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272 lines
6.3 KiB
272 lines
6.3 KiB
#ifndef _LINUX_SIGNAL_H
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#define _LINUX_SIGNAL_H
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#include <asm/signal.h>
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#include <asm/siginfo.h>
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#ifdef __KERNEL__
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#include <linux/list.h>
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#include <linux/spinlock.h>
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/*
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* These values of sa_flags are used only by the kernel as part of the
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* irq handling routines.
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*
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* SA_INTERRUPT is also used by the irq handling routines.
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* SA_SHIRQ is for shared interrupt support on PCI and EISA.
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* SA_PROBEIRQ is set by callers when they expect sharing mismatches to occur
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*/
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#define SA_SAMPLE_RANDOM SA_RESTART
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#define SA_SHIRQ 0x04000000
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#define SA_PROBEIRQ 0x08000000
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/*
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* As above, these correspond to the IORESOURCE_IRQ_* defines in
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* linux/ioport.h to select the interrupt line behaviour. When
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* requesting an interrupt without specifying a SA_TRIGGER, the
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* setting should be assumed to be "as already configured", which
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* may be as per machine or firmware initialisation.
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*/
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#define SA_TRIGGER_LOW 0x00000008
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#define SA_TRIGGER_HIGH 0x00000004
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#define SA_TRIGGER_FALLING 0x00000002
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#define SA_TRIGGER_RISING 0x00000001
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#define SA_TRIGGER_MASK (SA_TRIGGER_HIGH|SA_TRIGGER_LOW|\
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SA_TRIGGER_RISING|SA_TRIGGER_FALLING)
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/*
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* Real Time signals may be queued.
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*/
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struct sigqueue {
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struct list_head list;
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int flags;
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siginfo_t info;
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struct user_struct *user;
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};
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/* flags values. */
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#define SIGQUEUE_PREALLOC 1
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struct sigpending {
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struct list_head list;
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sigset_t signal;
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};
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/*
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* Define some primitives to manipulate sigset_t.
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*/
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#ifndef __HAVE_ARCH_SIG_BITOPS
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#include <linux/bitops.h>
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/* We don't use <linux/bitops.h> for these because there is no need to
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be atomic. */
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static inline void sigaddset(sigset_t *set, int _sig)
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{
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unsigned long sig = _sig - 1;
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if (_NSIG_WORDS == 1)
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set->sig[0] |= 1UL << sig;
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else
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set->sig[sig / _NSIG_BPW] |= 1UL << (sig % _NSIG_BPW);
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}
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static inline void sigdelset(sigset_t *set, int _sig)
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{
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unsigned long sig = _sig - 1;
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if (_NSIG_WORDS == 1)
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set->sig[0] &= ~(1UL << sig);
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else
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set->sig[sig / _NSIG_BPW] &= ~(1UL << (sig % _NSIG_BPW));
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}
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static inline int sigismember(sigset_t *set, int _sig)
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{
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unsigned long sig = _sig - 1;
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if (_NSIG_WORDS == 1)
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return 1 & (set->sig[0] >> sig);
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else
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return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
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}
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static inline int sigfindinword(unsigned long word)
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{
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return ffz(~word);
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}
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#endif /* __HAVE_ARCH_SIG_BITOPS */
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static inline int sigisemptyset(sigset_t *set)
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{
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extern void _NSIG_WORDS_is_unsupported_size(void);
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switch (_NSIG_WORDS) {
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case 4:
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return (set->sig[3] | set->sig[2] |
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set->sig[1] | set->sig[0]) == 0;
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case 2:
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return (set->sig[1] | set->sig[0]) == 0;
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case 1:
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return set->sig[0] == 0;
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default:
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_NSIG_WORDS_is_unsupported_size();
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return 0;
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}
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}
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#define sigmask(sig) (1UL << ((sig) - 1))
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#ifndef __HAVE_ARCH_SIG_SETOPS
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#include <linux/string.h>
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#define _SIG_SET_BINOP(name, op) \
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static inline void name(sigset_t *r, const sigset_t *a, const sigset_t *b) \
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{ \
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extern void _NSIG_WORDS_is_unsupported_size(void); \
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unsigned long a0, a1, a2, a3, b0, b1, b2, b3; \
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\
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switch (_NSIG_WORDS) { \
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case 4: \
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a3 = a->sig[3]; a2 = a->sig[2]; \
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b3 = b->sig[3]; b2 = b->sig[2]; \
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r->sig[3] = op(a3, b3); \
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r->sig[2] = op(a2, b2); \
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case 2: \
