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From: Peter Maydell <peter.maydell@linaro.org>
To: qemu-devel@nongnu.org
Subject: [PULL 01/48] linux-user/aarch64: Reset btype for signals
Date: Tue, 27 Oct 2020 11:43:51 +0000
Message-Id: <20201027114438.17662-2-peter.maydell@linaro.org>
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From: Richard Henderson <richard.henderson@linaro.org>
The kernel sets btype for the signal handler as if for a call.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20201021173749.111103-2-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
linux-user/aarch64/signal.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/linux-user/aarch64/signal.c b/linux-user/aarch64/signal.c
index d50c1ae5838..b591790c22e 100644
--- a/linux-user/aarch64/signal.c
+++ b/linux-user/aarch64/signal.c
@@ -506,10 +506,16 @@ static void target_setup_frame(int usig, struct targe=
t_sigaction *ka,
+ offsetof(struct target_rt_frame_record, tramp);
}
env->xregs[0] =3D usig;
- env->xregs[31] =3D frame_addr;
env->xregs[29] =3D frame_addr + fr_ofs;
- env->pc =3D ka->_sa_handler;
env->xregs[30] =3D return_addr;
+ env->xregs[31] =3D frame_addr;
+ env->pc =3D ka->_sa_handler;
+
+ /* Invoke the signal handler as if by indirect call. */
+ if (cpu_isar_feature(aa64_bti, env_archcpu(env))) {
+ env->btype =3D 2;
+ }
+
if (info) {
tswap_siginfo(&frame->info, info);
env->xregs[1] =3D frame_addr + offsetof(struct target_rt_sigframe,=
info);
--=20
2.20.1