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Diffstat (limited to 'contrib/binutils/ld/pe-dll.c')
| -rw-r--r-- | contrib/binutils/ld/pe-dll.c | 2697 |
1 files changed, 0 insertions, 2697 deletions
diff --git a/contrib/binutils/ld/pe-dll.c b/contrib/binutils/ld/pe-dll.c deleted file mode 100644 index 45d00ae..0000000 --- a/contrib/binutils/ld/pe-dll.c +++ /dev/null @@ -1,2697 +0,0 @@ -/* Routines to help build PEI-format DLLs (Win32 etc) - Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004 - Free Software Foundation, Inc. - Written by DJ Delorie <dj@cygnus.com> - - This file is part of GLD, the Gnu Linker. - - GLD is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) - any later version. - - GLD is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with GLD; see the file COPYING. If not, write to the Free - Software Foundation, 59 Temple Place - Suite 330, Boston, MA - 02111-1307, USA. */ - -#include "bfd.h" -#include "sysdep.h" -#include "bfdlink.h" -#include "libiberty.h" -#include "safe-ctype.h" - -#include <time.h> - -#include "ld.h" -#include "ldexp.h" -#include "ldlang.h" -#include "ldwrite.h" -#include "ldmisc.h" -#include <ldgram.h> -#include "ldmain.h" -#include "ldfile.h" -#include "ldemul.h" -#include "coff/internal.h" -#include "../bfd/libcoff.h" -#include "deffile.h" -#include "pe-dll.h" - -/* This file turns a regular Windows PE image into a DLL. Because of - the complexity of this operation, it has been broken down into a - number of separate modules which are all called by the main function - at the end of this file. This function is not re-entrant and is - normally only called once, so static variables are used to reduce - the number of parameters and return values required. - - See also: ld/emultempl/pe.em. */ - -/* Auto-import feature by Paul Sokolovsky - - Quick facts: - - 1. With this feature on, DLL clients can import variables from DLL - without any concern from their side (for example, without any source - code modifications). - - 2. This is done completely in bounds of the PE specification (to be fair, - there's a place where it pokes nose out of, but in practice it works). - So, resulting module can be used with any other PE compiler/linker. - - 3. Auto-import is fully compatible with standard import method and they - can be mixed together. - - 4. Overheads: space: 8 bytes per imported symbol, plus 20 for each - reference to it; load time: negligible; virtual/physical memory: should be - less than effect of DLL relocation, and I sincerely hope it doesn't affect - DLL sharability (too much). - - Idea - - The obvious and only way to get rid of dllimport insanity is to make client - access variable directly in the DLL, bypassing extra dereference. I.e., - whenever client contains something like - - mov dll_var,%eax, - - address of dll_var in the command should be relocated to point into loaded - DLL. The aim is to make OS loader do so, and than make ld help with that. - Import section of PE made following way: there's a vector of structures - each describing imports from particular DLL. Each such structure points - to two other parallel vectors: one holding imported names, and one which - will hold address of corresponding imported name. So, the solution is - de-vectorize these structures, making import locations be sparse and - pointing directly into code. Before continuing, it is worth a note that, - while authors strives to make PE act ELF-like, there're some other people - make ELF act PE-like: elfvector, ;-) . - - Implementation - - For each reference of data symbol to be imported from DLL (to set of which - belong symbols with name <sym>, if __imp_<sym> is found in implib), the - import fixup entry is generated. That entry is of type - IMAGE_IMPORT_DESCRIPTOR and stored in .idata$3 subsection. Each - fixup entry contains pointer to symbol's address within .text section - (marked with __fuN_<sym> symbol, where N is integer), pointer to DLL name - (so, DLL name is referenced by multiple entries), and pointer to symbol - name thunk. Symbol name thunk is singleton vector (__nm_th_<symbol>) - pointing to IMAGE_IMPORT_BY_NAME structure (__nm_<symbol>) directly - containing imported name. Here comes that "om the edge" problem mentioned - above: PE specification rambles that name vector (OriginalFirstThunk) - should run in parallel with addresses vector (FirstThunk), i.e. that they - should have same number of elements and terminated with zero. We violate - this, since FirstThunk points directly into machine code. But in practice, - OS loader implemented the sane way: it goes thru OriginalFirstThunk and - puts addresses to FirstThunk, not something else. It once again should be - noted that dll and symbol name structures are reused across fixup entries - and should be there anyway to support standard import stuff, so sustained - overhead is 20 bytes per reference. Other question is whether having several - IMAGE_IMPORT_DESCRIPTORS for the same DLL is possible. Answer is yes, it is - done even by native compiler/linker (libth32's functions are in fact reside - in windows9x kernel32.dll, so if you use it, you have two - IMAGE_IMPORT_DESCRIPTORS for kernel32.dll). Yet other question is whether - referencing the same PE structures several times is valid. The answer is why - not, prohibiting that (detecting violation) would require more work on - behalf of loader than not doing it. - - See also: ld/emultempl/pe.em. */ - -static void add_bfd_to_link (bfd *, const char *, struct bfd_link_info *); - -/* For emultempl/pe.em. */ - -def_file * pe_def_file = 0; -int pe_dll_export_everything = 0; -int pe_dll_do_default_excludes = 1; -int pe_dll_kill_ats = 0; -int pe_dll_stdcall_aliases = 0; -int pe_dll_warn_dup_exports = 0; -int pe_dll_compat_implib = 0; -int pe_dll_extra_pe_debug = 0; - -/* Static variables and types. */ - -static bfd_vma image_base; -static bfd *filler_bfd; -static struct bfd_section *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 - { - char *target_name; - char *object_target; - unsigned int imagebase_reloc; - int pe_arch; - int bfd_arch; - int underscored; - } -pe_details_type; - -typedef struct - { - char *name; - int len; - } -autofilter_entry_type; - -#define PE_ARCH_i386 1 -#define PE_ARCH_sh 2 -#define PE_ARCH_mips 3 -#define PE_ARCH_arm 4 -#define PE_ARCH_arm_epoc 5 - -static pe_details_type pe_detail_list[] = -{ - { - "pei-i386", - "pe-i386", - 7 /* R_IMAGEBASE */, - PE_ARCH_i386, - bfd_arch_i386, - 1 - }, - { - "pei-shl", - "pe-shl", - 16 /* R_SH_IMAGEBASE */, - PE_ARCH_sh, - bfd_arch_sh, - 1 - }, - { - "pei-mips", - "pe-mips", - 34 /* MIPS_R_RVA */, - PE_ARCH_mips, - bfd_arch_mips, - 0 - }, - { - "pei-arm-little", - "pe-arm-little", - 11 /* ARM_RVA32 */, - PE_ARCH_arm, - bfd_arch_arm, - 1 - }, - { - "epoc-pei-arm-little", - "epoc-pe-arm-little", - 11 /* ARM_RVA32 */, - PE_ARCH_arm_epoc, - bfd_arch_arm, - 0 - }, - { NULL, NULL, 0, 0, 0, 0 } -}; - -static pe_details_type *pe_details; - -static autofilter_entry_type autofilter_symbollist[] = -{ - { "DllMain@12", 10 }, - { "DllEntryPoint@0", 15 }, - { "DllMainCRTStartup@12", 20 }, - { "_cygwin_dll_entry@12", 20 }, - { "_cygwin_crt0_common@8", 21 }, - { "_cygwin_noncygwin_dll_entry@12", 30 }, - { "impure_ptr", 10 }, - { "_pei386_runtime_relocator", 25 }, - { "do_pseudo_reloc", 15 }, - { "cygwin_crt0", 11 }, - { NULL, 0 } -}; - -/* Do not specify library suffix explicitly, to allow for dllized versions. */ -static autofilter_entry_type autofilter_liblist[] = -{ - { "libcygwin", 9 }, - { "libgcc", 6 }, - { "libstdc++", 9 }, - { "libmingw32", 10 }, - { "libmingwex", 10 }, - { "libg2c", 6 }, - { "libsupc++", 9 }, - { "libobjc", 7 }, - { "libgcj", 6 }, - { NULL, 0 } -}; - -static autofilter_entry_type autofilter_objlist[] = -{ - { "crt0.o", 6 }, - { "crt1.o", 6 }, - { "crt2.o", 6 }, - { "dllcrt1.o", 9 }, - { "dllcrt2.o", 9 }, - { "gcrt0.o", 7 }, - { "gcrt1.o", 7 }, - { "gcrt2.o", 7 }, - { "crtbegin.o", 10 }, - { "crtend.o", 8 }, - { NULL, 0 } -}; - -static autofilter_entry_type autofilter_symbolprefixlist[] = -{ - /* { "__imp_", 6 }, */ - /* Do __imp_ explicitly to