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Linux/arch/s390/include/uapi/asm/signal.h

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  1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
  2 /*
  3  *  S390 version
  4  *
  5  *  Derived from "include/asm-i386/signal.h"
  6  */
  7 
  8 #ifndef _UAPI_ASMS390_SIGNAL_H
  9 #define _UAPI_ASMS390_SIGNAL_H
 10 
 11 #include <linux/types.h>
 12 #include <linux/time.h>
 13 
 14 /* Avoid too many header ordering problems.  */
 15 struct siginfo;
 16 struct pt_regs;
 17 
 18 #ifndef __KERNEL__
 19 /* Here we must cater to libcs that poke about in kernel headers.  */
 20 
 21 #define NSIG            32
 22 typedef unsigned long sigset_t;
 23 
 24 #endif /* __KERNEL__ */
 25 
 26 #define SIGHUP           1
 27 #define SIGINT           2
 28 #define SIGQUIT          3
 29 #define SIGILL           4
 30 #define SIGTRAP          5
 31 #define SIGABRT          6
 32 #define SIGIOT           6
 33 #define SIGBUS           7
 34 #define SIGFPE           8
 35 #define SIGKILL          9
 36 #define SIGUSR1         10
 37 #define SIGSEGV         11
 38 #define SIGUSR2         12
 39 #define SIGPIPE         13
 40 #define SIGALRM         14
 41 #define SIGTERM         15
 42 #define SIGSTKFLT       16
 43 #define SIGCHLD         17
 44 #define SIGCONT         18
 45 #define SIGSTOP         19
 46 #define SIGTSTP         20
 47 #define SIGTTIN         21
 48 #define SIGTTOU         22
 49 #define SIGURG          23
 50 #define SIGXCPU         24
 51 #define SIGXFSZ         25
 52 #define SIGVTALRM       26
 53 #define SIGPROF         27
 54 #define SIGWINCH        28
 55 #define SIGIO           29
 56 #define SIGPOLL         SIGIO
 57 /*
 58 #define SIGLOST         29
 59 */
 60 #define SIGPWR          30
 61 #define SIGSYS          31
 62 #define SIGUNUSED       31
 63 
 64 /* These should not be considered constants from userland.  */
 65 #define SIGRTMIN        32
 66 #define SIGRTMAX        _NSIG
 67 
 68 /*
 69  * SA_FLAGS values:
 70  *
 71  * SA_ONSTACK indicates that a registered stack_t will be used.
 72  * SA_RESTART flag to get restarting signals (which were the default long ago)
 73  * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
 74  * SA_RESETHAND clears the handler when the signal is delivered.
 75  * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
 76  * SA_NODEFER prevents the current signal from being masked in the handler.
 77  *
 78  * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
 79  * Unix names RESETHAND and NODEFER respectively.
 80  */
 81 #define SA_NOCLDSTOP    0x00000001
 82 #define SA_NOCLDWAIT    0x00000002
 83 #define SA_SIGINFO      0x00000004
 84 #define SA_ONSTACK      0x08000000
 85 #define SA_RESTART      0x10000000
 86 #define SA_NODEFER      0x40000000
 87 #define SA_RESETHAND    0x80000000
 88 
 89 #define SA_NOMASK       SA_NODEFER
 90 #define SA_ONESHOT      SA_RESETHAND
 91 
 92 #define SA_RESTORER     0x04000000
 93 
 94 #define MINSIGSTKSZ     2048
 95 #define SIGSTKSZ        8192
 96 
 97 #include <asm-generic/signal-defs.h>
 98 
 99 #ifndef __KERNEL__
100 
101 /*
102  * There are two system calls in regard to sigaction, sys_rt_sigaction
103  * and sys_sigaction. Internally the kernel uses the struct old_sigaction
104  * for the older sys_sigaction system call, and the kernel version of the
105  * struct sigaction for the newer sys_rt_sigaction.
106  *
107  * The uapi definition for struct sigaction has made a strange distinction
108  * between 31-bit and 64-bit in the past. For 64-bit the uapi structure
109  * looks like the kernel struct sigaction, but for 31-bit it used to
110  * look like the kernel struct old_sigaction. That practically made the
111  * structure unusable for either system call. To get around this problem
112  * the glibc always had its own definitions for the sigaction structures.
113  *
114  * The current struct sigaction uapi definition below is suitable for the
115  * sys_rt_sigaction system call only.
116  */
117 struct sigaction {
118         union {
119           __sighandler_t _sa_handler;
120           void (*_sa_sigaction)(int, struct siginfo *, void *);
121         } _u;
122         unsigned long sa_flags;
123         void (*sa_restorer)(void);
124         sigset_t sa_mask;
125 };
126 
127 #define sa_handler      _u._sa_handler
128 #define sa_sigaction    _u._sa_sigaction
129 
130 #endif /* __KERNEL__ */
131 
132 typedef struct sigaltstack {
133         void __user *ss_sp;
134         int ss_flags;
135         size_t ss_size;
136 } stack_t;
137 
138 
139 #endif /* _UAPI_ASMS390_SIGNAL_H */
140 

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