include/linux/signal_types.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_SIGNAL_TYPES_H
   3 #define _LINUX_SIGNAL_TYPES_H
   4
   5 /*
   6  * Basic signal handling related data type definitions:
   7  */
   8
   9 #include <linux/types.h>
  10 #include <uapi/linux/signal.h>
  11
  12 typedef struct kernel_siginfo {
  13         __SIGINFO;
  14 } kernel_siginfo_t;
  15
  16 struct ucounts;
  17
  18 /*
  19  * Real Time signals may be queued.
  20  */
  21
  22 struct sigqueue {
  23         struct list_head list;
  24         int flags;
  25         kernel_siginfo_t info;
  26         struct ucounts *ucounts;
  27 };
  28
  29 /* flags values. */
  30 #define SIGQUEUE_PREALLOC       1
  31
  32 struct sigpending {
  33         struct list_head list;
  34         sigset_t signal;
  35 };
  36
  37 struct sigaction {
  38 #ifndef __ARCH_HAS_IRIX_SIGACTION
  39         __sighandler_t  sa_handler;
  40         unsigned long   sa_flags;
  41 #else
  42         unsigned int    sa_flags;
  43         __sighandler_t  sa_handler;
  44 #endif
  45 #ifdef __ARCH_HAS_SA_RESTORER
  46         __sigrestore_t sa_restorer;
  47 #endif
  48         sigset_t        sa_mask;        /* mask last for extensibility */
  49 };
  50
  51 struct k_sigaction {
  52         struct sigaction sa;
  53 #ifdef __ARCH_HAS_KA_RESTORER
  54         __sigrestore_t ka_restorer;
  55 #endif
  56 };
  57
  58 #ifdef CONFIG_OLD_SIGACTION
  59 struct old_sigaction {
  60         __sighandler_t sa_handler;
  61         old_sigset_t sa_mask;
  62         unsigned long sa_flags;
  63         __sigrestore_t sa_restorer;
  64 };
  65 #endif
  66
  67 struct ksignal {
  68         struct k_sigaction ka;
  69         kernel_siginfo_t info;
  70         int sig;
  71 };
  72
  73 /* Used to kill the race between sigaction and forced signals */
  74 #define SA_IMMUTABLE            0x00800000
  75
  76 #ifndef __ARCH_UAPI_SA_FLAGS
  77 #ifdef SA_RESTORER
  78 #define __ARCH_UAPI_SA_FLAGS    SA_RESTORER
  79 #else
  80 #define __ARCH_UAPI_SA_FLAGS    0
  81 #endif
  82 #endif
  83
  84 #define UAPI_SA_FLAGS                                                          \
  85         (SA_NOCLDSTOP | SA_NOCLDWAIT | SA_SIGINFO | SA_ONSTACK | SA_RESTART |  \
  86          SA_NODEFER | SA_RESETHAND | SA_EXPOSE_TAGBITS | __ARCH_UAPI_SA_FLAGS)
  87
  88 #endif /* _LINUX_SIGNAL_TYPES_H */