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Factor out shared definitions from bits/signum.h.

Browse Source 
Many of the things defined by bits/signum.h are invariant across all
supported operating systems.  This patch factors out all of them to a
new header bits/signum-generic.h, which each bits/signum.h will include
and then override whichever things need adjustment.  Normally that will
mean, at most, adding or changing a few signal numbers.

A user-visible side effect is that the obsolete signal constant SIGUNUSED
(which is an alias for SIGSYS on all platforms that define it) is no
longer exposed by any version of bits/signum.h.

A side effect only relevant to glibc hackers is that _NSIG is now defined
in terms of __SIGRTMAX, instead of the other way around.  This is because
__SIGRTMAX varies from platform to platform, but _NSIG==__SIGRTMAX+1 is
true universally.  If your platform doesn't support realtime signals,
leave __SIGRTMAX equal to __SIGRTMIN.

I also added a Linux-specific test to make sure that our signal constants
match the ones in <asm/signal.h>, since we can't use that header (it's
not even vaguely namespace-clean).

	* bits/signum-generic.h: Renamed from bits/signum.h.
	Add proper multiple include guard and misuse check.
	Define __SIGRTMIN = __SIGRTMAX = 32, and define _NSIG = __SIGRTMAX+1.
	Move definition of SIGIO to "archaic names for compatibility" section.
	* bits/signum.h: New file which just includes bits/signum-generic.h.
	* sysdeps/unix/bsd/bits/signum.h
	* sysdeps/unix/sysv/linux/bits/signum.h
	* sysdeps/unix/sysv/linux/alpha/bits/signum.h
	* sysdeps/unix/sysv/linux/hppa/bits/signum.h
	* sysdeps/unix/sysv/linux/mips/bits/signum.h
	* sysdeps/unix/sysv/linux/sparc/bits/signum.h
	Just include <bits/signum-generic.h> and then add or adjust
	signal constants.  Do not define SIGUNUSED, SIGRTMIN, or SIGRTMAX.

	* signal/Makefile: Install bits/signum-generic.h.
	* signal/signal.h: Define SIGRTMIN and SIGRTMAX here.

	* sysdeps/generic/siglist.h: SIGSYS and SIGWINCH are
	universal.  Prefer SIGPOLL to SIGIO. Simplify #ifdeffage.

	* sysdeps/unix/sysv/linux/tst-signal-numbers.sh: New test.
	* sysdeps/unix/sysv/linux/Makefile: Run it.
This commit is contained in:
Zack Weinberg 2017-06-03 16:22:24 -04:00
parent af85385f31
commit 8082d91e1c
15 changed files with 413 additions and 402 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
ChangeLog
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@ -1,3 +1,28 @@
2017-06-20 Zack Weinberg <zackw@panix.com>
* bits/signum-generic.h: Renamed from bits/signum.h.
Add proper multiple include guard and misuse check.
Define __SIGRTMIN = __SIGRTMAX = 32, and define _NSIG = __SIGRTMAX+1.
Move definition of SIGIO to "archaic names for compatibility" section.
* bits/signum.h: New file which just includes bits/signum-generic.h.
* sysdeps/unix/bsd/bits/signum.h
* sysdeps/unix/sysv/linux/bits/signum.h
* sysdeps/unix/sysv/linux/alpha/bits/signum.h
* sysdeps/unix/sysv/linux/hppa/bits/signum.h
* sysdeps/unix/sysv/linux/mips/bits/signum.h
* sysdeps/unix/sysv/linux/sparc/bits/signum.h
Just include <bits/signum-generic.h> and then add or adjust
signal constants. Do not define SIGUNUSED, SIGRTMIN, or SIGRTMAX.
* signal/Makefile: Install bits/signum-generic.h.
* signal/signal.h: Define SIGRTMIN and SIGRTMAX here.
* sysdeps/generic/siglist.h: SIGSYS and SIGWINCH are
universal. Prefer SIGPOLL to SIGIO. Simplify #ifdeffage.
* sysdeps/unix/sysv/linux/tst-signal-numbers.sh: New test.
* sysdeps/unix/sysv/linux/Makefile: Run it.
2017-06-20 Zack Weinberg <zackw@panix.com>
* locale/xlocale.h: Rename to...

2
NEWS
View File

@ -78,6 +78,8 @@ Version 2.26
use <locale.h> instead. If you have a specific need for the definition
of locale_t with no other declarations, please talk to us.
* The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
* The reallocarray function has been added to libc. It is a realloc
replacement with a check for integer overflow when calculating total
allocation size.

