blob: 8084db940a8d6a683b75cba4e1c0d9045a14a705 [file] [log] [blame]
// Copyright 2018 The Crashpad Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// This note section is used on ELF platforms to give ElfImageReader a method
// of finding the instance of CrashpadInfo g_crashpad_info without requiring
// that symbol to be in the dynamic symbol table.
#include "build/build_config.h"
#include "util/misc/elf_note_types.h"
// namespace crashpad {
// CrashpadInfo g_crashpad_info;
// } // namespace crashpad
#define CRASHPAD_INFO_SYMBOL _ZN8crashpad15g_crashpad_infoE
#define NOTE_ALIGN 4
// This section must be "a"llocated so that it appears in the final binary at
// runtime, and "w"ritable so that the relocation to CRASHPAD_INFO_SYMBOL can
// be performed.
.section .note.crashpad.info,"aw",%note
.balign NOTE_ALIGN
# .globl indicates that it's available to link against other .o files. .hidden
# indicates that it will not appear in the executable's symbol table.
.globl CRASHPAD_NOTE_REFERENCE
.hidden CRASHPAD_NOTE_REFERENCE
.type CRASHPAD_NOTE_REFERENCE, %object
CRASHPAD_NOTE_REFERENCE:
.long name_end - name // namesz
.long desc_end - desc // descsz
.long CRASHPAD_ELF_NOTE_TYPE_CRASHPAD_INFO // type
name:
.asciz CRASHPAD_ELF_NOTE_NAME
name_end:
.balign NOTE_ALIGN
desc:
#if defined(ARCH_CPU_64_BITS)
.quad CRASHPAD_INFO_SYMBOL
#else
#if defined(ARCH_CPU_LITTLE_ENDIAN)
.long CRASHPAD_INFO_SYMBOL
.long 0
#else
.long 0
.long CRASHPAD_INFO_SYMBOL
#endif // ARCH_CPU_LITTLE_ENDIAN
#endif // ARCH_CPU_64_BITS
desc_end:
.size CRASHPAD_NOTE_REFERENCE, .-CRASHPAD_NOTE_REFERENCE