save time. */ - { "__rtti_", 7 }, - /* Don't re-export auto-imported symbols. */ - { "_nm_", 4 }, - { "__builtin_", 10 }, - /* Don't export symbols specifying internal DLL layout. */ - { "_head_", 6 }, - { "_fmode", 6 }, - { "_impure_ptr", 11 }, - { "cygwin_attach_dll", 17 }, - { "cygwin_premain0", 15 }, - { "cygwin_premain1", 15 }, - { "cygwin_premain2", 15 }, - { "cygwin_premain3", 15 }, - { "environ", 7 }, - { NULL, 0 } -}; - -static autofilter_entry_type autofilter_symbolsuffixlist[] = -{ - { "_iname", 6 }, - { NULL, 0 } -}; - -#define U(str) (pe_details->underscored ? "_" str : str) - -void -pe_dll_id_target (const char *target) -{ - int i; - - for (i = 0; pe_detail_list[i].target_name; i++) - if (strcmp (pe_detail_list[i].target_name, target) == 0 - || strcmp (pe_detail_list[i].object_target, target) == 0) - { - pe_details = pe_detail_list + i; - return; - } - einfo (_("%XUnsupported PEI architecture: %s\n"), target); - exit (1); -} - -/* Helper functions for qsort. Relocs must be sorted so that we can write - them out by pages. */ - -typedef struct - { - bfd_vma vma; - char type; - short extra; - } -reloc_data_type; - -static int -reloc_sort (const void *va, const void *vb) -{ - bfd_vma a = ((const reloc_data_type *) va)->vma; - bfd_vma b = ((const reloc_data_type *) vb)->vma; - - return (a > b) ? 1 : ((a < b) ? -1 : 0); -} - -static int -pe_export_sort (const void *va, const void *vb) -{ - const def_file_export *a = va; - const def_file_export *b = vb; - - return strcmp (a->name, b->name); -} - -/* Read and process the .DEF file. */ - -/* These correspond to the entries in pe_def_file->exports[]. I use - exported_symbol_sections[i] to tag whether or not the symbol was - defined, since we can't export symbols we don't have. */ - -static bfd_vma *exported_symbol_offsets; -static struct bfd_section **exported_symbol_sections; -static int export_table_size; -static int count_exported; -static int count_exported_byname; -static int count_with_ordinals; -static const char *dll_name; -static int min_ordinal, max_ordinal; -static int *exported_symbols; - -typedef struct exclude_list_struct - { - char *string; - struct exclude_list_struct *next; - int type; - } -exclude_list_struct; - -static struct exclude_list_struct *excludes = 0; - -void -pe_dll_add_excludes (const char *new_excludes, const int type) -{ - char *local_copy; - char *exclude_string; - - local_copy = xstrdup (new_excludes); - - exclude_string = strtok (local_copy, ",:"); - for (; exclude_string; exclude_string = strtok (NULL, ",:")) - { - struct exclude_list_struct *new_exclude; - - new_exclude = xmalloc (sizeof (struct exclude_list_struct)); - new_exclude->string = xmalloc (strlen (exclude_string) + 1); - strcpy (new_exclude->string, exclude_string); - new_exclude->type = type; - new_exclude->next = excludes; - excludes = new_exclude; - } - - free (local_copy); -} - - -/* abfd is a bfd containing n (or NULL) - It can be used for contextual checks. */ - -static int -auto_export (bfd *abfd, def_file *d, const char *n) -{ - int i; - struct exclude_list_struct *ex; - autofilter_entry_type *afptr; - const char * libname = 0; - if (abfd && abfd->my_archive) - libname = lbasename (abfd->my_archive->filename); - - /* We should not re-export imported stuff. */ - if (strncmp (n, "_imp__", 6) == 0) - return 0; - - for (i = 0; i < d->num_exports; i++) - if (strcmp (d->exports[i].name, n) == 0) - return 0; - - if (pe_dll_do_default_excludes) - { - const char * p; - int len; - - if (pe_dll_extra_pe_debug) - printf ("considering exporting: %s, abfd=%p, abfd->my_arc=%p\n", - n, abfd, abfd->my_archive); - - /* First of all, make context checks: - Don't export anything from standard libs. */ - if (libname) - { - afptr = autofilter_liblist; - - while (afptr->name) - { - if (strncmp (libname, afptr->name, afptr->len) == 0 ) - return 0; - afptr++; - } - } - - /* Next, exclude symbols from certain startup objects. */ - - if (abfd && (p = lbasename (abfd->filename))) - { - afptr = autofilter_objlist; - while (afptr->name) - { - if (strcmp (p, afptr->name) == 0) - return 0; - afptr++; - } - } - - /* Don't try to blindly exclude all symbols - that begin with '__'; this was tried and - it is too restrictive. */ - - /* Then, exclude specific symbols. */ - afptr = autofilter_symbollist; - while (afptr->name) - { - if (strcmp (n, afptr->name) == 0) - return 0; - - afptr++; - } - - /* Next, exclude symbols starting with ... */ - afptr = autofilter_symbolprefixlist; - while (afptr->name) - { - if (strncmp (n, afptr->name, afptr->len) == 0) - return 0; - - afptr++; - } - - /* Finally, exclude symbols ending with ... */ - len = strlen (n); - afptr = autofilter_symbolsuffixlist; - while (afptr->name) - { - if ((len >= afptr->len) - /* Add 1 to insure match with trailing '\0'. */ - && strncmp (n + len - afptr->len, afptr->name, - afptr->len + 1) == 0) - return 0; - - afptr++; - } - } - - for (ex = excludes; ex; ex = ex->next) - { - if (ex->type == 1) /* exclude-libs */ - { - if (libname - && ((strcmp (libname, ex->string) == 0) - || (strcasecmp ("ALL", ex->string) == 0))) - return 0; - } - else if (strcmp (n, ex->string) == 0) - return 0; - } - - return 1; -} - -static void -process_def_file (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_link_info *info) -{ - int i, j; - struct bfd_link_hash_entry *blhe; - bfd *b; - struct bfd_section *s; - def_file_export *e = 0; - - if (!pe_def_file) - pe_def_file = def_file_empty (); - - /* First, run around to all the objects looking for the .drectve - sections, and push those into the def file too. */ - for (b = info->input_bfds; b; b = b->link_next) - { - s = bfd_get_section_by_name (b, ".drectve"); - if (s) - { - int size = bfd_get_section_size_before_reloc (s); - char *buf = xmalloc (size); - - bfd_get_section_contents (b, s, buf, 0, size); - def_file_add_directive (pe_def_file, buf, size); - free (buf); - } - } - - /* If we are not building a DLL, when there are no exports - we do not build an export table at all. */ - if (!pe_dll_export_everything && pe_def_file->num_exports == 0 - && !info->shared) - return; - - /* Now, maybe export everything else the default way. */ - if (pe_dll_export_everything || pe_def_file->num_exports == 0) - { - for (b = info->input_bfds; b; b = b->link_next) - { - asymbol **symbols; - int nsyms, symsize; - - symsize = bfd_get_symtab_upper_bound (b); - symbols = xmalloc (symsize); - nsyms = bfd_canonicalize_symtab (b, symbols); - - for (j = 0; j < nsyms; j++) - { - /* We should export symbols which are either global or not - anything at all. (.bss data is the latter) - We should not export undefined symbols. */ - if (symbols[j]->section != &bfd_und_section - && ((symbols[j]->flags & BSF_GLOBAL) - || (symbols[j]->flags == BFD_FORT_COMM_DEFAULT_VALUE))) - { - const char *sn = symbols[j]->name; - - /* We should not re-export imported stuff. */ - { - char *name = xmalloc (strlen (sn) + 2 + 6); - sprintf (name, "%s%s", U("_imp_"), sn); - - blhe = bfd_link_hash_lookup (info->hash, name, - FALSE, FALSE, FALSE); - free (name); - - if (blhe && blhe->type == bfd_link_hash_defined) - continue; - } - - if (*sn == '_') - sn++; - - if (auto_export (b, pe_def_file, sn)) - { - def_file_export *p; - p=def_file_add_export (pe_def_file, sn, 0, -1); - /* Fill data flag properly, from dlltool.c. */ - p->flag_data = !