102
bits/signum-generic.h Normal file
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@ -0,0 +1,102 @@
/* Signal number constants. Generic template.
Copyright (C) 1991-2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _BITS_SIGNUM_GENERIC_H
#define _BITS_SIGNUM_GENERIC_H 1
#ifndef _SIGNAL_H
#error "Never include <bits/signum-generic.h> directly; use <signal.h> instead."
#endif
/* Fake signal functions. */
#define SIG_ERR ((__sighandler_t) -1) /* Error return. */
#define SIG_DFL ((__sighandler_t) 0) /* Default action. */
#define SIG_IGN ((__sighandler_t) 1) /* Ignore signal. */
#ifdef __USE_XOPEN
# define SIG_HOLD ((__sighandler_t) 2) /* Add signal to hold mask. */
#endif
/* We define here all the signal names listed in POSIX (1003.1-2008);
as of 1003.1-2013, no additional signals have been added by POSIX.
We also define here signal names that historically exist in every
real-world POSIX variant (e.g. SIGWINCH).
Signals in the 1-15 range are defined with their historical numbers.
For other signals, we use the BSD numbers.
There are two unallocated signal numbers in the 1-31 range: 7 and 29.
Signal number 0 is reserved for use as kill(pid, 0), to test whether
a process exists without sending it a signal. */
/* ISO C99 signals. */
#define SIGINT 2 /* Interactive attention signal. */
#define SIGILL 4 /* Illegal instruction. */
#define SIGABRT 6 /* Abnormal termination. */
#define SIGFPE 8 /* Erroneous arithmetic operation. */
#define SIGSEGV 11 /* Invalid access to storage. */
#define SIGTERM 15 /* Termination request. */
/* Historical signals specified by POSIX. */
#define SIGHUP 1 /* Hangup. */
#define SIGQUIT 3 /* Quit. */
#define SIGTRAP 5 /* Trace/breakpoint trap. */
#define SIGKILL 9 /* Killed. */
#define SIGBUS 10 /* Bus error. */
#define SIGSYS 12 /* Bad system call. */
#define SIGPIPE 13 /* Broken pipe. */
#define SIGALRM 14 /* Alarm clock. */
/* New(er) POSIX signals (1003.1-2008, 1003.1-2013). */
#define SIGURG 16 /* Urgent data is available at a socket. */
#define SIGSTOP 17 /* Stop, unblockable. */
#define SIGTSTP 18 /* Keyboard stop. */
#define SIGCONT 19 /* Continue. */
#define SIGCHLD 20 /* Child terminated or stopped. */
#define SIGTTIN 21 /* Background read from control terminal. */
#define SIGTTOU 22 /* Background write to control terminal. */
#define SIGPOLL 23 /* Pollable event occurred (System V). */
#define SIGXCPU 24 /* CPU time limit exceeded. */
#define SIGXFSZ 25 /* File size limit exceeded. */
#define SIGVTALRM 26 /* Virtual timer expired. */
#define SIGPROF 27 /* Profiling timer expired. */
#define SIGUSR1 30 /* User-defined signal 1. */
#define SIGUSR2 31 /* User-defined signal 2. */
/* Nonstandard signals found in all modern POSIX systems
(including both BSD and Linux). */
#define SIGWINCH 28 /* Window size change (4.3 BSD, Sun). */
/* Archaic names for compatibility. */
#define SIGIO SIGPOLL /* I/O now possible (4.2 BSD). */
#define SIGIOT SIGABRT /* IOT instruction, abort() on a PDP-11. */
#define SIGCLD SIGCHLD /* Old System V name */
/* Not all systems support real-time signals. bits/signum.h indicates
that they are supported by overriding __SIGRTMAX to a value greater
than __SIGRTMIN. These constants give the kernel-level hard limits,
but some real-time signals may be used internally by glibc. Do not
use these constants in application code; use SIGRTMIN and SIGRTMAX
(defined in signal.h) instead. */
#define __SIGRTMIN 32
#define __SIGRTMAX __SIGRTMIN
/* Biggest signal number + 1 (including real-time signals). */
#define _NSIG (__SIGRTMAX + 1)
#endif /* bits/signum-generic.h. */

72
bits/signum.h
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@ -1,5 +1,5 @@
/* Signal number constants. Generic version.
Copyright (C) 1991-2017 Free Software Foundation, Inc.
Copyright (C) 2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -16,69 +16,17 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifdef _SIGNAL_H
#ifndef _BITS_SIGNUM_H
#define _BITS_SIGNUM_H 1
/* Fake signal functions. */
#define SIG_ERR ((__sighandler_t) -1) /* Error return. */
#define SIG_DFL ((__sighandler_t) 0) /* Default action. */
#define SIG_IGN ((__sighandler_t) 1) /* Ignore signal. */
#ifdef __USE_XOPEN
# define SIG_HOLD ((__sighandler_t) 2) /* Add signal to hold mask. */
#ifndef _SIGNAL_H
#error "Never include <bits/signum.h> directly; use <signal.h> instead."
#endif
/* We define here all the signal names listed in POSIX (1003.1-2008);
as of 1003.1-2013, no additional signals have been added by POSIX.
We also define here signal names that historically exist in every
real-world POSIX variant (e.g. SIGWINCH).
#include <bits/signum-generic.h>
Signals in the 1-15 range are defined with their historical numbers.
For other signals, we use the BSD numbers. */
/* This operating system does not need to override any of the generic
signal number assignments in bits/signum-generic.h, nor to add any
additional signal constants. */
/* ISO C99 signals. */
#define SIGINT 2 /* Interactive attention signal. */
#define SIGILL 4 /* Illegal instruction. */
#define SIGABRT 6 /* Abnormal termination. */
#define SIGFPE 8 /* Erroneous arithmetic operation. */
#define SIGSEGV 11 /* Invalid access to storage. */
#define SIGTERM 15 /* Termination request. */
/* Historical signals specified by POSIX. */
#define SIGHUP 1 /* Hangup. */
#define SIGQUIT 3 /* Quit. */
#define SIGTRAP 5 /* Trace/breakpoint trap. */
#define SIGKILL 9 /* Killed. */
#define SIGBUS 10 /* Bus error. */
#define SIGSYS 12 /* Bad system call. */
#define SIGPIPE 13 /* Broken pipe. */
#define SIGALRM 14 /* Alarm clock. */
/* New(er) POSIX signals (1003.1-2008, 1003.1-2013). */
#define SIGURG 16 /* High bandwidth data is available at a socket. */
#define SIGSTOP 17 /* Stopped (signal). */
#define SIGTSTP 18 /* Stopped. */
#define SIGCONT 19 /* Continued. */
#define SIGCHLD 20 /* Child terminated or stopped. */
#define SIGTTIN 21 /* Background read from control terminal. */
#define SIGTTOU 22 /* Background write to control terminal. */
#define SIGPOLL 23 /* Pollable event occurred (System V). */
#define SIGIO SIGPOLL /* I/O now possible (4.2 BSD). */
#define SIGXCPU 24 /* CPU time limit exceeded. */
#define SIGXFSZ 25 /* File size limit exceeded. */
#define SIGVTALRM 26 /* Virtual timer expired. */
#define SIGPROF 27 /* Profiling timer expired. */
#define SIGUSR1 30 /* User-defined signal 1. */
#define SIGUSR2 31 /* User-defined signal 2. */
/* Nonstandard signals found in all modern POSIX systems
(including both BSD and Linux). */
#define SIGWINCH 28 /* Window size change (4.3 BSD, Sun). */
#define _NSIG 32
/* Archaic names for compatibility. */
#define SIGIOT SIGABRT /* IOT instruction, abort() on a PDP-11. */
#define SIGCLD SIGCHLD /* Old System V name */
#endif /* <signal.h> included. */
#endif /* bits/signum.h. */

