1 /* -----------------------------------------------------------------------------
3 * (c) The GHC Team, 2000-2004
7 * ---------------------------------------------------------------------------*/
10 #include "PosixSource.h"
13 /* Linux needs _GNU_SOURCE to get RTLD_DEFAULT from <dlfcn.h> and
14 MREMAP_MAYMOVE from <sys/mman.h>.
23 #include "sm/Storage.h"
26 #include "LinkerInternals.h"
29 #include "StgPrimFloat.h" // for __int_encodeFloat etc.
32 #if !defined(mingw32_HOST_OS)
33 #include "posix/Signals.h"
36 // get protos for is*()
39 #ifdef HAVE_SYS_TYPES_H
40 #include <sys/types.h>
48 #ifdef HAVE_SYS_STAT_H
52 #if defined(HAVE_DLFCN_H)
56 #if defined(cygwin32_HOST_OS)
61 #ifdef HAVE_SYS_TIME_H
65 #include <sys/fcntl.h>
66 #include <sys/termios.h>
67 #include <sys/utime.h>
68 #include <sys/utsname.h>
72 #if defined(linux_HOST_OS) || defined(freebsd_HOST_OS) || defined(dragonfly_HOST_OS) || defined(netbsd_HOST_OS) || defined(openbsd_HOST_OS) || defined(darwin_HOST_OS)
83 #if defined(linux_HOST_OS) || defined(solaris2_HOST_OS) || defined(freebsd_HOST_OS) || defined(dragonfly_HOST_OS) || defined(netbsd_HOST_OS) || defined(openbsd_HOST_OS)
84 # define OBJFORMAT_ELF
85 # include <regex.h> // regex is already used by dlopen() so this is OK
86 // to use here without requiring an additional lib
87 #elif defined(cygwin32_HOST_OS) || defined (mingw32_HOST_OS)
88 # define OBJFORMAT_PEi386
91 #elif defined(darwin_HOST_OS)
92 # define OBJFORMAT_MACHO
94 # include <mach-o/loader.h>
95 # include <mach-o/nlist.h>
96 # include <mach-o/reloc.h>
97 #if !defined(HAVE_DLFCN_H)
98 # include <mach-o/dyld.h>
100 #if defined(powerpc_HOST_ARCH)
101 # include <mach-o/ppc/reloc.h>
103 #if defined(x86_64_HOST_ARCH)
104 # include <mach-o/x86_64/reloc.h>
108 #if defined(x86_64_HOST_ARCH) && defined(darwin_HOST_OS)
112 /* Hash table mapping symbol names to Symbol */
113 static /*Str*/HashTable *symhash;
115 /* Hash table mapping symbol names to StgStablePtr */
116 static /*Str*/HashTable *stablehash;
118 /* List of currently loaded objects */
119 ObjectCode *objects = NULL; /* initially empty */
121 static HsInt loadOc( ObjectCode* oc );
122 static ObjectCode* mkOc( char *path, char *image, int imageSize
124 #ifdef darwin_HOST_OS
130 #if defined(OBJFORMAT_ELF)
131 static int ocVerifyImage_ELF ( ObjectCode* oc );
132 static int ocGetNames_ELF ( ObjectCode* oc );
133 static int ocResolve_ELF ( ObjectCode* oc );
134 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
135 static int ocAllocateSymbolExtras_ELF ( ObjectCode* oc );
137 #elif defined(OBJFORMAT_PEi386)
138 static int ocVerifyImage_PEi386 ( ObjectCode* oc );
139 static int ocGetNames_PEi386 ( ObjectCode* oc );
140 static int ocResolve_PEi386 ( ObjectCode* oc );
141 static void *lookupSymbolInDLLs ( unsigned char *lbl );
142 static void zapTrailingAtSign ( unsigned char *sym );
143 #elif defined(OBJFORMAT_MACHO)
144 static int ocVerifyImage_MachO ( ObjectCode* oc );
145 static int ocGetNames_MachO ( ObjectCode* oc );
146 static int ocResolve_MachO ( ObjectCode* oc );
149 static int machoGetMisalignment( FILE * );
151 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
152 static int ocAllocateSymbolExtras_MachO ( ObjectCode* oc );
154 #ifdef powerpc_HOST_ARCH
155 static void machoInitSymbolsWithoutUnderscore( void );
159 /* on x86_64 we have a problem with relocating symbol references in
160 * code that was compiled without -fPIC. By default, the small memory
161 * model is used, which assumes that symbol references can fit in a
162 * 32-bit slot. The system dynamic linker makes this work for
163 * references to shared libraries by either (a) allocating a jump
164 * table slot for code references, or (b) moving the symbol at load
165 * time (and copying its contents, if necessary) for data references.
167 * We unfortunately can't tell whether symbol references are to code
168 * or data. So for now we assume they are code (the vast majority
169 * are), and allocate jump-table slots. Unfortunately this will
170 * SILENTLY generate crashing code for data references. This hack is
171 * enabled by X86_64_ELF_NONPIC_HACK.
173 * One workaround is to use shared Haskell libraries. This is
174 * coming. Another workaround is to keep the static libraries but
175 * compile them with -fPIC, because that will generate PIC references
176 * to data which can be relocated. The PIC code is still too green to
177 * do this systematically, though.
180 * See thread http://www.haskell.org/pipermail/cvs-ghc/2007-September/038458.html
182 * Naming Scheme for Symbol Macros
184 * SymI_*: symbol is internal to the RTS. It resides in an object
185 * file/library that is statically.
186 * SymE_*: symbol is external to the RTS library. It might be linked
189 * Sym*_HasProto : the symbol prototype is imported in an include file
190 * or defined explicitly
191 * Sym*_NeedsProto: the symbol is undefined and we add a dummy
192 * default proto extern void sym(void);
194 #define X86_64_ELF_NONPIC_HACK 1
196 /* Link objects into the lower 2Gb on x86_64. GHC assumes the
197 * small memory model on this architecture (see gcc docs,
200 * MAP_32BIT not available on OpenBSD/amd64
202 #if defined(x86_64_HOST_ARCH) && defined(MAP_32BIT)
203 #define TRY_MAP_32BIT MAP_32BIT
205 #define TRY_MAP_32BIT 0
209 * Due to the small memory model (see above), on x86_64 we have to map
210 * all our non-PIC object files into the low 2Gb of the address space
211 * (why 2Gb and not 4Gb? Because all addresses must be reachable
212 * using a 32-bit signed PC-relative offset). On Linux we can do this
213 * using the MAP_32BIT flag to mmap(), however on other OSs
214 * (e.g. *BSD, see #2063, and also on Linux inside Xen, see #2512), we
215 * can't do this. So on these systems, we have to pick a base address
216 * in the low 2Gb of the address space and try to allocate memory from
219 * We pick a default address based on the OS, but also make this
220 * configurable via an RTS flag (+RTS -xm)
222 #if !defined(ALWAYS_PIC) && defined(x86_64_HOST_ARCH)
224 #if defined(MAP_32BIT)
225 // Try to use MAP_32BIT
226 #define MMAP_32BIT_BASE_DEFAULT 0
229 #define MMAP_32BIT_BASE_DEFAULT 0x40000000
232 static void *mmap_32bit_base = (void *)MMAP_32BIT_BASE_DEFAULT;
235 /* MAP_ANONYMOUS is MAP_ANON on some systems, e.g. OpenBSD */
236 #if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
237 #define MAP_ANONYMOUS MAP_ANON
240 /* -----------------------------------------------------------------------------
241 * Built-in symbols from the RTS
244 typedef struct _RtsSymbolVal {
249 #define Maybe_Stable_Names SymI_HasProto(stg_mkWeakzh) \
250 SymI_HasProto(stg_mkWeakForeignEnvzh) \
251 SymI_HasProto(stg_makeStableNamezh) \
252 SymI_HasProto(stg_finalizzeWeakzh)
254 #if !defined (mingw32_HOST_OS)
255 #define RTS_POSIX_ONLY_SYMBOLS \
256 SymI_HasProto(__hscore_get_saved_termios) \
257 SymI_HasProto(__hscore_set_saved_termios) \
258 SymI_HasProto(shutdownHaskellAndSignal) \
259 SymI_HasProto(lockFile) \
260 SymI_HasProto(unlockFile) \
261 SymI_HasProto(signal_handlers) \
262 SymI_HasProto(stg_sig_install) \
263 SymI_NeedsProto(nocldstop)
266 #if defined (cygwin32_HOST_OS)
267 #define RTS_MINGW_ONLY_SYMBOLS /**/
268 /* Don't have the ability to read import libs / archives, so
269 * we have to stupidly list a lot of what libcygwin.a
272 #define RTS_CYGWIN_ONLY_SYMBOLS \
273 SymI_HasProto(regfree) \
274 SymI_HasProto(regexec) \
275 SymI_HasProto(regerror) \
276 SymI_HasProto(regcomp) \
277 SymI_HasProto(__errno) \
278 SymI_HasProto(access) \
279 SymI_HasProto(chmod) \
280 SymI_HasProto(chdir) \
281 SymI_HasProto(close) \
282 SymI_HasProto(creat) \
284 SymI_HasProto(dup2) \
285 SymI_HasProto(fstat) \
286 SymI_HasProto(fcntl) \
287 SymI_HasProto(getcwd) \
288 SymI_HasProto(getenv) \
289 SymI_HasProto(lseek) \
290 SymI_HasProto(open) \
291 SymI_HasProto(fpathconf) \
292 SymI_HasProto(pathconf) \
293 SymI_HasProto(stat) \
295 SymI_HasProto(tanh) \
296 SymI_HasProto(cosh) \
297 SymI_HasProto(sinh) \
298 SymI_HasProto(atan) \
299 SymI_HasProto(acos) \
300 SymI_HasProto(asin) \
306 SymI_HasProto(sqrt) \
307 SymI_HasProto(localtime_r) \
308 SymI_HasProto(gmtime_r) \
309 SymI_HasProto(mktime) \
310 SymI_NeedsProto(_imp___tzname) \
311 SymI_HasProto(gettimeofday) \
312 SymI_HasProto(timezone) \
313 SymI_HasProto(tcgetattr) \
314 SymI_HasProto(tcsetattr) \
315 SymI_HasProto(memcpy) \
316 SymI_HasProto(memmove) \
317 SymI_HasProto(realloc) \
318 SymI_HasProto(malloc) \
319 SymI_HasProto(free) \
320 SymI_HasProto(fork) \
321 SymI_HasProto(lstat) \
322 SymI_HasProto(isatty) \
323 SymI_HasProto(mkdir) \
324 SymI_HasProto(opendir) \
325 SymI_HasProto(readdir) \
326 SymI_HasProto(rewinddir) \
327 SymI_HasProto(closedir) \
328 SymI_HasProto(link) \
329 SymI_HasProto(mkfifo) \
330 SymI_HasProto(pipe) \
331 SymI_HasProto(read) \
332 SymI_HasProto(rename) \
333 SymI_HasProto(rmdir) \
334 SymI_HasProto(select) \
335 SymI_HasProto(system) \
336 SymI_HasProto(write) \
337 SymI_HasProto(strcmp) \
338 SymI_HasProto(strcpy) \
339 SymI_HasProto(strncpy) \
340 SymI_HasProto(strerror) \
341 SymI_HasProto(sigaddset) \
342 SymI_HasProto(sigemptyset) \
343 SymI_HasProto(sigprocmask) \
344 SymI_HasProto(umask) \
345 SymI_HasProto(uname) \
346 SymI_HasProto(unlink) \
347 SymI_HasProto(utime) \
348 SymI_HasProto(waitpid)
350 #elif !defined(mingw32_HOST_OS)
351 #define RTS_MINGW_ONLY_SYMBOLS /**/
352 #define RTS_CYGWIN_ONLY_SYMBOLS /**/
353 #else /* defined(mingw32_HOST_OS) */
354 #define RTS_POSIX_ONLY_SYMBOLS /**/
355 #define RTS_CYGWIN_ONLY_SYMBOLS /**/
357 #if HAVE_GETTIMEOFDAY
358 #define RTS_MINGW_GETTIMEOFDAY_SYM SymI_NeedsProto(gettimeofday)
360 #define RTS_MINGW_GETTIMEOFDAY_SYM /**/
363 #if HAVE___MINGW_VFPRINTF
364 #define RTS___MINGW_VFPRINTF_SYM SymI_HasProto(__mingw_vfprintf)
366 #define RTS___MINGW_VFPRINTF_SYM /**/
369 /* These are statically linked from the mingw libraries into the ghc
370 executable, so we have to employ this hack. */
371 #define RTS_MINGW_ONLY_SYMBOLS \
372 SymI_HasProto(stg_asyncReadzh) \
373 SymI_HasProto(stg_asyncWritezh) \
374 SymI_HasProto(stg_asyncDoProczh) \
375 SymI_HasProto(memset) \
376 SymI_HasProto(inet_ntoa) \
377 SymI_HasProto(inet_addr) \
378 SymI_HasProto(htonl) \
379 SymI_HasProto(recvfrom) \
380 SymI_HasProto(listen) \
381 SymI_HasProto(bind) \
382 SymI_HasProto(shutdown) \
383 SymI_HasProto(connect) \
384 SymI_HasProto(htons) \
385 SymI_HasProto(ntohs) \
386 SymI_HasProto(getservbyname) \
387 SymI_HasProto(getservbyport) \
388 SymI_HasProto(getprotobynumber) \
389 SymI_HasProto(getprotobyname) \
390 SymI_HasProto(gethostbyname) \
391 SymI_HasProto(gethostbyaddr) \
392 SymI_HasProto(gethostname) \
393 SymI_HasProto(strcpy) \
394 SymI_HasProto(strncpy) \
395 SymI_HasProto(abort) \
396 SymI_NeedsProto(_alloca) \
397 SymI_HasProto(isxdigit) \
398 SymI_HasProto(isupper) \
399 SymI_HasProto(ispunct) \
400 SymI_HasProto(islower) \
401 SymI_HasProto(isspace) \
402 SymI_HasProto(isprint) \
403 SymI_HasProto(isdigit) \
404 SymI_HasProto(iscntrl) \
405 SymI_HasProto(isalpha) \
406 SymI_HasProto(isalnum) \
407 SymI_HasProto(isascii) \
408 RTS___MINGW_VFPRINTF_SYM \
409 SymI_HasProto(strcmp) \
410 SymI_HasProto(memmove) \
411 SymI_HasProto(realloc) \
412 SymI_HasProto(malloc) \
414 SymI_HasProto(tanh) \
415 SymI_HasProto(cosh) \
416 SymI_HasProto(sinh) \
417 SymI_HasProto(atan) \
418 SymI_HasProto(acos) \
419 SymI_HasProto(asin) \
425 SymI_HasProto(sqrt) \
426 SymI_HasProto(powf) \
427 SymI_HasProto(tanhf) \
428 SymI_HasProto(coshf) \
429 SymI_HasProto(sinhf) \
430 SymI_HasProto(atanf) \
431 SymI_HasProto(acosf) \
432 SymI_HasProto(asinf) \
433 SymI_HasProto(tanf) \
434 SymI_HasProto(cosf) \
435 SymI_HasProto(sinf) \
436 SymI_HasProto(expf) \
437 SymI_HasProto(logf) \
438 SymI_HasProto(sqrtf) \
440 SymI_HasProto(erfc) \
441 SymI_HasProto(erff) \
442 SymI_HasProto(erfcf) \
443 SymI_HasProto(memcpy) \
444 SymI_HasProto(rts_InstallConsoleEvent) \
445 SymI_HasProto(rts_ConsoleHandlerDone) \
446 SymI_NeedsProto(mktime) \
447 SymI_NeedsProto(_imp___timezone) \
448 SymI_NeedsProto(_imp___tzname) \
449 SymI_NeedsProto(_imp__tzname) \
450 SymI_NeedsProto(_imp___iob) \
451 SymI_NeedsProto(_imp___osver) \
452 SymI_NeedsProto(localtime) \
453 SymI_NeedsProto(gmtime) \
454 SymI_NeedsProto(opendir) \
455 SymI_NeedsProto(readdir) \
456 SymI_NeedsProto(rewinddir) \
457 SymI_NeedsProto(_imp____mb_cur_max) \
458 SymI_NeedsProto(_imp___pctype) \
459 SymI_NeedsProto(__chkstk) \
460 RTS_MINGW_GETTIMEOFDAY_SYM \
461 SymI_NeedsProto(closedir)
465 #if defined(darwin_HOST_OS) && HAVE_PRINTF_LDBLSTUB
466 #define RTS_DARWIN_ONLY_SYMBOLS \
467 SymI_NeedsProto(asprintf$LDBLStub) \
468 SymI_NeedsProto(err$LDBLStub) \
469 SymI_NeedsProto(errc$LDBLStub) \
470 SymI_NeedsProto(errx$LDBLStub) \
471 SymI_NeedsProto(fprintf$LDBLStub) \
472 SymI_NeedsProto(fscanf$LDBLStub) \
473 SymI_NeedsProto(fwprintf$LDBLStub) \
474 SymI_NeedsProto(fwscanf$LDBLStub) \
475 SymI_NeedsProto(printf$LDBLStub) \
476 SymI_NeedsProto(scanf$LDBLStub) \
477 SymI_NeedsProto(snprintf$LDBLStub) \
478 SymI_NeedsProto(sprintf$LDBLStub) \
479 SymI_NeedsProto(sscanf$LDBLStub) \
480 SymI_NeedsProto(strtold$LDBLStub) \
481 SymI_NeedsProto(swprintf$LDBLStub) \
482 SymI_NeedsProto(swscanf$LDBLStub) \
483 SymI_NeedsProto(syslog$LDBLStub) \
484 SymI_NeedsProto(vasprintf$LDBLStub) \
485 SymI_NeedsProto(verr$LDBLStub) \
486 SymI_NeedsProto(verrc$LDBLStub) \
487 SymI_NeedsProto(verrx$LDBLStub) \
488 SymI_NeedsProto(vfprintf$LDBLStub) \
489 SymI_NeedsProto(vfscanf$LDBLStub) \
490 SymI_NeedsProto(vfwprintf$LDBLStub) \
491 SymI_NeedsProto(vfwscanf$LDBLStub) \
492 SymI_NeedsProto(vprintf$LDBLStub) \
493 SymI_NeedsProto(vscanf$LDBLStub) \
494 SymI_NeedsProto(vsnprintf$LDBLStub) \
495 SymI_NeedsProto(vsprintf$LDBLStub) \
496 SymI_NeedsProto(vsscanf$LDBLStub) \
497 SymI_NeedsProto(vswprintf$LDBLStub) \
498 SymI_NeedsProto(vswscanf$LDBLStub) \
499 SymI_NeedsProto(vsyslog$LDBLStub) \
500 SymI_NeedsProto(vwarn$LDBLStub) \
501 SymI_NeedsProto(vwarnc$LDBLStub) \
502 SymI_NeedsProto(vwarnx$LDBLStub) \
503 SymI_NeedsProto(vwprintf$LDBLStub) \
504 SymI_NeedsProto(vwscanf$LDBLStub) \
505 SymI_NeedsProto(warn$LDBLStub) \
506 SymI_NeedsProto(warnc$LDBLStub) \
507 SymI_NeedsProto(warnx$LDBLStub) \
508 SymI_NeedsProto(wcstold$LDBLStub) \
509 SymI_NeedsProto(wprintf$LDBLStub) \
510 SymI_NeedsProto(wscanf$LDBLStub)
512 #define RTS_DARWIN_ONLY_SYMBOLS
516 # define MAIN_CAP_SYM SymI_HasProto(MainCapability)
518 # define MAIN_CAP_SYM
521 #if !defined(mingw32_HOST_OS)
522 #define RTS_USER_SIGNALS_SYMBOLS \
523 SymI_HasProto(setIOManagerControlFd) \
524 SymI_HasProto(setIOManagerWakeupFd) \
525 SymI_HasProto(ioManagerWakeup) \
526 SymI_HasProto(blockUserSignals) \
527 SymI_HasProto(unblockUserSignals)
529 #define RTS_USER_SIGNALS_SYMBOLS \
530 SymI_HasProto(ioManagerWakeup) \
531 SymI_HasProto(sendIOManagerEvent) \
532 SymI_HasProto(readIOManagerEvent) \
533 SymI_HasProto(getIOManagerEvent) \
534 SymI_HasProto(console_handler)
537 #define RTS_LIBFFI_SYMBOLS \
538 SymE_NeedsProto(ffi_prep_cif) \
539 SymE_NeedsProto(ffi_call) \
540 SymE_NeedsProto(ffi_type_void) \
541 SymE_NeedsProto(ffi_type_float) \
542 SymE_NeedsProto(ffi_type_double) \
543 SymE_NeedsProto(ffi_type_sint64) \
544 SymE_NeedsProto(ffi_type_uint64) \
545 SymE_NeedsProto(ffi_type_sint32) \
546 SymE_NeedsProto(ffi_type_uint32) \
547 SymE_NeedsProto(ffi_type_sint16) \
548 SymE_NeedsProto(ffi_type_uint16) \
549 SymE_NeedsProto(ffi_type_sint8) \
550 SymE_NeedsProto(ffi_type_uint8) \
551 SymE_NeedsProto(ffi_type_pointer)
553 #ifdef TABLES_NEXT_TO_CODE
554 #define RTS_RET_SYMBOLS /* nothing */
556 #define RTS_RET_SYMBOLS \
557 SymI_HasProto(stg_enter_ret) \
558 SymI_HasProto(stg_gc_fun_ret) \
559 SymI_HasProto(stg_ap_v_ret) \
