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Hide internal __mremap function [BZ #18822]

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Hide internal __mremap function to allow direct access within libc.so and
libc.a without using GOT nor PLT.

__GI___mremap is defined when sysdeps/unix/syscalls.list is used to
generate mremap.  Otherwise libc_hidden_def is needed explicitly.

	[BZ #18822]
	* include/sys/mman.h (__mremap): Add libc_hidden_proto.
	* sysdeps/unix/sysv/linux/m68k/mremap.S (__mremap): Add
	libc_hidden_def.
This commit is contained in:
H.J. Lu
2017-10-01 16:01:43 -07:00
parent 372fe247b1
commit 225f7eec85
3 changed files with 9 additions and 0 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2017-10-01 H.J. Lu <hongjiu.lu@intel.com>
[BZ #18822]
* include/sys/mman.h (__mremap): Add libc_hidden_proto.
* sysdeps/unix/sysv/linux/m68k/mremap.S (__mremap): Add
libc_hidden_def.
2017-10-01 H.J. Lu <hongjiu.lu@intel.com> 2017-10-01 H.J. Lu <hongjiu.lu@intel.com>
[BZ #18822] [BZ #18822]

1
include/sys/mman.h
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@ -20,6 +20,7 @@ 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, ...);
libc_hidden_proto (__mremap)
# if IS_IN (rtld) # if IS_IN (rtld)
# include <dl-mman.h> # include <dl-mman.h>

1
sysdeps/unix/sysv/linux/m68k/mremap.S
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@ -25,4 +25,5 @@ PSEUDO (__mremap, mremap, 5)
move.l %d0, %a0 move.l %d0, %a0
rts rts
PSEUDO_END (__mremap) PSEUDO_END (__mremap)
libc_hidden_def (__mremap)
weak_alias (__mremap, mremap) weak_alias (__mremap, mremap)