This patch adds the readlinkat syscall to linux-user.
Index: qemu/linux-user/syscall.c
===================================================================
--- qemu.orig/linux-user/syscall.c 2007-09-19 06:26:51.000000000 -0600
+++ qemu/linux-user/syscall.c 2007-09-19 06:27:29.000000000 -0600
@@ -160,6 +160,7 @@
#define __NR_sys_mkdirat __NR_mkdirat
#define __NR_sys_mknodat __NR_mknodat
#define __NR_sys_openat __NR_openat
+#define __NR_sys_readlinkat __NR_readlinkat
#define __NR_sys_renameat __NR_renameat
#define __NR_sys_rt_sigqueueinfo __NR_rt_sigqueueinfo
#define __NR_sys_symlinkat __NR_symlinkat
@@ -210,6 +211,10 @@
#if defined(TARGET_NR_openat) && defined(__NR_openat)
_syscall4(int,sys_openat,int,dirfd,const char *,pathname,int,flags,mode_t,mode)
#endif
+#if defined(TARGET_NR_readlinkat) && defined(__NR_readlinkat)
+_syscall4(int,sys_readlinkat,int,dirfd,const char *,pathname,
+ char *,buf,size_t,bufsize)
+#endif
#if defined(TARGET_NR_renameat) && defined(__NR_renameat)
_syscall4(int,sys_renameat,int,olddirfd,const char *,oldpath,
int,newdirfd,const char *,newpath)
@@ -3584,6 +3589,28 @@
unlock_user(p, arg1, 0);
}
break;
+#if defined(TARGET_NR_readlinkat) && defined(__NR_readlinkat)
+ case TARGET_NR_readlinkat:
+ if (!arg2 || !arg3) {
+ ret = -EFAULT;
+ goto fail;
+ }
+ {
+ void *p2 = NULL;
+ p = lock_user_string(arg2);
+ p2 = lock_user(arg3, arg4, 0);
+ if (!access_ok(VERIFY_READ, p, 1)
+ || !access_ok(VERIFY_READ, p2, 1))
+ ret = -EFAULT;
+ else
+ ret = get_errno(sys_readlinkat(arg1, path(p), p2, arg4));
+ if (p2)
+ unlock_user(p2, arg3, ret);
+ if (p)
+ unlock_user(p, arg2, 0);
+ }
+ break;
+#endif
#ifdef TARGET_NR_uselib
case TARGET_NR_uselib:
goto unimplemented;
Index: qemu/linux-user/arm/syscall_nr.h
===================================================================
--- qemu.orig/linux-user/arm/syscall_nr.h 2007-09-19 06:26:21.000000000 -0600
+++ qemu/linux-user/arm/syscall_nr.h 2007-09-19 06:26:57.000000000 -0600
@@ -334,4 +334,5 @@
#define TARGET_NR_renameat 329
#define TARGET_NR_linkat 330
#define TARGET_NR_symlinkat 331
+#define TARGET_NR_readlinkat 332
#define TARGET_NR_utimensat 348
