diff mbox series

[29/58] Hide internal __mremap function [BZ #18822]

Message ID	20170901180029.9527-30-hjl.tools@gmail.com
State	New
Headers	show Return-Path: <libc-alpha-return-84082-incoming=patchwork.ozlabs.org@sourceware.org> DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:from:to:subject:date:message-id:in-reply-to :references; q=dns; s=default; b=jO83jlVzWYIbLVxVXljysLpiUrutCPf zAd6D0soX+7MB51M8gxXY9KtGql9IMacKO4tfOHCFxYkTTNFlkGeePFBj6gtrepl K6cLfDCMym1lOg+JgZVDi4knnT66hYltc/n1b/EY6xXw5YRFmEwW+Aj1GsCrg/r/ DpmxAIUxuPso= Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk Sender: libc-alpha-owner@sourceware.org From: "H.J. Lu" <hjl.tools@gmail.com> To: libc-alpha@sourceware.org Subject: [PATCH 29/58] Hide internal __mremap function [BZ #18822] Date: Fri, 1 Sep 2017 11:00:00 -0700 Message-Id: <20170901180029.9527-30-hjl.tools@gmail.com> In-Reply-To: <20170901180029.9527-1-hjl.tools@gmail.com> References: <20170901180029.9527-1-hjl.tools@gmail.com>
Series	Hide internal functions in libc.so \| expand [00/58] Hide internal functions in libc.so [01/58] Mark internal functions with attribute_hidden [BZ #18822] [02/58] Mark 3 _internal functions with attribute_hidden [BZ #18822] [03/58] Mark __internal_statvfs[64] with attribute_hidden [BZ #18822] [04/58] Mark ____wcsto_l_internal functions with attribute_hidden [BZ #18822] [05/58] Mark internal argp functions with attribute_hidden [BZ #18822] [06/58] Mark internal unistd functions with attribute_hidden [BZ #18822] [07/58] Mark internal grp/pwd/shadow functions with attribute_hidden [BZ #18822] [08/58] Mark __dso_handle as hidden [BZ #18822] [09/58] Mark internal wchar functions with attribute_hidden [BZ #18822] [10/58] Mark internal gmp functions with attribute_hidden [BZ #18822] [11/58] Mark internal nscd functions with attribute_hidden [BZ #18822] [12/58] Mark internal time functions with attribute_hidden [BZ #18822] [13/58] Mark internal statfs functions with attribute_hidden [BZ #18822] [14/58] Mark internal gshadow functions with attribute_hidden [BZ #18822] [15/58] Mark internal stdio functions with attribute_hidden [BZ #18822] [16/58] Mark internal getXXXbyYYY functions with attribute_hidden [BZ #18822] [17/58] Mark internal dirent functions with attribute_hidden [BZ #18822] [18/58] Mark internal utmp functions with attribute_hidden [BZ #18822] [19/58] Mark internal stdlib functions with attribute_hidden [BZ #18822] [20/58] Hide internal regex functions [BZ #18822] [21/58] Hide __readv and __writev [BZ #18822] [22/58] Mark internal rpc functions with attribute_hidden [BZ #18822] [23/58] Mark internal netlink functions with attribute_hidden [BZ #18822] [24/58] Hide __chmod and __mkdir [BZ #18822] [25/58] Hide internal sysinfo functions [BZ #18822] [26/58] Mark internal intl functions with attribute_hidden [BZ #18822] [27/58] Hide internal __ioctl function [BZ #18822] [28/58] Hide internal __malloc_check_init function [BZ #18822] [29/58] Hide internal __mremap function [BZ #18822] [30/58] Hide __posix_spawn_file_actions_realloc/__spawni [BZ #18822] [31/58] Hide internal __strsep function [BZ #18822] [32/58] Hide internal signal functions [BZ #18822] [33/58] Hide internal __sysinfo function [BZ #18822] [34/58] Hide internal __assert_fail_base function [BZ #18822] [35/58] Hide internal __tdestroy function [BZ #18822] [36/58] Hide internal __fopen_maybe_mmap function [BZ #18822] [37/58] Hide internal __bsd_getpt function [BZ #18822] [38/58] Move hidden_proto (__dl_iterate_phdr) to include/link.h [BZ #18822] [39/58] Hide internal __get_sol function [BZ #18822] [40/58] Hide internal __gettextparse function [BZ #18822] [41/58] Hide internal idna functions [BZ #18822] [42/58] Hide internal __ifreq function [BZ #18822] [43/58] Hide internal __hasmntopt function [BZ #18822] [44/58] Hide internal __hash_string function [BZ #18822] [45/58] Hide internal __sched_setparam function [BZ #18822] [46/58] Hide internal __vstrfmon_l function [BZ #18822] [47/58] Hide internal __setrlimit function [BZ #18822] [48/58] Hide internal __tcgetattr function [BZ #18822] [49/58] Hide internal __nis_hash function [BZ #18822] [50/58] Hide internal __setfpucw function [BZ #18822] [51/58] Hide internal __init_misc function [BZ #18822] [52/58] Hide internal __libc_print_version function [BZ #18822] [53/58] Hide internal __moncontrol function [BZ #18822] [54/58] Hide internal __new_exitfn function [BZ #18822] [55/58] Hide internal __new_getrlimit function [BZ #18822] [56/58] Hide internal __glob64 function [BZ #18822] [57/58] Hide internal __sched_setaffinity_new function [BZ #18822] [58/58] Hide internal fadvise64/fallocate64 functions [BZ #18822]

Commit Message

H.J. Lu Sept. 1, 2017, 6 p.m. UTC

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.
---
 include/sys/mman.h                    | 1 +
 sysdeps/unix/sysv/linux/m68k/mremap.S | 1 +
 2 files changed, 2 insertions(+)

Comments

H.J. Lu Oct. 1, 2017, 10:33 p.m. UTC | #1

On 9/1/17, H.J. Lu <hjl.tools@gmail.com> wrote:
> 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.

Tested with build-many-glibcs.py.  I am checking it in.

diff mbox series

Patch

diff --git a/include/sys/mman.h b/include/sys/mman.h
index 8b996fce73..503edaae88 100644
--- a/include/sys/mman.h
+++ b/include/sys/mman.h
@@ -20,6 +20,7 @@  libc_hidden_proto (__madvise)
 /* This one is Linux specific.  */
 extern void *__mremap (void *__addr, size_t __old_len,
 		       size_t __new_len, int __flags, ...);
+libc_hidden_proto (__mremap)
 
 # if IS_IN (rtld)
 #  include <dl-mman.h>
diff --git a/sysdeps/unix/sysv/linux/m68k/mremap.S b/sysdeps/unix/sysv/linux/m68k/mremap.S
index 01be848f45..5cb7c1b132 100644
--- a/sysdeps/unix/sysv/linux/m68k/mremap.S
+++ b/sysdeps/unix/sysv/linux/m68k/mremap.S
@@ -25,4 +25,5 @@  PSEUDO (__mremap, mremap, 5)
 	move.l %d0, %a0
 	rts
 PSEUDO_END (__mremap)
+libc_hidden_def (__mremap)
 weak_alias (__mremap, mremap)