3
signal/Makefile
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@ -23,7 +23,8 @@ subdir := signal
include ../Makeconfig
headers := signal.h sys/signal.h \
bits/signum.h bits/sigcontext.h bits/sigaction.h \
bits/signum.h bits/signum-generic.h \
bits/sigcontext.h bits/sigaction.h \
bits/sigevent-consts.h bits/siginfo-consts.h \
bits/sigstack.h bits/sigthread.h bits/ss_flags.h \
bits/types/__sigset_t.h bits/types/sig_atomic_t.h \

3
signal/signal.h
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@ -363,6 +363,9 @@ extern int __libc_current_sigrtmin (void) __THROW;
/* Return number of available real-time signal with lowest priority. */
extern int __libc_current_sigrtmax (void) __THROW;
#define SIGRTMIN (__libc_current_sigrtmin ())
#define SIGRTMAX (__libc_current_sigrtmax ())
__END_DECLS
#endif /* not signal.h */

24
sysdeps/generic/siglist.h
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@ -24,7 +24,8 @@
/* This file is included multiple times. */
/* Standard signals */
/* Standard signals, in the numerical order defined in
bits/signum-generic.h. */
init_sig (SIGHUP, "HUP", N_("Hangup"))
init_sig (SIGINT, "INT", N_("Interrupt"))
init_sig (SIGQUIT, "QUIT", N_("Quit"))
@ -34,6 +35,7 @@
init_sig (SIGFPE, "FPE", N_("Floating point exception"))
init_sig (SIGKILL, "KILL", N_("Killed"))
init_sig (SIGBUS, "BUS", N_("Bus error"))
init_sig (SIGSYS, "SYS", N_("Bad system call"))
init_sig (SIGSEGV, "SEGV", N_("Segmentation fault"))
init_sig (SIGPIPE, "PIPE", N_("Broken pipe"))
init_sig (SIGALRM, "ALRM", N_("Alarm clock"))
@ -45,32 +47,28 @@
init_sig (SIGCHLD, "CHLD", N_("Child exited"))
init_sig (SIGTTIN, "TTIN", N_("Stopped (tty input)"))
init_sig (SIGTTOU, "TTOU", N_("Stopped (tty output)"))
init_sig (SIGIO, "IO", N_("I/O possible"))
init_sig (SIGPOLL, "POLL", N_("I/O possible"))
init_sig (SIGXCPU, "XCPU", N_("CPU time limit exceeded"))
init_sig (SIGXFSZ, "XFSZ", N_("File size limit exceeded"))
init_sig (SIGVTALRM, "VTALRM", N_("Virtual timer expired"))
init_sig (SIGPROF, "PROF", N_("Profiling timer expired"))
init_sig (SIGUSR1, "USR1", N_("User defined signal 1"))
init_sig (SIGUSR2, "USR2", N_("User defined signal 2"))
init_sig (SIGWINCH, "WINCH", N_("Window changed"))
/* Variations */
/* Signals that are not present on all supported platforms. */
#ifdef SIGEMT
init_sig (SIGEMT, "EMT", N_("EMT trap"))
#endif
#ifdef SIGSYS
init_sig (SIGSYS, "SYS", N_("Bad system call"))
#endif
#ifdef SIGSTKFLT
init_sig (SIGSTKFLT, "STKFLT", N_("Stack fault"))
#endif
#ifdef SIGINFO
init_sig (SIGINFO, "INFO", N_("Information request"))
#elif defined(SIGPWR) && (!defined(SIGLOST) || (SIGPWR != SIGLOST))
#ifdef SIGPWR
init_sig (SIGPWR, "PWR", N_("Power failure"))
#endif
#ifdef SIGLOST
#if defined SIGINFO && (!defined SIGPWR || SIGPWR != SIGINFO)
init_sig (SIGINFO, "INFO", N_("Information request"))
#endif
#if defined SIGLOST && (!defined SIGPWR || SIGPWR != SIGLOST)
init_sig (SIGLOST, "LOST", N_("Resource lost"))
#endif
#ifdef SIGWINCH
init_sig (SIGWINCH, "WINCH", N_("Window changed"))
#endif

