1 /* -----------------------------------------------------------------------------
3 * (c) The GHC Team, 2000-2004
7 * ---------------------------------------------------------------------------*/
10 #include "PosixSource.h"
13 /* Linux needs _GNU_SOURCE to get RTLD_DEFAULT from <dlfcn.h> and
14 MREMAP_MAYMOVE from <sys/mman.h>.
23 #include "sm/Storage.h"
26 #include "LinkerInternals.h"
29 #include "StgPrimFloat.h" // for __int_encodeFloat etc.
32 #if !defined(mingw32_HOST_OS)
33 #include "posix/Signals.h"
36 // get protos for is*()
39 #ifdef HAVE_SYS_TYPES_H
40 #include <sys/types.h>
48 #ifdef HAVE_SYS_STAT_H
52 #if defined(HAVE_DLFCN_H)
56 #if defined(cygwin32_HOST_OS)
61 #ifdef HAVE_SYS_TIME_H
65 #include <sys/fcntl.h>
66 #include <sys/termios.h>
67 #include <sys/utime.h>
68 #include <sys/utsname.h>
72 #if defined(linux_HOST_OS) || defined(freebsd_HOST_OS) || defined(dragonfly_HOST_OS) || defined(netbsd_HOST_OS) || defined(openbsd_HOST_OS) || defined(darwin_HOST_OS)
83 #if defined(linux_HOST_OS) || defined(solaris2_HOST_OS) || defined(freebsd_HOST_OS) || defined(dragonfly_HOST_OS) || defined(netbsd_HOST_OS) || defined(openbsd_HOST_OS)
84 # define OBJFORMAT_ELF
85 # include <regex.h> // regex is already used by dlopen() so this is OK
86 // to use here without requiring an additional lib
87 #elif defined(cygwin32_HOST_OS) || defined (mingw32_HOST_OS)
88 # define OBJFORMAT_PEi386
91 #elif defined(darwin_HOST_OS)
92 # define OBJFORMAT_MACHO
94 # include <mach-o/loader.h>
95 # include <mach-o/nlist.h>
96 # include <mach-o/reloc.h>
97 #if !defined(HAVE_DLFCN_H)
98 # include <mach-o/dyld.h>
100 #if defined(powerpc_HOST_ARCH)
101 # include <mach-o/ppc/reloc.h>
103 #if defined(x86_64_HOST_ARCH)
104 # include <mach-o/x86_64/reloc.h>
108 #if defined(x86_64_HOST_ARCH) && defined(darwin_HOST_OS)
112 /* Hash table mapping symbol names to Symbol */
113 static /*Str*/HashTable *symhash;
115 /* Hash table mapping symbol names to StgStablePtr */
116 static /*Str*/HashTable *stablehash;
118 /* List of currently loaded objects */
119 ObjectCode *objects = NULL; /* initially empty */
121 static HsInt loadOc( ObjectCode* oc );
122 static ObjectCode* mkOc( char *path, char *image, int imageSize,
123 char *archiveMemberName
125 #ifdef darwin_HOST_OS
131 #if defined(OBJFORMAT_ELF)
132 static int ocVerifyImage_ELF ( ObjectCode* oc );
133 static int ocGetNames_ELF ( ObjectCode* oc );
134 static int ocResolve_ELF ( ObjectCode* oc );
135 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
136 static int ocAllocateSymbolExtras_ELF ( ObjectCode* oc );
138 #elif defined(OBJFORMAT_PEi386)
139 static int ocVerifyImage_PEi386 ( ObjectCode* oc );
140 static int ocGetNames_PEi386 ( ObjectCode* oc );
141 static int ocResolve_PEi386 ( ObjectCode* oc );
142 static void *lookupSymbolInDLLs ( unsigned char *lbl );
143 static void zapTrailingAtSign ( unsigned char *sym );
144 #elif defined(OBJFORMAT_MACHO)
145 static int ocVerifyImage_MachO ( ObjectCode* oc );
146 static int ocGetNames_MachO ( ObjectCode* oc );
147 static int ocResolve_MachO ( ObjectCode* oc );
150 static int machoGetMisalignment( FILE * );
152 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
153 static int ocAllocateSymbolExtras_MachO ( ObjectCode* oc );
155 #ifdef powerpc_HOST_ARCH
156 static void machoInitSymbolsWithoutUnderscore( void );
160 /* on x86_64 we have a problem with relocating symbol references in
161 * code that was compiled without -fPIC. By default, the small memory
162 * model is used, which assumes that symbol references can fit in a
163 * 32-bit slot. The system dynamic linker makes this work for
164 * references to shared libraries by either (a) allocating a jump
165 * table slot for code references, or (b) moving the symbol at load
166 * time (and copying its contents, if necessary) for data references.
168 * We unfortunately can't tell whether symbol references are to code
169 * or data. So for now we assume they are code (the vast majority
170 * are), and allocate jump-table slots. Unfortunately this will
171 * SILENTLY generate crashing code for data references. This hack is
172 * enabled by X86_64_ELF_NONPIC_HACK.
174 * One workaround is to use shared Haskell libraries. This is
175 * coming. Another workaround is to keep the static libraries but
176 * compile them with -fPIC, because that will generate PIC references
177 * to data which can be relocated. The PIC code is still too green to
178 * do this systematically, though.
181 * See thread http://www.haskell.org/pipermail/cvs-ghc/2007-September/038458.html
183 * Naming Scheme for Symbol Macros
185 * SymI_*: symbol is internal to the RTS. It resides in an object
186 * file/library that is statically.
187 * SymE_*: symbol is external to the RTS library. It might be linked
190 * Sym*_HasProto : the symbol prototype is imported in an include file
191 * or defined explicitly
192 * Sym*_NeedsProto: the symbol is undefined and we add a dummy
193 * default proto extern void sym(void);
195 #define X86_64_ELF_NONPIC_HACK 1
197 /* Link objects into the lower 2Gb on x86_64. GHC assumes the
198 * small memory model on this architecture (see gcc docs,
201 * MAP_32BIT not available on OpenBSD/amd64
203 #if defined(x86_64_HOST_ARCH) && defined(MAP_32BIT)
204 #define TRY_MAP_32BIT MAP_32BIT
206 #define TRY_MAP_32BIT 0
210 * Due to the small memory model (see above), on x86_64 we have to map
211 * all our non-PIC object files into the low 2Gb of the address space
212 * (why 2Gb and not 4Gb? Because all addresses must be reachable
213 * using a 32-bit signed PC-relative offset). On Linux we can do this
214 * using the MAP_32BIT flag to mmap(), however on other OSs
215 * (e.g. *BSD, see #2063, and also on Linux inside Xen, see #2512), we
216 * can't do this. So on these systems, we have to pick a base address
217 * in the low 2Gb of the address space and try to allocate memory from
220 * We pick a default address based on the OS, but also make this
221 * configurable via an RTS flag (+RTS -xm)
223 #if !defined(ALWAYS_PIC) && defined(x86_64_HOST_ARCH)
225 #if defined(MAP_32BIT)
226 // Try to use MAP_32BIT
227 #define MMAP_32BIT_BASE_DEFAULT 0
230 #define MMAP_32BIT_BASE_DEFAULT 0x40000000
233 static void *mmap_32bit_base = (void *)MMAP_32BIT_BASE_DEFAULT;
236 /* MAP_ANONYMOUS is MAP_ANON on some systems, e.g. OpenBSD */
237 #if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
238 #define MAP_ANONYMOUS MAP_ANON
241 /* -----------------------------------------------------------------------------
242 * Built-in symbols from the RTS
245 typedef struct _RtsSymbolVal {
250 #define Maybe_Stable_Names SymI_HasProto(stg_mkWeakzh) \
251 SymI_HasProto(stg_mkWeakForeignEnvzh) \
252 SymI_HasProto(stg_makeStableNamezh) \
253 SymI_HasProto(stg_finalizzeWeakzh)
255 #if !defined (mingw32_HOST_OS)
256 #define RTS_POSIX_ONLY_SYMBOLS \
257 SymI_HasProto(__hscore_get_saved_termios) \
258 SymI_HasProto(__hscore_set_saved_termios) \
259 SymI_HasProto(shutdownHaskellAndSignal) \
260 SymI_HasProto(lockFile) \
261 SymI_HasProto(unlockFile) \
262 SymI_HasProto(signal_handlers) \
263 SymI_HasProto(stg_sig_install) \
264 SymI_NeedsProto(nocldstop)
267 #if defined (cygwin32_HOST_OS)
268 #define RTS_MINGW_ONLY_SYMBOLS /**/
269 /* Don't have the ability to read import libs / archives, so
270 * we have to stupidly list a lot of what libcygwin.a
273 #define RTS_CYGWIN_ONLY_SYMBOLS \
274 SymI_HasProto(regfree) \
275 SymI_HasProto(regexec) \
276 SymI_HasProto(regerror) \
277 SymI_HasProto(regcomp) \
278 SymI_HasProto(__errno) \
279 SymI_HasProto(access) \
280 SymI_HasProto(chmod) \
281 SymI_HasProto(chdir) \
282 SymI_HasProto(close) \
283 SymI_HasProto(creat) \
285 SymI_HasProto(dup2) \
286 SymI_HasProto(fstat) \
287 SymI_HasProto(fcntl) \
288 SymI_HasProto(getcwd) \
289 SymI_HasProto(getenv) \
290 SymI_HasProto(lseek) \
291 SymI_HasProto(open) \
292 SymI_HasProto(fpathconf) \
293 SymI_HasProto(pathconf) \
294 SymI_HasProto(stat) \
296 SymI_HasProto(tanh) \
297 SymI_HasProto(cosh) \
298 SymI_HasProto(sinh) \
299 SymI_HasProto(atan) \
300 SymI_HasProto(acos) \
301 SymI_HasProto(asin) \
307 SymI_HasProto(sqrt) \
308 SymI_HasProto(localtime_r) \
309 SymI_HasProto(gmtime_r) \
310 SymI_HasProto(mktime) \
311 SymI_NeedsProto(_imp___tzname) \
312 SymI_HasProto(gettimeofday) \
313 SymI_HasProto(timezone) \
314 SymI_HasProto(tcgetattr) \
315 SymI_HasProto(tcsetattr) \
316 SymI_HasProto(memcpy) \
317 SymI_HasProto(memmove) \
318 SymI_HasProto(realloc) \
319 SymI_HasProto(malloc) \
320 SymI_HasProto(free) \
321 SymI_HasProto(fork) \
322 SymI_HasProto(lstat) \
323 SymI_HasProto(isatty) \
324 SymI_HasProto(mkdir) \
325 SymI_HasProto(opendir) \
326 SymI_HasProto(readdir) \
327 SymI_HasProto(rewinddir) \
328 SymI_HasProto(closedir) \
329 SymI_HasProto(link) \
330 SymI_HasProto(mkfifo) \
331 SymI_HasProto(pipe) \
332 SymI_HasProto(read) \
333 SymI_HasProto(rename) \
334 SymI_HasProto(rmdir) \
335 SymI_HasProto(select) \
336 SymI_HasProto(system) \
337 SymI_HasProto(write) \
338 SymI_HasProto(strcmp) \
339 SymI_HasProto(strcpy) \
340 SymI_HasProto(strncpy) \
341 SymI_HasProto(strerror) \
342 SymI_HasProto(sigaddset) \
343 SymI_HasProto(sigemptyset) \
344 SymI_HasProto(sigprocmask) \
345 SymI_HasProto(umask) \
346 SymI_HasProto(uname) \
347 SymI_HasProto(unlink) \
348 SymI_HasProto(utime) \
349 SymI_HasProto(waitpid)
351 #elif !defined(mingw32_HOST_OS)
352 #define RTS_MINGW_ONLY_SYMBOLS /**/
353 #define RTS_CYGWIN_ONLY_SYMBOLS /**/
354 #else /* defined(mingw32_HOST_OS) */
355 #define RTS_POSIX_ONLY_SYMBOLS /**/
356 #define RTS_CYGWIN_ONLY_SYMBOLS /**/
358 #if HAVE_GETTIMEOFDAY
359 #define RTS_MINGW_GETTIMEOFDAY_SYM SymI_NeedsProto(gettimeofday)
361 #define RTS_MINGW_GETTIMEOFDAY_SYM /**/
364 #if HAVE___MINGW_VFPRINTF
365 #define RTS___MINGW_VFPRINTF_SYM SymI_HasProto(__mingw_vfprintf)
367 #define RTS___MINGW_VFPRINTF_SYM /**/
370 /* These are statically linked from the mingw libraries into the ghc
371 executable, so we have to employ this hack. */
372 #define RTS_MINGW_ONLY_SYMBOLS \
373 SymI_HasProto(stg_asyncReadzh) \
374 SymI_HasProto(stg_asyncWritezh) \
375 SymI_HasProto(stg_asyncDoProczh) \
376 SymI_HasProto(memset) \
377 SymI_HasProto(inet_ntoa) \
378 SymI_HasProto(inet_addr) \
379 SymI_HasProto(htonl) \
380 SymI_HasProto(recvfrom) \
381 SymI_HasProto(listen) \
382 SymI_HasProto(bind) \
383 SymI_HasProto(shutdown) \
384 SymI_HasProto(connect) \
385 SymI_HasProto(htons) \
386 SymI_HasProto(ntohs) \
387 SymI_HasProto(getservbyname) \
388 SymI_HasProto(getservbyport) \
389 SymI_HasProto(getprotobynumber) \
390 SymI_HasProto(getprotobyname) \
391 SymI_HasProto(gethostbyname) \
392 SymI_HasProto(gethostbyaddr) \
393 SymI_HasProto(gethostname) \
394 SymI_HasProto(strcpy) \
395 SymI_HasProto(strncpy) \
396 SymI_HasProto(abort) \
397 SymI_NeedsProto(_alloca) \
398 SymI_HasProto(isxdigit) \
399 SymI_HasProto(isupper) \
400 SymI_HasProto(ispunct) \
401 SymI_HasProto(islower) \
402 SymI_HasProto(isspace) \
403 SymI_HasProto(isprint) \
404 SymI_HasProto(isdigit) \
405 SymI_HasProto(iscntrl) \
406 SymI_HasProto(isalpha) \
407 SymI_HasProto(isalnum) \
408 SymI_HasProto(isascii) \
409 RTS___MINGW_VFPRINTF_SYM \
410 SymI_HasProto(strcmp) \
411 SymI_HasProto(memmove) \
412 SymI_HasProto(realloc) \
413 SymI_HasProto(malloc) \
415 SymI_HasProto(tanh) \
416 SymI_HasProto(cosh) \
417 SymI_HasProto(sinh) \
418 SymI_HasProto(atan) \
419 SymI_HasProto(acos) \
420 SymI_HasProto(asin) \
426 SymI_HasProto(sqrt) \
427 SymI_HasProto(powf) \
428 SymI_HasProto(tanhf) \
429 SymI_HasProto(coshf) \
430 SymI_HasProto(sinhf) \
431 SymI_HasProto(atanf) \
432 SymI_HasProto(acosf) \
433 SymI_HasProto(asinf) \
434 SymI_HasProto(tanf) \
435 SymI_HasProto(cosf) \
436 SymI_HasProto(sinf) \
437 SymI_HasProto(expf) \
438 SymI_HasProto(logf) \
439 SymI_HasProto(sqrtf) \
441 SymI_HasProto(erfc) \
442 SymI_HasProto(erff) \
443 SymI_HasProto(erfcf) \
444 SymI_HasProto(memcpy) \
445 SymI_HasProto(rts_InstallConsoleEvent) \
446 SymI_HasProto(rts_ConsoleHandlerDone) \
447 SymI_NeedsProto(mktime) \
448 SymI_NeedsProto(_imp___timezone) \
449 SymI_NeedsProto(_imp___tzname) \
450 SymI_NeedsProto(_imp__tzname) \
451 SymI_NeedsProto(_imp___iob) \
452 SymI_NeedsProto(_imp___osver) \
453 SymI_NeedsProto(localtime) \
454 SymI_NeedsProto(gmtime) \
455 SymI_NeedsProto(opendir) \
456 SymI_NeedsProto(readdir) \
457 SymI_NeedsProto(rewinddir) \
458 SymI_NeedsProto(_imp____mb_cur_max) \
459 SymI_NeedsProto(_imp___pctype) \
460 SymI_NeedsProto(__chkstk) \
461 RTS_MINGW_GETTIMEOFDAY_SYM \
462 SymI_NeedsProto(closedir)
466 #if defined(darwin_HOST_OS) && HAVE_PRINTF_LDBLSTUB
467 #define RTS_DARWIN_ONLY_SYMBOLS \
468 SymI_NeedsProto(asprintf$LDBLStub) \
469 SymI_NeedsProto(err$LDBLStub) \
470 SymI_NeedsProto(errc$LDBLStub) \
471 SymI_NeedsProto(errx$LDBLStub) \
472 SymI_NeedsProto(fprintf$LDBLStub) \
473 SymI_NeedsProto(fscanf$LDBLStub) \
474 SymI_NeedsProto(fwprintf$LDBLStub) \
475 SymI_NeedsProto(fwscanf$LDBLStub) \
476 SymI_NeedsProto(printf$LDBLStub) \
477 SymI_NeedsProto(scanf$LDBLStub) \
478 SymI_NeedsProto(snprintf$LDBLStub) \
479 SymI_NeedsProto(sprintf$LDBLStub) \
480 SymI_NeedsProto(sscanf$LDBLStub) \
481 SymI_NeedsProto(strtold$LDBLStub) \
482 SymI_NeedsProto(swprintf$LDBLStub) \
483 SymI_NeedsProto(swscanf$LDBLStub) \
484 SymI_NeedsProto(syslog$LDBLStub) \
485 SymI_NeedsProto(vasprintf$LDBLStub) \
486 SymI_NeedsProto(verr$LDBLStub) \
487 SymI_NeedsProto(verrc$LDBLStub) \
488 SymI_NeedsProto(verrx$LDBLStub) \
489 SymI_NeedsProto(vfprintf$LDBLStub) \
490 SymI_NeedsProto(vfscanf$LDBLStub) \
491 SymI_NeedsProto(vfwprintf$LDBLStub) \
492 SymI_NeedsProto(vfwscanf$LDBLStub) \
493 SymI_NeedsProto(vprintf$LDBLStub) \
494 SymI_NeedsProto(vscanf$LDBLStub) \
495 SymI_NeedsProto(vsnprintf$LDBLStub) \
496 SymI_NeedsProto(vsprintf$LDBLStub) \
497 SymI_NeedsProto(vsscanf$LDBLStub) \
498 SymI_NeedsProto(vswprintf$LDBLStub) \
499 SymI_NeedsProto(vswscanf$LDBLStub) \
500 SymI_NeedsProto(vsyslog$LDBLStub) \
501 SymI_NeedsProto(vwarn$LDBLStub) \
502 SymI_NeedsProto(vwarnc$LDBLStub) \
503 SymI_NeedsProto(vwarnx$LDBLStub) \
504 SymI_NeedsProto(vwprintf$LDBLStub) \
505 SymI_NeedsProto(vwscanf$LDBLStub) \
506 SymI_NeedsProto(warn$LDBLStub) \
507 SymI_NeedsProto(warnc$LDBLStub) \
508 SymI_NeedsProto(warnx$LDBLStub) \
509 SymI_NeedsProto(wcstold$LDBLStub) \
510 SymI_NeedsProto(wprintf$LDBLStub) \
511 SymI_NeedsProto(wscanf$LDBLStub)
513 #define RTS_DARWIN_ONLY_SYMBOLS
517 # define MAIN_CAP_SYM SymI_HasProto(MainCapability)
519 # define MAIN_CAP_SYM
522 #if !defined(mingw32_HOST_OS)
523 #define RTS_USER_SIGNALS_SYMBOLS \
524 SymI_HasProto(setIOManagerControlFd) \
525 SymI_HasProto(setIOManagerWakeupFd) \
526 SymI_HasProto(ioManagerWakeup) \
527 SymI_HasProto(blockUserSignals) \
528 SymI_HasProto(unblockUserSignals)
530 #define RTS_USER_SIGNALS_SYMBOLS \
531 SymI_HasProto(ioManagerWakeup) \
532 SymI_HasProto(sendIOManagerEvent) \
533 SymI_HasProto(readIOManagerEvent) \
534 SymI_HasProto(getIOManagerEvent) \
535 SymI_HasProto(console_handler)
538 #define RTS_LIBFFI_SYMBOLS \
539 SymE_NeedsProto(ffi_prep_cif) \
540 SymE_NeedsProto(ffi_call) \
541 SymE_NeedsProto(ffi_type_void) \
542 SymE_NeedsProto(ffi_type_float) \
543 SymE_NeedsProto(ffi_type_double) \
544 SymE_NeedsProto(ffi_type_sint64) \
545 SymE_NeedsProto(ffi_type_uint64) \
546 SymE_NeedsProto(ffi_type_sint32) \
547 SymE_NeedsProto(ffi_type_uint32) \
548 SymE_NeedsProto(ffi_type_sint16) \
549 SymE_NeedsProto(ffi_type_uint16) \
550 SymE_NeedsProto(ffi_type_sint8) \
551 SymE_NeedsProto(ffi_type_uint8) \
552 SymE_NeedsProto(ffi_type_pointer)
554 #ifdef TABLES_NEXT_TO_CODE
555 #define RTS_RET_SYMBOLS /* nothing */
557 #define RTS_RET_SYMBOLS \
558 SymI_HasProto(stg_enter_ret) \
559 SymI_HasProto(stg_gc_fun_ret) \
