Linker.c 163 KB
Newer Older
1 2
/* -----------------------------------------------------------------------------
 *
3
 * (c) The GHC Team, 2000-2004
4 5 6 7 8
 *
 * RTS Object Linker
 *
 * ---------------------------------------------------------------------------*/

sof's avatar
sof committed
9
#if 0
10
#include "PosixSource.h"
sof's avatar
sof committed
11
#endif
12

13
/* Linux needs _GNU_SOURCE to get RTLD_DEFAULT from <dlfcn.h> and
14 15
   MREMAP_MAYMOVE from <sys/mman.h>.
 */
16 17 18 19
#ifdef __linux__
#define _GNU_SOURCE
#endif

20 21
#include "Rts.h"
#include "HsFFI.h"
Simon Marlow's avatar
Simon Marlow committed
22 23

#include "sm/Storage.h"
Simon Marlow's avatar
Simon Marlow committed
24
#include "Stats.h"
25
#include "Hash.h"
26
#include "LinkerInternals.h"
27
#include "RtsUtils.h"
28
#include "Trace.h"
Simon Marlow's avatar
Simon Marlow committed
29 30 31 32 33 34
#include "StgPrimFloat.h" // for __int_encodeFloat etc.
#include "Stable.h"

#if !defined(mingw32_HOST_OS)
#include "posix/Signals.h"
#endif
35

Simon Marlow's avatar
Simon Marlow committed
36 37 38 39 40
#if defined(mingw32_HOST_OS)
// get protos for is*()
#include <ctype.h>
#endif

41
#ifdef HAVE_SYS_TYPES_H
42
#include <sys/types.h>
43 44
#endif

45 46
#include <stdlib.h>
#include <string.h>
47 48
#include <stdio.h>
#include <assert.h>
49

50
#ifdef HAVE_SYS_STAT_H
51
#include <sys/stat.h>
52
#endif
53

54
#if defined(HAVE_DLFCN_H)
55
#include <dlfcn.h>
56
#endif
57

58
#if defined(cygwin32_HOST_OS)
sof's avatar
sof committed
59 60 61 62 63 64 65 66 67 68 69 70 71 72 73
#ifdef HAVE_DIRENT_H
#include <dirent.h>
#endif

#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include <regex.h>
#include <sys/fcntl.h>
#include <sys/termios.h>
#include <sys/utime.h>
#include <sys/utsname.h>
#include <sys/wait.h>
#endif

74
#if defined(linux_HOST_OS) || defined(freebsd_HOST_OS) || defined(dragonfly_HOST_OS) || defined(netbsd_HOST_OS) || defined(openbsd_HOST_OS) || defined(darwin_HOST_OS)
75 76 77
#define USE_MMAP
#include <fcntl.h>
#include <sys/mman.h>
dons's avatar
dons committed
78 79 80 81 82

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

83 84
#endif

Simon Marlow's avatar
Simon Marlow committed
85
#if defined(linux_HOST_OS) || defined(solaris2_HOST_OS) || defined(freebsd_HOST_OS) || defined(dragonfly_HOST_OS) || defined(netbsd_HOST_OS) || defined(openbsd_HOST_OS)
86
#  define OBJFORMAT_ELF
87 88
#  include <regex.h>	// regex is already used by dlopen() so this is OK
			// to use here without requiring an additional lib
89
#elif defined(cygwin32_HOST_OS) || defined (mingw32_HOST_OS)
90
#  define OBJFORMAT_PEi386
91
#  include <windows.h>
sof's avatar
sof committed
92
#  include <math.h>
93
#elif defined(darwin_HOST_OS)
94
#  define OBJFORMAT_MACHO
95
#  include <regex.h>
96 97 98
#  include <mach-o/loader.h>
#  include <mach-o/nlist.h>
#  include <mach-o/reloc.h>
99
#if !defined(HAVE_DLFCN_H)
100
#  include <mach-o/dyld.h>
101
#endif
102 103 104
#if defined(powerpc_HOST_ARCH)
#  include <mach-o/ppc/reloc.h>
#endif
105 106 107
#if defined(x86_64_HOST_ARCH)
#  include <mach-o/x86_64/reloc.h>
#endif
108 109
#endif

110 111 112 113
#if defined(x86_64_HOST_ARCH) && defined(darwin_HOST_OS)
#define ALWAYS_PIC
#endif

114
/* Hash table mapping symbol names to Symbol */
115
static /*Str*/HashTable *symhash;
116

117 118 119
/* Hash table mapping symbol names to StgStablePtr */
static /*Str*/HashTable *stablehash;

120 121 122
/* List of currently loaded objects */
ObjectCode *objects = NULL;	/* initially empty */

123
#if defined(OBJFORMAT_ELF)
124 125 126
static int ocVerifyImage_ELF    ( ObjectCode* oc );
static int ocGetNames_ELF       ( ObjectCode* oc );
static int ocResolve_ELF        ( ObjectCode* oc );
127
#if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
128
static int ocAllocateSymbolExtras_ELF ( ObjectCode* oc );
129
#endif
130
#elif defined(OBJFORMAT_PEi386)
131 132 133
static int ocVerifyImage_PEi386 ( ObjectCode* oc );
static int ocGetNames_PEi386    ( ObjectCode* oc );
static int ocResolve_PEi386     ( ObjectCode* oc );
134 135
static void *lookupSymbolInDLLs ( unsigned char *lbl );
static void zapTrailingAtSign   ( unsigned char *sym );
136 137 138 139
#elif defined(OBJFORMAT_MACHO)
static int ocVerifyImage_MachO    ( ObjectCode* oc );
static int ocGetNames_MachO       ( ObjectCode* oc );
static int ocResolve_MachO        ( ObjectCode* oc );
140

Ian Lynagh's avatar
Ian Lynagh committed
141
#ifndef USE_MMAP
142
static int machoGetMisalignment( FILE * );
Ian Lynagh's avatar
Ian Lynagh committed
143
#endif
144 145 146
#if defined(powerpc_HOST_ARCH) || defined(x86_64_HOST_ARCH)
static int ocAllocateSymbolExtras_MachO ( ObjectCode* oc );
#endif
147
#ifdef powerpc_HOST_ARCH
148
static void machoInitSymbolsWithoutUnderscore( void );
149
#endif
150
#endif
151

152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173
/* on x86_64 we have a problem with relocating symbol references in
 * code that was compiled without -fPIC.  By default, the small memory
 * model is used, which assumes that symbol references can fit in a
 * 32-bit slot.  The system dynamic linker makes this work for
 * references to shared libraries by either (a) allocating a jump
 * table slot for code references, or (b) moving the symbol at load
 * time (and copying its contents, if necessary) for data references.
 *
 * We unfortunately can't tell whether symbol references are to code
 * or data.  So for now we assume they are code (the vast majority
 * are), and allocate jump-table slots.  Unfortunately this will
 * SILENTLY generate crashing code for data references.  This hack is
 * enabled by X86_64_ELF_NONPIC_HACK.
 * 
 * One workaround is to use shared Haskell libraries.  This is
 * coming.  Another workaround is to keep the static libraries but
 * compile them with -fPIC, because that will generate PIC references
 * to data which can be relocated.  The PIC code is still too green to
 * do this systematically, though.
 *
 * See bug #781
 * See thread http://www.haskell.org/pipermail/cvs-ghc/2007-September/038458.html
174 175 176 177 178 179 180 181 182 183 184 185
 *
 * Naming Scheme for Symbol Macros
 *
 * SymI_*: symbol is internal to the RTS. It resides in an object
 *         file/library that is statically.
 * SymE_*: symbol is external to the RTS library. It might be linked
 *         dynamically.
 *
 * Sym*_HasProto  : the symbol prototype is imported in an include file
 *                  or defined explicitly
 * Sym*_NeedsProto: the symbol is undefined and we add a dummy
 *                  default proto extern void sym(void);
186 187
 */
#define X86_64_ELF_NONPIC_HACK 1
188

189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214
/* Link objects into the lower 2Gb on x86_64.  GHC assumes the
 * small memory model on this architecture (see gcc docs,
 * -mcmodel=small).
 *
 * MAP_32BIT not available on OpenBSD/amd64
 */
#if defined(x86_64_HOST_ARCH) && defined(MAP_32BIT)
#define TRY_MAP_32BIT MAP_32BIT
#else
#define TRY_MAP_32BIT 0
#endif

