage_* failed\n"));
1950 /* build the symbol list for this image */
1951 # if defined(OBJFORMAT_ELF)
1952 r = ocGetNames_ELF ( oc );
1953 # elif defined(OBJFORMAT_PEi386)
1954 r = ocGetNames_PEi386 ( oc );
1955 # elif defined(OBJFORMAT_MACHO)
1956 r = ocGetNames_MachO ( oc );
1958 barf("loadObj: no getNames method");
1961 IF_DEBUG(linker, debugBelch("ocGetNames_* failed\n"));
1965 /* loaded, but not resolved yet */
1966 oc->status = OBJECT_LOADED;
1971 /* -----------------------------------------------------------------------------
1972 * resolve all the currently unlinked objects in memory
1974 * Returns: 1 if ok, 0 on error.
1984 for (oc = objects; oc; oc = oc->next) {
1985 if (oc->status != OBJECT_RESOLVED) {
1986 # if defined(OBJFORMAT_ELF)
1987 r = ocResolve_ELF ( oc );
1988 # elif defined(OBJFORMAT_PEi386)
1989 r = ocResolve_PEi386 ( oc );
1990 # elif defined(OBJFORMAT_MACHO)
1991 r = ocResolve_MachO ( oc );
1993 barf("resolveObjs: not implemented on this platform");
1995 if (!r) { return r; }
1996 oc->status = OBJECT_RESOLVED;
2002 /* -----------------------------------------------------------------------------
2003 * delete an object from the pool
2006 unloadObj( char *path )
2008 ObjectCode *oc, *prev;
2010 ASSERT(symhash != NULL);
2011 ASSERT(objects != NULL);
2016 for (oc = objects; oc; prev = oc, oc = oc->next) {
2017 if (!strcmp(oc->fileName,path)) {
2019 /* Remove all the mappings for the symbols within this
2024 for (i = 0; i < oc->n_symbols; i++) {
2025 if (oc->symbols[i] != NULL) {
2026 removeStrHashTable(symhash, oc->symbols[i], NULL);
2034 prev->next = oc->next;
2037 // We're going to leave this in place, in case there are
2038 // any pointers from the heap into it:
2039 // #ifdef mingw32_HOST_OS
2040 // VirtualFree(oc->image);
2042 // stgFree(oc->image);
2044 stgFree(oc->fileName);
2045 stgFree(oc->symbols);
2046 stgFree(oc->sections);
2052 errorBelch("unloadObj: can't find `%s' to unload", path);
2056 /* -----------------------------------------------------------------------------
2057 * Sanity checking. For each ObjectCode, maintain a list of address ranges
2058 * which may be prodded during relocation, and abort if we try and write
2059 * outside any of these.
2061 static void addProddableBlock ( ObjectCode* oc, void* start, int size )
2064 = stgMallocBytes(sizeof(ProddableBlock), "addProddableBlock");
2065 /* debugBelch("aPB %p %p %d\n", oc, start, size); */
2069 pb->next = oc->proddables;
2070 oc->proddables = pb;
2073 static void checkProddableBlock ( ObjectCode* oc, void* addr )
2076 for (pb = oc->proddables; pb != NULL; pb = pb->next) {
2077 char* s = (char*)(pb->start);
2078 char* e = s + pb->size - 1;
2079 char* a = (char*)addr;
2080 /* Assumes that the biggest fixup involves a 4-byte write. This
2081 probably needs to be changed to 8 (ie, +7) on 64-bit
2083 if (a >= s && (a+3) <= e) return;
2085 barf("checkProddableBlock: invalid fixup in runtime linker");
2088 /* -----------------------------------------------------------------------------
2089 * Section management.
2091 static void addSection ( ObjectCode* oc, SectionKind kind,
2092 void* start, void* end )
2094 Section* s = stgMallocBytes(sizeof(Section), "addSection");
2098 s->next = oc->sections;
2101 debugBelch("addSection: %p-%p (size %d), kind %d\n",
2102 start, ((char*)end)-1, end - start + 1, kind );
2107 /* --------------------------------------------------------------------------
2109 * This is about allocating a small chunk of memory for every symbol in the
2110 * object file. We make sure that the SymboLExtras are always "in range" of
2111 * limited-range PC-relative instructions on various platforms by allocating
2112 * them right next to the object code itself.
2115 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
2118 ocAllocateSymbolExtras
2120 Allocate additional space at the end of the object file image to make room
2121 for jump islands (powerpc, x86_64) and GOT entries (x86_64).
2123 PowerPC relative branch instructions have a 24 bit displacement field.
2124 As PPC code is always 4-byte-aligned, this yields a +-32MB range.
2125 If a particular imported symbol is outside this range, we have to redirect
2126 the jump to a short piece of new code that just loads the 32bit absolute
2127 address and jumps there.
2128 On x86_64, PC-relative jumps and PC-relative accesses to the GOT are limited
2131 This function just allocates space for one SymbolExtra for every
2132 undefined symbol in the object file. The code for the jump islands is
2133 filled in by makeSymbolExtra below.
2136 static int ocAllocateSymbolExtras( ObjectCode* oc, int count, int first )
2143 int misalignment = 0;
2144 #ifdef darwin_HOST_OS
2145 misalignment = oc->misalignment;
2151 // round up to the nearest 4
2152 aligned = (oc->fileSize + 3) & ~3;
2155 pagesize = getpagesize();
2156 n = ROUND_UP( oc->fileSize, pagesize );
2157 m = ROUND_UP( aligned + sizeof (SymbolExtra) * count, pagesize );
2159 /* we try to use spare space at the end of the last page of the
2160 * image for the jump islands, but if there isn't enough space
2161 * then we have to map some (anonymously, remembering MAP_32BIT).
2163 if( m > n ) // we need to allocate more pages
2165 oc->symbol_extras = mmapForLinker(sizeof(SymbolExtra) * count,
2170 oc->symbol_extras = (SymbolExtra *) (oc->image + aligned);
2173 oc->image -= misalignment;
2174 oc->image = stgReallocBytes( oc->image,
2176 aligned + sizeof (SymbolExtra) * count,
2177 "ocAllocateSymbolExtras" );
2178 oc->image += misalignment;
2180 oc->symbol_extras = (SymbolExtra *) (oc->image + aligned);
2181 #endif /* USE_MMAP */
2183 memset( oc->symbol_extras, 0, sizeof (SymbolExtra) * count );
2186 oc->symbol_extras = NULL;
2188 oc->first_symbol_extra = first;
2189 oc->n_symbol_extras = count;
2194 static SymbolExtra* makeSymbolExtra( ObjectCode* oc,
2195 unsigned long symbolNumber,
2196 unsigned long target )
2200 ASSERT( symbolNumber >= oc->first_symbol_extra
2201 && symbolNumber - oc->first_symbol_extra < oc->n_symbol_extras);
2203 extra = &oc->symbol_extras[symbolNumber - oc->first_symbol_extra];
2205 #ifdef powerpc_HOST_ARCH
2206 // lis r12, hi16(target)
2207 extra->jumpIsland.lis_r12 = 0x3d80;
2208 extra->jumpIsland.hi_addr = target >> 16;
2210 // ori r12, r12, lo16(target)
2211 extra->jumpIsland.ori_r12_r12 = 0x618c;
2212 extra->jumpIsland.lo_addr = target & 0xffff;
2215 extra->jumpIsland.mtctr_r12 = 0x7d8903a6;
2218 extra->jumpIsland.bctr = 0x4e800420;
2220 #ifdef x86_64_HOST_ARCH
2222 static uint8_t jmp[] = { 0xFF, 0x25, 0xF2, 0xFF, 0xFF, 0xFF };
2223 extra->addr = target;
2224 memcpy(extra->jumpIsland, jmp, 6);
2232 /* --------------------------------------------------------------------------
2233 * PowerPC specifics (instruction cache flushing)
2234 * ------------------------------------------------------------------------*/
2236 #ifdef powerpc_HOST_ARCH
2238 ocFlushInstructionCache
2240 Flush the data & instruction caches.
2241 Because the PPC has split data/instruction caches, we have to
2242 do that whenever we modify code at runtime.
2245 static void ocFlushInstructionCache( ObjectCode *oc )
2247 int n = (oc->fileSize + sizeof( SymbolExtra ) * oc->n_symbol_extras + 3) / 4;
2248 unsigned long *p = (unsigned long *) oc->image;
2252 __asm__ volatile ( "dcbf 0,%0\n\t"
2260 __asm__ volatile ( "sync\n\t"
2266 /* --------------------------------------------------------------------------
2267 * PEi386 specifics (Win32 targets)
2268 * ------------------------------------------------------------------------*/
2270 /* The information for this linker comes from
2271 Microsoft Portable Executable
2272 and Common Object File Format Specification
2273 revision 5.1 January 1998
2274 which SimonM says comes from the MS Developer Network CDs.
2276 It can be found there (on older CDs), but can also be found
2279 http://www.microsoft.com/hwdev/hardware/PECOFF.asp
2281 (this is Rev 6.0 from February 1999).
2283 Things move, so if that fails, try searching for it via
2285 http://www.google.com/search?q=PE+COFF+specification
2287 The ultimate reference for the PE format is the Winnt.h
2288 header file that comes with the Platform SDKs; as always,
2289 implementations will drift wrt their documentation.
2291 A good background article on the PE format is Matt Pietrek's
2292 March 1994 article in Microsoft System Journal (MSJ)
2293 (Vol.9, No. 3): "Peering Inside the PE: A Tour of the
2294 Win32 Portable Executable File Format." The info in there
2295 has recently been updated in a two part article in
2296 MSDN magazine, issues Feb and March 2002,
2297 "Inside Windows: An In-Depth Look into the Win32 Portable
2298 Executable File Format"
2300 John Levine's book "Linkers and Loaders" contains useful
2305 #if defined(OBJFORMAT_PEi386)
2309 typedef unsigned char UChar;
2310 typedef unsigned short UInt16;
2311 typedef unsigned int UInt32;
2318 UInt16 NumberOfSections;
2319 UInt32 TimeDateStamp;
2320 UInt32 PointerToSymbolTable;
2321 UInt32 NumberOfSymbols;
2322 UInt16 SizeOfOptionalHeader;
2323 UInt16 Characteristics;
2327 #define sizeof_COFF_header 20
2334 UInt32 VirtualAddress;
2335 UInt32 SizeOfRawData;
2336 UInt32 PointerToRawData;
2337 UInt32 PointerToRelocations;
2338 UInt32 PointerToLinenumbers;
2339 UInt16 NumberOfRelocations;
2340 UInt16 NumberOfLineNumbers;
2341 UInt32 Characteristics;
2345 #define sizeof_COFF_section 40
2352 UInt16 SectionNumber;
2355 UChar NumberOfAuxSymbols;
2359 #define sizeof_COFF_symbol 18
2364 UInt32 VirtualAddress;
2365 UInt32 SymbolTableIndex;
2370 #define sizeof_COFF_reloc 10
2373 /* From PE spec doc, section 3.3.2 */
2374 /* Note use of MYIMAGE_* since IMAGE_* are already defined in
2375 windows.h -- for the same purpose, but I want to know what I'm
2377 #define MYIMAGE_FILE_RELOCS_STRIPPED 0x0001
2378 #define MYIMAGE_FILE_EXECUTABLE_IMAGE 0x0002
2379 #define MYIMAGE_FILE_DLL 0x2000
2380 #define MYIMAGE_FILE_SYSTEM 0x1000
2381 #define MYIMAGE_FILE_BYTES_REVERSED_HI 0x8000
2382 #define MYIMAGE_FILE_BYTES_REVERSED_LO 0x0080
2383 #define MYIMAGE_FILE_32BIT_MACHINE 0x0100
2385 /* From PE spec doc, section 5.4.2 and 5.4.4 */
2386 #define MYIMAGE_SYM_CLASS_EXTERNAL 2
2387 #define MYIMAGE_SYM_CLASS_STATIC 3
2388 #define MYIMAGE_SYM_UNDEFINED 0
2390 /* From PE spec doc, section 4.1 */
2391 #define MYIMAGE_SCN_CNT_CODE 0x00000020
2392 #define MYIMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040
2393 #define MYIMAGE_SCN_LNK_NRELOC_OVFL 0x01000000
2395 /* From PE spec doc, section 5.2.1 */
2396 #define MYIMAGE_REL_I386_DIR32 0x0006
2397 #define MYIMAGE_REL_I386_REL32 0x0014
2400 /* We use myindex to calculate array addresses, rather than
2401 simply doing the normal subscript thing. That's because
2402 some of the above structs have sizes which are not
2403 a whole number of words. GCC rounds their sizes up to a
2404 whole number of words, which means that the address calcs
2405 arising from using normal C indexing or pointer arithmetic
2406 are just plain wrong. Sigh.
