/* -----------------------------------------------------------------------------
- * $Id: Linker.c,v 1.105 2002/10/12 23:12:08 wolfgang Exp $
+ * $Id: Linker.c,v 1.120 2003/05/30 09:06:24 simonmar Exp $
*
- * (c) The GHC Team, 2000, 2001
+ * (c) The GHC Team, 2000-2003
*
* RTS Object Linker
*
#include <sys/mman.h>
#endif
-#if defined(linux_TARGET_OS) || defined(solaris2_TARGET_OS) || defined(freebsd_TARGET_OS)
+#if defined(linux_TARGET_OS) || defined(solaris2_TARGET_OS) || defined(freebsd_TARGET_OS) || defined(netbsd_TARGET_OS)
# define OBJFORMAT_ELF
#elif defined(cygwin32_TARGET_OS) || defined (mingw32_TARGET_OS)
# define OBJFORMAT_PEi386
/* Hash table mapping symbol names to Symbol */
static /*Str*/HashTable *symhash;
+/* List of currently loaded objects */
+ObjectCode *objects = NULL; /* initially empty */
+
#if defined(OBJFORMAT_ELF)
static int ocVerifyImage_ELF ( ObjectCode* oc );
static int ocGetNames_ELF ( ObjectCode* oc );
static int ocVerifyImage_MachO ( ObjectCode* oc );
static int ocGetNames_MachO ( ObjectCode* oc );
static int ocResolve_MachO ( ObjectCode* oc );
+
+static void machoInitSymbolsWithoutUnderscore( void );
#endif
/* -----------------------------------------------------------------------------
SymX(uname) \
SymX(unlink) \
SymX(utime) \
- SymX(waitpid) \
- Sym(__divdi3) \
- Sym(__udivdi3) \
- Sym(__moddi3) \
- Sym(__umoddi3)
+ SymX(waitpid)
#elif !defined(mingw32_TARGET_OS)
#define RTS_MINGW_ONLY_SYMBOLS /**/
#define RTS_POSIX_ONLY_SYMBOLS /**/
#define RTS_CYGWIN_ONLY_SYMBOLS /**/
+/* Extra syms gen'ed by mingw-2's gcc-3.2: */
+#if __GNUC__>=3
+#define RTS_MINGW_EXTRA_SYMS \
+ Sym(_imp____mb_cur_max) \
+ Sym(_imp___pctype)
+#else
+#define RTS_MINGW_EXTRA_SYMS
+#endif
+
/* These are statically linked from the mingw libraries into the ghc
executable, so we have to employ this hack. */
#define RTS_MINGW_ONLY_SYMBOLS \
+ SymX(asyncReadzh_fast) \
+ SymX(asyncWritezh_fast) \
SymX(memset) \
SymX(inet_ntoa) \
SymX(inet_addr) \
Sym(opendir) \
Sym(readdir) \
Sym(rewinddir) \
- Sym(closedir) \
- Sym(__divdi3) \
- Sym(__udivdi3) \
- Sym(__moddi3) \
- Sym(__umoddi3)
+ RTS_MINGW_EXTRA_SYMS \
+ Sym(closedir)
#endif
#ifndef SMP
Maybe_ForeignObj \
Maybe_Stable_Names \
Sym(StgReturn) \
- Sym(init_stack) \
- SymX(__stg_chk_0) \
- SymX(__stg_chk_1) \
- SymX(stg_chk_2) \
- SymX(stg_chk_3) \
- SymX(stg_chk_4) \
- SymX(stg_chk_5) \
