/* -----------------------------------------------------------------------------
- * $Id: Linker.c,v 1.34 2001/03/28 16:40:48 simonmar Exp $
+ * $Id: Linker.c,v 1.72 2001/10/26 11:33:13 sewardj Exp $
*
- * (c) The GHC Team, 2000
+ * (c) The GHC Team, 2000, 2001
*
* RTS Object Linker
*
* ---------------------------------------------------------------------------*/
+#include "PosixSource.h"
#include "Rts.h"
#include "RtsFlags.h"
#include "HsFFI.h"
#include "LinkerInternals.h"
#include "RtsUtils.h"
#include "StoragePriv.h"
+#include "Schedule.h"
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
# define OBJFORMAT_ELF
#elif defined(cygwin32_TARGET_OS) || defined (mingw32_TARGET_OS)
# define OBJFORMAT_PEi386
+# include <windows.h>
#endif
/* Hash table mapping symbol names to Symbol */
#define Maybe_ForeignObj
#define Maybe_Stable_Names
#endif
-
+
+#if !defined (mingw32_TARGET_OS)
+
+#define RTS_POSIX_ONLY_SYMBOLS \
+ SymX(stg_sig_install) \
+ Sym(nocldstop)
+#define RTS_MINGW_ONLY_SYMBOLS /**/
+
+#else
+
+#define RTS_POSIX_ONLY_SYMBOLS
+
+/* 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(memset) \
+ SymX(inet_ntoa) \
+ SymX(inet_addr) \
+ SymX(htonl) \
+ SymX(recvfrom) \
+ SymX(listen) \
+ SymX(bind) \
+ SymX(shutdown) \
+ SymX(connect) \
+ SymX(htons) \
+ SymX(ntohs) \
+ SymX(getservbyname) \
+ SymX(getservbyport) \
+ SymX(getprotobynumber) \
+ SymX(getprotobyname) \
+ SymX(gethostbyname) \
+ SymX(gethostbyaddr) \
+ SymX(gethostname) \
+ SymX(strcpy) \
+ SymX(strncpy) \
+ SymX(abort) \
+ Sym(_alloca) \
+ Sym(isxdigit) \
+ Sym(isupper) \
+ Sym(ispunct) \
+ Sym(islower) \
+ Sym(isspace) \
+ Sym(isprint) \
+ Sym(isdigit) \
+ Sym(iscntrl) \
+ Sym(isalpha) \
+ Sym(isalnum) \
+ SymX(strcmp) \
+ SymX(memmove) \
+ SymX(realloc) \
+ SymX(malloc) \
+ SymX(pow) \
+ SymX(tanh) \
+ SymX(cosh) \
+ SymX(sinh) \
+ SymX(atan) \
+ SymX(acos) \
+ SymX(asin) \
+ SymX(tan) \
+ SymX(cos) \
+ SymX(sin) \
+ SymX(exp) \
+ SymX(log) \
+ SymX(sqrt) \
+ SymX(memcpy) \
+ Sym(mktime) \
+ Sym(_imp___timezone) \
+ Sym(_imp___tzname) \
+ Sym(_imp___iob) \
+ Sym(localtime) \
+ Sym(gmtime) \
+ Sym(opendir) \
+ Sym(readdir) \
+ Sym(closedir) \
+ Sym(__divdi3) \
+ Sym(__udivdi3) \
+ Sym(__moddi3) \
+ Sym(__umoddi3)
+#endif
+
#define RTS_SYMBOLS \
- SymX(MainRegTable) \
+ Maybe_ForeignObj \
+ Maybe_Stable_Names \
+ Sym(StgReturn) \
+ Sym(__stginit_PrelGHC) \
+ Sym(init_stack) \
+ Sym(stg_chk_0) \
+ Sym(stg_chk_1) \
+ Sym(stg_enterStackTop) \
+ Sym(stg_gc_d1) \
Sym(stg_gc_enter_1) \
+ Sym(stg_gc_f1) \
Sym(stg_gc_noregs) \
Sym(stg_gc_seq_1) \
- Sym(stg_gc_d1) \
- Sym(stg_gc_f1) \
- Sym(stg_gc_ut_1_0) \
- Sym(stg_gc_ut_0_1) \
Sym(stg_gc_unbx_r1) \
- Sym(stg_chk_0) \
- Sym(stg_chk_1) \
+ Sym(stg_gc_unpt_r1) \
+ Sym(stg_gc_ut_0_1) \
+ Sym(stg_gc_ut_1_0) \
Sym(stg_gen_chk) \
- SymX(stg_exit) \
- SymX(stg_update_PAP) \
+ Sym(stg_yield_to_interpreter) \
+ SymX(ErrorHdrHook) \
+ SymX(MainRegTable) \
+ SymX(MallocFailHook) \
+ SymX(NoRunnableThreadsHook) \
+ SymX(OnExitHook) \
+ SymX(OutOfHeapHook) \
+ SymX(PatErrorHdrHook) \
+ SymX(PostTraceHook) \
+ SymX(PreTraceHook) \
+ SymX(StackOverflowHook) \
+ SymX(__encodeDouble) \
+ SymX(__encodeFloat) \
+ SymX(__gmpn_gcd_1) \
+ SymX(__gmpz_cmp) \
+ SymX(__gmpz_cmp_si) \
+ SymX(__gmpz_cmp_ui) \
+ SymX(__gmpz_get_si) \
+ SymX(__gmpz_get_ui) \
+ SymX(__int_encodeDouble) \
+ SymX(__int_encodeFloat) \
+ SymX(andIntegerzh_fast) \
+ SymX(blockAsyncExceptionszh_fast) \
+ SymX(catchzh_fast) \
+ SymX(cmp_thread) \
+ SymX(complementIntegerzh_fast) \
+ SymX(createAdjustor) \
+ SymX(decodeDoublezh_fast) \
+ SymX(decodeFloatzh_fast) \
+ SymX(defaultsHook) \
+ SymX(delayzh_fast) \
+ SymX(divExactIntegerzh_fast) \
+ SymX(divModIntegerzh_fast) \
+ SymX(forkzh_fast) \
+ SymX(freeHaskellFunctionPtr) \
+ SymX(gcdIntegerzh_fast) \
+ SymX(getProgArgv) \
+ SymX(getStablePtr) \
+ SymX(int2Integerzh_fast) \
+ SymX(isDoubleDenormalized) \
+ SymX(isDoubleInfinite) \
+ SymX(isDoubleNaN) \
+ SymX(isDoubleNegativeZero) \
+ SymX(isFloatDenormalized) \
+ SymX(isFloatInfinite) \
+ SymX(isFloatNaN) \
+ SymX(isFloatNegativeZero) \
+ SymX(killThreadzh_fast) \
+ SymX(minusIntegerzh_fast) \
+ SymX(mkApUpd0zh_fast) \
+ SymX(newArrayzh_fast) \
+ SymX(newBCOzh_fast) \
+ SymX(newByteArrayzh_fast) \
+ SymX(newCAF) \
+ SymX(newMVarzh_fast) \
+ SymX(newMutVarzh_fast) \
+ SymX(newPinnedByteArrayzh_fast) \
+ SymX(orIntegerzh_fast) \
+ SymX(performGC) \
+ SymX(plusIntegerzh_fast) \
+ SymX(prog_argc) \
+ SymX(prog_argv) \
+ SymX(putMVarzh_fast) \
+ SymX(quotIntegerzh_fast) \
+ SymX(quotRemIntegerzh_fast) \
+ SymX(raisezh_fast) \
+ SymX(remIntegerzh_fast) \
+ SymX(resetNonBlockingFd) \
+ SymX(resumeThread) \
+ SymX(rts_apply) \
+ SymX(rts_checkSchedStatus) \
+ SymX(rts_eval) \
+ SymX(rts_evalIO) \
+ SymX(rts_evalLazyIO) \
+ SymX(rts_eval_) \
+ SymX(rts_getAddr) \
+ SymX(rts_getBool) \
+ SymX(rts_getChar) \
+ SymX(rts_getDouble) \
+ SymX(rts_getFloat) \
+ SymX(rts_getInt) \
+ SymX(rts_getInt32) \
+ SymX(rts_getPtr) \
+ SymX(rts_getStablePtr) \
+ SymX(rts_getWord) \
+ SymX(rts_getWord32) \
+ SymX(rts_mkAddr) \
+ SymX(rts_mkBool) \
+ SymX(rts_mkChar) \
+ SymX(rts_mkDouble) \
+ SymX(rts_mkFloat) \
+ SymX(rts_mkInt) \
+ SymX(rts_mkInt16) \
+ SymX(rts_mkInt32) \
+ SymX(rts_mkInt64) \
+ SymX(rts_mkInt8) \
+ SymX(rts_mkPtr) \
+ SymX(rts_mkStablePtr) \
+ SymX(rts_mkString) \
+ SymX(rts_mkWord) \
+ SymX(rts_mkWord16) \
+ SymX(rts_mkWord32) \
+ SymX(rts_mkWord64) \
+ SymX(rts_mkWord8) \
+ SymX(run_queue_hd) \
+ SymX(setProgArgv) \
