diff options
Diffstat (limited to 'include/asm-generic/siginfo.h')
| -rw-r--r-- | include/asm-generic/siginfo.h | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/include/asm-generic/siginfo.h b/include/asm-generic/siginfo.h new file mode 100644 index 00000000000..9cac8e8dde5 --- /dev/null +++ b/include/asm-generic/siginfo.h @@ -0,0 +1,287 @@ +#ifndef _ASM_GENERIC_SIGINFO_H +#define _ASM_GENERIC_SIGINFO_H + +#include <linux/compiler.h> +#include <linux/types.h> + +typedef union sigval { + int sival_int; + void __user *sival_ptr; +} sigval_t; + +/* + * This is the size (including padding) of the part of the + * struct siginfo that is before the union. + */ +#ifndef __ARCH_SI_PREAMBLE_SIZE +#define __ARCH_SI_PREAMBLE_SIZE (3 * sizeof(int)) +#endif + +#define SI_MAX_SIZE 128 +#ifndef SI_PAD_SIZE +#define SI_PAD_SIZE ((SI_MAX_SIZE - __ARCH_SI_PREAMBLE_SIZE) / sizeof(int)) +#endif + +#ifndef __ARCH_SI_UID_T +#define __ARCH_SI_UID_T uid_t +#endif + +/* + * The default "si_band" type is "long", as specified by POSIX. + * However, some architectures want to override this to "int" + * for historical compatibility reasons, so we allow that. + */ +#ifndef __ARCH_SI_BAND_T +#define __ARCH_SI_BAND_T long +#endif + +#ifndef HAVE_ARCH_SIGINFO_T + +typedef struct siginfo { + int si_signo; + int si_errno; + int si_code; + + union { + int _pad[SI_PAD_SIZE]; + + /* kill() */ + struct { + pid_t _pid; /* sender's pid */ + __ARCH_SI_UID_T _uid; /* sender's uid */ + } _kill; + + /* POSIX.1b timers */ + struct { + timer_t _tid; /* timer id */ + int _overrun; /* overrun count */ + char _pad[sizeof( __ARCH_SI_UID_T) - sizeof(int)]; + sigval_t _sigval; /* same as below */ + int _sys_private; /* not to be passed to user */ + } _timer; + + /* POSIX.1b signals */ + struct { + pid_t _pid; /* sender's pid */ + __ARCH_SI_UID_T _uid; /* sender's uid */ + sigval_t _sigval; + } _rt; + + /* SIGCHLD */ + struct { + pid_t _pid; /* which child */ + __ARCH_SI_UID_T _uid; /* sender's uid */ + int _status; /* exit code */ + clock_t _utime; + clock_t _stime; + } _sigchld; + + /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ + struct { + void __user *_addr; /* faulting insn/memory ref. */ +#ifdef __ARCH_SI_TRAPNO + int _trapno; /* TRAP # which caused the signal */ +#endif + } _sigfault; + + /* SIGPOLL */ + struct { + __ARCH_SI_BAND_T _band; /* POLL_IN, POLL_OUT, POLL_MSG */ + int _fd; + } _sigpoll; + } _sifields; +} siginfo_t; + +#endif + +/* + * How these fields are to be accessed. + */ +#define si_pid _sifields._kill._pid +#define si_uid _sifields._kill._uid +#define si_tid _sifields._timer._tid +#define si_overrun _sifields._timer._overrun +#define si_sys_private _sifields._timer._sys_private +#define si_status _sifields._sigchld._status +#define si_utime _sifields._sigchld._utime +#define si_stime _sifields._sigchld._stime +#define si_value _sifields._rt._sigval +#define si_int _sifields._rt._sigval.sival_int +#define si_ptr _sifields._rt._sigval.sival_ptr +#define si_addr _sifields._sigfault._addr +#ifdef __ARCH_SI_TRAPNO +#define si_trapno _sifields._sigfault._trapno +#endif +#define si_band _sifields._sigpoll._band +#define si_fd _sifields._sigpoll._fd + +#ifdef __KERNEL__ +#define __SI_MASK 0xffff0000u +#define __SI_KILL (0 << 16) +#define __SI_TIMER (1 << 16) +#define __SI_POLL (2 << 16) +#define __SI_FAULT (3 << 16) +#define __SI_CHLD (4 << 16) +#define __SI_RT (5 << 16) +#define __SI_MESGQ (6 << 16) +#define __SI_CODE(T,N) ((T) | ((N) & 0xffff)) +#else +#define __SI_KILL 0 +#define __SI_TIMER 0 +#define __SI_POLL 0 +#define __SI_FAULT 0 +#define __SI_CHLD 0 +#define __SI_RT 0 +#define __SI_MESGQ 0 +#define __SI_CODE(T,N) (N) +#endif + +/* + * si_code values + * Digital reserves positive values for kernel-generated signals. + */ +#define SI_USER 0 /* sent by kill, sigsend, raise */ +#define SI_KERNEL 0x80 /* sent by the kernel from somewhere */ +#define SI_QUEUE -1 /* sent by sigqueue */ +#define SI_TIMER __SI_CODE(__SI_TIMER,-2) /* sent by timer expiration */ +#define SI_MESGQ __SI_CODE(__SI_MESGQ,-3) /* sent by real time mesq state change */ +#define SI_ASYNCIO -4 /* sent by AIO completion */ +#define SI_SIGIO -5 /* sent by queued SIGIO */ +#define SI_TKILL -6 /* sent by tkill system call */ +#define SI_DETHREAD -7 /* sent by execve() killing subsidiary threads */ + +#define