- SymX(stg_chk_6) \
- SymX(stg_chk_7) \
- SymX(stg_chk_8) \
- Sym(stg_enterStackTop) \
- SymX(stg_gc_d1) \
- SymX(stg_gc_l1) \
+ SymX(stg_enter_info) \
+ SymX(stg_enter_ret) \
+ SymX(stg_gc_void_info) \
SymX(__stg_gc_enter_1) \
- SymX(stg_gc_enter_2) \
- SymX(stg_gc_enter_3) \
- SymX(stg_gc_enter_4) \
- SymX(stg_gc_enter_5) \
- SymX(stg_gc_enter_6) \
- SymX(stg_gc_enter_7) \
- SymX(stg_gc_enter_8) \
- SymX(stg_gc_f1) \
SymX(stg_gc_noregs) \
- SymX(stg_gc_seq_1) \
- SymX(stg_gc_unbx_r1) \
+ SymX(stg_gc_unpt_r1_info) \
SymX(stg_gc_unpt_r1) \
- SymX(stg_gc_ut_0_1) \
- SymX(stg_gc_ut_1_0) \
- SymX(stg_gen_chk) \
+ SymX(stg_gc_unbx_r1_info) \
+ SymX(stg_gc_unbx_r1) \
+ SymX(stg_gc_f1_info) \
+ SymX(stg_gc_f1) \
+ SymX(stg_gc_d1_info) \
+ SymX(stg_gc_d1) \
+ SymX(stg_gc_l1_info) \
+ SymX(stg_gc_l1) \
+ SymX(__stg_gc_fun) \
+ SymX(stg_gc_fun_info) \
+ SymX(stg_gc_fun_ret) \
+ SymX(stg_gc_gen) \
+ SymX(stg_gc_gen_info) \
+ SymX(stg_gc_gen_hp) \
+ SymX(stg_gc_ut) \
+ SymX(stg_gen_yield) \
+ SymX(stg_yield_noregs) \
SymX(stg_yield_to_interpreter) \
+ SymX(stg_gen_block) \
+ SymX(stg_block_noregs) \
+ SymX(stg_block_1) \
+ SymX(stg_block_takemvar) \
+ SymX(stg_block_putmvar) \
+ SymX(stg_seq_frame_info) \
SymX(ErrorHdrHook) \
MAIN_CAP_SYM \
SymX(MallocFailHook) \
- SymX(NoRunnableThreadsHook) \
SymX(OnExitHook) \
SymX(OutOfHeapHook) \
SymX(PatErrorHdrHook) \
SymX(newArrayzh_fast) \
SymX(newBCOzh_fast) \
SymX(newByteArrayzh_fast) \
- SymX(newCAF) \
+ SymX_redirect(newCAF, newDynCAF) \
SymX(newMVarzh_fast) \
SymX(newMutVarzh_fast) \
+ SymX(atomicModifyMutVarzh_fast) \
SymX(newPinnedByteArrayzh_fast) \
SymX(orIntegerzh_fast) \
SymX(performGC) \
SymX(rts_getInt) \
SymX(rts_getInt32) \
SymX(rts_getPtr) \
+ SymX(rts_getFunPtr) \
SymX(rts_getStablePtr) \
SymX(rts_getThreadId) \
SymX(rts_getWord) \
SymX(rts_getWord32) \
+ SymX(rts_lock) \
SymX(rts_mkBool) \
SymX(rts_mkChar) \
SymX(rts_mkDouble) \
SymX(rts_mkInt64) \
SymX(rts_mkInt8) \
SymX(rts_mkPtr) \
+ SymX(rts_mkFunPtr) \
SymX(rts_mkStablePtr) \
SymX(rts_mkString) \
SymX(rts_mkWord) \
SymX(rts_mkWord32) \
SymX(rts_mkWord64) \
SymX(rts_mkWord8) \
+ SymX(rts_unlock) \
SymX(run_queue_hd) \
SymX(setProgArgv) \
+ SymX(startupHaskell) \
+ SymX(shutdownHaskell) \
SymX(shutdownHaskellAndExit) \
SymX(stable_ptr_table) \
SymX(stackOverflow) \
SymX(stg_INTLIKE_closure) \
SymX(stg_MUT_ARR_PTRS_FROZEN_info) \
SymX(stg_WEAK_info) \
