tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1995, 96, 97, 98, 99, 2003 by Ralf Baechle
7 * Copyright (C) 1999 Silicon Graphics, Inc.
8 */
9#ifndef _ASM_SIGNAL_H
10#define _ASM_SIGNAL_H
11
12#include <linux/config.h>
13#include <linux/types.h>
14
15#define _NSIG 128
16#define _NSIG_BPW (sizeof(unsigned long) * 8)
17#define _NSIG_WORDS (_NSIG / _NSIG_BPW)
18
19typedef struct {
20 unsigned long sig[_NSIG_WORDS];
21} sigset_t;
22
23typedef unsigned long old_sigset_t; /* at least 32 bits */
24
25#define SIGHUP 1 /* Hangup (POSIX). */
26#define SIGINT 2 /* Interrupt (ANSI). */
27#define SIGQUIT 3 /* Quit (POSIX). */
28#define SIGILL 4 /* Illegal instruction (ANSI). */
29#define SIGTRAP 5 /* Trace trap (POSIX). */
30#define SIGIOT 6 /* IOT trap (4.2 BSD). */
31#define SIGABRT SIGIOT /* Abort (ANSI). */
32#define SIGEMT 7
33#define SIGFPE 8 /* Floating-point exception (ANSI). */
34#define SIGKILL 9 /* Kill, unblockable (POSIX). */
35#define SIGBUS 10 /* BUS error (4.2 BSD). */
36#define SIGSEGV 11 /* Segmentation violation (ANSI). */
37#define SIGSYS 12
38#define SIGPIPE 13 /* Broken pipe (POSIX). */
39#define SIGALRM 14 /* Alarm clock (POSIX). */
40#define SIGTERM 15 /* Termination (ANSI). */
41#define SIGUSR1 16 /* User-defined signal 1 (POSIX). */
42#define SIGUSR2 17 /* User-defined signal 2 (POSIX). */
43#define SIGCHLD 18 /* Child status has changed (POSIX). */
44#define SIGCLD SIGCHLD /* Same as SIGCHLD (System V). */
45#define SIGPWR 19 /* Power failure restart (System V). */
46#define SIGWINCH 20 /* Window size change (4.3 BSD, Sun). */
47#define SIGURG 21 /* Urgent condition on socket (4.2 BSD). */
48#define SIGIO 22 /* I/O now possible (4.2 BSD). */
49#define SIGPOLL SIGIO /* Pollable event occurred (System V). */
50#define SIGSTOP 23 /* Stop, unblockable (POSIX). */
51#define SIGTSTP 24 /* Keyboard stop (POSIX). */
52#define SIGCONT 25 /* Continue (POSIX). */
53#define SIGTTIN 26 /* Background read from tty (POSIX). */
54#define SIGTTOU 27 /* Background write to tty (POSIX). */
55#define SIGVTALRM 28 /* Virtual alarm clock (4.2 BSD). */
56#define SIGPROF 29 /* Profiling alarm clock (4.2 BSD). */
57#define SIGXCPU 30 /* CPU limit exceeded (4.2 BSD). */
58#define SIGXFSZ 31 /* File size limit exceeded (4.2 BSD). */
59
60/* These should not be considered constants from userland. */
61#define SIGRTMIN 32
62#define SIGRTMAX _NSIG
63
64/*
65 * SA_FLAGS values:
66 *
67 * SA_ONSTACK indicates that a registered stack_t will be used.
68 * SA_INTERRUPT is a no-op, but left due to historical reasons. Use the
69 * SA_RESTART flag to get restarting signals (which were the default long ago)
70 * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
71 * SA_RESETHAND clears the handler when the signal is delivered.
72 * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
73 * SA_NODEFER prevents the current signal from being masked in the handler.
74 *
75 * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
76 * Unix names RESETHAND and NODEFER respectively.
77 */
78#define SA_ONSTACK 0x08000000
79#define SA_RESETHAND 0x80000000
80#define SA_RESTART 0x10000000
81#define SA_SIGINFO 0x00000008
82#define SA_NODEFER 0x40000000
83#define SA_NOCLDWAIT 0x00010000
84#define SA_NOCLDSTOP 0x00000001
85
86#define SA_NOMASK SA_NODEFER
87#define SA_ONESHOT SA_RESETHAND
88#define SA_INTERRUPT 0x20000000 /* dummy -- ignored */
89
90#define SA_RESTORER 0x04000000 /* Only for o32 */
91
92/*
93 * sigaltstack controls
94 */
95#define SS_ONSTACK 1
96#define SS_DISABLE 2
97
98#define MINSIGSTKSZ 2048
99#define SIGSTKSZ 8192
100
101#define SIG_BLOCK 1 /* for blocking signals */
102#define SIG_UNBLOCK 2 /* for unblocking signals */
103#define SIG_SETMASK 3 /* for setting the signal mask */
104#define SIG_SETMASK32 256 /* Goodie from SGI for BSD compatibility:
105 set only the low 32 bit of the sigset. */
106#include <asm-generic/signal.h>
107
108struct sigaction {
109 unsigned int sa_flags;
110 __sighandler_t sa_handler;
111 sigset_t sa_mask;
112};
113
114struct k_sigaction {
115 struct sigaction sa;
116#ifdef CONFIG_BINFMT_IRIX
117 void (*sa_restorer)(void);
118#endif
119};
120
121/* IRIX compatible stack_t */
122typedef struct sigaltstack {
123 void *ss_sp;
124 size_t ss_size;
125 int ss_flags;
126} stack_t;
127
128#ifdef __KERNEL__
129#include <asm/sigcontext.h>
130
131/*
132 * The following break codes are or were in use for specific purposes in
133 * other MIPS operating systems. Linux/MIPS doesn't use all of them. The
134 * unused ones are here as placeholders; we might encounter them in
135 * non-Linux/MIPS object files or make use of them in the future.
136 */
137#define BRK_USERBP 0 /* User bp (used by debuggers) */
138#define BRK_KERNELBP 1 /* Break in the kernel */
139#define BRK_ABORT 2 /* Sometimes used by abort(3) to SIGIOT */
140#define BRK_BD_TAKEN 3 /* For bd slot emulation - not implemented */
141#define BRK_BD_NOTTAKEN 4 /* For bd slot emulation - not implemented */
142#define BRK_SSTEPBP 5 /* User bp (used by debuggers) */
143#define BRK_OVERFLOW 6 /* Overflow check */
144#define BRK_DIVZERO 7 /* Divide by zero check */
145#define BRK_RANGE 8 /* Range error check */
146#define BRK_STACKOVERFLOW 9 /* For Ada stackchecking */
147#define BRK_NORLD 10 /* No rld found - not used by Linux/MIPS */
148#define _BRK_THREADBP 11 /* For threads, user bp (used by debuggers) */
149#define BRK_MULOVF 1023 /* Multiply overflow */
150#define BRK_BUG 512 /* Used by BUG() */
151
152#define ptrace_signal_deliver(regs, cookie) do { } while (0)
153
154#endif /* __KERNEL__ */
155
156#endif /* _ASM_SIGNAL_H */