diff options
Diffstat (limited to 'binutils-2.25/binutils/rescoff.c')
| -rw-r--r-- | binutils-2.25/binutils/rescoff.c | 750 |
1 files changed, 750 insertions, 0 deletions
diff --git a/binutils-2.25/binutils/rescoff.c b/binutils-2.25/binutils/rescoff.c new file mode 100644 index 00000000..8799ea2b --- /dev/null +++ b/binutils-2.25/binutils/rescoff.c @@ -0,0 +1,750 @@ +/* rescoff.c -- read and write resources in Windows COFF files. + Copyright 1997, 1998, 1999, 2000, 2003, 2005, 2007, 2008 + Free Software Foundation, Inc. + Written by Ian Lance Taylor, Cygnus Support. + Rewritten by Kai Tietz, Onevision. + + This file is part of GNU Binutils. + + This program 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 3 of the License, or + (at your option) any later version. + + This program 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 this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA + 02110-1301, USA. */ + +/* This file contains function that read and write Windows resources + in COFF files. */ + +#include "sysdep.h" +#include "bfd.h" +#include "bucomm.h" +#include "libiberty.h" +#include "windres.h" + +#include <assert.h> + +/* In order to use the address of a resource data entry, we need to + get the image base of the file. Right now we extract it from + internal BFD information. FIXME. */ + +#include "coff/internal.h" +#include "libcoff.h" + +/* Information we extract from the file. */ + +struct coff_file_info +{ + /* File name. */ + const char *filename; + /* Data read from the file. */ + const bfd_byte *data; + /* End of data read from file. */ + const bfd_byte *data_end; + /* Address of the resource section minus the image base of the file. */ + rc_uint_type secaddr; +}; + +/* A resource directory table in a COFF file. */ + +struct __attribute__ ((__packed__)) extern_res_directory +{ + /* Characteristics. */ + bfd_byte characteristics[4]; + /* Time stamp. */ + bfd_byte time[4]; + /* Major version number. */ + bfd_byte major[2]; + /* Minor version number. */ + bfd_byte minor[2]; + /* Number of named directory entries. */ + bfd_byte name_count[2]; + /* Number of directory entries with IDs. */ + bfd_byte id_count[2]; +}; + +/* A resource directory entry in a COFF file. */ + +struct extern_res_entry +{ + /* Name or ID. */ + bfd_byte name[4]; + /* Address of resource entry or subdirectory. */ + bfd_byte rva[4]; +}; + +/* A resource data entry in a COFF file. */ + +struct extern_res_data +{ + /* Address of resource data. This is apparently a file relative + address, rather than a section offset. */ + bfd_byte rva[4]; + /* Size of resource data. */ + bfd_byte size[4]; + /* Code page. */ + bfd_byte codepage[4]; + /* Reserved. */ + bfd_byte reserved[4]; +}; + +/* Local functions. */ + +static void overrun (const struct coff_file_info *, const char *); +static rc_res_directory *read_coff_res_dir (windres_bfd *, const bfd_byte *, + const struct coff_file_info *, + const rc_res_id *, int); +static rc_res_resource *read_coff_data_entry (windres_bfd *, const bfd_byte *, + const struct coff_file_info *, + const rc_res_id *); + +/* Read the resources in a COFF file. */ + +rc_res_directory * +read_coff_rsrc (const char *filename, const char *target) +{ + rc_res_directory *ret; + bfd *abfd; + windres_bfd wrbfd; + char **matching; + asection *sec; + bfd_size_type size; + bfd_byte *data; + struct coff_file_info flaginfo; + + if (filename == NULL) + fatal (_("filename required for COFF input")); + + abfd = bfd_openr (filename, target); + if (abfd == NULL) + bfd_fatal (filename); + + if (! bfd_check_format_matches (abfd, bfd_object, &matching)) + { + bfd_nonfatal (bfd_get_filename (abfd)); + if (bfd_get_error () == bfd_error_file_ambiguously_recognized) + list_matching_formats (matching); + xexit (1); + } + + sec = bfd_get_section_by_name (abfd, ".rsrc"); + if (sec == NULL) + { + fatal (_("%s: no resource section"), filename); + } + + set_windres_bfd (&wrbfd, abfd, sec, WR_KIND_BFD); + size = bfd_section_size (abfd, sec); + data = (bfd_byte *) res_alloc (size); + + get_windres_bfd_content (&wrbfd, data, 0, size); + + flaginfo.filename = filename; + flaginfo.data = data; + flaginfo.data_end = data + size; + flaginfo.secaddr = (bfd_get_section_vma (abfd, sec) + - pe_data (abfd)->pe_opthdr.ImageBase); + + /* Now just read in the top level resource directory. Note that we + don't free data, since we create resource entries that point into + it. If we ever want to free up the resource information we read, + this will have to be cleaned up. */ + + ret = read_coff_res_dir (&wrbfd, data, &flaginfo, (const rc_res_id *) NULL, 0); + + bfd_close (abfd); + + return ret; +} + +/* Give an error if we are out of bounds. */ + +static void +overrun (const struct coff_file_info *flaginfo, const char *msg) +{ + fatal (_("%s: %s: address out of bounds"), flaginfo->filename, msg); +} + +/* Read a resource directory. */ + +static rc_res_directory * +read_coff_res_dir (windres_bfd *wrbfd, const bfd_byte *data, + const struct coff_file_info *flaginfo, + const rc_res_id *type, int level) +{ + const struct extern_res_directory *erd; + rc_res_directory *rd; + int name_count, id_count, i; + rc_res_entry **pp; + const struct extern_res_entry *ere; + + if ((size_t) (flaginfo->data_end - data) < sizeof (struct extern_res_directory)) + overrun (flaginfo, _("directory")); + + erd = (const struct extern_res_directory *) data; + + rd = (rc_res_directory *) res_alloc (sizeof (rc_res_directory)); + rd->characteristics = windres_get_32 (wrbfd, erd->characteristics, 4); + rd->time = windres_get_32 (wrbfd, erd->time, 4); + rd->major = windres_get_16 (wrbfd, erd->major, 2); + rd->minor = windres_get_16 (wrbfd, erd->minor, 2); + rd->entries = NULL; + + name_count = windres_get_16 (wrbfd, erd->name_count, 2); + id_count = windres_get_16 (wrbfd, erd->id_count, 2); + + pp = &rd->entries; + + /* The resource directory entries immediately follow the directory + table. */ + ere = (const struct extern_res_entry *) (erd + 1); + + for (i = 0; i < name_count; i++, ere++) + { + rc_uint_type name, rva; + rc_res_entry *re; + const bfd_byte *ers; + int length, j; + + if ((const bfd_byte *) ere >= flaginfo->data_end) + overrun (flaginfo, _("named directory entry")); + + name = windres_get_32 (wrbfd, ere->name, 4); + rva = windres_get_32 (wrbfd, ere->rva, 4); + + /* For some reason the high bit in NAME is set. */ + name &=~ 0x80000000; + + if (name > (rc_uint_type) (flaginfo->data_end - flaginfo->data)) + overrun (flaginfo, _("directory entry name")); + + ers = flaginfo->data + name; + + re = (rc_res_entry *) res_alloc (sizeof *re); + re->next = NULL; + re->id.named = 1; + length = windres_get_16 (wrbfd, ers, 2); + re->id.u.n.length = length; + re->id.u.n.name = (unichar *) res_alloc (length * sizeof (unichar)); + for (j = 0; j < length; j++) + re->id.u.n.name[j] = windres_get_16 (wrbfd, ers + j * 2 + 2, 2); + + if (level == 0) + type = &re->id; + + if ((rva & 0x80000000) != 0) + { + rva &=~ 