/*
 * Due to the small memory model (see above), on x86_64 we have to map
 * all our non-PIC object files into the low 2Gb of the address space
 * (why 2Gb and not 4Gb?  Because all addresses must be reachable
 * using a 32-bit signed PC-relative offset). On Linux we can do this
 * using the MAP_32BIT flag to mmap(), however on other OSs
 * (e.g. *BSD, see #2063, and also on Linux inside Xen, see #2512), we
 * can't do this.  So on these systems, we have to pick a base address
 * in the low 2Gb of the address space and try to allocate memory from
 * there.
 *
 * We pick a default address based on the OS, but also make this
 * configurable via an RTS flag (+RTS -xm)
 */
215
#if !defined(ALWAYS_PIC) && defined(x86_64_HOST_ARCH)
216 217 218 219 220 221 222 223 224

#if defined(MAP_32BIT)
// Try to use MAP_32BIT
#define MMAP_32BIT_BASE_DEFAULT 0
#else
// A guess: 1Gb.
#define MMAP_32BIT_BASE_DEFAULT 0x40000000
#endif

Ian Lynagh's avatar
Ian Lynagh committed
225
static void *mmap_32bit_base = (void *)MMAP_32BIT_BASE_DEFAULT;
226 227 228 229 230 231 232
#endif

/* MAP_ANONYMOUS is MAP_ANON on some systems, e.g. OpenBSD */
#if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
#define MAP_ANONYMOUS MAP_ANON
#endif

233 234 235 236
/* -----------------------------------------------------------------------------
 * Built-in symbols from the RTS
 */

237 238 239 240 241
typedef struct _RtsSymbolVal {
    char   *lbl;
    void   *addr;
} RtsSymbolVal;

242 243 244 245
#define Maybe_Stable_Names      SymI_HasProto(stg_mkWeakzh)			\
      				SymI_HasProto(stg_mkWeakForeignEnvzh)		\
      				SymI_HasProto(stg_makeStableNamezh)		\
      				SymI_HasProto(stg_finalizzeWeakzh)
246

247
#if !defined (mingw32_HOST_OS)
248
#define RTS_POSIX_ONLY_SYMBOLS                  \
Simon Marlow's avatar
Simon Marlow committed
249 250
      SymI_HasProto(__hscore_get_saved_termios)	\
      SymI_HasProto(__hscore_set_saved_termios)	\
251
      SymI_HasProto(shutdownHaskellAndSignal)	\
Simon Marlow's avatar
Simon Marlow committed
252 253
      SymI_HasProto(lockFile)                   \
      SymI_HasProto(unlockFile)                 \
254 255 256
      SymI_HasProto(signal_handlers)		\
      SymI_HasProto(stg_sig_install)		\
      SymI_NeedsProto(nocldstop)
sof's avatar
sof committed
257
#endif
258

259
#if defined (cygwin32_HOST_OS)
sof's avatar
sof committed
260 261 262
#define RTS_MINGW_ONLY_SYMBOLS /**/
/* Don't have the ability to read import libs / archives, so
 * we have to stupidly list a lot of what libcygwin.a
263
 * exports; sigh.
sof's avatar
sof committed
264
 */
265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341
#define RTS_CYGWIN_ONLY_SYMBOLS                          \
      SymI_HasProto(regfree)                             \
      SymI_HasProto(regexec)                             \
      SymI_HasProto(regerror)                            \
      SymI_HasProto(regcomp)                             \
      SymI_HasProto(__errno)                             \
      SymI_HasProto(access)                              \
      SymI_HasProto(chmod)                               \
      SymI_HasProto(chdir)                               \
      SymI_HasProto(close)                               \
      SymI_HasProto(creat)                               \
      SymI_HasProto(dup)                                 \
      SymI_HasProto(dup2)                                \
      SymI_HasProto(fstat)                               \
      SymI_HasProto(fcntl)                               \
      SymI_HasProto(getcwd)                              \
      SymI_HasProto(getenv)                              \
      SymI_HasProto(lseek)                               \
      SymI_HasProto(open)                                \
      SymI_HasProto(fpathconf)                           \
      SymI_HasProto(pathconf)                            \
      SymI_HasProto(stat)                                \
      SymI_HasProto(pow)                                 \
      SymI_HasProto(tanh)                                \
      SymI_HasProto(cosh)                                \
      SymI_HasProto(sinh)                                \
      SymI_HasProto(atan)                                \
      SymI_HasProto(acos)                                \
      SymI_HasProto(asin)                                \
      SymI_HasProto(tan)                                 \
      SymI_HasProto(cos)                                 \
      SymI_HasProto(sin)                                 \
      SymI_HasProto(exp)                                 \
      SymI_HasProto(log)                                 \
      SymI_HasProto(sqrt)                                \
      SymI_HasProto(localtime_r)                         \
      SymI_HasProto(gmtime_r)                            \
      SymI_HasProto(mktime)                              \
      SymI_NeedsProto(_imp___tzname)                     \
      SymI_HasProto(gettimeofday)                        \
      SymI_HasProto(timezone)                            \
      SymI_HasProto(tcgetattr)                           \
      SymI_HasProto(tcsetattr)                           \
      SymI_HasProto(memcpy)                              \
      SymI_HasProto(memmove)                             \
      SymI_HasProto(realloc)                             \
      SymI_HasProto(malloc)                              \
      SymI_HasProto(free)                                \
      SymI_HasProto(fork)                                \
      SymI_HasProto(lstat)                               \
      SymI_HasProto(isatty)                              \
      SymI_HasProto(mkdir)                               \
      SymI_HasProto(opendir)                             \
      SymI_HasProto(readdir)                             \
      SymI_HasProto(rewinddir)                           \
      SymI_HasProto(closedir)                            \
      SymI_HasProto(link)                                \
      SymI_HasProto(mkfifo)                              \
      SymI_HasProto(pipe)                                \
      SymI_HasProto(read)                                \
      SymI_HasProto(rename)                              \
      SymI_HasProto(rmdir)                               \
      SymI_HasProto(select)                              \
      SymI_HasProto(system)                              \
      SymI_HasProto(write)                               \
      SymI_HasProto(strcmp)                              \
      SymI_HasProto(strcpy)                              \
      SymI_HasProto(strncpy)                             \
      SymI_HasProto(strerror)                            \
      SymI_HasProto(sigaddset)                           \
      SymI_HasProto(sigemptyset)                         \
      SymI_HasProto(sigprocmask)                         \
      SymI_HasProto(umask)                               \
      SymI_HasProto(uname)                               \
      SymI_HasProto(unlink)                              \
      SymI_HasProto(utime)                               \
      SymI_HasProto(waitpid)
342

343
#elif !defined(mingw32_HOST_OS)
sof's avatar
sof committed
344 345
#define RTS_MINGW_ONLY_SYMBOLS /**/
#define RTS_CYGWIN_ONLY_SYMBOLS /**/
346
#else /* defined(mingw32_HOST_OS) */
sof's avatar
sof committed
347 348
#define RTS_POSIX_ONLY_SYMBOLS  /**/
#define RTS_CYGWIN_ONLY_SYMBOLS /**/
349

350 351 352
/* Extra syms gen'ed by mingw-2's gcc-3.2: */
#if __GNUC__>=3
#define RTS_MINGW_EXTRA_SYMS                    \
353 354
      SymI_NeedsProto(_imp____mb_cur_max)       \
      SymI_NeedsProto(_imp___pctype)
355 356 357 358
#else
#define RTS_MINGW_EXTRA_SYMS
#endif

359
#if HAVE_GETTIMEOFDAY
360
#define RTS_MINGW_GETTIMEOFDAY_SYM SymI_NeedsProto(gettimeofday)
361 362 363 364
#else
#define RTS_MINGW_GETTIMEOFDAY_SYM /**/
#endif

365 366 367 368 369 370
#if HAVE___MINGW_VFPRINTF
#define RTS___MINGW_VFPRINTF_SYM SymI_HasProto(__mingw_vfprintf)
#else
#define RTS___MINGW_VFPRINTF_SYM /**/
#endif

