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| author | Warner Losh | 2022-01-09 01:55:56 +0100 |
|---|---|---|
| committer | Warner Losh | 2022-01-28 23:53:41 +0100 |
| commit | aae57ac37a8803cdd39a732491718b6ee772bb3d (patch) | |
| tree | 7dd9aa84cab1af5a0525666a98e2dae7e6a12155 /bsd-user | |
| parent | bsd-user/signal.c: host_to_target_siginfo_noswap (diff) | |
| download | qemu-aae57ac37a8803cdd39a732491718b6ee772bb3d.tar.gz qemu-aae57ac37a8803cdd39a732491718b6ee772bb3d.tar.xz qemu-aae57ac37a8803cdd39a732491718b6ee772bb3d.zip | |
bsd-user/signal.c: Implement rewind_if_in_safe_syscall
Signed-off-by: Kyle Evans <kevans@freebsd.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'bsd-user')
| -rw-r--r-- | bsd-user/qemu.h | 2 | ||||
| -rw-r--r-- | bsd-user/signal.c | 13 |
2 files changed, 14 insertions, 1 deletions
diff --git a/bsd-user/qemu.h b/bsd-user/qemu.h index 49f01932a5..8ed1bfbca8 100644 --- a/bsd-user/qemu.h +++ b/bsd-user/qemu.h @@ -446,4 +446,6 @@ static inline void *lock_user_string(abi_ulong guest_addr) #include <pthread.h> +#include "user/safe-syscall.h" + #endif /* QEMU_H */ diff --git a/bsd-user/signal.c b/bsd-user/signal.c index db8cf0a08f..454aef2993 100644 --- a/bsd-user/signal.c +++ b/bsd-user/signal.c @@ -48,6 +48,18 @@ int target_to_host_signal(int sig) return sig; } +/* Adjust the signal context to rewind out of safe-syscall if we're in it */ +static inline void rewind_if_in_safe_syscall(void *puc) +{ + ucontext_t *uc = (ucontext_t *)puc; + uintptr_t pcreg = host_signal_pc(uc); + + if (pcreg > (uintptr_t)safe_syscall_start + && pcreg < (uintptr_t)safe_syscall_end) { + host_signal_set_pc(uc, (uintptr_t)safe_syscall_start); + } +} + static bool has_trapno(int tsig) { return tsig == TARGET_SIGILL || @@ -57,7 +69,6 @@ static bool has_trapno(int tsig) tsig == TARGET_SIGTRAP; } - /* Siginfo conversion. */ /* |