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MdePkg: Add Stack Cookie Interrupt Vector PCD 

This patch adds a PCD allowing a platform to specify
the interrupt vector to trigger on a stack check
failure. On x86, this is an offset into the IDT.
On ARM/AARCH64, this triggers a software interrupt
that can be decoded to indicate this was a stack
check failure.

Signed-off-by: Oliver Smith-Denny <osde@linux.microsoft.com>
This commit is contained in:
Oliver Smith-Denny 2024-06-14 13:20:29 -07:00 committed by mergify[bot]
parent 26c3818011
commit 3a9da5f329
1 changed files with 3 additions and 0 deletions
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MdePkg/MdePkg.dec
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@ -2259,6 +2259,9 @@
# @Prompt Speculation Barrier Type.
gEfiMdePkgTokenSpaceGuid.PcdSpeculationBarrierType|0x01|UINT8|0x30001018
## This PCD specifies the interrupt vector for stack cookie check failures
gEfiMdePkgTokenSpaceGuid.PcdStackCookieExceptionVector|0x42|UINT8|0x30001019
[PcdsFixedAtBuild,PcdsPatchableInModule]
## Indicates the maximum length of unicode string used in the following
# BaseLib functions: StrLen(), StrSize(), StrCmp(), StrnCmp(), StrCpy(), StrnCpy()<BR><BR>