371 372
/* These are statically linked from the mingw libraries into the ghc
   executable, so we have to employ this hack. */
373
#define RTS_MINGW_ONLY_SYMBOLS                           \
374 375 376
      SymI_HasProto(stg_asyncReadzh)			 \
      SymI_HasProto(stg_asyncWritezh)			 \
      SymI_HasProto(stg_asyncDoProczh)			 \
377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398
      SymI_HasProto(memset)                              \
      SymI_HasProto(inet_ntoa)                           \
      SymI_HasProto(inet_addr)                           \
      SymI_HasProto(htonl)                               \
      SymI_HasProto(recvfrom)                            \
      SymI_HasProto(listen)                              \
      SymI_HasProto(bind)                                \
      SymI_HasProto(shutdown)                            \
      SymI_HasProto(connect)                             \
      SymI_HasProto(htons)                               \
      SymI_HasProto(ntohs)                               \
      SymI_HasProto(getservbyname)                       \
      SymI_HasProto(getservbyport)                       \
      SymI_HasProto(getprotobynumber)                    \
      SymI_HasProto(getprotobyname)                      \
      SymI_HasProto(gethostbyname)                       \
      SymI_HasProto(gethostbyaddr)                       \
      SymI_HasProto(gethostname)                         \
      SymI_HasProto(strcpy)                              \
      SymI_HasProto(strncpy)                             \
      SymI_HasProto(abort)                               \
      SymI_NeedsProto(_alloca)                           \
Simon Marlow's avatar
Simon Marlow committed
399 400 401 402 403 404 405 406 407 408 409
      SymI_HasProto(isxdigit)                          \
      SymI_HasProto(isupper)                           \
      SymI_HasProto(ispunct)                           \
      SymI_HasProto(islower)                           \
      SymI_HasProto(isspace)                           \
      SymI_HasProto(isprint)                           \
      SymI_HasProto(isdigit)                           \
      SymI_HasProto(iscntrl)                           \
      SymI_HasProto(isalpha)                           \
      SymI_HasProto(isalnum)                           \
      SymI_HasProto(isascii)                           \
410
      RTS___MINGW_VFPRINTF_SYM                           \
411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440
      SymI_HasProto(strcmp)                              \
      SymI_HasProto(memmove)                             \
      SymI_HasProto(realloc)                             \
      SymI_HasProto(malloc)                              \
      SymI_HasProto(pow)                                 \
      SymI_HasProto(tanh)                                \
      SymI_HasProto(cosh)                                \
      SymI_HasProto(sinh)                                \
      SymI_HasProto(atan)                                \
      SymI_HasProto(acos)                                \
      SymI_HasProto(asin)                                \
      SymI_HasProto(tan)                                 \
      SymI_HasProto(cos)                                 \
      SymI_HasProto(sin)                                 \
      SymI_HasProto(exp)                                 \
      SymI_HasProto(log)                                 \
      SymI_HasProto(sqrt)                                \
      SymI_HasProto(powf)                                \
      SymI_HasProto(tanhf)                               \
      SymI_HasProto(coshf)                               \
      SymI_HasProto(sinhf)                               \
      SymI_HasProto(atanf)                               \
      SymI_HasProto(acosf)                               \
      SymI_HasProto(asinf)                               \
      SymI_HasProto(tanf)                                \
      SymI_HasProto(cosf)                                \
      SymI_HasProto(sinf)                                \
      SymI_HasProto(expf)                                \
      SymI_HasProto(logf)                                \
      SymI_HasProto(sqrtf)                               \
441 442 443 444
      SymI_HasProto(erf)                                \
      SymI_HasProto(erfc)                                \
      SymI_HasProto(erff)                                \
      SymI_HasProto(erfcf)                               \
445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461
      SymI_HasProto(memcpy)                              \
      SymI_HasProto(rts_InstallConsoleEvent)             \
      SymI_HasProto(rts_ConsoleHandlerDone)              \
      SymI_NeedsProto(mktime)                            \
      SymI_NeedsProto(_imp___timezone)                   \
      SymI_NeedsProto(_imp___tzname)                     \
      SymI_NeedsProto(_imp__tzname)                      \
      SymI_NeedsProto(_imp___iob)                        \
      SymI_NeedsProto(_imp___osver)                      \
      SymI_NeedsProto(localtime)                         \
      SymI_NeedsProto(gmtime)                            \
      SymI_NeedsProto(opendir)                           \
      SymI_NeedsProto(readdir)                           \
      SymI_NeedsProto(rewinddir)                         \
      RTS_MINGW_EXTRA_SYMS                               \
      RTS_MINGW_GETTIMEOFDAY_SYM		         \
      SymI_NeedsProto(closedir)
462
#endif
463

464
#if defined(darwin_HOST_OS) && HAVE_PRINTF_LDBLSTUB
465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509
#define RTS_DARWIN_ONLY_SYMBOLS			            \
     SymI_NeedsProto(asprintf$LDBLStub)                     \
     SymI_NeedsProto(err$LDBLStub)                          \
     SymI_NeedsProto(errc$LDBLStub)                         \
     SymI_NeedsProto(errx$LDBLStub)                         \
     SymI_NeedsProto(fprintf$LDBLStub)                      \
     SymI_NeedsProto(fscanf$LDBLStub)                       \
     SymI_NeedsProto(fwprintf$LDBLStub)                     \
     SymI_NeedsProto(fwscanf$LDBLStub)                      \
     SymI_NeedsProto(printf$LDBLStub)                       \
     SymI_NeedsProto(scanf$LDBLStub)                        \
     SymI_NeedsProto(snprintf$LDBLStub)                     \
     SymI_NeedsProto(sprintf$LDBLStub)                      \
     SymI_NeedsProto(sscanf$LDBLStub)                       \
     SymI_NeedsProto(strtold$LDBLStub)                      \
     SymI_NeedsProto(swprintf$LDBLStub)                     \
     SymI_NeedsProto(swscanf$LDBLStub)                      \
     SymI_NeedsProto(syslog$LDBLStub)                       \
     SymI_NeedsProto(vasprintf$LDBLStub)                    \
     SymI_NeedsProto(verr$LDBLStub)                         \
     SymI_NeedsProto(verrc$LDBLStub)                        \
     SymI_NeedsProto(verrx$LDBLStub)                        \
     SymI_NeedsProto(vfprintf$LDBLStub)                     \
     SymI_NeedsProto(vfscanf$LDBLStub)                      \
     SymI_NeedsProto(vfwprintf$LDBLStub)                    \
     SymI_NeedsProto(vfwscanf$LDBLStub)                     \
     SymI_NeedsProto(vprintf$LDBLStub)                      \
     SymI_NeedsProto(vscanf$LDBLStub)                       \
     SymI_NeedsProto(vsnprintf$LDBLStub)                    \
     SymI_NeedsProto(vsprintf$LDBLStub)                     \
     SymI_NeedsProto(vsscanf$LDBLStub)                      \
     SymI_NeedsProto(vswprintf$LDBLStub)                    \
     SymI_NeedsProto(vswscanf$LDBLStub)                     \
     SymI_NeedsProto(vsyslog$LDBLStub)                      \
     SymI_NeedsProto(vwarn$LDBLStub)                        \
     SymI_NeedsProto(vwarnc$LDBLStub)                       \
     SymI_NeedsProto(vwarnx$LDBLStub)                       \
     SymI_NeedsProto(vwprintf$LDBLStub)                     \
     SymI_NeedsProto(vwscanf$LDBLStub)                      \
     SymI_NeedsProto(warn$LDBLStub)                         \
     SymI_NeedsProto(warnc$LDBLStub)                        \
     SymI_NeedsProto(warnx$LDBLStub)                        \
     SymI_NeedsProto(wcstold$LDBLStub)                      \
     SymI_NeedsProto(wprintf$LDBLStub)                      \
     SymI_NeedsProto(wscanf$LDBLStub)
510 511 512 513
#else
#define RTS_DARWIN_ONLY_SYMBOLS
#endif

sof's avatar
sof committed
514
#ifndef SMP
515
# define MAIN_CAP_SYM SymI_HasProto(MainCapability)
sof's avatar
sof committed
516 517 518
#else
# define MAIN_CAP_SYM
#endif
519

sof's avatar
sof committed
520 521
#if !defined(mingw32_HOST_OS)
#define RTS_USER_SIGNALS_SYMBOLS \
522 523
   SymI_HasProto(setIOManagerControlFd) \
   SymI_HasProto(setIOManagerWakeupFd) \
524
   SymI_HasProto(ioManagerWakeup) \
525 526
   SymI_HasProto(blockUserSignals) \
   SymI_HasProto(unblockUserSignals)
sof's avatar
sof committed
527
#else
528
#define RTS_USER_SIGNALS_SYMBOLS     \
529
   SymI_HasProto(ioManagerWakeup) \
530 531 532 533
   SymI_HasProto(sendIOManagerEvent) \
   SymI_HasProto(readIOManagerEvent) \
   SymI_HasProto(getIOManagerEvent)  \
   SymI_HasProto(console_handler)
sof's avatar
sof committed
534 535
#endif

536 537 538 539 540 541 542 543 544 545 546 547 548 549 550
#define RTS_LIBFFI_SYMBOLS                                  \
     SymE_NeedsProto(ffi_prep_cif)                          \
     SymE_NeedsProto(ffi_call)                              \
     SymE_NeedsProto(ffi_type_void)                         \
     SymE_NeedsProto(ffi_type_float)                        \
     SymE_NeedsProto(ffi_type_double)                       \
     SymE_NeedsProto(ffi_type_sint64)                       \
     SymE_NeedsProto(ffi_type_uint64)                       \
     SymE_NeedsProto(ffi_type_sint32)                       \
     SymE_NeedsProto(ffi_type_uint32)                       \
     SymE_NeedsProto(ffi_type_sint16)                       \
     SymE_NeedsProto(ffi_type_uint16)                       \
     SymE_NeedsProto(ffi_type_sint8)                        \
     SymE_NeedsProto(ffi_type_uint8)                        \
     SymE_NeedsProto(ffi_type_pointer)
551

