Dear ArmPkg Maintainer,
The exception handling support code at
ArmPkg\Drivers\CpuDxe\ArmV6\ExceptionSupport.asm appears to adjust the stack
pointer in the wrong direction. It decrements the stack pointer by 0x60, but
this should be an increment (add) for the downward-growing stack.
NoAdjustNeeded
str R5, [SP, #0x3c] ; Store it in EFI_SYSTEM_CONTEXT_ARM.PC
sub R1, SP, #0x60 ; We pushed 0x60 bytes on the stack
str R1, [SP, #0x34] ; Store it in EFI_SYSTEM_CONTEXT_ARM.SP
; R0 is ExceptionType
mov R1,SP ; R1 is SystemContext
Contributed-under: TianoCore Contribution Agreement 1.0
Thanks,
Eugene
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