You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
91 lines
2.9 KiB
91 lines
2.9 KiB
#ifndef __KERN_TRAP_TRAP_H__
|
|
#define __KERN_TRAP_TRAP_H__
|
|
|
|
#include <defs.h>
|
|
|
|
/* Trap Numbers */
|
|
|
|
/* Processor-defined: */
|
|
#define T_DIVIDE 0 // divide error
|
|
#define T_DEBUG 1 // debug exception
|
|
#define T_NMI 2 // non-maskable interrupt
|
|
#define T_BRKPT 3 // breakpoint
|
|
#define T_OFLOW 4 // overflow
|
|
#define T_BOUND 5 // bounds check
|
|
#define T_ILLOP 6 // illegal opcode
|
|
#define T_DEVICE 7 // device not available
|
|
#define T_DBLFLT 8 // double fault
|
|
// #define T_COPROC 9 // reserved (not used since 486)
|
|
#define T_TSS 10 // invalid task switch segment
|
|
#define T_SEGNP 11 // segment not present
|
|
#define T_STACK 12 // stack exception
|
|
#define T_GPFLT 13 // general protection fault
|
|
#define T_PGFLT 14 // page fault
|
|
// #define T_RES 15 // reserved
|
|
#define T_FPERR 16 // floating point error
|
|
#define T_ALIGN 17 // aligment check
|
|
#define T_MCHK 18 // machine check
|
|
#define T_SIMDERR 19 // SIMD floating point error
|
|
|
|
#define T_SYSCALL 0x80 // SYSCALL, ONLY FOR THIS PROJ
|
|
|
|
/* Hardware IRQ numbers. We receive these as (IRQ_OFFSET + IRQ_xx) */
|
|
#define IRQ_OFFSET 32 // IRQ 0 corresponds to int IRQ_OFFSET
|
|
|
|
#define IRQ_TIMER 0
|
|
#define IRQ_KBD 1
|
|
#define IRQ_COM1 4
|
|
#define IRQ_IDE1 14
|
|
#define IRQ_IDE2 15
|
|
#define IRQ_ERROR 19
|
|
#define IRQ_SPURIOUS 31
|
|
|
|
/* *
|
|
* These are arbitrarily chosen, but with care not to overlap
|
|
* processor defined exceptions or interrupt vectors.
|
|
* */
|
|
#define T_SWITCH_TOU 120 // user/kernel switch
|
|
#define T_SWITCH_TOK 121 // user/kernel switch
|
|
|
|
/* registers as pushed by pushal */
|
|
struct pushregs {
|
|
uint32_t reg_edi;
|
|
uint32_t reg_esi;
|
|
uint32_t reg_ebp;
|
|
uint32_t reg_oesp; /* Useless */
|
|
uint32_t reg_ebx;
|
|
uint32_t reg_edx;
|
|
uint32_t reg_ecx;
|
|
uint32_t reg_eax;
|
|
};
|
|
|
|
struct trapframe {
|
|
struct pushregs tf_regs;
|
|
uint16_t tf_gs;
|
|
uint16_t tf_padding0;
|
|
uint16_t tf_fs;
|
|
uint16_t tf_padding1;
|
|
uint16_t tf_es;
|
|
uint16_t tf_padding2;
|
|
uint16_t tf_ds;
|
|
uint16_t tf_padding3;
|
|
uint32_t tf_trapno;
|
|
/* below here defined by x86 hardware */
|
|
uint32_t tf_err;
|
|
uintptr_t tf_eip;
|
|
uint16_t tf_cs;
|
|
uint16_t tf_padding4;
|
|
uint32_t tf_eflags;
|
|
/* below here only when crossing rings, such as from user to kernel */
|
|
uintptr_t tf_esp;
|
|
uint16_t tf_ss;
|
|
uint16_t tf_padding5;
|
|
} __attribute__((packed));
|
|
|
|
void idt_init(void);
|
|
void print_trapframe(struct trapframe *tf);
|
|
void print_regs(struct pushregs *regs);
|
|
bool trap_in_kernel(struct trapframe *tf);
|
|
|
|
#endif /* !__KERN_TRAP_TRAP_H__ */
|
|
|