mprotect system call exposed to the untrusted code.

src/untrusted/irt/irt.h

Index: src/untrusted/irt/irt.h
diff --git a/src/untrusted/irt/irt.h b/src/untrusted/irt/irt.h
index d417be8fe41ad4f9427beed790f6564a9f19bab8..5b1e0b892702c4579249a8a40bec290d8685676a 100644
--- a/src/untrusted/irt/irt.h
+++ b/src/untrusted/irt/irt.h
@@ -91,6 +91,7 @@ struct nacl_irt_memory {
   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);

[Mark Seaborn, 2012/10/25 17:05:36]

Don't add mprotect() to this interface.  I assume this is just a mistake left
over from a previous version.

[Petr Hosek, 2012/10/25 18:46:57]

Yes, sorry I have completely forgotten to remove mprotect from the interface.

 };
 
 #define NACL_IRT_DYNCODE_v0_1   "nacl-irt-dyncode-0.1"
@@ -193,6 +194,15 @@ struct nacl_irt_dev_exception_handling {
   int (*exception_clear_flag)(void);
 };
 
+/*
+ * NOTE: This is a 'dev' interface which is NOT stable.
+ * In the future, requests for this interface will fail.
+ */
+#define NACL_IRT_DEV_MPROTECT_v0_1 "nacl-irt-dev-mprotect-0.1"
+struct nacl_irt_dev_mprotect {
+  int (*mprotect)(void *addr, size_t len, int prot);
+};
+
 #if defined(__cplusplus)
 }
 #endif