add pread64 and pwrite64 system calls

(Gary Thomas)


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4126 c046a42c-6fe2-441c-8c8c-71466251a162

linux-user/syscall.c

@@ -4874,6 +4874,20 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
         ret = get_errno(pwrite(arg1, p, arg3, arg4));
         unlock_user(p, arg2, 0);
         break;
+#endif
+#ifdef TARGET_NR_pread64
+    case TARGET_NR_pread64:
+        if (!(p = lock_user(VERIFY_WRITE, arg2, arg3, 0)))
+            goto efault;
+        ret = get_errno(pread64(arg1, p, arg3, target_offset64(arg4, arg5)));
+        unlock_user(p, arg2, ret);
+        break;
+    case TARGET_NR_pwrite64:
+        if (!(p = lock_user(VERIFY_READ, arg2, arg3, 1)))
+            goto efault;
+        ret = get_errno(pwrite64(arg1, p, arg3, target_offset64(arg4, arg5)));
+        unlock_user(p, arg2, 0);
+        break;
 #endif
     case TARGET_NR_getcwd:
         if (!(p = lock_user(VERIFY_WRITE, arg1, arg2, 0)))