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- #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
-
- /* 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__ */
-
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