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8663daeac7
I believe we can and *should* drop this parisc-specific typedef for __sighandler_t when compiling a 64-bit kernel. The reasons: 1. We don't have a 64-bit userspace yet, so nothing (on userspace side) can break. 2. Inside the Linux kernel, this is only used in kernel/signal.c, in function kernel_sigaction() where the signal handler is compared against SIG_IGN. SIG_IGN is defined as (__sighandler_t)1), so only the pointers are compared. 3. Even when a 64-bit userspace gets added at some point, I think __sighandler_t should be defined what it is: a function pointer struct. I compiled kernel/signal.c with and without the patch, and the produced code is identical in both cases. Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Peter Collingbourne <pcc@google.com> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Reviewed-by: Peter Collingbourne <pcc@google.com> Link: https://linux-review.googlesource.com/id/I21c43f21b264f339e3aa395626af838646f62d97 Link: https://lkml.kernel.org/r/a75b8eb7bb9eac1cf73fb119eb53e5892d6e9656.1605235762.git.pcc@google.com Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _UAPI_ASM_PARISC_SIGNAL_H
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#define _UAPI_ASM_PARISC_SIGNAL_H
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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 SIGSTKFLT 7
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#define SIGFPE 8
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#define SIGKILL 9
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#define SIGBUS 10
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#define SIGSEGV 11
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#define SIGXCPU 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 SIGUSR1 16
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#define SIGUSR2 17
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#define SIGCHLD 18
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#define SIGPWR 19
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#define SIGVTALRM 20
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#define SIGPROF 21
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#define SIGIO 22
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#define SIGPOLL SIGIO
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#define SIGWINCH 23
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#define SIGSTOP 24
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#define SIGTSTP 25
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#define SIGCONT 26
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#define SIGTTIN 27
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#define SIGTTOU 28
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#define SIGURG 29
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#define SIGXFSZ 30
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#define SIGUNUSED 31
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#define SIGSYS 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_ONSTACK 0x00000001
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#define SA_RESETHAND 0x00000004
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#define SA_NOCLDSTOP 0x00000008
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#define SA_SIGINFO 0x00000010
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#define SA_NODEFER 0x00000020
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#define SA_RESTART 0x00000040
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#define SA_NOCLDWAIT 0x00000080
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#define SA_NOMASK SA_NODEFER
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#define SA_ONESHOT SA_RESETHAND
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#define MINSIGSTKSZ 2048
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#define SIGSTKSZ 8192
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#define SIG_BLOCK 0 /* for blocking signals */
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#define SIG_UNBLOCK 1 /* for unblocking signals */
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#define SIG_SETMASK 2 /* for setting the signal mask */
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#define SIG_DFL ((__sighandler_t)0) /* default signal handling */
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#define SIG_IGN ((__sighandler_t)1) /* ignore signal */
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#define SIG_ERR ((__sighandler_t)-1) /* error return from signal */
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# ifndef __ASSEMBLY__
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# include <linux/types.h>
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/* Avoid too many header ordering problems. */
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struct siginfo;
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/* Type of a signal handler. */
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typedef void __signalfn_t(int);
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typedef __signalfn_t __user *__sighandler_t;
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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 /* !__ASSEMBLY */
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#endif /* _UAPI_ASM_PARISC_SIGNAL_H */
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