560 SymI_HasProto(stg_ap_f_ret) \
561 SymI_HasProto(stg_ap_d_ret) \
562 SymI_HasProto(stg_ap_l_ret) \
563 SymI_HasProto(stg_ap_n_ret) \
564 SymI_HasProto(stg_ap_p_ret) \
565 SymI_HasProto(stg_ap_pv_ret) \
566 SymI_HasProto(stg_ap_pp_ret) \
567 SymI_HasProto(stg_ap_ppv_ret) \
568 SymI_HasProto(stg_ap_ppp_ret) \
569 SymI_HasProto(stg_ap_pppv_ret) \
570 SymI_HasProto(stg_ap_pppp_ret) \
571 SymI_HasProto(stg_ap_ppppp_ret) \
572 SymI_HasProto(stg_ap_pppppp_ret)
575 /* Modules compiled with -ticky may mention ticky counters */
576 /* This list should marry up with the one in $(TOP)/includes/stg/Ticky.h */
577 #define RTS_TICKY_SYMBOLS \
578 SymI_NeedsProto(ticky_entry_ctrs) \
579 SymI_NeedsProto(top_ct) \
581 SymI_HasProto(ENT_VIA_NODE_ctr) \
582 SymI_HasProto(ENT_STATIC_THK_ctr) \
583 SymI_HasProto(ENT_DYN_THK_ctr) \
584 SymI_HasProto(ENT_STATIC_FUN_DIRECT_ctr) \
585 SymI_HasProto(ENT_DYN_FUN_DIRECT_ctr) \
586 SymI_HasProto(ENT_STATIC_CON_ctr) \
587 SymI_HasProto(ENT_DYN_CON_ctr) \
588 SymI_HasProto(ENT_STATIC_IND_ctr) \
589 SymI_HasProto(ENT_DYN_IND_ctr) \
590 SymI_HasProto(ENT_PERM_IND_ctr) \
591 SymI_HasProto(ENT_PAP_ctr) \
592 SymI_HasProto(ENT_AP_ctr) \
593 SymI_HasProto(ENT_AP_STACK_ctr) \
594 SymI_HasProto(ENT_BH_ctr) \
595 SymI_HasProto(UNKNOWN_CALL_ctr) \
596 SymI_HasProto(SLOW_CALL_v_ctr) \
597 SymI_HasProto(SLOW_CALL_f_ctr) \
598 SymI_HasProto(SLOW_CALL_d_ctr) \
599 SymI_HasProto(SLOW_CALL_l_ctr) \
600 SymI_HasProto(SLOW_CALL_n_ctr) \
601 SymI_HasProto(SLOW_CALL_p_ctr) \
602 SymI_HasProto(SLOW_CALL_pv_ctr) \
603 SymI_HasProto(SLOW_CALL_pp_ctr) \
604 SymI_HasProto(SLOW_CALL_ppv_ctr) \
605 SymI_HasProto(SLOW_CALL_ppp_ctr) \
606 SymI_HasProto(SLOW_CALL_pppv_ctr) \
607 SymI_HasProto(SLOW_CALL_pppp_ctr) \
608 SymI_HasProto(SLOW_CALL_ppppp_ctr) \
609 SymI_HasProto(SLOW_CALL_pppppp_ctr) \
610 SymI_HasProto(SLOW_CALL_OTHER_ctr) \
611 SymI_HasProto(ticky_slow_call_unevald) \
612 SymI_HasProto(SLOW_CALL_ctr) \
613 SymI_HasProto(MULTI_CHUNK_SLOW_CALL_ctr) \
614 SymI_HasProto(MULTI_CHUNK_SLOW_CALL_CHUNKS_ctr) \
615 SymI_HasProto(KNOWN_CALL_ctr) \
616 SymI_HasProto(KNOWN_CALL_TOO_FEW_ARGS_ctr) \
617 SymI_HasProto(KNOWN_CALL_EXTRA_ARGS_ctr) \
618 SymI_HasProto(SLOW_CALL_FUN_TOO_FEW_ctr) \
619 SymI_HasProto(SLOW_CALL_FUN_CORRECT_ctr) \
620 SymI_HasProto(SLOW_CALL_FUN_TOO_MANY_ctr) \
621 SymI_HasProto(SLOW_CALL_PAP_TOO_FEW_ctr) \
622 SymI_HasProto(SLOW_CALL_PAP_CORRECT_ctr) \
623 SymI_HasProto(SLOW_CALL_PAP_TOO_MANY_ctr) \
624 SymI_HasProto(SLOW_CALL_UNEVALD_ctr) \
625 SymI_HasProto(UPDF_OMITTED_ctr) \
626 SymI_HasProto(UPDF_PUSHED_ctr) \
627 SymI_HasProto(CATCHF_PUSHED_ctr) \
628 SymI_HasProto(UPDF_RCC_PUSHED_ctr) \
629 SymI_HasProto(UPDF_RCC_OMITTED_ctr) \
630 SymI_HasProto(UPD_SQUEEZED_ctr) \
631 SymI_HasProto(UPD_CON_IN_NEW_ctr) \
632 SymI_HasProto(UPD_CON_IN_PLACE_ctr) \
633 SymI_HasProto(UPD_PAP_IN_NEW_ctr) \
634 SymI_HasProto(UPD_PAP_IN_PLACE_ctr) \
635 SymI_HasProto(ALLOC_HEAP_ctr) \
636 SymI_HasProto(ALLOC_HEAP_tot) \
637 SymI_HasProto(ALLOC_FUN_ctr) \
638 SymI_HasProto(ALLOC_FUN_adm) \
639 SymI_HasProto(ALLOC_FUN_gds) \
640 SymI_HasProto(ALLOC_FUN_slp) \
641 SymI_HasProto(UPD_NEW_IND_ctr) \
642 SymI_HasProto(UPD_NEW_PERM_IND_ctr) \
643 SymI_HasProto(UPD_OLD_IND_ctr) \
644 SymI_HasProto(UPD_OLD_PERM_IND_ctr) \
645 SymI_HasProto(UPD_BH_UPDATABLE_ctr) \
646 SymI_HasProto(UPD_BH_SINGLE_ENTRY_ctr) \
647 SymI_HasProto(UPD_CAF_BH_UPDATABLE_ctr) \
648 SymI_HasProto(UPD_CAF_BH_SINGLE_ENTRY_ctr) \
649 SymI_HasProto(GC_SEL_ABANDONED_ctr) \
650 SymI_HasProto(GC_SEL_MINOR_ctr) \
651 SymI_HasProto(GC_SEL_MAJOR_ctr) \
652 SymI_HasProto(GC_FAILED_PROMOTION_ctr) \
653 SymI_HasProto(ALLOC_UP_THK_ctr) \
654 SymI_HasProto(ALLOC_SE_THK_ctr) \
655 SymI_HasProto(ALLOC_THK_adm) \
656 SymI_HasProto(ALLOC_THK_gds) \
657 SymI_HasProto(ALLOC_THK_slp) \
658 SymI_HasProto(ALLOC_CON_ctr) \
659 SymI_HasProto(ALLOC_CON_adm) \
660 SymI_HasProto(ALLOC_CON_gds) \
661 SymI_HasProto(ALLOC_CON_slp) \
662 SymI_HasProto(ALLOC_TUP_ctr) \
663 SymI_HasProto(ALLOC_TUP_adm) \
664 SymI_HasProto(ALLOC_TUP_gds) \
665 SymI_HasProto(ALLOC_TUP_slp) \
666 SymI_HasProto(ALLOC_BH_ctr) \
667 SymI_HasProto(ALLOC_BH_adm) \
668 SymI_HasProto(ALLOC_BH_gds) \
669 SymI_HasProto(ALLOC_BH_slp) \
670 SymI_HasProto(ALLOC_PRIM_ctr) \
671 SymI_HasProto(ALLOC_PRIM_adm) \
672 SymI_HasProto(ALLOC_PRIM_gds) \
673 SymI_HasProto(ALLOC_PRIM_slp) \
674 SymI_HasProto(ALLOC_PAP_ctr) \
675 SymI_HasProto(ALLOC_PAP_adm) \
676 SymI_HasProto(ALLOC_PAP_gds) \
677 SymI_HasProto(ALLOC_PAP_slp) \
678 SymI_HasProto(ALLOC_TSO_ctr) \
679 SymI_HasProto(ALLOC_TSO_adm) \
680 SymI_HasProto(ALLOC_TSO_gds) \
681 SymI_HasProto(ALLOC_TSO_slp) \
682 SymI_HasProto(RET_NEW_ctr) \
683 SymI_HasProto(RET_OLD_ctr) \
684 SymI_HasProto(RET_UNBOXED_TUP_ctr) \
685 SymI_HasProto(RET_SEMI_loads_avoided)
688 // On most platforms, the garbage collector rewrites references
689 // to small integer and char objects to a set of common, shared ones.
691 // We don't do this when compiling to Windows DLLs at the moment because
692 // it doesn't support cross package data references well.
694 #if defined(__PIC__) && defined(mingw32_HOST_OS)
695 #define RTS_INTCHAR_SYMBOLS
697 #define RTS_INTCHAR_SYMBOLS \
698 SymI_HasProto(stg_CHARLIKE_closure) \
699 SymI_HasProto(stg_INTLIKE_closure)
703 #define RTS_SYMBOLS \
706 SymI_HasProto(StgReturn) \
707 SymI_HasProto(stg_enter_info) \
708 SymI_HasProto(stg_gc_void_info) \
709 SymI_HasProto(__stg_gc_enter_1) \
710 SymI_HasProto(stg_gc_noregs) \
711 SymI_HasProto(stg_gc_unpt_r1_info) \
712 SymI_HasProto(stg_gc_unpt_r1) \
713 SymI_HasProto(stg_gc_unbx_r1_info) \
714 SymI_HasProto(stg_gc_unbx_r1) \
715 SymI_HasProto(stg_gc_f1_info) \
716 SymI_HasProto(stg_gc_f1) \
717 SymI_HasProto(stg_gc_d1_info) \
718 SymI_HasProto(stg_gc_d1) \
719 SymI_HasProto(stg_gc_l1_info) \
720 SymI_HasProto(stg_gc_l1) \
721 SymI_HasProto(__stg_gc_fun) \
722 SymI_HasProto(stg_gc_fun_info) \
723 SymI_HasProto(stg_gc_gen) \
724 SymI_HasProto(stg_gc_gen_info) \
725 SymI_HasProto(stg_gc_gen_hp) \
726 SymI_HasProto(stg_gc_ut) \
727 SymI_HasProto(stg_gen_yield) \
728 SymI_HasProto(stg_yield_noregs) \
729 SymI_HasProto(stg_yield_to_interpreter) \
730 SymI_HasProto(stg_gen_block) \
731 SymI_HasProto(stg_block_noregs) \
732 SymI_HasProto(stg_block_1) \
733 SymI_HasProto(stg_block_takemvar) \
734 SymI_HasProto(stg_block_putmvar) \
736 SymI_HasProto(MallocFailHook) \
737 SymI_HasProto(OnExitHook) \
738 SymI_HasProto(OutOfHeapHook) \
739 SymI_HasProto(StackOverflowHook) \
740 SymI_HasProto(addDLL) \
741 SymI_HasProto(__int_encodeDouble) \
742 SymI_HasProto(__word_encodeDouble) \
743 SymI_HasProto(__2Int_encodeDouble) \
744 SymI_HasProto(__int_encodeFloat) \
745 SymI_HasProto(__word_encodeFloat) \
746 SymI_HasProto(stg_atomicallyzh) \
747 SymI_HasProto(barf) \
748 SymI_HasProto(debugBelch) \
749 SymI_HasProto(errorBelch) \
750 SymI_HasProto(sysErrorBelch) \
751 SymI_HasProto(stg_getMaskingStatezh) \
752 SymI_HasProto(stg_maskAsyncExceptionszh) \
753 SymI_HasProto(stg_maskUninterruptiblezh) \
754 SymI_HasProto(stg_catchzh) \
755 SymI_HasProto(stg_catchRetryzh) \
756 SymI_HasProto(stg_catchSTMzh) \
757 SymI_HasProto(stg_checkzh) \
758 SymI_HasProto(closure_flags) \
759 SymI_HasProto(cmp_thread) \
760 SymI_HasProto(createAdjustor) \
761 SymI_HasProto(stg_decodeDoublezu2Intzh) \
762 SymI_HasProto(stg_decodeFloatzuIntzh) \
763 SymI_HasProto(defaultsHook) \
764 SymI_HasProto(stg_delayzh) \
765 SymI_HasProto(stg_deRefWeakzh) \
766 SymI_HasProto(stg_deRefStablePtrzh) \
767 SymI_HasProto(dirty_MUT_VAR) \
768 SymI_HasProto(stg_forkzh) \
769 SymI_HasProto(stg_forkOnzh) \
770 SymI_HasProto(forkProcess) \
771 SymI_HasProto(forkOS_createThread) \
772 SymI_HasProto(freeHaskellFunctionPtr) \
773 SymI_HasProto(getOrSetTypeableStore) \
774 SymI_HasProto(getOrSetGHCConcSignalSignalHandlerStore) \
775 SymI_HasProto(getOrSetGHCConcWindowsPendingDelaysStore) \
776 SymI_HasProto(getOrSetGHCConcWindowsIOManagerThreadStore) \
777 SymI_HasProto(getOrSetGHCConcWindowsProddingStore) \
778 SymI_HasProto(getOrSetSystemEventThreadEventManagerStore) \
779 SymI_HasProto(getOrSetSystemEventThreadIOManagerThreadStore) \
780 SymI_HasProto(genSymZh) \
781 SymI_HasProto(genericRaise) \
782 SymI_HasProto(getProgArgv) \
783 SymI_HasProto(getFullProgArgv) \
784 SymI_HasProto(getStablePtr) \
785 SymI_HasProto(hs_init) \
786 SymI_HasProto(hs_exit) \
787 SymI_HasProto(hs_set_argv) \
788 SymI_HasProto(hs_add_root) \
789 SymI_HasProto(hs_perform_gc) \
790 SymI_HasProto(hs_free_stable_ptr) \
791 SymI_HasProto(hs_free_fun_ptr) \
792 SymI_HasProto(hs_hpc_rootModule) \
793 SymI_HasProto(hs_hpc_module) \
794 SymI_HasProto(initLinker) \
795 SymI_HasProto(stg_unpackClosurezh) \
796 SymI_HasProto(stg_getApStackValzh) \
797 SymI_HasProto(stg_getSparkzh) \
798 SymI_HasProto(stg_numSparkszh) \
799 SymI_HasProto(stg_isCurrentThreadBoundzh) \
800 SymI_HasProto(stg_isEmptyMVarzh) \
801 SymI_HasProto(stg_killThreadzh) \
802 SymI_HasProto(loadArchive) \
803 SymI_HasProto(loadObj) \
804 SymI_HasProto(insertStableSymbol) \
805 SymI_HasProto(insertSymbol) \
806 SymI_HasProto(lookupSymbol) \
807 SymI_HasProto(stg_makeStablePtrzh) \
808 SymI_HasProto(stg_mkApUpd0zh) \
809 SymI_HasProto(stg_myThreadIdzh) \
810 SymI_HasProto(stg_labelThreadzh) \
811 SymI_HasProto(stg_newArrayzh) \
812 SymI_HasProto(stg_newBCOzh) \
813 SymI_HasProto(stg_newByteArrayzh) \
814 SymI_HasProto_redirect(newCAF, newDynCAF) \
815 SymI_HasProto(stg_newMVarzh) \
816 SymI_HasProto(stg_newMutVarzh) \
817 SymI_HasProto(stg_newTVarzh) \
818 SymI_HasProto(stg_noDuplicatezh) \
819 SymI_HasProto(stg_atomicModifyMutVarzh) \
820 SymI_HasProto(stg_newPinnedByteArrayzh) \
821 SymI_HasProto(stg_newAlignedPinnedByteArrayzh) \
822 SymI_HasProto(newSpark) \
823 SymI_HasProto(performGC) \
824 SymI_HasProto(performMajorGC) \
825 SymI_HasProto(prog_argc) \
826 SymI_HasProto(prog_argv) \
827 SymI_HasProto(stg_putMVarzh) \
828 SymI_HasProto(stg_raisezh) \
829 SymI_HasProto(stg_raiseIOzh) \
830 SymI_HasProto(stg_readTVarzh) \
831 SymI_HasProto(stg_readTVarIOzh) \
832 SymI_HasProto(resumeThread) \
833 SymI_HasProto(resolveObjs) \
834 SymI_HasProto(stg_retryzh) \
835 SymI_HasProto(rts_apply) \
836 SymI_HasProto(rts_checkSchedStatus) \
837 SymI_HasProto(rts_eval) \
838 SymI_HasProto(rts_evalIO) \
839 SymI_HasProto(rts_evalLazyIO) \
840 SymI_HasProto(rts_evalStableIO) \
841 SymI_HasProto(rts_eval_) \
842 SymI_HasProto(rts_getBool) \
843 SymI_HasProto(rts_getChar) \
844 SymI_HasProto(rts_getDouble) \
845 SymI_HasProto(rts_getFloat) \
846 SymI_HasProto(rts_getInt) \
847 SymI_HasProto(rts_getInt8) \
848 SymI_HasProto(rts_getInt16) \
849 SymI_HasProto(rts_getInt32) \
850 SymI_HasProto(rts_getInt64) \
851 SymI_HasProto(rts_getPtr) \
852 SymI_HasProto(rts_getFunPtr) \
853 SymI_HasProto(rts_getStablePtr) \
854 SymI_HasProto(rts_getThreadId) \
855 SymI_HasProto(rts_getWord) \
856 SymI_HasProto(rts_getWord8) \
857 SymI_HasProto(rts_getWord16) \
858 SymI_HasProto(rts_getWord32) \
859 SymI_HasProto(rts_getWord64) \
860 SymI_HasProto(rts_lock) \
861 SymI_HasProto(rts_mkBool) \
862 SymI_HasProto(rts_mkChar) \
863 SymI_HasProto(rts_mkDouble) \
864 SymI_HasProto(rts_mkFloat) \
865 SymI_HasProto(rts_mkInt) \
866 SymI_HasProto(rts_mkInt8) \
867 SymI_HasProto(rts_mkInt16) \
868 SymI_HasProto(rts_mkInt32) \
869 SymI_HasProto(rts_mkInt64) \
870 SymI_HasProto(rts_mkPtr) \
871 SymI_HasProto(rts_mkFunPtr) \
872 SymI_HasProto(rts_mkStablePtr) \
873 SymI_HasProto(rts_mkString) \
874 SymI_HasProto(rts_mkWord) \
875 SymI_HasProto(rts_mkWord8) \
876 SymI_HasProto(rts_mkWord16) \
877 SymI_HasProto(rts_mkWord32) \
878 SymI_HasProto(rts_mkWord64) \
879 SymI_HasProto(rts_unlock) \
880 SymI_HasProto(rts_unsafeGetMyCapability) \
881 SymI_HasProto(rtsSupportsBoundThreads) \
882 SymI_HasProto(rts_isProfiled) \
883 SymI_HasProto(setProgArgv) \
884 SymI_HasProto(startupHaskell) \
885 SymI_HasProto(shutdownHaskell) \
886 SymI_HasProto(shutdownHaskellAndExit) \
887 SymI_HasProto(stable_ptr_table) \
888 SymI_HasProto(stackOverflow) \
889 SymI_HasProto(stg_CAF_BLACKHOLE_info) \
890 SymI_HasProto(stg_BLACKHOLE_info) \
891 SymI_HasProto(__stg_EAGER_BLACKHOLE_info) \
892 SymI_HasProto(stg_BLOCKING_QUEUE_CLEAN_info) \
893 SymI_HasProto(stg_BLOCKING_QUEUE_DIRTY_info) \
894 SymI_HasProto(startTimer) \
895 SymI_HasProto(stg_MVAR_CLEAN_info) \
896 SymI_HasProto(stg_MVAR_DIRTY_info) \
897 SymI_HasProto(stg_IND_STATIC_info) \
898 SymI_HasProto(stg_ARR_WORDS_info) \
899 SymI_HasProto(stg_MUT_ARR_PTRS_DIRTY_info) \
900 SymI_HasProto(stg_MUT_ARR_PTRS_FROZEN_info) \
901 SymI_HasProto(stg_MUT_ARR_PTRS_FROZEN0_info) \
902 SymI_HasProto(stg_WEAK_info) \
903 SymI_HasProto(stg_ap_v_info) \
904 SymI_HasProto(stg_ap_f_info) \
905 SymI_HasProto(stg_ap_d_info) \
906 SymI_HasProto(stg_ap_l_info) \
907 SymI_HasProto(stg_ap_n_info) \
908 SymI_HasProto(stg_ap_p_info) \
909 SymI_HasProto(stg_ap_pv_info) \
910 SymI_HasProto(stg_ap_pp_info) \
911 SymI_HasProto(stg_ap_ppv_info) \
912 SymI_HasProto(stg_ap_ppp_info) \
913 SymI_HasProto(stg_ap_pppv_info) \
914 SymI_HasProto(stg_ap_pppp_info) \
915 SymI_HasProto(stg_ap_ppppp_info) \
916 SymI_HasProto(stg_ap_pppppp_info) \
917 SymI_HasProto(stg_ap_0_fast) \
918 SymI_HasProto(stg_ap_v_fast) \
919 SymI_HasProto(stg_ap_f_fast) \
920 SymI_HasProto(stg_ap_d_fast) \
921 SymI_HasProto(stg_ap_l_fast) \
922 SymI_HasProto(stg_ap_n_fast) \
923 SymI_HasProto(stg_ap_p_fast) \
924 SymI_HasProto(stg_ap_pv_fast) \
925 SymI_HasProto(stg_ap_pp_fast) \
926 SymI_HasProto(stg_ap_ppv_fast) \
927 SymI_HasProto(stg_ap_ppp_fast) \
928 SymI_HasProto(stg_ap_pppv_fast) \
929 SymI_HasProto(stg_ap_pppp_fast) \
930 SymI_HasProto(stg_ap_ppppp_fast) \
931 SymI_HasProto(stg_ap_pppppp_fast) \
932 SymI_HasProto(stg_ap_1_upd_info) \
933 SymI_HasProto(stg_ap_2_upd_info) \
934 SymI_HasProto(stg_ap_3_upd_info) \
935 SymI_HasProto(stg_ap_4_upd_info) \
936 SymI_HasProto(stg_ap_5_upd_info) \
937 SymI_HasProto(stg_ap_6_upd_info) \
938 SymI_HasProto(stg_ap_7_upd_info) \
939 SymI_HasProto(stg_exit) \
940 SymI_HasProto(stg_sel_0_upd_info) \
941 SymI_HasProto(stg_sel_10_upd_info) \
942 SymI_HasProto(stg_sel_11_upd_info) \
943 SymI_HasProto(stg_sel_12_upd_info) \
944 SymI_HasProto(stg_sel_13_upd_info) \
945 SymI_HasProto(stg_sel_14_upd_info) \
946 SymI_HasProto(stg_sel_15_upd_info) \
947 SymI_HasProto(stg_sel_1_upd_info) \
948 SymI_HasProto(stg_sel_2_upd_info) \
949 SymI_HasProto(stg_sel_3_upd_info) \
950 SymI_HasProto(stg_sel_4_upd_info) \
951 SymI_HasProto(stg_sel_5_upd_info) \
952 SymI_HasProto(stg_sel_6_upd_info) \
953 SymI_HasProto(stg_sel_7_upd_info) \
954 SymI_HasProto(stg_sel_8_upd_info) \
955 SymI_HasProto(stg_sel_9_upd_info) \
956 SymI_HasProto(stg_upd_frame_info) \
957 SymI_HasProto(stg_bh_upd_frame_info) \
958 SymI_HasProto(suspendThread) \
959 SymI_HasProto(stg_takeMVarzh) \
960 SymI_HasProto(stg_threadStatuszh) \
961 SymI_HasProto(stg_tryPutMVarzh) \
962 SymI_HasProto(stg_tryTakeMVarzh) \
963 SymI_HasProto(stg_unmaskAsyncExceptionszh) \
964 SymI_HasProto(unloadObj) \
965 SymI_HasProto(stg_unsafeThawArrayzh) \
966 SymI_HasProto(stg_waitReadzh) \
967 SymI_HasProto(stg_waitWritezh) \
968 SymI_HasProto(stg_writeTVarzh) \
969 SymI_HasProto(stg_yieldzh) \
970 SymI_NeedsProto(stg_interp_constr_entry) \
971 SymI_HasProto(stg_arg_bitmaps) \
972 SymI_HasProto(alloc_blocks_lim) \
974 SymI_HasProto(allocate) \
975 SymI_HasProto(allocateExec) \
976 SymI_HasProto(freeExec) \
977 SymI_HasProto(getAllocations) \
978 SymI_HasProto(revertCAFs) \
979 SymI_HasProto(RtsFlags) \
980 SymI_NeedsProto(rts_breakpoint_io_action) \
981 SymI_NeedsProto(rts_stop_next_breakpoint) \
982 SymI_NeedsProto(rts_stop_on_exception) \
983 SymI_HasProto(stopTimer) \
984 SymI_HasProto(n_capabilities) \
985 SymI_HasProto(stg_traceCcszh) \
