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* elf/elf.h: Define AT_EXECFN.

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* elf/rtld.c [!__ASSUME_AT_EXECFN] (process_envvars): Don't handle
	LD_ORIGIN_PATH.
	* elf/dl-sysdep.c (_dl_sysdep_start): Handle AT_EXECFN.
	* elf/dl-support.c: Define _dl_execfn.  Don't define _dl_origin_path
	if __ASSUME_AT_EXECFN is defined.
	(_dl_aux_init): Handle AT_EXECFN.
	* sysdeps/unix/sysv/linux/kernel-features.h: Define __ASSUME_AT_EXECFN
	for 2.6.27 and up.
	* sysdeps/generic/ldsodefs.h (rtld_global_ro): Add _dl_execfn.
	Don't define _dl_origin_path if __ASSUME_AT_EXECFN is defined.
	* sysdeps/unix/sysv/linux/dl-origin.c (_dl_get_origin): Use
	_dl_execfn if available and avoid compatibility code if
	__ASSUME_AT_EXECFN is defined.
This commit is contained in:
Ulrich Drepper
2008-07-24 18:33:44 +00:00
parent 579cdf5a47
commit 0e077a7eea
8 changed files with 77 additions and 20 deletions
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9
elf/dl-support.c
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@ -1,5 +1,5 @@
/* Support for dynamic linking code in static libc.
Copyright (C) 1996-2005, 2006, 2007 Free Software Foundation, Inc.
Copyright (C) 1996-2005, 2006, 2007, 2008 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
@ -62,8 +62,12 @@ struct link_map *_dl_profile_map;
/* This is the address of the last stack address ever used. */
void *__libc_stack_end;
#ifndef __ASSUME_AT_EXECFN
/* Path where the binary is found. */
const char *_dl_origin_path;
#endif
/* File Name of the executable. */
const char *_dl_execfn;
/* Nonzero if runtime lookup should not update the .got/.plt. */
int _dl_bind_not;
@ -216,6 +220,9 @@ _dl_aux_init (ElfW(auxv_t) *av)
__libc_enable_secure = av->a_un.a_val;
__libc_enable_secure_decided = 1;
break;
case AT_EXECFN:
GLRO(dl_execfn) = (void *) av->a_un.a_val;
break;
# ifdef DL_PLATFORM_AUXV
DL_PLATFORM_AUXV
# endif