2409 myindex ( int scale, void* base, int index )
2412 ((UChar*)base) + scale * index;
2417 printName ( UChar* name, UChar* strtab )
2419 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
2420 UInt32 strtab_offset = * (UInt32*)(name+4);
2421 debugBelch("%s", strtab + strtab_offset );
2424 for (i = 0; i < 8; i++) {
2425 if (name[i] == 0) break;
2426 debugBelch("%c", name[i] );
2433 copyName ( UChar* name, UChar* strtab, UChar* dst, int dstSize )
2435 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
2436 UInt32 strtab_offset = * (UInt32*)(name+4);
2437 strncpy ( (char*)dst, (char*)strtab+strtab_offset, dstSize );
2443 if (name[i] == 0) break;
2453 cstring_from_COFF_symbol_name ( UChar* name, UChar* strtab )
2456 /* If the string is longer than 8 bytes, look in the
2457 string table for it -- this will be correctly zero terminated.
2459 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
2460 UInt32 strtab_offset = * (UInt32*)(name+4);
2461 return ((UChar*)strtab) + strtab_offset;
2463 /* Otherwise, if shorter than 8 bytes, return the original,
2464 which by defn is correctly terminated.
2466 if (name[7]==0) return name;
2467 /* The annoying case: 8 bytes. Copy into a temporary
2468 (XXX which is never freed ...)
2470 newstr = stgMallocBytes(9, "cstring_from_COFF_symbol_name");
2472 strncpy((char*)newstr,(char*)name,8);
2477 /* Getting the name of a section is mildly tricky, so we make a
2478 function for it. Sadly, in one case we have to copy the string
2479 (when it is exactly 8 bytes long there's no trailing '\0'), so for
2480 consistency we *always* copy the string; the caller must free it
2483 cstring_from_section_name (UChar* name, UChar* strtab)
2488 int strtab_offset = strtol((char*)name+1,NULL,10);
2489 int len = strlen(((char*)strtab) + strtab_offset);
2491 newstr = stgMallocBytes(len, "cstring_from_section_symbol_name");
2492 strcpy((char*)newstr, (char*)((UChar*)strtab) + strtab_offset);
2497 newstr = stgMallocBytes(9, "cstring_from_section_symbol_name");
2499 strncpy((char*)newstr,(char*)name,8);
2505 /* Just compares the short names (first 8 chars) */
2506 static COFF_section *
2507 findPEi386SectionCalled ( ObjectCode* oc, UChar* name )
2511 = (COFF_header*)(oc->image);
2512 COFF_section* sectab
2514 ((UChar*)(oc->image))
2515 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2517 for (i = 0; i < hdr->NumberOfSections; i++) {
2520 COFF_section* section_i
2522 myindex ( sizeof_COFF_section, sectab, i );
2523 n1 = (UChar*) &(section_i->Name);
2525 if (n1[0]==n2[0] && n1[1]==n2[1] && n1[2]==n2[2] &&
2526 n1[3]==n2[3] && n1[4]==n2[4] && n1[5]==n2[5] &&
2527 n1[6]==n2[6] && n1[7]==n2[7])
2536 zapTrailingAtSign ( UChar* sym )
2538 # define my_isdigit(c) ((c) >= '0' && (c) <= '9')
2540 if (sym[0] == 0) return;
2542 while (sym[i] != 0) i++;
2545 while (j > 0 && my_isdigit(sym[j])) j--;
2546 if (j > 0 && sym[j] == '@' && j != i) sym[j] = 0;
2551 lookupSymbolInDLLs ( UChar *lbl )
2556 for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next) {
2557 /* debugBelch("look in %s for %s\n", o_dll->name, lbl); */
2559 if (lbl[0] == '_') {
2560 /* HACK: if the name has an initial underscore, try stripping
2561 it off & look that up first. I've yet to verify whether there's
2562 a Rule that governs whether an initial '_' *should always* be
2563 stripped off when mapping from import lib name to the DLL name.
2565 sym = GetProcAddress(o_dll->instance, (char*)(lbl+1));
2567 /*debugBelch("found %s in %s\n", lbl+1,o_dll->name);*/
2571 sym = GetProcAddress(o_dll->instance, (char*)lbl);
2573 /*debugBelch("found %s in %s\n", lbl,o_dll->name);*/
2582 ocVerifyImage_PEi386 ( ObjectCode* oc )
2587 COFF_section* sectab;
2588 COFF_symbol* symtab;
2590 /* debugBelch("\nLOADING %s\n", oc->fileName); */
2591 hdr = (COFF_header*)(oc->image);
2592 sectab = (COFF_section*) (
2593 ((UChar*)(oc->image))
2594 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2596 symtab = (COFF_symbol*) (
2597 ((UChar*)(oc->image))
2598 + hdr->PointerToSymbolTable
2600 strtab = ((UChar*)symtab)
2601 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2603 if (hdr->Machine != 0x14c) {
2604 errorBelch("%s: Not x86 PEi386", oc->fileName);
2607 if (hdr->SizeOfOptionalHeader != 0) {
2608 errorBelch("%s: PEi386 with nonempty optional header", oc->fileName);
2611 if ( /* (hdr->Characteristics & MYIMAGE_FILE_RELOCS_STRIPPED) || */
2612 (hdr->Characteristics & MYIMAGE_FILE_EXECUTABLE_IMAGE) ||
2613 (hdr->Characteristics & MYIMAGE_FILE_DLL) ||
2614 (hdr->Characteristics & MYIMAGE_FILE_SYSTEM) ) {
2615 errorBelch("%s: Not a PEi386 object file", oc->fileName);
2618 if ( (hdr->Characteristics & MYIMAGE_FILE_BYTES_REVERSED_HI)
2619 /* || !(hdr->Characteristics & MYIMAGE_FILE_32BIT_MACHINE) */ ) {
2620 errorBelch("%s: Invalid PEi386 word size or endiannness: %d",
2622 (int)(hdr->Characteristics));
2625 /* If the string table size is way crazy, this might indicate that
2626 there are more than 64k relocations, despite claims to the
2627 contrary. Hence this test. */
2628 /* debugBelch("strtab size %d\n", * (UInt32*)strtab); */
2630 if ( (*(UInt32*)strtab) > 600000 ) {
2631 /* Note that 600k has no special significance other than being
2632 big enough to handle the almost-2MB-sized lumps that
2633 constitute HSwin32*.o. */
2634 debugBelch("PEi386 object has suspiciously large string table; > 64k relocs?");
2639 /* No further verification after this point; only debug printing. */
2641 IF_DEBUG(linker, i=1);
2642 if (i == 0) return 1;
2644 debugBelch( "sectab offset = %d\n", ((UChar*)sectab) - ((UChar*)hdr) );
2645 debugBelch( "symtab offset = %d\n", ((UChar*)symtab) - ((UChar*)hdr) );
2646 debugBelch( "strtab offset = %d\n", ((UChar*)strtab) - ((UChar*)hdr) );
2649 debugBelch( "Machine: 0x%x\n", (UInt32)(hdr->Machine) );
2650 debugBelch( "# sections: %d\n", (UInt32)(hdr->NumberOfSections) );
2651 debugBelch( "time/date: 0x%x\n", (UInt32)(hdr->TimeDateStamp) );
2652 debugBelch( "symtab offset: %d\n", (UInt32)(hdr->PointerToSymbolTable) );
2653 debugBelch( "# symbols: %d\n", (UInt32)(hdr->NumberOfSymbols) );
2654 debugBelch( "sz of opt hdr: %d\n", (UInt32)(hdr->SizeOfOptionalHeader) );
2655 debugBelch( "characteristics: 0x%x\n", (UInt32)(hdr->Characteristics) );
2657 /* Print the section table. */
2659 for (i = 0; i < hdr->NumberOfSections; i++) {
2661 COFF_section* sectab_i
2663 myindex ( sizeof_COFF_section, sectab, i );
2670 printName ( sectab_i->Name, strtab );
2680 sectab_i->VirtualSize,
2681 sectab_i->VirtualAddress,
2682 sectab_i->SizeOfRawData,
2683 sectab_i->PointerToRawData,
2684 sectab_i->NumberOfRelocations,
2685 sectab_i->PointerToRelocations,
2686 sectab_i->PointerToRawData
2688 reltab = (COFF_reloc*) (
2689 ((UChar*)(oc->image)) + sectab_i->PointerToRelocations
2692 if ( sectab_i->Characteristics & MYIMAGE_SCN_LNK_NRELOC_OVFL ) {
2693 /* If the relocation field (a short) has overflowed, the
2694 * real count can be found in the first reloc entry.
2696 * See Section 4.1 (last para) of the PE spec (rev6.0).
2698 COFF_reloc* rel = (COFF_reloc*)
2699 myindex ( sizeof_COFF_reloc, reltab, 0 );
2700 noRelocs = rel->VirtualAddress;
2703 noRelocs = sectab_i->NumberOfRelocations;
2707 for (; j < noRelocs; j++) {
2709 COFF_reloc* rel = (COFF_reloc*)
2710 myindex ( sizeof_COFF_reloc, reltab, j );
2712 " type 0x%-4x vaddr 0x%-8x name `",
2714 rel->VirtualAddress );
2715 sym = (COFF_symbol*)
2716 myindex ( sizeof_COFF_symbol, symtab, rel->SymbolTableIndex );
2717 /* Hmm..mysterious looking offset - what's it for? SOF */
2718 printName ( sym->Name, strtab -10 );
2725 debugBelch("string table has size 0x%x\n", * (UInt32*)strtab );
2726 debugBelch("---START of string table---\n");
2727 for (i = 4; i < *(Int32*)strtab; i++) {
2729 debugBelch("\n"); else
2730 debugBelch("%c", strtab[i] );
2732 debugBelch("--- END of string table---\n");
2737 COFF_symbol* symtab_i;
2738 if (i >= (Int32)(hdr->NumberOfSymbols)) break;
2739 symtab_i = (COFF_symbol*)
2740 myindex ( sizeof_COFF_symbol, symtab, i );
2746 printName ( symtab_i->Name, strtab );
2755 (Int32)(symtab_i->SectionNumber),
2756 (UInt32)symtab_i->Type,
2757 (UInt32)symtab_i->StorageClass,
2758 (UInt32)symtab_i->NumberOfAuxSymbols
2760 i += symtab_i->NumberOfAuxSymbols;
2770 ocGetNames_PEi386 ( ObjectCode* oc )
2773 COFF_section* sectab;
2774 COFF_symbol* symtab;
2781 hdr = (COFF_header*)(oc->image);
2782 sectab = (COFF_section*) (
2783 ((UChar*)(oc->image))
2784 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2786 symtab = (COFF_symbol*) (
2787 ((UChar*)(oc->image))
2788 + hdr->PointerToSymbolTable
2790 strtab = ((UChar*)(oc->image))
2791 + hdr->PointerToSymbolTable
2792 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2794 /* Allocate space for any (local, anonymous) .bss sections. */
2796 for (i = 0; i < hdr->NumberOfSections; i++) {
2799 COFF_section* sectab_i
2801 myindex ( sizeof_COFF_section, sectab, i );
2803 char *secname = cstring_from_section_name(sectab_i->Name, strtab);
2805 if (0 != strcmp(secname, ".bss")) {
2812 /* sof 10/05: the PE spec text isn't too clear regarding what
2813 * the SizeOfRawData field is supposed to hold for object
2814 * file sections containing just uninitialized data -- for executables,
2815 * it is supposed to be zero; unclear what it's supposed to be
2816 * for object files. However, VirtualSize is guaranteed to be
2817 * zero for object files, which definitely suggests that SizeOfRawData
2818 * will be non-zero (where else would the size of this .bss section be
2819 * stored?) Looking at the COFF_section info for incoming object files,
2820 * this certainly appears to be the case.