986 SymI_HasProto(stg_traceEventzh) \
987 RTS_USER_SIGNALS_SYMBOLS \
991 // 64-bit support functions in libgcc.a
992 #if defined(__GNUC__) && SIZEOF_VOID_P <= 4
993 #define RTS_LIBGCC_SYMBOLS \
994 SymI_NeedsProto(__divdi3) \
995 SymI_NeedsProto(__udivdi3) \
996 SymI_NeedsProto(__moddi3) \
997 SymI_NeedsProto(__umoddi3) \
998 SymI_NeedsProto(__muldi3) \
999 SymI_NeedsProto(__ashldi3) \
1000 SymI_NeedsProto(__ashrdi3) \
1001 SymI_NeedsProto(__lshrdi3)
1003 #define RTS_LIBGCC_SYMBOLS
1006 #if defined(darwin_HOST_OS) && defined(powerpc_HOST_ARCH)
1007 // Symbols that don't have a leading underscore
1008 // on Mac OS X. They have to receive special treatment,
1009 // see machoInitSymbolsWithoutUnderscore()
1010 #define RTS_MACHO_NOUNDERLINE_SYMBOLS \
1011 SymI_NeedsProto(saveFP) \
1012 SymI_NeedsProto(restFP)
1015 /* entirely bogus claims about types of these symbols */
1016 #define SymI_NeedsProto(vvv) extern void vvv(void);
1017 #if defined(__PIC__) && defined(mingw32_HOST_OS)
1018 #define SymE_HasProto(vvv) SymE_HasProto(vvv);
1019 #define SymE_NeedsProto(vvv) extern void _imp__ ## vvv (void);
1021 #define SymE_NeedsProto(vvv) SymI_NeedsProto(vvv);
1022 #define SymE_HasProto(vvv) SymI_HasProto(vvv)
1024 #define SymI_HasProto(vvv) /**/
1025 #define SymI_HasProto_redirect(vvv,xxx) /**/
1028 RTS_POSIX_ONLY_SYMBOLS
1029 RTS_MINGW_ONLY_SYMBOLS
1030 RTS_CYGWIN_ONLY_SYMBOLS
1031 RTS_DARWIN_ONLY_SYMBOLS
1034 #undef SymI_NeedsProto
1035 #undef SymI_HasProto
1036 #undef SymI_HasProto_redirect
1037 #undef SymE_HasProto
1038 #undef SymE_NeedsProto
1040 #ifdef LEADING_UNDERSCORE
1041 #define MAYBE_LEADING_UNDERSCORE_STR(s) ("_" s)
1043 #define MAYBE_LEADING_UNDERSCORE_STR(s) (s)
1046 #define SymI_HasProto(vvv) { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
1048 #define SymE_HasProto(vvv) { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
1049 (void*)DLL_IMPORT_DATA_REF(vvv) },
1051 #define SymI_NeedsProto(vvv) SymI_HasProto(vvv)
1052 #define SymE_NeedsProto(vvv) SymE_HasProto(vvv)
1054 // SymI_HasProto_redirect allows us to redirect references to one symbol to
1055 // another symbol. See newCAF/newDynCAF for an example.
1056 #define SymI_HasProto_redirect(vvv,xxx) \
1057 { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
1060 static RtsSymbolVal rtsSyms[] = {
1063 RTS_POSIX_ONLY_SYMBOLS
1064 RTS_MINGW_ONLY_SYMBOLS
1065 RTS_CYGWIN_ONLY_SYMBOLS
1066 RTS_DARWIN_ONLY_SYMBOLS
1069 #if defined(darwin_HOST_OS) && defined(i386_HOST_ARCH)
1070 // dyld stub code contains references to this,
1071 // but it should never be called because we treat
1072 // lazy pointers as nonlazy.
1073 { "dyld_stub_binding_helper", (void*)0xDEADBEEF },
1075 { 0, 0 } /* sentinel */
1080 /* -----------------------------------------------------------------------------
1081 * Insert symbols into hash tables, checking for duplicates.
1084 static void ghciInsertStrHashTable ( char* obj_name,
1090 if (lookupHashTable(table, (StgWord)key) == NULL)
1092 insertStrHashTable(table, (StgWord)key, data);
1097 "GHCi runtime linker: fatal error: I found a duplicate definition for symbol\n"
1099 "whilst processing object file\n"
1101 "This could be caused by:\n"
1102 " * Loading two different object files which export the same symbol\n"
1103 " * Specifying the same object file twice on the GHCi command line\n"
1104 " * An incorrect `package.conf' entry, causing some object to be\n"
1106 "GHCi cannot safely continue in this situation. Exiting now. Sorry.\n"
1113 /* -----------------------------------------------------------------------------
1114 * initialize the object linker
1118 static int linker_init_done = 0 ;
1120 #if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1121 static void *dl_prog_handle;
1122 static regex_t re_invalid;
1123 static regex_t re_realso;
1125 static Mutex dl_mutex; // mutex to protect dlopen/dlerror critical section
1133 #if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1137 /* Make initLinker idempotent, so we can call it
1138 before evey relevant operation; that means we
1139 don't need to initialise the linker separately */
1140 if (linker_init_done == 1) { return; } else {
1141 linker_init_done = 1;
1144 #if defined(THREADED_RTS) && (defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO))
1145 initMutex(&dl_mutex);
1147 stablehash = allocStrHashTable();
1148 symhash = allocStrHashTable();
1150 /* populate the symbol table with stuff from the RTS */
1151 for (sym = rtsSyms; sym->lbl != NULL; sym++) {
1152 ghciInsertStrHashTable("(GHCi built-in symbols)",
1153 symhash, sym->lbl, sym->addr);
1155 # if defined(OBJFORMAT_MACHO) && defined(powerpc_HOST_ARCH)
1156 machoInitSymbolsWithoutUnderscore();
1159 # if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1160 # if defined(RTLD_DEFAULT)
1161 dl_prog_handle = RTLD_DEFAULT;
1163 dl_prog_handle = dlopen(NULL, RTLD_LAZY);
1164 # endif /* RTLD_DEFAULT */
1166 compileResult = regcomp(&re_invalid,
1167 "(([^ \t()])+\\.so([^ \t:()])*):([ \t])*invalid ELF header",
1169 ASSERT( compileResult == 0 );
1170 compileResult = regcomp(&re_realso,
1171 "GROUP *\\( *(([^ )])+)",
1173 ASSERT( compileResult == 0 );
1176 #if !defined(ALWAYS_PIC) && defined(x86_64_HOST_ARCH)
1177 if (RtsFlags.MiscFlags.linkerMemBase != 0) {
1178 // User-override for mmap_32bit_base
1179 mmap_32bit_base = (void*)RtsFlags.MiscFlags.linkerMemBase;
1183 #if defined(mingw32_HOST_OS)
1185 * These two libraries cause problems when added to the static link,
1186 * but are necessary for resolving symbols in GHCi, hence we load
1187 * them manually here.
1195 exitLinker( void ) {
1196 #if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1197 if (linker_init_done == 1) {
1198 regfree(&re_invalid);
1199 regfree(&re_realso);
1201 closeMutex(&dl_mutex);
1207 /* -----------------------------------------------------------------------------
1208 * Loading DLL or .so dynamic libraries
1209 * -----------------------------------------------------------------------------
1211 * Add a DLL from which symbols may be found. In the ELF case, just
1212 * do RTLD_GLOBAL-style add, so no further messing around needs to
1213 * happen in order that symbols in the loaded .so are findable --
1214 * lookupSymbol() will subsequently see them by dlsym on the program's
1215 * dl-handle. Returns NULL if success, otherwise ptr to an err msg.
1217 * In the PEi386 case, open the DLLs and put handles to them in a
1218 * linked list. When looking for a symbol, try all handles in the
1219 * list. This means that we need to load even DLLs that are guaranteed
1220 * to be in the ghc.exe image already, just so we can get a handle
1221 * to give to loadSymbol, so that we can find the symbols. For such
1222 * libraries, the LoadLibrary call should be a no-op except for returning
1227 #if defined(OBJFORMAT_PEi386)
1228 /* A record for storing handles into DLLs. */
1233 struct _OpenedDLL* next;
1238 /* A list thereof. */
1239 static OpenedDLL* opened_dlls = NULL;
1242 # if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1245 internal_dlopen(const char *dll_name)
1251 // omitted: RTLD_NOW
1252 // see http://www.haskell.org/pipermail/cvs-ghc/2007-September/038570.html
1254 debugBelch("internal_dlopen: dll_name = '%s'\n", dll_name));
1256 //-------------- Begin critical section ------------------
1257 // This critical section is necessary because dlerror() is not
1258 // required to be reentrant (see POSIX -- IEEE Std 1003.1-2008)
1259 // Also, the error message returned must be copied to preserve it
1262 ACQUIRE_LOCK(&dl_mutex);
1263 hdl = dlopen(dll_name, RTLD_LAZY | RTLD_GLOBAL);
1267 /* dlopen failed; return a ptr to the error msg. */
1269 if (errmsg == NULL) errmsg = "addDLL: unknown error";
1270 errmsg_copy = stgMallocBytes(strlen(errmsg)+1, "addDLL");
1271 strcpy(errmsg_copy, errmsg);
1272 errmsg = errmsg_copy;
1274 RELEASE_LOCK(&dl_mutex);
1275 //--------------- End critical section -------------------
1282 addDLL( char *dll_name )
1284 # if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1285 /* ------------------- ELF DLL loader ------------------- */
1288 regmatch_t match[NMATCH];
1291 size_t match_length;
1292 #define MAXLINE 1000
1298 IF_DEBUG(linker, debugBelch("addDLL: dll_name = '%s'\n", dll_name));
1299 errmsg = internal_dlopen(dll_name);
1301 if (errmsg == NULL) {
1305 // GHC Trac ticket #2615
1306 // On some systems (e.g., Gentoo Linux) dynamic files (e.g. libc.so)
1307 // contain linker scripts rather than ELF-format object code. This
1308 // code handles the situation by recognizing the real object code
1309 // file name given in the linker script.
1311 // If an "invalid ELF header" error occurs, it is assumed that the
1312 // .so file contains a linker script instead of ELF object code.
1313 // In this case, the code looks for the GROUP ( ... ) linker
1314 // directive. If one is found, the first file name inside the
1315 // parentheses is treated as the name of a dynamic library and the
1316 // code attempts to dlopen that file. If this is also unsuccessful,
1317 // an error message is returned.
1319 // see if the error message is due to an invalid ELF header
1320 IF_DEBUG(linker, debugBelch("errmsg = '%s'\n", errmsg));
1321 result = regexec(&re_invalid, errmsg, (size_t) NMATCH, match, 0);
1322 IF_DEBUG(linker, debugBelch("result = %i\n", result));
1324 // success -- try to read the named file as a linker script
1325 match_length = (size_t) stg_min((match[1].rm_eo - match[1].rm_so),
1327 strncpy(line, (errmsg+(match[1].rm_so)),match_length);
1328 line[match_length] = '\0'; // make sure string is null-terminated
1329 IF_DEBUG(linker, debugBelch ("file name = '%s'\n", line));
1330 if ((fp = fopen(line, "r")) == NULL) {
1331 return errmsg; // return original error if open fails
1333 // try to find a GROUP ( ... ) command
1334 while (fgets(line, MAXLINE, fp) != NULL) {
1335 IF_DEBUG(linker, debugBelch("input line = %s", line));
1336 if (regexec(&re_realso, line, (size_t) NMATCH, match, 0) == 0) {
1337 // success -- try to dlopen the first named file
1338 IF_DEBUG(linker, debugBelch("match%s\n",""));
1339 line[match[1].rm_eo] = '\0';
1340 errmsg = internal_dlopen(line+match[1].rm_so);
1343 // if control reaches here, no GROUP ( ... ) directive was found
1344 // and the original error message is returned to the caller
1350 # elif defined(OBJFORMAT_PEi386)
1351 /* ------------------- Win32 DLL loader ------------------- */
1359 /* debugBelch("\naddDLL; dll_name = `%s'\n", dll_name); */
1361 /* See if we've already got it, and ignore if so. */
1362 for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next) {
1363 if (0 == strcmp(o_dll->name, dll_name))
1367 /* The file name has no suffix (yet) so that we can try
1368 both foo.dll and foo.drv
1370 The documentation for LoadLibrary says:
1371 If no file name extension is specified in the lpFileName
1372 parameter, the default library extension .dll is
1373 appended. However, the file name string can include a trailing
1374 point character (.) to indicate that the module name has no
1377 buf = stgMallocBytes(strlen(dll_name) + 10, "addDLL");
1378 sprintf(buf, "%s.DLL", dll_name);
1379 instance = LoadLibrary(buf);
1380 if (instance == NULL) {
1381 if (GetLastError() != ERROR_MOD_NOT_FOUND) goto error;
1382 // KAA: allow loading of drivers (like winspool.drv)
1383 sprintf(buf, "%s.DRV", dll_name);
1384 instance = LoadLibrary(buf);
1385 if (instance == NULL) {
1386 if (GetLastError() != ERROR_MOD_NOT_FOUND) goto error;
1387 // #1883: allow loading of unix-style libfoo.dll DLLs
1388 sprintf(buf, "lib%s.DLL", dll_name);
1389 instance = LoadLibrary(buf);
1390 if (instance == NULL) {
1397 /* Add this DLL to the list of DLLs in which to search for symbols. */
1398 o_dll = stgMallocBytes( sizeof(OpenedDLL), "addDLL" );
1399 o_dll->name = stgMallocBytes(1+strlen(dll_name), "addDLL");
1400 strcpy(o_dll->name, dll_name);
1401 o_dll->instance = instance;
1402 o_dll->next = opened_dlls;
1403 opened_dlls = o_dll;
1409 sysErrorBelch(dll_name);
1411 /* LoadLibrary failed; return a ptr to the error msg. */
1412 return "addDLL: could not load DLL";
1415 barf("addDLL: not implemented on this platform");
1419 /* -----------------------------------------------------------------------------
1420 * insert a stable symbol in the hash table
1424 insertStableSymbol(char* obj_name, char* key, StgPtr p)
1426 ghciInsertStrHashTable(obj_name, stablehash, key, getStablePtr(p));
1430 /* -----------------------------------------------------------------------------
1431 * insert a symbol in the hash table
1434 insertSymbol(char* obj_name, char* key, void* data)
1436 ghciInsertStrHashTable(obj_name, symhash, key, data);
1439 /* -----------------------------------------------------------------------------
1440 * lookup a symbol in the hash table
1443 lookupSymbol( char *lbl )
1447 ASSERT(symhash != NULL);
1448 val = lookupStrHashTable(symhash, lbl);
1451 # if defined(OBJFORMAT_ELF)
1452 return dlsym(dl_prog_handle, lbl);
1453 # elif defined(OBJFORMAT_MACHO)
1455 /* On OS X 10.3 and later, we use dlsym instead of the old legacy
1458 HACK: On OS X, global symbols are prefixed with an underscore.
1459 However, dlsym wants us to omit the leading underscore from the
1460 symbol name. For now, we simply strip it off here (and ONLY
1463 ASSERT(lbl[0] == '_');
1464 return dlsym(dl_prog_handle, lbl+1);
1466 if(NSIsSymbolNameDefined(lbl)) {
1467 NSSymbol symbol = NSLookupAndBindSymbol(lbl);
1468 return NSAddressOfSymbol(symbol);
1472 # endif /* HAVE_DLFCN_H */
1473 # elif defined(OBJFORMAT_PEi386)
1476 sym = lookupSymbolInDLLs((unsigned char*)lbl);
1477 if (sym != NULL) { return sym; };
1479 // Also try looking up the symbol without the @N suffix. Some
1480 // DLLs have the suffixes on their symbols, some don't.
1481 zapTrailingAtSign ( (unsigned char*)lbl );
1482 sym = lookupSymbolInDLLs((unsigned char*)lbl);
1483 if (sym != NULL) { return sym; };
1495 /* -----------------------------------------------------------------------------
1496 * Debugging aid: look in GHCi's object symbol tables for symbols
1497 * within DELTA bytes of the specified address, and show their names.
1500 void ghci_enquire ( char* addr );
1502 void ghci_enquire ( char* addr )
1507 const int DELTA = 64;
1512 for (oc = objects; oc; oc = oc->next) {
1513 for (i = 0; i < oc->n_symbols; i++) {
1514 sym = oc->symbols[i];
1515 if (sym == NULL) continue;
1518 a = lookupStrHashTable(symhash, sym);
1521 // debugBelch("ghci_enquire: can't find %s\n", sym);
1523 else if (addr-DELTA <= a && a <= addr+DELTA) {
1524 debugBelch("%p + %3d == `%s'\n", addr, (int)(a - addr), sym);
1532 #define ROUND_UP(x,size) ((x + size - 1) & ~(size - 1))
1535 mmapForLinker (size_t bytes, nat flags, int fd)
1537 void *map_addr = NULL;
1540 static nat fixed = 0;
1542 pagesize = getpagesize();
1543 size = ROUND_UP(bytes, pagesize);
1545 #if !defined(ALWAYS_PIC) && defined(x86_64_HOST_ARCH)
1548 if (mmap_32bit_base != 0) {
1549 map_addr = mmap_32bit_base;
1553 result = mmap(map_addr, size, PROT_EXEC|PROT_READ|PROT_WRITE,
1554 MAP_PRIVATE|TRY_MAP_32BIT|fixed|flags, fd, 0);
1556 if (result == MAP_FAILED) {
1557 sysErrorBelch("mmap %lu bytes at %p",(lnat)size,map_addr);
1558 errorBelch("Try specifying an address with +RTS -xm<addr> -RTS");
1559 stg_exit(EXIT_FAILURE);
1562 #if !defined(ALWAYS_PIC) && defined(x86_64_HOST_ARCH)
1563 if (mmap_32bit_base != 0) {
1564 if (result == map_addr) {
1565 mmap_32bit_base = (StgWord8*)map_addr + size;
1567 if ((W_)result > 0x80000000) {
1568 // oops, we were given memory over 2Gb
1569 #if defined(freebsd_HOST_OS) || defined(dragonfly_HOST_OS)
1570 // Some platforms require MAP_FIXED. This is normally
1571 // a bad idea, because MAP_FIXED will overwrite
1572 // existing mappings.