58
sysdeps/unix/bsd/bits/signum.h
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@ -16,58 +16,20 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifdef _SIGNAL_H
#ifndef _BITS_SIGNUM_H
#define _BITS_SIGNUM_H 1
/* This file defines the fake signal functions and signal
number constants for 4.2 or 4.3 BSD-derived Unix system. */
/* Fake signal functions. */
#define SIG_ERR ((__sighandler_t) -1) /* Error return. */
#define SIG_DFL ((__sighandler_t) 0) /* Default action. */
#define SIG_IGN ((__sighandler_t) 1) /* Ignore signal. */
#ifdef __USE_XOPEN
# define SIG_HOLD ((__sighandler_t) 2) /* Add signal to hold mask. */
#ifndef _SIGNAL_H
#error "Never include <bits/signum.h> directly; use <signal.h> instead."
#endif
#include <bits/signum-generic.h>
/* Signals. */
#define SIGHUP 1 /* Hangup (POSIX). */
#define SIGINT 2 /* Interrupt (ANSI). */
#define SIGQUIT 3 /* Quit (POSIX). */
#define SIGILL 4 /* Illegal instruction (ANSI). */
#define SIGABRT SIGIOT /* Abort (ANSI). */
#define SIGTRAP 5 /* Trace trap (POSIX). */
#define SIGIOT 6 /* IOT trap (4.2 BSD). */
#define SIGEMT 7 /* EMT trap (4.2 BSD). */
#define SIGFPE 8 /* Floating-point exception (ANSI). */
#define SIGKILL 9 /* Kill, unblockable (POSIX). */
#define SIGBUS 10 /* Bus error (4.2 BSD). */
#define SIGSEGV 11 /* Segmentation violation (ANSI). */
#define SIGSYS 12 /* Bad argument to system call (4.2 BSD). */
#define SIGPIPE 13 /* Broken pipe (POSIX). */
#define SIGALRM 14 /* Alarm clock (POSIX). */
#define SIGTERM 15 /* Termination (ANSI). */
#define SIGURG 16 /* Urgent condition on socket (4.2 BSD). */
#define SIGSTOP 17 /* Stop, unblockable (POSIX). */
#define SIGTSTP 18 /* Keyboard stop (POSIX). */
#define SIGCONT 19 /* Continue (POSIX). */
#define SIGCHLD 20 /* Child status has changed (POSIX). */
#define SIGCLD SIGCHLD /* Same as SIGCHLD (System V). */
#define SIGTTIN 21 /* Background read from tty (POSIX). */
#define SIGTTOU 22 /* Background write to tty (POSIX). */
#define SIGIO 23 /* I/O now possible (4.2 BSD). */
#define SIGPOLL SIGIO /* Same as SIGIO? (SVID). */
#define SIGXCPU 24 /* CPU limit exceeded (4.2 BSD). */
#define SIGXFSZ 25 /* File size limit exceeded (4.2 BSD). */
#define SIGVTALRM 26 /* Virtual alarm clock (4.2 BSD). */
#define SIGPROF 27 /* Profiling alarm clock (4.2 BSD). */
#define SIGWINCH 28 /* Window size change (4.3 BSD, Sun). */
/* Adjustments and additions to the signal number constants for
4.2 or 4.3 BSD-derived Unix systems. */
#define SIGEMT 7 /* Emulator trap (4.2 BSD). */
#define SIGINFO 29 /* Information request (4.4 BSD). */
#define SIGUSR1 30 /* User-defined signal 1 (POSIX). */
#define SIGUSR2 31 /* User-defined signal 2 (POSIX). */
#define SIGLOST 32 /* Resource lost (Sun); server died (GNU). */
#endif /* <signal.h> included. */
#define _NSIG 33 /* Biggest signal number + 1. */
#endif /* bits/signum.h. */

14
sysdeps/unix/sysv/linux/Makefile
View File

@ -128,6 +128,20 @@ sysdep_headers += sys/timex.h bits/timex.h
sysdep_routines += ntp_gettime ntp_gettimex
endif
ifeq ($(subdir),signal)
tests-special += $(objpfx)tst-signal-numbers.out
# Depending on signal.o* is a hack. What we actually want is a dependency
# on signal.h and everything it includes. That's impractical to write
# in this context, but signal.c includes signal.h and not much else so it'll
# be conservatively correct.
$(objpfx)tst-signal-numbers.out: \
../sysdeps/unix/sysv/linux/tst-signal-numbers.sh \
$(objpfx)signal.o*
AWK=$(AWK) $(SHELL) ../sysdeps/unix/sysv/linux/tst-signal-numbers.sh \
$(CC) $(patsubst -DMODULE_NAME=%,-DMODULE_NAME=testsuite,$(CPPFLAGS)) \
< /dev/null > $@; $(evaluate-test)
endif
ifeq ($(subdir),socket)
sysdep_headers += net/if_ppp.h net/ppp-comp.h \
net/ppp_defs.h net/if_arp.h net/route.h net/ethernet.h \

