# This shell script emits a C file. -*- C -*- # Copyright (C) 2012-2013 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 "libbfd.h" #include "elf-bfd.h" #include "elf/nds32.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> */ /* Disable if linking a dynamically linked executable. */ static int load_store_relax = 1; static int target_optimize = 0; /* Switch optimization. */ static int relax_status = 0; /* Finished optimization. */ static int relax_round = 0; /* Going optimization. */ static FILE *ex9_export_file = NULL; /* --mexport-ex9=<file> */ static FILE *ex9_import_file = NULL; /* --mimport-ex9=<file> */ static int update_ex9_table = 0; /* --mupdate-ex9. */ static int ex9_limit = 511; static bfd_boolean ex9_loop_aware = FALSE; /* Ignore ex9 if inside a loop. */ static bfd_boolean ifc_loop_aware = FALSE; /* Ignore ifc if inside a loop. */ /* 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%X%P: error: Cannot change output format whilst linking NDS32 binaries.\n"); return; } bfd_elf32_nds32_set_target_option (&link_info, relax_fp_as_gp, eliminate_gc_relocs, sym_ld_script, load_store_relax, target_optimize, relax_status, relax_round, ex9_export_file, ex9_import_file, update_ex9_table, ex9_limit, ex9_loop_aware, ifc_loop_aware); } static void nds32_elf_after_parse (void) { if (link_info.relocatable) DISABLE_RELAXATION; if (!RELAXATION_ENABLED) { target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON); target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON); relax_fp_as_gp = 0; } if (ex9_import_file != NULL) { ex9_export_file = NULL; target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON); } else update_ex9_table = 0; if (link_info.shared) { target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON); target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON); } after_parse_default (); } 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%B: ABI version of object files mismatched\n"), abfd); } /* Append .ex9.itable section in the last input object file. */ if (!link_info.relocatable && abfd->link_next == NULL) { asection *itable; struct bfd_link_hash_entry *h; itable = bfd_make_section_with_flags (abfd, ".ex9.itable", SEC_CODE | SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_READONLY | SEC_IN_MEMORY | SEC_KEEP); if (itable) { itable->gc_mark = 1; itable->alignment_power = 2; if ((target_optimize & NDS32_RELAX_EX9_ON)) { itable->size = 0x1000; itable->contents = bfd_zalloc (abfd, itable->size); } else { itable->size = 0x4; itable->contents = bfd_zalloc (abfd, itable->size); bfd_putb32 (INSN_BREAK_EA,itable->contents); } /* Add a symbol in the head of ex9.itable to objdump clearly. */ h = bfd_link_hash_lookup (link_info.hash, "_EX9_BASE_", FALSE, FALSE, FALSE); _bfd_generic_link_add_one_symbol (&link_info, link_info.output_bfd, "_EX9_BASE_", BSF_GLOBAL | BSF_WEAK, itable, 0, (const char *) NULL, FALSE, get_elf_backend_data (link_info.output_bfd)->collect, &h); } } } /* Check object files if the target is dynamic linked executable or shared object. */ if (elf_hash_table (&link_info)->dynamic_sections_created || link_info.shared || link_info.pie) { for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next) { if (!