[PATCH] linux-user/syscall: xtensa: fix target_msqid_ds and ipc_perm conversion

[Max Filippov <jcmvbkbc@gmail.com>]

- target_ipc_perm::mode and target_ipc_perm::__seq fields are 32-bit wide
  on xtensa and thus need to use tswap32
- target_msqid_ds::msg_*time field pairs are reversed on big-endian
  xtensa
Both issues result in incorrect conversion results on big-endian xtensa
targets, spotted by the libc-test http://nsz.repo.hu/git/?p=libc-test

Cc: qemu-stable@nongnu.org
Fixes: a3da8be5126b ("target/xtensa: linux-user: fix sysv IPC structures")
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
---
 linux-user/syscall.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index e384e1424890..cb334e90d6f0 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -3758,12 +3758,13 @@ static inline abi_long target_to_host_ipc_perm(struct ipc_perm *host_ip,
     host_ip->gid = tswap32(target_ip->gid);
     host_ip->cuid = tswap32(target_ip->cuid);
     host_ip->cgid = tswap32(target_ip->cgid);
-#if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_PPC)
+#if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_PPC) || \
+    defined(TARGET_XTENSA)
     host_ip->mode = tswap32(target_ip->mode);
 #else
     host_ip->mode = tswap16(target_ip->mode);
 #endif
-#if defined(TARGET_PPC)
+#if defined(TARGET_PPC) || defined(TARGET_XTENSA)
     host_ip->__seq = tswap32(target_ip->__seq);
 #else
     host_ip->__seq = tswap16(target_ip->__seq);
@@ -3786,12 +3787,13 @@ static inline abi_long host_to_target_ipc_perm(abi_ulong target_addr,
     target_ip->gid = tswap32(host_ip->gid);
     target_ip->cuid = tswap32(host_ip->cuid);
     target_ip->cgid = tswap32(host_ip->cgid);
-#if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_PPC)
+#if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_PPC) || \
+    defined(TARGET_XTENSA)
     target_ip->mode = tswap32(host_ip->mode);
 #else
     target_ip->mode = tswap16(host_ip->mode);
 #endif
-#if defined(TARGET_PPC)
+#if defined(TARGET_PPC) || defined(TARGET_XTENSA)
     target_ip->__seq = tswap32(host_ip->__seq);
 #else
     target_ip->__seq = tswap16(host_ip->__seq);
@@ -4111,6 +4113,14 @@ static inline abi_long do_semtimedop(int semid,
 struct target_msqid_ds
 {
     struct target_ipc_perm msg_perm;
+#if defined(TARGET_XTENSA) && TARGET_BIG_ENDIAN
+    abi_ulong __unused1;
+    abi_ulong msg_stime;
+    abi_ulong __unused2;
+    abi_ulong msg_rtime;
+    abi_ulong __unused3;
+    abi_ulong msg_ctime;
+#else
     abi_ulong msg_stime;
 #if TARGET_ABI_BITS == 32
     abi_ulong __unused1;
@@ -4122,6 +4132,7 @@ struct target_msqid_ds
     abi_ulong msg_ctime;
 #if TARGET_ABI_BITS == 32
     abi_ulong __unused3;
+#endif
 #endif
     abi_ulong __msg_cbytes;
     abi_ulong msg_qnum;
-- 
2.39.2