+ SymX(stg_ap_v_info) \
+ SymX(stg_ap_f_info) \
+ SymX(stg_ap_d_info) \
+ SymX(stg_ap_l_info) \
+ SymX(stg_ap_n_info) \
+ SymX(stg_ap_p_info) \
+ SymX(stg_ap_pv_info) \
+ SymX(stg_ap_pp_info) \
+ SymX(stg_ap_ppv_info) \
+ SymX(stg_ap_ppp_info) \
+ SymX(stg_ap_pppp_info) \
+ SymX(stg_ap_ppppp_info) \
+ SymX(stg_ap_pppppp_info) \
+ SymX(stg_ap_ppppppp_info) \
+ SymX(stg_ap_0_ret) \
+ SymX(stg_ap_v_ret) \
+ SymX(stg_ap_f_ret) \
+ SymX(stg_ap_d_ret) \
+ SymX(stg_ap_l_ret) \
+ SymX(stg_ap_n_ret) \
+ SymX(stg_ap_p_ret) \
+ SymX(stg_ap_pv_ret) \
+ SymX(stg_ap_pp_ret) \
+ SymX(stg_ap_ppv_ret) \
+ SymX(stg_ap_ppp_ret) \
+ SymX(stg_ap_pppp_ret) \
+ SymX(stg_ap_ppppp_ret) \
+ SymX(stg_ap_pppppp_ret) \
+ SymX(stg_ap_ppppppp_ret) \
SymX(stg_ap_1_upd_info) \
SymX(stg_ap_2_upd_info) \
SymX(stg_ap_3_upd_info) \
SymX(stg_sel_7_upd_info) \
SymX(stg_sel_8_upd_info) \
SymX(stg_sel_9_upd_info) \
- SymX(stg_seq_frame_info) \
SymX(stg_upd_frame_info) \
- SymX(__stg_update_PAP) \
SymX(suspendThread) \
SymX(takeMVarzh_fast) \
SymX(timesIntegerzh_fast) \
#define RTS_LONG_LONG_SYMS /* nothing */
#endif
-#ifdef ia64_TARGET_ARCH
-/* force these symbols to be present */
-#define RTS_EXTRA_SYMBOLS \
- Sym(__divsf3)
-#elif defined(powerpc_TARGET_ARCH)
-#define RTS_EXTRA_SYMBOLS \
+// 64-bit support functions in libgcc.a
+#if defined(__GNUC__) && SIZEOF_VOID_P <= 4
+#define RTS_LIBGCC_SYMBOLS \
Sym(__divdi3) \
Sym(__udivdi3) \
Sym(__moddi3) \
Sym(__lshrdi3) \
Sym(__eprintf)
#else
+#define RTS_LIBGCC_SYMBOLS
+#endif
+
+#ifdef ia64_TARGET_ARCH
+/* force these symbols to be present */
+#define RTS_EXTRA_SYMBOLS \
+ Sym(__divsf3)
+#else
#define RTS_EXTRA_SYMBOLS /* nothing */
#endif
+#ifdef darwin_TARGET_OS
+ // 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 \
+ Sym(saveFP) \
+ Sym(restFP)
+#endif
+
/* entirely bogus claims about types of these symbols */
#define Sym(vvv) extern void (vvv);
#define SymX(vvv) /**/
+#define SymX_redirect(vvv,xxx) /**/
RTS_SYMBOLS
RTS_LONG_LONG_SYMS
RTS_EXTRA_SYMBOLS
RTS_POSIX_ONLY_SYMBOLS
RTS_MINGW_ONLY_SYMBOLS
RTS_CYGWIN_ONLY_SYMBOLS
+RTS_LIBGCC_SYMBOLS
#undef Sym
#undef SymX
+#undef SymX_redirect
#ifdef LEADING_UNDERSCORE
#define MAYBE_LEADING_UNDERSCORE_STR(s) ("_" s)
(void*)(&(vvv)) },
#define SymX(vvv) Sym(vvv)
+// SymX_redirect allows us to redirect references to one symbol to
+// another symbol. See newCAF/newDynCAF for an example.
