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# This shell script emits a C file. -*- C -*-
# Copyright (C) 2012-2019 Free Software Foundation, Inc.
# Contributed by Andes Technology Corporation.
#
# 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.
#
fragment <<EOF
#include "elf-bfd.h"
#include "elf/nds32.h"
#include "bfd_stdint.h"
#include "elf32-nds32.h"
static int relax_fp_as_gp = 1; /* --mrelax-omit-fp */
static int eliminate_gc_relocs = 0; /* --meliminate-gc-relocs */
static FILE *sym_ld_script = NULL; /* --mgen-symbol-ld-script=<file> */
static int hyper_relax = 1; /* --mhyper-relax */
static int tls_desc_trampoline = 0; /* --m[no]tlsdesc-trampoline. */
/* Disable if linking a dynamically linked executable. */
static int load_store_relax = 1;
/* Save the target options into output bfd to avoid using to many global
variables. Do this after the output has been created, but before
inputs are read. */
static void
nds32_elf_create_output_section_statements (void)
{
if (strstr (bfd_get_target (link_info.output_bfd), "nds32") == NULL)
{
/* Check the output target is nds32. */
einfo (_("%F%P: error: cannot change output format whilst "
"linking %s binaries\n"), "NDS32");
return;
}
bfd_elf32_nds32_set_target_option (&link_info,
relax_fp_as_gp,
eliminate_gc_relocs,
sym_ld_script,
hyper_relax,
tls_desc_trampoline,
load_store_relax);
}
static void
nds32_elf_after_parse (void)
{
if (bfd_link_relocatable (&link_info)
|| bfd_link_pic (&link_info))
DISABLE_RELAXATION;
if (!RELAXATION_ENABLED)
relax_fp_as_gp = 0;
gld${EMULATION_NAME}_after_parse ();
}
static void
nds32_elf_after_open (void)
{
unsigned int arch_ver = (unsigned int)-1;
unsigned int abi_ver = (unsigned int)-1;
bfd *abfd;
/* For now, make sure all object files are of the same architecture.
We may try to merge object files with different architecture together. */
for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link.next)
{
if (arch_ver == (unsigned int)-1 && E_N1_ARCH != (elf_elfheader (abfd)->e_flags & EF_NDS_ARCH))
arch_ver = elf_elfheader (abfd)->e_flags & EF_NDS_ARCH ;
if (abi_ver == (unsigned int)-1)
{
/* Initialize ABI version, if not ABI0.
(OS uses empty file to create empty ELF with ABI0). */
if ((elf_elfheader (abfd)->e_flags & EF_NDS_ABI) != 0)
abi_ver = elf_elfheader (abfd)->e_flags & EF_NDS_ABI ;
}
else if ((elf_elfheader (abfd)->e_flags & EF_NDS_ABI) != 0
&& abi_ver != (elf_elfheader (abfd)->e_flags & EF_NDS_ABI))
{
/* Incompatible objects. */
einfo (_("%F%P: %pB: ABI version of object files mismatched\n"),
abfd);
}
}
/* Check object files if the target is dynamic linked executable
or shared object. */
if (elf_hash_table (&link_info)->dynamic_sections_created
|| bfd_link_pic (&link_info)
|| bfd_link_pie (&link_info))
{
/* Dynamic linked executable with SDA and non-PIC.
Turn off load/store relaxtion. */
/* This may support in the future. */
load_store_relax = 0 ;
relax_fp_as_gp = 0;
}
/* Call the standard elf routine. */
gld${EMULATION_NAME}_after_open ();
}
static void
nds32_elf_after_allocation (void)
{
/* Call default after allocation callback.
1. This is where relaxation is done.
2. It calls gld${EMULATION_NAME}_map_segments to build ELF segment table.
3. Any relaxation requires relax being done must be called after it. */
gld${EMULATION_NAME}_after_allocation ();
