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author | Jing Yu <jingyu@google.com> | 2011-12-20 10:27:58 -0800 |
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committer | Jing Yu <jingyu@google.com> | 2011-12-20 10:27:58 -0800 |
commit | cf3cdbf8b3cda61a619299e7966a83df66244036 (patch) | |
tree | 201e2bcfc955f16802d3257112d29736cb3a3ce8 /binutils-2.21/ld/emultempl/cr16elf.em | |
parent | e4df3e0a5bb640ccfa2f30ee67fe9b3146b152d6 (diff) | |
download | toolchain_binutils-cf3cdbf8b3cda61a619299e7966a83df66244036.zip toolchain_binutils-cf3cdbf8b3cda61a619299e7966a83df66244036.tar.gz toolchain_binutils-cf3cdbf8b3cda61a619299e7966a83df66244036.tar.bz2 |
Add binutils-2.21.
Use --enable-gold=default for dual linker support.
Change-Id: Id1a744c7db58a0b5e7a3be174cdfa875f2f86e49
Diffstat (limited to 'binutils-2.21/ld/emultempl/cr16elf.em')
-rw-r--r-- | binutils-2.21/ld/emultempl/cr16elf.em | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/binutils-2.21/ld/emultempl/cr16elf.em b/binutils-2.21/ld/emultempl/cr16elf.em new file mode 100644 index 0000000..9850bda --- /dev/null +++ b/binutils-2.21/ld/emultempl/cr16elf.em @@ -0,0 +1,183 @@ +# This shell script emits a C file. -*- C -*- +# Copyright 2007, 2008, 2009 Free Software Foundation, Inc. +# Contributed by M R Swami Reddy <MR.Swami.Reddy@nsc.com> +# +# 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. +# + +# This file is sourced from elf32.em, and defines extra cr16-elf +# specific routines. +# +fragment <<EOF + +#include "ldctor.h" + +static void check_sections (bfd *, asection *, void *); + + +/* This function is run after all the input files have been opened. */ + +static void +cr16_elf_after_open (void) +{ + /* Call the standard elf routine. */ + gld${EMULATION_NAME}_after_open (); + + if (command_line.embedded_relocs + && (! link_info.relocatable)) + { + bfd *abfd; + + /* In the embedded relocs mode we create a .emreloc section for each + input file with a nonzero .data section. The BFD backend will fill in + these sections with magic numbers which can be used to relocate the + data section at run time. */ + for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next) + { + asection *datasec; + + /* As first-order business, make sure that each input BFD is either + COFF or ELF. We need to call a special BFD backend function to + generate the embedded relocs, and we have such functions only for + COFF and ELF. */ + if (bfd_get_flavour (abfd) != bfd_target_coff_flavour + && bfd_get_flavour (abfd) != bfd_target_elf_flavour) + einfo ("%F%B: all input objects must be COFF or ELF for --embedded-relocs\n"); + + datasec = bfd_get_section_by_name (abfd, ".data.rel"); + + /* Note that we assume that the reloc_count field has already + been set up. We could call bfd_get_reloc_upper_bound, but + that returns the size of a memory buffer rather than a reloc + count. We do not want to call bfd_canonicalize_reloc, + because although it would always work it would force us to + read in the relocs into BFD canonical form, which would waste + a significant amount of time and memory. */ + if (datasec != NULL && datasec->reloc_count > 0) + { + asection *relsec; + + relsec = bfd_make_section (abfd, ".emreloc"); + if (relsec == NULL + || ! bfd_set_section_flags (abfd, relsec, + (SEC_ALLOC + | SEC_LOAD + | SEC_HAS_CONTENTS + | SEC_IN_MEMORY)) + || ! bfd_set_section_alignment (abfd, relsec, 2) + || ! bfd_set_section_size (abfd, relsec, + datasec->reloc_count * 8)) + einfo ("%F%B: can not create .emreloc section: %E\n"); + } + + /* Double check that all other data sections are empty, as is + required for embedded PIC code. */ + bfd_map_over_sections (abfd, check_sections, datasec); + } + } +} + +/* Check that of the data sections, only the .data section has + relocs. This is called via bfd_map_over_sections. */ + +static void +check_sections (bfd *abfd, asection *sec, void *datasec) +{ + if ((strncmp (bfd_get_section_name (abfd, sec), ".data.rel", 9) == 0) + && sec != datasec + && sec->reloc_count == 0 ) + einfo ("%B%X: section %s has relocs; can not use --embedded-relocs\n", + abfd, bfd_get_section_name (abfd, sec)); +} + +static void +cr16elf_after_parse (void) +{ + /* Always behave as if called with --sort-common command line + option. + This is to emulate the CRTools' method of keeping variables + of different alignment in separate sections. */ + config.sort_common = TRUE; + + /* Don't create a demand-paged executable, since this feature isn't + meaninful in CR16 embedded systems. Moreover, when magic_demand_paged + is true the link sometimes fails. */ + config.magic_demand_paged = FALSE; + + after_parse_default (); +} + +/* This is called after the sections have been attached to output + sections, but before any sizes or addresses have been set. */ + +static void +cr16elf_before_allocation (void) +{ + /* Call the default first. */ + gld${EMULATION_NAME}_before_allocation (); + + if (command_line.embedded_relocs + && (! link_info.relocatable)) + { + + bfd *abfd; + + /* If we are generating embedded relocs, call a special BFD backend + routine to do the work. */ + for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next) + { + asection *datasec, *relsec; + char *errmsg; + + datasec = bfd_get_section_by_name (abfd, ".data.rel"); + + if (datasec == NULL || datasec->reloc_count == 0) + continue; + + relsec = bfd_get_section_by_name (abfd, ".emreloc"); + ASSERT (relsec != NULL); + + if (! bfd_cr16_elf32_create_embedded_relocs (abfd, &link_info, + datasec, relsec, + &errmsg)) + { + if (errmsg == NULL) + einfo ("%B%X: can not create runtime reloc information: %E\n", + abfd); + else + einfo ("%X%B: can not create runtime reloc information: %s\n", + abfd, errmsg); + } + } + } + + /* Enable relaxation by default if the "--no-relax" option was not + specified. This is done here instead of in the before_parse hook + because there is a check in main() to prohibit use of --relax and + -r together. */ + if (RELAXATION_DISABLED_BY_DEFAULT) + ENABLE_RELAXATION; +} + +EOF + +# Put these extra cr16-elf routines in ld_${EMULATION_NAME}_emulation +# +LDEMUL_AFTER_OPEN=cr16_elf_after_open +LDEMUL_AFTER_PARSE=cr16elf_after_parse +LDEMUL_BEFORE_ALLOCATION=cr16elf_before_allocation |