560 SymI_HasProto(stg_ap_v_ret) \
561 SymI_HasProto(stg_ap_f_ret) \
562 SymI_HasProto(stg_ap_d_ret) \
563 SymI_HasProto(stg_ap_l_ret) \
564 SymI_HasProto(stg_ap_n_ret) \
565 SymI_HasProto(stg_ap_p_ret) \
566 SymI_HasProto(stg_ap_pv_ret) \
567 SymI_HasProto(stg_ap_pp_ret) \
568 SymI_HasProto(stg_ap_ppv_ret) \
569 SymI_HasProto(stg_ap_ppp_ret) \
570 SymI_HasProto(stg_ap_pppv_ret) \
571 SymI_HasProto(stg_ap_pppp_ret) \
572 SymI_HasProto(stg_ap_ppppp_ret) \
573 SymI_HasProto(stg_ap_pppppp_ret)
576 /* Modules compiled with -ticky may mention ticky counters */
577 /* This list should marry up with the one in $(TOP)/includes/stg/Ticky.h */
578 #define RTS_TICKY_SYMBOLS \
579 SymI_NeedsProto(ticky_entry_ctrs) \
580 SymI_NeedsProto(top_ct) \
582 SymI_HasProto(ENT_VIA_NODE_ctr) \
583 SymI_HasProto(ENT_STATIC_THK_ctr) \
584 SymI_HasProto(ENT_DYN_THK_ctr) \
585 SymI_HasProto(ENT_STATIC_FUN_DIRECT_ctr) \
586 SymI_HasProto(ENT_DYN_FUN_DIRECT_ctr) \
587 SymI_HasProto(ENT_STATIC_CON_ctr) \
588 SymI_HasProto(ENT_DYN_CON_ctr) \
589 SymI_HasProto(ENT_STATIC_IND_ctr) \
590 SymI_HasProto(ENT_DYN_IND_ctr) \
591 SymI_HasProto(ENT_PERM_IND_ctr) \
592 SymI_HasProto(ENT_PAP_ctr) \
593 SymI_HasProto(ENT_AP_ctr) \
594 SymI_HasProto(ENT_AP_STACK_ctr) \
595 SymI_HasProto(ENT_BH_ctr) \
596 SymI_HasProto(UNKNOWN_CALL_ctr) \
597 SymI_HasProto(SLOW_CALL_v_ctr) \
598 SymI_HasProto(SLOW_CALL_f_ctr) \
599 SymI_HasProto(SLOW_CALL_d_ctr) \
600 SymI_HasProto(SLOW_CALL_l_ctr) \
601 SymI_HasProto(SLOW_CALL_n_ctr) \
602 SymI_HasProto(SLOW_CALL_p_ctr) \
603 SymI_HasProto(SLOW_CALL_pv_ctr) \
604 SymI_HasProto(SLOW_CALL_pp_ctr) \
605 SymI_HasProto(SLOW_CALL_ppv_ctr) \
606 SymI_HasProto(SLOW_CALL_ppp_ctr) \
607 SymI_HasProto(SLOW_CALL_pppv_ctr) \
608 SymI_HasProto(SLOW_CALL_pppp_ctr) \
609 SymI_HasProto(SLOW_CALL_ppppp_ctr) \
610 SymI_HasProto(SLOW_CALL_pppppp_ctr) \
611 SymI_HasProto(SLOW_CALL_OTHER_ctr) \
612 SymI_HasProto(ticky_slow_call_unevald) \
613 SymI_HasProto(SLOW_CALL_ctr) \
614 SymI_HasProto(MULTI_CHUNK_SLOW_CALL_ctr) \
615 SymI_HasProto(MULTI_CHUNK_SLOW_CALL_CHUNKS_ctr) \
616 SymI_HasProto(KNOWN_CALL_ctr) \
617 SymI_HasProto(KNOWN_CALL_TOO_FEW_ARGS_ctr) \
618 SymI_HasProto(KNOWN_CALL_EXTRA_ARGS_ctr) \
619 SymI_HasProto(SLOW_CALL_FUN_TOO_FEW_ctr) \
620 SymI_HasProto(SLOW_CALL_FUN_CORRECT_ctr) \
621 SymI_HasProto(SLOW_CALL_FUN_TOO_MANY_ctr) \
622 SymI_HasProto(SLOW_CALL_PAP_TOO_FEW_ctr) \
623 SymI_HasProto(SLOW_CALL_PAP_CORRECT_ctr) \
624 SymI_HasProto(SLOW_CALL_PAP_TOO_MANY_ctr) \
625 SymI_HasProto(SLOW_CALL_UNEVALD_ctr) \
626 SymI_HasProto(UPDF_OMITTED_ctr) \
627 SymI_HasProto(UPDF_PUSHED_ctr) \
628 SymI_HasProto(CATCHF_PUSHED_ctr) \
629 SymI_HasProto(UPDF_RCC_PUSHED_ctr) \
630 SymI_HasProto(UPDF_RCC_OMITTED_ctr) \
631 SymI_HasProto(UPD_SQUEEZED_ctr) \
632 SymI_HasProto(UPD_CON_IN_NEW_ctr) \
633 SymI_HasProto(UPD_CON_IN_PLACE_ctr) \
634 SymI_HasProto(UPD_PAP_IN_NEW_ctr) \
635 SymI_HasProto(UPD_PAP_IN_PLACE_ctr) \
636 SymI_HasProto(ALLOC_HEAP_ctr) \
637 SymI_HasProto(ALLOC_HEAP_tot) \
638 SymI_HasProto(ALLOC_FUN_ctr) \
639 SymI_HasProto(ALLOC_FUN_adm) \
640 SymI_HasProto(ALLOC_FUN_gds) \
641 SymI_HasProto(ALLOC_FUN_slp) \
642 SymI_HasProto(UPD_NEW_IND_ctr) \
643 SymI_HasProto(UPD_NEW_PERM_IND_ctr) \
644 SymI_HasProto(UPD_OLD_IND_ctr) \
645 SymI_HasProto(UPD_OLD_PERM_IND_ctr) \
646 SymI_HasProto(UPD_BH_UPDATABLE_ctr) \
647 SymI_HasProto(UPD_BH_SINGLE_ENTRY_ctr) \
648 SymI_HasProto(UPD_CAF_BH_UPDATABLE_ctr) \
649 SymI_HasProto(UPD_CAF_BH_SINGLE_ENTRY_ctr) \
650 SymI_HasProto(GC_SEL_ABANDONED_ctr) \
651 SymI_HasProto(GC_SEL_MINOR_ctr) \
652 SymI_HasProto(GC_SEL_MAJOR_ctr) \
653 SymI_HasProto(GC_FAILED_PROMOTION_ctr) \
654 SymI_HasProto(ALLOC_UP_THK_ctr) \
655 SymI_HasProto(ALLOC_SE_THK_ctr) \
656 SymI_HasProto(ALLOC_THK_adm) \
657 SymI_HasProto(ALLOC_THK_gds) \
658 SymI_HasProto(ALLOC_THK_slp) \
659 SymI_HasProto(ALLOC_CON_ctr) \
660 SymI_HasProto(ALLOC_CON_adm) \
661 SymI_HasProto(ALLOC_CON_gds) \
662 SymI_HasProto(ALLOC_CON_slp) \
663 SymI_HasProto(ALLOC_TUP_ctr) \
664 SymI_HasProto(ALLOC_TUP_adm) \
665 SymI_HasProto(ALLOC_TUP_gds) \
666 SymI_HasProto(ALLOC_TUP_slp) \
667 SymI_HasProto(ALLOC_BH_ctr) \
668 SymI_HasProto(ALLOC_BH_adm) \
669 SymI_HasProto(ALLOC_BH_gds) \
670 SymI_HasProto(ALLOC_BH_slp) \
671 SymI_HasProto(ALLOC_PRIM_ctr) \
672 SymI_HasProto(ALLOC_PRIM_adm) \
673 SymI_HasProto(ALLOC_PRIM_gds) \
674 SymI_HasProto(ALLOC_PRIM_slp) \
675 SymI_HasProto(ALLOC_PAP_ctr) \
676 SymI_HasProto(ALLOC_PAP_adm) \
677 SymI_HasProto(ALLOC_PAP_gds) \
678 SymI_HasProto(ALLOC_PAP_slp) \
679 SymI_HasProto(ALLOC_TSO_ctr) \
680 SymI_HasProto(ALLOC_TSO_adm) \
681 SymI_HasProto(ALLOC_TSO_gds) \
682 SymI_HasProto(ALLOC_TSO_slp) \
683 SymI_HasProto(RET_NEW_ctr) \
684 SymI_HasProto(RET_OLD_ctr) \
685 SymI_HasProto(RET_UNBOXED_TUP_ctr) \
686 SymI_HasProto(RET_SEMI_loads_avoided)
689 // On most platforms, the garbage collector rewrites references
690 // to small integer and char objects to a set of common, shared ones.
692 // We don't do this when compiling to Windows DLLs at the moment because
693 // it doesn't support cross package data references well.
695 #if defined(__PIC__) && defined(mingw32_HOST_OS)
696 #define RTS_INTCHAR_SYMBOLS
698 #define RTS_INTCHAR_SYMBOLS \
699 SymI_HasProto(stg_CHARLIKE_closure) \
700 SymI_HasProto(stg_INTLIKE_closure)
704 #define RTS_SYMBOLS \
707 SymI_HasProto(StgReturn) \
708 SymI_HasProto(stg_enter_info) \
709 SymI_HasProto(stg_gc_void_info) \
710 SymI_HasProto(__stg_gc_enter_1) \
711 SymI_HasProto(stg_gc_noregs) \
712 SymI_HasProto(stg_gc_unpt_r1_info) \
713 SymI_HasProto(stg_gc_unpt_r1) \
714 SymI_HasProto(stg_gc_unbx_r1_info) \
715 SymI_HasProto(stg_gc_unbx_r1) \
716 SymI_HasProto(stg_gc_f1_info) \
717 SymI_HasProto(stg_gc_f1) \
718 SymI_HasProto(stg_gc_d1_info) \
719 SymI_HasProto(stg_gc_d1) \
720 SymI_HasProto(stg_gc_l1_info) \
721 SymI_HasProto(stg_gc_l1) \
722 SymI_HasProto(__stg_gc_fun) \
723 SymI_HasProto(stg_gc_fun_info) \
724 SymI_HasProto(stg_gc_gen) \
725 SymI_HasProto(stg_gc_gen_info) \
726 SymI_HasProto(stg_gc_gen_hp) \
727 SymI_HasProto(stg_gc_ut) \
728 SymI_HasProto(stg_gen_yield) \
729 SymI_HasProto(stg_yield_noregs) \
730 SymI_HasProto(stg_yield_to_interpreter) \
731 SymI_HasProto(stg_gen_block) \
732 SymI_HasProto(stg_block_noregs) \
733 SymI_HasProto(stg_block_1) \
734 SymI_HasProto(stg_block_takemvar) \
735 SymI_HasProto(stg_block_putmvar) \
737 SymI_HasProto(MallocFailHook) \
738 SymI_HasProto(OnExitHook) \
739 SymI_HasProto(OutOfHeapHook) \
740 SymI_HasProto(StackOverflowHook) \
741 SymI_HasProto(addDLL) \
742 SymI_HasProto(__int_encodeDouble) \
743 SymI_HasProto(__word_encodeDouble) \
744 SymI_HasProto(__2Int_encodeDouble) \
745 SymI_HasProto(__int_encodeFloat) \
746 SymI_HasProto(__word_encodeFloat) \
747 SymI_HasProto(stg_atomicallyzh) \
748 SymI_HasProto(barf) \
749 SymI_HasProto(debugBelch) \
750 SymI_HasProto(errorBelch) \
751 SymI_HasProto(sysErrorBelch) \
752 SymI_HasProto(stg_getMaskingStatezh) \
753 SymI_HasProto(stg_maskAsyncExceptionszh) \
754 SymI_HasProto(stg_maskUninterruptiblezh) \
755 SymI_HasProto(stg_catchzh) \
756 SymI_HasProto(stg_catchRetryzh) \
757 SymI_HasProto(stg_catchSTMzh) \
758 SymI_HasProto(stg_checkzh) \
759 SymI_HasProto(closure_flags) \
760 SymI_HasProto(cmp_thread) \
761 SymI_HasProto(createAdjustor) \
762 SymI_HasProto(stg_decodeDoublezu2Intzh) \
763 SymI_HasProto(stg_decodeFloatzuIntzh) \
764 SymI_HasProto(defaultsHook) \
765 SymI_HasProto(stg_delayzh) \
766 SymI_HasProto(stg_deRefWeakzh) \
767 SymI_HasProto(stg_deRefStablePtrzh) \
768 SymI_HasProto(dirty_MUT_VAR) \
769 SymI_HasProto(stg_forkzh) \
770 SymI_HasProto(stg_forkOnzh) \
771 SymI_HasProto(forkProcess) \
772 SymI_HasProto(forkOS_createThread) \
773 SymI_HasProto(freeHaskellFunctionPtr) \
774 SymI_HasProto(getOrSetTypeableStore) \
775 SymI_HasProto(getOrSetGHCConcSignalSignalHandlerStore) \
776 SymI_HasProto(getOrSetGHCConcWindowsPendingDelaysStore) \
777 SymI_HasProto(getOrSetGHCConcWindowsIOManagerThreadStore) \
778 SymI_HasProto(getOrSetGHCConcWindowsProddingStore) \
779 SymI_HasProto(getOrSetSystemEventThreadEventManagerStore) \
780 SymI_HasProto(getOrSetSystemEventThreadIOManagerThreadStore) \
781 SymI_HasProto(genSymZh) \
782 SymI_HasProto(genericRaise) \
783 SymI_HasProto(getProgArgv) \
784 SymI_HasProto(getFullProgArgv) \
785 SymI_HasProto(getStablePtr) \
786 SymI_HasProto(hs_init) \
787 SymI_HasProto(hs_exit) \
788 SymI_HasProto(hs_set_argv) \
789 SymI_HasProto(hs_add_root) \
790 SymI_HasProto(hs_perform_gc) \
791 SymI_HasProto(hs_free_stable_ptr) \
792 SymI_HasProto(hs_free_fun_ptr) \
793 SymI_HasProto(hs_hpc_rootModule) \
794 SymI_HasProto(hs_hpc_module) \
795 SymI_HasProto(initLinker) \
796 SymI_HasProto(stg_unpackClosurezh) \
797 SymI_HasProto(stg_getApStackValzh) \
798 SymI_HasProto(stg_getSparkzh) \
799 SymI_HasProto(stg_numSparkszh) \
800 SymI_HasProto(stg_isCurrentThreadBoundzh) \
801 SymI_HasProto(stg_isEmptyMVarzh) \
802 SymI_HasProto(stg_killThreadzh) \
803 SymI_HasProto(loadArchive) \
804 SymI_HasProto(loadObj) \
805 SymI_HasProto(insertStableSymbol) \
806 SymI_HasProto(insertSymbol) \
807 SymI_HasProto(lookupSymbol) \
808 SymI_HasProto(stg_makeStablePtrzh) \
809 SymI_HasProto(stg_mkApUpd0zh) \
810 SymI_HasProto(stg_myThreadIdzh) \
811 SymI_HasProto(stg_labelThreadzh) \
812 SymI_HasProto(stg_newArrayzh) \
813 SymI_HasProto(stg_newBCOzh) \
814 SymI_HasProto(stg_newByteArrayzh) \
815 SymI_HasProto_redirect(newCAF, newDynCAF) \
816 SymI_HasProto(stg_newMVarzh) \
817 SymI_HasProto(stg_newMutVarzh) \
818 SymI_HasProto(stg_newTVarzh) \
819 SymI_HasProto(stg_noDuplicatezh) \
820 SymI_HasProto(stg_atomicModifyMutVarzh) \
821 SymI_HasProto(stg_newPinnedByteArrayzh) \
822 SymI_HasProto(stg_newAlignedPinnedByteArrayzh) \
823 SymI_HasProto(newSpark) \
824 SymI_HasProto(performGC) \
825 SymI_HasProto(performMajorGC) \
826 SymI_HasProto(prog_argc) \
827 SymI_HasProto(prog_argv) \
828 SymI_HasProto(stg_putMVarzh) \
829 SymI_HasProto(stg_raisezh) \
830 SymI_HasProto(stg_raiseIOzh) \
831 SymI_HasProto(stg_readTVarzh) \
832 SymI_HasProto(stg_readTVarIOzh) \
833 SymI_HasProto(resumeThread) \
834 SymI_HasProto(resolveObjs) \
835 SymI_HasProto(stg_retryzh) \
836 SymI_HasProto(rts_apply) \
837 SymI_HasProto(rts_checkSchedStatus) \
838 SymI_HasProto(rts_eval) \
839 SymI_HasProto(rts_evalIO) \
840 SymI_HasProto(rts_evalLazyIO) \
841 SymI_HasProto(rts_evalStableIO) \
842 SymI_HasProto(rts_eval_) \
843 SymI_HasProto(rts_getBool) \
844 SymI_HasProto(rts_getChar) \
845 SymI_HasProto(rts_getDouble) \
846 SymI_HasProto(rts_getFloat) \
847 SymI_HasProto(rts_getInt) \
848 SymI_HasProto(rts_getInt8) \
849 SymI_HasProto(rts_getInt16) \
850 SymI_HasProto(rts_getInt32) \
851 SymI_HasProto(rts_getInt64) \
852 SymI_HasProto(rts_getPtr) \
853 SymI_HasProto(rts_getFunPtr) \
854 SymI_HasProto(rts_getStablePtr) \
855 SymI_HasProto(rts_getThreadId) \
856 SymI_HasProto(rts_getWord) \
857 SymI_HasProto(rts_getWord8) \
858 SymI_HasProto(rts_getWord16) \
859 SymI_HasProto(rts_getWord32) \
860 SymI_HasProto(rts_getWord64) \
861 SymI_HasProto(rts_lock) \
862 SymI_HasProto(rts_mkBool) \
863 SymI_HasProto(rts_mkChar) \
864 SymI_HasProto(rts_mkDouble) \
865 SymI_HasProto(rts_mkFloat) \
866 SymI_HasProto(rts_mkInt) \
867 SymI_HasProto(rts_mkInt8) \
868 SymI_HasProto(rts_mkInt16) \
869 SymI_HasProto(rts_mkInt32) \
870 SymI_HasProto(rts_mkInt64) \
871 SymI_HasProto(rts_mkPtr) \
872 SymI_HasProto(rts_mkFunPtr) \
873 SymI_HasProto(rts_mkStablePtr) \
874 SymI_HasProto(rts_mkString) \
875 SymI_HasProto(rts_mkWord) \
876 SymI_HasProto(rts_mkWord8) \
877 SymI_HasProto(rts_mkWord16) \
878 SymI_HasProto(rts_mkWord32) \
879 SymI_HasProto(rts_mkWord64) \
880 SymI_HasProto(rts_unlock) \
881 SymI_HasProto(rts_unsafeGetMyCapability) \
882 SymI_HasProto(rtsSupportsBoundThreads) \
883 SymI_HasProto(rts_isProfiled) \
884 SymI_HasProto(setProgArgv) \
885 SymI_HasProto(startupHaskell) \
886 SymI_HasProto(shutdownHaskell) \
887 SymI_HasProto(shutdownHaskellAndExit) \
888 SymI_HasProto(stable_ptr_table) \
889 SymI_HasProto(stackOverflow) \
890 SymI_HasProto(stg_CAF_BLACKHOLE_info) \
891 SymI_HasProto(stg_BLACKHOLE_info) \
892 SymI_HasProto(__stg_EAGER_BLACKHOLE_info) \
893 SymI_HasProto(stg_BLOCKING_QUEUE_CLEAN_info) \
894 SymI_HasProto(stg_BLOCKING_QUEUE_DIRTY_info) \
895 SymI_HasProto(startTimer) \
896 SymI_HasProto(stg_MVAR_CLEAN_info) \
897 SymI_HasProto(stg_MVAR_DIRTY_info) \
898 SymI_HasProto(stg_IND_STATIC_info) \
899 SymI_HasProto(stg_ARR_WORDS_info) \
900 SymI_HasProto(stg_MUT_ARR_PTRS_DIRTY_info) \
901 SymI_HasProto(stg_MUT_ARR_PTRS_FROZEN_info) \
902 SymI_HasProto(stg_MUT_ARR_PTRS_FROZEN0_info) \
903 SymI_HasProto(stg_WEAK_info) \
904 SymI_HasProto(stg_ap_v_info) \
905 SymI_HasProto(stg_ap_f_info) \
906 SymI_HasProto(stg_ap_d_info) \
907 SymI_HasProto(stg_ap_l_info) \
908 SymI_HasProto(stg_ap_n_info) \
909 SymI_HasProto(stg_ap_p_info) \
910 SymI_HasProto(stg_ap_pv_info) \
911 SymI_HasProto(stg_ap_pp_info) \
912 SymI_HasProto(stg_ap_ppv_info) \
913 SymI_HasProto(stg_ap_ppp_info) \
914 SymI_HasProto(stg_ap_pppv_info) \
915 SymI_HasProto(stg_ap_pppp_info) \
916 SymI_HasProto(stg_ap_ppppp_info) \
917 SymI_HasProto(stg_ap_pppppp_info) \
918 SymI_HasProto(stg_ap_0_fast) \
919 SymI_HasProto(stg_ap_v_fast) \
920 SymI_HasProto(stg_ap_f_fast) \
921 SymI_HasProto(stg_ap_d_fast) \
922 SymI_HasProto(stg_ap_l_fast) \
923 SymI_HasProto(stg_ap_n_fast) \
924 SymI_HasProto(stg_ap_p_fast) \
925 SymI_HasProto(stg_ap_pv_fast) \
926 SymI_HasProto(stg_ap_pp_fast) \
927 SymI_HasProto(stg_ap_ppv_fast) \
928 SymI_HasProto(stg_ap_ppp_fast) \
929 SymI_HasProto(stg_ap_pppv_fast) \
930 SymI_HasProto(stg_ap_pppp_fast) \
931 SymI_HasProto(stg_ap_ppppp_fast) \
932 SymI_HasProto(stg_ap_pppppp_fast) \
933 SymI_HasProto(stg_ap_1_upd_info) \
934 SymI_HasProto(stg_ap_2_upd_info) \
935 SymI_HasProto(stg_ap_3_upd_info) \
936 SymI_HasProto(stg_ap_4_upd_info) \
937 SymI_HasProto(stg_ap_5_upd_info) \
938 SymI_HasProto(stg_ap_6_upd_info) \
939 SymI_HasProto(stg_ap_7_upd_info) \
940 SymI_HasProto(stg_exit) \
941 SymI_HasProto(stg_sel_0_upd_info) \
942 SymI_HasProto(stg_sel_10_upd_info) \
943 SymI_HasProto(stg_sel_11_upd_info) \
944 SymI_HasProto(stg_sel_12_upd_info) \
945 SymI_HasProto(stg_sel_13_upd_info) \
946 SymI_HasProto(stg_sel_14_upd_info) \
947 SymI_HasProto(stg_sel_15_upd_info) \
948 SymI_HasProto(stg_sel_1_upd_info) \
949 SymI_HasProto(stg_sel_2_upd_info) \
950 SymI_HasProto(stg_sel_3_upd_info) \
951 SymI_HasProto(stg_sel_4_upd_info) \
952 SymI_HasProto(stg_sel_5_upd_info) \
953 SymI_HasProto(stg_sel_6_upd_info) \
954 SymI_HasProto(stg_sel_7_upd_info) \
955 SymI_HasProto(stg_sel_8_upd_info) \
956 SymI_HasProto(stg_sel_9_upd_info) \
957 SymI_HasProto(stg_upd_frame_info) \
958 SymI_HasProto(stg_bh_upd_frame_info) \
959 SymI_HasProto(suspendThread) \
960 SymI_HasProto(stg_takeMVarzh) \
961 SymI_HasProto(stg_threadStatuszh) \
962 SymI_HasProto(stg_tryPutMVarzh) \
963 SymI_HasProto(stg_tryTakeMVarzh) \
964 SymI_HasProto(stg_unmaskAsyncExceptionszh) \
965 SymI_HasProto(unloadObj) \
966 SymI_HasProto(stg_unsafeThawArrayzh) \
967 SymI_HasProto(stg_waitReadzh) \
968 SymI_HasProto(stg_waitWritezh) \
969 SymI_HasProto(stg_writeTVarzh) \
970 SymI_HasProto(stg_yieldzh) \
971 SymI_NeedsProto(stg_interp_constr_entry) \
972 SymI_HasProto(stg_arg_bitmaps) \
973 SymI_HasProto(alloc_blocks_lim) \
975 SymI_HasProto(allocate) \
976 SymI_HasProto(allocateExec) \
977 SymI_HasProto(freeExec) \
978 SymI_HasProto(getAllocations) \
979 SymI_HasProto(revertCAFs) \
980 SymI_HasProto(RtsFlags) \
981 SymI_NeedsProto(rts_breakpoint_io_action) \
982 SymI_NeedsProto(rts_stop_next_breakpoint) \
983 SymI_NeedsProto(rts_stop_on_exception) \
984 SymI_HasProto(stopTimer) \
985 SymI_HasProto(n_capabilities) \
986 SymI_HasProto(stg_traceCcszh) \
