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Installed-header hygiene (BZ#20366): stack_t.

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sys/ucontext.h unconditionally uses stack_t, and it does not make
sense to change that.  But signal.h only declares stack_t under
__USE_XOPEN_EXTENDED || __USE_XOPEN2K8.  The actual definition is
already in a bits header, bits/sigstack.h, but that header insists on
only being included by signal.h, so we have to change that as well as
all of the sys/ucontext.h variants.  (Some but not all variants of
bits/sigcontext.h, which sys/ucontext.h may also need, had already
received this adjustment; for consistency, I made them all the same,
even if that's not strictly necessary in some configurations.)
bits/sigcontext.h and bits/sigstack.h also all need to receive
multiple inclusion guards.

	* sysdeps/generic/sys/ucontext.h
	* sysdeps/arm/sys/ucontext.h
	* sysdeps/i386/sys/ucontext.h
	* sysdeps/m68k/sys/ucontext.h
	* sysdeps/mips/sys/ucontext.h
	* sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h
	* sysdeps/unix/sysv/linux/alpha/sys/ucontext.h
	* sysdeps/unix/sysv/linux/arm/sys/ucontext.h
	* sysdeps/unix/sysv/linux/hppa/sys/ucontext.h
	* sysdeps/unix/sysv/linux/ia64/sys/ucontext.h
	* sysdeps/unix/sysv/linux/m68k/sys/ucontext.h
	* sysdeps/unix/sysv/linux/mips/sys/ucontext.h
	* sysdeps/unix/sysv/linux/nios2/sys/ucontext.h
	* sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h
	* sysdeps/unix/sysv/linux/s390/sys/ucontext.h
	* sysdeps/unix/sysv/linux/sh/sys/ucontext.h
	* sysdeps/unix/sysv/linux/sparc/sys/ucontext.h
	* sysdeps/unix/sysv/linux/tile/sys/ucontext.h
	* sysdeps/unix/sysv/linux/x86/sys/ucontext.h:
	Include both bits/sigcontext.h and bits/sigstack.h.
	Fix grammar error in comment, if present.

	* bits/sigstack.h
	* sysdeps/unix/sysv/linux/aarch64/bits/sigstack.h
	* sysdeps/unix/sysv/linux/alpha/bits/sigstack.h
	* sysdeps/unix/sysv/linux/bits/sigstack.h
	* sysdeps/unix/sysv/linux/ia64/bits/sigstack.h
	* sysdeps/unix/sysv/linux/mips/bits/sigstack.h
	* sysdeps/unix/sysv/linux/powerpc/bits/sigstack.h
	* sysdeps/unix/sysv/linux/sparc/bits/sigstack.h
	* bits/sigcontext.h
	* sysdeps/mach/hurd/i386/bits/sigcontext.h
	* sysdeps/unix/sysv/linux/bits/sigcontext.h
	* sysdeps/unix/sysv/linux/ia64/bits/sigcontext.h
	* sysdeps/unix/sysv/linux/sparc/bits/sigcontext.h:
	Add multiple inclusion guard.  Permit inclusion by sys/ucontext.h
	as well as signal.h, if this was not already allowed.  Request
	definition of size_t if necessary.  Minimize semantically-null
	differences across files.
This commit is contained in:
Zack Weinberg
2016-07-13 16:11:57 -04:00
parent 05b68e14b1
commit c66b29f9cc
33 changed files with 271 additions and 108 deletions
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25
sysdeps/unix/sysv/linux/powerpc/bits/sigstack.h
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@ -16,10 +16,15 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _SIGNAL_H
#ifndef _BITS_SIGSTACK_H
#define _BITS_SIGSTACK_H 1
#if !defined _SIGNAL_H && !defined _SYS_UCONTEXT_H
# error "Never include this file directly. Use <signal.h> instead"
#endif
#define __need_size_t
#include <stddef.h>
/* Structure describing a signal stack (obsolete). */
struct sigstack
@ -28,8 +33,15 @@ struct sigstack
int ss_onstack; /* Nonzero if executing on this stack. */
};
/* Alternate, preferred interface. */
typedef struct sigaltstack
{
void *ss_sp;
int ss_flags;
size_t ss_size;
} stack_t;
/* Possible values for `ss_flags.'. */
/* Possible values for `ss_flags'. */
enum
{
SS_ONSTACK = 1,
@ -44,11 +56,4 @@ enum
/* System default stack size. */
#define SIGSTKSZ 16384
/* Alternate, preferred interface. */
typedef struct sigaltstack
{
void *ss_sp;
int ss_flags;
size_t ss_size;
} stack_t;
#endif /* bits/sigstack.h */