| 1 | # This shell script emits a C file. -*- C -*- |
| 2 | # Copyright (C) 2012-2020 Free Software Foundation, Inc. |
| 3 | # Contributed by Andes Technology Corporation. |
| 4 | # |
| 5 | # This file is part of the GNU Binutils. |
| 6 | # |
| 7 | # This program is free software; you can redistribute it and/or modify |
| 8 | # it under the terms of the GNU General Public License as published by |
| 9 | # the Free Software Foundation; either version 3 of the License, or |
| 10 | # (at your option) any later version. |
| 11 | # |
| 12 | # This program is distributed in the hope that it will be useful, |
| 13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | # GNU General Public License for more details. |
| 16 | # |
| 17 | # You should have received a copy of the GNU General Public License |
| 18 | # along with this program; if not, write to the Free Software |
| 19 | # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 20 | # MA 02110-1301, USA. |
| 21 | # |
| 22 | |
| 23 | fragment <<EOF |
| 24 | |
| 25 | #include "elf-bfd.h" |
| 26 | #include "elf/nds32.h" |
| 27 | #include "bfd_stdint.h" |
| 28 | #include "elf32-nds32.h" |
| 29 | |
| 30 | static int relax_fp_as_gp = 1; /* --mrelax-omit-fp */ |
| 31 | static int eliminate_gc_relocs = 0; /* --meliminate-gc-relocs */ |
| 32 | static FILE *sym_ld_script = NULL; /* --mgen-symbol-ld-script=<file> */ |
| 33 | static int hyper_relax = 1; /* --mhyper-relax */ |
| 34 | static int tls_desc_trampoline = 0; /* --m[no]tlsdesc-trampoline. */ |
| 35 | /* Disable if linking a dynamically linked executable. */ |
| 36 | static int load_store_relax = 1; |
| 37 | |
| 38 | /* Save the target options into output bfd to avoid using to many global |
| 39 | variables. Do this after the output has been created, but before |
| 40 | inputs are read. */ |
| 41 | static void |
| 42 | nds32_elf_create_output_section_statements (void) |
| 43 | { |
| 44 | if (strstr (bfd_get_target (link_info.output_bfd), "nds32") == NULL) |
| 45 | { |
| 46 | /* Check the output target is nds32. */ |
| 47 | einfo (_("%F%P: error: cannot change output format whilst " |
| 48 | "linking %s binaries\n"), "NDS32"); |
| 49 | return; |
| 50 | } |
| 51 | |
| 52 | bfd_elf32_nds32_set_target_option (&link_info, |
| 53 | relax_fp_as_gp, |
| 54 | eliminate_gc_relocs, |
| 55 | sym_ld_script, |
| 56 | hyper_relax, |
| 57 | tls_desc_trampoline, |
| 58 | load_store_relax); |
| 59 | } |
| 60 | |
| 61 | static void |
| 62 | nds32_elf_after_parse (void) |
| 63 | { |
| 64 | if (bfd_link_relocatable (&link_info) |
| 65 | || bfd_link_pic (&link_info)) |
| 66 | DISABLE_RELAXATION; |
| 67 | |
| 68 | if (!RELAXATION_ENABLED) |
| 69 | relax_fp_as_gp = 0; |
| 70 | |
| 71 | ldelf_after_parse (); |
| 72 | } |
| 73 | |
| 74 | static void |
| 75 | nds32_elf_after_open (void) |
| 76 | { |
| 77 | unsigned int arch_ver = (unsigned int)-1; |
| 78 | unsigned int abi_ver = (unsigned int)-1; |
| 79 | bfd *abfd; |
| 80 | |
| 81 | /* For now, make sure all object files are of the same architecture. |
| 82 | We may try to merge object files with different architecture together. */ |
