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Don't use INTVARDEF/INTUSE with __libc_enable_secure (bug 14132).

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Continuing the removal of the obsolete INTDEF / INTVARDEF / INTUSE
mechanism, this patch replaces its use for __libc_enable_secure with
the use of rtld_hidden_data_def and rtld_hidden_proto.

Tested for x86_64 that installed stripped shared libraries are
unchanged by the patch.

	[BZ #14132]
	* elf/dl-sysdep.c (__libc_enable_secure): Use rtld_hidden_data_def
	instead of INTVARDEF.
	(_dl_sysdep_start): Do not use INTUSE with __libc_enable_secure.
	* sysdeps/mach/hurd/dl-sysdep.c (__libc_enable_secure): Use
	rtld_hidden_data_def instead of INTVARDEF.
	(_dl_sysdep_start): Do not use INTUSE with __libc_enable_secure.
	* elf/dl-deps.c (expand_dst): Likewise.
	* elf/dl-load.c (_dl_dst_count): Likewise.
	(_dl_dst_substitute): Likewise.
	(decompose_rpath): Likewise.
	(_dl_init_paths): Likewise.
	(open_path): Likewise.
	(_dl_map_object): Likewise.
	* elf/rtld.c (dl_main): Likewise.
	(process_dl_audit): Likewise.
	(process_envvars): Likewise.
	* include/unistd.h [IS_IN_rtld] (__libc_enable_secure_internal):
	Remove declaration.
	(__libc_enable_secure): Use rtld_hidden_proto.
This commit is contained in:
Joseph Myers
2014-10-10 11:13:11 +00:00
parent b8c80a7e0d
commit 6bc6bd3b10
7 changed files with 48 additions and 28 deletions
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8
elf/dl-sysdep.c
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@ -54,7 +54,7 @@ extern void __libc_check_standard_fds (void);
ElfW(Addr) _dl_base_addr;
#endif
int __libc_enable_secure attribute_relro = 0;
INTVARDEF(__libc_enable_secure)
rtld_hidden_data_def (__libc_enable_secure)
int __libc_multiple_libcs = 0; /* Defining this here avoids the inclusion
of init-first. */
/* This variable contains the lowest stack address ever used. */
@ -148,7 +148,7 @@ _dl_sysdep_start (void **start_argptr,
#ifndef HAVE_AUX_SECURE
seen = -1;
#endif
INTUSE(__libc_enable_secure) = av->a_un.a_val;
__libc_enable_secure = av->a_un.a_val;
break;
case AT_PLATFORM:
GLRO(dl_platform) = (void *) av->a_un.a_val;
@ -199,7 +199,7 @@ _dl_sysdep_start (void **start_argptr,
/* If one of the two pairs of IDs does not match this is a setuid
or setgid run. */
INTUSE(__libc_enable_secure) = uid | gid;
__libc_enable_secure = uid | gid;
}
#endif
@ -243,7 +243,7 @@ _dl_sysdep_start (void **start_argptr,
/* If this is a SUID program we make sure that FDs 0, 1, and 2 are
allocated. If necessary we are doing it ourself. If it is not
possible we stop the program. */
if (__builtin_expect (INTUSE(__libc_enable_secure), 0))
if (__builtin_expect (__libc_enable_secure, 0))
__libc_check_standard_fds ();
(*dl_main) (phdr, phnum, &user_entry, GLRO(dl_auxv));