From f2d34df3c1a88a2cf86eb0afc88c369d799ae431 Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Mon, 6 Nov 2017 18:33:23 +0000 Subject: linux-user/s390x: Mask si_addr for SIGSEGV MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit For s390x, the address passed to a signal handler in the siginfo_t si_addr field is masked (in the kernel this is done in do_sigbus() and do_sigsegv() in arch/s390/mm/fault.c). Implement this architecture-specific oddity in linux-user. This is one of the issues described in https://bugs.launchpad.net/qemu/+bug/1705118 Reviewed-by: Laurent Vivier Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Peter Maydell Signed-off-by: Riku Voipio --- linux-user/main.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'linux-user') diff --git a/linux-user/main.c b/linux-user/main.c index aa02f25b85..b6dd9efd2d 100644 --- a/linux-user/main.c +++ b/linux-user/main.c @@ -3238,6 +3238,10 @@ void cpu_loop(CPUAlphaState *env) #endif /* TARGET_ALPHA */ #ifdef TARGET_S390X + +/* s390x masks the fault address it reports in si_addr for SIGSEGV and SIGBUS */ +#define S390X_FAIL_ADDR_MASK -4096LL + void cpu_loop(CPUS390XState *env) { CPUState *cs = CPU(s390_env_get_cpu(env)); @@ -3294,7 +3298,7 @@ void cpu_loop(CPUS390XState *env) sig = TARGET_SIGSEGV; /* XXX: check env->error_code */ n = TARGET_SEGV_MAPERR; - addr = env->__excp_addr; + addr = env->__excp_addr & S390X_FAIL_ADDR_MASK; goto do_signal; case PGM_EXECUTE: case PGM_SPECIFICATION: -- cgit v1.2.1