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>

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
 

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