+ SymX(shutdownHaskellAndExit) \
+ SymX(stable_ptr_table) \
+ SymX(stackOverflow) \
+ SymX(stg_CAF_BLACKHOLE_info) \
+ SymX(stg_CHARLIKE_closure) \
+ SymX(stg_EMPTY_MVAR_info) \
+ SymX(stg_IND_STATIC_info) \
+ SymX(stg_INTLIKE_closure) \
+ SymX(stg_MUT_ARR_PTRS_FROZEN_info) \
+ SymX(stg_WEAK_info) \
+ SymX(stg_ap_1_upd_info) \
SymX(stg_ap_2_upd_info) \
SymX(stg_ap_3_upd_info) \
SymX(stg_ap_4_upd_info) \
SymX(stg_ap_6_upd_info) \
SymX(stg_ap_7_upd_info) \
SymX(stg_ap_8_upd_info) \
+ SymX(stg_exit) \
SymX(stg_sel_0_upd_info) \
+ SymX(stg_sel_10_upd_info) \
+ SymX(stg_sel_11_upd_info) \
+ SymX(stg_sel_12_upd_info) \
+ SymX(stg_sel_13_upd_info) \
+ SymX(stg_sel_14_upd_info) \
+ SymX(stg_sel_15_upd_info) \
SymX(stg_sel_1_upd_info) \
SymX(stg_sel_2_upd_info) \
SymX(stg_sel_3_upd_info) \
SymX(stg_sel_7_upd_info) \
SymX(stg_sel_8_upd_info) \
SymX(stg_sel_9_upd_info) \
- SymX(stg_sel_10_upd_info) \
- SymX(stg_sel_11_upd_info) \
- SymX(stg_sel_12_upd_info) \
- SymX(stg_sel_13_upd_info) \
- SymX(stg_sel_14_upd_info) \
- SymX(stg_sel_15_upd_info) \
- SymX(stg_upd_frame_info) \
SymX(stg_seq_frame_info) \
- SymX(stg_CAF_BLACKHOLE_info) \
- SymX(stg_IND_STATIC_info) \
- SymX(stg_EMPTY_MVAR_info) \
- SymX(stg_MUT_ARR_PTRS_FROZEN_info) \
- SymX(stg_WEAK_info) \
- SymX(stg_CHARLIKE_closure) \
- SymX(stg_INTLIKE_closure) \
- SymX(newCAF) \
- SymX(newBCOzh_fast) \
- SymX(mkApUpd0zh_fast) \
- SymX(putMVarzh_fast) \
- SymX(newMVarzh_fast) \
+ SymX(stg_upd_frame_info) \
+ SymX(stg_update_PAP) \
+ SymX(suspendThread) \
SymX(takeMVarzh_fast) \
- SymX(tryTakeMVarzh_fast) \
+ SymX(timesIntegerzh_fast) \
SymX(tryPutMVarzh_fast) \
- SymX(catchzh_fast) \
- SymX(raisezh_fast) \
- SymX(forkzh_fast) \
- SymX(delayzh_fast) \
- SymX(yieldzh_fast) \
- SymX(killThreadzh_fast) \
+ SymX(tryTakeMVarzh_fast) \
+ SymX(unblockAsyncExceptionszh_fast) \
+ SymX(unsafeThawArrayzh_fast) \
SymX(waitReadzh_fast) \
SymX(waitWritezh_fast) \
- SymX(suspendThread) \
- SymX(resumeThread) \
- SymX(stackOverflow) \
- SymX(int2Integerzh_fast) \
SymX(word2Integerzh_fast) \
- Maybe_ForeignObj \
- SymX(__encodeDouble) \
- SymX(decodeDoublezh_fast) \
- SymX(decodeFloatzh_fast) \
- SymX(gcdIntegerzh_fast) \
- SymX(newArrayzh_fast) \
- SymX(unsafeThawArrayzh_fast) \
- SymX(newByteArrayzh_fast) \
- SymX(newMutVarzh_fast) \
- SymX(quotRemIntegerzh_fast) \
- SymX(quotIntegerzh_fast) \
- SymX(remIntegerzh_fast) \
- SymX(divExactIntegerzh_fast) \
- SymX(divModIntegerzh_fast) \
- SymX(timesIntegerzh_fast) \
- SymX(minusIntegerzh_fast) \
- SymX(plusIntegerzh_fast) \
- SymX(andIntegerzh_fast) \
- SymX(orIntegerzh_fast) \
SymX(xorIntegerzh_fast) \
- SymX(complementIntegerzh_fast) \
- Maybe_Stable_Names \
- SymX(blockAsyncExceptionszh_fast) \
- SymX(unblockAsyncExceptionszh_fast) \
- SymX(isDoubleNaN) \
- SymX(isDoubleInfinite) \
- SymX(isDoubleDenormalized) \
- SymX(isDoubleNegativeZero) \
- SymX(__encodeFloat) \
- SymX(isFloatNaN) \
- SymX(isFloatInfinite) \
- SymX(isFloatDenormalized) \
- SymX(isFloatNegativeZero) \
- SymX(__int_encodeFloat) \
- SymX(__int_encodeDouble) \
- SymX(__gmpz_cmp_si) \
- SymX(__gmpz_cmp_ui) \
- SymX(__gmpz_cmp) \
- SymX(__gmpn_gcd_1) \
- SymX(prog_argv) \
- SymX(prog_argc) \
- SymX(resetNonBlockingFd) \
- SymX(performGC) \
- SymX(getStablePtr) \
- SymX(stable_ptr_table) \
- SymX(shutdownHaskellAndExit) \
- Sym(stg_enterStackTop) \
- Sym(stg_yield_to_interpreter) \
- Sym(StgReturn) \
- Sym(init_stack) \
- SymX(cmp_thread) \
- Sym(__init_PrelGHC) \
- SymX(freeHaskellFunctionPtr) \
- SymX(OnExitHook) \
- SymX(ErrorHdrHook) \
- SymX(NoRunnableThreadsHook) \
- SymX(StackOverflowHook) \
- SymX(OutOfHeapHook) \
- SymX(MallocFailHook) \
- SymX(PatErrorHdrHook) \
- SymX(defaultsHook) \
- SymX(PreTraceHook) \
- SymX(PostTraceHook) \
- SymX(stg_sig_install) \
- Sym(nocldstop) \
- SymX(createAdjustor) \
- SymX(rts_mkInt) \
- SymX(rts_mkStablePtr) \
- SymX(rts_apply) \
- SymX(rts_evalIO) \
- SymX(rts_checkSchedStatus) \
- SymX(rts_getInt)
+ SymX(yieldzh_fast)
#ifndef SUPPORT_LONG_LONGS
#define RTS_LONG_LONG_SYMS /* nothing */
#else
-#define RTS_LONG_LONG_SYMS \
- SymX(stg_gtWord64) \
- SymX(stg_geWord64) \
- SymX(stg_eqWord64) \
- SymX(stg_neWord64) \
- SymX(stg_ltWord64) \
- SymX(stg_leWord64) \
- SymX(stg_gtInt64) \
- SymX(stg_geInt64) \
- SymX(stg_eqInt64) \
- SymX(stg_neInt64) \
- SymX(stg_ltInt64) \
- SymX(stg_leInt64) \
- SymX(stg_remWord64) \
- SymX(stg_quotWord64) \
- SymX(stg_remInt64) \
- SymX(stg_quotInt64) \
- SymX(stg_negateInt64) \
- SymX(stg_plusInt64) \
- SymX(stg_minusInt64) \
- SymX(stg_timesInt64) \
- SymX(stg_and64) \
- SymX(stg_or64) \
- SymX(stg_xor64) \
- SymX(stg_not64) \
- SymX(stg_shiftL64) \
- SymX(stg_shiftRL64) \
- SymX(stg_iShiftL64) \
- SymX(stg_iShiftRL64) \
- SymX(stg_iShiftRA64) \
- SymX(stg_intToInt64) \
- SymX(stg_int64ToInt) \
- SymX(stg_int64ToWord64) \
- SymX(stg_wordToWord64) \
- SymX(stg_word64ToWord) \
- SymX(stg_word64ToInt64) \
+#define RTS_LONG_LONG_SYMS \
SymX(int64ToIntegerzh_fast) \
SymX(word64ToIntegerzh_fast)
#endif /* SUPPORT_LONG_LONGS */
#define Sym(vvv) extern void (vvv);
#define SymX(vvv) /**/
RTS_SYMBOLS
+RTS_LONG_LONG_SYMS
+RTS_POSIX_ONLY_SYMBOLS
+RTS_MINGW_ONLY_SYMBOLS
#undef Sym
#undef SymX
static RtsSymbolVal rtsSyms[] = {
RTS_SYMBOLS
RTS_LONG_LONG_SYMS
+ RTS_POSIX_ONLY_SYMBOLS
+ RTS_MINGW_ONLY_SYMBOLS
{ 0, 0 } /* sentinel */
};
/* -----------------------------------------------------------------------------
+ * Insert symbols into hash tables, checking for duplicates.