| 83 | for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link.next) |
| 84 | { |
| 85 | if (arch_ver == (unsigned int)-1 && E_N1_ARCH != (elf_elfheader (abfd)->e_flags & EF_NDS_ARCH)) |
| 86 | arch_ver = elf_elfheader (abfd)->e_flags & EF_NDS_ARCH ; |
| 87 | |
| 88 | if (abi_ver == (unsigned int)-1) |
| 89 | { |
| 90 | /* Initialize ABI version, if not ABI0. |
| 91 | (OS uses empty file to create empty ELF with ABI0). */ |
| 92 | if ((elf_elfheader (abfd)->e_flags & EF_NDS_ABI) != 0) |
| 93 | abi_ver = elf_elfheader (abfd)->e_flags & EF_NDS_ABI ; |
| 94 | } |
| 95 | else if ((elf_elfheader (abfd)->e_flags & EF_NDS_ABI) != 0 |
| 96 | && abi_ver != (elf_elfheader (abfd)->e_flags & EF_NDS_ABI)) |
| 97 | { |
| 98 | /* Incompatible objects. */ |
| 99 | einfo (_("%F%P: %pB: ABI version of object files mismatched\n"), |
| 100 | abfd); |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | /* Check object files if the target is dynamic linked executable |
| 105 | or shared object. */ |
| 106 | if (elf_hash_table (&link_info)->dynamic_sections_created |
| 107 | || bfd_link_pic (&link_info) |
| 108 | || bfd_link_pie (&link_info)) |
| 109 | { |
| 110 | /* Dynamic linked executable with SDA and non-PIC. |
| 111 | Turn off load/store relaxtion. */ |
| 112 | /* This may support in the future. */ |
| 113 | load_store_relax = 0 ; |
| 114 | relax_fp_as_gp = 0; |
| 115 | } |
| 116 | |
| 117 | /* Call the standard elf routine. */ |
| 118 | gld${EMULATION_NAME}_after_open (); |
| 119 | } |
| 120 | |
| 121 | static void |
| 122 | nds32_elf_after_allocation (void) |
| 123 | { |
| 124 | /* Call default after allocation callback. |
| 125 | 1. This is where relaxation is done. |
| 126 | 2. It calls ldelf_map_segments to build ELF segment table. |
| 127 | 3. Any relaxation requires relax being done must be called after it. */ |
| 128 | gld${EMULATION_NAME}_after_allocation (); |
| 129 | } |
| 130 | |
| 131 | EOF |
| 132 | # Define some shell vars to insert bits of code into the standard elf |
| 133 | # parse_args and list_options functions. |
| 134 | # |
| 135 | PARSE_AND_LIST_PROLOGUE=' |
| 136 | #define OPTION_BASELINE 301 |
| 137 | #define OPTION_ELIM_GC_RELOCS (OPTION_BASELINE + 1) |
| 138 | #define OPTION_FP_AS_GP (OPTION_BASELINE + 2) |
| 139 | #define OPTION_NO_FP_AS_GP (OPTION_BASELINE + 3) |
| 140 | #define OPTION_REDUCE_FP_UPDATE (OPTION_BASELINE + 4) |
| 141 | #define OPTION_NO_REDUCE_FP_UPDATE (OPTION_BASELINE + 5) |
| 142 | #define OPTION_EXPORT_SYMBOLS (OPTION_BASELINE + 6) |
| 143 | #define OPTION_HYPER_RELAX (OPTION_BASELINE + 7) |
| 144 | #define OPTION_TLSDESC_TRAMPOLINE (OPTION_BASELINE + 8) |
| 145 | #define OPTION_NO_TLSDESC_TRAMPOLINE (OPTION_BASELINE + 9) |
| 146 | ' |
| 147 | PARSE_AND_LIST_LONGOPTS=' |
| 148 | { "mfp-as-gp", no_argument, NULL, OPTION_FP_AS_GP}, |
| 149 | { "mno-fp-as-gp", no_argument, NULL, OPTION_NO_FP_AS_GP}, |
| 150 | { "mexport-symbols", required_argument, NULL, OPTION_EXPORT_SYMBOLS}, |
| 151 | { "mhyper-relax", required_argument, NULL, OPTION_HYPER_RELAX}, |
| 152 | { "mtlsdesc-trampoline", no_argument, NULL, OPTION_TLSDESC_TRAMPOLINE}, |
