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 */ 89