1 /* -----------------------------------------------------------------------------
3 * (c) The GHC Team, 2000-2004
7 * ---------------------------------------------------------------------------*/
10 #include "PosixSource.h"
13 /* Linux needs _GNU_SOURCE to get RTLD_DEFAULT from <dlfcn.h> and
14 MREMAP_MAYMOVE from <sys/mman.h>.
23 #include "sm/Storage.h"
25 #include "LinkerInternals.h"
28 #include "StgPrimFloat.h" // for __int_encodeFloat etc.
31 #if !defined(mingw32_HOST_OS)
32 #include "posix/Signals.h"
35 #ifdef HAVE_SYS_TYPES_H
36 #include <sys/types.h>
42 #ifdef HAVE_SYS_STAT_H
46 #if defined(HAVE_DLFCN_H)
50 #if defined(cygwin32_HOST_OS)
55 #ifdef HAVE_SYS_TIME_H
59 #include <sys/fcntl.h>
60 #include <sys/termios.h>
61 #include <sys/utime.h>
62 #include <sys/utsname.h>
66 #if defined(ia64_HOST_ARCH) || defined(linux_HOST_OS) || defined(freebsd_HOST_OS) || defined(netbsd_HOST_OS) || defined(openbsd_HOST_OS)
71 #if defined(linux_HOST_OS) || defined(freebsd_HOST_OS) || defined(netbsd_HOST_OS) || defined(openbsd_HOST_OS)
79 #if defined(linux_HOST_OS) || defined(solaris2_HOST_OS) || defined(freebsd_HOST_OS) || defined(netbsd_HOST_OS) || defined(openbsd_HOST_OS)
80 # define OBJFORMAT_ELF
81 #elif defined(cygwin32_HOST_OS) || defined (mingw32_HOST_OS)
82 # define OBJFORMAT_PEi386
85 #elif defined(darwin_HOST_OS)
86 # define OBJFORMAT_MACHO
87 # include <mach-o/loader.h>
88 # include <mach-o/nlist.h>
89 # include <mach-o/reloc.h>
90 #if !defined(HAVE_DLFCN_H)
91 # include <mach-o/dyld.h>
93 #if defined(powerpc_HOST_ARCH)
94 # include <mach-o/ppc/reloc.h>
96 #if defined(x86_64_HOST_ARCH)
97 # include <mach-o/x86_64/reloc.h>
101 /* Hash table mapping symbol names to Symbol */
102 static /*Str*/HashTable *symhash;
104 /* Hash table mapping symbol names to StgStablePtr */
105 static /*Str*/HashTable *stablehash;
107 /* List of currently loaded objects */
108 ObjectCode *objects = NULL; /* initially empty */
110 #if defined(OBJFORMAT_ELF)
111 static int ocVerifyImage_ELF ( ObjectCode* oc );
112 static int ocGetNames_ELF ( ObjectCode* oc );
113 static int ocResolve_ELF ( ObjectCode* oc );
114 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
115 static int ocAllocateSymbolExtras_ELF ( ObjectCode* oc );
117 #elif defined(OBJFORMAT_PEi386)
118 static int ocVerifyImage_PEi386 ( ObjectCode* oc );
119 static int ocGetNames_PEi386 ( ObjectCode* oc );
120 static int ocResolve_PEi386 ( ObjectCode* oc );
121 static void *lookupSymbolInDLLs ( unsigned char *lbl );
122 static void zapTrailingAtSign ( unsigned char *sym );
123 #elif defined(OBJFORMAT_MACHO)
124 static int ocVerifyImage_MachO ( ObjectCode* oc );
125 static int ocGetNames_MachO ( ObjectCode* oc );
126 static int ocResolve_MachO ( ObjectCode* oc );
128 static int machoGetMisalignment( FILE * );
129 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
130 static int ocAllocateSymbolExtras_MachO ( ObjectCode* oc );
132 #ifdef powerpc_HOST_ARCH
133 static void machoInitSymbolsWithoutUnderscore( void );
137 /* on x86_64 we have a problem with relocating symbol references in
138 * code that was compiled without -fPIC. By default, the small memory
139 * model is used, which assumes that symbol references can fit in a
140 * 32-bit slot. The system dynamic linker makes this work for
141 * references to shared libraries by either (a) allocating a jump
142 * table slot for code references, or (b) moving the symbol at load
143 * time (and copying its contents, if necessary) for data references.
145 * We unfortunately can't tell whether symbol references are to code
146 * or data. So for now we assume they are code (the vast majority
147 * are), and allocate jump-table slots. Unfortunately this will
148 * SILENTLY generate crashing code for data references. This hack is
149 * enabled by X86_64_ELF_NONPIC_HACK.
151 * One workaround is to use shared Haskell libraries. This is
152 * coming. Another workaround is to keep the static libraries but
153 * compile them with -fPIC, because that will generate PIC references
154 * to data which can be relocated. The PIC code is still too green to
155 * do this systematically, though.
158 * See thread http://www.haskell.org/pipermail/cvs-ghc/2007-September/038458.html
160 * Naming Scheme for Symbol Macros
162 * SymI_*: symbol is internal to the RTS. It resides in an object
163 * file/library that is statically.
164 * SymE_*: symbol is external to the RTS library. It might be linked
167 * Sym*_HasProto : the symbol prototype is imported in an include file
168 * or defined explicitly
169 * Sym*_NeedsProto: the symbol is undefined and we add a dummy
170 * default proto extern void sym(void);
172 #define X86_64_ELF_NONPIC_HACK 1
174 /* Link objects into the lower 2Gb on x86_64. GHC assumes the
175 * small memory model on this architecture (see gcc docs,
178 * MAP_32BIT not available on OpenBSD/amd64
180 #if defined(x86_64_HOST_ARCH) && defined(MAP_32BIT)
181 #define TRY_MAP_32BIT MAP_32BIT
183 #define TRY_MAP_32BIT 0
187 * Due to the small memory model (see above), on x86_64 we have to map
188 * all our non-PIC object files into the low 2Gb of the address space
189 * (why 2Gb and not 4Gb? Because all addresses must be reachable
190 * using a 32-bit signed PC-relative offset). On Linux we can do this
191 * using the MAP_32BIT flag to mmap(), however on other OSs
192 * (e.g. *BSD, see #2063, and also on Linux inside Xen, see #2512), we
193 * can't do this. So on these systems, we have to pick a base address
194 * in the low 2Gb of the address space and try to allocate memory from
197 * We pick a default address based on the OS, but also make this
198 * configurable via an RTS flag (+RTS -xm)
200 #if defined(x86_64_HOST_ARCH)
202 #if defined(MAP_32BIT)
203 // Try to use MAP_32BIT
204 #define MMAP_32BIT_BASE_DEFAULT 0
207 #define MMAP_32BIT_BASE_DEFAULT 0x40000000
210 static void *mmap_32bit_base = (void *)MMAP_32BIT_BASE_DEFAULT;
213 /* MAP_ANONYMOUS is MAP_ANON on some systems, e.g. OpenBSD */
214 #if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
215 #define MAP_ANONYMOUS MAP_ANON
218 /* -----------------------------------------------------------------------------
219 * Built-in symbols from the RTS
222 typedef struct _RtsSymbolVal {
227 #define Maybe_Stable_Names SymI_HasProto(stg_mkWeakzh) \
228 SymI_HasProto(stg_mkWeakForeignEnvzh) \
229 SymI_HasProto(stg_makeStableNamezh) \
230 SymI_HasProto(stg_finalizzeWeakzh)
232 #if !defined (mingw32_HOST_OS)
233 #define RTS_POSIX_ONLY_SYMBOLS \
234 SymI_HasProto(__hscore_get_saved_termios) \
235 SymI_HasProto(__hscore_set_saved_termios) \
236 SymI_HasProto(shutdownHaskellAndSignal) \
237 SymI_HasProto(lockFile) \
238 SymI_HasProto(unlockFile) \
239 SymI_HasProto(signal_handlers) \
240 SymI_HasProto(stg_sig_install) \
241 SymI_NeedsProto(nocldstop)
244 #if defined (cygwin32_HOST_OS)
245 #define RTS_MINGW_ONLY_SYMBOLS /**/
246 /* Don't have the ability to read import libs / archives, so
247 * we have to stupidly list a lot of what libcygwin.a
250 #define RTS_CYGWIN_ONLY_SYMBOLS \
251 SymI_HasProto(regfree) \
252 SymI_HasProto(regexec) \
253 SymI_HasProto(regerror) \
254 SymI_HasProto(regcomp) \
255 SymI_HasProto(__errno) \
256 SymI_HasProto(access) \
257 SymI_HasProto(chmod) \
258 SymI_HasProto(chdir) \
259 SymI_HasProto(close) \
260 SymI_HasProto(creat) \
262 SymI_HasProto(dup2) \
263 SymI_HasProto(fstat) \
264 SymI_HasProto(fcntl) \
265 SymI_HasProto(getcwd) \
266 SymI_HasProto(getenv) \
267 SymI_HasProto(lseek) \
268 SymI_HasProto(open) \
269 SymI_HasProto(fpathconf) \
270 SymI_HasProto(pathconf) \
271 SymI_HasProto(stat) \
273 SymI_HasProto(tanh) \
274 SymI_HasProto(cosh) \
275 SymI_HasProto(sinh) \
276 SymI_HasProto(atan) \
277 SymI_HasProto(acos) \
278 SymI_HasProto(asin) \
284 SymI_HasProto(sqrt) \
285 SymI_HasProto(localtime_r) \
286 SymI_HasProto(gmtime_r) \
287 SymI_HasProto(mktime) \
288 SymI_NeedsProto(_imp___tzname) \
289 SymI_HasProto(gettimeofday) \
290 SymI_HasProto(timezone) \
291 SymI_HasProto(tcgetattr) \
292 SymI_HasProto(tcsetattr) \
293 SymI_HasProto(memcpy) \
294 SymI_HasProto(memmove) \
295 SymI_HasProto(realloc) \
296 SymI_HasProto(malloc) \
297 SymI_HasProto(free) \
298 SymI_HasProto(fork) \
299 SymI_HasProto(lstat) \
300 SymI_HasProto(isatty) \
301 SymI_HasProto(mkdir) \
302 SymI_HasProto(opendir) \
303 SymI_HasProto(readdir) \
304 SymI_HasProto(rewinddir) \
305 SymI_HasProto(closedir) \
306 SymI_HasProto(link) \
307 SymI_HasProto(mkfifo) \
308 SymI_HasProto(pipe) \
309 SymI_HasProto(read) \
310 SymI_HasProto(rename) \
311 SymI_HasProto(rmdir) \
312 SymI_HasProto(select) \
313 SymI_HasProto(system) \
314 SymI_HasProto(write) \
315 SymI_HasProto(strcmp) \
316 SymI_HasProto(strcpy) \
317 SymI_HasProto(strncpy) \
318 SymI_HasProto(strerror) \
319 SymI_HasProto(sigaddset) \
320 SymI_HasProto(sigemptyset) \
321 SymI_HasProto(sigprocmask) \
322 SymI_HasProto(umask) \
323 SymI_HasProto(uname) \
324 SymI_HasProto(unlink) \
325 SymI_HasProto(utime) \
326 SymI_HasProto(waitpid)
328 #elif !defined(mingw32_HOST_OS)
329 #define RTS_MINGW_ONLY_SYMBOLS /**/
330 #define RTS_CYGWIN_ONLY_SYMBOLS /**/
331 #else /* defined(mingw32_HOST_OS) */
332 #define RTS_POSIX_ONLY_SYMBOLS /**/
333 #define RTS_CYGWIN_ONLY_SYMBOLS /**/
335 /* Extra syms gen'ed by mingw-2's gcc-3.2: */
337 #define RTS_MINGW_EXTRA_SYMS \
338 SymI_NeedsProto(_imp____mb_cur_max) \
339 SymI_NeedsProto(_imp___pctype)
341 #define RTS_MINGW_EXTRA_SYMS
344 #if HAVE_GETTIMEOFDAY
345 #define RTS_MINGW_GETTIMEOFDAY_SYM SymI_NeedsProto(gettimeofday)
347 #define RTS_MINGW_GETTIMEOFDAY_SYM /**/
350 #if HAVE___MINGW_VFPRINTF
351 #define RTS___MINGW_VFPRINTF_SYM SymI_HasProto(__mingw_vfprintf)
353 #define RTS___MINGW_VFPRINTF_SYM /**/
356 /* These are statically linked from the mingw libraries into the ghc
357 executable, so we have to employ this hack. */
358 #define RTS_MINGW_ONLY_SYMBOLS \
359 SymI_HasProto(stg_asyncReadzh) \
360 SymI_HasProto(stg_asyncWritezh) \
361 SymI_HasProto(stg_asyncDoProczh) \
362 SymI_HasProto(memset) \
363 SymI_HasProto(inet_ntoa) \
364 SymI_HasProto(inet_addr) \
365 SymI_HasProto(htonl) \
366 SymI_HasProto(recvfrom) \
367 SymI_HasProto(listen) \
368 SymI_HasProto(bind) \
369 SymI_HasProto(shutdown) \
370 SymI_HasProto(connect) \
371 SymI_HasProto(htons) \
372 SymI_HasProto(ntohs) \
373 SymI_HasProto(getservbyname) \
374 SymI_HasProto(getservbyport) \
375 SymI_HasProto(getprotobynumber) \
376 SymI_HasProto(getprotobyname) \
377 SymI_HasProto(gethostbyname) \
378 SymI_HasProto(gethostbyaddr) \
379 SymI_HasProto(gethostname) \
380 SymI_HasProto(strcpy) \
381 SymI_HasProto(strncpy) \
382 SymI_HasProto(abort) \
383 SymI_NeedsProto(_alloca) \
384 SymI_NeedsProto(isxdigit) \
385 SymI_NeedsProto(isupper) \
386 SymI_NeedsProto(ispunct) \
387 SymI_NeedsProto(islower) \
388 SymI_NeedsProto(isspace) \
389 SymI_NeedsProto(isprint) \
390 SymI_NeedsProto(isdigit) \
391 SymI_NeedsProto(iscntrl) \
392 SymI_NeedsProto(isalpha) \
393 SymI_NeedsProto(isalnum) \
394 SymI_NeedsProto(isascii) \
395 RTS___MINGW_VFPRINTF_SYM \
396 SymI_HasProto(strcmp) \
397 SymI_HasProto(memmove) \
398 SymI_HasProto(realloc) \
399 SymI_HasProto(malloc) \
401 SymI_HasProto(tanh) \
402 SymI_HasProto(cosh) \
403 SymI_HasProto(sinh) \
404 SymI_HasProto(atan) \
405 SymI_HasProto(acos) \
406 SymI_HasProto(asin) \
412 SymI_HasProto(sqrt) \
413 SymI_HasProto(powf) \
414 SymI_HasProto(tanhf) \
415 SymI_HasProto(coshf) \
416 SymI_HasProto(sinhf) \
417 SymI_HasProto(atanf) \
418 SymI_HasProto(acosf) \
419 SymI_HasProto(asinf) \
420 SymI_HasProto(tanf) \
421 SymI_HasProto(cosf) \
422 SymI_HasProto(sinf) \
423 SymI_HasProto(expf) \
424 SymI_HasProto(logf) \
425 SymI_HasProto(sqrtf) \
426 SymI_HasProto(memcpy) \
427 SymI_HasProto(rts_InstallConsoleEvent) \
428 SymI_HasProto(rts_ConsoleHandlerDone) \
429 SymI_NeedsProto(mktime) \
430 SymI_NeedsProto(_imp___timezone) \
431 SymI_NeedsProto(_imp___tzname) \
432 SymI_NeedsProto(_imp__tzname) \
433 SymI_NeedsProto(_imp___iob) \
434 SymI_NeedsProto(_imp___osver) \
435 SymI_NeedsProto(localtime) \
436 SymI_NeedsProto(gmtime) \
437 SymI_NeedsProto(opendir) \
438 SymI_NeedsProto(readdir) \
439 SymI_NeedsProto(rewinddir) \
440 RTS_MINGW_EXTRA_SYMS \
441 RTS_MINGW_GETTIMEOFDAY_SYM \
442 SymI_NeedsProto(closedir)
445 #if defined(darwin_TARGET_OS) && HAVE_PRINTF_LDBLSTUB
446 #define RTS_DARWIN_ONLY_SYMBOLS \
447 SymI_NeedsProto(asprintf$LDBLStub) \
448 SymI_NeedsProto(err$LDBLStub) \
449 SymI_NeedsProto(errc$LDBLStub) \
450 SymI_NeedsProto(errx$LDBLStub) \
451 SymI_NeedsProto(fprintf$LDBLStub) \
452 SymI_NeedsProto(fscanf$LDBLStub) \
453 SymI_NeedsProto(fwprintf$LDBLStub) \
454 SymI_NeedsProto(fwscanf$LDBLStub) \
455 SymI_NeedsProto(printf$LDBLStub) \
456 SymI_NeedsProto(scanf$LDBLStub) \
457 SymI_NeedsProto(snprintf$LDBLStub) \
458 SymI_NeedsProto(sprintf$LDBLStub) \
459 SymI_NeedsProto(sscanf$LDBLStub) \
460 SymI_NeedsProto(strtold$LDBLStub) \
461 SymI_NeedsProto(swprintf$LDBLStub) \
462 SymI_NeedsProto(swscanf$LDBLStub) \
463 SymI_NeedsProto(syslog$LDBLStub) \
464 SymI_NeedsProto(vasprintf$LDBLStub) \
465 SymI_NeedsProto(verr$LDBLStub) \
466 SymI_NeedsProto(verrc$LDBLStub) \
467 SymI_NeedsProto(verrx$LDBLStub) \
468 SymI_NeedsProto(vfprintf$LDBLStub) \
469 SymI_NeedsProto(vfscanf$LDBLStub) \
470 SymI_NeedsProto(vfwprintf$LDBLStub) \
471 SymI_NeedsProto(vfwscanf$LDBLStub) \
472 SymI_NeedsProto(vprintf$LDBLStub) \
473 SymI_NeedsProto(vscanf$LDBLStub) \
474 SymI_NeedsProto(vsnprintf$LDBLStub) \
475 SymI_NeedsProto(vsprintf$LDBLStub) \
476 SymI_NeedsProto(vsscanf$LDBLStub) \
477 SymI_NeedsProto(vswprintf$LDBLStub) \
478 SymI_NeedsProto(vswscanf$LDBLStub) \
479 SymI_NeedsProto(vsyslog$LDBLStub) \
480 SymI_NeedsProto(vwarn$LDBLStub) \
481 SymI_NeedsProto(vwarnc$LDBLStub) \
482 SymI_NeedsProto(vwarnx$LDBLStub) \
483 SymI_NeedsProto(vwprintf$LDBLStub) \
484 SymI_NeedsProto(vwscanf$LDBLStub) \
485 SymI_NeedsProto(warn$LDBLStub) \
486 SymI_NeedsProto(warnc$LDBLStub) \
487 SymI_NeedsProto(warnx$LDBLStub) \
488 SymI_NeedsProto(wcstold$LDBLStub) \
