From: Richard Henderson <[email protected]> This has been a fixme for some time. The effect of returning -EFAULT from the kernel code is to raise SIGSEGV.
Reviewed-by: Peter Maydell <[email protected]> Signed-off-by: Richard Henderson <[email protected]> Message-Id: <[email protected]> Signed-off-by: Laurent Vivier <[email protected]> --- linux-user/i386/signal.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/linux-user/i386/signal.c b/linux-user/i386/signal.c index b38b5f108eaf..433efa3d693b 100644 --- a/linux-user/i386/signal.c +++ b/linux-user/i386/signal.c @@ -421,19 +421,18 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, /* Set up to return from userspace. If provided, use a stub already in userspace. */ -#ifndef TARGET_X86_64 if (ka->sa_flags & TARGET_SA_RESTORER) { __put_user(ka->sa_restorer, &frame->pretcode); } else { +#ifdef TARGET_X86_64 + /* For x86_64, SA_RESTORER is required ABI. */ + goto give_sigsegv; +#else /* This is no longer used, but is retained for ABI compatibility. */ install_rt_sigtramp(frame->retcode); __put_user(default_rt_sigreturn, &frame->pretcode); - } -#else - /* XXX: Would be slightly better to return -EFAULT here if test fails - assert(ka->sa_flags & TARGET_SA_RESTORER); */ - __put_user(ka->sa_restorer, &frame->pretcode); #endif + } /* Set up registers for signal handler */ env->regs[R_ESP] = frame_addr; -- 2.31.1