(symbols[j]->flags & BSF_FUNCTION); - } - } - } - } - } - -#undef NE -#define NE pe_def_file->num_exports - - /* Canonicalize the export list. */ - if (pe_dll_kill_ats) - { - for (i = 0; i < NE; i++) - { - if (strchr (pe_def_file->exports[i].name, '@')) - { - /* This will preserve internal_name, which may have been - pointing to the same memory as name, or might not - have. */ - int lead_at = (*pe_def_file->exports[i].name == '@'); - char *tmp = xstrdup (pe_def_file->exports[i].name + lead_at); - - *(strchr (tmp, '@')) = 0; - pe_def_file->exports[i].name = tmp; - } - } - } - - if (pe_dll_stdcall_aliases) - { - for (i = 0; i < NE; i++) - { - if (strchr (pe_def_file->exports[i].name, '@')) - { - int lead_at = (*pe_def_file->exports[i].name == '@'); - char *tmp = xstrdup (pe_def_file->exports[i].name + lead_at); - - *(strchr (tmp, '@')) = 0; - if (auto_export (NULL, pe_def_file, tmp)) - def_file_add_export (pe_def_file, tmp, - pe_def_file->exports[i].internal_name, - -1); - else - free (tmp); - } - } - } - - /* Convenience, but watch out for it changing. */ - e = pe_def_file->exports; - - exported_symbol_offsets = xmalloc (NE * sizeof (bfd_vma)); - exported_symbol_sections = xmalloc (NE * sizeof (struct bfd_section *)); - - memset (exported_symbol_sections, 0, NE * sizeof (struct bfd_section *)); - max_ordinal = 0; - min_ordinal = 65536; - count_exported = 0; - count_exported_byname = 0; - count_with_ordinals = 0; - - qsort (pe_def_file->exports, NE, sizeof (pe_def_file->exports[0]), - pe_export_sort); - for (i = 0, j = 0; i < NE; i++) - { - if (i > 0 && strcmp (e[i].name, e[i - 1].name) == 0) - { - /* This is a duplicate. */ - if (e[j - 1].ordinal != -1 - && e[i].ordinal != -1 - && e[j - 1].ordinal != e[i].ordinal) - { - if (pe_dll_warn_dup_exports) - /* xgettext:c-format */ - einfo (_("%XError, duplicate EXPORT with ordinals: %s (%d vs %d)\n"), - e[j - 1].name, e[j - 1].ordinal, e[i].ordinal); - } - else - { - if (pe_dll_warn_dup_exports) - /* xgettext:c-format */ - einfo (_("Warning, duplicate EXPORT: %s\n"), - e[j - 1].name); - } - - if (e[i].ordinal != -1) - e[j - 1].ordinal = e[i].ordinal; - e[j - 1].flag_private |= e[i].flag_private; - e[j - 1].flag_constant |= e[i].flag_constant; - e[j - 1].flag_noname |= e[i].flag_noname; - e[j - 1].flag_data |= e[i].flag_data; - } - else - { - if (i != j) - e[j] = e[i]; - j++; - } - } - pe_def_file->num_exports = j; /* == NE */ - - for (i = 0; i < NE; i++) - { - char *name; - - name = xmalloc (strlen (pe_def_file->exports[i].internal_name) + 2); - if (pe_details->underscored - && (*pe_def_file->exports[i].internal_name != '@')) - { - *name = '_'; - strcpy (name + 1, pe_def_file->exports[i].internal_name); - } - else - strcpy (name, pe_def_file->exports[i].internal_name); - - blhe = bfd_link_hash_lookup (info->hash, - name, - FALSE, FALSE, TRUE); - - if (blhe - && (blhe->type == bfd_link_hash_defined - || (blhe->type == bfd_link_hash_common))) - { - count_exported++; - if (!pe_def_file->exports[i].flag_noname) - count_exported_byname++; - - /* Only fill in the sections. The actual offsets are computed - in fill_exported_offsets() after common symbols are laid - out. */ - if (blhe->type == bfd_link_hash_defined) - exported_symbol_sections[i] = blhe->u.def.section; - else - exported_symbol_sections[i] = blhe->u.c.p->section; - - if (pe_def_file->exports[i].ordinal != -1) - { - if (max_ordinal < pe_def_file->exports[i].ordinal) - max_ordinal = pe_def_file->exports[i].ordinal; - if (min_ordinal > pe_def_file->exports[i].ordinal) - min_ordinal = pe_def_file->exports[i].ordinal; - count_with_ordinals++; - } - } - else if (blhe && blhe->type == bfd_link_hash_undefined) - { - /* xgettext:c-format */ - einfo (_("%XCannot export %s: symbol not defined\n"), - pe_def_file->exports[i].internal_name); - } - else if (blhe) - { - /* xgettext:c-format */ - einfo (_("%XCannot export %s: symbol wrong type (%d vs %d)\n"), - pe_def_file->exports[i].internal_name, - blhe->type, bfd_link_hash_defined); - } - else - { - /* xgettext:c-format */ - einfo (_("%XCannot export %s: symbol not found\n"), - pe_def_file->exports[i].internal_name); - } - free (name); - } -} - -/* Build the bfd that will contain .edata and .reloc sections. */ - -static void -build_filler_bfd (int include_edata) -{ - lang_input_statement_type *filler_file; - filler_file = lang_add_input_file ("dll stuff", - lang_input_file_is_fake_enum, - NULL); - filler_file->the_bfd = filler_bfd = bfd_create ("dll stuff", output_bfd); - if (filler_bfd == NULL - || !bfd_set_arch_mach (filler_bfd, - bfd_get_arch (output_bfd), - bfd_get_mach (output_bfd))) - { - einfo ("%X%P: can not create BFD %E\n"); - return; - } - - if (include_edata) - { - edata_s = bfd_make_section_old_way (filler_bfd, ".edata"); - if (edata_s == NULL - || !bfd_set_section_flags (filler_bfd, edata_s, - (SEC_HAS_CONTENTS - | SEC_ALLOC - | SEC_LOAD - | SEC_KEEP - | SEC_IN_MEMORY))) - { - einfo ("%X%P: can not create .edata section: %E\n"); - return; - } - bfd_set_section_size (filler_bfd, edata_s, edata_sz); - } - - reloc_s = bfd_make_section_old_way (filler_bfd, ".reloc"); - if (reloc_s == NULL - || !bfd_set_section_flags (filler_bfd, reloc_s, - (SEC_HAS_CONTENTS - | SEC_ALLOC - | SEC_LOAD - | SEC_KEEP - | SEC_IN_MEMORY))) - { - einfo ("%X%P: can not create .reloc section: %E\n"); - return; - } - - bfd_set_section_size (filler_bfd, reloc_s, 0); - - ldlang_add_file (filler_file); -} - -/* Gather all the exported symbols and build the .edata section. */ - -static void -generate_edata (bfd *abfd, struct bfd_link_info *info ATTRIBUTE_UNUSED) -{ - int i, next_ordinal; - int name_table_size = 0; - const char *dlnp; - - /* First, we need to know how many exported symbols there are, - and what the range of ordinals is. */ - if (pe_def_file->name) - dll_name = pe_def_file->name; - else - { - dll_name = abfd->filename; - - for (dlnp = dll_name; *dlnp; dlnp++) - if (*dlnp == '\\' || *dlnp == '/' || *dlnp == ':') - dll_name = dlnp + 1; - } - - if (count_with_ordinals && max_ordinal > count_exported) - { - if (min_ordinal > max_ordinal - count_exported + 1) - min_ordinal = max_ordinal - count_exported + 1; - } - else - { - min_ordinal = 1; - max_ordinal = count_exported; - } - - export_table_size = max_ordinal - min_ordinal + 1; - exported_symbols = xmalloc (export_table_size * sizeof (int)); - for (i = 0; i < export_table_size; i++) - exported_symbols[i] = -1; - - /* Now we need to assign ordinals to those that don't have them. */ - for (i = 0; i < NE; i++) - { - if (exported_symbol_sections[i]) - { - if (pe_def_file->exports[i].ordinal != -1) - { - int ei = pe_def_file->exports[i].ordinal - min_ordinal; - int pi = exported_symbols[ei]; - - if (pi != -1) - { - /* xgettext:c-format */ - einfo (_("%XError, ordinal used twice: %d (%s vs %s)\n"), - pe_def_file->exports[i].ordinal, - pe_def_file->exports[i].name, - pe_def_file->exports[pi].name); - } - exported_symbols[ei] = i; - } - name_table_size += strlen (pe_def_file->exports[i].name) + 1; - } - } - - next_ordinal = min_ordinal; - for (i = 0; i < NE; i++) - if (exported_symbol_sections[i]) - if (pe_def_file->exports[i].ordinal == -1) - { - while (exported_symbols[next_ordinal - min_ordinal] != -1) - next_ordinal++; - - exported_symbols[next_ordinal - min_ordinal] = i; - pe_def_file->exports[i].ordinal = next_ordinal; - } - - /* OK, now we can allocate some memory. */ - edata_sz = (40 /* directory */ - + 4 * export_table_size /* addresses */ - + 4 * count_exported_byname /* name ptrs */ - + 2 * count_exported_byname /* ordinals */ - + name_table_size + strlen (dll_name) + 1); -} - -/* Fill the exported symbol offsets. The preliminary work has already - been done in process_def_file(). */ - -static void -fill_exported_offsets (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_link_info *info) -{ - int i; - struct bfd_link_hash_entry *blhe; - - for (i = 0; i < pe_def_file->num_exports; i++) - { - char *name; - - name = xmalloc (strlen (pe_def_file->exports[i].internal_name) + 2); - if (pe_details->underscored - && *pe_def_file->exports[i].internal_name != '@') - { - *name = '_'; - strcpy (name + 1, pe_def_file->exports[i].internal_name); - } - else - strcpy (name, pe_def_file->exports[i].internal_name); - - blhe = bfd_link_hash_lookup (info->hash, - name, - FALSE, FALSE, TRUE); - - if (blhe && blhe->type == bfd_link_hash_defined) - exported_symbol_offsets[i] = blhe->u.def.value; - - free (name); - } -} - -static void -fill_edata (bfd *abfd, struct bfd_link_info *info ATTRIBUTE_UNUSED) -{ - int s, hint; - unsigned char *edirectory; - unsigned char *eaddresses; - unsigned char *enameptrs; - unsigned char *eordinals; - unsigned char *enamestr; - time_t now; - - time (&now); - - edata_d = xmalloc (edata_sz); - - /* Note use of array pointer math here. */ - edirectory = edata_d; - eaddresses = edata_d + 40; - enameptrs = eaddresses + 4 * export_table_size; - eordinals = enameptrs + 4 * count_exported_byname; - enamestr = eordinals + 2 * count_exported_byname; - -#define ERVA(ptr) (((unsigned char *)(ptr) - edata_d) \ - + edata_s->output_section->vma - image_base) - - memset (edata_d, 0, edata_sz); - bfd_put_32 (abfd, now, edata_d + 4); - if (pe_def_file->version_major != -1) - { - bfd_put_16 (abfd, pe_def_file->version_major, edata_d + 8); - bfd_put_16 (abfd, pe_def_file->version_minor, edata_d + 10); - } - - bfd_put_32 (abfd, ERVA (enamestr), edata_d + 12); - strcpy (enamestr, dll_name); - enamestr += strlen (enamestr) + 1; - bfd_put_32 (abfd, min_ordinal, edata_d + 16); - bfd_put_32 (abfd, export_table_size, edata_d + 20); - bfd_put_32 (abfd, count_exported_byname, edata_d + 24); - bfd_put_32 (abfd, ERVA (eaddresses), edata_d + 28); - bfd_put_32 (abfd, ERVA (enameptrs), edata_d + 32); - bfd_put_32 (abfd, ERVA (eordinals), edata_d + 36); - - fill_exported_offsets (abfd, info); - - /* Ok, now for the filling in part. - Scan alphabetically - ie the ordering in the exports[] table, - rather than by ordinal - the ordering in the exported_symbol[] - table. See dlltool.c and: - http://sources.redhat.com/ml/binutils/2003-04/msg00379.html - for more information. */ - hint = 0; - for (s = 0; s < NE; s++) - { - struct bfd_section *ssec = exported_symbol_sections[s]; - if (ssec && pe_def_file->exports[s].ordinal != -1) - { - unsigned long srva = (exported_symbol_offsets[s] - + ssec->output_section->vma - + ssec->output_offset); - int ord = pe_def_file->exports[s].ordinal; - - bfd_put_32 (abfd, srva - image_base, - eaddresses + 4 * (ord - min_ordinal)); - - if (!pe_def_file->exports[s].flag_noname) - { - char *ename = pe_def_file->exports[s].name; - - bfd_put_32 (abfd, ERVA (enamestr), enameptrs); - enameptrs += 4; - strcpy (enamestr, ename); - enamestr += strlen (enamestr) + 1; - bfd_put_16 (abfd, ord - min_ordinal, eordinals); - eordinals += 2; - pe_def_file->exports[s].hint = hint++; - } - } - } -} - - -static struct bfd_section *current_sec; - -void -pe_walk_relocs_of_symbol (struct bfd_link_info *info, - const char *name, - int (*cb) (arelent *, asection *)) -{ - bfd *b; - asection *s; - - for (b = info->input_bfds; b; b = b->link_next) - { - asymbol **symbols; - int nsyms, symsize; - - symsize = bfd_get_symtab_upper_bound (b); - symbols = xmalloc (symsize); - nsyms = bfd_canonicalize_symtab (b, symbols); - - for (s = b->sections; s; s = s->next) - { - arelent **relocs; - int relsize, nrelocs, i; - int flags = bfd_get_section_flags (b, s); - - /* Skip discarded linkonce sections. */ - if (flags & SEC_LINK_ONCE - && s->output_section == bfd_abs_section_ptr) - continue; - - current_sec = s; - - relsize = bfd_get_reloc_upper_bound (b, s); - relocs = xmalloc (relsize); - nrelocs = bfd_canonicalize_reloc (b, s, relocs, symbols); - - for (i = 0; i < nrelocs; i++) - { - struct bfd_symbol *sym = *relocs[i]->sym_ptr_ptr; - - if (!strcmp (name, sym->name)) - cb (relocs[i], s); - } - - free (relocs); - - /* Warning: the allocated symbols are remembered in BFD and reused - later, so don't free them! */ - /* free (symbols); */ - } - } -} - -/* Gather all the relocations and build the .reloc section. */ - -static void -generate_reloc (bfd *abfd, struct bfd_link_info *info) -{ - - /* For .reloc stuff. */ - reloc_data_type *reloc_data; - int total_relocs = 0; - int i; - unsigned long sec_page = (unsigned long) -1; - unsigned long page_ptr, page_count; - int bi; - bfd *b; - struct bfd_section *s; - - total_relocs = 0; - for (b = info->input_bfds; b; b = b->link_next) - for (s = b->sections; s; s = s->next) - total_relocs += s->reloc_count; - - reloc_data = xmalloc (total_relocs * sizeof (reloc_data_type)); - - total_relocs = 0; - bi = 0; - for (bi = 0, b = info->input_bfds; b; bi++, b = b->link_next) - { - arelent **relocs; - int relsize, nrelocs, i; - - for (s = b->sections; s; s = s->next) - { - unsigned long sec_vma = s->output_section->vma + s->output_offset; - asymbol **symbols; - int nsyms, symsize; - - /* If it's not loaded, we don't need to relocate it this way. */ - if (!(s->output_section->flags & SEC_LOAD)) - continue; - - /* I don't know why there would be a reloc for these, but I've - seen it happen - DJ */ - if (s->output_section == &bfd_abs_section) - continue; - - if (s->output_section->vma == 0) - { - /* Huh? Shouldn't happen, but punt if it does. */ - einfo ("DJ: zero vma section reloc detected: `%s' #%d f=%d\n", - s->output_section->name, s->output_section->index, - s->output_section->flags); - continue; - } - - symsize = bfd_get_symtab_upper_bound (b); - symbols = xmalloc (symsize); - nsyms = bfd_canonicalize_symtab (b, symbols); - - relsize = bfd_get_reloc_upper_bound (b, s); - relocs = xmalloc (relsize); - nrelocs = bfd_canonicalize_reloc (b, s, relocs, symbols); - - for (i = 0; i < nrelocs; i++) - { - if (pe_dll_extra_pe_debug) - { - struct bfd_symbol *sym = *relocs[i]->sym_ptr_ptr; - printf ("rel: %s\n", sym->name); - } - if (!relocs[i]->howto->pc_relative - && relocs[i]->howto->type != pe_details->imagebase_reloc) - { - bfd_vma sym_vma; - struct bfd_symbol *sym = *relocs[i]->sym_ptr_ptr; - - sym_vma = (relocs[i]->addend - + sym->value - + sym->section->vma - + sym->section->output_offset - + sym->section->output_section->vma); - reloc_data[total_relocs].vma = sec_vma + relocs[i]->address; - -#define BITS_AND_SHIFT(bits, shift) (bits * 1000 | shift) - - switch BITS_AND_SHIFT (relocs[i]->howto->bitsize, - relocs[i]->howto->rightshift) - { - case BITS_AND_SHIFT (32, 0): - reloc_data[total_relocs].type = 3; - total_relocs++; - break; - case BITS_AND_SHIFT (16, 0): - reloc_data[total_relocs].type = 2; - total_relocs++; - break; - case BITS_AND_SHIFT (16, 16): - reloc_data[total_relocs].type = 4; - /* FIXME: we can't know the symbol's right value - yet, but we probably can safely assume that - CE will relocate us in 64k blocks, so leaving - it zero is safe. */ - reloc_data[total_relocs].extra = 0; - total_relocs++; - break; - case BITS_AND_SHIFT (26, 2): - reloc_data[total_relocs].type = 5; - total_relocs++; - break; - case BITS_AND_SHIFT (24, 2): - /* FIXME: 0 is ARM_26D, it is defined in bfd/coff-arm.c - Those ARM_xxx definitions should go in proper - header someday. */ - if (relocs[i]->howto->type == 0 - /* Older GNU linkers used 5 instead of 0 for this reloc. */ - || relocs[i]->howto->type == 5) - /* This is an ARM_26D reloc, which is an ARM_26 reloc - that has already been fully processed during a - previous link stage, so ignore it here. */ - break; - /* Fall through. */ - default: - /* xgettext:c-format */ - einfo (_("%XError: %d-bit reloc in dll\n"), - relocs[i]->howto->bitsize); - break; - } - } - } - free (relocs); - /* Warning: the allocated symbols are remembered in BFD and - reused later, so don't free them! */ -#if 0 - free (symbol); -#endif - } - } - - /* At this point, we have total_relocs relocation addresses in - reloc_addresses, which are all suitable for the .reloc section. - We must now create the new sections. */ - qsort (reloc_data, total_relocs, sizeof (*reloc_data), reloc_sort); - - for (i = 0; i < total_relocs; i++) - { - unsigned long this_page = (reloc_data[i].vma >> 12); - - if (this_page != sec_page) - { - reloc_sz = (reloc_sz + 3) & ~3; /* 4-byte align. */ - reloc_sz += 8; - sec_page = this_page; - } - - reloc_sz += 2; - - if (reloc_data[i].type == 4) - reloc_sz += 2; - } - - reloc_sz = (reloc_sz + 3) & ~3; /* 4-byte align. */ - reloc_d = xmalloc (reloc_sz); - sec_page = (unsigned long) -1; - reloc_sz = 0; - page_ptr = (unsigned long) -1; - page_count = 0; - - for (i = 0; i < total_relocs; i++) - { - unsigned long rva = reloc_data[i].vma - image_base; - unsigned long this_page = (rva & ~0xfff); - - if (this_page != sec_page) - { - while (reloc_sz & 3) - reloc_d[reloc_sz++] = 0; - - if (page_ptr != (unsigned long) -1) - bfd_put_32 (abfd, reloc_sz - page_ptr, reloc_d + page_ptr + 4); - - bfd_put_32 (abfd, this_page, reloc_d + reloc_sz); - page_ptr = reloc_sz; - reloc_sz += 8; - sec_page = this_page; - page_count = 0; - } - - bfd_put_16 (abfd, (rva & 0xfff) + (reloc_data[i].type << 12), - reloc_d + reloc_sz); - reloc_sz += 2; - - if (reloc_data[i].type == 4) - { - bfd_put_16 (abfd, reloc_data[i].extra, reloc_d + reloc_sz); - reloc_sz += 2; - } - - page_count++; - } - - while (reloc_sz & 3) - reloc_d[reloc_sz++] = 0; - - if (page_ptr != (unsigned long) -1) - bfd_put_32 (abfd, reloc_sz - page_ptr, reloc_d + page_ptr + 4); - - while (reloc_sz < reloc_s->_raw_size) - reloc_d[reloc_sz++] = 0; -} - -/* Given the exiting def_file structure, print out a .DEF file that - corresponds to it. */ - -static void -quoteput (char *s, FILE *f, int needs_quotes) -{ - char *cp; - - for (cp = s; *cp; cp++) - if (*cp == '\'' - || *cp == '"' - || *cp == '\\' - || ISSPACE (*cp) - || *cp == ',' - || *cp == ';') - needs_quotes = 1; - - if (needs_quotes) - { - putc ('"', f); - - while (*s) - { - if (*s == '"' || *s == '\\') - putc ('\\', f); - - putc (*s, f); - s++; - } - - putc ('"', f); - } - else - fputs (s, f); -} - -void -pe_dll_generate_def_file (const char *pe_out_def_filename) -{ - int i; - FILE *out = fopen (pe_out_def_filename, "w"); - - if (out == NULL) - /* xgettext:c-format */ - einfo (_("%s: Can't open output def file %s\n"), - program_name, pe_out_def_filename); - - if (pe_def_file) - { - if (pe_def_file->name) - { - if (pe_def_file->is_dll) - fprintf (out, "LIBRARY "); - else - fprintf (out, "NAME "); - - quoteput (pe_def_file->name, out, 1); - - if (pe_data (output_bfd)->pe_opthdr.ImageBase) - fprintf (out, " BASE=0x%lx", - (unsigned long) pe_data (output_bfd)->pe_opthdr.ImageBase); - fprintf (out, "\n"); - } - - if (pe_def_file->description) - { - fprintf (out, "DESCRIPTION "); - quoteput (pe_def_file->description, out, 1); - fprintf (out, "\n"); - } - - if (pe_def_file->version_minor != -1) - fprintf (out, "VERSION %d.%d\n", pe_def_file->version_major, - pe_def_file->version_minor); - else if (pe_def_file->version_major != -1) - fprintf (out, "VERSION %d\n", pe_def_file->version_major); - - if (pe_def_file->stack_reserve != -1 || pe_def_file->heap_reserve != -1) - fprintf (out, "\n"); - - if (pe_def_file->stack_commit != -1) - fprintf (out, "STACKSIZE 0x%x,0x%x\n", - pe_def_file->stack_reserve, pe_def_file->stack_commit); - else if (pe_def_file->stack_reserve != -1) - fprintf (out, "STACKSIZE 0x%x\n", pe_def_file->stack_reserve); - - if (pe_def_file->heap_commit != -1) - fprintf (out, "HEAPSIZE 0x%x,0x%x\n", - pe_def_file->heap_reserve, pe_def_file->heap_commit); - else if (pe_def_file->heap_reserve != -1) - fprintf (out, "HEAPSIZE 0x%x\n", pe_def_file->heap_reserve); - - if (pe_def_file->num_section_defs > 0) - { - fprintf (out, "\nSECTIONS\n\n"); - - for (i = 0; i < pe_def_file->num_section_defs; i++) - { - fprintf (out, " "); - quoteput (pe_def_file->section_defs[i].name, out, 0); - - if (pe_def_file->section_defs[i].class) - { - fprintf (out, " CLASS "); - quoteput (pe_def_file->section_defs[i].class, out, 0); - } - - if (pe_def_file->section_defs[i].flag_read) - fprintf (out, " READ"); - - if (pe_def_file->section_defs[i].flag_write) - fprintf (out, " WRITE"); - - if (pe_def_file->section_defs[i].flag_execute) - fprintf (out, " EXECUTE"); - - if (pe_def_file->section_defs[i].flag_shared) - fprintf (out, " SHARED"); - - fprintf (out, "\n"); - } - } - - if (pe_def_file->num_exports > 0) - { - fprintf (out, "EXPORTS\n"); - - for (i = 0; i < pe_def_file->num_exports; i++) - { - def_file_export *e = pe_def_file->exports + i; - fprintf (out, " "); - quoteput (e->name, out, 0); - - if (e->internal_name && strcmp (e->internal_name, e->name)) - { - fprintf (out, " = "); - quoteput (e->internal_name, out, 0); - } - - if (e->ordinal != -1) - fprintf (out, " @%d", e->ordinal); - - if (e->flag_private) - fprintf (out, " PRIVATE"); - - if (e->flag_constant) - fprintf (out, " CONSTANT"); - - if (e->flag_noname) - fprintf (out, " NONAME"); - - if (e->flag_data) - fprintf (out, " DATA"); - - fprintf (out, "\n"); - } - } - - if (pe_def_file->num_imports > 0) - { - fprintf (out, "\nIMPORTS\n\n"); - - for (i = 0; i < pe_def_file->num_imports; i++) - { - def_file_import *im = pe_def_file->imports + i; - fprintf (out, " "); - - if (im->internal_name - && (!im->name || strcmp (im->internal_name, im->name))) - { - quoteput (im->internal_name, out, 0); - fprintf (out, " = "); - } - - quoteput (im->module->name, out, 0); - fprintf (out, "."); - - if (im->name) - quoteput (im->name, out, 0); - else - fprintf (out, "%d", im->ordinal); - - fprintf (out, "\n"); - } - } - } - else - fprintf (out, _("; no contents available\n")); - - if (fclose (out) == EOF) - /* xgettext:c-format */ - einfo (_("%P: Error closing file `%s'\n"), pe_out_def_filename); -} - -/* Generate the import library. */ - -static asymbol **symtab; -static int symptr; -static int tmp_seq; -static const char *dll_filename; -static char *dll_symname; - -#define UNDSEC (asection *) &bfd_und_section - -static asection * -quick_section (bfd *abfd, const char *name, int flags, int align) -{ - asection *sec; - asymbol *sym; - - sec = bfd_make_section_old_way (abfd, name); - bfd_set_section_flags (abfd, sec, flags | SEC_ALLOC | SEC_LOAD | SEC_KEEP); - bfd_set_section_alignment (abfd, sec, align); - /* Remember to undo this before trying to link internally! */ - sec->output_section = sec; - - sym = bfd_make_empty_symbol (abfd); - symtab[symptr++] = sym; - sym->name = sec->name; - sym->section = sec; - sym->flags = BSF_LOCAL; - sym->value = 0; - - return sec; -} - -static void -quick_symbol (bfd *abfd, - const char *n1, - const char *n2, - const char *n3, - asection *sec, - int flags, - int addr) -{ - asymbol *sym; - char *name = xmalloc (strlen (n1) + strlen (n2) + strlen (n3) + 1); - - strcpy (name, n1); - strcat (name, n2); - strcat (name, n3); - sym = bfd_make_empty_symbol (abfd); - sym->name = name; - sym->section = sec; - sym->flags = flags; - sym->value = addr; - symtab[symptr++] = sym; -} - -static arelent *reltab = 0; -static int relcount = 0, relsize = 0; - -static void -quick_reloc (bfd *abfd, int address, int which_howto, int symidx) -{ - if (relcount >= relsize - 1) - { - relsize += 10; - if (reltab) - reltab = xrealloc (reltab, relsize * sizeof (arelent)); - else - reltab = xmalloc (relsize * sizeof (arelent)); - } - reltab[relcount].address = address; - reltab[relcount].addend = 0; - reltab[relcount].howto = bfd_reloc_type_lookup (abfd, which_howto); - reltab[relcount].sym_ptr_ptr = symtab + symidx; - relcount++; -} - -static void -save_relocs (asection *sec) -{ - int i; - - sec->relocation = reltab; - sec->reloc_count = relcount; - sec->orelocation = xmalloc ((relcount + 1) * sizeof (arelent *)); - for (i = 0; i < relcount; i++) - sec->orelocation[i] = sec->relocation + i; - sec->orelocation[relcount] = 0; - sec->flags |= SEC_RELOC; - reltab = 0; - relcount = relsize = 0; -} - -/* .section .idata$2 - .global __head_my_dll - __head_my_dll: - .rva hname - .long 0 - .long 0 - .rva __my_dll_iname - .rva fthunk - - .section .idata$5 - .long 0 - fthunk: - - .section .idata$4 - .long 0 - hname: */ - -static bfd * -make_head (bfd *parent) -{ - asection *id2, *id5, *id4; - unsigned char *d2, *d5, *d4; - char *oname; - bfd *abfd; - - oname = xmalloc (20); - sprintf (oname, "d%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 = xmalloc (6 * sizeof (asymbol *)); - id2 = quick_section (abfd, ".idata$2", SEC_HAS_CONTENTS, 2); - id5 = quick_section (abfd, ".idata$5", SEC_HAS_CONTENTS, 2); - id4 = quick_section (abfd, ".idata$4", SEC_HAS_CONTENTS, 2); - quick_symbol (abfd, U ("_head_"), dll_symname, "", id2, BSF_GLOBAL, 0); - quick_symbol (abfd, U (""), dll_symname, "_iname", UNDSEC, BSF_GLOBAL, 0); - - /* OK, pay attention here. I got confused myself looking back at - it. We create a four-byte section to mark the beginning of the - list, and we include an offset of 4 in the section, so that the - pointer to the list points to the *end* of this section, which is - the start of the list of sections from other objects. */ - - bfd_set_section_size (abfd, id2, 20); - d2 = xmalloc (20); - id2->contents = d2; - memset (d2, 0, 20); - d2[0] = d2[16] = 4; /* Reloc addend. */ - quick_reloc (abfd, 0, BFD_RELOC_RVA, 2); - quick_reloc (abfd, 