147 lines
3.5 KiB
C
147 lines
3.5 KiB
C
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#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 _ANSI_H
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#include <ansi.h>
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#endif
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#ifndef _CONFIG_H
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#include <minix/config.h>
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#endif
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#if !defined(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 (CHIP == INTEL)
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struct sigregs {
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#if _WORD_SIZE == 4
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short sr_gs;
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short sr_fs;
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#endif /* _WORD_SIZE == 4 */
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short sr_es;
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short sr_ds;
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int sr_di;
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int sr_si;
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int sr_bp;
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int sr_st; /* stack top -- used in kernel */
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int sr_bx;
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int sr_dx;
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int sr_cx;
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int sr_retreg;
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int sr_retadr; /* return address to caller of save -- used
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* in kernel */
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int sr_pc;
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int sr_cs;
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int sr_psw;
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int sr_sp;
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int sr_ss;
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};
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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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#if (CHIP == M68000)
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struct sigregs {
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long sr_retreg; /* d0 */
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long sr_d1;
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long sr_d2;
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long sr_d3;
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long sr_d4;
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long sr_d5;
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long sr_d6;
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long sr_d7;
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long sr_a0;
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long sr_a1;
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long sr_a2;
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long sr_a3;
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long sr_a4;
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long sr_a5;
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long sr_a6;
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long sr_sp; /* also known as a7 */
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long sr_pc;
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short sr_psw;
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short sr_dummy; /* make size multiple of 4 for system.c */
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};
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#else
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#include "error, CHIP is not supported"
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#endif
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#endif /* CHIP == INTEL */
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struct sigcontext {
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int sc_flags; /* sigstack state to restore */
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long sc_mask; /* signal mask to restore */
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struct sigregs sc_regs; /* register set to restore */
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};
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#if (CHIP == INTEL)
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#if _WORD_SIZE == 4
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#define sc_gs sc_regs.sr_gs
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#define sc_fs sc_regs.sr_fs
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#endif /* _WORD_SIZE == 4 */
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#define sc_es sc_regs.sr_es
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#define sc_ds sc_regs.sr_ds
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#define sc_di sc_regs.sr_di
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#define sc_si sc_regs.sr_si
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#define sc_fp sc_regs.sr_bp
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#define sc_st sc_regs.sr_st /* stack top -- used in kernel */
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#define sc_bx sc_regs.sr_bx
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#define sc_dx sc_regs.sr_dx
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#define sc_cx sc_regs.sr_cx
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#define sc_retreg sc_regs.sr_retreg
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#define sc_retadr sc_regs.sr_retadr /* return address to caller of
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save -- used in kernel */
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#define sc_pc sc_regs.sr_pc
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#define sc_cs sc_regs.sr_cs
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#define sc_psw sc_regs.sr_psw
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#define sc_sp sc_regs.sr_sp
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#define sc_ss sc_regs.sr_ss
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#endif /* CHIP == INTEL */
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#if (CHIP == M68000)
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#define sc_retreg sc_regs.sr_retreg
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#define sc_d1 sc_regs.sr_d1
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#define sc_d2 sc_regs.sr_d2
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#define sc_d3 sc_regs.sr_d3
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#define sc_d4 sc_regs.sr_d4
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#define sc_d5 sc_regs.sr_d5
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#define sc_d6 sc_regs.sr_d6
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#define sc_d7 sc_regs.sr_d7
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#define sc_a0 sc_regs.sr_a0
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#define sc_a1 sc_regs.sr_a1
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#define sc_a2 sc_regs.sr_a2
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#define sc_a3 sc_regs.sr_a3
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#define sc_a4 sc_regs.sr_a4
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#define sc_a5 sc_regs.sr_a5
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#define sc_fp sc_regs.sr_a6
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#define sc_sp sc_regs.sr_sp
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#define sc_pc sc_regs.sr_pc
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#define sc_psw sc_regs.sr_psw
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#endif /* CHIP == M68000 */
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/* Values for sc_flags. Must agree with <minix/jmp_buf.h>. */
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#define SC_SIGCONTEXT 2 /* nonzero when signal context is included */
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#define SC_NOREGLOCALS 4 /* nonzero when registers are not to be
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saved and restored */
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_PROTOTYPE( int sigreturn, (struct sigcontext *_scp) );
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#endif /* _SIGCONTEXT_H */
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