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>.
25 #include "LinkerInternals.h"
29 #include "RtsTypeable.h"
32 #ifdef HAVE_SYS_TYPES_H
33 #include <sys/types.h>
39 #ifdef HAVE_SYS_STAT_H
43 #if defined(HAVE_DLFCN_H)
47 #if defined(cygwin32_HOST_OS)
52 #ifdef HAVE_SYS_TIME_H
56 #include <sys/fcntl.h>
57 #include <sys/termios.h>
58 #include <sys/utime.h>
59 #include <sys/utsname.h>
63 #if defined(ia64_HOST_ARCH) || defined(linux_HOST_OS) || defined(freebsd_HOST_OS) || defined(netbsd_HOST_OS) || defined(openbsd_HOST_OS)
68 #if defined(linux_HOST_OS) || defined(freebsd_HOST_OS) || defined(netbsd_HOST_OS) || defined(openbsd_HOST_OS)
76 #if defined(linux_HOST_OS) || defined(solaris2_HOST_OS) || defined(freebsd_HOST_OS) || defined(netbsd_HOST_OS) || defined(openbsd_HOST_OS)
77 # define OBJFORMAT_ELF
78 #elif defined(cygwin32_HOST_OS) || defined (mingw32_HOST_OS)
79 # define OBJFORMAT_PEi386
82 #elif defined(darwin_HOST_OS)
83 # define OBJFORMAT_MACHO
84 # include <mach-o/loader.h>
85 # include <mach-o/nlist.h>
86 # include <mach-o/reloc.h>
87 #if !defined(HAVE_DLFCN_H)
88 # include <mach-o/dyld.h>
90 #if defined(powerpc_HOST_ARCH)
91 # include <mach-o/ppc/reloc.h>
93 #if defined(x86_64_HOST_ARCH)
94 # include <mach-o/x86_64/reloc.h>
98 /* Hash table mapping symbol names to Symbol */
99 static /*Str*/HashTable *symhash;
101 /* Hash table mapping symbol names to StgStablePtr */
102 static /*Str*/HashTable *stablehash;
104 /* List of currently loaded objects */
105 ObjectCode *objects = NULL; /* initially empty */
107 #if defined(OBJFORMAT_ELF)
108 static int ocVerifyImage_ELF ( ObjectCode* oc );
109 static int ocGetNames_ELF ( ObjectCode* oc );
110 static int ocResolve_ELF ( ObjectCode* oc );
111 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
112 static int ocAllocateSymbolExtras_ELF ( ObjectCode* oc );
114 #elif defined(OBJFORMAT_PEi386)
115 static int ocVerifyImage_PEi386 ( ObjectCode* oc );
116 static int ocGetNames_PEi386 ( ObjectCode* oc );
117 static int ocResolve_PEi386 ( ObjectCode* oc );
118 static void *lookupSymbolInDLLs ( unsigned char *lbl );
119 static void zapTrailingAtSign ( unsigned char *sym );
120 #elif defined(OBJFORMAT_MACHO)
121 static int ocVerifyImage_MachO ( ObjectCode* oc );
122 static int ocGetNames_MachO ( ObjectCode* oc );
123 static int ocResolve_MachO ( ObjectCode* oc );
125 static int machoGetMisalignment( FILE * );
126 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
127 static int ocAllocateSymbolExtras_MachO ( ObjectCode* oc );
129 #ifdef powerpc_HOST_ARCH
130 static void machoInitSymbolsWithoutUnderscore( void );
134 /* on x86_64 we have a problem with relocating symbol references in
135 * code that was compiled without -fPIC. By default, the small memory
136 * model is used, which assumes that symbol references can fit in a
137 * 32-bit slot. The system dynamic linker makes this work for
138 * references to shared libraries by either (a) allocating a jump
139 * table slot for code references, or (b) moving the symbol at load
140 * time (and copying its contents, if necessary) for data references.
142 * We unfortunately can't tell whether symbol references are to code
143 * or data. So for now we assume they are code (the vast majority
144 * are), and allocate jump-table slots. Unfortunately this will
145 * SILENTLY generate crashing code for data references. This hack is
146 * enabled by X86_64_ELF_NONPIC_HACK.
148 * One workaround is to use shared Haskell libraries. This is
149 * coming. Another workaround is to keep the static libraries but
150 * compile them with -fPIC, because that will generate PIC references
151 * to data which can be relocated. The PIC code is still too green to
152 * do this systematically, though.
155 * See thread http://www.haskell.org/pipermail/cvs-ghc/2007-September/038458.html
157 * Naming Scheme for Symbol Macros
159 * SymI_*: symbol is internal to the RTS. It resides in an object
160 * file/library that is statically.
161 * SymE_*: symbol is external to the RTS library. It might be linked
164 * Sym*_HasProto : the symbol prototype is imported in an include file
165 * or defined explicitly
166 * Sym*_NeedsProto: the symbol is undefined and we add a dummy
167 * default proto extern void sym(void);
169 #define X86_64_ELF_NONPIC_HACK 1
171 /* -----------------------------------------------------------------------------
172 * Built-in symbols from the RTS
175 typedef struct _RtsSymbolVal {
181 #define Maybe_Stable_Names SymI_HasProto(mkWeakzh_fast) \
182 SymI_HasProto(makeStableNamezh_fast) \
183 SymI_HasProto(finalizzeWeakzh_fast)
185 /* These are not available in GUM!!! -- HWL */
186 #define Maybe_Stable_Names
189 #if !defined (mingw32_HOST_OS)
190 #define RTS_POSIX_ONLY_SYMBOLS \
191 SymI_HasProto(shutdownHaskellAndSignal) \
192 SymI_NeedsProto(lockFile) \
193 SymI_NeedsProto(unlockFile) \
194 SymI_HasProto(signal_handlers) \
195 SymI_HasProto(stg_sig_install) \
196 SymI_NeedsProto(nocldstop)
199 #if defined (cygwin32_HOST_OS)
200 #define RTS_MINGW_ONLY_SYMBOLS /**/
201 /* Don't have the ability to read import libs / archives, so
202 * we have to stupidly list a lot of what libcygwin.a
205 #define RTS_CYGWIN_ONLY_SYMBOLS \
206 SymI_HasProto(regfree) \
207 SymI_HasProto(regexec) \
208 SymI_HasProto(regerror) \
209 SymI_HasProto(regcomp) \
210 SymI_HasProto(__errno) \
211 SymI_HasProto(access) \
212 SymI_HasProto(chmod) \
213 SymI_HasProto(chdir) \
214 SymI_HasProto(close) \
215 SymI_HasProto(creat) \
217 SymI_HasProto(dup2) \
218 SymI_HasProto(fstat) \
219 SymI_HasProto(fcntl) \
220 SymI_HasProto(getcwd) \
221 SymI_HasProto(getenv) \
222 SymI_HasProto(lseek) \
223 SymI_HasProto(open) \
224 SymI_HasProto(fpathconf) \
225 SymI_HasProto(pathconf) \
226 SymI_HasProto(stat) \
228 SymI_HasProto(tanh) \
229 SymI_HasProto(cosh) \
230 SymI_HasProto(sinh) \
231 SymI_HasProto(atan) \
232 SymI_HasProto(acos) \
233 SymI_HasProto(asin) \
239 SymI_HasProto(sqrt) \
240 SymI_HasProto(localtime_r) \
241 SymI_HasProto(gmtime_r) \
242 SymI_HasProto(mktime) \
243 SymI_NeedsProto(_imp___tzname) \
244 SymI_HasProto(gettimeofday) \
245 SymI_HasProto(timezone) \
246 SymI_HasProto(tcgetattr) \
247 SymI_HasProto(tcsetattr) \
248 SymI_HasProto(memcpy) \
249 SymI_HasProto(memmove) \
250 SymI_HasProto(realloc) \
251 SymI_HasProto(malloc) \
252 SymI_HasProto(free) \
253 SymI_HasProto(fork) \
254 SymI_HasProto(lstat) \
255 SymI_HasProto(isatty) \
256 SymI_HasProto(mkdir) \
257 SymI_HasProto(opendir) \
258 SymI_HasProto(readdir) \
259 SymI_HasProto(rewinddir) \
260 SymI_HasProto(closedir) \
261 SymI_HasProto(link) \
262 SymI_HasProto(mkfifo) \
263 SymI_HasProto(pipe) \
264 SymI_HasProto(read) \
265 SymI_HasProto(rename) \
266 SymI_HasProto(rmdir) \
267 SymI_HasProto(select) \
268 SymI_HasProto(system) \
269 SymI_HasProto(write) \
270 SymI_HasProto(strcmp) \
271 SymI_HasProto(strcpy) \
272 SymI_HasProto(strncpy) \
273 SymI_HasProto(strerror) \
274 SymI_HasProto(sigaddset) \
275 SymI_HasProto(sigemptyset) \
276 SymI_HasProto(sigprocmask) \
277 SymI_HasProto(umask) \
278 SymI_HasProto(uname) \
279 SymI_HasProto(unlink) \
280 SymI_HasProto(utime) \
281 SymI_HasProto(waitpid)
283 #elif !defined(mingw32_HOST_OS)
284 #define RTS_MINGW_ONLY_SYMBOLS /**/
285 #define RTS_CYGWIN_ONLY_SYMBOLS /**/
286 #else /* defined(mingw32_HOST_OS) */
287 #define RTS_POSIX_ONLY_SYMBOLS /**/
288 #define RTS_CYGWIN_ONLY_SYMBOLS /**/
290 /* Extra syms gen'ed by mingw-2's gcc-3.2: */
292 #define RTS_MINGW_EXTRA_SYMS \
293 SymI_NeedsProto(_imp____mb_cur_max) \
294 SymI_NeedsProto(_imp___pctype)
296 #define RTS_MINGW_EXTRA_SYMS
299 #if HAVE_GETTIMEOFDAY
300 #define RTS_MINGW_GETTIMEOFDAY_SYM SymI_NeedsProto(gettimeofday)
302 #define RTS_MINGW_GETTIMEOFDAY_SYM /**/
305 /* These are statically linked from the mingw libraries into the ghc
306 executable, so we have to employ this hack. */
307 #define RTS_MINGW_ONLY_SYMBOLS \
308 SymI_HasProto(asyncReadzh_fast) \
309 SymI_HasProto(asyncWritezh_fast) \
310 SymI_HasProto(asyncDoProczh_fast) \
311 SymI_HasProto(memset) \
312 SymI_HasProto(inet_ntoa) \
313 SymI_HasProto(inet_addr) \
314 SymI_HasProto(htonl) \
315 SymI_HasProto(recvfrom) \
316 SymI_HasProto(listen) \
317 SymI_HasProto(bind) \
318 SymI_HasProto(shutdown) \
319 SymI_HasProto(connect) \
320 SymI_HasProto(htons) \
321 SymI_HasProto(ntohs) \
322 SymI_HasProto(getservbyname) \
323 SymI_HasProto(getservbyport) \
324 SymI_HasProto(getprotobynumber) \
325 SymI_HasProto(getprotobyname) \
326 SymI_HasProto(gethostbyname) \
327 SymI_HasProto(gethostbyaddr) \
328 SymI_HasProto(gethostname) \
329 SymI_HasProto(strcpy) \
330 SymI_HasProto(strncpy) \
331 SymI_HasProto(abort) \
332 SymI_NeedsProto(_alloca) \
333 SymI_NeedsProto(isxdigit) \
334 SymI_NeedsProto(isupper) \
335 SymI_NeedsProto(ispunct) \
336 SymI_NeedsProto(islower) \
337 SymI_NeedsProto(isspace) \
338 SymI_NeedsProto(isprint) \
339 SymI_NeedsProto(isdigit) \
340 SymI_NeedsProto(iscntrl) \
341 SymI_NeedsProto(isalpha) \
342 SymI_NeedsProto(isalnum) \
343 SymI_HasProto(strcmp) \
344 SymI_HasProto(memmove) \
345 SymI_HasProto(realloc) \
346 SymI_HasProto(malloc) \
348 SymI_HasProto(tanh) \
349 SymI_HasProto(cosh) \
350 SymI_HasProto(sinh) \
351 SymI_HasProto(atan) \
352 SymI_HasProto(acos) \
353 SymI_HasProto(asin) \
359 SymI_HasProto(sqrt) \
360 SymI_HasProto(powf) \
361 SymI_HasProto(tanhf) \
362 SymI_HasProto(coshf) \
363 SymI_HasProto(sinhf) \
364 SymI_HasProto(atanf) \
365 SymI_HasProto(acosf) \
366 SymI_HasProto(asinf) \
367 SymI_HasProto(tanf) \
368 SymI_HasProto(cosf) \
369 SymI_HasProto(sinf) \
370 SymI_HasProto(expf) \
371 SymI_HasProto(logf) \
372 SymI_HasProto(sqrtf) \
373 SymI_HasProto(memcpy) \
374 SymI_HasProto(rts_InstallConsoleEvent) \
375 SymI_HasProto(rts_ConsoleHandlerDone) \
376 SymI_NeedsProto(mktime) \
377 SymI_NeedsProto(_imp___timezone) \
378 SymI_NeedsProto(_imp___tzname) \
379 SymI_NeedsProto(_imp__tzname) \
380 SymI_NeedsProto(_imp___iob) \
381 SymI_NeedsProto(_imp___osver) \
382 SymI_NeedsProto(localtime) \
383 SymI_NeedsProto(gmtime) \
384 SymI_NeedsProto(opendir) \
385 SymI_NeedsProto(readdir) \
386 SymI_NeedsProto(rewinddir) \
387 RTS_MINGW_EXTRA_SYMS \
388 RTS_MINGW_GETTIMEOFDAY_SYM \
389 SymI_NeedsProto(closedir)
392 #if defined(darwin_TARGET_OS) && HAVE_PRINTF_LDBLSTUB
393 #define RTS_DARWIN_ONLY_SYMBOLS \
394 SymI_NeedsProto(asprintf$LDBLStub) \
395 SymI_NeedsProto(err$LDBLStub) \
396 SymI_NeedsProto(errc$LDBLStub) \
397 SymI_NeedsProto(errx$LDBLStub) \
398 SymI_NeedsProto(fprintf$LDBLStub) \
399 SymI_NeedsProto(fscanf$LDBLStub) \
400 SymI_NeedsProto(fwprintf$LDBLStub) \
401 SymI_NeedsProto(fwscanf$LDBLStub) \
402 SymI_NeedsProto(printf$LDBLStub) \
403 SymI_NeedsProto(scanf$LDBLStub) \
404 SymI_NeedsProto(snprintf$LDBLStub) \
405 SymI_NeedsProto(sprintf$LDBLStub) \
406 SymI_NeedsProto(sscanf$LDBLStub) \
407 SymI_NeedsProto(strtold$LDBLStub) \
408 SymI_NeedsProto(swprintf$LDBLStub) \
409 SymI_NeedsProto(swscanf$LDBLStub) \
410 SymI_NeedsProto(syslog$LDBLStub) \
411 SymI_NeedsProto(vasprintf$LDBLStub) \
412 SymI_NeedsProto(verr$LDBLStub) \
413 SymI_NeedsProto(verrc$LDBLStub) \
414 SymI_NeedsProto(verrx$LDBLStub) \
415 SymI_NeedsProto(vfprintf$LDBLStub) \
416 SymI_NeedsProto(vfscanf$LDBLStub) \
417 SymI_NeedsProto(vfwprintf$LDBLStub) \
418 SymI_NeedsProto(vfwscanf$LDBLStub) \
419 SymI_NeedsProto(vprintf$LDBLStub) \
420 SymI_NeedsProto(vscanf$LDBLStub) \
421 SymI_NeedsProto(vsnprintf$LDBLStub) \
422 SymI_NeedsProto(vsprintf$LDBLStub) \
423 SymI_NeedsProto(vsscanf$LDBLStub) \
424 SymI_NeedsProto(vswprintf$LDBLStub) \
425 SymI_NeedsProto(vswscanf$LDBLStub) \
426 SymI_NeedsProto(vsyslog$LDBLStub) \
427 SymI_NeedsProto(vwarn$LDBLStub) \
428 SymI_NeedsProto(vwarnc$LDBLStub) \
429 SymI_NeedsProto(vwarnx$LDBLStub) \
430 SymI_NeedsProto(vwprintf$LDBLStub) \
431 SymI_NeedsProto(vwscanf$LDBLStub) \
432 SymI_NeedsProto(warn$LDBLStub) \
433 SymI_NeedsProto(warnc$LDBLStub) \
434 SymI_NeedsProto(warnx$LDBLStub) \
435 SymI_NeedsProto(wcstold$LDBLStub) \
436 SymI_NeedsProto(wprintf$LDBLStub) \
437 SymI_NeedsProto(wscanf$LDBLStub)
439 #define RTS_DARWIN_ONLY_SYMBOLS
443 # define MAIN_CAP_SYM SymI_HasProto(MainCapability)
445 # define MAIN_CAP_SYM
448 #if !defined(mingw32_HOST_OS)
449 #define RTS_USER_SIGNALS_SYMBOLS \
450 SymI_HasProto(setIOManagerPipe)
452 #define RTS_USER_SIGNALS_SYMBOLS \
453 SymI_HasProto(sendIOManagerEvent) \
454 SymI_HasProto(readIOManagerEvent) \
455 SymI_HasProto(getIOManagerEvent) \
456 SymI_HasProto(console_handler)
459 #define RTS_LIBFFI_SYMBOLS \
460 SymE_NeedsProto(ffi_prep_cif) \
461 SymE_NeedsProto(ffi_call) \
462 SymE_NeedsProto(ffi_type_void) \
463 SymE_NeedsProto(ffi_type_float) \
464 SymE_NeedsProto(ffi_type_double) \
465 SymE_NeedsProto(ffi_type_sint64) \
466 SymE_NeedsProto(ffi_type_uint64) \
467 SymE_NeedsProto(ffi_type_sint32) \
468 SymE_NeedsProto(ffi_type_uint32) \
469 SymE_NeedsProto(ffi_type_sint16) \
470 SymE_NeedsProto(ffi_type_uint16) \
471 SymE_NeedsProto(ffi_type_sint8) \
472 SymE_NeedsProto(ffi_type_uint8) \
473 SymE_NeedsProto(ffi_type_pointer)
475 #ifdef TABLES_NEXT_TO_CODE
476 #define RTS_RET_SYMBOLS /* nothing */
478 #define RTS_RET_SYMBOLS \
479 SymI_HasProto(stg_enter_ret) \
480 SymI_HasProto(stg_gc_fun_ret) \
481 SymI_HasProto(stg_ap_v_ret) \
482 SymI_HasProto(stg_ap_f_ret) \
483 SymI_HasProto(stg_ap_d_ret) \
484 SymI_HasProto(stg_ap_l_ret) \
485 SymI_HasProto(stg_ap_n_ret) \
486 SymI_HasProto(stg_ap_p_ret) \
487 SymI_HasProto(stg_ap_pv_ret) \
488 SymI_HasProto(stg_ap_pp_ret) \
489 SymI_HasProto(stg_ap_ppv_ret) \
490 SymI_HasProto(stg_ap_ppp_ret) \
491 SymI_HasProto(stg_ap_pppv_ret) \
492 SymI_HasProto(stg_ap_pppp_ret) \
493 SymI_HasProto(stg_ap_ppppp_ret) \
494 SymI_HasProto(stg_ap_pppppp_ret)
497 /* On Windows, we link libgmp.a statically into libHSrts.dll */
498 #ifdef mingw32_HOST_OS
500 SymI_HasProto(__gmpz_cmp) \