SI_FROMUSER(siptr) ((siptr)->si_code <= 0) +#define SI_FROMKERNEL(siptr) ((siptr)->si_code > 0) + +/* + * SIGILL si_codes + */ +#define ILL_ILLOPC (__SI_FAULT|1) /* illegal opcode */ +#define ILL_ILLOPN (__SI_FAULT|2) /* illegal operand */ +#define ILL_ILLADR (__SI_FAULT|3) /* illegal addressing mode */ +#define ILL_ILLTRP (__SI_FAULT|4) /* illegal trap */ +#define ILL_PRVOPC (__SI_FAULT|5) /* privileged opcode */ +#define ILL_PRVREG (__SI_FAULT|6) /* privileged register */ +#define ILL_COPROC (__SI_FAULT|7) /* coprocessor error */ +#define ILL_BADSTK (__SI_FAULT|8) /* internal stack error */ +#define NSIGILL 8 + +/* + * SIGFPE si_codes + */ +#define FPE_INTDIV (__SI_FAULT|1) /* integer divide by zero */ +#define FPE_INTOVF (__SI_FAULT|2) /* integer overflow */ +#define FPE_FLTDIV (__SI_FAULT|3) /* floating point divide by zero */ +#define FPE_FLTOVF (__SI_FAULT|4) /* floating point overflow */ +#define FPE_FLTUND (__SI_FAULT|5) /* floating point underflow */ +#define FPE_FLTRES (__SI_FAULT|6) /* floating point inexact result */ +#define FPE_FLTINV (__SI_FAULT|7) /* floating point invalid operation */ +#define FPE_FLTSUB (__SI_FAULT|8) /* subscript out of range */ +#define NSIGFPE 8 + +/* + * SIGSEGV si_codes + */ +#define SEGV_MAPERR (__SI_FAULT|1) /* address not mapped to object */ +#define SEGV_ACCERR (__SI_FAULT|2) /* invalid permissions for mapped object */ +#define NSIGSEGV 2 + +/* + * SIGBUS si_codes + */ +#define BUS_ADRALN (__SI_FAULT|1) /* invalid address alignment */ +#define BUS_ADRERR (__SI_FAULT|2) /* non-existant physical address */ +#define BUS_OBJERR (__SI_FAULT|3) /* object specific hardware error */ +#define NSIGBUS 3 + +/* + * SIGTRAP si_codes + */ +#define TRAP_BRKPT (__SI_FAULT|1) /* process breakpoint */ +#define TRAP_TRACE (__SI_FAULT|2) /* process trace trap */ +#define NSIGTRAP 2 + +/* + * SIGCHLD si_codes + */ +#define CLD_EXITED (__SI_CHLD|1) /* child has exited */ +#define CLD_KILLED (__SI_CHLD|2) /* child was killed */ +#define CLD_DUMPED (__SI_CHLD|3) /* child terminated abnormally */ +#define CLD_TRAPPED (__SI_CHLD|4) /* traced child has trapped */ +#define CLD_STOPPED (__SI_CHLD|5) /* child has stopped */ +#define CLD_CONTINUED (__SI_CHLD|6) /* stopped child has continued */ +#define NSIGCHLD 6 + +/* + * SIGPOLL si_codes + */ +#define POLL_IN (__SI_POLL|1) /* data input available */ +#define POLL_OUT (__SI_POLL|2) /* output buffers available */ +#define POLL_MSG (__SI_POLL|3) /* input message available */ +#define POLL_ERR (__SI_POLL|4) /* i/o error */ +#define POLL_PRI (__SI_POLL|5) /* high priority input available */ +#define POLL_HUP (__SI_POLL|6) /* device disconnected */ +#define NSIGPOLL 6 + +/* + * sigevent definitions + * + * It seems likely that SIGEV_THREAD will have to be handled from + * userspace, libpthread transmuting it to SIGEV_SIGNAL, which the + * thread manager then catches and does the appropriate nonsense. + * However, everything is written out here so as to not get lost. + */ +#define SIGEV_SIGNAL 0 /* notify via signal */ +#define SIGEV_NONE 1 /* other notification: meaningless */ +#define SIGEV_THREAD 2 /* deliver via thread creation */ +#define SIGEV_THREAD_ID 4 /* deliver to thread */ + +#define SIGEV_MAX_SIZE 64 +#ifndef SIGEV_PAD_SIZE +#define SIGEV_PAD_SIZE ((SIGEV_MAX_SIZE/sizeof(int)) - 3) +#endif + +typedef struct sigevent { + sigval_t sigev_value; + int sigev_signo; + int sigev_notify; + union { + int _pad[SIGEV_PAD_SIZE]; + int _tid; + + struct { + void (*_function)(sigval_t); + void *_attribute; /* really pthread_attr_t */ + } _sigev_thread; + } _sigev_un; +} sigevent_t; + +#define sigev_notify_function _sigev_un._sigev_thread._function +#define sigev_notify_attributes _sigev_un._sigev_thread._attribute +#define sigev_notify_thread_id _sigev_un._tid + +#ifdef __KERNEL__ + +struct siginfo; +void do_schedule_next_timer(struct siginfo *info); + +#ifndef HAVE_ARCH_COPY_SIGINFO + +#include <linux/string.h> + +static inline void copy_siginfo(struct siginfo *to, struct siginfo *from) +{ + if (from->si_code < 0) + memcpy(to, from, sizeof(*to)); + else + /* _sigchld is currently the largest know union member */ + memcpy(to, from, __ARCH_SI_PREAMBLE_SIZE + sizeof(from->_sifields._sigchld)); +} + +#endif + +extern int copy_siginfo_to_user(struct siginfo __user *to, struct siginfo *from); + +#endif /* __KERNEL__ */ + +#endif |