#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__ */