[Git][ghc/ghc][wip/romes/rts-linker-direct-symbol-lookup] fixup! rts: Make addDLL a wrapper around loadNativeObj
Rodrigo Mesquita (@alt-romes)
gitlab at gitlab.haskell.org
Tue Apr 2 12:34:55 UTC 2024
Rodrigo Mesquita pushed to branch wip/romes/rts-linker-direct-symbol-lookup at Glasgow Haskell Compiler / GHC
Commits:
4704c5ef by Rodrigo Mesquita at 2024-04-02T13:34:44+01:00
fixup! rts: Make addDLL a wrapper around loadNativeObj
- - - - -
4 changed files:
- rts/Linker.c
- rts/linker/LoadNativeObjPosix.c
- rts/linker/PEi386.c
- rts/linker/PEi386.h
Changes:
=====================================
rts/Linker.c
=====================================
@@ -643,7 +643,13 @@ void *lookupSymbolInNativeObj(void *handle, const char *symbol_name)
CHECK(symbol_name[0] == '_');
symbol_name = symbol_name+1;
#endif
+#if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
void *result = dlsym(handle, symbol_name);
+#elif defined(OBJFORMAT_PEi386)
+ void *result = lookupSymbolInDLL_PEi386(symbol_name, handle, NULL, NULL);
+#else
+ barf("lookupSymbolInNativeObj: Unsupported platform");
+#endif
RELEASE_LOCK(&linker_mutex);
return result;
@@ -652,7 +658,6 @@ void *lookupSymbolInNativeObj(void *handle, const char *symbol_name)
const char *addDLL(pathchar* dll_name)
{
-# if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
char *errmsg;
if (loadNativeObj(dll_name, &errmsg)) {
return NULL;
@@ -660,13 +665,6 @@ const char *addDLL(pathchar* dll_name)
ASSERT(errmsg != NULL);
return errmsg;
}
-
-# elif defined(OBJFORMAT_PEi386)
- return addDLL_PEi386(dll_name);
-
-# else
- barf("addDLL: not implemented on this platform");
-# endif
}
/* -----------------------------------------------------------------------------
@@ -1861,12 +1859,18 @@ addSection (Section *s, SectionKind kind, SectionAlloc alloc,
#define UNUSED(x) (void)(x)
-#if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
void * loadNativeObj (pathchar *path, char **errmsg)
{
IF_DEBUG(linker, debugBelch("loadNativeObj: path = '%s'\n", path));
ACQUIRE_LOCK(&linker_mutex);
+
+#if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
void *r = loadNativeObj_POSIX(path, errmsg);
+#elif defined(OBJFORMAT_PEi386)
+ void *r = addDLL_PEi386(path, NULL);
+#else
+ barf("loadNativeObj: not implemented on this platform");
+#endif
#if defined(OBJFORMAT_ELF)
if (!r) {
@@ -1879,15 +1883,6 @@ void * loadNativeObj (pathchar *path, char **errmsg)
RELEASE_LOCK(&linker_mutex);
return r;
}
-#else
-void * STG_NORETURN
-loadNativeObj (pathchar *path, char **errmsg)
-{
- UNUSED(path);
- UNUSED(errmsg);
- barf("loadNativeObj: not implemented on this platform");
-}
-#endif
static HsInt unloadNativeObj_(void *handle)
{
=====================================
rts/linker/LoadNativeObjPosix.c
=====================================
@@ -1,7 +1,10 @@
-#include "CheckUnload.h"
-#include "ForeignExports.h"
#include "LinkerInternals.h"
#include "Rts.h"
+
+#if defined(OBJFORMAT_ELF) || defined(OBJFORMAT_MACHO)
+
+#include "CheckUnload.h"
+#include "ForeignExports.h"
#include "RtsUtils.h"
#include "Profiling.h"
@@ -208,4 +211,4 @@ success:
return retval;
}
-
+#endif /* elf + macho */
=====================================
rts/linker/PEi386.c
=====================================
@@ -1141,47 +1141,55 @@ SymbolAddr*
lookupSymbolInDLLs ( const SymbolName* lbl, ObjectCode *dependent )
{
OpenedDLL* o_dll;
- SymbolAddr* sym;
- for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next) {
- /* debugBelch("look in %ls for %s\n", o_dll->name, lbl); */
+ for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next)
+ lookupSymbolInDLL_PEi386(lbl, o_dll->instance, o_dll->name, dependent);
+ return NULL;
+}
- sym = GetProcAddress(o_dll->instance, lbl+STRIP_LEADING_UNDERSCORE);
- if (sym != NULL) {
- /*debugBelch("found %s in %s\n", lbl+1,o_dll->name);*/
- return sym;
- }
+SymbolAddr*
+lookupSymbolInDLL_PEi386 ( const SymbolName* lbl, HINSTANCE instance, pathchar* dll_name, ObjectCode *dependent)
+{
+ SymbolAddr* sym;
- // TODO: Drop this
- /* Ticket #2283.
