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authorCharles Wilson <cygwin@cwilson.fastmail.fm>2001-08-02 23:03:10 +0000
committerCharles Wilson <cygwin@cwilson.fastmail.fm>2001-08-02 23:03:10 +0000
commitdecc3638003f7c461b0870e45aa8f179ea501208 (patch)
tree4365777afeca62438db3a04c6a74751e7df36f39 /ld
parenta5cedf2f04b49e3d7490bd33142b2b524214dd6f (diff)
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2001-08-02 Charles Wilson <cwilson@ece.gatech.edu>
* ldmain.c (main): initialize link_info.pei386_auto_import * pe-dll.c: new tables for auto-export filtering (auto_export): change API, pass abfd for contextual filtering. Loop thru tables of excluded symbols instead of comparing "by hand". 2001-08-02 Paul Sokolovsky <paul.sokolovsky@technologist.com> * pe-dll.c: new variable pe_dll_enable_extra_debug. New static variable current_sec (static struct sec *). Add forward declaration for add_bfd_to_link. (process_def_file): Don't export undefined symbols. Do not export symbols starting with "_imp__". Call auto_export() with new API. (pe_walk_relocs_of_symbol): New function. (generate_reloc): add optional extra debugging (pe_dll_generate_def_file): eliminate extraneous initial blank line in output (make_one): enlarge symtab to make room for __nm__ symbols (DATA auto-import support). (make_singleton_name_thunk): New function. (make_import_fixup_mark): New function. (make_import_fixup_entry): New function. (pe_create_import_fixup): New function. (add_bfd_to_link): Specify that 'name' argument is a CONST char *. * pe-dll.h: declare new variable pe_dll_extra_pe_debug; declare new functions pe_walk_relocs_of_symbol and pe_create_import_fixup. * emultempl/pe.em: add new options --enable-auto-import, --disable-auto-import, and --enable-extra-pe-debug. (make_import_fixup): New function. (pe_find_data_imports): New function. (pr_sym): New function. (gld_${EMULATION_NAME}_after_open): Add optional extra pe debugging. Call pe_find_data_imports. Mark .idata as DATA, not CODE. 2001-08-02 Charles Wilson <cwilson@ece.gatech.edu> * ld.texinfo: add additional documentation for --export-all-symbols. Document --out-implib, --enable-auto-image-base, --disable-auto-image-base, --dll-search-prefix, --enable-auto-import, and --disable-auto-import. * ldint.texinfo: Add detailed documentation on auto-import implementation.
Diffstat (limited to 'ld')
-rw-r--r--ld/emultempl/pe.em161
1 files changed, 156 insertions, 5 deletions
diff --git a/ld/emultempl/pe.em b/ld/emultempl/pe.em
index 1df0609..fe1a757 100644
--- a/ld/emultempl/pe.em
+++ b/ld/emultempl/pe.em
@@ -146,7 +146,9 @@ gld_${EMULATION_NAME}_before_parse()
ldfile_output_architecture = bfd_arch_${ARCH};
output_filename = "${EXECUTABLE_NAME:-a.exe}";
#ifdef DLL_SUPPORT
+ config.dynamic_link = true;
config.has_shared = 1;
+/* link_info.pei386_auto_import = true; */
#if (PE_DEF_SUBSYSTEM == 9) || (PE_DEF_SUBSYSTEM == 2)
#if defined TARGET_IS_mipspe || defined TARGET_IS_armpe
@@ -191,6 +193,9 @@ gld_${EMULATION_NAME}_before_parse()
#define OPTION_DISABLE_AUTO_IMAGE_BASE (OPTION_ENABLE_AUTO_IMAGE_BASE + 1)
