--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/elf4rom/libs/libelf-0.8.10/lib/opt.delscn.c Fri Jan 15 09:07:44 2010 +0000
@@ -0,0 +1,205 @@
+/*
+opt.delscn.c - implementation of the elf_delscn(3) function.
+Copyright (C) 1995 - 2001 Michael Riepe
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+This library 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+#include <private.h>
+
+#ifndef lint
+static const char rcsid[] = "@(#) $Id: opt.delscn.c,v 1.11 2005/05/21 15:39:25 michael Exp $";
+#endif /* lint */
+
+static size_t
+_newindex(size_t old, size_t index) {
+ return old == index ? SHN_UNDEF : (old > index ? old - 1 : old);
+}
+
+static void
+_elf32_update_shdr(Elf *elf, size_t index) {
+ Elf32_Shdr *shdr;
+ Elf_Scn *scn;
+
+ ((Elf32_Ehdr*)elf->e_ehdr)->e_shnum = elf->e_scn_n->s_index + 1;
+ for (scn = elf->e_scn_1; scn; scn = scn->s_link) {
+ shdr = &scn->s_shdr32;
+ switch (shdr->sh_type) {
+ case SHT_REL:
+ case SHT_RELA:
+ shdr->sh_info = _newindex(shdr->sh_info, index);
+ /* fall through */
+ case SHT_DYNSYM:
+ case SHT_DYNAMIC:
+ case SHT_HASH:
+ case SHT_SYMTAB:
+#if __LIBELF_SYMBOL_VERSIONS
+#if __LIBELF_SUN_SYMBOL_VERSIONS
+ case SHT_SUNW_verdef:
+ case SHT_SUNW_verneed:
+ case SHT_SUNW_versym:
+#else /* __LIBELF_SUN_SYMBOL_VERSIONS */
+ case SHT_GNU_verdef:
+ case SHT_GNU_verneed:
+ case SHT_GNU_versym:
+#endif /* __LIBELF_SUN_SYMBOL_VERSIONS */
+#endif /* __LIBELF_SYMBOL_VERSIONS */
+ shdr->sh_link = _newindex(shdr->sh_link, index);
+ /* fall through */
+ default:
+ break;
+ }
+ }
+}
+
+#if __LIBELF64
+
+static void
+_elf64_update_shdr(Elf *elf, size_t index) {
+ Elf64_Shdr *shdr;
+ Elf_Scn *scn;
+
+ ((Elf64_Ehdr*)elf->e_ehdr)->e_shnum = elf->e_scn_n->s_index + 1;
+ for (scn = elf->e_scn_1; scn; scn = scn->s_link) {
+ shdr = &scn->s_shdr64;
+ switch (shdr->sh_type) {
+ case SHT_REL:
+ case SHT_RELA:
+ shdr->sh_info = _newindex(shdr->sh_info, index);
+ /* fall through */
+ case SHT_DYNSYM:
+ case SHT_DYNAMIC:
+ case SHT_HASH:
+ case SHT_SYMTAB:
+#if __LIBELF_SYMBOL_VERSIONS
+#if __LIBELF_SUN_SYMBOL_VERSIONS
+ case SHT_SUNW_verdef:
+ case SHT_SUNW_verneed:
+ case SHT_SUNW_versym:
+#else /* __LIBELF_SUN_SYMBOL_VERSIONS */
+ case SHT_GNU_verdef:
+ case SHT_GNU_verneed:
+ case SHT_GNU_versym:
+#endif /* __LIBELF_SUN_SYMBOL_VERSIONS */
+#endif /* __LIBELF_SYMBOL_VERSIONS */
+ shdr->sh_link = _newindex(shdr->sh_link, index);
+ /* fall through */
+ default:
+ break;
+ }
+ }
+}
+
+#endif /* __LIBELF64 */
+
+size_t
+elf_delscn(Elf *elf, Elf_Scn *scn) {
+ Elf_Scn *pscn;
+ Scn_Data *sd;
+ Scn_Data *tmp;
+ size_t index;
+
+ if (!elf || !scn) {
+ return SHN_UNDEF;
+ }
+ elf_assert(elf->e_magic == ELF_MAGIC);
+ elf_assert(scn->s_magic == SCN_MAGIC);
+ elf_assert(elf->e_ehdr);
+ if (scn->s_elf != elf) {
+ seterr(ERROR_ELFSCNMISMATCH);
+ return SHN_UNDEF;
+ }
+ elf_assert(elf->e_scn_1);
+ if (scn == elf->e_scn_1) {
+ seterr(ERROR_NULLSCN);
+ return SHN_UNDEF;
+ }
+
+ /*
+ * Find previous section.
+ */
+ for (pscn = elf->e_scn_1; pscn->s_link; pscn = pscn->s_link) {
+ if (pscn->s_link == scn) {
+ break;
+ }
+ }
+ if (pscn->s_link != scn) {
+ seterr(ERROR_ELFSCNMISMATCH);
+ return SHN_UNDEF;
+ }
+ /*
+ * Unlink section.
+ */
+ if (elf->e_scn_n == scn) {
+ elf->e_scn_n = pscn;
+ }
+ pscn->s_link = scn->s_link;
+ index = scn->s_index;
+ /*
+ * Free section descriptor and data.
+ */
+ for (sd = scn->s_data_1; sd; sd = tmp) {
+ elf_assert(sd->sd_magic == DATA_MAGIC);
+ elf_assert(sd->sd_scn == scn);
+ tmp = sd->sd_link;
+ if (sd->sd_free_data && sd->sd_memdata) {
+ free(sd->sd_memdata);
+ }
+ if (sd->sd_freeme) {
+ free(sd);
+ }
+ }
+ if ((sd = scn->s_rawdata)) {
+ elf_assert(sd->sd_magic == DATA_MAGIC);
+ elf_assert(sd->sd_scn == scn);
+ if (sd->sd_free_data && sd->sd_memdata) {
+ free(sd->sd_memdata);
+ }
+ if (sd->sd_freeme) {
+ free(sd);
+ }
+ }
+ if (scn->s_freeme) {
+ elf_assert(scn->s_index > 0);
+ free(scn);
+ }
+ /*
+ * Adjust section indices.
+ */
+ for (scn = pscn->s_link; scn; scn = scn->s_link) {
+ elf_assert(scn->s_index > index);
+ scn->s_index--;
+ }
+ /*
+ * Adjust ELF header and well-known section headers.
+ */
+ if (elf->e_class == ELFCLASS32) {
+ _elf32_update_shdr(elf, index);
+ return index;
+ }
+#if __LIBELF64
+ else if (elf->e_class == ELFCLASS64) {
+ _elf64_update_shdr(elf, index);
+ return index;
+ }
+#endif /* __LIBELF64 */
+ else if (valid_class(elf->e_class)) {
+ seterr(ERROR_UNIMPLEMENTED);
+ }
+ else {
+ seterr(ERROR_UNKNOWN_CLASS);
+ }
+ return SHN_UNDEF;
+}