X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=ld%2Femultempl%2Fmipself.em;h=c7c164274e7b9fbcfce221f3f48b46d149b0f0cd;hb=f5a1cdde80a5cc5f1b86be7e94fb062d3fd4aca9;hp=e7a1be84fb4210ceaa9bc673c59d254b97f0851a;hpb=92b93329b58c744ea269b50f6278ed99416941a9;p=deliverable%2Fbinutils-gdb.git diff --git a/ld/emultempl/mipself.em b/ld/emultempl/mipself.em index e7a1be84fb..c7c164274e 100644 --- a/ld/emultempl/mipself.em +++ b/ld/emultempl/mipself.em @@ -1,5 +1,5 @@ # This shell script emits a C file. -*- C -*- -# Copyright 2006, 2007 Free Software Foundation, Inc. +# Copyright (C) 2004-2018 Free Software Foundation, Inc. # # This file is part of the GNU Binutils. # @@ -19,6 +19,23 @@ # MA 02110-1301, USA. fragment <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; + + default: + FAIL (); + break; + } + } + return FALSE; +} + +/* 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 asection * +mips_add_stub_section (const char *stub_sec_name, asection *input_section, + asection *output_section) +{ + 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_bfd, 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; +} + +/* This is called before the input files are opened. */ + +static void +mips_create_output_section_statements (void) +{ + struct elf_link_hash_table *htab; + + 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); + + if (is_mips_elf (link_info.output_bfd)) + _bfd_mips_elf_init_stubs (&link_info, mips_add_stub_section); +} + +/* This is called after we have merged the private data of the input bfds. */ + +static void +mips_before_allocation (void) +{ + if (is_mips_elf (link_info.output_bfd)) + { + flagword flags; + + 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); + } + + gld${EMULATION_NAME}_before_allocation (); +} + +/* Avoid processing the fake stub_file in vercheck, stat_needed and + check_needed routines. */ + +static void (*real_func) (lang_input_statement_type *); + +static void mips_for_each_input_file_wrapper (lang_input_statement_type *l) +{ + if (l != stub_file) + (*real_func) (l); +} + +static void +mips_lang_for_each_input_file (void (*func) (lang_input_statement_type *)) +{ + real_func = func; + lang_for_each_input_file (&mips_for_each_input_file_wrapper); +} + +#define lang_for_each_input_file mips_lang_for_each_input_file + EOF +# 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 + }; +' + +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 }, +' + +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" + )); +' + +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; +' + LDEMUL_AFTER_PARSE=mips_after_parse +LDEMUL_BEFORE_ALLOCATION=mips_before_allocation +LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=mips_create_output_section_statements