489 SymI_NeedsProto(wprintf$LDBLStub) \
490 SymI_NeedsProto(wscanf$LDBLStub)
492 #define RTS_DARWIN_ONLY_SYMBOLS
496 # define MAIN_CAP_SYM SymI_HasProto(MainCapability)
498 # define MAIN_CAP_SYM
501 #if !defined(mingw32_HOST_OS)
502 #define RTS_USER_SIGNALS_SYMBOLS \
503 SymI_HasProto(setIOManagerPipe) \
504 SymI_NeedsProto(blockUserSignals) \
505 SymI_NeedsProto(unblockUserSignals)
507 #define RTS_USER_SIGNALS_SYMBOLS \
508 SymI_HasProto(sendIOManagerEvent) \
509 SymI_HasProto(readIOManagerEvent) \
510 SymI_HasProto(getIOManagerEvent) \
511 SymI_HasProto(console_handler)
514 #define RTS_LIBFFI_SYMBOLS \
515 SymE_NeedsProto(ffi_prep_cif) \
516 SymE_NeedsProto(ffi_call) \
517 SymE_NeedsProto(ffi_type_void) \
518 SymE_NeedsProto(ffi_type_float) \
519 SymE_NeedsProto(ffi_type_double) \
520 SymE_NeedsProto(ffi_type_sint64) \
521 SymE_NeedsProto(ffi_type_uint64) \
522 SymE_NeedsProto(ffi_type_sint32) \
523 SymE_NeedsProto(ffi_type_uint32) \
524 SymE_NeedsProto(ffi_type_sint16) \
525 SymE_NeedsProto(ffi_type_uint16) \
526 SymE_NeedsProto(ffi_type_sint8) \
527 SymE_NeedsProto(ffi_type_uint8) \
528 SymE_NeedsProto(ffi_type_pointer)
530 #ifdef TABLES_NEXT_TO_CODE
531 #define RTS_RET_SYMBOLS /* nothing */
533 #define RTS_RET_SYMBOLS \
534 SymI_HasProto(stg_enter_ret) \
535 SymI_HasProto(stg_gc_fun_ret) \
536 SymI_HasProto(stg_ap_v_ret) \
537 SymI_HasProto(stg_ap_f_ret) \
538 SymI_HasProto(stg_ap_d_ret) \
539 SymI_HasProto(stg_ap_l_ret) \
540 SymI_HasProto(stg_ap_n_ret) \
541 SymI_HasProto(stg_ap_p_ret) \
542 SymI_HasProto(stg_ap_pv_ret) \
543 SymI_HasProto(stg_ap_pp_ret) \
544 SymI_HasProto(stg_ap_ppv_ret) \
545 SymI_HasProto(stg_ap_ppp_ret) \
546 SymI_HasProto(stg_ap_pppv_ret) \
547 SymI_HasProto(stg_ap_pppp_ret) \
548 SymI_HasProto(stg_ap_ppppp_ret) \
549 SymI_HasProto(stg_ap_pppppp_ret)
552 #define RTS_SYMBOLS \
554 SymI_HasProto(StgReturn) \
555 SymI_HasProto(stg_enter_info) \
556 SymI_HasProto(stg_gc_void_info) \
557 SymI_HasProto(__stg_gc_enter_1) \
558 SymI_HasProto(stg_gc_noregs) \
559 SymI_HasProto(stg_gc_unpt_r1_info) \
560 SymI_HasProto(stg_gc_unpt_r1) \
561 SymI_HasProto(stg_gc_unbx_r1_info) \
562 SymI_HasProto(stg_gc_unbx_r1) \
563 SymI_HasProto(stg_gc_f1_info) \
564 SymI_HasProto(stg_gc_f1) \
565 SymI_HasProto(stg_gc_d1_info) \
566 SymI_HasProto(stg_gc_d1) \
567 SymI_HasProto(stg_gc_l1_info) \
568 SymI_HasProto(stg_gc_l1) \
569 SymI_HasProto(__stg_gc_fun) \
570 SymI_HasProto(stg_gc_fun_info) \
571 SymI_HasProto(stg_gc_gen) \
572 SymI_HasProto(stg_gc_gen_info) \
573 SymI_HasProto(stg_gc_gen_hp) \
574 SymI_HasProto(stg_gc_ut) \
575 SymI_HasProto(stg_gen_yield) \
576 SymI_HasProto(stg_yield_noregs) \
577 SymI_HasProto(stg_yield_to_interpreter) \
578 SymI_HasProto(stg_gen_block) \
579 SymI_HasProto(stg_block_noregs) \
580 SymI_HasProto(stg_block_1) \
581 SymI_HasProto(stg_block_takemvar) \
582 SymI_HasProto(stg_block_putmvar) \
584 SymI_HasProto(MallocFailHook) \
585 SymI_HasProto(OnExitHook) \
586 SymI_HasProto(OutOfHeapHook) \
587 SymI_HasProto(StackOverflowHook) \
588 SymI_HasProto(addDLL) \
589 SymI_HasProto(__int_encodeDouble) \
590 SymI_HasProto(__word_encodeDouble) \
591 SymI_HasProto(__2Int_encodeDouble) \
592 SymI_HasProto(__int_encodeFloat) \
593 SymI_HasProto(__word_encodeFloat) \
594 SymI_HasProto(stg_atomicallyzh) \
595 SymI_HasProto(barf) \
596 SymI_HasProto(debugBelch) \
597 SymI_HasProto(errorBelch) \
598 SymI_HasProto(sysErrorBelch) \
599 SymI_HasProto(stg_asyncExceptionsBlockedzh) \
600 SymI_HasProto(stg_blockAsyncExceptionszh) \
601 SymI_HasProto(stg_catchzh) \
602 SymI_HasProto(stg_catchRetryzh) \
603 SymI_HasProto(stg_catchSTMzh) \
604 SymI_HasProto(stg_checkzh) \
605 SymI_HasProto(closure_flags) \
606 SymI_HasProto(cmp_thread) \
607 SymI_HasProto(createAdjustor) \
608 SymI_HasProto(stg_decodeDoublezu2Intzh) \
609 SymI_HasProto(stg_decodeFloatzuIntzh) \
610 SymI_HasProto(defaultsHook) \
611 SymI_HasProto(stg_delayzh) \
612 SymI_HasProto(stg_deRefWeakzh) \
613 SymI_HasProto(stg_deRefStablePtrzh) \
614 SymI_HasProto(dirty_MUT_VAR) \
615 SymI_HasProto(stg_forkzh) \
616 SymI_HasProto(stg_forkOnzh) \
617 SymI_HasProto(forkProcess) \
618 SymI_HasProto(forkOS_createThread) \
619 SymI_HasProto(freeHaskellFunctionPtr) \
620 SymI_HasProto(getOrSetTypeableStore) \
621 SymI_HasProto(getOrSetSignalHandlerStore) \
622 SymI_HasProto(genSymZh) \
623 SymI_HasProto(genericRaise) \
624 SymI_HasProto(getProgArgv) \
625 SymI_HasProto(getFullProgArgv) \
626 SymI_HasProto(getStablePtr) \
627 SymI_HasProto(hs_init) \
628 SymI_HasProto(hs_exit) \
629 SymI_HasProto(hs_set_argv) \
630 SymI_HasProto(hs_add_root) \
631 SymI_HasProto(hs_perform_gc) \
632 SymI_HasProto(hs_free_stable_ptr) \
633 SymI_HasProto(hs_free_fun_ptr) \
634 SymI_HasProto(hs_hpc_rootModule) \
635 SymI_HasProto(hs_hpc_module) \
636 SymI_HasProto(initLinker) \
637 SymI_HasProto(stg_unpackClosurezh) \
638 SymI_HasProto(stg_getApStackValzh) \
639 SymI_HasProto(stg_getSparkzh) \
640 SymI_HasProto(stg_isCurrentThreadBoundzh) \
641 SymI_HasProto(stg_isEmptyMVarzh) \
642 SymI_HasProto(stg_killThreadzh) \
643 SymI_HasProto(loadObj) \
644 SymI_HasProto(insertStableSymbol) \
645 SymI_HasProto(insertSymbol) \
646 SymI_HasProto(lookupSymbol) \
647 SymI_HasProto(stg_makeStablePtrzh) \
648 SymI_HasProto(stg_mkApUpd0zh) \
649 SymI_HasProto(stg_myThreadIdzh) \
650 SymI_HasProto(stg_labelThreadzh) \
651 SymI_HasProto(stg_newArrayzh) \
652 SymI_HasProto(stg_newBCOzh) \
653 SymI_HasProto(stg_newByteArrayzh) \
654 SymI_HasProto_redirect(newCAF, newDynCAF) \
655 SymI_HasProto(stg_newMVarzh) \
656 SymI_HasProto(stg_newMutVarzh) \
657 SymI_HasProto(stg_newTVarzh) \
658 SymI_HasProto(stg_noDuplicatezh) \
659 SymI_HasProto(stg_atomicModifyMutVarzh) \
660 SymI_HasProto(stg_newPinnedByteArrayzh) \
661 SymI_HasProto(stg_newAlignedPinnedByteArrayzh) \
662 SymI_HasProto(newSpark) \
663 SymI_HasProto(performGC) \
664 SymI_HasProto(performMajorGC) \
665 SymI_HasProto(prog_argc) \
666 SymI_HasProto(prog_argv) \
667 SymI_HasProto(stg_putMVarzh) \
668 SymI_HasProto(stg_raisezh) \
669 SymI_HasProto(stg_raiseIOzh) \
670 SymI_HasProto(stg_readTVarzh) \
671 SymI_HasProto(stg_readTVarIOzh) \
672 SymI_HasProto(resumeThread) \
673 SymI_HasProto(resolveObjs) \
674 SymI_HasProto(stg_retryzh) \
675 SymI_HasProto(rts_apply) \
676 SymI_HasProto(rts_checkSchedStatus) \
677 SymI_HasProto(rts_eval) \
678 SymI_HasProto(rts_evalIO) \
679 SymI_HasProto(rts_evalLazyIO) \
680 SymI_HasProto(rts_evalStableIO) \
681 SymI_HasProto(rts_eval_) \
682 SymI_HasProto(rts_getBool) \
683 SymI_HasProto(rts_getChar) \
684 SymI_HasProto(rts_getDouble) \
685 SymI_HasProto(rts_getFloat) \
686 SymI_HasProto(rts_getInt) \
687 SymI_HasProto(rts_getInt8) \
688 SymI_HasProto(rts_getInt16) \
689 SymI_HasProto(rts_getInt32) \
690 SymI_HasProto(rts_getInt64) \
691 SymI_HasProto(rts_getPtr) \
692 SymI_HasProto(rts_getFunPtr) \
693 SymI_HasProto(rts_getStablePtr) \
694 SymI_HasProto(rts_getThreadId) \
695 SymI_HasProto(rts_getWord) \
696 SymI_HasProto(rts_getWord8) \
697 SymI_HasProto(rts_getWord16) \
698 SymI_HasProto(rts_getWord32) \
699 SymI_HasProto(rts_getWord64) \
700 SymI_HasProto(rts_lock) \
701 SymI_HasProto(rts_mkBool) \
702 SymI_HasProto(rts_mkChar) \
703 SymI_HasProto(rts_mkDouble) \
704 SymI_HasProto(rts_mkFloat) \
705 SymI_HasProto(rts_mkInt) \
706 SymI_HasProto(rts_mkInt8) \
707 SymI_HasProto(rts_mkInt16) \
708 SymI_HasProto(rts_mkInt32) \
709 SymI_HasProto(rts_mkInt64) \
710 SymI_HasProto(rts_mkPtr) \
711 SymI_HasProto(rts_mkFunPtr) \
712 SymI_HasProto(rts_mkStablePtr) \
713 SymI_HasProto(rts_mkString) \
714 SymI_HasProto(rts_mkWord) \
715 SymI_HasProto(rts_mkWord8) \
716 SymI_HasProto(rts_mkWord16) \
717 SymI_HasProto(rts_mkWord32) \
718 SymI_HasProto(rts_mkWord64) \
719 SymI_HasProto(rts_unlock) \
720 SymI_HasProto(rts_unsafeGetMyCapability) \
721 SymI_HasProto(rtsSupportsBoundThreads) \
722 SymI_HasProto(setProgArgv) \
723 SymI_HasProto(startupHaskell) \
724 SymI_HasProto(shutdownHaskell) \
725 SymI_HasProto(shutdownHaskellAndExit) \
726 SymI_HasProto(stable_ptr_table) \
727 SymI_HasProto(stackOverflow) \
728 SymI_HasProto(stg_CAF_BLACKHOLE_info) \
729 SymI_HasProto(__stg_EAGER_BLACKHOLE_info) \
730 SymI_HasProto(startTimer) \
731 SymI_HasProto(stg_CHARLIKE_closure) \
732 SymI_HasProto(stg_MVAR_CLEAN_info) \
733 SymI_HasProto(stg_MVAR_DIRTY_info) \
734 SymI_HasProto(stg_IND_STATIC_info) \
735 SymI_HasProto(stg_INTLIKE_closure) \
736 SymI_HasProto(stg_ARR_WORDS_info) \
737 SymI_HasProto(stg_MUT_ARR_PTRS_DIRTY_info) \
738 SymI_HasProto(stg_MUT_ARR_PTRS_FROZEN_info) \
739 SymI_HasProto(stg_MUT_ARR_PTRS_FROZEN0_info) \
740 SymI_HasProto(stg_WEAK_info) \
741 SymI_HasProto(stg_ap_v_info) \
742 SymI_HasProto(stg_ap_f_info) \
743 SymI_HasProto(stg_ap_d_info) \
744 SymI_HasProto(stg_ap_l_info) \
745 SymI_HasProto(stg_ap_n_info) \
746 SymI_HasProto(stg_ap_p_info) \
747 SymI_HasProto(stg_ap_pv_info) \
748 SymI_HasProto(stg_ap_pp_info) \
749 SymI_HasProto(stg_ap_ppv_info) \
750 SymI_HasProto(stg_ap_ppp_info) \
751 SymI_HasProto(stg_ap_pppv_info) \
752 SymI_HasProto(stg_ap_pppp_info) \
753 SymI_HasProto(stg_ap_ppppp_info) \
754 SymI_HasProto(stg_ap_pppppp_info) \
755 SymI_HasProto(stg_ap_0_fast) \
756 SymI_HasProto(stg_ap_v_fast) \
757 SymI_HasProto(stg_ap_f_fast) \
758 SymI_HasProto(stg_ap_d_fast) \
759 SymI_HasProto(stg_ap_l_fast) \
760 SymI_HasProto(stg_ap_n_fast) \
761 SymI_HasProto(stg_ap_p_fast) \
762 SymI_HasProto(stg_ap_pv_fast) \
763 SymI_HasProto(stg_ap_pp_fast) \
764 SymI_HasProto(stg_ap_ppv_fast) \
765 SymI_HasProto(stg_ap_ppp_fast) \
766 SymI_HasProto(stg_ap_pppv_fast) \
767 SymI_HasProto(stg_ap_pppp_fast) \
768 SymI_HasProto(stg_ap_ppppp_fast) \
769 SymI_HasProto(stg_ap_pppppp_fast) \
770 SymI_HasProto(stg_ap_1_upd_info) \
771 SymI_HasProto(stg_ap_2_upd_info) \
772 SymI_HasProto(stg_ap_3_upd_info) \
773 SymI_HasProto(stg_ap_4_upd_info) \
774 SymI_HasProto(stg_ap_5_upd_info) \
775 SymI_HasProto(stg_ap_6_upd_info) \
776 SymI_HasProto(stg_ap_7_upd_info) \
777 SymI_HasProto(stg_exit) \
778 SymI_HasProto(stg_sel_0_upd_info) \
779 SymI_HasProto(stg_sel_10_upd_info) \
780 SymI_HasProto(stg_sel_11_upd_info) \
781 SymI_HasProto(stg_sel_12_upd_info) \
782 SymI_HasProto(stg_sel_13_upd_info) \
783 SymI_HasProto(stg_sel_14_upd_info) \
784 SymI_HasProto(stg_sel_15_upd_info) \
785 SymI_HasProto(stg_sel_1_upd_info) \
786 SymI_HasProto(stg_sel_2_upd_info) \
787 SymI_HasProto(stg_sel_3_upd_info) \
788 SymI_HasProto(stg_sel_4_upd_info) \
789 SymI_HasProto(stg_sel_5_upd_info) \
790 SymI_HasProto(stg_sel_6_upd_info) \
791 SymI_HasProto(stg_sel_7_upd_info) \
792 SymI_HasProto(stg_sel_8_upd_info) \
793 SymI_HasProto(stg_sel_9_upd_info) \
794 SymI_HasProto(stg_upd_frame_info) \
795 SymI_HasProto(suspendThread) \
796 SymI_HasProto(stg_takeMVarzh) \
797 SymI_HasProto(stg_threadStatuszh) \
798 SymI_HasProto(stg_tryPutMVarzh) \
799 SymI_HasProto(stg_tryTakeMVarzh) \
800 SymI_HasProto(stg_unblockAsyncExceptionszh) \
801 SymI_HasProto(unloadObj) \
802 SymI_HasProto(stg_unsafeThawArrayzh) \
803 SymI_HasProto(stg_waitReadzh) \
804 SymI_HasProto(stg_waitWritezh) \
805 SymI_HasProto(stg_writeTVarzh) \
806 SymI_HasProto(stg_yieldzh) \
807 SymI_NeedsProto(stg_interp_constr_entry) \
808 SymI_HasProto(alloc_blocks) \
809 SymI_HasProto(alloc_blocks_lim) \
810 SymI_HasProto(allocateLocal) \
811 SymI_HasProto(allocateExec) \
812 SymI_HasProto(freeExec) \
813 SymI_HasProto(getAllocations) \
814 SymI_HasProto(revertCAFs) \
815 SymI_HasProto(RtsFlags) \
816 SymI_NeedsProto(rts_breakpoint_io_action) \
817 SymI_NeedsProto(rts_stop_next_breakpoint) \
818 SymI_NeedsProto(rts_stop_on_exception) \
819 SymI_HasProto(stopTimer) \
820 SymI_HasProto(n_capabilities) \
821 SymI_HasProto(stg_traceCcszh) \
822 RTS_USER_SIGNALS_SYMBOLS
825 // 64-bit support functions in libgcc.a
826 #if defined(__GNUC__) && SIZEOF_VOID_P <= 4
827 #define RTS_LIBGCC_SYMBOLS \
828 SymI_NeedsProto(__divdi3) \
829 SymI_NeedsProto(__udivdi3) \
830 SymI_NeedsProto(__moddi3) \
831 SymI_NeedsProto(__umoddi3) \
832 SymI_NeedsProto(__muldi3) \
833 SymI_NeedsProto(__ashldi3) \
834 SymI_NeedsProto(__ashrdi3) \
835 SymI_NeedsProto(__lshrdi3) \
836 SymI_NeedsProto(__eprintf)
837 #elif defined(ia64_HOST_ARCH)
838 #define RTS_LIBGCC_SYMBOLS \
839 SymI_NeedsProto(__divdi3) \
840 SymI_NeedsProto(__udivdi3) \
841 SymI_NeedsProto(__moddi3) \
842 SymI_NeedsProto(__umoddi3) \
843 SymI_NeedsProto(__divsf3) \
844 SymI_NeedsProto(__divdf3)
846 #define RTS_LIBGCC_SYMBOLS
849 #if defined(darwin_HOST_OS) && defined(powerpc_HOST_ARCH)
850 // Symbols that don't have a leading underscore
851 // on Mac OS X. They have to receive special treatment,
852 // see machoInitSymbolsWithoutUnderscore()
853 #define RTS_MACHO_NOUNDERLINE_SYMBOLS \
854 SymI_NeedsProto(saveFP) \
855 SymI_NeedsProto(restFP)
858 /* entirely bogus claims about types of these symbols */
859 #define SymI_NeedsProto(vvv) extern void vvv(void);
860 #if defined(__PIC__) && defined(mingw32_TARGET_OS)
861 #define SymE_HasProto(vvv) SymE_HasProto(vvv);
862 #define SymE_NeedsProto(vvv) extern void _imp__ ## vvv (void);
864 #define SymE_NeedsProto(vvv) SymI_NeedsProto(vvv);
865 #define SymE_HasProto(vvv) SymI_HasProto(vvv)
867 #define SymI_HasProto(vvv) /**/
868 #define SymI_HasProto_redirect(vvv,xxx) /**/
871 RTS_POSIX_ONLY_SYMBOLS
872 RTS_MINGW_ONLY_SYMBOLS
873 RTS_CYGWIN_ONLY_SYMBOLS
874 RTS_DARWIN_ONLY_SYMBOLS
877 #undef SymI_NeedsProto
879 #undef SymI_HasProto_redirect
881 #undef SymE_NeedsProto
883 #ifdef LEADING_UNDERSCORE
884 #define MAYBE_LEADING_UNDERSCORE_STR(s) ("_" s)
886 #define MAYBE_LEADING_UNDERSCORE_STR(s) (s)
889 #define SymI_HasProto(vvv) { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
891 #define SymE_HasProto(vvv) { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
892 (void*)DLL_IMPORT_DATA_REF(vvv) },
894 #define SymI_NeedsProto(vvv) SymI_HasProto(vvv)
895 #define SymE_NeedsProto(vvv) SymE_HasProto(vvv)
897 // SymI_HasProto_redirect allows us to redirect references to one symbol to
898 // another symbol. See newCAF/newDynCAF for an example.
