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增加一个从c语言使用x86_64中sysret指令的接口

This commit is contained in:
pointer-to-bios 2024-02-18 03:54:48 +08:00
parent 5bd549328f
commit 0613dadeaf
2 changed files with 7 additions and 0 deletions
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3
src/kernel/arch/x86_64/entry.s
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@ -26,6 +26,9 @@ init64:
lea rax, [systemcall_procedure] lea rax, [systemcall_procedure]
wrmsr wrmsr
; 加载中断相关寄存器
; 需要加载寄存器IA32_INTERRUPT_SSP_TABLE
jmp kmain jmp kmain
section .multiboot2 align=8 section .multiboot2 align=8

4
src/kernel/arch/x86_64/syscall_x86_64.s
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@ -50,6 +50,10 @@ set_kernel_stack_cache:
pop rax pop rax
ret ret
; void return_from_systemcall()
return_from_systemcall:
sysret
save_kernel_stack: save_kernel_stack:
endbr64 endbr64
lea rbx, [kernel_stack_cache] lea rbx, [kernel_stack_cache]