forked from Minki/linux
fae7649121
The struct sigaction for user space in arch/s390/include/uapi/asm/signal.h
is ill defined. The kernel uses two structures 'struct sigaction' and
'struct old_sigaction', the correlation in the kernel for both 31 and
64 bit is as follows
sys_sigaction -> struct old_sigaction
sys_rt_sigaction -> struct sigaction
The correlation of the (single) uapi definition for 'struct sigaction'
under '#ifndef __KERNEL__':
31-bit: sys_sigaction -> uapi struct sigaction
31-bit: sys_rt_sigaction -> no structure available
64-bit: sys_sigaction -> no structure available
64-bit: sys_rt_sigaction -> uapi struct sigaction
This is quite confusing. To make it a bit less confusing make the
uapi definition of 'struct sigaction' usable for sys_rt_sigaction for
both 31-bit and 64-bit.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
140 lines
3.8 KiB
C
140 lines
3.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* S390 version
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*
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* Derived from "include/asm-i386/signal.h"
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*/
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#ifndef _UAPI_ASMS390_SIGNAL_H
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#define _UAPI_ASMS390_SIGNAL_H
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#include <linux/types.h>
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#include <linux/time.h>
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/* Avoid too many header ordering problems. */
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struct siginfo;
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struct pt_regs;
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#ifndef __KERNEL__
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/* Here we must cater to libcs that poke about in kernel headers. */
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#define NSIG 32
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typedef unsigned long sigset_t;
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#endif /* __KERNEL__ */
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#define SIGHUP 1
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#define SIGINT 2
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#define SIGQUIT 3
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#define SIGILL 4
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#define SIGTRAP 5
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#define SIGABRT 6
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#define SIGIOT 6
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#define SIGBUS 7
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#define SIGFPE 8
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#define SIGKILL 9
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#define SIGUSR1 10
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#define SIGSEGV 11
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#define SIGUSR2 12
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#define SIGPIPE 13
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#define SIGALRM 14
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#define SIGTERM 15
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#define SIGSTKFLT 16
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#define SIGCHLD 17
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#define SIGCONT 18
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#define SIGSTOP 19
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#define SIGTSTP 20
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#define SIGTTIN 21
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#define SIGTTOU 22
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#define SIGURG 23
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#define SIGXCPU 24
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#define SIGXFSZ 25
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#define SIGVTALRM 26
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#define SIGPROF 27
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#define SIGWINCH 28
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#define SIGIO 29
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#define SIGPOLL SIGIO
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/*
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#define SIGLOST 29
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*/
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#define SIGPWR 30
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#define SIGSYS 31
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#define SIGUNUSED 31
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/* These should not be considered constants from userland. */
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#define SIGRTMIN 32
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#define SIGRTMAX _NSIG
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/*
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* SA_FLAGS values:
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*
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* SA_ONSTACK indicates that a registered stack_t will be used.
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* SA_RESTART flag to get restarting signals (which were the default long ago)
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* SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
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* SA_RESETHAND clears the handler when the signal is delivered.
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* SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
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* SA_NODEFER prevents the current signal from being masked in the handler.
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*
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* SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
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* Unix names RESETHAND and NODEFER respectively.
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*/
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#define SA_NOCLDSTOP 0x00000001
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#define SA_NOCLDWAIT 0x00000002
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#define SA_SIGINFO 0x00000004
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#define SA_ONSTACK 0x08000000
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#define SA_RESTART 0x10000000
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#define SA_NODEFER 0x40000000
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#define SA_RESETHAND 0x80000000
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#define SA_NOMASK SA_NODEFER
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#define SA_ONESHOT SA_RESETHAND
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#define SA_RESTORER 0x04000000
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#define MINSIGSTKSZ 2048
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#define SIGSTKSZ 8192
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#include <asm-generic/signal-defs.h>
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#ifndef __KERNEL__
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/*
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* There are two system calls in regard to sigaction, sys_rt_sigaction
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* and sys_sigaction. Internally the kernel uses the struct old_sigaction
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* for the older sys_sigaction system call, and the kernel version of the
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* struct sigaction for the newer sys_rt_sigaction.
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*
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* The uapi definition for struct sigaction has made a strange distinction
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* between 31-bit and 64-bit in the past. For 64-bit the uapi structure
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* looks like the kernel struct sigaction, but for 31-bit it used to
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* look like the kernel struct old_sigaction. That practically made the
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* structure unusable for either system call. To get around this problem
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* the glibc always had its own definitions for the sigaction structures.
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*
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* The current struct sigaction uapi definition below is suitable for the
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* sys_rt_sigaction system call only.
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*/
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struct sigaction {
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union {
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__sighandler_t _sa_handler;
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void (*_sa_sigaction)(int, struct siginfo *, void *);
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} _u;
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unsigned long sa_flags;
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void (*sa_restorer)(void);
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sigset_t sa_mask;
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};
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#define sa_handler _u._sa_handler
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#define sa_sigaction _u._sa_sigaction
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#endif /* __KERNEL__ */
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typedef struct sigaltstack {
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void __user *ss_sp;
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int ss_flags;
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size_t ss_size;
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} stack_t;
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#endif /* _UAPI_ASMS390_SIGNAL_H */
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