1573 munmap(result,size);
1577 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);
1580 // hmm, we were given memory somewhere else, but it's
1581 // still under 2Gb so we can use it. Next time, ask
1582 // for memory right after the place we just got some
1583 mmap_32bit_base = (StgWord8*)result + size;
1587 if ((W_)result > 0x80000000) {
1588 // oops, we were given memory over 2Gb
1589 // ... try allocating memory somewhere else?;
1590 debugTrace(DEBUG_linker,"MAP_32BIT didn't work; gave us %lu bytes at 0x%p", bytes, result);
1591 munmap(result, size);
1593 // Set a base address and try again... (guess: 1Gb)
1594 mmap_32bit_base = (void*)0x40000000;
1605 mkOc( char *path, char *image, int imageSize
1607 #ifdef darwin_HOST_OS
1614 oc = stgMallocBytes(sizeof(ObjectCode), "loadArchive(oc)");
1616 # if defined(OBJFORMAT_ELF)
1617 oc->formatName = "ELF";
1618 # elif defined(OBJFORMAT_PEi386)
1619 oc->formatName = "PEi386";
1620 # elif defined(OBJFORMAT_MACHO)
1621 oc->formatName = "Mach-O";
1624 barf("loadObj: not implemented on this platform");
1628 /* sigh, strdup() isn't a POSIX function, so do it the long way */
1629 /* XXX What should this be for an archive? */
1630 oc->fileName = stgMallocBytes( strlen(path)+1, "loadObj" );
1631 strcpy(oc->fileName, path);
1633 oc->fileSize = imageSize;
1635 oc->sections = NULL;
1636 oc->proddables = NULL;
1639 #ifdef darwin_HOST_OS
1640 oc->misalignment = misalignment;
1644 /* chain it onto the list of objects */
1651 #if defined(USE_ARCHIVES_FOR_GHCI)
1653 loadArchive( char *path )
1660 size_t fileNameSize;
1666 IF_DEBUG(linker, debugBelch("loadArchive `%s'\n", path));
1669 file = stgMallocBytes(fileSize, "loadArchive(file)");
1671 f = fopen(path, "rb");
1673 barf("loadObj: can't read `%s'", path);
1675 n = fread ( tmp, 1, 8, f );
1676 if (strncmp(tmp, "!<arch>\n", 8) != 0)
1677 barf("loadArchive: Not an archive: `%s'", path);
1680 n = fread ( file, 1, 16, f );
1686 barf("loadArchive: Failed reading file name from `%s'", path);
1689 n = fread ( tmp, 1, 12, f );
1691 barf("loadArchive: Failed reading mod time from `%s'", path);
1692 n = fread ( tmp, 1, 6, f );
1694 barf("loadArchive: Failed reading owner from `%s'", path);
1695 n = fread ( tmp, 1, 6, f );
1697 barf("loadArchive: Failed reading group from `%s'", path);
1698 n = fread ( tmp, 1, 8, f );
1700 barf("loadArchive: Failed reading mode from `%s'", path);
1701 n = fread ( tmp, 1, 10, f );
1703 barf("loadArchive: Failed reading size from `%s'", path);
1705 for (n = 0; isdigit(tmp[n]); n++);
1707 imageSize = atoi(tmp);
1708 n = fread ( tmp, 1, 2, f );
1709 if (strncmp(tmp, "\x60\x0A", 2) != 0)
1710 barf("loadArchive: Failed reading magic from `%s' at %ld. Got %c%c", path, ftell(f), tmp[0], tmp[1]);
1712 /* Check for BSD-variant large filenames */
1713 if (0 == strncmp(file, "#1/", 3)) {
1715 for (n = 3; isdigit(file[n]); n++);
1717 fileNameSize = atoi(file + 3);
1718 imageSize -= fileNameSize;
1719 if (fileNameSize > fileSize) {
1720 /* Double it to avoid potentially continually
1721 increasing it by 1 */
1722 fileSize = fileNameSize * 2;
1723 file = stgReallocBytes(file, fileSize, "loadArchive(file)");
1725 n = fread ( file, 1, fileNameSize, f );
1726 if (n != (int)fileNameSize)
1727 barf("loadArchive: Failed reading filename from `%s'", path);
1734 for (n = 0; n < (int)fileNameSize - 1; n++) {
1735 if ((file[n] == '.') && (file[n + 1] == 'o')) {
1742 /* We can't mmap from the archive directly, as object
1743 files need to be 8-byte aligned but files in .ar
1744 archives are 2-byte aligned, and if we malloc the
1745 memory then we can be given memory above 2^32, so we
1746 mmap some anonymous memory and use that. We could
1748 image = mmapForLinker(imageSize, MAP_ANONYMOUS, -1);
1749 n = fread ( image, 1, imageSize, f );
1751 barf("loadObj: error whilst reading `%s'", path);
1752 oc = mkOc(path, image, imageSize
1754 #ifdef darwin_HOST_OS
1759 if (0 == loadOc(oc)) {
1765 n = fseek(f, imageSize, SEEK_CUR);
1767 barf("loadArchive: error whilst seeking by %d in `%s'",
1770 /* .ar files are 2-byte aligned */
1771 if (imageSize % 2) {
1772 n = fread ( tmp, 1, 1, f );
1778 barf("loadArchive: Failed reading padding from `%s'", path);
1790 HsInt GNU_ATTRIBUTE(__noreturn__)
1791 loadArchive( char *path STG_UNUSED ) {
1792 barf("loadArchive: not enabled");
1796 /* -----------------------------------------------------------------------------
1797 * Load an obj (populate the global symbol table, but don't resolve yet)
1799 * Returns: 1 if ok, 0 on error.
1802 loadObj( char *path )
1814 IF_DEBUG(linker, debugBelch("loadObj %s\n", path));
1818 /* debugBelch("loadObj %s\n", path ); */
1820 /* Check that we haven't already loaded this object.
1821 Ignore requests to load multiple times */
1825 for (o = objects; o; o = o->next) {
1826 if (0 == strcmp(o->fileName, path)) {
1828 break; /* don't need to search further */
1832 IF_DEBUG(linker, debugBelch(
1833 "GHCi runtime linker: warning: looks like you're trying to load the\n"
1834 "same object file twice:\n"
1836 "GHCi will ignore this, but be warned.\n"
1838 return 1; /* success */
1842 r = stat(path, &st);
1844 IF_DEBUG(linker, debugBelch("File doesn't exist\n"));
1848 fileSize = st.st_size;
1851 /* On many architectures malloc'd memory isn't executable, so we need to use mmap. */
1853 #if defined(openbsd_HOST_OS)
1854 fd = open(path, O_RDONLY, S_IRUSR);
1856 fd = open(path, O_RDONLY);
1859 barf("loadObj: can't open `%s'", path);
1861 image = mmapForLinker(fileSize, 0, fd);
1865 #else /* !USE_MMAP */
1866 /* load the image into memory */
1867 f = fopen(path, "rb");
1869 barf("loadObj: can't read `%s'", path);
1871 # if defined(mingw32_HOST_OS)
1872 // TODO: We would like to use allocateExec here, but allocateExec
1873 // cannot currently allocate blocks large enough.
1874 image = VirtualAlloc(NULL, fileSize, MEM_RESERVE | MEM_COMMIT,
1875 PAGE_EXECUTE_READWRITE);
1876 # elif defined(darwin_HOST_OS)
1877 // In a Mach-O .o file, all sections can and will be misaligned
1878 // if the total size of the headers is not a multiple of the
1879 // desired alignment. This is fine for .o files that only serve
1880 // as input for the static linker, but it's not fine for us,
1881 // as SSE (used by gcc for floating point) and Altivec require
1882 // 16-byte alignment.
1883 // We calculate the correct alignment from the header before
1884 // reading the file, and then we misalign image on purpose so
1885 // that the actual sections end up aligned again.
1886 misalignment = machoGetMisalignment(f);
1887 image = stgMallocBytes(fileSize + misalignment, "loadObj(image)");
1888 image += misalignment;
1890 image = stgMallocBytes(fileSize, "loadObj(image)");
1895 n = fread ( image, 1, fileSize, f );
1897 barf("loadObj: error whilst reading `%s'", path);
1900 #endif /* USE_MMAP */
1902 oc = mkOc(path, image, fileSize
1904 #ifdef darwin_HOST_OS
1914 loadOc( ObjectCode* oc ) {
1917 IF_DEBUG(linker, debugBelch("loadOc\n"));
1919 # if defined(OBJFORMAT_MACHO) && (defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH))
1920 r = ocAllocateSymbolExtras_MachO ( oc );
1922 IF_DEBUG(linker, debugBelch("ocAllocateSymbolExtras_MachO failed\n"));
1925 # elif defined(OBJFORMAT_ELF) && (defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH))
1926 r = ocAllocateSymbolExtras_ELF ( oc );
1928 IF_DEBUG(linker, debugBelch("ocAllocateSymbolExtras_ELF failed\n"));
1933 /* verify the in-memory image */
1934 # if defined(OBJFORMAT_ELF)
1935 r = ocVerifyImage_ELF ( oc );
1936 # elif defined(OBJFORMAT_PEi386)
1937 r = ocVerifyImage_PEi386 ( oc );
1938 # elif defined(OBJFORMAT_MACHO)
1939 r = ocVerifyImage_MachO ( oc );
1941 barf("loadObj: no verify method");
1944 IF_DEBUG(linker, debugBelch("ocVerifyImage_* failed\n"));
1948 /* build the symbol list for this image */
1949 # if defined(OBJFORMAT_ELF)
1950 r = ocGetNames_ELF ( oc );
1951 # elif defined(OBJFORMAT_PEi386)
1952 r = ocGetNames_PEi386 ( oc );
1953 # elif defined(OBJFORMAT_MACHO)
1954 r = ocGetNames_MachO ( oc );
1956 barf("loadObj: no getNames method");
1959 IF_DEBUG(linker, debugBelch("ocGetNames_* failed\n"));
1963 /* loaded, but not resolved yet */
1964 oc->status = OBJECT_LOADED;
1969 /* -----------------------------------------------------------------------------
1970 * resolve all the currently unlinked objects in memory
1972 * Returns: 1 if ok, 0 on error.
1982 for (oc = objects; oc; oc = oc->next) {
1983 if (oc->status != OBJECT_RESOLVED) {
1984 # if defined(OBJFORMAT_ELF)
1985 r = ocResolve_ELF ( oc );
1986 # elif defined(OBJFORMAT_PEi386)
1987 r = ocResolve_PEi386 ( oc );
1988 # elif defined(OBJFORMAT_MACHO)
1989 r = ocResolve_MachO ( oc );
1991 barf("resolveObjs: not implemented on this platform");
1993 if (!r) { return r; }
1994 oc->status = OBJECT_RESOLVED;
2000 /* -----------------------------------------------------------------------------
2001 * delete an object from the pool
2004 unloadObj( char *path )
2006 ObjectCode *oc, *prev;
2008 ASSERT(symhash != NULL);
2009 ASSERT(objects != NULL);
2014 for (oc = objects; oc; prev = oc, oc = oc->next) {
2015 if (!strcmp(oc->fileName,path)) {
2017 /* Remove all the mappings for the symbols within this
2022 for (i = 0; i < oc->n_symbols; i++) {
2023 if (oc->symbols[i] != NULL) {
2024 removeStrHashTable(symhash, oc->symbols[i], NULL);
2032 prev->next = oc->next;
2035 // We're going to leave this in place, in case there are
2036 // any pointers from the heap into it:
2037 // #ifdef mingw32_HOST_OS
2038 // VirtualFree(oc->image);
2040 // stgFree(oc->image);
2042 stgFree(oc->fileName);
2043 stgFree(oc->symbols);
2044 stgFree(oc->sections);
2050 errorBelch("unloadObj: can't find `%s' to unload", path);
2054 /* -----------------------------------------------------------------------------
2055 * Sanity checking. For each ObjectCode, maintain a list of address ranges
2056 * which may be prodded during relocation, and abort if we try and write
2057 * outside any of these.
2059 static void addProddableBlock ( ObjectCode* oc, void* start, int size )
2062 = stgMallocBytes(sizeof(ProddableBlock), "addProddableBlock");
2063 /* debugBelch("aPB %p %p %d\n", oc, start, size); */
2067 pb->next = oc->proddables;
2068 oc->proddables = pb;
2071 static void checkProddableBlock ( ObjectCode* oc, void* addr )
2074 for (pb = oc->proddables; pb != NULL; pb = pb->next) {
2075 char* s = (char*)(pb->start);
2076 char* e = s + pb->size - 1;
2077 char* a = (char*)addr;
2078 /* Assumes that the biggest fixup involves a 4-byte write. This
2079 probably needs to be changed to 8 (ie, +7) on 64-bit
2081 if (a >= s && (a+3) <= e) return;
2083 barf("checkProddableBlock: invalid fixup in runtime linker");
2086 /* -----------------------------------------------------------------------------
2087 * Section management.
2089 static void addSection ( ObjectCode* oc, SectionKind kind,
2090 void* start, void* end )
2092 Section* s = stgMallocBytes(sizeof(Section), "addSection");
2096 s->next = oc->sections;
2099 debugBelch("addSection: %p-%p (size %d), kind %d\n",
2100 start, ((char*)end)-1, end - start + 1, kind );
2105 /* --------------------------------------------------------------------------
2107 * This is about allocating a small chunk of memory for every symbol in the
2108 * object file. We make sure that the SymboLExtras are always "in range" of
2109 * limited-range PC-relative instructions on various platforms by allocating
2110 * them right next to the object code itself.
2113 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
2116 ocAllocateSymbolExtras
2118 Allocate additional space at the end of the object file image to make room
2119 for jump islands (powerpc, x86_64) and GOT entries (x86_64).
2121 PowerPC relative branch instructions have a 24 bit displacement field.
2122 As PPC code is always 4-byte-aligned, this yields a +-32MB range.
2123 If a particular imported symbol is outside this range, we have to redirect
2124 the jump to a short piece of new code that just loads the 32bit absolute
2125 address and jumps there.
2126 On x86_64, PC-relative jumps and PC-relative accesses to the GOT are limited
2129 This function just allocates space for one SymbolExtra for every
2130 undefined symbol in the object file. The code for the jump islands is
2131 filled in by makeSymbolExtra below.
2134 static int ocAllocateSymbolExtras( ObjectCode* oc, int count, int first )
2141 int misalignment = 0;
2142 #ifdef darwin_HOST_OS
2143 misalignment = oc->misalignment;
2149 // round up to the nearest 4
2150 aligned = (oc->fileSize + 3) & ~3;
2153 pagesize = getpagesize();
2154 n = ROUND_UP( oc->fileSize, pagesize );
2155 m = ROUND_UP( aligned + sizeof (SymbolExtra) * count, pagesize );
2157 /* we try to use spare space at the end of the last page of the
2158 * image for the jump islands, but if there isn't enough space
2159 * then we have to map some (anonymously, remembering MAP_32BIT).
2161 if( m > n ) // we need to allocate more pages
2163 oc->symbol_extras = mmapForLinker(sizeof(SymbolExtra) * count,
2168 oc->symbol_extras = (SymbolExtra *) (oc->image + aligned);
2171 oc->image -= misalignment;
2172 oc->image = stgReallocBytes( oc->image,
2174 aligned + sizeof (SymbolExtra) * count,
2175 "ocAllocateSymbolExtras" );
2176 oc->image += misalignment;
2178 oc->symbol_extras = (SymbolExtra *) (oc->image + aligned);
2179 #endif /* USE_MMAP */
2181 memset( oc->symbol_extras, 0, sizeof (SymbolExtra) * count );
2184 oc->symbol_extras = NULL;
2186 oc->first_symbol_extra = first;
2187 oc->n_symbol_extras = count;
2192 static SymbolExtra* makeSymbolExtra( ObjectCode* oc,
2193 unsigned long symbolNumber,
2194 unsigned long target )
2198 ASSERT( symbolNumber >= oc->first_symbol_extra
2199 && symbolNumber - oc->first_symbol_extra < oc->n_symbol_extras);
2201 extra = &oc->symbol_extras[symbolNumber - oc->first_symbol_extra];
2203 #ifdef powerpc_HOST_ARCH
2204 // lis r12, hi16(target)
2205 extra->jumpIsland.lis_r12 = 0x3d80;
2206 extra->jumpIsland.hi_addr = target >> 16;
2208 // ori r12, r12, lo16(target)
2209 extra->jumpIsland.ori_r12_r12 = 0x618c;
2210 extra->jumpIsland.lo_addr = target & 0xffff;
2213 extra->jumpIsland.mtctr_r12 = 0x7d8903a6;
2216 extra->jumpIsland.bctr = 0x4e800420;
2218 #ifdef x86_64_HOST_ARCH
2220 static uint8_t jmp[] = { 0xFF, 0x25, 0xF2, 0xFF, 0xFF, 0xFF };
2221 extra->addr = target;
2222 memcpy(extra->jumpIsland, jmp, 6);
2230 /* --------------------------------------------------------------------------
2231 * PowerPC specifics (instruction cache flushing)
2232 * ------------------------------------------------------------------------*/
2234 #ifdef powerpc_HOST_ARCH
2236 ocFlushInstructionCache
2238 Flush the data & instruction caches.
2239 Because the PPC has split data/instruction caches, we have to
2240 do that whenever we modify code at runtime.
2243 static void ocFlushInstructionCache( ObjectCode *oc )
2245 int n = (oc->fileSize + sizeof( SymbolExtra ) * oc->n_symbol_extras + 3) / 4;
2246 unsigned long *p = (unsigned long *) oc->image;
2250 __asm__ volatile ( "dcbf 0,%0\n\t"
2258 __asm__ volatile ( "sync\n\t"
2264 /* --------------------------------------------------------------------------
2265 * PEi386 specifics (Win32 targets)
2266 * ------------------------------------------------------------------------*/
2268 /* The information for this linker comes from
2269 Microsoft Portable Executable
2270 and Common Object File Format Specification
2271 revision 5.1 January 1998
2272 which SimonM says comes from the MS Developer Network CDs.
2274 It can be found there (on older CDs), but can also be found
2277 http://www.microsoft.com/hwdev/hardware/PECOFF.asp
2279 (this is Rev 6.0 from February 1999).
2281 Things move, so if that fails, try searching for it via
2283 http://www.google.com/search?q=PE+COFF+specification
2285 The ultimate reference for the PE format is the Winnt.h
2286 header file that comes with the Platform SDKs; as always,
2287 implementations will drift wrt their documentation.
2289 A good background article on the PE format is Matt Pietrek's
2290 March 1994 article in Microsoft System Journal (MSJ)
2291 (Vol.9, No. 3): "Peering Inside the PE: A Tour of the
2292 Win32 Portable Executable File Format." The info in there
2293 has recently been updated in a two part article in
2294 MSDN magazine, issues Feb and March 2002,
2295 "Inside Windows: An In-Depth Look into the Win32 Portable
2296 Executable File Format"
2298 John Levine's book "Linkers and Loaders" contains useful
2303 #if defined(OBJFORMAT_PEi386)
2307 typedef unsigned char UChar;
2308 typedef unsigned short UInt16;
2309 typedef unsigned int UInt32;
2316 UInt16 NumberOfSections;
2317 UInt32 TimeDateStamp;
2318 UInt32 PointerToSymbolTable;
2319 UInt32 NumberOfSymbols;
2320 UInt16 SizeOfOptionalHeader;
2321 UInt16 Characteristics;
2325 #define sizeof_COFF_header 20
2332 UInt32 VirtualAddress;
2333 UInt32 SizeOfRawData;
2334 UInt32 PointerToRawData;
2335 UInt32 PointerToRelocations;
2336 UInt32 PointerToLinenumbers;
2337 UInt16 NumberOfRelocations;
2338 UInt16 NumberOfLineNumbers;
2339 UInt32 Characteristics;
2343 #define sizeof_COFF_section 40
2350 UInt16 SectionNumber;
2353 UChar NumberOfAuxSymbols;
2357 #define sizeof_COFF_symbol 18
2362 UInt32 VirtualAddress;
2363 UInt32 SymbolTableIndex;
2368 #define sizeof_COFF_reloc 10
2371 /* From PE spec doc, section 3.3.2 */
2372 /* Note use of MYIMAGE_* since IMAGE_* are already defined in
2373 windows.h -- for the same purpose, but I want to know what I'm
2375 #define MYIMAGE_FILE_RELOCS_STRIPPED 0x0001
2376 #define MYIMAGE_FILE_EXECUTABLE_IMAGE 0x0002
2377 #define MYIMAGE_FILE_DLL 0x2000
2378 #define MYIMAGE_FILE_SYSTEM 0x1000
2379 #define MYIMAGE_FILE_BYTES_REVERSED_HI 0x8000
2380 #define MYIMAGE_FILE_BYTES_REVERSED_LO 0x0080
2381 #define MYIMAGE_FILE_32BIT_MACHINE 0x0100
2383 /* From PE spec doc, section 5.4.2 and 5.4.4 */
2384 #define MYIMAGE_SYM_CLASS_EXTERNAL 2
2385 #define MYIMAGE_SYM_CLASS_STATIC 3
2386 #define MYIMAGE_SYM_UNDEFINED 0
2388 /* From PE spec doc, section 4.1 */
2389 #define MYIMAGE_SCN_CNT_CODE 0x00000020
2390 #define MYIMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040
2391 #define MYIMAGE_SCN_LNK_NRELOC_OVFL 0x01000000
2393 /* From PE spec doc, section 5.2.1 */
2394 #define MYIMAGE_REL_I386_DIR32 0x0006
2395 #define MYIMAGE_REL_I386_REL32 0x0014
2398 /* We use myindex to calculate array addresses, rather than
2399 simply doing the normal subscript thing. That's because
2400 some of the above structs have sizes which are not
2401 a whole number of words. GCC rounds their sizes up to a
2402 whole number of words, which means that the address calcs
2403 arising from using normal C indexing or pointer arithmetic
2404 are just plain wrong. Sigh.
