diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2019-09-06 09:57:13 -0700 |
|---|---|---|
| committer | Laurent Vivier <laurent@vivier.eu> | 2019-09-11 08:47:06 +0200 |
| commit | 130ea8322bd01b27095079632f1946d9a2120870 (patch) | |
| tree | 877a743f8b87d77b757ca3849ade8424cb032d14 /target/xtensa/cpu.h | |
| parent | dc12567a53c88d7a91b9d71db3775782c7f35c84 (diff) | |
target/xtensa: linux-user: add call0 ABI support
Xtensa binaries built for call0 ABI don't rotate register window on
function calls and returns. Invocation of signal handlers from the
kernel is therefore different in windowed and call0 ABIs.
There's currently no way to determine xtensa ELF binary ABI from the
binary itself. Add handler for the -xtensa-abi-call0 command line
parameter/QEMU_XTENSA_ABI_CALL0 envitonment variable to the qemu-user
and record ABI choice. Use it to initialize PS.WOE in xtensa_cpu_reset.
Check PS.WOE in setup_rt_frame to determine how a signal should be
delivered.
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Message-Id: <20190906165713.5558-1-jcmvbkbc@gmail.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Diffstat (limited to 'target/xtensa/cpu.h')
| -rw-r--r-- | target/xtensa/cpu.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/target/xtensa/cpu.h b/target/xtensa/cpu.h index 0459243e6b..b363ffcf10 100644 --- a/target/xtensa/cpu.h +++ b/target/xtensa/cpu.h @@ -673,6 +673,9 @@ static inline MemoryRegion *xtensa_get_er_region(CPUXtensaState *env) { return env->system_er; } +#else +void xtensa_set_abi_call0(void); +bool xtensa_abi_call0(void); #endif static inline uint32_t xtensa_replicate_windowstart(CPUXtensaState *env) |