899 #define SymI_HasProto_redirect(vvv,xxx) \
900 { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
903 static RtsSymbolVal rtsSyms[] = {
906 RTS_POSIX_ONLY_SYMBOLS
907 RTS_MINGW_ONLY_SYMBOLS
908 RTS_CYGWIN_ONLY_SYMBOLS
909 RTS_DARWIN_ONLY_SYMBOLS
912 #if defined(darwin_HOST_OS) && defined(i386_HOST_ARCH)
913 // dyld stub code contains references to this,
914 // but it should never be called because we treat
915 // lazy pointers as nonlazy.
916 { "dyld_stub_binding_helper", (void*)0xDEADBEEF },
918 { 0, 0 } /* sentinel */
923 /* -----------------------------------------------------------------------------
924 * Insert symbols into hash tables, checking for duplicates.
927 static void ghciInsertStrHashTable ( char* obj_name,
933 if (lookupHashTable(table, (StgWord)key) == NULL)
935 insertStrHashTable(table, (StgWord)key, data);
940 "GHCi runtime linker: fatal error: I found a duplicate definition for symbol\n"
942 "whilst processing object file\n"
944 "This could be caused by:\n"
945 " * Loading two different object files which export the same symbol\n"
946 " * Specifying the same object file twice on the GHCi command line\n"
947 " * An incorrect `package.conf' entry, causing some object to be\n"
949 "GHCi cannot safely continue in this situation. Exiting now. Sorry.\n"
956 /* -----------------------------------------------------------------------------
957 * initialize the object linker
961 static int linker_init_done = 0 ;
963 #if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
964 static void *dl_prog_handle;
972 /* Make initLinker idempotent, so we can call it
973 before evey relevant operation; that means we
974 don't need to initialise the linker separately */
975 if (linker_init_done == 1) { return; } else {
976 linker_init_done = 1;
979 stablehash = allocStrHashTable();
980 symhash = allocStrHashTable();
982 /* populate the symbol table with stuff from the RTS */
983 for (sym = rtsSyms; sym->lbl != NULL; sym++) {
984 ghciInsertStrHashTable("(GHCi built-in symbols)",
985 symhash, sym->lbl, sym->addr);
987 # if defined(OBJFORMAT_MACHO) && defined(powerpc_HOST_ARCH)
988 machoInitSymbolsWithoutUnderscore();
991 # if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
992 # if defined(RTLD_DEFAULT)
993 dl_prog_handle = RTLD_DEFAULT;
995 dl_prog_handle = dlopen(NULL, RTLD_LAZY);
996 # endif /* RTLD_DEFAULT */
999 #if defined(x86_64_HOST_ARCH)
1000 if (RtsFlags.MiscFlags.linkerMemBase != 0) {
1001 // User-override for mmap_32bit_base
1002 mmap_32bit_base = (void*)RtsFlags.MiscFlags.linkerMemBase;
1006 #if defined(mingw32_HOST_OS)
1008 * These two libraries cause problems when added to the static link,
1009 * but are necessary for resolving symbols in GHCi, hence we load
1010 * them manually here.
1017 /* -----------------------------------------------------------------------------
1018 * Loading DLL or .so dynamic libraries
1019 * -----------------------------------------------------------------------------
1021 * Add a DLL from which symbols may be found. In the ELF case, just
1022 * do RTLD_GLOBAL-style add, so no further messing around needs to
1023 * happen in order that symbols in the loaded .so are findable --
1024 * lookupSymbol() will subsequently see them by dlsym on the program's
1025 * dl-handle. Returns NULL if success, otherwise ptr to an err msg.
1027 * In the PEi386 case, open the DLLs and put handles to them in a
1028 * linked list. When looking for a symbol, try all handles in the
1029 * list. This means that we need to load even DLLs that are guaranteed
1030 * to be in the ghc.exe image already, just so we can get a handle
1031 * to give to loadSymbol, so that we can find the symbols. For such
1032 * libraries, the LoadLibrary call should be a no-op except for returning
1037 #if defined(OBJFORMAT_PEi386)
1038 /* A record for storing handles into DLLs. */
1043 struct _OpenedDLL* next;
1048 /* A list thereof. */
1049 static OpenedDLL* opened_dlls = NULL;
1053 addDLL( char *dll_name )
1055 # if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1056 /* ------------------- ELF DLL loader ------------------- */
1062 // omitted: RTLD_NOW
1063 // see http://www.haskell.org/pipermail/cvs-ghc/2007-September/038570.html
1064 hdl= dlopen(dll_name, RTLD_LAZY | RTLD_GLOBAL);
1067 /* dlopen failed; return a ptr to the error msg. */
1069 if (errmsg == NULL) errmsg = "addDLL: unknown error";
1076 # elif defined(OBJFORMAT_PEi386)
1077 /* ------------------- Win32 DLL loader ------------------- */
1085 /* debugBelch("\naddDLL; dll_name = `%s'\n", dll_name); */
1087 /* See if we've already got it, and ignore if so. */
1088 for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next) {
1089 if (0 == strcmp(o_dll->name, dll_name))
1093 /* The file name has no suffix (yet) so that we can try
1094 both foo.dll and foo.drv
1096 The documentation for LoadLibrary says:
1097 If no file name extension is specified in the lpFileName
1098 parameter, the default library extension .dll is
1099 appended. However, the file name string can include a trailing
1100 point character (.) to indicate that the module name has no
1103 buf = stgMallocBytes(strlen(dll_name) + 10, "addDLL");
1104 sprintf(buf, "%s.DLL", dll_name);
1105 instance = LoadLibrary(buf);
1106 if (instance == NULL) {
1107 if (GetLastError() != ERROR_MOD_NOT_FOUND) goto error;
1108 // KAA: allow loading of drivers (like winspool.drv)
1109 sprintf(buf, "%s.DRV", dll_name);
1110 instance = LoadLibrary(buf);
1111 if (instance == NULL) {
1112 if (GetLastError() != ERROR_MOD_NOT_FOUND) goto error;
1113 // #1883: allow loading of unix-style libfoo.dll DLLs
1114 sprintf(buf, "lib%s.DLL", dll_name);
1115 instance = LoadLibrary(buf);
1116 if (instance == NULL) {
1123 /* Add this DLL to the list of DLLs in which to search for symbols. */
1124 o_dll = stgMallocBytes( sizeof(OpenedDLL), "addDLL" );
1125 o_dll->name = stgMallocBytes(1+strlen(dll_name), "addDLL");
1126 strcpy(o_dll->name, dll_name);
1127 o_dll->instance = instance;
1128 o_dll->next = opened_dlls;
1129 opened_dlls = o_dll;
1135 sysErrorBelch(dll_name);
1137 /* LoadLibrary failed; return a ptr to the error msg. */
1138 return "addDLL: could not load DLL";
1141 barf("addDLL: not implemented on this platform");
1145 /* -----------------------------------------------------------------------------
1146 * insert a stable symbol in the hash table
1150 insertStableSymbol(char* obj_name, char* key, StgPtr p)
1152 ghciInsertStrHashTable(obj_name, stablehash, key, getStablePtr(p));
1156 /* -----------------------------------------------------------------------------
1157 * insert a symbol in the hash table
1160 insertSymbol(char* obj_name, char* key, void* data)
1162 ghciInsertStrHashTable(obj_name, symhash, key, data);
1165 /* -----------------------------------------------------------------------------
1166 * lookup a symbol in the hash table
1169 lookupSymbol( char *lbl )
1173 ASSERT(symhash != NULL);
1174 val = lookupStrHashTable(symhash, lbl);
1177 # if defined(OBJFORMAT_ELF)
1178 return dlsym(dl_prog_handle, lbl);
1179 # elif defined(OBJFORMAT_MACHO)
1181 /* On OS X 10.3 and later, we use dlsym instead of the old legacy
1184 HACK: On OS X, global symbols are prefixed with an underscore.
1185 However, dlsym wants us to omit the leading underscore from the
1186 symbol name. For now, we simply strip it off here (and ONLY
1189 ASSERT(lbl[0] == '_');
1190 return dlsym(dl_prog_handle, lbl+1);
1192 if(NSIsSymbolNameDefined(lbl)) {
1193 NSSymbol symbol = NSLookupAndBindSymbol(lbl);
1194 return NSAddressOfSymbol(symbol);
1198 # endif /* HAVE_DLFCN_H */
1199 # elif defined(OBJFORMAT_PEi386)
1202 sym = lookupSymbolInDLLs(lbl);
1203 if (sym != NULL) { return sym; };
1205 // Also try looking up the symbol without the @N suffix. Some
1206 // DLLs have the suffixes on their symbols, some don't.
1207 zapTrailingAtSign ( lbl );
1208 sym = lookupSymbolInDLLs(lbl);
1209 if (sym != NULL) { return sym; };
1221 /* -----------------------------------------------------------------------------
1222 * Debugging aid: look in GHCi's object symbol tables for symbols
1223 * within DELTA bytes of the specified address, and show their names.
1226 void ghci_enquire ( char* addr );
1228 void ghci_enquire ( char* addr )
1233 const int DELTA = 64;
1238 for (oc = objects; oc; oc = oc->next) {
1239 for (i = 0; i < oc->n_symbols; i++) {
1240 sym = oc->symbols[i];
1241 if (sym == NULL) continue;
1244 a = lookupStrHashTable(symhash, sym);
1247 // debugBelch("ghci_enquire: can't find %s\n", sym);
1249 else if (addr-DELTA <= a && a <= addr+DELTA) {
1250 debugBelch("%p + %3d == `%s'\n", addr, (int)(a - addr), sym);
1257 #ifdef ia64_HOST_ARCH
1258 static unsigned int PLTSize(void);
1262 #define ROUND_UP(x,size) ((x + size - 1) & ~(size - 1))
1265 mmapForLinker (size_t bytes, nat flags, int fd)
1267 void *map_addr = NULL;
1270 static nat fixed = 0;
1272 pagesize = getpagesize();
1273 size = ROUND_UP(bytes, pagesize);
1275 #if defined(x86_64_HOST_ARCH)
1278 if (mmap_32bit_base != 0) {
1279 map_addr = mmap_32bit_base;
1283 result = mmap(map_addr, size, PROT_EXEC|PROT_READ|PROT_WRITE,
1284 MAP_PRIVATE|TRY_MAP_32BIT|fixed|flags, fd, 0);
1286 if (result == MAP_FAILED) {
1287 sysErrorBelch("mmap %lu bytes at %p",(lnat)size,map_addr);
1288 errorBelch("Try specifying an address with +RTS -xm<addr> -RTS");
1289 stg_exit(EXIT_FAILURE);
1292 #if defined(x86_64_HOST_ARCH)
1293 if (mmap_32bit_base != 0) {
1294 if (result == map_addr) {
1295 mmap_32bit_base = (StgWord8*)map_addr + size;
1297 if ((W_)result > 0x80000000) {
1298 // oops, we were given memory over 2Gb
1299 #if defined(freebsd_HOST_OS)
1300 // Some platforms require MAP_FIXED. This is normally
1301 // a bad idea, because MAP_FIXED will overwrite
1302 // existing mappings.
1303 munmap(result,size);
1307 barf("loadObj: failed to mmap() memory below 2Gb; asked for %lu bytes at %p. Try specifying an address with +RTS -xm<addr> -RTS", size, map_addr, result);
1310 // hmm, we were given memory somewhere else, but it's
1311 // still under 2Gb so we can use it. Next time, ask
1312 // for memory right after the place we just got some
1313 mmap_32bit_base = (StgWord8*)result + size;
1317 if ((W_)result > 0x80000000) {
1318 // oops, we were given memory over 2Gb
1319 // ... try allocating memory somewhere else?;
1320 debugTrace(DEBUG_linker,"MAP_32BIT didn't work; gave us %lu bytes at 0x%p", bytes, result);
1321 munmap(result, size);
1323 // Set a base address and try again... (guess: 1Gb)
1324 mmap_32bit_base = (void*)0x40000000;
1334 /* -----------------------------------------------------------------------------
1335 * Load an obj (populate the global symbol table, but don't resolve yet)
1337 * Returns: 1 if ok, 0 on error.
1340 loadObj( char *path )
1352 /* debugBelch("loadObj %s\n", path ); */
1354 /* Check that we haven't already loaded this object.
1355 Ignore requests to load multiple times */
1359 for (o = objects; o; o = o->next) {
1360 if (0 == strcmp(o->fileName, path)) {
1362 break; /* don't need to search further */
1366 IF_DEBUG(linker, debugBelch(
1367 "GHCi runtime linker: warning: looks like you're trying to load the\n"
1368 "same object file twice:\n"
1370 "GHCi will ignore this, but be warned.\n"
1372 return 1; /* success */
1376 oc = stgMallocBytes(sizeof(ObjectCode), "loadObj(oc)");
1378 # if defined(OBJFORMAT_ELF)
1379 oc->formatName = "ELF";
1380 # elif defined(OBJFORMAT_PEi386)
1381 oc->formatName = "PEi386";
1382 # elif defined(OBJFORMAT_MACHO)
1383 oc->formatName = "Mach-O";
1386 barf("loadObj: not implemented on this platform");
1389 r = stat(path, &st);
1390 if (r == -1) { return 0; }
1392 /* sigh, strdup() isn't a POSIX function, so do it the long way */
1393 oc->fileName = stgMallocBytes( strlen(path)+1, "loadObj" );
1394 strcpy(oc->fileName, path);
1396 oc->fileSize = st.st_size;
1398 oc->sections = NULL;
1399 oc->proddables = NULL;
1401 /* chain it onto the list of objects */
1406 /* On many architectures malloc'd memory isn't executable, so we need to use mmap. */
1408 #if defined(openbsd_HOST_OS)
1409 fd = open(path, O_RDONLY, S_IRUSR);
1411 fd = open(path, O_RDONLY);
1414 barf("loadObj: can't open `%s'", path);
1416 #ifdef ia64_HOST_ARCH
1417 /* The PLT needs to be right before the object */
1420 pagesize = getpagesize();
1421 n = ROUND_UP(PLTSize(), pagesize);
1422 oc->plt = mmap(NULL, n, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
1423 if (oc->plt == MAP_FAILED)
1424 barf("loadObj: can't allocate PLT");
1427 map_addr = oc->plt + n;
1429 n = ROUND_UP(oc->fileSize, pagesize);
1430 oc->image = mmap(map_addr, n, PROT_EXEC|PROT_READ|PROT_WRITE,
1431 MAP_PRIVATE|TRY_MAP_32BIT, fd, 0);
1432 if (oc->image == MAP_FAILED)
1433 barf("loadObj: can't map `%s'", path);
1436 oc->image = mmapForLinker(oc->fileSize, 0, fd);
1441 #else /* !USE_MMAP */
1442 /* load the image into memory */
1443 f = fopen(path, "rb");
1445 barf("loadObj: can't read `%s'", path);
1447 # if defined(mingw32_HOST_OS)
1448 // TODO: We would like to use allocateExec here, but allocateExec
1449 // cannot currently allocate blocks large enough.
1450 oc->image = VirtualAlloc(NULL, oc->fileSize, MEM_RESERVE | MEM_COMMIT,
1451 PAGE_EXECUTE_READWRITE);
1452 # elif defined(darwin_HOST_OS)
1453 // In a Mach-O .o file, all sections can and will be misaligned
1454 // if the total size of the headers is not a multiple of the
1455 // desired alignment. This is fine for .o files that only serve
1456 // as input for the static linker, but it's not fine for us,
1457 // as SSE (used by gcc for floating point) and Altivec require
1458 // 16-byte alignment.
1459 // We calculate the correct alignment from the header before
1460 // reading the file, and then we misalign oc->image on purpose so
1461 // that the actual sections end up aligned again.
1462 oc->misalignment = machoGetMisalignment(f);
1463 oc->image = stgMallocBytes(oc->fileSize + oc->misalignment, "loadObj(image)");
1464 oc->image += oc->misalignment;
1466 oc->image = stgMallocBytes(oc->fileSize, "loadObj(image)");
1471 n = fread ( oc->image, 1, oc->fileSize, f );
1472 if (n != oc->fileSize)
1473 barf("loadObj: error whilst reading `%s'", path);
1476 #endif /* USE_MMAP */
1478 # if defined(OBJFORMAT_MACHO) && (defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH))
1479 r = ocAllocateSymbolExtras_MachO ( oc );
1480 if (!r) { return r; }
1481 # elif defined(OBJFORMAT_ELF) && (defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH))
1482 r = ocAllocateSymbolExtras_ELF ( oc );
1483 if (!r) { return r; }
1486 /* verify the in-memory image */
1487 # if defined(OBJFORMAT_ELF)
1488 r = ocVerifyImage_ELF ( oc );
1489 # elif defined(OBJFORMAT_PEi386)
1490 r = ocVerifyImage_PEi386 ( oc );
1491 # elif defined(OBJFORMAT_MACHO)
1492 r = ocVerifyImage_MachO ( oc );
1494 barf("loadObj: no verify method");
1496 if (!r) { return r; }
1498 /* build the symbol list for this image */
1499 # if defined(OBJFORMAT_ELF)
1500 r = ocGetNames_ELF ( oc );
1501 # elif defined(OBJFORMAT_PEi386)
1502 r = ocGetNames_PEi386 ( oc );
1503 # elif defined(OBJFORMAT_MACHO)
1504 r = ocGetNames_MachO ( oc );
1506 barf("loadObj: no getNames method");
1508 if (!r) { return r; }
1510 /* loaded, but not resolved yet */
1511 oc->status = OBJECT_LOADED;
1516 /* -----------------------------------------------------------------------------
1517 * resolve all the currently unlinked objects in memory
1519 * Returns: 1 if ok, 0 on error.