69
sysdeps/unix/sysv/linux/alpha/bits/signum.h
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@ -16,66 +16,25 @@
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#ifdef _SIGNAL_H
#ifndef _BITS_SIGNUM_H
#define _BITS_SIGNUM_H 1
/* Fake signal functions. */
#define SIG_ERR ((__sighandler_t) -1) /* Error return. */
#define SIG_DFL ((__sighandler_t) 0) /* Default action. */
#define SIG_IGN ((__sighandler_t) 1) /* Ignore signal. */
#ifdef __USE_XOPEN
# define SIG_HOLD ((__sighandler_t) 2) /* Add signal to hold mask. */
#ifndef _SIGNAL_H
#error "Never include <bits/signum.h> directly; use <signal.h> instead."
#endif
/*
* Linux/AXP has different signal numbers that Linux/i386: I'm trying
* to make it OSF/1 binary compatible, at least for normal binaries.
*/
#define SIGHUP 1
#define SIGINT 2
#define SIGQUIT 3
#define SIGILL 4
#define SIGTRAP 5
#define SIGABRT 6
#define SIGEMT 7
#define SIGFPE 8
#define SIGKILL 9
#define SIGBUS 10
#define SIGSEGV 11
#define SIGSYS 12
#define SIGPIPE 13
#define SIGALRM 14
#define SIGTERM 15
#define SIGURG 16
#define SIGSTOP 17
#define SIGTSTP 18
#define SIGCONT 19
#define SIGCHLD 20
#define SIGCLD SIGCHLD
#define SIGTTIN 21
#define SIGTTOU 22
#define SIGIO 23
#define SIGXCPU 24
#define SIGXFSZ 25
#define SIGVTALRM 26
#define SIGPROF 27
#define SIGWINCH 28
#define SIGINFO 29
#define SIGUSR1 30
#define SIGUSR2 31
#include <bits/signum-generic.h>
#define SIGPOLL SIGIO
#define SIGPWR SIGINFO
#define SIGIOT SIGABRT
/* Adjustments and additions to the signal number constants for
Linux/Alpha. Signal values on this platform were chosen for OSF/1
binary compatibility, and are therefore almost identical to the
BSD-derived defaults. */
#define _NSIG 65 /* Biggest signal number + 1. */
#define SIGEMT 7 /* Emulator trap (4.2 BSD). */
#define SIGINFO 29 /* Information request (BSD). */
#define SIGPWR SIGINFO /* Power failure imminent (System V). */
#define SIGRTMIN (__libc_current_sigrtmin ())
#define SIGRTMAX (__libc_current_sigrtmax ())
/* These are the hard limits of the kernel. These values should not be
used directly at user level. */
#define __SIGRTMIN 32
#define __SIGRTMAX (_NSIG - 1)
#undef __SIGRTMAX
#define __SIGRTMAX 64
#endif /* <signal.h> included. */

83
sysdeps/unix/sysv/linux/bits/signum.h
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@ -16,64 +16,43 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifdef _SIGNAL_H
#ifndef _BITS_SIGNUM_H
#define _BITS_SIGNUM_H 1
/* Fake signal functions. */
#define SIG_ERR ((__sighandler_t) -1) /* Error return. */
#define SIG_DFL ((__sighandler_t) 0) /* Default action. */
#define SIG_IGN ((__sighandler_t) 1) /* Ignore signal. */
#ifdef __USE_XOPEN
# define SIG_HOLD ((__sighandler_t) 2) /* Add signal to hold mask. */
#ifndef _SIGNAL_H
#error "Never include <bits/signum.h> directly; use <signal.h> instead."
#endif
#include <bits/signum-generic.h>
/* Signals. */
#define SIGHUP 1 /* Hangup (POSIX). */
#define SIGINT 2 /* Interrupt (ANSI). */
#define SIGQUIT 3 /* Quit (POSIX). */
#define SIGILL 4 /* Illegal instruction (ANSI). */
#define SIGTRAP 5 /* Trace trap (POSIX). */
#define SIGABRT 6 /* Abort (ANSI). */
#define SIGIOT 6 /* IOT trap (4.2 BSD). */
#define SIGBUS 7 /* BUS error (4.2 BSD). */
#define SIGFPE 8 /* Floating-point exception (ANSI). */
#define SIGKILL 9 /* Kill, unblockable (POSIX). */
#define SIGUSR1 10 /* User-defined signal 1 (POSIX). */
#define SIGSEGV 11 /* Segmentation violation (ANSI). */
#define SIGUSR2 12 /* User-defined signal 2 (POSIX). */
#define SIGPIPE 13 /* Broken pipe (POSIX). */
#define SIGALRM 14 /* Alarm clock (POSIX). */
#define SIGTERM 15 /* Termination (ANSI). */
#define SIGSTKFLT 16 /* Stack fault. */
#define SIGCLD SIGCHLD /* Same as SIGCHLD (System V). */
#define SIGCHLD 17 /* Child status has changed (POSIX). */
#define SIGCONT 18 /* Continue (POSIX). */
#define SIGSTOP 19 /* Stop, unblockable (POSIX). */
#define SIGTSTP 20 /* Keyboard stop (POSIX). */
#define SIGTTIN 21 /* Background read from tty (POSIX). */
#define SIGTTOU 22 /* Background write to tty (POSIX). */
#define SIGURG 23 /* Urgent condition on socket (4.2 BSD). */
#define SIGXCPU 24 /* CPU limit exceeded (4.2 BSD). */
#define SIGXFSZ 25 /* File size limit exceeded (4.2 BSD). */
#define SIGVTALRM 26 /* Virtual alarm clock (4.2 BSD). */
#define SIGPROF 27 /* Profiling alarm clock (4.2 BSD). */
#define SIGWINCH 28 /* Window size change (4.3 BSD, Sun). */
#define SIGPOLL SIGIO /* Pollable event occurred (System V). */
#define SIGIO 29 /* I/O now possible (4.2 BSD). */
#define SIGPWR 30 /* Power failure restart (System V). */
#define SIGSYS 31 /* Bad system call. */
#define SIGUNUSED 31
/* Adjustments and additions to the signal number constants for
most Linux systems. */
#define _NSIG 65 /* Biggest signal number + 1
(including real-time signals). */
#define SIGSTKFLT 16 /* Stack fault (obsolete). */
#define SIGPWR 30 /* Power failure imminent. */
#define SIGRTMIN (__libc_current_sigrtmin ())
#define SIGRTMAX (__libc_current_sigrtmax ())
#undef SIGBUS
#define SIGBUS 7
#undef SIGUSR1
#define SIGUSR1 10
#undef SIGUSR2
#define SIGUSR2 12
#undef SIGCHLD
#define SIGCHLD 17
#undef SIGCONT
#define SIGCONT 18
#undef SIGSTOP
#define SIGSTOP 19
#undef SIGTSTP
#define SIGTSTP 20
#undef SIGURG
#define SIGURG 23
#undef SIGPOLL
#define SIGPOLL 29
#undef SIGSYS
#define SIGSYS 31
/* These are the hard limits of the kernel. These values should not be
used directly at user level. */
#define __SIGRTMIN 32
#define __SIGRTMAX (_NSIG - 1)
#undef __SIGRTMAX
#define __SIGRTMAX 64
#endif /* <signal.h> included. */

