DragonOS/kernel/exception/trap.c

#include "trap.h"
#include "gate.h"
#include "../process/ptrace.h"

void init_sys_vector()
{
    set_trap_gate(0, 1, divide_error);
    set_trap_gate(1, 1, debug);
    set_intr_gate(2, 1, nmi);
    set_system_trap_gate(3, 1, int3);
    set_system_trap_gate(4, 1, overflow);
    set_system_trap_gate(5, 1, bounds);
    set_trap_gate(6, 1, undefined_opcode);
    set_trap_gate(7, 1, dev_not_avaliable);
    set_trap_gate(8, 1, double_fault);
    set_trap_gate(9, 1, coprocessor_segment_overrun);
    set_trap_gate(10, 1, invalid_TSS);
    set_trap_gate(11, 1, segment_not_exists);
    set_trap_gate(12, 1, stack_segment_fault);
    set_trap_gate(13, 1, general_protection);
    set_trap_gate(14, 1, page_fault);
    // 中断号15由Intel保留，不能使用
    set_trap_gate(16, 1, x87_FPU_error);
    set_trap_gate(17, 1, alignment_check);
    set_trap_gate(18, 1, machine_check);
    set_trap_gate(19, 1, SIMD_exception);
    set_trap_gate(20, 1, virtualization_exception);
    // 中断号21-31由Intel保留，不能使用

    // 32-255为用户自定义中断内部
}

// 0 #DE 除法错误
void do_divide_error(struct pt_regs * regs, unsigned long error_code)
{
    
    printk("[ ");
    printk_color(RED, BLACK, "ERROR");
    printk(" ] do_divide_error(0),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip);

    while (1)
        ;
}

// 1 #DB 调试异常
void do_debug(struct pt_regs * regs, unsigned long error_code)
{
     
    printk("[ ");
    printk_color(RED, BLACK, "ERROR / TRAP");
    printk(" ] do_debug(1),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip);

    while (1)
        ;
}

// 2 不可屏蔽中断
void do_nmi(struct pt_regs * regs, unsigned long error_code)
{
     
    printk("[ ");
    printk_color(BLUE, BLACK, "INT");
    printk(" ] do_nmi(2),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip);

    while (1)
        ;
}

// 3 #BP 断点异常
void do_int3(struct pt_regs * regs, unsigned long error_code)
{
     
    printk("[ ");
    printk_color(YELLOW, BLACK, "TRAP");
    printk(" ] do_int3(3),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip);

    while (1)
        ;
}

// 4 #OF 溢出异常
void do_overflow(struct pt_regs * regs, unsigned long error_code)
{
     
    printk("[ ");
    printk_color(YELLOW, BLACK, "TRAP");
    printk(" ] do_overflow(4),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip);

    while (1)
        ;
}

// 5 #BR 越界异常
void do_bounds(struct pt_regs * regs, unsigned long error_code)
{
     
    printk("[ ");
    printk_color(RED, BLACK, "ERROR");
    printk(" ] do_bounds(5),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip);

    while (1)
        ;
}

// 6 #UD 无效/未定义的机器码
void do_undefined_opcode(struct pt_regs * regs, unsigned long error_code)
{
    
    printk("[ ");
    printk_color(RED, BLACK, "ERROR");
    printk(" ] do_undefined_opcode(6),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip);

    while (1)
        ;
}

// 7 #NM 设备异常（FPU不存在）
void do_dev_not_avaliable(struct pt_regs * regs, unsigned long error_code)
{
    
    printk("[ ");
    printk_color(RED, BLACK, "ERROR");
    printk(" ] do_dev_not_avaliable(7),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip);

    while (1)
        ;
}

// 8 #DF 双重错误
void do_double_fault(struct pt_regs * regs, unsigned long error_code)
{
    
    printk("[ ");
    printk_color(RED, BLACK, "Terminate");
    printk(" ] do_double_fault(8),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip);

    while (1)
        ;
}

// 9 协处理器越界（保留）
void do_coprocessor_segment_overrun(struct pt_regs * regs, unsigned long error_code)
{
    
    printk("[ ");
    printk_color(RED, BLACK, "ERROR");
    printk(" ] do_coprocessor_segment_overrun(9),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip);

    while (1)
        ;
}

// 10 #TS 无效的TSS段
void do_invalid_TSS(struct pt_regs * regs, unsigned long error_code)
{
    
    printk("[");
    printk_color(RED, BLACK, "ERROR");
    printk("] do_invalid_TSS(10),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip);

    printk_color(YELLOW, BLACK, "Information:\n");
    // 解析错误码
    if (error_code & 0x01)
        printk("The exception occurred during delivery of an event external to the program.\n");