2822 * => I suspect we've been incorrectly handling .bss sections in (relocatable)
2823 * object files up until now. This turned out to bite us with ghc-6.4.1's use
2824 * of gcc-3.4.x, which has started to emit initially-zeroed-out local 'static'
2825 * variable decls into to the .bss section. (The specific function in Q which
2826 * triggered this is libraries/base/cbits/dirUtils.c:__hscore_getFolderPath())
2828 if (sectab_i->VirtualSize == 0 && sectab_i->SizeOfRawData == 0) continue;
2829 /* This is a non-empty .bss section. Allocate zeroed space for
2830 it, and set its PointerToRawData field such that oc->image +
2831 PointerToRawData == addr_of_zeroed_space. */
2832 bss_sz = sectab_i->VirtualSize;
2833 if ( bss_sz < sectab_i->SizeOfRawData) { bss_sz = sectab_i->SizeOfRawData; }
2834 zspace = stgCallocBytes(1, bss_sz, "ocGetNames_PEi386(anonymous bss)");
2835 sectab_i->PointerToRawData = ((UChar*)zspace) - ((UChar*)(oc->image));
2836 addProddableBlock(oc, zspace, bss_sz);
2837 /* debugBelch("BSS anon section at 0x%x\n", zspace); */
2840 /* Copy section information into the ObjectCode. */
2842 for (i = 0; i < hdr->NumberOfSections; i++) {
2848 = SECTIONKIND_OTHER;
2849 COFF_section* sectab_i
2851 myindex ( sizeof_COFF_section, sectab, i );
2853 char *secname = cstring_from_section_name(sectab_i->Name, strtab);
2855 IF_DEBUG(linker, debugBelch("section name = %s\n", secname ));
2858 /* I'm sure this is the Right Way to do it. However, the
2859 alternative of testing the sectab_i->Name field seems to
2860 work ok with Cygwin.
2862 if (sectab_i->Characteristics & MYIMAGE_SCN_CNT_CODE ||
2863 sectab_i->Characteristics & MYIMAGE_SCN_CNT_INITIALIZED_DATA)
2864 kind = SECTIONKIND_CODE_OR_RODATA;
2867 if (0==strcmp(".text",(char*)secname) ||
2868 0==strcmp(".rdata",(char*)secname)||
2869 0==strcmp(".rodata",(char*)secname))
2870 kind = SECTIONKIND_CODE_OR_RODATA;
2871 if (0==strcmp(".data",(char*)secname) ||
2872 0==strcmp(".bss",(char*)secname))
2873 kind = SECTIONKIND_RWDATA;
2875 ASSERT(sectab_i->SizeOfRawData == 0 || sectab_i->VirtualSize == 0);
2876 sz = sectab_i->SizeOfRawData;
2877 if (sz < sectab_i->VirtualSize) sz = sectab_i->VirtualSize;
2879 start = ((UChar*)(oc->image)) + sectab_i->PointerToRawData;
2880 end = start + sz - 1;
2882 if (kind == SECTIONKIND_OTHER
2883 /* Ignore sections called which contain stabs debugging
2885 && 0 != strcmp(".stab", (char*)secname)
2886 && 0 != strcmp(".stabstr", (char*)secname)
2887 /* ignore constructor section for now */
2888 && 0 != strcmp(".ctors", (char*)secname)
2889 /* ignore section generated from .ident */
2890 && 0!= strncmp(".debug", (char*)secname, 6)
2891 /* ignore unknown section that appeared in gcc 3.4.5(?) */
2892 && 0!= strcmp(".reloc", (char*)secname)
2893 && 0 != strcmp(".rdata$zzz", (char*)secname)
2895 errorBelch("Unknown PEi386 section name `%s' (while processing: %s)", secname, oc->fileName);
2900 if (kind != SECTIONKIND_OTHER && end >= start) {
2901 addSection(oc, kind, start, end);
2902 addProddableBlock(oc, start, end - start + 1);
2908 /* Copy exported symbols into the ObjectCode. */
2910 oc->n_symbols = hdr->NumberOfSymbols;
2911 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
2912 "ocGetNames_PEi386(oc->symbols)");
2913 /* Call me paranoid; I don't care. */
2914 for (i = 0; i < oc->n_symbols; i++)
2915 oc->symbols[i] = NULL;
2919 COFF_symbol* symtab_i;
2920 if (i >= (Int32)(hdr->NumberOfSymbols)) break;
2921 symtab_i = (COFF_symbol*)
2922 myindex ( sizeof_COFF_symbol, symtab, i );
2926 if (symtab_i->StorageClass == MYIMAGE_SYM_CLASS_EXTERNAL
2927 && symtab_i->SectionNumber != MYIMAGE_SYM_UNDEFINED) {
2928 /* This symbol is global and defined, viz, exported */
2929 /* for MYIMAGE_SYMCLASS_EXTERNAL
2930 && !MYIMAGE_SYM_UNDEFINED,
2931 the address of the symbol is:
2932 address of relevant section + offset in section
2934 COFF_section* sectabent
2935 = (COFF_section*) myindex ( sizeof_COFF_section,
2937 symtab_i->SectionNumber-1 );
2938 addr = ((UChar*)(oc->image))
2939 + (sectabent->PointerToRawData
2943 if (symtab_i->SectionNumber == MYIMAGE_SYM_UNDEFINED
2944 && symtab_i->Value > 0) {
2945 /* This symbol isn't in any section at all, ie, global bss.
2946 Allocate zeroed space for it. */
2947 addr = stgCallocBytes(1, symtab_i->Value,
2948 "ocGetNames_PEi386(non-anonymous bss)");
2949 addSection(oc, SECTIONKIND_RWDATA, addr,
2950 ((UChar*)addr) + symtab_i->Value - 1);
2951 addProddableBlock(oc, addr, symtab_i->Value);
2952 /* debugBelch("BSS section at 0x%x\n", addr); */
2955 if (addr != NULL ) {
2956 sname = cstring_from_COFF_symbol_name ( symtab_i->Name, strtab );
2957 /* debugBelch("addSymbol %p `%s \n", addr,sname); */
2958 IF_DEBUG(linker, debugBelch("addSymbol %p `%s'\n", addr,sname);)
2959 ASSERT(i >= 0 && i < oc->n_symbols);
2960 /* cstring_from_COFF_symbol_name always succeeds. */
2961 oc->symbols[i] = (char*)sname;
2962 ghciInsertStrHashTable(oc->fileName, symhash, (char*)sname, addr);
2966 "IGNORING symbol %d\n"
2970 printName ( symtab_i->Name, strtab );
2979 (Int32)(symtab_i->SectionNumber),
2980 (UInt32)symtab_i->Type,
2981 (UInt32)symtab_i->StorageClass,
2982 (UInt32)symtab_i->NumberOfAuxSymbols
2987 i += symtab_i->NumberOfAuxSymbols;
2996 ocResolve_PEi386 ( ObjectCode* oc )
2999 COFF_section* sectab;
3000 COFF_symbol* symtab;
3010 /* ToDo: should be variable-sized? But is at least safe in the
3011 sense of buffer-overrun-proof. */
3013 /* debugBelch("resolving for %s\n", oc->fileName); */
3015 hdr = (COFF_header*)(oc->image);
3016 sectab = (COFF_section*) (
3017 ((UChar*)(oc->image))
3018 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
3020 symtab = (COFF_symbol*) (
3021 ((UChar*)(oc->image))
3022 + hdr->PointerToSymbolTable
3024 strtab = ((UChar*)(oc->image))
3025 + hdr->PointerToSymbolTable
3026 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
3028 for (i = 0; i < hdr->NumberOfSections; i++) {
3029 COFF_section* sectab_i
3031 myindex ( sizeof_COFF_section, sectab, i );
3034 ((UChar*)(oc->image)) + sectab_i->PointerToRelocations
3037 char *secname = cstring_from_section_name(sectab_i->Name, strtab);
3039 /* Ignore sections called which contain stabs debugging
3041 if (0 == strcmp(".stab", (char*)secname)
3042 || 0 == strcmp(".stabstr", (char*)secname)
3043 || 0 == strcmp(".ctors", (char*)secname)
3044 || 0 == strncmp(".debug", (char*)secname, 6)
3045 || 0 == strcmp(".rdata$zzz", (char*)secname)) {
3052 if ( sectab_i->Characteristics & MYIMAGE_SCN_LNK_NRELOC_OVFL ) {
3053 /* If the relocation field (a short) has overflowed, the
3054 * real count can be found in the first reloc entry.
3056 * See Section 4.1 (last para) of the PE spec (rev6.0).
3058 * Nov2003 update: the GNU linker still doesn't correctly
3059 * handle the generation of relocatable object files with
3060 * overflown relocations. Hence the output to warn of potential
3063 COFF_reloc* rel = (COFF_reloc*)
3064 myindex ( sizeof_COFF_reloc, reltab, 0 );
3065 noRelocs = rel->VirtualAddress;
3067 /* 10/05: we now assume (and check for) a GNU ld that is capable
3068 * of handling object files with (>2^16) of relocs.
3071 debugBelch("WARNING: Overflown relocation field (# relocs found: %u)\n",
3076 noRelocs = sectab_i->NumberOfRelocations;
3081 for (; j < noRelocs; j++) {
3083 COFF_reloc* reltab_j
3085 myindex ( sizeof_COFF_reloc, reltab, j );
3087 /* the location to patch */
3089 ((UChar*)(oc->image))
3090 + (sectab_i->PointerToRawData
3091 + reltab_j->VirtualAddress
3092 - sectab_i->VirtualAddress )
3094 /* the existing contents of pP */
3096 /* the symbol to connect to */
3097 sym = (COFF_symbol*)
3098 myindex ( sizeof_COFF_symbol,
3099 symtab, reltab_j->SymbolTableIndex );
3102 "reloc sec %2d num %3d: type 0x%-4x "
3103 "vaddr 0x%-8x name `",
3105 (UInt32)reltab_j->Type,
3106 reltab_j->VirtualAddress );
3107 printName ( sym->Name, strtab );
3108 debugBelch("'\n" ));
3110 if (sym->StorageClass == MYIMAGE_SYM_CLASS_STATIC) {
3111 COFF_section* section_sym
3112 = findPEi386SectionCalled ( oc, sym->Name );
3114 errorBelch("%s: can't find section `%s'", oc->fileName, sym->Name);
3117 S = ((UInt32)(oc->image))
3118 + (section_sym->PointerToRawData
3121 copyName ( sym->Name, strtab, symbol, 1000-1 );
3122 S = (UInt32) lookupSymbol( (char*)symbol );
3123 if ((void*)S != NULL) goto foundit;
3124 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3128 checkProddableBlock(oc, pP);
3129 switch (reltab_j->Type) {
3130 case MYIMAGE_REL_I386_DIR32:
3133 case MYIMAGE_REL_I386_REL32:
3134 /* Tricky. We have to insert a displacement at
3135 pP which, when added to the PC for the _next_
3136 insn, gives the address of the target (S).
3137 Problem is to know the address of the next insn
3138 when we only know pP. We assume that this
3139 literal field is always the last in the insn,
3140 so that the address of the next insn is pP+4
3141 -- hence the constant 4.
3142 Also I don't know if A should be added, but so
3143 far it has always been zero.
3145 SOF 05/2005: 'A' (old contents of *pP) have been observed
3146 to contain values other than zero (the 'wx' object file
3147 that came with wxhaskell-0.9.4; dunno how it was compiled..).
3148 So, add displacement to old value instead of asserting
3149 A to be zero. Fixes wxhaskell-related crashes, and no other
3150 ill effects have been observed.
3152 Update: the reason why we're seeing these more elaborate
3153 relocations is due to a switch in how the NCG compiles SRTs
3154 and offsets to them from info tables. SRTs live in .(ro)data,
3155 while info tables live in .text, causing GAS to emit REL32/DISP32
3156 relocations with non-zero values. Adding the displacement is
3157 the right thing to do.