#define OPTION_DLL_SEARCH_PREFIX (OPTION_DISABLE_AUTO_IMAGE_BASE + 1)
#define OPTION_NO_DEFAULT_EXCLUDES (OPTION_DLL_SEARCH_PREFIX + 1)
+#define OPTION_DLL_ENABLE_AUTO_IMPORT (OPTION_NO_DEFAULT_EXCLUDES + 1)
+#define OPTION_DLL_DISABLE_AUTO_IMPORT (OPTION_DLL_ENABLE_AUTO_IMPORT + 1)
+#define OPTION_ENABLE_EXTRA_PE_DEBUG (OPTION_DLL_DISABLE_AUTO_IMPORT + 1)
static struct option longopts[] = {
/* PE options */
@@ -228,6 +233,9 @@ static struct option longopts[] = {
{"disable-auto-image-base", no_argument, NULL, OPTION_DISABLE_AUTO_IMAGE_BASE},
{"dll-search-prefix", required_argument, NULL, OPTION_DLL_SEARCH_PREFIX},
{"no-default-excludes", no_argument, NULL, OPTION_NO_DEFAULT_EXCLUDES},
+ {"enable-auto-import", no_argument, NULL, OPTION_DLL_ENABLE_AUTO_IMPORT},
+ {"disable-auto-import", no_argument, NULL, OPTION_DLL_DISABLE_AUTO_IMPORT},
+ {"enable-extra-pe-debug", no_argument, NULL, OPTION_ENABLE_EXTRA_PE_DEBUG},
#endif
{NULL, no_argument, NULL, 0}
};
@@ -313,6 +321,11 @@ gld_${EMULATION_NAME}_list_options (file)
fprintf (file, _(" --dll-search-prefix=<string> When linking dynamically to a dll witout an\n"));
fprintf (file, _(" importlib, use <string><basename>.dll \n"));
fprintf (file, _(" in preference to lib<basename>.dll \n"));
+ fprintf (file, _(" --enable-auto-import Do sophistcated linking of _sym to \n"));
+ fprintf (file, _(" __imp_sym for DATA references\n"));
+ fprintf (file, _(" --disable-auto-import Do not auto-import DATA items from DLLs\n"));
+ fprintf (file, _(" --enable-extra-pe-debug Enable verbose debug output when building\n"));
+ fprintf (file, _(" or linking to DLLs (esp. auto-import)\n"));
#endif
}
@@ -583,6 +596,15 @@ gld_${EMULATION_NAME}_parse_args(argc, argv)
case OPTION_NO_DEFAULT_EXCLUDES:
pe_dll_do_default_excludes = 0;
break;
+ case OPTION_DLL_ENABLE_AUTO_IMPORT:
+ link_info.pei386_auto_import = true;
+ break;
+ case OPTION_DLL_DISABLE_AUTO_IMPORT:
+ link_info.pei386_auto_import = false;
+ break;
+ case OPTION_ENABLE_EXTRA_PE_DEBUG:
+ pe_dll_extra_pe_debug = 1;
+ break;
#endif
}
return 1;
@@ -716,14 +738,15 @@ pe_undef_cdecl_match (h, string)
struct bfd_link_hash_entry *h;
PTR string;
{
- int sl = strlen (string);
+ int sl;
+ sl = strlen (string); /* silence compiler warning */
if (h->type == bfd_link_hash_defined
&& strncmp (h->root.string, string, sl) == 0
&& h->root.string[sl] == '@')
- {
- pe_undef_found_sym = h;
- return false;
- }
+ {
+ pe_undef_found_sym = h;
+ return false;
+ }
return true;
}
@@ -733,6 +756,11 @@ pe_fixup_stdcalls ()
static int gave_warning_message = 0;
struct bfd_link_hash_entry *undef, *sym;
char *at;
+ if (pe_dll_extra_pe_debug)
+ {
+ printf ("%s\n", __FUNCTION__);
+ }
+
for (undef = link_info.hash->undefs; undef; undef=undef->next)
if (undef->type == bfd_link_hash_undefined)
{
@@ -791,11 +819,122 @@ pe_fixup_stdcalls ()
}
}
}
+
+static int
+make_import_fixup (rel)
+ arelent *rel;
+{
+ struct symbol_cache_entry *sym = *rel->sym_ptr_ptr;
+/*
+ bfd *b;
+*/
+
+ if (pe_dll_extra_pe_debug)
+ {
+ printf ("arelent: %s@%#x: add=%li\n", sym->name,
+ (int) rel->address, rel->addend);
+ }
+ pe_create_import_fixup (rel);
+ return 1;