    if (error_code & 0x02)
        printk("Refers to a descriptor in the IDT.\n");
    else
    {
        if (error_code & 0x04)
            printk("Refers to a descriptor in the current LDT.\n");
        else
            printk("Refers to a descriptor in the GDT.\n");
    }

    printk("Segment Selector Index:%10x\n", error_code & 0xfff8);

    printk("\n");

    while (1)
        ;
}

// 11 #NP 段不存在
void do_segment_not_exists(struct pt_regs * regs, unsigned long error_code)
{
    
    printk("[ ");
    printk_color(RED, BLACK, "ERROR");
    printk(" ] do_segment_not_exists(11),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip);

    while (1)
        ;
}

// 12 #SS SS段错误
void do_stack_segment_fault(struct pt_regs * regs, unsigned long error_code)
{
    
    printk("[ ");
    printk_color(RED, BLACK, "ERROR");
    printk(" ] do_stack_segment_fault(12),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip);

    while (1)
        ;
}

// 13 #GP 通用保护性异常
void do_general_protection(struct pt_regs * regs, unsigned long error_code)
{
    
    printk("[ ");
    printk_color(RED, BLACK, "ERROR");
    printk(" ] do_general_protection(13),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip);
    if(error_code & 0x01)
		printk_color(RED,BLACK,"The exception occurred during delivery of an event external to the program,such as an interrupt or an earlier exception.\n");

	if(error_code & 0x02)
		printk_color(RED,BLACK,"Refers to a gate descriptor in the IDT;\n");
	else
		printk_color(RED,BLACK,"Refers to a descriptor in the GDT or the current LDT;\n");

	if((error_code & 0x02) == 0)
		if(error_code & 0x04)
			printk_color(RED,BLACK,"Refers to a segment or gate descriptor in the LDT;\n");
		else
			printk_color(RED,BLACK,"Refers to a descriptor in the current GDT;\n");

	printk_color(RED,BLACK,"Segment Selector Index:%#010x\n",error_code & 0xfff8);
    while (1)
        ;
}

// 14 #PF 页故障
void do_page_fault(struct pt_regs * regs, unsigned long error_code)
{
    unsigned long cr2 = 0;
    // 先保存cr2寄存器的值，避免由于再次触发页故障而丢失值
    // cr2存储着触发异常的线性地址
    __asm__ __volatile__("movq %%cr2, %0"
                         : "=r"(cr2)::"memory");

    
    printk("[ ");
    printk_color(RED, BLACK, "ERROR");
    printk(" ] do_page_fault(14),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\tCR2:%#18lx\n", error_code, regs->rsp, regs->rip, cr2);

    printk_color(YELLOW, BLACK, "Information:\n");
    if (!(error_code & 0x01))
        printk("Page does not exist.\n");

    if (error_code & 0x02)
        printk("Fault occurred during operation: writing\n");
    else
        printk("Fault occurred during operation: reading\n");

    if (error_code & 0x04)
        printk("Fault in user level(3).\n");
    else
        printk("Fault in supervisor level(0,1,2).\n");

    if (error_code & 0x08)
        printk("Reserved bit caused the fault.\n");

    if (error_code & 0x10)
        printk("Fault occurred during fetching instruction.\n");

    while (1)
        ;
}

// 15 Intel保留，请勿使用

// 16 #MF x87FPU错误
void do_x87_FPU_error(struct pt_regs * regs, unsigned long error_code)
{
    
    printk("[ ");
    printk_color(RED, BLACK, "ERROR");
    printk(" ] do_x87_FPU_error(16),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip);

    while (1)
        ;
}

// 17 #AC 对齐检测
void do_alignment_check(struct pt_regs * regs, unsigned long error_code)
{
    
    printk("[ ");
    printk_color(RED, BLACK, "ERROR");
    printk(" ] do_alignment_check(17),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip);

    while (1)
        ;
}

// 18 #MC 机器检测
void do_machine_check(struct pt_regs * regs, unsigned long error_code)
{
    
    printk("[ ");
    printk_color(RED, BLACK, "ERROR");
    printk(" ] do_machine_check(18),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip);

    while (1)
        ;
}

// 19 #XM SIMD浮点异常
void do_SIMD_exception(struct pt_regs * regs, unsigned long error_code)
{
    
    printk("[ ");
    printk_color(RED, BLACK, "ERROR");
    printk(" ] do_SIMD_exception(19),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip);

    while (1)
        ;
}

// 20 #VE 虚拟化异常
void do_virtualization_exception(struct pt_regs * regs, unsigned long error_code)
{
    
    printk("[ ");
    printk_color(RED, BLACK, "ERROR");
    printk(" ] do_virtualization_exception(20),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip);

    while (1)
        ;
}

// 21-21 Intel保留，请勿使用