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🐛 修复空指针错误的问题

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This commit is contained in:
fslongjin 2022-04-25 16:13:52 +08:00
parent dee231d9b8
commit e03cdea153
3 changed files with 13 additions and 9 deletions
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2
kernel/exception/irq.c
View File

@ -11,6 +11,8 @@
#include "../common/printk.h"
#include "gate.h"
// 保存函数调用现场的寄存器
#define SAVE_ALL_REGS \
"cld; \n\t" \

4
kernel/exception/irq.h
View File

@ -126,10 +126,10 @@ typedef struct
} irq_desc_t;
#define IRQ_NUM 24
// 这两个表一定要放在这里，否则在HPET初始化后收到中断，会产生page fault
irq_desc_t interrupt_desc[IRQ_NUM] = {0};
irq_desc_t SMP_IPI_desc[SMP_IRQ_NUM];
irq_desc_t SMP_IPI_desc[SMP_IRQ_NUM] = {0};
/**
* @brief 中断注册函数

16
kernel/mm/mm.c
View File

@ -16,10 +16,11 @@ void mm_init()
memory_management_struct.kernel_data_end = (ul)&_edata;
memory_management_struct.kernel_end = (ul)&_end;
struct multiboot_mmap_entry_t *mb2_mem_info;
struct multiboot_mmap_entry_t mb2_mem_info[512];
int count;
multiboot2_iter(multiboot2_get_memory, mb2_mem_info, &count);
multiboot2_iter(multiboot2_get_memory, mb2_mem_info, &count);
for (int i = 0; i < count; ++i)
{
//可用的内存
@ -27,15 +28,15 @@ void mm_init()
Total_Memory += mb2_mem_info->len;
// 保存信息到mms
memory_management_struct.e820[i].BaseAddr = mb2_mem_info->addr;
memory_management_struct.e820[i].Length = mb2_mem_info->len;
memory_management_struct.e820[i].type = mb2_mem_info->type;
memory_management_struct.e820[i].BaseAddr = mb2_mem_info[i].addr;
memory_management_struct.e820[i].Length = mb2_mem_info[i].len;
memory_management_struct.e820[i].type = mb2_mem_info[i].type;
memory_management_struct.len_e820 = i;
++mb2_mem_info;
// 脏数据
if (mb2_mem_info->type > 4 || mb2_mem_info->len == 0 || mb2_mem_info->type < 1)
if (mb2_mem_info[i].type > 4 || mb2_mem_info[i].len == 0 || mb2_mem_info[i].type < 1)
break;
}
printk("[ INFO ] Total amounts of RAM : %ld bytes\n", Total_Memory);
@ -200,6 +201,7 @@ void mm_init()
kinfo("Memory management unit initialize complete!");
flush_tlb();
// 初始化slab内存池
slab_init();