[Qemu-devel] Re: [PATCH] linux-user fstatat syscall

[Thayne Harbaugh <thayne@c2.net>]

[-- Attachment #1: Type: text/plain, Size: 102 bytes --]

This patch adds the fstatat syscall to linux-user.  To depends on the
previous stat64_put_user patch.

[-- Attachment #2: 35_fstatat64.patch --]
[-- Type: text/x-patch, Size: 3648 bytes --]

Index: qemu/linux-user/syscall.c
===================================================================
--- qemu.orig/linux-user/syscall.c	2007-09-19 06:28:34.000000000 -0600
+++ qemu/linux-user/syscall.c	2007-09-19 06:31:35.000000000 -0600
@@ -149,11 +149,26 @@
 	return syscall(__NR_##name, arg1, arg2, arg3, arg4, arg5, arg6);	\
 }
 
+#if defined(__NR_fstatat64)
+#define HOST_NR_FSTATAT __NR_fstatat64
+typedef struct stat64 host_statbuf_t;
+#elif defined(__NR_newfstatat)
+#define HOST_NR_FSTATAT __NR_newfstatat
+typedef struct stat host_statbuf_t;
+#endif
+#if defined(TARGET_NR_fstatat64)
+#define TARGET_NR_FSTATAT (TARGET_NR_fstatat64)
+typedef struct target_stat64 target_statbuf_t;
+#elif defined(TARGET_NR_newfstatat)
+#define TARGET_NR_FSTATAT (TARGET_NR_newfstatat)
+typedef struct target_stat target_statbuf_t;
+#endif
 
 #define __NR_sys_uname __NR_uname
 #define __NR_sys_faccessat __NR_faccessat
 #define __NR_sys_fchmodat __NR_fchmodat
 #define __NR_sys_fchownat __NR_fchownat
+#define __NR_sys_fstatat HOST_NR_FSTATAT
 #define __NR_sys_futimesat __NR_futimesat
 #define __NR_sys_getcwd1 __NR_getcwd
 #define __NR_sys_getdents __NR_getdents
@@ -170,6 +185,9 @@
 #define __NR_sys_tgkill __NR_tgkill
 #define __NR_sys_tkill __NR_tkill
 #define __NR_sys_unlinkat __NR_unlinkat
+#if !defined(__NR_utimensat) && defined(__x86_64__)
+#define __NR_utimensat		280
+#endif
 #define __NR_sys_utimensat __NR_utimensat
 
 #if defined(__alpha__) || defined (__ia64__) || defined(__x86_64__)
@@ -199,6 +217,10 @@
 _syscall3(int,sys_futimesat,int,dirfd,const char *,pathname,
           const struct timeval *,times)
 #endif
+#if defined(TARGET_NR_FSTATAT) && (HOST_NR_FSTATAT)
+_syscall4(int,sys_fstatat,int,dirfd,const char *,pathname,
+          host_statbuf_t *,buf,int,flags)
+#endif
 _syscall2(int,sys_getcwd1,char *,buf,size_t,size)
 _syscall3(int, sys_getdents, uint, fd, struct dirent *, dirp, uint, count);
 #if defined(TARGET_NR_getdents64) && defined(__NR_getdents64)
@@ -533,7 +555,7 @@
 	 : copy_to_user_statbuf64((tsb),(hsb)))
 #else
 #define copy_to_user_statbuf64_wrapper(tsb,hsb)		\
-	copy_to_user_eabi_statbuf64((tsb),(hsb))
+	copy_to_user_statbuf64((tsb),(hsb))
 #endif
 
 #ifdef TARGET_ARM
@@ -4731,6 +4753,28 @@
             unlock_user(p, arg2, 0);
         break;
 #endif
+#if defined(TARGET_NR_FSTATAT) && defined(HOST_NR_FSTATAT)
+    case TARGET_NR_FSTATAT:
+        if (!arg2) {
+            ret = -EFAULT;
+            goto fail;
+        }
+        {
+            host_statbuf_t statbuf;
+            p = lock_user_string(arg2);
+            if (!access_ok(VERIFY_READ, p, 1))
+                ret = -EFAULT;
+            else {
+                ret = get_errno(sys_fstatat(arg1, path(p), &statbuf, arg4));
+                if (!is_error(ret)
+                    && copy_to_user_statbuf64_wrapper((struct target_stat64 *)arg3, &statbuf))
+                    ret = -EFAULT;
+            }
+            if (p)
+                unlock_user(p, arg2, 0);
+        }
+        break;
+#endif
 #ifdef TARGET_NR_setresuid
     case TARGET_NR_setresuid:
         ret = get_errno(setresuid(low2highuid(arg1),
Index: qemu/linux-user/arm/syscall_nr.h
===================================================================
--- qemu.orig/linux-user/arm/syscall_nr.h	2007-09-19 06:28:08.000000000 -0600
+++ qemu/linux-user/arm/syscall_nr.h	2007-09-19 06:29:54.000000000 -0600
@@ -330,6 +330,7 @@
 #define TARGET_NR_mknodat			324
 #define TARGET_NR_fchownat			325
 #define TARGET_NR_futimesat			326
+#define TARGET_NR_fstatat64			327
 #define TARGET_NR_unlinkat			328
 #define TARGET_NR_renameat			329
 #define TARGET_NR_linkat			330