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Code Issues Releases Wiki Activity

解决了#DE会触发#UD的问题

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This commit is contained in:
fslongjin 2022-04-10 23:03:16 +08:00
parent f5f36aafd8
commit d78db8225c
6 changed files with 119 additions and 109 deletions
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48
kernel/exception/entry.S
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@ -1,6 +1,6 @@
#include"../common/asm.h" #include"../common/asm.h"
.code64 .code64
.section .text //.section .text
R15 = 0x00 R15 = 0x00
R14 = 0x08 R14 = 0x08
@ -56,7 +56,7 @@ Restore_all:
ret_from_exception: ret_from_exception:
// === 从中断中返回 === // === 从中断中返回 ===
.code64
ENTRY(ret_from_intr) ENTRY(ret_from_intr)
jmp Restore_all jmp Restore_all
@ -64,28 +64,27 @@ ENTRY(ret_from_intr)
Err_Code: Err_Code:
// ===== 有错误码的情况下，保存寄存器并跳转服务程序 // ===== 有错误码的情况下，保存寄存器并跳转服务程序
pushq %rax pushq %rax
movq %es, %rax movq %es, %rax
pushq %rax pushq %rax
movq %ds, %rax movq %ds, %rax
pushq %rax pushq %rax
xorq %rax, %rax
xorq %rax, %rax pushq %rbp
pushq %rdi
pushq %rbp pushq %rsi
pushq %rdi pushq %rdx
pushq %rsi pushq %rcx
pushq %rdx pushq %rbx
pushq %rcx pushq %r8
pushq %rbx pushq %r9
pushq %r8 pushq %r10
pushq %r9 pushq %r11
pushq %r10 pushq %r12
pushq %r11 pushq %r13
pushq %r12 pushq %r14
pushq %r13 pushq %r15
pushq %r14
pushq %r15
cld cld
@ -99,7 +98,7 @@ Err_Code:
movq %rsp, %rdi // 把栈指针装入rdi，作为函数的第一个的参数 movq %rsp, %rdi // 把栈指针装入rdi，作为函数的第一个的参数
callq %rdx //调用服务程序 带*号表示调用的是绝对地址 callq *%rdx //调用服务程序 带*号表示调用的是绝对地址
jmp ret_from_exception jmp ret_from_exception
// 系统调用入口 // 系统调用入口
@ -181,6 +180,7 @@ ENTRY(divide_error)
pushq $0 //由于#DE不会产生错误码，但是为了保持弹出结构的一致性，故也压入一个错误码0 pushq $0 //由于#DE不会产生错误码，但是为了保持弹出结构的一致性，故也压入一个错误码0
pushq %rax // 先将rax入栈 pushq %rax // 先将rax入栈
leaq do_divide_error(%rip), %rax // 获取中断服务程序的地址 leaq do_divide_error(%rip), %rax // 获取中断服务程序的地址
xchgq %rax, (%rsp) // 把FUNC的地址换入栈中 xchgq %rax, (%rsp) // 把FUNC的地址换入栈中
jmp Err_Code jmp Err_Code

10
kernel/exception/gate.h
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@ -100,9 +100,8 @@ void set_tss_descriptor(unsigned int n, void *addr)
unsigned long limit = 103; unsigned long limit = 103;
*(unsigned long *)(phys_2_virt(GDT_Table) + n) = (limit & 0xffff) | (((unsigned long)addr & 0xffff) << 16) | ((((unsigned long)addr >> 16) & 0xff) << 32) | ((unsigned long)0x89 << 40) | ((limit >> 16 & 0xf) << 48) | (((unsigned long)addr >> 24 & 0xff) << 56); /////89 is attribute *(unsigned long *)(phys_2_virt(GDT_Table + n)) = (limit & 0xffff) | (((unsigned long)addr & 0xffff) << 16) | ((((unsigned long)addr >> 16) & 0xff) << 32) | ((unsigned long)0x89 << 40) | ((limit >> 16 & 0xf) << 48) | (((unsigned long)addr >> 24 & 0xff) << 56); /////89 is attribute
kdebug("1212"); *(unsigned long *)(phys_2_virt(GDT_Table + n + 1)) = (((unsigned long)addr >> 32) & 0xffffffff) | 0;
*(unsigned long *)(phys_2_virt(GDT_Table) + n + 1) = (((unsigned long)addr >> 32) & 0xffffffff) | 0;
} }
/** /**
@ -160,6 +159,11 @@ void set_system_trap_gate(unsigned int n, unsigned char ist, void *addr)
_set_gate(phys_2_virt(IDT_Table + n), 0xEF, ist, addr); // p=1，DPL=3, type=F _set_gate(phys_2_virt(IDT_Table + n), 0xEF, ist, addr); // p=1，DPL=3, type=F
} }
static inline void set_system_intr_gate(unsigned int n,unsigned char ist,void * addr) //int3
{
_set_gate(phys_2_virt(IDT_Table + n) , 0xEE , ist , addr); //P,DPL=3,TYPE=E
}
/** /**
* @brief 初始化TSS表的内容 * @brief 初始化TSS表的内容
* *