501 SymI_HasProto(__gmpz_cmp_si) \
502 SymI_HasProto(__gmpz_cmp_ui) \
503 SymI_HasProto(__gmpz_get_si) \
504 SymI_HasProto(__gmpz_get_ui)
507 SymE_HasProto(__gmpz_cmp) \
508 SymE_HasProto(__gmpz_cmp_si) \
509 SymE_HasProto(__gmpz_cmp_ui) \
510 SymE_HasProto(__gmpz_get_si) \
511 SymE_HasProto(__gmpz_get_ui)
514 #define RTS_SYMBOLS \
516 SymI_HasProto(StgReturn) \
517 SymI_HasProto(stg_enter_info) \
518 SymI_HasProto(stg_gc_void_info) \
519 SymI_HasProto(__stg_gc_enter_1) \
520 SymI_HasProto(stg_gc_noregs) \
521 SymI_HasProto(stg_gc_unpt_r1_info) \
522 SymI_HasProto(stg_gc_unpt_r1) \
523 SymI_HasProto(stg_gc_unbx_r1_info) \
524 SymI_HasProto(stg_gc_unbx_r1) \
525 SymI_HasProto(stg_gc_f1_info) \
526 SymI_HasProto(stg_gc_f1) \
527 SymI_HasProto(stg_gc_d1_info) \
528 SymI_HasProto(stg_gc_d1) \
529 SymI_HasProto(stg_gc_l1_info) \
530 SymI_HasProto(stg_gc_l1) \
531 SymI_HasProto(__stg_gc_fun) \
532 SymI_HasProto(stg_gc_fun_info) \
533 SymI_HasProto(stg_gc_gen) \
534 SymI_HasProto(stg_gc_gen_info) \
535 SymI_HasProto(stg_gc_gen_hp) \
536 SymI_HasProto(stg_gc_ut) \
537 SymI_HasProto(stg_gen_yield) \
538 SymI_HasProto(stg_yield_noregs) \
539 SymI_HasProto(stg_yield_to_interpreter) \
540 SymI_HasProto(stg_gen_block) \
541 SymI_HasProto(stg_block_noregs) \
542 SymI_HasProto(stg_block_1) \
543 SymI_HasProto(stg_block_takemvar) \
544 SymI_HasProto(stg_block_putmvar) \
546 SymI_HasProto(MallocFailHook) \
547 SymI_HasProto(OnExitHook) \
548 SymI_HasProto(OutOfHeapHook) \
549 SymI_HasProto(StackOverflowHook) \
550 SymI_HasProto(__encodeDouble) \
551 SymI_HasProto(__encodeFloat) \
552 SymI_HasProto(addDLL) \
554 SymI_HasProto(__int_encodeDouble) \
555 SymI_HasProto(__word_encodeDouble) \
556 SymI_HasProto(__2Int_encodeDouble) \
557 SymI_HasProto(__int_encodeFloat) \
558 SymI_HasProto(__word_encodeFloat) \
559 SymI_HasProto(andIntegerzh_fast) \
560 SymI_HasProto(atomicallyzh_fast) \
561 SymI_HasProto(barf) \
562 SymI_HasProto(debugBelch) \
563 SymI_HasProto(errorBelch) \
564 SymI_HasProto(asyncExceptionsBlockedzh_fast) \
565 SymI_HasProto(blockAsyncExceptionszh_fast) \
566 SymI_HasProto(catchzh_fast) \
567 SymI_HasProto(catchRetryzh_fast) \
568 SymI_HasProto(catchSTMzh_fast) \
569 SymI_HasProto(checkzh_fast) \
570 SymI_HasProto(closure_flags) \
571 SymI_HasProto(cmp_thread) \
572 SymI_HasProto(cmpIntegerzh_fast) \
573 SymI_HasProto(cmpIntegerIntzh_fast) \
574 SymI_HasProto(complementIntegerzh_fast) \
575 SymI_HasProto(createAdjustor) \
576 SymI_HasProto(decodeDoublezh_fast) \
577 SymI_HasProto(decodeFloatzh_fast) \
578 SymI_HasProto(decodeDoublezu2Intzh_fast) \
579 SymI_HasProto(decodeFloatzuIntzh_fast) \
580 SymI_HasProto(defaultsHook) \
581 SymI_HasProto(delayzh_fast) \
582 SymI_HasProto(deRefWeakzh_fast) \
583 SymI_HasProto(deRefStablePtrzh_fast) \
584 SymI_HasProto(dirty_MUT_VAR) \
585 SymI_HasProto(divExactIntegerzh_fast) \
586 SymI_HasProto(divModIntegerzh_fast) \
587 SymI_HasProto(forkzh_fast) \
588 SymI_HasProto(forkOnzh_fast) \
589 SymI_HasProto(forkProcess) \
590 SymI_HasProto(forkOS_createThread) \
591 SymI_HasProto(freeHaskellFunctionPtr) \
592 SymI_HasProto(freeStablePtr) \
593 SymI_HasProto(getOrSetTypeableStore) \
594 SymI_HasProto(gcdIntegerzh_fast) \
595 SymI_HasProto(gcdIntegerIntzh_fast) \
596 SymI_HasProto(gcdIntzh_fast) \
597 SymI_HasProto(genSymZh) \
598 SymI_HasProto(genericRaise) \
599 SymI_HasProto(getProgArgv) \
600 SymI_HasProto(getFullProgArgv) \
601 SymI_HasProto(getStablePtr) \
602 SymI_HasProto(hs_init) \
603 SymI_HasProto(hs_exit) \
604 SymI_HasProto(hs_set_argv) \
605 SymI_HasProto(hs_add_root) \
606 SymI_HasProto(hs_perform_gc) \
607 SymI_HasProto(hs_free_stable_ptr) \
608 SymI_HasProto(hs_free_fun_ptr) \
609 SymI_HasProto(hs_hpc_rootModule) \
610 SymI_HasProto(initLinker) \
611 SymI_HasProto(unpackClosurezh_fast) \
612 SymI_HasProto(getApStackValzh_fast) \
613 SymI_HasProto(getSparkzh_fast) \
614 SymI_HasProto(int2Integerzh_fast) \
615 SymI_HasProto(integer2Intzh_fast) \
616 SymI_HasProto(integer2Wordzh_fast) \
617 SymI_HasProto(isCurrentThreadBoundzh_fast) \
618 SymI_HasProto(isDoubleDenormalized) \
619 SymI_HasProto(isDoubleInfinite) \
620 SymI_HasProto(isDoubleNaN) \
621 SymI_HasProto(isDoubleNegativeZero) \
622 SymI_HasProto(isEmptyMVarzh_fast) \
623 SymI_HasProto(isFloatDenormalized) \
624 SymI_HasProto(isFloatInfinite) \
625 SymI_HasProto(isFloatNaN) \
626 SymI_HasProto(isFloatNegativeZero) \
627 SymI_HasProto(killThreadzh_fast) \
628 SymI_HasProto(loadObj) \
629 SymI_HasProto(insertStableSymbol) \
630 SymI_HasProto(insertSymbol) \
631 SymI_HasProto(lookupSymbol) \
632 SymI_HasProto(makeStablePtrzh_fast) \
633 SymI_HasProto(minusIntegerzh_fast) \
634 SymI_HasProto(mkApUpd0zh_fast) \
635 SymI_HasProto(myThreadIdzh_fast) \
636 SymI_HasProto(labelThreadzh_fast) \
637 SymI_HasProto(newArrayzh_fast) \
638 SymI_HasProto(newBCOzh_fast) \
639 SymI_HasProto(newByteArrayzh_fast) \
640 SymI_HasProto_redirect(newCAF, newDynCAF) \
641 SymI_HasProto(newMVarzh_fast) \
642 SymI_HasProto(newMutVarzh_fast) \
643 SymI_HasProto(newTVarzh_fast) \
644 SymI_HasProto(noDuplicatezh_fast) \
645 SymI_HasProto(atomicModifyMutVarzh_fast) \
646 SymI_HasProto(newPinnedByteArrayzh_fast) \
647 SymI_HasProto(newSpark) \
648 SymI_HasProto(orIntegerzh_fast) \
649 SymI_HasProto(performGC) \
650 SymI_HasProto(performMajorGC) \
651 SymI_HasProto(plusIntegerzh_fast) \
652 SymI_HasProto(prog_argc) \
653 SymI_HasProto(prog_argv) \
654 SymI_HasProto(putMVarzh_fast) \
655 SymI_HasProto(quotIntegerzh_fast) \
656 SymI_HasProto(quotRemIntegerzh_fast) \
657 SymI_HasProto(raisezh_fast) \
658 SymI_HasProto(raiseIOzh_fast) \
659 SymI_HasProto(readTVarzh_fast) \
660 SymI_HasProto(readTVarIOzh_fast) \
661 SymI_HasProto(remIntegerzh_fast) \
662 SymI_HasProto(resetNonBlockingFd) \
663 SymI_HasProto(resumeThread) \
664 SymI_HasProto(resolveObjs) \
665 SymI_HasProto(retryzh_fast) \
666 SymI_HasProto(rts_apply) \
667 SymI_HasProto(rts_checkSchedStatus) \
668 SymI_HasProto(rts_eval) \
669 SymI_HasProto(rts_evalIO) \
670 SymI_HasProto(rts_evalLazyIO) \
671 SymI_HasProto(rts_evalStableIO) \
672 SymI_HasProto(rts_eval_) \
673 SymI_HasProto(rts_getBool) \
674 SymI_HasProto(rts_getChar) \
675 SymI_HasProto(rts_getDouble) \
676 SymI_HasProto(rts_getFloat) \
677 SymI_HasProto(rts_getInt) \
678 SymI_HasProto(rts_getInt8) \
679 SymI_HasProto(rts_getInt16) \
680 SymI_HasProto(rts_getInt32) \
681 SymI_HasProto(rts_getInt64) \
682 SymI_HasProto(rts_getPtr) \
683 SymI_HasProto(rts_getFunPtr) \
684 SymI_HasProto(rts_getStablePtr) \
685 SymI_HasProto(rts_getThreadId) \
686 SymI_HasProto(rts_getWord) \
687 SymI_HasProto(rts_getWord8) \
688 SymI_HasProto(rts_getWord16) \
689 SymI_HasProto(rts_getWord32) \
690 SymI_HasProto(rts_getWord64) \
691 SymI_HasProto(rts_lock) \
692 SymI_HasProto(rts_mkBool) \
693 SymI_HasProto(rts_mkChar) \
694 SymI_HasProto(rts_mkDouble) \
695 SymI_HasProto(rts_mkFloat) \
696 SymI_HasProto(rts_mkInt) \
697 SymI_HasProto(rts_mkInt8) \
698 SymI_HasProto(rts_mkInt16) \
699 SymI_HasProto(rts_mkInt32) \
700 SymI_HasProto(rts_mkInt64) \
701 SymI_HasProto(rts_mkPtr) \
702 SymI_HasProto(rts_mkFunPtr) \
703 SymI_HasProto(rts_mkStablePtr) \
704 SymI_HasProto(rts_mkString) \
705 SymI_HasProto(rts_mkWord) \
706 SymI_HasProto(rts_mkWord8) \
707 SymI_HasProto(rts_mkWord16) \
708 SymI_HasProto(rts_mkWord32) \
709 SymI_HasProto(rts_mkWord64) \
710 SymI_HasProto(rts_unlock) \
711 SymI_HasProto(rtsSupportsBoundThreads) \
712 SymI_HasProto(__hscore_get_saved_termios) \
713 SymI_HasProto(__hscore_set_saved_termios) \
714 SymI_HasProto(setProgArgv) \
715 SymI_HasProto(startupHaskell) \
716 SymI_HasProto(shutdownHaskell) \
717 SymI_HasProto(shutdownHaskellAndExit) \
718 SymI_HasProto(stable_ptr_table) \
719 SymI_HasProto(stackOverflow) \
720 SymI_HasProto(stg_CAF_BLACKHOLE_info) \
721 SymI_HasProto(awakenBlockedQueue) \
722 SymI_HasProto(startTimer) \
723 SymI_HasProto(stg_CHARLIKE_closure) \
724 SymI_HasProto(stg_MVAR_CLEAN_info) \
725 SymI_HasProto(stg_MVAR_DIRTY_info) \
726 SymI_HasProto(stg_IND_STATIC_info) \
727 SymI_HasProto(stg_INTLIKE_closure) \
728 SymI_HasProto(stg_MUT_ARR_PTRS_DIRTY_info) \
729 SymI_HasProto(stg_MUT_ARR_PTRS_FROZEN_info) \
730 SymI_HasProto(stg_MUT_ARR_PTRS_FROZEN0_info) \
731 SymI_HasProto(stg_WEAK_info) \
732 SymI_HasProto(stg_ap_v_info) \
733 SymI_HasProto(stg_ap_f_info) \
734 SymI_HasProto(stg_ap_d_info) \
735 SymI_HasProto(stg_ap_l_info) \
736 SymI_HasProto(stg_ap_n_info) \
737 SymI_HasProto(stg_ap_p_info) \
738 SymI_HasProto(stg_ap_pv_info) \
739 SymI_HasProto(stg_ap_pp_info) \
740 SymI_HasProto(stg_ap_ppv_info) \
741 SymI_HasProto(stg_ap_ppp_info) \
742 SymI_HasProto(stg_ap_pppv_info) \
743 SymI_HasProto(stg_ap_pppp_info) \
744 SymI_HasProto(stg_ap_ppppp_info) \
745 SymI_HasProto(stg_ap_pppppp_info) \
746 SymI_HasProto(stg_ap_0_fast) \
747 SymI_HasProto(stg_ap_v_fast) \
748 SymI_HasProto(stg_ap_f_fast) \
749 SymI_HasProto(stg_ap_d_fast) \
750 SymI_HasProto(stg_ap_l_fast) \
751 SymI_HasProto(stg_ap_n_fast) \
752 SymI_HasProto(stg_ap_p_fast) \
753 SymI_HasProto(stg_ap_pv_fast) \
754 SymI_HasProto(stg_ap_pp_fast) \
755 SymI_HasProto(stg_ap_ppv_fast) \
756 SymI_HasProto(stg_ap_ppp_fast) \
757 SymI_HasProto(stg_ap_pppv_fast) \
758 SymI_HasProto(stg_ap_pppp_fast) \
759 SymI_HasProto(stg_ap_ppppp_fast) \
760 SymI_HasProto(stg_ap_pppppp_fast) \
761 SymI_HasProto(stg_ap_1_upd_info) \
762 SymI_HasProto(stg_ap_2_upd_info) \
763 SymI_HasProto(stg_ap_3_upd_info) \
764 SymI_HasProto(stg_ap_4_upd_info) \
765 SymI_HasProto(stg_ap_5_upd_info) \
766 SymI_HasProto(stg_ap_6_upd_info) \
767 SymI_HasProto(stg_ap_7_upd_info) \
768 SymI_HasProto(stg_exit) \
769 SymI_HasProto(stg_sel_0_upd_info) \
770 SymI_HasProto(stg_sel_10_upd_info) \
771 SymI_HasProto(stg_sel_11_upd_info) \
772 SymI_HasProto(stg_sel_12_upd_info) \
773 SymI_HasProto(stg_sel_13_upd_info) \
774 SymI_HasProto(stg_sel_14_upd_info) \
775 SymI_HasProto(stg_sel_15_upd_info) \
776 SymI_HasProto(stg_sel_1_upd_info) \
777 SymI_HasProto(stg_sel_2_upd_info) \
778 SymI_HasProto(stg_sel_3_upd_info) \
779 SymI_HasProto(stg_sel_4_upd_info) \
780 SymI_HasProto(stg_sel_5_upd_info) \
781 SymI_HasProto(stg_sel_6_upd_info) \
782 SymI_HasProto(stg_sel_7_upd_info) \
783 SymI_HasProto(stg_sel_8_upd_info) \
784 SymI_HasProto(stg_sel_9_upd_info) \
785 SymI_HasProto(stg_upd_frame_info) \
786 SymI_HasProto(suspendThread) \
787 SymI_HasProto(takeMVarzh_fast) \
788 SymI_HasProto(threadStatuszh_fast) \
789 SymI_HasProto(timesIntegerzh_fast) \
790 SymI_HasProto(tryPutMVarzh_fast) \
791 SymI_HasProto(tryTakeMVarzh_fast) \
792 SymI_HasProto(unblockAsyncExceptionszh_fast) \
793 SymI_HasProto(unloadObj) \
794 SymI_HasProto(unsafeThawArrayzh_fast) \
795 SymI_HasProto(waitReadzh_fast) \
796 SymI_HasProto(waitWritezh_fast) \
797 SymI_HasProto(word2Integerzh_fast) \
798 SymI_HasProto(writeTVarzh_fast) \
799 SymI_HasProto(xorIntegerzh_fast) \
800 SymI_HasProto(yieldzh_fast) \
801 SymI_NeedsProto(stg_interp_constr_entry) \
802 SymI_HasProto(allocateExec) \
803 SymI_HasProto(freeExec) \
804 SymI_HasProto(getAllocations) \
805 SymI_HasProto(revertCAFs) \
806 SymI_HasProto(RtsFlags) \
807 SymI_NeedsProto(rts_breakpoint_io_action) \
808 SymI_NeedsProto(rts_stop_next_breakpoint) \
809 SymI_NeedsProto(rts_stop_on_exception) \
810 SymI_HasProto(stopTimer) \
811 SymI_HasProto(n_capabilities) \
812 RTS_USER_SIGNALS_SYMBOLS
814 #ifdef SUPPORT_LONG_LONGS
815 #define RTS_LONG_LONG_SYMS \
816 SymI_HasProto(int64ToIntegerzh_fast) \
817 SymI_HasProto(word64ToIntegerzh_fast)
819 #define RTS_LONG_LONG_SYMS /* nothing */
822 // 64-bit support functions in libgcc.a
823 #if defined(__GNUC__) && SIZEOF_VOID_P <= 4
824 #define RTS_LIBGCC_SYMBOLS \
825 SymI_NeedsProto(__divdi3) \
826 SymI_NeedsProto(__udivdi3) \
827 SymI_NeedsProto(__moddi3) \
828 SymI_NeedsProto(__umoddi3) \
829 SymI_NeedsProto(__muldi3) \
830 SymI_NeedsProto(__ashldi3) \
831 SymI_NeedsProto(__ashrdi3) \
832 SymI_NeedsProto(__lshrdi3) \
833 SymI_NeedsProto(__eprintf)
834 #elif defined(ia64_HOST_ARCH)
835 #define RTS_LIBGCC_SYMBOLS \
836 SymI_NeedsProto(__divdi3) \
837 SymI_NeedsProto(__udivdi3) \
838 SymI_NeedsProto(__moddi3) \
839 SymI_NeedsProto(__umoddi3) \
840 SymI_NeedsProto(__divsf3) \
841 SymI_NeedsProto(__divdf3)
843 #define RTS_LIBGCC_SYMBOLS
846 #if defined(darwin_HOST_OS) && defined(powerpc_HOST_ARCH)
847 // Symbols that don't have a leading underscore
848 // on Mac OS X. They have to receive special treatment,
849 // see machoInitSymbolsWithoutUnderscore()
850 #define RTS_MACHO_NOUNDERLINE_SYMBOLS \
851 SymI_NeedsProto(saveFP) \
852 SymI_NeedsProto(restFP)
855 /* entirely bogus claims about types of these symbols */
856 #define SymI_NeedsProto(vvv) extern void vvv(void);
857 #if defined(__PIC__) && defined(mingw32_TARGET_OS)
858 #define SymE_HasProto(vvv) SymE_HasProto(vvv);
859 #define SymE_NeedsProto(vvv) extern void _imp__ ## vvv (void);
861 #define SymE_NeedsProto(vvv) SymI_NeedsProto(vvv);
862 #define SymE_HasProto(vvv) SymI_HasProto(vvv)
864 #define SymI_HasProto(vvv) /**/
865 #define SymI_HasProto_redirect(vvv,xxx) /**/
869 RTS_POSIX_ONLY_SYMBOLS
870 RTS_MINGW_ONLY_SYMBOLS
871 RTS_CYGWIN_ONLY_SYMBOLS
872 RTS_DARWIN_ONLY_SYMBOLS
875 #undef SymI_NeedsProto
877 #undef SymI_HasProto_redirect
879 #undef SymE_NeedsProto
881 #ifdef LEADING_UNDERSCORE
882 #define MAYBE_LEADING_UNDERSCORE_STR(s) ("_" s)
884 #define MAYBE_LEADING_UNDERSCORE_STR(s) (s)
887 #define SymI_HasProto(vvv) { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
889 #define SymE_HasProto(vvv) { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
890 (void*)DLL_IMPORT_DATA_REF(vvv) },
892 #define SymI_NeedsProto(vvv) SymI_HasProto(vvv)
893 #define SymE_NeedsProto(vvv) SymE_HasProto(vvv)
895 // SymI_HasProto_redirect allows us to redirect references to one symbol to
896 // another symbol. See newCAF/newDynCAF for an example.