3159 *pP = S - ((UInt32)pP) - 4 + A;
3162 debugBelch("%s: unhandled PEi386 relocation type %d",
3163 oc->fileName, reltab_j->Type);
3170 IF_DEBUG(linker, debugBelch("completed %s", oc->fileName));
3174 #endif /* defined(OBJFORMAT_PEi386) */
3177 /* --------------------------------------------------------------------------
3179 * ------------------------------------------------------------------------*/
3181 #if defined(OBJFORMAT_ELF)
3186 #if defined(sparc_HOST_ARCH)
3187 # define ELF_TARGET_SPARC /* Used inside <elf.h> */
3188 #elif defined(i386_HOST_ARCH)
3189 # define ELF_TARGET_386 /* Used inside <elf.h> */
3190 #elif defined(x86_64_HOST_ARCH)
3191 # define ELF_TARGET_X64_64
3195 #if !defined(openbsd_HOST_OS)
3198 /* openbsd elf has things in different places, with diff names */
3199 # include <elf_abi.h>
3200 # include <machine/reloc.h>
3201 # define R_386_32 RELOC_32
3202 # define R_386_PC32 RELOC_PC32
3205 /* If elf.h doesn't define it */
3206 # ifndef R_X86_64_PC64
3207 # define R_X86_64_PC64 24
3211 * Define a set of types which can be used for both ELF32 and ELF64
3215 #define ELFCLASS ELFCLASS64
3216 #define Elf_Addr Elf64_Addr
3217 #define Elf_Word Elf64_Word
3218 #define Elf_Sword Elf64_Sword
3219 #define Elf_Ehdr Elf64_Ehdr
3220 #define Elf_Phdr Elf64_Phdr
3221 #define Elf_Shdr Elf64_Shdr
3222 #define Elf_Sym Elf64_Sym
3223 #define Elf_Rel Elf64_Rel
3224 #define Elf_Rela Elf64_Rela
3226 #define ELF_ST_TYPE ELF64_ST_TYPE
3229 #define ELF_ST_BIND ELF64_ST_BIND
3232 #define ELF_R_TYPE ELF64_R_TYPE
3235 #define ELF_R_SYM ELF64_R_SYM
3238 #define ELFCLASS ELFCLASS32
3239 #define Elf_Addr Elf32_Addr
3240 #define Elf_Word Elf32_Word
3241 #define Elf_Sword Elf32_Sword
3242 #define Elf_Ehdr Elf32_Ehdr
3243 #define Elf_Phdr Elf32_Phdr
3244 #define Elf_Shdr Elf32_Shdr
3245 #define Elf_Sym Elf32_Sym
3246 #define Elf_Rel Elf32_Rel
3247 #define Elf_Rela Elf32_Rela
3249 #define ELF_ST_TYPE ELF32_ST_TYPE
3252 #define ELF_ST_BIND ELF32_ST_BIND
3255 #define ELF_R_TYPE ELF32_R_TYPE
3258 #define ELF_R_SYM ELF32_R_SYM
3264 * Functions to allocate entries in dynamic sections. Currently we simply
3265 * preallocate a large number, and we don't check if a entry for the given
3266 * target already exists (a linear search is too slow). Ideally these
3267 * entries would be associated with symbols.
3270 /* These sizes sufficient to load HSbase + HShaskell98 + a few modules */
3271 #define GOT_SIZE 0x20000
3272 #define FUNCTION_TABLE_SIZE 0x10000
3273 #define PLT_SIZE 0x08000
3276 static Elf_Addr got[GOT_SIZE];
3277 static unsigned int gotIndex;
3278 static Elf_Addr gp_val = (Elf_Addr)got;
3281 allocateGOTEntry(Elf_Addr target)
3285 if (gotIndex >= GOT_SIZE)
3286 barf("Global offset table overflow");
3288 entry = &got[gotIndex++];
3290 return (Elf_Addr)entry;
3294 #ifdef ELF_FUNCTION_DESC
3300 static FunctionDesc functionTable[FUNCTION_TABLE_SIZE];
3301 static unsigned int functionTableIndex;
3304 allocateFunctionDesc(Elf_Addr target)
3306 FunctionDesc *entry;
3308 if (functionTableIndex >= FUNCTION_TABLE_SIZE)
3309 barf("Function table overflow");
3311 entry = &functionTable[functionTableIndex++];
3313 entry->gp = (Elf_Addr)gp_val;
3314 return (Elf_Addr)entry;
3318 copyFunctionDesc(Elf_Addr target)
3320 FunctionDesc *olddesc = (FunctionDesc *)target;
3321 FunctionDesc *newdesc;
3323 newdesc = (FunctionDesc *)allocateFunctionDesc(olddesc->ip);
3324 newdesc->gp = olddesc->gp;
3325 return (Elf_Addr)newdesc;
3332 unsigned char code[sizeof(plt_code)];
3336 allocatePLTEntry(Elf_Addr target, ObjectCode *oc)
3338 PLTEntry *plt = (PLTEntry *)oc->plt;
3341 if (oc->pltIndex >= PLT_SIZE)
3342 barf("Procedure table overflow");
3344 entry = &plt[oc->pltIndex++];
3345 memcpy(entry->code, plt_code, sizeof(entry->code));
3346 PLT_RELOC(entry->code, target);
3347 return (Elf_Addr)entry;
3353 return (PLT_SIZE * sizeof(PLTEntry));
3359 * Generic ELF functions
3363 findElfSection ( void* objImage, Elf_Word sh_type )
3365 char* ehdrC = (char*)objImage;
3366 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3367 Elf_Shdr* shdr = (Elf_Shdr*)(ehdrC + ehdr->e_shoff);
3368 char* sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
3372 for (i = 0; i < ehdr->e_shnum; i++) {
3373 if (shdr[i].sh_type == sh_type
3374 /* Ignore the section header's string table. */
3375 && i != ehdr->e_shstrndx
3376 /* Ignore string tables named .stabstr, as they contain
3378 && 0 != memcmp(".stabstr", sh_strtab + shdr[i].sh_name, 8)
3380 ptr = ehdrC + shdr[i].sh_offset;
3388 ocVerifyImage_ELF ( ObjectCode* oc )
3392 int i, j, nent, nstrtab, nsymtabs;
3396 char* ehdrC = (char*)(oc->image);
3397 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3399 if (ehdr->e_ident[EI_MAG0] != ELFMAG0 ||
3400 ehdr->e_ident[EI_MAG1] != ELFMAG1 ||
3401 ehdr->e_ident[EI_MAG2] != ELFMAG2 ||
3402 ehdr->e_ident[EI_MAG3] != ELFMAG3) {
3403 errorBelch("%s: not an ELF object", oc->fileName);
3407 if (ehdr->e_ident[EI_CLASS] != ELFCLASS) {
3408 errorBelch("%s: unsupported ELF format", oc->fileName);
3412 if (ehdr->e_ident[EI_DATA] == ELFDATA2LSB) {
3413 IF_DEBUG(linker,debugBelch( "Is little-endian\n" ));
3415 if (ehdr->e_ident[EI_DATA] == ELFDATA2MSB) {
3416 IF_DEBUG(linker,debugBelch( "Is big-endian\n" ));
3418 errorBelch("%s: unknown endiannness", oc->fileName);
3422 if (ehdr->e_type != ET_REL) {
3423 errorBelch("%s: not a relocatable object (.o) file", oc->fileName);
3426 IF_DEBUG(linker, debugBelch( "Is a relocatable object (.o) file\n" ));
3428 IF_DEBUG(linker,debugBelch( "Architecture is " ));
3429 switch (ehdr->e_machine) {
3430 case EM_386: IF_DEBUG(linker,debugBelch( "x86" )); break;
3431 #ifdef EM_SPARC32PLUS
3432 case EM_SPARC32PLUS:
3434 case EM_SPARC: IF_DEBUG(linker,debugBelch( "sparc" )); break;
3436 case EM_IA_64: IF_DEBUG(linker,debugBelch( "ia64" )); break;
3438 case EM_PPC: IF_DEBUG(linker,debugBelch( "powerpc32" )); break;
3440 case EM_X86_64: IF_DEBUG(linker,debugBelch( "x86_64" )); break;
3441 #elif defined(EM_AMD64)
3442 case EM_AMD64: IF_DEBUG(linker,debugBelch( "amd64" )); break;
3444 default: IF_DEBUG(linker,debugBelch( "unknown" ));
3445 errorBelch("%s: unknown architecture (e_machine == %d)"
3446 , oc->fileName, ehdr->e_machine);
3450 IF_DEBUG(linker,debugBelch(
3451 "\nSection header table: start %ld, n_entries %d, ent_size %d\n",
3452 (long)ehdr->e_shoff, ehdr->e_shnum, ehdr->e_shentsize ));
3454 ASSERT (ehdr->e_shentsize == sizeof(Elf_Shdr));
3456 shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
3458 if (ehdr->e_shstrndx == SHN_UNDEF) {
3459 errorBelch("%s: no section header string table", oc->fileName);
3462 IF_DEBUG(linker,debugBelch( "Section header string table is section %d\n",
3464 sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
3467 for (i = 0; i < ehdr->e_shnum; i++) {
3468 IF_DEBUG(linker,debugBelch("%2d: ", i ));
3469 IF_DEBUG(linker,debugBelch("type=%2d ", (int)shdr[i].sh_type ));
3470 IF_DEBUG(linker,debugBelch("size=%4d ", (int)shdr[i].sh_size ));
3471 IF_DEBUG(linker,debugBelch("offs=%4d ", (int)shdr[i].sh_offset ));
3472 IF_DEBUG(linker,debugBelch(" (%p .. %p) ",
3473 ehdrC + shdr[i].sh_offset,
3474 ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1));
3476 if (shdr[i].sh_type == SHT_REL) {
3477 IF_DEBUG(linker,debugBelch("Rel " ));
3478 } else if (shdr[i].sh_type == SHT_RELA) {
3479 IF_DEBUG(linker,debugBelch("RelA " ));
3481 IF_DEBUG(linker,debugBelch(" "));
3484 IF_DEBUG(linker,debugBelch("sname=%s\n", sh_strtab + shdr[i].sh_name ));
3488 IF_DEBUG(linker,debugBelch( "\nString tables" ));
3491 for (i = 0; i < ehdr->e_shnum; i++) {
3492 if (shdr[i].sh_type == SHT_STRTAB
3493 /* Ignore the section header's string table. */
3494 && i != ehdr->e_shstrndx
3495 /* Ignore string tables named .stabstr, as they contain
3497 && 0 != memcmp(".stabstr", sh_strtab + shdr[i].sh_name, 8)
3499 IF_DEBUG(linker,debugBelch(" section %d is a normal string table", i ));
3500 strtab = ehdrC + shdr[i].sh_offset;
3505 errorBelch("%s: no string tables, or too many", oc->fileName);
3510 IF_DEBUG(linker,debugBelch( "\nSymbol tables" ));
3511 for (i = 0; i < ehdr->e_shnum; i++) {
3512 if (shdr[i].sh_type != SHT_SYMTAB) continue;
3513 IF_DEBUG(linker,debugBelch( "section %d is a symbol table\n", i ));
3515 stab = (Elf_Sym*) (ehdrC + shdr[i].sh_offset);
3516 nent = shdr[i].sh_size / sizeof(Elf_Sym);
3517 IF_DEBUG(linker,debugBelch( " number of entries is apparently %d (%ld rem)\n",
3519 (long)shdr[i].sh_size % sizeof(Elf_Sym)
3521 if (0 != shdr[i].sh_size % sizeof(Elf_Sym)) {
3522 errorBelch("%s: non-integral number of symbol table entries", oc->fileName);
3525 for (j = 0; j < nent; j++) {
3526 IF_DEBUG(linker,debugBelch(" %2d ", j ));