(elf_elfheader (abfd)->e_flags & E_NDS32_HAS_PIC)) { /* Non-PIC object file is used. */ if (link_info.shared || link_info.pie) { /* For PIE or shared object, all input must be PIC. */ einfo (_("%B: must use -fpic to compile this file for shared object or PIE\n"), abfd); } else { /* Dynamic linked executable with SDA and non-PIC. Turn off load/store relaxtion. */ load_store_relax = 0 ; relax_fp_as_gp = 0; } } } /* Turn off relax when building shared object or PIE until we can support their relaxation. */ } /* Call the standard elf routine. */ gld${EMULATION_NAME}_after_open (); } static void nds32_elf_relax_stub (bfd_boolean relax) { /* Re-caculate memory map address. */ lang_do_assignments (lang_assigning_phase_enum); lang_reset_memory_regions (); one_lang_size_sections_pass (&relax, FALSE); } static void nds32_elf_after_allocation (void) { struct elf_nds32_link_hash_table *table; table = nds32_elf_hash_table (&link_info); /* Call default after allocation callback. 1. This is where relaxation is done. 2. It calls gld${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 (); if (!table) return; /* Use IFC */ if ((target_optimize & NDS32_RELAX_JUMP_IFC_ON) && !(table->relax_status & NDS32_RELAX_JUMP_IFC_DONE)) { table->relax_round = NDS32_RELAX_JUMP_IFC_ROUND; /* Traverse all sections to build j and jal list. */ nds32_elf_relax_stub (TRUE); /* Replace with ifc. */ if (!nds32_elf_ifc_finish (&link_info)) einfo (_("%F: Please report this bug. IFC error.\n")); table->relax_round = NDS32_RELAX_NONE_ROUND; /* Adjust address after ifcall. */ nds32_elf_relax_stub (FALSE); if (!nds32_elf_ifc_reloc ()) einfo (_("%F: Please report this bug. IFC error.\n")); } /* EX9 Instruction Table Relaxation. */ if (!link_info.relocatable && !nds32_elf_ex9_itb_base (&link_info)) einfo (_("%F: Please report this bug. Ex9 relocation error.\n")); /* Generate ex9 table. */ if ((target_optimize & NDS32_RELAX_EX9_ON) && !(table->relax_status & NDS32_RELAX_EX9_DONE)) { /* Ex9 entry point. */ table->relax_round = NDS32_RELAX_EX9_BUILD_ROUND; /* Initialize ex9 hash table. */ if (!nds32_elf_ex9_init ()) return; /* Build ex9 instruction table. */ nds32_elf_relax_stub (TRUE); nds32_elf_ex9_finish (&link_info); /* Replace with ex9.it. */ nds32_elf_relax_stub (TRUE); table->relax_round = NDS32_RELAX_NONE_ROUND; /* Do ifc again. */ if (target_optimize & NDS32_RELAX_JUMP_IFC_ON) if (!nds32_elf_ifc_finish (&link_info)) einfo (_("%F: Please report this bug. IFC error.\n")); /* Re-caculate memory map address. */ lang_do_assignments (lang_assigning_phase_enum); /* Relocation for .ex9.itable. */ nds32_elf_ex9_reloc_jmp (&link_info); } else if (ex9_import_file != NULL && !(table->relax_status = NDS32_RELAX_EX9_DONE)) { /* Import ex9 table. */ if (update_ex9_table == 1) { /* Build ex9 table. */ table->relax_round = NDS32_RELAX_EX9_BUILD_ROUND; /* Initialize ex9 hash table. */ if (!nds32_elf_ex9_init ()) return; /* Build ex9 table. */ nds32_elf_relax_stub (TRUE); /* Relocation for .ex9.itable. */ lang_do_assignments (lang_assigning_phase_enum); nds32_elf_ex9_reloc_jmp (&link_info); } nds32_elf_ex9_import_table (&link_info); /* Replace with ex9.it. */ table->relax_round = NDS32_RELAX_EX9_REPLACE_ROUND; table->relax_status |= NDS32_RELAX_EX9_DONE; nds32_elf_relax_stub (TRUE); } } 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) /* These are only available to ex9. */ #if defined NDS32_EX9_EXT #define OPTION_EX9_BASELINE 320 #define OPTION_EX9_TABLE (OPTION_EX9_BASELINE + 1) #define OPTION_NO_EX9_TABLE (OPTION_EX9_BASELINE + 2) #define OPTION_EXPORT_EX9 (OPTION_EX9_BASELINE + 3) #define OPTION_IMPORT_EX9 (OPTION_EX9_BASELINE + 4) #define OPTION_UPDATE_EX9 (OPTION_EX9_BASELINE + 5) #define OPTION_EX9_LIMIT (OPTION_EX9_BASELINE + 6) #define OPTION_EX9_LOOP (OPTION_EX9_BASELINE + 7) #endif /* These are only available to link-time ifc. */ #if defined NDS32_IFC_EXT #define OPTION_IFC_BASELINE 340 #define OPTION_JUMP_IFC (OPTION_IFC_BASELINE + 1) #define OPTION_NO_JUMP_IFC (OPTION_IFC_BASELINE + 2) #define OPTION_IFC_LOOP (OPTION_IFC_BASELINE + 3) #endif ' 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}, { "mgen-symbol-ld-script", required_argument, NULL, OPTION_EXPORT_SYMBOLS}, /* 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}, /* These are specific optioins for ex9-ext support. */ #if defined NDS32_EX9_EXT { "mex9", no_argument, NULL, OPTION_EX9_TABLE}, { "mno-ex9", no_argument, NULL, OPTION_NO_EX9_TABLE}, { "mexport-ex9", required_argument, NULL, OPTION_EXPORT_EX9}, { "mimport-ex9", required_argument, NULL, OPTION_IMPORT_EX9}, { "mupdate-ex9", no_argument, NULL, OPTION_UPDATE_EX9}, { "mex9-limit", required_argument, NULL, OPTION_EX9_LIMIT}, { "mex9-loop-aware", no_argument, NULL, OPTION_EX9_LOOP}, #endif /* These are specific optioins for ifc-ext support. */ #if defined NDS32_IFC_EXT { "mifc", no_argument, NULL, OPTION_JUMP_IFC}, { "mno-ifc", no_argument, NULL, OPTION_NO_JUMP_IFC}, { "mifc-loop-aware", no_argument, NULL, OPTION_IFC_LOOP}, #endif ' PARSE_AND_LIST_OPTIONS=' fprintf (file, _("\ --m[no-]fp-as-gp Disable/enable fp-as-gp relaxation\n\ --mexport-symbols=FILE Exporting symbols in linker script\n\ ")); #if defined NDS32_EX9_EXT fprintf (file, _("\ --m[no-]ex9 Disable/enable link-time EX9 relaxation\n\ --mexport-ex9=FILE Export EX9 table after linking\n\ --mimport-ex9=FILE Import Ex9 table for EX9 relaxation\n\ --mupdate-ex9 Update existing EX9 table\n\ --mex9-limit=NUM Maximum number of entries in ex9 table\n\ --mex9-loop-aware Avoid generate EX9 instruction inside loop\n\ ")); #endif #if defined NDS32_IFC_EXT fprintf (file, _("\ --m[no-]ifc Disable/enable link-time IFC optimization\n\ --mifc-loop-aware Avoid generate IFC instruction inside loop\n\ ")); #endif ' 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 (_("Missing file for --mgen-symbol-ld-script.\n"), optarg); if(strcmp (optarg, "-") == 0) sym_ld_script = stdout; else { sym_ld_script = fopen (optarg, FOPEN_WT); if(sym_ld_script == NULL) einfo (_("%P%F: cannot open map file %s: %E.\n"), optarg); } break; #if defined NDS32_EX9_EXT case OPTION_EX9_TABLE: target_optimize = target_optimize | NDS32_RELAX_EX9_ON; break; case OPTION_NO_EX9_TABLE: target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON); break; case OPTION_EXPORT_EX9: if (!optarg) einfo (_("Missing file for --mexport-ex9=<file>.\n")); if(strcmp (optarg, "-") == 0) ex9_export_file = stdout; else { ex9_export_file = fopen (optarg, FOPEN_WT); if(ex9_export_file == NULL) einfo (_("ERROR %P%F: cannot open ex9 export file %s.\n"), optarg); } break; case OPTION_IMPORT_EX9: if (!optarg) einfo (_("Missing file for --mimport-ex9=<file>.\n")); ex9_import_file = fopen (optarg, "r+"); if(ex9_import_file == NULL) einfo (_("ERROR %P%F: cannot open ex9 import file %s.\n"), optarg); break; case OPTION_UPDATE_EX9: update_ex9_table = 1; break; case OPTION_EX9_LIMIT: if (optarg) { ex9_limit = atoi (optarg); if (ex9_limit > 511 || ex9_limit < 1) { einfo (_("ERROR: the range of ex9_limit must between 1 and 511\n")); exit (1); } } break; case OPTION_EX9_LOOP: target_optimize = target_optimize | NDS32_RELAX_EX9_ON; ex9_loop_aware = 1; break; #endif #if defined NDS32_IFC_EXT case OPTION_JUMP_IFC: target_optimize = target_optimize | NDS32_RELAX_JUMP_IFC_ON; break; case OPTION_NO_JUMP_IFC: target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON); break; case OPTION_IFC_LOOP: target_optimize = target_optimize | NDS32_RELAX_JUMP_IFC_ON; ifc_loop_aware = 1; break; #endif ' 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