| Message ID | 20210803171858.148394-1-iii@linux.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | linux-user: fix guest/host address mixup in i386 setup_rt_frame() | expand |
On 8/3/21 7:18 AM, Ilya Leoshkevich wrote: > setup_rt_frame() passes siginfo and ucontext host addresses to guest > signal handlers, causing problems when e.g. emulating x86_64 on s390x. > > Signed-off-by: Ilya Leoshkevich<iii@linux.ibm.com> > --- > linux-user/i386/signal.c | 8 ++++---- > 1 file changed, 4 insertions(+), 4 deletions(-) Reviewed-by: Richard Henderson <richard.henderson@linaro.org> r~
Le 03/08/2021 à 19:18, Ilya Leoshkevich a écrit : > setup_rt_frame() passes siginfo and ucontext host addresses to guest > signal handlers, causing problems when e.g. emulating x86_64 on s390x. > > Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> > --- > linux-user/i386/signal.c | 8 ++++---- > 1 file changed, 4 insertions(+), 4 deletions(-) > > diff --git a/linux-user/i386/signal.c b/linux-user/i386/signal.c > index 8701774e37..841cd19651 100644 > --- a/linux-user/i386/signal.c > +++ b/linux-user/i386/signal.c > @@ -436,13 +436,13 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, > > #ifndef TARGET_X86_64 > env->regs[R_EAX] = sig; > - env->regs[R_EDX] = (unsigned long)&frame->info; > - env->regs[R_ECX] = (unsigned long)&frame->uc; > + env->regs[R_EDX] = frame_addr + offsetof(struct rt_sigframe, info); > + env->regs[R_ECX] = frame_addr + offsetof(struct rt_sigframe, uc); > #else > env->regs[R_EAX] = 0; > env->regs[R_EDI] = sig; > - env->regs[R_ESI] = (unsigned long)&frame->info; > - env->regs[R_EDX] = (unsigned long)&frame->uc; > + env->regs[R_ESI] = frame_addr + offsetof(struct rt_sigframe, info); > + env->regs[R_EDX] = frame_addr + offsetof(struct rt_sigframe, uc); > #endif > > cpu_x86_load_seg(env, R_DS, __USER_DS); > Applied to my linux-user-for-6.1 branch. Thanks, Laurent
diff --git a/linux-user/i386/signal.c b/linux-user/i386/signal.c index 8701774e37..841cd19651 100644 --- a/linux-user/i386/signal.c +++ b/linux-user/i386/signal.c @@ -436,13 +436,13 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, #ifndef TARGET_X86_64 env->regs[R_EAX] = sig; - env->regs[R_EDX] = (unsigned long)&frame->info; - env->regs[R_ECX] = (unsigned long)&frame->uc; + env->regs[R_EDX] = frame_addr + offsetof(struct rt_sigframe, info); + env->regs[R_ECX] = frame_addr + offsetof(struct rt_sigframe, uc); #else env->regs[R_EAX] = 0; env->regs[R_EDI] = sig; - env->regs[R_ESI] = (unsigned long)&frame->info; - env->regs[R_EDX] = (unsigned long)&frame->uc; + env->regs[R_ESI] = frame_addr + offsetof(struct rt_sigframe, info); + env->regs[R_EDX] = frame_addr + offsetof(struct rt_sigframe, uc); #endif cpu_x86_load_seg(env, R_DS, __USER_DS);
setup_rt_frame() passes siginfo and ucontext host addresses to guest signal handlers, causing problems when e.g. emulating x86_64 on s390x. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> --- linux-user/i386/signal.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)