110
sysdeps/unix/sysv/linux/hppa/bits/signum.h
View File

@ -16,74 +16,60 @@
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#ifdef _SIGNAL_H
#ifndef _BITS_SIGNUM_H
#define _BITS_SIGNUM_H 1
/* Fake signal functions. */
#define SIG_ERR ((__sighandler_t) -1) /* Error return. */
#define SIG_DFL ((__sighandler_t) 0) /* Default action. */
#define SIG_IGN ((__sighandler_t) 1) /* Ignore signal. */
#ifdef __USE_XOPEN
# define SIG_HOLD ((__sighandler_t) 2) /* Add signal to hold mask. */
#ifndef _SIGNAL_H
#error "Never include <bits/signum.h> directly; use <signal.h> instead."
#endif
#include <bits/signum-generic.h>
/* Signals. */
#define SIGHUP 1 /* Hangup (POSIX). */
#define SIGINT 2 /* Interrupt (ANSI). */
#define SIGQUIT 3 /* Quit (POSIX). */
#define SIGILL 4 /* Illegal instruction (ANSI). */
#define SIGTRAP 5 /* Trace trap (POSIX). */
#define SIGABRT 6 /* Abort (ANSI). */
#define SIGIOT 6 /* IOT trap (4.2 BSD). */
#define SIGSTKFLT 7 /* Stack fault. */
#define SIGFPE 8 /* Floating-point exception (ANSI). */
#define SIGKILL 9 /* Kill, unblockable (POSIX). */
#define SIGBUS 10 /* BUS error (4.2 BSD). */
#define SIGSEGV 11 /* Segmentation violation (ANSI). */
#define SIGXCPU 12 /* CPU limit exceeded (4.2 BSD). */
#define SIGPIPE 13 /* Broken pipe (POSIX). */
#define SIGALRM 14 /* Alarm clock (POSIX). */
#define SIGTERM 15 /* Termination (ANSI). */
#define SIGUSR1 16 /* User-defined signal 1 (POSIX). */
#define SIGUSR2 17 /* User-defined signal 2 (POSIX). */
#define SIGCLD SIGCHLD /* Same as SIGCHLD (System V). */
#define SIGCHLD 18 /* Child status has changed (POSIX). */
#define SIGPWR 19 /* Power failure restart (System V). */
#define SIGVTALRM 20 /* Virtual alarm clock (4.2 BSD). */
#define SIGPROF 21 /* Profiling alarm clock (4.2 BSD). */
#define SIGPOLL SIGIO /* Pollable event occurred (System V). */
#define SIGIO 22 /* I/O now possible (4.2 BSD). */
#define SIGWINCH 23 /* Window size change (4.3 BSD, Sun). */
#define SIGSTOP 24 /* Stop, unblockable (POSIX). */
#define SIGTSTP 25 /* Keyboard stop (POSIX). */
#define SIGCONT 26 /* Continue (POSIX). */
#define SIGTTIN 27 /* Background read from tty (POSIX). */
#define SIGTTOU 28 /* Background write to tty (POSIX). */
#define SIGURG 29 /* Urgent condition on socket (4.2 BSD). */
#define SIGXFSZ 30 /* File size limit exceeded (4.2 BSD). */
#define SIGSYS 31 /* Bad system call. */
#define SIGUNUSED 31
/* Adjustments and additions to the signal number constants for
Linux/HPPA. These values were originally chosen for HP/UX
compatibility, but were renumbered as of kernel 3.17 and glibc 2.21
to accommodate software (notably systemd) that assumed at least 29
real-time signal numbers would be available. SIGEMT and SIGLOST
were removed, and the values of SIGSTKFLT, SIGXCPU, XIGXFSZ, and
SIGSYS were changed, enabling __SIGRTMIN to be 32. */
#define _NSIG 65 /* Biggest signal number + 1
(including real-time signals). */
#define SIGSTKFLT 7 /* Stack fault (obsolete). */
#define SIGPWR 19 /* Power failure imminent. */
#define SIGRTMIN (__libc_current_sigrtmin ())
#define SIGRTMAX (__libc_current_sigrtmax ())
#undef SIGXCPU
#define SIGXCPU 12
#undef SIGUSR1
#define SIGUSR1 16
#undef SIGUSR2
#define SIGUSR2 17
#undef SIGCHLD
#define SIGCHLD 18
#undef SIGVTALRM
#define SIGVTALRM 20
#undef SIGPROF
#define SIGPROF 21
#undef SIGPOLL
#define SIGPOLL 22
#undef SIGWINCH
#define SIGWINCH 23
#undef SIGSTOP
#define SIGSTOP 24
#undef SIGTSTP
#define SIGTSTP 25
#undef SIGCONT
#define SIGCONT 26
#undef SIGTTIN
#define SIGTTIN 27
#undef SIGTTOU
#define SIGTTOU 28
#undef SIGURG
#define SIGURG 29
#undef SIGXFSZ
#define SIGXFSZ 30
#undef SIGSYS
#define SIGSYS 31
/* These are the hard limits of the kernel. These values should not be
used directly at user level. */
/* In the Linux kernel version 3.17, and glibc 2.21, the signal numbers
were rearranged in order to make hppa like every other arch. Previously
we started __SIGRTMIN at 37, and that meant several pieces of important
software, including systemd, would fail to build. To support systemd we
removed SIGEMT and SIGLOST, and rearranged the others according to
expected values. This is technically an ABI incompatible change, but
because zero applications use SIGSTKFLT, SIGXCPU, SIGXFSZ and SIGSYS
nothing broke. Nothing uses SIGEMT and SIGLOST, and they were present
for HPUX compatibility which is no longer supported. Thus because
nothing breaks we don't do any compatibility work here. */
#define __SIGRTMIN 32 /* Kernel > 3.17. */
#define __SIGRTMAX (_NSIG - 1)
#undef __SIGRTMAX
#define __SIGRTMAX 64
#endif /* <signal.h> included. */

