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| author | Leif Lindholm <quic_llindhol@quicinc.com> | 2020-10-01 19:37:12 +0100 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2023-10-02 15:48:02 +0000 |
| commit | 1a66bd51ca21f341281d8e3157d3d3f4a94fd26c (patch) | |
| tree | 662fddca4f275374c91cbac9dee83d1d9cfa1c5c | |
| parent | 2b2705343a810538bc27f5e897da693984c82394 (diff) | |
| download | edk2-1a66bd51ca21f341281d8e3157d3d3f4a94fd26c.tar.gz edk2-1a66bd51ca21f341281d8e3157d3d3f4a94fd26c.tar.bz2 edk2-1a66bd51ca21f341281d8e3157d3d3f4a94fd26c.zip | |
MdePkg/BaseLib: ensure ARM LongJump never returns 0
The ARM implementation of InternalLongJump always returned the value
Value - but it is not supposed to ever return 0. Add the test to prevent
that, and return 1 if Value is 0 - as is already present in AArch64.
Signed-off-by: Leif Lindholm <quic_llindhol@quicinc.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Sami Mujawar <sami.mujawar@arm.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
| -rw-r--r-- | MdePkg/Library/BaseLib/Arm/SetJumpLongJump.S | 2 | ||||
| -rw-r--r-- | MdePkg/Library/BaseLib/Arm/SetJumpLongJump.asm | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.S b/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.S index e913202522..14006c6123 100644 --- a/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.S +++ b/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.S @@ -57,6 +57,8 @@ ASM_PFX(SetJump): ASM_PFX(InternalLongJump):
ldmia r0, {r3-r12,r14}
mov r13, r3
+ cmp r1, #0
+ moveq r1, #1
mov r0, r1
bx lr
diff --git a/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.asm b/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.asm index ef02d85e0e..15eb3dc28f 100644 --- a/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.asm +++ b/MdePkg/Library/BaseLib/Arm/SetJumpLongJump.asm @@ -57,6 +57,8 @@ SetJump InternalLongJump
LDM R0, {R3-R12,R14}
MOV R13, R3
+ CMP R1, #0
+ MOVEQ R1, #1
MOV R0, R1
BX LR
|