+#define SymX_redirect(vvv,xxx) \
+ { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
+ (void*)(&(xxx)) },
+
static RtsSymbolVal rtsSyms[] = {
RTS_SYMBOLS
RTS_LONG_LONG_SYMS
RTS_POSIX_ONLY_SYMBOLS
RTS_MINGW_ONLY_SYMBOLS
RTS_CYGWIN_ONLY_SYMBOLS
+ RTS_LIBGCC_SYMBOLS
{ 0, 0 } /* sentinel */
};
ghciInsertStrHashTable("(GHCi built-in symbols)",
symhash, sym->lbl, sym->addr);
}
+# if defined(OBJFORMAT_MACHO)
+ machoInitSymbolsWithoutUnderscore();
+# endif
+
# if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
dl_prog_handle = dlopen(NULL, RTLD_LAZY);
# endif
sprintf(buf, "%s.DRV", dll_name); // KAA: allow loading of drivers (like winspool.drv)
instance = LoadLibrary(buf);
if (instance == NULL) {
- free(buf);
+ stgFree(buf);
/* LoadLibrary failed; return a ptr to the error msg. */
return "addDLL: unknown error";
}
}
- free(buf);
+ stgFree(buf);
/* Add this DLL to the list of DLLs in which to search for symbols. */
o_dll = stgMallocBytes( sizeof(OpenedDLL), "addDLL" );
for (i = 0; i < oc->n_symbols; i++) {
sym = oc->symbols[i];
if (sym == NULL) continue;
- /* fprintf(stderr, "enquire %p %p\n", sym, oc->lochash); */
+ // fprintf(stderr, "enquire %p %p\n", sym, oc->lochash);
a = NULL;
- if (oc->lochash != NULL)
+ if (oc->lochash != NULL) {
a = lookupStrHashTable(oc->lochash, sym);
- if (a == NULL)
+ }
+ if (a == NULL) {
a = lookupStrHashTable(symhash, sym);
+ }
if (a == NULL) {
- /* fprintf(stderr, "ghci_enquire: can't find %s\n", sym); */
+ // fprintf(stderr, "ghci_enquire: can't find %s\n", sym);
}
else if (addr-DELTA <= a && a <= addr+DELTA) {
fprintf(stderr, "%p + %3d == `%s'\n", addr, a - addr, sym);
# elif defined(OBJFORMAT_MACHO)
oc->formatName = "Mach-O";
# else
- free(oc);
+ stgFree(oc);
barf("loadObj: not implemented on this platform");
# endif
/* We're going to leave this in place, in case there are
any pointers from the heap into it: */
- /* free(oc->image); */
- free(oc->fileName);
- free(oc->symbols);
- free(oc->sections);
+ /* stgFree(oc->image); */
+ stgFree(oc->fileName);
+ stgFree(oc->symbols);
+ stgFree(oc->sections);
/* The local hash table should have been freed at the end
of the ocResolve_ call on it. */
ASSERT(oc->lochash == NULL);
- free(oc);
+ stgFree(oc);
return 1;
}
}
return 1;
}
-static void resolveImports(
+static int resolveImports(
ObjectCode* oc,
char *image,
struct symtab_command *symLC,
addr = lookupSymbol(nm);
if(!addr)
{
- fprintf(stderr, "not found: %s\n", nm);
- abort();
+ belch("\n%s: unknown symbol `%s'", oc->fileName, nm);
+ return 0;
}
ASSERT(addr);
((void**)(image + sect->offset))[i] = addr;
}
+
+ return 1;
}
-static void relocateSection(char *image,
+static int relocateSection(char *image,
struct symtab_command *symLC, struct nlist *nlist,
struct section* sections, struct section *sect)