987 SymI_HasProto(stg_traceEventzh) \
988 RTS_USER_SIGNALS_SYMBOLS \
992 // 64-bit support functions in libgcc.a
993 #if defined(__GNUC__) && SIZEOF_VOID_P <= 4
994 #define RTS_LIBGCC_SYMBOLS \
995 SymI_NeedsProto(__divdi3) \
996 SymI_NeedsProto(__udivdi3) \
997 SymI_NeedsProto(__moddi3) \
998 SymI_NeedsProto(__umoddi3) \
999 SymI_NeedsProto(__muldi3) \
1000 SymI_NeedsProto(__ashldi3) \
1001 SymI_NeedsProto(__ashrdi3) \
1002 SymI_NeedsProto(__lshrdi3)
1004 #define RTS_LIBGCC_SYMBOLS
1007 #if defined(darwin_HOST_OS) && defined(powerpc_HOST_ARCH)
1008 // Symbols that don't have a leading underscore
1009 // on Mac OS X. They have to receive special treatment,
1010 // see machoInitSymbolsWithoutUnderscore()
1011 #define RTS_MACHO_NOUNDERLINE_SYMBOLS \
1012 SymI_NeedsProto(saveFP) \
1013 SymI_NeedsProto(restFP)
1016 /* entirely bogus claims about types of these symbols */
1017 #define SymI_NeedsProto(vvv) extern void vvv(void);
1018 #if defined(__PIC__) && defined(mingw32_HOST_OS)
1019 #define SymE_HasProto(vvv) SymE_HasProto(vvv);
1020 #define SymE_NeedsProto(vvv) extern void _imp__ ## vvv (void);
1022 #define SymE_NeedsProto(vvv) SymI_NeedsProto(vvv);
1023 #define SymE_HasProto(vvv) SymI_HasProto(vvv)
1025 #define SymI_HasProto(vvv) /**/
1026 #define SymI_HasProto_redirect(vvv,xxx) /**/
1029 RTS_POSIX_ONLY_SYMBOLS
1030 RTS_MINGW_ONLY_SYMBOLS
1031 RTS_CYGWIN_ONLY_SYMBOLS
1032 RTS_DARWIN_ONLY_SYMBOLS
1035 #undef SymI_NeedsProto
1036 #undef SymI_HasProto
1037 #undef SymI_HasProto_redirect
1038 #undef SymE_HasProto
1039 #undef SymE_NeedsProto
1041 #ifdef LEADING_UNDERSCORE
1042 #define MAYBE_LEADING_UNDERSCORE_STR(s) ("_" s)
1044 #define MAYBE_LEADING_UNDERSCORE_STR(s) (s)
1047 #define SymI_HasProto(vvv) { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
1049 #define SymE_HasProto(vvv) { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
1050 (void*)DLL_IMPORT_DATA_REF(vvv) },
1052 #define SymI_NeedsProto(vvv) SymI_HasProto(vvv)
1053 #define SymE_NeedsProto(vvv) SymE_HasProto(vvv)
1055 // SymI_HasProto_redirect allows us to redirect references to one symbol to
1056 // another symbol. See newCAF/newDynCAF for an example.
1057 #define SymI_HasProto_redirect(vvv,xxx) \
1058 { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
1061 static RtsSymbolVal rtsSyms[] = {
1064 RTS_POSIX_ONLY_SYMBOLS
1065 RTS_MINGW_ONLY_SYMBOLS
1066 RTS_CYGWIN_ONLY_SYMBOLS
1067 RTS_DARWIN_ONLY_SYMBOLS
1070 #if defined(darwin_HOST_OS) && defined(i386_HOST_ARCH)
1071 // dyld stub code contains references to this,
1072 // but it should never be called because we treat
1073 // lazy pointers as nonlazy.
1074 { "dyld_stub_binding_helper", (void*)0xDEADBEEF },
1076 { 0, 0 } /* sentinel */
1081 /* -----------------------------------------------------------------------------
1082 * Insert symbols into hash tables, checking for duplicates.
1085 static void ghciInsertStrHashTable ( char* obj_name,
1091 if (lookupHashTable(table, (StgWord)key) == NULL)
1093 insertStrHashTable(table, (StgWord)key, data);
1098 "GHCi runtime linker: fatal error: I found a duplicate definition for symbol\n"
1100 "whilst processing object file\n"
1102 "This could be caused by:\n"
1103 " * Loading two different object files which export the same symbol\n"
1104 " * Specifying the same object file twice on the GHCi command line\n"
1105 " * An incorrect `package.conf' entry, causing some object to be\n"
1107 "GHCi cannot safely continue in this situation. Exiting now. Sorry.\n"
1114 /* -----------------------------------------------------------------------------
1115 * initialize the object linker
1119 static int linker_init_done = 0 ;
1121 #if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1122 static void *dl_prog_handle;
1123 static regex_t re_invalid;
1124 static regex_t re_realso;
1126 static Mutex dl_mutex; // mutex to protect dlopen/dlerror critical section
1134 #if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1138 /* Make initLinker idempotent, so we can call it
1139 before evey relevant operation; that means we
1140 don't need to initialise the linker separately */
1141 if (linker_init_done == 1) { return; } else {
1142 linker_init_done = 1;
1145 #if defined(THREADED_RTS) && (defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO))
1146 initMutex(&dl_mutex);
1148 stablehash = allocStrHashTable();
1149 symhash = allocStrHashTable();
1151 /* populate the symbol table with stuff from the RTS */
1152 for (sym = rtsSyms; sym->lbl != NULL; sym++) {
1153 ghciInsertStrHashTable("(GHCi built-in symbols)",
1154 symhash, sym->lbl, sym->addr);
1156 # if defined(OBJFORMAT_MACHO) && defined(powerpc_HOST_ARCH)
1157 machoInitSymbolsWithoutUnderscore();
1160 # if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1161 # if defined(RTLD_DEFAULT)
1162 dl_prog_handle = RTLD_DEFAULT;
1164 dl_prog_handle = dlopen(NULL, RTLD_LAZY);
1165 # endif /* RTLD_DEFAULT */
1167 compileResult = regcomp(&re_invalid,
1168 "(([^ \t()])+\\.so([^ \t:()])*):([ \t])*invalid ELF header",
1170 ASSERT( compileResult == 0 );
1171 compileResult = regcomp(&re_realso,
1172 "GROUP *\\( *(([^ )])+)",
1174 ASSERT( compileResult == 0 );
1177 #if !defined(ALWAYS_PIC) && defined(x86_64_HOST_ARCH)
1178 if (RtsFlags.MiscFlags.linkerMemBase != 0) {
1179 // User-override for mmap_32bit_base
1180 mmap_32bit_base = (void*)RtsFlags.MiscFlags.linkerMemBase;
1184 #if defined(mingw32_HOST_OS)
1186 * These two libraries cause problems when added to the static link,
1187 * but are necessary for resolving symbols in GHCi, hence we load
1188 * them manually here.
1196 exitLinker( void ) {
1197 #if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1198 if (linker_init_done == 1) {
1199 regfree(&re_invalid);
1200 regfree(&re_realso);
1202 closeMutex(&dl_mutex);
1208 /* -----------------------------------------------------------------------------
1209 * Loading DLL or .so dynamic libraries
1210 * -----------------------------------------------------------------------------
1212 * Add a DLL from which symbols may be found. In the ELF case, just
1213 * do RTLD_GLOBAL-style add, so no further messing around needs to
1214 * happen in order that symbols in the loaded .so are findable --
1215 * lookupSymbol() will subsequently see them by dlsym on the program's
1216 * dl-handle. Returns NULL if success, otherwise ptr to an err msg.
1218 * In the PEi386 case, open the DLLs and put handles to them in a
1219 * linked list. When looking for a symbol, try all handles in the
1220 * list. This means that we need to load even DLLs that are guaranteed
1221 * to be in the ghc.exe image already, just so we can get a handle
1222 * to give to loadSymbol, so that we can find the symbols. For such
1223 * libraries, the LoadLibrary call should be a no-op except for returning
1228 #if defined(OBJFORMAT_PEi386)
1229 /* A record for storing handles into DLLs. */
1234 struct _OpenedDLL* next;
1239 /* A list thereof. */
1240 static OpenedDLL* opened_dlls = NULL;
1243 # if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1246 internal_dlopen(const char *dll_name)
1252 // omitted: RTLD_NOW
1253 // see http://www.haskell.org/pipermail/cvs-ghc/2007-September/038570.html
1255 debugBelch("internal_dlopen: dll_name = '%s'\n", dll_name));
1257 //-------------- Begin critical section ------------------
1258 // This critical section is necessary because dlerror() is not
1259 // required to be reentrant (see POSIX -- IEEE Std 1003.1-2008)
1260 // Also, the error message returned must be copied to preserve it
1263 ACQUIRE_LOCK(&dl_mutex);
1264 hdl = dlopen(dll_name, RTLD_LAZY | RTLD_GLOBAL);
1268 /* dlopen failed; return a ptr to the error msg. */
1270 if (errmsg == NULL) errmsg = "addDLL: unknown error";
1271 errmsg_copy = stgMallocBytes(strlen(errmsg)+1, "addDLL");
1272 strcpy(errmsg_copy, errmsg);
1273 errmsg = errmsg_copy;
1275 RELEASE_LOCK(&dl_mutex);
1276 //--------------- End critical section -------------------
1283 addDLL( char *dll_name )
1285 # if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1286 /* ------------------- ELF DLL loader ------------------- */
1289 regmatch_t match[NMATCH];
1292 size_t match_length;
1293 #define MAXLINE 1000
1299 IF_DEBUG(linker, debugBelch("addDLL: dll_name = '%s'\n", dll_name));
1300 errmsg = internal_dlopen(dll_name);
1302 if (errmsg == NULL) {
1306 // GHC Trac ticket #2615
1307 // On some systems (e.g., Gentoo Linux) dynamic files (e.g. libc.so)
1308 // contain linker scripts rather than ELF-format object code. This
1309 // code handles the situation by recognizing the real object code
1310 // file name given in the linker script.
1312 // If an "invalid ELF header" error occurs, it is assumed that the
1313 // .so file contains a linker script instead of ELF object code.
1314 // In this case, the code looks for the GROUP ( ... ) linker
1315 // directive. If one is found, the first file name inside the
1316 // parentheses is treated as the name of a dynamic library and the
1317 // code attempts to dlopen that file. If this is also unsuccessful,
1318 // an error message is returned.
1320 // see if the error message is due to an invalid ELF header
1321 IF_DEBUG(linker, debugBelch("errmsg = '%s'\n", errmsg));
1322 result = regexec(&re_invalid, errmsg, (size_t) NMATCH, match, 0);
1323 IF_DEBUG(linker, debugBelch("result = %i\n", result));
1325 // success -- try to read the named file as a linker script
1326 match_length = (size_t) stg_min((match[1].rm_eo - match[1].rm_so),
1328 strncpy(line, (errmsg+(match[1].rm_so)),match_length);
1329 line[match_length] = '\0'; // make sure string is null-terminated
1330 IF_DEBUG(linker, debugBelch ("file name = '%s'\n", line));
1331 if ((fp = fopen(line, "r")) == NULL) {
1332 return errmsg; // return original error if open fails
1334 // try to find a GROUP ( ... ) command
1335 while (fgets(line, MAXLINE, fp) != NULL) {
1336 IF_DEBUG(linker, debugBelch("input line = %s", line));
1337 if (regexec(&re_realso, line, (size_t) NMATCH, match, 0) == 0) {
1338 // success -- try to dlopen the first named file
1339 IF_DEBUG(linker, debugBelch("match%s\n",""));
1340 line[match[1].rm_eo] = '\0';
1341 errmsg = internal_dlopen(line+match[1].rm_so);
1344 // if control reaches here, no GROUP ( ... ) directive was found
1345 // and the original error message is returned to the caller
1351 # elif defined(OBJFORMAT_PEi386)
1352 /* ------------------- Win32 DLL loader ------------------- */
1360 /* debugBelch("\naddDLL; dll_name = `%s'\n", dll_name); */
1362 /* See if we've already got it, and ignore if so. */
1363 for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next) {
1364 if (0 == strcmp(o_dll->name, dll_name))
1368 /* The file name has no suffix (yet) so that we can try
1369 both foo.dll and foo.drv
1371 The documentation for LoadLibrary says:
1372 If no file name extension is specified in the lpFileName
1373 parameter, the default library extension .dll is
1374 appended. However, the file name string can include a trailing
1375 point character (.) to indicate that the module name has no
1378 buf = stgMallocBytes(strlen(dll_name) + 10, "addDLL");
1379 sprintf(buf, "%s.DLL", dll_name);
1380 instance = LoadLibrary(buf);
1381 if (instance == NULL) {
1382 if (GetLastError() != ERROR_MOD_NOT_FOUND) goto error;
1383 // KAA: allow loading of drivers (like winspool.drv)
1384 sprintf(buf, "%s.DRV", dll_name);
1385 instance = LoadLibrary(buf);
1386 if (instance == NULL) {
1387 if (GetLastError() != ERROR_MOD_NOT_FOUND) goto error;
1388 // #1883: allow loading of unix-style libfoo.dll DLLs
1389 sprintf(buf, "lib%s.DLL", dll_name);
1390 instance = LoadLibrary(buf);
1391 if (instance == NULL) {
1398 /* Add this DLL to the list of DLLs in which to search for symbols. */
1399 o_dll = stgMallocBytes( sizeof(OpenedDLL), "addDLL" );
1400 o_dll->name = stgMallocBytes(1+strlen(dll_name), "addDLL");
1401 strcpy(o_dll->name, dll_name);
1402 o_dll->instance = instance;
1403 o_dll->next = opened_dlls;
1404 opened_dlls = o_dll;
1410 sysErrorBelch(dll_name);
1412 /* LoadLibrary failed; return a ptr to the error msg. */
1413 return "addDLL: could not load DLL";
1416 barf("addDLL: not implemented on this platform");
1420 /* -----------------------------------------------------------------------------
1421 * insert a stable symbol in the hash table
1425 insertStableSymbol(char* obj_name, char* key, StgPtr p)
1427 ghciInsertStrHashTable(obj_name, stablehash, key, getStablePtr(p));
1431 /* -----------------------------------------------------------------------------
1432 * insert a symbol in the hash table
1435 insertSymbol(char* obj_name, char* key, void* data)
1437 ghciInsertStrHashTable(obj_name, symhash, key, data);
1440 /* -----------------------------------------------------------------------------
1441 * lookup a symbol in the hash table
1444 lookupSymbol( char *lbl )
1448 ASSERT(symhash != NULL);
1449 val = lookupStrHashTable(symhash, lbl);
1452 # if defined(OBJFORMAT_ELF)
1453 return dlsym(dl_prog_handle, lbl);
1454 # elif defined(OBJFORMAT_MACHO)
1456 /* On OS X 10.3 and later, we use dlsym instead of the old legacy
1459 HACK: On OS X, global symbols are prefixed with an underscore.
1460 However, dlsym wants us to omit the leading underscore from the
1461 symbol name. For now, we simply strip it off here (and ONLY
1464 ASSERT(lbl[0] == '_');
1465 return dlsym(dl_prog_handle, lbl+1);
1467 if(NSIsSymbolNameDefined(lbl)) {
1468 NSSymbol symbol = NSLookupAndBindSymbol(lbl);
1469 return NSAddressOfSymbol(symbol);
1473 # endif /* HAVE_DLFCN_H */
1474 # elif defined(OBJFORMAT_PEi386)
1477 sym = lookupSymbolInDLLs((unsigned char*)lbl);
1478 if (sym != NULL) { return sym; };
1480 // Also try looking up the symbol without the @N suffix. Some
1481 // DLLs have the suffixes on their symbols, some don't.
1482 zapTrailingAtSign ( (unsigned char*)lbl );
1483 sym = lookupSymbolInDLLs((unsigned char*)lbl);
1484 if (sym != NULL) { return sym; };
1496 /* -----------------------------------------------------------------------------
1497 * Debugging aid: look in GHCi's object symbol tables for symbols
1498 * within DELTA bytes of the specified address, and show their names.
1501 void ghci_enquire ( char* addr );
1503 void ghci_enquire ( char* addr )
1508 const int DELTA = 64;
1513 for (oc = objects; oc; oc = oc->next) {
1514 for (i = 0; i < oc->n_symbols; i++) {
1515 sym = oc->symbols[i];
1516 if (sym == NULL) continue;
1519 a = lookupStrHashTable(symhash, sym);
1522 // debugBelch("ghci_enquire: can't find %s\n", sym);
1524 else if (addr-DELTA <= a && a <= addr+DELTA) {
1525 debugBelch("%p + %3d == `%s'\n", addr, (int)(a - addr), sym);
1533 #define ROUND_UP(x,size) ((x + size - 1) & ~(size - 1))
1536 mmapForLinker (size_t bytes, nat flags, int fd)
1538 void *map_addr = NULL;
1541 static nat fixed = 0;
1543 pagesize = getpagesize();
1544 size = ROUND_UP(bytes, pagesize);
1546 #if !defined(ALWAYS_PIC) && defined(x86_64_HOST_ARCH)
1549 if (mmap_32bit_base != 0) {
1550 map_addr = mmap_32bit_base;
1554 result = mmap(map_addr, size, PROT_EXEC|PROT_READ|PROT_WRITE,
1555 MAP_PRIVATE|TRY_MAP_32BIT|fixed|flags, fd, 0);
1557 if (result == MAP_FAILED) {
1558 sysErrorBelch("mmap %lu bytes at %p",(lnat)size,map_addr);
1559 errorBelch("Try specifying an address with +RTS -xm<addr> -RTS");
1560 stg_exit(EXIT_FAILURE);
1563 #if !defined(ALWAYS_PIC) && defined(x86_64_HOST_ARCH)
1564 if (mmap_32bit_base != 0) {
1565 if (result == map_addr) {
1566 mmap_32bit_base = (StgWord8*)map_addr + size;
1568 if ((W_)result > 0x80000000) {
1569 // oops, we were given memory over 2Gb
1570 #if defined(freebsd_HOST_OS) || defined(dragonfly_HOST_OS)
1571 // Some platforms require MAP_FIXED. This is normally
1572 // a bad idea, because MAP_FIXED will overwrite
1573 // existing mappings.