94
sysdeps/unix/sysv/linux/mips/bits/signum.h
View File

@ -1,4 +1,4 @@
/* Signal number definitions. Linux version.
/* Signal number definitions. Linux/MIPS version.
Copyright (C) 1995-2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
@ -16,63 +16,53 @@
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#ifdef _SIGNAL_H
#ifndef _BITS_SIGNUM_H
#define _BITS_SIGNUM_H 1
/* Fake signal functions. */
#define SIG_ERR ((__sighandler_t) -1) /* Error return. */
#define SIG_DFL ((__sighandler_t) 0) /* Default action. */
#define SIG_IGN ((__sighandler_t) 1) /* Ignore signal. */
#ifdef __USE_XOPEN
# define SIG_HOLD ((__sighandler_t) 2) /* Add signal to hold mask. */
#ifndef _SIGNAL_H
#error "Never include <bits/signum.h> directly; use <signal.h> instead."
#endif
#include <bits/signum-generic.h>
#define SIGHUP 1 /* Hangup (POSIX). */
#define SIGINT 2 /* Interrupt (ANSI). */
#define SIGQUIT 3 /* Quit (POSIX). */
#define SIGILL 4 /* Illegal instruction (ANSI). */
#define SIGTRAP 5 /* Trace trap (POSIX). */
#define SIGIOT 6 /* IOT trap (4.2 BSD). */
#define SIGABRT SIGIOT /* Abort (ANSI). */
#define SIGEMT 7
#define SIGFPE 8 /* Floating-point exception (ANSI). */
#define SIGKILL 9 /* Kill, unblockable (POSIX). */
#define SIGBUS 10 /* BUS error (4.2 BSD). */
#define SIGSEGV 11 /* Segmentation violation (ANSI). */
#define SIGSYS 12
#define SIGPIPE 13 /* Broken pipe (POSIX). */
#define SIGALRM 14 /* Alarm clock (POSIX). */
#define SIGTERM 15 /* Termination (ANSI). */
#define SIGUSR1 16 /* User-defined signal 1 (POSIX). */
#define SIGUSR2 17 /* User-defined signal 2 (POSIX). */
#define SIGCHLD 18 /* Child status has changed (POSIX). */
#define SIGCLD SIGCHLD /* Same as SIGCHLD (System V). */
#define SIGPWR 19 /* Power failure restart (System V). */
#define SIGWINCH 20 /* Window size change (4.3 BSD, Sun). */
#define SIGURG 21 /* Urgent condition on socket (4.2 BSD). */
#define SIGIO 22 /* I/O now possible (4.2 BSD). */
#define SIGPOLL SIGIO /* Pollable event occurred (System V). */
#define SIGSTOP 23 /* Stop, unblockable (POSIX). */
#define SIGTSTP 24 /* Keyboard stop (POSIX). */
#define SIGCONT 25 /* Continue (POSIX). */
#define SIGTTIN 26 /* Background read from tty (POSIX). */
#define SIGTTOU 27 /* Background write to tty (POSIX). */
#define SIGVTALRM 28 /* Virtual alarm clock (4.2 BSD). */
#define SIGPROF 29 /* Profiling alarm clock (4.2 BSD). */
#define SIGXCPU 30 /* CPU limit exceeded (4.2 BSD). */
#define SIGXFSZ 31 /* File size limit exceeded (4.2 BSD). */
/* Adjustments and additions to the signal number constants for
Linux/MIPS. */
#define SIGEMT 7 /* Emulator trap. */
#define SIGPWR 19 /* Power failure imminent. */
#define _NSIG 128 /* Biggest signal number + 1
(including real-time signals). */
#undef SIGUSR1
#define SIGUSR1 16
#undef SIGUSR2
#define SIGUSR2 17
#undef SIGCHLD
#define SIGCHLD 18
#undef SIGWINCH
#define SIGWINCH 20
#undef SIGURG
#define SIGURG 21
#undef SIGPOLL
#define SIGPOLL 22
#undef SIGSTOP
#define SIGSTOP 23
#undef SIGTSTP
#define SIGTSTP 24
#undef SIGCONT
#define SIGCONT 25
#undef SIGTTIN
#define SIGTTIN 26
#undef SIGTTOU
#define SIGTTOU 27
#undef SIGVTALRM
#define SIGVTALRM 28
#undef SIGPROF
#define SIGPROF 29
#undef SIGXCPU
#define SIGXCPU 30
#undef SIGXFSZ
#define SIGXFSZ 31
#define SIGRTMIN (__libc_current_sigrtmin ())
#define SIGRTMAX (__libc_current_sigrtmax ())
/* These are the hard limits of the kernel. These values should not be
used directly at user level. */
#define __SIGRTMIN 32
#define __SIGRTMAX (_NSIG - 1)
#undef __SIGRTMAX
#define __SIGRTMAX 127
#endif /* <signal.h> included. */

70
sysdeps/unix/sysv/linux/sparc/bits/signum.h
View File

@ -16,68 +16,24 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifdef _SIGNAL_H
#ifndef _BITS_SIGNUM_H
#define _BITS_SIGNUM_H 1
/* Fake signal functions. */
#define SIG_ERR ((__sighandler_t) -1) /* Error return. */
#define SIG_DFL ((__sighandler_t) 0) /* Default action. */
#define SIG_IGN ((__sighandler_t) 1) /* Ignore signal. */
#ifdef __USE_XOPEN
# define SIG_HOLD ((__sighandler_t) 2) /* Add signal to hold mask. */
#ifndef _SIGNAL_H
#error "Never include <bits/signum.h> directly; use <signal.h> instead."
#endif
/*
* Linux/SPARC has different signal numbers that Linux/i386: I'm trying
* to make it OSF/1 binary compatible, at least for normal binaries.
*/
#define SIGHUP 1
#define SIGINT 2
#define SIGQUIT 3
#define SIGILL 4
#define SIGTRAP 5
#define SIGABRT 6
#define SIGIOT 6
#define SIGEMT 7
#define SIGFPE 8
#define SIGKILL 9
#define SIGBUS 10
#define SIGSEGV 11
#define SIGSYS 12
#define SIGPIPE 13
#define SIGALRM 14
#define SIGTERM 15
#define SIGURG 16
#include <bits/signum-generic.h>
/* SunOS values which deviate from the Linux/i386 ones */
#define SIGSTOP 17
#define SIGTSTP 18
#define SIGCONT 19
#define SIGCHLD 20
#define SIGCLD SIGCHLD /* Same as SIGCHLD (System V). */
#define SIGTTIN 21
#define SIGTTOU 22
#define SIGIO 23
#define SIGPOLL SIGIO /* SysV name for SIGIO */
#define SIGXCPU 24
#define SIGXFSZ 25
#define SIGVTALRM 26
#define SIGPROF 27
#define SIGWINCH 28
#define SIGLOST 29
#define SIGPWR SIGLOST
#define SIGUSR1 30
#define SIGUSR2 31
/* Adjustments and additions to the signal number constants for
Linux/SPARC systems. Signal values on this platform were chosen
for SunOS binary compatibility. */
#define _NSIG 65 /* Biggest signal number + 1
(including real-time signals). */
#define SIGEMT 7 /* Emulator trap. */
#define SIGLOST 29 /* Resource lost (Sun); server died (GNU). */
#define SIGPWR SIGLOST /* Power failure imminent (SysV). */
#define SIGRTMIN (__libc_current_sigrtmin ())
#define SIGRTMAX (__libc_current_sigrtmax ())
/* These are the hard limits of the kernel. These values should not be
used directly at user level. */
#define __SIGRTMIN 32
#define __SIGRTMAX (_NSIG - 1)
#undef __SIGRTMAX
#define __SIGRTMAX 64
#endif /* <signal.h> included. */

86
sysdeps/unix/sysv/linux/tst-signal-numbers.sh Normal file
View File

@ -0,0 +1,86 @@
#! /bin/sh
# Test that glibc's signal numbers match the kernel's.
# Copyright (C) 2017 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
# The GNU C Library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
# You should have received a copy of the GNU Lesser General Public
# License along with the GNU C Library; if not, see
# <http://www.gnu.org/licenses/>.
set -e
if [ -n "$BASH_VERSION" ]; then set -o pipefail; fi
LC_ALL=C; export LC_ALL
# We cannot use Linux's asm/signal.h to define signal numbers, because
# it isn't sufficiently namespace-clean. Instead, this test checks
# that our signal numbers match the kernel's. This script expects
# "$@" to be $(CC) $(CPPFLAGS) as set by glibc's Makefiles, and $AWK
# to be set in the environment.
# Before doing anything else, fail if the compiler doesn't work.
"$@" -E -xc -dM - < /dev/null > /dev/null
tmpG=`mktemp -t signums_glibc.XXXXXXXXX`
tmpK=`mktemp -t signums_kernel.XXXXXXXXX`
trap "rm -f '$tmpG' '$tmpK'" 0
# Filter out constants that aren't signal numbers.
# If SIGPOLL is defined as SIGIO, swap it around so SIGIO is defined as
# SIGPOLL. Similarly for SIGABRT and SIGIOT.
# Discard obsolete signal numbers and unrelated constants:
# SIGCLD, SIGIOT, SIGSWI, SIGUNUSED.
# SIGSTKSZ, SIGRTMIN, SIGRTMAX.
# Then sort the list.
filter_defines ()
{
$AWK '
/^#define SIG[A-Z]+ ([0-9]+|SIG[A-Z0-9]+)$/ { signals[$2] = $3 }
END {
if ("SIGPOLL" in signals && "SIGIO" in signals &&
signals["SIGPOLL"] == "SIGIO") {
signals["SIGPOLL"] = signals["SIGIO"]
signals["SIGIO"] = "SIGPOLL"
}
if ("SIGABRT" in signals && "SIGIOT" in signals &&
signals["SIGABRT"] == "SIGIOT") {
signals["SIGABRT"] = signals["SIGIOT"]
signals["SIGIOT"] = "SIGABRT"
}
for (sig in signals) {
if (sig !~ /^SIG(CLD|IOT|RT(MIN|MAX)|STKSZ|SWI|UNUSED)$/) {
printf("#define %s %s\n", sig, signals[sig])
}
}
}' | sort
}
# $CC may contain command-line switches, so it should be word-split.
printf '%s' '#define _GNU_SOURCE 1
#include <signal.h>
' |
"$@" -E -xc -dM - |
filter_defines > "$tmpG"
printf '%s' '#define _GNU_SOURCE 1
#define __ASSEMBLER__ 1
#include <asm/signal.h>
' |
"$@" -E -xc -dM - |
filter_defines > "$tmpK"
if cmp -s "$tmpG" "$tmpK"; then
exit 0
else
diff -u "$tmpG" "$tmpK"
exit 1
fi