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Remove ARM __ASSUME_SIGFRAME_V2.

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This patch removes ARM __ASSUME_SIGFRAME_V2 now that the
2.6.18-and-later signal frame layout can be assumed, renaming the
affected functions accordingly now only one version of them is needed
in glibc.  (sigrestorer.S did not in fact include <kernel-features.h>
and it appears that, unlike other such cases, it didn't get the header
indirectly, so the v1 functions would have been compiled in even when
sigaction.c didn't reference them.)

(alpha and hppa also have architecture-specific __ASSUME_* macros that
should now be removed: __ASSUME_FDATASYNC and __ASSUME_LWS_CAS
respectively.  I don't have any plans to do anything on that myself.)

Tested on ARM.

	* sysdeps/unix/sysv/linux/arm/kernel-features.h
	(__ASSUME_SIGFRAME_V2): Remove macro.
	* sysdeps/unix/sysv/linux/arm/sigrestorer.S: Update comment.
	[!__ASSUME_SIGFRAME_V2]: Remove conditional code.
	(__default_sa_restorer_v2): Rename to __default_sa_restorer.
	(__default_rt_sa_restorer_v2): Rename to __default_rt_sa_restorer.
	* sysdeps/unix/sysv/linux/arm/sigaction.c (__default_sa_restorer):
	Declare as function.  Remove conditional macro definitions.
	(__default_rt_sa_restorer): Likewise.
	(__default_sa_restorer_v1): Remove declaration.
	(__default_sa_restorer_v2): Likewise.
	(__default_rt_sa_restorer_v1): Likewise.
	(__default_rt_sa_restorer_v2): Likewise.
	* sysdeps/unix/sysv/linux/arm/Versions (GLIBC_PRIVATE): Remove
	__default_sa_restorer_v1, __default_rt_sa_restorer_v1,
	__default_sa_restorer_v2 and __default_rt_sa_restorer_v2.
This commit is contained in:
Joseph Myers 2014-06-21 00:58:56 +00:00
parent c4eff5625d
commit 2272ffc116
5 changed files with 26 additions and 59 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
ChangeLog
View File

@ -1,3 +1,22 @@
2014-06-21 Joseph Myers <joseph@codesourcery.com>
* sysdeps/unix/sysv/linux/arm/kernel-features.h
(__ASSUME_SIGFRAME_V2): Remove macro.
* sysdeps/unix/sysv/linux/arm/sigrestorer.S: Update comment.
[!__ASSUME_SIGFRAME_V2]: Remove conditional code.
(__default_sa_restorer_v2): Rename to __default_sa_restorer.
(__default_rt_sa_restorer_v2): Rename to __default_rt_sa_restorer.
* sysdeps/unix/sysv/linux/arm/sigaction.c (__default_sa_restorer):
Declare as function. Remove conditional macro definitions.
(__default_rt_sa_restorer): Likewise.
(__default_sa_restorer_v1): Remove declaration.
(__default_sa_restorer_v2): Likewise.
(__default_rt_sa_restorer_v1): Likewise.
(__default_rt_sa_restorer_v2): Likewise.
* sysdeps/unix/sysv/linux/arm/Versions (GLIBC_PRIVATE): Remove
__default_sa_restorer_v1, __default_rt_sa_restorer_v1,
__default_sa_restorer_v2 and __default_rt_sa_restorer_v2.
2014-06-20 Roland McGrath <roland@hack.frob.com>
* sysdeps/unix/sysv/linux/sparc/Makefile [$(subdir) = nptl]

2
sysdeps/unix/sysv/linux/arm/Versions
View File

@ -10,7 +10,5 @@ libc {
GLIBC_PRIVATE {
# A copy of sigaction lives in libpthread, and needs these.
__default_sa_restorer; __default_rt_sa_restorer;
__default_sa_restorer_v1; __default_rt_sa_restorer_v1;
__default_sa_restorer_v2; __default_rt_sa_restorer_v2;
}
}