897 #define SymI_HasProto_redirect(vvv,xxx) \
898 { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
901 static RtsSymbolVal rtsSyms[] = {
905 RTS_POSIX_ONLY_SYMBOLS
906 RTS_MINGW_ONLY_SYMBOLS
907 RTS_CYGWIN_ONLY_SYMBOLS
908 RTS_DARWIN_ONLY_SYMBOLS
911 #if defined(darwin_HOST_OS) && defined(i386_HOST_ARCH)
912 // dyld stub code contains references to this,
913 // but it should never be called because we treat
914 // lazy pointers as nonlazy.
915 { "dyld_stub_binding_helper", (void*)0xDEADBEEF },
917 { 0, 0 } /* sentinel */
922 /* -----------------------------------------------------------------------------
923 * Insert symbols into hash tables, checking for duplicates.
926 static void ghciInsertStrHashTable ( char* obj_name,
932 if (lookupHashTable(table, (StgWord)key) == NULL)
934 insertStrHashTable(table, (StgWord)key, data);
939 "GHCi runtime linker: fatal error: I found a duplicate definition for symbol\n"
941 "whilst processing object file\n"
943 "This could be caused by:\n"
944 " * Loading two different object files which export the same symbol\n"
945 " * Specifying the same object file twice on the GHCi command line\n"
946 " * An incorrect `package.conf' entry, causing some object to be\n"
948 "GHCi cannot safely continue in this situation. Exiting now. Sorry.\n"
955 /* -----------------------------------------------------------------------------
956 * initialize the object linker
960 static int linker_init_done = 0 ;
962 #if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
963 static void *dl_prog_handle;
971 /* Make initLinker idempotent, so we can call it
972 before evey relevant operation; that means we
973 don't need to initialise the linker separately */
974 if (linker_init_done == 1) { return; } else {
975 linker_init_done = 1;
978 stablehash = allocStrHashTable();
979 symhash = allocStrHashTable();
981 /* populate the symbol table with stuff from the RTS */
982 for (sym = rtsSyms; sym->lbl != NULL; sym++) {
983 ghciInsertStrHashTable("(GHCi built-in symbols)",
984 symhash, sym->lbl, sym->addr);
986 # if defined(OBJFORMAT_MACHO) && defined(powerpc_HOST_ARCH)
987 machoInitSymbolsWithoutUnderscore();
990 # if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
991 # if defined(RTLD_DEFAULT)
992 dl_prog_handle = RTLD_DEFAULT;
994 dl_prog_handle = dlopen(NULL, RTLD_LAZY);
995 # endif /* RTLD_DEFAULT */
999 /* -----------------------------------------------------------------------------
1000 * Loading DLL or .so dynamic libraries
1001 * -----------------------------------------------------------------------------
1003 * Add a DLL from which symbols may be found. In the ELF case, just
1004 * do RTLD_GLOBAL-style add, so no further messing around needs to
1005 * happen in order that symbols in the loaded .so are findable --
1006 * lookupSymbol() will subsequently see them by dlsym on the program's
1007 * dl-handle. Returns NULL if success, otherwise ptr to an err msg.
1009 * In the PEi386 case, open the DLLs and put handles to them in a
1010 * linked list. When looking for a symbol, try all handles in the
1011 * list. This means that we need to load even DLLs that are guaranteed
1012 * to be in the ghc.exe image already, just so we can get a handle
1013 * to give to loadSymbol, so that we can find the symbols. For such
1014 * libraries, the LoadLibrary call should be a no-op except for returning
1019 #if defined(OBJFORMAT_PEi386)
1020 /* A record for storing handles into DLLs. */
1025 struct _OpenedDLL* next;
1030 /* A list thereof. */
1031 static OpenedDLL* opened_dlls = NULL;
1035 addDLL( char *dll_name )
1037 # if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1038 /* ------------------- ELF DLL loader ------------------- */
1044 // omitted: RTLD_NOW
1045 // see http://www.haskell.org/pipermail/cvs-ghc/2007-September/038570.html
1046 hdl= dlopen(dll_name, RTLD_LAZY | RTLD_GLOBAL);
1049 /* dlopen failed; return a ptr to the error msg. */
1051 if (errmsg == NULL) errmsg = "addDLL: unknown error";
1058 # elif defined(OBJFORMAT_PEi386)
1059 /* ------------------- Win32 DLL loader ------------------- */
1067 /* debugBelch("\naddDLL; dll_name = `%s'\n", dll_name); */
1069 /* See if we've already got it, and ignore if so. */
1070 for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next) {
1071 if (0 == strcmp(o_dll->name, dll_name))
1075 /* The file name has no suffix (yet) so that we can try
1076 both foo.dll and foo.drv
1078 The documentation for LoadLibrary says:
1079 If no file name extension is specified in the lpFileName
1080 parameter, the default library extension .dll is
1081 appended. However, the file name string can include a trailing
1082 point character (.) to indicate that the module name has no
1085 buf = stgMallocBytes(strlen(dll_name) + 10, "addDLL");
1086 sprintf(buf, "%s.DLL", dll_name);
1087 instance = LoadLibrary(buf);
1088 if (instance == NULL) {
1089 if (GetLastError() != ERROR_MOD_NOT_FOUND) goto error;
1090 // KAA: allow loading of drivers (like winspool.drv)
1091 sprintf(buf, "%s.DRV", dll_name);
1092 instance = LoadLibrary(buf);
1093 if (instance == NULL) {
1094 if (GetLastError() != ERROR_MOD_NOT_FOUND) goto error;
1095 // #1883: allow loading of unix-style libfoo.dll DLLs
1096 sprintf(buf, "lib%s.DLL", dll_name);
1097 instance = LoadLibrary(buf);
1098 if (instance == NULL) {
1105 /* Add this DLL to the list of DLLs in which to search for symbols. */
1106 o_dll = stgMallocBytes( sizeof(OpenedDLL), "addDLL" );
1107 o_dll->name = stgMallocBytes(1+strlen(dll_name), "addDLL");
1108 strcpy(o_dll->name, dll_name);
1109 o_dll->instance = instance;
1110 o_dll->next = opened_dlls;
1111 opened_dlls = o_dll;
1117 sysErrorBelch(dll_name);
1119 /* LoadLibrary failed; return a ptr to the error msg. */
1120 return "addDLL: could not load DLL";
1123 barf("addDLL: not implemented on this platform");
1127 /* -----------------------------------------------------------------------------
1128 * insert a stable symbol in the hash table
1132 insertStableSymbol(char* obj_name, char* key, StgPtr p)
1134 ghciInsertStrHashTable(obj_name, stablehash, key, getStablePtr(p));
1138 /* -----------------------------------------------------------------------------
1139 * insert a symbol in the hash table
1142 insertSymbol(char* obj_name, char* key, void* data)
1144 ghciInsertStrHashTable(obj_name, symhash, key, data);
1147 /* -----------------------------------------------------------------------------
1148 * lookup a symbol in the hash table
1151 lookupSymbol( char *lbl )
1155 ASSERT(symhash != NULL);
1156 val = lookupStrHashTable(symhash, lbl);
1159 # if defined(OBJFORMAT_ELF)
1160 return dlsym(dl_prog_handle, lbl);
1161 # elif defined(OBJFORMAT_MACHO)
1163 /* On OS X 10.3 and later, we use dlsym instead of the old legacy
1166 HACK: On OS X, global symbols are prefixed with an underscore.
1167 However, dlsym wants us to omit the leading underscore from the
1168 symbol name. For now, we simply strip it off here (and ONLY
1171 ASSERT(lbl[0] == '_');
1172 return dlsym(dl_prog_handle, lbl+1);
1174 if(NSIsSymbolNameDefined(lbl)) {
1175 NSSymbol symbol = NSLookupAndBindSymbol(lbl);
1176 return NSAddressOfSymbol(symbol);
1180 # endif /* HAVE_DLFCN_H */
1181 # elif defined(OBJFORMAT_PEi386)
1184 sym = lookupSymbolInDLLs(lbl);
1185 if (sym != NULL) { return sym; };
1187 // Also try looking up the symbol without the @N suffix. Some
1188 // DLLs have the suffixes on their symbols, some don't.
1189 zapTrailingAtSign ( lbl );
1190 sym = lookupSymbolInDLLs(lbl);
1191 if (sym != NULL) { return sym; };
1203 /* -----------------------------------------------------------------------------
1204 * Debugging aid: look in GHCi's object symbol tables for symbols
1205 * within DELTA bytes of the specified address, and show their names.
1208 void ghci_enquire ( char* addr );
1210 void ghci_enquire ( char* addr )
1215 const int DELTA = 64;
1220 for (oc = objects; oc; oc = oc->next) {
1221 for (i = 0; i < oc->n_symbols; i++) {
1222 sym = oc->symbols[i];
1223 if (sym == NULL) continue;
1226 a = lookupStrHashTable(symhash, sym);
1229 // debugBelch("ghci_enquire: can't find %s\n", sym);
1231 else if (addr-DELTA <= a && a <= addr+DELTA) {
1232 debugBelch("%p + %3d == `%s'\n", addr, (int)(a - addr), sym);
1239 #ifdef ia64_HOST_ARCH
1240 static unsigned int PLTSize(void);
1243 /* -----------------------------------------------------------------------------
1244 * Load an obj (populate the global symbol table, but don't resolve yet)
1246 * Returns: 1 if ok, 0 on error.
1249 loadObj( char *path )
1256 void *map_addr = NULL;
1262 /* debugBelch("loadObj %s\n", path ); */
1264 /* Check that we haven't already loaded this object.
1265 Ignore requests to load multiple times */
1269 for (o = objects; o; o = o->next) {
1270 if (0 == strcmp(o->fileName, path)) {
1272 break; /* don't need to search further */
1276 IF_DEBUG(linker, debugBelch(
1277 "GHCi runtime linker: warning: looks like you're trying to load the\n"
1278 "same object file twice:\n"
1280 "GHCi will ignore this, but be warned.\n"
1282 return 1; /* success */
1286 oc = stgMallocBytes(sizeof(ObjectCode), "loadObj(oc)");
1288 # if defined(OBJFORMAT_ELF)
1289 oc->formatName = "ELF";
1290 # elif defined(OBJFORMAT_PEi386)
1291 oc->formatName = "PEi386";
1292 # elif defined(OBJFORMAT_MACHO)
1293 oc->formatName = "Mach-O";
1296 barf("loadObj: not implemented on this platform");
1299 r = stat(path, &st);
1300 if (r == -1) { return 0; }
1302 /* sigh, strdup() isn't a POSIX function, so do it the long way */
1303 oc->fileName = stgMallocBytes( strlen(path)+1, "loadObj" );
1304 strcpy(oc->fileName, path);
1306 oc->fileSize = st.st_size;
1308 oc->sections = NULL;
1309 oc->proddables = NULL;
1311 /* chain it onto the list of objects */
1316 #define ROUND_UP(x,size) ((x + size - 1) & ~(size - 1))
1318 /* On many architectures malloc'd memory isn't executable, so we need to use mmap. */
1320 #if defined(openbsd_HOST_OS)
1321 fd = open(path, O_RDONLY, S_IRUSR);
1323 fd = open(path, O_RDONLY);
1326 barf("loadObj: can't open `%s'", path);
1328 pagesize = getpagesize();
1330 #ifdef ia64_HOST_ARCH
1331 /* The PLT needs to be right before the object */
1332 n = ROUND_UP(PLTSize(), pagesize);
1333 oc->plt = mmap(NULL, n, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
1334 if (oc->plt == MAP_FAILED)
1335 barf("loadObj: can't allocate PLT");
1338 map_addr = oc->plt + n;
1341 n = ROUND_UP(oc->fileSize, pagesize);
1343 /* Link objects into the lower 2Gb on x86_64. GHC assumes the
1344 * small memory model on this architecture (see gcc docs,
1347 * MAP_32BIT not available on OpenBSD/amd64
1349 #if defined(x86_64_HOST_ARCH) && defined(MAP_32BIT)
1350 #define EXTRA_MAP_FLAGS MAP_32BIT
1352 #define EXTRA_MAP_FLAGS 0
1355 /* MAP_ANONYMOUS is MAP_ANON on some systems, e.g. OpenBSD */
1356 #if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
1357 #define MAP_ANONYMOUS MAP_ANON
1360 oc->image = mmap(map_addr, n, PROT_EXEC|PROT_READ|PROT_WRITE,
1361 MAP_PRIVATE|EXTRA_MAP_FLAGS, fd, 0);
1362 if (oc->image == MAP_FAILED)
1363 barf("loadObj: can't map `%s'", path);
1367 #else /* !USE_MMAP */
1369 /* load the image into memory */
1370 f = fopen(path, "rb");
1372 barf("loadObj: can't read `%s'", path);
1374 # if defined(mingw32_HOST_OS)
1375 // TODO: We would like to use allocateExec here, but allocateExec
1376 // cannot currently allocate blocks large enough.
1377 oc->image = VirtualAlloc(NULL, oc->fileSize, MEM_RESERVE | MEM_COMMIT,
1378 PAGE_EXECUTE_READWRITE);
1379 # elif defined(darwin_HOST_OS)
1380 // In a Mach-O .o file, all sections can and will be misaligned
1381 // if the total size of the headers is not a multiple of the
1382 // desired alignment. This is fine for .o files that only serve
1383 // as input for the static linker, but it's not fine for us,
1384 // as SSE (used by gcc for floating point) and Altivec require
1385 // 16-byte alignment.
1386 // We calculate the correct alignment from the header before
1387 // reading the file, and then we misalign oc->image on purpose so
1388 // that the actual sections end up aligned again.
1389 oc->misalignment = machoGetMisalignment(f);
1390 oc->image = stgMallocBytes(oc->fileSize + oc->misalignment, "loadObj(image)");
1391 oc->image += oc->misalignment;
1393 oc->image = stgMallocBytes(oc->fileSize, "loadObj(image)");
1396 n = fread ( oc->image, 1, oc->fileSize, f );
1397 if (n != oc->fileSize)
1398 barf("loadObj: error whilst reading `%s'", path);
1401 #endif /* USE_MMAP */
1403 # if defined(OBJFORMAT_MACHO) && (defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH))
1404 r = ocAllocateSymbolExtras_MachO ( oc );
1405 if (!r) { return r; }
1406 # elif defined(OBJFORMAT_ELF) && (defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH))
1407 r = ocAllocateSymbolExtras_ELF ( oc );
1408 if (!r) { return r; }
1411 /* verify the in-memory image */
1412 # if defined(OBJFORMAT_ELF)
1413 r = ocVerifyImage_ELF ( oc );
1414 # elif defined(OBJFORMAT_PEi386)
1415 r = ocVerifyImage_PEi386 ( oc );
1416 # elif defined(OBJFORMAT_MACHO)
1417 r = ocVerifyImage_MachO ( oc );
1419 barf("loadObj: no verify method");
1421 if (!r) { return r; }
1423 /* build the symbol list for this image */
1424 # if defined(OBJFORMAT_ELF)
1425 r = ocGetNames_ELF ( oc );
1426 # elif defined(OBJFORMAT_PEi386)
1427 r = ocGetNames_PEi386 ( oc );
1428 # elif defined(OBJFORMAT_MACHO)
1429 r = ocGetNames_MachO ( oc );
1431 barf("loadObj: no getNames method");
1433 if (!r) { return r; }
1435 /* loaded, but not resolved yet */
1436 oc->status = OBJECT_LOADED;
1441 /* -----------------------------------------------------------------------------
1442 * resolve all the currently unlinked objects in memory
1444 * Returns: 1 if ok, 0 on error.
1454 for (oc = objects; oc; oc = oc->next) {
1455 if (oc->status != OBJECT_RESOLVED) {
1456 # if defined(OBJFORMAT_ELF)
1457 r = ocResolve_ELF ( oc );
1458 # elif defined(OBJFORMAT_PEi386)
1459 r = ocResolve_PEi386 ( oc );
1460 # elif defined(OBJFORMAT_MACHO)
1461 r = ocResolve_MachO ( oc );
1463 barf("resolveObjs: not implemented on this platform");
1465 if (!r) { return r; }
1466 oc->status = OBJECT_RESOLVED;
1472 /* -----------------------------------------------------------------------------
1473 * delete an object from the pool
1476 unloadObj( char *path )
1478 ObjectCode *oc, *prev;
1480 ASSERT(symhash != NULL);
1481 ASSERT(objects != NULL);
1486 for (oc = objects; oc; prev = oc, oc = oc->next) {
1487 if (!strcmp(oc->fileName,path)) {
1489 /* Remove all the mappings for the symbols within this
1494 for (i = 0; i < oc->n_symbols; i++) {
1495 if (oc->symbols[i] != NULL) {
1496 removeStrHashTable(symhash, oc->symbols[i], NULL);
1504 prev->next = oc->next;
1507 // We're going to leave this in place, in case there are
1508 // any pointers from the heap into it:
1509 // #ifdef mingw32_HOST_OS
1510 // VirtualFree(oc->image);
1512 // stgFree(oc->image);
1514 stgFree(oc->fileName);
1515 stgFree(oc->symbols);
1516 stgFree(oc->sections);
1522 errorBelch("unloadObj: can't find `%s' to unload", path);
1526 /* -----------------------------------------------------------------------------
1527 * Sanity checking. For each ObjectCode, maintain a list of address ranges
1528 * which may be prodded during relocation, and abort if we try and write
1529 * outside any of these.
