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