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45cc0da93a
This patch adds optional support for Arm Pointer Authentication Codes. X30/LR is not stored to stack at any place and restored for usage. Therefore only adding PAC flag to .note.gnu.property section. Change-Id: I9581059dfa1eed88af5a73df15b6a0d299caea13 Bug: crashpad: 1145581 Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/3440070 Reviewed-by: Mark Mentovai <mark@chromium.org> Commit-Queue: Adenilson Cavalcanti <cavalcantii@chromium.org>
53 lines
1.9 KiB
ArmAsm
53 lines
1.9 KiB
ArmAsm
// Copyright 2018 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// This note section is used on ELF platforms to give ElfImageReader a method
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// of finding the instance of CrashpadInfo g_crashpad_info without requiring
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// that symbol to be in the dynamic symbol table.
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#include "util/misc/elf_note_types.h"
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#include "util/misc/arm64_pac_bti.S"
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// namespace crashpad {
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// CrashpadInfo g_test_crashpad_info;
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// } // namespace crashpad
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#define TEST_CRASHPAD_INFO_SYMBOL _ZN8crashpad20g_test_crashpad_infoE
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#define NOTE_ALIGN 4
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// This section must be "a"llocated so that it appears in the final binary at
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// runtime. The reference to TEST_CRASHPAD_INFO_SYMBOL uses an offset relative
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// to this note to avoid making this note writable, which triggers a bug in
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// GNU ld, or adding text relocations which require the target system to allow
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// making text segments writable. https://crbug.com/crashpad/260.
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.section .note.crashpad.info,"a",%note
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.balign NOTE_ALIGN
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.type info_size_test_note, %object
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info_size_test_note:
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.long name_end - name // namesz
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.long desc_end - desc // descsz
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.long CRASHPAD_ELF_NOTE_TYPE_CRASHPAD_INFO // type
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name:
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.asciz CRASHPAD_ELF_NOTE_NAME
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name_end:
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.balign NOTE_ALIGN
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desc:
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#if defined(__LP64__)
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.quad TEST_CRASHPAD_INFO_SYMBOL - desc
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#else
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.long TEST_CRASHPAD_INFO_SYMBOL - desc
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#endif // __LP64__
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desc_end:
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.size info_size_test_note, .-info_size_test_note
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