3527 IF_DEBUG(linker,debugBelch(" sec=%-5d size=%-3d val=%5p ",
3528 (int)stab[j].st_shndx,
3529 (int)stab[j].st_size,
3530 (char*)stab[j].st_value ));
3532 IF_DEBUG(linker,debugBelch("type=" ));
3533 switch (ELF_ST_TYPE(stab[j].st_info)) {
3534 case STT_NOTYPE: IF_DEBUG(linker,debugBelch("notype " )); break;
3535 case STT_OBJECT: IF_DEBUG(linker,debugBelch("object " )); break;
3536 case STT_FUNC : IF_DEBUG(linker,debugBelch("func " )); break;
3537 case STT_SECTION: IF_DEBUG(linker,debugBelch("section" )); break;
3538 case STT_FILE: IF_DEBUG(linker,debugBelch("file " )); break;
3539 default: IF_DEBUG(linker,debugBelch("? " )); break;
3541 IF_DEBUG(linker,debugBelch(" " ));
3543 IF_DEBUG(linker,debugBelch("bind=" ));
3544 switch (ELF_ST_BIND(stab[j].st_info)) {
3545 case STB_LOCAL : IF_DEBUG(linker,debugBelch("local " )); break;
3546 case STB_GLOBAL: IF_DEBUG(linker,debugBelch("global" )); break;
3547 case STB_WEAK : IF_DEBUG(linker,debugBelch("weak " )); break;
3548 default: IF_DEBUG(linker,debugBelch("? " )); break;
3550 IF_DEBUG(linker,debugBelch(" " ));
3552 IF_DEBUG(linker,debugBelch("name=%s\n", strtab + stab[j].st_name ));
3556 if (nsymtabs == 0) {
3557 errorBelch("%s: didn't find any symbol tables", oc->fileName);
3564 static int getSectionKind_ELF( Elf_Shdr *hdr, int *is_bss )
3568 if (hdr->sh_type == SHT_PROGBITS
3569 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_EXECINSTR)) {
3570 /* .text-style section */
3571 return SECTIONKIND_CODE_OR_RODATA;
3574 if (hdr->sh_type == SHT_PROGBITS
3575 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_WRITE)) {
3576 /* .data-style section */
3577 return SECTIONKIND_RWDATA;
3580 if (hdr->sh_type == SHT_PROGBITS
3581 && (hdr->sh_flags & SHF_ALLOC) && !(hdr->sh_flags & SHF_WRITE)) {
3582 /* .rodata-style section */
3583 return SECTIONKIND_CODE_OR_RODATA;
3586 if (hdr->sh_type == SHT_NOBITS
3587 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_WRITE)) {
3588 /* .bss-style section */
3590 return SECTIONKIND_RWDATA;
3593 return SECTIONKIND_OTHER;
3598 ocGetNames_ELF ( ObjectCode* oc )
3603 char* ehdrC = (char*)(oc->image);
3604 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3605 char* strtab = findElfSection ( ehdrC, SHT_STRTAB );
3606 Elf_Shdr* shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
3608 ASSERT(symhash != NULL);
3611 errorBelch("%s: no strtab", oc->fileName);
3616 for (i = 0; i < ehdr->e_shnum; i++) {
3617 /* Figure out what kind of section it is. Logic derived from
3618 Figure 1.14 ("Special Sections") of the ELF document
3619 ("Portable Formats Specification, Version 1.1"). */
3621 SectionKind kind = getSectionKind_ELF(&shdr[i], &is_bss);
3623 if (is_bss && shdr[i].sh_size > 0) {
3624 /* This is a non-empty .bss section. Allocate zeroed space for
3625 it, and set its .sh_offset field such that
3626 ehdrC + .sh_offset == addr_of_zeroed_space. */
3627 char* zspace = stgCallocBytes(1, shdr[i].sh_size,
3628 "ocGetNames_ELF(BSS)");
3629 shdr[i].sh_offset = ((char*)zspace) - ((char*)ehdrC);
3631 debugBelch("BSS section at 0x%x, size %d\n",
3632 zspace, shdr[i].sh_size);
3636 /* fill in the section info */
3637 if (kind != SECTIONKIND_OTHER && shdr[i].sh_size > 0) {
3638 addProddableBlock(oc, ehdrC + shdr[i].sh_offset, shdr[i].sh_size);
3639 addSection(oc, kind, ehdrC + shdr[i].sh_offset,
3640 ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1);
3643 if (shdr[i].sh_type != SHT_SYMTAB) continue;
3645 /* copy stuff into this module's object symbol table */
3646 stab = (Elf_Sym*) (ehdrC + shdr[i].sh_offset);
3647 nent = shdr[i].sh_size / sizeof(Elf_Sym);
3649 oc->n_symbols = nent;
3650 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
3651 "ocGetNames_ELF(oc->symbols)");
3653 for (j = 0; j < nent; j++) {
3655 char isLocal = FALSE; /* avoids uninit-var warning */
3657 char* nm = strtab + stab[j].st_name;
3658 int secno = stab[j].st_shndx;
3660 /* Figure out if we want to add it; if so, set ad to its
3661 address. Otherwise leave ad == NULL. */
3663 if (secno == SHN_COMMON) {
3665 ad = stgCallocBytes(1, stab[j].st_size, "ocGetNames_ELF(COMMON)");
3667 debugBelch("COMMON symbol, size %d name %s\n",
3668 stab[j].st_size, nm);
3670 /* Pointless to do addProddableBlock() for this area,
3671 since the linker should never poke around in it. */
3674 if ( ( ELF_ST_BIND(stab[j].st_info)==STB_GLOBAL
3675 || ELF_ST_BIND(stab[j].st_info)==STB_LOCAL
3677 /* and not an undefined symbol */
3678 && stab[j].st_shndx != SHN_UNDEF
3679 /* and not in a "special section" */
3680 && stab[j].st_shndx < SHN_LORESERVE
3682 /* and it's a not a section or string table or anything silly */
3683 ( ELF_ST_TYPE(stab[j].st_info)==STT_FUNC ||
3684 ELF_ST_TYPE(stab[j].st_info)==STT_OBJECT ||
3685 ELF_ST_TYPE(stab[j].st_info)==STT_NOTYPE
3688 /* Section 0 is the undefined section, hence > and not >=. */
3689 ASSERT(secno > 0 && secno < ehdr->e_shnum);
3691 if (shdr[secno].sh_type == SHT_NOBITS) {
3692 debugBelch(" BSS symbol, size %d off %d name %s\n",
3693 stab[j].st_size, stab[j].st_value, nm);
3696 ad = ehdrC + shdr[ secno ].sh_offset + stab[j].st_value;
3697 if (ELF_ST_BIND(stab[j].st_info)==STB_LOCAL) {
3700 #ifdef ELF_FUNCTION_DESC
3701 /* dlsym() and the initialisation table both give us function
3702 * descriptors, so to be consistent we store function descriptors
3703 * in the symbol table */
3704 if (ELF_ST_TYPE(stab[j].st_info) == STT_FUNC)
3705 ad = (char *)allocateFunctionDesc((Elf_Addr)ad);
3707 IF_DEBUG(linker,debugBelch( "addOTabName(GLOB): %10p %s %s\n",
3708 ad, oc->fileName, nm ));
3713 /* And the decision is ... */
3717 oc->symbols[j] = nm;
3720 /* Ignore entirely. */
3722 ghciInsertStrHashTable(oc->fileName, symhash, nm, ad);
3726 IF_DEBUG(linker,debugBelch( "skipping `%s'\n",
3727 strtab + stab[j].st_name ));
3730 "skipping bind = %d, type = %d, shndx = %d `%s'\n",
3731 (int)ELF_ST_BIND(stab[j].st_info),
3732 (int)ELF_ST_TYPE(stab[j].st_info),
3733 (int)stab[j].st_shndx,
3734 strtab + stab[j].st_name
3737 oc->symbols[j] = NULL;
3746 /* Do ELF relocations which lack an explicit addend. All x86-linux
3747 relocations appear to be of this form. */
3749 do_Elf_Rel_relocations ( ObjectCode* oc, char* ehdrC,
3750 Elf_Shdr* shdr, int shnum,
3751 Elf_Sym* stab, char* strtab )
3756 Elf_Rel* rtab = (Elf_Rel*) (ehdrC + shdr[shnum].sh_offset);
3757 int nent = shdr[shnum].sh_size / sizeof(Elf_Rel);
3758 int target_shndx = shdr[shnum].sh_info;
3759 int symtab_shndx = shdr[shnum].sh_link;
3761 stab = (Elf_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
3762 targ = (Elf_Word*)(ehdrC + shdr[ target_shndx ].sh_offset);
3763 IF_DEBUG(linker,debugBelch( "relocations for section %d using symtab %d\n",
3764 target_shndx, symtab_shndx ));
3766 /* Skip sections that we're not interested in. */
3769 SectionKind kind = getSectionKind_ELF(&shdr[target_shndx], &is_bss);
3770 if (kind == SECTIONKIND_OTHER) {
3771 IF_DEBUG(linker,debugBelch( "skipping (target section not loaded)"));
3776 for (j = 0; j < nent; j++) {
3777 Elf_Addr offset = rtab[j].r_offset;
3778 Elf_Addr info = rtab[j].r_info;
3780 Elf_Addr P = ((Elf_Addr)targ) + offset;
3781 Elf_Word* pP = (Elf_Word*)P;
3786 StgStablePtr stablePtr;
3789 IF_DEBUG(linker,debugBelch( "Rel entry %3d is raw(%6p %6p)",
3790 j, (void*)offset, (void*)info ));
3792 IF_DEBUG(linker,debugBelch( " ZERO" ));
3795 Elf_Sym sym = stab[ELF_R_SYM(info)];
3796 /* First see if it is a local symbol. */
3797 if (ELF_ST_BIND(sym.st_info) == STB_LOCAL) {
3798 /* Yes, so we can get the address directly from the ELF symbol
3800 symbol = sym.st_name==0 ? "(noname)" : strtab+sym.st_name;
3802 (ehdrC + shdr[ sym.st_shndx ].sh_offset
3803 + stab[ELF_R_SYM(info)].st_value);
3806 symbol = strtab + sym.st_name;
3807 stablePtr = (StgStablePtr)lookupHashTable(stablehash, (StgWord)symbol);
3808 if (NULL == stablePtr) {
3809 /* No, so look up the name in our global table. */
3810 S_tmp = lookupSymbol( symbol );
3811 S = (Elf_Addr)S_tmp;
3813 stableVal = deRefStablePtr( stablePtr );
3815 S = (Elf_Addr)S_tmp;
3819 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3822 IF_DEBUG(linker,debugBelch( "`%s' resolves to %p\n", symbol, (void*)S ));
3825 IF_DEBUG(linker,debugBelch( "Reloc: P = %p S = %p A = %p\n",
3826 (void*)P, (void*)S, (void*)A ));
3827 checkProddableBlock ( oc, pP );
3831 switch (ELF_R_TYPE(info)) {
3832 # ifdef i386_HOST_ARCH
3833 case R_386_32: *pP = value; break;
3834 case R_386_PC32: *pP = value - P; break;
3837 errorBelch("%s: unhandled ELF relocation(Rel) type %lu\n",
3838 oc->fileName, (lnat)ELF_R_TYPE(info));
3846 /* Do ELF relocations for which explicit addends are supplied.
