X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=ld%2Femultempl%2Fmipself.em;h=48e998afa93a09f26bb6f85981ec7474a92b3182;hb=dbe23755ac67ab61106d03527c6813ebec0e4c5e;hp=d3054e882de6d0166e18773b945de5f8c9411d40;hpb=8505f8840799eb6b7b9efdf801299e2107009d84;p=deliverable%2Fbinutils-gdb.git diff --git a/ld/emultempl/mipself.em b/ld/emultempl/mipself.em index d3054e882d..48e998afa9 100644 --- a/ld/emultempl/mipself.em +++ b/ld/emultempl/mipself.em @@ -1,12 +1,11 @@ -# Copyright 2002 Free Software Foundation, Inc. -# Written by Mitch Lichtenberg and -# Chris Demetriou based on m68kelf.em and mipsecoff.em. +# This shell script emits a C file. -*- C -*- +# Copyright (C) 2004-2020 Free Software Foundation, Inc. # -# This file is part of GLD, the Gnu Linker. +# 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 2 of the License, or +# 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, @@ -16,168 +15,292 @@ # # 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. -# This shell script emits a C file. -*- C -*- - - -# This file is sourced from elf32.em, and defines some extra routines for m68k -# embedded systems using ELF and for some other systems using m68k ELF. While -# it is sourced from elf32.em for all m68k ELF configurations, here we include -# only the features we want depending on the configuration. +# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, +# MA 02110-1301, USA. case ${target} in - mips*-*-elf) - echo "#define SUPPORT_EMBEDDED_RELOCS" >>e${EMULATION_NAME}.c + *-*-*gnu*) + gnu_target=TRUE + ;; + *) + gnu_target=FALSE ;; esac -cat >>e${EMULATION_NAME}.c <link_next) - { - asection *datasec; - - /* As first-order business, make sure that each input BFD is - ELF. We need to call a special BFD backend function to - generate the embedded relocs, and we have that function - only for ELF */ - - if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) - einfo ("%F%B: all input objects must be ELF for --embedded-relocs\n"); - - if (bfd_get_arch_size (abfd) != ${ELFSIZE}) - einfo ("%F%B: all input objects must be ${ELFSIZE}-bit ELF for --embedded-relocs\n"); - - datasec = bfd_get_section_by_name (abfd, ".sdata"); - - /* Note that we assume that the reloc_count field has already - been set up. We could call bfd_get_reloc_upper_bound, but - that returns the size of a memory buffer rather than a reloc - count. We do not want to call bfd_canonicalize_reloc, - because although it would always work it would force us to - read in the relocs into BFD canonical form, which would waste - a significant amount of time and memory. */ - - if (datasec != NULL && datasec->reloc_count > 0) - { - asection *relsec; - - relsec = bfd_make_section (abfd, ".rel.sdata"); - if (relsec == NULL - || ! bfd_set_section_flags (abfd, relsec, - (SEC_ALLOC - | SEC_LOAD - | SEC_HAS_CONTENTS - | SEC_IN_MEMORY)) - || ! bfd_set_section_alignment (abfd, relsec, - (${ELFSIZE} == 32) ? 2 : 3) - || ! bfd_set_section_size (abfd, relsec, - datasec->reloc_count - * ((${ELFSIZE} / 8) + 8))) - einfo ("%F%B: cannot create .rel.sdata section: %E\n"); + lang_statement_union_type *l; + bfd_boolean ret; + + for (; (l = *lp) != NULL; lp = &l->header.next) + { + switch (l->header.type) + { + case lang_constructors_statement_enum: + ret = hook_in_stub (info, &constructor_list.head); + if (ret) + return ret; + break; + + case lang_output_section_statement_enum: + ret = hook_in_stub (info, + &l->output_section_statement.children.head); + if (ret) + return ret; + break; + + case lang_wild_statement_enum: + ret = hook_in_stub (info, &l->wild_statement.children.head); + if (ret) + return ret; + break; + + case lang_group_statement_enum: + ret = hook_in_stub (info, &l->group_statement.children.head); + if (ret) + return ret; + break; + + case lang_input_section_enum: + if (info->input_section == NULL + || l->input_section.section == info->input_section) + { + /* We've found our section. Insert the stub immediately + before its associated input section. */ + *lp = info->add.head; + *(info->add.tail) = l; + return TRUE; } + break; + + case lang_data_statement_enum: + case lang_reloc_statement_enum: + case lang_object_symbols_statement_enum: + case lang_output_statement_enum: + case lang_target_statement_enum: + case lang_input_statement_enum: + case lang_assignment_statement_enum: + case lang_padding_statement_enum: + case lang_address_statement_enum: + case lang_fill_statement_enum: + break; - /* Double check that all other data sections have no relocs, - as is required for embedded PIC code. */ - bfd_map_over_sections (abfd, mips_elf${ELFSIZE}_check_sections, - (PTR) datasec); - } + default: + FAIL (); + break; + } } -#endif /* SUPPORT_EMBEDDED_RELOCS */ + return FALSE; } -#ifdef SUPPORT_EMBEDDED_RELOCS -/* Check that of the data sections, only the .sdata section has - relocs. This is called via bfd_map_over_sections. */ +/* Create a new stub section called STUB_SEC_NAME and arrange for it to + be linked in OUTPUT_SECTION. The section should go at the beginning of + OUTPUT_SECTION if INPUT_SECTION is null, otherwise it must go immediately + before INPUT_SECTION. */ -static void -mips_elf${ELFSIZE}_check_sections (abfd, sec, sdatasec) - bfd *abfd; - asection *sec; - PTR sdatasec; +static asection * +mips_add_stub_section (const char *stub_sec_name, asection *input_section, + asection *output_section) { - if ((bfd_get_section_flags (abfd, sec) & SEC_CODE) == 0 - && sec != (asection *) sdatasec - && sec->reloc_count != 0) - einfo ("%B%X: section %s has relocs; cannot use --embedded-relocs\n", - abfd, bfd_get_section_name (abfd, sec)); + asection *stub_sec; + flagword flags; + lang_output_section_statement_type *os; + struct hook_stub_info info; + + /* PR 12845: If the input section has been garbage collected it will + not have its output section set to *ABS*. */ + if (bfd_is_abs_section (output_section)) + return NULL; + + /* Create the stub file, if we haven't already. */ + if (stub_file == NULL) + { + stub_file = lang_add_input_file ("linker stubs", + lang_input_file_is_fake_enum, + NULL); + stub_bfd = bfd_create ("linker stubs", link_info.output_bfd); + if (stub_bfd == NULL + || !bfd_set_arch_mach (stub_bfd, + bfd_get_arch (link_info.output_bfd), + bfd_get_mach (link_info.output_bfd))) + { + einfo (_("%F%P: can not create BFD: %E\n")); + return NULL; + } + stub_bfd->flags |= BFD_LINKER_CREATED; + stub_file->the_bfd = stub_bfd; + ldlang_add_file (stub_file); + } + + /* Create the section. */ + stub_sec = bfd_make_section_anyway (stub_bfd, stub_sec_name); + if (stub_sec == NULL) + goto err_ret; + + /* Set the flags. */ + flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE + | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_KEEP); + if (!bfd_set_section_flags (stub_sec, flags)) + goto err_ret; + + os = lang_output_section_get (output_section); + + /* Initialize a statement list that contains only the new statement. */ + lang_list_init (&info.add); + lang_add_section (&info.add, stub_sec, NULL, os); + if (info.add.head == NULL) + goto err_ret; + + /* Insert the new statement in the appropriate place. */ + info.input_section = input_section; + if (hook_in_stub (&info, &os->children.head)) + return stub_sec; + + err_ret: + einfo (_("%X%P: can not make stub section: %E\n")); + return NULL; } -#endif /* SUPPORT_EMBEDDED_RELOCS */ -/* This function is called after the section sizes and offsets have - been set. If we are generating embedded relocs, it calls a special - BFD backend routine to do the work. */ +/* This is called before the input files are opened. */ static void -mips_elf${ELFSIZE}_after_allocation () +mips_create_output_section_statements (void) { - /* Call the standard elf routine. */ - after_allocation_default (); + struct elf_link_hash_table *htab; -#ifdef SUPPORT_EMBEDDED_RELOCS - if (command_line.embedded_relocs && (! link_info.relocateable)) - { - bfd *abfd; - - for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next) - { - asection *datasec, *relsec; - char *errmsg; + htab = elf_hash_table (&link_info); + if (is_elf_hash_table (htab) && is_mips_elf (link_info.output_bfd)) + _bfd_mips_elf_linker_flags (&link_info, insn32, ignore_branch_isa, + ${gnu_target}); - datasec = bfd_get_section_by_name (abfd, ".sdata"); + if (is_mips_elf (link_info.output_bfd)) + { + _bfd_mips_elf_compact_branches (&link_info, compact_branches); + _bfd_mips_elf_init_stubs (&link_info, mips_add_stub_section); + } +} - if (datasec == NULL || datasec->reloc_count == 0) - continue; +/* This is called after we have merged the private data of the input bfds. */ - relsec = bfd_get_section_by_name (abfd, ".rel.sdata"); - ASSERT (relsec != NULL); +static void +mips_before_allocation (void) +{ + if (is_mips_elf (link_info.output_bfd)) + { + flagword flags; - if (! bfd_mips_elf${ELFSIZE}_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); - } - } + flags = elf_elfheader (link_info.output_bfd)->e_flags; + if (!bfd_link_pic (&link_info) + && !link_info.nocopyreloc + && (flags & (EF_MIPS_PIC | EF_MIPS_CPIC)) == EF_MIPS_CPIC) + _bfd_mips_elf_use_plts_and_copy_relocs (&link_info); } -#endif /* SUPPORT_EMBEDDED_RELOCS */ + + gld${EMULATION_NAME}_before_allocation (); } EOF -# We have our own after_open and after_allocation functions, but they call -# the standard routines, so give them a different name. -LDEMUL_AFTER_OPEN=mips_elf${ELFSIZE}_after_open -LDEMUL_AFTER_ALLOCATION=mips_elf${ELFSIZE}_after_allocation +# Define some shell vars to insert bits of code into the standard elf +# parse_args and list_options functions. +# +PARSE_AND_LIST_PROLOGUE=' +enum + { + OPTION_INSN32 = 301, + OPTION_NO_INSN32, + OPTION_IGNORE_BRANCH_ISA, + OPTION_NO_IGNORE_BRANCH_ISA, + OPTION_COMPACT_BRANCHES, + OPTION_NO_COMPACT_BRANCHES + }; +' + +PARSE_AND_LIST_LONGOPTS=' + { "insn32", no_argument, NULL, OPTION_INSN32 }, + { "no-insn32", no_argument, NULL, OPTION_NO_INSN32 }, + { "ignore-branch-isa", no_argument, NULL, OPTION_IGNORE_BRANCH_ISA }, + { "no-ignore-branch-isa", no_argument, NULL, OPTION_NO_IGNORE_BRANCH_ISA }, + { "compact-branches", no_argument, NULL, OPTION_COMPACT_BRANCHES }, + { "no-compact-branches", no_argument, NULL, OPTION_NO_COMPACT_BRANCHES }, +' + +PARSE_AND_LIST_OPTIONS=' + fprintf (file, _("\ + --insn32 Only generate 32-bit microMIPS instructions\n" + )); + fprintf (file, _("\ + --no-insn32 Generate all microMIPS instructions\n" + )); + fprintf (file, _("\ + --ignore-branch-isa Accept invalid branch relocations requiring\n\ + an ISA mode switch\n" + )); + fprintf (file, _("\ + --no-ignore-branch-isa Reject invalid branch relocations requiring\n\ + an ISA mode switch\n" + )); + fprintf (file, _("\ + --compact-branches Generate compact branches/jumps for MIPS R6\n" + )); + fprintf (file, _("\ + --no-compact-branches Generate delay slot branches/jumps for MIPS R6\n" + )); +' + +PARSE_AND_LIST_ARGS_CASES=' + case OPTION_INSN32: + insn32 = TRUE; + break; + + case OPTION_NO_INSN32: + insn32 = FALSE; + break; + + case OPTION_IGNORE_BRANCH_ISA: + ignore_branch_isa = TRUE; + break; + + case OPTION_NO_IGNORE_BRANCH_ISA: + ignore_branch_isa = FALSE; + break; + + case OPTION_COMPACT_BRANCHES: + compact_branches = TRUE; + break; + + case OPTION_NO_COMPACT_BRANCHES: + compact_branches = FALSE; + break; +' + +LDEMUL_BEFORE_ALLOCATION=mips_before_allocation +LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=mips_create_output_section_statements