1991/0614/pc/trap.c (diff list | history)

pc/trap.c on 1991/0613
1991/0613		#include "u.h" #include "lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "io.h" void ediv(void); void edebug(void); void enmi(void); void ebp(void); void eover(void); void ebound(void); void ebadop(void); void enoco(void); void edfault(void); void enoway(void); void etss(void); void enoseg(void); void estack(void); void eprot(void); void efault(void); /* * exception types */ enum { Ediv= 0, /* divide error */ Edebug= 1, /* debug exceptions */ Enmi= 2, /* non-maskable interrupt */ Ebp= 3, /* INT 3 */ Eover= 4, /* overflow */ Ebound= 5, /* bounds check */ Ebadop= 6, /* invalid opcode */ Enoco= 7, /* coprocessor not available */ Edfault=8, /* double fault */ Etss= 10, /* invalid tss */ Enoseg= 11, /* segment not present */ Estack= 12, /* stack exception */ Eprot= 13, /* general protection */ Efault= 14, /* page fault */ Eco= 16, /* coprocessor error */ }; /*
1991/0614		* trap/interrupt gates
1991/0613		*/ Segdesc ilt[256] = { [Ediv] TRAPGATE(KESEL, ediv, 3), [Edebug] TRAPGATE(KESEL, edebug, 3), [Enmi] INTRGATE(KESEL, enmi, 3), [Ebp] TRAPGATE(KESEL, ebp, 3), [Eover] TRAPGATE(KESEL, eover, 3), [Ebound] TRAPGATE(KESEL, ebound, 3), [Ebadop] TRAPGATE(KESEL, ebadop, 3), [Enoco] TRAPGATE(KESEL, enoco, 3), [Edfault] TRAPGATE(KESEL, edfault, 3), [Etss] TRAPGATE(KESEL, etss, 3), [Enoseg] TRAPGATE(KESEL, enoseg, 3), [Estack] TRAPGATE(KESEL, estack, 3), [Eprot] TRAPGATE(KESEL, eprot, 3), [Efault] TRAPGATE(KESEL, efault, 3), [Eco] TRAPGATE(KESEL, eco, 3), };
1991/0614		/* * trap table */ uchar traptab[4096]; /* * set up some basic vectored interrupts */ trapinit( /* * j-random uncaught trap or interrupt */ void trap(void) { panic("unknown trap"); }