{
int i,n;
if(!strcmp(sect->sectname,"__la_symbol_ptr"))
- return;
+ return 1;
else if(!strcmp(sect->sectname,"__nl_symbol_ptr"))
- return;
+ return 1;
n = sect->nreloc;
relocs = (struct relocation_info*) (image + sect->reloff);
if(reloc->r_pcrel && !reloc->r_extern)
continue;
- if(!reloc->r_pcrel && reloc->r_length == 2)
+ if(reloc->r_length == 2)
{
- unsigned long word;
+ unsigned long word = 0;
unsigned long* wordPtr = (unsigned long*) (image + sect->offset + reloc->r_address);
word = ((unsigned short*) wordPtr)[1] << 16;
word += ((short)relocs[i+1].r_address & (short)0xFFFF);
}
+ else if(reloc->r_type == PPC_RELOC_BR24)
+ {
+ word = *wordPtr;
+ word = (word & 0x03FFFFFC) | (word & 0x02000000) ? 0xFC000000 : 0;
+ }
+
if(!reloc->r_extern)
{
struct nlist *symbol = &nlist[reloc->r_symbolnum];
char *nm = image + symLC->stroff + symbol->n_un.n_strx;
word = (unsigned long) (lookupSymbol(nm));
- ASSERT(word);
+ if(!word)
+ {
+ belch("\nunknown symbol `%s'", nm);
+ return 0;
+ }
+
+ if(reloc->r_pcrel)
+ word -= ((long)image) + sect->offset + reloc->r_address;
}
if(reloc->r_type == GENERIC_RELOC_VANILLA)
+ ((word & (1<<15)) ? 1 : 0);
i++; continue;
}
- continue;
+ else if(reloc->r_type == PPC_RELOC_BR24)
+ {
+ *wordPtr = (*wordPtr & 0xFC000003) | (word & 0x03FFFFFC);
+ continue;
+ }
}
- fprintf(stderr, "unknown reloc\n");
- abort();
- ASSERT(2 + 2 == 5);
+ barf("\nunknown relocation %d",reloc->r_type);
+ return 0;
}
}
+ return 1;
}
static int ocGetNames_MachO(ObjectCode* oc)
indirectSyms = (unsigned long*) (image + dsymLC->indirectsymoff);
if(la_ptrs)
- resolveImports(oc,image,symLC,la_ptrs,indirectSyms,nlist);
+ if(!resolveImports(oc,image,symLC,la_ptrs,indirectSyms,nlist))
+ return 0;
if(nl_ptrs)
- resolveImports(oc,image,symLC,nl_ptrs,indirectSyms,nlist);
+ if(!resolveImports(oc,image,symLC,nl_ptrs,indirectSyms,nlist))
+ return 0;
for(i=0;i<segLC->nsects;i++)
{
- relocateSection(image,symLC,nlist,sections,§ions[i]);
+ if(!relocateSection(image,symLC,nlist,sections,§ions[i]))
+ return 0;
}
/* Free the local symbol table; we won't need it again. */
return 1;
}
+/*
+ * The Mach-O object format uses leading underscores. But not everywhere.
+ * There is a small number of runtime support functions defined in
+ * libcc_dynamic.a whose name does not have a leading underscore.
+ * As a consequence, we can't get their address from C code.
+ * We have to use inline assembler just to take the address of a function.
+ * Yuck.
+ */
+
+static void machoInitSymbolsWithoutUnderscore()
+{
+ void *p;
+
+#undef Sym
+#define Sym(x) \
+ __asm__ ("lis %0,hi16(" #x ")\n\tori %0,%0,lo16(" #x ")" : "=r" (p)); \
+ ghciInsertStrHashTable("(GHCi built-in symbols)", symhash, #x, p);
+
+ RTS_MACHO_NOUNDERLINE_SYMBOLS
+
+}
#endif
projects / ghc-hetmet.git / blobdiff