1529 for (oc = objects; oc; oc = oc->next) {
1530 if (oc->status != OBJECT_RESOLVED) {
1531 # if defined(OBJFORMAT_ELF)
1532 r = ocResolve_ELF ( oc );
1533 # elif defined(OBJFORMAT_PEi386)
1534 r = ocResolve_PEi386 ( oc );
1535 # elif defined(OBJFORMAT_MACHO)
1536 r = ocResolve_MachO ( oc );
1538 barf("resolveObjs: not implemented on this platform");
1540 if (!r) { return r; }
1541 oc->status = OBJECT_RESOLVED;
1547 /* -----------------------------------------------------------------------------
1548 * delete an object from the pool
1551 unloadObj( char *path )
1553 ObjectCode *oc, *prev;
1555 ASSERT(symhash != NULL);
1556 ASSERT(objects != NULL);
1561 for (oc = objects; oc; prev = oc, oc = oc->next) {
1562 if (!strcmp(oc->fileName,path)) {
1564 /* Remove all the mappings for the symbols within this
1569 for (i = 0; i < oc->n_symbols; i++) {
1570 if (oc->symbols[i] != NULL) {
1571 removeStrHashTable(symhash, oc->symbols[i], NULL);
1579 prev->next = oc->next;
1582 // We're going to leave this in place, in case there are
1583 // any pointers from the heap into it:
1584 // #ifdef mingw32_HOST_OS
1585 // VirtualFree(oc->image);
1587 // stgFree(oc->image);
1589 stgFree(oc->fileName);
1590 stgFree(oc->symbols);
1591 stgFree(oc->sections);
1597 errorBelch("unloadObj: can't find `%s' to unload", path);
1601 /* -----------------------------------------------------------------------------
1602 * Sanity checking. For each ObjectCode, maintain a list of address ranges
1603 * which may be prodded during relocation, and abort if we try and write
1604 * outside any of these.
1606 static void addProddableBlock ( ObjectCode* oc, void* start, int size )
1609 = stgMallocBytes(sizeof(ProddableBlock), "addProddableBlock");
1610 /* debugBelch("aPB %p %p %d\n", oc, start, size); */
1614 pb->next = oc->proddables;
1615 oc->proddables = pb;
1618 static void checkProddableBlock ( ObjectCode* oc, void* addr )
1621 for (pb = oc->proddables; pb != NULL; pb = pb->next) {
1622 char* s = (char*)(pb->start);
1623 char* e = s + pb->size - 1;
1624 char* a = (char*)addr;
1625 /* Assumes that the biggest fixup involves a 4-byte write. This
1626 probably needs to be changed to 8 (ie, +7) on 64-bit
1628 if (a >= s && (a+3) <= e) return;
1630 barf("checkProddableBlock: invalid fixup in runtime linker");
1633 /* -----------------------------------------------------------------------------
1634 * Section management.
1636 static void addSection ( ObjectCode* oc, SectionKind kind,
1637 void* start, void* end )
1639 Section* s = stgMallocBytes(sizeof(Section), "addSection");
1643 s->next = oc->sections;
1646 debugBelch("addSection: %p-%p (size %d), kind %d\n",
1647 start, ((char*)end)-1, end - start + 1, kind );
1652 /* --------------------------------------------------------------------------
1654 * This is about allocating a small chunk of memory for every symbol in the
1655 * object file. We make sure that the SymboLExtras are always "in range" of
1656 * limited-range PC-relative instructions on various platforms by allocating
1657 * them right next to the object code itself.
1660 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
1663 ocAllocateSymbolExtras
1665 Allocate additional space at the end of the object file image to make room
1666 for jump islands (powerpc, x86_64) and GOT entries (x86_64).
1668 PowerPC relative branch instructions have a 24 bit displacement field.
1669 As PPC code is always 4-byte-aligned, this yields a +-32MB range.
1670 If a particular imported symbol is outside this range, we have to redirect
1671 the jump to a short piece of new code that just loads the 32bit absolute
1672 address and jumps there.
1673 On x86_64, PC-relative jumps and PC-relative accesses to the GOT are limited
1676 This function just allocates space for one SymbolExtra for every
1677 undefined symbol in the object file. The code for the jump islands is
1678 filled in by makeSymbolExtra below.
1681 static int ocAllocateSymbolExtras( ObjectCode* oc, int count, int first )
1688 int misalignment = 0;
1689 #ifdef darwin_HOST_OS
1690 misalignment = oc->misalignment;
1696 // round up to the nearest 4
1697 aligned = (oc->fileSize + 3) & ~3;
1700 pagesize = getpagesize();
1701 n = ROUND_UP( oc->fileSize, pagesize );
1702 m = ROUND_UP( aligned + sizeof (SymbolExtra) * count, pagesize );
1704 /* we try to use spare space at the end of the last page of the
1705 * image for the jump islands, but if there isn't enough space
1706 * then we have to map some (anonymously, remembering MAP_32BIT).
1708 if( m > n ) // we need to allocate more pages
1710 oc->symbol_extras = mmapForLinker(sizeof(SymbolExtra) * count,
1715 oc->symbol_extras = (SymbolExtra *) (oc->image + aligned);
1718 oc->image -= misalignment;
1719 oc->image = stgReallocBytes( oc->image,
1721 aligned + sizeof (SymbolExtra) * count,
1722 "ocAllocateSymbolExtras" );
1723 oc->image += misalignment;
1725 oc->symbol_extras = (SymbolExtra *) (oc->image + aligned);
1726 #endif /* USE_MMAP */
1728 memset( oc->symbol_extras, 0, sizeof (SymbolExtra) * count );
1731 oc->symbol_extras = NULL;
1733 oc->first_symbol_extra = first;
1734 oc->n_symbol_extras = count;
1739 static SymbolExtra* makeSymbolExtra( ObjectCode* oc,
1740 unsigned long symbolNumber,
1741 unsigned long target )
1745 ASSERT( symbolNumber >= oc->first_symbol_extra
1746 && symbolNumber - oc->first_symbol_extra < oc->n_symbol_extras);
1748 extra = &oc->symbol_extras[symbolNumber - oc->first_symbol_extra];
1750 #ifdef powerpc_HOST_ARCH
1751 // lis r12, hi16(target)
1752 extra->jumpIsland.lis_r12 = 0x3d80;
1753 extra->jumpIsland.hi_addr = target >> 16;
1755 // ori r12, r12, lo16(target)
1756 extra->jumpIsland.ori_r12_r12 = 0x618c;
1757 extra->jumpIsland.lo_addr = target & 0xffff;
1760 extra->jumpIsland.mtctr_r12 = 0x7d8903a6;
1763 extra->jumpIsland.bctr = 0x4e800420;
1765 #ifdef x86_64_HOST_ARCH
1767 static uint8_t jmp[] = { 0xFF, 0x25, 0xF2, 0xFF, 0xFF, 0xFF };
1768 extra->addr = target;
1769 memcpy(extra->jumpIsland, jmp, 6);
1777 /* --------------------------------------------------------------------------
1778 * PowerPC specifics (instruction cache flushing)
1779 * ------------------------------------------------------------------------*/
1781 #ifdef powerpc_TARGET_ARCH
1783 ocFlushInstructionCache
1785 Flush the data & instruction caches.
1786 Because the PPC has split data/instruction caches, we have to
1787 do that whenever we modify code at runtime.
1790 static void ocFlushInstructionCache( ObjectCode *oc )
1792 int n = (oc->fileSize + sizeof( SymbolExtra ) * oc->n_symbol_extras + 3) / 4;
1793 unsigned long *p = (unsigned long *) oc->image;
1797 __asm__ volatile ( "dcbf 0,%0\n\t"
1805 __asm__ volatile ( "sync\n\t"
1811 /* --------------------------------------------------------------------------
1812 * PEi386 specifics (Win32 targets)
1813 * ------------------------------------------------------------------------*/
1815 /* The information for this linker comes from
1816 Microsoft Portable Executable
1817 and Common Object File Format Specification
1818 revision 5.1 January 1998
1819 which SimonM says comes from the MS Developer Network CDs.
1821 It can be found there (on older CDs), but can also be found
1824 http://www.microsoft.com/hwdev/hardware/PECOFF.asp
1826 (this is Rev 6.0 from February 1999).
1828 Things move, so if that fails, try searching for it via
1830 http://www.google.com/search?q=PE+COFF+specification
1832 The ultimate reference for the PE format is the Winnt.h
1833 header file that comes with the Platform SDKs; as always,
1834 implementations will drift wrt their documentation.
1836 A good background article on the PE format is Matt Pietrek's
1837 March 1994 article in Microsoft System Journal (MSJ)
1838 (Vol.9, No. 3): "Peering Inside the PE: A Tour of the
1839 Win32 Portable Executable File Format." The info in there
1840 has recently been updated in a two part article in
1841 MSDN magazine, issues Feb and March 2002,
1842 "Inside Windows: An In-Depth Look into the Win32 Portable
1843 Executable File Format"
1845 John Levine's book "Linkers and Loaders" contains useful
1850 #if defined(OBJFORMAT_PEi386)
1854 typedef unsigned char UChar;
1855 typedef unsigned short UInt16;
1856 typedef unsigned int UInt32;
1863 UInt16 NumberOfSections;
1864 UInt32 TimeDateStamp;
1865 UInt32 PointerToSymbolTable;
1866 UInt32 NumberOfSymbols;
1867 UInt16 SizeOfOptionalHeader;
1868 UInt16 Characteristics;
1872 #define sizeof_COFF_header 20
1879 UInt32 VirtualAddress;
1880 UInt32 SizeOfRawData;
1881 UInt32 PointerToRawData;
1882 UInt32 PointerToRelocations;
1883 UInt32 PointerToLinenumbers;
1884 UInt16 NumberOfRelocations;
1885 UInt16 NumberOfLineNumbers;
1886 UInt32 Characteristics;
1890 #define sizeof_COFF_section 40
1897 UInt16 SectionNumber;
1900 UChar NumberOfAuxSymbols;
1904 #define sizeof_COFF_symbol 18
1909 UInt32 VirtualAddress;
1910 UInt32 SymbolTableIndex;
1915 #define sizeof_COFF_reloc 10
1918 /* From PE spec doc, section 3.3.2 */
1919 /* Note use of MYIMAGE_* since IMAGE_* are already defined in
1920 windows.h -- for the same purpose, but I want to know what I'm
1922 #define MYIMAGE_FILE_RELOCS_STRIPPED 0x0001
1923 #define MYIMAGE_FILE_EXECUTABLE_IMAGE 0x0002
1924 #define MYIMAGE_FILE_DLL 0x2000
1925 #define MYIMAGE_FILE_SYSTEM 0x1000
1926 #define MYIMAGE_FILE_BYTES_REVERSED_HI 0x8000
1927 #define MYIMAGE_FILE_BYTES_REVERSED_LO 0x0080
1928 #define MYIMAGE_FILE_32BIT_MACHINE 0x0100
1930 /* From PE spec doc, section 5.4.2 and 5.4.4 */
1931 #define MYIMAGE_SYM_CLASS_EXTERNAL 2
1932 #define MYIMAGE_SYM_CLASS_STATIC 3
1933 #define MYIMAGE_SYM_UNDEFINED 0
1935 /* From PE spec doc, section 4.1 */
1936 #define MYIMAGE_SCN_CNT_CODE 0x00000020
1937 #define MYIMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040
1938 #define MYIMAGE_SCN_LNK_NRELOC_OVFL 0x01000000
1940 /* From PE spec doc, section 5.2.1 */
1941 #define MYIMAGE_REL_I386_DIR32 0x0006
1942 #define MYIMAGE_REL_I386_REL32 0x0014
1945 /* We use myindex to calculate array addresses, rather than
1946 simply doing the normal subscript thing. That's because
1947 some of the above structs have sizes which are not
1948 a whole number of words. GCC rounds their sizes up to a
1949 whole number of words, which means that the address calcs
1950 arising from using normal C indexing or pointer arithmetic
1951 are just plain wrong. Sigh.
1954 myindex ( int scale, void* base, int index )
1957 ((UChar*)base) + scale * index;
1962 printName ( UChar* name, UChar* strtab )
1964 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
1965 UInt32 strtab_offset = * (UInt32*)(name+4);
1966 debugBelch("%s", strtab + strtab_offset );
1969 for (i = 0; i < 8; i++) {
1970 if (name[i] == 0) break;
1971 debugBelch("%c", name[i] );
1978 copyName ( UChar* name, UChar* strtab, UChar* dst, int dstSize )
1980 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
1981 UInt32 strtab_offset = * (UInt32*)(name+4);
1982 strncpy ( dst, strtab+strtab_offset, dstSize );
1988 if (name[i] == 0) break;
1998 cstring_from_COFF_symbol_name ( UChar* name, UChar* strtab )
2001 /* If the string is longer than 8 bytes, look in the
2002 string table for it -- this will be correctly zero terminated.
2004 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
2005 UInt32 strtab_offset = * (UInt32*)(name+4);
2006 return ((UChar*)strtab) + strtab_offset;
2008 /* Otherwise, if shorter than 8 bytes, return the original,
2009 which by defn is correctly terminated.
2011 if (name[7]==0) return name;
2012 /* The annoying case: 8 bytes. Copy into a temporary
2013 (which is never freed ...)
2015 newstr = stgMallocBytes(9, "cstring_from_COFF_symbol_name");
2017 strncpy(newstr,name,8);
2023 /* Just compares the short names (first 8 chars) */
2024 static COFF_section *
2025 findPEi386SectionCalled ( ObjectCode* oc, char* name )
2029 = (COFF_header*)(oc->image);
2030 COFF_section* sectab
2032 ((UChar*)(oc->image))
2033 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2035 for (i = 0; i < hdr->NumberOfSections; i++) {
2038 COFF_section* section_i
2040 myindex ( sizeof_COFF_section, sectab, i );
2041 n1 = (UChar*) &(section_i->Name);
2043 if (n1[0]==n2[0] && n1[1]==n2[1] && n1[2]==n2[2] &&
2044 n1[3]==n2[3] && n1[4]==n2[4] && n1[5]==n2[5] &&
2045 n1[6]==n2[6] && n1[7]==n2[7])
2054 zapTrailingAtSign ( UChar* sym )
2056 # define my_isdigit(c) ((c) >= '0' && (c) <= '9')
2058 if (sym[0] == 0) return;
2060 while (sym[i] != 0) i++;
2063 while (j > 0 && my_isdigit(sym[j])) j--;
2064 if (j > 0 && sym[j] == '@' && j != i) sym[j] = 0;
2069 lookupSymbolInDLLs ( UChar *lbl )
2074 for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next) {
2075 /* debugBelch("look in %s for %s\n", o_dll->name, lbl); */
2077 if (lbl[0] == '_') {
2078 /* HACK: if the name has an initial underscore, try stripping
2079 it off & look that up first. I've yet to verify whether there's
2080 a Rule that governs whether an initial '_' *should always* be
2081 stripped off when mapping from import lib name to the DLL name.
2083 sym = GetProcAddress(o_dll->instance, (lbl+1));
2085 /*debugBelch("found %s in %s\n", lbl+1,o_dll->name);*/
2089 sym = GetProcAddress(o_dll->instance, lbl);
2091 /*debugBelch("found %s in %s\n", lbl,o_dll->name);*/
2100 ocVerifyImage_PEi386 ( ObjectCode* oc )
2105 COFF_section* sectab;
2106 COFF_symbol* symtab;
2108 /* debugBelch("\nLOADING %s\n", oc->fileName); */
2109 hdr = (COFF_header*)(oc->image);
2110 sectab = (COFF_section*) (
2111 ((UChar*)(oc->image))
2112 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2114 symtab = (COFF_symbol*) (
2115 ((UChar*)(oc->image))
2116 + hdr->PointerToSymbolTable
2118 strtab = ((UChar*)symtab)
2119 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2121 if (hdr->Machine != 0x14c) {
2122 errorBelch("%s: Not x86 PEi386", oc->fileName);
2125 if (hdr->SizeOfOptionalHeader != 0) {
2126 errorBelch("%s: PEi386 with nonempty optional header", oc->fileName);
2129 if ( /* (hdr->Characteristics & MYIMAGE_FILE_RELOCS_STRIPPED) || */
2130 (hdr->Characteristics & MYIMAGE_FILE_EXECUTABLE_IMAGE) ||
2131 (hdr->Characteristics & MYIMAGE_FILE_DLL) ||
2132 (hdr->Characteristics & MYIMAGE_FILE_SYSTEM) ) {
2133 errorBelch("%s: Not a PEi386 object file", oc->fileName);
2136 if ( (hdr->Characteristics & MYIMAGE_FILE_BYTES_REVERSED_HI)
2137 /* || !(hdr->Characteristics & MYIMAGE_FILE_32BIT_MACHINE) */ ) {
2138 errorBelch("%s: Invalid PEi386 word size or endiannness: %d",
2140 (int)(hdr->Characteristics));
2143 /* If the string table size is way crazy, this might indicate that
2144 there are more than 64k relocations, despite claims to the
2145 contrary. Hence this test. */
2146 /* debugBelch("strtab size %d\n", * (UInt32*)strtab); */
2148 if ( (*(UInt32*)strtab) > 600000 ) {
2149 /* Note that 600k has no special significance other than being
2150 big enough to handle the almost-2MB-sized lumps that
2151 constitute HSwin32*.o. */
2152 debugBelch("PEi386 object has suspiciously large string table; > 64k relocs?");
2157 /* No further verification after this point; only debug printing. */
2159 IF_DEBUG(linker, i=1);
2160 if (i == 0) return 1;
2162 debugBelch( "sectab offset = %d\n", ((UChar*)sectab) - ((UChar*)hdr) );
2163 debugBelch( "symtab offset = %d\n", ((UChar*)symtab) - ((UChar*)hdr) );
2164 debugBelch( "strtab offset = %d\n", ((UChar*)strtab) - ((UChar*)hdr) );
2167 debugBelch( "Machine: 0x%x\n", (UInt32)(hdr->Machine) );
2168 debugBelch( "# sections: %d\n", (UInt32)(hdr->NumberOfSections) );
2169 debugBelch( "time/date: 0x%x\n", (UInt32)(hdr->TimeDateStamp) );
2170 debugBelch( "symtab offset: %d\n", (UInt32)(hdr->PointerToSymbolTable) );
2171 debugBelch( "# symbols: %d\n", (UInt32)(hdr->NumberOfSymbols) );
2172 debugBelch( "sz of opt hdr: %d\n", (UInt32)(hdr->SizeOfOptionalHeader) );
2173 debugBelch( "characteristics: 0x%x\n", (UInt32)(hdr->Characteristics) );
2175 /* Print the section table. */
2177 for (i = 0; i < hdr->NumberOfSections; i++) {
2179 COFF_section* sectab_i
2181 myindex ( sizeof_COFF_section, sectab, i );
2188 printName ( sectab_i->Name, strtab );
2198 sectab_i->VirtualSize,
2199 sectab_i->VirtualAddress,
2200 sectab_i->SizeOfRawData,
2201 sectab_i->PointerToRawData,
2202 sectab_i->NumberOfRelocations,
2203 sectab_i->PointerToRelocations,
2204 sectab_i->PointerToRawData
2206 reltab = (COFF_reloc*) (
2207 ((UChar*)(oc->image)) + sectab_i->PointerToRelocations
2210 if ( sectab_i->Characteristics & MYIMAGE_SCN_LNK_NRELOC_OVFL ) {
2211 /* If the relocation field (a short) has overflowed, the
2212 * real count can be found in the first reloc entry.
2214 * See Section 4.1 (last para) of the PE spec (rev6.0).