0x80000000; + if (rva >= (rc_uint_type) (flaginfo->data_end - flaginfo->data)) + overrun (flaginfo, _("named subdirectory")); + re->subdir = 1; + re->u.dir = read_coff_res_dir (wrbfd, flaginfo->data + rva, flaginfo, type, + level + 1); + } + else + { + if (rva >= (rc_uint_type) (flaginfo->data_end - flaginfo->data)) + overrun (flaginfo, _("named resource")); + re->subdir = 0; + re->u.res = read_coff_data_entry (wrbfd, flaginfo->data + rva, flaginfo, type); + } + + *pp = re; + pp = &re->next; + } + + for (i = 0; i < id_count; i++, ere++) + { + unsigned long name, rva; + rc_res_entry *re; + + if ((const bfd_byte *) ere >= flaginfo->data_end) + overrun (flaginfo, _("ID directory entry")); + + name = windres_get_32 (wrbfd, ere->name, 4); + rva = windres_get_32 (wrbfd, ere->rva, 4); + + re = (rc_res_entry *) res_alloc (sizeof *re); + re->next = NULL; + re->id.named = 0; + re->id.u.id = name; + + if (level == 0) + type = &re->id; + + if ((rva & 0x80000000) != 0) + { + rva &=~ 0x80000000; + if (rva >= (rc_uint_type) (flaginfo->data_end - flaginfo->data)) + overrun (flaginfo, _("ID subdirectory")); + re->subdir = 1; + re->u.dir = read_coff_res_dir (wrbfd, flaginfo->data + rva, flaginfo, type, + level + 1); + } + else + { + if (rva >= (rc_uint_type) (flaginfo->data_end - flaginfo->data)) + overrun (flaginfo, _("ID resource")); + re->subdir = 0; + re->u.res = read_coff_data_entry (wrbfd, flaginfo->data + rva, flaginfo, type); + } + + *pp = re; + pp = &re->next; + } + + return rd; +} + +/* Read a resource data entry. */ + +static rc_res_resource * +read_coff_data_entry (windres_bfd *wrbfd, const bfd_byte *data, + const struct coff_file_info *flaginfo, + const rc_res_id *type) +{ + const struct extern_res_data *erd; + rc_res_resource *r; + rc_uint_type size, rva; + const bfd_byte *resdata; + + if (type == NULL) + fatal (_("resource type unknown")); + + if ((size_t) (flaginfo->data_end - data) < sizeof (struct extern_res_data)) + overrun (flaginfo, _("data entry")); + + erd = (const struct extern_res_data *) data; + + size = windres_get_32 (wrbfd, erd->size, 4); + rva = windres_get_32 (wrbfd, erd->rva, 4); + if (rva < flaginfo->secaddr + || rva - flaginfo->secaddr >= (rc_uint_type) (flaginfo->data_end - flaginfo->data)) + overrun (flaginfo, _("resource data")); + + resdata = flaginfo->data + (rva - flaginfo->secaddr); + + if (size > (rc_uint_type) (flaginfo->data_end - resdata)) + overrun (flaginfo, _("resource data size")); + + r = bin_to_res (wrbfd, *type, resdata, size); + + memset (&r->res_info, 0, sizeof (rc_res_res_info)); + r->coff_info.codepage = windres_get_32 (wrbfd, erd->codepage, 4); + r->coff_info.reserved = windres_get_32 (wrbfd, erd->reserved, 4); + + return r; +} + +/* This structure is used to build a list of bindata structures. */ + +struct bindata_build +{ + /* The data. */ + bindata *d; + /* The last structure we have added to the list. */ + bindata *last; + /* The size of the list as a whole. */ + unsigned long length; +}; + +struct coff_res_data_build +{ + /* The data. */ + coff_res_data *d; + /* The last structure we have added to the list. */ + coff_res_data *last; + /* The size of the list as a whole. */ + unsigned long length; +}; + +/* This structure keeps track of information as we build the directory + tree. */ + +struct coff_write_info +{ + /* These fields are based on the BFD. */ + /* The BFD itself. */ + windres_bfd *wrbfd; + /* Pointer to section symbol used to build RVA relocs. */ + asymbol **sympp; + + /* These fields are computed initially, and then not changed. */ + /* Length of directory tables and entries. */ + unsigned long dirsize; + /* Length of directory entry strings. */ + unsigned long dirstrsize; + /* Length of resource data entries. */ + unsigned long dataentsize; + + /* These fields are updated as we add data. */ + /* Directory tables and entries. */ + struct bindata_build dirs; + /* Directory entry strings. */ + struct bindata_build dirstrs; + /* Resource data entries. */ + struct bindata_build dataents; + /* Actual resource data. */ + struct coff_res_data_build resources; + /* Relocations. */ + arelent **relocs; + /* Number of relocations. */ + unsigned int reloc_count; +}; + +static void coff_bin_sizes (const rc_res_directory *, struct coff_write_info *); +static bfd_byte *coff_alloc (struct bindata_build *, rc_uint_type); +static void coff_to_bin + (const rc_res_directory *, struct coff_write_info *); +static void coff_res_to_bin + (const rc_res_resource *, struct coff_write_info *); + +/* Write resources to a COFF file. RESOURCES should already be + sorted. + + Right now we always create a new file. Someday we should also + offer the ability to merge resources into an existing file. This + would require doing the basic work of objcopy, just modifying or + adding the .rsrc section. */ + +void +write_coff_file (const char *filename, const char *target, + const rc_res_directory *resources) +{ + bfd *abfd; + asection *sec; + struct coff_write_info cwi; + windres_bfd wrbfd; + bindata *d; + coff_res_data *rd; + unsigned long length, offset; + + if (filename == NULL) + fatal (_("filename required for COFF output")); + + abfd = bfd_openw (filename, target); + if (abfd == NULL) + bfd_fatal (filename); + + if (! bfd_set_format (abfd, bfd_object)) + bfd_fatal ("bfd_set_format"); + +#if defined DLLTOOL_SH + if (! bfd_set_arch_mach (abfd, bfd_arch_sh, 0)) + bfd_fatal ("bfd_set_arch_mach(sh)"); +#elif defined DLLTOOL_MIPS + if (! bfd_set_arch_mach (abfd, bfd_arch_mips, 0)) + bfd_fatal ("bfd_set_arch_mach(mips)"); +#elif defined DLLTOOL_ARM + if (! bfd_set_arch_mach (abfd, bfd_arch_arm, 0)) + bfd_fatal ("bfd_set_arch_mach(arm)"); +#else + /* FIXME: This is obviously i386 specific. */ + if (! bfd_set_arch_mach (abfd, bfd_arch_i386, 0)) + bfd_fatal ("bfd_set_arch_mach(i386)"); +#endif + + if (! bfd_set_file_flags (abfd, HAS_SYMS | HAS_RELOC)) + bfd_fatal ("bfd_set_file_flags"); + + sec = bfd_make_section_with_flags (abfd, ".rsrc", + (SEC_HAS_CONTENTS | SEC_ALLOC + | SEC_LOAD | SEC_DATA)); + if (sec == NULL) + bfd_fatal ("bfd_make_section"); + + if (! bfd_set_symtab (abfd, sec->symbol_ptr_ptr, 1)) + bfd_fatal ("bfd_set_symtab"); + + /* Requiring this is probably a bug in BFD. */ + sec->output_section = sec; + + /* The order of data in the .rsrc section is + resource directory tables and entries + resource directory strings + resource data entries + actual resource data + + We build these different types of data in different lists. */ + + set_windres_bfd (&wrbfd, abfd, sec, WR_KIND_BFD); + + cwi.wrbfd = &wrbfd; + cwi.sympp = sec->symbol_ptr_ptr; + cwi.dirsize = 0; + cwi.dirstrsize = 0; + cwi.dataentsize = 0; + cwi.dirs.d = NULL; + cwi.dirs.last = NULL; + cwi.dirs.length = 0; + cwi.dirstrs.d = NULL; + cwi.dirstrs.last = NULL; + cwi.dirstrs.length = 0; + cwi.dataents.d = NULL; + cwi.dataents.last = NULL; + cwi.dataents.length = 0; + cwi.resources.d = NULL; + cwi.resources.last = NULL; + cwi.resources.length = 