1574 munmap(result,size);
1578 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);
1581 // hmm, we were given memory somewhere else, but it's
1582 // still under 2Gb so we can use it. Next time, ask
1583 // for memory right after the place we just got some
1584 mmap_32bit_base = (StgWord8*)result + size;
1588 if ((W_)result > 0x80000000) {
1589 // oops, we were given memory over 2Gb
1590 // ... try allocating memory somewhere else?;
1591 debugTrace(DEBUG_linker,"MAP_32BIT didn't work; gave us %lu bytes at 0x%p", bytes, result);
1592 munmap(result, size);
1594 // Set a base address and try again... (guess: 1Gb)
1595 mmap_32bit_base = (void*)0x40000000;
1606 mkOc( char *path, char *image, int imageSize,
1607 char *archiveMemberName
1609 #ifdef darwin_HOST_OS
1616 oc = stgMallocBytes(sizeof(ObjectCode), "loadArchive(oc)");
1618 # if defined(OBJFORMAT_ELF)
1619 oc->formatName = "ELF";
1620 # elif defined(OBJFORMAT_PEi386)
1621 oc->formatName = "PEi386";
1622 # elif defined(OBJFORMAT_MACHO)
1623 oc->formatName = "Mach-O";
1626 barf("loadObj: not implemented on this platform");
1630 /* sigh, strdup() isn't a POSIX function, so do it the long way */
1631 oc->fileName = stgMallocBytes( strlen(path)+1, "loadObj" );
1632 strcpy(oc->fileName, path);
1634 if (archiveMemberName) {
1635 oc->archiveMemberName = stgMallocBytes( strlen(archiveMemberName)+1, "loadObj" );
1636 strcpy(oc->archiveMemberName, archiveMemberName);
1639 oc->archiveMemberName = NULL;
1642 oc->fileSize = imageSize;
1644 oc->sections = NULL;
1645 oc->proddables = NULL;
1648 #ifdef darwin_HOST_OS
1649 oc->misalignment = misalignment;
1653 /* chain it onto the list of objects */
1660 #if defined(USE_ARCHIVES_FOR_GHCI)
1662 loadArchive( char *path )
1669 size_t fileNameSize;
1675 IF_DEBUG(linker, debugBelch("loadArchive `%s'\n", path));
1678 file = stgMallocBytes(fileSize, "loadArchive(file)");
1680 f = fopen(path, "rb");
1682 barf("loadObj: can't read `%s'", path);
1684 n = fread ( tmp, 1, 8, f );
1685 if (strncmp(tmp, "!<arch>\n", 8) != 0)
1686 barf("loadArchive: Not an archive: `%s'", path);
1689 n = fread ( file, 1, 16, f );
1695 barf("loadArchive: Failed reading file name from `%s'", path);
1698 n = fread ( tmp, 1, 12, f );
1700 barf("loadArchive: Failed reading mod time from `%s'", path);
1701 n = fread ( tmp, 1, 6, f );
1703 barf("loadArchive: Failed reading owner from `%s'", path);
1704 n = fread ( tmp, 1, 6, f );
1706 barf("loadArchive: Failed reading group from `%s'", path);
1707 n = fread ( tmp, 1, 8, f );
1709 barf("loadArchive: Failed reading mode from `%s'", path);
1710 n = fread ( tmp, 1, 10, f );
1712 barf("loadArchive: Failed reading size from `%s'", path);
1714 for (n = 0; isdigit(tmp[n]); n++);
1716 imageSize = atoi(tmp);
1717 n = fread ( tmp, 1, 2, f );
1718 if (strncmp(tmp, "\x60\x0A", 2) != 0)
1719 barf("loadArchive: Failed reading magic from `%s' at %ld. Got %c%c", path, ftell(f), tmp[0], tmp[1]);
1721 /* Check for BSD-variant large filenames */
1722 if (0 == strncmp(file, "#1/", 3)) {
1724 for (n = 3; isdigit(file[n]); n++);
1726 fileNameSize = atoi(file + 3);
1727 imageSize -= fileNameSize;
1728 if (fileNameSize > fileSize) {
1729 /* Double it to avoid potentially continually
1730 increasing it by 1 */
1731 fileSize = fileNameSize * 2;
1732 file = stgReallocBytes(file, fileSize, "loadArchive(file)");
1734 n = fread ( file, 1, fileNameSize, f );
1735 if (n != (int)fileNameSize)
1736 barf("loadArchive: Failed reading filename from `%s'", path);
1743 for (n = 0; n < (int)fileNameSize - 1; n++) {
1744 if ((file[n] == '.') && (file[n + 1] == 'o')) {
1751 char *archiveMemberName;
1753 /* We can't mmap from the archive directly, as object
1754 files need to be 8-byte aligned but files in .ar
1755 archives are 2-byte aligned, and if we malloc the
1756 memory then we can be given memory above 2^32, so we
1757 mmap some anonymous memory and use that. We could
1759 image = mmapForLinker(imageSize, MAP_ANONYMOUS, -1);
1760 n = fread ( image, 1, imageSize, f );
1762 barf("loadObj: error whilst reading `%s'", path);
1764 archiveMemberName = stgMallocBytes(strlen(path) + fileNameSize + 3, "loadArchive(file)");
1765 sprintf(archiveMemberName, "%s(%.*s)", path, (int)fileNameSize, file);
1767 oc = mkOc(path, image, imageSize, archiveMemberName
1769 #ifdef darwin_HOST_OS
1775 stgFree(archiveMemberName);
1777 if (0 == loadOc(oc)) {
1783 n = fseek(f, imageSize, SEEK_CUR);
1785 barf("loadArchive: error whilst seeking by %d in `%s'",
1788 /* .ar files are 2-byte aligned */
1789 if (imageSize % 2) {
1790 n = fread ( tmp, 1, 1, f );
1796 barf("loadArchive: Failed reading padding from `%s'", path);
1808 HsInt GNU_ATTRIBUTE(__noreturn__)
1809 loadArchive( char *path STG_UNUSED ) {
1810 barf("loadArchive: not enabled");
1814 /* -----------------------------------------------------------------------------
1815 * Load an obj (populate the global symbol table, but don't resolve yet)
1817 * Returns: 1 if ok, 0 on error.
1820 loadObj( char *path )
1832 IF_DEBUG(linker, debugBelch("loadObj %s\n", path));
1836 /* debugBelch("loadObj %s\n", path ); */
1838 /* Check that we haven't already loaded this object.
1839 Ignore requests to load multiple times */
1843 for (o = objects; o; o = o->next) {
1844 if (0 == strcmp(o->fileName, path)) {
1846 break; /* don't need to search further */
1850 IF_DEBUG(linker, debugBelch(
1851 "GHCi runtime linker: warning: looks like you're trying to load the\n"
1852 "same object file twice:\n"
1854 "GHCi will ignore this, but be warned.\n"
1856 return 1; /* success */
1860 r = stat(path, &st);
1862 IF_DEBUG(linker, debugBelch("File doesn't exist\n"));
1866 fileSize = st.st_size;
1869 /* On many architectures malloc'd memory isn't executable, so we need to use mmap. */
1871 #if defined(openbsd_HOST_OS)
1872 fd = open(path, O_RDONLY, S_IRUSR);
1874 fd = open(path, O_RDONLY);
1877 barf("loadObj: can't open `%s'", path);
1879 image = mmapForLinker(fileSize, 0, fd);
1883 #else /* !USE_MMAP */
1884 /* load the image into memory */
1885 f = fopen(path, "rb");
1887 barf("loadObj: can't read `%s'", path);
1889 # if defined(mingw32_HOST_OS)
1890 // TODO: We would like to use allocateExec here, but allocateExec
1891 // cannot currently allocate blocks large enough.
1892 image = VirtualAlloc(NULL, fileSize, MEM_RESERVE | MEM_COMMIT,
1893 PAGE_EXECUTE_READWRITE);
1894 # elif defined(darwin_HOST_OS)
1895 // In a Mach-O .o file, all sections can and will be misaligned
1896 // if the total size of the headers is not a multiple of the
1897 // desired alignment. This is fine for .o files that only serve
1898 // as input for the static linker, but it's not fine for us,
1899 // as SSE (used by gcc for floating point) and Altivec require
1900 // 16-byte alignment.
1901 // We calculate the correct alignment from the header before
1902 // reading the file, and then we misalign image on purpose so
1903 // that the actual sections end up aligned again.
1904 misalignment = machoGetMisalignment(f);
1905 image = stgMallocBytes(fileSize + misalignment, "loadObj(image)");
1906 image += misalignment;
1908 image = stgMallocBytes(fileSize, "loadObj(image)");
1913 n = fread ( image, 1, fileSize, f );
1915 barf("loadObj: error whilst reading `%s'", path);
1918 #endif /* USE_MMAP */
1920 oc = mkOc(path, image, fileSize, NULL
1922 #ifdef darwin_HOST_OS
1932 loadOc( ObjectCode* oc ) {
1935 IF_DEBUG(linker, debugBelch("loadOc\n"));
1937 # if defined(OBJFORMAT_MACHO) && (defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH))
1938 r = ocAllocateSymbolExtras_MachO ( oc );
1940 IF_DEBUG(linker, debugBelch("ocAllocateSymbolExtras_MachO failed\n"));
1943 # elif defined(OBJFORMAT_ELF) && (defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH))
1944 r = ocAllocateSymbolExtras_ELF ( oc );
1946 IF_DEBUG(linker, debugBelch("ocAllocateSymbolExtras_ELF failed\n"));
1951 /* verify the in-memory image */
1952 # if defined(OBJFORMAT_ELF)
1953 r = ocVerifyImage_ELF ( oc );
1954 # elif defined(OBJFORMAT_PEi386)
1955 r = ocVerifyImage_PEi386 ( oc );
1956 # elif defined(OBJFORMAT_MACHO)
1957 r = ocVerifyImage_MachO ( oc );
1959 barf("loadObj: no verify method");
1962 IF_DEBUG(linker, debugBelch("ocVerifyImage_* failed\n"));
1966 /* build the symbol list for this image */
1967 # if defined(OBJFORMAT_ELF)
1968 r = ocGetNames_ELF ( oc );
1969 # elif defined(OBJFORMAT_PEi386)
1970 r = ocGetNames_PEi386 ( oc );
1971 # elif defined(OBJFORMAT_MACHO)
1972 r = ocGetNames_MachO ( oc );
1974 barf("loadObj: no getNames method");
1977 IF_DEBUG(linker, debugBelch("ocGetNames_* failed\n"));
1981 /* loaded, but not resolved yet */
1982 oc->status = OBJECT_LOADED;
1987 /* -----------------------------------------------------------------------------
1988 * resolve all the currently unlinked objects in memory
1990 * Returns: 1 if ok, 0 on error.
2000 for (oc = objects; oc; oc = oc->next) {
2001 if (oc->status != OBJECT_RESOLVED) {
2002 # if defined(OBJFORMAT_ELF)
2003 r = ocResolve_ELF ( oc );
2004 # elif defined(OBJFORMAT_PEi386)
2005 r = ocResolve_PEi386 ( oc );
2006 # elif defined(OBJFORMAT_MACHO)
2007 r = ocResolve_MachO ( oc );
2009 barf("resolveObjs: not implemented on this platform");
2011 if (!r) { return r; }
2012 oc->status = OBJECT_RESOLVED;
2018 /* -----------------------------------------------------------------------------
2019 * delete an object from the pool
2022 unloadObj( char *path )
2024 ObjectCode *oc, *prev;
2025 HsBool unloadedAnyObj = HS_BOOL_FALSE;
2027 ASSERT(symhash != NULL);
2028 ASSERT(objects != NULL);
2033 for (oc = objects; oc; prev = oc, oc = oc->next) {
2034 if (!strcmp(oc->fileName,path)) {
2036 /* Remove all the mappings for the symbols within this
2041 for (i = 0; i < oc->n_symbols; i++) {
2042 if (oc->symbols[i] != NULL) {
2043 removeStrHashTable(symhash, oc->symbols[i], NULL);
2051 prev->next = oc->next;
2054 // We're going to leave this in place, in case there are
2055 // any pointers from the heap into it:
2056 // #ifdef mingw32_HOST_OS
2057 // VirtualFree(oc->image);
2059 // stgFree(oc->image);
2061 stgFree(oc->fileName);
2062 stgFree(oc->symbols);
2063 stgFree(oc->sections);
2066 /* This could be a member of an archive so continue
2067 * unloading other members. */
2068 unloadedAnyObj = HS_BOOL_TRUE;
2072 if (unloadedAnyObj) {
2076 errorBelch("unloadObj: can't find `%s' to unload", path);
2081 /* -----------------------------------------------------------------------------
2082 * Sanity checking. For each ObjectCode, maintain a list of address ranges
2083 * which may be prodded during relocation, and abort if we try and write
2084 * outside any of these.
2086 static void addProddableBlock ( ObjectCode* oc, void* start, int size )
2089 = stgMallocBytes(sizeof(ProddableBlock), "addProddableBlock");
2090 /* debugBelch("aPB %p %p %d\n", oc, start, size); */
2094 pb->next = oc->proddables;
2095 oc->proddables = pb;
2098 static void checkProddableBlock ( ObjectCode* oc, void* addr )
2101 for (pb = oc->proddables; pb != NULL; pb = pb->next) {
2102 char* s = (char*)(pb->start);
2103 char* e = s + pb->size - 1;
2104 char* a = (char*)addr;
2105 /* Assumes that the biggest fixup involves a 4-byte write. This
2106 probably needs to be changed to 8 (ie, +7) on 64-bit
2108 if (a >= s && (a+3) <= e) return;
2110 barf("checkProddableBlock: invalid fixup in runtime linker");
2113 /* -----------------------------------------------------------------------------
2114 * Section management.
2116 static void addSection ( ObjectCode* oc, SectionKind kind,
2117 void* start, void* end )
2119 Section* s = stgMallocBytes(sizeof(Section), "addSection");
2123 s->next = oc->sections;
2126 debugBelch("addSection: %p-%p (size %d), kind %d\n",
2127 start, ((char*)end)-1, end - start + 1, kind );
2132 /* --------------------------------------------------------------------------
2134 * This is about allocating a small chunk of memory for every symbol in the
2135 * object file. We make sure that the SymboLExtras are always "in range" of
2136 * limited-range PC-relative instructions on various platforms by allocating
2137 * them right next to the object code itself.
2140 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
2143 ocAllocateSymbolExtras
2145 Allocate additional space at the end of the object file image to make room
2146 for jump islands (powerpc, x86_64) and GOT entries (x86_64).
2148 PowerPC relative branch instructions have a 24 bit displacement field.
2149 As PPC code is always 4-byte-aligned, this yields a +-32MB range.
2150 If a particular imported symbol is outside this range, we have to redirect
2151 the jump to a short piece of new code that just loads the 32bit absolute
2152 address and jumps there.
2153 On x86_64, PC-relative jumps and PC-relative accesses to the GOT are limited
2156 This function just allocates space for one SymbolExtra for every
2157 undefined symbol in the object file. The code for the jump islands is
2158 filled in by makeSymbolExtra below.
2161 static int ocAllocateSymbolExtras( ObjectCode* oc, int count, int first )
2168 int misalignment = 0;
2169 #ifdef darwin_HOST_OS
2170 misalignment = oc->misalignment;
2176 // round up to the nearest 4
2177 aligned = (oc->fileSize + 3) & ~3;
2180 pagesize = getpagesize();
2181 n = ROUND_UP( oc->fileSize, pagesize );
2182 m = ROUND_UP( aligned + sizeof (SymbolExtra) * count, pagesize );
2184 /* we try to use spare space at the end of the last page of the
2185 * image for the jump islands, but if there isn't enough space
2186 * then we have to map some (anonymously, remembering MAP_32BIT).
2188 if( m > n ) // we need to allocate more pages
2190 oc->symbol_extras = mmapForLinker(sizeof(SymbolExtra) * count,
2195 oc->symbol_extras = (SymbolExtra *) (oc->image + aligned);
2198 oc->image -= misalignment;
2199 oc->image = stgReallocBytes( oc->image,
2201 aligned + sizeof (SymbolExtra) * count,
2202 "ocAllocateSymbolExtras" );
2203 oc->image += misalignment;
2205 oc->symbol_extras = (SymbolExtra *) (oc->image + aligned);
2206 #endif /* USE_MMAP */
2208 memset( oc->symbol_extras, 0, sizeof (SymbolExtra) * count );
2211 oc->symbol_extras = NULL;
2213 oc->first_symbol_extra = first;
2214 oc->n_symbol_extras = count;
2219 static SymbolExtra* makeSymbolExtra( ObjectCode* oc,
2220 unsigned long symbolNumber,
2221 unsigned long target )
2225 ASSERT( symbolNumber >= oc->first_symbol_extra
2226 && symbolNumber - oc->first_symbol_extra < oc->n_symbol_extras);
2228 extra = &oc->symbol_extras[symbolNumber - oc->first_symbol_extra];
2230 #ifdef powerpc_HOST_ARCH
2231 // lis r12, hi16(target)
2232 extra->jumpIsland.lis_r12 = 0x3d80;
2233 extra->jumpIsland.hi_addr = target >> 16;
2235 // ori r12, r12, lo16(target)
2236 extra->jumpIsland.ori_r12_r12 = 0x618c;
2237 extra->jumpIsland.lo_addr = target & 0xffff;
2240 extra->jumpIsland.mtctr_r12 = 0x7d8903a6;
2243 extra->jumpIsland.bctr = 0x4e800420;
2245 #ifdef x86_64_HOST_ARCH
2247 static uint8_t jmp[] = { 0xFF, 0x25, 0xF2, 0xFF, 0xFF, 0xFF };
2248 extra->addr = target;
2249 memcpy(extra->jumpIsland, jmp, 6);
2257 /* --------------------------------------------------------------------------
2258 * PowerPC specifics (instruction cache flushing)
2259 * ------------------------------------------------------------------------*/
2261 #ifdef powerpc_HOST_ARCH
2263 ocFlushInstructionCache
2265 Flush the data & instruction caches.
2266 Because the PPC has split data/instruction caches, we have to
2267 do that whenever we modify code at runtime.
2270 static void ocFlushInstructionCache( ObjectCode *oc )
2272 int n = (oc->fileSize + sizeof( SymbolExtra ) * oc->n_symbol_extras + 3) / 4;
2273 unsigned long *p = (unsigned long *) oc->image;
2277 __asm__ volatile ( "dcbf 0,%0\n\t"
2285 __asm__ volatile ( "sync\n\t"
2291 /* --------------------------------------------------------------------------
2292 * PEi386 specifics (Win32 targets)
2293 * ------------------------------------------------------------------------*/
2295 /* The information for this linker comes from
2296 Microsoft Portable Executable
2297 and Common Object File Format Specification
2298 revision 5.1 January 1998
2299 which SimonM says comes from the MS Developer Network CDs.
2301 It can be found there (on older CDs), but can also be found
2304 http://www.microsoft.com/hwdev/hardware/PECOFF.asp
2306 (this is Rev 6.0 from February 1999).
2308 Things move, so if that fails, try searching for it via
2310 http://www.google.com/search?q=PE+COFF+specification
2312 The ultimate reference for the PE format is the Winnt.h
2313 header file that comes with the Platform SDKs; as always,
2314 implementations will drift wrt their documentation.
2316 A good background article on the PE format is Matt Pietrek's
2317 March 1994 article in Microsoft System Journal (MSJ)
2318 (Vol.9, No. 3): "Peering Inside the PE: A Tour of the
2319 Win32 Portable Executable File Format." The info in there
2320 has recently been updated in a two part article in
2321 MSDN magazine, issues Feb and March 2002,
2322 "Inside Windows: An In-Depth Look into the Win32 Portable
2323 Executable File Format"
2325 John Levine's book "Linkers and Loaders" contains useful
2330 #if defined(OBJFORMAT_PEi386)
2334 typedef unsigned char UChar;
2335 typedef unsigned short UInt16;
2336 typedef unsigned int UInt32;
2343 UInt16 NumberOfSections;
2344 UInt32 TimeDateStamp;
2345 UInt32 PointerToSymbolTable;
2346 UInt32 NumberOfSymbols;
2347 UInt16 SizeOfOptionalHeader;
2348 UInt16 Characteristics;
2352 #define sizeof_COFF_header 20
2359 UInt32 VirtualAddress;
2360 UInt32 SizeOfRawData;
2361 UInt32 PointerToRawData;
2362 UInt32 PointerToRelocations;
2363 UInt32 PointerToLinenumbers;
2364 UInt16 NumberOfRelocations;
2365 UInt16 NumberOfLineNumbers;
2366 UInt32 Characteristics;
2370 #define sizeof_COFF_section 40
2377 UInt16 SectionNumber;
2380 UChar NumberOfAuxSymbols;
2384 #define sizeof_COFF_symbol 18
2389 UInt32 VirtualAddress;
2390 UInt32 SymbolTableIndex;
2395 #define sizeof_COFF_reloc 10
2398 /* From PE spec doc, section 3.3.2 */
2399 /* Note use of MYIMAGE_* since IMAGE_* are already defined in
2400 windows.h -- for the same purpose, but I want to know what I'm
2402 #define MYIMAGE_FILE_RELOCS_STRIPPED 0x0001
2403 #define MYIMAGE_FILE_EXECUTABLE_IMAGE 0x0002
2404 #define MYIMAGE_FILE_DLL 0x2000
2405 #define MYIMAGE_FILE_SYSTEM 0x1000
2406 #define MYIMAGE_FILE_BYTES_REVERSED_HI 0x8000
2407 #define MYIMAGE_FILE_BYTES_REVERSED_LO 0x0080
2408 #define MYIMAGE_FILE_32BIT_MACHINE 0x0100
2410 /* From PE spec doc, section 5.4.2 and 5.4.4 */
2411 #define MYIMAGE_SYM_CLASS_EXTERNAL 2
2412 #define MYIMAGE_SYM_CLASS_STATIC 3
2413 #define MYIMAGE_SYM_UNDEFINED 0
2415 /* From PE spec doc, section 4.1 */
2416 #define MYIMAGE_SCN_CNT_CODE 0x00000020
2417 #define MYIMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040
2418 #define MYIMAGE_SCN_LNK_NRELOC_OVFL 0x01000000
2420 /* From PE spec doc, section 5.2.1 */
2421 #define MYIMAGE_REL_I386_DIR32 0x0006
2422 #define MYIMAGE_REL_I386_REL32 0x0014
2425 /* We use myindex to calculate array addresses, rather than
2426 simply doing the normal subscript thing. That's because
2427 some of the above structs have sizes which are not
2428 a whole number of words. GCC rounds their sizes up to a
2429 whole number of words, which means that the address calcs
2430 arising from using normal C indexing or pointer arithmetic
2431 are just plain wrong. Sigh.