2216 COFF_reloc* rel = (COFF_reloc*)
2217 myindex ( sizeof_COFF_reloc, reltab, 0 );
2218 noRelocs = rel->VirtualAddress;
2221 noRelocs = sectab_i->NumberOfRelocations;
2225 for (; j < noRelocs; j++) {
2227 COFF_reloc* rel = (COFF_reloc*)
2228 myindex ( sizeof_COFF_reloc, reltab, j );
2230 " type 0x%-4x vaddr 0x%-8x name `",
2232 rel->VirtualAddress );
2233 sym = (COFF_symbol*)
2234 myindex ( sizeof_COFF_symbol, symtab, rel->SymbolTableIndex );
2235 /* Hmm..mysterious looking offset - what's it for? SOF */
2236 printName ( sym->Name, strtab -10 );
2243 debugBelch("string table has size 0x%x\n", * (UInt32*)strtab );
2244 debugBelch("---START of string table---\n");
2245 for (i = 4; i < *(Int32*)strtab; i++) {
2247 debugBelch("\n"); else
2248 debugBelch("%c", strtab[i] );
2250 debugBelch("--- END of string table---\n");
2255 COFF_symbol* symtab_i;
2256 if (i >= (Int32)(hdr->NumberOfSymbols)) break;
2257 symtab_i = (COFF_symbol*)
2258 myindex ( sizeof_COFF_symbol, symtab, i );
2264 printName ( symtab_i->Name, strtab );
2273 (Int32)(symtab_i->SectionNumber),
2274 (UInt32)symtab_i->Type,
2275 (UInt32)symtab_i->StorageClass,
2276 (UInt32)symtab_i->NumberOfAuxSymbols
2278 i += symtab_i->NumberOfAuxSymbols;
2288 ocGetNames_PEi386 ( ObjectCode* oc )
2291 COFF_section* sectab;
2292 COFF_symbol* symtab;
2299 hdr = (COFF_header*)(oc->image);
2300 sectab = (COFF_section*) (
2301 ((UChar*)(oc->image))
2302 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2304 symtab = (COFF_symbol*) (
2305 ((UChar*)(oc->image))
2306 + hdr->PointerToSymbolTable
2308 strtab = ((UChar*)(oc->image))
2309 + hdr->PointerToSymbolTable
2310 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2312 /* Allocate space for any (local, anonymous) .bss sections. */
2314 for (i = 0; i < hdr->NumberOfSections; i++) {
2317 COFF_section* sectab_i
2319 myindex ( sizeof_COFF_section, sectab, i );
2320 if (0 != strcmp(sectab_i->Name, ".bss")) continue;
2321 /* sof 10/05: the PE spec text isn't too clear regarding what
2322 * the SizeOfRawData field is supposed to hold for object
2323 * file sections containing just uninitialized data -- for executables,
2324 * it is supposed to be zero; unclear what it's supposed to be
2325 * for object files. However, VirtualSize is guaranteed to be
2326 * zero for object files, which definitely suggests that SizeOfRawData
2327 * will be non-zero (where else would the size of this .bss section be
2328 * stored?) Looking at the COFF_section info for incoming object files,
2329 * this certainly appears to be the case.
2331 * => I suspect we've been incorrectly handling .bss sections in (relocatable)
2332 * object files up until now. This turned out to bite us with ghc-6.4.1's use
2333 * of gcc-3.4.x, which has started to emit initially-zeroed-out local 'static'
2334 * variable decls into to the .bss section. (The specific function in Q which
2335 * triggered this is libraries/base/cbits/dirUtils.c:__hscore_getFolderPath())
2337 if (sectab_i->VirtualSize == 0 && sectab_i->SizeOfRawData == 0) continue;
2338 /* This is a non-empty .bss section. Allocate zeroed space for
2339 it, and set its PointerToRawData field such that oc->image +
2340 PointerToRawData == addr_of_zeroed_space. */
2341 bss_sz = sectab_i->VirtualSize;
2342 if ( bss_sz < sectab_i->SizeOfRawData) { bss_sz = sectab_i->SizeOfRawData; }
2343 zspace = stgCallocBytes(1, bss_sz, "ocGetNames_PEi386(anonymous bss)");
2344 sectab_i->PointerToRawData = ((UChar*)zspace) - ((UChar*)(oc->image));
2345 addProddableBlock(oc, zspace, bss_sz);
2346 /* debugBelch("BSS anon section at 0x%x\n", zspace); */
2349 /* Copy section information into the ObjectCode. */
2351 for (i = 0; i < hdr->NumberOfSections; i++) {
2357 = SECTIONKIND_OTHER;
2358 COFF_section* sectab_i
2360 myindex ( sizeof_COFF_section, sectab, i );
2361 IF_DEBUG(linker, debugBelch("section name = %s\n", sectab_i->Name ));
2364 /* I'm sure this is the Right Way to do it. However, the
2365 alternative of testing the sectab_i->Name field seems to
2366 work ok with Cygwin.
2368 if (sectab_i->Characteristics & MYIMAGE_SCN_CNT_CODE ||
2369 sectab_i->Characteristics & MYIMAGE_SCN_CNT_INITIALIZED_DATA)
2370 kind = SECTIONKIND_CODE_OR_RODATA;
2373 if (0==strcmp(".text",sectab_i->Name) ||
2374 0==strcmp(".rdata",sectab_i->Name)||
2375 0==strcmp(".rodata",sectab_i->Name))
2376 kind = SECTIONKIND_CODE_OR_RODATA;
2377 if (0==strcmp(".data",sectab_i->Name) ||
2378 0==strcmp(".bss",sectab_i->Name))
2379 kind = SECTIONKIND_RWDATA;
2381 ASSERT(sectab_i->SizeOfRawData == 0 || sectab_i->VirtualSize == 0);
2382 sz = sectab_i->SizeOfRawData;
2383 if (sz < sectab_i->VirtualSize) sz = sectab_i->VirtualSize;
2385 start = ((UChar*)(oc->image)) + sectab_i->PointerToRawData;
2386 end = start + sz - 1;
2388 if (kind == SECTIONKIND_OTHER
2389 /* Ignore sections called which contain stabs debugging
2391 && 0 != strcmp(".stab", sectab_i->Name)
2392 && 0 != strcmp(".stabstr", sectab_i->Name)
2393 /* ignore constructor section for now */
2394 && 0 != strcmp(".ctors", sectab_i->Name)
2395 /* ignore section generated from .ident */
2396 && 0!= strcmp("/4", sectab_i->Name)
2397 /* ignore unknown section that appeared in gcc 3.4.5(?) */
2398 && 0!= strcmp(".reloc", sectab_i->Name)
2400 errorBelch("Unknown PEi386 section name `%s' (while processing: %s)", sectab_i->Name, oc->fileName);
2404 if (kind != SECTIONKIND_OTHER && end >= start) {
2405 addSection(oc, kind, start, end);
2406 addProddableBlock(oc, start, end - start + 1);
2410 /* Copy exported symbols into the ObjectCode. */
2412 oc->n_symbols = hdr->NumberOfSymbols;
2413 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
2414 "ocGetNames_PEi386(oc->symbols)");
2415 /* Call me paranoid; I don't care. */
2416 for (i = 0; i < oc->n_symbols; i++)
2417 oc->symbols[i] = NULL;
2421 COFF_symbol* symtab_i;
2422 if (i >= (Int32)(hdr->NumberOfSymbols)) break;
2423 symtab_i = (COFF_symbol*)
2424 myindex ( sizeof_COFF_symbol, symtab, i );
2428 if (symtab_i->StorageClass == MYIMAGE_SYM_CLASS_EXTERNAL
2429 && symtab_i->SectionNumber != MYIMAGE_SYM_UNDEFINED) {
2430 /* This symbol is global and defined, viz, exported */
2431 /* for MYIMAGE_SYMCLASS_EXTERNAL
2432 && !MYIMAGE_SYM_UNDEFINED,
2433 the address of the symbol is:
2434 address of relevant section + offset in section
2436 COFF_section* sectabent
2437 = (COFF_section*) myindex ( sizeof_COFF_section,
2439 symtab_i->SectionNumber-1 );
2440 addr = ((UChar*)(oc->image))
2441 + (sectabent->PointerToRawData
2445 if (symtab_i->SectionNumber == MYIMAGE_SYM_UNDEFINED
2446 && symtab_i->Value > 0) {
2447 /* This symbol isn't in any section at all, ie, global bss.
2448 Allocate zeroed space for it. */
2449 addr = stgCallocBytes(1, symtab_i->Value,
2450 "ocGetNames_PEi386(non-anonymous bss)");
2451 addSection(oc, SECTIONKIND_RWDATA, addr,
2452 ((UChar*)addr) + symtab_i->Value - 1);
2453 addProddableBlock(oc, addr, symtab_i->Value);
2454 /* debugBelch("BSS section at 0x%x\n", addr); */
2457 if (addr != NULL ) {
2458 sname = cstring_from_COFF_symbol_name ( symtab_i->Name, strtab );
2459 /* debugBelch("addSymbol %p `%s \n", addr,sname); */
2460 IF_DEBUG(linker, debugBelch("addSymbol %p `%s'\n", addr,sname);)
2461 ASSERT(i >= 0 && i < oc->n_symbols);
2462 /* cstring_from_COFF_symbol_name always succeeds. */
2463 oc->symbols[i] = sname;
2464 ghciInsertStrHashTable(oc->fileName, symhash, sname, addr);
2468 "IGNORING symbol %d\n"
2472 printName ( symtab_i->Name, strtab );
2481 (Int32)(symtab_i->SectionNumber),
2482 (UInt32)symtab_i->Type,
2483 (UInt32)symtab_i->StorageClass,
2484 (UInt32)symtab_i->NumberOfAuxSymbols
2489 i += symtab_i->NumberOfAuxSymbols;
2498 ocResolve_PEi386 ( ObjectCode* oc )
2501 COFF_section* sectab;
2502 COFF_symbol* symtab;
2512 /* ToDo: should be variable-sized? But is at least safe in the
2513 sense of buffer-overrun-proof. */
2515 /* debugBelch("resolving for %s\n", oc->fileName); */
2517 hdr = (COFF_header*)(oc->image);
2518 sectab = (COFF_section*) (
2519 ((UChar*)(oc->image))
2520 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
2522 symtab = (COFF_symbol*) (
2523 ((UChar*)(oc->image))
2524 + hdr->PointerToSymbolTable
2526 strtab = ((UChar*)(oc->image))
2527 + hdr->PointerToSymbolTable
2528 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
2530 for (i = 0; i < hdr->NumberOfSections; i++) {
2531 COFF_section* sectab_i
2533 myindex ( sizeof_COFF_section, sectab, i );
2536 ((UChar*)(oc->image)) + sectab_i->PointerToRelocations
2539 /* Ignore sections called which contain stabs debugging
2541 if (0 == strcmp(".stab", sectab_i->Name)
2542 || 0 == strcmp(".stabstr", sectab_i->Name)
2543 || 0 == strcmp(".ctors", sectab_i->Name))
2546 if ( sectab_i->Characteristics & MYIMAGE_SCN_LNK_NRELOC_OVFL ) {
2547 /* If the relocation field (a short) has overflowed, the
2548 * real count can be found in the first reloc entry.
2550 * See Section 4.1 (last para) of the PE spec (rev6.0).
2552 * Nov2003 update: the GNU linker still doesn't correctly
2553 * handle the generation of relocatable object files with
2554 * overflown relocations. Hence the output to warn of potential
2557 COFF_reloc* rel = (COFF_reloc*)
2558 myindex ( sizeof_COFF_reloc, reltab, 0 );
2559 noRelocs = rel->VirtualAddress;
2561 /* 10/05: we now assume (and check for) a GNU ld that is capable
2562 * of handling object files with (>2^16) of relocs.
2565 debugBelch("WARNING: Overflown relocation field (# relocs found: %u)\n",
2570 noRelocs = sectab_i->NumberOfRelocations;
2575 for (; j < noRelocs; j++) {
2577 COFF_reloc* reltab_j
2579 myindex ( sizeof_COFF_reloc, reltab, j );
2581 /* the location to patch */
2583 ((UChar*)(oc->image))
2584 + (sectab_i->PointerToRawData
2585 + reltab_j->VirtualAddress
2586 - sectab_i->VirtualAddress )
2588 /* the existing contents of pP */
2590 /* the symbol to connect to */
2591 sym = (COFF_symbol*)
2592 myindex ( sizeof_COFF_symbol,
2593 symtab, reltab_j->SymbolTableIndex );
2596 "reloc sec %2d num %3d: type 0x%-4x "
2597 "vaddr 0x%-8x name `",
2599 (UInt32)reltab_j->Type,
2600 reltab_j->VirtualAddress );
2601 printName ( sym->Name, strtab );
2602 debugBelch("'\n" ));
2604 if (sym->StorageClass == MYIMAGE_SYM_CLASS_STATIC) {
2605 COFF_section* section_sym
2606 = findPEi386SectionCalled ( oc, sym->Name );
2608 errorBelch("%s: can't find section `%s'", oc->fileName, sym->Name);
2611 S = ((UInt32)(oc->image))
2612 + (section_sym->PointerToRawData
2615 copyName ( sym->Name, strtab, symbol, 1000-1 );
2616 S = (UInt32) lookupSymbol( symbol );
2617 if ((void*)S != NULL) goto foundit;
2618 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
2622 checkProddableBlock(oc, pP);
2623 switch (reltab_j->Type) {
2624 case MYIMAGE_REL_I386_DIR32:
2627 case MYIMAGE_REL_I386_REL32:
2628 /* Tricky. We have to insert a displacement at
2629 pP which, when added to the PC for the _next_
2630 insn, gives the address of the target (S).
2631 Problem is to know the address of the next insn
2632 when we only know pP. We assume that this
2633 literal field is always the last in the insn,
2634 so that the address of the next insn is pP+4
2635 -- hence the constant 4.
2636 Also I don't know if A should be added, but so
2637 far it has always been zero.
2639 SOF 05/2005: 'A' (old contents of *pP) have been observed
2640 to contain values other than zero (the 'wx' object file
2641 that came with wxhaskell-0.9.4; dunno how it was compiled..).
2642 So, add displacement to old value instead of asserting
2643 A to be zero. Fixes wxhaskell-related crashes, and no other
2644 ill effects have been observed.
2646 Update: the reason why we're seeing these more elaborate
2647 relocations is due to a switch in how the NCG compiles SRTs
2648 and offsets to them from info tables. SRTs live in .(ro)data,
2649 while info tables live in .text, causing GAS to emit REL32/DISP32
2650 relocations with non-zero values. Adding the displacement is
2651 the right thing to do.
2653 *pP = S - ((UInt32)pP) - 4 + A;
2656 debugBelch("%s: unhandled PEi386 relocation type %d",
2657 oc->fileName, reltab_j->Type);
2664 IF_DEBUG(linker, debugBelch("completed %s", oc->fileName));
2668 #endif /* defined(OBJFORMAT_PEi386) */
2671 /* --------------------------------------------------------------------------
2673 * ------------------------------------------------------------------------*/
2675 #if defined(OBJFORMAT_ELF)
2680 #if defined(sparc_HOST_ARCH)
2681 # define ELF_TARGET_SPARC /* Used inside <elf.h> */
2682 #elif defined(i386_HOST_ARCH)
2683 # define ELF_TARGET_386 /* Used inside <elf.h> */
2684 #elif defined(x86_64_HOST_ARCH)
2685 # define ELF_TARGET_X64_64
2687 #elif defined (ia64_HOST_ARCH)
2688 # define ELF_TARGET_IA64 /* Used inside <elf.h> */
2690 # define ELF_FUNCTION_DESC /* calling convention uses function descriptors */
2691 # define ELF_NEED_GOT /* needs Global Offset Table */
2692 # define ELF_NEED_PLT /* needs Procedure Linkage Tables */
2695 #if !defined(openbsd_HOST_OS)
2698 /* openbsd elf has things in different places, with diff names */
2699 # include <elf_abi.h>
2700 # include <machine/reloc.h>
2701 # define R_386_32 RELOC_32
2702 # define R_386_PC32 RELOC_PC32
2705 /* If elf.h doesn't define it */
2706 # ifndef R_X86_64_PC64
2707 # define R_X86_64_PC64 24
2711 * Define a set of types which can be used for both ELF32 and ELF64
2715 #define ELFCLASS ELFCLASS64
2716 #define Elf_Addr Elf64_Addr
2717 #define Elf_Word Elf64_Word
2718 #define Elf_Sword Elf64_Sword
2719 #define Elf_Ehdr Elf64_Ehdr
2720 #define Elf_Phdr Elf64_Phdr
2721 #define Elf_Shdr Elf64_Shdr
2722 #define Elf_Sym Elf64_Sym
2723 #define Elf_Rel Elf64_Rel
2724 #define Elf_Rela Elf64_Rela
2725 #define ELF_ST_TYPE ELF64_ST_TYPE
2726 #define ELF_ST_BIND ELF64_ST_BIND
2727 #define ELF_R_TYPE ELF64_R_TYPE
2728 #define ELF_R_SYM ELF64_R_SYM
2730 #define ELFCLASS ELFCLASS32
2731 #define Elf_Addr Elf32_Addr
2732 #define Elf_Word Elf32_Word
2733 #define Elf_Sword Elf32_Sword
2734 #define Elf_Ehdr Elf32_Ehdr
2735 #define Elf_Phdr Elf32_Phdr
2736 #define Elf_Shdr Elf32_Shdr
2737 #define Elf_Sym Elf32_Sym
2738 #define Elf_Rel Elf32_Rel
2739 #define Elf_Rela Elf32_Rela
2741 #define ELF_ST_TYPE ELF32_ST_TYPE
2744 #define ELF_ST_BIND ELF32_ST_BIND
2747 #define ELF_R_TYPE ELF32_R_TYPE
2750 #define ELF_R_SYM ELF32_R_SYM
2756 * Functions to allocate entries in dynamic sections. Currently we simply
2757 * preallocate a large number, and we don't check if a entry for the given
2758 * target already exists (a linear search is too slow). Ideally these
2759 * entries would be associated with symbols.