+ */
+static void ghciInsertStrHashTable ( char* obj_name,
+ HashTable *table,
+ char* key,
+ void *data
+ )
+{
+ if (lookupHashTable(table, (StgWord)key) == NULL)
+ {
+ insertStrHashTable(table, (StgWord)key, data);
+ return;
+ }
+ fprintf(stderr,
+ "\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
+ );
+ exit(1);
+}
+
+
+/* -----------------------------------------------------------------------------
* initialize the object linker
*/
#if defined(OBJFORMAT_ELF)
/* populate the symbol table with stuff from the RTS */
for (sym = rtsSyms; sym->lbl != NULL; sym++) {
- insertStrHashTable(symhash, sym->lbl, sym->addr);
+ ghciInsertStrHashTable("(GHCi built-in symbols)",
+ symhash, sym->lbl, sym->addr);
}
# if defined(OBJFORMAT_ELF)
dl_prog_handle = dlopen(NULL, RTLD_LAZY);
* 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
- * dl-handle. Returns 0 if fail, 1 if success.
+ * dl-handle. Returns NULL if success, otherwise ptr to an err msg.
+ *
+ * In the PEi386 case, open the DLLs and put handles to them in a
+ * linked list. When looking for a symbol, try all handles in the
+ * list.
*/
+
+#if defined(OBJFORMAT_PEi386)
+/* A record for storing handles into DLLs. */
+
+typedef
+ struct _OpenedDLL {
+ char* name;
+ struct _OpenedDLL* next;
+ HINSTANCE instance;
+ }
+ OpenedDLL;
+
+/* A list thereof. */
+static OpenedDLL* opened_dlls = NULL;
+#endif
+
+
+
char*
-addDLL ( char* dll_name )
+addDLL ( __attribute((unused)) char* path, char* dll_name )
{
# if defined(OBJFORMAT_ELF)
void *hdl;
char *buf;
char *errmsg;
- buf = stgMallocBytes(strlen(dll_name) + 10, "addDll");
- sprintf(buf, "lib%s.so", dll_name);
+ if (path == NULL || strlen(path) == 0) {
+ buf = stgMallocBytes(strlen(dll_name) + 10, "addDll");
+ sprintf(buf, "lib%s.so", dll_name);
+ } else {
+ buf = stgMallocBytes(strlen(path) + 1 + strlen(dll_name) + 10, "addDll");
+ sprintf(buf, "%s/lib%s.so", path, dll_name);
+ }
hdl = dlopen(buf, RTLD_NOW | RTLD_GLOBAL );
free(buf);
if (hdl == NULL) {
} else {
return NULL;
}
- ASSERT(0); /*NOTREACHED*/
+ /*NOTREACHED*/
+
# elif defined(OBJFORMAT_PEi386)
- barf("addDLL: not implemented on PEi386 yet");
- return 0;
+
+ /* Add this DLL to the list of DLLs in which to search for symbols.
+ The path argument is ignored. */
+ char* buf;
+ OpenedDLL* o_dll;
+ HINSTANCE instance;
+
+ /* fprintf(stderr, "\naddDLL; path=`%s', dll_name = `%s'\n", path, dll_name); */
+
+ /* 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;
+ }
+
+ buf = stgMallocBytes(strlen(dll_name) + 10, "addDLL");
+ sprintf(buf, "%s.DLL", dll_name);
+ instance = LoadLibrary(buf);
+ free(buf);
+ if (instance == NULL) {
+ /* LoadLibrary failed; return a ptr to the error msg. */
+ return "addDLL: unknown error";
+ }
+
+ o_dll = stgMallocBytes( sizeof(OpenedDLL), "addDLL" );
+ o_dll->name = stgMallocBytes(1+strlen(dll_name), "addDLL");
+ strcpy(o_dll->name, dll_name);
+ o_dll->instance = instance;
+ o_dll->next = opened_dlls;
+ opened_dlls = o_dll;
+
+ return NULL;
# else
barf("addDLL: not implemented on this platform");
# endif
# if defined(OBJFORMAT_ELF)
return dlsym(dl_prog_handle, lbl);
# elif defined(OBJFORMAT_PEi386)
+ OpenedDLL* o_dll;
+ void* sym;
+ for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next) {
+ /* fprintf(stderr, "look in %s for %s\n", o_dll->name, lbl); */
+ if (lbl[0] == '_') {
+ /* HACK: if the name has an initial underscore, try stripping
+ it off & look that up first. I've yet to verify whether there's
+ a Rule that governs whether an initial '_' *should always* be
+ stripped off when mapping from import lib name to the DLL name.
+ */
+ sym = GetProcAddress(o_dll->instance, (lbl+1));
+ if (sym != NULL) {
+ /*fprintf(stderr, "found %s in %s\n", lbl+1,o_dll->name); fflush(stderr);*/
+ return sym;
+ }
+ }
+ sym = GetProcAddress(o_dll->instance, lbl);
+ if (sym != NULL) {
+ /*fprintf(stderr, "found %s in %s\n", lbl,o_dll->name); fflush(stderr);*/
+ return sym;
+ }
+ }
+ return NULL;
+# else
ASSERT(2+2 == 5);
return NULL;
# endif
/* -----------------------------------------------------------------------------
+ * Debugging aid: look in GHCi's object symbol tables for symbols
+ * within DELTA bytes of the specified address, and show their names.
