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[PATCH 1/3] Mark ld.so internel mmap functions hidden
- From: "H.J. Lu" <hjl dot tools at gmail dot com>
- To: libc-alpha at sourceware dot org
- Cc: "H.J. Lu" <hjl dot tools at gmail dot com>
- Date: Sun, 18 Oct 2015 10:25:39 -0700
- Subject: [PATCH 1/3] Mark ld.so internel mmap functions hidden
- Authentication-results: sourceware.org; auth=none
Since ld.so internel mmap functions are only used internally in ld.so,
they can be made hidden.
[BZ #19122]
* include/sys/mman.h [IS_IN (rtld)] (__mmap): Add
attribute_hidden if not compiling for Hurd.
[IS_IN (rtld)] (__mprotect): Add attribute_hidden.
[IS_IN (rtld)] (__munmap): Likewise.
---
include/sys/mman.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/include/sys/mman.h b/include/sys/mman.h
index fd125ec..65fe3ff 100644
--- a/include/sys/mman.h
+++ b/include/sys/mman.h
@@ -16,6 +16,16 @@ libc_hidden_proto (__madvise)
/* This one is Linux specific. */
extern void *__mremap (void *__addr, size_t __old_len,
size_t __new_len, int __flags, ...);
+
+# if IS_IN (rtld)
+# ifndef __gnu_hurd__
+/* On Hurd, __mmap in ld.so will be preempted by the one in libc.so after
+ bootstrap. */
+extern __typeof (__mmap) __mmap attribute_hidden;
+# endif
+extern __typeof (__mprotect) __mprotect attribute_hidden;
+extern __typeof (__munmap) __munmap attribute_hidden;
+# endif
#endif
#endif
--
2.4.3