12, BFD_RELOC_RVA, 4); - quick_reloc (abfd, 16, BFD_RELOC_RVA, 1); - save_relocs (id2); - - bfd_set_section_size (abfd, id5, 4); - d5 = xmalloc (4); - id5->contents = d5; - memset (d5, 0, 4); - - bfd_set_section_size (abfd, id4, 4); - d4 = xmalloc (4); - id4->contents = d4; - memset (d4, 0, 4); - - bfd_set_symtab (abfd, symtab, symptr); - - bfd_set_section_contents (abfd, id2, d2, 0, 20); - bfd_set_section_contents (abfd, id5, d5, 0, 4); - bfd_set_section_contents (abfd, id4, d4, 0, 4); - - bfd_make_readable (abfd); - return abfd; -} - -/* .section .idata$4 - .long 0 - .section .idata$5 - .long 0 - .section idata$7 - .global __my_dll_iname - __my_dll_iname: - .asciz "my.dll" */ - -static bfd * -make_tail (bfd *parent) -{ - asection *id4, *id5, *id7; - unsigned char *d4, *d5, *d7; - int len; - char *oname; - bfd *abfd; - - oname = xmalloc (20); - sprintf (oname, "d%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 = xmalloc (5 * sizeof (asymbol *)); - id4 = quick_section (abfd, ".idata$4", SEC_HAS_CONTENTS, 2); - id5 = quick_section (abfd, ".idata$5", SEC_HAS_CONTENTS, 2); - id7 = quick_section (abfd, ".idata$7", SEC_HAS_CONTENTS, 2); - quick_symbol (abfd, U (""), dll_symname, "_iname", id7, BSF_GLOBAL, 0); - - bfd_set_section_size (abfd, id4, 4); - d4 = xmalloc (4); - id4->contents = d4; - memset (d4, 0, 4); - - bfd_set_section_size (abfd, id5, 4); - d5 = xmalloc (4); - id5->contents = d5; - memset (d5, 0, 4); - - len = strlen (dll_filename) + 1; - if (len & 1) - len++; - bfd_set_section_size (abfd, id7, len); - d7 = xmalloc (len); - id7->contents = d7; - strcpy (d7, dll_filename); - - bfd_set_symtab (abfd, symtab, symptr); - - bfd_set_section_contents (abfd, id4, d4, 0, 4); - bfd_set_section_contents (abfd, id5, d5, 0, 4); - bfd_set_section_contents (abfd, id7, d7, 0, len); - - bfd_make_readable (abfd); - return abfd; -} - -/* .text - .global _function - .global ___imp_function - .global __imp__function - _function: - jmp *__imp__function: - - .section idata$7 - .long __head_my_dll - - .section .idata$5 - ___imp_function: - __imp__function: - iat? - .section .idata$4 - iat? - .section .idata$6 - ID<ordinal>: - .short <hint> - .asciz "function" xlate? (add underscore, kill at) */ - -static unsigned char jmp_ix86_bytes[] = -{ - 0xff, 0x25, 0x00, 0x00, 0x00, 0x00, 0x90, 0x90 -}; - -/* _function: - mov.l ip+8,r0 - mov.l @r0,r0 - jmp @r0 - nop - .dw __imp_function */ - -static unsigned char jmp_sh_bytes[] = -{ - 0x01, 0xd0, 0x02, 0x60, 0x2b, 0x40, 0x09, 0x00, 0x00, 0x00, 0x00, 0x00 -}; - -/* _function: - lui $t0,<high:__imp_function> - lw $t0,<low:__imp_function> - jr $t0 - nop */ - -static unsigned char jmp_mips_bytes[] = -{ - 0x00, 0x00, 0x08, 0x3c, 0x00, 0x00, 0x08, 0x8d, - 0x08, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00 -}; - -static bfd * -make_one (def_file_export *exp, bfd *parent) -{ - asection *tx, *id7, *id5, *id4, *id6; - unsigned char *td = NULL, *d7, *d5, *d4, *d6 = NULL; - int len; - char *oname; - bfd *abfd; - unsigned char *jmp_bytes = NULL; - int jmp_byte_count = 0; - - switch (pe_details->pe_arch) - { - case PE_ARCH_i386: - jmp_bytes = jmp_ix86_bytes; - jmp_byte_count = sizeof (jmp_ix86_bytes); - break; - case PE_ARCH_sh: - jmp_bytes = jmp_sh_bytes; - jmp_byte_count = sizeof (jmp_sh_bytes); - break; - case PE_ARCH_mips: - jmp_bytes = jmp_mips_bytes; - jmp_byte_count = sizeof (jmp_mips_bytes); - break; - default: - abort (); - } - - oname = xmalloc (20); - sprintf (oname, "d%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 = xmalloc (11 * sizeof (asymbol *)); - tx = quick_section (abfd, ".text", SEC_CODE|SEC_HAS_CONTENTS, 2); - id7 = quick_section (abfd, ".idata$7", SEC_HAS_CONTENTS, 2); - id5 = quick_section (abfd, ".idata$5", SEC_HAS_CONTENTS, 2); - id4 = quick_section (abfd, ".idata$4", SEC_HAS_CONTENTS, 2); - id6 = quick_section (abfd, ".idata$6", SEC_HAS_CONTENTS, 2); - - if (*exp->internal_name == '@') - { - quick_symbol (abfd, U ("_head_"), dll_symname, "", UNDSEC, - BSF_GLOBAL, 0); - if (! exp->flag_data) - quick_symbol (abfd, "", exp->internal_name, "", tx, BSF_GLOBAL, 0); - quick_symbol (abfd, U ("_imp_"), exp->internal_name, "", id5, - BSF_GLOBAL, 0); - /* Fastcall applies only to functions, - so no need for auto-import symbol. */ - } - else - { - quick_symbol (abfd, U ("_head_"), dll_symname, "", UNDSEC, - BSF_GLOBAL, 0); - if (! exp->flag_data) - quick_symbol (abfd, U (""), exp->internal_name, "", tx, - BSF_GLOBAL, 0); - quick_symbol (abfd, U ("_imp__"), exp->internal_name, "", id5, - BSF_GLOBAL, 0); - /* Symbol to reference ord/name of imported - data symbol, used to implement auto-import. */ - if (exp->flag_data) - quick_symbol (abfd, U("_nm__"), exp->internal_name, "", id6, - BSF_GLOBAL,0); - } - if (pe_dll_compat_implib) - quick_symbol (abfd, U ("__imp_"), exp->internal_name, "", id5, - BSF_GLOBAL, 0); - - if (! exp->flag_data) - { - bfd_set_section_size (abfd, tx, jmp_byte_count); - td = xmalloc (jmp_byte_count); - tx->contents = td; - memcpy (td, jmp_bytes, jmp_byte_count); - - switch (pe_details->pe_arch) - { - case PE_ARCH_i386: - quick_reloc (abfd, 2, BFD_RELOC_32, 2); - break; - case PE_ARCH_sh: - quick_reloc (abfd, 8, BFD_RELOC_32, 2); - break; - case PE_ARCH_mips: - quick_reloc (abfd, 0, BFD_RELOC_HI16_S, 2); - quick_reloc (abfd, 0, BFD_RELOC_LO16, 0); /* MIPS_R_PAIR */ - quick_reloc (abfd, 4, BFD_RELOC_LO16, 2); - break; - default: - abort (); - } - save_relocs (tx); - } - - bfd_set_section_size (abfd, id7, 4); - d7 = xmalloc (4); - id7->contents = d7; - memset (d7, 0, 4); - quick_reloc (abfd, 0, BFD_RELOC_RVA, 5); - save_relocs (id7); - - bfd_set_section_size (abfd, id5, 4); - d5 = xmalloc (4); - id5->contents = d5; - memset (d5, 0, 4); - - if (exp->flag_noname) - { - d5[0] = exp->ordinal; - d5[1] = exp->ordinal >> 8; - d5[3] = 0x80; - } - else - { - quick_reloc (abfd, 0, BFD_RELOC_RVA, 4); - save_relocs (id5); - } - - bfd_set_section_size (abfd, id4, 4); - d4 = xmalloc (4); - id4->contents = d4; - memset (d4, 0, 4); - - if (exp->flag_noname) - { - d4[0] = exp->ordinal; - d4[1] = exp->ordinal >> 8; - d4[3] = 0x80; - } - else - { - quick_reloc (abfd, 0, BFD_RELOC_RVA, 4); - save_relocs (id4); - } - - if (exp->flag_noname) - { - len = 0; - bfd_set_section_size (abfd, id6, 0); - } - else - { - len = strlen (exp->name) + 3; - if (len & 1) - len++; - bfd_set_section_size (abfd, id6, len); - d6 = xmalloc (len); - id6->contents = d6; - memset (d6, 0, len); - d6[0] = exp->hint & 0xff; - d6[1] = exp->hint >> 8; - strcpy (d6 + 2, exp->name); - } - - bfd_set_symtab (abfd, symtab, symptr); - - bfd_set_section_contents (abfd, tx, td, 0, jmp_byte_count); - bfd_set_section_contents (abfd, id7, d7, 0, 4); - bfd_set_section_contents (abfd, id5, d5, 0, 4); - bfd_set_section_contents (abfd, id4, d4, 0, 4); - if (!exp->flag_noname) - bfd_set_section_contents (abfd, id6, d6, 0, len); - - bfd_make_readable (abfd); - return abfd; -} - -static bfd * -make_singleton_name_thunk (const char *import, bfd *parent) -{ - /* Name thunks go to idata$4. */ - asection *id4; - unsigned char *d4; - char *oname; - bfd *abfd; - - oname = xmalloc (20); - sprintf (oname, "nmth%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 = xmalloc (3 * sizeof (asymbol *)); - id4 = quick_section (abfd, ".idata$4", SEC_HAS_CONTENTS, 2); - quick_symbol (abfd, U ("_nm_thnk_"), import, "", id4, BSF_GLOBAL, 0); - quick_symbol (abfd, U ("_nm_"), import, "", UNDSEC, BSF_GLOBAL, 0); - - bfd_set_section_size (abfd, id4, 8); - d4 = xmalloc (4); - id4->contents = d4; - memset (d4, 0, 8); - quick_reloc (abfd, 0, BFD_RELOC_RVA, 2); - save_relocs (id4); - - bfd_set_symtab (abfd, symtab, symptr); - - bfd_set_section_contents (abfd, id4, d4, 0, 8); - - bfd_make_readable (abfd); - return abfd; -} - -static char * -make_import_fixup_mark (arelent *rel) -{ - /* We convert reloc to symbol, for later reference. */ - static int counter; - static char *fixup_name = NULL; - static size_t buffer_len = 0; - - struct bfd_symbol *sym = *rel->sym_ptr_ptr; - - bfd *abfd = bfd_asymbol_bfd (sym); - struct bfd_link_hash_entry *bh; - - if (!fixup_name) - { - fixup_name = xmalloc (384); - buffer_len = 384; - } - - if (strlen (sym->name) + 25 > buffer_len) - /* Assume 25 chars for "__fu" + counter + "_". If counter is - bigger than 20 digits long, we've got worse problems than - overflowing this buffer... */ - { - free (fixup_name); - /* New buffer size is length of symbol, plus 25, but - then rounded up to the nearest multiple of 128. */ - buffer_len = ((strlen (sym->name) + 25) + 127) & ~127; - fixup_name = xmalloc (buffer_len); - } - - sprintf (fixup_name, "__fu%d_%s", counter++, sym->name); - - bh = NULL; - bfd_coff_link_add_one_symbol (&link_info, abfd, fixup_name, BSF_GLOBAL, - current_sec, /* sym->section, */ - rel->address, NULL, TRUE, FALSE, &bh); - - if (0) - { - struct coff_link_hash_entry *myh; - - myh = (struct coff_link_hash_entry *) bh; - printf ("type:%d\n", myh->type); - printf ("%s\n", myh->root.u.def.section->name); - } - - return fixup_name; -} - -/* .section .idata$3 - .rva __nm_thnk_SYM (singleton thunk with name of func) - .long 0 - .long 0 - .rva __my_dll_iname (name of dll) - .rva __fuNN_SYM (pointer to reference (address) in text) */ - -static bfd * -make_import_fixup_entry (const char *name, - const char *fixup_name, - const char *dll_symname, - bfd *parent) -{ - asection *id3; - unsigned char *d3; - char *oname; - bfd *abfd; - - oname = xmalloc (20); - sprintf (oname, "fu%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 = xmalloc (6 * sizeof (asymbol *)); - id3 = quick_section (abfd, ".idata$3", SEC_HAS_CONTENTS, 2); - -#if 0 - quick_symbol (abfd, U ("_head_"), dll_symname, "", id2, BSF_GLOBAL, 0); -#endif - quick_symbol (abfd, U ("_nm_thnk_"), name, "", UNDSEC, BSF_GLOBAL, 0); - quick_symbol (abfd, U (""), dll_symname, "_iname", UNDSEC, BSF_GLOBAL, 0); - quick_symbol (abfd, "", fixup_name, "", UNDSEC, BSF_GLOBAL, 0); - - bfd_set_section_size (abfd, id3, 20); - d3 = xmalloc (20); - id3->contents = d3; - memset (d3, 0, 20); - - quick_reloc (abfd, 0, BFD_RELOC_RVA, 1); - quick_reloc (abfd, 12, BFD_RELOC_RVA, 2); - quick_reloc (abfd, 16, BFD_RELOC_RVA, 3); - save_relocs (id3); - - bfd_set_symtab (abfd, symtab, symptr); - - bfd_set_section_contents (abfd, id3, d3, 0, 20); - - bfd_make_readable (abfd); - return abfd; -} - -/* .section .rdata_runtime_pseudo_reloc - .long addend - .rva __fuNN_SYM (pointer to reference (address) in text) */ - -static bfd * -make_runtime_pseudo_reloc (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 = 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 = 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 = 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 (bfd *parent) -{ - asection *extern_rt_rel; - unsigned char *extern_rt_rel_d; - char *oname; - bfd *abfd; - - oname = 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 = 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 = 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 (arelent *rel, asection *s, int addend) -{ - char buf[300]; - struct bfd_symbol *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); - - name_thunk_sym = bfd_link_hash_lookup (link_info.hash, buf, 0, 0, 1); - - if (!name_thunk_sym || name_thunk_sym->type != bfd_link_hash_defined) - { - bfd *b = make_singleton_name_thunk (name, output_bfd); - add_bfd_to_link (b, b->filename, &link_info); - - /* If we ever use autoimport, we have to cast text section writable. */ - config.text_read_only = FALSE; - output_bfd->flags &= ~WP_TEXT; - } - - 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"; - - 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"); - } - } -} - - -void -pe_dll_generate_implib (def_file *def, const char *impfilename) -{ - int i; - bfd *ar_head; - bfd *ar_tail; - bfd *outarch; - bfd *head = 0; - - dll_filename = (def->name) ? def->name : dll_name; - dll_symname = xstrdup (dll_filename); - for (i = 0; dll_symname[i]; i++) - if (!ISALNUM (dll_symname[i])) - dll_symname[i] = '_'; - - unlink (impfilename); - - outarch = bfd_openw (impfilename, 0); - - if (!outarch) - { - /* xgettext:c-format */ - einfo (_("%XCan't open .lib file: %s\n"), impfilename); - return; - } - - /* xgettext:c-format */ - einfo (_("Creating library file: %s\n"), impfilename); - - bfd_set_format (outarch, bfd_archive); - outarch->has_armap = 1; - - /* Work out a reasonable size of things to put onto one line. */ - ar_head = make_head (outarch); - - for (i = 0; i < def->num_exports; i++) - { - /* The import library doesn't know about the internal name. */ - char *internal = def->exports[i].internal_name; - bfd *n; - - /* Don't add PRIVATE entries to import lib. */ - if (pe_def_file->exports[i].flag_private) - continue; - def->exports[i].internal_name = def->exports[i].name; - n = make_one (def->exports + i, outarch); - n->next = head; - head = n; - def->exports[i].internal_name = internal; - } - - ar_tail = make_tail (outarch); - - if (ar_head == NULL || ar_tail == NULL) - return; - - /* Now stick them all into the archive. */ - ar_head->next = head; - ar_tail->next = ar_head; - head = ar_tail; - - if (! bfd_set_archive_head (outarch, head)) - einfo ("%Xbfd_set_archive_head: %s\n", bfd_errmsg (bfd_get_error ())); - - if (! bfd_close (outarch)) - einfo ("%Xbfd_close %s: %s\n", impfilename, bfd_errmsg (bfd_get_error ())); - - while (head != NULL) - { - bfd *n = head->next; - bfd_close (head); - head = n; - } -} - -static void -add_bfd_to_link (bfd *abfd, const char *name, struct bfd_link_info *link_info) -{ - lang_input_statement_type *fake_file; - - fake_file = lang_add_input_file (name, - lang_input_file_is_fake_enum, - NULL); - fake_file->the_bfd = abfd; - ldlang_add_file (fake_file); - - if (!bfd_link_add_symbols (abfd, link_info)) - einfo ("%Xaddsym %s: %s\n", name, bfd_errmsg (bfd_get_error ())); -} - -void -pe_process_import_defs (bfd *output_bfd, struct bfd_link_info *link_info) -{ - def_file_module *module; - - pe_dll_id_target (bfd_get_target (output_bfd)); - - if (!pe_def_file) - return; - - for (module = pe_def_file->modules; module; module = module->next) - { - int i, do_this_dll; - - dll_filename = module->name; - dll_symname = xstrdup (module->name); - for (i = 0; dll_symname[i]; i++) - if (!ISALNUM (dll_symname[i])) - dll_symname[i] = '_'; - - do_this_dll = 0; - - for (i = 0; i < pe_def_file->num_imports; i++) - if (pe_def_file->imports[i].module == module) - { - def_file_export exp; - struct bfd_link_hash_entry *blhe; - int lead_at = (*pe_def_file->imports[i].internal_name == '@'); - /* See if we need this import. */ - size_t len = strlen (pe_def_file->imports[i].internal_name); - char *name = xmalloc (len + 2 + 6); - - if (lead_at) - sprintf (name, "%s%s", "", - pe_def_file->imports[i].internal_name); - else - sprintf (name, "%s%s",U (""), - pe_def_file->imports[i].internal_name); - - blhe = bfd_link_hash_lookup (link_info->hash, name, - FALSE, FALSE, FALSE); - - if (!blhe || (blhe && blhe->type != bfd_link_hash_undefined)) - { - if (lead_at) - sprintf (name, "%s%s", U ("_imp_"), - pe_def_file->imports[i].internal_name); - else - sprintf (name, "%s%s", U ("_imp__"), - pe_def_file->imports[i].internal_name); - - blhe = bfd_link_hash_lookup (link_info->hash, name, - FALSE, FALSE, FALSE); - } - free (name); - - if (blhe && blhe->type == bfd_link_hash_undefined) - { - bfd *one; - /* We do. */ - if (!do_this_dll) - { - bfd *ar_head = make_head (output_bfd); - add_bfd_to_link (ar_head, ar_head->filename, link_info); - do_this_dll = 1; - } - exp.internal_name = pe_def_file->imports[i].internal_name; - exp.name = pe_def_file->imports[i].name; - exp.ordinal = pe_def_file->imports[i].ordinal; - exp.hint = exp.ordinal >= 0 ? exp.ordinal : 0; - exp.flag_private = 0; - exp.flag_constant = 0; - exp.flag_data = pe_def_file->imports[i].data; - exp.flag_noname = exp.name ? 