2434 myindex ( int scale, void* base, int index )
2437 ((UChar*)base) + scale * index;
2442 printName ( UChar* name, UChar* strtab )
2444 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
2445 UInt32 strtab_offset = * (UInt32*)(name+4);
2446 debugBelch("%s", strtab + strtab_offset );
2449 for (i = 0; i < 8; i++) {
2450 if (name[i] == 0) break;
2451 debugBelch("%c", name[i] );
2458 copyName ( UChar* name, UChar* strtab, UChar* dst, int dstSize )
2460 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
2461 UInt32 strtab_offset = * (UInt32*)(name+4);
2462 strncpy ( (char*)dst, (char*)strtab+strtab_offset, dstSize );
2468 if (name[i] == 0) break;
2478 cstring_from_COFF_symbol_name ( UChar* name, UChar* strtab )
2481 /* If the string is longer than 8 bytes, look in the
2482 string table for it -- this will be correctly zero terminated.
2484 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
2485 UInt32 strtab_offset = * (UInt32*)(name+4);
2486 return ((UChar*)strtab) + strtab_offset;
2488 /* Otherwise, if shorter than 8 bytes, return the original,
2489 which by defn is correctly terminated.
2491 if (name[7]==0) return name;
2492 /* The annoying case: 8 bytes. Copy into a temporary
2493 (XXX which is never freed ...)
2495 newstr = stgMallocBytes(9, "cstring_from_COFF_symbol_name");
2497 strncpy((char*)newstr,(char*)name,8);
2502 /* Getting the name of a section is mildly tricky, so we make a
2503 function for it. Sadly, in one case we have to copy the string
2504 (when it is exactly 8 bytes long there's no trailing '\0'), so for
2505 consistency we *always* copy the string; the caller must free it
2508 cstring_from_section_name (UChar* name, UChar* strtab)
2513 int strtab_offset = strtol((char*)name+1,NULL,10);
2514 int len = strlen(((char*)strtab) + strtab_offset);
2516 newstr = stgMallocBytes(len, "cstring_from_section_symbol_name");
2517 strcpy((char*)newstr, (char*)((UChar*)strtab) + strtab_offset);
2522 newstr = stgMallocBytes(9, "cstring_from_section_symbol_name");
2524 strncpy((char*)newstr,(char*)name,8);
2530 /* Just compares the short names (first 8 chars) */
2531 static COFF_section *
2532 findPEi386SectionCalled ( ObjectCode* oc, UChar* name )
2536 = (COFF_header*)(oc->image);
2537 COFF_section* sectab
2539 ((UChar*)(oc->image))
2540 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2542 for (i = 0; i < hdr->NumberOfSections; i++) {
2545 COFF_section* section_i
2547 myindex ( sizeof_COFF_section, sectab, i );
2548 n1 = (UChar*) &(section_i->Name);
2550 if (n1[0]==n2[0] && n1[1]==n2[1] && n1[2]==n2[2] &&
2551 n1[3]==n2[3] && n1[4]==n2[4] && n1[5]==n2[5] &&
2552 n1[6]==n2[6] && n1[7]==n2[7])
2561 zapTrailingAtSign ( UChar* sym )
2563 # define my_isdigit(c) ((c) >= '0' && (c) <= '9')
2565 if (sym[0] == 0) return;
2567 while (sym[i] != 0) i++;
2570 while (j > 0 && my_isdigit(sym[j])) j--;
2571 if (j > 0 && sym[j] == '@' && j != i) sym[j] = 0;
2576 lookupSymbolInDLLs ( UChar *lbl )
2581 for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next) {
2582 /* debugBelch("look in %s for %s\n", o_dll->name, lbl); */
2584 if (lbl[0] == '_') {
2585 /* HACK: if the name has an initial underscore, try stripping
2586 it off & look that up first. I've yet to verify whether there's
2587 a Rule that governs whether an initial '_' *should always* be
2588 stripped off when mapping from import lib name to the DLL name.
2590 sym = GetProcAddress(o_dll->instance, (char*)(lbl+1));
2592 /*debugBelch("found %s in %s\n", lbl+1,o_dll->name);*/
2596 sym = GetProcAddress(o_dll->instance, (char*)lbl);
2598 /*debugBelch("found %s in %s\n", lbl,o_dll->name);*/
2607 ocVerifyImage_PEi386 ( ObjectCode* oc )
2612 COFF_section* sectab;
2613 COFF_symbol* symtab;
2615 /* debugBelch("\nLOADING %s\n", oc->fileName); */
2616 hdr = (COFF_header*)(oc->image);
2617 sectab = (COFF_section*) (
2618 ((UChar*)(oc->image))
2619 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2621 symtab = (COFF_symbol*) (
2622 ((UChar*)(oc->image))
2623 + hdr->PointerToSymbolTable
2625 strtab = ((UChar*)symtab)
2626 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2628 if (hdr->Machine != 0x14c) {
2629 errorBelch("%s: Not x86 PEi386", oc->fileName);
2632 if (hdr->SizeOfOptionalHeader != 0) {
2633 errorBelch("%s: PEi386 with nonempty optional header", oc->fileName);
2636 if ( /* (hdr->Characteristics & MYIMAGE_FILE_RELOCS_STRIPPED) || */
2637 (hdr->Characteristics & MYIMAGE_FILE_EXECUTABLE_IMAGE) ||
2638 (hdr->Characteristics & MYIMAGE_FILE_DLL) ||
2639 (hdr->Characteristics & MYIMAGE_FILE_SYSTEM) ) {
2640 errorBelch("%s: Not a PEi386 object file", oc->fileName);
2643 if ( (hdr->Characteristics & MYIMAGE_FILE_BYTES_REVERSED_HI)
2644 /* || !(hdr->Characteristics & MYIMAGE_FILE_32BIT_MACHINE) */ ) {
2645 errorBelch("%s: Invalid PEi386 word size or endiannness: %d",
2647 (int)(hdr->Characteristics));
2650 /* If the string table size is way crazy, this might indicate that
2651 there are more than 64k relocations, despite claims to the
2652 contrary. Hence this test. */
2653 /* debugBelch("strtab size %d\n", * (UInt32*)strtab); */
2655 if ( (*(UInt32*)strtab) > 600000 ) {
2656 /* Note that 600k has no special significance other than being
2657 big enough to handle the almost-2MB-sized lumps that
2658 constitute HSwin32*.o. */
2659 debugBelch("PEi386 object has suspiciously large string table; > 64k relocs?");
2664 /* No further verification after this point; only debug printing. */
2666 IF_DEBUG(linker, i=1);
2667 if (i == 0) return 1;
2669 debugBelch( "sectab offset = %d\n", ((UChar*)sectab) - ((UChar*)hdr) );
2670 debugBelch( "symtab offset = %d\n", ((UChar*)symtab) - ((UChar*)hdr) );
2671 debugBelch( "strtab offset = %d\n", ((UChar*)strtab) - ((UChar*)hdr) );
2674 debugBelch( "Machine: 0x%x\n", (UInt32)(hdr->Machine) );
2675 debugBelch( "# sections: %d\n", (UInt32)(hdr->NumberOfSections) );
2676 debugBelch( "time/date: 0x%x\n", (UInt32)(hdr->TimeDateStamp) );
2677 debugBelch( "symtab offset: %d\n", (UInt32)(hdr->PointerToSymbolTable) );
2678 debugBelch( "# symbols: %d\n", (UInt32)(hdr->NumberOfSymbols) );
2679 debugBelch( "sz of opt hdr: %d\n", (UInt32)(hdr->SizeOfOptionalHeader) );
2680 debugBelch( "characteristics: 0x%x\n", (UInt32)(hdr->Characteristics) );
2682 /* Print the section table. */
2684 for (i = 0; i < hdr->NumberOfSections; i++) {
2686 COFF_section* sectab_i
2688 myindex ( sizeof_COFF_section, sectab, i );
2695 printName ( sectab_i->Name, strtab );
2705 sectab_i->VirtualSize,
2706 sectab_i->VirtualAddress,
2707 sectab_i->SizeOfRawData,
2708 sectab_i->PointerToRawData,
2709 sectab_i->NumberOfRelocations,
2710 sectab_i->PointerToRelocations,
2711 sectab_i->PointerToRawData
2713 reltab = (COFF_reloc*) (
2714 ((UChar*)(oc->image)) + sectab_i->PointerToRelocations
2717 if ( sectab_i->Characteristics & MYIMAGE_SCN_LNK_NRELOC_OVFL ) {
2718 /* If the relocation field (a short) has overflowed, the
2719 * real count can be found in the first reloc entry.
2721 * See Section 4.1 (last para) of the PE spec (rev6.0).
2723 COFF_reloc* rel = (COFF_reloc*)
2724 myindex ( sizeof_COFF_reloc, reltab, 0 );
2725 noRelocs = rel->VirtualAddress;
2728 noRelocs = sectab_i->NumberOfRelocations;
2732 for (; j < noRelocs; j++) {
2734 COFF_reloc* rel = (COFF_reloc*)
2735 myindex ( sizeof_COFF_reloc, reltab, j );
2737 " type 0x%-4x vaddr 0x%-8x name `",
2739 rel->VirtualAddress );
2740 sym = (COFF_symbol*)
2741 myindex ( sizeof_COFF_symbol, symtab, rel->SymbolTableIndex );
2742 /* Hmm..mysterious looking offset - what's it for? SOF */
2743 printName ( sym->Name, strtab -10 );
2750 debugBelch("string table has size 0x%x\n", * (UInt32*)strtab );
2751 debugBelch("---START of string table---\n");
2752 for (i = 4; i < *(Int32*)strtab; i++) {
2754 debugBelch("\n"); else
2755 debugBelch("%c", strtab[i] );
2757 debugBelch("--- END of string table---\n");
2762 COFF_symbol* symtab_i;
2763 if (i >= (Int32)(hdr->NumberOfSymbols)) break;
2764 symtab_i = (COFF_symbol*)
2765 myindex ( sizeof_COFF_symbol, symtab, i );
2771 printName ( symtab_i->Name, strtab );
2780 (Int32)(symtab_i->SectionNumber),
2781 (UInt32)symtab_i->Type,
2782 (UInt32)symtab_i->StorageClass,
2783 (UInt32)symtab_i->NumberOfAuxSymbols
2785 i += symtab_i->NumberOfAuxSymbols;
2795 ocGetNames_PEi386 ( ObjectCode* oc )
2798 COFF_section* sectab;
2799 COFF_symbol* symtab;
2806 hdr = (COFF_header*)(oc->image);
2807 sectab = (COFF_section*) (
2808 ((UChar*)(oc->image))
2809 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2811 symtab = (COFF_symbol*) (
2812 ((UChar*)(oc->image))
2813 + hdr->PointerToSymbolTable
2815 strtab = ((UChar*)(oc->image))
2816 + hdr->PointerToSymbolTable
2817 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2819 /* Allocate space for any (local, anonymous) .bss sections. */
2821 for (i = 0; i < hdr->NumberOfSections; i++) {
2824 COFF_section* sectab_i
2826 myindex ( sizeof_COFF_section, sectab, i );
2828 char *secname = cstring_from_section_name(sectab_i->Name, strtab);
2830 if (0 != strcmp(secname, ".bss")) {
2837 /* sof 10/05: the PE spec text isn't too clear regarding what
2838 * the SizeOfRawData field is supposed to hold for object
2839 * file sections containing just uninitialized data -- for executables,
2840 * it is supposed to be zero; unclear what it's supposed to be
2841 * for object files. However, VirtualSize is guaranteed to be
2842 * zero for object files, which definitely suggests that SizeOfRawData
2843 * will be non-zero (where else would the size of this .bss section be
2844 * stored?) Looking at the COFF_section info for incoming object files,
2845 * this certainly appears to be the case.
2847 * => I suspect we've been incorrectly handling .bss sections in (relocatable)
2848 * object files up until now. This turned out to bite us with ghc-6.4.1's use
2849 * of gcc-3.4.x, which has started to emit initially-zeroed-out local 'static'
2850 * variable decls into to the .bss section. (The specific function in Q which
2851 * triggered this is libraries/base/cbits/dirUtils.c:__hscore_getFolderPath())
2853 if (sectab_i->VirtualSize == 0 && sectab_i->SizeOfRawData == 0) continue;
2854 /* This is a non-empty .bss section. Allocate zeroed space for
2855 it, and set its PointerToRawData field such that oc->image +
2856 PointerToRawData == addr_of_zeroed_space. */
2857 bss_sz = sectab_i->VirtualSize;
2858 if ( bss_sz < sectab_i->SizeOfRawData) { bss_sz = sectab_i->SizeOfRawData; }
2859 zspace = stgCallocBytes(1, bss_sz, "ocGetNames_PEi386(anonymous bss)");
2860 sectab_i->PointerToRawData = ((UChar*)zspace) - ((UChar*)(oc->image));
2861 addProddableBlock(oc, zspace, bss_sz);
2862 /* debugBelch("BSS anon section at 0x%x\n", zspace); */
2865 /* Copy section information into the ObjectCode. */
2867 for (i = 0; i < hdr->NumberOfSections; i++) {
2873 = SECTIONKIND_OTHER;
2874 COFF_section* sectab_i
2876 myindex ( sizeof_COFF_section, sectab, i );
2878 char *secname = cstring_from_section_name(sectab_i->Name, strtab);
2880 IF_DEBUG(linker, debugBelch("section name = %s\n", secname ));
2883 /* I'm sure this is the Right Way to do it. However, the
2884 alternative of testing the sectab_i->Name field seems to
2885 work ok with Cygwin.
2887 if (sectab_i->Characteristics & MYIMAGE_SCN_CNT_CODE ||
2888 sectab_i->Characteristics & MYIMAGE_SCN_CNT_INITIALIZED_DATA)
2889 kind = SECTIONKIND_CODE_OR_RODATA;
2892 if (0==strcmp(".text",(char*)secname) ||
2893 0==strcmp(".rdata",(char*)secname)||
2894 0==strcmp(".rodata",(char*)secname))
2895 kind = SECTIONKIND_CODE_OR_RODATA;
2896 if (0==strcmp(".data",(char*)secname) ||
2897 0==strcmp(".bss",(char*)secname))
2898 kind = SECTIONKIND_RWDATA;
2900 ASSERT(sectab_i->SizeOfRawData == 0 || sectab_i->VirtualSize == 0);
2901 sz = sectab_i->SizeOfRawData;
2902 if (sz < sectab_i->VirtualSize) sz = sectab_i->VirtualSize;
2904 start = ((UChar*)(oc->image)) + sectab_i->PointerToRawData;
2905 end = start + sz - 1;
2907 if (kind == SECTIONKIND_OTHER
2908 /* Ignore sections called which contain stabs debugging
2910 && 0 != strcmp(".stab", (char*)secname)
2911 && 0 != strcmp(".stabstr", (char*)secname)
2912 /* ignore constructor section for now */
2913 && 0 != strcmp(".ctors", (char*)secname)
2914 /* ignore section generated from .ident */
2915 && 0!= strncmp(".debug", (char*)secname, 6)
2916 /* ignore unknown section that appeared in gcc 3.4.5(?) */
2917 && 0!= strcmp(".reloc", (char*)secname)
2918 && 0 != strcmp(".rdata$zzz", (char*)secname)
2920 errorBelch("Unknown PEi386 section name `%s' (while processing: %s)", secname, oc->fileName);
2925 if (kind != SECTIONKIND_OTHER && end >= start) {
2926 addSection(oc, kind, start, end);
2927 addProddableBlock(oc, start, end - start + 1);
2933 /* Copy exported symbols into the ObjectCode. */
2935 oc->n_symbols = hdr->NumberOfSymbols;
2936 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
2937 "ocGetNames_PEi386(oc->symbols)");
2938 /* Call me paranoid; I don't care. */
2939 for (i = 0; i < oc->n_symbols; i++)
2940 oc->symbols[i] = NULL;
2944 COFF_symbol* symtab_i;
2945 if (i >= (Int32)(hdr->NumberOfSymbols)) break;
2946 symtab_i = (COFF_symbol*)
2947 myindex ( sizeof_COFF_symbol, symtab, i );
2951 if (symtab_i->StorageClass == MYIMAGE_SYM_CLASS_EXTERNAL
2952 && symtab_i->SectionNumber != MYIMAGE_SYM_UNDEFINED) {
2953 /* This symbol is global and defined, viz, exported */
2954 /* for MYIMAGE_SYMCLASS_EXTERNAL
2955 && !MYIMAGE_SYM_UNDEFINED,
2956 the address of the symbol is:
2957 address of relevant section + offset in section
2959 COFF_section* sectabent
2960 = (COFF_section*) myindex ( sizeof_COFF_section,
2962 symtab_i->SectionNumber-1 );
2963 addr = ((UChar*)(oc->image))
2964 + (sectabent->PointerToRawData
2968 if (symtab_i->SectionNumber == MYIMAGE_SYM_UNDEFINED
2969 && symtab_i->Value > 0) {
2970 /* This symbol isn't in any section at all, ie, global bss.
2971 Allocate zeroed space for it. */
2972 addr = stgCallocBytes(1, symtab_i->Value,
2973 "ocGetNames_PEi386(non-anonymous bss)");
2974 addSection(oc, SECTIONKIND_RWDATA, addr,
2975 ((UChar*)addr) + symtab_i->Value - 1);
2976 addProddableBlock(oc, addr, symtab_i->Value);
2977 /* debugBelch("BSS section at 0x%x\n", addr); */
2980 if (addr != NULL ) {
2981 sname = cstring_from_COFF_symbol_name ( symtab_i->Name, strtab );
2982 /* debugBelch("addSymbol %p `%s \n", addr,sname); */
2983 IF_DEBUG(linker, debugBelch("addSymbol %p `%s'\n", addr,sname);)
2984 ASSERT(i >= 0 && i < oc->n_symbols);
2985 /* cstring_from_COFF_symbol_name always succeeds. */
2986 oc->symbols[i] = (char*)sname;
2987 ghciInsertStrHashTable(oc->fileName, symhash, (char*)sname, addr);
2991 "IGNORING symbol %d\n"
2995 printName ( symtab_i->Name, strtab );
3004 (Int32)(symtab_i->SectionNumber),
3005 (UInt32)symtab_i->Type,
3006 (UInt32)symtab_i->StorageClass,
3007 (UInt32)symtab_i->NumberOfAuxSymbols
3012 i += symtab_i->NumberOfAuxSymbols;
3021 ocResolve_PEi386 ( ObjectCode* oc )
3024 COFF_section* sectab;
3025 COFF_symbol* symtab;
3035 /* ToDo: should be variable-sized? But is at least safe in the
3036 sense of buffer-overrun-proof. */
3038 /* debugBelch("resolving for %s\n", oc->fileName); */
3040 hdr = (COFF_header*)(oc->image);
3041 sectab = (COFF_section*) (
3042 ((UChar*)(oc->image))
3043 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
3045 symtab = (COFF_symbol*) (
3046 ((UChar*)(oc->image))
3047 + hdr->PointerToSymbolTable
3049 strtab = ((UChar*)(oc->image))
3050 + hdr->PointerToSymbolTable
3051 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
3053 for (i = 0; i < hdr->NumberOfSections; i++) {
3054 COFF_section* sectab_i
3056 myindex ( sizeof_COFF_section, sectab, i );
3059 ((UChar*)(oc->image)) + sectab_i->PointerToRelocations
3062 char *secname = cstring_from_section_name(sectab_i->Name, strtab);
3064 /* Ignore sections called which contain stabs debugging
3066 if (0 == strcmp(".stab", (char*)secname)
3067 || 0 == strcmp(".stabstr", (char*)secname)
3068 || 0 == strcmp(".ctors", (char*)secname)
3069 || 0 == strncmp(".debug", (char*)secname, 6)
3070 || 0 == strcmp(".rdata$zzz", (char*)secname)) {
3077 if ( sectab_i->Characteristics & MYIMAGE_SCN_LNK_NRELOC_OVFL ) {
3078 /* If the relocation field (a short) has overflowed, the
3079 * real count can be found in the first reloc entry.
