Le 05/11/2020 à 22:23, Peter Maydell a écrit :
> The function do_sigreturn() tries to store the PC, NPC and PSR in
> uint32_t local variables, which implicitly drops the high half of
> these fields for 64-bit guests.
>
> The usual effect was that a guest which used signals would crash on
> return from a signal unless it was lucky enough to take it while the
> PC was in the low 4GB of the address space. In particular, Debian
> /bin/dash and /bin/bash would segfault after executing external
> commands.
>
> Use abi_ulong, which is the type these fields all have in the
> __siginfo_t struct.
>
> Signed-off-by: Peter Maydell <peter.mayd...@linaro.org>
> ---
> linux-user/sparc/signal.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/linux-user/sparc/signal.c b/linux-user/sparc/signal.c
> index c315704b389..d12adc8e6ff 100644
> --- a/linux-user/sparc/signal.c
> +++ b/linux-user/sparc/signal.c
> @@ -247,7 +247,7 @@ long do_sigreturn(CPUSPARCState *env)
> {
> abi_ulong sf_addr;
> struct target_signal_frame *sf;
> - uint32_t up_psr, pc, npc;
> + abi_ulong up_psr, pc, npc;
> target_sigset_t set;
> sigset_t host_set;
> int i;
>
Applied to my linux-user-for-5.2 branch.
Thanks,
Laurent