2407 myindex ( int scale, void* base, int index )
2410 ((UChar*)base) + scale * index;
2415 printName ( UChar* name, UChar* strtab )
2417 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
2418 UInt32 strtab_offset = * (UInt32*)(name+4);
2419 debugBelch("%s", strtab + strtab_offset );
2422 for (i = 0; i < 8; i++) {
2423 if (name[i] == 0) break;
2424 debugBelch("%c", name[i] );
2431 copyName ( UChar* name, UChar* strtab, UChar* dst, int dstSize )
2433 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
2434 UInt32 strtab_offset = * (UInt32*)(name+4);
2435 strncpy ( (char*)dst, (char*)strtab+strtab_offset, dstSize );
2441 if (name[i] == 0) break;
2451 cstring_from_COFF_symbol_name ( UChar* name, UChar* strtab )
2454 /* If the string is longer than 8 bytes, look in the
2455 string table for it -- this will be correctly zero terminated.
2457 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
2458 UInt32 strtab_offset = * (UInt32*)(name+4);
2459 return ((UChar*)strtab) + strtab_offset;
2461 /* Otherwise, if shorter than 8 bytes, return the original,
2462 which by defn is correctly terminated.
2464 if (name[7]==0) return name;
2465 /* The annoying case: 8 bytes. Copy into a temporary
2466 (XXX which is never freed ...)
2468 newstr = stgMallocBytes(9, "cstring_from_COFF_symbol_name");
2470 strncpy((char*)newstr,(char*)name,8);
2475 /* Getting the name of a section is mildly tricky, so we make a
2476 function for it. Sadly, in one case we have to copy the string
2477 (when it is exactly 8 bytes long there's no trailing '\0'), so for
2478 consistency we *always* copy the string; the caller must free it
2481 cstring_from_section_name (UChar* name, UChar* strtab)
2486 int strtab_offset = strtol((char*)name+1,NULL,10);
2487 int len = strlen(((char*)strtab) + strtab_offset);
2489 newstr = stgMallocBytes(len, "cstring_from_section_symbol_name");
2490 strcpy((char*)newstr, (char*)((UChar*)strtab) + strtab_offset);
2495 newstr = stgMallocBytes(9, "cstring_from_section_symbol_name");
2497 strncpy((char*)newstr,(char*)name,8);
2503 /* Just compares the short names (first 8 chars) */
2504 static COFF_section *
2505 findPEi386SectionCalled ( ObjectCode* oc, UChar* name )
2509 = (COFF_header*)(oc->image);
2510 COFF_section* sectab
2512 ((UChar*)(oc->image))
2513 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2515 for (i = 0; i < hdr->NumberOfSections; i++) {
2518 COFF_section* section_i
2520 myindex ( sizeof_COFF_section, sectab, i );
2521 n1 = (UChar*) &(section_i->Name);
2523 if (n1[0]==n2[0] && n1[1]==n2[1] && n1[2]==n2[2] &&
2524 n1[3]==n2[3] && n1[4]==n2[4] && n1[5]==n2[5] &&
2525 n1[6]==n2[6] && n1[7]==n2[7])
2534 zapTrailingAtSign ( UChar* sym )
2536 # define my_isdigit(c) ((c) >= '0' && (c) <= '9')
2538 if (sym[0] == 0) return;
2540 while (sym[i] != 0) i++;
2543 while (j > 0 && my_isdigit(sym[j])) j--;
2544 if (j > 0 && sym[j] == '@' && j != i) sym[j] = 0;
2549 lookupSymbolInDLLs ( UChar *lbl )
2554 for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next) {
2555 /* debugBelch("look in %s for %s\n", o_dll->name, lbl); */
2557 if (lbl[0] == '_') {
2558 /* HACK: if the name has an initial underscore, try stripping
2559 it off & look that up first. I've yet to verify whether there's
2560 a Rule that governs whether an initial '_' *should always* be
2561 stripped off when mapping from import lib name to the DLL name.
2563 sym = GetProcAddress(o_dll->instance, (char*)(lbl+1));
2565 /*debugBelch("found %s in %s\n", lbl+1,o_dll->name);*/
2569 sym = GetProcAddress(o_dll->instance, (char*)lbl);
2571 /*debugBelch("found %s in %s\n", lbl,o_dll->name);*/
2580 ocVerifyImage_PEi386 ( ObjectCode* oc )
2585 COFF_section* sectab;
2586 COFF_symbol* symtab;
2588 /* debugBelch("\nLOADING %s\n", oc->fileName); */
2589 hdr = (COFF_header*)(oc->image);
2590 sectab = (COFF_section*) (
2591 ((UChar*)(oc->image))
2592 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2594 symtab = (COFF_symbol*) (
2595 ((UChar*)(oc->image))
2596 + hdr->PointerToSymbolTable
2598 strtab = ((UChar*)symtab)
2599 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2601 if (hdr->Machine != 0x14c) {
2602 errorBelch("%s: Not x86 PEi386", oc->fileName);
2605 if (hdr->SizeOfOptionalHeader != 0) {
2606 errorBelch("%s: PEi386 with nonempty optional header", oc->fileName);
2609 if ( /* (hdr->Characteristics & MYIMAGE_FILE_RELOCS_STRIPPED) || */
2610 (hdr->Characteristics & MYIMAGE_FILE_EXECUTABLE_IMAGE) ||
2611 (hdr->Characteristics & MYIMAGE_FILE_DLL) ||
2612 (hdr->Characteristics & MYIMAGE_FILE_SYSTEM) ) {
2613 errorBelch("%s: Not a PEi386 object file", oc->fileName);
2616 if ( (hdr->Characteristics & MYIMAGE_FILE_BYTES_REVERSED_HI)
2617 /* || !(hdr->Characteristics & MYIMAGE_FILE_32BIT_MACHINE) */ ) {
2618 errorBelch("%s: Invalid PEi386 word size or endiannness: %d",
2620 (int)(hdr->Characteristics));
2623 /* If the string table size is way crazy, this might indicate that
2624 there are more than 64k relocations, despite claims to the
2625 contrary. Hence this test. */
2626 /* debugBelch("strtab size %d\n", * (UInt32*)strtab); */
2628 if ( (*(UInt32*)strtab) > 600000 ) {
2629 /* Note that 600k has no special significance other than being
2630 big enough to handle the almost-2MB-sized lumps that
2631 constitute HSwin32*.o. */
2632 debugBelch("PEi386 object has suspiciously large string table; > 64k relocs?");
2637 /* No further verification after this point; only debug printing. */
2639 IF_DEBUG(linker, i=1);
2640 if (i == 0) return 1;
2642 debugBelch( "sectab offset = %d\n", ((UChar*)sectab) - ((UChar*)hdr) );
2643 debugBelch( "symtab offset = %d\n", ((UChar*)symtab) - ((UChar*)hdr) );
2644 debugBelch( "strtab offset = %d\n", ((UChar*)strtab) - ((UChar*)hdr) );
2647 debugBelch( "Machine: 0x%x\n", (UInt32)(hdr->Machine) );
2648 debugBelch( "# sections: %d\n", (UInt32)(hdr->NumberOfSections) );
2649 debugBelch( "time/date: 0x%x\n", (UInt32)(hdr->TimeDateStamp) );
2650 debugBelch( "symtab offset: %d\n", (UInt32)(hdr->PointerToSymbolTable) );
2651 debugBelch( "# symbols: %d\n", (UInt32)(hdr->NumberOfSymbols) );
2652 debugBelch( "sz of opt hdr: %d\n", (UInt32)(hdr->SizeOfOptionalHeader) );
2653 debugBelch( "characteristics: 0x%x\n", (UInt32)(hdr->Characteristics) );
2655 /* Print the section table. */
2657 for (i = 0; i < hdr->NumberOfSections; i++) {
2659 COFF_section* sectab_i
2661 myindex ( sizeof_COFF_section, sectab, i );
2668 printName ( sectab_i->Name, strtab );
2678 sectab_i->VirtualSize,
2679 sectab_i->VirtualAddress,
2680 sectab_i->SizeOfRawData,
2681 sectab_i->PointerToRawData,
2682 sectab_i->NumberOfRelocations,
2683 sectab_i->PointerToRelocations,
2684 sectab_i->PointerToRawData
2686 reltab = (COFF_reloc*) (
2687 ((UChar*)(oc->image)) + sectab_i->PointerToRelocations
2690 if ( sectab_i->Characteristics & MYIMAGE_SCN_LNK_NRELOC_OVFL ) {
2691 /* If the relocation field (a short) has overflowed, the
2692 * real count can be found in the first reloc entry.
2694 * See Section 4.1 (last para) of the PE spec (rev6.0).
2696 COFF_reloc* rel = (COFF_reloc*)
2697 myindex ( sizeof_COFF_reloc, reltab, 0 );
2698 noRelocs = rel->VirtualAddress;
2701 noRelocs = sectab_i->NumberOfRelocations;
2705 for (; j < noRelocs; j++) {
2707 COFF_reloc* rel = (COFF_reloc*)
2708 myindex ( sizeof_COFF_reloc, reltab, j );
2710 " type 0x%-4x vaddr 0x%-8x name `",
2712 rel->VirtualAddress );
2713 sym = (COFF_symbol*)
2714 myindex ( sizeof_COFF_symbol, symtab, rel->SymbolTableIndex );
2715 /* Hmm..mysterious looking offset - what's it for? SOF */
2716 printName ( sym->Name, strtab -10 );
2723 debugBelch("string table has size 0x%x\n", * (UInt32*)strtab );
2724 debugBelch("---START of string table---\n");
2725 for (i = 4; i < *(Int32*)strtab; i++) {
2727 debugBelch("\n"); else
2728 debugBelch("%c", strtab[i] );
2730 debugBelch("--- END of string table---\n");
2735 COFF_symbol* symtab_i;
2736 if (i >= (Int32)(hdr->NumberOfSymbols)) break;
2737 symtab_i = (COFF_symbol*)
2738 myindex ( sizeof_COFF_symbol, symtab, i );
2744 printName ( symtab_i->Name, strtab );
2753 (Int32)(symtab_i->SectionNumber),
2754 (UInt32)symtab_i->Type,
2755 (UInt32)symtab_i->StorageClass,
2756 (UInt32)symtab_i->NumberOfAuxSymbols
2758 i += symtab_i->NumberOfAuxSymbols;
2768 ocGetNames_PEi386 ( ObjectCode* oc )
2771 COFF_section* sectab;
2772 COFF_symbol* symtab;
2779 hdr = (COFF_header*)(oc->image);
2780 sectab = (COFF_section*) (
2781 ((UChar*)(oc->image))
2782 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2784 symtab = (COFF_symbol*) (
2785 ((UChar*)(oc->image))
2786 + hdr->PointerToSymbolTable
2788 strtab = ((UChar*)(oc->image))
2789 + hdr->PointerToSymbolTable
2790 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2792 /* Allocate space for any (local, anonymous) .bss sections. */
2794 for (i = 0; i < hdr->NumberOfSections; i++) {
2797 COFF_section* sectab_i
2799 myindex ( sizeof_COFF_section, sectab, i );
2801 char *secname = cstring_from_section_name(sectab_i->Name, strtab);
2803 if (0 != strcmp(secname, ".bss")) {
2810 /* sof 10/05: the PE spec text isn't too clear regarding what
2811 * the SizeOfRawData field is supposed to hold for object
2812 * file sections containing just uninitialized data -- for executables,
2813 * it is supposed to be zero; unclear what it's supposed to be
2814 * for object files. However, VirtualSize is guaranteed to be
2815 * zero for object files, which definitely suggests that SizeOfRawData
2816 * will be non-zero (where else would the size of this .bss section be
2817 * stored?) Looking at the COFF_section info for incoming object files,
2818 * this certainly appears to be the case.
2820 * => I suspect we've been incorrectly handling .bss sections in (relocatable)
2821 * object files up until now. This turned out to bite us with ghc-6.4.1's use
2822 * of gcc-3.4.x, which has started to emit initially-zeroed-out local 'static'
2823 * variable decls into to the .bss section. (The specific function in Q which
2824 * triggered this is libraries/base/cbits/dirUtils.c:__hscore_getFolderPath())
2826 if (sectab_i->VirtualSize == 0 && sectab_i->SizeOfRawData == 0) continue;
2827 /* This is a non-empty .bss section. Allocate zeroed space for
2828 it, and set its PointerToRawData field such that oc->image +
2829 PointerToRawData == addr_of_zeroed_space. */
2830 bss_sz = sectab_i->VirtualSize;
2831 if ( bss_sz < sectab_i->SizeOfRawData) { bss_sz = sectab_i->SizeOfRawData; }
2832 zspace = stgCallocBytes(1, bss_sz, "ocGetNames_PEi386(anonymous bss)");
2833 sectab_i->PointerToRawData = ((UChar*)zspace) - ((UChar*)(oc->image));
2834 addProddableBlock(oc, zspace, bss_sz);
2835 /* debugBelch("BSS anon section at 0x%x\n", zspace); */
2838 /* Copy section information into the ObjectCode. */
2840 for (i = 0; i < hdr->NumberOfSections; i++) {
2846 = SECTIONKIND_OTHER;
2847 COFF_section* sectab_i
2849 myindex ( sizeof_COFF_section, sectab, i );
2851 char *secname = cstring_from_section_name(sectab_i->Name, strtab);
2853 IF_DEBUG(linker, debugBelch("section name = %s\n", secname ));
2856 /* I'm sure this is the Right Way to do it. However, the
2857 alternative of testing the sectab_i->Name field seems to
2858 work ok with Cygwin.
2860 if (sectab_i->Characteristics & MYIMAGE_SCN_CNT_CODE ||
2861 sectab_i->Characteristics & MYIMAGE_SCN_CNT_INITIALIZED_DATA)
2862 kind = SECTIONKIND_CODE_OR_RODATA;
2865 if (0==strcmp(".text",(char*)secname) ||
2866 0==strcmp(".rdata",(char*)secname)||
2867 0==strcmp(".rodata",(char*)secname))
2868 kind = SECTIONKIND_CODE_OR_RODATA;
2869 if (0==strcmp(".data",(char*)secname) ||
2870 0==strcmp(".bss",(char*)secname))
2871 kind = SECTIONKIND_RWDATA;
2873 ASSERT(sectab_i->SizeOfRawData == 0 || sectab_i->VirtualSize == 0);
2874 sz = sectab_i->SizeOfRawData;
2875 if (sz < sectab_i->VirtualSize) sz = sectab_i->VirtualSize;
2877 start = ((UChar*)(oc->image)) + sectab_i->PointerToRawData;
2878 end = start + sz - 1;
2880 if (kind == SECTIONKIND_OTHER
2881 /* Ignore sections called which contain stabs debugging
2883 && 0 != strcmp(".stab", (char*)secname)
2884 && 0 != strcmp(".stabstr", (char*)secname)
2885 /* ignore constructor section for now */
2886 && 0 != strcmp(".ctors", (char*)secname)
2887 /* ignore section generated from .ident */
2888 && 0!= strncmp(".debug", (char*)secname, 6)
2889 /* ignore unknown section that appeared in gcc 3.4.5(?) */
2890 && 0!= strcmp(".reloc", (char*)secname)
2891 && 0 != strcmp(".rdata$zzz", (char*)secname)
2893 errorBelch("Unknown PEi386 section name `%s' (while processing: %s)", secname, oc->fileName);
2898 if (kind != SECTIONKIND_OTHER && end >= start) {
2899 addSection(oc, kind, start, end);
2900 addProddableBlock(oc, start, end - start + 1);
2906 /* Copy exported symbols into the ObjectCode. */
2908 oc->n_symbols = hdr->NumberOfSymbols;
2909 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
2910 "ocGetNames_PEi386(oc->symbols)");
2911 /* Call me paranoid; I don't care. */
2912 for (i = 0; i < oc->n_symbols; i++)
2913 oc->symbols[i] = NULL;
2917 COFF_symbol* symtab_i;
2918 if (i >= (Int32)(hdr->NumberOfSymbols)) break;
2919 symtab_i = (COFF_symbol*)
2920 myindex ( sizeof_COFF_symbol, symtab, i );
2924 if (symtab_i->StorageClass == MYIMAGE_SYM_CLASS_EXTERNAL
2925 && symtab_i->SectionNumber != MYIMAGE_SYM_UNDEFINED) {
2926 /* This symbol is global and defined, viz, exported */
2927 /* for MYIMAGE_SYMCLASS_EXTERNAL
2928 && !MYIMAGE_SYM_UNDEFINED,
2929 the address of the symbol is:
2930 address of relevant section + offset in section
2932 COFF_section* sectabent
2933 = (COFF_section*) myindex ( sizeof_COFF_section,
2935 symtab_i->SectionNumber-1 );
2936 addr = ((UChar*)(oc->image))
2937 + (sectabent->PointerToRawData
2941 if (symtab_i->SectionNumber == MYIMAGE_SYM_UNDEFINED
2942 && symtab_i->Value > 0) {
2943 /* This symbol isn't in any section at all, ie, global bss.
2944 Allocate zeroed space for it. */
2945 addr = stgCallocBytes(1, symtab_i->Value,
2946 "ocGetNames_PEi386(non-anonymous bss)");
2947 addSection(oc, SECTIONKIND_RWDATA, addr,
2948 ((UChar*)addr) + symtab_i->Value - 1);
2949 addProddableBlock(oc, addr, symtab_i->Value);
2950 /* debugBelch("BSS section at 0x%x\n", addr); */
2953 if (addr != NULL ) {
2954 sname = cstring_from_COFF_symbol_name ( symtab_i->Name, strtab );
2955 /* debugBelch("addSymbol %p `%s \n", addr,sname); */
2956 IF_DEBUG(linker, debugBelch("addSymbol %p `%s'\n", addr,sname);)
2957 ASSERT(i >= 0 && i < oc->n_symbols);
2958 /* cstring_from_COFF_symbol_name always succeeds. */
2959 oc->symbols[i] = (char*)sname;
2960 ghciInsertStrHashTable(oc->fileName, symhash, (char*)sname, addr);
2964 "IGNORING symbol %d\n"
2968 printName ( symtab_i->Name, strtab );
2977 (Int32)(symtab_i->SectionNumber),
2978 (UInt32)symtab_i->Type,
2979 (UInt32)symtab_i->StorageClass,
2980 (UInt32)symtab_i->NumberOfAuxSymbols
2985 i += symtab_i->NumberOfAuxSymbols;
2994 ocResolve_PEi386 ( ObjectCode* oc )
2997 COFF_section* sectab;
2998 COFF_symbol* symtab;
3008 /* ToDo: should be variable-sized? But is at least safe in the
3009 sense of buffer-overrun-proof. */
3011 /* debugBelch("resolving for %s\n", oc->fileName); */
3013 hdr = (COFF_header*)(oc->image);
3014 sectab = (COFF_section*) (
3015 ((UChar*)(oc->image))
3016 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
3018 symtab = (COFF_symbol*) (
3019 ((UChar*)(oc->image))
3020 + hdr->PointerToSymbolTable
3022 strtab = ((UChar*)(oc->image))
3023 + hdr->PointerToSymbolTable
3024 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
3026 for (i = 0; i < hdr->NumberOfSections; i++) {
3027 COFF_section* sectab_i
3029 myindex ( sizeof_COFF_section, sectab, i );
3032 ((UChar*)(oc->image)) + sectab_i->PointerToRelocations
3035 char *secname = cstring_from_section_name(sectab_i->Name, strtab);
3037 /* Ignore sections called which contain stabs debugging
3039 if (0 == strcmp(".stab", (char*)secname)
3040 || 0 == strcmp(".stabstr", (char*)secname)
3041 || 0 == strcmp(".ctors", (char*)secname)
3042 || 0 == strncmp(".debug", (char*)secname, 6)
3043 || 0 == strcmp(".rdata$zzz", (char*)secname)) {
3050 if ( sectab_i->Characteristics & MYIMAGE_SCN_LNK_NRELOC_OVFL ) {
3051 /* If the relocation field (a short) has overflowed, the
3052 * real count can be found in the first reloc entry.