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a1 = a->sig[1]; b1 = b->sig[1]; \
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r->sig[1] = op(a1, b1); \
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case 1: \
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a0 = a->sig[0]; b0 = b->sig[0]; \
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r->sig[0] = op(a0, b0); \
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break; \
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default: \
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_NSIG_WORDS_is_unsupported_size(); \
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} \
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}
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#define _sig_or(x,y) ((x) | (y))
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_SIG_SET_BINOP(sigorsets, _sig_or)
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#define _sig_and(x,y) ((x) & (y))
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_SIG_SET_BINOP(sigandsets, _sig_and)
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#define _sig_nand(x,y) ((x) & ~(y))
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_SIG_SET_BINOP(signandsets, _sig_nand)
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#undef _SIG_SET_BINOP
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#undef _sig_or
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#undef _sig_and
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#undef _sig_nand
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#define _SIG_SET_OP(name, op) \
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static inline void name(sigset_t *set) \
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{ \
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extern void _NSIG_WORDS_is_unsupported_size(void); \
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\
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switch (_NSIG_WORDS) { \
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case 4: set->sig[3] = op(set->sig[3]); \
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set->sig[2] = op(set->sig[2]); \
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case 2: set->sig[1] = op(set->sig[1]); \
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case 1: set->sig[0] = op(set->sig[0]); \
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break; \
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default: \
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_NSIG_WORDS_is_unsupported_size(); \
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} \
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}
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#define _sig_not(x) (~(x))
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_SIG_SET_OP(signotset, _sig_not)
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#undef _SIG_SET_OP
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#undef _sig_not
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static inline void sigemptyset(sigset_t *set)
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{
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switch (_NSIG_WORDS) {
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default:
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memset(set, 0, sizeof(sigset_t));
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break;
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case 2: set->sig[1] = 0;
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case 1: set->sig[0] = 0;
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break;
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}
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}
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static inline void sigfillset(sigset_t *set)
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{
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switch (_NSIG_WORDS) {
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default:
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memset(set, -1, sizeof(sigset_t));
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break;
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case 2: set->sig[1] = -1;
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case 1: set->sig[0] = -1;
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break;
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}
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}
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/* Some extensions for manipulating the low 32 signals in particular. */
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static inline void sigaddsetmask(sigset_t *set, unsigned long mask)
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{
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set->sig[0] |= mask;
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}
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static inline void sigdelsetmask(sigset_t *set, unsigned long mask)
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{
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set->sig[0] &= ~mask;
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}
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static inline int sigtestsetmask(sigset_t *set, unsigned long mask)
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{
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return (set->sig[0] & mask) != 0;
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}
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static inline void siginitset(sigset_t *set, unsigned long mask)
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{
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set->sig[0] = mask;
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switch (_NSIG_WORDS) {
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default:
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memset(&set->sig[1], 0, sizeof(long)*(_NSIG_WORDS-1));
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break;
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case 2: set->sig[1] = 0;
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case 1: ;
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}
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}
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static inline void siginitsetinv(sigset_t *set, unsigned long mask)
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{
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set->sig[0] = ~mask;
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switch (_NSIG_WORDS) {
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default:
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memset(&set->sig[1], -1, sizeof(long)*(_NSIG_WORDS-1));
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break;
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case 2: set->sig[1] = -1;
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case 1: ;
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}
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}
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#endif /* __HAVE_ARCH_SIG_SETOPS */
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static inline void init_sigpending(struct sigpending *sig)
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{
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sigemptyset(&sig->signal);
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INIT_LIST_HEAD(&sig->list);
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}
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extern void flush_sigqueue(struct sigpending *queue);
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/* Test if 'sig' is valid signal. Use this instead of testing _NSIG directly */
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static inline int valid_signal(unsigned long sig)
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{
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return sig <= _NSIG ? 1 : 0;
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}
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extern int group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p);
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extern int __group_send_sig_info(int, struct siginfo *, struct task_struct *);
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extern long do_sigpending(void __user *, unsigned long);
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extern int sigprocmask(int, sigset_t *, sigset_t *);
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struct pt_regs;
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extern int get_signal_to_deliver(siginfo_t *info, struct k_sigaction *return_ka, struct pt_regs *regs, void *cookie);
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#endif /* __KERNEL__ */
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#endif /* _LINUX_SIGNAL_H */
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