diff options
Diffstat (limited to 'ld/pe-dll.c')
| -rw-r--r-- | ld/pe-dll.c | 143 |
1 files changed, 135 insertions, 8 deletions
diff --git a/ld/pe-dll.c b/ld/pe-dll.c index af0cd51..d9e4078 100644 --- a/ld/pe-dll.c +++ b/ld/pe-dll.c @@ -141,6 +141,7 @@ static bfd *filler_bfd; static struct sec *edata_s, *reloc_s; static unsigned char *edata_d, *reloc_d; static size_t edata_sz, reloc_sz; +static int runtime_pseudo_relocs_created = 0; typedef struct { @@ -305,6 +306,10 @@ static bfd *make_singleton_name_thunk PARAMS ((const char *, bfd *)); static char *make_import_fixup_mark PARAMS ((arelent *)); static bfd *make_import_fixup_entry PARAMS ((const char *, const char *, const char *, bfd *)); +static bfd *make_runtime_pseudo_reloc + PARAMS ((const char *, const char *, int, bfd *)); +static bfd *pe_create_runtime_relocator_reference + PARAMS ((bfd *)); static unsigned int pe_get16 PARAMS ((bfd *, int)); static unsigned int pe_get32 PARAMS ((bfd *, int)); static unsigned int pe_as32 PARAMS ((void *)); @@ -2094,15 +2099,112 @@ make_import_fixup_entry (name, fixup_name, dll_symname, parent) return abfd; } +/* .section .rdata_runtime_pseudo_reloc + .long addend + .rva __fuNN_SYM (pointer to reference (address) in text) */ + +static bfd * +make_runtime_pseudo_reloc (name, fixup_name, addend, parent) + const char *name ATTRIBUTE_UNUSED; + const char *fixup_name; + int addend; + bfd *parent; +{ + asection *rt_rel; + unsigned char *rt_rel_d; + char *oname; + bfd *abfd; + + oname = (char *) xmalloc (20); + sprintf (oname, "rtr%06d.o", tmp_seq); + tmp_seq++; + + abfd = bfd_create (oname, parent); + bfd_find_target (pe_details->object_target, abfd); + bfd_make_writable (abfd); + + bfd_set_format (abfd, bfd_object); + bfd_set_arch_mach (abfd, pe_details->bfd_arch, 0); + + symptr = 0; + symtab = (asymbol **) xmalloc (2 * sizeof (asymbol *)); + rt_rel = quick_section (abfd, ".rdata_runtime_pseudo_reloc", SEC_HAS_CONTENTS, 2); + + quick_symbol (abfd, "", fixup_name, "", UNDSEC, BSF_GLOBAL, 0); + + bfd_set_section_size (abfd, rt_rel, 8); + rt_rel_d = (unsigned char *) xmalloc (8); + rt_rel->contents = rt_rel_d; + memset (rt_rel_d, 0, 8); + bfd_put_32 (abfd, addend, rt_rel_d); + + quick_reloc (abfd, 4, BFD_RELOC_RVA, 1); + save_relocs (rt_rel); + + bfd_set_symtab (abfd, symtab, symptr); + + bfd_set_section_contents (abfd, rt_rel, rt_rel_d, 0, 8); + + bfd_make_readable (abfd); + return abfd; +} + +/* .section .rdata + .rva __pei386_runtime_relocator */ + +static bfd * +pe_create_runtime_relocator_reference (parent) + bfd *parent; +{ + asection *extern_rt_rel; + unsigned char *extern_rt_rel_d; + char *oname; + bfd *abfd; + + oname = (char *) xmalloc (20); + sprintf (oname, "ertr%06d.o", tmp_seq); + tmp_seq++; + + abfd = bfd_create (oname, parent); + bfd_find_target (pe_details->object_target, abfd); + bfd_make_writable (abfd); + + bfd_set_format (abfd, bfd_object); + bfd_set_arch_mach (abfd, pe_details->bfd_arch, 0); + + symptr = 0; + symtab = (asymbol **) xmalloc (2 * sizeof (asymbol *)); + extern_rt_rel = quick_section (abfd, ".rdata", SEC_HAS_CONTENTS, 2); + + quick_symbol (abfd, "", "__pei386_runtime_relocator", "", UNDSEC, BSF_NO_FLAGS, 0); + + bfd_set_section_size (abfd, extern_rt_rel, 4); + extern_rt_rel_d = (unsigned char *) xmalloc (4); + extern_rt_rel->contents = extern_rt_rel_d; + + quick_reloc (abfd, 0, BFD_RELOC_RVA, 1); + save_relocs (extern_rt_rel); + + bfd_set_symtab (abfd, symtab, symptr); + + bfd_set_section_contents (abfd, extern_rt_rel, extern_rt_rel_d, 0, 4); + + bfd_make_readable (abfd); + return abfd; +} + void -pe_create_import_fixup (rel) +pe_create_import_fixup (rel, s, addend) arelent *rel; + asection *s; + int addend; { char buf[300]; struct symbol_cache_entry *sym = *rel->sym_ptr_ptr; struct bfd_link_hash_entry *name_thunk_sym; const char *name = sym->name; char *fixup_name = make_import_fixup_mark (rel); + bfd *b; sprintf (buf, U ("_nm_thnk_%s"), name); @@ -2117,14 +2219,39 @@ pe_create_import_fixup (rel) config.text_read_only = false; } - { - extern char * pe_data_import_dll; - char * dll_symname = pe_data_import_dll ? pe_data_import_dll : "unknown"; + if (addend == 0 || link_info.pei386_runtime_pseudo_reloc) + { + extern char * pe_data_import_dll; + char * dll_symname = pe_data_import_dll ? pe_data_import_dll : "unknown"; - bfd *b = make_import_fixup_entry (name, fixup_name, dll_symname, - output_bfd); - add_bfd_to_link (b, b->filename, &link_info); - } + b = make_import_fixup_entry (name, fixup_name, dll_symname, output_bfd); + add_bfd_to_link (b, b->filename, &link_info); + } + + if (addend != 0) + { + if (link_info.pei386_runtime_pseudo_reloc) + { + if (pe_dll_extra_pe_debug) + printf ("creating runtime pseudo-reloc entry for %s (addend=%d)\n", + fixup_name, addend); + b = make_runtime_pseudo_reloc (name, fixup_name, addend, output_bfd); + add_bfd_to_link (b, b->filename, &link_info); + + if (runtime_pseudo_relocs_created == 0) + { + b = pe_create_runtime_relocator_reference (output_bfd); + add_bfd_to_link (b, b->filename, &link_info); + } + runtime_pseudo_relocs_created++; + } + else + { + einfo (_("%C: variable '%T' can't be auto-imported. Please read the documentation for ld's --enable-auto-import for details.\n"), + s->owner, s, rel->address, sym->name); + einfo ("%X"); + } + } } |