1531 static void addProddableBlock ( ObjectCode* oc, void* start, int size )
1534 = stgMallocBytes(sizeof(ProddableBlock), "addProddableBlock");
1535 /* debugBelch("aPB %p %p %d\n", oc, start, size); */
1539 pb->next = oc->proddables;
1540 oc->proddables = pb;
1543 static void checkProddableBlock ( ObjectCode* oc, void* addr )
1546 for (pb = oc->proddables; pb != NULL; pb = pb->next) {
1547 char* s = (char*)(pb->start);
1548 char* e = s + pb->size - 1;
1549 char* a = (char*)addr;
1550 /* Assumes that the biggest fixup involves a 4-byte write. This
1551 probably needs to be changed to 8 (ie, +7) on 64-bit
1553 if (a >= s && (a+3) <= e) return;
1555 barf("checkProddableBlock: invalid fixup in runtime linker");
1558 /* -----------------------------------------------------------------------------
1559 * Section management.
1561 static void addSection ( ObjectCode* oc, SectionKind kind,
1562 void* start, void* end )
1564 Section* s = stgMallocBytes(sizeof(Section), "addSection");
1568 s->next = oc->sections;
1571 debugBelch("addSection: %p-%p (size %d), kind %d\n",
1572 start, ((char*)end)-1, end - start + 1, kind );
1577 /* --------------------------------------------------------------------------
1579 * This is about allocating a small chunk of memory for every symbol in the
1580 * object file. We make sure that the SymboLExtras are always "in range" of
1581 * limited-range PC-relative instructions on various platforms by allocating
1582 * them right next to the object code itself.
1585 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
1588 ocAllocateSymbolExtras
1590 Allocate additional space at the end of the object file image to make room
1591 for jump islands (powerpc, x86_64) and GOT entries (x86_64).
1593 PowerPC relative branch instructions have a 24 bit displacement field.
1594 As PPC code is always 4-byte-aligned, this yields a +-32MB range.
1595 If a particular imported symbol is outside this range, we have to redirect
1596 the jump to a short piece of new code that just loads the 32bit absolute
1597 address and jumps there.
1598 On x86_64, PC-relative jumps and PC-relative accesses to the GOT are limited
1601 This function just allocates space for one SymbolExtra for every
1602 undefined symbol in the object file. The code for the jump islands is
1603 filled in by makeSymbolExtra below.
1606 static int ocAllocateSymbolExtras( ObjectCode* oc, int count, int first )
1613 int misalignment = 0;
1614 #ifdef darwin_HOST_OS
1615 misalignment = oc->misalignment;
1621 // round up to the nearest 4
1622 aligned = (oc->fileSize + 3) & ~3;
1625 pagesize = getpagesize();
1626 n = ROUND_UP( oc->fileSize, pagesize );
1627 m = ROUND_UP( aligned + sizeof (SymbolExtra) * count, pagesize );
1629 /* we try to use spare space at the end of the last page of the
1630 * image for the jump islands, but if there isn't enough space
1631 * then we have to map some (anonymously, remembering MAP_32BIT).
1633 if( m > n ) // we need to allocate more pages
1635 oc->symbol_extras = mmap (NULL, sizeof(SymbolExtra) * count,
1636 PROT_EXEC|PROT_READ|PROT_WRITE,
1637 MAP_PRIVATE|MAP_ANONYMOUS|EXTRA_MAP_FLAGS,
1639 if (oc->symbol_extras == MAP_FAILED)
1641 errorBelch( "Unable to mmap() for jump islands\n" );
1644 #ifdef x86_64_HOST_ARCH
1645 if ((StgWord)oc->symbol_extras > 0x80000000)
1647 barf("mmap() returned memory outside 2Gb");
1653 oc->symbol_extras = (SymbolExtra *) (oc->image + aligned);
1656 oc->image -= misalignment;
1657 oc->image = stgReallocBytes( oc->image,
1659 aligned + sizeof (SymbolExtra) * count,
1660 "ocAllocateSymbolExtras" );
1661 oc->image += misalignment;
1663 oc->symbol_extras = (SymbolExtra *) (oc->image + aligned);
1664 #endif /* USE_MMAP */
1666 memset( oc->symbol_extras, 0, sizeof (SymbolExtra) * count );
1669 oc->symbol_extras = NULL;
1671 oc->first_symbol_extra = first;
1672 oc->n_symbol_extras = count;
1677 static SymbolExtra* makeSymbolExtra( ObjectCode* oc,
1678 unsigned long symbolNumber,
1679 unsigned long target )
1683 ASSERT( symbolNumber >= oc->first_symbol_extra
1684 && symbolNumber - oc->first_symbol_extra < oc->n_symbol_extras);
1686 extra = &oc->symbol_extras[symbolNumber - oc->first_symbol_extra];
1688 #ifdef powerpc_HOST_ARCH
1689 // lis r12, hi16(target)
1690 extra->jumpIsland.lis_r12 = 0x3d80;
1691 extra->jumpIsland.hi_addr = target >> 16;
1693 // ori r12, r12, lo16(target)
1694 extra->jumpIsland.ori_r12_r12 = 0x618c;
1695 extra->jumpIsland.lo_addr = target & 0xffff;
1698 extra->jumpIsland.mtctr_r12 = 0x7d8903a6;
1701 extra->jumpIsland.bctr = 0x4e800420;
1703 #ifdef x86_64_HOST_ARCH
1705 static uint8_t jmp[] = { 0xFF, 0x25, 0xF2, 0xFF, 0xFF, 0xFF };
1706 extra->addr = target;
1707 memcpy(extra->jumpIsland, jmp, 6);
1715 /* --------------------------------------------------------------------------
1716 * PowerPC specifics (instruction cache flushing)
1717 * ------------------------------------------------------------------------*/
1719 #ifdef powerpc_TARGET_ARCH
1721 ocFlushInstructionCache
1723 Flush the data & instruction caches.
1724 Because the PPC has split data/instruction caches, we have to
1725 do that whenever we modify code at runtime.
1728 static void ocFlushInstructionCache( ObjectCode *oc )
1730 int n = (oc->fileSize + sizeof( SymbolExtra ) * oc->n_symbol_extras + 3) / 4;
1731 unsigned long *p = (unsigned long *) oc->image;
1735 __asm__ volatile ( "dcbf 0,%0\n\t"
1743 __asm__ volatile ( "sync\n\t"
1749 /* --------------------------------------------------------------------------
1750 * PEi386 specifics (Win32 targets)
1751 * ------------------------------------------------------------------------*/
1753 /* The information for this linker comes from
1754 Microsoft Portable Executable
1755 and Common Object File Format Specification
1756 revision 5.1 January 1998
1757 which SimonM says comes from the MS Developer Network CDs.
1759 It can be found there (on older CDs), but can also be found
1762 http://www.microsoft.com/hwdev/hardware/PECOFF.asp
1764 (this is Rev 6.0 from February 1999).
1766 Things move, so if that fails, try searching for it via
1768 http://www.google.com/search?q=PE+COFF+specification
1770 The ultimate reference for the PE format is the Winnt.h
1771 header file that comes with the Platform SDKs; as always,
1772 implementations will drift wrt their documentation.
1774 A good background article on the PE format is Matt Pietrek's
1775 March 1994 article in Microsoft System Journal (MSJ)
1776 (Vol.9, No. 3): "Peering Inside the PE: A Tour of the
1777 Win32 Portable Executable File Format." The info in there
1778 has recently been updated in a two part article in
1779 MSDN magazine, issues Feb and March 2002,
1780 "Inside Windows: An In-Depth Look into the Win32 Portable
1781 Executable File Format"
1783 John Levine's book "Linkers and Loaders" contains useful
1788 #if defined(OBJFORMAT_PEi386)
1792 typedef unsigned char UChar;
1793 typedef unsigned short UInt16;
1794 typedef unsigned int UInt32;
1801 UInt16 NumberOfSections;
1802 UInt32 TimeDateStamp;
1803 UInt32 PointerToSymbolTable;
1804 UInt32 NumberOfSymbols;
1805 UInt16 SizeOfOptionalHeader;
1806 UInt16 Characteristics;
1810 #define sizeof_COFF_header 20
1817 UInt32 VirtualAddress;
1818 UInt32 SizeOfRawData;
1819 UInt32 PointerToRawData;
1820 UInt32 PointerToRelocations;
1821 UInt32 PointerToLinenumbers;
1822 UInt16 NumberOfRelocations;
1823 UInt16 NumberOfLineNumbers;
1824 UInt32 Characteristics;
1828 #define sizeof_COFF_section 40
1835 UInt16 SectionNumber;
1838 UChar NumberOfAuxSymbols;
1842 #define sizeof_COFF_symbol 18
1847 UInt32 VirtualAddress;
1848 UInt32 SymbolTableIndex;
1853 #define sizeof_COFF_reloc 10
1856 /* From PE spec doc, section 3.3.2 */
1857 /* Note use of MYIMAGE_* since IMAGE_* are already defined in
1858 windows.h -- for the same purpose, but I want to know what I'm
1860 #define MYIMAGE_FILE_RELOCS_STRIPPED 0x0001
1861 #define MYIMAGE_FILE_EXECUTABLE_IMAGE 0x0002
1862 #define MYIMAGE_FILE_DLL 0x2000
1863 #define MYIMAGE_FILE_SYSTEM 0x1000
1864 #define MYIMAGE_FILE_BYTES_REVERSED_HI 0x8000
1865 #define MYIMAGE_FILE_BYTES_REVERSED_LO 0x0080
1866 #define MYIMAGE_FILE_32BIT_MACHINE 0x0100
1868 /* From PE spec doc, section 5.4.2 and 5.4.4 */
1869 #define MYIMAGE_SYM_CLASS_EXTERNAL 2
1870 #define MYIMAGE_SYM_CLASS_STATIC 3
1871 #define MYIMAGE_SYM_UNDEFINED 0
1873 /* From PE spec doc, section 4.1 */
1874 #define MYIMAGE_SCN_CNT_CODE 0x00000020
1875 #define MYIMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040
1876 #define MYIMAGE_SCN_LNK_NRELOC_OVFL 0x01000000
1878 /* From PE spec doc, section 5.2.1 */
1879 #define MYIMAGE_REL_I386_DIR32 0x0006
1880 #define MYIMAGE_REL_I386_REL32 0x0014
1883 /* We use myindex to calculate array addresses, rather than
1884 simply doing the normal subscript thing. That's because
1885 some of the above structs have sizes which are not
1886 a whole number of words. GCC rounds their sizes up to a
1887 whole number of words, which means that the address calcs
1888 arising from using normal C indexing or pointer arithmetic
1889 are just plain wrong. Sigh.
1892 myindex ( int scale, void* base, int index )
1895 ((UChar*)base) + scale * index;
1900 printName ( UChar* name, UChar* strtab )
1902 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
1903 UInt32 strtab_offset = * (UInt32*)(name+4);
1904 debugBelch("%s", strtab + strtab_offset );
1907 for (i = 0; i < 8; i++) {
1908 if (name[i] == 0) break;
1909 debugBelch("%c", name[i] );
1916 copyName ( UChar* name, UChar* strtab, UChar* dst, int dstSize )
1918 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
1919 UInt32 strtab_offset = * (UInt32*)(name+4);
1920 strncpy ( dst, strtab+strtab_offset, dstSize );
1926 if (name[i] == 0) break;
1936 cstring_from_COFF_symbol_name ( UChar* name, UChar* strtab )
1939 /* If the string is longer than 8 bytes, look in the
1940 string table for it -- this will be correctly zero terminated.
1942 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
1943 UInt32 strtab_offset = * (UInt32*)(name+4);
1944 return ((UChar*)strtab) + strtab_offset;
1946 /* Otherwise, if shorter than 8 bytes, return the original,
1947 which by defn is correctly terminated.
1949 if (name[7]==0) return name;
1950 /* The annoying case: 8 bytes. Copy into a temporary
1951 (which is never freed ...)
1953 newstr = stgMallocBytes(9, "cstring_from_COFF_symbol_name");
1955 strncpy(newstr,name,8);
1961 /* Just compares the short names (first 8 chars) */
1962 static COFF_section *
1963 findPEi386SectionCalled ( ObjectCode* oc, char* name )
1967 = (COFF_header*)(oc->image);
1968 COFF_section* sectab
1970 ((UChar*)(oc->image))
1971 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
1973 for (i = 0; i < hdr->NumberOfSections; i++) {
1976 COFF_section* section_i
1978 myindex ( sizeof_COFF_section, sectab, i );
1979 n1 = (UChar*) &(section_i->Name);
1981 if (n1[0]==n2[0] && n1[1]==n2[1] && n1[2]==n2[2] &&
1982 n1[3]==n2[3] && n1[4]==n2[4] && n1[5]==n2[5] &&
1983 n1[6]==n2[6] && n1[7]==n2[7])
1992 zapTrailingAtSign ( UChar* sym )
1994 # define my_isdigit(c) ((c) >= '0' && (c) <= '9')
1996 if (sym[0] == 0) return;
1998 while (sym[i] != 0) i++;
2001 while (j > 0 && my_isdigit(sym[j])) j--;
2002 if (j > 0 && sym[j] == '@' && j != i) sym[j] = 0;
2007 lookupSymbolInDLLs ( UChar *lbl )
2012 for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next) {
2013 /* debugBelch("look in %s for %s\n", o_dll->name, lbl); */
2015 if (lbl[0] == '_') {
2016 /* HACK: if the name has an initial underscore, try stripping
2017 it off & look that up first. I've yet to verify whether there's
2018 a Rule that governs whether an initial '_' *should always* be
2019 stripped off when mapping from import lib name to the DLL name.
2021 sym = GetProcAddress(o_dll->instance, (lbl+1));
2023 /*debugBelch("found %s in %s\n", lbl+1,o_dll->name);*/
2027 sym = GetProcAddress(o_dll->instance, lbl);
2029 /*debugBelch("found %s in %s\n", lbl,o_dll->name);*/
2038 ocVerifyImage_PEi386 ( ObjectCode* oc )
2043 COFF_section* sectab;
2044 COFF_symbol* symtab;
2046 /* debugBelch("\nLOADING %s\n", oc->fileName); */
2047 hdr = (COFF_header*)(oc->image);
2048 sectab = (COFF_section*) (
2049 ((UChar*)(oc->image))
2050 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2052 symtab = (COFF_symbol*) (
2053 ((UChar*)(oc->image))
2054 + hdr->PointerToSymbolTable
2056 strtab = ((UChar*)symtab)
2057 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2059 if (hdr->Machine != 0x14c) {
2060 errorBelch("%s: Not x86 PEi386", oc->fileName);
2063 if (hdr->SizeOfOptionalHeader != 0) {
2064 errorBelch("%s: PEi386 with nonempty optional header", oc->fileName);
2067 if ( /* (hdr->Characteristics & MYIMAGE_FILE_RELOCS_STRIPPED) || */
2068 (hdr->Characteristics & MYIMAGE_FILE_EXECUTABLE_IMAGE) ||
2069 (hdr->Characteristics & MYIMAGE_FILE_DLL) ||
2070 (hdr->Characteristics & MYIMAGE_FILE_SYSTEM) ) {
2071 errorBelch("%s: Not a PEi386 object file", oc->fileName);
2074 if ( (hdr->Characteristics & MYIMAGE_FILE_BYTES_REVERSED_HI)
2075 /* || !(hdr->Characteristics & MYIMAGE_FILE_32BIT_MACHINE) */ ) {
2076 errorBelch("%s: Invalid PEi386 word size or endiannness: %d",
2078 (int)(hdr->Characteristics));
2081 /* If the string table size is way crazy, this might indicate that
2082 there are more than 64k relocations, despite claims to the
2083 contrary. Hence this test. */
2084 /* debugBelch("strtab size %d\n", * (UInt32*)strtab); */
2086 if ( (*(UInt32*)strtab) > 600000 ) {
2087 /* Note that 600k has no special significance other than being
2088 big enough to handle the almost-2MB-sized lumps that
2089 constitute HSwin32*.o. */
2090 debugBelch("PEi386 object has suspiciously large string table; > 64k relocs?");
2095 /* No further verification after this point; only debug printing. */
2097 IF_DEBUG(linker, i=1);
2098 if (i == 0) return 1;
2100 debugBelch( "sectab offset = %d\n", ((UChar*)sectab) - ((UChar*)hdr) );
2101 debugBelch( "symtab offset = %d\n", ((UChar*)symtab) - ((UChar*)hdr) );
2102 debugBelch( "strtab offset = %d\n", ((UChar*)strtab) - ((UChar*)hdr) );
2105 debugBelch( "Machine: 0x%x\n", (UInt32)(hdr->Machine) );
2106 debugBelch( "# sections: %d\n", (UInt32)(hdr->NumberOfSections) );
2107 debugBelch( "time/date: 0x%x\n", (UInt32)(hdr->TimeDateStamp) );
2108 debugBelch( "symtab offset: %d\n", (UInt32)(hdr->PointerToSymbolTable) );
2109 debugBelch( "# symbols: %d\n", (UInt32)(hdr->NumberOfSymbols) );
2110 debugBelch( "sz of opt hdr: %d\n", (UInt32)(hdr->SizeOfOptionalHeader) );
2111 debugBelch( "characteristics: 0x%x\n", (UInt32)(hdr->Characteristics) );
2113 /* Print the section table. */
2115 for (i = 0; i < hdr->NumberOfSections; i++) {
2117 COFF_section* sectab_i
2119 myindex ( sizeof_COFF_section, sectab, i );
2126 printName ( sectab_i->Name, strtab );
2136 sectab_i->VirtualSize,
2137 sectab_i->VirtualAddress,
2138 sectab_i->SizeOfRawData,
2139 sectab_i->PointerToRawData,
2140 sectab_i->NumberOfRelocations,
2141 sectab_i->PointerToRelocations,
2142 sectab_i->PointerToRawData
2144 reltab = (COFF_reloc*) (
2145 ((UChar*)(oc->image)) + sectab_i->PointerToRelocations
2148 if ( sectab_i->Characteristics & MYIMAGE_SCN_LNK_NRELOC_OVFL ) {
2149 /* If the relocation field (a short) has overflowed, the
2150 * real count can be found in the first reloc entry.
2152 * See Section 4.1 (last para) of the PE spec (rev6.0).