50
kernel/exception/irq.c
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@ -46,15 +46,14 @@
// 构造中断entry // 构造中断entry
// 为了复用返回函数的代码，需要压入一个错误码0 // 为了复用返回函数的代码，需要压入一个错误码0
#define Build_IRQ(number) \ #define Build_IRQ(number) \
void IRQ_NAME(number); \ void IRQ_NAME(number); \
__asm__(SYMBOL_NAME_STR(IRQ) #number "interrupt: \n\t" \ __asm__(SYMBOL_NAME_STR(IRQ) #number "interrupt: \n\t" \
"pushq $0x00 \n\t" \ "pushq $0x00 \n\t" SAVE_ALL_REGS \
SAVE_ALL_REGS \ "movq %rsp, %rdi \n\t" \
"movq %rsp, %rdi \n\t" \
"leaq ret_from_intr(%rip), %rax \n\t" \ "leaq ret_from_intr(%rip), %rax \n\t" \
"pushq %rax \n\t" \ "pushq %rax \n\t" \
"movq $"#number", %rsi \n\t" \ "movq $" #number ", %rsi \n\t" \
"jmp do_IRQ \n\t"); "jmp do_IRQ \n\t");
// 构造中断入口 // 构造中断入口
@ -112,22 +111,23 @@ void (*interrupt_table[24])(void) =
IRQ0x37interrupt, IRQ0x37interrupt,
}; };
/** /**
* @brief 声明10个IPI消息处理程序，向量号从200(0xc8)开始 * @brief 声明10个IPI消息处理程序，向量号从200(0xc8)开始
* *
*/ */
Build_IRQ(0xc8) /*
Build_IRQ(0xc9) */
Build_IRQ(0xca) Build_IRQ(0xc8);
Build_IRQ(0xcb) Build_IRQ(0xc9);
Build_IRQ(0xcc) Build_IRQ(0xca);
Build_IRQ(0xcd) Build_IRQ(0xcb);
Build_IRQ(0xce) Build_IRQ(0xcc);
Build_IRQ(0xcf) Build_IRQ(0xcd);
Build_IRQ(0xd0) Build_IRQ(0xce);
Build_IRQ(0xd1) Build_IRQ(0xcf);
Build_IRQ(0xd0);
Build_IRQ(0xd1);
// 初始化IPI中断服务程序数组 // 初始化IPI中断服务程序数组
void (*SMP_interrupt_table[SMP_IRQ_NUM])(void) = void (*SMP_interrupt_table[SMP_IRQ_NUM])(void) =
@ -189,7 +189,7 @@ int irq_unregister(ul irq_num)
p->parameter = NULL; p->parameter = NULL;
p->flags = 0; p->flags = 0;
p->handler = NULL; p->handler = NULL;
return 0; return 0;
} }
@ -203,10 +203,8 @@ void irq_init()
#else #else
apic_init(); apic_init();
kdebug("interrupt_desc=%#018lx",(void*)interrupt_desc);
kdebug("irq_init()=%#018lx",(void*)irq_init); memset((void *)interrupt_desc, 0, sizeof(irq_desc_t) * IRQ_NUM);
memset((void*)interrupt_desc, 0, sizeof(irq_desc_t) * IRQ_NUM);
#endif #endif
} }

112
kernel/exception/trap.c
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@ -3,63 +3,13 @@
#include "../process/ptrace.h" #include "../process/ptrace.h"
#include "../common/kprint.h" #include "../common/kprint.h"
void sys_vector_init()
{
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
/*
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);
*/
}
// 0 #DE 除法错误 // 0 #DE 除法错误
void do_divide_error(struct pt_regs *regs, unsigned long error_code) void do_divide_error(struct pt_regs *regs, unsigned long error_code)
{ {
kerror("do_divide_error(0)"); //kerror("do_divide_error(0)");
//kerror("do_divide_error(0),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip); kerror("do_divide_error(0),\tError Code:%#18lx,\tRSP:%#18lx,\tRIP:%#18lx\n", error_code, regs->rsp, regs->rip);
while (1) while (1)
; ;
@ -328,4 +278,60 @@ void do_virtualization_exception(struct pt_regs *regs, unsigned long error_code)
; ;
} }
// 21-21 Intel保留，请勿使用 // 21-21 Intel保留，请勿使用
void sys_vector_init()
{
kdebug("do_divide_error=%#018lx", do_divide_error);
kdebug("&do_divide_error=%#018lx", &do_divide_error);
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
/*
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);
*/
}

4
kernel/exception/trap.h
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@ -16,7 +16,7 @@
* @brief 初始化系统中断表 * @brief 初始化系统中断表
* *
*/ */
void sys_vector_init();
//除法错误 //除法错误
void divide_error(); void divide_error();
@ -47,3 +47,5 @@ void alignment_check();
void machine_check(); void machine_check();
void SIMD_exception(); void SIMD_exception();
void virtualization_exception(); void virtualization_exception();
void sys_vector_init();

4
kernel/main.c
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@ -179,7 +179,7 @@ void system_initialize()
printk_init(8, 16); printk_init(8, 16);
kinfo("Kernel Starting..."); kinfo("Kernel Starting...");
// 重新加载gdt和idt // 重新加载gdt和idt
ul tss_item_addr = (ul)phys_2_virt(0x7c00); ul tss_item_addr = (ul)phys_2_virt(0x7c00);
kdebug("TSS64_Table=%#018lx", (void *)TSS64_Table); kdebug("TSS64_Table=%#018lx", (void *)TSS64_Table);
kdebug("&TSS64_Table=%#018lx", (void *)&TSS64_Table); kdebug("&TSS64_Table=%#018lx", (void *)&TSS64_Table);
@ -207,7 +207,7 @@ void system_initialize()
irq_init(); irq_init();
softirq_init(); softirq_init();
// 先初始化系统调用模块 // 先初始化系统调用模块
syscall_init(); syscall_init();
// 再初始化进程模块。顺序不能调转 // 再初始化进程模块。顺序不能调转