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9344f09215
https://bugzilla.tianocore.org/show_bug.cgi?id=1373 Replace BSD 2-Clause License with BSD+Patent License. This change is based on the following emails: https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html RFCs with detailed process for the license change: V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com>
64 lines
1.7 KiB
NASM
64 lines
1.7 KiB
NASM
;------------------------------------------------------------------------------
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;
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; Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
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; SPDX-License-Identifier: BSD-2-Clause-Patent
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;
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; Module Name:
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;
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; SetJump.Asm
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;
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; Abstract:
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;
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; Implementation of SetJump() on IA-32.
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;
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;------------------------------------------------------------------------------
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%include "Nasm.inc"
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SECTION .text
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extern ASM_PFX(InternalAssertJumpBuffer)
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extern ASM_PFX(PcdGet32 (PcdControlFlowEnforcementPropertyMask))
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;------------------------------------------------------------------------------
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; UINTN
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; EFIAPI
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; SetJump (
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; OUT BASE_LIBRARY_JUMP_BUFFER *JumpBuffer
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; );
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;------------------------------------------------------------------------------
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global ASM_PFX(SetJump)
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ASM_PFX(SetJump):
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push DWORD [esp + 4]
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call ASM_PFX(InternalAssertJumpBuffer) ; To validate JumpBuffer
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pop ecx
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pop ecx ; ecx <- return address
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mov edx, [esp]
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xor eax, eax
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mov [edx + 24], eax ; save 0 to SSP
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mov eax, [ASM_PFX(PcdGet32 (PcdControlFlowEnforcementPropertyMask))]
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test eax, eax
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jz CetDone
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mov eax, cr4
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bt eax, 23 ; check if CET is enabled
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jnc CetDone
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mov eax, 1
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INCSSP_EAX ; to read original SSP
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READSSP_EAX
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mov [edx + 0x24], eax ; save SSP
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CetDone:
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mov [edx], ebx
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mov [edx + 4], esi
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mov [edx + 8], edi
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mov [edx + 12], ebp
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mov [edx + 16], esp
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mov [edx + 20], ecx ; eip value to restore in LongJump
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xor eax, eax
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jmp ecx
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