+ */
+#ifdef DEBUG
+void ghci_enquire ( char* addr );
+
+void ghci_enquire ( char* addr )
+{
+ int i;
+ char* sym;
+ char* a;
+ const int DELTA = 64;
+ ObjectCode* oc;
+ for (oc = objects; oc; oc = oc->next) {
+ 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); */
+ a = NULL;
+ if (oc->lochash != NULL)
+ a = lookupStrHashTable(oc->lochash, sym);
+ if (a == NULL)
+ a = lookupStrHashTable(symhash, sym);
+ if (a == NULL) {
+ /* 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);
+ }
+ }
+ }
+}
+#endif
+
+
+/* -----------------------------------------------------------------------------
* Load an obj (populate the global symbol table, but don't resolve yet)
*
* Returns: 1 if ok, 0 on error.
int r, n;
FILE *f;
-# ifdef DEBUG
- /* assert that we haven't already loaded this object */
+ /* fprintf(stderr, "loadObj %s\n", path ); */
+
+ /* Check that we haven't already loaded this object. Don't give up
+ at this stage; ocGetNames_* will barf later. */
{
ObjectCode *o;
- for (o = objects; o; o = o->next)
- ASSERT(strcmp(o->fileName, path));
+ int is_dup = 0;
+ for (o = objects; o; o = o->next) {
+ if (0 == strcmp(o->fileName, path))
+ is_dup = 1;
+ }
+ if (is_dup) {
+ fprintf(stderr,
+ "\n\n"
+ "GHCi runtime linker: warning: looks like you're trying to load the\n"
+ "same object file twice:\n"
+ " %s\n"
+ "GHCi will continue, but a duplicate-symbol error may shortly follow.\n"
+ "\n"
+ , path);
+ }
}
-# endif /* DEBUG */
oc = stgMallocBytes(sizeof(ObjectCode), "loadObj(oc)");
oc->symbols = NULL;
oc->sections = NULL;
oc->lochash = allocStrHashTable();
+ oc->proddables = NULL;
/* chain it onto the list of objects */
oc->next = objects;
return 0;
}
+/* -----------------------------------------------------------------------------
+ * Sanity checking. For each ObjectCode, maintain a list of address ranges
+ * which may be prodded during relocation, and abort if we try and write
+ * outside any of these.
+ */
+static void addProddableBlock ( ObjectCode* oc, void* start, int size )
+{
+ ProddableBlock* pb
+ = stgMallocBytes(sizeof(ProddableBlock), "addProddableBlock");
+ /* fprintf(stderr, "aPB %p %p %d\n", oc, start, size); */
+ ASSERT(size > 0);
+ pb->start = start;
+ pb->size = size;
+ pb->next = oc->proddables;
+ oc->proddables = pb;
+}
+
+static void checkProddableBlock ( ObjectCode* oc, void* addr )
+{
+ ProddableBlock* pb;
+ for (pb = oc->proddables; pb != NULL; pb = pb->next) {
+ char* s = (char*)(pb->start);
+ char* e = s + pb->size - 1;
+ char* a = (char*)addr;
+ /* Assumes that the biggest fixup involves a 4-byte write. This
+ probably needs to be changed to 8 (ie, +7) on 64-bit
+ plats. */
+ if (a >= s && (a+3) <= e) return;
+ }
+ barf("checkProddableBlock: invalid fixup in runtime linker");
+}
+
+/* -----------------------------------------------------------------------------
+ * Section management.
+ */
+static void addSection ( ObjectCode* oc, SectionKind kind,
+ void* start, void* end )
+{
+ Section* s = stgMallocBytes(sizeof(Section), "addSection");
+ s->start = start;
+ s->end = end;
+ s->kind = kind;
+ s->next = oc->sections;
+ oc->sections = s;
+}
+
+
+
/* --------------------------------------------------------------------------
* PEi386 specifics (Win32 targets)
* ------------------------------------------------------------------------*/
/* From PE spec doc, section 3.3.2 */
-#define IMAGE_FILE_RELOCS_STRIPPED 0x0001
-#define IMAGE_FILE_EXECUTABLE_IMAGE 0x0002
-#define IMAGE_FILE_DLL 0x2000
-#define IMAGE_FILE_SYSTEM 0x1000
-#define IMAGE_FILE_BYTES_REVERSED_HI 0x8000
-#define IMAGE_FILE_BYTES_REVERSED_LO 0x0080
-#define IMAGE_FILE_32BIT_MACHINE 0x0100
+/* Note use of MYIMAGE_* since IMAGE_* are already defined in
+ windows.h -- for the same purpose, but I want to know what I'm
+ getting, here. */
+#define MYIMAGE_FILE_RELOCS_STRIPPED 0x0001
+#define MYIMAGE_FILE_EXECUTABLE_IMAGE 0x0002
+#define MYIMAGE_FILE_DLL 0x2000
+#define MYIMAGE_FILE_SYSTEM 0x1000
+#define MYIMAGE_FILE_BYTES_REVERSED_HI 0x8000
+#define MYIMAGE_FILE_BYTES_REVERSED_LO 0x0080
+#define MYIMAGE_FILE_32BIT_MACHINE 0x0100
/* From PE spec doc, section 5.4.2 and 5.4.4 */
-#define IMAGE_SYM_CLASS_EXTERNAL 2
-#define IMAGE_SYM_CLASS_STATIC 3
-#define IMAGE_SYM_UNDEFINED 0
+#define MYIMAGE_SYM_CLASS_EXTERNAL 2
+#define MYIMAGE_SYM_CLASS_STATIC 3
+#define MYIMAGE_SYM_UNDEFINED 0
/* From PE spec doc, section 4.1 */
-#define IMAGE_SCN_CNT_CODE 0x00000020
-#define IMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040
+#define MYIMAGE_SCN_CNT_CODE 0x00000020
+#define MYIMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040
/* From PE spec doc, section 5.2.1 */
-#define IMAGE_REL_I386_DIR32 0x0006
-#define IMAGE_REL_I386_REL32 0x0014
+#define MYIMAGE_REL_I386_DIR32 0x0006
+#define MYIMAGE_REL_I386_REL32 0x0014
/* We use myindex to calculate array addresses, rather than
COFF_section* sectab;
COFF_symbol* symtab;
UChar* strtab;
-
+ /* fprintf(stderr, "\nLOADING %s\n", oc->fileName); */
hdr = (COFF_header*)(oc->image);
sectab = (COFF_section*) (
((UChar*)(oc->image))
((UChar*)(oc->image))
+ hdr->PointerToSymbolTable
);
- strtab = ((UChar*)(oc->image))
- + hdr->PointerToSymbolTable
+ strtab = ((UChar*)symtab)
+ hdr->NumberOfSymbols * sizeof_COFF_symbol;
if (hdr->Machine != 0x14c) {
belch("PEi386 with nonempty optional header");
return 0;
}
- if ( /* (hdr->Characteristics & IMAGE_FILE_RELOCS_STRIPPED) || */
- (hdr->Characteristics & IMAGE_FILE_EXECUTABLE_IMAGE) ||
- (hdr->Characteristics & IMAGE_FILE_DLL) ||
- (hdr->Characteristics & IMAGE_FILE_SYSTEM) ) {
+ if ( /* (hdr->Characteristics & MYIMAGE_FILE_RELOCS_STRIPPED) || */
+ (hdr->Characteristics & MYIMAGE_FILE_EXECUTABLE_IMAGE) ||
+ (hdr->Characteristics & MYIMAGE_FILE_DLL) ||
+ (hdr->Characteristics & MYIMAGE_FILE_SYSTEM) ) {
belch("Not a PEi386 object file");
return 0;
}
- if ( (hdr->Characteristics & IMAGE_FILE_BYTES_REVERSED_HI) ||
- !(hdr->Characteristics & IMAGE_FILE_32BIT_MACHINE) ) {
- belch("Invalid PEi386 word size or endiannness");
+ if ( (hdr->Characteristics & MYIMAGE_FILE_BYTES_REVERSED_HI)
+ /* || !(hdr->Characteristics & MYIMAGE_FILE_32BIT_MACHINE) */ ) {
+ belch("Invalid PEi386 word size or endiannness: %d",
+ (int)(hdr->Characteristics));
+ return 0;
+ }
+ /* If the string table size is way crazy, this might indicate that
+ there are more than 64k relocations, despite claims to the
+ contrary. Hence this test. */
+ /* fprintf(stderr, "strtab size %d\n", * (UInt32*)strtab); */
+ if (* (UInt32*)strtab > 600000) {
+ /* Note that 600k has no special significance other than being
+ big enough to handle the almost-2MB-sized lumps that
+ constitute HSwin32*.o. */
+ belch("PEi386 object has suspiciously large string table; > 64k relocs?");
return 0;
}
fprintf ( stderr,
"characteristics: 0x%x\n", (UInt32)(hdr->Characteristics) );
- fprintf ( stderr, "\n" );
- fprintf ( stderr, "string table has size 0x%x\n", * (UInt32*)strtab );
- fprintf ( stderr, "---START of string table---\n");
- for (i = 4; i < *(Int32*)strtab; i++) {
- if (strtab[i] == 0)
- fprintf ( stderr, "\n"); else
- fprintf( stderr, "%c", strtab[i] );
- }
- fprintf ( stderr, "--- END of string table---\n");
-
+ /* Print the section table. */
fprintf ( stderr, "\n" );
for (i = 0; i < hdr->NumberOfSections; i++) {
COFF_reloc* reltab;
" data sz %d\n"
" data off %d\n"
" num rel %d\n"
- " off rel %d\n",
+ " off rel %d\n"
+ " ptr raw 0x%x\n",
sectab_i->VirtualSize,
sectab_i->VirtualAddress,
sectab_i->SizeOfRawData,
sectab_i->PointerToRawData,
sectab_i->NumberOfRelocations,
- sectab_i->PointerToRelocations
+ sectab_i->PointerToRelocations,
+ sectab_i->PointerToRawData
);
reltab = (COFF_reloc*) (
((UChar*)(oc->image)) + sectab_i->PointerToRelocations
);
+
for (j = 0; j < sectab_i->NumberOfRelocations; j++) {
COFF_symbol* sym;
COFF_reloc* rel = (COFF_reloc*)
rel->VirtualAddress );
sym = (COFF_symbol*)
myindex ( sizeof_COFF_symbol, symtab, rel->SymbolTableIndex );
- printName ( sym->Name, strtab );
+ printName ( sym->Name, strtab -10 );
fprintf ( stderr, "'\n" );
}
+
fprintf ( stderr, "\n" );
}
-
+ fprintf ( stderr, "\n" );
+ fprintf ( stderr, "string table has size 0x%x\n", * (UInt32*)strtab );
+ fprintf ( stderr, "---START of string table---\n");
+ for (i = 4; i < *(Int32*)strtab; i++) {
+ if (strtab[i] == 0)
+ fprintf ( stderr, "\n"); else
+ fprintf( stderr, "%c", strtab[i] );
+ }
+ fprintf ( stderr, "--- END of string table---\n");
fprintf ( stderr, "\n" );
i = 0;
fprintf ( stderr,
"'\n"
" value 0x%x\n"
- " sec# %d\n"
+ " 1+sec# %d\n"
" type 0x%x\n"
" sclass 0x%x\n"
" nAux %d\n",
symtab_i->Value,
- (Int32)(symtab_i->SectionNumber) - 1,
+ (Int32)(symtab_i->SectionNumber),
(UInt32)symtab_i->Type,
(UInt32)symtab_i->StorageClass,
(UInt32)symtab_i->NumberOfAuxSymbols
}
fprintf ( stderr, "\n" );
-
return 1;
}
+ hdr->PointerToSymbolTable
+ hdr->NumberOfSymbols * sizeof_COFF_symbol;
- /* Copy exported symbols into the ObjectCode. */
-
- oc->n_symbols = hdr->NumberOfSymbols;
- oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
- "ocGetNames_PEi386(oc->symbols)");
- /* Call me paranoid; I don't care. */
- for (i = 0; i < oc->n_symbols; i++)
- oc->symbols[i] = NULL;
-
- i = 0;
- while (1) {
- COFF_symbol* symtab_i;
- if (i >= (Int32)(hdr->NumberOfSymbols)) break;
- symtab_i = (COFF_symbol*)
- myindex ( sizeof_COFF_symbol, symtab, i );
-
- if (symtab_i->StorageClass == IMAGE_SYM_CLASS_EXTERNAL &&
- symtab_i->SectionNumber != IMAGE_SYM_UNDEFINED) {
-
- /* This symbol is global and defined, viz, exported */
- COFF_section* sectabent;
-
- /* cstring_from_COFF_symbol_name always succeeds. */
- sname = cstring_from_COFF_symbol_name ( symtab_i->Name, strtab );
+ /* Allocate space for any (local, anonymous) .bss sections. */
- /* for IMAGE_SYMCLASS_EXTERNAL
- && !IMAGE_SYM_UNDEFINED,
- the address of the symbol is:
- address of relevant section + offset in section
- */
- sectabent = (COFF_section*)
- myindex ( sizeof_COFF_section,
- sectab,
- symtab_i->SectionNumber-1 );
- addr = ((UChar*)(oc->image))
- + (sectabent->PointerToRawData
- + symtab_i->Value);
- IF_DEBUG(linker, belch("addSymbol %p `%s'\n", addr,sname);)
- ASSERT(i >= 0 && i < oc->n_symbols);
- oc->symbols[i] = sname;
- insertStrHashTable(symhash, sname, addr);
- }
- i += symtab_i->NumberOfAuxSymbols;
- i++;
+ for (i = 0; i < hdr->NumberOfSections; i++) {
+ UChar* zspace;
+ COFF_section* sectab_i
+ = (COFF_section*)
+ myindex ( sizeof_COFF_section, sectab, i );
+ if (0 != strcmp(sectab_i->Name, ".bss")) continue;
+ if (sectab_i->VirtualSize == 0) continue;
+ /* This is a non-empty .bss section. Allocate zeroed space for
+ it, and set its PointerToRawData field such that oc->image +
+ PointerToRawData == addr_of_zeroed_space. */
+ zspace = stgCallocBytes(1, sectab_i->VirtualSize,
+ "ocGetNames_PEi386(anonymous bss)");
+ sectab_i->PointerToRawData = ((UChar*)zspace) - ((UChar*)(oc->image));
+ addProddableBlock(oc, zspace, sectab_i->VirtualSize);
+ /* fprintf(stderr, "BSS anon section at 0x%x\n", zspace); */
}
/* Copy section information into the ObjectCode. */
- oc->n_sections = hdr->NumberOfSections;
- oc->sections = stgMallocBytes( oc->n_sections * sizeof(Section),
- "ocGetNamesPEi386" );
-
- for (i = 0; i < oc->n_sections; i++) {
+ for (i = 0; i < hdr->NumberOfSections; i++) {
UChar* start;
UChar* end;
+ UInt32 sz;
SectionKind kind
= SECTIONKIND_OTHER;
COFF_section* sectab_i
= (COFF_section*)
myindex ( sizeof_COFF_section, sectab, i );
- IF_DEBUG(linker, belchf("section name = %s\n", sectab_i->Name ));
+ IF_DEBUG(linker, belch("section name = %s\n", sectab_i->Name ));
-#if 0
+# if 0
/* I'm sure this is the Right Way to do it. However, the
alternative of testing the sectab_i->Name field seems to
work ok with Cygwin.
