提交 50f22fa6 编写于 作者: M Michael Weiser 提交者: Peter Maydell

linux-user: Fix endianess of aarch64 signal trampoline

Since for aarch64 the signal trampoline is synthesized directly into the
signal frame we need to make sure the instructions end up little-endian.
Otherwise the wrong endianness will cause a SIGILL upon return from the
signal handler on big-endian targets.
Signed-off-by: NMichael Weiser <michael.weiser@gmx.de>
Reviewed-by: NRichard Henderson <richard.henderson@linaro.org>
Message-id: 20171220212308.12614-4-michael.weiser@gmx.de
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
上级 cb3aa5fe
......@@ -1599,9 +1599,13 @@ static void target_setup_frame(int usig, struct target_sigaction *ka,
if (ka->sa_flags & TARGET_SA_RESTORER) {
return_addr = ka->sa_restorer;
} else {
/* mov x8,#__NR_rt_sigreturn; svc #0 */
__put_user(0xd2801168, &frame->tramp[0]);
__put_user(0xd4000001, &frame->tramp[1]);
/*
* mov x8,#__NR_rt_sigreturn; svc #0
* Since these are instructions they need to be put as little-endian
* regardless of target default or current CPU endianness.
*/
__put_user_e(0xd2801168, &frame->tramp[0], le);
__put_user_e(0xd4000001, &frame->tramp[1], le);
return_addr = frame_addr + offsetof(struct target_rt_sigframe, tramp);
}
env->xregs[0] = usig;
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册