+}
+
+char *pe_data_import_dll;
+
+static void
+pe_find_data_imports ()
+{
+ struct bfd_link_hash_entry *undef, *sym;
+ for (undef = link_info.hash->undefs; undef; undef=undef->next)
+ {
+ if (undef->type == bfd_link_hash_undefined)
+ {
+ /* C++ symbols are *long* */
+ char buf[4096];
+ if (pe_dll_extra_pe_debug)
+ {
+ printf ("%s:%s\n", __FUNCTION__, undef->root.string);
+ }
+ sprintf (buf, "__imp_%s", undef->root.string);
+
+ sym = bfd_link_hash_lookup (link_info.hash, buf, 0, 0, 1);
+ if (sym && sym->type == bfd_link_hash_defined)
+ {
+ einfo (_("Warning: resolving %s by linking to %s (auto-import)\n"),
+ undef->root.string, buf);
+ {
+ bfd *b = sym->u.def.section->owner;
+ asymbol **symbols;
+ int nsyms, symsize, i;
+
+ symsize = bfd_get_symtab_upper_bound (b);
+ symbols = (asymbol **) xmalloc (symsize);
+ nsyms = bfd_canonicalize_symtab (b, symbols);
+
+ for (i = 0; i < nsyms; i++)
+ {
+ if (memcmp(symbols[i]->name, "__head_",
+ sizeof ("__head_") - 1))
+ continue;
+ if (pe_dll_extra_pe_debug)
+ {
+ printf ("->%s\n", symbols[i]->name);
+ }
+ pe_data_import_dll = (char*) (symbols[i]->name +
+ sizeof ("__head_") - 1);
+ break;
+ }
+ }
+
+ pe_walk_relocs_of_symbol (&link_info, undef->root.string,
+ make_import_fixup);
+
+ /* let's differentiate it somehow from defined */
+ undef->type = bfd_link_hash_defweak;
+ /* we replace original name with __imp_ prefixed, this
+ 1) may trash memory 2) leads to duplicate symbol generation.
+ Still, IMHO it's better than having name poluted. */
+ undef->root.string = sym->root.string;
+ undef->u.def.value = sym->u.def.value;
+ undef->u.def.section = sym->u.def.section;
+ }
+ }
+ }
+}
#endif /* DLL_SUPPORT */
+static boolean
+pr_sym (h, string)
+ struct bfd_hash_entry *h;
+ PTR string;
+{
+ if (pe_dll_extra_pe_debug)
+ {
+ printf("+%s\n",h->string);
+ }
+ return true;
+}
+
+
static void
gld_${EMULATION_NAME}_after_open ()
{
+
+ if (pe_dll_extra_pe_debug)
+ {
+ bfd *a;
+ struct bfd_link_hash_entry *sym;
+ printf ("%s()\n", __FUNCTION__);
+
+ for (sym = link_info.hash->undefs; sym; sym=sym->next)
+ printf ("-%s\n", sym->root.string);
+ bfd_hash_traverse (&link_info.hash->table, pr_sym,NULL);
+
+ for (a = link_info.input_bfds; a; a = a->link_next)
+ {
+ printf("*%s\n",a->filename);
+ }
+ }
+
/* Pass the wacky PE command line options into the output bfd.
FIXME: This should be done via a function, rather than by
including an internal BFD header. */
@@ -810,6 +949,8 @@ gld_${EMULATION_NAME}_after_open ()
if (pe_enable_stdcall_fixup) /* -1=warn or 1=disable */
pe_fixup_stdcalls ();
+ pe_find_data_imports (output_bfd, &link_info);
+
pe_process_import_defs(output_bfd, &link_info);
if (link_info.shared)
pe_dll_build_sections (output_bfd, &link_info);
@@ -1251,6 +1392,16 @@ gld_${EMULATION_NAME}_finish ()
if (pe_out_def_filename)
pe_dll_generate_def_file (pe_out_def_filename);
#endif /* DLL_SUPPORT */
+
+ /* I don't know where .idata gets set as code, but it shouldn't be */
+ {
+ asection *asec = bfd_get_section_by_name (output_bfd, ".idata");
+ if (asec)
+ {
+ asec->flags &= ~SEC_CODE;
+ asec->flags |= SEC_DATA;
+ }
+ }
}