Aren/toaruos
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

kernel: cleanup legacy stuff

Browse Source
This commit is contained in:
K. Lange 2023-11-05 15:25:12 +09:00
parent d88712e956
commit b724489609
1 changed files with 4 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
kernel/arch/x86_64/idt.c
View File

@ -530,30 +530,6 @@ static void _page_fault(struct regs * r) {
send_signal(this_core->current_process->id, SIGSEGV, 1);
}
/**
* @brief Legacy system call entrypoint.
*
* We don't have a non-legacy entrypoint, but this use of
* an interrupt to make syscalls is considered "legacy"
* by the existence of its replacement (SYSCALL/SYSRET).
*
* @param r Interrupt register context, which contains syscall arguments.
* @return Register state after system call, which contains return value.
*/
static struct regs * _syscall_entrypoint(struct regs * r) {
/* syscall_handler will modify r to set return value. */
syscall_handler(r);
/*
* I'm not actually sure if we're still cli'ing in any of the
* syscall handlers, but definitely make sure we're not allowing
* interrupts to remain disabled upon return from a system call.
*/
asm volatile("sti");
return r;
}
/**
* @brief AP-local timer signal.
*
@ -655,7 +631,7 @@ struct regs * isr_handler_inner(struct regs * r) {
/* Local interrupts that make it here. */
case 123: return _local_timer(r);
case 127: return _syscall_entrypoint(r);
case 127: syscall_handler(r); return r;
/* Other interrupts that don't make it here:
* 124: TLB shootdown, we just reload CR3 in the handler.
@ -697,10 +673,10 @@ struct regs * isr_handler(struct regs * r) {
struct regs * syscall_centry(struct regs * r) {
this_core->current_process->time_switch = arch_perf_timer();
struct regs * out = _syscall_entrypoint(r);
syscall_handler(r);
process_check_signals(out);
process_check_signals(r);
update_process_times_on_exit();
return out;
return r;
}