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https://github.com/tianocore/edk2
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Add Null libs for Stack Check and Stack Check Failure Hook Lib that allow a platform to opt out of stack checks and the stack check failure hook lib. StackCheckLib allows implementation (or in this case null implementation) of stack checks on binaries. There is a Host Application specific version of this null lib because MSVC host applications must not be linked against our lib (so the file here is a no-op but that doesn't cause the build system to fail the build for not building a file for MSVC) as it links against the MSVC C runtime lib that provides the stack cookie definitions. GCC host applications do not link against such a C runtime lib and must be linked against our version. StackCheckFailureHookLib lets a platform do custom functionality when a stack check failure occurs (such as log it to a platform defined mechanism). The null lib simply returns. Signed-off-by: Oliver Smith-Denny <osde@linux.microsoft.com>
23 lines
458 B
C
23 lines
458 B
C
/** @file
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Defines the stack cookie variable for GCC and Clang compilers.
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Copyright (c) Microsoft Corporation.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Uefi.h>
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VOID *__stack_chk_guard = (VOID *)(UINTN)0x0;
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/**
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This function gets called when a gcc/clang generated stack cookie fails. This implementation does nothing when
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a stack cookie failure occurs.
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**/
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VOID
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EFIAPI
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__stack_chk_fail (
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VOID
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)
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{
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}
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