Provide mprotect syscall

sysdeps/nacl/irt.h

 /*
  * Copyright (c) 2011 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef NATIVE_CLIENT_SRC_UNTRUSTED_IRT_IRT_H_
 #define NATIVE_CLIENT_SRC_UNTRUSTED_IRT_IRT_H_
 
 #include <stddef.h>
 #include <sys/types.h>
@@ skipping 60 matching lines @@
   int (*getdents)(int fd, struct dirent *, size_t count, size_t *nread);
 };
 
 #define NACL_IRT_FILENAME_v0_1      "nacl-irt-filename-0.1"
 struct nacl_irt_filename {
   int (*open)(const char *pathname, int oflag, mode_t cmode, int *newfd);
   int (*stat)(const char *pathname, struct stat *);
 };
 
 #define NACL_IRT_MEMORY_v0_1    "nacl-irt-memory-0.1"
-struct nacl_irt_memory {
+struct nacl_irt_memory_v0_1 {
   int (*sysbrk)(void **newbrk);
   int (*mmap)(void **addr, size_t len, int prot, int flags, int fd, off_t off);
   int (*munmap)(void *addr, size_t len);
 };
 
+#define NACL_IRT_MEMORY_v0_2    "nacl-irt-memory-0.2"
+struct nacl_irt_memory_v0_2 {
+  int (*sysbrk)(void **newbrk);
+  int (*mmap)(void **addr, size_t len, int prot, int flags, int fd, off_t off);
+  int (*munmap)(void *addr, size_t len);
+  int (*mprotect)(void *addr, size_t len, int prot);
+};
+
 #define NACL_IRT_DYNCODE_v0_1   "nacl-irt-dyncode-0.1"
 struct nacl_irt_dyncode {
   int (*dyncode_create)(void *dest, const void *src, size_t size);
   int (*dyncode_modify)(void *dest, const void *src, size_t size);
   int (*dyncode_delete)(void *dest, size_t size);
 };
 
 #define NACL_IRT_THREAD_v0_1   "nacl-irt-thread-0.1"
 struct nacl_irt_thread {
   int (*thread_create)(void *start_user_address, void *stack, void *thread_ptr);
@@ skipping 55 matching lines @@
 struct nacl_irt_clock {
   int (*getres)(clockid_t clk_id, struct timespec *res);
   int (*gettime)(clockid_t clk_id, struct timespec *tp);
 };
 
 #if __cplusplus
 }
 #endif
 
 #endif /* NATIVE_CLIENT_SRC_UNTRUSTED_IRT_IRT_H */