*/
- if (sectab_i->Characteristics & IMAGE_SCN_CNT_CODE ||
- sectab_i->Characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA)
+ if (sectab_i->Characteristics & MYIMAGE_SCN_CNT_CODE ||
+ sectab_i->Characteristics & MYIMAGE_SCN_CNT_INITIALIZED_DATA)
kind = SECTIONKIND_CODE_OR_RODATA;
-#endif
+# endif
- if (0==strcmp(".text",sectab_i->Name))
+ if (0==strcmp(".text",sectab_i->Name) ||
+ 0==strcmp(".rodata",sectab_i->Name))
kind = SECTIONKIND_CODE_OR_RODATA;
if (0==strcmp(".data",sectab_i->Name) ||
0==strcmp(".bss",sectab_i->Name))
kind = SECTIONKIND_RWDATA;
- start = ((UChar*)(oc->image))
- + sectab_i->PointerToRawData;
- end = start
- + sectab_i->SizeOfRawData - 1;
+ ASSERT(sectab_i->SizeOfRawData == 0 || sectab_i->VirtualSize == 0);
+ sz = sectab_i->SizeOfRawData;
+ if (sz < sectab_i->VirtualSize) sz = sectab_i->VirtualSize;
- if (kind == SECTIONKIND_OTHER) {
+ start = ((UChar*)(oc->image)) + sectab_i->PointerToRawData;
+ end = start + sz - 1;
+
+ if (kind == SECTIONKIND_OTHER
+ /* Ignore sections called which contain stabs debugging
+ information. */
+ && 0 != strcmp(".stab", sectab_i->Name)
+ && 0 != strcmp(".stabstr", sectab_i->Name)
+ ) {
belch("Unknown PEi386 section name `%s'", sectab_i->Name);
return 0;
}
- oc->sections[i].start = start;
- oc->sections[i].end = end;
- oc->sections[i].kind = kind;
+ if (kind != SECTIONKIND_OTHER && end >= start) {
+ addSection(oc, kind, start, end);
+ addProddableBlock(oc, start, end - start + 1);
+ }
+ }
+
+ /* Copy exported symbols into the ObjectCode. */
+
+ oc->n_symbols = hdr->NumberOfSymbols;
+ oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
+ "ocGetNames_PEi386(oc->symbols)");
+ /* Call me paranoid; I don't care. */
+ for (i = 0; i < oc->n_symbols; i++)
+ oc->symbols[i] = NULL;
+
+ i = 0;
+ while (1) {
+ COFF_symbol* symtab_i;
+ if (i >= (Int32)(hdr->NumberOfSymbols)) break;
+ symtab_i = (COFF_symbol*)
+ myindex ( sizeof_COFF_symbol, symtab, i );
+
+ addr = NULL;
+
+ if (symtab_i->StorageClass == MYIMAGE_SYM_CLASS_EXTERNAL
+ && symtab_i->SectionNumber != MYIMAGE_SYM_UNDEFINED) {
+ /* This symbol is global and defined, viz, exported */
+ /* for MYIMAGE_SYMCLASS_EXTERNAL
+ && !MYIMAGE_SYM_UNDEFINED,
+ the address of the symbol is:
+ address of relevant section + offset in section
+ */
+ COFF_section* sectabent
+ = (COFF_section*) myindex ( sizeof_COFF_section,
+ sectab,
+ symtab_i->SectionNumber-1 );
+ addr = ((UChar*)(oc->image))
+ + (sectabent->PointerToRawData
+ + symtab_i->Value);
+ }
+ else
+ if (symtab_i->SectionNumber == MYIMAGE_SYM_UNDEFINED
+ && symtab_i->Value > 0) {
+ /* This symbol isn't in any section at all, ie, global bss.
+ Allocate zeroed space for it. */
+ addr = stgCallocBytes(1, symtab_i->Value,
+ "ocGetNames_PEi386(non-anonymous bss)");
+ addSection(oc, SECTIONKIND_RWDATA, addr,
+ ((UChar*)addr) + symtab_i->Value - 1);
+ addProddableBlock(oc, addr, symtab_i->Value);
+ /* fprintf(stderr, "BSS section at 0x%x\n", addr); */
+ }
+
+ if (addr != NULL) {
+ sname = cstring_from_COFF_symbol_name ( symtab_i->Name, strtab );
+ /* fprintf(stderr,"addSymbol %p `%s'\n", addr,sname); */
+ IF_DEBUG(linker, belch("addSymbol %p `%s'\n", addr,sname);)
+ ASSERT(i >= 0 && i < oc->n_symbols);
+ /* cstring_from_COFF_symbol_name always succeeds. */
+ oc->symbols[i] = sname;
+ ghciInsertStrHashTable(oc->fileName, symhash, sname, addr);
+ } else {
+# if 0
+ fprintf ( stderr,
+ "IGNORING symbol %d\n"
+ " name `",
+ i
+ );
+ printName ( symtab_i->Name, strtab );
+ fprintf ( stderr,
+ "'\n"
+ " value 0x%x\n"
+ " 1+sec# %d\n"
+ " type 0x%x\n"
+ " sclass 0x%x\n"
+ " nAux %d\n",
+ symtab_i->Value,
+ (Int32)(symtab_i->SectionNumber),
+ (UInt32)symtab_i->Type,
+ (UInt32)symtab_i->StorageClass,
+ (UInt32)symtab_i->NumberOfAuxSymbols
+ );
+# endif
+ }
+
+ i += symtab_i->NumberOfAuxSymbols;
+ i++;
}
return 1;
/* ToDo: should be variable-sized? But is at least safe in the
sense of buffer-overrun-proof. */
char symbol[1000];
-
+ /* fprintf(stderr, "resolving for %s\n", oc->fileName); */
+
hdr = (COFF_header*)(oc->image);
sectab = (COFF_section*) (
((UChar*)(oc->image))
= (COFF_reloc*) (
((UChar*)(oc->image)) + sectab_i->PointerToRelocations
);
+
+ /* Ignore sections called which contain stabs debugging
+ information. */
+ if (0 == strcmp(".stab", sectab_i->Name)
+ || 0 == strcmp(".stabstr", sectab_i->Name))
+ continue;
+
for (j = 0; j < sectab_i->NumberOfRelocations; j++) {
COFF_symbol* sym;
COFF_reloc* reltab_j
pP = (UInt32*)(
((UChar*)(oc->image))
+ (sectab_i->PointerToRawData
- + reltab_j->VirtualAddress)
+ + reltab_j->VirtualAddress
+ - sectab_i->VirtualAddress )
);
/* the existing contents of pP */
A = *pP;
printName ( sym->Name, strtab );
fprintf ( stderr, "'\n" ));
- if (sym->StorageClass == IMAGE_SYM_CLASS_STATIC) {
+ if (sym->StorageClass == MYIMAGE_SYM_CLASS_STATIC) {
COFF_section* section_sym
= findPEi386SectionCalled ( oc, sym->Name );
if (!section_sym) {
- fprintf ( stderr, "bad section = `%s'\n", sym->Name );
- barf("Can't find abovementioned PEi386 section");
+ belch("%s: can't find section `%s'", oc->fileName, sym->Name);
return 0;
}
S = ((UInt32)(oc->image))
+ (section_sym->PointerToRawData
+ sym->Value);
} else {
- copyName ( sym->Name, strtab, symbol, 1000 );
+ copyName ( sym->Name, strtab, symbol, 1000-1 );
+ (void*)S = lookupLocalSymbol( oc, symbol );
+ if ((void*)S != NULL) goto foundit;
+ (void*)S = lookupSymbol( symbol );
+ if ((void*)S != NULL) goto foundit;
zapTrailingAtSign ( symbol );
(void*)S = lookupLocalSymbol( oc, symbol );
- if ((void*)S == NULL)
- (void*)S = lookupSymbol( symbol );
- if (S == 0) {
- belch("ocResolve_PEi386: %s: unknown symbol `%s'",
- oc->fileName, symbol);
- return 0;
- }
+ if ((void*)S != NULL) goto foundit;
+ (void*)S = lookupSymbol( symbol );
+ if ((void*)S != NULL) goto foundit;
+ belch("%s: unknown symbol `%s'", oc->fileName, symbol);
+ return 0;
+ foundit:
}
-
+ checkProddableBlock(oc, pP);
switch (reltab_j->Type) {
- case IMAGE_REL_I386_DIR32:
+ case MYIMAGE_REL_I386_DIR32:
*pP = A + S;
break;
- case IMAGE_REL_I386_REL32:
+ case MYIMAGE_REL_I386_REL32:
/* Tricky. We have to insert a displacement at
pP which, when added to the PC for the _next_
insn, gives the address of the target (S).
*pP = S - ((UInt32)pP) - 4;
break;
default:
- fprintf(stderr,
- "unhandled PEi386 relocation type %d\n",
- reltab_j->Type);
- barf("unhandled PEi386 relocation type");
+ belch("%s: unhandled PEi386 relocation type %d",
+ oc->fileName, reltab_j->Type);
return 0;
}
}
}
+ IF_DEBUG(linker, belch("completed %s", oc->fileName));
return 1;
}
#if defined(sparc_TARGET_ARCH)
# define ELF_TARGET_SPARC /* Used inside <elf.h> */
+#elif defined(i386_TARGET_ARCH)
+# define ELF_TARGET_386 /* Used inside <elf.h> */
#endif
+/* There is a similar case for IA64 in the Solaris2 headers if this
+ * ever becomes relevant.
