[v7] user-only: Cleanup SIGSEGV and SIGBUS handling

[PATCH v7 60/60] linux-user: Handle BUS_ADRALN in host_signal_handler

Richard Henderson posted 60 patches 4 years, 3 months ago

Diff against v5 v6
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Maintainers: Artyom Tarasenko <atar4qemu@gmail.com>, Paolo Bonzini <pbonzini@redhat.com>, "Philippe Mathieu-Daudé" <f4bug@amsat.org>, Peter Maydell <peter.maydell@linaro.org>, David Gibson <david@gibson.dropbear.id.au>, Greg Kurz <groug@kaod.org>, "Edgar E. Iglesias" <edgar.iglesias@gmail.com>, Cornelia Huck <cohuck@redhat.com>, Aleksandar Rikalo <aleksandar.rikalo@syrmia.com>, Jiaxun Yang <jiaxun.yang@flygoat.com>, Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>, Laurent Vivier <laurent@vivier.eu>, Aurelien Jarno <aurelien@aurel32.net>, Thomas Huth <thuth@redhat.com>, Taylor Simpson <tsimpson@quicinc.com>, Riku Voipio <riku.voipio@iki.fi>, Richard Henderson <richard.henderson@linaro.org>

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[PATCH v7 60/60] linux-user: Handle BUS_ADRALN in host_signal_handler

Posted by Richard Henderson 4 years, 3 months ago

Handle BUS_ADRALN via cpu_loop_exit_sigbus, but allow other SIGBUS
si_codes to continue into the host-to-guest signal conversion code.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 linux-user/signal.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/linux-user/signal.c b/linux-user/signal.c
index df2c8678d0..81c45bfce9 100644
--- a/linux-user/signal.c
+++ b/linux-user/signal.c
@@ -860,6 +860,9 @@ static void host_signal_handler(int host_sig, siginfo_t *info, void *puc)
             cpu_loop_exit_sigsegv(cpu, guest_addr, access_type, maperr, pc);
         } else {
             sigprocmask(SIG_SETMASK, &uc->uc_sigmask, NULL);
+            if (info->si_code == BUS_ADRALN) {
+                cpu_loop_exit_sigbus(cpu, guest_addr, access_type, pc);
+            }
         }
 
         sync_sig = true;
-- 
2.25.1