3054 * See Section 4.1 (last para) of the PE spec (rev6.0).
3056 * Nov2003 update: the GNU linker still doesn't correctly
3057 * handle the generation of relocatable object files with
3058 * overflown relocations. Hence the output to warn of potential
3061 COFF_reloc* rel = (COFF_reloc*)
3062 myindex ( sizeof_COFF_reloc, reltab, 0 );
3063 noRelocs = rel->VirtualAddress;
3065 /* 10/05: we now assume (and check for) a GNU ld that is capable
3066 * of handling object files with (>2^16) of relocs.
3069 debugBelch("WARNING: Overflown relocation field (# relocs found: %u)\n",
3074 noRelocs = sectab_i->NumberOfRelocations;
3079 for (; j < noRelocs; j++) {
3081 COFF_reloc* reltab_j
3083 myindex ( sizeof_COFF_reloc, reltab, j );
3085 /* the location to patch */
3087 ((UChar*)(oc->image))
3088 + (sectab_i->PointerToRawData
3089 + reltab_j->VirtualAddress
3090 - sectab_i->VirtualAddress )
3092 /* the existing contents of pP */
3094 /* the symbol to connect to */
3095 sym = (COFF_symbol*)
3096 myindex ( sizeof_COFF_symbol,
3097 symtab, reltab_j->SymbolTableIndex );
3100 "reloc sec %2d num %3d: type 0x%-4x "
3101 "vaddr 0x%-8x name `",
3103 (UInt32)reltab_j->Type,
3104 reltab_j->VirtualAddress );
3105 printName ( sym->Name, strtab );
3106 debugBelch("'\n" ));
3108 if (sym->StorageClass == MYIMAGE_SYM_CLASS_STATIC) {
3109 COFF_section* section_sym
3110 = findPEi386SectionCalled ( oc, sym->Name );
3112 errorBelch("%s: can't find section `%s'", oc->fileName, sym->Name);
3115 S = ((UInt32)(oc->image))
3116 + (section_sym->PointerToRawData
3119 copyName ( sym->Name, strtab, symbol, 1000-1 );
3120 S = (UInt32) lookupSymbol( (char*)symbol );
3121 if ((void*)S != NULL) goto foundit;
3122 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3126 checkProddableBlock(oc, pP);
3127 switch (reltab_j->Type) {
3128 case MYIMAGE_REL_I386_DIR32:
3131 case MYIMAGE_REL_I386_REL32:
3132 /* Tricky. We have to insert a displacement at
3133 pP which, when added to the PC for the _next_
3134 insn, gives the address of the target (S).
3135 Problem is to know the address of the next insn
3136 when we only know pP. We assume that this
3137 literal field is always the last in the insn,
3138 so that the address of the next insn is pP+4
3139 -- hence the constant 4.
3140 Also I don't know if A should be added, but so
3141 far it has always been zero.
3143 SOF 05/2005: 'A' (old contents of *pP) have been observed
3144 to contain values other than zero (the 'wx' object file
3145 that came with wxhaskell-0.9.4; dunno how it was compiled..).
3146 So, add displacement to old value instead of asserting
3147 A to be zero. Fixes wxhaskell-related crashes, and no other
3148 ill effects have been observed.
3150 Update: the reason why we're seeing these more elaborate
3151 relocations is due to a switch in how the NCG compiles SRTs
3152 and offsets to them from info tables. SRTs live in .(ro)data,
3153 while info tables live in .text, causing GAS to emit REL32/DISP32
3154 relocations with non-zero values. Adding the displacement is
3155 the right thing to do.
3157 *pP = S - ((UInt32)pP) - 4 + A;
3160 debugBelch("%s: unhandled PEi386 relocation type %d",
3161 oc->fileName, reltab_j->Type);
3168 IF_DEBUG(linker, debugBelch("completed %s", oc->fileName));
3172 #endif /* defined(OBJFORMAT_PEi386) */
3175 /* --------------------------------------------------------------------------
3177 * ------------------------------------------------------------------------*/
3179 #if defined(OBJFORMAT_ELF)
3184 #if defined(sparc_HOST_ARCH)
3185 # define ELF_TARGET_SPARC /* Used inside <elf.h> */
3186 #elif defined(i386_HOST_ARCH)
3187 # define ELF_TARGET_386 /* Used inside <elf.h> */
3188 #elif defined(x86_64_HOST_ARCH)
3189 # define ELF_TARGET_X64_64
3193 #if !defined(openbsd_HOST_OS)
3196 /* openbsd elf has things in different places, with diff names */
3197 # include <elf_abi.h>
3198 # include <machine/reloc.h>
3199 # define R_386_32 RELOC_32
3200 # define R_386_PC32 RELOC_PC32
3203 /* If elf.h doesn't define it */
3204 # ifndef R_X86_64_PC64
3205 # define R_X86_64_PC64 24
3209 * Define a set of types which can be used for both ELF32 and ELF64
3213 #define ELFCLASS ELFCLASS64
3214 #define Elf_Addr Elf64_Addr
3215 #define Elf_Word Elf64_Word
3216 #define Elf_Sword Elf64_Sword
3217 #define Elf_Ehdr Elf64_Ehdr
3218 #define Elf_Phdr Elf64_Phdr
3219 #define Elf_Shdr Elf64_Shdr
3220 #define Elf_Sym Elf64_Sym
3221 #define Elf_Rel Elf64_Rel
3222 #define Elf_Rela Elf64_Rela
3224 #define ELF_ST_TYPE ELF64_ST_TYPE
3227 #define ELF_ST_BIND ELF64_ST_BIND
3230 #define ELF_R_TYPE ELF64_R_TYPE
3233 #define ELF_R_SYM ELF64_R_SYM
3236 #define ELFCLASS ELFCLASS32
3237 #define Elf_Addr Elf32_Addr
3238 #define Elf_Word Elf32_Word
3239 #define Elf_Sword Elf32_Sword
3240 #define Elf_Ehdr Elf32_Ehdr
3241 #define Elf_Phdr Elf32_Phdr
3242 #define Elf_Shdr Elf32_Shdr
3243 #define Elf_Sym Elf32_Sym
3244 #define Elf_Rel Elf32_Rel
3245 #define Elf_Rela Elf32_Rela
3247 #define ELF_ST_TYPE ELF32_ST_TYPE
3250 #define ELF_ST_BIND ELF32_ST_BIND
3253 #define ELF_R_TYPE ELF32_R_TYPE
3256 #define ELF_R_SYM ELF32_R_SYM
3262 * Functions to allocate entries in dynamic sections. Currently we simply
3263 * preallocate a large number, and we don't check if a entry for the given
3264 * target already exists (a linear search is too slow). Ideally these
3265 * entries would be associated with symbols.
3268 /* These sizes sufficient to load HSbase + HShaskell98 + a few modules */
3269 #define GOT_SIZE 0x20000
3270 #define FUNCTION_TABLE_SIZE 0x10000
3271 #define PLT_SIZE 0x08000
3274 static Elf_Addr got[GOT_SIZE];
3275 static unsigned int gotIndex;
3276 static Elf_Addr gp_val = (Elf_Addr)got;
3279 allocateGOTEntry(Elf_Addr target)
3283 if (gotIndex >= GOT_SIZE)
3284 barf("Global offset table overflow");
3286 entry = &got[gotIndex++];
3288 return (Elf_Addr)entry;
3292 #ifdef ELF_FUNCTION_DESC
3298 static FunctionDesc functionTable[FUNCTION_TABLE_SIZE];
3299 static unsigned int functionTableIndex;
3302 allocateFunctionDesc(Elf_Addr target)
3304 FunctionDesc *entry;
3306 if (functionTableIndex >= FUNCTION_TABLE_SIZE)
3307 barf("Function table overflow");
3309 entry = &functionTable[functionTableIndex++];
3311 entry->gp = (Elf_Addr)gp_val;
3312 return (Elf_Addr)entry;
3316 copyFunctionDesc(Elf_Addr target)
3318 FunctionDesc *olddesc = (FunctionDesc *)target;
3319 FunctionDesc *newdesc;
3321 newdesc = (FunctionDesc *)allocateFunctionDesc(olddesc->ip);
3322 newdesc->gp = olddesc->gp;
3323 return (Elf_Addr)newdesc;
3330 unsigned char code[sizeof(plt_code)];
3334 allocatePLTEntry(Elf_Addr target, ObjectCode *oc)
3336 PLTEntry *plt = (PLTEntry *)oc->plt;
3339 if (oc->pltIndex >= PLT_SIZE)
3340 barf("Procedure table overflow");
3342 entry = &plt[oc->pltIndex++];
3343 memcpy(entry->code, plt_code, sizeof(entry->code));
3344 PLT_RELOC(entry->code, target);
3345 return (Elf_Addr)entry;
3351 return (PLT_SIZE * sizeof(PLTEntry));
3357 * Generic ELF functions
3361 findElfSection ( void* objImage, Elf_Word sh_type )
3363 char* ehdrC = (char*)objImage;
3364 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3365 Elf_Shdr* shdr = (Elf_Shdr*)(ehdrC + ehdr->e_shoff);
3366 char* sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
3370 for (i = 0; i < ehdr->e_shnum; i++) {
3371 if (shdr[i].sh_type == sh_type
3372 /* Ignore the section header's string table. */
3373 && i != ehdr->e_shstrndx
3374 /* Ignore string tables named .stabstr, as they contain
3376 && 0 != memcmp(".stabstr", sh_strtab + shdr[i].sh_name, 8)
3378 ptr = ehdrC + shdr[i].sh_offset;
3386 ocVerifyImage_ELF ( ObjectCode* oc )
3390 int i, j, nent, nstrtab, nsymtabs;
3394 char* ehdrC = (char*)(oc->image);
3395 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3397 if (ehdr->e_ident[EI_MAG0] != ELFMAG0 ||
3398 ehdr->e_ident[EI_MAG1] != ELFMAG1 ||
3399 ehdr->e_ident[EI_MAG2] != ELFMAG2 ||
3400 ehdr->e_ident[EI_MAG3] != ELFMAG3) {
3401 errorBelch("%s: not an ELF object", oc->fileName);
3405 if (ehdr->e_ident[EI_CLASS] != ELFCLASS) {
3406 errorBelch("%s: unsupported ELF format", oc->fileName);
3410 if (ehdr->e_ident[EI_DATA] == ELFDATA2LSB) {
3411 IF_DEBUG(linker,debugBelch( "Is little-endian\n" ));
3413 if (ehdr->e_ident[EI_DATA] == ELFDATA2MSB) {
3414 IF_DEBUG(linker,debugBelch( "Is big-endian\n" ));
3416 errorBelch("%s: unknown endiannness", oc->fileName);
3420 if (ehdr->e_type != ET_REL) {
3421 errorBelch("%s: not a relocatable object (.o) file", oc->fileName);
3424 IF_DEBUG(linker, debugBelch( "Is a relocatable object (.o) file\n" ));
3426 IF_DEBUG(linker,debugBelch( "Architecture is " ));
3427 switch (ehdr->e_machine) {
3428 case EM_386: IF_DEBUG(linker,debugBelch( "x86" )); break;
3429 #ifdef EM_SPARC32PLUS
3430 case EM_SPARC32PLUS:
3432 case EM_SPARC: IF_DEBUG(linker,debugBelch( "sparc" )); break;
3434 case EM_IA_64: IF_DEBUG(linker,debugBelch( "ia64" )); break;
3436 case EM_PPC: IF_DEBUG(linker,debugBelch( "powerpc32" )); break;
3438 case EM_X86_64: IF_DEBUG(linker,debugBelch( "x86_64" )); break;
3439 #elif defined(EM_AMD64)
3440 case EM_AMD64: IF_DEBUG(linker,debugBelch( "amd64" )); break;
3442 default: IF_DEBUG(linker,debugBelch( "unknown" ));
3443 errorBelch("%s: unknown architecture (e_machine == %d)"
3444 , oc->fileName, ehdr->e_machine);
3448 IF_DEBUG(linker,debugBelch(
3449 "\nSection header table: start %ld, n_entries %d, ent_size %d\n",
3450 (long)ehdr->e_shoff, ehdr->e_shnum, ehdr->e_shentsize ));
3452 ASSERT (ehdr->e_shentsize == sizeof(Elf_Shdr));
3454 shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
3456 if (ehdr->e_shstrndx == SHN_UNDEF) {
3457 errorBelch("%s: no section header string table", oc->fileName);
3460 IF_DEBUG(linker,debugBelch( "Section header string table is section %d\n",
3462 sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
3465 for (i = 0; i < ehdr->e_shnum; i++) {
3466 IF_DEBUG(linker,debugBelch("%2d: ", i ));
3467 IF_DEBUG(linker,debugBelch("type=%2d ", (int)shdr[i].sh_type ));
3468 IF_DEBUG(linker,debugBelch("size=%4d ", (int)shdr[i].sh_size ));
3469 IF_DEBUG(linker,debugBelch("offs=%4d ", (int)shdr[i].sh_offset ));
3470 IF_DEBUG(linker,debugBelch(" (%p .. %p) ",
3471 ehdrC + shdr[i].sh_offset,
3472 ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1));
3474 if (shdr[i].sh_type == SHT_REL) {
3475 IF_DEBUG(linker,debugBelch("Rel " ));
3476 } else if (shdr[i].sh_type == SHT_RELA) {
3477 IF_DEBUG(linker,debugBelch("RelA " ));
3479 IF_DEBUG(linker,debugBelch(" "));
3482 IF_DEBUG(linker,debugBelch("sname=%s\n", sh_strtab + shdr[i].sh_name ));
3486 IF_DEBUG(linker,debugBelch( "\nString tables" ));
3489 for (i = 0; i < ehdr->e_shnum; i++) {
3490 if (shdr[i].sh_type == SHT_STRTAB
3491 /* Ignore the section header's string table. */
3492 && i != ehdr->e_shstrndx
3493 /* Ignore string tables named .stabstr, as they contain
3495 && 0 != memcmp(".stabstr", sh_strtab + shdr[i].sh_name, 8)
3497 IF_DEBUG(linker,debugBelch(" section %d is a normal string table", i ));
3498 strtab = ehdrC + shdr[i].sh_offset;
3503 errorBelch("%s: no string tables, or too many", oc->fileName);
3508 IF_DEBUG(linker,debugBelch( "\nSymbol tables" ));
3509 for (i = 0; i < ehdr->e_shnum; i++) {
3510 if (shdr[i].sh_type != SHT_SYMTAB) continue;
3511 IF_DEBUG(linker,debugBelch( "section %d is a symbol table\n", i ));
3513 stab = (Elf_Sym*) (ehdrC + shdr[i].sh_offset);
3514 nent = shdr[i].sh_size / sizeof(Elf_Sym);
3515 IF_DEBUG(linker,debugBelch( " number of entries is apparently %d (%ld rem)\n",
3517 (long)shdr[i].sh_size % sizeof(Elf_Sym)
3519 if (0 != shdr[i].sh_size % sizeof(Elf_Sym)) {
3520 errorBelch("%s: non-integral number of symbol table entries", oc->fileName);
3523 for (j = 0; j < nent; j++) {
3524 IF_DEBUG(linker,debugBelch(" %2d ", j ));
3525 IF_DEBUG(linker,debugBelch(" sec=%-5d size=%-3d val=%5p ",
3526 (int)stab[j].st_shndx,
3527 (int)stab[j].st_size,
3528 (char*)stab[j].st_value ));
3530 IF_DEBUG(linker,debugBelch("type=" ));
3531 switch (ELF_ST_TYPE(stab[j].st_info)) {
3532 case STT_NOTYPE: IF_DEBUG(linker,debugBelch("notype " )); break;
3533 case STT_OBJECT: IF_DEBUG(linker,debugBelch("object " )); break;
3534 case STT_FUNC : IF_DEBUG(linker,debugBelch("func " )); break;
3535 case STT_SECTION: IF_DEBUG(linker,debugBelch("section" )); break;
3536 case STT_FILE: IF_DEBUG(linker,debugBelch("file " )); break;
3537 default: IF_DEBUG(linker,debugBelch("? " )); break;
3539 IF_DEBUG(linker,debugBelch(" " ));
3541 IF_DEBUG(linker,debugBelch("bind=" ));
3542 switch (ELF_ST_BIND(stab[j].st_info)) {
3543 case STB_LOCAL : IF_DEBUG(linker,debugBelch("local " )); break;
3544 case STB_GLOBAL: IF_DEBUG(linker,debugBelch("global" )); break;
3545 case STB_WEAK : IF_DEBUG(linker,debugBelch("weak " )); break;
3546 default: IF_DEBUG(linker,debugBelch("? " )); break;
3548 IF_DEBUG(linker,debugBelch(" " ));
3550 IF_DEBUG(linker,debugBelch("name=%s\n", strtab + stab[j].st_name ));
3554 if (nsymtabs == 0) {
3555 errorBelch("%s: didn't find any symbol tables", oc->fileName);
3562 static int getSectionKind_ELF( Elf_Shdr *hdr, int *is_bss )
3566 if (hdr->sh_type == SHT_PROGBITS
3567 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_EXECINSTR)) {
3568 /* .text-style section */
3569 return SECTIONKIND_CODE_OR_RODATA;
3572 if (hdr->sh_type == SHT_PROGBITS
3573 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_WRITE)) {
3574 /* .data-style section */
3575 return SECTIONKIND_RWDATA;
3578 if (hdr->sh_type == SHT_PROGBITS
3579 && (hdr->sh_flags & SHF_ALLOC) && !(hdr->sh_flags & SHF_WRITE)) {
3580 /* .rodata-style section */
3581 return SECTIONKIND_CODE_OR_RODATA;
3584 if (hdr->sh_type == SHT_NOBITS
3585 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_WRITE)) {
3586 /* .bss-style section */
3588 return SECTIONKIND_RWDATA;
3591 return SECTIONKIND_OTHER;
3596 ocGetNames_ELF ( ObjectCode* oc )
3601 char* ehdrC = (char*)(oc->image);
3602 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3603 char* strtab = findElfSection ( ehdrC, SHT_STRTAB );
3604 Elf_Shdr* shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
3606 ASSERT(symhash != NULL);
3609 errorBelch("%s: no strtab", oc->fileName);
3614 for (i = 0; i < ehdr->e_shnum; i++) {
3615 /* Figure out what kind of section it is. Logic derived from
3616 Figure 1.14 ("Special Sections") of the ELF document
3617 ("Portable Formats Specification, Version 1.1"). */
3619 SectionKind kind = getSectionKind_ELF(&shdr[i], &is_bss);
3621 if (is_bss && shdr[i].sh_size > 0) {
3622 /* This is a non-empty .bss section. Allocate zeroed space for
3623 it, and set its .sh_offset field such that
3624 ehdrC + .sh_offset == addr_of_zeroed_space. */
3625 char* zspace = stgCallocBytes(1, shdr[i].sh_size,
3626 "ocGetNames_ELF(BSS)");
3627 shdr[i].sh_offset = ((char*)zspace) - ((char*)ehdrC);
3629 debugBelch("BSS section at 0x%x, size %d\n",
3630 zspace, shdr[i].sh_size);
3634 /* fill in the section info */
3635 if (kind != SECTIONKIND_OTHER && shdr[i].sh_size > 0) {
3636 addProddableBlock(oc, ehdrC + shdr[i].sh_offset, shdr[i].sh_size);
3637 addSection(oc, kind, ehdrC + shdr[i].sh_offset,
3638 ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1);
3641 if (shdr[i].sh_type != SHT_SYMTAB) continue;
3643 /* copy stuff into this module's object symbol table */
3644 stab = (Elf_Sym*) (ehdrC + shdr[i].sh_offset);
3645 nent = shdr[i].sh_size / sizeof(Elf_Sym);
3647 oc->n_symbols = nent;
3648 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
3649 "ocGetNames_ELF(oc->symbols)");
3651 for (j = 0; j < nent; j++) {
3653 char isLocal = FALSE; /* avoids uninit-var warning */
3655 char* nm = strtab + stab[j].st_name;
3656 int secno = stab[j].st_shndx;
3658 /* Figure out if we want to add it; if so, set ad to its
3659 address. Otherwise leave ad == NULL. */
3661 if (secno == SHN_COMMON) {
3663 ad = stgCallocBytes(1, stab[j].st_size, "ocGetNames_ELF(COMMON)");
3665 debugBelch("COMMON symbol, size %d name %s\n",
3666 stab[j].st_size, nm);
3668 /* Pointless to do addProddableBlock() for this area,
3669 since the linker should never poke around in it. */
3672 if ( ( ELF_ST_BIND(stab[j].st_info)==STB_GLOBAL
3673 || ELF_ST_BIND(stab[j].st_info)==STB_LOCAL
3675 /* and not an undefined symbol */
3676 && stab[j].st_shndx != SHN_UNDEF
3677 /* and not in a "special section" */
3678 && stab[j].st_shndx < SHN_LORESERVE
3680 /* and it's a not a section or string table or anything silly */
3681 ( ELF_ST_TYPE(stab[j].st_info)==STT_FUNC ||
3682 ELF_ST_TYPE(stab[j].st_info)==STT_OBJECT ||
3683 ELF_ST_TYPE(stab[j].st_info)==STT_NOTYPE
3686 /* Section 0 is the undefined section, hence > and not >=. */
3687 ASSERT(secno > 0 && secno < ehdr->e_shnum);
3689 if (shdr[secno].sh_type == SHT_NOBITS) {
3690 debugBelch(" BSS symbol, size %d off %d name %s\n",
3691 stab[j].st_size, stab[j].st_value, nm);
3694 ad = ehdrC + shdr[ secno ].sh_offset + stab[j].st_value;
3695 if (ELF_ST_BIND(stab[j].st_info)==STB_LOCAL) {
3698 #ifdef ELF_FUNCTION_DESC
3699 /* dlsym() and the initialisation table both give us function
3700 * descriptors, so to be consistent we store function descriptors
3701 * in the symbol table */
3702 if (ELF_ST_TYPE(stab[j].st_info) == STT_FUNC)
3703 ad = (char *)allocateFunctionDesc((Elf_Addr)ad);
3705 IF_DEBUG(linker,debugBelch( "addOTabName(GLOB): %10p %s %s\n",
3706 ad, oc->fileName, nm ));
3711 /* And the decision is ... */
3715 oc->symbols[j] = nm;
3718 /* Ignore entirely. */
3720 ghciInsertStrHashTable(oc->fileName, symhash, nm, ad);
3724 IF_DEBUG(linker,debugBelch( "skipping `%s'\n",
3725 strtab + stab[j].st_name ));
3728 "skipping bind = %d, type = %d, shndx = %d `%s'\n",
3729 (int)ELF_ST_BIND(stab[j].st_info),
3730 (int)ELF_ST_TYPE(stab[j].st_info),
3731 (int)stab[j].st_shndx,
3732 strtab + stab[j].st_name
3735 oc->symbols[j] = NULL;
3744 /* Do ELF relocations which lack an explicit addend. All x86-linux
3745 relocations appear to be of this form. */
3747 do_Elf_Rel_relocations ( ObjectCode* oc, char* ehdrC,
3748 Elf_Shdr* shdr, int shnum,
3749 Elf_Sym* stab, char* strtab )
3754 Elf_Rel* rtab = (Elf_Rel*) (ehdrC + shdr[shnum].sh_offset);
3755 int nent = shdr[shnum].sh_size / sizeof(Elf_Rel);
3756 int target_shndx = shdr[shnum].sh_info;
3757 int symtab_shndx = shdr[shnum].sh_link;
3759 stab = (Elf_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
3760 targ = (Elf_Word*)(ehdrC + shdr[ target_shndx ].sh_offset);
3761 IF_DEBUG(linker,debugBelch( "relocations for section %d using symtab %d\n",
3762 target_shndx, symtab_shndx ));
3764 /* Skip sections that we're not interested in. */
3767 SectionKind kind = getSectionKind_ELF(&shdr[target_shndx], &is_bss);
3768 if (kind == SECTIONKIND_OTHER) {
3769 IF_DEBUG(linker,debugBelch( "skipping (target section not loaded)"));
3774 for (j = 0; j < nent; j++) {
3775 Elf_Addr offset = rtab[j].r_offset;
3776 Elf_Addr info = rtab[j].r_info;
3778 Elf_Addr P = ((Elf_Addr)targ) + offset;
3779 Elf_Word* pP = (Elf_Word*)P;
3784 StgStablePtr stablePtr;
3787 IF_DEBUG(linker,debugBelch( "Rel entry %3d is raw(%6p %6p)",
3788 j, (void*)offset, (void*)info ));
3790 IF_DEBUG(linker,debugBelch( " ZERO" ));
3793 Elf_Sym sym = stab[ELF_R_SYM(info)];
3794 /* First see if it is a local symbol. */
3795 if (ELF_ST_BIND(sym.st_info) == STB_LOCAL) {
3796 /* Yes, so we can get the address directly from the ELF symbol
3798 symbol = sym.st_name==0 ? "(noname)" : strtab+sym.st_name;
3800 (ehdrC + shdr[ sym.st_shndx ].sh_offset
3801 + stab[ELF_R_SYM(info)].st_value);
3804 symbol = strtab + sym.st_name;
3805 stablePtr = (StgStablePtr)lookupHashTable(stablehash, (StgWord)symbol);
3806 if (NULL == stablePtr) {
3807 /* No, so look up the name in our global table. */
3808 S_tmp = lookupSymbol( symbol );
3809 S = (Elf_Addr)S_tmp;
3811 stableVal = deRefStablePtr( stablePtr );
3813 S = (Elf_Addr)S_tmp;
3817 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3820 IF_DEBUG(linker,debugBelch( "`%s' resolves to %p\n", symbol, (void*)S ));
3823 IF_DEBUG(linker,debugBelch( "Reloc: P = %p S = %p A = %p\n",
3824 (void*)P, (void*)S, (void*)A ));
3825 checkProddableBlock ( oc, pP );
3829 switch (ELF_R_TYPE(info)) {
3830 # ifdef i386_HOST_ARCH
3831 case R_386_32: *pP = value; break;
3832 case R_386_PC32: *pP = value - P; break;
3835 errorBelch("%s: unhandled ELF relocation(Rel) type %lu\n",
3836 oc->fileName, (lnat)ELF_R_TYPE(info));
3844 /* Do ELF relocations for which explicit addends are supplied.