- Long description: http://support.microsoft.com/kb/132044
- tl;dr:
- If C/C++ compiler sees __declspec(dllimport) ... foo ...
- it generates call *__imp_foo, and __imp_foo here has exactly
- the same semantics as in __imp_foo = GetProcAddress(..., "foo")
- */
- if (sym == NULL && strncmp (lbl, "__imp_", 6) == 0) {
- sym = GetProcAddress(o_dll->instance,
- lbl + 6 + STRIP_LEADING_UNDERSCORE);
- if (sym != NULL) {
- SymbolAddr** indirect = m32_alloc(dependent->rw_m32, sizeof(SymbolAddr*), 8);
- if (indirect == NULL) {
- barf("lookupSymbolInDLLs: Failed to allocation indirection");
- }
- *indirect = sym;
- IF_DEBUG(linker,
- debugBelch("warning: %s from %S is linked instead of %s\n",
- lbl+6+STRIP_LEADING_UNDERSCORE, o_dll->name, lbl));
- return (void*) indirect;
- }
- }
+ /* debugBelch("look in %ls for %s\n", dll_name, lbl); */
- sym = GetProcAddress(o_dll->instance, lbl);
+ sym = GetProcAddress(instance, lbl+STRIP_LEADING_UNDERSCORE);
+ if (sym != NULL) {
+ /*debugBelch("found %s in %s\n", lbl+1,dll_name);*/
+ return sym;
+ }
+
+ // TODO: Drop this
+ /* Ticket #2283.
+ Long description: http://support.microsoft.com/kb/132044
+ tl;dr:
+ If C/C++ compiler sees __declspec(dllimport) ... foo ...
+ it generates call *__imp_foo, and __imp_foo here has exactly
+ the same semantics as in __imp_foo = GetProcAddress(..., "foo")
+ */
+ if (sym == NULL && strncmp (lbl, "__imp_", 6) == 0) {
+ sym = GetProcAddress(instance,
+ lbl + 6 + STRIP_LEADING_UNDERSCORE);
if (sym != NULL) {
- /*debugBelch("found %s in %s\n", lbl,o_dll->name);*/
- return sym;
+ SymbolAddr** indirect = m32_alloc(dependent->rw_m32, sizeof(SymbolAddr*), 8);
+ if (indirect == NULL) {
+ barf("lookupSymbolInDLLs: Failed to allocation indirection");
+ }
+ *indirect = sym;
+ IF_DEBUG(linker,
+ debugBelch("warning: %s from %S is linked instead of %s\n",
+ lbl+6+STRIP_LEADING_UNDERSCORE, dll_name, lbl));
+ return (void*) indirect;
}
}
+
+ sym = GetProcAddress(instance, lbl);
+ if (sym != NULL) {
+ /*debugBelch("found %s in %s\n", lbl,dll_name);*/
+ return sym;
+ }
+
return NULL;
}
=====================================
rts/linker/PEi386.h
=====================================
@@ -60,6 +60,7 @@ bool ocRunFini_PEi386 ( ObjectCode *oc );
bool ocGetNames_PEi386 ( ObjectCode* oc );
bool ocVerifyImage_PEi386 ( ObjectCode* oc );
SymbolAddr *lookupSymbol_PEi386(SymbolName *lbl, ObjectCode *dependent, SymType *type);
+SymbolAddr *lookupSymbolInDLL_PEi386 (const SymbolName* lbl, HINSTANCE instance, pathchar* dll_name, ObjectCode *dependent);
/* See Note [mingw-w64 name decoration scheme] */
/* We use myindex to calculate array addresses, rather than
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/4704c5ef2f416ff36d91c9b3387f3cdf94441ecd
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/4704c5ef2f416ff36d91c9b3387f3cdf94441ecd
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