2154 COFF_reloc* rel = (COFF_reloc*)
2155 myindex ( sizeof_COFF_reloc, reltab, 0 );
2156 noRelocs = rel->VirtualAddress;
2159 noRelocs = sectab_i->NumberOfRelocations;
2163 for (; j < noRelocs; j++) {
2165 COFF_reloc* rel = (COFF_reloc*)
2166 myindex ( sizeof_COFF_reloc, reltab, j );
2168 " type 0x%-4x vaddr 0x%-8x name `",
2170 rel->VirtualAddress );
2171 sym = (COFF_symbol*)
2172 myindex ( sizeof_COFF_symbol, symtab, rel->SymbolTableIndex );
2173 /* Hmm..mysterious looking offset - what's it for? SOF */
2174 printName ( sym->Name, strtab -10 );
2181 debugBelch("string table has size 0x%x\n", * (UInt32*)strtab );
2182 debugBelch("---START of string table---\n");
2183 for (i = 4; i < *(Int32*)strtab; i++) {
2185 debugBelch("\n"); else
2186 debugBelch("%c", strtab[i] );
2188 debugBelch("--- END of string table---\n");
2193 COFF_symbol* symtab_i;
2194 if (i >= (Int32)(hdr->NumberOfSymbols)) break;
2195 symtab_i = (COFF_symbol*)
2196 myindex ( sizeof_COFF_symbol, symtab, i );
2202 printName ( symtab_i->Name, strtab );
2211 (Int32)(symtab_i->SectionNumber),
2212 (UInt32)symtab_i->Type,
2213 (UInt32)symtab_i->StorageClass,
2214 (UInt32)symtab_i->NumberOfAuxSymbols
2216 i += symtab_i->NumberOfAuxSymbols;
2226 ocGetNames_PEi386 ( ObjectCode* oc )
2229 COFF_section* sectab;
2230 COFF_symbol* symtab;
2237 hdr = (COFF_header*)(oc->image);
2238 sectab = (COFF_section*) (
2239 ((UChar*)(oc->image))
2240 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2242 symtab = (COFF_symbol*) (
2243 ((UChar*)(oc->image))
2244 + hdr->PointerToSymbolTable
2246 strtab = ((UChar*)(oc->image))
2247 + hdr->PointerToSymbolTable
2248 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2250 /* Allocate space for any (local, anonymous) .bss sections. */
2252 for (i = 0; i < hdr->NumberOfSections; i++) {
2255 COFF_section* sectab_i
2257 myindex ( sizeof_COFF_section, sectab, i );
2258 if (0 != strcmp(sectab_i->Name, ".bss")) continue;
2259 /* sof 10/05: the PE spec text isn't too clear regarding what
2260 * the SizeOfRawData field is supposed to hold for object
2261 * file sections containing just uninitialized data -- for executables,
2262 * it is supposed to be zero; unclear what it's supposed to be
2263 * for object files. However, VirtualSize is guaranteed to be
2264 * zero for object files, which definitely suggests that SizeOfRawData
2265 * will be non-zero (where else would the size of this .bss section be
2266 * stored?) Looking at the COFF_section info for incoming object files,
2267 * this certainly appears to be the case.
2269 * => I suspect we've been incorrectly handling .bss sections in (relocatable)
2270 * object files up until now. This turned out to bite us with ghc-6.4.1's use
2271 * of gcc-3.4.x, which has started to emit initially-zeroed-out local 'static'
2272 * variable decls into to the .bss section. (The specific function in Q which
2273 * triggered this is libraries/base/cbits/dirUtils.c:__hscore_getFolderPath())
2275 if (sectab_i->VirtualSize == 0 && sectab_i->SizeOfRawData == 0) continue;
2276 /* This is a non-empty .bss section. Allocate zeroed space for
2277 it, and set its PointerToRawData field such that oc->image +
2278 PointerToRawData == addr_of_zeroed_space. */
2279 bss_sz = sectab_i->VirtualSize;
2280 if ( bss_sz < sectab_i->SizeOfRawData) { bss_sz = sectab_i->SizeOfRawData; }
2281 zspace = stgCallocBytes(1, bss_sz, "ocGetNames_PEi386(anonymous bss)");
2282 sectab_i->PointerToRawData = ((UChar*)zspace) - ((UChar*)(oc->image));
2283 addProddableBlock(oc, zspace, bss_sz);
2284 /* debugBelch("BSS anon section at 0x%x\n", zspace); */
2287 /* Copy section information into the ObjectCode. */
2289 for (i = 0; i < hdr->NumberOfSections; i++) {
2295 = SECTIONKIND_OTHER;
2296 COFF_section* sectab_i
2298 myindex ( sizeof_COFF_section, sectab, i );
2299 IF_DEBUG(linker, debugBelch("section name = %s\n", sectab_i->Name ));
2302 /* I'm sure this is the Right Way to do it. However, the
2303 alternative of testing the sectab_i->Name field seems to
2304 work ok with Cygwin.
2306 if (sectab_i->Characteristics & MYIMAGE_SCN_CNT_CODE ||
2307 sectab_i->Characteristics & MYIMAGE_SCN_CNT_INITIALIZED_DATA)
2308 kind = SECTIONKIND_CODE_OR_RODATA;
2311 if (0==strcmp(".text",sectab_i->Name) ||
2312 0==strcmp(".rdata",sectab_i->Name)||
2313 0==strcmp(".rodata",sectab_i->Name))
2314 kind = SECTIONKIND_CODE_OR_RODATA;
2315 if (0==strcmp(".data",sectab_i->Name) ||
2316 0==strcmp(".bss",sectab_i->Name))
2317 kind = SECTIONKIND_RWDATA;
2319 ASSERT(sectab_i->SizeOfRawData == 0 || sectab_i->VirtualSize == 0);
2320 sz = sectab_i->SizeOfRawData;
2321 if (sz < sectab_i->VirtualSize) sz = sectab_i->VirtualSize;
2323 start = ((UChar*)(oc->image)) + sectab_i->PointerToRawData;
2324 end = start + sz - 1;
2326 if (kind == SECTIONKIND_OTHER
2327 /* Ignore sections called which contain stabs debugging
2329 && 0 != strcmp(".stab", sectab_i->Name)
2330 && 0 != strcmp(".stabstr", sectab_i->Name)
2331 /* ignore constructor section for now */
2332 && 0 != strcmp(".ctors", sectab_i->Name)
2333 /* ignore section generated from .ident */
2334 && 0!= strcmp("/4", sectab_i->Name)
2335 /* ignore unknown section that appeared in gcc 3.4.5(?) */
2336 && 0!= strcmp(".reloc", sectab_i->Name)
2338 errorBelch("Unknown PEi386 section name `%s' (while processing: %s)", sectab_i->Name, oc->fileName);
2342 if (kind != SECTIONKIND_OTHER && end >= start) {
2343 addSection(oc, kind, start, end);
2344 addProddableBlock(oc, start, end - start + 1);
2348 /* Copy exported symbols into the ObjectCode. */
2350 oc->n_symbols = hdr->NumberOfSymbols;
2351 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
2352 "ocGetNames_PEi386(oc->symbols)");
2353 /* Call me paranoid; I don't care. */
2354 for (i = 0; i < oc->n_symbols; i++)
2355 oc->symbols[i] = NULL;
2359 COFF_symbol* symtab_i;
2360 if (i >= (Int32)(hdr->NumberOfSymbols)) break;
2361 symtab_i = (COFF_symbol*)
2362 myindex ( sizeof_COFF_symbol, symtab, i );
2366 if (symtab_i->StorageClass == MYIMAGE_SYM_CLASS_EXTERNAL
2367 && symtab_i->SectionNumber != MYIMAGE_SYM_UNDEFINED) {
2368 /* This symbol is global and defined, viz, exported */
2369 /* for MYIMAGE_SYMCLASS_EXTERNAL
2370 && !MYIMAGE_SYM_UNDEFINED,
2371 the address of the symbol is:
2372 address of relevant section + offset in section
2374 COFF_section* sectabent
2375 = (COFF_section*) myindex ( sizeof_COFF_section,
2377 symtab_i->SectionNumber-1 );
2378 addr = ((UChar*)(oc->image))
2379 + (sectabent->PointerToRawData
2383 if (symtab_i->SectionNumber == MYIMAGE_SYM_UNDEFINED
2384 && symtab_i->Value > 0) {
2385 /* This symbol isn't in any section at all, ie, global bss.
2386 Allocate zeroed space for it. */
2387 addr = stgCallocBytes(1, symtab_i->Value,
2388 "ocGetNames_PEi386(non-anonymous bss)");
2389 addSection(oc, SECTIONKIND_RWDATA, addr,
2390 ((UChar*)addr) + symtab_i->Value - 1);
2391 addProddableBlock(oc, addr, symtab_i->Value);
2392 /* debugBelch("BSS section at 0x%x\n", addr); */
2395 if (addr != NULL ) {
2396 sname = cstring_from_COFF_symbol_name ( symtab_i->Name, strtab );
2397 /* debugBelch("addSymbol %p `%s \n", addr,sname); */
2398 IF_DEBUG(linker, debugBelch("addSymbol %p `%s'\n", addr,sname);)
2399 ASSERT(i >= 0 && i < oc->n_symbols);
2400 /* cstring_from_COFF_symbol_name always succeeds. */
2401 oc->symbols[i] = sname;
2402 ghciInsertStrHashTable(oc->fileName, symhash, sname, addr);
2406 "IGNORING symbol %d\n"
2410 printName ( symtab_i->Name, strtab );
2419 (Int32)(symtab_i->SectionNumber),
2420 (UInt32)symtab_i->Type,
2421 (UInt32)symtab_i->StorageClass,
2422 (UInt32)symtab_i->NumberOfAuxSymbols
2427 i += symtab_i->NumberOfAuxSymbols;
2436 ocResolve_PEi386 ( ObjectCode* oc )
2439 COFF_section* sectab;
2440 COFF_symbol* symtab;
2450 /* ToDo: should be variable-sized? But is at least safe in the
2451 sense of buffer-overrun-proof. */
2453 /* debugBelch("resolving for %s\n", oc->fileName); */
2455 hdr = (COFF_header*)(oc->image);
2456 sectab = (COFF_section*) (
2457 ((UChar*)(oc->image))
2458 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2460 symtab = (COFF_symbol*) (
2461 ((UChar*)(oc->image))
2462 + hdr->PointerToSymbolTable
2464 strtab = ((UChar*)(oc->image))
2465 + hdr->PointerToSymbolTable
2466 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2468 for (i = 0; i < hdr->NumberOfSections; i++) {
2469 COFF_section* sectab_i
2471 myindex ( sizeof_COFF_section, sectab, i );
2474 ((UChar*)(oc->image)) + sectab_i->PointerToRelocations
2477 /* Ignore sections called which contain stabs debugging
2479 if (0 == strcmp(".stab", sectab_i->Name)
2480 || 0 == strcmp(".stabstr", sectab_i->Name)
2481 || 0 == strcmp(".ctors", sectab_i->Name))
2484 if ( sectab_i->Characteristics & MYIMAGE_SCN_LNK_NRELOC_OVFL ) {
2485 /* If the relocation field (a short) has overflowed, the
2486 * real count can be found in the first reloc entry.
2488 * See Section 4.1 (last para) of the PE spec (rev6.0).
2490 * Nov2003 update: the GNU linker still doesn't correctly
2491 * handle the generation of relocatable object files with
2492 * overflown relocations. Hence the output to warn of potential
2495 COFF_reloc* rel = (COFF_reloc*)
2496 myindex ( sizeof_COFF_reloc, reltab, 0 );
2497 noRelocs = rel->VirtualAddress;
2499 /* 10/05: we now assume (and check for) a GNU ld that is capable
2500 * of handling object files with (>2^16) of relocs.
2503 debugBelch("WARNING: Overflown relocation field (# relocs found: %u)\n",
2508 noRelocs = sectab_i->NumberOfRelocations;
2513 for (; j < noRelocs; j++) {
2515 COFF_reloc* reltab_j
2517 myindex ( sizeof_COFF_reloc, reltab, j );
2519 /* the location to patch */
2521 ((UChar*)(oc->image))
2522 + (sectab_i->PointerToRawData
2523 + reltab_j->VirtualAddress
2524 - sectab_i->VirtualAddress )
2526 /* the existing contents of pP */
2528 /* the symbol to connect to */
2529 sym = (COFF_symbol*)
2530 myindex ( sizeof_COFF_symbol,
2531 symtab, reltab_j->SymbolTableIndex );
2534 "reloc sec %2d num %3d: type 0x%-4x "
2535 "vaddr 0x%-8x name `",
2537 (UInt32)reltab_j->Type,
2538 reltab_j->VirtualAddress );
2539 printName ( sym->Name, strtab );
2540 debugBelch("'\n" ));
2542 if (sym->StorageClass == MYIMAGE_SYM_CLASS_STATIC) {
2543 COFF_section* section_sym
2544 = findPEi386SectionCalled ( oc, sym->Name );
2546 errorBelch("%s: can't find section `%s'", oc->fileName, sym->Name);
2549 S = ((UInt32)(oc->image))
2550 + (section_sym->PointerToRawData
2553 copyName ( sym->Name, strtab, symbol, 1000-1 );
2554 S = (UInt32) lookupSymbol( symbol );
2555 if ((void*)S != NULL) goto foundit;
2556 /* Newline first because the interactive linker has printed "linking..." */
2557 errorBelch("\n%s: unknown symbol `%s'", oc->fileName, symbol);
2561 checkProddableBlock(oc, pP);
2562 switch (reltab_j->Type) {
2563 case MYIMAGE_REL_I386_DIR32:
2566 case MYIMAGE_REL_I386_REL32:
2567 /* Tricky. We have to insert a displacement at
2568 pP which, when added to the PC for the _next_
2569 insn, gives the address of the target (S).
2570 Problem is to know the address of the next insn
2571 when we only know pP. We assume that this
2572 literal field is always the last in the insn,
2573 so that the address of the next insn is pP+4
2574 -- hence the constant 4.
2575 Also I don't know if A should be added, but so
2576 far it has always been zero.
2578 SOF 05/2005: 'A' (old contents of *pP) have been observed
2579 to contain values other than zero (the 'wx' object file
2580 that came with wxhaskell-0.9.4; dunno how it was compiled..).
2581 So, add displacement to old value instead of asserting
2582 A to be zero. Fixes wxhaskell-related crashes, and no other
2583 ill effects have been observed.
2585 Update: the reason why we're seeing these more elaborate
2586 relocations is due to a switch in how the NCG compiles SRTs
2587 and offsets to them from info tables. SRTs live in .(ro)data,
2588 while info tables live in .text, causing GAS to emit REL32/DISP32
2589 relocations with non-zero values. Adding the displacement is
2590 the right thing to do.
2592 *pP = S - ((UInt32)pP) - 4 + A;
2595 debugBelch("%s: unhandled PEi386 relocation type %d",
2596 oc->fileName, reltab_j->Type);
2603 IF_DEBUG(linker, debugBelch("completed %s", oc->fileName));
2607 #endif /* defined(OBJFORMAT_PEi386) */
2610 /* --------------------------------------------------------------------------
2612 * ------------------------------------------------------------------------*/
2614 #if defined(OBJFORMAT_ELF)
2619 #if defined(sparc_HOST_ARCH)
2620 # define ELF_TARGET_SPARC /* Used inside <elf.h> */
2621 #elif defined(i386_HOST_ARCH)
2622 # define ELF_TARGET_386 /* Used inside <elf.h> */
2623 #elif defined(x86_64_HOST_ARCH)
2624 # define ELF_TARGET_X64_64
2626 #elif defined (ia64_HOST_ARCH)
2627 # define ELF_TARGET_IA64 /* Used inside <elf.h> */
2629 # define ELF_FUNCTION_DESC /* calling convention uses function descriptors */
2630 # define ELF_NEED_GOT /* needs Global Offset Table */
2631 # define ELF_NEED_PLT /* needs Procedure Linkage Tables */
2634 #if !defined(openbsd_HOST_OS)
2637 /* openbsd elf has things in different places, with diff names */
2638 # include <elf_abi.h>
2639 # include <machine/reloc.h>
2640 # define R_386_32 RELOC_32
2641 # define R_386_PC32 RELOC_PC32
2644 /* If elf.h doesn't define it */
2645 # ifndef R_X86_64_PC64
2646 # define R_X86_64_PC64 24
2650 * Define a set of types which can be used for both ELF32 and ELF64
2654 #define ELFCLASS ELFCLASS64
2655 #define Elf_Addr Elf64_Addr
2656 #define Elf_Word Elf64_Word
2657 #define Elf_Sword Elf64_Sword
2658 #define Elf_Ehdr Elf64_Ehdr
2659 #define Elf_Phdr Elf64_Phdr
2660 #define Elf_Shdr Elf64_Shdr
2661 #define Elf_Sym Elf64_Sym
2662 #define Elf_Rel Elf64_Rel
2663 #define Elf_Rela Elf64_Rela
2664 #define ELF_ST_TYPE ELF64_ST_TYPE
2665 #define ELF_ST_BIND ELF64_ST_BIND
2666 #define ELF_R_TYPE ELF64_R_TYPE
2667 #define ELF_R_SYM ELF64_R_SYM
2669 #define ELFCLASS ELFCLASS32
2670 #define Elf_Addr Elf32_Addr
2671 #define Elf_Word Elf32_Word
2672 #define Elf_Sword Elf32_Sword
2673 #define Elf_Ehdr Elf32_Ehdr
2674 #define Elf_Phdr Elf32_Phdr
2675 #define Elf_Shdr Elf32_Shdr
2676 #define Elf_Sym Elf32_Sym
2677 #define Elf_Rel Elf32_Rel
2678 #define Elf_Rela Elf32_Rela
2680 #define ELF_ST_TYPE ELF32_ST_TYPE
2683 #define ELF_ST_BIND ELF32_ST_BIND
2686 #define ELF_R_TYPE ELF32_R_TYPE
2689 #define ELF_R_SYM ELF32_R_SYM
2695 * Functions to allocate entries in dynamic sections. Currently we simply
2696 * preallocate a large number, and we don't check if a entry for the given
2697 * target already exists (a linear search is too slow). Ideally these
2698 * entries would be associated with symbols.
