diff options
| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-03-12 12:50:33 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-03-29 13:22:07 +1100 |
| commit | e9f99704aafcdbd90ba20b81db2dae8526d8b8e5 (patch) | |
| tree | 1a93d1205ff925485eed1d337c7e88a30d67093b /arch/powerpc/kernel/head_32.h | |
| parent | 0f2793e33db2e2f062968f2ca789b6826972b05b (diff) | |
powerpc/32: Always save non volatile registers on exception entry
In preparation of handling exception entry and exit in C,
in order to simplify the handling, always save non volatile registers
when entering an exception.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/3ce8ced87a4f1467fa36fcc50763d53b45e466c1.1615552867.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/kernel/head_32.h')
| -rw-r--r-- | arch/powerpc/kernel/head_32.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/head_32.h b/arch/powerpc/kernel/head_32.h index e09585b88ba7..087445e45489 100644 --- a/arch/powerpc/kernel/head_32.h +++ b/arch/powerpc/kernel/head_32.h @@ -198,7 +198,7 @@ label: ret_from_except_full) #define EXC_XFER_LITE(n, hdlr) \ - EXC_XFER_TEMPLATE(hdlr, n+1, MSR_KERNEL, transfer_to_handler, \ + EXC_XFER_TEMPLATE(hdlr, n, MSR_KERNEL, transfer_to_handler, \ ret_from_except) .macro vmap_stack_overflow_exception @@ -215,7 +215,6 @@ vmap_stack_overflow: lwz r1, emergency_ctx@l(r1) addi r1, r1, THREAD_SIZE - INT_FRAME_SIZE EXCEPTION_PROLOG_2 vmap_stack_overflow - SAVE_NVGPRS(r11) addi r3, r1, STACK_FRAME_OVERHEAD EXC_XFER_STD(0, stack_overflow_exception) .endm |