69 lines
2.6 KiB
ArmAsm
69 lines
2.6 KiB
ArmAsm
// Copyright 2018 The Crashpad Authors
|
|
//
|
|
// 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 "util/misc/elf_note_types.h"
|
|
#include "util/misc/arm64_pac_bti.S"
|
|
|
|
// 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. The reference to CRASHPAD_INFO_SYMBOL uses an offset relative to
|
|
// this note to avoid making this note writable, which triggers a bug in GNU
|
|
// ld, or adding text relocations which require the target system to allow
|
|
// making text segments writable. https://crbug.com/crashpad/260.
|
|
.section .note.crashpad.info,"a",%note
|
|
.balign NOTE_ALIGN
|
|
CRASHPAD_NOTE:
|
|
.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(__LP64__)
|
|
.quad CRASHPAD_INFO_SYMBOL - desc
|
|
#else
|
|
.long CRASHPAD_INFO_SYMBOL - desc
|
|
#endif // __LP64__
|
|
desc_end:
|
|
.size CRASHPAD_NOTE, .-CRASHPAD_NOTE
|
|
|
|
// CRASHPAD_NOTE can't be referenced directly by GetCrashpadInfo() because the
|
|
// relocation used to make the reference may require that the address be
|
|
// 8-byte aligned and notes must have 4-byte alignment.
|
|
.section .rodata,"a",%progbits
|
|
.balign 8
|
|
# .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:
|
|
// The value of this quad isn't important. It exists to reference
|
|
// CRASHPAD_NOTE, causing the linker to include the note into the binary
|
|
// linking Crashpad. The subtraction from |name| is a convenience to allow the
|
|
// value to be computed statically.
|
|
.quad name - CRASHPAD_NOTE
|