[PATCH v3 1/2] linux-user: refactor ipc syscall

[Matus Kysel]

Refactoring ipc syscall for s390x and SPARC, so it matches glibc implementation

Signed-off-by: Matus Kysel <mkysel@tachyum.com>
---
 linux-user/syscall.c | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 97de9fb5c9..990412733b 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -814,9 +814,14 @@ safe_syscall4(int, clock_nanosleep, const clockid_t, 
clock, int, flags,
               const struct timespec *, req, struct timespec *, rem)
 #endif
 #ifdef __NR_ipc
+#ifdef __s390x__
+safe_syscall5(int, ipc, int, call, long, first, long, second, long, third,
+              void *, ptr)
+#else
 safe_syscall6(int, ipc, int, call, long, first, long, second, long, third,
               void *, ptr, long, fifth)
 #endif
+#endif
 #ifdef __NR_msgsnd
 safe_syscall4(int, msgsnd, int, msgid, const void *, msgp, size_t, sz,
               int, flags)
@@ -4053,8 +4058,13 @@ static inline abi_long do_msgsnd(int msqid, abi_long 
msgp,
 #endif
 #ifdef __NR_ipc
     if (ret == -TARGET_ENOSYS) {
+#ifdef __s390x__
+        ret = get_errno(safe_ipc(IPCOP_msgsnd, msqid, msgsz, msgflg,
+                                 host_mb));
+#else
         ret = get_errno(safe_ipc(IPCOP_msgsnd, msqid, msgsz, msgflg,
                                  host_mb, 0));
+#endif
     }
 #endif
     g_free(host_mb);
@@ -4063,6 +4073,20 @@ static inline abi_long do_msgsnd(int msqid, abi_long 
msgp,
     return ret;
 }
 
+#ifdef __NR_ipc
+#if defined(__sparc__)
+/* SPARC for msgrcv it does not use the kludge on final 2 arguments.  */
+#define MSGRCV_ARGS(__msgp, __msgtyp) __msgp, __msgtyp
+#elif defined(__s390x__)
+/* The s390 sys_ipc variant has only five parameters.  */
+#define MSGRCV_ARGS(__msgp, __msgtyp) \
+    ((long int[]){(long int)__msgp, __msgtyp})
+#else
+#define MSGRCV_ARGS(__msgp, __msgtyp) \
+    ((long int[]){(long int)__msgp, __msgtyp}), 0
+#endif
+#endif
+
 static inline abi_long do_msgrcv(int msqid, abi_long msgp,
                                  ssize_t msgsz, abi_long msgtyp,
                                  int msgflg)
@@ -4091,7 +4115,7 @@ static inline abi_long do_msgrcv(int msqid, abi_long msgp,
 #ifdef __NR_ipc
     if (ret == -TARGET_ENOSYS) {
         ret = get_errno(safe_ipc(IPCOP_CALL(1, IPCOP_msgrcv), msqid, msgsz,
-                        msgflg, host_mb, msgtyp));
+                        msgflg, MSGRCV_ARGS(host_mb, msgtyp)));
     }
 #endif
 
-- 
2.17.1