2701 /* These sizes sufficient to load HSbase + HShaskell98 + a few modules */
2702 #define GOT_SIZE 0x20000
2703 #define FUNCTION_TABLE_SIZE 0x10000
2704 #define PLT_SIZE 0x08000
2707 static Elf_Addr got[GOT_SIZE];
2708 static unsigned int gotIndex;
2709 static Elf_Addr gp_val = (Elf_Addr)got;
2712 allocateGOTEntry(Elf_Addr target)
2716 if (gotIndex >= GOT_SIZE)
2717 barf("Global offset table overflow");
2719 entry = &got[gotIndex++];
2721 return (Elf_Addr)entry;
2725 #ifdef ELF_FUNCTION_DESC
2731 static FunctionDesc functionTable[FUNCTION_TABLE_SIZE];
2732 static unsigned int functionTableIndex;
2735 allocateFunctionDesc(Elf_Addr target)
2737 FunctionDesc *entry;
2739 if (functionTableIndex >= FUNCTION_TABLE_SIZE)
2740 barf("Function table overflow");
2742 entry = &functionTable[functionTableIndex++];
2744 entry->gp = (Elf_Addr)gp_val;
2745 return (Elf_Addr)entry;
2749 copyFunctionDesc(Elf_Addr target)
2751 FunctionDesc *olddesc = (FunctionDesc *)target;
2752 FunctionDesc *newdesc;
2754 newdesc = (FunctionDesc *)allocateFunctionDesc(olddesc->ip);
2755 newdesc->gp = olddesc->gp;
2756 return (Elf_Addr)newdesc;
2761 #ifdef ia64_HOST_ARCH
2762 static void ia64_reloc_gprel22(Elf_Addr target, Elf_Addr value);
2763 static void ia64_reloc_pcrel21(Elf_Addr target, Elf_Addr value, ObjectCode *oc);
2765 static unsigned char plt_code[] =
2767 /* taken from binutils bfd/elfxx-ia64.c */
2768 0x0b, 0x78, 0x00, 0x02, 0x00, 0x24, /* [MMI] addl r15=0,r1;; */
2769 0x00, 0x41, 0x3c, 0x30, 0x28, 0xc0, /* ld8 r16=[r15],8 */
2770 0x01, 0x08, 0x00, 0x84, /* mov r14=r1;; */
2771 0x11, 0x08, 0x00, 0x1e, 0x18, 0x10, /* [MIB] ld8 r1=[r15] */
2772 0x60, 0x80, 0x04, 0x80, 0x03, 0x00, /* mov b6=r16 */
2773 0x60, 0x00, 0x80, 0x00 /* br.few b6;; */
2776 /* If we can't get to the function descriptor via gp, take a local copy of it */
2777 #define PLT_RELOC(code, target) { \
2778 Elf64_Sxword rel_value = target - gp_val; \
2779 if ((rel_value > 0x1fffff) || (rel_value < -0x1fffff)) \
2780 ia64_reloc_gprel22((Elf_Addr)code, copyFunctionDesc(target)); \
2782 ia64_reloc_gprel22((Elf_Addr)code, target); \
2787 unsigned char code[sizeof(plt_code)];
2791 allocatePLTEntry(Elf_Addr target, ObjectCode *oc)
2793 PLTEntry *plt = (PLTEntry *)oc->plt;
2796 if (oc->pltIndex >= PLT_SIZE)
2797 barf("Procedure table overflow");
2799 entry = &plt[oc->pltIndex++];
2800 memcpy(entry->code, plt_code, sizeof(entry->code));
2801 PLT_RELOC(entry->code, target);
2802 return (Elf_Addr)entry;
2808 return (PLT_SIZE * sizeof(PLTEntry));
2814 * Generic ELF functions
2818 findElfSection ( void* objImage, Elf_Word sh_type )
2820 char* ehdrC = (char*)objImage;
2821 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
2822 Elf_Shdr* shdr = (Elf_Shdr*)(ehdrC + ehdr->e_shoff);
2823 char* sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
2827 for (i = 0; i < ehdr->e_shnum; i++) {
2828 if (shdr[i].sh_type == sh_type
2829 /* Ignore the section header's string table. */
2830 && i != ehdr->e_shstrndx
2831 /* Ignore string tables named .stabstr, as they contain
2833 && 0 != memcmp(".stabstr", sh_strtab + shdr[i].sh_name, 8)
2835 ptr = ehdrC + shdr[i].sh_offset;
2842 #if defined(ia64_HOST_ARCH)
2844 findElfSegment ( void* objImage, Elf_Addr vaddr )
2846 char* ehdrC = (char*)objImage;
2847 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
2848 Elf_Phdr* phdr = (Elf_Phdr*)(ehdrC + ehdr->e_phoff);
2849 Elf_Addr segaddr = 0;
2852 for (i = 0; i < ehdr->e_phnum; i++) {
2853 segaddr = phdr[i].p_vaddr;
2854 if ((vaddr >= segaddr) && (vaddr < segaddr + phdr[i].p_memsz))
2862 ocVerifyImage_ELF ( ObjectCode* oc )
2866 int i, j, nent, nstrtab, nsymtabs;
2870 char* ehdrC = (char*)(oc->image);
2871 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
2873 if (ehdr->e_ident[EI_MAG0] != ELFMAG0 ||
2874 ehdr->e_ident[EI_MAG1] != ELFMAG1 ||
2875 ehdr->e_ident[EI_MAG2] != ELFMAG2 ||
2876 ehdr->e_ident[EI_MAG3] != ELFMAG3) {
2877 errorBelch("%s: not an ELF object", oc->fileName);
2881 if (ehdr->e_ident[EI_CLASS] != ELFCLASS) {
2882 errorBelch("%s: unsupported ELF format", oc->fileName);
2886 if (ehdr->e_ident[EI_DATA] == ELFDATA2LSB) {
2887 IF_DEBUG(linker,debugBelch( "Is little-endian\n" ));
2889 if (ehdr->e_ident[EI_DATA] == ELFDATA2MSB) {
2890 IF_DEBUG(linker,debugBelch( "Is big-endian\n" ));
2892 errorBelch("%s: unknown endiannness", oc->fileName);
2896 if (ehdr->e_type != ET_REL) {
2897 errorBelch("%s: not a relocatable object (.o) file", oc->fileName);
2900 IF_DEBUG(linker, debugBelch( "Is a relocatable object (.o) file\n" ));
2902 IF_DEBUG(linker,debugBelch( "Architecture is " ));
2903 switch (ehdr->e_machine) {
2904 case EM_386: IF_DEBUG(linker,debugBelch( "x86" )); break;
2905 #ifdef EM_SPARC32PLUS
2906 case EM_SPARC32PLUS:
2908 case EM_SPARC: IF_DEBUG(linker,debugBelch( "sparc" )); break;
2910 case EM_IA_64: IF_DEBUG(linker,debugBelch( "ia64" )); break;
2912 case EM_PPC: IF_DEBUG(linker,debugBelch( "powerpc32" )); break;
2914 case EM_X86_64: IF_DEBUG(linker,debugBelch( "x86_64" )); break;
2915 #elif defined(EM_AMD64)
2916 case EM_AMD64: IF_DEBUG(linker,debugBelch( "amd64" )); break;
2918 default: IF_DEBUG(linker,debugBelch( "unknown" ));
2919 errorBelch("%s: unknown architecture (e_machine == %d)"
2920 , oc->fileName, ehdr->e_machine);
2924 IF_DEBUG(linker,debugBelch(
2925 "\nSection header table: start %ld, n_entries %d, ent_size %d\n",
2926 (long)ehdr->e_shoff, ehdr->e_shnum, ehdr->e_shentsize ));
2928 ASSERT (ehdr->e_shentsize == sizeof(Elf_Shdr));
2930 shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
2932 if (ehdr->e_shstrndx == SHN_UNDEF) {
2933 errorBelch("%s: no section header string table", oc->fileName);
2936 IF_DEBUG(linker,debugBelch( "Section header string table is section %d\n",
2938 sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
2941 for (i = 0; i < ehdr->e_shnum; i++) {
2942 IF_DEBUG(linker,debugBelch("%2d: ", i ));
2943 IF_DEBUG(linker,debugBelch("type=%2d ", (int)shdr[i].sh_type ));
2944 IF_DEBUG(linker,debugBelch("size=%4d ", (int)shdr[i].sh_size ));
2945 IF_DEBUG(linker,debugBelch("offs=%4d ", (int)shdr[i].sh_offset ));
2946 IF_DEBUG(linker,debugBelch(" (%p .. %p) ",
2947 ehdrC + shdr[i].sh_offset,
2948 ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1));
2950 if (shdr[i].sh_type == SHT_REL) {
2951 IF_DEBUG(linker,debugBelch("Rel " ));
2952 } else if (shdr[i].sh_type == SHT_RELA) {
2953 IF_DEBUG(linker,debugBelch("RelA " ));
2955 IF_DEBUG(linker,debugBelch(" "));
2958 IF_DEBUG(linker,debugBelch("sname=%s\n", sh_strtab + shdr[i].sh_name ));
2962 IF_DEBUG(linker,debugBelch( "\nString tables" ));
2965 for (i = 0; i < ehdr->e_shnum; i++) {
2966 if (shdr[i].sh_type == SHT_STRTAB
2967 /* Ignore the section header's string table. */
2968 && i != ehdr->e_shstrndx
2969 /* Ignore string tables named .stabstr, as they contain
2971 && 0 != memcmp(".stabstr", sh_strtab + shdr[i].sh_name, 8)
2973 IF_DEBUG(linker,debugBelch(" section %d is a normal string table", i ));
2974 strtab = ehdrC + shdr[i].sh_offset;
2979 errorBelch("%s: no string tables, or too many", oc->fileName);
2984 IF_DEBUG(linker,debugBelch( "\nSymbol tables" ));
2985 for (i = 0; i < ehdr->e_shnum; i++) {
2986 if (shdr[i].sh_type != SHT_SYMTAB) continue;
2987 IF_DEBUG(linker,debugBelch( "section %d is a symbol table\n", i ));
2989 stab = (Elf_Sym*) (ehdrC + shdr[i].sh_offset);
2990 nent = shdr[i].sh_size / sizeof(Elf_Sym);
2991 IF_DEBUG(linker,debugBelch( " number of entries is apparently %d (%ld rem)\n",
2993 (long)shdr[i].sh_size % sizeof(Elf_Sym)
2995 if (0 != shdr[i].sh_size % sizeof(Elf_Sym)) {
2996 errorBelch("%s: non-integral number of symbol table entries", oc->fileName);
2999 for (j = 0; j < nent; j++) {
3000 IF_DEBUG(linker,debugBelch(" %2d ", j ));
3001 IF_DEBUG(linker,debugBelch(" sec=%-5d size=%-3d val=%5p ",
3002 (int)stab[j].st_shndx,
3003 (int)stab[j].st_size,
3004 (char*)stab[j].st_value ));
3006 IF_DEBUG(linker,debugBelch("type=" ));
3007 switch (ELF_ST_TYPE(stab[j].st_info)) {
3008 case STT_NOTYPE: IF_DEBUG(linker,debugBelch("notype " )); break;
3009 case STT_OBJECT: IF_DEBUG(linker,debugBelch("object " )); break;
3010 case STT_FUNC : IF_DEBUG(linker,debugBelch("func " )); break;
3011 case STT_SECTION: IF_DEBUG(linker,debugBelch("section" )); break;
3012 case STT_FILE: IF_DEBUG(linker,debugBelch("file " )); break;
3013 default: IF_DEBUG(linker,debugBelch("? " )); break;
3015 IF_DEBUG(linker,debugBelch(" " ));
3017 IF_DEBUG(linker,debugBelch("bind=" ));
3018 switch (ELF_ST_BIND(stab[j].st_info)) {
3019 case STB_LOCAL : IF_DEBUG(linker,debugBelch("local " )); break;
3020 case STB_GLOBAL: IF_DEBUG(linker,debugBelch("global" )); break;
3021 case STB_WEAK : IF_DEBUG(linker,debugBelch("weak " )); break;
3022 default: IF_DEBUG(linker,debugBelch("? " )); break;
3024 IF_DEBUG(linker,debugBelch(" " ));
3026 IF_DEBUG(linker,debugBelch("name=%s\n", strtab + stab[j].st_name ));
3030 if (nsymtabs == 0) {
3031 errorBelch("%s: didn't find any symbol tables", oc->fileName);
3038 static int getSectionKind_ELF( Elf_Shdr *hdr, int *is_bss )
3042 if (hdr->sh_type == SHT_PROGBITS
3043 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_EXECINSTR)) {
3044 /* .text-style section */
3045 return SECTIONKIND_CODE_OR_RODATA;
3048 if (hdr->sh_type == SHT_PROGBITS
3049 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_WRITE)) {
3050 /* .data-style section */
3051 return SECTIONKIND_RWDATA;
3054 if (hdr->sh_type == SHT_PROGBITS
3055 && (hdr->sh_flags & SHF_ALLOC) && !(hdr->sh_flags & SHF_WRITE)) {
3056 /* .rodata-style section */
3057 return SECTIONKIND_CODE_OR_RODATA;
3060 if (hdr->sh_type == SHT_NOBITS
3061 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_WRITE)) {
3062 /* .bss-style section */
3064 return SECTIONKIND_RWDATA;
3067 return SECTIONKIND_OTHER;
3072 ocGetNames_ELF ( ObjectCode* oc )
3077 char* ehdrC = (char*)(oc->image);
3078 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3079 char* strtab = findElfSection ( ehdrC, SHT_STRTAB );
3080 Elf_Shdr* shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
3082 ASSERT(symhash != NULL);
3085 errorBelch("%s: no strtab", oc->fileName);
3090 for (i = 0; i < ehdr->e_shnum; i++) {
3091 /* Figure out what kind of section it is. Logic derived from
3092 Figure 1.14 ("Special Sections") of the ELF document
3093 ("Portable Formats Specification, Version 1.1"). */
3095 SectionKind kind = getSectionKind_ELF(&shdr[i], &is_bss);
3097 if (is_bss && shdr[i].sh_size > 0) {
3098 /* This is a non-empty .bss section. Allocate zeroed space for
3099 it, and set its .sh_offset field such that
3100 ehdrC + .sh_offset == addr_of_zeroed_space. */
3101 char* zspace = stgCallocBytes(1, shdr[i].sh_size,
3102 "ocGetNames_ELF(BSS)");
3103 shdr[i].sh_offset = ((char*)zspace) - ((char*)ehdrC);
3105 debugBelch("BSS section at 0x%x, size %d\n",
3106 zspace, shdr[i].sh_size);
3110 /* fill in the section info */
3111 if (kind != SECTIONKIND_OTHER && shdr[i].sh_size > 0) {
3112 addProddableBlock(oc, ehdrC + shdr[i].sh_offset, shdr[i].sh_size);
3113 addSection(oc, kind, ehdrC + shdr[i].sh_offset,
3114 ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1);
3117 if (shdr[i].sh_type != SHT_SYMTAB) continue;
3119 /* copy stuff into this module's object symbol table */
3120 stab = (Elf_Sym*) (ehdrC + shdr[i].sh_offset);
3121 nent = shdr[i].sh_size / sizeof(Elf_Sym);
3123 oc->n_symbols = nent;
3124 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
3125 "ocGetNames_ELF(oc->symbols)");
3127 for (j = 0; j < nent; j++) {
3129 char isLocal = FALSE; /* avoids uninit-var warning */
3131 char* nm = strtab + stab[j].st_name;
3132 int secno = stab[j].st_shndx;
3134 /* Figure out if we want to add it; if so, set ad to its
3135 address. Otherwise leave ad == NULL. */
3137 if (secno == SHN_COMMON) {
3139 ad = stgCallocBytes(1, stab[j].st_size, "ocGetNames_ELF(COMMON)");
3141 debugBelch("COMMON symbol, size %d name %s\n",
3142 stab[j].st_size, nm);
3144 /* Pointless to do addProddableBlock() for this area,
3145 since the linker should never poke around in it. */
3148 if ( ( ELF_ST_BIND(stab[j].st_info)==STB_GLOBAL
3149 || ELF_ST_BIND(stab[j].st_info)==STB_LOCAL
3151 /* and not an undefined symbol */
3152 && stab[j].st_shndx != SHN_UNDEF
3153 /* and not in a "special section" */
3154 && stab[j].st_shndx < SHN_LORESERVE
3156 /* and it's a not a section or string table or anything silly */
3157 ( ELF_ST_TYPE(stab[j].st_info)==STT_FUNC ||
3158 ELF_ST_TYPE(stab[j].st_info)==STT_OBJECT ||
3159 ELF_ST_TYPE(stab[j].st_info)==STT_NOTYPE
3162 /* Section 0 is the undefined section, hence > and not >=. */
3163 ASSERT(secno > 0 && secno < ehdr->e_shnum);
3165 if (shdr[secno].sh_type == SHT_NOBITS) {
3166 debugBelch(" BSS symbol, size %d off %d name %s\n",
3167 stab[j].st_size, stab[j].st_value, nm);
3170 ad = ehdrC + shdr[ secno ].sh_offset + stab[j].st_value;
3171 if (ELF_ST_BIND(stab[j].st_info)==STB_LOCAL) {
3174 #ifdef ELF_FUNCTION_DESC
3175 /* dlsym() and the initialisation table both give us function
3176 * descriptors, so to be consistent we store function descriptors
3177 * in the symbol table */
3178 if (ELF_ST_TYPE(stab[j].st_info) == STT_FUNC)
3179 ad = (char *)allocateFunctionDesc((Elf_Addr)ad);
3181 IF_DEBUG(linker,debugBelch( "addOTabName(GLOB): %10p %s %s\n",
3182 ad, oc->fileName, nm ));
3187 /* And the decision is ... */
3191 oc->symbols[j] = nm;
3194 /* Ignore entirely. */
3196 ghciInsertStrHashTable(oc->fileName, symhash, nm, ad);
3200 IF_DEBUG(linker,debugBelch( "skipping `%s'\n",
3201 strtab + stab[j].st_name ));
3204 "skipping bind = %d, type = %d, shndx = %d `%s'\n",
3205 (int)ELF_ST_BIND(stab[j].st_info),
3206 (int)ELF_ST_TYPE(stab[j].st_info),
3207 (int)stab[j].st_shndx,
3208 strtab + stab[j].st_name
3211 oc->symbols[j] = NULL;
3220 /* Do ELF relocations which lack an explicit addend. All x86-linux
3221 relocations appear to be of this form. */
3223 do_Elf_Rel_relocations ( ObjectCode* oc, char* ehdrC,
3224 Elf_Shdr* shdr, int shnum,
3225 Elf_Sym* stab, char* strtab )
3230 Elf_Rel* rtab = (Elf_Rel*) (ehdrC + shdr[shnum].sh_offset);
3231 int nent = shdr[shnum].sh_size / sizeof(Elf_Rel);
3232 int target_shndx = shdr[shnum].sh_info;
3233 int symtab_shndx = shdr[shnum].sh_link;
3235 stab = (Elf_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
3236 targ = (Elf_Word*)(ehdrC + shdr[ target_shndx ].sh_offset);
3237 IF_DEBUG(linker,debugBelch( "relocations for section %d using symtab %d\n",
3238 target_shndx, symtab_shndx ));
3240 /* Skip sections that we're not interested in. */
3243 SectionKind kind = getSectionKind_ELF(&shdr[target_shndx], &is_bss);
3244 if (kind == SECTIONKIND_OTHER) {
3245 IF_DEBUG(linker,debugBelch( "skipping (target section not loaded)"));
3250 for (j = 0; j < nent; j++) {
3251 Elf_Addr offset = rtab[j].r_offset;
3252 Elf_Addr info = rtab[j].r_info;
3254 Elf_Addr P = ((Elf_Addr)targ) + offset;
3255 Elf_Word* pP = (Elf_Word*)P;
3260 StgStablePtr stablePtr;
3263 IF_DEBUG(linker,debugBelch( "Rel entry %3d is raw(%6p %6p)",
3264 j, (void*)offset, (void*)info ));
3266 IF_DEBUG(linker,debugBelch( " ZERO" ));
3269 Elf_Sym sym = stab[ELF_R_SYM(info)];
3270 /* First see if it is a local symbol. */
3271 if (ELF_ST_BIND(sym.st_info) == STB_LOCAL) {
3272 /* Yes, so we can get the address directly from the ELF symbol
3274 symbol = sym.st_name==0 ? "(noname)" : strtab+sym.st_name;
3276 (ehdrC + shdr[ sym.st_shndx ].sh_offset
3277 + stab[ELF_R_SYM(info)].st_value);
3280 symbol = strtab + sym.st_name;
3281 stablePtr = (StgStablePtr)lookupHashTable(stablehash, (StgWord)symbol);
3282 if (NULL == stablePtr) {
3283 /* No, so look up the name in our global table. */
3284 S_tmp = lookupSymbol( symbol );
3285 S = (Elf_Addr)S_tmp;
3287 stableVal = deRefStablePtr( stablePtr );
3289 S = (Elf_Addr)S_tmp;
3293 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3296 IF_DEBUG(linker,debugBelch( "`%s' resolves to %p\n", symbol, (void*)S ));
3299 IF_DEBUG(linker,debugBelch( "Reloc: P = %p S = %p A = %p\n",
3300 (void*)P, (void*)S, (void*)A ));
3301 checkProddableBlock ( oc, pP );
3305 switch (ELF_R_TYPE(info)) {
3306 # ifdef i386_HOST_ARCH
3307 case R_386_32: *pP = value; break;
3308 case R_386_PC32: *pP = value - P; break;
3311 errorBelch("%s: unhandled ELF relocation(Rel) type %lu\n",
3312 oc->fileName, (lnat)ELF_R_TYPE(info));
3320 /* Do ELF relocations for which explicit addends are supplied.
