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ARC: Change calling convention of do_page_fault()

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switch the args (address, pt_regs) to match with all the other "C"
exception handlers.

This removes the awkwardness in EV_ProtV for page fault vs. unaligned
access.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta 2013-09-18 16:25:40 +05:30
parent d4599baf5c
commit 21a63b5604
3 changed files with 7 additions and 8 deletions
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9
arch/arc/kernel/entry.S
View File

@ -337,9 +337,9 @@ ARC_ENTRY EV_TLBProtV
; vineetg: Mar 6th: Random Seg Fault issue #1
; ecr and efa were not saved in case an Intr sneaks in
; after fake rtie
;
lr r2, [ecr]
lr r1, [efa] ; Faulting Data address
lr r0, [efa] ; Faulting Data address
; --------(4) Return from CPU Exception Mode ---------
; Fake a rtie, but rtie to next label
@ -348,6 +348,8 @@ ARC_ENTRY EV_TLBProtV
FAKE_RET_FROM_EXCPN r9
mov r1, sp
;------ (5) Type of Protection Violation? ----------
;
; ProtV Hardware Exception is triggered for Access Faults of 2 types
@ -358,14 +360,11 @@ ARC_ENTRY EV_TLBProtV
bbit1 r2, ECR_C_BIT_PROTV_MISALIG_DATA, 4f
;========= (6a) Access Violation Processing ========
mov r0, sp ; pt_regs
bl do_page_fault
b ret_from_exception
;========== (6b) Non aligned access ============
4:
mov r0, r1
mov r1, sp ; pt_regs
#ifdef CONFIG_ARC_MISALIGN_ACCESS
SAVE_CALLEE_SAVED_USER

2
arch/arc/mm/fault.c
View File

@ -52,7 +52,7 @@ static int handle_vmalloc_fault(unsigned long address)
return 1;
}
void do_page_fault(struct pt_regs *regs, unsigned long address)
void do_page_fault(unsigned long address, struct pt_regs *regs)
{
struct vm_area_struct *vma = NULL;
struct task_struct *tsk = current;

4
arch/arc/mm/tlbex.S
View File

@ -369,8 +369,8 @@ do_slow_path_pf:
EXCEPTION_PROLOGUE
; ------- setup args for Linux Page fault Hanlder ---------
mov_s r0, sp
lr r1, [efa]
mov_s r1, sp
lr r0, [efa]
; We don't want exceptions to be disabled while the fault is handled.
; Now that we have saved the context we return from exception hence