81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
#ifndef _SIGCONTEXT_H
|
|
#define _SIGCONTEXT_H
|
|
|
|
/* The sigcontext structure is used by the sigreturn(2) system call.
|
|
* sigreturn() is seldom called by user programs, but it is used internally
|
|
* by the signal catching mechanism.
|
|
*/
|
|
|
|
#ifndef _MINIX_ANSI_H
|
|
#include <minix/ansi.h>
|
|
#endif
|
|
|
|
#ifndef _MINIX_SYS_CONFIG_H
|
|
#include <minix/sys_config.h>
|
|
#endif
|
|
|
|
#if !defined(_MINIX_CHIP)
|
|
#include "error, configuration is not known"
|
|
#endif
|
|
|
|
/* The following structure should match the stackframe_s structure used
|
|
* by the kernel's context switching code. Floating point registers should
|
|
* be added in a different struct.
|
|
*/
|
|
#if (_MINIX_CHIP == _CHIP_INTEL)
|
|
#include <machine/stackframe.h>
|
|
#include <machine/fpu.h>
|
|
|
|
typedef struct stackframe_s sigregs;
|
|
struct sigframe { /* stack frame created for signalled process */
|
|
_PROTOTYPE( void (*sf_retadr), (void) );
|
|
int sf_signo;
|
|
int sf_code;
|
|
struct sigcontext *sf_scp;
|
|
int sf_fp;
|
|
_PROTOTYPE( void (*sf_retadr2), (void) );
|
|
struct sigcontext *sf_scpcopy;
|
|
};
|
|
|
|
#else
|
|
#include "error, _MINIX_CHIP is not supported"
|
|
#endif /* _MINIX_CHIP == _CHIP_INTEL */
|
|
|
|
struct sigcontext {
|
|
int sc_flags; /* sigstack state to restore (including
|
|
* MF_FPU_INITIALIZED)
|
|
*/
|
|
long sc_mask; /* signal mask to restore */
|
|
sigregs sc_regs; /* register set to restore */
|
|
#if (_MINIX_CHIP == _CHIP_INTEL)
|
|
union fpu_state_u sc_fpu_state;
|
|
#endif
|
|
};
|
|
|
|
#if (_MINIX_CHIP == _CHIP_INTEL)
|
|
#if _WORD_SIZE == 4
|
|
#define sc_gs sc_regs.gs
|
|
#define sc_fs sc_regs.fs
|
|
#endif /* _WORD_SIZE == 4 */
|
|
#define sc_es sc_regs.es
|
|
#define sc_ds sc_regs.ds
|
|
#define sc_di sc_regs.di
|
|
#define sc_si sc_regs.si
|
|
#define sc_fp sc_regs.bp
|
|
#define sc_st sc_regs.st /* stack top -- used in kernel */
|
|
#define sc_bx sc_regs.bx
|
|
#define sc_dx sc_regs.dx
|
|
#define sc_cx sc_regs.cx
|
|
#define sc_retreg sc_regs.retreg
|
|
#define sc_retadr sc_regs.retadr /* return address to caller of
|
|
save -- used in kernel */
|
|
#define sc_pc sc_regs.pc
|
|
#define sc_cs sc_regs.cs
|
|
#define sc_psw sc_regs.psw
|
|
#define sc_sp sc_regs.sp
|
|
#define sc_ss sc_regs.ss
|
|
#endif /* _MINIX_CHIP == _CHIP_INTEL */
|
|
|
|
_PROTOTYPE( int sigreturn, (struct sigcontext *_scp) );
|
|
|
|
#endif /* _SIGCONTEXT_H */
|