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- /* -*- mode:c; c-file-style:"k&r"; c-basic-offset: 4; tab-width:4; indent-tabs-mode:nil; mode:auto-fill; fill-column:78; -*- */
- /* vim: set ts=4 sw=4 et tw=78 fo=cqt wm=0: */
- #ifndef _SHIM_SIGNAL_H_
- #define _SHIM_SIGNAL_H_
- #include <shim_types.h>
- #include <shim_defs.h>
- #include <shim_thread.h>
- struct shim_signal_handle {
- /* sigaction */
- struct __kernel_sigaction * action;
- };
- # define BITS_PER_WORD sizeof(unsigned long)
- /* The standard def of this macro is dumb */
- #undef _SIGSET_NWORDS
- # define _SIGSET_NWORDS (NUM_SIGS / BITS_PER_WORD)
- /* Return a mask that includes the bit for SIG only. */
- # define __sigmask(sig) \
- (((unsigned long int) 1) << (((sig) - 1) % (8 * sizeof (unsigned long int))))
- /* Return the word index for SIG. */
- # define __sigword(sig) (((sig) - 1) / (8 * sizeof (unsigned long int)))
- /* Clear all signals from SET. */
- # define __sigemptyset(set) \
- (__extension__ ({ int __cnt = _SIGSET_NWORDS; \
- __sigset_t *__set = (set); \
- while (--__cnt >= 0) __set->__val[__cnt] = 0; \
- 0; }))
- /* Set all signals in SET. */
- # define __sigfillset(set) \
- (__extension__ ({ int __cnt = _SIGSET_NWORDS; \
- __sigset_t *__set = (set); \
- while (--__cnt >= 0) __set->__val[__cnt] = ~0UL; \
- 0; }))
- # define __sigisemptyset(set) \
- (__extension__ ({ int __cnt = _SIGSET_NWORDS; \
- const __sigset_t *__set = (set); \
- int __ret = __set->__val[--__cnt]; \
- while (!__ret && --__cnt >= 0) \
- __ret = __set->__val[__cnt]; \
- __ret == 0; }))
- # define __sigandset(dest, left, right) \
- (__extension__ ({ int __cnt = _SIGSET_NWORDS; \
- __sigset_t *__dest = (dest); \
- const __sigset_t *__left = (left); \
- const __sigset_t *__right = (right); \
- while (--__cnt >= 0) \
- __dest->__val[__cnt] = (__left->__val[__cnt] \
- & __right->__val[__cnt]); \
- 0; }))
- # define __sigorset(dest, left, right) \
- (__extension__ ({ int __cnt = _SIGSET_NWORDS; \
- __sigset_t *__dest = (dest); \
- const __sigset_t *__left = (left); \
- const __sigset_t *__right = (right); \
- while (--__cnt >= 0) \
- __dest->__val[__cnt] = (__left->__val[__cnt] \
- | __right->__val[__cnt]); \
- 0; }))
- # define __signotset(dest, left, right) \
- (__extension__ ({ int __cnt = _SIGSET_NWORDS; \
- __sigset_t *__dest = (dest); \
- const __sigset_t *__left = (left); \
- const __sigset_t *__right = (right); \
- while (--__cnt >= 0) \
- __dest->__val[__cnt] = (__left->__val[__cnt] \
- & ~__right->__val[__cnt]); \
- 0; }))
- # define __SIGSETFN(NAME, BODY, CONST) \
- static inline int \
- NAME (CONST __sigset_t *__set, int __sig) \
- { \
- unsigned long int __mask = __sigmask (__sig); \
- unsigned long int __word = __sigword (__sig); \
- return BODY; \
- }
- __SIGSETFN (shim_sigismember, (__set->__val[__word] & __mask) ? 1 : 0, __const)
- __SIGSETFN (shim_sigaddset, ((__set->__val[__word] |= __mask), 0), )
- __SIGSETFN (shim_sigdelset, ((__set->__val[__word] &= ~__mask), 0), )
- #define __sigismember shim_sigismember
- #define __sigaddset shim_sigaddset
- #define __sigdelset shim_sigdelset
- /* NB: Check shim_signal.c if this changes. Some memset(0) elision*/
- struct shim_signal {
- siginfo_t info;
- bool context_stored;
- ucontext_t context;
- PAL_CONTEXT * pal_context;
- };
- #define MAX_SIGNAL_LOG 32
- struct shim_signal_log {
- struct atomic_int head, tail;
- struct shim_signal * logs[MAX_SIGNAL_LOG];
- };
- extern const char * const siglist[NUM_KNOWN_SIGS + 1];
- static_inline const char * signal_name (int sig)
- {
- if (sig <= NUM_KNOWN_SIGS)
- return siglist[sig];
- if (sig >= NUM_SIGS)
- return "BAD SIGNAL";
- char * str = __alloca(6);
- str[0] = 'S';
- str[1] = 'I';
- str[2] = 'G';
- str[3] = '0' + sig / 10;
- str[4] = '0' + sig % 10;
- str[5] = 0;
- return str;
- }
- struct shim_thread;
- int init_signal (void);
- void __store_context (shim_tcb_t * tcb, PAL_CONTEXT * pal_context,
- struct shim_signal * signal);
- void append_signal (struct shim_thread * thread, int sig, siginfo_t * info,
- bool wakeup);
- void deliver_signal (siginfo_t * info, PAL_CONTEXT * context);
- __sigset_t * get_sig_mask (struct shim_thread * thread);
- __sigset_t * set_sig_mask (struct shim_thread * thread,
- const __sigset_t * new_set);
- int do_kill_thread (IDTYPE sender, IDTYPE tgid, IDTYPE tid, int sig,
- bool use_ipc);
- int do_kill_proc (IDTYPE sender, IDTYPE tgid, int sig, bool use_ipc);
- int do_kill_pgroup (IDTYPE sender, IDTYPE pgid, int sig, bool use_ipc);
- int broadcast_signal (IDTYPE sender, int sig);
- int kill_all_threads (struct shim_thread * cur, IDTYPE sender, int sig);
- #endif /* _SHIM_SIGNAL_H_ */
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