}
EOF
# Define some shell vars to insert bits of code into the standard elf
# parse_args and list_options functions.
#
PARSE_AND_LIST_PROLOGUE='
#define OPTION_BASELINE 301
#define OPTION_ELIM_GC_RELOCS (OPTION_BASELINE + 1)
#define OPTION_FP_AS_GP (OPTION_BASELINE + 2)
#define OPTION_NO_FP_AS_GP (OPTION_BASELINE + 3)
#define OPTION_REDUCE_FP_UPDATE (OPTION_BASELINE + 4)
#define OPTION_NO_REDUCE_FP_UPDATE (OPTION_BASELINE + 5)
#define OPTION_EXPORT_SYMBOLS (OPTION_BASELINE + 6)
#define OPTION_HYPER_RELAX (OPTION_BASELINE + 7)
#define OPTION_TLSDESC_TRAMPOLINE (OPTION_BASELINE + 8)
#define OPTION_NO_TLSDESC_TRAMPOLINE (OPTION_BASELINE + 9)
'
PARSE_AND_LIST_LONGOPTS='
{ "mfp-as-gp", no_argument, NULL, OPTION_FP_AS_GP},
{ "mno-fp-as-gp", no_argument, NULL, OPTION_NO_FP_AS_GP},
{ "mexport-symbols", required_argument, NULL, OPTION_EXPORT_SYMBOLS},
{ "mhyper-relax", required_argument, NULL, OPTION_HYPER_RELAX},
{ "mtlsdesc-trampoline", no_argument, NULL, OPTION_TLSDESC_TRAMPOLINE},
{ "mno-tlsdesc-trampoline", no_argument, NULL, OPTION_NO_TLSDESC_TRAMPOLINE},
/* These are deprecated options. Remove them in the future. */
{ "mrelax-reduce-fp-update", no_argument, NULL, OPTION_REDUCE_FP_UPDATE},
{ "mrelax-no-reduce-fp-update", no_argument, NULL, OPTION_NO_REDUCE_FP_UPDATE},
{ "mbaseline", required_argument, NULL, OPTION_BASELINE},
{ "meliminate-gc-relocs", no_argument, NULL, OPTION_ELIM_GC_RELOCS},
{ "mrelax-omit-fp", no_argument, NULL, OPTION_FP_AS_GP},
{ "mrelax-no-omit-fp", no_argument, NULL, OPTION_NO_FP_AS_GP},
{ "mgen-symbol-ld-script", required_argument, NULL, OPTION_EXPORT_SYMBOLS},
'
PARSE_AND_LIST_OPTIONS='
fprintf (file, _("\
--m[no-]fp-as-gp Disable/enable fp-as-gp relaxation\n"));
fprintf (file, _("\
--mexport-symbols=FILE Exporting symbols in linker script\n"));
fprintf (file, _("\
--mhyper-relax=level Adjust relax level (low|medium|high). default: medium\n"));
fprintf (file, _("\
--m[no-]tlsdesc-trampoline Disable/enable TLS DESC trampoline\n"));
'
PARSE_AND_LIST_ARGS_CASES='
case OPTION_BASELINE:
einfo (_("%P: --mbaseline is not used anymore\n"));
break;
case OPTION_ELIM_GC_RELOCS:
eliminate_gc_relocs = 1;
break;
case OPTION_FP_AS_GP:
case OPTION_NO_FP_AS_GP:
relax_fp_as_gp = (optc == OPTION_FP_AS_GP);
break;
case OPTION_REDUCE_FP_UPDATE:
case OPTION_NO_REDUCE_FP_UPDATE:
einfo (_("%P: --relax-[no-]reduce-fp-updat is not used anymore\n"));
break;
case OPTION_EXPORT_SYMBOLS:
if (!optarg)
einfo (_("%P: missing file for --mexport-symbols\n"), optarg);
if(strcmp (optarg, "-") == 0)
sym_ld_script = stdout;
else
{
sym_ld_script = fopen (optarg, FOPEN_WT);
if(sym_ld_script == NULL)
einfo (_("%F%P: cannot open map file %s: %E\n"), optarg);
}
break;
case OPTION_HYPER_RELAX:
if (!optarg)
einfo (_("%P: valid arguments to --mhyper-relax=(low|medium|high)\n"));
if (strcmp (optarg, "low") == 0)
hyper_relax = 0;
else if (strcmp (optarg, "medium") == 0)
hyper_relax = 1;
else if (strcmp (optarg, "high") == 0)
hyper_relax = 2;
else
einfo (_("%P: valid arguments to --mhyper-relax=(low|medium|high)\n"));
break;
case OPTION_TLSDESC_TRAMPOLINE:
tls_desc_trampoline = 1;
break;
case OPTION_NO_TLSDESC_TRAMPOLINE:
tls_desc_trampoline = 0;
break;
'
LDEMUL_AFTER_OPEN=nds32_elf_after_open
LDEMUL_AFTER_PARSE=nds32_elf_after_parse
LDEMUL_AFTER_ALLOCATION=nds32_elf_after_allocation
LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=nds32_elf_create_output_section_statements
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