Both in SetJump and in InternalLongJump, 32-bit w register views were
used for the UINTN return value. In SetJump, this did not cause errors;
it was only counterintuitive. But in InternalLongJump, it meant the top
32 bits of Value were stripped off.
Change all of these to use the 64-bit x register views.
Signed-off-by: Leif Lindholm <quic_llindhol@quicinc.com>
Reanimated-by: Andrei Warkentin <andrei.warkentin@intel.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Sami Mujawar <sami.mujawar@arm.com>
---
MdePkg/Library/BaseLib/AArch64/SetJumpLongJump.S | 8 ++++----
MdePkg/Library/BaseLib/AArch64/SetJumpLongJump.asm | 8 ++++----
2 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/MdePkg/Library/BaseLib/AArch64/SetJumpLongJump.S b/MdePkg/Library/BaseLib/AArch64/SetJumpLongJump.S
index de79ad3a0a3e..3e58119b25d2 100644
--- a/MdePkg/Library/BaseLib/AArch64/SetJumpLongJump.S
+++ b/MdePkg/Library/BaseLib/AArch64/SetJumpLongJump.S
@@ -61,7 +61,7 @@ ASM_PFX(SetJump):
FPR_LAYOUT
#undef REG_PAIR
#undef REG_ONE
- mov w0, #0
+ mov x0, #0
ret
#/**
@@ -91,9 +91,9 @@ ASM_PFX(InternalLongJump):
#undef REG_PAIR
#undef REG_ONE
mov sp, x16
- cmp w1, #0
- mov w0, #1
- csel w0, w1, w0, ne
+ cmp x1, #0
+ mov x0, #1
+ csel x0, x1, x0, ne
ret
ASM_FUNCTION_REMOVE_IF_UNREFERENCED
diff --git a/MdePkg/Library/BaseLib/AArch64/SetJumpLongJump.asm b/MdePkg/Library/BaseLib/AArch64/SetJumpLongJump.asm
index c2774eece311..6ec8f35f2c9f 100644
--- a/MdePkg/Library/BaseLib/AArch64/SetJumpLongJump.asm
+++ b/MdePkg/Library/BaseLib/AArch64/SetJumpLongJump.asm
@@ -59,7 +59,7 @@ SetJump
FPR_LAYOUT
#undef REG_PAIR
#undef REG_ONE
- mov w0, #0
+ mov x0, #0
ret
;/**
@@ -88,10 +88,10 @@ InternalLongJump
#undef REG_PAIR
#undef REG_ONE
mov sp, x16
- cmp w1, #0
- mov w0, #1
+ cmp x1, #0
+ mov x0, #1
beq exit
- mov w0, w1
+ mov x0, x1
exit
// use br not ret, as ret is guaranteed to mispredict
br x30
--
2.30.2