3847 sparc-solaris relocations appear to be of this form. */
3849 do_Elf_Rela_relocations ( ObjectCode* oc, char* ehdrC,
3850 Elf_Shdr* shdr, int shnum,
3851 Elf_Sym* stab, char* strtab )
3854 char *symbol = NULL;
3856 Elf_Rela* rtab = (Elf_Rela*) (ehdrC + shdr[shnum].sh_offset);
3857 int nent = shdr[shnum].sh_size / sizeof(Elf_Rela);
3858 int target_shndx = shdr[shnum].sh_info;
3859 int symtab_shndx = shdr[shnum].sh_link;
3861 stab = (Elf_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
3862 targ = (Elf_Addr) (ehdrC + shdr[ target_shndx ].sh_offset);
3863 IF_DEBUG(linker,debugBelch( "relocations for section %d using symtab %d\n",
3864 target_shndx, symtab_shndx ));
3866 for (j = 0; j < nent; j++) {
3867 #if defined(DEBUG) || defined(sparc_HOST_ARCH) || defined(ia64_HOST_ARCH) || defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
3868 /* This #ifdef only serves to avoid unused-var warnings. */
3869 Elf_Addr offset = rtab[j].r_offset;
3870 Elf_Addr P = targ + offset;
3872 Elf_Addr info = rtab[j].r_info;
3873 Elf_Addr A = rtab[j].r_addend;
3877 # if defined(sparc_HOST_ARCH)
3878 Elf_Word* pP = (Elf_Word*)P;
3880 # elif defined(powerpc_HOST_ARCH)
3884 IF_DEBUG(linker,debugBelch( "Rel entry %3d is raw(%6p %6p %6p) ",
3885 j, (void*)offset, (void*)info,
3888 IF_DEBUG(linker,debugBelch( " ZERO" ));
3891 Elf_Sym sym = stab[ELF_R_SYM(info)];
3892 /* First see if it is a local symbol. */
3893 if (ELF_ST_BIND(sym.st_info) == STB_LOCAL) {
3894 /* Yes, so we can get the address directly from the ELF symbol
3896 symbol = sym.st_name==0 ? "(noname)" : strtab+sym.st_name;
3898 (ehdrC + shdr[ sym.st_shndx ].sh_offset
3899 + stab[ELF_R_SYM(info)].st_value);
3900 #ifdef ELF_FUNCTION_DESC
3901 /* Make a function descriptor for this function */
3902 if (S && ELF_ST_TYPE(sym.st_info) == STT_FUNC) {
3903 S = allocateFunctionDesc(S + A);
3908 /* No, so look up the name in our global table. */
3909 symbol = strtab + sym.st_name;
3910 S_tmp = lookupSymbol( symbol );
3911 S = (Elf_Addr)S_tmp;
3913 #ifdef ELF_FUNCTION_DESC
3914 /* If a function, already a function descriptor - we would
3915 have to copy it to add an offset. */
3916 if (S && (ELF_ST_TYPE(sym.st_info) == STT_FUNC) && (A != 0))
3917 errorBelch("%s: function %s with addend %p", oc->fileName, symbol, (void *)A);
3921 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3924 IF_DEBUG(linker,debugBelch( "`%s' resolves to %p", symbol, (void*)S ));
3927 IF_DEBUG(linker,debugBelch("Reloc: P = %p S = %p A = %p\n",
3928 (void*)P, (void*)S, (void*)A ));
3929 /* checkProddableBlock ( oc, (void*)P ); */
3933 switch (ELF_R_TYPE(info)) {
3934 # if defined(sparc_HOST_ARCH)
3935 case R_SPARC_WDISP30:
3936 w1 = *pP & 0xC0000000;
3937 w2 = (Elf_Word)((value - P) >> 2);
3938 ASSERT((w2 & 0xC0000000) == 0);
3943 w1 = *pP & 0xFFC00000;
3944 w2 = (Elf_Word)(value >> 10);
3945 ASSERT((w2 & 0xFFC00000) == 0);
3951 w2 = (Elf_Word)(value & 0x3FF);
3952 ASSERT((w2 & ~0x3FF) == 0);
3957 /* According to the Sun documentation:
3959 This relocation type resembles R_SPARC_32, except it refers to an
3960 unaligned word. That is, the word to be relocated must be treated
3961 as four separate bytes with arbitrary alignment, not as a word
3962 aligned according to the architecture requirements.
3965 w2 = (Elf_Word)value;
3967 // SPARC doesn't do misaligned writes of 32 bit words,
3968 // so we have to do this one byte-at-a-time.
3969 char *pPc = (char*)pP;
3970 pPc[0] = (char) ((Elf_Word)(w2 & 0xff000000) >> 24);
3971 pPc[1] = (char) ((Elf_Word)(w2 & 0x00ff0000) >> 16);
3972 pPc[2] = (char) ((Elf_Word)(w2 & 0x0000ff00) >> 8);
3973 pPc[3] = (char) ((Elf_Word)(w2 & 0x000000ff));
3977 w2 = (Elf_Word)value;
3980 # elif defined(powerpc_HOST_ARCH)
3981 case R_PPC_ADDR16_LO:
3982 *(Elf32_Half*) P = value;
3985 case R_PPC_ADDR16_HI:
3986 *(Elf32_Half*) P = value >> 16;
3989 case R_PPC_ADDR16_HA:
3990 *(Elf32_Half*) P = (value + 0x8000) >> 16;
3994 *(Elf32_Word *) P = value;
3998 *(Elf32_Word *) P = value - P;
4004 if( delta << 6 >> 6 != delta )
4006 value = (Elf_Addr) (&makeSymbolExtra( oc, ELF_R_SYM(info), value )
4010 if( value == 0 || delta << 6 >> 6 != delta )
4012 barf( "Unable to make SymbolExtra for #%d",
4018 *(Elf_Word *) P = (*(Elf_Word *) P & 0xfc000003)
4019 | (delta & 0x3fffffc);
4023 #if x86_64_HOST_ARCH
4025 *(Elf64_Xword *)P = value;
4030 #if defined(ALWAYS_PIC)
4031 barf("R_X86_64_PC32 relocation, but ALWAYS_PIC.");
4033 StgInt64 off = value - P;
4034 if (off >= 0x7fffffffL || off < -0x80000000L) {
4035 #if X86_64_ELF_NONPIC_HACK
4036 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4038 off = pltAddress + A - P;
4040 barf("R_X86_64_PC32 relocation out of range: %s = %p\nRecompile %s with -fPIC.",
4041 symbol, off, oc->fileName );
4044 *(Elf64_Word *)P = (Elf64_Word)off;
4051 StgInt64 off = value - P;
4052 *(Elf64_Word *)P = (Elf64_Word)off;
4057 #if defined(ALWAYS_PIC)
4058 barf("R_X86_64_32 relocation, but ALWAYS_PIC.");
4060 if (value >= 0x7fffffffL) {
4061 #if X86_64_ELF_NONPIC_HACK
4062 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4064 value = pltAddress + A;
4066 barf("R_X86_64_32 relocation out of range: %s = %p\nRecompile %s with -fPIC.",
4067 symbol, value, oc->fileName );
4070 *(Elf64_Word *)P = (Elf64_Word)value;
4075 #if defined(ALWAYS_PIC)
4076 barf("R_X86_64_32S relocation, but ALWAYS_PIC.");
4078 if ((StgInt64)value > 0x7fffffffL || (StgInt64)value < -0x80000000L) {
4079 #if X86_64_ELF_NONPIC_HACK
4080 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4082 value = pltAddress + A;
4084 barf("R_X86_64_32S relocation out of range: %s = %p\nRecompile %s with -fPIC.",
4085 symbol, value, oc->fileName );
4088 *(Elf64_Sword *)P = (Elf64_Sword)value;
4092 case R_X86_64_GOTPCREL:
4094 StgInt64 gotAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)->addr;
4095 StgInt64 off = gotAddress + A - P;
4096 *(Elf64_Word *)P = (Elf64_Word)off;
4100 case R_X86_64_PLT32:
4102 #if defined(ALWAYS_PIC)
4103 barf("R_X86_64_PLT32 relocation, but ALWAYS_PIC.");
4105 StgInt64 off = value - P;
4106 if (off >= 0x7fffffffL || off < -0x80000000L) {
4107 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4109 off = pltAddress + A - P;
4111 *(Elf64_Word *)P = (Elf64_Word)off;
4118 errorBelch("%s: unhandled ELF relocation(RelA) type %lu\n",
4119 oc->fileName, (lnat)ELF_R_TYPE(info));
4128 ocResolve_ELF ( ObjectCode* oc )
4132 Elf_Sym* stab = NULL;
4133 char* ehdrC = (char*)(oc->image);
4134 Elf_Ehdr* ehdr = (Elf_Ehdr*) ehdrC;
4135 Elf_Shdr* shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
4137 /* first find "the" symbol table */
4138 stab = (Elf_Sym*) findElfSection ( ehdrC, SHT_SYMTAB );
4140 /* also go find the string table */
4141 strtab = findElfSection ( ehdrC, SHT_STRTAB );
4143 if (stab == NULL || strtab == NULL) {
4144 errorBelch("%s: can't find string or symbol table", oc->fileName);
4148 /* Process the relocation sections. */
4149 for (shnum = 0; shnum < ehdr->e_shnum; shnum++) {
4150 if (shdr[shnum].sh_type == SHT_REL) {
4151 ok = do_Elf_Rel_relocations ( oc, ehdrC, shdr,
4152 shnum, stab, strtab );
4156 if (shdr[shnum].sh_type == SHT_RELA) {
4157 ok = do_Elf_Rela_relocations ( oc, ehdrC, shdr,
4158 shnum, stab, strtab );
4163 #if defined(powerpc_HOST_ARCH)
4164 ocFlushInstructionCache( oc );
4171 * PowerPC & X86_64 ELF specifics
4174 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
4176 static int ocAllocateSymbolExtras_ELF( ObjectCode *oc )
4182 ehdr = (Elf_Ehdr *) oc->image;
4183 shdr = (Elf_Shdr *) ( ((char *)oc->image) + ehdr->e_shoff );
4185 for( i = 0; i < ehdr->e_shnum; i++ )
4186 if( shdr[i].sh_type == SHT_SYMTAB )
4189 if( i == ehdr->e_shnum )
4191 errorBelch( "This ELF file contains no symtab" );
4195 if( shdr[i].sh_entsize != sizeof( Elf_Sym ) )
4197 errorBelch( "The entry size (%d) of the symtab isn't %d\n",
4198 (int) shdr[i].sh_entsize, (int) sizeof( Elf_Sym ) );
4203 return ocAllocateSymbolExtras( oc, shdr[i].sh_size / sizeof( Elf_Sym ), 0 );
4206 #endif /* powerpc */
4210 /* --------------------------------------------------------------------------
4212 * ------------------------------------------------------------------------*/
4214 #if defined(OBJFORMAT_MACHO)
4217 Support for MachO linking on Darwin/MacOS X
4218 by Wolfgang Thaller (wolfgang.thaller@gmx.net)
4220 I hereby formally apologize for the hackish nature of this code.
4221 Things that need to be done:
4222 *) implement ocVerifyImage_MachO
4223 *) add still more sanity checks.
