Sparc64 is unique on linux in *not* passing ucontext_t as
the third argument to a SA_SIGINFO handler.  It passes the
old struct sigcontext instead.t log

Fixes: 8b5bd461935b ("linux-user/host/sparc: Populate host_signal.h")
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 linux-user/include/host/sparc64/host-signal.h | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/linux-user/include/host/sparc64/host-signal.h b/linux-user/include/host/sparc64/host-signal.h
index f8a8a4908d..64957c2bca 100644
--- a/linux-user/include/host/sparc64/host-signal.h
+++ b/linux-user/include/host/sparc64/host-signal.h
@@ -11,22 +11,23 @@
 #ifndef SPARC64_HOST_SIGNAL_H
 #define SPARC64_HOST_SIGNAL_H
 
-/* FIXME: the third argument to a SA_SIGINFO handler is *not* ucontext_t. */
-typedef ucontext_t host_sigcontext;
+/* The third argument to a SA_SIGINFO handler is struct sigcontext.  */
+typedef struct sigcontext host_sigcontext;
 
-static inline uintptr_t host_signal_pc(host_sigcontext *uc)
+static inline uintptr_t host_signal_pc(host_sigcontext *sc)
 {
-    return uc->uc_mcontext.mc_gregs[MC_PC];
+    return sc->sigc_regs.tpc;
 }
 
-static inline void host_signal_set_pc(host_sigcontext *uc, uintptr_t pc)
+static inline void host_signal_set_pc(host_sigcontext *sc, uintptr_t pc)
 {
-    uc->uc_mcontext.mc_gregs[MC_PC] = pc;
+    sc->sigc_regs.tpc = pc;
+    sc->sigc_regs.tnpc = pc + 4;
 }
 
-static inline void *host_signal_mask(host_sigcontext *uc)
+static inline void *host_signal_mask(host_sigcontext *sc)
 {
-    return &uc->uc_sigmask;
+    return &sc->sigc_mask;
 }
 
 static inline bool host_signal_write(siginfo_t *info, host_sigcontext *uc)
-- 
2.25.1

On Tue, 8 Feb 2022 at 07:46, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> Sparc64 is unique on linux in *not* passing ucontext_t as
> the third argument to a SA_SIGINFO handler.  It passes the
> old struct sigcontext instead.t log

Stray bit of text at the end of the commit message here.

>
> Fixes: 8b5bd461935b ("linux-user/host/sparc: Populate host_signal.h")
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>  linux-user/include/host/sparc64/host-signal.h | 17 +++++++++--------
>  1 file changed, 9 insertions(+), 8 deletions(-)
>

Otherwise


Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

thanks
-- PMM