| 153 | { "mno-tlsdesc-trampoline", no_argument, NULL, OPTION_NO_TLSDESC_TRAMPOLINE}, |
| 154 | /* These are deprecated options. Remove them in the future. */ |
| 155 | { "mrelax-reduce-fp-update", no_argument, NULL, OPTION_REDUCE_FP_UPDATE}, |
| 156 | { "mrelax-no-reduce-fp-update", no_argument, NULL, OPTION_NO_REDUCE_FP_UPDATE}, |
| 157 | { "mbaseline", required_argument, NULL, OPTION_BASELINE}, |
| 158 | { "meliminate-gc-relocs", no_argument, NULL, OPTION_ELIM_GC_RELOCS}, |
| 159 | { "mrelax-omit-fp", no_argument, NULL, OPTION_FP_AS_GP}, |
| 160 | { "mrelax-no-omit-fp", no_argument, NULL, OPTION_NO_FP_AS_GP}, |
| 161 | { "mgen-symbol-ld-script", required_argument, NULL, OPTION_EXPORT_SYMBOLS}, |
| 162 | ' |
| 163 | PARSE_AND_LIST_OPTIONS=' |
| 164 | fprintf (file, _("\ |
| 165 | --m[no-]fp-as-gp Disable/enable fp-as-gp relaxation\n")); |
| 166 | fprintf (file, _("\ |
| 167 | --mexport-symbols=FILE Exporting symbols in linker script\n")); |
| 168 | fprintf (file, _("\ |
| 169 | --mhyper-relax=level Adjust relax level (low|medium|high). default: medium\n")); |
| 170 | fprintf (file, _("\ |
| 171 | --m[no-]tlsdesc-trampoline Disable/enable TLS DESC trampoline\n")); |
| 172 | ' |
| 173 | PARSE_AND_LIST_ARGS_CASES=' |
| 174 | case OPTION_BASELINE: |
| 175 | einfo (_("%P: --mbaseline is not used anymore\n")); |
| 176 | break; |
| 177 | case OPTION_ELIM_GC_RELOCS: |
| 178 | eliminate_gc_relocs = 1; |
| 179 | break; |
| 180 | case OPTION_FP_AS_GP: |
| 181 | case OPTION_NO_FP_AS_GP: |
| 182 | relax_fp_as_gp = (optc == OPTION_FP_AS_GP); |
| 183 | break; |
| 184 | case OPTION_REDUCE_FP_UPDATE: |
| 185 | case OPTION_NO_REDUCE_FP_UPDATE: |
| 186 | einfo (_("%P: --relax-[no-]reduce-fp-updat is not used anymore\n")); |
| 187 | break; |
| 188 | case OPTION_EXPORT_SYMBOLS: |
| 189 | if (!optarg) |
| 190 | einfo (_("%P: missing file for --mexport-symbols\n"), optarg); |
| 191 | |
| 192 | if(strcmp (optarg, "-") == 0) |
| 193 | sym_ld_script = stdout; |
| 194 | else |
| 195 | { |
| 196 | sym_ld_script = fopen (optarg, FOPEN_WT); |
| 197 | if(sym_ld_script == NULL) |
| 198 | einfo (_("%F%P: cannot open map file %s: %E\n"), optarg); |
| 199 | } |
| 200 | break; |
| 201 | case OPTION_HYPER_RELAX: |
| 202 | if (!optarg) |
| 203 | einfo (_("%P: valid arguments to --mhyper-relax=(low|medium|high)\n")); |
| 204 | |
| 205 | if (strcmp (optarg, "low") == 0) |
| 206 | hyper_relax = 0; |
| 207 | else if (strcmp (optarg, "medium") == 0) |
| 208 | hyper_relax = 1; |
| 209 | else if (strcmp (optarg, "high") == 0) |
| 210 | hyper_relax = 2; |
| 211 | else |
| 212 | einfo (_("%P: valid arguments to --mhyper-relax=(low|medium|high)\n")); |
| 213 | |
| 214 | break; |
| 215 | case OPTION_TLSDESC_TRAMPOLINE: |
| 216 | tls_desc_trampoline = 1; |
| 217 | break; |
| 218 | case OPTION_NO_TLSDESC_TRAMPOLINE: |
| 219 | tls_desc_trampoline = 0; |
| 220 | break; |
| 221 | ' |
| 222 | LDEMUL_AFTER_OPEN=nds32_elf_after_open |
| 223 | LDEMUL_AFTER_PARSE=nds32_elf_after_parse |
| 224 | LDEMUL_AFTER_ALLOCATION=nds32_elf_after_allocation |
| 225 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=nds32_elf_create_output_section_statements |