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linux: Enable vDSO for static linking as default (BZ#19767)

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This patch assumes static vDSO is supported as default, it is now supported
on all current architectures that support vDSO.  It allows removing both
ALWAYS_USE_VSYSCALL define, which an architecture requires to explicit define
and USE_VSYSCALL (which defines vDSO only for shared or if architecture defines
ALWAYS_USE_VSYSCALL).

Checked with a build against all affected ABIs.

	[BZ #19767]
	* sysdeps/unix/sysv/linux/aarch64/sysdep.h (ALWAYS_USE_VSYSCALL):
	Remove definition.
	* sysdeps/unix/sysv/linux/arm/sysdep.h (ALWAYS_USE_VSYSCALL):
	Likewise.
	* sysdeps/unix/sysv/linux/i386/sysdep.h (ALWAYS_USE_VSYSCALL):
	Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/sysdep.h (ALWAYS_USE_VSYSCALL):
	Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n32/sysdep.h
	(ALWAYS_USE_VSYSCALL): Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h
	(ALWAYS_USE_VSYSCALL): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h
	(ALWAYS_USE_VSYSCALL): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h
	(ALWAYS_USE_VSYSCALL): Likewise.
	* sysdeps/unix/sysv/linux/riscv/sysdep.h (ALWAYS_USE_VSYSCALL):
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h
	(ALWAYS_USE_VSYSCALL): Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h
	(ALWAYS_USE_VSYSCALL): Likewise.
	* sysdeps/unix/sysv/linux/sparc/sysdep.h (ALWAYS_USE_VSYSCALL):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/sysdep.h (ALWAYS_USE_VSYSCALL):
	Likewise.
	* sysdeps/unix/sysv/linux/x86/libc-vdso.h: Remove #if USE_VSYSCALL.
	* sysdeps/unix/sysv/linux/sysdep-vdso.h: Likewise.
	* sysdeps/unix/sysv/linux/sysdep.h (ALWAYS_USE_VSYSCALL,
	USE_VSYSCALL): Remove defitions.
This commit is contained in:
Adhemerval Zanella 2019-06-13 20:00:29 +00:00
parent c9c1a413c0
commit d665367f59
17 changed files with 34 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
ChangeLog
View File

@ -1,5 +1,37 @@
2019-08-05 Adhemerval Zanella <adhemerval.zanella@linaro.org>
[BZ #19767]
* sysdeps/unix/sysv/linux/aarch64/sysdep.h (ALWAYS_USE_VSYSCALL):
Remove definition.
* sysdeps/unix/sysv/linux/arm/sysdep.h (ALWAYS_USE_VSYSCALL):
Likewise.
* sysdeps/unix/sysv/linux/i386/sysdep.h (ALWAYS_USE_VSYSCALL):
Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/sysdep.h (ALWAYS_USE_VSYSCALL):
Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n32/sysdep.h
(ALWAYS_USE_VSYSCALL): Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h
(ALWAYS_USE_VSYSCALL): Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h
(ALWAYS_USE_VSYSCALL): Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h
(ALWAYS_USE_VSYSCALL): Likewise.
* sysdeps/unix/sysv/linux/riscv/sysdep.h (ALWAYS_USE_VSYSCALL):
Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h
(ALWAYS_USE_VSYSCALL): Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h
(ALWAYS_USE_VSYSCALL): Likewise.
* sysdeps/unix/sysv/linux/sparc/sysdep.h (ALWAYS_USE_VSYSCALL):
Likewise.
* sysdeps/unix/sysv/linux/x86_64/sysdep.h (ALWAYS_USE_VSYSCALL):
Likewise.
* sysdeps/unix/sysv/linux/x86/libc-vdso.h: Remove #if USE_VSYSCALL.
* sysdeps/unix/sysv/linux/sysdep-vdso.h: Likewise.
* sysdeps/unix/sysv/linux/sysdep.h (ALWAYS_USE_VSYSCALL,
USE_VSYSCALL): Remove defitions.
[BZ #19767]
* sysdeps/unix/sysv/linux/sparc/init-first.c: Remove #ifdef SHARED.
* sysdeps/unix/sysv/linux/sparc/libc-vdso.h: Likewise.

3
sysdeps/unix/sysv/linux/aarch64/sysdep.h
View File

@ -19,9 +19,6 @@
#ifndef _LINUX_AARCH64_SYSDEP_H
#define _LINUX_AARCH64_SYSDEP_H 1
/* Always enable vsyscalls on aarch64 */
#define ALWAYS_USE_VSYSCALL 1
#include <sysdeps/unix/sysdep.h>
#include <sysdeps/aarch64/sysdep.h>
#include <sysdeps/unix/sysv/linux/generic/sysdep.h>

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

@ -20,9 +20,6 @@
#ifndef _LINUX_ARM_SYSDEP_H
#define _LINUX_ARM_SYSDEP_H 1
/* Always enable vsyscalls on arm */
#define ALWAYS_USE_VSYSCALL 1
/* There is some commonality. */
#include <sysdeps/unix/sysv/linux/sysdep.h>
#include <sysdeps/unix/arm/sysdep.h>

3
sysdeps/unix/sysv/linux/i386/sysdep.h
View File

@ -19,9 +19,6 @@
#ifndef _LINUX_I386_SYSDEP_H
#define _LINUX_I386_SYSDEP_H 1
/* Always enable vsyscalls on i386 */
#define ALWAYS_USE_VSYSCALL 1
/* There is some commonality. */
#include <sysdeps/unix/sysv/linux/sysdep.h>
#include <sysdeps/unix/i386/sysdep.h>