3081 * See Section 4.1 (last para) of the PE spec (rev6.0).
3083 * Nov2003 update: the GNU linker still doesn't correctly
3084 * handle the generation of relocatable object files with
3085 * overflown relocations. Hence the output to warn of potential
3088 COFF_reloc* rel = (COFF_reloc*)
3089 myindex ( sizeof_COFF_reloc, reltab, 0 );
3090 noRelocs = rel->VirtualAddress;
3092 /* 10/05: we now assume (and check for) a GNU ld that is capable
3093 * of handling object files with (>2^16) of relocs.
3096 debugBelch("WARNING: Overflown relocation field (# relocs found: %u)\n",
3101 noRelocs = sectab_i->NumberOfRelocations;
3106 for (; j < noRelocs; j++) {
3108 COFF_reloc* reltab_j
3110 myindex ( sizeof_COFF_reloc, reltab, j );
3112 /* the location to patch */
3114 ((UChar*)(oc->image))
3115 + (sectab_i->PointerToRawData
3116 + reltab_j->VirtualAddress
3117 - sectab_i->VirtualAddress )
3119 /* the existing contents of pP */
3121 /* the symbol to connect to */
3122 sym = (COFF_symbol*)
3123 myindex ( sizeof_COFF_symbol,
3124 symtab, reltab_j->SymbolTableIndex );
3127 "reloc sec %2d num %3d: type 0x%-4x "
3128 "vaddr 0x%-8x name `",
3130 (UInt32)reltab_j->Type,
3131 reltab_j->VirtualAddress );
3132 printName ( sym->Name, strtab );
3133 debugBelch("'\n" ));
3135 if (sym->StorageClass == MYIMAGE_SYM_CLASS_STATIC) {
3136 COFF_section* section_sym
3137 = findPEi386SectionCalled ( oc, sym->Name );
3139 errorBelch("%s: can't find section `%s'", oc->fileName, sym->Name);
3142 S = ((UInt32)(oc->image))
3143 + (section_sym->PointerToRawData
3146 copyName ( sym->Name, strtab, symbol, 1000-1 );
3147 S = (UInt32) lookupSymbol( (char*)symbol );
3148 if ((void*)S != NULL) goto foundit;
3149 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3153 checkProddableBlock(oc, pP);
3154 switch (reltab_j->Type) {
3155 case MYIMAGE_REL_I386_DIR32:
3158 case MYIMAGE_REL_I386_REL32:
3159 /* Tricky. We have to insert a displacement at
3160 pP which, when added to the PC for the _next_
3161 insn, gives the address of the target (S).
3162 Problem is to know the address of the next insn
3163 when we only know pP. We assume that this
3164 literal field is always the last in the insn,
3165 so that the address of the next insn is pP+4
3166 -- hence the constant 4.
3167 Also I don't know if A should be added, but so
3168 far it has always been zero.
3170 SOF 05/2005: 'A' (old contents of *pP) have been observed
3171 to contain values other than zero (the 'wx' object file
3172 that came with wxhaskell-0.9.4; dunno how it was compiled..).
3173 So, add displacement to old value instead of asserting
3174 A to be zero. Fixes wxhaskell-related crashes, and no other
3175 ill effects have been observed.
3177 Update: the reason why we're seeing these more elaborate
3178 relocations is due to a switch in how the NCG compiles SRTs
3179 and offsets to them from info tables. SRTs live in .(ro)data,
3180 while info tables live in .text, causing GAS to emit REL32/DISP32
3181 relocations with non-zero values. Adding the displacement is
3182 the right thing to do.
3184 *pP = S - ((UInt32)pP) - 4 + A;
3187 debugBelch("%s: unhandled PEi386 relocation type %d",
3188 oc->fileName, reltab_j->Type);
3195 IF_DEBUG(linker, debugBelch("completed %s", oc->fileName));
3199 #endif /* defined(OBJFORMAT_PEi386) */
3202 /* --------------------------------------------------------------------------
3204 * ------------------------------------------------------------------------*/
3206 #if defined(OBJFORMAT_ELF)
3211 #if defined(sparc_HOST_ARCH)
3212 # define ELF_TARGET_SPARC /* Used inside <elf.h> */
3213 #elif defined(i386_HOST_ARCH)
3214 # define ELF_TARGET_386 /* Used inside <elf.h> */
3215 #elif defined(x86_64_HOST_ARCH)
3216 # define ELF_TARGET_X64_64
3220 #if !defined(openbsd_HOST_OS)
3223 /* openbsd elf has things in different places, with diff names */
3224 # include <elf_abi.h>
3225 # include <machine/reloc.h>
3226 # define R_386_32 RELOC_32
3227 # define R_386_PC32 RELOC_PC32
3230 /* If elf.h doesn't define it */
3231 # ifndef R_X86_64_PC64
3232 # define R_X86_64_PC64 24
3236 * Define a set of types which can be used for both ELF32 and ELF64
3240 #define ELFCLASS ELFCLASS64
3241 #define Elf_Addr Elf64_Addr
3242 #define Elf_Word Elf64_Word
3243 #define Elf_Sword Elf64_Sword
3244 #define Elf_Ehdr Elf64_Ehdr
3245 #define Elf_Phdr Elf64_Phdr
3246 #define Elf_Shdr Elf64_Shdr
3247 #define Elf_Sym Elf64_Sym
3248 #define Elf_Rel Elf64_Rel
3249 #define Elf_Rela Elf64_Rela
3251 #define ELF_ST_TYPE ELF64_ST_TYPE
3254 #define ELF_ST_BIND ELF64_ST_BIND
3257 #define ELF_R_TYPE ELF64_R_TYPE
3260 #define ELF_R_SYM ELF64_R_SYM
3263 #define ELFCLASS ELFCLASS32
3264 #define Elf_Addr Elf32_Addr
3265 #define Elf_Word Elf32_Word
3266 #define Elf_Sword Elf32_Sword
3267 #define Elf_Ehdr Elf32_Ehdr
3268 #define Elf_Phdr Elf32_Phdr
3269 #define Elf_Shdr Elf32_Shdr
3270 #define Elf_Sym Elf32_Sym
3271 #define Elf_Rel Elf32_Rel
3272 #define Elf_Rela Elf32_Rela
3274 #define ELF_ST_TYPE ELF32_ST_TYPE
3277 #define ELF_ST_BIND ELF32_ST_BIND
3280 #define ELF_R_TYPE ELF32_R_TYPE
3283 #define ELF_R_SYM ELF32_R_SYM
3289 * Functions to allocate entries in dynamic sections. Currently we simply
3290 * preallocate a large number, and we don't check if a entry for the given
3291 * target already exists (a linear search is too slow). Ideally these
3292 * entries would be associated with symbols.
3295 /* These sizes sufficient to load HSbase + HShaskell98 + a few modules */
3296 #define GOT_SIZE 0x20000
3297 #define FUNCTION_TABLE_SIZE 0x10000
3298 #define PLT_SIZE 0x08000
3301 static Elf_Addr got[GOT_SIZE];
3302 static unsigned int gotIndex;
3303 static Elf_Addr gp_val = (Elf_Addr)got;
3306 allocateGOTEntry(Elf_Addr target)
3310 if (gotIndex >= GOT_SIZE)
3311 barf("Global offset table overflow");
3313 entry = &got[gotIndex++];
3315 return (Elf_Addr)entry;
3319 #ifdef ELF_FUNCTION_DESC
3325 static FunctionDesc functionTable[FUNCTION_TABLE_SIZE];
3326 static unsigned int functionTableIndex;
3329 allocateFunctionDesc(Elf_Addr target)
3331 FunctionDesc *entry;
3333 if (functionTableIndex >= FUNCTION_TABLE_SIZE)
3334 barf("Function table overflow");
3336 entry = &functionTable[functionTableIndex++];
3338 entry->gp = (Elf_Addr)gp_val;
3339 return (Elf_Addr)entry;
3343 copyFunctionDesc(Elf_Addr target)
3345 FunctionDesc *olddesc = (FunctionDesc *)target;
3346 FunctionDesc *newdesc;
3348 newdesc = (FunctionDesc *)allocateFunctionDesc(olddesc->ip);
3349 newdesc->gp = olddesc->gp;
3350 return (Elf_Addr)newdesc;
3357 unsigned char code[sizeof(plt_code)];
3361 allocatePLTEntry(Elf_Addr target, ObjectCode *oc)
3363 PLTEntry *plt = (PLTEntry *)oc->plt;
3366 if (oc->pltIndex >= PLT_SIZE)
3367 barf("Procedure table overflow");
3369 entry = &plt[oc->pltIndex++];
3370 memcpy(entry->code, plt_code, sizeof(entry->code));
3371 PLT_RELOC(entry->code, target);
3372 return (Elf_Addr)entry;
3378 return (PLT_SIZE * sizeof(PLTEntry));
3384 * Generic ELF functions
3388 findElfSection ( void* objImage, Elf_Word sh_type )
3390 char* ehdrC = (char*)objImage;
3391 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3392 Elf_Shdr* shdr = (Elf_Shdr*)(ehdrC + ehdr->e_shoff);
3393 char* sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
3397 for (i = 0; i < ehdr->e_shnum; i++) {
3398 if (shdr[i].sh_type == sh_type
3399 /* Ignore the section header's string table. */
3400 && i != ehdr->e_shstrndx
3401 /* Ignore string tables named .stabstr, as they contain
3403 && 0 != memcmp(".stabstr", sh_strtab + shdr[i].sh_name, 8)
3405 ptr = ehdrC + shdr[i].sh_offset;
3413 ocVerifyImage_ELF ( ObjectCode* oc )
3417 int i, j, nent, nstrtab, nsymtabs;
3421 char* ehdrC = (char*)(oc->image);
3422 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3424 if (ehdr->e_ident[EI_MAG0] != ELFMAG0 ||
3425 ehdr->e_ident[EI_MAG1] != ELFMAG1 ||
3426 ehdr->e_ident[EI_MAG2] != ELFMAG2 ||
3427 ehdr->e_ident[EI_MAG3] != ELFMAG3) {
3428 errorBelch("%s: not an ELF object", oc->fileName);
3432 if (ehdr->e_ident[EI_CLASS] != ELFCLASS) {
3433 errorBelch("%s: unsupported ELF format", oc->fileName);
3437 if (ehdr->e_ident[EI_DATA] == ELFDATA2LSB) {
3438 IF_DEBUG(linker,debugBelch( "Is little-endian\n" ));
3440 if (ehdr->e_ident[EI_DATA] == ELFDATA2MSB) {
3441 IF_DEBUG(linker,debugBelch( "Is big-endian\n" ));
3443 errorBelch("%s: unknown endiannness", oc->fileName);
3447 if (ehdr->e_type != ET_REL) {
3448 errorBelch("%s: not a relocatable object (.o) file", oc->fileName);
3451 IF_DEBUG(linker, debugBelch( "Is a relocatable object (.o) file\n" ));
3453 IF_DEBUG(linker,debugBelch( "Architecture is " ));
3454 switch (ehdr->e_machine) {
3455 case EM_386: IF_DEBUG(linker,debugBelch( "x86" )); break;
3456 #ifdef EM_SPARC32PLUS
3457 case EM_SPARC32PLUS:
3459 case EM_SPARC: IF_DEBUG(linker,debugBelch( "sparc" )); break;
3461 case EM_IA_64: IF_DEBUG(linker,debugBelch( "ia64" )); break;
3463 case EM_PPC: IF_DEBUG(linker,debugBelch( "powerpc32" )); break;
3465 case EM_X86_64: IF_DEBUG(linker,debugBelch( "x86_64" )); break;
3466 #elif defined(EM_AMD64)
3467 case EM_AMD64: IF_DEBUG(linker,debugBelch( "amd64" )); break;
3469 default: IF_DEBUG(linker,debugBelch( "unknown" ));
3470 errorBelch("%s: unknown architecture (e_machine == %d)"
3471 , oc->fileName, ehdr->e_machine);
3475 IF_DEBUG(linker,debugBelch(
3476 "\nSection header table: start %ld, n_entries %d, ent_size %d\n",
3477 (long)ehdr->e_shoff, ehdr->e_shnum, ehdr->e_shentsize ));
3479 ASSERT (ehdr->e_shentsize == sizeof(Elf_Shdr));
3481 shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
3483 if (ehdr->e_shstrndx == SHN_UNDEF) {
3484 errorBelch("%s: no section header string table", oc->fileName);
3487 IF_DEBUG(linker,debugBelch( "Section header string table is section %d\n",
3489 sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
3492 for (i = 0; i < ehdr->e_shnum; i++) {
3493 IF_DEBUG(linker,debugBelch("%2d: ", i ));
3494 IF_DEBUG(linker,debugBelch("type=%2d ", (int)shdr[i].sh_type ));
3495 IF_DEBUG(linker,debugBelch("size=%4d ", (int)shdr[i].sh_size ));
3496 IF_DEBUG(linker,debugBelch("offs=%4d ", (int)shdr[i].sh_offset ));
3497 IF_DEBUG(linker,debugBelch(" (%p .. %p) ",
3498 ehdrC + shdr[i].sh_offset,
3499 ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1));
3501 if (shdr[i].sh_type == SHT_REL) {
3502 IF_DEBUG(linker,debugBelch("Rel " ));
3503 } else if (shdr[i].sh_type == SHT_RELA) {
3504 IF_DEBUG(linker,debugBelch("RelA " ));
3506 IF_DEBUG(linker,debugBelch(" "));
3509 IF_DEBUG(linker,debugBelch("sname=%s\n", sh_strtab + shdr[i].sh_name ));
3513 IF_DEBUG(linker,debugBelch( "\nString tables" ));
3516 for (i = 0; i < ehdr->e_shnum; i++) {
3517 if (shdr[i].sh_type == SHT_STRTAB
3518 /* Ignore the section header's string table. */
3519 && i != ehdr->e_shstrndx
3520 /* Ignore string tables named .stabstr, as they contain
3522 && 0 != memcmp(".stabstr", sh_strtab + shdr[i].sh_name, 8)
3524 IF_DEBUG(linker,debugBelch(" section %d is a normal string table", i ));
3525 strtab = ehdrC + shdr[i].sh_offset;
3530 errorBelch("%s: no string tables, or too many", oc->fileName);
3535 IF_DEBUG(linker,debugBelch( "\nSymbol tables" ));
3536 for (i = 0; i < ehdr->e_shnum; i++) {
3537 if (shdr[i].sh_type != SHT_SYMTAB) continue;
3538 IF_DEBUG(linker,debugBelch( "section %d is a symbol table\n", i ));
3540 stab = (Elf_Sym*) (ehdrC + shdr[i].sh_offset);
3541 nent = shdr[i].sh_size / sizeof(Elf_Sym);
3542 IF_DEBUG(linker,debugBelch( " number of entries is apparently %d (%ld rem)\n",
3544 (long)shdr[i].sh_size % sizeof(Elf_Sym)
3546 if (0 != shdr[i].sh_size % sizeof(Elf_Sym)) {
3547 errorBelch("%s: non-integral number of symbol table entries", oc->fileName);
3550 for (j = 0; j < nent; j++) {
3551 IF_DEBUG(linker,debugBelch(" %2d ", j ));
3552 IF_DEBUG(linker,debugBelch(" sec=%-5d size=%-3d val=%5p ",
3553 (int)stab[j].st_shndx,
3554 (int)stab[j].st_size,
3555 (char*)stab[j].st_value ));
3557 IF_DEBUG(linker,debugBelch("type=" ));
3558 switch (ELF_ST_TYPE(stab[j].st_info)) {
3559 case STT_NOTYPE: IF_DEBUG(linker,debugBelch("notype " )); break;
3560 case STT_OBJECT: IF_DEBUG(linker,debugBelch("object " )); break;
3561 case STT_FUNC : IF_DEBUG(linker,debugBelch("func " )); break;
3562 case STT_SECTION: IF_DEBUG(linker,debugBelch("section" )); break;
3563 case STT_FILE: IF_DEBUG(linker,debugBelch("file " )); break;
3564 default: IF_DEBUG(linker,debugBelch("? " )); break;
3566 IF_DEBUG(linker,debugBelch(" " ));
3568 IF_DEBUG(linker,debugBelch("bind=" ));
3569 switch (ELF_ST_BIND(stab[j].st_info)) {
3570 case STB_LOCAL : IF_DEBUG(linker,debugBelch("local " )); break;
3571 case STB_GLOBAL: IF_DEBUG(linker,debugBelch("global" )); break;
3572 case STB_WEAK : IF_DEBUG(linker,debugBelch("weak " )); break;
3573 default: IF_DEBUG(linker,debugBelch("? " )); break;
3575 IF_DEBUG(linker,debugBelch(" " ));
3577 IF_DEBUG(linker,debugBelch("name=%s\n", strtab + stab[j].st_name ));
3581 if (nsymtabs == 0) {
3582 errorBelch("%s: didn't find any symbol tables", oc->fileName);
3589 static int getSectionKind_ELF( Elf_Shdr *hdr, int *is_bss )
3593 if (hdr->sh_type == SHT_PROGBITS
3594 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_EXECINSTR)) {
3595 /* .text-style section */
3596 return SECTIONKIND_CODE_OR_RODATA;
3599 if (hdr->sh_type == SHT_PROGBITS
3600 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_WRITE)) {
3601 /* .data-style section */
3602 return SECTIONKIND_RWDATA;
3605 if (hdr->sh_type == SHT_PROGBITS
3606 && (hdr->sh_flags & SHF_ALLOC) && !(hdr->sh_flags & SHF_WRITE)) {
3607 /* .rodata-style section */
3608 return SECTIONKIND_CODE_OR_RODATA;
3611 if (hdr->sh_type == SHT_NOBITS
3612 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_WRITE)) {
3613 /* .bss-style section */
3615 return SECTIONKIND_RWDATA;
3618 return SECTIONKIND_OTHER;
3623 ocGetNames_ELF ( ObjectCode* oc )
3628 char* ehdrC = (char*)(oc->image);
3629 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3630 char* strtab = findElfSection ( ehdrC, SHT_STRTAB );
3631 Elf_Shdr* shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
3633 ASSERT(symhash != NULL);
3636 errorBelch("%s: no strtab", oc->fileName);
3641 for (i = 0; i < ehdr->e_shnum; i++) {
3642 /* Figure out what kind of section it is. Logic derived from
3643 Figure 1.14 ("Special Sections") of the ELF document
3644 ("Portable Formats Specification, Version 1.1"). */
3646 SectionKind kind = getSectionKind_ELF(&shdr[i], &is_bss);
3648 if (is_bss && shdr[i].sh_size > 0) {
3649 /* This is a non-empty .bss section. Allocate zeroed space for
3650 it, and set its .sh_offset field such that
3651 ehdrC + .sh_offset == addr_of_zeroed_space. */
3652 char* zspace = stgCallocBytes(1, shdr[i].sh_size,
3653 "ocGetNames_ELF(BSS)");
3654 shdr[i].sh_offset = ((char*)zspace) - ((char*)ehdrC);
3656 debugBelch("BSS section at 0x%x, size %d\n",
3657 zspace, shdr[i].sh_size);
3661 /* fill in the section info */
3662 if (kind != SECTIONKIND_OTHER && shdr[i].sh_size > 0) {
3663 addProddableBlock(oc, ehdrC + shdr[i].sh_offset, shdr[i].sh_size);
3664 addSection(oc, kind, ehdrC + shdr[i].sh_offset,
3665 ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1);
3668 if (shdr[i].sh_type != SHT_SYMTAB) continue;
3670 /* copy stuff into this module's object symbol table */
3671 stab = (Elf_Sym*) (ehdrC + shdr[i].sh_offset);
3672 nent = shdr[i].sh_size / sizeof(Elf_Sym);
3674 oc->n_symbols = nent;
3675 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
3676 "ocGetNames_ELF(oc->symbols)");
3678 for (j = 0; j < nent; j++) {
3680 char isLocal = FALSE; /* avoids uninit-var warning */
3682 char* nm = strtab + stab[j].st_name;
3683 int secno = stab[j].st_shndx;
3685 /* Figure out if we want to add it; if so, set ad to its
3686 address. Otherwise leave ad == NULL. */
3688 if (secno == SHN_COMMON) {
3690 ad = stgCallocBytes(1, stab[j].st_size, "ocGetNames_ELF(COMMON)");
3692 debugBelch("COMMON symbol, size %d name %s\n",
3693 stab[j].st_size, nm);
3695 /* Pointless to do addProddableBlock() for this area,
3696 since the linker should never poke around in it. */
3699 if ( ( ELF_ST_BIND(stab[j].st_info)==STB_GLOBAL
3700 || ELF_ST_BIND(stab[j].st_info)==STB_LOCAL
3702 /* and not an undefined symbol */
3703 && stab[j].st_shndx != SHN_UNDEF
3704 /* and not in a "special section" */
3705 && stab[j].st_shndx < SHN_LORESERVE
3707 /* and it's a not a section or string table or anything silly */
3708 ( ELF_ST_TYPE(stab[j].st_info)==STT_FUNC ||
3709 ELF_ST_TYPE(stab[j].st_info)==STT_OBJECT ||
3710 ELF_ST_TYPE(stab[j].st_info)==STT_NOTYPE
3713 /* Section 0 is the undefined section, hence > and not >=. */
3714 ASSERT(secno > 0 && secno < ehdr->e_shnum);
3716 if (shdr[secno].sh_type == SHT_NOBITS) {
3717 debugBelch(" BSS symbol, size %d off %d name %s\n",
3718 stab[j].st_size, stab[j].st_value, nm);
3721 ad = ehdrC + shdr[ secno ].sh_offset + stab[j].st_value;
3722 if (ELF_ST_BIND(stab[j].st_info)==STB_LOCAL) {
3725 #ifdef ELF_FUNCTION_DESC
3726 /* dlsym() and the initialisation table both give us function
3727 * descriptors, so to be consistent we store function descriptors
3728 * in the symbol table */
3729 if (ELF_ST_TYPE(stab[j].st_info) == STT_FUNC)
3730 ad = (char *)allocateFunctionDesc((Elf_Addr)ad);
3732 IF_DEBUG(linker,debugBelch( "addOTabName(GLOB): %10p %s %s\n",
3733 ad, oc->fileName, nm ));
3738 /* And the decision is ... */
3742 oc->symbols[j] = nm;
3745 /* Ignore entirely. */
3747 ghciInsertStrHashTable(oc->fileName, symhash, nm, ad);
3751 IF_DEBUG(linker,debugBelch( "skipping `%s'\n",
3752 strtab + stab[j].st_name ));
3755 "skipping bind = %d, type = %d, shndx = %d `%s'\n",
3756 (int)ELF_ST_BIND(stab[j].st_info),
3757 (int)ELF_ST_TYPE(stab[j].st_info),
3758 (int)stab[j].st_shndx,
3759 strtab + stab[j].st_name
3762 oc->symbols[j] = NULL;
3771 /* Do ELF relocations which lack an explicit addend. All x86-linux
3772 relocations appear to be of this form. */
3774 do_Elf_Rel_relocations ( ObjectCode* oc, char* ehdrC,
3775 Elf_Shdr* shdr, int shnum,
3776 Elf_Sym* stab, char* strtab )
3781 Elf_Rel* rtab = (Elf_Rel*) (ehdrC + shdr[shnum].sh_offset);
3782 int nent = shdr[shnum].sh_size / sizeof(Elf_Rel);
3783 int target_shndx = shdr[shnum].sh_info;
3784 int symtab_shndx = shdr[shnum].sh_link;
3786 stab = (Elf_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
3787 targ = (Elf_Word*)(ehdrC + shdr[ target_shndx ].sh_offset);
3788 IF_DEBUG(linker,debugBelch( "relocations for section %d using symtab %d\n",
3789 target_shndx, symtab_shndx ));
3791 /* Skip sections that we're not interested in. */
3794 SectionKind kind = getSectionKind_ELF(&shdr[target_shndx], &is_bss);
3795 if (kind == SECTIONKIND_OTHER) {
3796 IF_DEBUG(linker,debugBelch( "skipping (target section not loaded)"));
3801 for (j = 0; j < nent; j++) {
3802 Elf_Addr offset = rtab[j].r_offset;
3803 Elf_Addr info = rtab[j].r_info;
3805 Elf_Addr P = ((Elf_Addr)targ) + offset;
3806 Elf_Word* pP = (Elf_Word*)P;
3811 StgStablePtr stablePtr;
3814 IF_DEBUG(linker,debugBelch( "Rel entry %3d is raw(%6p %6p)",
3815 j, (void*)offset, (void*)info ));
3817 IF_DEBUG(linker,debugBelch( " ZERO" ));
3820 Elf_Sym sym = stab[ELF_R_SYM(info)];
3821 /* First see if it is a local symbol. */
3822 if (ELF_ST_BIND(sym.st_info) == STB_LOCAL) {
3823 /* Yes, so we can get the address directly from the ELF symbol
3825 symbol = sym.st_name==0 ? "(noname)" : strtab+sym.st_name;
3827 (ehdrC + shdr[ sym.st_shndx ].sh_offset
3828 + stab[ELF_R_SYM(info)].st_value);
3831 symbol = strtab + sym.st_name;
3832 stablePtr = (StgStablePtr)lookupHashTable(stablehash, (StgWord)symbol);
3833 if (NULL == stablePtr) {
3834 /* No, so look up the name in our global table. */
3835 S_tmp = lookupSymbol( symbol );
3836 S = (Elf_Addr)S_tmp;
3838 stableVal = deRefStablePtr( stablePtr );
3840 S = (Elf_Addr)S_tmp;
3844 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3847 IF_DEBUG(linker,debugBelch( "`%s' resolves to %p\n", symbol, (void*)S ));
3850 IF_DEBUG(linker,debugBelch( "Reloc: P = %p S = %p A = %p\n",
3851 (void*)P, (void*)S, (void*)A ));
3852 checkProddableBlock ( oc, pP );
3856 switch (ELF_R_TYPE(info)) {
3857 # ifdef i386_HOST_ARCH
3858 case R_386_32: *pP = value; break;
3859 case R_386_PC32: *pP = value - P; break;
3862 errorBelch("%s: unhandled ELF relocation(Rel) type %lu\n",
3863 oc->fileName, (lnat)ELF_R_TYPE(info));
3871 /* Do ELF relocations for which explicit addends are supplied.