2762 /* These sizes sufficient to load HSbase + HShaskell98 + a few modules */
2763 #define GOT_SIZE 0x20000
2764 #define FUNCTION_TABLE_SIZE 0x10000
2765 #define PLT_SIZE 0x08000
2768 static Elf_Addr got[GOT_SIZE];
2769 static unsigned int gotIndex;
2770 static Elf_Addr gp_val = (Elf_Addr)got;
2773 allocateGOTEntry(Elf_Addr target)
2777 if (gotIndex >= GOT_SIZE)
2778 barf("Global offset table overflow");
2780 entry = &got[gotIndex++];
2782 return (Elf_Addr)entry;
2786 #ifdef ELF_FUNCTION_DESC
2792 static FunctionDesc functionTable[FUNCTION_TABLE_SIZE];
2793 static unsigned int functionTableIndex;
2796 allocateFunctionDesc(Elf_Addr target)
2798 FunctionDesc *entry;
2800 if (functionTableIndex >= FUNCTION_TABLE_SIZE)
2801 barf("Function table overflow");
2803 entry = &functionTable[functionTableIndex++];
2805 entry->gp = (Elf_Addr)gp_val;
2806 return (Elf_Addr)entry;
2810 copyFunctionDesc(Elf_Addr target)
2812 FunctionDesc *olddesc = (FunctionDesc *)target;
2813 FunctionDesc *newdesc;
2815 newdesc = (FunctionDesc *)allocateFunctionDesc(olddesc->ip);
2816 newdesc->gp = olddesc->gp;
2817 return (Elf_Addr)newdesc;
2822 #ifdef ia64_HOST_ARCH
2823 static void ia64_reloc_gprel22(Elf_Addr target, Elf_Addr value);
2824 static void ia64_reloc_pcrel21(Elf_Addr target, Elf_Addr value, ObjectCode *oc);
2826 static unsigned char plt_code[] =
2828 /* taken from binutils bfd/elfxx-ia64.c */
2829 0x0b, 0x78, 0x00, 0x02, 0x00, 0x24, /* [MMI] addl r15=0,r1;; */
2830 0x00, 0x41, 0x3c, 0x30, 0x28, 0xc0, /* ld8 r16=[r15],8 */
2831 0x01, 0x08, 0x00, 0x84, /* mov r14=r1;; */
2832 0x11, 0x08, 0x00, 0x1e, 0x18, 0x10, /* [MIB] ld8 r1=[r15] */
2833 0x60, 0x80, 0x04, 0x80, 0x03, 0x00, /* mov b6=r16 */
2834 0x60, 0x00, 0x80, 0x00 /* br.few b6;; */
2837 /* If we can't get to the function descriptor via gp, take a local copy of it */
2838 #define PLT_RELOC(code, target) { \
2839 Elf64_Sxword rel_value = target - gp_val; \
2840 if ((rel_value > 0x1fffff) || (rel_value < -0x1fffff)) \
2841 ia64_reloc_gprel22((Elf_Addr)code, copyFunctionDesc(target)); \
2843 ia64_reloc_gprel22((Elf_Addr)code, target); \
2848 unsigned char code[sizeof(plt_code)];
2852 allocatePLTEntry(Elf_Addr target, ObjectCode *oc)
2854 PLTEntry *plt = (PLTEntry *)oc->plt;
2857 if (oc->pltIndex >= PLT_SIZE)
2858 barf("Procedure table overflow");
2860 entry = &plt[oc->pltIndex++];
2861 memcpy(entry->code, plt_code, sizeof(entry->code));
2862 PLT_RELOC(entry->code, target);
2863 return (Elf_Addr)entry;
2869 return (PLT_SIZE * sizeof(PLTEntry));
2875 * Generic ELF functions
2879 findElfSection ( void* objImage, Elf_Word sh_type )
2881 char* ehdrC = (char*)objImage;
2882 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
2883 Elf_Shdr* shdr = (Elf_Shdr*)(ehdrC + ehdr->e_shoff);
2884 char* sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
2888 for (i = 0; i < ehdr->e_shnum; i++) {
2889 if (shdr[i].sh_type == sh_type
2890 /* Ignore the section header's string table. */
2891 && i != ehdr->e_shstrndx
2892 /* Ignore string tables named .stabstr, as they contain
2894 && 0 != memcmp(".stabstr", sh_strtab + shdr[i].sh_name, 8)
2896 ptr = ehdrC + shdr[i].sh_offset;
2903 #if defined(ia64_HOST_ARCH)
2905 findElfSegment ( void* objImage, Elf_Addr vaddr )
2907 char* ehdrC = (char*)objImage;
2908 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
2909 Elf_Phdr* phdr = (Elf_Phdr*)(ehdrC + ehdr->e_phoff);
2910 Elf_Addr segaddr = 0;
2913 for (i = 0; i < ehdr->e_phnum; i++) {
2914 segaddr = phdr[i].p_vaddr;
2915 if ((vaddr >= segaddr) && (vaddr < segaddr + phdr[i].p_memsz))
2923 ocVerifyImage_ELF ( ObjectCode* oc )
2927 int i, j, nent, nstrtab, nsymtabs;
2931 char* ehdrC = (char*)(oc->image);
2932 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
2934 if (ehdr->e_ident[EI_MAG0] != ELFMAG0 ||
2935 ehdr->e_ident[EI_MAG1] != ELFMAG1 ||
2936 ehdr->e_ident[EI_MAG2] != ELFMAG2 ||
2937 ehdr->e_ident[EI_MAG3] != ELFMAG3) {
2938 errorBelch("%s: not an ELF object", oc->fileName);
2942 if (ehdr->e_ident[EI_CLASS] != ELFCLASS) {
2943 errorBelch("%s: unsupported ELF format", oc->fileName);
2947 if (ehdr->e_ident[EI_DATA] == ELFDATA2LSB) {
2948 IF_DEBUG(linker,debugBelch( "Is little-endian\n" ));
2950 if (ehdr->e_ident[EI_DATA] == ELFDATA2MSB) {
2951 IF_DEBUG(linker,debugBelch( "Is big-endian\n" ));
2953 errorBelch("%s: unknown endiannness", oc->fileName);
2957 if (ehdr->e_type != ET_REL) {
2958 errorBelch("%s: not a relocatable object (.o) file", oc->fileName);
2961 IF_DEBUG(linker, debugBelch( "Is a relocatable object (.o) file\n" ));
2963 IF_DEBUG(linker,debugBelch( "Architecture is " ));
2964 switch (ehdr->e_machine) {
2965 case EM_386: IF_DEBUG(linker,debugBelch( "x86" )); break;
2966 #ifdef EM_SPARC32PLUS
2967 case EM_SPARC32PLUS:
2969 case EM_SPARC: IF_DEBUG(linker,debugBelch( "sparc" )); break;
2971 case EM_IA_64: IF_DEBUG(linker,debugBelch( "ia64" )); break;
2973 case EM_PPC: IF_DEBUG(linker,debugBelch( "powerpc32" )); break;
2975 case EM_X86_64: IF_DEBUG(linker,debugBelch( "x86_64" )); break;
2976 #elif defined(EM_AMD64)
2977 case EM_AMD64: IF_DEBUG(linker,debugBelch( "amd64" )); break;
2979 default: IF_DEBUG(linker,debugBelch( "unknown" ));
2980 errorBelch("%s: unknown architecture (e_machine == %d)"
2981 , oc->fileName, ehdr->e_machine);
2985 IF_DEBUG(linker,debugBelch(
2986 "\nSection header table: start %ld, n_entries %d, ent_size %d\n",
2987 (long)ehdr->e_shoff, ehdr->e_shnum, ehdr->e_shentsize ));
2989 ASSERT (ehdr->e_shentsize == sizeof(Elf_Shdr));
2991 shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
2993 if (ehdr->e_shstrndx == SHN_UNDEF) {
2994 errorBelch("%s: no section header string table", oc->fileName);
2997 IF_DEBUG(linker,debugBelch( "Section header string table is section %d\n",
2999 sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
3002 for (i = 0; i < ehdr->e_shnum; i++) {
3003 IF_DEBUG(linker,debugBelch("%2d: ", i ));
3004 IF_DEBUG(linker,debugBelch("type=%2d ", (int)shdr[i].sh_type ));
3005 IF_DEBUG(linker,debugBelch("size=%4d ", (int)shdr[i].sh_size ));
3006 IF_DEBUG(linker,debugBelch("offs=%4d ", (int)shdr[i].sh_offset ));
3007 IF_DEBUG(linker,debugBelch(" (%p .. %p) ",
3008 ehdrC + shdr[i].sh_offset,
3009 ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1));
3011 if (shdr[i].sh_type == SHT_REL) {
3012 IF_DEBUG(linker,debugBelch("Rel " ));
3013 } else if (shdr[i].sh_type == SHT_RELA) {
3014 IF_DEBUG(linker,debugBelch("RelA " ));
3016 IF_DEBUG(linker,debugBelch(" "));
3019 IF_DEBUG(linker,debugBelch("sname=%s\n", sh_strtab + shdr[i].sh_name ));
3023 IF_DEBUG(linker,debugBelch( "\nString tables" ));
3026 for (i = 0; i < ehdr->e_shnum; i++) {
3027 if (shdr[i].sh_type == SHT_STRTAB
3028 /* Ignore the section header's string table. */
3029 && i != ehdr->e_shstrndx
3030 /* Ignore string tables named .stabstr, as they contain
3032 && 0 != memcmp(".stabstr", sh_strtab + shdr[i].sh_name, 8)
3034 IF_DEBUG(linker,debugBelch(" section %d is a normal string table", i ));
3035 strtab = ehdrC + shdr[i].sh_offset;
3040 errorBelch("%s: no string tables, or too many", oc->fileName);
3045 IF_DEBUG(linker,debugBelch( "\nSymbol tables" ));
3046 for (i = 0; i < ehdr->e_shnum; i++) {
3047 if (shdr[i].sh_type != SHT_SYMTAB) continue;
3048 IF_DEBUG(linker,debugBelch( "section %d is a symbol table\n", i ));
3050 stab = (Elf_Sym*) (ehdrC + shdr[i].sh_offset);
3051 nent = shdr[i].sh_size / sizeof(Elf_Sym);
3052 IF_DEBUG(linker,debugBelch( " number of entries is apparently %d (%ld rem)\n",
3054 (long)shdr[i].sh_size % sizeof(Elf_Sym)
3056 if (0 != shdr[i].sh_size % sizeof(Elf_Sym)) {
3057 errorBelch("%s: non-integral number of symbol table entries", oc->fileName);
3060 for (j = 0; j < nent; j++) {
3061 IF_DEBUG(linker,debugBelch(" %2d ", j ));
3062 IF_DEBUG(linker,debugBelch(" sec=%-5d size=%-3d val=%5p ",
3063 (int)stab[j].st_shndx,
3064 (int)stab[j].st_size,
3065 (char*)stab[j].st_value ));
3067 IF_DEBUG(linker,debugBelch("type=" ));
3068 switch (ELF_ST_TYPE(stab[j].st_info)) {
3069 case STT_NOTYPE: IF_DEBUG(linker,debugBelch("notype " )); break;
3070 case STT_OBJECT: IF_DEBUG(linker,debugBelch("object " )); break;
3071 case STT_FUNC : IF_DEBUG(linker,debugBelch("func " )); break;
3072 case STT_SECTION: IF_DEBUG(linker,debugBelch("section" )); break;
3073 case STT_FILE: IF_DEBUG(linker,debugBelch("file " )); break;
3074 default: IF_DEBUG(linker,debugBelch("? " )); break;
3076 IF_DEBUG(linker,debugBelch(" " ));
3078 IF_DEBUG(linker,debugBelch("bind=" ));
3079 switch (ELF_ST_BIND(stab[j].st_info)) {
3080 case STB_LOCAL : IF_DEBUG(linker,debugBelch("local " )); break;
3081 case STB_GLOBAL: IF_DEBUG(linker,debugBelch("global" )); break;
3082 case STB_WEAK : IF_DEBUG(linker,debugBelch("weak " )); break;
3083 default: IF_DEBUG(linker,debugBelch("? " )); break;
3085 IF_DEBUG(linker,debugBelch(" " ));
3087 IF_DEBUG(linker,debugBelch("name=%s\n", strtab + stab[j].st_name ));
3091 if (nsymtabs == 0) {
3092 errorBelch("%s: didn't find any symbol tables", oc->fileName);
3099 static int getSectionKind_ELF( Elf_Shdr *hdr, int *is_bss )
3103 if (hdr->sh_type == SHT_PROGBITS
3104 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_EXECINSTR)) {
3105 /* .text-style section */
3106 return SECTIONKIND_CODE_OR_RODATA;
3109 if (hdr->sh_type == SHT_PROGBITS
3110 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_WRITE)) {
3111 /* .data-style section */
3112 return SECTIONKIND_RWDATA;
3115 if (hdr->sh_type == SHT_PROGBITS
3116 && (hdr->sh_flags & SHF_ALLOC) && !(hdr->sh_flags & SHF_WRITE)) {
3117 /* .rodata-style section */
3118 return SECTIONKIND_CODE_OR_RODATA;
3121 if (hdr->sh_type == SHT_NOBITS
3122 && (hdr->sh_flags & SHF_ALLOC) && (hdr->sh_flags & SHF_WRITE)) {
3123 /* .bss-style section */
3125 return SECTIONKIND_RWDATA;
3128 return SECTIONKIND_OTHER;
3133 ocGetNames_ELF ( ObjectCode* oc )
3138 char* ehdrC = (char*)(oc->image);
3139 Elf_Ehdr* ehdr = (Elf_Ehdr*)ehdrC;
3140 char* strtab = findElfSection ( ehdrC, SHT_STRTAB );
3141 Elf_Shdr* shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
3143 ASSERT(symhash != NULL);
3146 errorBelch("%s: no strtab", oc->fileName);
3151 for (i = 0; i < ehdr->e_shnum; i++) {
3152 /* Figure out what kind of section it is. Logic derived from
3153 Figure 1.14 ("Special Sections") of the ELF document
3154 ("Portable Formats Specification, Version 1.1"). */
3156 SectionKind kind = getSectionKind_ELF(&shdr[i], &is_bss);
3158 if (is_bss && shdr[i].sh_size > 0) {
3159 /* This is a non-empty .bss section. Allocate zeroed space for
3160 it, and set its .sh_offset field such that
3161 ehdrC + .sh_offset == addr_of_zeroed_space. */
3162 char* zspace = stgCallocBytes(1, shdr[i].sh_size,
3163 "ocGetNames_ELF(BSS)");
3164 shdr[i].sh_offset = ((char*)zspace) - ((char*)ehdrC);
3166 debugBelch("BSS section at 0x%x, size %d\n",
3167 zspace, shdr[i].sh_size);
3171 /* fill in the section info */
3172 if (kind != SECTIONKIND_OTHER && shdr[i].sh_size > 0) {
3173 addProddableBlock(oc, ehdrC + shdr[i].sh_offset, shdr[i].sh_size);
3174 addSection(oc, kind, ehdrC + shdr[i].sh_offset,
3175 ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1);
3178 if (shdr[i].sh_type != SHT_SYMTAB) continue;
3180 /* copy stuff into this module's object symbol table */
3181 stab = (Elf_Sym*) (ehdrC + shdr[i].sh_offset);
3182 nent = shdr[i].sh_size / sizeof(Elf_Sym);
3184 oc->n_symbols = nent;
3185 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
3186 "ocGetNames_ELF(oc->symbols)");
3188 for (j = 0; j < nent; j++) {
3190 char isLocal = FALSE; /* avoids uninit-var warning */
3192 char* nm = strtab + stab[j].st_name;
3193 int secno = stab[j].st_shndx;
3195 /* Figure out if we want to add it; if so, set ad to its
3196 address. Otherwise leave ad == NULL. */
3198 if (secno == SHN_COMMON) {
3200 ad = stgCallocBytes(1, stab[j].st_size, "ocGetNames_ELF(COMMON)");
3202 debugBelch("COMMON symbol, size %d name %s\n",
3203 stab[j].st_size, nm);
3205 /* Pointless to do addProddableBlock() for this area,
3206 since the linker should never poke around in it. */
3209 if ( ( ELF_ST_BIND(stab[j].st_info)==STB_GLOBAL
3210 || ELF_ST_BIND(stab[j].st_info)==STB_LOCAL
3212 /* and not an undefined symbol */
3213 && stab[j].st_shndx != SHN_UNDEF
3214 /* and not in a "special section" */
3215 && stab[j].st_shndx < SHN_LORESERVE
3217 /* and it's a not a section or string table or anything silly */
3218 ( ELF_ST_TYPE(stab[j].st_info)==STT_FUNC ||
3219 ELF_ST_TYPE(stab[j].st_info)==STT_OBJECT ||
3220 ELF_ST_TYPE(stab[j].st_info)==STT_NOTYPE
3223 /* Section 0 is the undefined section, hence > and not >=. */
3224 ASSERT(secno > 0 && secno < ehdr->e_shnum);
3226 if (shdr[secno].sh_type == SHT_NOBITS) {
3227 debugBelch(" BSS symbol, size %d off %d name %s\n",
3228 stab[j].st_size, stab[j].st_value, nm);
3231 ad = ehdrC + shdr[ secno ].sh_offset + stab[j].st_value;
3232 if (ELF_ST_BIND(stab[j].st_info)==STB_LOCAL) {
3235 #ifdef ELF_FUNCTION_DESC
3236 /* dlsym() and the initialisation table both give us function
3237 * descriptors, so to be consistent we store function descriptors
3238 * in the symbol table */
3239 if (ELF_ST_TYPE(stab[j].st_info) == STT_FUNC)
3240 ad = (char *)allocateFunctionDesc((Elf_Addr)ad);
3242 IF_DEBUG(linker,debugBelch( "addOTabName(GLOB): %10p %s %s\n",
3243 ad, oc->fileName, nm ));
3248 /* And the decision is ... */
3252 oc->symbols[j] = nm;
3255 /* Ignore entirely. */
3257 ghciInsertStrHashTable(oc->fileName, symhash, nm, ad);
3261 IF_DEBUG(linker,debugBelch( "skipping `%s'\n",
3262 strtab + stab[j].st_name ));
3265 "skipping bind = %d, type = %d, shndx = %d `%s'\n",
3266 (int)ELF_ST_BIND(stab[j].st_info),
3267 (int)ELF_ST_TYPE(stab[j].st_info),
3268 (int)stab[j].st_shndx,
3269 strtab + stab[j].st_name
3272 oc->symbols[j] = NULL;
3281 /* Do ELF relocations which lack an explicit addend. All x86-linux
3282 relocations appear to be of this form. */
3284 do_Elf_Rel_relocations ( ObjectCode* oc, char* ehdrC,
3285 Elf_Shdr* shdr, int shnum,
3286 Elf_Sym* stab, char* strtab )
3291 Elf_Rel* rtab = (Elf_Rel*) (ehdrC + shdr[shnum].sh_offset);
3292 int nent = shdr[shnum].sh_size / sizeof(Elf_Rel);
3293 int target_shndx = shdr[shnum].sh_info;
3294 int symtab_shndx = shdr[shnum].sh_link;
3296 stab = (Elf_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
3297 targ = (Elf_Word*)(ehdrC + shdr[ target_shndx ].sh_offset);
3298 IF_DEBUG(linker,debugBelch( "relocations for section %d using symtab %d\n",
3299 target_shndx, symtab_shndx ));
3301 /* Skip sections that we're not interested in. */
3304 SectionKind kind = getSectionKind_ELF(&shdr[target_shndx], &is_bss);
3305 if (kind == SECTIONKIND_OTHER) {
3306 IF_DEBUG(linker,debugBelch( "skipping (target section not loaded)"));
3311 for (j = 0; j < nent; j++) {
3312 Elf_Addr offset = rtab[j].r_offset;
3313 Elf_Addr info = rtab[j].r_info;
3315 Elf_Addr P = ((Elf_Addr)targ) + offset;
3316 Elf_Word* pP = (Elf_Word*)P;
3321 StgStablePtr stablePtr;
3324 IF_DEBUG(linker,debugBelch( "Rel entry %3d is raw(%6p %6p)",
3325 j, (void*)offset, (void*)info ));
3327 IF_DEBUG(linker,debugBelch( " ZERO" ));
3330 Elf_Sym sym = stab[ELF_R_SYM(info)];
3331 /* First see if it is a local symbol. */
3332 if (ELF_ST_BIND(sym.st_info) == STB_LOCAL) {
3333 /* Yes, so we can get the address directly from the ELF symbol
3335 symbol = sym.st_name==0 ? "(noname)" : strtab+sym.st_name;
3337 (ehdrC + shdr[ sym.st_shndx ].sh_offset
3338 + stab[ELF_R_SYM(info)].st_value);
3341 symbol = strtab + sym.st_name;
3342 stablePtr = (StgStablePtr)lookupHashTable(stablehash, (StgWord)symbol);
3343 if (NULL == stablePtr) {
3344 /* No, so look up the name in our global table. */
3345 S_tmp = lookupSymbol( symbol );
3346 S = (Elf_Addr)S_tmp;
3348 stableVal = deRefStablePtr( stablePtr );
3350 S = (Elf_Addr)S_tmp;
3354 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3357 IF_DEBUG(linker,debugBelch( "`%s' resolves to %p\n", symbol, (void*)S ));
3360 IF_DEBUG(linker,debugBelch( "Reloc: P = %p S = %p A = %p\n",
3361 (void*)P, (void*)S, (void*)A ));
3362 checkProddableBlock ( oc, pP );
3366 switch (ELF_R_TYPE(info)) {
3367 # ifdef i386_HOST_ARCH
3368 case R_386_32: *pP = value; break;
3369 case R_386_PC32: *pP = value - P; break;
3372 errorBelch("%s: unhandled ELF relocation(Rel) type %lu\n",
3373 oc->fileName, (lnat)ELF_R_TYPE(info));
3381 /* Do ELF relocations for which explicit addends are supplied.
