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