4226 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
4227 #define mach_header mach_header_64
4228 #define segment_command segment_command_64
4229 #define section section_64
4230 #define nlist nlist_64
4233 #ifdef powerpc_HOST_ARCH
4234 static int ocAllocateSymbolExtras_MachO(ObjectCode* oc)
4236 struct mach_header *header = (struct mach_header *) oc->image;
4237 struct load_command *lc = (struct load_command *) (header + 1);
4240 for( i = 0; i < header->ncmds; i++ )
4242 if( lc->cmd == LC_SYMTAB )
4244 // Find out the first and last undefined external
4245 // symbol, so we don't have to allocate too many
4247 struct symtab_command *symLC = (struct symtab_command *) lc;
4248 unsigned min = symLC->nsyms, max = 0;
4249 struct nlist *nlist =
4250 symLC ? (struct nlist*) ((char*) oc->image + symLC->symoff)
4252 for(i=0;i<symLC->nsyms;i++)
4254 if(nlist[i].n_type & N_STAB)
4256 else if(nlist[i].n_type & N_EXT)
4258 if((nlist[i].n_type & N_TYPE) == N_UNDF
4259 && (nlist[i].n_value == 0))
4269 return ocAllocateSymbolExtras(oc, max - min + 1, min);
4274 lc = (struct load_command *) ( ((char *)lc) + lc->cmdsize );
4276 return ocAllocateSymbolExtras(oc,0,0);
4279 #ifdef x86_64_HOST_ARCH
4280 static int ocAllocateSymbolExtras_MachO(ObjectCode* oc)
4282 struct mach_header *header = (struct mach_header *) oc->image;
4283 struct load_command *lc = (struct load_command *) (header + 1);
4286 for( i = 0; i < header->ncmds; i++ )
4288 if( lc->cmd == LC_SYMTAB )
4290 // Just allocate one entry for every symbol
4291 struct symtab_command *symLC = (struct symtab_command *) lc;
4293 return ocAllocateSymbolExtras(oc, symLC->nsyms, 0);
4296 lc = (struct load_command *) ( ((char *)lc) + lc->cmdsize );
4298 return ocAllocateSymbolExtras(oc,0,0);
4302 static int ocVerifyImage_MachO(ObjectCode* oc)
4304 char *image = (char*) oc->image;
4305 struct mach_header *header = (struct mach_header*) image;
4307 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
4308 if(header->magic != MH_MAGIC_64) {
4309 errorBelch("%s: Bad magic. Expected: %08x, got: %08x.\n",
4310 oc->fileName, MH_MAGIC_64, header->magic);
4314 if(header->magic != MH_MAGIC) {
4315 errorBelch("%s: Bad magic. Expected: %08x, got: %08x.\n",
4316 oc->fileName, MH_MAGIC, header->magic);
4320 // FIXME: do some more verifying here
4324 static int resolveImports(
4327 struct symtab_command *symLC,
4328 struct section *sect, // ptr to lazy or non-lazy symbol pointer section
4329 unsigned long *indirectSyms,
4330 struct nlist *nlist)
4333 size_t itemSize = 4;
4336 int isJumpTable = 0;
4337 if(!strcmp(sect->sectname,"__jump_table"))
4341 ASSERT(sect->reserved2 == itemSize);
4345 for(i=0; i*itemSize < sect->size;i++)
4347 // according to otool, reserved1 contains the first index into the indirect symbol table
4348 struct nlist *symbol = &nlist[indirectSyms[sect->reserved1+i]];
4349 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4352 if((symbol->n_type & N_TYPE) == N_UNDF
4353 && (symbol->n_type & N_EXT) && (symbol->n_value != 0))
4354 addr = (void*) (symbol->n_value);
4356 addr = lookupSymbol(nm);
4359 errorBelch("\n%s: unknown symbol `%s'", oc->fileName, nm);
4367 checkProddableBlock(oc,image + sect->offset + i*itemSize);
4368 *(image + sect->offset + i*itemSize) = 0xe9; // jmp
4369 *(unsigned*)(image + sect->offset + i*itemSize + 1)
4370 = (char*)addr - (image + sect->offset + i*itemSize + 5);
4375 checkProddableBlock(oc,((void**)(image + sect->offset)) + i);
4376 ((void**)(image + sect->offset))[i] = addr;
4383 static unsigned long relocateAddress(
4386 struct section* sections,
4387 unsigned long address)
4390 for(i = 0; i < nSections; i++)
4392 if(sections[i].addr <= address
4393 && address < sections[i].addr + sections[i].size)
4395 return (unsigned long)oc->image
4396 + sections[i].offset + address - sections[i].addr;
4399 barf("Invalid Mach-O file:"
4400 "Address out of bounds while relocating object file");
4404 static int relocateSection(
4407 struct symtab_command *symLC, struct nlist *nlist,
4408 int nSections, struct section* sections, struct section *sect)
4410 struct relocation_info *relocs;
4413 if(!strcmp(sect->sectname,"__la_symbol_ptr"))
4415 else if(!strcmp(sect->sectname,"__nl_symbol_ptr"))
4417 else if(!strcmp(sect->sectname,"__la_sym_ptr2"))
4419 else if(!strcmp(sect->sectname,"__la_sym_ptr3"))
4423 relocs = (struct relocation_info*) (image + sect->reloff);
4427 #ifdef x86_64_HOST_ARCH
4428 struct relocation_info *reloc = &relocs[i];
4430 char *thingPtr = image + sect->offset + reloc->r_address;
4432 /* We shouldn't need to initialise this, but gcc on OS X 64 bit
4433 complains that it may be used uninitialized if we don't */
4436 int type = reloc->r_type;
4438 checkProddableBlock(oc,thingPtr);
4439 switch(reloc->r_length)
4442 thing = *(uint8_t*)thingPtr;
4443 baseValue = (uint64_t)thingPtr + 1;
4446 thing = *(uint16_t*)thingPtr;
4447 baseValue = (uint64_t)thingPtr + 2;
4450 thing = *(uint32_t*)thingPtr;
4451 baseValue = (uint64_t)thingPtr + 4;
4454 thing = *(uint64_t*)thingPtr;
4455 baseValue = (uint64_t)thingPtr + 8;
4458 barf("Unknown size.");
4461 if(type == X86_64_RELOC_GOT
4462 || type == X86_64_RELOC_GOT_LOAD)
4464 ASSERT(reloc->r_extern);
4465 value = (uint64_t) &makeSymbolExtra(oc, reloc->r_symbolnum, value)->addr;
4467 type = X86_64_RELOC_SIGNED;
4469 else if(reloc->r_extern)
4471 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4472 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4473 if(symbol->n_value == 0)
4474 value = (uint64_t) lookupSymbol(nm);
4476 value = relocateAddress(oc, nSections, sections,
4481 value = sections[reloc->r_symbolnum-1].offset
4482 - sections[reloc->r_symbolnum-1].addr
4486 if(type == X86_64_RELOC_BRANCH)
4488 if((int32_t)(value - baseValue) != (int64_t)(value - baseValue))
4490 ASSERT(reloc->r_extern);
4491 value = (uint64_t) &makeSymbolExtra(oc, reloc->r_symbolnum, value)
4494 ASSERT((int32_t)(value - baseValue) == (int64_t)(value - baseValue));
4495 type = X86_64_RELOC_SIGNED;
4500 case X86_64_RELOC_UNSIGNED:
4501 ASSERT(!reloc->r_pcrel);
4504 case X86_64_RELOC_SIGNED:
4505 case X86_64_RELOC_SIGNED_1:
4506 case X86_64_RELOC_SIGNED_2:
4507 case X86_64_RELOC_SIGNED_4:
4508 ASSERT(reloc->r_pcrel);
4509 thing += value - baseValue;
4511 case X86_64_RELOC_SUBTRACTOR:
4512 ASSERT(!reloc->r_pcrel);
4516 barf("unkown relocation");
4519 switch(reloc->r_length)
4522 *(uint8_t*)thingPtr = thing;
4525 *(uint16_t*)thingPtr = thing;
4528 *(uint32_t*)thingPtr = thing;
4531 *(uint64_t*)thingPtr = thing;
4535 if(relocs[i].r_address & R_SCATTERED)
4537 struct scattered_relocation_info *scat =
4538 (struct scattered_relocation_info*) &relocs[i];
4542 if(scat->r_length == 2)
4544 unsigned long word = 0;
4545 unsigned long* wordPtr = (unsigned long*) (image + sect->offset + scat->r_address);
4546 checkProddableBlock(oc,wordPtr);
4548 // Note on relocation types:
4549 // i386 uses the GENERIC_RELOC_* types,
4550 // while ppc uses special PPC_RELOC_* types.
4551 // *_RELOC_VANILLA and *_RELOC_PAIR have the same value
4552 // in both cases, all others are different.
4553 // Therefore, we use GENERIC_RELOC_VANILLA
4554 // and GENERIC_RELOC_PAIR instead of the PPC variants,
4555 // and use #ifdefs for the other types.
4557 // Step 1: Figure out what the relocated value should be
4558 if(scat->r_type == GENERIC_RELOC_VANILLA)
4560 word = *wordPtr + (unsigned long) relocateAddress(
4567 #ifdef powerpc_HOST_ARCH
4568 else if(scat->r_type == PPC_RELOC_SECTDIFF
4569 || scat->r_type == PPC_RELOC_LO16_SECTDIFF
4570 || scat->r_type == PPC_RELOC_HI16_SECTDIFF
4571 || scat->r_type == PPC_RELOC_HA16_SECTDIFF
4572 || scat->r_type == PPC_RELOC_LOCAL_SECTDIFF)
4574 else if(scat->r_type == GENERIC_RELOC_SECTDIFF
4575 || scat->r_type == GENERIC_RELOC_LOCAL_SECTDIFF)
4578 struct scattered_relocation_info *pair =
4579 (struct scattered_relocation_info*) &relocs[i+1];
4581 if(!pair->r_scattered || pair->r_type != GENERIC_RELOC_PAIR)
4582 barf("Invalid Mach-O file: "
4583 "RELOC_*_SECTDIFF not followed by RELOC_PAIR");
4585 word = (unsigned long)
4586 (relocateAddress(oc, nSections, sections, scat->r_value)
4587 - relocateAddress(oc, nSections, sections, pair->r_value));
4590 #ifdef powerpc_HOST_ARCH
4591 else if(scat->r_type == PPC_RELOC_HI16
4592 || scat->r_type == PPC_RELOC_LO16
4593 || scat->r_type == PPC_RELOC_HA16
4594 || scat->r_type == PPC_RELOC_LO14)
4595 { // these are generated by label+offset things
4596 struct relocation_info *pair = &relocs[i+1];
4597 if((pair->r_address & R_SCATTERED) || pair->r_type != PPC_RELOC_PAIR)
4598 barf("Invalid Mach-O file: "
4599 "PPC_RELOC_* not followed by PPC_RELOC_PAIR");
4601 if(scat->r_type == PPC_RELOC_LO16)
4603 word = ((unsigned short*) wordPtr)[1];
4604 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4606 else if(scat->r_type == PPC_RELOC_LO14)
4608 barf("Unsupported Relocation: PPC_RELOC_LO14");
4609 word = ((unsigned short*) wordPtr)[1] & 0xFFFC;
4610 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4612 else if(scat->r_type == PPC_RELOC_HI16)
4614 word = ((unsigned short*) wordPtr)[1] << 16;
4615 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF);
4617 else if(scat->r_type == PPC_RELOC_HA16)
4619 word = ((unsigned short*) wordPtr)[1] << 16;
4620 word += ((short)relocs[i+1].r_address & (short)0xFFFF);
4624 word += (unsigned long) relocateAddress(oc, nSections, sections, scat->r_value)
4632 barf ("Don't know how to handle this Mach-O "
4633 "scattered relocation entry: "
4634 "object file %s; entry type %ld; "
4636 oc->fileName, scat->r_type, scat->r_address);
4640 #ifdef powerpc_HOST_ARCH
4641 if(scat->r_type == GENERIC_RELOC_VANILLA
4642 || scat->r_type == PPC_RELOC_SECTDIFF)
4644 if(scat->r_type == GENERIC_RELOC_VANILLA
4645 || scat->r_type == GENERIC_RELOC_SECTDIFF
4646 || scat->r_type == GENERIC_RELOC_LOCAL_SECTDIFF)
4651 #ifdef powerpc_HOST_ARCH
4652 else if(scat->r_type == PPC_RELOC_LO16_SECTDIFF || scat->r_type == PPC_RELOC_LO16)
4654 ((unsigned short*) wordPtr)[1] = word & 0xFFFF;
4656 else if(scat->r_type == PPC_RELOC_HI16_SECTDIFF || scat->r_type == PPC_RELOC_HI16)
4658 ((unsigned short*) wordPtr)[1] = (word >> 16) & 0xFFFF;
4660 else if(scat->r_type == PPC_RELOC_HA16_SECTDIFF || scat->r_type == PPC_RELOC_HA16)
4662 ((unsigned short*) wordPtr)[1] = ((word >> 16) & 0xFFFF)
4663 + ((word & (1<<15)) ? 1 : 0);
4669 barf("Can't handle Mach-O scattered relocation entry "
4670 "with this r_length tag: "
4671 "object file %s; entry type %ld; "
4672 "r_length tag %ld; address %#lx\n",
4673 oc->fileName, scat->r_type, scat->r_length,
4678 else /* scat->r_pcrel */
4680 barf("Don't know how to handle *PC-relative* Mach-O "
4681 "scattered relocation entry: "
4682 "object file %s; entry type %ld; address %#lx\n",
4683 oc->fileName, scat->r_type, scat->r_address);
4688 else /* !(relocs[i].r_address & R_SCATTERED) */
4690 struct relocation_info *reloc = &relocs[i];
4691 if(reloc->r_pcrel && !reloc->r_extern)
4694 if(reloc->r_length == 2)
4696 unsigned long word = 0;
4697 #ifdef powerpc_HOST_ARCH
4698 unsigned long jumpIsland = 0;
4699 long offsetToJumpIsland = 0xBADBAD42; // initialise to bad value
4700 // to avoid warning and to catch
4704 unsigned long* wordPtr = (unsigned long*) (image + sect->offset + reloc->r_address);
4705 checkProddableBlock(oc,wordPtr);
4707 if(reloc->r_type == GENERIC_RELOC_VANILLA)
4711 #ifdef powerpc_HOST_ARCH
4712 else if(reloc->r_type == PPC_RELOC_LO16)
4714 word = ((unsigned short*) wordPtr)[1];
4715 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4717 else if(reloc->r_type == PPC_RELOC_HI16)
4719 word = ((unsigned short*) wordPtr)[1] << 16;
4720 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF);
4722 else if(reloc->r_type == PPC_RELOC_HA16)
4724 word = ((unsigned short*) wordPtr)[1] << 16;
4725 word += ((short)relocs[i+1].r_address & (short)0xFFFF);
4727 else if(reloc->r_type == PPC_RELOC_BR24)
4730 word = (word & 0x03FFFFFC) | ((word & 0x02000000) ? 0xFC000000 : 0);
4735 barf("Can't handle this Mach-O relocation entry "
4737 "object file %s; entry type %ld; address %#lx\n",
4738 oc->fileName, reloc->r_type, reloc->r_address);
4742 if(!reloc->r_extern)
4745 sections[reloc->r_symbolnum-1].offset
4746 - sections[reloc->r_symbolnum-1].addr
4753 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4754 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4755 void *symbolAddress = lookupSymbol(nm);
4758 errorBelch("\nunknown symbol `%s'", nm);
4764 #ifdef powerpc_HOST_ARCH
4765 // In the .o file, this should be a relative jump to NULL
4766 // and we'll change it to a relative jump to the symbol
4767 ASSERT(word + reloc->r_address == 0);
4768 jumpIsland = (unsigned long)
4769 &makeSymbolExtra(oc,
4771 (unsigned long) symbolAddress)
4775 offsetToJumpIsland = word + jumpIsland
4776 - (((long)image) + sect->offset - sect->addr);
4779 word += (unsigned long) symbolAddress
4780 - (((long)image) + sect->offset - sect->addr);
4784 word += (unsigned long) symbolAddress;
4788 if(reloc->r_type == GENERIC_RELOC_VANILLA)
4793 #ifdef powerpc_HOST_ARCH
4794 else if(reloc->r_type == PPC_RELOC_LO16)
4796 ((unsigned short*) wordPtr)[1] = word & 0xFFFF;
4799 else if(reloc->r_type == PPC_RELOC_HI16)
4801 ((unsigned short*) wordPtr)[1] = (word >> 16) & 0xFFFF;
4804 else if(reloc->r_type == PPC_RELOC_HA16)
4806 ((unsigned short*) wordPtr)[1] = ((word >> 16) & 0xFFFF)
4807 + ((word & (1<<15)) ? 1 : 0);
4810 else if(reloc->r_type == PPC_RELOC_BR24)
4812 if((long)word > (long)0x01FFFFFF || (long)word < (long)0xFFE00000)
4814 // The branch offset is too large.
