[PATCH] linux-user: Add translation for argument of msync()

[Helge Deller]

msync() uses the flags MS_ASYNC, MS_INVALIDATE and MS_SYNC, which differ
between platforms, specifcally on alpha and hppa.

Add a target to host translation for those and wire up a nicer strace
output.

This fixes the testsuite of the macaulay2 debian package with a hppa-linux
guest on a x86-64 host.

Signed-off-by: Helge Deller <deller@gmx.de>

diff --git a/linux-user/alpha/target_mman.h b/linux-user/alpha/target_mman.h
index cd6e3d70a6..051544f5ab 100644
--- a/linux-user/alpha/target_mman.h
+++ b/linux-user/alpha/target_mman.h
@@ -3,6 +3,10 @@

 #define TARGET_MADV_DONTNEED 6

+#define TARGET_MS_ASYNC 1
+#define TARGET_MS_SYNC 2
+#define TARGET_MS_INVALIDATE 4
+
 #include "../generic/target_mman.h"

 #endif
diff --git a/linux-user/generic/target_mman.h b/linux-user/generic/target_mman.h
index 1436a3c543..32bf1a52d0 100644
--- a/linux-user/generic/target_mman.h
+++ b/linux-user/generic/target_mman.h
@@ -89,4 +89,17 @@
 #define TARGET_MADV_DONTNEED_LOCKED 24
 #endif

+
+#ifndef TARGET_MS_ASYNC
+#define TARGET_MS_ASYNC 1
+#endif
+
+#ifndef TARGET_MS_INVALIDATE
+#define TARGET_MS_INVALIDATE 2
+#endif
+
+#ifndef TARGET_MS_SYNC
+#define TARGET_MS_SYNC 4
+#endif
+
 #endif
diff --git a/linux-user/hppa/target_mman.h b/linux-user/hppa/target_mman.h
index 66dd9f7941..f9b6b97032 100644
--- a/linux-user/hppa/target_mman.h
+++ b/linux-user/hppa/target_mman.h
@@ -10,6 +10,10 @@
 #define TARGET_MADV_WIPEONFORK 71
 #define TARGET_MADV_KEEPONFORK 72

+#define TARGET_MS_SYNC 1
+#define TARGET_MS_ASYNC 2
+#define TARGET_MS_INVALIDATE 4
+
 #include "../generic/target_mman.h"

 #endif
diff --git a/linux-user/strace.list b/linux-user/strace.list
index a75101fca1..ac8f872371 100644
--- a/linux-user/strace.list
+++ b/linux-user/strace.list
@@ -650,7 +650,7 @@
 { TARGET_NR_msgsnd, "msgsnd" , NULL, NULL, NULL },
 #endif
 #ifdef TARGET_NR_msync
-{ TARGET_NR_msync, "msync" , NULL, NULL, NULL },
+{ TARGET_NR_msync, "msync" , "%s(%p,%u,%d)", NULL, NULL },
 #endif
 #ifdef TARGET_NR_multiplexer
 { TARGET_NR_multiplexer, "multiplexer" , NULL, NULL, NULL },
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index d58e9b8d10..e541fbe09a 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -22,6 +22,7 @@
 #include "qemu/path.h"
 #include "qemu/memfd.h"
 #include "qemu/queue.h"
+#include "target_mman.h"
 #include <elf.h>
 #include <endian.h>
 #include <grp.h>
@@ -7667,6 +7668,14 @@ static inline int target_to_host_mlockall_arg(int arg)
 }
 #endif

+static inline int target_to_host_msync_arg(abi_long arg)
+{
+    return ((arg & TARGET_MS_ASYNC) ? MS_ASYNC : 0) |
+           ((arg & TARGET_MS_INVALIDATE) ? MS_INVALIDATE : 0) |
+           ((arg & TARGET_MS_SYNC) ? MS_SYNC : 0) |
+           (arg & ~(TARGET_MS_ASYNC | TARGET_MS_INVALIDATE | TARGET_MS_SYNC));
+}
+
 #if (defined(TARGET_NR_stat64) || defined(TARGET_NR_lstat64) ||     \
      defined(TARGET_NR_fstat64) || defined(TARGET_NR_fstatat64) ||  \
      defined(TARGET_NR_newfstatat))
@@ -10163,7 +10172,8 @@ static abi_long do_syscall1(CPUArchState *cpu_env, int 
num, abi_long arg1,
         /* ??? msync/mlock/munlock are broken for softmmu.  */
 #ifdef TARGET_NR_msync
     case TARGET_NR_msync:
-        return get_errno(msync(g2h(cpu, arg1), arg2, arg3));
+        return get_errno(msync(g2h(cpu, arg1), arg2,
+                               target_to_host_msync_arg(arg3)));
 #endif
 #ifdef TARGET_NR_mlock
     case TARGET_NR_mlock: