# This shell script emits a C file. -*- C -*-
-# Copyright 2006, 2007 Free Software Foundation, Inc.
+# Copyright (C) 2004-2020 Free Software Foundation, Inc.
#
# This file is part of the GNU Binutils.
#
# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
# MA 02110-1301, USA.
-cat >>e${EMULATION_NAME}.c <<EOF
+case ${target} in
+ *-*-*gnu*)
+ gnu_target=TRUE
+ ;;
+ *)
+ gnu_target=FALSE
+ ;;
+esac
+
+fragment <<EOF
+
+#include "ldctor.h"
+#include "elf/mips.h"
+#include "elfxx-mips.h"
+
+#define is_mips_elf(bfd) \
+ (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
+ && elf_tdata (bfd) != NULL \
+ && elf_object_id (bfd) == MIPS_ELF_DATA)
+
+/* Fake input file for stubs. */
+static lang_input_statement_type *stub_file;
+static bfd *stub_bfd;
+
+static bfd_boolean insn32;
+static bfd_boolean ignore_branch_isa;
+static bfd_boolean compact_branches;
+
+struct hook_stub_info
+{
+ lang_statement_list_type add;
+ asection *input_section;
+};
+
+/* Traverse the linker tree to find the spot where the stub goes. */
+
+static bfd_boolean
+hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
+{
+ 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;
+
+ 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_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_after_parse (void)
+mips_create_output_section_statements (void)
{
- /* .gnu.hash and the MIPS ABI require .dynsym to be sorted in different
- ways. .gnu.hash needs symbols to be grouped by hash code whereas the
- MIPS ABI requires a mapping between the GOT and the symbol table. */
- if (link_info.emit_gnu_hash)
+ 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,
+ ${gnu_target});
+
+ if (is_mips_elf (link_info.output_bfd))
{
- einfo ("%X%P: .gnu.hash is incompatible with the MIPS ABI\n");
- link_info.emit_hash = TRUE;
- link_info.emit_gnu_hash = FALSE;
+ _bfd_mips_elf_compact_branches (&link_info, compact_branches);
+ _bfd_mips_elf_init_stubs (&link_info, mips_add_stub_section);
}
- after_parse_default ();
}
+
+/* This is called after we have merged the private data of the input bfds. */
+
+static void
+mips_before_allocation (void)
+{
+ if (is_mips_elf (link_info.output_bfd))
+ {
+ flagword flags;
+
+ flags = elf_elfheader (link_info.output_bfd)->e_flags;
+ if (!bfd_link_pic (&link_info)
+ && !link_info.nocopyreloc
+ && (flags & (EF_MIPS_PIC | EF_MIPS_CPIC)) == EF_MIPS_CPIC)
+ _bfd_mips_elf_use_plts_and_copy_relocs (&link_info);
+ }
+
+ gld${EMULATION_NAME}_before_allocation ();
+}
+
EOF
-LDEMUL_AFTER_PARSE=mips_after_parse
+# 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
projects / thirdparty / binutils-gdb.git / blobdiff