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ArmPkg/CpuDxe: Removed LR adjustement for SVC call 

The Link Register (LR) does not need adjustement when receiving a Supervisor Call (SVC).
Note: SVC might be generated by debuggers.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14911 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Olivier Martin 2013-11-28 21:38:56 +00:00 committed by oliviermartin
parent d4c92adef7
commit 71fd27cbee
2 changed files with 0 additions and 2 deletions
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1
ArmPkg/Drivers/CpuDxe/ArmV6/ExceptionSupport.S
View File

@ -120,7 +120,6 @@ ASM_PFX(UndefinedInstructionEntry):
bx R1
ASM_PFX(SoftwareInterruptEntry):
sub LR, LR, #4 @ Only -2 for Thumb, adjust in CommonExceptionEntry
srsdb #0x13! @ Store return state on SVC stack
@ We are already in SVC mode
stmfd SP!,{LR} @ Store the link register for the current mode

1
ArmPkg/Drivers/CpuDxe/ArmV6/ExceptionSupport.asm
View File

@ -115,7 +115,6 @@ UndefinedInstructionEntry
bx R1
SoftwareInterruptEntry
sub LR, LR, #4 ; Only -2 for Thumb, adjust in CommonExceptionEntry
srsfd #0x13! ; Store return state on SVC stack
; We are already in SVC mode
stmfd SP!,{LR} ; Store the link register for the current mode