0; + cwi.relocs = NULL; + cwi.reloc_count = 0; + + /* Work out the sizes of the resource directory entries, so that we + know the various offsets we will need. */ + coff_bin_sizes (resources, &cwi); + + /* Force the directory strings to be 32 bit aligned. Every other + structure is 32 bit aligned anyhow. */ + cwi.dirstrsize = (cwi.dirstrsize + 3) &~ 3; + + /* Actually convert the resources to binary. */ + coff_to_bin (resources, &cwi); + + /* Add another 2 bytes to the directory strings if needed for + alignment. */ + if ((cwi.dirstrs.length & 3) != 0) + { + bfd_byte *ex; + + ex = coff_alloc (&cwi.dirstrs, 2); + ex[0] = 0; + ex[1] = 0; + } + + /* Make sure that the data we built came out to the same size as we + calculated initially. */ + assert (cwi.dirs.length == cwi.dirsize); + assert (cwi.dirstrs.length == cwi.dirstrsize); + assert (cwi.dataents.length == cwi.dataentsize); + + length = (cwi.dirsize + + cwi.dirstrsize + + cwi.dataentsize + + cwi.resources.length); + + if (! bfd_set_section_size (abfd, sec, length)) + bfd_fatal ("bfd_set_section_size"); + + bfd_set_reloc (abfd, sec, cwi.relocs, cwi.reloc_count); + + offset = 0; + for (d = cwi.dirs.d; d != NULL; d = d->next) + { + if (! bfd_set_section_contents (abfd, sec, d->data, offset, d->length)) + bfd_fatal ("bfd_set_section_contents"); + offset += d->length; + } + for (d = cwi.dirstrs.d; d != NULL; d = d->next) + { + set_windres_bfd_content (&wrbfd, d->data, offset, d->length); + offset += d->length; + } + for (d = cwi.dataents.d; d != NULL; d = d->next) + { + set_windres_bfd_content (&wrbfd, d->data, offset, d->length); + offset += d->length; + } + for (rd = cwi.resources.d; rd != NULL; rd = rd->next) + { + res_to_bin (cwi.wrbfd, (rc_uint_type) offset, rd->res); + offset += rd->length; + } + + assert (offset == length); + + if (! bfd_close (abfd)) + bfd_fatal ("bfd_close"); + + /* We allocated the relocs array using malloc. */ + free (cwi.relocs); +} + +/* Work out the sizes of the various fixed size resource directory + entries. This updates fields in CWI. */ + +static void +coff_bin_sizes (const rc_res_directory *resdir, + struct coff_write_info *cwi) +{ + const rc_res_entry *re; + + cwi->dirsize += sizeof (struct extern_res_directory); + + for (re = resdir->entries; re != NULL; re = re->next) + { + cwi->dirsize += sizeof (struct extern_res_entry); + + if (re->id.named) + cwi->dirstrsize += re->id.u.n.length * 2 + 2; + + if (re->subdir) + coff_bin_sizes (re->u.dir, cwi); + else + cwi->dataentsize += sizeof (struct extern_res_data); + } +} + +/* Allocate data for a particular list. */ + +static bfd_byte * +coff_alloc (struct bindata_build *bb, rc_uint_type size) +{ + bindata *d; + + d = (bindata *) reswr_alloc (sizeof (bindata)); + + d->next = NULL; + d->data = (bfd_byte *) reswr_alloc (size); + d->length = size; + + if (bb->d == NULL) + bb->d = d; + else + bb->last->next = d; + bb->last = d; + bb->length += size; + + return d->data; +} + +/* Convert the resource directory RESDIR to binary. */ + +static void +coff_to_bin (const rc_res_directory *resdir, struct coff_write_info *cwi) +{ + struct extern_res_directory *erd; + int ci, cn; + const rc_res_entry *e; + struct extern_res_entry *ere; + + /* Write out the directory table. */ + + erd = ((struct extern_res_directory *) + coff_alloc (&cwi->dirs, sizeof (*erd))); + + windres_put_32 (cwi->wrbfd, erd->characteristics, resdir->characteristics); + windres_put_32 (cwi->wrbfd, erd->time, resdir->time); + windres_put_16 (cwi->wrbfd, erd->major, resdir->major); + windres_put_16 (cwi->wrbfd, erd->minor, resdir->minor); + + ci = 0; + cn = 0; + for (e = resdir->entries; e != NULL; e = e->next) + { + if (e->id.named) + ++cn; + else + ++ci; + } + + windres_put_16 (cwi->wrbfd, erd->name_count, cn); + windres_put_16 (cwi->wrbfd, erd->id_count, ci); + + /* Write out the data entries. Note that we allocate space for all + the entries before writing them out. That permits a recursive + call to work correctly when writing out subdirectories. */ + + ere = ((struct extern_res_entry *) + coff_alloc (&cwi->dirs, (ci + cn) * sizeof (*ere))); + for (e = resdir->entries; e != NULL; e = e->next, ere++) + { + if (! e->id.named) + windres_put_32 (cwi->wrbfd, ere->name, e->id.u.id); + else + { + bfd_byte *str; + rc_uint_type i; + + /* For some reason existing files seem to have the high bit + set on the address of the name, although that is not + documented. */ + windres_put_32 (cwi->wrbfd, ere->name, + 0x80000000 | (cwi->dirsize + cwi->dirstrs.length)); + + str = coff_alloc (&cwi->dirstrs, e->id.u.n.length * 2 + 2); + windres_put_16 (cwi->wrbfd, str, e->id.u.n.length); + for (i = 0; i < e->id.u.n.length; i++) + windres_put_16 (cwi->wrbfd, str + (i + 1) * sizeof (unichar), e->id.u.n.name[i]); + } + + if (e->subdir) + { + windres_put_32 (cwi->wrbfd, ere->rva, 0x80000000 | cwi->dirs.length); + coff_to_bin (e->u.dir, cwi); + } + else + { + windres_put_32 (cwi->wrbfd, ere->rva, + cwi->dirsize + cwi->dirstrsize + cwi->dataents.length); + + coff_res_to_bin (e->u.res, cwi); + } + } +} + +/* Convert the resource RES to binary. */ + +static void +coff_res_to_bin (const rc_res_resource *res, struct coff_write_info *cwi) +{ + arelent *r; + struct extern_res_data *erd; + coff_res_data *d; + + /* For some reason, although every other address is a section + offset, the address of the resource data itself is an RVA. That + means that we need to generate a relocation for it. We allocate + the relocs array using malloc so that we can use realloc. FIXME: + This relocation handling is correct for the i386, but probably + not for any other target. */ + + r = (arelent *) reswr_alloc (sizeof (arelent)); + r->sym_ptr_ptr = cwi->sympp; + r->address = cwi->dirsize + cwi->dirstrsize + cwi->dataents.length; + r->addend = 0; + r->howto = bfd_reloc_type_lookup (WR_BFD (cwi->wrbfd), BFD_RELOC_RVA); + if (r->howto == NULL) + bfd_fatal (_("can't get BFD_RELOC_RVA relocation type")); + + cwi->relocs = xrealloc (cwi->relocs, + (cwi->reloc_count + 2) * sizeof (arelent *)); + cwi->relocs[cwi->reloc_count] = r; + cwi->relocs[cwi->reloc_count + 1] = NULL; + ++cwi->reloc_count; + + erd = (struct extern_res_data *) coff_alloc (&cwi->dataents, sizeof (*erd)); + + windres_put_32 (cwi->wrbfd, erd->rva, + (cwi->dirsize + + cwi->dirstrsize + + cwi->dataentsize + + cwi->resources.length)); + windres_put_32 (cwi->wrbfd, erd->codepage, res->coff_info.codepage); + windres_put_32 (cwi->wrbfd, erd->reserved, res->coff_info.reserved); + + d = (coff_res_data *) reswr_alloc (sizeof (coff_res_data)); + d->length = res_to_bin (NULL, (rc_uint_type) 0, res); + d->res = res; + d->next = NULL; + + if (cwi->resources.d == NULL) + cwi->resources.d = d; + else + cwi->resources.last->next = d; + + cwi->resources.last = d; + cwi->resources.length += (d->length + 3) & ~3; + + windres_put_32 (cwi->wrbfd, erd->size, d->length); + + /* Force the next resource to have 32 bit alignment. */ + d->length = (d->length + 3) & ~3; +} |