+ */
#include <elf.h>
{
int i;
char* ehdrC = (char*)objImage;
- Elf32_Ehdr* ehdr = ( Elf32_Ehdr*)ehdrC;
- Elf32_Shdr* shdr = (Elf32_Shdr*) (ehdrC + ehdr->e_shoff);
+ Elf32_Ehdr* ehdr = (Elf32_Ehdr*)ehdrC;
+ Elf32_Shdr* shdr = (Elf32_Shdr*)(ehdrC + ehdr->e_shoff);
+ char* sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
char* ptr = NULL;
for (i = 0; i < ehdr->e_shnum; i++) {
- if (shdr[i].sh_type == sh_type &&
- i != ehdr->e_shstrndx) {
+ if (shdr[i].sh_type == sh_type
+ /* Ignore the section header's string table. */
+ && i != ehdr->e_shstrndx
+ /* Ignore string tables named .stabstr, as they contain
+ debugging info. */
+ && 0 != strcmp(".stabstr", sh_strtab + shdr[i].sh_name)
+ ) {
ptr = ehdrC + shdr[i].sh_offset;
break;
}
ehdr->e_ident[EI_MAG1] != ELFMAG1 ||
ehdr->e_ident[EI_MAG2] != ELFMAG2 ||
ehdr->e_ident[EI_MAG3] != ELFMAG3) {
- belch("ocVerifyImage_ELF: not an ELF header");
+ belch("%s: not an ELF header", oc->fileName);
return 0;
}
IF_DEBUG(linker,belch( "Is an ELF header" ));
if (ehdr->e_ident[EI_CLASS] != ELFCLASS32) {
- belch("ocVerifyImage_ELF: not 32 bit ELF" );
+ belch("%s: not 32 bit ELF", oc->fileName);
return 0;
}
if (ehdr->e_ident[EI_DATA] == ELFDATA2MSB) {
IF_DEBUG(linker,belch( "Is big-endian" ));
} else {
- belch("ocVerifyImage_ELF: unknown endiannness");
+ belch("%s: unknown endiannness", oc->fileName);
return 0;
}
if (ehdr->e_type != ET_REL) {
- belch("ocVerifyImage_ELF: not a relocatable object (.o) file");
+ belch("%s: not a relocatable object (.o) file", oc->fileName);
return 0;
}
IF_DEBUG(linker, belch( "Is a relocatable object (.o) file" ));
case EM_386: IF_DEBUG(linker,belch( "x86" )); break;
case EM_SPARC: IF_DEBUG(linker,belch( "sparc" )); break;
default: IF_DEBUG(linker,belch( "unknown" ));
- belch("ocVerifyImage_ELF: unknown architecture");
+ belch("%s: unknown architecture", oc->fileName);
return 0;
}
shdr = (Elf32_Shdr*) (ehdrC + ehdr->e_shoff);
if (ehdr->e_shstrndx == SHN_UNDEF) {
- belch("ocVerifyImage_ELF: no section header string table");
+ belch("%s: no section header string table", oc->fileName);
return 0;
} else {
IF_DEBUG(linker,belch( "Section header string table is section %d",
strtab = NULL;
nstrtab = 0;
for (i = 0; i < ehdr->e_shnum; i++) {
- if (shdr[i].sh_type == SHT_STRTAB &&
- i != ehdr->e_shstrndx) {
- IF_DEBUG(linker,belch(" section %d is a normal string table", i ));
+ if (shdr[i].sh_type == SHT_STRTAB
+ /* Ignore the section header's string table. */
+ && i != ehdr->e_shstrndx
+ /* Ignore string tables named .stabstr, as they contain
+ debugging info. */
+ && 0 != strcmp(".stabstr", sh_strtab + shdr[i].sh_name)
+ ) {
+ IF_DEBUG(linker,belch(" section %d is a normal string table", i ));
strtab = ehdrC + shdr[i].sh_offset;
nstrtab++;
}
}
if (nstrtab != 1) {
- belch("ocVerifyImage_ELF: no string tables, or too many");
+ belch("%s: no string tables, or too many", oc->fileName);
return 0;
}
shdr[i].sh_size % sizeof(Elf32_Sym)
));
if (0 != shdr[i].sh_size % sizeof(Elf32_Sym)) {
- belch("ocVerifyImage_ELF: non-integral number of symbol table entries");
+ belch("%s: non-integral number of symbol table entries", oc->fileName);
return 0;
}
for (j = 0; j < nent; j++) {
}
if (nsymtabs == 0) {
- belch("ocVerifyImage_ELF: didn't find any symbol tables");
+ belch("%s: didn't find any symbol tables", oc->fileName);
return 0;
}
ASSERT(symhash != NULL);
if (!strtab) {
- belch("ocGetNames_ELF: no strtab");
+ belch("%s: no strtab", oc->fileName);
return 0;
}
k = 0;
- oc->n_sections = ehdr->e_shnum;
- oc->sections = stgMallocBytes( oc->n_sections * sizeof(Section),
- "ocGetNames_ELF(oc->sections)" );
-
- for (i = 0; i < oc->n_sections; i++) {
+ for (i = 0; i < ehdr->e_shnum; i++) {
/* make a section entry for relevant sections */
SectionKind kind = SECTIONKIND_OTHER;
if (!strcmp(".data",sh_strtab+shdr[i].sh_name) ||
- !strcmp(".data1",sh_strtab+shdr[i].sh_name))
+ !strcmp(".data1",sh_strtab+shdr[i].sh_name) ||
+ !strcmp(".bss",sh_strtab+shdr[i].sh_name))
kind = SECTIONKIND_RWDATA;
if (!strcmp(".text",sh_strtab+shdr[i].sh_name) ||
!strcmp(".rodata",sh_strtab+shdr[i].sh_name) ||
!strcmp(".rodata1",sh_strtab+shdr[i].sh_name))
kind = SECTIONKIND_CODE_OR_RODATA;
+ if (!strcmp(".bss",sh_strtab+shdr[i].sh_name) && shdr[i].sh_size > 0) {
+ /* This is a non-empty .bss section. Allocate zeroed space for
+ it, and set its .sh_offset field such that
+ ehdrC + .sh_offset == addr_of_zeroed_space. */
+ char* zspace = stgCallocBytes(1, shdr[i].sh_size,
+ "ocGetNames_ELF(BSS)");
+ shdr[i].sh_offset = ((char*)zspace) - ((char*)ehdrC);
+ /*
+ fprintf(stderr, "BSS section at 0x%x, size %d\n",
+ zspace, shdr[i].sh_size);
+ */
+ }
+
/* fill in the section info */
- oc->sections[i].start = ehdrC + shdr[i].sh_offset;
- oc->sections[i].end = ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1;
- oc->sections[i].kind = kind;
-
+ addSection(oc, kind, ehdrC + shdr[i].sh_offset,
+ ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1);
+ if (kind != SECTIONKIND_OTHER && shdr[i].sh_size > 0)
+ addProddableBlock(oc, ehdrC + shdr[i].sh_offset, shdr[i].sh_size);
+
if (shdr[i].sh_type != SHT_SYMTAB) continue;
/* copy stuff into this module's object symbol table */
"ocGetNames_ELF(oc->symbols)");
for (j = 0; j < nent; j++) {
+
+ char isLocal = FALSE; /* avoids uninit-var warning */
+ char* ad = NULL;
+ char* nm = strtab + stab[j].st_name;
+ int secno = stab[j].st_shndx;
+
+ /* Figure out if we want to add it; if so, set ad to its
+ address. Otherwise leave ad == NULL. */
+
+ if (secno == SHN_COMMON) {
+ isLocal = FALSE;
+ ad = stgCallocBytes(1, stab[j].st_size, "ocGetNames_ELF(COMMON)");
+ /*
+ fprintf(stderr, "COMMON symbol, size %d name %s\n",
+ stab[j].st_size, nm);
+ */
+ /* Pointless to do addProddableBlock() for this area,
