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[PULL,02/10] linux-user/alpha: Fix sigsuspend for big-endian hosts

Message ID 20220324082016.3463521-3-laurent@vivier.eu
State Accepted
Commit 7fb5ef350bb434644fe1ac8eeb973543e017c932
Headers show
Series None | expand

Commit Message

Laurent Vivier March 24, 2022, 8:20 a.m. UTC 
From: Richard Henderson <richard.henderson@linaro.org>

On alpha, the sigset argument for sigsuspend is in a register.
When we drop that into memory that happens in host-endianness,
but target_to_host_old_sigset will treat it as target-endianness.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20220315084308.433109-2-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
---
 linux-user/syscall.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 75ed71eb461d..77cd88b53785 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -9559,7 +9559,8 @@  static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
         {
             TaskState *ts = cpu->opaque;
 #if defined(TARGET_ALPHA)
-            abi_ulong mask = arg1;
+            /* target_to_host_old_sigset will bswap back */
+            abi_ulong mask = tswapal(arg1);
             target_to_host_old_sigset(&ts->sigsuspend_mask, &mask);
 #else
             if (!(p = lock_user(VERIFY_READ, arg1, sizeof(target_sigset_t), 1)))