diff options
Diffstat (limited to 'binutils-2.21/ld/emultempl/solaris2.em')
| -rw-r--r-- | binutils-2.21/ld/emultempl/solaris2.em | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/binutils-2.21/ld/emultempl/solaris2.em b/binutils-2.21/ld/emultempl/solaris2.em new file mode 100644 index 0000000..0b77375 --- /dev/null +++ b/binutils-2.21/ld/emultempl/solaris2.em @@ -0,0 +1,154 @@ +# This shell script emits a C file. -*- C -*- +# It does some substitutions. +if [ -z "$MACHINE" ]; then + OUTPUT_ARCH=${ARCH} +else + OUTPUT_ARCH=${ARCH}:${MACHINE} +fi +fragment <<EOF +/* This file is generated by a shell script. DO NOT EDIT! */ + +/* Solaris 2 emulation code for ${EMULATION_NAME} + Copyright 2010 Free Software Foundation, Inc. + Written by Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE> + + This file is part of the GNU Binutils. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ + +#define TARGET_IS_${EMULATION_NAME} + +/* The Solaris 2 ABI requires some global symbols to be present in the + .dynsym table of executables and shared objects. If generating a + versioned shared object, they must always be bound to the base version. + + Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output + File, p.63. */ +static void +elf_solaris2_before_allocation (void) +{ + /* Global symbols required by the Solaris 2 ABI. */ + static const char *global_syms[] = { + "_DYNAMIC", + "_GLOBAL_OFFSET_TABLE_", + "_PROCEDURE_LINKAGE_TABLE_", + "_edata", + "_end", + "_etext", + NULL + }; + const char **sym; + + /* Do this for both executables and shared objects. */ + if (!link_info.relocatable) + { + for (sym = global_syms; *sym != NULL; sym++) + { + struct elf_link_hash_entry *h; + + /* Lookup symbol. */ + h = elf_link_hash_lookup (elf_hash_table (&link_info), *sym, + FALSE, FALSE, FALSE); + if (h == NULL) + continue; + + /* Undo the hiding done by _bfd_elf_define_linkage_sym. */ + h->forced_local = 0; + h->other &= ~STV_HIDDEN; + + /* Emit it into the .dynamic section, too. */ + bfd_elf_link_record_dynamic_symbol (&link_info, h); + } + } + + /* Only do this if emitting a shared object and versioning is in place. */ + if (link_info.shared + && (lang_elf_version_info != NULL || link_info.create_default_symver)) + { + struct bfd_elf_version_expr *globals = NULL, *locals = NULL; + struct bfd_elf_version_tree *basever; + const char *soname; + + for (sym = global_syms; *sym != NULL; sym++) + { + /* Create a version pattern for this symbol. Some of them start + off as local, others as global, so try both. */ + globals = lang_new_vers_pattern (globals, *sym, NULL, TRUE); + locals = lang_new_vers_pattern (locals, *sym, NULL, TRUE); + } + + /* New version node for those symbols. */ + basever = lang_new_vers_node (globals, locals); + + /* The version name matches what bfd_elf_size_dynamic_sections uses + for the base version. */ + soname = bfd_elf_get_dt_soname (link_info.output_bfd); + if (soname == NULL) + soname = lbasename (bfd_get_filename (link_info.output_bfd)); + + /* Register the node. */ + lang_register_vers_node (soname, basever, NULL); + /* Enforce base version. The encoded vd_ndx is vernum + 1. */ + basever->vernum = 0; + } + + gld${EMULATION_NAME}_before_allocation (); +} + +/* The Solaris 2 ABI requires two local symbols to be emitted for every + executable and shared object. + + Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output + File, p.63. */ +static void +elf_solaris2_after_allocation (void) +{ + /* Local symbols required by the Solaris 2 ABI. Already emitted by + emulparams/solaris2.sh. */ + static const char *local_syms[] = { + "_START_", + "_END_", + NULL + }; + const char **sym; + + /* Do this for both executables and shared objects. */ + if (!link_info.relocatable) + { + for (sym = local_syms; *sym != NULL; sym++) + { + struct elf_link_hash_entry *h; + + /* Lookup symbol. */ + h = elf_link_hash_lookup (elf_hash_table (&link_info), *sym, + FALSE, FALSE, FALSE); + if (h == NULL) + continue; + + /* Turn it local. */ + h->forced_local = 1; + /* Type should be STT_OBJECT, not STT_NOTYPE. */ + h->type = STT_OBJECT; + } + } + + gld${EMULATION_NAME}_after_allocation (); +} + +EOF + +LDEMUL_BEFORE_ALLOCATION=elf_solaris2_before_allocation +LDEMUL_AFTER_ALLOCATION=elf_solaris2_after_allocation |