3321 sparc-solaris relocations appear to be of this form. */
3323 do_Elf_Rela_relocations ( ObjectCode* oc, char* ehdrC,
3324 Elf_Shdr* shdr, int shnum,
3325 Elf_Sym* stab, char* strtab )
3328 char *symbol = NULL;
3330 Elf_Rela* rtab = (Elf_Rela*) (ehdrC + shdr[shnum].sh_offset);
3331 int nent = shdr[shnum].sh_size / sizeof(Elf_Rela);
3332 int target_shndx = shdr[shnum].sh_info;
3333 int symtab_shndx = shdr[shnum].sh_link;
3335 stab = (Elf_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
3336 targ = (Elf_Addr) (ehdrC + shdr[ target_shndx ].sh_offset);
3337 IF_DEBUG(linker,debugBelch( "relocations for section %d using symtab %d\n",
3338 target_shndx, symtab_shndx ));
3340 for (j = 0; j < nent; j++) {
3341 #if defined(DEBUG) || defined(sparc_HOST_ARCH) || defined(ia64_HOST_ARCH) || defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
3342 /* This #ifdef only serves to avoid unused-var warnings. */
3343 Elf_Addr offset = rtab[j].r_offset;
3344 Elf_Addr P = targ + offset;
3346 Elf_Addr info = rtab[j].r_info;
3347 Elf_Addr A = rtab[j].r_addend;
3351 # if defined(sparc_HOST_ARCH)
3352 Elf_Word* pP = (Elf_Word*)P;
3354 # elif defined(ia64_HOST_ARCH)
3355 Elf64_Xword *pP = (Elf64_Xword *)P;
3357 # elif defined(powerpc_HOST_ARCH)
3361 IF_DEBUG(linker,debugBelch( "Rel entry %3d is raw(%6p %6p %6p) ",
3362 j, (void*)offset, (void*)info,
3365 IF_DEBUG(linker,debugBelch( " ZERO" ));
3368 Elf_Sym sym = stab[ELF_R_SYM(info)];
3369 /* First see if it is a local symbol. */
3370 if (ELF_ST_BIND(sym.st_info) == STB_LOCAL) {
3371 /* Yes, so we can get the address directly from the ELF symbol
3373 symbol = sym.st_name==0 ? "(noname)" : strtab+sym.st_name;
3375 (ehdrC + shdr[ sym.st_shndx ].sh_offset
3376 + stab[ELF_R_SYM(info)].st_value);
3377 #ifdef ELF_FUNCTION_DESC
3378 /* Make a function descriptor for this function */
3379 if (S && ELF_ST_TYPE(sym.st_info) == STT_FUNC) {
3380 S = allocateFunctionDesc(S + A);
3385 /* No, so look up the name in our global table. */
3386 symbol = strtab + sym.st_name;
3387 S_tmp = lookupSymbol( symbol );
3388 S = (Elf_Addr)S_tmp;
3390 #ifdef ELF_FUNCTION_DESC
3391 /* If a function, already a function descriptor - we would
3392 have to copy it to add an offset. */
3393 if (S && (ELF_ST_TYPE(sym.st_info) == STT_FUNC) && (A != 0))
3394 errorBelch("%s: function %s with addend %p", oc->fileName, symbol, (void *)A);
3398 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3401 IF_DEBUG(linker,debugBelch( "`%s' resolves to %p", symbol, (void*)S ));
3404 IF_DEBUG(linker,debugBelch("Reloc: P = %p S = %p A = %p\n",
3405 (void*)P, (void*)S, (void*)A ));
3406 /* checkProddableBlock ( oc, (void*)P ); */
3410 switch (ELF_R_TYPE(info)) {
3411 # if defined(sparc_HOST_ARCH)
3412 case R_SPARC_WDISP30:
3413 w1 = *pP & 0xC0000000;
3414 w2 = (Elf_Word)((value - P) >> 2);
3415 ASSERT((w2 & 0xC0000000) == 0);
3420 w1 = *pP & 0xFFC00000;
3421 w2 = (Elf_Word)(value >> 10);
3422 ASSERT((w2 & 0xFFC00000) == 0);
3428 w2 = (Elf_Word)(value & 0x3FF);
3429 ASSERT((w2 & ~0x3FF) == 0);
3433 /* According to the Sun documentation:
3435 This relocation type resembles R_SPARC_32, except it refers to an
3436 unaligned word. That is, the word to be relocated must be treated
3437 as four separate bytes with arbitrary alignment, not as a word
3438 aligned according to the architecture requirements.
3440 (JRS: which means that freeloading on the R_SPARC_32 case
3441 is probably wrong, but hey ...)
3445 w2 = (Elf_Word)value;
3448 # elif defined(ia64_HOST_ARCH)
3449 case R_IA64_DIR64LSB:
3450 case R_IA64_FPTR64LSB:
3453 case R_IA64_PCREL64LSB:
3456 case R_IA64_SEGREL64LSB:
3457 addr = findElfSegment(ehdrC, value);
3460 case R_IA64_GPREL22:
3461 ia64_reloc_gprel22(P, value);
3463 case R_IA64_LTOFF22:
3464 case R_IA64_LTOFF22X:
3465 case R_IA64_LTOFF_FPTR22:
3466 addr = allocateGOTEntry(value);
3467 ia64_reloc_gprel22(P, addr);
3469 case R_IA64_PCREL21B:
3470 ia64_reloc_pcrel21(P, S, oc);
3473 /* This goes with R_IA64_LTOFF22X and points to the load to
3474 * convert into a move. We don't implement relaxation. */
3476 # elif defined(powerpc_HOST_ARCH)
3477 case R_PPC_ADDR16_LO:
3478 *(Elf32_Half*) P = value;
3481 case R_PPC_ADDR16_HI:
3482 *(Elf32_Half*) P = value >> 16;
3485 case R_PPC_ADDR16_HA:
3486 *(Elf32_Half*) P = (value + 0x8000) >> 16;
3490 *(Elf32_Word *) P = value;
3494 *(Elf32_Word *) P = value - P;
3500 if( delta << 6 >> 6 != delta )
3502 value = (Elf_Addr) (&makeSymbolExtra( oc, ELF_R_SYM(info), value )
3506 if( value == 0 || delta << 6 >> 6 != delta )
3508 barf( "Unable to make SymbolExtra for #%d",
3514 *(Elf_Word *) P = (*(Elf_Word *) P & 0xfc000003)
3515 | (delta & 0x3fffffc);
3519 #if x86_64_HOST_ARCH
3521 *(Elf64_Xword *)P = value;
3526 StgInt64 off = value - P;
3527 if (off >= 0x7fffffffL || off < -0x80000000L) {
3528 #if X86_64_ELF_NONPIC_HACK
3529 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
3531 off = pltAddress + A - P;
3533 barf("R_X86_64_PC32 relocation out of range: %s = %p\nRecompile %s with -fPIC.",
3534 symbol, off, oc->fileName );
3537 *(Elf64_Word *)P = (Elf64_Word)off;
3543 StgInt64 off = value - P;
3544 *(Elf64_Word *)P = (Elf64_Word)off;
3549 if (value >= 0x7fffffffL) {
3550 #if X86_64_ELF_NONPIC_HACK
3551 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
3553 value = pltAddress + A;
3555 barf("R_X86_64_32 relocation out of range: %s = %p\nRecompile %s with -fPIC.",
3556 symbol, value, oc->fileName );
3559 *(Elf64_Word *)P = (Elf64_Word)value;
3563 if ((StgInt64)value > 0x7fffffffL || (StgInt64)value < -0x80000000L) {
3564 #if X86_64_ELF_NONPIC_HACK
3565 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
3567 value = pltAddress + A;
3569 barf("R_X86_64_32S relocation out of range: %s = %p\nRecompile %s with -fPIC.",
3570 symbol, value, oc->fileName );
3573 *(Elf64_Sword *)P = (Elf64_Sword)value;
3576 case R_X86_64_GOTPCREL:
3578 StgInt64 gotAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)->addr;
3579 StgInt64 off = gotAddress + A - P;
3580 *(Elf64_Word *)P = (Elf64_Word)off;
3584 case R_X86_64_PLT32:
3586 StgInt64 off = value - P;
3587 if (off >= 0x7fffffffL || off < -0x80000000L) {
3588 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
3590 off = pltAddress + A - P;
3592 *(Elf64_Word *)P = (Elf64_Word)off;
3598 errorBelch("%s: unhandled ELF relocation(RelA) type %lu\n",
3599 oc->fileName, (lnat)ELF_R_TYPE(info));
3608 ocResolve_ELF ( ObjectCode* oc )
3612 Elf_Sym* stab = NULL;
3613 char* ehdrC = (char*)(oc->image);
3614 Elf_Ehdr* ehdr = (Elf_Ehdr*) ehdrC;
3615 Elf_Shdr* shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
3617 /* first find "the" symbol table */
3618 stab = (Elf_Sym*) findElfSection ( ehdrC, SHT_SYMTAB );
3620 /* also go find the string table */
3621 strtab = findElfSection ( ehdrC, SHT_STRTAB );
3623 if (stab == NULL || strtab == NULL) {
3624 errorBelch("%s: can't find string or symbol table", oc->fileName);
3628 /* Process the relocation sections. */
3629 for (shnum = 0; shnum < ehdr->e_shnum; shnum++) {
3630 if (shdr[shnum].sh_type == SHT_REL) {
3631 ok = do_Elf_Rel_relocations ( oc, ehdrC, shdr,
3632 shnum, stab, strtab );
3636 if (shdr[shnum].sh_type == SHT_RELA) {
3637 ok = do_Elf_Rela_relocations ( oc, ehdrC, shdr,
3638 shnum, stab, strtab );
3643 #if defined(powerpc_HOST_ARCH)
3644 ocFlushInstructionCache( oc );
3652 * Instructions are 41 bits long, packed into 128 bit bundles with a 5-bit template
3653 * at the front. The following utility functions pack and unpack instructions, and
3654 * take care of the most common relocations.
3657 #ifdef ia64_HOST_ARCH
3660 ia64_extract_instruction(Elf64_Xword *target)
3663 int slot = (Elf_Addr)target & 3;
3664 target = (Elf_Addr)target & ~3;
3672 return ((w1 >> 5) & 0x1ffffffffff);
3674 return (w1 >> 46) | ((w2 & 0x7fffff) << 18);
3678 barf("ia64_extract_instruction: invalid slot %p", target);
3683 ia64_deposit_instruction(Elf64_Xword *target, Elf64_Xword value)
3685 int slot = (Elf_Addr)target & 3;
3686 target = (Elf_Addr)target & ~3;
3691 *target |= value << 5;
3694 *target |= value << 46;
3695 *(target+1) |= value >> 18;
3698 *(target+1) |= value << 23;
3704 ia64_reloc_gprel22(Elf_Addr target, Elf_Addr value)
3706 Elf64_Xword instruction;
3707 Elf64_Sxword rel_value;
3709 rel_value = value - gp_val;
3710 if ((rel_value > 0x1fffff) || (rel_value < -0x1fffff))
3711 barf("GP-relative data out of range (address = 0x%lx, gp = 0x%lx)", value, gp_val);
3713 instruction = ia64_extract_instruction((Elf64_Xword *)target);
3714 instruction |= (((rel_value >> 0) & 0x07f) << 13) /* imm7b */
3715 | (((rel_value >> 7) & 0x1ff) << 27) /* imm9d */
3716 | (((rel_value >> 16) & 0x01f) << 22) /* imm5c */
3717 | ((Elf64_Xword)(rel_value < 0) << 36); /* s */
3718 ia64_deposit_instruction((Elf64_Xword *)target, instruction);
3722 ia64_reloc_pcrel21(Elf_Addr target, Elf_Addr value, ObjectCode *oc)
3724 Elf64_Xword instruction;
3725 Elf64_Sxword rel_value;
3728 entry = allocatePLTEntry(value, oc);
3730 rel_value = (entry >> 4) - (target >> 4);
3731 if ((rel_value > 0xfffff) || (rel_value < -0xfffff))
3732 barf("PLT entry too far away (entry = 0x%lx, target = 0x%lx)", entry, target);
3734 instruction = ia64_extract_instruction((Elf64_Xword *)target);
3735 instruction |= ((rel_value & 0xfffff) << 13) /* imm20b */
3736 | ((Elf64_Xword)(rel_value < 0) << 36); /* s */
3737 ia64_deposit_instruction((Elf64_Xword *)target, instruction);
3743 * PowerPC & X86_64 ELF specifics
3746 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
3748 static int ocAllocateSymbolExtras_ELF( ObjectCode *oc )
3754 ehdr = (Elf_Ehdr *) oc->image;
3755 shdr = (Elf_Shdr *) ( ((char *)oc->image) + ehdr->e_shoff );
3757 for( i = 0; i < ehdr->e_shnum; i++ )
3758 if( shdr[i].sh_type == SHT_SYMTAB )
3761 if( i == ehdr->e_shnum )
3763 errorBelch( "This ELF file contains no symtab" );
3767 if( shdr[i].sh_entsize != sizeof( Elf_Sym ) )
3769 errorBelch( "The entry size (%d) of the symtab isn't %d\n",
3770 (int) shdr[i].sh_entsize, (int) sizeof( Elf_Sym ) );
3775 return ocAllocateSymbolExtras( oc, shdr[i].sh_size / sizeof( Elf_Sym ), 0 );
3778 #endif /* powerpc */
3782 /* --------------------------------------------------------------------------
3784 * ------------------------------------------------------------------------*/
3786 #if defined(OBJFORMAT_MACHO)
3789 Support for MachO linking on Darwin/MacOS X
3790 by Wolfgang Thaller (wolfgang.thaller@gmx.net)
3792 I hereby formally apologize for the hackish nature of this code.
3793 Things that need to be done:
3794 *) implement ocVerifyImage_MachO
3795 *) add still more sanity checks.
3798 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
3799 #define mach_header mach_header_64
3800 #define segment_command segment_command_64
3801 #define section section_64
3802 #define nlist nlist_64
3805 #ifdef powerpc_HOST_ARCH
3806 static int ocAllocateSymbolExtras_MachO(ObjectCode* oc)
3808 struct mach_header *header = (struct mach_header *) oc->image;
3809 struct load_command *lc = (struct load_command *) (header + 1);
3812 for( i = 0; i < header->ncmds; i++ )
3814 if( lc->cmd == LC_SYMTAB )
3816 // Find out the first and last undefined external
3817 // symbol, so we don't have to allocate too many
3819 struct symtab_command *symLC = (struct symtab_command *) lc;
3820 unsigned min = symLC->nsyms, max = 0;
3821 struct nlist *nlist =
3822 symLC ? (struct nlist*) ((char*) oc->image + symLC->symoff)
3824 for(i=0;i<symLC->nsyms;i++)
3826 if(nlist[i].n_type & N_STAB)
3828 else if(nlist[i].n_type & N_EXT)
3830 if((nlist[i].n_type & N_TYPE) == N_UNDF
3831 && (nlist[i].n_value == 0))
3841 return ocAllocateSymbolExtras(oc, max - min + 1, min);
3846 lc = (struct load_command *) ( ((char *)lc) + lc->cmdsize );
3848 return ocAllocateSymbolExtras(oc,0,0);
3851 #ifdef x86_64_HOST_ARCH
3852 static int ocAllocateSymbolExtras_MachO(ObjectCode* oc)
3854 struct mach_header *header = (struct mach_header *) oc->image;
3855 struct load_command *lc = (struct load_command *) (header + 1);
3858 for( i = 0; i < header->ncmds; i++ )
3860 if( lc->cmd == LC_SYMTAB )
3862 // Just allocate one entry for every symbol
3863 struct symtab_command *symLC = (struct symtab_command *) lc;
3865 return ocAllocateSymbolExtras(oc, symLC->nsyms, 0);
3868 lc = (struct load_command *) ( ((char *)lc) + lc->cmdsize );
3870 return ocAllocateSymbolExtras(oc,0,0);
3874 static int ocVerifyImage_MachO(ObjectCode* oc)
3876 char *image = (char*) oc->image;
3877 struct mach_header *header = (struct mach_header*) image;
3879 #if x86_64_TARGET_ARCH || powerpc64_TARGET_ARCH
3880 if(header->magic != MH_MAGIC_64)
3883 if(header->magic != MH_MAGIC)
3886 // FIXME: do some more verifying here
3890 static int resolveImports(
3893 struct symtab_command *symLC,
3894 struct section *sect, // ptr to lazy or non-lazy symbol pointer section
3895 unsigned long *indirectSyms,
3896 struct nlist *nlist)
3899 size_t itemSize = 4;
3902 int isJumpTable = 0;
3903 if(!strcmp(sect->sectname,"__jump_table"))
3907 ASSERT(sect->reserved2 == itemSize);
3911 for(i=0; i*itemSize < sect->size;i++)
3913 // according to otool, reserved1 contains the first index into the indirect symbol table
3914 struct nlist *symbol = &nlist[indirectSyms[sect->reserved1+i]];
3915 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
3918 if((symbol->n_type & N_TYPE) == N_UNDF
3919 && (symbol->n_type & N_EXT) && (symbol->n_value != 0))
3920 addr = (void*) (symbol->n_value);
3922 addr = lookupSymbol(nm);
3925 errorBelch("\n%s: unknown symbol `%s'", oc->fileName, nm);
3933 checkProddableBlock(oc,image + sect->offset + i*itemSize);
3934 *(image + sect->offset + i*itemSize) = 0xe9; // jmp
3935 *(unsigned*)(image + sect->offset + i*itemSize + 1)
3936 = (char*)addr - (image + sect->offset + i*itemSize + 5);
3941 checkProddableBlock(oc,((void**)(image + sect->offset)) + i);
3942 ((void**)(image + sect->offset))[i] = addr;
3949 static unsigned long relocateAddress(
3952 struct section* sections,
3953 unsigned long address)
3956 for(i = 0; i < nSections; i++)
3958 if(sections[i].addr <= address
3959 && address < sections[i].addr + sections[i].size)
3961 return (unsigned long)oc->image
3962 + sections[i].offset + address - sections[i].addr;
3965 barf("Invalid Mach-O file:"
3966 "Address out of bounds while relocating object file");
3970 static int relocateSection(
3973 struct symtab_command *symLC, struct nlist *nlist,
3974 int nSections, struct section* sections, struct section *sect)
3976 struct relocation_info *relocs;
3979 if(!strcmp(sect->sectname,"__la_symbol_ptr"))
3981 else if(!strcmp(sect->sectname,"__nl_symbol_ptr"))
3983 else if(!strcmp(sect->sectname,"__la_sym_ptr2"))
3985 else if(!strcmp(sect->sectname,"__la_sym_ptr3"))
3989 relocs = (struct relocation_info*) (image + sect->reloff);
3993 #ifdef x86_64_HOST_ARCH
3994 struct relocation_info *reloc = &relocs[i];
3996 char *thingPtr = image + sect->offset + reloc->r_address;
4000 int type = reloc->r_type;
4002 checkProddableBlock(oc,thingPtr);
4003 switch(reloc->r_length)
4006 thing = *(uint8_t*)thingPtr;
4007 baseValue = (uint64_t)thingPtr + 1;
4010 thing = *(uint16_t*)thingPtr;
4011 baseValue = (uint64_t)thingPtr + 2;
4014 thing = *(uint32_t*)thingPtr;
4015 baseValue = (uint64_t)thingPtr + 4;
4018 thing = *(uint64_t*)thingPtr;
4019 baseValue = (uint64_t)thingPtr + 8;
4022 barf("Unknown size.");
4025 if(type == X86_64_RELOC_GOT
4026 || type == X86_64_RELOC_GOT_LOAD)
4028 ASSERT(reloc->r_extern);
4029 value = (uint64_t) &makeSymbolExtra(oc, reloc->r_symbolnum, value)->addr;
4031 type = X86_64_RELOC_SIGNED;
4033 else if(reloc->r_extern)
4035 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4036 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4037 if(symbol->n_value == 0)
4038 value = (uint64_t) lookupSymbol(nm);
4040 value = relocateAddress(oc, nSections, sections,
4045 value = sections[reloc->r_symbolnum-1].offset
4046 - sections[reloc->r_symbolnum-1].addr
4050 if(type == X86_64_RELOC_BRANCH)
4052 if((int32_t)(value - baseValue) != (int64_t)(value - baseValue))
4054 ASSERT(reloc->r_extern);
4055 value = (uint64_t) &makeSymbolExtra(oc, reloc->r_symbolnum, value)
4058 ASSERT((int32_t)(value - baseValue) == (int64_t)(value - baseValue));
4059 type = X86_64_RELOC_SIGNED;
4064 case X86_64_RELOC_UNSIGNED:
4065 ASSERT(!reloc->r_pcrel);
4068 case X86_64_RELOC_SIGNED:
4069 ASSERT(reloc->r_pcrel);
4070 thing += value - baseValue;
4072 case X86_64_RELOC_SUBTRACTOR:
4073 ASSERT(!reloc->r_pcrel);
4077 barf("unkown relocation");
4080 switch(reloc->r_length)
4083 *(uint8_t*)thingPtr = thing;
4086 *(uint16_t*)thingPtr = thing;
4089 *(uint32_t*)thingPtr = thing;
4092 *(uint64_t*)thingPtr = thing;
4096 if(relocs[i].r_address & R_SCATTERED)
4098 struct scattered_relocation_info *scat =
4099 (struct scattered_relocation_info*) &relocs[i];
4103 if(scat->r_length == 2)
4105 unsigned long word = 0;
4106 unsigned long* wordPtr = (unsigned long*) (image + sect->offset + scat->r_address);
4107 checkProddableBlock(oc,wordPtr);
4109 // Note on relocation types:
4110 // i386 uses the GENERIC_RELOC_* types,
4111 // while ppc uses special PPC_RELOC_* types.
