diff options
| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-03-12 12:50:43 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-03-29 13:22:10 +1100 |
| commit | a305597850c96e2f2d349533cf3b514fa4b7b9f8 (patch) | |
| tree | bf7a230c5e9b29c54a5f1fbc8935b63a1d0628c4 /arch/powerpc/kernel/head_32.h | |
| parent | acc142b6230eb2d9cec9b9e3baac1bc074df8ba3 (diff) | |
powerpc/32: Refactor saving of volatile registers in exception prologs
Exception prologs all do the same at the end:
- Save trapno in stack
- Mark stack with exception marker
- Save r0
- Save r3 to r8
Refactor that into a COMMON_EXCEPTION_PROLOG_END macro.
At the same time use r1 instead of r11.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/e1c45d2e895e0693c42d2a6840df1105a148efea.1615552867.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/kernel/head_32.h')
| -rw-r--r-- | arch/powerpc/kernel/head_32.h | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/arch/powerpc/kernel/head_32.h b/arch/powerpc/kernel/head_32.h index 84e6251622e8..ba20bfabdf63 100644 --- a/arch/powerpc/kernel/head_32.h +++ b/arch/powerpc/kernel/head_32.h @@ -104,15 +104,19 @@ li r10, MSR_KERNEL /* can take exceptions */ mtmsr r10 /* (except for mach check in rtas) */ #endif - stw r0,GPR0(r11) + COMMON_EXCEPTION_PROLOG_END \trapno +_ASM_NOKPROBE_SYMBOL(\name\()_virt) +.endm + +.macro COMMON_EXCEPTION_PROLOG_END trapno + stw r0,GPR0(r1) lis r10,STACK_FRAME_REGS_MARKER@ha /* exception frame marker */ addi r10,r10,STACK_FRAME_REGS_MARKER@l - stw r10,8(r11) + stw r10,8(r1) li r10, \trapno - stw r10,_TRAP(r11) - SAVE_4GPRS(3, r11) - SAVE_2GPRS(7, r11) -_ASM_NOKPROBE_SYMBOL(\name\()_virt) + stw r10,_TRAP(r1) + SAVE_4GPRS(3, r1) + SAVE_2GPRS(7, r1) .endm .macro prepare_transfer_to_handler |