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StackCheckLib defines the interface between a compiler and the stack checking code. It is being converted from a NULL library class to an actual library class to make it easier to use for a platform and be easier to define the expected interface with a compiler, so if there is a compiler change it can be tracked and caught. Signed-off-by: Oliver Smith-Denny <osde@microsoft.com>
41 lines
1006 B
C
41 lines
1006 B
C
/** @file
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Provides the required functionality for handling stack
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cookie check failures in GCC.
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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 <Base.h>
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#include <Library/DebugLib.h>
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#include <Library/BaseLib.h>
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#include <Library/StackCheckLib.h>
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#include <Library/StackCheckFailureHookLib.h>
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/**
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Triggers an interrupt using the vector specified by PcdStackCookieExceptionVector
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**/
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VOID
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TriggerStackCookieInterrupt (
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VOID
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);
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VOID *__stack_chk_guard = (VOID *)(UINTN)STACK_COOKIE_VALUE;
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/**
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This function gets called when a gcc/clang generated stack cookie fails. This implementation calls into a platform
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failure hook lib and then triggers the stack cookie interrupt.
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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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DEBUG ((DEBUG_ERROR, "Stack cookie check failed at address 0x%llx!\n", RETURN_ADDRESS (0)));
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StackCheckFailureHook (RETURN_ADDRESS (0));
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TriggerStackCookieInterrupt ();
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}
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