4112 // *_RELOC_VANILLA and *_RELOC_PAIR have the same value
4113 // in both cases, all others are different.
4114 // Therefore, we use GENERIC_RELOC_VANILLA
4115 // and GENERIC_RELOC_PAIR instead of the PPC variants,
4116 // and use #ifdefs for the other types.
4118 // Step 1: Figure out what the relocated value should be
4119 if(scat->r_type == GENERIC_RELOC_VANILLA)
4121 word = *wordPtr + (unsigned long) relocateAddress(
4128 #ifdef powerpc_HOST_ARCH
4129 else if(scat->r_type == PPC_RELOC_SECTDIFF
4130 || scat->r_type == PPC_RELOC_LO16_SECTDIFF
4131 || scat->r_type == PPC_RELOC_HI16_SECTDIFF
4132 || scat->r_type == PPC_RELOC_HA16_SECTDIFF)
4134 else if(scat->r_type == GENERIC_RELOC_SECTDIFF)
4137 struct scattered_relocation_info *pair =
4138 (struct scattered_relocation_info*) &relocs[i+1];
4140 if(!pair->r_scattered || pair->r_type != GENERIC_RELOC_PAIR)
4141 barf("Invalid Mach-O file: "
4142 "RELOC_*_SECTDIFF not followed by RELOC_PAIR");
4144 word = (unsigned long)
4145 (relocateAddress(oc, nSections, sections, scat->r_value)
4146 - relocateAddress(oc, nSections, sections, pair->r_value));
4149 #ifdef powerpc_HOST_ARCH
4150 else if(scat->r_type == PPC_RELOC_HI16
4151 || scat->r_type == PPC_RELOC_LO16
4152 || scat->r_type == PPC_RELOC_HA16
4153 || scat->r_type == PPC_RELOC_LO14)
4154 { // these are generated by label+offset things
4155 struct relocation_info *pair = &relocs[i+1];
4156 if((pair->r_address & R_SCATTERED) || pair->r_type != PPC_RELOC_PAIR)
4157 barf("Invalid Mach-O file: "
4158 "PPC_RELOC_* not followed by PPC_RELOC_PAIR");
4160 if(scat->r_type == PPC_RELOC_LO16)
4162 word = ((unsigned short*) wordPtr)[1];
4163 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4165 else if(scat->r_type == PPC_RELOC_LO14)
4167 barf("Unsupported Relocation: PPC_RELOC_LO14");
4168 word = ((unsigned short*) wordPtr)[1] & 0xFFFC;
4169 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4171 else if(scat->r_type == PPC_RELOC_HI16)
4173 word = ((unsigned short*) wordPtr)[1] << 16;
4174 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF);
4176 else if(scat->r_type == PPC_RELOC_HA16)
4178 word = ((unsigned short*) wordPtr)[1] << 16;
4179 word += ((short)relocs[i+1].r_address & (short)0xFFFF);
4183 word += (unsigned long) relocateAddress(oc, nSections, sections, scat->r_value)
4190 continue; // ignore the others
4192 #ifdef powerpc_HOST_ARCH
4193 if(scat->r_type == GENERIC_RELOC_VANILLA
4194 || scat->r_type == PPC_RELOC_SECTDIFF)
4196 if(scat->r_type == GENERIC_RELOC_VANILLA
4197 || scat->r_type == GENERIC_RELOC_SECTDIFF)
4202 #ifdef powerpc_HOST_ARCH
4203 else if(scat->r_type == PPC_RELOC_LO16_SECTDIFF || scat->r_type == PPC_RELOC_LO16)
4205 ((unsigned short*) wordPtr)[1] = word & 0xFFFF;
4207 else if(scat->r_type == PPC_RELOC_HI16_SECTDIFF || scat->r_type == PPC_RELOC_HI16)
4209 ((unsigned short*) wordPtr)[1] = (word >> 16) & 0xFFFF;
4211 else if(scat->r_type == PPC_RELOC_HA16_SECTDIFF || scat->r_type == PPC_RELOC_HA16)
4213 ((unsigned short*) wordPtr)[1] = ((word >> 16) & 0xFFFF)
4214 + ((word & (1<<15)) ? 1 : 0);
4220 continue; // FIXME: I hope it's OK to ignore all the others.
4224 struct relocation_info *reloc = &relocs[i];
4225 if(reloc->r_pcrel && !reloc->r_extern)
4228 if(reloc->r_length == 2)
4230 unsigned long word = 0;
4231 #ifdef powerpc_HOST_ARCH
4232 unsigned long jumpIsland = 0;
4233 long offsetToJumpIsland = 0xBADBAD42; // initialise to bad value
4234 // to avoid warning and to catch
4238 unsigned long* wordPtr = (unsigned long*) (image + sect->offset + reloc->r_address);
4239 checkProddableBlock(oc,wordPtr);
4241 if(reloc->r_type == GENERIC_RELOC_VANILLA)
4245 #ifdef powerpc_HOST_ARCH
4246 else if(reloc->r_type == PPC_RELOC_LO16)
4248 word = ((unsigned short*) wordPtr)[1];
4249 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4251 else if(reloc->r_type == PPC_RELOC_HI16)
4253 word = ((unsigned short*) wordPtr)[1] << 16;
4254 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF);
4256 else if(reloc->r_type == PPC_RELOC_HA16)
4258 word = ((unsigned short*) wordPtr)[1] << 16;
4259 word += ((short)relocs[i+1].r_address & (short)0xFFFF);
4261 else if(reloc->r_type == PPC_RELOC_BR24)
4264 word = (word & 0x03FFFFFC) | ((word & 0x02000000) ? 0xFC000000 : 0);
4268 if(!reloc->r_extern)
4271 sections[reloc->r_symbolnum-1].offset
4272 - sections[reloc->r_symbolnum-1].addr
4279 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4280 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4281 void *symbolAddress = lookupSymbol(nm);
4284 errorBelch("\nunknown symbol `%s'", nm);
4290 #ifdef powerpc_HOST_ARCH
4291 // In the .o file, this should be a relative jump to NULL
4292 // and we'll change it to a relative jump to the symbol
4293 ASSERT(word + reloc->r_address == 0);
4294 jumpIsland = (unsigned long)
4295 &makeSymbolExtra(oc,
4297 (unsigned long) symbolAddress)
4301 offsetToJumpIsland = word + jumpIsland
4302 - (((long)image) + sect->offset - sect->addr);
4305 word += (unsigned long) symbolAddress
4306 - (((long)image) + sect->offset - sect->addr);
4310 word += (unsigned long) symbolAddress;
4314 if(reloc->r_type == GENERIC_RELOC_VANILLA)
4319 #ifdef powerpc_HOST_ARCH
4320 else if(reloc->r_type == PPC_RELOC_LO16)
4322 ((unsigned short*) wordPtr)[1] = word & 0xFFFF;
4325 else if(reloc->r_type == PPC_RELOC_HI16)
4327 ((unsigned short*) wordPtr)[1] = (word >> 16) & 0xFFFF;
4330 else if(reloc->r_type == PPC_RELOC_HA16)
4332 ((unsigned short*) wordPtr)[1] = ((word >> 16) & 0xFFFF)
4333 + ((word & (1<<15)) ? 1 : 0);
4336 else if(reloc->r_type == PPC_RELOC_BR24)
4338 if((long)word > (long)0x01FFFFFF || (long)word < (long)0xFFE00000)
4340 // The branch offset is too large.
4341 // Therefore, we try to use a jump island.
4344 barf("unconditional relative branch out of range: "
4345 "no jump island available");
4348 word = offsetToJumpIsland;
4349 if((long)word > (long)0x01FFFFFF || (long)word < (long)0xFFE00000)
4350 barf("unconditional relative branch out of range: "
4351 "jump island out of range");
4353 *wordPtr = (*wordPtr & 0xFC000003) | (word & 0x03FFFFFC);
4358 barf("\nunknown relocation %d",reloc->r_type);
4366 static int ocGetNames_MachO(ObjectCode* oc)
4368 char *image = (char*) oc->image;
4369 struct mach_header *header = (struct mach_header*) image;
4370 struct load_command *lc = (struct load_command*) (image + sizeof(struct mach_header));
4371 unsigned i,curSymbol = 0;
4372 struct segment_command *segLC = NULL;
4373 struct section *sections;
4374 struct symtab_command *symLC = NULL;
4375 struct nlist *nlist;
4376 unsigned long commonSize = 0;
4377 char *commonStorage = NULL;
4378 unsigned long commonCounter;
4380 for(i=0;i<header->ncmds;i++)
4382 if(lc->cmd == LC_SEGMENT || lc->cmd == LC_SEGMENT_64)
4383 segLC = (struct segment_command*) lc;
4384 else if(lc->cmd == LC_SYMTAB)
4385 symLC = (struct symtab_command*) lc;
4386 lc = (struct load_command *) ( ((char*)lc) + lc->cmdsize );
4389 sections = (struct section*) (segLC+1);
4390 nlist = symLC ? (struct nlist*) (image + symLC->symoff)
4394 barf("ocGetNames_MachO: no segment load command");
4396 for(i=0;i<segLC->nsects;i++)
4398 if(sections[i].size == 0)
4401 if((sections[i].flags & SECTION_TYPE) == S_ZEROFILL)
4403 char * zeroFillArea = stgCallocBytes(1,sections[i].size,
4404 "ocGetNames_MachO(common symbols)");
4405 sections[i].offset = zeroFillArea - image;
4408 if(!strcmp(sections[i].sectname,"__text"))
4409 addSection(oc, SECTIONKIND_CODE_OR_RODATA,
4410 (void*) (image + sections[i].offset),
4411 (void*) (image + sections[i].offset + sections[i].size));
4412 else if(!strcmp(sections[i].sectname,"__const"))
4413 addSection(oc, SECTIONKIND_RWDATA,
4414 (void*) (image + sections[i].offset),
4415 (void*) (image + sections[i].offset + sections[i].size));
4416 else if(!strcmp(sections[i].sectname,"__data"))
4417 addSection(oc, SECTIONKIND_RWDATA,
4418 (void*) (image + sections[i].offset),
4419 (void*) (image + sections[i].offset + sections[i].size));
4420 else if(!strcmp(sections[i].sectname,"__bss")
4421 || !strcmp(sections[i].sectname,"__common"))
4422 addSection(oc, SECTIONKIND_RWDATA,
4423 (void*) (image + sections[i].offset),
4424 (void*) (image + sections[i].offset + sections[i].size));
4426 addProddableBlock(oc, (void*) (image + sections[i].offset),
4430 // count external symbols defined here
4434 for(i=0;i<symLC->nsyms;i++)
4436 if(nlist[i].n_type & N_STAB)
4438 else if(nlist[i].n_type & N_EXT)
4440 if((nlist[i].n_type & N_TYPE) == N_UNDF
4441 && (nlist[i].n_value != 0))
4443 commonSize += nlist[i].n_value;
4446 else if((nlist[i].n_type & N_TYPE) == N_SECT)
4451 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
4452 "ocGetNames_MachO(oc->symbols)");
4456 for(i=0;i<symLC->nsyms;i++)
4458 if(nlist[i].n_type & N_STAB)
4460 else if((nlist[i].n_type & N_TYPE) == N_SECT)
4462 if(nlist[i].n_type & N_EXT)
4464 char *nm = image + symLC->stroff + nlist[i].n_un.n_strx;
4465 if((nlist[i].n_desc & N_WEAK_DEF) && lookupSymbol(nm))
4466 ; // weak definition, and we already have a definition
4469 ghciInsertStrHashTable(oc->fileName, symhash, nm,
4471 + sections[nlist[i].n_sect-1].offset
4472 - sections[nlist[i].n_sect-1].addr
4473 + nlist[i].n_value);
4474 oc->symbols[curSymbol++] = nm;
4481 commonStorage = stgCallocBytes(1,commonSize,"ocGetNames_MachO(common symbols)");
4482 commonCounter = (unsigned long)commonStorage;
4485 for(i=0;i<symLC->nsyms;i++)
4487 if((nlist[i].n_type & N_TYPE) == N_UNDF
4488 && (nlist[i].n_type & N_EXT) && (nlist[i].n_value != 0))
4490 char *nm = image + symLC->stroff + nlist[i].n_un.n_strx;
4491 unsigned long sz = nlist[i].n_value;
4493 nlist[i].n_value = commonCounter;
4495 ghciInsertStrHashTable(oc->fileName, symhash, nm,
4496 (void*)commonCounter);
4497 oc->symbols[curSymbol++] = nm;
4499 commonCounter += sz;
4506 static int ocResolve_MachO(ObjectCode* oc)
4508 char *image = (char*) oc->image;
4509 struct mach_header *header = (struct mach_header*) image;
4510 struct load_command *lc = (struct load_command*) (image + sizeof(struct mach_header));
4512 struct segment_command *segLC = NULL;
4513 struct section *sections;
4514 struct symtab_command *symLC = NULL;
4515 struct dysymtab_command *dsymLC = NULL;
4516 struct nlist *nlist;
4518 for(i=0;i<header->ncmds;i++)
4520 if(lc->cmd == LC_SEGMENT || lc->cmd == LC_SEGMENT_64)
4521 segLC = (struct segment_command*) lc;
4522 else if(lc->cmd == LC_SYMTAB)
4523 symLC = (struct symtab_command*) lc;
4524 else if(lc->cmd == LC_DYSYMTAB)
4525 dsymLC = (struct dysymtab_command*) lc;
4526 lc = (struct load_command *) ( ((char*)lc) + lc->cmdsize );
4529 sections = (struct section*) (segLC+1);
4530 nlist = symLC ? (struct nlist*) (image + symLC->symoff)
4535 unsigned long *indirectSyms
4536 = (unsigned long*) (image + dsymLC->indirectsymoff);
4538 for(i=0;i<segLC->nsects;i++)
4540 if( !strcmp(sections[i].sectname,"__la_symbol_ptr")
4541 || !strcmp(sections[i].sectname,"__la_sym_ptr2")
4542 || !strcmp(sections[i].sectname,"__la_sym_ptr3"))
4544 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
4547 else if(!strcmp(sections[i].sectname,"__nl_symbol_ptr")
4548 || !strcmp(sections[i].sectname,"__pointers"))
4550 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
4553 else if(!strcmp(sections[i].sectname,"__jump_table"))
4555 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
4561 for(i=0;i<segLC->nsects;i++)
4563 if(!relocateSection(oc,image,symLC,nlist,segLC->nsects,sections,§ions[i]))
4567 #if defined (powerpc_HOST_ARCH)
4568 ocFlushInstructionCache( oc );
4574 #ifdef powerpc_HOST_ARCH
4576 * The Mach-O object format uses leading underscores. But not everywhere.
4577 * There is a small number of runtime support functions defined in
4578 * libcc_dynamic.a whose name does not have a leading underscore.
4579 * As a consequence, we can't get their address from C code.
4580 * We have to use inline assembler just to take the address of a function.
4584 static void machoInitSymbolsWithoutUnderscore()
4586 extern void* symbolsWithoutUnderscore[];
4587 void **p = symbolsWithoutUnderscore;
4588 __asm__ volatile(".globl _symbolsWithoutUnderscore\n.data\n_symbolsWithoutUnderscore:");
4591 #define SymI_NeedsProto(x) \
4592 __asm__ volatile(".long " # x);
4594 RTS_MACHO_NOUNDERLINE_SYMBOLS
4596 __asm__ volatile(".text");
4599 #define SymI_NeedsProto(x) \
4600 ghciInsertStrHashTable("(GHCi built-in symbols)", symhash, #x, *p++);
4602 RTS_MACHO_NOUNDERLINE_SYMBOLS
4609 * Figure out by how much to shift the entire Mach-O file in memory
4610 * when loading so that its single segment ends up 16-byte-aligned
4612 static int machoGetMisalignment( FILE * f )
4614 struct mach_header header;
4617 fread(&header, sizeof(header), 1, f);
4620 #if x86_64_TARGET_ARCH || powerpc64_TARGET_ARCH
4621 if(header.magic != MH_MAGIC_64)
4624 if(header.magic != MH_MAGIC)
4628 misalignment = (header.sizeofcmds + sizeof(header))
4631 return misalignment ? (16 - misalignment) : 0;