3872 sparc-solaris relocations appear to be of this form. */
3874 do_Elf_Rela_relocations ( ObjectCode* oc, char* ehdrC,
3875 Elf_Shdr* shdr, int shnum,
3876 Elf_Sym* stab, char* strtab )
3879 char *symbol = NULL;
3881 Elf_Rela* rtab = (Elf_Rela*) (ehdrC + shdr[shnum].sh_offset);
3882 int nent = shdr[shnum].sh_size / sizeof(Elf_Rela);
3883 int target_shndx = shdr[shnum].sh_info;
3884 int symtab_shndx = shdr[shnum].sh_link;
3886 stab = (Elf_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
3887 targ = (Elf_Addr) (ehdrC + shdr[ target_shndx ].sh_offset);
3888 IF_DEBUG(linker,debugBelch( "relocations for section %d using symtab %d\n",
3889 target_shndx, symtab_shndx ));
3891 for (j = 0; j < nent; j++) {
3892 #if defined(DEBUG) || defined(sparc_HOST_ARCH) || defined(ia64_HOST_ARCH) || defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
3893 /* This #ifdef only serves to avoid unused-var warnings. */
3894 Elf_Addr offset = rtab[j].r_offset;
3895 Elf_Addr P = targ + offset;
3897 Elf_Addr info = rtab[j].r_info;
3898 Elf_Addr A = rtab[j].r_addend;
3902 # if defined(sparc_HOST_ARCH)
3903 Elf_Word* pP = (Elf_Word*)P;
3905 # elif defined(powerpc_HOST_ARCH)
3909 IF_DEBUG(linker,debugBelch( "Rel entry %3d is raw(%6p %6p %6p) ",
3910 j, (void*)offset, (void*)info,
3913 IF_DEBUG(linker,debugBelch( " ZERO" ));
3916 Elf_Sym sym = stab[ELF_R_SYM(info)];
3917 /* First see if it is a local symbol. */
3918 if (ELF_ST_BIND(sym.st_info) == STB_LOCAL) {
3919 /* Yes, so we can get the address directly from the ELF symbol
3921 symbol = sym.st_name==0 ? "(noname)" : strtab+sym.st_name;
3923 (ehdrC + shdr[ sym.st_shndx ].sh_offset
3924 + stab[ELF_R_SYM(info)].st_value);
3925 #ifdef ELF_FUNCTION_DESC
3926 /* Make a function descriptor for this function */
3927 if (S && ELF_ST_TYPE(sym.st_info) == STT_FUNC) {
3928 S = allocateFunctionDesc(S + A);
3933 /* No, so look up the name in our global table. */
3934 symbol = strtab + sym.st_name;
3935 S_tmp = lookupSymbol( symbol );
3936 S = (Elf_Addr)S_tmp;
3938 #ifdef ELF_FUNCTION_DESC
3939 /* If a function, already a function descriptor - we would
3940 have to copy it to add an offset. */
3941 if (S && (ELF_ST_TYPE(sym.st_info) == STT_FUNC) && (A != 0))
3942 errorBelch("%s: function %s with addend %p", oc->fileName, symbol, (void *)A);
3946 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3949 IF_DEBUG(linker,debugBelch( "`%s' resolves to %p", symbol, (void*)S ));
3952 IF_DEBUG(linker,debugBelch("Reloc: P = %p S = %p A = %p\n",
3953 (void*)P, (void*)S, (void*)A ));
3954 /* checkProddableBlock ( oc, (void*)P ); */
3958 switch (ELF_R_TYPE(info)) {
3959 # if defined(sparc_HOST_ARCH)
3960 case R_SPARC_WDISP30:
3961 w1 = *pP & 0xC0000000;
3962 w2 = (Elf_Word)((value - P) >> 2);
3963 ASSERT((w2 & 0xC0000000) == 0);
3968 w1 = *pP & 0xFFC00000;
3969 w2 = (Elf_Word)(value >> 10);
3970 ASSERT((w2 & 0xFFC00000) == 0);
3976 w2 = (Elf_Word)(value & 0x3FF);
3977 ASSERT((w2 & ~0x3FF) == 0);
3982 /* According to the Sun documentation:
3984 This relocation type resembles R_SPARC_32, except it refers to an
3985 unaligned word. That is, the word to be relocated must be treated
3986 as four separate bytes with arbitrary alignment, not as a word
3987 aligned according to the architecture requirements.
3990 w2 = (Elf_Word)value;
3992 // SPARC doesn't do misaligned writes of 32 bit words,
3993 // so we have to do this one byte-at-a-time.
3994 char *pPc = (char*)pP;
3995 pPc[0] = (char) ((Elf_Word)(w2 & 0xff000000) >> 24);
3996 pPc[1] = (char) ((Elf_Word)(w2 & 0x00ff0000) >> 16);
3997 pPc[2] = (char) ((Elf_Word)(w2 & 0x0000ff00) >> 8);
3998 pPc[3] = (char) ((Elf_Word)(w2 & 0x000000ff));
4002 w2 = (Elf_Word)value;
4005 # elif defined(powerpc_HOST_ARCH)
4006 case R_PPC_ADDR16_LO:
4007 *(Elf32_Half*) P = value;
4010 case R_PPC_ADDR16_HI:
4011 *(Elf32_Half*) P = value >> 16;
4014 case R_PPC_ADDR16_HA:
4015 *(Elf32_Half*) P = (value + 0x8000) >> 16;
4019 *(Elf32_Word *) P = value;
4023 *(Elf32_Word *) P = value - P;
4029 if( delta << 6 >> 6 != delta )
4031 value = (Elf_Addr) (&makeSymbolExtra( oc, ELF_R_SYM(info), value )
4035 if( value == 0 || delta << 6 >> 6 != delta )
4037 barf( "Unable to make SymbolExtra for #%d",
4043 *(Elf_Word *) P = (*(Elf_Word *) P & 0xfc000003)
4044 | (delta & 0x3fffffc);
4048 #if x86_64_HOST_ARCH
4050 *(Elf64_Xword *)P = value;
4055 #if defined(ALWAYS_PIC)
4056 barf("R_X86_64_PC32 relocation, but ALWAYS_PIC.");
4058 StgInt64 off = value - P;
4059 if (off >= 0x7fffffffL || off < -0x80000000L) {
4060 #if X86_64_ELF_NONPIC_HACK
4061 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4063 off = pltAddress + A - P;
4065 barf("R_X86_64_PC32 relocation out of range: %s = %p\nRecompile %s with -fPIC.",
4066 symbol, off, oc->fileName );
4069 *(Elf64_Word *)P = (Elf64_Word)off;
4076 StgInt64 off = value - P;
4077 *(Elf64_Word *)P = (Elf64_Word)off;
4082 #if defined(ALWAYS_PIC)
4083 barf("R_X86_64_32 relocation, but ALWAYS_PIC.");
4085 if (value >= 0x7fffffffL) {
4086 #if X86_64_ELF_NONPIC_HACK
4087 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4089 value = pltAddress + A;
4091 barf("R_X86_64_32 relocation out of range: %s = %p\nRecompile %s with -fPIC.",
4092 symbol, value, oc->fileName );
4095 *(Elf64_Word *)P = (Elf64_Word)value;
4100 #if defined(ALWAYS_PIC)
4101 barf("R_X86_64_32S relocation, but ALWAYS_PIC.");
4103 if ((StgInt64)value > 0x7fffffffL || (StgInt64)value < -0x80000000L) {
4104 #if X86_64_ELF_NONPIC_HACK
4105 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4107 value = pltAddress + A;
4109 barf("R_X86_64_32S relocation out of range: %s = %p\nRecompile %s with -fPIC.",
4110 symbol, value, oc->fileName );
4113 *(Elf64_Sword *)P = (Elf64_Sword)value;
4117 case R_X86_64_GOTPCREL:
4119 StgInt64 gotAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)->addr;
4120 StgInt64 off = gotAddress + A - P;
4121 *(Elf64_Word *)P = (Elf64_Word)off;
4125 case R_X86_64_PLT32:
4127 #if defined(ALWAYS_PIC)
4128 barf("R_X86_64_PLT32 relocation, but ALWAYS_PIC.");
4130 StgInt64 off = value - P;
4131 if (off >= 0x7fffffffL || off < -0x80000000L) {
4132 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4134 off = pltAddress + A - P;
4136 *(Elf64_Word *)P = (Elf64_Word)off;
4143 errorBelch("%s: unhandled ELF relocation(RelA) type %lu\n",
4144 oc->fileName, (lnat)ELF_R_TYPE(info));
4153 ocResolve_ELF ( ObjectCode* oc )
4157 Elf_Sym* stab = NULL;
4158 char* ehdrC = (char*)(oc->image);
4159 Elf_Ehdr* ehdr = (Elf_Ehdr*) ehdrC;
4160 Elf_Shdr* shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
4162 /* first find "the" symbol table */
4163 stab = (Elf_Sym*) findElfSection ( ehdrC, SHT_SYMTAB );
4165 /* also go find the string table */
4166 strtab = findElfSection ( ehdrC, SHT_STRTAB );
4168 if (stab == NULL || strtab == NULL) {
4169 errorBelch("%s: can't find string or symbol table", oc->fileName);
4173 /* Process the relocation sections. */
4174 for (shnum = 0; shnum < ehdr->e_shnum; shnum++) {
4175 if (shdr[shnum].sh_type == SHT_REL) {
4176 ok = do_Elf_Rel_relocations ( oc, ehdrC, shdr,
4177 shnum, stab, strtab );
4181 if (shdr[shnum].sh_type == SHT_RELA) {
4182 ok = do_Elf_Rela_relocations ( oc, ehdrC, shdr,
4183 shnum, stab, strtab );
4188 #if defined(powerpc_HOST_ARCH)
4189 ocFlushInstructionCache( oc );
4196 * PowerPC & X86_64 ELF specifics
4199 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
4201 static int ocAllocateSymbolExtras_ELF( ObjectCode *oc )
4207 ehdr = (Elf_Ehdr *) oc->image;
4208 shdr = (Elf_Shdr *) ( ((char *)oc->image) + ehdr->e_shoff );
4210 for( i = 0; i < ehdr->e_shnum; i++ )
4211 if( shdr[i].sh_type == SHT_SYMTAB )
4214 if( i == ehdr->e_shnum )
4216 errorBelch( "This ELF file contains no symtab" );
4220 if( shdr[i].sh_entsize != sizeof( Elf_Sym ) )
4222 errorBelch( "The entry size (%d) of the symtab isn't %d\n",
4223 (int) shdr[i].sh_entsize, (int) sizeof( Elf_Sym ) );
4228 return ocAllocateSymbolExtras( oc, shdr[i].sh_size / sizeof( Elf_Sym ), 0 );
4231 #endif /* powerpc */
4235 /* --------------------------------------------------------------------------
4237 * ------------------------------------------------------------------------*/
4239 #if defined(OBJFORMAT_MACHO)
4242 Support for MachO linking on Darwin/MacOS X
4243 by Wolfgang Thaller (wolfgang.thaller@gmx.net)
4245 I hereby formally apologize for the hackish nature of this code.
4246 Things that need to be done:
4247 *) implement ocVerifyImage_MachO
4248 *) add still more sanity checks.
4251 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
4252 #define mach_header mach_header_64
4253 #define segment_command segment_command_64
4254 #define section section_64
4255 #define nlist nlist_64
4258 #ifdef powerpc_HOST_ARCH
4259 static int ocAllocateSymbolExtras_MachO(ObjectCode* oc)
4261 struct mach_header *header = (struct mach_header *) oc->image;
4262 struct load_command *lc = (struct load_command *) (header + 1);
4265 for( i = 0; i < header->ncmds; i++ )
4267 if( lc->cmd == LC_SYMTAB )
4269 // Find out the first and last undefined external
4270 // symbol, so we don't have to allocate too many
4272 struct symtab_command *symLC = (struct symtab_command *) lc;
4273 unsigned min = symLC->nsyms, max = 0;
4274 struct nlist *nlist =
4275 symLC ? (struct nlist*) ((char*) oc->image + symLC->symoff)
4277 for(i=0;i<symLC->nsyms;i++)
4279 if(nlist[i].n_type & N_STAB)
4281 else if(nlist[i].n_type & N_EXT)
4283 if((nlist[i].n_type & N_TYPE) == N_UNDF
4284 && (nlist[i].n_value == 0))
4294 return ocAllocateSymbolExtras(oc, max - min + 1, min);
4299 lc = (struct load_command *) ( ((char *)lc) + lc->cmdsize );
4301 return ocAllocateSymbolExtras(oc,0,0);
4304 #ifdef x86_64_HOST_ARCH
4305 static int ocAllocateSymbolExtras_MachO(ObjectCode* oc)
4307 struct mach_header *header = (struct mach_header *) oc->image;
4308 struct load_command *lc = (struct load_command *) (header + 1);
4311 for( i = 0; i < header->ncmds; i++ )
4313 if( lc->cmd == LC_SYMTAB )
4315 // Just allocate one entry for every symbol
4316 struct symtab_command *symLC = (struct symtab_command *) lc;
4318 return ocAllocateSymbolExtras(oc, symLC->nsyms, 0);
4321 lc = (struct load_command *) ( ((char *)lc) + lc->cmdsize );
4323 return ocAllocateSymbolExtras(oc,0,0);
4327 static int ocVerifyImage_MachO(ObjectCode* oc)
4329 char *image = (char*) oc->image;
4330 struct mach_header *header = (struct mach_header*) image;
4332 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
4333 if(header->magic != MH_MAGIC_64) {
4334 errorBelch("%s: Bad magic. Expected: %08x, got: %08x.\n",
4335 oc->fileName, MH_MAGIC_64, header->magic);
4339 if(header->magic != MH_MAGIC) {
4340 errorBelch("%s: Bad magic. Expected: %08x, got: %08x.\n",
4341 oc->fileName, MH_MAGIC, header->magic);
4345 // FIXME: do some more verifying here
4349 static int resolveImports(
4352 struct symtab_command *symLC,
4353 struct section *sect, // ptr to lazy or non-lazy symbol pointer section
4354 unsigned long *indirectSyms,
4355 struct nlist *nlist)
4358 size_t itemSize = 4;
4361 int isJumpTable = 0;
4362 if(!strcmp(sect->sectname,"__jump_table"))
4366 ASSERT(sect->reserved2 == itemSize);
4370 for(i=0; i*itemSize < sect->size;i++)
4372 // according to otool, reserved1 contains the first index into the indirect symbol table
4373 struct nlist *symbol = &nlist[indirectSyms[sect->reserved1+i]];
4374 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4377 if((symbol->n_type & N_TYPE) == N_UNDF
4378 && (symbol->n_type & N_EXT) && (symbol->n_value != 0))
4379 addr = (void*) (symbol->n_value);
4381 addr = lookupSymbol(nm);
4384 errorBelch("\n%s: unknown symbol `%s'", oc->fileName, nm);
4392 checkProddableBlock(oc,image + sect->offset + i*itemSize);
4393 *(image + sect->offset + i*itemSize) = 0xe9; // jmp
4394 *(unsigned*)(image + sect->offset + i*itemSize + 1)
4395 = (char*)addr - (image + sect->offset + i*itemSize + 5);
4400 checkProddableBlock(oc,((void**)(image + sect->offset)) + i);
4401 ((void**)(image + sect->offset))[i] = addr;
4408 static unsigned long relocateAddress(
4411 struct section* sections,
4412 unsigned long address)
4415 for(i = 0; i < nSections; i++)
4417 if(sections[i].addr <= address
4418 && address < sections[i].addr + sections[i].size)
4420 return (unsigned long)oc->image
4421 + sections[i].offset + address - sections[i].addr;
4424 barf("Invalid Mach-O file:"
4425 "Address out of bounds while relocating object file");
4429 static int relocateSection(
4432 struct symtab_command *symLC, struct nlist *nlist,
4433 int nSections, struct section* sections, struct section *sect)
4435 struct relocation_info *relocs;
4438 if(!strcmp(sect->sectname,"__la_symbol_ptr"))
4440 else if(!strcmp(sect->sectname,"__nl_symbol_ptr"))
4442 else if(!strcmp(sect->sectname,"__la_sym_ptr2"))
4444 else if(!strcmp(sect->sectname,"__la_sym_ptr3"))
4448 relocs = (struct relocation_info*) (image + sect->reloff);
4452 #ifdef x86_64_HOST_ARCH
4453 struct relocation_info *reloc = &relocs[i];
4455 char *thingPtr = image + sect->offset + reloc->r_address;
4457 /* We shouldn't need to initialise this, but gcc on OS X 64 bit
4458 complains that it may be used uninitialized if we don't */
4461 int type = reloc->r_type;
4463 checkProddableBlock(oc,thingPtr);
4464 switch(reloc->r_length)
4467 thing = *(uint8_t*)thingPtr;
4468 baseValue = (uint64_t)thingPtr + 1;
4471 thing = *(uint16_t*)thingPtr;
4472 baseValue = (uint64_t)thingPtr + 2;
4475 thing = *(uint32_t*)thingPtr;
4476 baseValue = (uint64_t)thingPtr + 4;
4479 thing = *(uint64_t*)thingPtr;
4480 baseValue = (uint64_t)thingPtr + 8;
4483 barf("Unknown size.");
4486 if(type == X86_64_RELOC_GOT
4487 || type == X86_64_RELOC_GOT_LOAD)
4489 ASSERT(reloc->r_extern);
4490 value = (uint64_t) &makeSymbolExtra(oc, reloc->r_symbolnum, value)->addr;
4492 type = X86_64_RELOC_SIGNED;
4494 else if(reloc->r_extern)
4496 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4497 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4498 if(symbol->n_value == 0)
4499 value = (uint64_t) lookupSymbol(nm);
4501 value = relocateAddress(oc, nSections, sections,
4506 value = sections[reloc->r_symbolnum-1].offset
4507 - sections[reloc->r_symbolnum-1].addr
4511 if(type == X86_64_RELOC_BRANCH)
4513 if((int32_t)(value - baseValue) != (int64_t)(value - baseValue))
4515 ASSERT(reloc->r_extern);
4516 value = (uint64_t) &makeSymbolExtra(oc, reloc->r_symbolnum, value)
4519 ASSERT((int32_t)(value - baseValue) == (int64_t)(value - baseValue));
4520 type = X86_64_RELOC_SIGNED;
4525 case X86_64_RELOC_UNSIGNED:
4526 ASSERT(!reloc->r_pcrel);
4529 case X86_64_RELOC_SIGNED:
4530 case X86_64_RELOC_SIGNED_1:
4531 case X86_64_RELOC_SIGNED_2:
4532 case X86_64_RELOC_SIGNED_4:
4533 ASSERT(reloc->r_pcrel);
4534 thing += value - baseValue;
4536 case X86_64_RELOC_SUBTRACTOR:
4537 ASSERT(!reloc->r_pcrel);
4541 barf("unkown relocation");
4544 switch(reloc->r_length)
4547 *(uint8_t*)thingPtr = thing;
4550 *(uint16_t*)thingPtr = thing;
4553 *(uint32_t*)thingPtr = thing;
4556 *(uint64_t*)thingPtr = thing;
4560 if(relocs[i].r_address & R_SCATTERED)
4562 struct scattered_relocation_info *scat =
4563 (struct scattered_relocation_info*) &relocs[i];
4567 if(scat->r_length == 2)
4569 unsigned long word = 0;
4570 unsigned long* wordPtr = (unsigned long*) (image + sect->offset + scat->r_address);
4571 checkProddableBlock(oc,wordPtr);
4573 // Note on relocation types:
4574 // i386 uses the GENERIC_RELOC_* types,
4575 // while ppc uses special PPC_RELOC_* types.
