[Qemu-devel] Re: [PATCH] linux-user mknodat() syscall

[Thayne Harbaugh <thayne@c2.net>]

[-- Attachment #1: Type: text/plain, Size: 51 bytes --]

This patch adds the mknodat syscall to linux-user.

[-- Attachment #2: 26_mknodat.patch --]
[-- Type: text/x-patch, Size: 2160 bytes --]

Index: qemu/linux-user/syscall.c
===================================================================
--- qemu.orig/linux-user/syscall.c	2007-09-19 06:20:59.000000000 -0600
+++ qemu/linux-user/syscall.c	2007-09-19 06:21:49.000000000 -0600
@@ -156,6 +156,7 @@
 #define __NR_sys_getdents __NR_getdents
 #define __NR_sys_getdents64 __NR_getdents64
 #define __NR_sys_mkdirat __NR_mkdirat
+#define __NR_sys_mknodat __NR_mknodat
 #define __NR_sys_openat __NR_openat
 #define __NR_sys_rt_sigqueueinfo __NR_rt_sigqueueinfo
 #define __NR_sys_syslog __NR_syslog
@@ -189,6 +190,10 @@
 #if defined(TARGET_NR_mkdirat) && defined(__NR_mkdirat)
 _syscall3(int,sys_mkdirat,int,dirfd,const char *,pathname,mode_t,mode)
 #endif
+#if defined(TARGET_NR_mknodat) && defined(__NR_mknodat)
+_syscall4(int,sys_mknodat,int,dirfd,const char *,pathname,
+          mode_t,mode,dev_t,dev)
+#endif
 #if defined(TARGET_NR_openat) && defined(__NR_openat)
 _syscall4(int,sys_openat,int,dirfd,const char *,pathname,int,flags,mode_t,mode)
 #endif
@@ -2828,6 +2833,21 @@
         ret = get_errno(mknod(p, arg2, arg3));
         unlock_user(p, arg1, 0);
         break;
+#if defined(TARGET_NR_mknodat) && defined(__NR_mknodat)
+    case TARGET_NR_mknodat:
+        if (!arg2) {
+            ret = -EFAULT;
+            goto fail;
+        }
+        p = lock_user_string(arg2);
+        if (!access_ok(VERIFY_READ, p, 1))
+            ret = -EFAULT;
+        else
+            ret = get_errno(sys_mknodat(arg1, p, arg3, arg4));
+        if (p)
+            unlock_user(p, arg2, 0);
+        break;
+#endif
     case TARGET_NR_chmod:
         p = lock_user_string(arg1);
         ret = get_errno(chmod(p, arg2));
Index: qemu/linux-user/arm/syscall_nr.h
===================================================================
--- qemu.orig/linux-user/arm/syscall_nr.h	2007-09-19 06:20:24.000000000 -0600
+++ qemu/linux-user/arm/syscall_nr.h	2007-09-19 06:21:07.000000000 -0600
@@ -327,5 +327,6 @@
 #define TARGET_NR_set_mempolicy		321
 #define TARGET_NR_openat			322
 #define TARGET_NR_mkdirat			323
+#define TARGET_NR_mknodat			324
 #define TARGET_NR_futimesat			326
 #define TARGET_NR_utimensat			348