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6d5bd1d04d
This reverts 55133d332b6c and adds a broken dummy SafeTerminateProcess()
for cross builds instead. It’s similar to 2f4516f93838, which was for
CaptureContext().
This upstreams
af5f31ed61
(slightly modified).
The dummy implementation in the “broken” file affords no protection
against third-party code patching TerminateProcess() badly. The “broken”
file is not used by Crashpad anywhere at all, and is only used by
Crashpad in Chromium during a cross build targeting Windows without the
benefit of Microsoft’s ml.exe assembler. Strictly speaking, this file
does not need to be checked in to the Crashpad repository, but since
Chromium needs it to unblock its not-production-ready cross build for
Windows, it’s being landed here to avoid Chromium’s copy of Crashpad
appearing as modified or “dirty” relative to this upstream copy.
Bug: chromium:762167, chromium:777924
Change-Id: Iba68c0cab142fbe9541ea254a9a856b8263e4c70
Reviewed-on: https://chromium-review.googlesource.com/735078
Reviewed-by: Mark Mentovai <mark@chromium.org>
75 lines
2.0 KiB
NASM
75 lines
2.0 KiB
NASM
; Copyright 2017 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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; Detect ml64 assembling for x86_64 by checking for rax.
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ifdef rax
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_M_X64 equ 1
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else
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_M_IX86 equ 1
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endif
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ifdef _M_IX86
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.586
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.xmm
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.model flat
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includelib kernel32.lib
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extern __imp__TerminateProcess@8:proc
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; namespace crashpad {
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; bool SafeTerminateProcess(HANDLE process, UINT exit_code);
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; } // namespace crashpad
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SAFETERMINATEPROCESS_SYMBOL equ ?SafeTerminateProcess@crashpad@@YA_NPAXI@Z
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_TEXT segment
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public SAFETERMINATEPROCESS_SYMBOL
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SAFETERMINATEPROCESS_SYMBOL proc
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; This function is written in assembler source because it’s important for it
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; to not be inlined, for it to allocate a stack frame, and most critically,
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; for it to not trust esp on return from TerminateProcess().
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; __declspec(noinline) can prevent inlining and #pragma optimize("y", off) can
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; disable frame pointer omission, but there’s no way to force a C compiler to
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; distrust esp, and even if there was a way, it’d probably be fragile.
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push ebp
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mov ebp, esp
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push [ebp+12]
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push [ebp+8]
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call dword ptr [__imp__TerminateProcess@8]
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; Convert from BOOL to bool.
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test eax, eax
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setne al
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; TerminateProcess() is supposed to be stdcall (callee clean-up), and esp and
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; ebp are expected to already be equal. But if it’s been patched badly by
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; something that’s cdecl (caller clean-up), this next move will get things
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; back on track.
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mov esp, ebp
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pop ebp
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ret
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SAFETERMINATEPROCESS_SYMBOL endp
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_TEXT ends
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endif
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end
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