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authorRoland McGrath <roland@redhat.com>2007-05-09 02:33:37 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-09 12:30:49 -0700
commit55c0d1f83e481dd6c77f52f7dcfeb043b8b740fa (patch)
tree5d3240d565c158712345094362d40c3973483a7f /kernel/signal.c
parent84963048ca8093e0aa71ac90c2a5fe7af5f617c3 (diff)
Move sig_kernel_* et al macros to linux/signal.h
This patch moves the sig_kernel_* and related macros from kernel/signal.c to linux/signal.h, and cleans them up slightly. I need the sig_kernel_* macros for default signal behavior in the utrace code, and want to avoid duplication or overhead to share the knowledge. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/signal.c')
-rw-r--r--kernel/signal.c119
1 files changed, 0 insertions, 119 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index 1368e67c8482..4c8f49eadf7d 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -38,125 +38,6 @@
static struct kmem_cache *sigqueue_cachep;
-/*
- * In POSIX a signal is sent either to a specific thread (Linux task)
- * or to the process as a whole (Linux thread group). How the signal
- * is sent determines whether it's to one thread or the whole group,
- * which determines which signal mask(s) are involved in blocking it
- * from being delivered until later. When the signal is delivered,
- * either it's caught or ignored by a user handler or it has a default
- * effect that applies to the whole thread group (POSIX process).
- *
- * The possible effects an unblocked signal set to SIG_DFL can have are:
- * ignore - Nothing Happens
- * terminate - kill the process, i.e. all threads in the group,
- * similar to exit_group. The group leader (only) reports
- * WIFSIGNALED status to its parent.
- * coredump - write a core dump file describing all threads using
- * the same mm and then kill all those threads
- * stop - stop all the threads in the group, i.e. TASK_STOPPED state
- *
- * SIGKILL and SIGSTOP cannot be caught, blocked, or ignored.
- * Other signals when not blocked and set to SIG_DFL behaves as follows.
- * The job control signals also have other special effects.
- *
- * +--------------------+------------------+
- * | POSIX signal | default action |
- * +--------------------+------------------+
- * | SIGHUP | terminate |
- * | SIGINT | terminate |
- * | SIGQUIT | coredump |
- * | SIGILL | coredump |
- * | SIGTRAP | coredump |
- * | SIGABRT/SIGIOT | coredump |
- * | SIGBUS | coredump |
- * | SIGFPE | coredump |
- * | SIGKILL | terminate(+) |
- * | SIGUSR1 | terminate |
- * | SIGSEGV | coredump |
- * | SIGUSR2 | terminate |
- * | SIGPIPE | terminate |
- * | SIGALRM | terminate |
- * | SIGTERM | terminate |
- * | SIGCHLD | ignore |
- * | SIGCONT | ignore(*) |
- * | SIGSTOP | stop(*)(+) |
- * | SIGTSTP | stop(*) |
- * | SIGTTIN | stop(*) |
- * | SIGTTOU | stop(*) |
- * | SIGURG | ignore |
- * | SIGXCPU | coredump |
- * | SIGXFSZ | coredump |
- * | SIGVTALRM | terminate |
- * | SIGPROF | terminate |
- * | SIGPOLL/SIGIO | terminate |
- * | SIGSYS/SIGUNUSED | coredump |
- * | SIGSTKFLT | terminate |
- * | SIGWINCH | ignore |
- * | SIGPWR | terminate |
- * | SIGRTMIN-SIGRTMAX | terminate |
- * +--------------------+------------------+
- * | non-POSIX signal | default action |
- * +--------------------+------------------+
- * | SIGEMT | coredump |
- * +--------------------+------------------+
- *
- * (+) For SIGKILL and SIGSTOP the action is "always", not just "default".
- * (*) Special job control effects:
- * When SIGCONT is sent, it resumes the process (all threads in the group)
- * from TASK_STOPPED state and also clears any pending/queued stop signals
- * (any of those marked with "stop(*)"). This happens regardless of blocking,
- * catching, or ignoring SIGCONT. When any stop signal is sent, it clears
- * any pending/queued SIGCONT signals; this happens regardless of blocking,
- * catching, or ignored the stop signal, though (except for SIGSTOP) the
- * default action of stopping the process may happen later or never.
- */
-
-#ifdef SIGEMT
-#define M_SIGEMT M(SIGEMT)
-#else
-#define M_SIGEMT 0
-#endif
-
-#if SIGRTMIN > BITS_PER_LONG
-#define M(sig) (1ULL << ((sig)-1))
-#else
-#define M(sig) (1UL << ((sig)-1))
-#endif
-#define T(sig, mask) (M(sig) & (mask))
-
-#define SIG_KERNEL_ONLY_MASK (\
- M(SIGKILL) | M(SIGSTOP) )
-
-#define SIG_KERNEL_STOP_MASK (\
- M(SIGSTOP) | M(SIGTSTP) | M(SIGTTIN) | M(SIGTTOU) )
-
-#define SIG_KERNEL_COREDUMP_MASK (\
- M(SIGQUIT) | M(SIGILL) | M(SIGTRAP) | M(SIGABRT) | \
- M(SIGFPE) | M(SIGSEGV) | M(SIGBUS) | M(SIGSYS) | \
- M(SIGXCPU) | M(SIGXFSZ) | M_SIGEMT )
-
-#define SIG_KERNEL_IGNORE_MASK (\
- M(SIGCONT) | M(SIGCHLD) | M(SIGWINCH) | M(SIGURG) )
-
-#define sig_kernel_only(sig) \
- (((sig) < SIGRTMIN) && T(sig, SIG_KERNEL_ONLY_MASK))
-#define sig_kernel_coredump(sig) \
- (((sig) < SIGRTMIN) && T(sig, SIG_KERNEL_COREDUMP_MASK))
-#define sig_kernel_ignore(sig) \
- (((sig) < SIGRTMIN) && T(sig, SIG_KERNEL_IGNORE_MASK))
-#define sig_kernel_stop(sig) \
- (((sig) < SIGRTMIN) && T(sig, SIG_KERNEL_STOP_MASK))
-
-#define sig_needs_tasklist(sig) ((sig) == SIGCONT)
-
-#define sig_user_defined(t, signr) \
- (((t)->sighand->action[(signr)-1].sa.sa_handler != SIG_DFL) && \
- ((t)->sighand->action[(signr)-1].sa.sa_handler != SIG_IGN))
-
-#define sig_fatal(t, signr) \
- (!T(signr, SIG_KERNEL_IGNORE_MASK|SIG_KERNEL_STOP_MASK) && \
- (t)->sighand->action[(signr)-1].sa.sa_handler == SIG_DFL)
static int sig_ignored(struct task_struct *t, int sig)
{