diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2022-05-13 08:11:14 -0700 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2022-05-17 03:35:43 -0700 |
| commit | 5cc5f19f884a75f0bf96b95b4292fcc81effd755 (patch) | |
| tree | a751a2cec798c43780f333a1bd2d4d2583833c07 /arch/xtensa/kernel/asm-offsets.c | |
| parent | d74862007e0849fad8ba86447e6f05928f920640 (diff) | |
xtensa: improve call0 ABI probing
When call0 userspace ABI support by probing is enabled instructions that
cause illegal instruction exception when PS.WOE is clear are retried
with PS.WOE set before calling c-level exception handler. Record user pc
at which PS.WOE was set in the fast exception handler and clear PS.WOE
in the c-level exception handler if we get there from the same address.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa/kernel/asm-offsets.c')
| -rw-r--r-- | arch/xtensa/kernel/asm-offsets.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/xtensa/kernel/asm-offsets.c b/arch/xtensa/kernel/asm-offsets.c index 9a1db6ffcbf4..da38de20ae59 100644 --- a/arch/xtensa/kernel/asm-offsets.c +++ b/arch/xtensa/kernel/asm-offsets.c @@ -88,6 +88,9 @@ int main(void) OFFSET(TI_STSTUS, thread_info, status); OFFSET(TI_CPU, thread_info, cpu); OFFSET(TI_PRE_COUNT, thread_info, preempt_count); +#ifdef CONFIG_USER_ABI_CALL0_PROBE + OFFSET(TI_PS_WOE_FIX_ADDR, thread_info, ps_woe_fix_addr); +#endif /* struct thread_info (offset from start_struct) */ DEFINE(THREAD_RA, offsetof (struct task_struct, thread.ra)); |