include/sys/sigcontext.h

   1 #ifndef _SIGCONTEXT_H
   2 #define _SIGCONTEXT_H
   3
   4 /* The sigcontext structure is used by the sigreturn(2) system call.
   5  * sigreturn() is seldom called by user programs, but it is used internally
   6  * by the signal catching mechanism.
   7  */
   8
   9 #ifndef _ANSI_H
  10 #include <ansi.h>
  11 #endif
  12
  13 #ifndef _MINIX_SYS_CONFIG_H
  14 #include <minix/sys_config.h>
  15 #endif
  16
  17 #if !defined(_MINIX_CHIP)
  18 #include "error, configuration is not known"
  19 #endif
  20
  21 /* The following structure should match the stackframe_s structure used
  22  * by the kernel's context switching code.  Floating point registers should
  23  * be added in a different struct.
  24  */
  25 #if (_MINIX_CHIP == _CHIP_INTEL)
  26 struct sigregs {
  27 #if _WORD_SIZE == 4
  28   short sr_gs;
  29   short sr_fs;
  30 #endif /* _WORD_SIZE == 4 */
  31   short sr_es;
  32   short sr_ds;
  33   int sr_di;
  34   int sr_si;
  35   int sr_bp;
  36   int sr_st;                    /* stack top -- used in kernel */
  37   int sr_bx;
  38   int sr_dx;
  39   int sr_cx;
  40   int sr_retreg;
  41   int sr_retadr;                /* return address to caller of save -- used
  42                                  * in kernel */
  43   int sr_pc;
  44   int sr_cs;
  45   int sr_psw;
  46   int sr_sp;
  47   int sr_ss;
  48 };
  49
  50 struct sigframe {               /* stack frame created for signalled process */
  51   _PROTOTYPE( void (*sf_retadr), (void) );
  52   int sf_signo;
  53   int sf_code;
  54   struct sigcontext *sf_scp;
  55   int sf_fp;
  56   _PROTOTYPE( void (*sf_retadr2), (void) );
  57   struct sigcontext *sf_scpcopy;
  58 };
  59
  60 #else
  61 #if (_MINIX_CHIP == _CHIP_M68000)
  62 struct sigregs {
  63   long sr_retreg;                       /* d0 */
  64   long sr_d1;
  65   long sr_d2;
  66   long sr_d3;
  67   long sr_d4;
  68   long sr_d5;
  69   long sr_d6;
  70   long sr_d7;
  71   long sr_a0;
  72   long sr_a1;
  73   long sr_a2;
  74   long sr_a3;
  75   long sr_a4;
  76   long sr_a5;
  77   long sr_a6;
  78   long sr_sp;                   /* also known as a7 */
  79   long sr_pc;
  80   short sr_psw;
  81   short sr_dummy;               /* make size multiple of 4 for system.c */
  82 };
  83 #else
  84 #include "error, _MINIX_CHIP is not supported"
  85 #endif
  86 #endif /* _MINIX_CHIP == _CHIP_INTEL */
  87
  88 struct sigcontext {
  89   int sc_flags;                 /* sigstack state to restore */
  90   long sc_mask;                 /* signal mask to restore */
  91   struct sigregs sc_regs;       /* register set to restore */
  92 };
  93
  94 #if (_MINIX_CHIP == _CHIP_INTEL)
  95 #if _WORD_SIZE == 4
  96 #define sc_gs sc_regs.sr_gs
  97 #define sc_fs sc_regs.sr_fs
  98 #endif /* _WORD_SIZE == 4 */
  99 #define sc_es sc_regs.sr_es
 100 #define sc_ds sc_regs.sr_ds
 101 #define sc_di sc_regs.sr_di
 102 #define sc_si sc_regs.sr_si
 103 #define sc_fp sc_regs.sr_bp
 104 #define sc_st sc_regs.sr_st             /* stack top -- used in kernel */
 105 #define sc_bx sc_regs.sr_bx
 106 #define sc_dx sc_regs.sr_dx
 107 #define sc_cx sc_regs.sr_cx
 108 #define sc_retreg sc_regs.sr_retreg
 109 #define sc_retadr sc_regs.sr_retadr     /* return address to caller of
 110                                         save -- used in kernel */
 111 #define sc_pc sc_regs.sr_pc
 112 #define sc_cs sc_regs.sr_cs
 113 #define sc_psw sc_regs.sr_psw
 114 #define sc_sp sc_regs.sr_sp
 115 #define sc_ss sc_regs.sr_ss
 116 #endif /* _MINIX_CHIP == _CHIP_INTEL */
 117
 118 #if (_MINIX_CHIP == M68000)
 119 #define sc_retreg sc_regs.sr_retreg
 120 #define sc_d1 sc_regs.sr_d1
 121 #define sc_d2 sc_regs.sr_d2
 122 #define sc_d3 sc_regs.sr_d3
 123 #define sc_d4 sc_regs.sr_d4
 124 #define sc_d5 sc_regs.sr_d5
 125 #define sc_d6 sc_regs.sr_d6
 126 #define sc_d7 sc_regs.sr_d7
 127 #define sc_a0 sc_regs.sr_a0
 128 #define sc_a1 sc_regs.sr_a1
 129 #define sc_a2 sc_regs.sr_a2
 130 #define sc_a3 sc_regs.sr_a3
 131 #define sc_a4 sc_regs.sr_a4
 132 #define sc_a5 sc_regs.sr_a5
 133 #define sc_fp sc_regs.sr_a6
 134 #define sc_sp sc_regs.sr_sp
 135 #define sc_pc sc_regs.sr_pc
 136 #define sc_psw sc_regs.sr_psw
 137 #endif /* _MINIX_CHIP == M68000 */
 138
 139 _PROTOTYPE( int sigreturn, (struct sigcontext *_scp)                    );
 140
 141 #endif /* _SIGCONTEXT_H */