3
sysdeps/unix/sysv/linux/mips/mips32/sysdep.h
View File

@ -18,9 +18,6 @@
#ifndef _LINUX_MIPS_MIPS32_SYSDEP_H
#define _LINUX_MIPS_MIPS32_SYSDEP_H 1
/* Always enable vsyscalls on mips32. */
#define ALWAYS_USE_VSYSCALL 1
/* There is some commonality. */
#include <sysdeps/unix/sysv/linux/sysdep.h>
#include <sysdeps/unix/mips/mips32/sysdep.h>

3
sysdeps/unix/sysv/linux/mips/mips64/n32/sysdep.h
View File

@ -18,9 +18,6 @@
#ifndef _LINUX_MIPS_SYSDEP_H
#define _LINUX_MIPS_SYSDEP_H 1
/* Always enable vsyscalls on n32. */
#define ALWAYS_USE_VSYSCALL 1
/* There is some commonality. */
#include <sysdeps/unix/sysv/linux/sysdep.h>
#include <sysdeps/unix/mips/mips64/n32/sysdep.h>

3
sysdeps/unix/sysv/linux/mips/mips64/n64/sysdep.h
View File

@ -18,9 +18,6 @@
#ifndef _LINUX_MIPS_SYSDEP_H
#define _LINUX_MIPS_SYSDEP_H 1
/* Always enable vsyscalls on n64. */
#define ALWAYS_USE_VSYSCALL 1
/* There is some commonality. */
#include <sysdeps/unix/sysv/linux/sysdep.h>
#include <sysdeps/unix/mips/mips64/n64/sysdep.h>

3
sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h
View File

@ -18,9 +18,6 @@
#ifndef _LINUX_POWERPC_SYSDEP_H
#define _LINUX_POWERPC_SYSDEP_H 1
/* Always enable vsyscalls on powerpc32 */
#define ALWAYS_USE_VSYSCALL 1
#include <sysdeps/unix/sysv/linux/sysdep.h>
#include <sysdeps/unix/powerpc/sysdep.h>
#include <tls.h>

3
sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h
View File

@ -20,9 +20,6 @@
#ifndef _LINUX_POWERPC_SYSDEP_H
#define _LINUX_POWERPC_SYSDEP_H 1
/* Always enable vsyscalls on powerpc64 */
#define ALWAYS_USE_VSYSCALL 1
#include <sysdeps/unix/sysv/linux/sysdep.h>
#include <sysdeps/unix/powerpc/sysdep.h>
#include <tls.h>

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

@ -19,9 +19,6 @@
#ifndef _LINUX_RISCV_SYSDEP_H
#define _LINUX_RISCV_SYSDEP_H 1
/* Always enable vsyscalls on riscv */
#define ALWAYS_USE_VSYSCALL 1
#include <sysdeps/unix/sysv/linux/generic/sysdep.h>
#include <tls.h>

3
sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h
View File

@ -19,9 +19,6 @@
#ifndef _LINUX_S390_SYSDEP_H
#define _LINUX_S390_SYSDEP_H
/* Always enable vsyscalls on s390-32. */
#define ALWAYS_USE_VSYSCALL 1
#include <sysdeps/s390/s390-32/sysdep.h>
#include <sysdeps/unix/sysdep.h>
#include <sysdeps/unix/sysv/linux/sysdep.h>

3
sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h
View File

@ -20,9 +20,6 @@
#ifndef _LINUX_S390_SYSDEP_H
#define _LINUX_S390_SYSDEP_H
/* Always enable vsyscalls on s390-64. */
#define ALWAYS_USE_VSYSCALL 1
#include <sysdeps/s390/s390-64/sysdep.h>
#include <sysdeps/unix/sysdep.h>
#include <sysdeps/unix/sysv/linux/sysdep.h>

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

@ -19,9 +19,6 @@
#ifndef _LINUX_SPARC_SYSDEP_H
#define _LINUX_SPARC_SYSDEP_H 1
/* Always enable vsyscalls on sparc */
#define ALWAYS_USE_VSYSCALL 1
#include <sysdeps/unix/sysdep.h>
#include <sysdeps/unix/sysv/linux/sysdep.h>
#include <sysdeps/sparc/sysdep.h>

2
sysdeps/unix/sysv/linux/sysdep-vdso.h
View File

@ -26,7 +26,7 @@
funcptr (args)
#endif
#if USE_VSYSCALL && defined HAVE_VSYSCALL
#ifdef HAVE_VSYSCALL
# include <libc-vdso.h>

7
sysdeps/unix/sysv/linux/sysdep.h
View File

@ -18,13 +18,6 @@
#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 *). */

6
sysdeps/unix/sysv/linux/x86/libc-vdso.h
View File

@ -22,9 +22,7 @@
#include <time.h>
#include <sys/time.h>
#if USE_VSYSCALL
# include <sysdep-vdso.h>
#include <sysdep-vdso.h>
extern long int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *)
attribute_hidden;
@ -32,6 +30,4 @@ extern long int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *)
extern long int (*VDSO_SYMBOL(getcpu)) (unsigned *, unsigned *, void *)
attribute_hidden;
#endif
#endif /* _LIBC_VDSO_H */

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

@ -18,9 +18,6 @@
#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>