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/include | |
| 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/include')
| -rw-r--r-- | arch/xtensa/include/asm/thread_info.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/thread_info.h b/arch/xtensa/include/asm/thread_info.h index 52974317a6b6..326db1c1d5d8 100644 --- a/arch/xtensa/include/asm/thread_info.h +++ b/arch/xtensa/include/asm/thread_info.h @@ -56,6 +56,10 @@ struct thread_info { /* result of the most recent exclusive store */ unsigned long atomctl8; #endif +#ifdef CONFIG_USER_ABI_CALL0_PROBE + /* Address where PS.WOE was enabled by the ABI probing code */ + unsigned long ps_woe_fix_addr; +#endif /* * If i-th bit is set then coprocessor state is loaded into the |