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Enable VDSO on x86_64 statically linked programs [BZ #19767]

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All the required code already existed, and some of it was already
running.

AT_SYSINFO_EHDR is processed if NEED_DL_SYSINFO_DSO is defined, but it
looks like it always is. The call to setup_vdso is also unconditional,
so all that was left to do was setup the function pointers and use
them. This patch just deletes some #ifdef to enable that.

	[BZ #19767]
	* nptl/Makefile (tests-static): Add tst-cond11-static.
	(tests): Likewise.
	* nptl/tst-cond11-static.c: New File.
	* sysdeps/unix/sysv/linux/Makefile (tests-static): Add
	tst-affinity-static.
	(tests): Likewise.
	* sysdeps/unix/sysv/linux/sysdep-vdso.h: Check USE_VSYSCALL
	instead of SHARED.
	* sysdeps/unix/sysv/linux/sysdep.h (ALWAYS_USE_VSYSCALL): New.
	(USE_VSYSCALL): Likewise.
	* sysdeps/unix/sysv/linux/tst-affinity-static.c: New file.
	* sysdeps/unix/sysv/linux/x86/libc-vdso.h: Check USE_VSYSCALL
	instead of SHARED.
	* sysdeps/unix/sysv/linux/x86_64/init-first.c: Don't check
	SHARED.
	* sysdeps/unix/sysv/linux/x86_64/sysdep.h (ALWAYS_USE_VSYSCALL):
	New.
This commit is contained in:
Rafael Ávila de Espíndola 2018-11-23 15:34:15 -08:00 committed by H.J. Lu
parent 1283c478aa
commit 1e8bdc3a2b
10 changed files with 47 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
ChangeLog
View File

@ -1,3 +1,24 @@
2018-11-23 Rafael Ávila de Espíndola <rafael@espindo.la>
[BZ #19767]
* nptl/Makefile (tests-static): Add tst-cond11-static.
(tests): Likewise.
* nptl/tst-cond11-static.c: New File.
* sysdeps/unix/sysv/linux/Makefile (tests-static): Add
tst-affinity-static.
(tests): Likewise.
* sysdeps/unix/sysv/linux/sysdep-vdso.h: Check USE_VSYSCALL
instead of SHARED.
* sysdeps/unix/sysv/linux/sysdep.h (ALWAYS_USE_VSYSCALL): New.
(USE_VSYSCALL): Likewise.
* sysdeps/unix/sysv/linux/tst-affinity-static.c: New file.
* sysdeps/unix/sysv/linux/x86/libc-vdso.h: Check USE_VSYSCALL
instead of SHARED.
* sysdeps/unix/sysv/linux/x86_64/init-first.c: Don't check
SHARED.
* sysdeps/unix/sysv/linux/x86_64/sysdep.h (ALWAYS_USE_VSYSCALL):
New.
2018-11-23 Joseph Myers <joseph@codesourcery.com>
[BZ #23915]

5
nptl/Makefile
View File

@ -449,9 +449,10 @@ link-libc-static := $(common-objpfx)libc.a $(static-gnulib) \
tests-static += tst-locale1 tst-locale2 tst-stackguard1-static \
tst-cancel21-static tst-cancel24-static tst-cond8-static \
tst-mutex8-static tst-mutexpi8-static tst-sem11-static \
tst-sem12-static
tst-sem12-static tst-cond11-static
tests += tst-cancel21-static tst-cancel24-static \
tst-cond8-static
tst-cond8-static tst-cond11-static
tests-internal += tst-sem11-static tst-sem12-static tst-stackguard1-static
xtests-static += tst-setuid1-static

1
nptl/tst-cond11-static.c Normal file
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@ -0,0 +1 @@
#include "tst-cond11.c"

3
sysdeps/unix/sysv/linux/Makefile
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@ -146,6 +146,9 @@ sysdep_routines += sched_getcpu oldglob
tests += tst-affinity tst-affinity-pid
tests-static := tst-affinity-static
tests += $(tests-static)
CFLAGS-fork.c = $(libio-mtsafe)
CFLAGS-getpid.o = -fomit-frame-pointer
CFLAGS-getpid.os = -fomit-frame-pointer

4
sysdeps/unix/sysv/linux/sysdep-vdso.h
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@ -26,7 +26,7 @@
funcptr (args)
#endif
#if defined SHARED && defined HAVE_VSYSCALL
#if USE_VSYSCALL && defined HAVE_VSYSCALL
# include <libc-vdso.h>
@ -84,6 +84,6 @@
# define INTERNAL_VSYSCALL(name, err, nr, args...) \
INTERNAL_SYSCALL (name, err, nr, ##args)
#endif /* defined SHARED && defined HAVE_VSYSCALL */
#endif /* USE_VSYSCALL && defined HAVE_VSYSCALL */
#endif /* SYSDEP_VDSO_LINUX_H */

7
sysdeps/unix/sysv/linux/sysdep.h
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@ -18,6 +18,13 @@
#include <bits/wordsize.h>
#include <kernel-features.h>
/* By default only shared builds use vdso. */
#ifndef ALWAYS_USE_VSYSCALL
#define ALWAYS_USE_VSYSCALL 0
#endif
#define USE_VSYSCALL (defined (SHARED) || ALWAYS_USE_VSYSCALL)
/* Set error number and return -1. A target may choose to return the
internal function, __syscall_error, which sets errno and returns -1.
We use -1l, instead of -1, so that it can be casted to (void *). */

1
sysdeps/unix/sysv/linux/tst-affinity-static.c Normal file
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@ -0,0 +1 @@
#include "tst-affinity.c"

2
sysdeps/unix/sysv/linux/x86/libc-vdso.h
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@ -22,7 +22,7 @@
#include <time.h>
#include <sys/time.h>
#ifdef SHARED
#if USE_VSYSCALL
# include <sysdep-vdso.h>

12
sysdeps/unix/sysv/linux/x86_64/init-first.c
View File

@ -16,11 +16,10 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifdef SHARED
# include <time.h>
# include <sysdep.h>
# include <dl-vdso.h>
# include <libc-vdso.h>
#include <time.h>
#include <sysdep.h>
#include <dl-vdso.h>
#include <libc-vdso.h>
long int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *)
attribute_hidden;
@ -46,7 +45,6 @@ __vdso_platform_setup (void)
VDSO_SYMBOL(getcpu) = p;
}
# define VDSO_SETUP __vdso_platform_setup
#endif
#define VDSO_SETUP __vdso_platform_setup
#include <csu/init-first.c>

3
sysdeps/unix/sysv/linux/x86_64/sysdep.h
View File

@ -18,6 +18,9 @@
#ifndef _LINUX_X86_64_SYSDEP_H
#define _LINUX_X86_64_SYSDEP_H 1
/* Always enable vsyscalls on x86_64 */
#define ALWAYS_USE_VSYSCALL 1
/* There is some commonality. */
#include <sysdeps/unix/sysv/linux/sysdep.h>
#include <sysdeps/unix/x86_64/sysdep.h>