54d46ea993
Pull signal handling cleanups from Al Viro: "sigaltstack infrastructure + conversion for x86, alpha and um, COMPAT_SYSCALL_DEFINE infrastructure. Note that there are several conflicts between "unify SS_ONSTACK/SS_DISABLE definitions" and UAPI patches in mainline; resolution is trivial - just remove definitions of SS_ONSTACK and SS_DISABLED from arch/*/uapi/asm/signal.h; they are all identical and include/uapi/linux/signal.h contains the unified variant." Fixed up conflicts as per Al. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: alpha: switch to generic sigaltstack new helpers: __save_altstack/__compat_save_altstack, switch x86 and um to those generic compat_sys_sigaltstack() introduce generic sys_sigaltstack(), switch x86 and um to it new helper: compat_user_stack_pointer() new helper: restore_altstack() unify SS_ONSTACK/SS_DISABLE definitions new helper: current_user_stack_pointer() missing user_stack_pointer() instances Bury the conditionals from kernel_thread/kernel_execve series COMPAT_SYSCALL_DEFINE: infrastructure
129 lines
3 KiB
C
129 lines
3 KiB
C
#ifndef _UAPI_ASMAXP_SIGNAL_H
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#define _UAPI_ASMAXP_SIGNAL_H
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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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#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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/*
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* Linux/AXP has different signal numbers that Linux/i386: I'm trying
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* to make it OSF/1 binary compatible, at least for normal binaries.
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*/
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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 SIGEMT 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 SIGSYS 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 SIGURG 16
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#define SIGSTOP 17
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#define SIGTSTP 18
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#define SIGCONT 19
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#define SIGCHLD 20
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#define SIGTTIN 21
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#define SIGTTOU 22
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#define SIGIO 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 SIGINFO 29
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#define SIGUSR1 30
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#define SIGUSR2 31
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#define SIGPOLL SIGIO
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#define SIGPWR SIGINFO
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#define SIGIOT SIGABRT
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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_RESTART 0x00000002
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#define SA_NOCLDSTOP 0x00000004
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#define SA_NODEFER 0x00000008
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#define SA_RESETHAND 0x00000010
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#define SA_NOCLDWAIT 0x00000020
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#define SA_SIGINFO 0x00000040
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#define SA_ONESHOT SA_RESETHAND
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#define SA_NOMASK SA_NODEFER
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#define MINSIGSTKSZ 4096
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#define SIGSTKSZ 16384
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#define SIG_BLOCK 1 /* for blocking signals */
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#define SIG_UNBLOCK 2 /* for unblocking signals */
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#define SIG_SETMASK 3 /* for setting the signal mask */
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#include <asm-generic/signal-defs.h>
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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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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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sigset_t sa_mask;
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int sa_flags;
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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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/* sigstack(2) is deprecated, and will be withdrawn in a future version
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of the X/Open CAE Specification. Use sigaltstack instead. It is only
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implemented here for OSF/1 compatibility. */
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struct sigstack {
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void __user *ss_sp;
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int ss_onstack;
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};
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#endif /* _UAPI_ASMAXP_SIGNAL_H */
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