3
sysdeps/unix/sysv/linux/arm/kernel-features.h
View File

@ -17,9 +17,6 @@
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
/* The signal frame layout changed in 2.6.18. */
#define __ASSUME_SIGFRAME_V2 1
/* Support for the recvmmsg syscall was added in 2.6.33. */
#if __LINUX_KERNEL_VERSION >= 0x020621
# define __ASSUME_RECVMMSG_SYSCALL 1

18
sysdeps/unix/sysv/linux/arm/sigaction.c
View File

@ -30,22 +30,8 @@
#define SA_RESTORER 0x04000000
extern void __default_sa_restorer_v1(void);
extern void __default_sa_restorer_v2(void);
extern void __default_rt_sa_restorer_v1(void);
extern void __default_rt_sa_restorer_v2(void);
#ifdef __ASSUME_SIGFRAME_V2
# define __default_sa_restorer __default_sa_restorer_v2
# define __default_rt_sa_restorer __default_rt_sa_restorer_v2
#else
# include <ldsodefs.h>
# define __default_sa_restorer (GLRO(dl_osversion) >= 0x020612 \
? __default_sa_restorer_v2 \
: __default_sa_restorer_v1)
# define __default_rt_sa_restorer (GLRO(dl_osversion) >= 0x020612 \
? __default_rt_sa_restorer_v2 \
: __default_rt_sa_restorer_v1)
#endif
extern void __default_sa_restorer (void);
extern void __default_rt_sa_restorer (void);
/* When RT signals are in use we need to use a different return stub. */
#define choose_restorer(flags) \

43
sysdeps/unix/sysv/linux/arm/sigrestorer.S
View File

@ -28,10 +28,7 @@
Start the unwind tables at least one instruction before the signal
trampoline, because the unwinder will assume we are returning after
a call site.
Because the signal frame layout changed in 2.6.18, we provide two
copies of these functions with different unwind information. */
a call site. */
/* Used in ENTRY. */
#undef cfi_startproc
@ -60,58 +57,28 @@
cfi_offset (r14, OFFSET + 14 * 4); \
cfi_offset (r15, OFFSET + 15 * 4)
#ifndef __ASSUME_SIGFRAME_V2
#define OFFSET 12
.fnstart
.save {r0-r15}
.pad #OFFSET
nop
ENTRY(__default_sa_restorer_v1)
CFI
mov r7, $SYS_ify(sigreturn)
swi 0x0
.fnend
END(__default_sa_restorer_v1)
#undef OFFSET
#endif /* __ASSUME_SIGFRAME_V2 */
#define OFFSET 32
.fnstart
.save {r0-r15}
.pad #OFFSET
nop
ENTRY(__default_sa_restorer_v2)
ENTRY(__default_sa_restorer)
CFI
mov r7, $SYS_ify(sigreturn)
swi 0x0
.fnend
END(__default_sa_restorer_v2)
END(__default_sa_restorer)
#undef OFFSET
#ifndef __ASSUME_SIGFRAME_V2
#define OFFSET 168
.fnstart
.save {r0-r15}
.pad #OFFSET
nop
ENTRY(__default_rt_sa_restorer_v1)
CFI
mov r7, $SYS_ify(rt_sigreturn)
swi 0x0
.fnend
END(__default_rt_sa_restorer_v1)
#undef OFFSET
#endif /* __ASSUME_SIGFRAME_V2 */
#define OFFSET 160
.fnstart
.save {r0-r15}
.pad #OFFSET
nop
ENTRY(__default_rt_sa_restorer_v2)
ENTRY(__default_rt_sa_restorer)
CFI
mov r7, $SYS_ify(rt_sigreturn)
swi 0x0
.fnend
END(__default_rt_sa_restorer_v2)
END(__default_rt_sa_restorer)
#undef OFFSET