3382 sparc-solaris relocations appear to be of this form. */
3384 do_Elf_Rela_relocations ( ObjectCode* oc, char* ehdrC,
3385 Elf_Shdr* shdr, int shnum,
3386 Elf_Sym* stab, char* strtab )
3389 char *symbol = NULL;
3391 Elf_Rela* rtab = (Elf_Rela*) (ehdrC + shdr[shnum].sh_offset);
3392 int nent = shdr[shnum].sh_size / sizeof(Elf_Rela);
3393 int target_shndx = shdr[shnum].sh_info;
3394 int symtab_shndx = shdr[shnum].sh_link;
3396 stab = (Elf_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
3397 targ = (Elf_Addr) (ehdrC + shdr[ target_shndx ].sh_offset);
3398 IF_DEBUG(linker,debugBelch( "relocations for section %d using symtab %d\n",
3399 target_shndx, symtab_shndx ));
3401 for (j = 0; j < nent; j++) {
3402 #if defined(DEBUG) || defined(sparc_HOST_ARCH) || defined(ia64_HOST_ARCH) || defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
3403 /* This #ifdef only serves to avoid unused-var warnings. */
3404 Elf_Addr offset = rtab[j].r_offset;
3405 Elf_Addr P = targ + offset;
3407 Elf_Addr info = rtab[j].r_info;
3408 Elf_Addr A = rtab[j].r_addend;
3412 # if defined(sparc_HOST_ARCH)
3413 Elf_Word* pP = (Elf_Word*)P;
3415 # elif defined(ia64_HOST_ARCH)
3416 Elf64_Xword *pP = (Elf64_Xword *)P;
3418 # elif defined(powerpc_HOST_ARCH)
3422 IF_DEBUG(linker,debugBelch( "Rel entry %3d is raw(%6p %6p %6p) ",
3423 j, (void*)offset, (void*)info,
3426 IF_DEBUG(linker,debugBelch( " ZERO" ));
3429 Elf_Sym sym = stab[ELF_R_SYM(info)];
3430 /* First see if it is a local symbol. */
3431 if (ELF_ST_BIND(sym.st_info) == STB_LOCAL) {
3432 /* Yes, so we can get the address directly from the ELF symbol
3434 symbol = sym.st_name==0 ? "(noname)" : strtab+sym.st_name;
3436 (ehdrC + shdr[ sym.st_shndx ].sh_offset
3437 + stab[ELF_R_SYM(info)].st_value);
3438 #ifdef ELF_FUNCTION_DESC
3439 /* Make a function descriptor for this function */
3440 if (S && ELF_ST_TYPE(sym.st_info) == STT_FUNC) {
3441 S = allocateFunctionDesc(S + A);
3446 /* No, so look up the name in our global table. */
3447 symbol = strtab + sym.st_name;
3448 S_tmp = lookupSymbol( symbol );
3449 S = (Elf_Addr)S_tmp;
3451 #ifdef ELF_FUNCTION_DESC
3452 /* If a function, already a function descriptor - we would
3453 have to copy it to add an offset. */
3454 if (S && (ELF_ST_TYPE(sym.st_info) == STT_FUNC) && (A != 0))
3455 errorBelch("%s: function %s with addend %p", oc->fileName, symbol, (void *)A);
3459 errorBelch("%s: unknown symbol `%s'", oc->fileName, symbol);
3462 IF_DEBUG(linker,debugBelch( "`%s' resolves to %p", symbol, (void*)S ));
3465 IF_DEBUG(linker,debugBelch("Reloc: P = %p S = %p A = %p\n",
3466 (void*)P, (void*)S, (void*)A ));
3467 /* checkProddableBlock ( oc, (void*)P ); */
3471 switch (ELF_R_TYPE(info)) {
3472 # if defined(sparc_HOST_ARCH)
3473 case R_SPARC_WDISP30:
3474 w1 = *pP & 0xC0000000;
3475 w2 = (Elf_Word)((value - P) >> 2);
3476 ASSERT((w2 & 0xC0000000) == 0);
3481 w1 = *pP & 0xFFC00000;
3482 w2 = (Elf_Word)(value >> 10);
3483 ASSERT((w2 & 0xFFC00000) == 0);
3489 w2 = (Elf_Word)(value & 0x3FF);
3490 ASSERT((w2 & ~0x3FF) == 0);
3495 /* According to the Sun documentation:
3497 This relocation type resembles R_SPARC_32, except it refers to an
3498 unaligned word. That is, the word to be relocated must be treated
3499 as four separate bytes with arbitrary alignment, not as a word
3500 aligned according to the architecture requirements.
3503 w2 = (Elf_Word)value;
3505 // SPARC doesn't do misaligned writes of 32 bit words,
3506 // so we have to do this one byte-at-a-time.
3507 char *pPc = (char*)pP;
3508 pPc[0] = (char) ((Elf_Word)(w2 & 0xff000000) >> 24);
3509 pPc[1] = (char) ((Elf_Word)(w2 & 0x00ff0000) >> 16);
3510 pPc[2] = (char) ((Elf_Word)(w2 & 0x0000ff00) >> 8);
3511 pPc[3] = (char) ((Elf_Word)(w2 & 0x000000ff));
3515 w2 = (Elf_Word)value;
3518 # elif defined(ia64_HOST_ARCH)
3519 case R_IA64_DIR64LSB:
3520 case R_IA64_FPTR64LSB:
3523 case R_IA64_PCREL64LSB:
3526 case R_IA64_SEGREL64LSB:
3527 addr = findElfSegment(ehdrC, value);
3530 case R_IA64_GPREL22:
3531 ia64_reloc_gprel22(P, value);
3533 case R_IA64_LTOFF22:
3534 case R_IA64_LTOFF22X:
3535 case R_IA64_LTOFF_FPTR22:
3536 addr = allocateGOTEntry(value);
3537 ia64_reloc_gprel22(P, addr);
3539 case R_IA64_PCREL21B:
3540 ia64_reloc_pcrel21(P, S, oc);
3543 /* This goes with R_IA64_LTOFF22X and points to the load to
3544 * convert into a move. We don't implement relaxation. */
3546 # elif defined(powerpc_HOST_ARCH)
3547 case R_PPC_ADDR16_LO:
3548 *(Elf32_Half*) P = value;
3551 case R_PPC_ADDR16_HI:
3552 *(Elf32_Half*) P = value >> 16;
3555 case R_PPC_ADDR16_HA:
3556 *(Elf32_Half*) P = (value + 0x8000) >> 16;
3560 *(Elf32_Word *) P = value;
3564 *(Elf32_Word *) P = value - P;
3570 if( delta << 6 >> 6 != delta )
3572 value = (Elf_Addr) (&makeSymbolExtra( oc, ELF_R_SYM(info), value )
3576 if( value == 0 || delta << 6 >> 6 != delta )
3578 barf( "Unable to make SymbolExtra for #%d",
3584 *(Elf_Word *) P = (*(Elf_Word *) P & 0xfc000003)
3585 | (delta & 0x3fffffc);
3589 #if x86_64_HOST_ARCH
3591 *(Elf64_Xword *)P = value;
3596 StgInt64 off = value - P;
3597 if (off >= 0x7fffffffL || off < -0x80000000L) {
3598 #if X86_64_ELF_NONPIC_HACK
3599 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
3601 off = pltAddress + A - P;
3603 barf("R_X86_64_PC32 relocation out of range: %s = %p\nRecompile %s with -fPIC.",
3604 symbol, off, oc->fileName );
3607 *(Elf64_Word *)P = (Elf64_Word)off;
3613 StgInt64 off = value - P;
3614 *(Elf64_Word *)P = (Elf64_Word)off;
3619 if (value >= 0x7fffffffL) {
3620 #if X86_64_ELF_NONPIC_HACK
3621 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
3623 value = pltAddress + A;
3625 barf("R_X86_64_32 relocation out of range: %s = %p\nRecompile %s with -fPIC.",
3626 symbol, value, oc->fileName );
3629 *(Elf64_Word *)P = (Elf64_Word)value;
3633 if ((StgInt64)value > 0x7fffffffL || (StgInt64)value < -0x80000000L) {
3634 #if X86_64_ELF_NONPIC_HACK
3635 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
3637 value = pltAddress + A;
3639 barf("R_X86_64_32S relocation out of range: %s = %p\nRecompile %s with -fPIC.",
3640 symbol, value, oc->fileName );
3643 *(Elf64_Sword *)P = (Elf64_Sword)value;
3646 case R_X86_64_GOTPCREL:
3648 StgInt64 gotAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)->addr;
3649 StgInt64 off = gotAddress + A - P;
3650 *(Elf64_Word *)P = (Elf64_Word)off;
3654 case R_X86_64_PLT32:
3656 StgInt64 off = value - P;
3657 if (off >= 0x7fffffffL || off < -0x80000000L) {
3658 StgInt64 pltAddress = (StgInt64) &makeSymbolExtra(oc, ELF_R_SYM(info), S)
3660 off = pltAddress + A - P;
3662 *(Elf64_Word *)P = (Elf64_Word)off;
3668 errorBelch("%s: unhandled ELF relocation(RelA) type %lu\n",
3669 oc->fileName, (lnat)ELF_R_TYPE(info));
3678 ocResolve_ELF ( ObjectCode* oc )
3682 Elf_Sym* stab = NULL;
3683 char* ehdrC = (char*)(oc->image);
3684 Elf_Ehdr* ehdr = (Elf_Ehdr*) ehdrC;
3685 Elf_Shdr* shdr = (Elf_Shdr*) (ehdrC + ehdr->e_shoff);
3687 /* first find "the" symbol table */
3688 stab = (Elf_Sym*) findElfSection ( ehdrC, SHT_SYMTAB );
3690 /* also go find the string table */
3691 strtab = findElfSection ( ehdrC, SHT_STRTAB );
3693 if (stab == NULL || strtab == NULL) {
3694 errorBelch("%s: can't find string or symbol table", oc->fileName);
3698 /* Process the relocation sections. */
3699 for (shnum = 0; shnum < ehdr->e_shnum; shnum++) {
3700 if (shdr[shnum].sh_type == SHT_REL) {
3701 ok = do_Elf_Rel_relocations ( oc, ehdrC, shdr,
3702 shnum, stab, strtab );
3706 if (shdr[shnum].sh_type == SHT_RELA) {
3707 ok = do_Elf_Rela_relocations ( oc, ehdrC, shdr,
3708 shnum, stab, strtab );
3713 #if defined(powerpc_HOST_ARCH)
3714 ocFlushInstructionCache( oc );
3722 * Instructions are 41 bits long, packed into 128 bit bundles with a 5-bit template
3723 * at the front. The following utility functions pack and unpack instructions, and
3724 * take care of the most common relocations.
3727 #ifdef ia64_HOST_ARCH
3730 ia64_extract_instruction(Elf64_Xword *target)
3733 int slot = (Elf_Addr)target & 3;
3734 target = (Elf_Addr)target & ~3;
3742 return ((w1 >> 5) & 0x1ffffffffff);
3744 return (w1 >> 46) | ((w2 & 0x7fffff) << 18);
3748 barf("ia64_extract_instruction: invalid slot %p", target);
3753 ia64_deposit_instruction(Elf64_Xword *target, Elf64_Xword value)
3755 int slot = (Elf_Addr)target & 3;
3756 target = (Elf_Addr)target & ~3;
3761 *target |= value << 5;
3764 *target |= value << 46;
3765 *(target+1) |= value >> 18;
3768 *(target+1) |= value << 23;
3774 ia64_reloc_gprel22(Elf_Addr target, Elf_Addr value)
3776 Elf64_Xword instruction;
3777 Elf64_Sxword rel_value;
3779 rel_value = value - gp_val;
3780 if ((rel_value > 0x1fffff) || (rel_value < -0x1fffff))
3781 barf("GP-relative data out of range (address = 0x%lx, gp = 0x%lx)", value, gp_val);
3783 instruction = ia64_extract_instruction((Elf64_Xword *)target);
3784 instruction |= (((rel_value >> 0) & 0x07f) << 13) /* imm7b */
3785 | (((rel_value >> 7) & 0x1ff) << 27) /* imm9d */
3786 | (((rel_value >> 16) & 0x01f) << 22) /* imm5c */
3787 | ((Elf64_Xword)(rel_value < 0) << 36); /* s */
3788 ia64_deposit_instruction((Elf64_Xword *)target, instruction);
3792 ia64_reloc_pcrel21(Elf_Addr target, Elf_Addr value, ObjectCode *oc)
3794 Elf64_Xword instruction;
3795 Elf64_Sxword rel_value;
3798 entry = allocatePLTEntry(value, oc);
3800 rel_value = (entry >> 4) - (target >> 4);
3801 if ((rel_value > 0xfffff) || (rel_value < -0xfffff))
3802 barf("PLT entry too far away (entry = 0x%lx, target = 0x%lx)", entry, target);
3804 instruction = ia64_extract_instruction((Elf64_Xword *)target);
3805 instruction |= ((rel_value & 0xfffff) << 13) /* imm20b */
3806 | ((Elf64_Xword)(rel_value < 0) << 36); /* s */
3807 ia64_deposit_instruction((Elf64_Xword *)target, instruction);
3813 * PowerPC & X86_64 ELF specifics
3816 #if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
3818 static int ocAllocateSymbolExtras_ELF( ObjectCode *oc )
3824 ehdr = (Elf_Ehdr *) oc->image;
3825 shdr = (Elf_Shdr *) ( ((char *)oc->image) + ehdr->e_shoff );
3827 for( i = 0; i < ehdr->e_shnum; i++ )
3828 if( shdr[i].sh_type == SHT_SYMTAB )
3831 if( i == ehdr->e_shnum )
3833 errorBelch( "This ELF file contains no symtab" );
3837 if( shdr[i].sh_entsize != sizeof( Elf_Sym ) )
3839 errorBelch( "The entry size (%d) of the symtab isn't %d\n",
3840 (int) shdr[i].sh_entsize, (int) sizeof( Elf_Sym ) );
3845 return ocAllocateSymbolExtras( oc, shdr[i].sh_size / sizeof( Elf_Sym ), 0 );
3848 #endif /* powerpc */
3852 /* --------------------------------------------------------------------------
3854 * ------------------------------------------------------------------------*/
3856 #if defined(OBJFORMAT_MACHO)
3859 Support for MachO linking on Darwin/MacOS X
3860 by Wolfgang Thaller (wolfgang.thaller@gmx.net)
3862 I hereby formally apologize for the hackish nature of this code.
3863 Things that need to be done:
3864 *) implement ocVerifyImage_MachO
3865 *) add still more sanity checks.
3868 #if x86_64_HOST_ARCH || powerpc64_HOST_ARCH
3869 #define mach_header mach_header_64
3870 #define segment_command segment_command_64
3871 #define section section_64
3872 #define nlist nlist_64
3875 #ifdef powerpc_HOST_ARCH
3876 static int ocAllocateSymbolExtras_MachO(ObjectCode* oc)
3878 struct mach_header *header = (struct mach_header *) oc->image;
3879 struct load_command *lc = (struct load_command *) (header + 1);
3882 for( i = 0; i < header->ncmds; i++ )
3884 if( lc->cmd == LC_SYMTAB )
3886 // Find out the first and last undefined external
3887 // symbol, so we don't have to allocate too many
3889 struct symtab_command *symLC = (struct symtab_command *) lc;
3890 unsigned min = symLC->nsyms, max = 0;
3891 struct nlist *nlist =
3892 symLC ? (struct nlist*) ((char*) oc->image + symLC->symoff)
3894 for(i=0;i<symLC->nsyms;i++)
3896 if(nlist[i].n_type & N_STAB)
3898 else if(nlist[i].n_type & N_EXT)
3900 if((nlist[i].n_type & N_TYPE) == N_UNDF
3901 && (nlist[i].n_value == 0))
3911 return ocAllocateSymbolExtras(oc, max - min + 1, min);
3916 lc = (struct load_command *) ( ((char *)lc) + lc->cmdsize );
3918 return ocAllocateSymbolExtras(oc,0,0);
3921 #ifdef x86_64_HOST_ARCH
3922 static int ocAllocateSymbolExtras_MachO(ObjectCode* oc)
3924 struct mach_header *header = (struct mach_header *) oc->image;
3925 struct load_command *lc = (struct load_command *) (header + 1);
3928 for( i = 0; i < header->ncmds; i++ )
3930 if( lc->cmd == LC_SYMTAB )
3932 // Just allocate one entry for every symbol
3933 struct symtab_command *symLC = (struct symtab_command *) lc;
3935 return ocAllocateSymbolExtras(oc, symLC->nsyms, 0);
3938 lc = (struct load_command *) ( ((char *)lc) + lc->cmdsize );
3940 return ocAllocateSymbolExtras(oc,0,0);
3944 static int ocVerifyImage_MachO(ObjectCode* oc)
3946 char *image = (char*) oc->image;
3947 struct mach_header *header = (struct mach_header*) image;
3949 #if x86_64_TARGET_ARCH || powerpc64_TARGET_ARCH
3950 if(header->magic != MH_MAGIC_64)
3953 if(header->magic != MH_MAGIC)
3956 // FIXME: do some more verifying here
3960 static int resolveImports(
3963 struct symtab_command *symLC,
3964 struct section *sect, // ptr to lazy or non-lazy symbol pointer section
3965 unsigned long *indirectSyms,
3966 struct nlist *nlist)
3969 size_t itemSize = 4;
3972 int isJumpTable = 0;
3973 if(!strcmp(sect->sectname,"__jump_table"))
3977 ASSERT(sect->reserved2 == itemSize);
3981 for(i=0; i*itemSize < sect->size;i++)
3983 // according to otool, reserved1 contains the first index into the indirect symbol table
3984 struct nlist *symbol = &nlist[indirectSyms[sect->reserved1+i]];
3985 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
3988 if((symbol->n_type & N_TYPE) == N_UNDF
3989 && (symbol->n_type & N_EXT) && (symbol->n_value != 0))
3990 addr = (void*) (symbol->n_value);
3992 addr = lookupSymbol(nm);
3995 errorBelch("\n%s: unknown symbol `%s'", oc->fileName, nm);
4003 checkProddableBlock(oc,image + sect->offset + i*itemSize);
4004 *(image + sect->offset + i*itemSize) = 0xe9; // jmp
4005 *(unsigned*)(image + sect->offset + i*itemSize + 1)
4006 = (char*)addr - (image + sect->offset + i*itemSize + 5);
4011 checkProddableBlock(oc,((void**)(image + sect->offset)) + i);
4012 ((void**)(image + sect->offset))[i] = addr;
4019 static unsigned long relocateAddress(
4022 struct section* sections,
4023 unsigned long address)
4026 for(i = 0; i < nSections; i++)
4028 if(sections[i].addr <= address
4029 && address < sections[i].addr + sections[i].size)
4031 return (unsigned long)oc->image
4032 + sections[i].offset + address - sections[i].addr;
4035 barf("Invalid Mach-O file:"
4036 "Address out of bounds while relocating object file");
4040 static int relocateSection(
4043 struct symtab_command *symLC, struct nlist *nlist,
4044 int nSections, struct section* sections, struct section *sect)
4046 struct relocation_info *relocs;
4049 if(!strcmp(sect->sectname,"__la_symbol_ptr"))
4051 else if(!strcmp(sect->sectname,"__nl_symbol_ptr"))
4053 else if(!strcmp(sect->sectname,"__la_sym_ptr2"))
4055 else if(!strcmp(sect->sectname,"__la_sym_ptr3"))
4059 relocs = (struct relocation_info*) (image + sect->reloff);
4063 #ifdef x86_64_HOST_ARCH
4064 struct relocation_info *reloc = &relocs[i];
4066 char *thingPtr = image + sect->offset + reloc->r_address;
4068 /* We shouldn't need to initialise this, but gcc on OS X 64 bit
4069 complains that it may be used uninitialized if we don't */
4072 int type = reloc->r_type;
4074 checkProddableBlock(oc,thingPtr);
4075 switch(reloc->r_length)
4078 thing = *(uint8_t*)thingPtr;
4079 baseValue = (uint64_t)thingPtr + 1;
4082 thing = *(uint16_t*)thingPtr;
4083 baseValue = (uint64_t)thingPtr + 2;
4086 thing = *(uint32_t*)thingPtr;
4087 baseValue = (uint64_t)thingPtr + 4;
4090 thing = *(uint64_t*)thingPtr;
4091 baseValue = (uint64_t)thingPtr + 8;
4094 barf("Unknown size.");
4097 if(type == X86_64_RELOC_GOT
4098 || type == X86_64_RELOC_GOT_LOAD)
4100 ASSERT(reloc->r_extern);
4101 value = (uint64_t) &makeSymbolExtra(oc, reloc->r_symbolnum, value)->addr;
4103 type = X86_64_RELOC_SIGNED;
4105 else if(reloc->r_extern)
4107 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4108 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4109 if(symbol->n_value == 0)
4110 value = (uint64_t) lookupSymbol(nm);
4112 value = relocateAddress(oc, nSections, sections,
4117 value = sections[reloc->r_symbolnum-1].offset
4118 - sections[reloc->r_symbolnum-1].addr
4122 if(type == X86_64_RELOC_BRANCH)
4124 if((int32_t)(value - baseValue) != (int64_t)(value - baseValue))
4126 ASSERT(reloc->r_extern);
4127 value = (uint64_t) &makeSymbolExtra(oc, reloc->r_symbolnum, value)
4130 ASSERT((int32_t)(value - baseValue) == (int64_t)(value - baseValue));
4131 type = X86_64_RELOC_SIGNED;
4136 case X86_64_RELOC_UNSIGNED:
4137 ASSERT(!reloc->r_pcrel);
4140 case X86_64_RELOC_SIGNED:
4141 ASSERT(reloc->r_pcrel);
4142 thing += value - baseValue;
4144 case X86_64_RELOC_SUBTRACTOR:
4145 ASSERT(!reloc->r_pcrel);
4149 barf("unkown relocation");
4152 switch(reloc->r_length)
4155 *(uint8_t*)thingPtr = thing;
4158 *(uint16_t*)thingPtr = thing;
4161 *(uint32_t*)thingPtr = thing;
4164 *(uint64_t*)thingPtr = thing;
4168 if(relocs[i].r_address & R_SCATTERED)
4170 struct scattered_relocation_info *scat =
4171 (struct scattered_relocation_info*) &relocs[i];
4175 if(scat->r_length == 2)
4177 unsigned long word = 0;
4178 unsigned long* wordPtr = (unsigned long*) (image + sect->offset + scat->r_address);
4179 checkProddableBlock(oc,wordPtr);
4181 // Note on relocation types:
4182 // i386 uses the GENERIC_RELOC_* types,
4183 // while ppc uses special PPC_RELOC_* types.