4576 // *_RELOC_VANILLA and *_RELOC_PAIR have the same value
4577 // in both cases, all others are different.
4578 // Therefore, we use GENERIC_RELOC_VANILLA
4579 // and GENERIC_RELOC_PAIR instead of the PPC variants,
4580 // and use #ifdefs for the other types.
4582 // Step 1: Figure out what the relocated value should be
4583 if(scat->r_type == GENERIC_RELOC_VANILLA)
4585 word = *wordPtr + (unsigned long) relocateAddress(
4592 #ifdef powerpc_HOST_ARCH
4593 else if(scat->r_type == PPC_RELOC_SECTDIFF
4594 || scat->r_type == PPC_RELOC_LO16_SECTDIFF
4595 || scat->r_type == PPC_RELOC_HI16_SECTDIFF
4596 || scat->r_type == PPC_RELOC_HA16_SECTDIFF
4597 || scat->r_type == PPC_RELOC_LOCAL_SECTDIFF)
4599 else if(scat->r_type == GENERIC_RELOC_SECTDIFF
4600 || scat->r_type == GENERIC_RELOC_LOCAL_SECTDIFF)
4603 struct scattered_relocation_info *pair =
4604 (struct scattered_relocation_info*) &relocs[i+1];
4606 if(!pair->r_scattered || pair->r_type != GENERIC_RELOC_PAIR)
4607 barf("Invalid Mach-O file: "
4608 "RELOC_*_SECTDIFF not followed by RELOC_PAIR");
4610 word = (unsigned long)
4611 (relocateAddress(oc, nSections, sections, scat->r_value)
4612 - relocateAddress(oc, nSections, sections, pair->r_value));
4615 #ifdef powerpc_HOST_ARCH
4616 else if(scat->r_type == PPC_RELOC_HI16
4617 || scat->r_type == PPC_RELOC_LO16
4618 || scat->r_type == PPC_RELOC_HA16
4619 || scat->r_type == PPC_RELOC_LO14)
4620 { // these are generated by label+offset things
4621 struct relocation_info *pair = &relocs[i+1];
4622 if((pair->r_address & R_SCATTERED) || pair->r_type != PPC_RELOC_PAIR)
4623 barf("Invalid Mach-O file: "
4624 "PPC_RELOC_* not followed by PPC_RELOC_PAIR");
4626 if(scat->r_type == PPC_RELOC_LO16)
4628 word = ((unsigned short*) wordPtr)[1];
4629 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4631 else if(scat->r_type == PPC_RELOC_LO14)
4633 barf("Unsupported Relocation: PPC_RELOC_LO14");
4634 word = ((unsigned short*) wordPtr)[1] & 0xFFFC;
4635 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4637 else if(scat->r_type == PPC_RELOC_HI16)
4639 word = ((unsigned short*) wordPtr)[1] << 16;
4640 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF);
4642 else if(scat->r_type == PPC_RELOC_HA16)
4644 word = ((unsigned short*) wordPtr)[1] << 16;
4645 word += ((short)relocs[i+1].r_address & (short)0xFFFF);
4649 word += (unsigned long) relocateAddress(oc, nSections, sections, scat->r_value)
4657 barf ("Don't know how to handle this Mach-O "
4658 "scattered relocation entry: "
4659 "object file %s; entry type %ld; "
4661 OC_INFORMATIVE_FILENAME(oc),
4667 #ifdef powerpc_HOST_ARCH
4668 if(scat->r_type == GENERIC_RELOC_VANILLA
4669 || scat->r_type == PPC_RELOC_SECTDIFF)
4671 if(scat->r_type == GENERIC_RELOC_VANILLA
4672 || scat->r_type == GENERIC_RELOC_SECTDIFF
4673 || scat->r_type == GENERIC_RELOC_LOCAL_SECTDIFF)
4678 #ifdef powerpc_HOST_ARCH
4679 else if(scat->r_type == PPC_RELOC_LO16_SECTDIFF || scat->r_type == PPC_RELOC_LO16)
4681 ((unsigned short*) wordPtr)[1] = word & 0xFFFF;
4683 else if(scat->r_type == PPC_RELOC_HI16_SECTDIFF || scat->r_type == PPC_RELOC_HI16)
4685 ((unsigned short*) wordPtr)[1] = (word >> 16) & 0xFFFF;
4687 else if(scat->r_type == PPC_RELOC_HA16_SECTDIFF || scat->r_type == PPC_RELOC_HA16)
4689 ((unsigned short*) wordPtr)[1] = ((word >> 16) & 0xFFFF)
4690 + ((word & (1<<15)) ? 1 : 0);
4696 barf("Can't handle Mach-O scattered relocation entry "
4697 "with this r_length tag: "
4698 "object file %s; entry type %ld; "
4699 "r_length tag %ld; address %#lx\n",
4700 OC_INFORMATIVE_FILENAME(oc),
4707 else /* scat->r_pcrel */
4709 barf("Don't know how to handle *PC-relative* Mach-O "
4710 "scattered relocation entry: "
4711 "object file %s; entry type %ld; address %#lx\n",
4712 OC_INFORMATIVE_FILENAME(oc),
4719 else /* !(relocs[i].r_address & R_SCATTERED) */
4721 struct relocation_info *reloc = &relocs[i];
4722 if(reloc->r_pcrel && !reloc->r_extern)
4725 if(reloc->r_length == 2)
4727 unsigned long word = 0;
4728 #ifdef powerpc_HOST_ARCH
4729 unsigned long jumpIsland = 0;
4730 long offsetToJumpIsland = 0xBADBAD42; // initialise to bad value
4731 // to avoid warning and to catch
4735 unsigned long* wordPtr = (unsigned long*) (image + sect->offset + reloc->r_address);
4736 checkProddableBlock(oc,wordPtr);
4738 if(reloc->r_type == GENERIC_RELOC_VANILLA)
4742 #ifdef powerpc_HOST_ARCH
4743 else if(reloc->r_type == PPC_RELOC_LO16)
4745 word = ((unsigned short*) wordPtr)[1];
4746 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4748 else if(reloc->r_type == PPC_RELOC_HI16)
4750 word = ((unsigned short*) wordPtr)[1] << 16;
4751 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF);
4753 else if(reloc->r_type == PPC_RELOC_HA16)
4755 word = ((unsigned short*) wordPtr)[1] << 16;
4756 word += ((short)relocs[i+1].r_address & (short)0xFFFF);
4758 else if(reloc->r_type == PPC_RELOC_BR24)
4761 word = (word & 0x03FFFFFC) | ((word & 0x02000000) ? 0xFC000000 : 0);
4766 barf("Can't handle this Mach-O relocation entry "
4768 "object file %s; entry type %ld; address %#lx\n",
4769 OC_INFORMATIVE_FILENAME(oc),
4775 if(!reloc->r_extern)
4778 sections[reloc->r_symbolnum-1].offset
4779 - sections[reloc->r_symbolnum-1].addr
4786 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4787 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4788 void *symbolAddress = lookupSymbol(nm);
4791 errorBelch("\nunknown symbol `%s'", nm);
4797 #ifdef powerpc_HOST_ARCH
4798 // In the .o file, this should be a relative jump to NULL
4799 // and we'll change it to a relative jump to the symbol
4800 ASSERT(word + reloc->r_address == 0);
4801 jumpIsland = (unsigned long)
4802 &makeSymbolExtra(oc,
4804 (unsigned long) symbolAddress)
4808 offsetToJumpIsland = word + jumpIsland
4809 - (((long)image) + sect->offset - sect->addr);
4812 word += (unsigned long) symbolAddress
4813 - (((long)image) + sect->offset - sect->addr);
4817 word += (unsigned long) symbolAddress;
4821 if(reloc->r_type == GENERIC_RELOC_VANILLA)
4826 #ifdef powerpc_HOST_ARCH
4827 else if(reloc->r_type == PPC_RELOC_LO16)
4829 ((unsigned short*) wordPtr)[1] = word & 0xFFFF;
4832 else if(reloc->r_type == PPC_RELOC_HI16)
4834 ((unsigned short*) wordPtr)[1] = (word >> 16) & 0xFFFF;
4837 else if(reloc->r_type == PPC_RELOC_HA16)
4839 ((unsigned short*) wordPtr)[1] = ((word >> 16) & 0xFFFF)
4840 + ((word & (1<<15)) ? 1 : 0);
4843 else if(reloc->r_type == PPC_RELOC_BR24)
4845 if((word & 0x03) != 0)
4846 barf("%s: unconditional relative branch with a displacement "
4847 "which isn't a multiple of 4 bytes: %#lx",
4848 OC_INFORMATIVE_FILENAME(oc),
4851 if((word & 0xFE000000) != 0xFE000000 &&
4852 (word & 0xFE000000) != 0x00000000)
4854 // The branch offset is too large.
4855 // Therefore, we try to use a jump island.
4858 barf("%s: unconditional relative branch out of range: "
4859 "no jump island available: %#lx",
4860 OC_INFORMATIVE_FILENAME(oc),
4864 word = offsetToJumpIsland;
4865 if((word & 0xFE000000) != 0xFE000000 &&
4866 (word & 0xFE000000) != 0x00000000)
4867 barf("%s: unconditional relative branch out of range: "
4868 "jump island out of range: %#lx",
4869 OC_INFORMATIVE_FILENAME(oc),
4872 *wordPtr = (*wordPtr & 0xFC000003) | (word & 0x03FFFFFC);
4879 barf("Can't handle Mach-O relocation entry (not scattered) "
4880 "with this r_length tag: "
4881 "object file %s; entry type %ld; "
4882 "r_length tag %ld; address %#lx\n",
4883 OC_INFORMATIVE_FILENAME(oc),
4895 static int ocGetNames_MachO(ObjectCode* oc)
4897 char *image = (char*) oc->image;
4898 struct mach_header *header = (struct mach_header*) image;
4899 struct load_command *lc = (struct load_command*) (image + sizeof(struct mach_header));
4900 unsigned i,curSymbol = 0;
4901 struct segment_command *segLC = NULL;
4902 struct section *sections;
4903 struct symtab_command *symLC = NULL;
4904 struct nlist *nlist;
4905 unsigned long commonSize = 0;
4906 char *commonStorage = NULL;
4907 unsigned long commonCounter;
4909 IF_DEBUG(linker,debugBelch("ocGetNames_MachO\n"));
4911 for(i=0;i<header->ncmds;i++)
4913 if(lc->cmd == LC_SEGMENT || lc->cmd == LC_SEGMENT_64)
4914 segLC = (struct segment_command*) lc;
4915 else if(lc->cmd == LC_SYMTAB)
4916 symLC = (struct symtab_command*) lc;
4917 lc = (struct load_command *) ( ((char*)lc) + lc->cmdsize );
4920 sections = (struct section*) (segLC+1);
4921 nlist = symLC ? (struct nlist*) (image + symLC->symoff)
4925 barf("ocGetNames_MachO: no segment load command");
4927 for(i=0;i<segLC->nsects;i++)
4929 if(sections[i].size == 0)
4932 if((sections[i].flags & SECTION_TYPE) == S_ZEROFILL)
4934 char * zeroFillArea = stgCallocBytes(1,sections[i].size,
4935 "ocGetNames_MachO(common symbols)");
4936 sections[i].offset = zeroFillArea - image;
4939 if(!strcmp(sections[i].sectname,"__text"))
4940 addSection(oc, SECTIONKIND_CODE_OR_RODATA,
4941 (void*) (image + sections[i].offset),
4942 (void*) (image + sections[i].offset + sections[i].size));
4943 else if(!strcmp(sections[i].sectname,"__const"))
4944 addSection(oc, SECTIONKIND_RWDATA,
4945 (void*) (image + sections[i].offset),
4946 (void*) (image + sections[i].offset + sections[i].size));
4947 else if(!strcmp(sections[i].sectname,"__data"))
4948 addSection(oc, SECTIONKIND_RWDATA,
4949 (void*) (image + sections[i].offset),
4950 (void*) (image + sections[i].offset + sections[i].size));
4951 else if(!strcmp(sections[i].sectname,"__bss")
4952 || !strcmp(sections[i].sectname,"__common"))
4953 addSection(oc, SECTIONKIND_RWDATA,
4954 (void*) (image + sections[i].offset),
4955 (void*) (image + sections[i].offset + sections[i].size));
4957 addProddableBlock(oc, (void*) (image + sections[i].offset),
4961 // count external symbols defined here
4965 for(i=0;i<symLC->nsyms;i++)
4967 if(nlist[i].n_type & N_STAB)
4969 else if(nlist[i].n_type & N_EXT)
4971 if((nlist[i].n_type & N_TYPE) == N_UNDF
4972 && (nlist[i].n_value != 0))
4974 commonSize += nlist[i].n_value;
4977 else if((nlist[i].n_type & N_TYPE) == N_SECT)
4982 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
4983 "ocGetNames_MachO(oc->symbols)");
4987 for(i=0;i<symLC->nsyms;i++)
4989 if(nlist[i].n_type & N_STAB)
4991 else if((nlist[i].n_type & N_TYPE) == N_SECT)
4993 if(nlist[i].n_type & N_EXT)
4995 char *nm = image + symLC->stroff + nlist[i].n_un.n_strx;
4996 if((nlist[i].n_desc & N_WEAK_DEF) && lookupSymbol(nm))
4997 ; // weak definition, and we already have a definition
5000 IF_DEBUG(linker,debugBelch("Adding symbol 1 %s\n", nm));
5001 ghciInsertStrHashTable(oc->fileName, symhash, nm,
5003 + sections[nlist[i].n_sect-1].offset
5004 - sections[nlist[i].n_sect-1].addr
5005 + nlist[i].n_value);
5006 oc->symbols[curSymbol++] = nm;
5013 commonStorage = stgCallocBytes(1,commonSize,"ocGetNames_MachO(common symbols)");
5014 commonCounter = (unsigned long)commonStorage;
5017 for(i=0;i<symLC->nsyms;i++)
5019 if((nlist[i].n_type & N_TYPE) == N_UNDF
5020 && (nlist[i].n_type & N_EXT) && (nlist[i].n_value != 0))
5022 char *nm = image + symLC->stroff + nlist[i].n_un.n_strx;
5023 unsigned long sz = nlist[i].n_value;
5025 nlist[i].n_value = commonCounter;
5027 IF_DEBUG(linker,debugBelch("Adding symbol 2 %s\n", nm));
5028 ghciInsertStrHashTable(oc->fileName, symhash, nm,
5029 (void*)commonCounter);
5030 oc->symbols[curSymbol++] = nm;
5032 commonCounter += sz;
5039 static int ocResolve_MachO(ObjectCode* oc)
5041 char *image = (char*) oc->image;
5042 struct mach_header *header = (struct mach_header*) image;
5043 struct load_command *lc = (struct load_command*) (image + sizeof(struct mach_header));
5045 struct segment_command *segLC = NULL;
5046 struct section *sections;
5047 struct symtab_command *symLC = NULL;
5048 struct dysymtab_command *dsymLC = NULL;
5049 struct nlist *nlist;
5051 for(i=0;i<header->ncmds;i++)
5053 if(lc->cmd == LC_SEGMENT || lc->cmd == LC_SEGMENT_64)
5054 segLC = (struct segment_command*) lc;
5055 else if(lc->cmd == LC_SYMTAB)
5056 symLC = (struct symtab_command*) lc;
5057 else if(lc->cmd == LC_DYSYMTAB)
5058 dsymLC = (struct dysymtab_command*) lc;
5059 lc = (struct load_command *) ( ((char*)lc) + lc->cmdsize );
5062 sections = (struct section*) (segLC+1);
5063 nlist = symLC ? (struct nlist*) (image + symLC->symoff)
5068 unsigned long *indirectSyms
5069 = (unsigned long*) (image + dsymLC->indirectsymoff);
5071 for(i=0;i<segLC->nsects;i++)
5073 if( !strcmp(sections[i].sectname,"__la_symbol_ptr")
5074 || !strcmp(sections[i].sectname,"__la_sym_ptr2")
5075 || !strcmp(sections[i].sectname,"__la_sym_ptr3"))
5077 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
5080 else if(!strcmp(sections[i].sectname,"__nl_symbol_ptr")
5081 || !strcmp(sections[i].sectname,"__pointers"))
5083 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
5086 else if(!strcmp(sections[i].sectname,"__jump_table"))
5088 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
5094 for(i=0;i<segLC->nsects;i++)
5096 if(!relocateSection(oc,image,symLC,nlist,segLC->nsects,sections,§ions[i]))
5100 #if defined (powerpc_HOST_ARCH)
5101 ocFlushInstructionCache( oc );
5107 #ifdef powerpc_HOST_ARCH
5109 * The Mach-O object format uses leading underscores. But not everywhere.
5110 * There is a small number of runtime support functions defined in
5111 * libcc_dynamic.a whose name does not have a leading underscore.
5112 * As a consequence, we can't get their address from C code.
5113 * We have to use inline assembler just to take the address of a function.
5117 extern void* symbolsWithoutUnderscore[];
5119 static void machoInitSymbolsWithoutUnderscore()
5121 void **p = symbolsWithoutUnderscore;
5122 __asm__ volatile(".globl _symbolsWithoutUnderscore\n.data\n_symbolsWithoutUnderscore:");
5124 #undef SymI_NeedsProto
5125 #define SymI_NeedsProto(x) \
5126 __asm__ volatile(".long " # x);
5128 RTS_MACHO_NOUNDERLINE_SYMBOLS
5130 __asm__ volatile(".text");
5132 #undef SymI_NeedsProto
5133 #define SymI_NeedsProto(x) \
5134 ghciInsertStrHashTable("(GHCi built-in symbols)", symhash, #x, *p++);
5136 RTS_MACHO_NOUNDERLINE_SYMBOLS
5138 #undef SymI_NeedsProto
5144 * Figure out by how much to shift the entire Mach-O file in memory
5145 * when loading so that its single segment ends up 16-byte-aligned
5147 static int machoGetMisalignment( FILE * f )
5149 struct mach_header header;
5152 fread(&header, sizeof(header), 1, f);
5155 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
5156 if(header.magic != MH_MAGIC_64) {
5157 errorBelch("Bad magic. Expected: %08x, got: %08x.\n",
5158 MH_MAGIC_64, header->magic);
5162 if(header.magic != MH_MAGIC) {
5163 errorBelch("Bad magic. Expected: %08x, got: %08x.\n",
5164 MH_MAGIC, header->magic);
5169 misalignment = (header.sizeofcmds + sizeof(header))
5172 return misalignment ? (16 - misalignment) : 0;