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* sysdeps/generic/dl-osinfo.h (_dl_setup_stack_chk_guard): Take

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one parameter.  If non-NULL use it to initialize return value.
	(_dl_setup_pointer_guard): New function.
	* sysdeps/unix/sysv/linux/dl-osinfo.h: Likewise.
	* sysdeps/generic/ldsodefs.h: Declare _dl_random.
	* elf/rtld.c (security_init): Pass _dl_random to
	_dl_setup_stack_chk_guard.  Call _dl_setup_pointer_guard to initialize
	pointer_chk_guard.
	* elf/dl-sysdep.c (_dl_random): New variable.
	(_dl_sysdep_start): Handle AT_RANDOM.
	(_dl_show_auxv): Likewise.
	* elf/dl-support.c (_dl_random): New variable.
	(_dl_aux_init): Handle AT_RANDOM.
	* csu/libc-start.c [!SHARED] (libc_start_main): Pass _dl_random
	to _dl_setup_stack_chk_guard.

	* elf/elf.h (AT_RANDOM): Define AT_BASE_PLATFORM and AT_RANDOM.
This commit is contained in:
Ulrich Drepper
2009-01-11 04:44:06 +00:00
parent 5b656a0d30
commit 965cb60a21
7 changed files with 112 additions and 31 deletions
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8
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, 2008 Free Software Foundation, Inc.
Copyright (C) 1996-2008, 2009 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
@ -84,6 +84,9 @@ struct r_scope_elem _dl_initial_searchlist;
int _dl_starting_up = 1;
#endif
/* Random data provided by the kernel. */
void *_dl_random;
/* Get architecture specific initializer. */
#include <dl-procinfo.c>
@ -216,6 +219,9 @@ _dl_aux_init (ElfW(auxv_t) *av)
__libc_enable_secure = av->a_un.a_val;
__libc_enable_secure_decided = 1;
break;
case AT_RANDOM:
_dl_random = (void *) av->a_un.a_val;
break;
# ifdef DL_PLATFORM_AUXV
DL_PLATFORM_AUXV
# endif