3845 sparc-solaris relocations appear to be of this form. */
3847 do_Elf_Rela_relocations ( ObjectCode* oc, char* ehdrC,
3848 Elf_Shdr* shdr, int shnum,
3849 Elf_Sym* stab, char* strtab )
3852 char *symbol = NULL;
3854 Elf_Rela* rtab = (Elf_Rela*) (ehdrC + shdr[shnum].sh_offset);
3855 int nent = shdr[shnum].sh_size / sizeof(Elf_Rela);
3856 int target_shndx = shdr[shnum].sh_info;
3857 int symtab_shndx = shdr[shnum].sh_link;
3859 stab = (Elf_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
3860 targ = (Elf_Addr) (ehdrC + shdr[ target_shndx ].sh_offset);
3861 IF_DEBUG(linker,debugBelch( "relocations for section %d using symtab %d\n",
3862 target_shndx, symtab_shndx ));
3864 for (j = 0; j < nent; j++) {
3865 #if defined(DEBUG) || defined(sparc_HOST_ARCH) || defined(ia64_HOST_ARCH) || defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
3866 /* This #ifdef only serves to avoid unused-var warnings. */
3867 Elf_Addr offset = rtab[j].r_offset;
3868 Elf_Addr P = targ + offset;
3870 Elf_Addr info = rtab[j].r_info;
3871 Elf_Addr A = rtab[j].r_addend;
3875 # if defined(sparc_HOST_ARCH)
3876 Elf_Word* pP = (Elf_Word*)P;
3878 # elif defined(powerpc_HOST_ARCH)
3882 IF_DEBUG(linker,debugBelch( "Rel entry %3d is raw(%6p %6p %6p) ",
3883 j, (void*)offset, (void*)info,
3886 IF_DEBUG(linker,debugBelch( " ZERO" ));
3889 Elf_Sym sym = stab[ELF_R_SYM(info)];
3890 /* First see if it is a local symbol. */
3891 if (ELF_ST_BIND(sym.st_info) == STB_LOCAL) {
3892 /* Yes, so we can get the address directly from the ELF symbol
3894 symbol = sym.st_name==0 ? "(noname)" : strtab+sym.st_name;
3896 (ehdrC + shdr[ sym.st_shndx ].sh_offset
3897 + stab[ELF_R_SYM(info)].st_value);
3898 #ifdef ELF_FUNCTION_DESC
3899 /* Make a function descriptor for this function */
3900 if (S && ELF_ST_TYPE(sym.st_info) == STT_FUNC) {
3901 S = allocateFunctionDesc(S + A);
3906 /* No, so look up the name in our global table. */
3907 symbol = strtab + sym.st_name;
3908 S_tmp = lookupSymbol( symbol );
3909 S = (Elf_Addr)S_tmp;
3911 #ifdef ELF_FUNCTION_DESC
3912 /* If a function, already a function descriptor - we would
3913 have to copy it to add an offset. */
3914 if (S && (ELF_ST_TYPE(sym.st_info) == STT_FUNC) && (A != 0))
3915 errorBelch("%s: function %s with addend %p", oc->fileName, symbol, (void *)A);
3919 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3922 IF_DEBUG(linker,debugBelch( "`%s' resolves to %p", symbol, (void*)S ));
3925 IF_DEBUG(linker,debugBelch("Reloc: P = %p S = %p A = %p\n",
3926 (void*)P, (void*)S, (void*)A ));
3927 /* checkProddableBlock ( oc, (void*)P ); */
3931 switch (ELF_R_TYPE(info)) {
3932 # if defined(sparc_HOST_ARCH)
3933 case R_SPARC_WDISP30:
3934 w1 = *pP & 0xC0000000;
3935 w2 = (Elf_Word)((value - P) >> 2);
3936 ASSERT((w2 & 0xC0000000) == 0);
3941 w1 = *pP & 0xFFC00000;
3942 w2 = (Elf_Word)(value >> 10);
3943 ASSERT((w2 & 0xFFC00000) == 0);
3949 w2 = (Elf_Word)(value & 0x3FF);
3950 ASSERT((w2 & ~0x3FF) == 0);
3955 /* According to the Sun documentation:
3957 This relocation type resembles R_SPARC_32, except it refers to an
3958 unaligned word. That is, the word to be relocated must be treated
3959 as four separate bytes with arbitrary alignment, not as a word
3960 aligned according to the architecture requirements.
3963 w2 = (Elf_Word)value;
3965 // SPARC doesn't do misaligned writes of 32 bit words,
3966 // so we have to do this one byte-at-a-time.
3967 char *pPc = (char*)pP;
3968 pPc[0] = (char) ((Elf_Word)(w2 & 0xff000000) >> 24);
3969 pPc[1] = (char) ((Elf_Word)(w2 & 0x00ff0000) >> 16);
3970 pPc[2] = (char) ((Elf_Word)(w2 & 0x0000ff00) >> 8);
3971 pPc[3] = (char) ((Elf_Word)(w2 & 0x000000ff));
3975 w2 = (Elf_Word)value;
3978 # elif defined(powerpc_HOST_ARCH)
3979 case R_PPC_ADDR16_LO:
3980 *(Elf32_Half*) P = value;
3983 case R_PPC_ADDR16_HI:
3984 *(Elf32_Half*) P = value >> 16;
3987 case R_PPC_ADDR16_HA:
3988 *(Elf32_Half*) P = (value + 0x8000) >> 16;
3992 *(Elf32_Word *) P = value;
3996 *(Elf32_Word *) P = value - P;
4002 if( delta << 6 >> 6 != delta )
4004 value = (Elf_Addr) (&makeSymbolExtra( oc, ELF_R_SYM(info), value )
4008 if( value == 0 || delta << 6 >> 6 != delta )
4010 barf( "Unable to make SymbolExtra for #%d",
4016 *(Elf_Word *) P = (*(Elf_Word *) P & 0xfc000003)
4017 | (delta & 0x3fffffc);
4021 #if x86_64_HOST_ARCH
4023 *(Elf64_Xword *)P = value;
4028 #if defined(ALWAYS_PIC)
4029 barf("R_X86_64_PC32 relocation, but ALWAYS_PIC.");
4031 StgInt64 off = value - P;
4032 if (off >= 0x7fffffffL || off < -0x80000000L) {
4033 #if X86_64_ELF_NONPIC_HACK
4034 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4036 off = pltAddress + A - P;
4038 barf("R_X86_64_PC32 relocation out of range: %s = %p\nRecompile %s with -fPIC.",
4039 symbol, off, oc->fileName );
4042 *(Elf64_Word *)P = (Elf64_Word)off;
4049 StgInt64 off = value - P;
4050 *(Elf64_Word *)P = (Elf64_Word)off;
4055 #if defined(ALWAYS_PIC)
4056 barf("R_X86_64_32 relocation, but ALWAYS_PIC.");
4058 if (value >= 0x7fffffffL) {
4059 #if X86_64_ELF_NONPIC_HACK
4060 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4062 value = pltAddress + A;
4064 barf("R_X86_64_32 relocation out of range: %s = %p\nRecompile %s with -fPIC.",
4065 symbol, value, oc->fileName );
4068 *(Elf64_Word *)P = (Elf64_Word)value;
4073 #if defined(ALWAYS_PIC)
4074 barf("R_X86_64_32S relocation, but ALWAYS_PIC.");
4076 if ((StgInt64)value > 0x7fffffffL || (StgInt64)value < -0x80000000L) {
4077 #if X86_64_ELF_NONPIC_HACK
4078 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4080 value = pltAddress + A;
4082 barf("R_X86_64_32S relocation out of range: %s = %p\nRecompile %s with -fPIC.",
4083 symbol, value, oc->fileName );
4086 *(Elf64_Sword *)P = (Elf64_Sword)value;
4090 case R_X86_64_GOTPCREL:
4092 StgInt64 gotAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)->addr;
4093 StgInt64 off = gotAddress + A - P;
4094 *(Elf64_Word *)P = (Elf64_Word)off;
4098 case R_X86_64_PLT32:
4100 #if defined(ALWAYS_PIC)
4101 barf("R_X86_64_PLT32 relocation, but ALWAYS_PIC.");
4103 StgInt64 off = value - P;
4104 if (off >= 0x7fffffffL || off < -0x80000000L) {
4105 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
4107 off = pltAddress + A - P;
4109 *(Elf64_Word *)P = (Elf64_Word)off;
4116 errorBelch("%s: unhandled ELF relocation(RelA) type %lu\n",
4117 oc->fileName, (lnat)ELF_R_TYPE(info));
4126 ocResolve_ELF ( ObjectCode* oc )
4130 Elf_Sym* stab = NULL;
4131 char* ehdrC = (char*)(oc->image);
4132 Elf_Ehdr* ehdr = (Elf_Ehdr*) ehdrC;
4133 Elf_Shdr* shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
4135 /* first find "the" symbol table */
4136 stab = (Elf_Sym*) findElfSection ( ehdrC, SHT_SYMTAB );
4138 /* also go find the string table */
4139 strtab = findElfSection ( ehdrC, SHT_STRTAB );
4141 if (stab == NULL || strtab == NULL) {
4142 errorBelch("%s: can't find string or symbol table", oc->fileName);
4146 /* Process the relocation sections. */
4147 for (shnum = 0; shnum < ehdr->e_shnum; shnum++) {
4148 if (shdr[shnum].sh_type == SHT_REL) {
4149 ok = do_Elf_Rel_relocations ( oc, ehdrC, shdr,
4150 shnum, stab, strtab );
4154 if (shdr[shnum].sh_type == SHT_RELA) {
4155 ok = do_Elf_Rela_relocations ( oc, ehdrC, shdr,
4156 shnum, stab, strtab );
4161 #if defined(powerpc_HOST_ARCH)
4162 ocFlushInstructionCache( oc );
4169 * PowerPC & X86_64 ELF specifics
4172 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
4174 static int ocAllocateSymbolExtras_ELF( ObjectCode *oc )
4180 ehdr = (Elf_Ehdr *) oc->image;
4181 shdr = (Elf_Shdr *) ( ((char *)oc->image) + ehdr->e_shoff );
4183 for( i = 0; i < ehdr->e_shnum; i++ )
4184 if( shdr[i].sh_type == SHT_SYMTAB )
4187 if( i == ehdr->e_shnum )
4189 errorBelch( "This ELF file contains no symtab" );
4193 if( shdr[i].sh_entsize != sizeof( Elf_Sym ) )
4195 errorBelch( "The entry size (%d) of the symtab isn't %d\n",
4196 (int) shdr[i].sh_entsize, (int) sizeof( Elf_Sym ) );
4201 return ocAllocateSymbolExtras( oc, shdr[i].sh_size / sizeof( Elf_Sym ), 0 );
4204 #endif /* powerpc */
4208 /* --------------------------------------------------------------------------
4210 * ------------------------------------------------------------------------*/
4212 #if defined(OBJFORMAT_MACHO)
4215 Support for MachO linking on Darwin/MacOS X
4216 by Wolfgang Thaller (wolfgang.thaller@gmx.net)
4218 I hereby formally apologize for the hackish nature of this code.
4219 Things that need to be done:
4220 *) implement ocVerifyImage_MachO
4221 *) add still more sanity checks.
4224 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
4225 #define mach_header mach_header_64
4226 #define segment_command segment_command_64
4227 #define section section_64
4228 #define nlist nlist_64
4231 #ifdef powerpc_HOST_ARCH
4232 static int ocAllocateSymbolExtras_MachO(ObjectCode* oc)
4234 struct mach_header *header = (struct mach_header *) oc->image;
4235 struct load_command *lc = (struct load_command *) (header + 1);
4238 for( i = 0; i < header->ncmds; i++ )
4240 if( lc->cmd == LC_SYMTAB )
4242 // Find out the first and last undefined external
4243 // symbol, so we don't have to allocate too many
4245 struct symtab_command *symLC = (struct symtab_command *) lc;
4246 unsigned min = symLC->nsyms, max = 0;
4247 struct nlist *nlist =
4248 symLC ? (struct nlist*) ((char*) oc->image + symLC->symoff)
4250 for(i=0;i<symLC->nsyms;i++)
4252 if(nlist[i].n_type & N_STAB)
4254 else if(nlist[i].n_type & N_EXT)
4256 if((nlist[i].n_type & N_TYPE) == N_UNDF
4257 && (nlist[i].n_value == 0))
4267 return ocAllocateSymbolExtras(oc, max - min + 1, min);
4272 lc = (struct load_command *) ( ((char *)lc) + lc->cmdsize );
4274 return ocAllocateSymbolExtras(oc,0,0);
4277 #ifdef x86_64_HOST_ARCH
4278 static int ocAllocateSymbolExtras_MachO(ObjectCode* oc)
4280 struct mach_header *header = (struct mach_header *) oc->image;
4281 struct load_command *lc = (struct load_command *) (header + 1);
4284 for( i = 0; i < header->ncmds; i++ )
4286 if( lc->cmd == LC_SYMTAB )
4288 // Just allocate one entry for every symbol
4289 struct symtab_command *symLC = (struct symtab_command *) lc;
4291 return ocAllocateSymbolExtras(oc, symLC->nsyms, 0);
4294 lc = (struct load_command *) ( ((char *)lc) + lc->cmdsize );
4296 return ocAllocateSymbolExtras(oc,0,0);
4300 static int ocVerifyImage_MachO(ObjectCode* oc)
4302 char *image = (char*) oc->image;
4303 struct mach_header *header = (struct mach_header*) image;
4305 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
4306 if(header->magic != MH_MAGIC_64) {
4307 errorBelch("%s: Bad magic. Expected: %08x, got: %08x.\n",
4308 oc->fileName, MH_MAGIC_64, header->magic);
4312 if(header->magic != MH_MAGIC) {
4313 errorBelch("%s: Bad magic. Expected: %08x, got: %08x.\n",
4314 oc->fileName, MH_MAGIC, header->magic);
4318 // FIXME: do some more verifying here
4322 static int resolveImports(
4325 struct symtab_command *symLC,
4326 struct section *sect, // ptr to lazy or non-lazy symbol pointer section
4327 unsigned long *indirectSyms,
4328 struct nlist *nlist)
4331 size_t itemSize = 4;
4334 int isJumpTable = 0;
4335 if(!strcmp(sect->sectname,"__jump_table"))
4339 ASSERT(sect->reserved2 == itemSize);
4343 for(i=0; i*itemSize < sect->size;i++)
4345 // according to otool, reserved1 contains the first index into the indirect symbol table
4346 struct nlist *symbol = &nlist[indirectSyms[sect->reserved1+i]];
4347 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4350 if((symbol->n_type & N_TYPE) == N_UNDF
4351 && (symbol->n_type & N_EXT) && (symbol->n_value != 0))
4352 addr = (void*) (symbol->n_value);
4354 addr = lookupSymbol(nm);
4357 errorBelch("\n%s: unknown symbol `%s'", oc->fileName, nm);
4365 checkProddableBlock(oc,image + sect->offset + i*itemSize);
4366 *(image + sect->offset + i*itemSize) = 0xe9; // jmp
4367 *(unsigned*)(image + sect->offset + i*itemSize + 1)
4368 = (char*)addr - (image + sect->offset + i*itemSize + 5);
4373 checkProddableBlock(oc,((void**)(image + sect->offset)) + i);
4374 ((void**)(image + sect->offset))[i] = addr;
4381 static unsigned long relocateAddress(
4384 struct section* sections,
4385 unsigned long address)
4388 for(i = 0; i < nSections; i++)
4390 if(sections[i].addr <= address
4391 && address < sections[i].addr + sections[i].size)
4393 return (unsigned long)oc->image
4394 + sections[i].offset + address - sections[i].addr;
4397 barf("Invalid Mach-O file:"
4398 "Address out of bounds while relocating object file");
4402 static int relocateSection(
4405 struct symtab_command *symLC, struct nlist *nlist,
4406 int nSections, struct section* sections, struct section *sect)
4408 struct relocation_info *relocs;
4411 if(!strcmp(sect->sectname,"__la_symbol_ptr"))
4413 else if(!strcmp(sect->sectname,"__nl_symbol_ptr"))
4415 else if(!strcmp(sect->sectname,"__la_sym_ptr2"))
4417 else if(!strcmp(sect->sectname,"__la_sym_ptr3"))
4421 relocs = (struct relocation_info*) (image + sect->reloff);
4425 #ifdef x86_64_HOST_ARCH
4426 struct relocation_info *reloc = &relocs[i];
4428 char *thingPtr = image + sect->offset + reloc->r_address;
4430 /* We shouldn't need to initialise this, but gcc on OS X 64 bit
4431 complains that it may be used uninitialized if we don't */
4434 int type = reloc->r_type;
4436 checkProddableBlock(oc,thingPtr);
4437 switch(reloc->r_length)
4440 thing = *(uint8_t*)thingPtr;
4441 baseValue = (uint64_t)thingPtr + 1;
4444 thing = *(uint16_t*)thingPtr;
4445 baseValue = (uint64_t)thingPtr + 2;
4448 thing = *(uint32_t*)thingPtr;
4449 baseValue = (uint64_t)thingPtr + 4;
4452 thing = *(uint64_t*)thingPtr;
4453 baseValue = (uint64_t)thingPtr + 8;
4456 barf("Unknown size.");
4459 if(type == X86_64_RELOC_GOT
4460 || type == X86_64_RELOC_GOT_LOAD)
4462 ASSERT(reloc->r_extern);
4463 value = (uint64_t) &makeSymbolExtra(oc, reloc->r_symbolnum, value)->addr;
4465 type = X86_64_RELOC_SIGNED;
4467 else if(reloc->r_extern)
4469 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4470 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4471 if(symbol->n_value == 0)
4472 value = (uint64_t) lookupSymbol(nm);
4474 value = relocateAddress(oc, nSections, sections,
4479 value = sections[reloc->r_symbolnum-1].offset
4480 - sections[reloc->r_symbolnum-1].addr
4484 if(type == X86_64_RELOC_BRANCH)
4486 if((int32_t)(value - baseValue) != (int64_t)(value - baseValue))
4488 ASSERT(reloc->r_extern);
4489 value = (uint64_t) &makeSymbolExtra(oc, reloc->r_symbolnum, value)
4492 ASSERT((int32_t)(value - baseValue) == (int64_t)(value - baseValue));
4493 type = X86_64_RELOC_SIGNED;
4498 case X86_64_RELOC_UNSIGNED:
4499 ASSERT(!reloc->r_pcrel);
4502 case X86_64_RELOC_SIGNED:
4503 case X86_64_RELOC_SIGNED_1:
4504 case X86_64_RELOC_SIGNED_2:
4505 case X86_64_RELOC_SIGNED_4:
4506 ASSERT(reloc->r_pcrel);
4507 thing += value - baseValue;
4509 case X86_64_RELOC_SUBTRACTOR:
4510 ASSERT(!reloc->r_pcrel);
4514 barf("unkown relocation");
4517 switch(reloc->r_length)
4520 *(uint8_t*)thingPtr = thing;
4523 *(uint16_t*)thingPtr = thing;
4526 *(uint32_t*)thingPtr = thing;
4529 *(uint64_t*)thingPtr = thing;
4533 if(relocs[i].r_address & R_SCATTERED)
4535 struct scattered_relocation_info *scat =
4536 (struct scattered_relocation_info*) &relocs[i];
4540 if(scat->r_length == 2)
4542 unsigned long word = 0;
4543 unsigned long* wordPtr = (unsigned long*) (image + sect->offset + scat->r_address);
4544 checkProddableBlock(oc,wordPtr);
4546 // Note on relocation types:
4547 // i386 uses the GENERIC_RELOC_* types,
4548 // while ppc uses special PPC_RELOC_* types.
