[Qemu-devel] [PULL 14/14] linux-user: correct stat structure in MIPS N32

[Leon Alrae <leon.alrae@imgtec.com>]

Simple "hello world" MIPS N32 userland program crashes with segfault due to
incorrectly defined stat structure in QEMU.

Correct "target_stat" definition to match kernel's "stat64" as in MIPS N32
there are only plain "stat" syscalls using 64-bit structure.

Reported-by: Daniel Sanders <daniel.sanders@imgtec.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
Tested-by: Daniel Sanders <daniel.sanders@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
---
 linux-user/syscall_defs.h | 86 +++++++++++------------------------------------
 1 file changed, 19 insertions(+), 67 deletions(-)

diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index 9ed6de8..edd5f3c 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -1607,73 +1607,25 @@ struct target_stat {
 #elif defined(TARGET_ABI_MIPSN32)
 
 struct target_stat {
-	unsigned	st_dev;
-	int		st_pad1[3];		/* Reserved for network id */
-	unsigned int	st_ino;
-	unsigned int	st_mode;
-	unsigned int	st_nlink;
-	int		st_uid;
-	int		st_gid;
-	unsigned 	st_rdev;
-	unsigned int	st_pad2[2];
-	unsigned int	st_size;
-	unsigned int	st_pad3;
-	/*
-	 * Actually this should be timestruc_t st_atime, st_mtime and st_ctime
-	 * but we don't have it under Linux.
-	 */
-	unsigned int		target_st_atime;
-	unsigned int		target_st_atime_nsec;
-	unsigned int		target_st_mtime;
-	unsigned int		target_st_mtime_nsec;
-	unsigned int		target_st_ctime;
-	unsigned int		target_st_ctime_nsec;
-	unsigned int		st_blksize;
-	unsigned int		st_blocks;
-	unsigned int		st_pad4[14];
-};
-
-/*
- * This matches struct stat64 in glibc2.1, hence the absolutely insane
- * amounts of padding around dev_t's.  The memory layout is the same as of
- * struct stat of the 64-bit kernel.
- */
-
-#define TARGET_HAS_STRUCT_STAT64
-struct target_stat64 {
-	unsigned int	st_dev;
-	unsigned int	st_pad0[3];	/* Reserved for st_dev expansion  */
-
-	target_ulong	st_ino;
-
-        unsigned int	st_mode;
-        unsigned int	st_nlink;
-
-	int		st_uid;
-	int		st_gid;
-
-	unsigned int	st_rdev;
-	unsigned int	st_pad1[3];	/* Reserved for st_rdev expansion  */
-
-	int		st_size;
-
-	/*
-	 * Actually this should be timestruc_t st_atime, st_mtime and st_ctime
-	 * but we don't have it under Linux.
-	 */
-	int		target_st_atime;
-	unsigned int	target_st_atime_nsec;	/* Reserved for st_atime expansion  */
-
-	int		target_st_mtime;
-	unsigned int	target_st_mtime_nsec;	/* Reserved for st_mtime expansion  */
-
-	int		target_st_ctime;
-	unsigned int	target_st_ctime_nsec;	/* Reserved for st_ctime expansion  */
-
-	unsigned int	st_blksize;
-	unsigned int	st_pad2;
-
-	int		st_blocks;
+        abi_ulong    st_dev;
+        abi_ulong    st_pad0[3]; /* Reserved for st_dev expansion */
+        uint64_t     st_ino;
+        unsigned int st_mode;
+        unsigned int st_nlink;
+        int          st_uid;
+        int          st_gid;
+        abi_ulong    st_rdev;
+        abi_ulong    st_pad1[3]; /* Reserved for st_rdev expansion */
+        int64_t      st_size;
+        abi_long     target_st_atime;
+        abi_ulong    target_st_atime_nsec; /* Reserved for st_atime expansion */
+        abi_long     target_st_mtime;
+        abi_ulong    target_st_mtime_nsec; /* Reserved for st_mtime expansion */
+        abi_long     target_st_ctime;
+        abi_ulong    target_st_ctime_nsec; /* Reserved for st_ctime expansion */
+        abi_ulong    st_blksize;
+        abi_ulong    st_pad2;
+        int64_t      st_blocks;
 };
 
 #elif defined(TARGET_ABI_MIPSO32)
-- 
2.1.0