552 553 554
#ifdef TABLES_NEXT_TO_CODE
#define RTS_RET_SYMBOLS /* nothing */
#else
555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571
#define RTS_RET_SYMBOLS 		                \
      SymI_HasProto(stg_enter_ret)			\
      SymI_HasProto(stg_gc_fun_ret)			\
      SymI_HasProto(stg_ap_v_ret)			\
      SymI_HasProto(stg_ap_f_ret)			\
      SymI_HasProto(stg_ap_d_ret)			\
      SymI_HasProto(stg_ap_l_ret)			\
      SymI_HasProto(stg_ap_n_ret)			\
      SymI_HasProto(stg_ap_p_ret)			\
      SymI_HasProto(stg_ap_pv_ret)			\
      SymI_HasProto(stg_ap_pp_ret)			\
      SymI_HasProto(stg_ap_ppv_ret)			\
      SymI_HasProto(stg_ap_ppp_ret)			\
      SymI_HasProto(stg_ap_pppv_ret)			\
      SymI_HasProto(stg_ap_pppp_ret)			\
      SymI_HasProto(stg_ap_ppppp_ret)			\
      SymI_HasProto(stg_ap_pppppp_ret)
572 573
#endif

574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686
/* Modules compiled with -ticky may mention ticky counters */
/* This list should marry up with the one in $(TOP)/includes/stg/Ticky.h */
#define RTS_TICKY_SYMBOLS                       \
      SymI_NeedsProto(ticky_entry_ctrs)         \
      SymI_NeedsProto(top_ct)                   \
                                                \
      SymI_HasProto(ENT_VIA_NODE_ctr)		\
      SymI_HasProto(ENT_STATIC_THK_ctr)		\
      SymI_HasProto(ENT_DYN_THK_ctr)		\
      SymI_HasProto(ENT_STATIC_FUN_DIRECT_ctr)	\
      SymI_HasProto(ENT_DYN_FUN_DIRECT_ctr)	\
      SymI_HasProto(ENT_STATIC_CON_ctr)		\
      SymI_HasProto(ENT_DYN_CON_ctr)		\
      SymI_HasProto(ENT_STATIC_IND_ctr)		\
      SymI_HasProto(ENT_DYN_IND_ctr)		\
      SymI_HasProto(ENT_PERM_IND_ctr)		\
      SymI_HasProto(ENT_PAP_ctr)		\
      SymI_HasProto(ENT_AP_ctr)		        \
      SymI_HasProto(ENT_AP_STACK_ctr)		\
      SymI_HasProto(ENT_BH_ctr)	        	\
      SymI_HasProto(UNKNOWN_CALL_ctr)		\
      SymI_HasProto(SLOW_CALL_v_ctr)		\
      SymI_HasProto(SLOW_CALL_f_ctr)		\
      SymI_HasProto(SLOW_CALL_d_ctr)		\
      SymI_HasProto(SLOW_CALL_l_ctr)		\
      SymI_HasProto(SLOW_CALL_n_ctr)		\
      SymI_HasProto(SLOW_CALL_p_ctr)		\
      SymI_HasProto(SLOW_CALL_pv_ctr)		\
      SymI_HasProto(SLOW_CALL_pp_ctr)		\
      SymI_HasProto(SLOW_CALL_ppv_ctr)		\
      SymI_HasProto(SLOW_CALL_ppp_ctr)		\
      SymI_HasProto(SLOW_CALL_pppv_ctr)		\
      SymI_HasProto(SLOW_CALL_pppp_ctr)		\
      SymI_HasProto(SLOW_CALL_ppppp_ctr)		\
      SymI_HasProto(SLOW_CALL_pppppp_ctr)		\
      SymI_HasProto(SLOW_CALL_OTHER_ctr)		\
      SymI_HasProto(ticky_slow_call_unevald)            \
      SymI_HasProto(SLOW_CALL_ctr)		        \
      SymI_HasProto(MULTI_CHUNK_SLOW_CALL_ctr)		\
      SymI_HasProto(MULTI_CHUNK_SLOW_CALL_CHUNKS_ctr)	\
      SymI_HasProto(KNOWN_CALL_ctr)		        \
      SymI_HasProto(KNOWN_CALL_TOO_FEW_ARGS_ctr)	\
      SymI_HasProto(KNOWN_CALL_EXTRA_ARGS_ctr)		\
      SymI_HasProto(SLOW_CALL_FUN_TOO_FEW_ctr)		\
      SymI_HasProto(SLOW_CALL_FUN_CORRECT_ctr)		\
      SymI_HasProto(SLOW_CALL_FUN_TOO_MANY_ctr)		\
      SymI_HasProto(SLOW_CALL_PAP_TOO_FEW_ctr)		\
      SymI_HasProto(SLOW_CALL_PAP_CORRECT_ctr)		\
      SymI_HasProto(SLOW_CALL_PAP_TOO_MANY_ctr)		\
      SymI_HasProto(SLOW_CALL_UNEVALD_ctr)		\
      SymI_HasProto(UPDF_OMITTED_ctr)		\
      SymI_HasProto(UPDF_PUSHED_ctr)		\
      SymI_HasProto(CATCHF_PUSHED_ctr)		\
      SymI_HasProto(UPDF_RCC_PUSHED_ctr)	\
      SymI_HasProto(UPDF_RCC_OMITTED_ctr)	\
      SymI_HasProto(UPD_SQUEEZED_ctr)		\
      SymI_HasProto(UPD_CON_IN_NEW_ctr)		\
      SymI_HasProto(UPD_CON_IN_PLACE_ctr)	\
      SymI_HasProto(UPD_PAP_IN_NEW_ctr)		\
      SymI_HasProto(UPD_PAP_IN_PLACE_ctr)	\
      SymI_HasProto(ALLOC_HEAP_ctr)		\
      SymI_HasProto(ALLOC_HEAP_tot)             \
      SymI_HasProto(ALLOC_FUN_ctr)		\
      SymI_HasProto(ALLOC_FUN_adm)              \
      SymI_HasProto(ALLOC_FUN_gds)              \
      SymI_HasProto(ALLOC_FUN_slp)              \
      SymI_HasProto(UPD_NEW_IND_ctr)		\
      SymI_HasProto(UPD_NEW_PERM_IND_ctr)	\
      SymI_HasProto(UPD_OLD_IND_ctr)		\
      SymI_HasProto(UPD_OLD_PERM_IND_ctr)		\
      SymI_HasProto(UPD_BH_UPDATABLE_ctr)		\
      SymI_HasProto(UPD_BH_SINGLE_ENTRY_ctr)		\
      SymI_HasProto(UPD_CAF_BH_UPDATABLE_ctr)		\
      SymI_HasProto(UPD_CAF_BH_SINGLE_ENTRY_ctr)	\
      SymI_HasProto(GC_SEL_ABANDONED_ctr)		\
      SymI_HasProto(GC_SEL_MINOR_ctr)		\
      SymI_HasProto(GC_SEL_MAJOR_ctr)		\
      SymI_HasProto(GC_FAILED_PROMOTION_ctr)	\
      SymI_HasProto(ALLOC_UP_THK_ctr)		\
      SymI_HasProto(ALLOC_SE_THK_ctr)		\
      SymI_HasProto(ALLOC_THK_adm)		\
      SymI_HasProto(ALLOC_THK_gds)		\
      SymI_HasProto(ALLOC_THK_slp)		\
      SymI_HasProto(ALLOC_CON_ctr)		\
      SymI_HasProto(ALLOC_CON_adm)		\
      SymI_HasProto(ALLOC_CON_gds)		\
      SymI_HasProto(ALLOC_CON_slp)		\
      SymI_HasProto(ALLOC_TUP_ctr)		\
      SymI_HasProto(ALLOC_TUP_adm)		\
      SymI_HasProto(ALLOC_TUP_gds)		\
      SymI_HasProto(ALLOC_TUP_slp)		\
      SymI_HasProto(ALLOC_BH_ctr)		\
      SymI_HasProto(ALLOC_BH_adm)		\
      SymI_HasProto(ALLOC_BH_gds)		\
      SymI_HasProto(ALLOC_BH_slp)		\
      SymI_HasProto(ALLOC_PRIM_ctr)		\
      SymI_HasProto(ALLOC_PRIM_adm)		\
      SymI_HasProto(ALLOC_PRIM_gds)		\
      SymI_HasProto(ALLOC_PRIM_slp)		\
      SymI_HasProto(ALLOC_PAP_ctr)		\
      SymI_HasProto(ALLOC_PAP_adm)		\
      SymI_HasProto(ALLOC_PAP_gds)		\
      SymI_HasProto(ALLOC_PAP_slp)		\
      SymI_HasProto(ALLOC_TSO_ctr)		\
      SymI_HasProto(ALLOC_TSO_adm)		\
      SymI_HasProto(ALLOC_TSO_gds)		\
      SymI_HasProto(ALLOC_TSO_slp)		\
      SymI_HasProto(RET_NEW_ctr)		\
      SymI_HasProto(RET_OLD_ctr)		\
      SymI_HasProto(RET_UNBOXED_TUP_ctr)	\
      SymI_HasProto(RET_SEMI_loads_avoided)


687 688 689 690 691 692 693 694 695 696 697 698 699 700 701
// On most platforms, the garbage collector rewrites references
//	to small integer and char objects to a set of common, shared ones.
//
// We don't do this when compiling to Windows DLLs at the moment because
//	it doesn't support cross package data references well.
//
#if defined(__PIC__) && defined(mingw32_HOST_OS)
#define RTS_INTCHAR_SYMBOLS
#else
#define RTS_INTCHAR_SYMBOLS				\
      SymI_HasProto(stg_CHARLIKE_closure)		\
      SymI_HasProto(stg_INTLIKE_closure)		
#endif


702 703
#define RTS_SYMBOLS				        \
      Maybe_Stable_Names			        \
704
      RTS_TICKY_SYMBOLS                                 \
705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744
      SymI_HasProto(StgReturn)				\
      SymI_HasProto(stg_enter_info)			\
      SymI_HasProto(stg_gc_void_info)			\
      SymI_HasProto(__stg_gc_enter_1)			\
      SymI_HasProto(stg_gc_noregs)			\
      SymI_HasProto(stg_gc_unpt_r1_info)		\
      SymI_HasProto(stg_gc_unpt_r1)			\
      SymI_HasProto(stg_gc_unbx_r1_info)		\
      SymI_HasProto(stg_gc_unbx_r1)			\
      SymI_HasProto(stg_gc_f1_info)			\
      SymI_HasProto(stg_gc_f1)				\
      SymI_HasProto(stg_gc_d1_info)			\
      SymI_HasProto(stg_gc_d1)				\
      SymI_HasProto(stg_gc_l1_info)			\
      SymI_HasProto(stg_gc_l1)				\
      SymI_HasProto(__stg_gc_fun)			\
      SymI_HasProto(stg_gc_fun_info)			\
      SymI_HasProto(stg_gc_gen)				\
      SymI_HasProto(stg_gc_gen_info)			\
      SymI_HasProto(stg_gc_gen_hp)			\
      SymI_HasProto(stg_gc_ut)				\
      SymI_HasProto(stg_gen_yield)			\
      SymI_HasProto(stg_yield_noregs)			\
      SymI_HasProto(stg_yield_to_interpreter)		\
      SymI_HasProto(stg_gen_block)			\
      SymI_HasProto(stg_block_noregs)			\
      SymI_HasProto(stg_block_1)			\
      SymI_HasProto(stg_block_takemvar)			\
      SymI_HasProto(stg_block_putmvar)			\
      MAIN_CAP_SYM                                      \
      SymI_HasProto(MallocFailHook)			\
      SymI_HasProto(OnExitHook)				\
      SymI_HasProto(OutOfHeapHook)			\
      SymI_HasProto(StackOverflowHook)			\
      SymI_HasProto(addDLL)               		\
      SymI_HasProto(__int_encodeDouble)			\
      SymI_HasProto(__word_encodeDouble)		\
      SymI_HasProto(__2Int_encodeDouble)		\
      SymI_HasProto(__int_encodeFloat)			\
      SymI_HasProto(__word_encodeFloat)			\
745
      SymI_HasProto(stg_atomicallyzh)			\
746 747 748
      SymI_HasProto(barf)				\
      SymI_HasProto(debugBelch)				\
      SymI_HasProto(errorBelch)				\
Simon Marlow's avatar
Simon Marlow committed
749
      SymI_HasProto(sysErrorBelch)                      \
750 751 752
      SymI_HasProto(stg_getMaskingStatezh)		\
      SymI_HasProto(stg_maskAsyncExceptionszh)	        \
      SymI_HasProto(stg_maskUninterruptiblezh)	        \
753 754 755 756
      SymI_HasProto(stg_catchzh)			\
      SymI_HasProto(stg_catchRetryzh)			\
      SymI_HasProto(stg_catchSTMzh)			\
      SymI_HasProto(stg_checkzh)                        \
757 758 759
      SymI_HasProto(closure_flags)                      \
      SymI_HasProto(cmp_thread)				\
      SymI_HasProto(createAdjustor)			\
760 761
      SymI_HasProto(stg_decodeDoublezu2Intzh)		\
      SymI_HasProto(stg_decodeFloatzuIntzh)		\
762
      SymI_HasProto(defaultsHook)			\
763 764 765
      SymI_HasProto(stg_delayzh)			\
      SymI_HasProto(stg_deRefWeakzh)			\
      SymI_HasProto(stg_deRefStablePtrzh)		\
766
      SymI_HasProto(dirty_MUT_VAR)			\
767 768
      SymI_HasProto(stg_forkzh)			        \
      SymI_HasProto(stg_forkOnzh)			\
769 770 771 772
      SymI_HasProto(forkProcess)			\
      SymI_HasProto(forkOS_createThread)		\
      SymI_HasProto(freeHaskellFunctionPtr)		\
      SymI_HasProto(getOrSetTypeableStore)		\
773 774 775 776 777 778
      SymI_HasProto(getOrSetGHCConcSignalSignalHandlerStore)		\
      SymI_HasProto(getOrSetGHCConcWindowsPendingDelaysStore)		\
      SymI_HasProto(getOrSetGHCConcWindowsIOManagerThreadStore)	\
      SymI_HasProto(getOrSetGHCConcWindowsProddingStore)		\
      SymI_HasProto(getOrSetSystemEventThreadEventManagerStore)		\
      SymI_HasProto(getOrSetSystemEventThreadIOManagerThreadStore)		\
779 780 781 782 783 784 785 786 787 788 789 790 791
      SymI_HasProto(genSymZh)				\
      SymI_HasProto(genericRaise)			\
      SymI_HasProto(getProgArgv)			\
      SymI_HasProto(getFullProgArgv)			\
      SymI_HasProto(getStablePtr)			\
      SymI_HasProto(hs_init)				\
      SymI_HasProto(hs_exit)				\
      SymI_HasProto(hs_set_argv)			\
      SymI_HasProto(hs_add_root)			\
      SymI_HasProto(hs_perform_gc)			\
      SymI_HasProto(hs_free_stable_ptr)			\
      SymI_HasProto(hs_free_fun_ptr)			\
      SymI_HasProto(hs_hpc_rootModule)		        \
792
      SymI_HasProto(hs_hpc_module)		        \
793
      SymI_HasProto(initLinker)				\
794 795 796
      SymI_HasProto(stg_unpackClosurezh)                \
      SymI_HasProto(stg_getApStackValzh)                \
      SymI_HasProto(stg_getSparkzh)                     \
Simon Marlow's avatar
Simon Marlow committed
797
      SymI_HasProto(stg_numSparkszh)                    \
798 799 800
      SymI_HasProto(stg_isCurrentThreadBoundzh)	        \
      SymI_HasProto(stg_isEmptyMVarzh)			\
      SymI_HasProto(stg_killThreadzh)			\
801 802 803 804
      SymI_HasProto(loadObj)          			\
      SymI_HasProto(insertStableSymbol) 		\
      SymI_HasProto(insertSymbol)     			\
      SymI_HasProto(lookupSymbol)     			\
805 806 807 808 809 810 811
      SymI_HasProto(stg_makeStablePtrzh)		\
      SymI_HasProto(stg_mkApUpd0zh)			\
      SymI_HasProto(stg_myThreadIdzh)			\
      SymI_HasProto(stg_labelThreadzh)                  \
      SymI_HasProto(stg_newArrayzh)			\
      SymI_HasProto(stg_newBCOzh)			\
      SymI_HasProto(stg_newByteArrayzh)  		\
812
      SymI_HasProto_redirect(newCAF, newDynCAF)		\
813 814 815 816 817 818 819
      SymI_HasProto(stg_newMVarzh)			\
      SymI_HasProto(stg_newMutVarzh)			\
      SymI_HasProto(stg_newTVarzh)			\
      SymI_HasProto(stg_noDuplicatezh)			\
      SymI_HasProto(stg_atomicModifyMutVarzh)		\
      SymI_HasProto(stg_newPinnedByteArrayzh)		\
      SymI_HasProto(stg_newAlignedPinnedByteArrayzh)	\
820 821 822 823 824
      SymI_HasProto(newSpark)				\
      SymI_HasProto(performGC)				\
      SymI_HasProto(performMajorGC)			\
      SymI_HasProto(prog_argc)				\
      SymI_HasProto(prog_argv)				\
825 826 827 828 829
      SymI_HasProto(stg_putMVarzh)			\
      SymI_HasProto(stg_raisezh)			\
      SymI_HasProto(stg_raiseIOzh)			\
      SymI_HasProto(stg_readTVarzh)			\
      SymI_HasProto(stg_readTVarIOzh)			\
830 831
      SymI_HasProto(resumeThread)			\
      SymI_HasProto(resolveObjs)                        \
832
      SymI_HasProto(stg_retryzh)                        \
833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877
      SymI_HasProto(rts_apply)				\
      SymI_HasProto(rts_checkSchedStatus)		\
      SymI_HasProto(rts_eval)				\
      SymI_HasProto(rts_evalIO)				\
      SymI_HasProto(rts_evalLazyIO)			\
      SymI_HasProto(rts_evalStableIO)			\
      SymI_HasProto(rts_eval_)				\
      SymI_HasProto(rts_getBool)			\
      SymI_HasProto(rts_getChar)			\
      SymI_HasProto(rts_getDouble)			\
      SymI_HasProto(rts_getFloat)			\
      SymI_HasProto(rts_getInt)				\
      SymI_HasProto(rts_getInt8)			\
      SymI_HasProto(rts_getInt16)			\
      SymI_HasProto(rts_getInt32)			\
      SymI_HasProto(rts_getInt64)			\
      SymI_HasProto(rts_getPtr)				\
      SymI_HasProto(rts_getFunPtr)			\
      SymI_HasProto(rts_getStablePtr)			\
      SymI_HasProto(rts_getThreadId)			\
      SymI_HasProto(rts_getWord)			\
      SymI_HasProto(rts_getWord8)			\
      SymI_HasProto(rts_getWord16)			\
      SymI_HasProto(rts_getWord32)			\
      SymI_HasProto(rts_getWord64)			\
      SymI_HasProto(rts_lock)				\
      SymI_HasProto(rts_mkBool)				\
      SymI_HasProto(rts_mkChar)				\
      SymI_HasProto(rts_mkDouble)			\
      SymI_HasProto(rts_mkFloat)			\
      SymI_HasProto(rts_mkInt)				\
      SymI_HasProto(rts_mkInt8)				\
      SymI_HasProto(rts_mkInt16)			\
      SymI_HasProto(rts_mkInt32)			\
      SymI_HasProto(rts_mkInt64)			\
      SymI_HasProto(rts_mkPtr)				\
      SymI_HasProto(rts_mkFunPtr)			\
      SymI_HasProto(rts_mkStablePtr)			\
      SymI_HasProto(rts_mkString)			\
      SymI_HasProto(rts_mkWord)				\
      SymI_HasProto(rts_mkWord8)			\
      SymI_HasProto(rts_mkWord16)			\
      SymI_HasProto(rts_mkWord32)			\
      SymI_HasProto(rts_mkWord64)			\
      SymI_HasProto(rts_unlock)				\
878
      SymI_HasProto(rts_unsafeGetMyCapability)          \
879
      SymI_HasProto(rtsSupportsBoundThreads)		\
880
      SymI_HasProto(rts_isProfiled)			\
881 882 883 884 885 886 887
      SymI_HasProto(setProgArgv)			\
      SymI_HasProto(startupHaskell)			\
      SymI_HasProto(shutdownHaskell)			\
      SymI_HasProto(shutdownHaskellAndExit)		\
      SymI_HasProto(stable_ptr_table)			\
      SymI_HasProto(stackOverflow)			\
      SymI_HasProto(stg_CAF_BLACKHOLE_info)		\
888
      SymI_HasProto(stg_BLACKHOLE_info)			\
889
      SymI_HasProto(__stg_EAGER_BLACKHOLE_info)		\
890 891
      SymI_HasProto(stg_BLOCKING_QUEUE_CLEAN_info)      \
      SymI_HasProto(stg_BLOCKING_QUEUE_DIRTY_info)	\
892 893 894 895
      SymI_HasProto(startTimer)                         \
      SymI_HasProto(stg_MVAR_CLEAN_info)		\
      SymI_HasProto(stg_MVAR_DIRTY_info)		\
      SymI_HasProto(stg_IND_STATIC_info)		\
896
      SymI_HasProto(stg_ARR_WORDS_info)                 \
897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954
      SymI_HasProto(stg_MUT_ARR_PTRS_DIRTY_info)	\
      SymI_HasProto(stg_MUT_ARR_PTRS_FROZEN_info)	\
      SymI_HasProto(stg_MUT_ARR_PTRS_FROZEN0_info)	\
      SymI_HasProto(stg_WEAK_info)                      \
      SymI_HasProto(stg_ap_v_info)			\
      SymI_HasProto(stg_ap_f_info)			\
      SymI_HasProto(stg_ap_d_info)			\
      SymI_HasProto(stg_ap_l_info)			\
      SymI_HasProto(stg_ap_n_info)			\
      SymI_HasProto(stg_ap_p_info)			\
      SymI_HasProto(stg_ap_pv_info)			\
      SymI_HasProto(stg_ap_pp_info)			\
      SymI_HasProto(stg_ap_ppv_info)			\
      SymI_HasProto(stg_ap_ppp_info)			\
      SymI_HasProto(stg_ap_pppv_info)			\
      SymI_HasProto(stg_ap_pppp_info)			\
      SymI_HasProto(stg_ap_ppppp_info)			\
      SymI_HasProto(stg_ap_pppppp_info)			\
      SymI_HasProto(stg_ap_0_fast)			\
      SymI_HasProto(stg_ap_v_fast)			\
      SymI_HasProto(stg_ap_f_fast)			\
      SymI_HasProto(stg_ap_d_fast)			\
      SymI_HasProto(stg_ap_l_fast)			\
      SymI_HasProto(stg_ap_n_fast)			\
      SymI_HasProto(stg_ap_p_fast)			\
      SymI_HasProto(stg_ap_pv_fast)			\
      SymI_HasProto(stg_ap_pp_fast)			\
      SymI_HasProto(stg_ap_ppv_fast)			\
      SymI_HasProto(stg_ap_ppp_fast)			\
      SymI_HasProto(stg_ap_pppv_fast)			\
      SymI_HasProto(stg_ap_pppp_fast)			\
      SymI_HasProto(stg_ap_ppppp_fast)			\
      SymI_HasProto(stg_ap_pppppp_fast)			\
      SymI_HasProto(stg_ap_1_upd_info)			\
      SymI_HasProto(stg_ap_2_upd_info)			\
      SymI_HasProto(stg_ap_3_upd_info)			\
      SymI_HasProto(stg_ap_4_upd_info)			\
      SymI_HasProto(stg_ap_5_upd_info)			\
      SymI_HasProto(stg_ap_6_upd_info)			\
      SymI_HasProto(stg_ap_7_upd_info)			\
      SymI_HasProto(stg_exit)				\
      SymI_HasProto(stg_sel_0_upd_info)			\
      SymI_HasProto(stg_sel_10_upd_info)		\
      SymI_HasProto(stg_sel_11_upd_info)		\
      SymI_HasProto(stg_sel_12_upd_info)		\
      SymI_HasProto(stg_sel_13_upd_info)		\
      SymI_HasProto(stg_sel_14_upd_info)		\
      SymI_HasProto(stg_sel_15_upd_info)		\
      SymI_HasProto(stg_sel_1_upd_info)			\
      SymI_HasProto(stg_sel_2_upd_info)			\
      SymI_HasProto(stg_sel_3_upd_info)			\
      SymI_HasProto(stg_sel_4_upd_info)			\
      SymI_HasProto(stg_sel_5_upd_info)			\
      SymI_HasProto(stg_sel_6_upd_info)			\
      SymI_HasProto(stg_sel_7_upd_info)			\
      SymI_HasProto(stg_sel_8_upd_info)			\
      SymI_HasProto(stg_sel_9_upd_info)			\
      SymI_HasProto(stg_upd_frame_info)			\
955
      SymI_HasProto(stg_bh_upd_frame_info)		\
956
      SymI_HasProto(suspendThread)			\
957 958 959 960
      SymI_HasProto(stg_takeMVarzh)			\
      SymI_HasProto(stg_threadStatuszh)		        \
      SymI_HasProto(stg_tryPutMVarzh)			\
      SymI_HasProto(stg_tryTakeMVarzh)			\
961
      SymI_HasProto(stg_unmaskAsyncExceptionszh)	\
962
      SymI_HasProto(unloadObj)                          \
963 964 965 966 967
      SymI_HasProto(stg_unsafeThawArrayzh)		\
      SymI_HasProto(stg_waitReadzh)			\
      SymI_HasProto(stg_waitWritezh)			\
      SymI_HasProto(stg_writeTVarzh)			\
      SymI_HasProto(stg_yieldzh)                        \
968
      SymI_NeedsProto(stg_interp_constr_entry)          \
969
      SymI_HasProto(stg_arg_bitmaps)                    \
970
      SymI_HasProto(alloc_blocks_lim)                   \
Simon Marlow's avatar
Simon Marlow committed
971
      SymI_HasProto(g0)                                 \
972
      SymI_HasProto(allocate)                           \
973 974 975 976 977 978 979 980 981 982
      SymI_HasProto(allocateExec)	                \
      SymI_HasProto(freeExec)		                \
      SymI_HasProto(getAllocations)                     \
      SymI_HasProto(revertCAFs)                         \
      SymI_HasProto(RtsFlags)                           \
      SymI_NeedsProto(rts_breakpoint_io_action)		\
      SymI_NeedsProto(rts_stop_next_breakpoint)		\
      SymI_NeedsProto(rts_stop_on_exception)		\
      SymI_HasProto(stopTimer)				\
      SymI_HasProto(n_capabilities)			\
983
      SymI_HasProto(stg_traceCcszh)                     \
984
      SymI_HasProto(stg_traceEventzh)                   \
985 986
      RTS_USER_SIGNALS_SYMBOLS				\
      RTS_INTCHAR_SYMBOLS
987