4549 // *_RELOC_VANILLA and *_RELOC_PAIR have the same value
4550 // in both cases, all others are different.
4551 // Therefore, we use GENERIC_RELOC_VANILLA
4552 // and GENERIC_RELOC_PAIR instead of the PPC variants,
4553 // and use #ifdefs for the other types.
4555 // Step 1: Figure out what the relocated value should be
4556 if(scat->r_type == GENERIC_RELOC_VANILLA)
4558 word = *wordPtr + (unsigned long) relocateAddress(
4565 #ifdef powerpc_HOST_ARCH
4566 else if(scat->r_type == PPC_RELOC_SECTDIFF
4567 || scat->r_type == PPC_RELOC_LO16_SECTDIFF
4568 || scat->r_type == PPC_RELOC_HI16_SECTDIFF
4569 || scat->r_type == PPC_RELOC_HA16_SECTDIFF
4570 || scat->r_type == PPC_RELOC_LOCAL_SECTDIFF)
4572 else if(scat->r_type == GENERIC_RELOC_SECTDIFF
4573 || scat->r_type == GENERIC_RELOC_LOCAL_SECTDIFF)
4576 struct scattered_relocation_info *pair =
4577 (struct scattered_relocation_info*) &relocs[i+1];
4579 if(!pair->r_scattered || pair->r_type != GENERIC_RELOC_PAIR)
4580 barf("Invalid Mach-O file: "
4581 "RELOC_*_SECTDIFF not followed by RELOC_PAIR");
4583 word = (unsigned long)
4584 (relocateAddress(oc, nSections, sections, scat->r_value)
4585 - relocateAddress(oc, nSections, sections, pair->r_value));
4588 #ifdef powerpc_HOST_ARCH
4589 else if(scat->r_type == PPC_RELOC_HI16
4590 || scat->r_type == PPC_RELOC_LO16
4591 || scat->r_type == PPC_RELOC_HA16
4592 || scat->r_type == PPC_RELOC_LO14)
4593 { // these are generated by label+offset things
4594 struct relocation_info *pair = &relocs[i+1];
4595 if((pair->r_address & R_SCATTERED) || pair->r_type != PPC_RELOC_PAIR)
4596 barf("Invalid Mach-O file: "
4597 "PPC_RELOC_* not followed by PPC_RELOC_PAIR");
4599 if(scat->r_type == PPC_RELOC_LO16)
4601 word = ((unsigned short*) wordPtr)[1];
4602 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4604 else if(scat->r_type == PPC_RELOC_LO14)
4606 barf("Unsupported Relocation: PPC_RELOC_LO14");
4607 word = ((unsigned short*) wordPtr)[1] & 0xFFFC;
4608 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4610 else if(scat->r_type == PPC_RELOC_HI16)
4612 word = ((unsigned short*) wordPtr)[1] << 16;
4613 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF);
4615 else if(scat->r_type == PPC_RELOC_HA16)
4617 word = ((unsigned short*) wordPtr)[1] << 16;
4618 word += ((short)relocs[i+1].r_address & (short)0xFFFF);
4622 word += (unsigned long) relocateAddress(oc, nSections, sections, scat->r_value)
4630 barf ("Don't know how to handle this Mach-O "
4631 "scattered relocation entry: "
4632 "object file %s; entry type %ld; "
4634 oc->fileName, scat->r_type, scat->r_address);
4638 #ifdef powerpc_HOST_ARCH
4639 if(scat->r_type == GENERIC_RELOC_VANILLA
4640 || scat->r_type == PPC_RELOC_SECTDIFF)
4642 if(scat->r_type == GENERIC_RELOC_VANILLA
4643 || scat->r_type == GENERIC_RELOC_SECTDIFF
4644 || scat->r_type == GENERIC_RELOC_LOCAL_SECTDIFF)
4649 #ifdef powerpc_HOST_ARCH
4650 else if(scat->r_type == PPC_RELOC_LO16_SECTDIFF || scat->r_type == PPC_RELOC_LO16)
4652 ((unsigned short*) wordPtr)[1] = word & 0xFFFF;
4654 else if(scat->r_type == PPC_RELOC_HI16_SECTDIFF || scat->r_type == PPC_RELOC_HI16)
4656 ((unsigned short*) wordPtr)[1] = (word >> 16) & 0xFFFF;
4658 else if(scat->r_type == PPC_RELOC_HA16_SECTDIFF || scat->r_type == PPC_RELOC_HA16)
4660 ((unsigned short*) wordPtr)[1] = ((word >> 16) & 0xFFFF)
4661 + ((word & (1<<15)) ? 1 : 0);
4667 barf("Can't handle Mach-O scattered relocation entry "
4668 "with this r_length tag: "
4669 "object file %s; entry type %ld; "
4670 "r_length tag %ld; address %#lx\n",
4671 oc->fileName, scat->r_type, scat->r_length,
4676 else /* scat->r_pcrel */
4678 barf("Don't know how to handle *PC-relative* Mach-O "
4679 "scattered relocation entry: "
4680 "object file %s; entry type %ld; address %#lx\n",
4681 oc->fileName, scat->r_type, scat->r_address);
4686 else /* !(relocs[i].r_address & R_SCATTERED) */
4688 struct relocation_info *reloc = &relocs[i];
4689 if(reloc->r_pcrel && !reloc->r_extern)
4692 if(reloc->r_length == 2)
4694 unsigned long word = 0;
4695 #ifdef powerpc_HOST_ARCH
4696 unsigned long jumpIsland = 0;
4697 long offsetToJumpIsland = 0xBADBAD42; // initialise to bad value
4698 // to avoid warning and to catch
4702 unsigned long* wordPtr = (unsigned long*) (image + sect->offset + reloc->r_address);
4703 checkProddableBlock(oc,wordPtr);
4705 if(reloc->r_type == GENERIC_RELOC_VANILLA)
4709 #ifdef powerpc_HOST_ARCH
4710 else if(reloc->r_type == PPC_RELOC_LO16)
4712 word = ((unsigned short*) wordPtr)[1];
4713 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4715 else if(reloc->r_type == PPC_RELOC_HI16)
4717 word = ((unsigned short*) wordPtr)[1] << 16;
4718 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF);
4720 else if(reloc->r_type == PPC_RELOC_HA16)
4722 word = ((unsigned short*) wordPtr)[1] << 16;
4723 word += ((short)relocs[i+1].r_address & (short)0xFFFF);
4725 else if(reloc->r_type == PPC_RELOC_BR24)
4728 word = (word & 0x03FFFFFC) | ((word & 0x02000000) ? 0xFC000000 : 0);
4733 barf("Can't handle this Mach-O relocation entry "
4735 "object file %s; entry type %ld; address %#lx\n",
4736 oc->fileName, reloc->r_type, reloc->r_address);
4740 if(!reloc->r_extern)
4743 sections[reloc->r_symbolnum-1].offset
4744 - sections[reloc->r_symbolnum-1].addr
4751 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4752 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4753 void *symbolAddress = lookupSymbol(nm);
4756 errorBelch("\nunknown symbol `%s'", nm);
4762 #ifdef powerpc_HOST_ARCH
4763 // In the .o file, this should be a relative jump to NULL
4764 // and we'll change it to a relative jump to the symbol
4765 ASSERT(word + reloc->r_address == 0);
4766 jumpIsland = (unsigned long)
4767 &makeSymbolExtra(oc,
4769 (unsigned long) symbolAddress)
4773 offsetToJumpIsland = word + jumpIsland
4774 - (((long)image) + sect->offset - sect->addr);
4777 word += (unsigned long) symbolAddress
4778 - (((long)image) + sect->offset - sect->addr);
4782 word += (unsigned long) symbolAddress;
4786 if(reloc->r_type == GENERIC_RELOC_VANILLA)
4791 #ifdef powerpc_HOST_ARCH
4792 else if(reloc->r_type == PPC_RELOC_LO16)
4794 ((unsigned short*) wordPtr)[1] = word & 0xFFFF;
4797 else if(reloc->r_type == PPC_RELOC_HI16)
4799 ((unsigned short*) wordPtr)[1] = (word >> 16) & 0xFFFF;
4802 else if(reloc->r_type == PPC_RELOC_HA16)
4804 ((unsigned short*) wordPtr)[1] = ((word >> 16) & 0xFFFF)
4805 + ((word & (1<<15)) ? 1 : 0);
4808 else if(reloc->r_type == PPC_RELOC_BR24)
4810 if((long)word > (long)0x01FFFFFF || (long)word < (long)0xFFE00000)
4812 // The branch offset is too large.
4813 // Therefore, we try to use a jump island.
4816 barf("unconditional relative branch out of range: "
4817 "no jump island available");
4820 word = offsetToJumpIsland;
4821 if((long)word > (long)0x01FFFFFF || (long)word < (long)0xFFE00000)
4822 barf("unconditional relative branch out of range: "
4823 "jump island out of range");
4825 *wordPtr = (*wordPtr & 0xFC000003) | (word & 0x03FFFFFC);
4832 barf("Can't handle Mach-O relocation entry (not scattered) "
4833 "with this r_length tag: "
4834 "object file %s; entry type %ld; "
4835 "r_length tag %ld; address %#lx\n",
4836 oc->fileName, reloc->r_type, reloc->r_length,
4846 static int ocGetNames_MachO(ObjectCode* oc)
4848 char *image = (char*) oc->image;
4849 struct mach_header *header = (struct mach_header*) image;
4850 struct load_command *lc = (struct load_command*) (image + sizeof(struct mach_header));
4851 unsigned i,curSymbol = 0;
4852 struct segment_command *segLC = NULL;
4853 struct section *sections;
4854 struct symtab_command *symLC = NULL;
4855 struct nlist *nlist;
4856 unsigned long commonSize = 0;
4857 char *commonStorage = NULL;
4858 unsigned long commonCounter;
4860 IF_DEBUG(linker,debugBelch("ocGetNames_MachO\n"));
4862 for(i=0;i<header->ncmds;i++)
4864 if(lc->cmd == LC_SEGMENT || lc->cmd == LC_SEGMENT_64)
4865 segLC = (struct segment_command*) lc;
4866 else if(lc->cmd == LC_SYMTAB)
4867 symLC = (struct symtab_command*) lc;
4868 lc = (struct load_command *) ( ((char*)lc) + lc->cmdsize );
4871 sections = (struct section*) (segLC+1);
4872 nlist = symLC ? (struct nlist*) (image + symLC->symoff)
4876 barf("ocGetNames_MachO: no segment load command");
4878 for(i=0;i<segLC->nsects;i++)
4880 if(sections[i].size == 0)
4883 if((sections[i].flags & SECTION_TYPE) == S_ZEROFILL)
4885 char * zeroFillArea = stgCallocBytes(1,sections[i].size,
4886 "ocGetNames_MachO(common symbols)");
4887 sections[i].offset = zeroFillArea - image;
4890 if(!strcmp(sections[i].sectname,"__text"))
4891 addSection(oc, SECTIONKIND_CODE_OR_RODATA,
4892 (void*) (image + sections[i].offset),
4893 (void*) (image + sections[i].offset + sections[i].size));
4894 else if(!strcmp(sections[i].sectname,"__const"))
4895 addSection(oc, SECTIONKIND_RWDATA,
4896 (void*) (image + sections[i].offset),
4897 (void*) (image + sections[i].offset + sections[i].size));
4898 else if(!strcmp(sections[i].sectname,"__data"))
4899 addSection(oc, SECTIONKIND_RWDATA,
4900 (void*) (image + sections[i].offset),
4901 (void*) (image + sections[i].offset + sections[i].size));
4902 else if(!strcmp(sections[i].sectname,"__bss")
4903 || !strcmp(sections[i].sectname,"__common"))
4904 addSection(oc, SECTIONKIND_RWDATA,
4905 (void*) (image + sections[i].offset),
4906 (void*) (image + sections[i].offset + sections[i].size));
4908 addProddableBlock(oc, (void*) (image + sections[i].offset),
4912 // count external symbols defined here
4916 for(i=0;i<symLC->nsyms;i++)
4918 if(nlist[i].n_type & N_STAB)
4920 else if(nlist[i].n_type & N_EXT)
4922 if((nlist[i].n_type & N_TYPE) == N_UNDF
4923 && (nlist[i].n_value != 0))
4925 commonSize += nlist[i].n_value;
4928 else if((nlist[i].n_type & N_TYPE) == N_SECT)
4933 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
4934 "ocGetNames_MachO(oc->symbols)");
4938 for(i=0;i<symLC->nsyms;i++)
4940 if(nlist[i].n_type & N_STAB)
4942 else if((nlist[i].n_type & N_TYPE) == N_SECT)
4944 if(nlist[i].n_type & N_EXT)
4946 char *nm = image + symLC->stroff + nlist[i].n_un.n_strx;
4947 if((nlist[i].n_desc & N_WEAK_DEF) && lookupSymbol(nm))
4948 ; // weak definition, and we already have a definition
4951 IF_DEBUG(linker,debugBelch("Adding symbol 1 %s\n", nm));
4952 ghciInsertStrHashTable(oc->fileName, symhash, nm,
4954 + sections[nlist[i].n_sect-1].offset
4955 - sections[nlist[i].n_sect-1].addr
4956 + nlist[i].n_value);
4957 oc->symbols[curSymbol++] = nm;
4964 commonStorage = stgCallocBytes(1,commonSize,"ocGetNames_MachO(common symbols)");
4965 commonCounter = (unsigned long)commonStorage;
4968 for(i=0;i<symLC->nsyms;i++)
4970 if((nlist[i].n_type & N_TYPE) == N_UNDF
4971 && (nlist[i].n_type & N_EXT) && (nlist[i].n_value != 0))
4973 char *nm = image + symLC->stroff + nlist[i].n_un.n_strx;
4974 unsigned long sz = nlist[i].n_value;
4976 nlist[i].n_value = commonCounter;
4978 IF_DEBUG(linker,debugBelch("Adding symbol 2 %s\n", nm));
4979 ghciInsertStrHashTable(oc->fileName, symhash, nm,
4980 (void*)commonCounter);
4981 oc->symbols[curSymbol++] = nm;
4983 commonCounter += sz;
4990 static int ocResolve_MachO(ObjectCode* oc)
4992 char *image = (char*) oc->image;
4993 struct mach_header *header = (struct mach_header*) image;
4994 struct load_command *lc = (struct load_command*) (image + sizeof(struct mach_header));
4996 struct segment_command *segLC = NULL;
4997 struct section *sections;
4998 struct symtab_command *symLC = NULL;
4999 struct dysymtab_command *dsymLC = NULL;
5000 struct nlist *nlist;
5002 for(i=0;i<header->ncmds;i++)
5004 if(lc->cmd == LC_SEGMENT || lc->cmd == LC_SEGMENT_64)
5005 segLC = (struct segment_command*) lc;
5006 else if(lc->cmd == LC_SYMTAB)
5007 symLC = (struct symtab_command*) lc;
5008 else if(lc->cmd == LC_DYSYMTAB)
5009 dsymLC = (struct dysymtab_command*) lc;
5010 lc = (struct load_command *) ( ((char*)lc) + lc->cmdsize );
5013 sections = (struct section*) (segLC+1);
5014 nlist = symLC ? (struct nlist*) (image + symLC->symoff)
5019 unsigned long *indirectSyms
5020 = (unsigned long*) (image + dsymLC->indirectsymoff);
5022 for(i=0;i<segLC->nsects;i++)
5024 if( !strcmp(sections[i].sectname,"__la_symbol_ptr")
5025 || !strcmp(sections[i].sectname,"__la_sym_ptr2")
5026 || !strcmp(sections[i].sectname,"__la_sym_ptr3"))
5028 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
5031 else if(!strcmp(sections[i].sectname,"__nl_symbol_ptr")
5032 || !strcmp(sections[i].sectname,"__pointers"))
5034 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
5037 else if(!strcmp(sections[i].sectname,"__jump_table"))
5039 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
5045 for(i=0;i<segLC->nsects;i++)
5047 if(!relocateSection(oc,image,symLC,nlist,segLC->nsects,sections,§ions[i]))
5051 #if defined (powerpc_HOST_ARCH)
5052 ocFlushInstructionCache( oc );
5058 #ifdef powerpc_HOST_ARCH
5060 * The Mach-O object format uses leading underscores. But not everywhere.
5061 * There is a small number of runtime support functions defined in
5062 * libcc_dynamic.a whose name does not have a leading underscore.
5063 * As a consequence, we can't get their address from C code.
5064 * We have to use inline assembler just to take the address of a function.
5068 extern void* symbolsWithoutUnderscore[];
5070 static void machoInitSymbolsWithoutUnderscore()
5072 void **p = symbolsWithoutUnderscore;
5073 __asm__ volatile(".globl _symbolsWithoutUnderscore\n.data\n_symbolsWithoutUnderscore:");
5075 #undef SymI_NeedsProto
5076 #define SymI_NeedsProto(x) \
5077 __asm__ volatile(".long " # x);
5079 RTS_MACHO_NOUNDERLINE_SYMBOLS
5081 __asm__ volatile(".text");
5083 #undef SymI_NeedsProto
5084 #define SymI_NeedsProto(x) \
5085 ghciInsertStrHashTable("(GHCi built-in symbols)", symhash, #x, *p++);
5087 RTS_MACHO_NOUNDERLINE_SYMBOLS
5089 #undef SymI_NeedsProto
5095 * Figure out by how much to shift the entire Mach-O file in memory
5096 * when loading so that its single segment ends up 16-byte-aligned
5098 static int machoGetMisalignment( FILE * f )
5100 struct mach_header header;
5103 fread(&header, sizeof(header), 1, f);
5106 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
5107 if(header.magic != MH_MAGIC_64) {
5108 errorBelch("Bad magic. Expected: %08x, got: %08x.\n",
5109 MH_MAGIC_64, header->magic);
5113 if(header.magic != MH_MAGIC) {
5114 errorBelch("Bad magic. Expected: %08x, got: %08x.\n",
5115 MH_MAGIC, header->magic);
5120 misalignment = (header.sizeofcmds + sizeof(header))
5123 return misalignment ? (16 - misalignment) : 0;