X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Frts%2FLinker.c;h=e5ad28139f6b2c13148f95d1cd73d446a5422d2c;hb=1da969c52be2e56893625957162cf56dd1168ec9;hp=ab582230da2da54839cb391acbbd61246d0aa590;hpb=0bffc410964e1688ad80d277d53400659e697ab5;p=ghc-hetmet.git diff --git a/ghc/rts/Linker.c b/ghc/rts/Linker.c index ab58223..e5ad281 100644 --- a/ghc/rts/Linker.c +++ b/ghc/rts/Linker.c @@ -1,7 +1,7 @@ /* ----------------------------------------------------------------------------- - * $Id: Linker.c,v 1.107 2002/12/11 15:36:42 simonmar Exp $ + * $Id: Linker.c,v 1.121 2003/06/09 13:17:40 matthewc Exp $ * - * (c) The GHC Team, 2000, 2001 + * (c) The GHC Team, 2000-2003 * * RTS Object Linker * @@ -59,7 +59,7 @@ #include #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 @@ -91,6 +91,8 @@ static int ocResolve_PEi386 ( 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 /* ----------------------------------------------------------------------------- @@ -203,11 +205,7 @@ typedef struct _RtsSymbolVal { 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 /**/ @@ -216,9 +214,20 @@ typedef struct _RtsSymbolVal { #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) \ @@ -278,11 +287,8 @@ typedef struct _RtsSymbolVal { 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 @@ -295,7 +301,6 @@ typedef struct _RtsSymbolVal { Maybe_ForeignObj \ Maybe_Stable_Names \ Sym(StgReturn) \ - Sym(init_stack) \ SymX(stg_enter_info) \ SymX(stg_enter_ret) \ SymX(stg_gc_void_info) \ @@ -330,7 +335,6 @@ typedef struct _RtsSymbolVal { SymX(ErrorHdrHook) \ MAIN_CAP_SYM \ SymX(MallocFailHook) \ - SymX(NoRunnableThreadsHook) \ SymX(OnExitHook) \ SymX(OutOfHeapHook) \ SymX(PatErrorHdrHook) \ @@ -393,7 +397,7 @@ typedef struct _RtsSymbolVal { SymX(newArrayzh_fast) \ SymX(newBCOzh_fast) \ SymX(newByteArrayzh_fast) \ - SymX(newCAF) \ + SymX_redirect(newCAF, newDynCAF) \ SymX(newMVarzh_fast) \ SymX(newMutVarzh_fast) \ SymX(atomicModifyMutVarzh_fast) \ @@ -423,10 +427,12 @@ typedef struct _RtsSymbolVal { 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) \ @@ -437,6 +443,7 @@ typedef struct _RtsSymbolVal { SymX(rts_mkInt64) \ SymX(rts_mkInt8) \ SymX(rts_mkPtr) \ + SymX(rts_mkFunPtr) \ SymX(rts_mkStablePtr) \ SymX(rts_mkString) \ SymX(rts_mkWord) \ @@ -444,8 +451,11 @@ typedef struct _RtsSymbolVal { 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) \ @@ -532,12 +542,9 @@ typedef struct _RtsSymbolVal { #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) \ @@ -546,21 +553,40 @@ typedef struct _RtsSymbolVal { Sym(__ashrdi3) \ Sym(__lshrdi3) \ Sym(__eprintf) +#elif defined(ia64_TARGET_ARCH) +#define RTS_LIBGCC_SYMBOLS \ + Sym(__divdi3) \ + Sym(__udivdi3) \ + Sym(__moddi3) \ + Sym(__umoddi3) \ + Sym(__divsf3) \ + Sym(__divdf3) #else -#define RTS_EXTRA_SYMBOLS /* nothing */ +#define RTS_LIBGCC_SYMBOLS +#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 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) @@ -572,13 +598,19 @@ RTS_CYGWIN_ONLY_SYMBOLS (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_EXTRA_SYMBOLS RTS_POSIX_ONLY_SYMBOLS RTS_MINGW_ONLY_SYMBOLS RTS_CYGWIN_ONLY_SYMBOLS + RTS_LIBGCC_SYMBOLS { 0, 0 } /* sentinel */ }; @@ -646,6 +678,10 @@ initLinker( void ) 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 @@ -741,13 +777,13 @@ addDLL( char *dll_name ) 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" ); @@ -923,7 +959,7 @@ loadObj( char *path ) # elif defined(OBJFORMAT_MACHO) oc->formatName = "Mach-O"; # else - free(oc); + stgFree(oc); barf("loadObj: not implemented on this platform"); # endif @@ -1088,14 +1124,14 @@ unloadObj( char *path ) /* 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; } } @@ -2670,8 +2706,8 @@ do_Elf_Rela_relocations ( ObjectCode* oc, char* ehdrC, #ifdef ELF_FUNCTION_DESC /* If a function, already a function descriptor - we would have to copy it to add an offset. */ - if (S && ELF_ST_TYPE(sym.st_info) == STT_FUNC) - assert(A == 0); + if (S && (ELF_ST_TYPE(sym.st_info) == STT_FUNC) && (A != 0)) + belch("%s: function %s with addend %p", oc->fileName, symbol, (void *)A); #endif } if (!S) { @@ -2730,6 +2766,9 @@ do_Elf_Rela_relocations ( ObjectCode* oc, char* ehdrC, case R_IA64_FPTR64LSB: *pP = value; break; + case R_IA64_PCREL64LSB: + *pP = value - P; + break; case R_IA64_SEGREL64LSB: addr = findElfSegment(ehdrC, value); *pP = value - addr; @@ -2738,6 +2777,7 @@ do_Elf_Rela_relocations ( ObjectCode* oc, char* ehdrC, ia64_reloc_gprel22(P, value); break; case R_IA64_LTOFF22: + case R_IA64_LTOFF22X: case R_IA64_LTOFF_FPTR22: addr = allocateGOTEntry(value); ia64_reloc_gprel22(P, addr); @@ -2745,6 +2785,10 @@ do_Elf_Rela_relocations ( ObjectCode* oc, char* ehdrC, case R_IA64_PCREL21B: ia64_reloc_pcrel21(P, S, oc); break; + case R_IA64_LDXMOV: + /* This goes with R_IA64_LTOFF22X and points to the load to + * convert into a move. We don't implement relaxation. */ + break; # endif default: belch("%s: unhandled ELF relocation(RelA) type %d\n", @@ -2927,7 +2971,7 @@ static int ocVerifyImage_MachO(ObjectCode* oc) return 1; } -static void resolveImports( +static int resolveImports( ObjectCode* oc, char *image, struct symtab_command *symLC, @@ -2953,15 +2997,17 @@ static void resolveImports( 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) { @@ -2969,9 +3015,9 @@ static void relocateSection(char *image, 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); @@ -3001,9 +3047,9 @@ static void relocateSection(char *image, 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); @@ -3026,6 +3072,12 @@ static void relocateSection(char *image, 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) { @@ -3041,7 +3093,14 @@ static void relocateSection(char *image, 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) @@ -3065,13 +3124,17 @@ static void relocateSection(char *image, + ((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) @@ -3231,13 +3294,16 @@ static int ocResolve_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;insects;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. */ @@ -3246,4 +3312,25 @@ static int ocResolve_MachO(ObjectCode* oc) 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