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🆕 do_execve函数，跳转至应用层

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This commit is contained in:
fslongjin
2022-02-13 22:41:35 +08:00
parent 781a105d2f
commit 0757e7a3cd
8 changed files with 178 additions and 93 deletions
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48
kernel/common/glib.h
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@ -90,22 +90,6 @@ static inline void list_append(struct List *entry, struct List *node)
list_add(tail, node);
}
void list_add_to_behind(struct List * entry,struct List * new) ////add to entry behind
{
new->next = entry->next;
new->prev = entry;
new->next->prev = new;
entry->next = new;
}
void list_add_to_before(struct List * entry,struct List * new) ////add to entry behind
{
new->next = entry;
entry->prev->next = new;
new->prev = entry->prev;
entry->prev = new;
}
static inline void list_del(struct List *entry)
{
/**
@ -274,7 +258,6 @@ void io_out32(unsigned short port, unsigned int value)
: "memory");
}
/**
* @brief 读取rsp寄存器的值（存储了页目录的基地址）
*
@ -342,4 +325,33 @@ unsigned long *get_rbx()
"movq %%rbx, %0\n\t"
: "=r"(tmp)::"memory");
return tmp;
}
}
// ========= MSR寄存器组操作 =============
/**
* @brief 向msr寄存器组的address处的寄存器写入值value
*
* @param address 地址
* @param value 要写入的值
*/
void wrmsr(ul address, ul value)
{
__asm__ __volatile__("wrmsr \n\t" ::"d"(value >> 32), "a"(value & 0xffffffff), "c"(address)
: "memory");
}
/**
* @brief 从msr寄存器组的address地址处读取值
*
* @param address 地址
* @return ul address处的寄存器的值
*/
ul rdmsr(ul address)
{
unsigned int tmp0, tmp1;
__asm__ __volatile__("rdmsr \n\t"
: "=d"(tmp0), "=a"(tmp1)
: "c"(address)
: "memory");
return ((ul)tmp0 << 32) | tmp1;
}