sys/arch/i386/include/signal.h

   1 #ifndef _I386_SIGNAL_H_
   2 #define _I386_SIGNAL_H_
   3
   4 #include <sys/featuretest.h>
   5
   6 typedef int sig_atomic_t;
   7
   8 /* The following structure should match the stackframe_s structure used
   9  * by the kernel's context switching code.  Floating point registers should
  10  * be added in a different struct.
  11  */
  12
  13 #include <machine/stackframe.h>
  14 #include <machine/fpu.h>
  15
  16 typedef struct stackframe_s sigregs;
  17 struct sigframe {               /* stack frame created for signalled process */
  18   void (*sf_retadr)(void);
  19   int sf_signo;
  20   int sf_code;
  21   struct sigcontext *sf_scp;
  22   int sf_fp;
  23   void (*sf_retadr2)(void);
  24   struct sigcontext *sf_scpcopy;
  25 };
  26
  27 struct sigcontext {
  28   int trap_style;               /* how should context be restored? KTS_* */
  29   int sc_flags;                 /* sigstack state to restore (including
  30                                  * MF_FPU_INITIALIZED)
  31                                  */
  32   long sc_mask;                 /* signal mask to restore */
  33   sigregs sc_regs;              /* register set to restore */
  34   union fpu_state_u sc_fpu_state;
  35 };
  36
  37 #define sc_gs sc_regs.gs
  38 #define sc_fs sc_regs.fs
  39 #define sc_es sc_regs.es
  40 #define sc_ds sc_regs.ds
  41 #define sc_di sc_regs.di
  42 #define sc_si sc_regs.si
  43 #define sc_fp sc_regs.bp
  44 #define sc_st sc_regs.st                /* stack top -- used in kernel */
  45 #define sc_bx sc_regs.bx
  46 #define sc_dx sc_regs.dx
  47 #define sc_cx sc_regs.cx
  48 #define sc_retreg sc_regs.retreg
  49 #define sc_retadr sc_regs.retadr        /* return address to caller of
  50                                         save -- used in kernel */
  51 #define sc_pc sc_regs.pc
  52 #define sc_cs sc_regs.cs
  53 #define sc_psw sc_regs.psw
  54 #define sc_sp sc_regs.sp
  55 #define sc_ss sc_regs.ss
  56
  57 #ifdef _MINIX
  58 __BEGIN_DECLS
  59 int sigreturn(struct sigcontext *_scp);
  60 __END_DECLS
  61 #endif /* _MINIX */
  62
  63 #endif  /* !_I386_SIGNAL_H_ */