0 : 1; - one = make_one (&exp, output_bfd); - add_bfd_to_link (one, one->filename, link_info); - } - } - if (do_this_dll) - { - bfd *ar_tail = make_tail (output_bfd); - add_bfd_to_link (ar_tail, ar_tail->filename, link_info); - } - - free (dll_symname); - } -} - -/* We were handed a *.DLL file. Parse it and turn it into a set of - IMPORTS directives in the def file. Return TRUE if the file was - handled, FALSE if not. */ - -static unsigned int -pe_get16 (bfd *abfd, int where) -{ - unsigned char b[2]; - - bfd_seek (abfd, (file_ptr) where, SEEK_SET); - bfd_bread (b, (bfd_size_type) 2, abfd); - return b[0] + (b[1] << 8); -} - -static unsigned int -pe_get32 (bfd *abfd, int where) -{ - unsigned char b[4]; - - bfd_seek (abfd, (file_ptr) where, SEEK_SET); - bfd_bread (b, (bfd_size_type) 4, abfd); - return b[0] + (b[1] << 8) + (b[2] << 16) + (b[3] << 24); -} - -#if 0 /* This is not currently used. */ - -static unsigned int -pe_as16 (void *ptr) -{ - unsigned char *b = ptr; - - return b[0] + (b[1] << 8); -} - -#endif - -static unsigned int -pe_as32 (void *ptr) -{ - unsigned char *b = ptr; - - return b[0] + (b[1] << 8) + (b[2] << 16) + (b[3] << 24); -} - -bfd_boolean -pe_implied_import_dll (const char *filename) -{ - bfd *dll; - unsigned long pe_header_offset, opthdr_ofs, num_entries, i; - unsigned long export_rva, export_size, nsections, secptr, expptr; - unsigned long exp_funcbase; - unsigned char *expdata, *erva; - unsigned long name_rvas, ordinals, nexp, ordbase; - const char *dll_name; - /* Initialization with start > end guarantees that is_data - will not be set by mistake, and avoids compiler warning. */ - unsigned long data_start = 1; - unsigned long data_end = 0; - unsigned long rdata_start = 1; - unsigned long rdata_end = 0; - unsigned long bss_start = 1; - unsigned long bss_end = 0; - - /* No, I can't use bfd here. kernel32.dll puts its export table in - the middle of the .rdata section. */ - dll = bfd_openr (filename, pe_details->target_name); - if (!dll) - { - einfo ("%Xopen %s: %s\n", filename, bfd_errmsg (bfd_get_error ())); - return FALSE; - } - - /* PEI dlls seem to be bfd_objects. */ - if (!bfd_check_format (dll, bfd_object)) - { - einfo ("%X%s: this doesn't appear to be a DLL\n", filename); - return FALSE; - } - - /* Get pe_header, optional header and numbers of export entries. */ - pe_header_offset = pe_get32 (dll, 0x3c); - opthdr_ofs = pe_header_offset + 4 + 20; - num_entries = pe_get32 (dll, opthdr_ofs + 92); - - if (num_entries < 1) /* No exports. */ - return FALSE; - - export_rva = pe_get32 (dll, opthdr_ofs + 96); - export_size = pe_get32 (dll, opthdr_ofs + 100); - nsections = pe_get16 (dll, pe_header_offset + 4 + 2); - secptr = (pe_header_offset + 4 + 20 + - pe_get16 (dll, pe_header_offset + 4 + 16)); - expptr = 0; - - /* Get the rva and size of the export section. */ - for (i = 0; i < nsections; i++) - { - char sname[8]; - unsigned long secptr1 = secptr + 40 * i; - unsigned long vaddr = pe_get32 (dll, secptr1 + 12); - unsigned long vsize = pe_get32 (dll, secptr1 + 16); - unsigned long fptr = pe_get32 (dll, secptr1 + 20); - - bfd_seek (dll, (file_ptr) secptr1, SEEK_SET); - bfd_bread (sname, (bfd_size_type) 8, dll); - - if (vaddr <= export_rva && vaddr + vsize > export_rva) - { - expptr = fptr + (export_rva - vaddr); - if (export_rva + export_size > vaddr + vsize) - export_size = vsize - (export_rva - vaddr); - break; - } - } - - /* Scan sections and store the base and size of the - data and bss segments in data/base_start/end. */ - for (i = 0; i < nsections; i++) - { - unsigned long secptr1 = secptr + 40 * i; - unsigned long vsize = pe_get32 (dll, secptr1 + 8); - unsigned long vaddr = pe_get32 (dll, secptr1 + 12); - unsigned long flags = pe_get32 (dll, secptr1 + 36); - char sec_name[9]; - - sec_name[8] = '\0'; - bfd_seek (dll, (file_ptr) secptr1 + 0, SEEK_SET); - bfd_bread (sec_name, (bfd_size_type) 8, dll); - - if (strcmp(sec_name,".data") == 0) - { - data_start = vaddr; - data_end = vaddr + vsize; - - if (pe_dll_extra_pe_debug) - printf ("%s %s: 0x%08lx-0x%08lx (0x%08lx)\n", - __FUNCTION__, sec_name, vaddr, vaddr + vsize, flags); - } - else if (strcmp(sec_name,".rdata") == 0) - { - rdata_start = vaddr; - rdata_end = vaddr + vsize; - - if (pe_dll_extra_pe_debug) - printf ("%s %s: 0x%08lx-0x%08lx (0x%08lx)\n", - __FUNCTION__, sec_name, vaddr, vaddr + vsize, flags); - } - else if (strcmp (sec_name,".bss") == 0) - { - bss_start = vaddr; - bss_end = vaddr + vsize; - - if (pe_dll_extra_pe_debug) - printf ("%s %s: 0x%08lx-0x%08lx (0x%08lx)\n", - __FUNCTION__, sec_name, vaddr, vaddr + vsize, flags); - } - } - - expdata = xmalloc (export_size); - bfd_seek (dll, (file_ptr) expptr, SEEK_SET); - bfd_bread (expdata, (bfd_size_type) export_size, dll); - erva = expdata - export_rva; - - if (pe_def_file == 0) - pe_def_file = def_file_empty (); - - nexp = pe_as32 (expdata + 24); - name_rvas = pe_as32 (expdata + 32); - ordinals = pe_as32 (expdata + 36); - ordbase = pe_as32 (expdata + 16); - exp_funcbase = pe_as32 (expdata + 28); - - /* Use internal dll name instead of filename - to enable symbolic dll linking. */ - dll_name = pe_as32 (expdata + 12) + erva; - - /* Check to see if the dll has already been added to - the definition list and if so return without error. - This avoids multiple symbol definitions. */ - if (def_get_module (pe_def_file, dll_name)) - { - if (pe_dll_extra_pe_debug) - printf ("%s is already loaded\n", dll_name); - return TRUE; - } - - /* Iterate through the list of symbols. */ - for (i = 0; i < nexp; i++) - { - /* Pointer to the names vector. */ - unsigned long name_rva = pe_as32 (erva + name_rvas + i * 4); - def_file_import *imp; - /* Pointer to the function address vector. */ - unsigned long func_rva = pe_as32 (erva + exp_funcbase + i * 4); - int is_data = 0; - - /* Skip unwanted symbols, which are - exported in buggy auto-import releases. */ - if (strncmp (erva + name_rva, "_nm_", 4) != 0) - { - /* is_data is true if the address is in the data, rdata or bss - segment. */ - is_data = - (func_rva >= data_start && func_rva < data_end) - || (func_rva >= rdata_start && func_rva < rdata_end) - || (func_rva >= bss_start && func_rva < bss_end); - - imp = def_file_add_import (pe_def_file, erva + name_rva, - dll_name, i, 0); - /* Mark symbol type. */ - imp->data = is_data; - - if (pe_dll_extra_pe_debug) - printf ("%s dll-name: %s sym: %s addr: 0x%lx %s\n", - __FUNCTION__, dll_name, erva + name_rva, - func_rva, is_data ? "(data)" : ""); - } - } - - return TRUE; -} - -/* These are the main functions, called from the emulation. The first - is called after the bfds are read, so we can guess at how much space - we need. The second is called after everything is placed, so we - can put the right values in place. */ - -void -pe_dll_build_sections (bfd *abfd, struct bfd_link_info *info) -{ - pe_dll_id_target (bfd_get_target (abfd)); - process_def_file (abfd, info); - - if (pe_def_file->num_exports == 0 && !info->shared) - return; - - generate_edata (abfd, info); - build_filler_bfd (1); -} - -void -pe_exe_build_sections (bfd *abfd, struct bfd_link_info *info ATTRIBUTE_UNUSED) -{ - pe_dll_id_target (bfd_get_target (abfd)); - build_filler_bfd (0); -} - -void -pe_dll_fill_sections (bfd *abfd, struct bfd_link_info *info) -{ - pe_dll_id_target (bfd_get_target (abfd)); - image_base = pe_data (abfd)->pe_opthdr.ImageBase; - - generate_reloc (abfd, info); - if (reloc_sz > 0) - { - bfd_set_section_size (filler_bfd, reloc_s, reloc_sz); - - /* Resize the sections. */ - lang_size_sections (stat_ptr->head, abs_output_section, - &stat_ptr->head, 0, 0, NULL, TRUE); - - /* Redo special stuff. */ - ldemul_after_allocation (); - - /* Do the assignments again. */ - lang_do_assignments (stat_ptr->head, abs_output_section, NULL, 0); - } - - fill_edata (abfd, info); - - if (info->shared) - pe_data (abfd)->dll = 1; - - edata_s->contents = edata_d; - reloc_s->contents = reloc_d; -} - -void -pe_exe_fill_sections (bfd *abfd, struct bfd_link_info *info) -{ - pe_dll_id_target (bfd_get_target (abfd)); - image_base = pe_data (abfd)->pe_opthdr.ImageBase; - - generate_reloc (abfd, info); - if (reloc_sz > 0) - { - bfd_set_section_size (filler_bfd, reloc_s, reloc_sz); - - /* Resize the sections. */ - lang_size_sections (stat_ptr->head, abs_output_section, - &stat_ptr->head, 0, 0, NULL, TRUE); - - /* Redo special stuff. */ - ldemul_after_allocation (); - - /* Do the assignments again. */ - lang_do_assignments (stat_ptr->head, abs_output_section, NULL, 0); - } - reloc_s->contents = reloc_d; -} |