988

989 990
// 64-bit support functions in libgcc.a
#if defined(__GNUC__) && SIZEOF_VOID_P <= 4
991 992 993 994 995 996 997 998
#define RTS_LIBGCC_SYMBOLS			       \
      SymI_NeedsProto(__divdi3)                        \
      SymI_NeedsProto(__udivdi3)                       \
      SymI_NeedsProto(__moddi3)                        \
      SymI_NeedsProto(__umoddi3)		       \
      SymI_NeedsProto(__muldi3)			       \
      SymI_NeedsProto(__ashldi3)		       \
      SymI_NeedsProto(__ashrdi3)		       \
999
      SymI_NeedsProto(__lshrdi3)
1000 1001 1002 1003
#else
#define RTS_LIBGCC_SYMBOLS
#endif

1004
#if defined(darwin_HOST_OS) && defined(powerpc_HOST_ARCH)
1005 1006 1007 1008
      // Symbols that don't have a leading underscore
      // on Mac OS X. They have to receive special treatment,
      // see machoInitSymbolsWithoutUnderscore()
#define RTS_MACHO_NOUNDERLINE_SYMBOLS		\
1009 1010
      SymI_NeedsProto(saveFP)				\
      SymI_NeedsProto(restFP)
1011
#endif
1012 1013

/* entirely bogus claims about types of these symbols */
1014
#define SymI_NeedsProto(vvv)  extern void vvv(void);
1015
#if defined(__PIC__) && defined(mingw32_HOST_OS)
1016 1017
#define SymE_HasProto(vvv)    SymE_HasProto(vvv);
#define SymE_NeedsProto(vvv)    extern void _imp__ ## vvv (void);
1018
#else
1019 1020
#define SymE_NeedsProto(vvv)  SymI_NeedsProto(vvv);
#define SymE_HasProto(vvv)    SymI_HasProto(vvv)
1021
#endif
1022 1023
#define SymI_HasProto(vvv) /**/
#define SymI_HasProto_redirect(vvv,xxx) /**/
1024
RTS_SYMBOLS
1025
RTS_RET_SYMBOLS
1026
RTS_POSIX_ONLY_SYMBOLS
1027
RTS_MINGW_ONLY_SYMBOLS
sof's avatar
sof committed
1028
RTS_CYGWIN_ONLY_SYMBOLS
1029
RTS_DARWIN_ONLY_SYMBOLS
1030
RTS_LIBGCC_SYMBOLS
1031
RTS_LIBFFI_SYMBOLS
1032 1033 1034 1035 1036
#undef SymI_NeedsProto
#undef SymI_HasProto
#undef SymI_HasProto_redirect
#undef SymE_HasProto
#undef SymE_NeedsProto
1037 1038 1039 1040 1041 1042 1043

#ifdef LEADING_UNDERSCORE
#define MAYBE_LEADING_UNDERSCORE_STR(s) ("_" s)
#else
#define MAYBE_LEADING_UNDERSCORE_STR(s) (s)
#endif

1044
#define SymI_HasProto(vvv) { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
1045
                    (void*)(&(vvv)) },
1046
#define SymE_HasProto(vvv) { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
1047
	    (void*)DLL_IMPORT_DATA_REF(vvv) },
1048

1049 1050 1051 1052
#define SymI_NeedsProto(vvv) SymI_HasProto(vvv)
#define SymE_NeedsProto(vvv) SymE_HasProto(vvv)

// SymI_HasProto_redirect allows us to redirect references to one symbol to
1053
// another symbol.  See newCAF/newDynCAF for an example.
1054
#define SymI_HasProto_redirect(vvv,xxx) \
1055 1056 1057
    { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
      (void*)(&(xxx)) },

1058
static RtsSymbolVal rtsSyms[] = {
1059
      RTS_SYMBOLS
1060
      RTS_RET_SYMBOLS
1061
      RTS_POSIX_ONLY_SYMBOLS
1062
      RTS_MINGW_ONLY_SYMBOLS
sof's avatar
sof committed
1063
      RTS_CYGWIN_ONLY_SYMBOLS
1064
      RTS_DARWIN_ONLY_SYMBOLS
1065
      RTS_LIBGCC_SYMBOLS
1066
      RTS_LIBFFI_SYMBOLS
1067 1068 1069 1070
#if defined(darwin_HOST_OS) && defined(i386_HOST_ARCH)
      // dyld stub code contains references to this,
      // but it should never be called because we treat
      // lazy pointers as nonlazy.
1071
      { "dyld_stub_binding_helper", (void*)0xDEADBEEF },
1072
#endif
1073 1074 1075
      { 0, 0 } /* sentinel */
};

1076 1077


1078 1079 1080
/* -----------------------------------------------------------------------------
 * Insert symbols into hash tables, checking for duplicates.
 */
1081

1082 1083
static void ghciInsertStrHashTable ( char* obj_name,
                                     HashTable *table,
1084
                                     char* key,
1085 1086 1087
                                     void *data
				   )
{
Simon Marlow's avatar
Simon Marlow committed
1088 1089
   if (lookupHashTable(table, (StgWord)key) == NULL)
   {
1090 1091
      insertStrHashTable(table, (StgWord)key, data);
      return;
Simon Marlow's avatar
Simon Marlow committed
1092 1093
   }
   debugBelch(
1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107
      "\n\n"
      "GHCi runtime linker: fatal error: I found a duplicate definition for symbol\n"
      "   %s\n"
      "whilst processing object file\n"
      "   %s\n"
      "This could be caused by:\n"
      "   * Loading two different object files which export the same symbol\n"
      "   * Specifying the same object file twice on the GHCi command line\n"
      "   * An incorrect `package.conf' entry, causing some object to be\n"
      "     loaded twice.\n"
      "GHCi cannot safely continue in this situation.  Exiting now.  Sorry.\n"
      "\n",
      (char*)key,
      obj_name
Simon Marlow's avatar
Simon Marlow committed
1108 1109
   );
   exit(1);
1110
}
1111 1112 1113
/* -----------------------------------------------------------------------------
 * initialize the object linker
 */
1114 1115 1116 1117


static int linker_init_done = 0 ;

1118
#if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1119
static void *dl_prog_handle;
1120 1121 1122 1123 1124
static regex_t re_invalid;
static regex_t re_realso;
#ifdef THREADED_RTS
static Mutex dl_mutex; // mutex to protect dlopen/dlerror critical section
#endif
1125
#endif
1126 1127 1128 1129

void
initLinker( void )
{
1130
    RtsSymbolVal *sym;
Simon Marlow's avatar
Simon Marlow committed
1131
#if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1132
    int compileResult;
Simon Marlow's avatar
Simon Marlow committed
1133
#endif
1134

1135 1136 1137 1138 1139 1140 1141
    /* Make initLinker idempotent, so we can call it
       before evey relevant operation; that means we
       don't need to initialise the linker separately */
    if (linker_init_done == 1) { return; } else {
      linker_init_done = 1;
    }