+ since the linker should never poke around in it. */
+ }
+ else
if ( ( ELF32_ST_BIND(stab[j].st_info)==STB_GLOBAL
|| ELF32_ST_BIND(stab[j].st_info)==STB_LOCAL
)
ELF32_ST_TYPE(stab[j].st_info)==STT_OBJECT ||
ELF32_ST_TYPE(stab[j].st_info)==STT_NOTYPE
)
- ) {
- char* nm = strtab + stab[j].st_name;
- char* ad = ehdrC
- + shdr[ stab[j].st_shndx ].sh_offset
- + stab[j].st_value;
- ASSERT(nm != NULL);
- ASSERT(ad != NULL);
- oc->symbols[j] = nm;
+ ) {
+ /* Section 0 is the undefined section, hence > and not >=. */
+ ASSERT(secno > 0 && secno < ehdr->e_shnum);
+ /*
+ if (shdr[secno].sh_type == SHT_NOBITS) {
+ fprintf(stderr, " BSS symbol, size %d off %d name %s\n",
+ stab[j].st_size, stab[j].st_value, nm);
+ }
+ */
+ ad = ehdrC + shdr[ secno ].sh_offset + stab[j].st_value;
if (ELF32_ST_BIND(stab[j].st_info)==STB_LOCAL) {
IF_DEBUG(linker,belch( "addOTabName(LOCL): %10p %s %s",
ad, oc->fileName, nm ));
- insertStrHashTable(oc->lochash, nm, ad);
+ isLocal = TRUE;
} else {
IF_DEBUG(linker,belch( "addOTabName(GLOB): %10p %s %s",
ad, oc->fileName, nm ));
- insertStrHashTable(symhash, nm, ad);
+ isLocal = FALSE;
}
}
- else {
+
+ /* And the decision is ... */
+
+ if (ad != NULL) {
+ ASSERT(nm != NULL);
+ oc->symbols[j] = nm;
+ /* Acquire! */
+ if (isLocal) {
+ ghciInsertStrHashTable(oc->fileName, oc->lochash, nm, ad);
+ } else {
+ ghciInsertStrHashTable(oc->fileName, symhash, nm, ad);
+ }
+ } else {
+ /* Skip. */
IF_DEBUG(linker,belch( "skipping `%s'",
strtab + stab[j].st_name ));
/*
*/
oc->symbols[j] = NULL;
}
+
}
}
/* Do ELF relocations which lack an explicit addend. All x86-linux
relocations appear to be of this form. */
-static int do_Elf32_Rel_relocations ( ObjectCode* oc, char* ehdrC,
- Elf32_Shdr* shdr, int shnum,
- Elf32_Sym* stab, char* strtab )
+static int
+do_Elf32_Rel_relocations ( ObjectCode* oc, char* ehdrC,
+ Elf32_Shdr* shdr, int shnum,
+ Elf32_Sym* stab, char* strtab )
{
int j;
char *symbol;
(void*)S = lookupSymbol( symbol );
}
if (!S) {
- barf("do_Elf32_Rel_relocations: %s: unknown symbol `%s'",
- oc->fileName, symbol);
+ belch("%s: unknown symbol `%s'", oc->fileName, symbol);
+ return 0;
}
IF_DEBUG(linker,belch( "`%s' resolves to %p", symbol, (void*)S ));
}
IF_DEBUG(linker,belch( "Reloc: P = %p S = %p A = %p",
(void*)P, (void*)S, (void*)A ));
+ checkProddableBlock ( oc, pP );
switch (ELF32_R_TYPE(info)) {
# ifdef i386_TARGET_ARCH
case R_386_32: *pP = S + A; break;
case R_386_PC32: *pP = S + A - P; break;
# endif
default:
- fprintf(stderr, "unhandled ELF relocation(Rel) type %d\n",
- ELF32_R_TYPE(info));
- barf("do_Elf32_Rel_relocations: unhandled ELF relocation type");
+ belch("%s: unhandled ELF relocation(Rel) type %d\n",
+ oc->fileName, ELF32_R_TYPE(info));
return 0;
}
/* Do ELF relocations for which explicit addends are supplied.
sparc-solaris relocations appear to be of this form. */
-static int do_Elf32_Rela_relocations ( ObjectCode* oc, char* ehdrC,
- Elf32_Shdr* shdr, int shnum,
- Elf32_Sym* stab, char* strtab )
+static int
+do_Elf32_Rela_relocations ( ObjectCode* oc, char* ehdrC,
+ Elf32_Shdr* shdr, int shnum,
+ Elf32_Sym* stab, char* strtab )
{
int j;
char *symbol;
Elf32_Addr offset = rtab[j].r_offset;
Elf32_Word info = rtab[j].r_info;
Elf32_Sword addend = rtab[j].r_addend;
-
Elf32_Addr P = ((Elf32_Addr)targ) + offset;
Elf32_Addr A = addend;
Elf32_Addr S;
(void*)S = lookupSymbol( symbol );
}
if (!S) {
- barf("do_Elf32_Rela_relocations: %s: unknown symbol `%s'",
- oc->fileName, symbol);
+ belch("%s: unknown symbol `%s'", oc->fileName, symbol);
+ return 0;
/*
S = 0x11223344;
fprintf ( stderr, "S %p A %p S+A %p S+A-P %p\n",S,A,S+A,S+A-P);
}
IF_DEBUG(linker,fprintf ( stderr, "Reloc: P = %p S = %p A = %p\n",
(void*)P, (void*)S, (void*)A ));
+ checkProddableBlock ( oc, (void*)P );
switch (ELF32_R_TYPE(info)) {
# if defined(sparc_TARGET_ARCH)
case R_SPARC_WDISP30:
w1 |= w2;
*pP = w1;
break;
+ /* According to the Sun documentation:
+ R_SPARC_UA32
+ This relocation type resembles R_SPARC_32, except it refers to an
+ unaligned word. That is, the word to be relocated must be treated
+ as four separate bytes with arbitrary alignment, not as a word
+ aligned according to the architecture requirements.
+
+ (JRS: which means that freeloading on the R_SPARC_32 case
+ is probably wrong, but hey ...)
+ */
+ case R_SPARC_UA32:
case R_SPARC_32:
w2 = (Elf32_Word)(S + A);
*pP = w2;
break;
# endif
default:
- fprintf(stderr, "unhandled ELF relocation(RelA) type %d\n",
- ELF32_R_TYPE(info));
- barf("do_Elf32_Rela_relocations: unhandled ELF relocation type");
+ belch("%s: unhandled ELF relocation(RelA) type %d\n",
+ oc->fileName, ELF32_R_TYPE(info));
return 0;
}
char* ehdrC = (char*)(oc->image);
Elf32_Ehdr* ehdr = (Elf32_Ehdr*) ehdrC;
Elf32_Shdr* shdr = (Elf32_Shdr*) (ehdrC + ehdr->e_shoff);
+ char* sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
/* first find "the" symbol table */
stab = (Elf32_Sym*) findElfSection ( ehdrC, SHT_SYMTAB );
strtab = findElfSection ( ehdrC, SHT_STRTAB );
if (stab == NULL || strtab == NULL) {
- belch("ocResolve_ELF: can't find string or symbol table");
+ belch("%s: can't find string or symbol table", oc->fileName);
return 0;
}
/* Process the relocation sections. */
for (shnum = 0; shnum < ehdr->e_shnum; shnum++) {
+
+ /* Skip sections called ".rel.stab". These appear to contain
+ relocation entries that, when done, make the stabs debugging
+ info point at the right places. We ain't interested in all
+ dat jazz, mun. */
+ if (0 == strcmp(".rel.stab", sh_strtab + shdr[shnum].sh_name))
+ continue;
+
if (shdr[shnum].sh_type == SHT_REL ) {
ok = do_Elf32_Rel_relocations ( oc, ehdrC, shdr,
shnum, stab, strtab );
shnum, stab, strtab );
if (!ok) return ok;
}
+
}
/* Free the local symbol table; we won't need it again. */