4815 // Therefore, we try to use a jump island.
4818 barf("unconditional relative branch out of range: "
4819 "no jump island available");
4822 word = offsetToJumpIsland;
4823 if((long)word > (long)0x01FFFFFF || (long)word < (long)0xFFE00000)
4824 barf("unconditional relative branch out of range: "
4825 "jump island out of range");
4827 *wordPtr = (*wordPtr & 0xFC000003) | (word & 0x03FFFFFC);
4834 barf("Can't handle Mach-O relocation entry (not scattered) "
4835 "with this r_length tag: "
4836 "object file %s; entry type %ld; "
4837 "r_length tag %ld; address %#lx\n",
4838 oc->fileName, reloc->r_type, reloc->r_length,
4848 static int ocGetNames_MachO(ObjectCode* oc)
4850 char *image = (char*) oc->image;
4851 struct mach_header *header = (struct mach_header*) image;
4852 struct load_command *lc = (struct load_command*) (image + sizeof(struct mach_header));
4853 unsigned i,curSymbol = 0;
4854 struct segment_command *segLC = NULL;
4855 struct section *sections;
4856 struct symtab_command *symLC = NULL;
4857 struct nlist *nlist;
4858 unsigned long commonSize = 0;
4859 char *commonStorage = NULL;
4860 unsigned long commonCounter;
4862 for(i=0;i<header->ncmds;i++)
4864 if(lc->cmd == LC_SEGMENT || lc->cmd == LC_SEGMENT_64)
4865 segLC = (struct segment_command*) lc;
4866 else if(lc->cmd == LC_SYMTAB)
4867 symLC = (struct symtab_command*) lc;
4868 lc = (struct load_command *) ( ((char*)lc) + lc->cmdsize );
4871 sections = (struct section*) (segLC+1);
4872 nlist = symLC ? (struct nlist*) (image + symLC->symoff)
4876 barf("ocGetNames_MachO: no segment load command");
4878 for(i=0;i<segLC->nsects;i++)
4880 if(sections[i].size == 0)
4883 if((sections[i].flags & SECTION_TYPE) == S_ZEROFILL)
4885 char * zeroFillArea = stgCallocBytes(1,sections[i].size,
4886 "ocGetNames_MachO(common symbols)");
4887 sections[i].offset = zeroFillArea - image;
4890 if(!strcmp(sections[i].sectname,"__text"))
4891 addSection(oc, SECTIONKIND_CODE_OR_RODATA,
4892 (void*) (image + sections[i].offset),
4893 (void*) (image + sections[i].offset + sections[i].size));
4894 else if(!strcmp(sections[i].sectname,"__const"))
4895 addSection(oc, SECTIONKIND_RWDATA,
4896 (void*) (image + sections[i].offset),
4897 (void*) (image + sections[i].offset + sections[i].size));
4898 else if(!strcmp(sections[i].sectname,"__data"))
4899 addSection(oc, SECTIONKIND_RWDATA,
4900 (void*) (image + sections[i].offset),
4901 (void*) (image + sections[i].offset + sections[i].size));
4902 else if(!strcmp(sections[i].sectname,"__bss")
4903 || !strcmp(sections[i].sectname,"__common"))
4904 addSection(oc, SECTIONKIND_RWDATA,
4905 (void*) (image + sections[i].offset),
4906 (void*) (image + sections[i].offset + sections[i].size));
4908 addProddableBlock(oc, (void*) (image + sections[i].offset),
4912 // count external symbols defined here
4916 for(i=0;i<symLC->nsyms;i++)
4918 if(nlist[i].n_type & N_STAB)
4920 else if(nlist[i].n_type & N_EXT)
4922 if((nlist[i].n_type & N_TYPE) == N_UNDF
4923 && (nlist[i].n_value != 0))
4925 commonSize += nlist[i].n_value;
4928 else if((nlist[i].n_type & N_TYPE) == N_SECT)
4933 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
4934 "ocGetNames_MachO(oc->symbols)");
4938 for(i=0;i<symLC->nsyms;i++)
4940 if(nlist[i].n_type & N_STAB)
4942 else if((nlist[i].n_type & N_TYPE) == N_SECT)
4944 if(nlist[i].n_type & N_EXT)
4946 char *nm = image + symLC->stroff + nlist[i].n_un.n_strx;
4947 if((nlist[i].n_desc & N_WEAK_DEF) && lookupSymbol(nm))
4948 ; // weak definition, and we already have a definition
4951 ghciInsertStrHashTable(oc->fileName, symhash, nm,
4953 + sections[nlist[i].n_sect-1].offset
4954 - sections[nlist[i].n_sect-1].addr
4955 + nlist[i].n_value);
4956 oc->symbols[curSymbol++] = nm;
4963 commonStorage = stgCallocBytes(1,commonSize,"ocGetNames_MachO(common symbols)");
4964 commonCounter = (unsigned long)commonStorage;
4967 for(i=0;i<symLC->nsyms;i++)
4969 if((nlist[i].n_type & N_TYPE) == N_UNDF
4970 && (nlist[i].n_type & N_EXT) && (nlist[i].n_value != 0))
4972 char *nm = image + symLC->stroff + nlist[i].n_un.n_strx;
4973 unsigned long sz = nlist[i].n_value;
4975 nlist[i].n_value = commonCounter;
4977 ghciInsertStrHashTable(oc->fileName, symhash, nm,
4978 (void*)commonCounter);
4979 oc->symbols[curSymbol++] = nm;
4981 commonCounter += sz;
4988 static int ocResolve_MachO(ObjectCode* oc)
4990 char *image = (char*) oc->image;
4991 struct mach_header *header = (struct mach_header*) image;
4992 struct load_command *lc = (struct load_command*) (image + sizeof(struct mach_header));
4994 struct segment_command *segLC = NULL;
4995 struct section *sections;
4996 struct symtab_command *symLC = NULL;
4997 struct dysymtab_command *dsymLC = NULL;
4998 struct nlist *nlist;
5000 for(i=0;i<header->ncmds;i++)
5002 if(lc->cmd == LC_SEGMENT || lc->cmd == LC_SEGMENT_64)
5003 segLC = (struct segment_command*) lc;
5004 else if(lc->cmd == LC_SYMTAB)
5005 symLC = (struct symtab_command*) lc;
5006 else if(lc->cmd == LC_DYSYMTAB)
5007 dsymLC = (struct dysymtab_command*) lc;
5008 lc = (struct load_command *) ( ((char*)lc) + lc->cmdsize );
5011 sections = (struct section*) (segLC+1);
5012 nlist = symLC ? (struct nlist*) (image + symLC->symoff)
5017 unsigned long *indirectSyms
5018 = (unsigned long*) (image + dsymLC->indirectsymoff);
5020 for(i=0;i<segLC->nsects;i++)
5022 if( !strcmp(sections[i].sectname,"__la_symbol_ptr")
5023 || !strcmp(sections[i].sectname,"__la_sym_ptr2")
5024 || !strcmp(sections[i].sectname,"__la_sym_ptr3"))
5026 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
5029 else if(!strcmp(sections[i].sectname,"__nl_symbol_ptr")
5030 || !strcmp(sections[i].sectname,"__pointers"))
5032 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
5035 else if(!strcmp(sections[i].sectname,"__jump_table"))
5037 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
5043 for(i=0;i<segLC->nsects;i++)
5045 if(!relocateSection(oc,image,symLC,nlist,segLC->nsects,sections,§ions[i]))
5049 #if defined (powerpc_HOST_ARCH)
5050 ocFlushInstructionCache( oc );
5056 #ifdef powerpc_HOST_ARCH
5058 * The Mach-O object format uses leading underscores. But not everywhere.
5059 * There is a small number of runtime support functions defined in
5060 * libcc_dynamic.a whose name does not have a leading underscore.
5061 * As a consequence, we can't get their address from C code.
5062 * We have to use inline assembler just to take the address of a function.
5066 extern void* symbolsWithoutUnderscore[];
5068 static void machoInitSymbolsWithoutUnderscore()
5070 void **p = symbolsWithoutUnderscore;
5071 __asm__ volatile(".globl _symbolsWithoutUnderscore\n.data\n_symbolsWithoutUnderscore:");
5073 #undef SymI_NeedsProto
5074 #define SymI_NeedsProto(x) \
5075 __asm__ volatile(".long " # x);
5077 RTS_MACHO_NOUNDERLINE_SYMBOLS
5079 __asm__ volatile(".text");
5081 #undef SymI_NeedsProto
5082 #define SymI_NeedsProto(x) \
5083 ghciInsertStrHashTable("(GHCi built-in symbols)", symhash, #x, *p++);
5085 RTS_MACHO_NOUNDERLINE_SYMBOLS
5087 #undef SymI_NeedsProto
5093 * Figure out by how much to shift the entire Mach-O file in memory
5094 * when loading so that its single segment ends up 16-byte-aligned
5096 static int machoGetMisalignment( FILE * f )
5098 struct mach_header header;
5101 fread(&header, sizeof(header), 1, f);
5104 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
5105 if(header.magic != MH_MAGIC_64) {
5106 errorBelch("Bad magic. Expected: %08x, got: %08x.\n",
5107 MH_MAGIC_64, header->magic);
5111 if(header.magic != MH_MAGIC) {
5112 errorBelch("Bad magic. Expected: %08x, got: %08x.\n",
5113 MH_MAGIC, header->magic);
5118 misalignment = (header.sizeofcmds + sizeof(header))
5121 return misalignment ? (16 - misalignment) : 0;