Simon Marlow's avatar
Simon Marlow committed
1142
#if defined(THREADED_RTS) && (defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO))
1143 1144
    initMutex(&dl_mutex);
#endif
1145
    stablehash = allocStrHashTable();
1146 1147 1148 1149
    symhash = allocStrHashTable();

    /* populate the symbol table with stuff from the RTS */
    for (sym = rtsSyms; sym->lbl != NULL; sym++) {
1150 1151
	ghciInsertStrHashTable("(GHCi built-in symbols)",
                               symhash, sym->lbl, sym->addr);
1152
    }
1153
#   if defined(OBJFORMAT_MACHO) && defined(powerpc_HOST_ARCH)
1154 1155 1156
    machoInitSymbolsWithoutUnderscore();
#   endif

1157
#   if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1158
#   if defined(RTLD_DEFAULT)
1159 1160
    dl_prog_handle = RTLD_DEFAULT;
#   else
1161
    dl_prog_handle = dlopen(NULL, RTLD_LAZY);
1162
#   endif /* RTLD_DEFAULT */
1163 1164 1165 1166 1167 1168 1169 1170 1171

    compileResult = regcomp(&re_invalid,
           "(([^ \t()])+\\.so([^ \t:()])*):([ \t])*invalid ELF header",
           REG_EXTENDED);
    ASSERT( compileResult == 0 );
    compileResult = regcomp(&re_realso,
           "GROUP *\\( *(([^ )])+)",
           REG_EXTENDED);
    ASSERT( compileResult == 0 );
1172
#   endif
1173

1174
#if !defined(ALWAYS_PIC) && defined(x86_64_HOST_ARCH)
1175 1176 1177 1178 1179
    if (RtsFlags.MiscFlags.linkerMemBase != 0) {
        // User-override for mmap_32bit_base
        mmap_32bit_base = (void*)RtsFlags.MiscFlags.linkerMemBase;
    }
#endif
1180 1181 1182 1183 1184 1185 1186 1187 1188 1189

#if defined(mingw32_HOST_OS)
    /*
     * These two libraries cause problems when added to the static link,
     * but are necessary for resolving symbols in GHCi, hence we load
     * them manually here.
     */
    addDLL("msvcrt");
    addDLL("kernel32");
#endif
1190 1191
}

1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204
void
exitLinker( void ) {
#if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
   if (linker_init_done == 1) {
      regfree(&re_invalid);
      regfree(&re_realso);
#ifdef THREADED_RTS
      closeMutex(&dl_mutex);
#endif
   }
#endif
}

1205
/* -----------------------------------------------------------------------------
1206 1207 1208
 *                  Loading DLL or .so dynamic libraries
 * -----------------------------------------------------------------------------
 *
1209 1210 1211 1212
 * Add a DLL from which symbols may be found.  In the ELF case, just
 * do RTLD_GLOBAL-style add, so no further messing around needs to
 * happen in order that symbols in the loaded .so are findable --
 * lookupSymbol() will subsequently see them by dlsym on the program's
1213 1214
 * dl-handle.  Returns NULL if success, otherwise ptr to an err msg.
 *
1215
 * In the PEi386 case, open the DLLs and put handles to them in a
1216
 * linked list.  When looking for a symbol, try all handles in the
1217 1218 1219 1220 1221
 * list.  This means that we need to load even DLLs that are guaranteed
 * to be in the ghc.exe image already, just so we can get a handle
 * to give to loadSymbol, so that we can find the symbols.  For such
 * libraries, the LoadLibrary call should be a no-op except for returning
 * the handle.
1222
 *
1223
 */
1224 1225 1226 1227 1228 1229

#if defined(OBJFORMAT_PEi386)
/* A record for storing handles into DLLs. */

typedef
   struct _OpenedDLL {
1230
      char*              name;
1231 1232
      struct _OpenedDLL* next;
      HINSTANCE instance;
1233
   }
1234 1235 1236 1237 1238 1239
   OpenedDLL;

/* A list thereof. */
static OpenedDLL* opened_dlls = NULL;
#endif

1240
#  if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
1241

1242
static const char *
1243 1244 1245
internal_dlopen(const char *dll_name)
{
   void *hdl;
1246 1247
   const char *errmsg;
   char *errmsg_copy;
1248

1249 1250
   // omitted: RTLD_NOW
   // see http://www.haskell.org/pipermail/cvs-ghc/2007-September/038570.html
1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261
   IF_DEBUG(linker,
      debugBelch("internal_dlopen: dll_name = '%s'\n", dll_name));

   //-------------- Begin critical section ------------------
   // This critical section is necessary because dlerror() is not
   // required to be reentrant (see POSIX -- IEEE Std 1003.1-2008)
   // Also, the error message returned must be copied to preserve it
   // (see POSIX also)

   ACQUIRE_LOCK(&dl_mutex);
   hdl = dlopen(dll_name, RTLD_LAZY | RTLD_GLOBAL);
dons's avatar
dons committed
1262

1263
   errmsg = NULL;
1264 1265 1266 1267
   if (hdl == NULL) {
      /* dlopen failed; return a ptr to the error msg. */
      errmsg = dlerror();
      if (errmsg == NULL) errmsg = "addDLL: unknown error";
1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286
      errmsg_copy = stgMallocBytes(strlen(errmsg)+1, "addDLL");
      strcpy(errmsg_copy, errmsg);
      errmsg = errmsg_copy;
   }
   RELEASE_LOCK(&dl_mutex);
   //--------------- End critical section -------------------

   return errmsg;
}
#  endif

const char *
addDLL( char *dll_name )
{
#  if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
   /* ------------------- ELF DLL loader ------------------- */

#define NMATCH 5
   regmatch_t match[NMATCH];
1287
   const char *errmsg;
1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299
   FILE* fp;
   size_t match_length;
#define MAXLINE 1000
   char line[MAXLINE];
   int result;

   initLinker();

   IF_DEBUG(linker, debugBelch("addDLL: dll_name = '%s'\n", dll_name));
   errmsg = internal_dlopen(dll_name);

   if (errmsg == NULL) {
1300 1301
      return NULL;
   }
1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346

   // GHC Trac ticket #2615
   // On some systems (e.g., Gentoo Linux) dynamic files (e.g. libc.so)
   // contain linker scripts rather than ELF-format object code. This
   // code handles the situation by recognizing the real object code
   // file name given in the linker script.
   //
   // If an "invalid ELF header" error occurs, it is assumed that the
   // .so file contains a linker script instead of ELF object code.
   // In this case, the code looks for the GROUP ( ... ) linker
   // directive. If one is found, the first file name inside the
   // parentheses is treated as the name of a dynamic library and the
   // code attempts to dlopen that file. If this is also unsuccessful,
   // an error message is returned.

   // see if the error message is due to an invalid ELF header
   IF_DEBUG(linker, debugBelch("errmsg = '%s'\n", errmsg));
   result = regexec(&re_invalid, errmsg, (size_t) NMATCH, match, 0);
   IF_DEBUG(linker, debugBelch("result = %i\n", result));
   if (result == 0) {
      // success -- try to read the named file as a linker script
      match_length = (size_t) stg_min((match[1].rm_eo - match[1].rm_so),
		                 MAXLINE-1);
      strncpy(line, (errmsg+(match[1].rm_so)),match_length);
      line[match_length] = '\0'; // make sure string is null-terminated
      IF_DEBUG(linker, debugBelch ("file name = '%s'\n", line));
      if ((fp = fopen(line, "r")) == NULL) {
	 return errmsg;	// return original error if open fails
      }
      // try to find a GROUP ( ... ) command
      while (fgets(line, MAXLINE, fp) != NULL) {
	 IF_DEBUG(linker, debugBelch("input line = %s", line));
	 if (regexec(&re_realso, line, (size_t) NMATCH, match, 0) == 0) {
            // success -- try to dlopen the first named file
            IF_DEBUG(linker, debugBelch("match%s\n",""));
	    line[match[1].rm_eo] = '\0';
	    errmsg = internal_dlopen(line+match[1].rm_so);
	    break;
	 }
	 // if control reaches here, no GROUP ( ... ) directive was found
	 // and the original error message is returned to the caller
      }
      fclose(fp);
   }
   return errmsg;
1347

1348
#  elif defined(OBJFORMAT_PEi386)
1349
   /* ------------------- Win32 DLL loader ------------------- */
1350

1351
   char*      buf;
1352
   OpenedDLL* o_dll;
1353
   HINSTANCE  instance;
1354

1355 1356
   initLinker();

1357
   /* debugBelch("\naddDLL; dll_name = `%s'\n", dll_name); */
1358 1359 1360 1361 1362

   /* See if we've already got it, and ignore if so. */
   for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next) {
      if (0 == strcmp(o_dll->name, dll_name))
         return NULL;
1363 1364
   }