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fslongjin
2022-04-14 19:26:46 +08:00
parent 53c553c730
commit c2d8e88617
7 changed files with 29 additions and 18 deletions
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6
kernel/process/process.h
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@ -211,7 +211,8 @@ struct process_control_block *get_current_pcb()
#define switch_proc(prev, next) \
do \
{ \
__asm__ __volatile__("pushq %%rbp \n\t" \
__asm__ __volatile__("cli \n\t" \
"pushq %%rbp \n\t" \
"pushq %%rax \n\t" \
"movq %%rsp, %0 \n\t" \
"movq %2, %%rsp \n\t" \
@ -222,6 +223,7 @@ struct process_control_block *get_current_pcb()
"1: \n\t" \
"popq %%rax \n\t" \
"popq %%rbp \n\t" \
"sti \n\t" \
: "=m"(prev->thread->rsp), "=m"(prev->thread->rip) \
: "m"(next->thread->rsp), "m"(next->thread->rip), "D"(prev), "S"(next) \
: "memory"); \
@ -249,7 +251,7 @@ unsigned long do_fork(struct pt_regs *regs, unsigned long clone_flags, unsigned
extern unsigned long head_stack_start; // 导出内核层栈基地址（定义在head.S）
extern ul _stack_start;
extern void ret_from_intr(void); // 导出从中断返回的函数（定义在entry.S）
extern void ret_from_intr(void); // 导出从中断返回的函数（定义在entry.S）
extern struct tss_struct initial_tss[MAX_CPU_NUM];
extern struct mm_struct initial_mm;