4184 // *_RELOC_VANILLA and *_RELOC_PAIR have the same value
4185 // in both cases, all others are different.
4186 // Therefore, we use GENERIC_RELOC_VANILLA
4187 // and GENERIC_RELOC_PAIR instead of the PPC variants,
4188 // and use #ifdefs for the other types.
4190 // Step 1: Figure out what the relocated value should be
4191 if(scat->r_type == GENERIC_RELOC_VANILLA)
4193 word = *wordPtr + (unsigned long) relocateAddress(
4200 #ifdef powerpc_HOST_ARCH
4201 else if(scat->r_type == PPC_RELOC_SECTDIFF
4202 || scat->r_type == PPC_RELOC_LO16_SECTDIFF
4203 || scat->r_type == PPC_RELOC_HI16_SECTDIFF
4204 || scat->r_type == PPC_RELOC_HA16_SECTDIFF)
4206 else if(scat->r_type == GENERIC_RELOC_SECTDIFF)
4209 struct scattered_relocation_info *pair =
4210 (struct scattered_relocation_info*) &relocs[i+1];
4212 if(!pair->r_scattered || pair->r_type != GENERIC_RELOC_PAIR)
4213 barf("Invalid Mach-O file: "
4214 "RELOC_*_SECTDIFF not followed by RELOC_PAIR");
4216 word = (unsigned long)
4217 (relocateAddress(oc, nSections, sections, scat->r_value)
4218 - relocateAddress(oc, nSections, sections, pair->r_value));
4221 #ifdef powerpc_HOST_ARCH
4222 else if(scat->r_type == PPC_RELOC_HI16
4223 || scat->r_type == PPC_RELOC_LO16
4224 || scat->r_type == PPC_RELOC_HA16
4225 || scat->r_type == PPC_RELOC_LO14)
4226 { // these are generated by label+offset things
4227 struct relocation_info *pair = &relocs[i+1];
4228 if((pair->r_address & R_SCATTERED) || pair->r_type != PPC_RELOC_PAIR)
4229 barf("Invalid Mach-O file: "
4230 "PPC_RELOC_* not followed by PPC_RELOC_PAIR");
4232 if(scat->r_type == PPC_RELOC_LO16)
4234 word = ((unsigned short*) wordPtr)[1];
4235 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4237 else if(scat->r_type == PPC_RELOC_LO14)
4239 barf("Unsupported Relocation: PPC_RELOC_LO14");
4240 word = ((unsigned short*) wordPtr)[1] & 0xFFFC;
4241 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4243 else if(scat->r_type == PPC_RELOC_HI16)
4245 word = ((unsigned short*) wordPtr)[1] << 16;
4246 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF);
4248 else if(scat->r_type == PPC_RELOC_HA16)
4250 word = ((unsigned short*) wordPtr)[1] << 16;
4251 word += ((short)relocs[i+1].r_address & (short)0xFFFF);
4255 word += (unsigned long) relocateAddress(oc, nSections, sections, scat->r_value)
4262 continue; // ignore the others
4264 #ifdef powerpc_HOST_ARCH
4265 if(scat->r_type == GENERIC_RELOC_VANILLA
4266 || scat->r_type == PPC_RELOC_SECTDIFF)
4268 if(scat->r_type == GENERIC_RELOC_VANILLA
4269 || scat->r_type == GENERIC_RELOC_SECTDIFF)
4274 #ifdef powerpc_HOST_ARCH
4275 else if(scat->r_type == PPC_RELOC_LO16_SECTDIFF || scat->r_type == PPC_RELOC_LO16)
4277 ((unsigned short*) wordPtr)[1] = word & 0xFFFF;
4279 else if(scat->r_type == PPC_RELOC_HI16_SECTDIFF || scat->r_type == PPC_RELOC_HI16)
4281 ((unsigned short*) wordPtr)[1] = (word >> 16) & 0xFFFF;
4283 else if(scat->r_type == PPC_RELOC_HA16_SECTDIFF || scat->r_type == PPC_RELOC_HA16)
4285 ((unsigned short*) wordPtr)[1] = ((word >> 16) & 0xFFFF)
4286 + ((word & (1<<15)) ? 1 : 0);
4292 continue; // FIXME: I hope it's OK to ignore all the others.
4296 struct relocation_info *reloc = &relocs[i];
4297 if(reloc->r_pcrel && !reloc->r_extern)
4300 if(reloc->r_length == 2)
4302 unsigned long word = 0;
4303 #ifdef powerpc_HOST_ARCH
4304 unsigned long jumpIsland = 0;
4305 long offsetToJumpIsland = 0xBADBAD42; // initialise to bad value
4306 // to avoid warning and to catch
4310 unsigned long* wordPtr = (unsigned long*) (image + sect->offset + reloc->r_address);
4311 checkProddableBlock(oc,wordPtr);
4313 if(reloc->r_type == GENERIC_RELOC_VANILLA)
4317 #ifdef powerpc_HOST_ARCH
4318 else if(reloc->r_type == PPC_RELOC_LO16)
4320 word = ((unsigned short*) wordPtr)[1];
4321 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF) << 16;
4323 else if(reloc->r_type == PPC_RELOC_HI16)
4325 word = ((unsigned short*) wordPtr)[1] << 16;
4326 word |= ((unsigned long) relocs[i+1].r_address & 0xFFFF);
4328 else if(reloc->r_type == PPC_RELOC_HA16)
4330 word = ((unsigned short*) wordPtr)[1] << 16;
4331 word += ((short)relocs[i+1].r_address & (short)0xFFFF);
4333 else if(reloc->r_type == PPC_RELOC_BR24)
4336 word = (word & 0x03FFFFFC) | ((word & 0x02000000) ? 0xFC000000 : 0);
4340 if(!reloc->r_extern)
4343 sections[reloc->r_symbolnum-1].offset
4344 - sections[reloc->r_symbolnum-1].addr
4351 struct nlist *symbol = &nlist[reloc->r_symbolnum];
4352 char *nm = image + symLC->stroff + symbol->n_un.n_strx;
4353 void *symbolAddress = lookupSymbol(nm);
4356 errorBelch("\nunknown symbol `%s'", nm);
4362 #ifdef powerpc_HOST_ARCH
4363 // In the .o file, this should be a relative jump to NULL
4364 // and we'll change it to a relative jump to the symbol
4365 ASSERT(word + reloc->r_address == 0);
4366 jumpIsland = (unsigned long)
4367 &makeSymbolExtra(oc,
4369 (unsigned long) symbolAddress)
4373 offsetToJumpIsland = word + jumpIsland
4374 - (((long)image) + sect->offset - sect->addr);
4377 word += (unsigned long) symbolAddress
4378 - (((long)image) + sect->offset - sect->addr);
4382 word += (unsigned long) symbolAddress;
4386 if(reloc->r_type == GENERIC_RELOC_VANILLA)
4391 #ifdef powerpc_HOST_ARCH
4392 else if(reloc->r_type == PPC_RELOC_LO16)
4394 ((unsigned short*) wordPtr)[1] = word & 0xFFFF;
4397 else if(reloc->r_type == PPC_RELOC_HI16)
4399 ((unsigned short*) wordPtr)[1] = (word >> 16) & 0xFFFF;
4402 else if(reloc->r_type == PPC_RELOC_HA16)
4404 ((unsigned short*) wordPtr)[1] = ((word >> 16) & 0xFFFF)
4405 + ((word & (1<<15)) ? 1 : 0);
4408 else if(reloc->r_type == PPC_RELOC_BR24)
4410 if((long)word > (long)0x01FFFFFF || (long)word < (long)0xFFE00000)
4412 // The branch offset is too large.
4413 // Therefore, we try to use a jump island.
4416 barf("unconditional relative branch out of range: "
4417 "no jump island available");
4420 word = offsetToJumpIsland;
4421 if((long)word > (long)0x01FFFFFF || (long)word < (long)0xFFE00000)
4422 barf("unconditional relative branch out of range: "
4423 "jump island out of range");
4425 *wordPtr = (*wordPtr & 0xFC000003) | (word & 0x03FFFFFC);
4430 barf("\nunknown relocation %d",reloc->r_type);
4438 static int ocGetNames_MachO(ObjectCode* oc)
4440 char *image = (char*) oc->image;
4441 struct mach_header *header = (struct mach_header*) image;
4442 struct load_command *lc = (struct load_command*) (image + sizeof(struct mach_header));
4443 unsigned i,curSymbol = 0;
4444 struct segment_command *segLC = NULL;
4445 struct section *sections;
4446 struct symtab_command *symLC = NULL;
4447 struct nlist *nlist;
4448 unsigned long commonSize = 0;
4449 char *commonStorage = NULL;
4450 unsigned long commonCounter;
4452 for(i=0;i<header->ncmds;i++)
4454 if(lc->cmd == LC_SEGMENT || lc->cmd == LC_SEGMENT_64)
4455 segLC = (struct segment_command*) lc;
4456 else if(lc->cmd == LC_SYMTAB)
4457 symLC = (struct symtab_command*) lc;
4458 lc = (struct load_command *) ( ((char*)lc) + lc->cmdsize );
4461 sections = (struct section*) (segLC+1);
4462 nlist = symLC ? (struct nlist*) (image + symLC->symoff)
4466 barf("ocGetNames_MachO: no segment load command");
4468 for(i=0;i<segLC->nsects;i++)
4470 if(sections[i].size == 0)
4473 if((sections[i].flags & SECTION_TYPE) == S_ZEROFILL)
4475 char * zeroFillArea = stgCallocBytes(1,sections[i].size,
4476 "ocGetNames_MachO(common symbols)");
4477 sections[i].offset = zeroFillArea - image;
4480 if(!strcmp(sections[i].sectname,"__text"))
4481 addSection(oc, SECTIONKIND_CODE_OR_RODATA,
4482 (void*) (image + sections[i].offset),
4483 (void*) (image + sections[i].offset + sections[i].size));
4484 else if(!strcmp(sections[i].sectname,"__const"))
4485 addSection(oc, SECTIONKIND_RWDATA,
4486 (void*) (image + sections[i].offset),
4487 (void*) (image + sections[i].offset + sections[i].size));
4488 else if(!strcmp(sections[i].sectname,"__data"))
4489 addSection(oc, SECTIONKIND_RWDATA,
4490 (void*) (image + sections[i].offset),
4491 (void*) (image + sections[i].offset + sections[i].size));
4492 else if(!strcmp(sections[i].sectname,"__bss")
4493 || !strcmp(sections[i].sectname,"__common"))
4494 addSection(oc, SECTIONKIND_RWDATA,
4495 (void*) (image + sections[i].offset),
4496 (void*) (image + sections[i].offset + sections[i].size));
4498 addProddableBlock(oc, (void*) (image + sections[i].offset),
4502 // count external symbols defined here
4506 for(i=0;i<symLC->nsyms;i++)
4508 if(nlist[i].n_type & N_STAB)
4510 else if(nlist[i].n_type & N_EXT)
4512 if((nlist[i].n_type & N_TYPE) == N_UNDF
4513 && (nlist[i].n_value != 0))
4515 commonSize += nlist[i].n_value;
4518 else if((nlist[i].n_type & N_TYPE) == N_SECT)
4523 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
4524 "ocGetNames_MachO(oc->symbols)");
4528 for(i=0;i<symLC->nsyms;i++)
4530 if(nlist[i].n_type & N_STAB)
4532 else if((nlist[i].n_type & N_TYPE) == N_SECT)
4534 if(nlist[i].n_type & N_EXT)
4536 char *nm = image + symLC->stroff + nlist[i].n_un.n_strx;
4537 if((nlist[i].n_desc & N_WEAK_DEF) && lookupSymbol(nm))
4538 ; // weak definition, and we already have a definition
4541 ghciInsertStrHashTable(oc->fileName, symhash, nm,
4543 + sections[nlist[i].n_sect-1].offset
4544 - sections[nlist[i].n_sect-1].addr
4545 + nlist[i].n_value);
4546 oc->symbols[curSymbol++] = nm;
4553 commonStorage = stgCallocBytes(1,commonSize,"ocGetNames_MachO(common symbols)");
4554 commonCounter = (unsigned long)commonStorage;
4557 for(i=0;i<symLC->nsyms;i++)
4559 if((nlist[i].n_type & N_TYPE) == N_UNDF
4560 && (nlist[i].n_type & N_EXT) && (nlist[i].n_value != 0))
4562 char *nm = image + symLC->stroff + nlist[i].n_un.n_strx;
4563 unsigned long sz = nlist[i].n_value;
4565 nlist[i].n_value = commonCounter;
4567 ghciInsertStrHashTable(oc->fileName, symhash, nm,
4568 (void*)commonCounter);
4569 oc->symbols[curSymbol++] = nm;
4571 commonCounter += sz;
4578 static int ocResolve_MachO(ObjectCode* oc)
4580 char *image = (char*) oc->image;
4581 struct mach_header *header = (struct mach_header*) image;
4582 struct load_command *lc = (struct load_command*) (image + sizeof(struct mach_header));
4584 struct segment_command *segLC = NULL;
4585 struct section *sections;
4586 struct symtab_command *symLC = NULL;
4587 struct dysymtab_command *dsymLC = NULL;
4588 struct nlist *nlist;
4590 for(i=0;i<header->ncmds;i++)
4592 if(lc->cmd == LC_SEGMENT || lc->cmd == LC_SEGMENT_64)
4593 segLC = (struct segment_command*) lc;
4594 else if(lc->cmd == LC_SYMTAB)
4595 symLC = (struct symtab_command*) lc;
4596 else if(lc->cmd == LC_DYSYMTAB)
4597 dsymLC = (struct dysymtab_command*) lc;
4598 lc = (struct load_command *) ( ((char*)lc) + lc->cmdsize );
4601 sections = (struct section*) (segLC+1);
4602 nlist = symLC ? (struct nlist*) (image + symLC->symoff)
4607 unsigned long *indirectSyms
4608 = (unsigned long*) (image + dsymLC->indirectsymoff);
4610 for(i=0;i<segLC->nsects;i++)
4612 if( !strcmp(sections[i].sectname,"__la_symbol_ptr")
4613 || !strcmp(sections[i].sectname,"__la_sym_ptr2")
4614 || !strcmp(sections[i].sectname,"__la_sym_ptr3"))
4616 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
4619 else if(!strcmp(sections[i].sectname,"__nl_symbol_ptr")
4620 || !strcmp(sections[i].sectname,"__pointers"))
4622 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
4625 else if(!strcmp(sections[i].sectname,"__jump_table"))
4627 if(!resolveImports(oc,image,symLC,§ions[i],indirectSyms,nlist))
4633 for(i=0;i<segLC->nsects;i++)
4635 if(!relocateSection(oc,image,symLC,nlist,segLC->nsects,sections,§ions[i]))
4639 #if defined (powerpc_HOST_ARCH)
4640 ocFlushInstructionCache( oc );
4646 #ifdef powerpc_HOST_ARCH
4648 * The Mach-O object format uses leading underscores. But not everywhere.
4649 * There is a small number of runtime support functions defined in
4650 * libcc_dynamic.a whose name does not have a leading underscore.
4651 * As a consequence, we can't get their address from C code.
4652 * We have to use inline assembler just to take the address of a function.
4656 static void machoInitSymbolsWithoutUnderscore()
4658 extern void* symbolsWithoutUnderscore[];
4659 void **p = symbolsWithoutUnderscore;
4660 __asm__ volatile(".globl _symbolsWithoutUnderscore\n.data\n_symbolsWithoutUnderscore:");
4662 #undef SymI_NeedsProto
4663 #define SymI_NeedsProto(x) \
4664 __asm__ volatile(".long " # x);
4666 RTS_MACHO_NOUNDERLINE_SYMBOLS
4668 __asm__ volatile(".text");
4670 #undef SymI_NeedsProto
4671 #define SymI_NeedsProto(x) \
4672 ghciInsertStrHashTable("(GHCi built-in symbols)", symhash, #x, *p++);
4674 RTS_MACHO_NOUNDERLINE_SYMBOLS
4676 #undef SymI_NeedsProto
4681 * Figure out by how much to shift the entire Mach-O file in memory
4682 * when loading so that its single segment ends up 16-byte-aligned
4684 static int machoGetMisalignment( FILE * f )
4686 struct mach_header header;
4689 fread(&header, sizeof(header), 1, f);
4692 #if x86_64_TARGET_ARCH || powerpc64_TARGET_ARCH
4693 if(header.magic != MH_MAGIC_64)
4696 if(header.magic != MH_MAGIC)
4700 misalignment = (header.sizeofcmds + sizeof(header))
4703 return misalignment ? (16 - misalignment) : 0;