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Mark ld.so internal mmap functions hidden in ld.so

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Since ld.so internal mmap functions are only used internally in ld.so,
they can be made hidden.  Don't hide __mmap on Hurd, since __mmap in
ld.so will be preempted by the one in libc.so after bootstrap.

	 [BZ #19122]
	 * include/sys/mman.h [IS_IN (rtld)]: Include <dl-mman.h>.
	 * sysdeps/generic/dl-mman.h: New file.
	 * sysdeps/mach/hurd/dl-mman.h: Likewise.
This commit is contained in:
H.J. Lu 2016-01-06 11:28:04 -08:00
parent 084e7d57bb
commit 38acf35697
4 changed files with 56 additions and 0 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2016-01-05 H.J. Lu <hongjiu.lu@intel.com>
[BZ #19122]
* include/sys/mman.h [IS_IN (rtld)]: Include <dl-mman.h>.
* sysdeps/generic/dl-mman.h: New file.
* sysdeps/mach/hurd/dl-mman.h: Likewise.
2016-01-05 Joseph Myers <joseph@codesourcery.com> 2016-01-05 Joseph Myers <joseph@codesourcery.com>
* manual/texinfo.tex: Update to version 2016-01-04.21 with * manual/texinfo.tex: Update to version 2016-01-04.21 with

4
include/sys/mman.h
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@ -16,6 +16,10 @@ libc_hidden_proto (__madvise)
/* This one is Linux specific. */ /* This one is Linux specific. */
extern void *__mremap (void *__addr, size_t __old_len, extern void *__mremap (void *__addr, size_t __old_len,
size_t __new_len, int __flags, ...); size_t __new_len, int __flags, ...);
# if IS_IN (rtld)
# include <dl-mman.h>
# endif
#endif #endif
#endif #endif

22
sysdeps/generic/dl-mman.h Normal file
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@ -0,0 +1,22 @@
/* Functions with hidden attribute internal to ld.so, which are declared
in include/sys/mman.h. Generic version.
Copyright (C) 2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
extern __typeof (__mmap) __mmap attribute_hidden;
extern __typeof (__mprotect) __mprotect attribute_hidden;
extern __typeof (__munmap) __munmap attribute_hidden;

23
sysdeps/mach/hurd/dl-mman.h Normal file
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@ -0,0 +1,23 @@
/* Functions with hidden attribute internal to ld.so, which are declared
in include/sys/mman.h. Hurd version.
Copyright (C) 2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
/* Can't hide __mmap on Hurd, since __mmap in ld.so will be preempted by
the one in libc.so after bootstrap. */
extern __typeof (__mprotect) __mprotect attribute_hidden;
extern __typeof (__munmap) __munmap attribute_hidden;