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Feat: POSIX signal

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This commit is contained in:
Yi-Ting Shih
2025-05-04 20:38:25 +08:00
parent 8d1045f20d
commit d31f5e02fe
9 changed files with 171 additions and 33 deletions
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46
kernel/lib/syscall.c
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@@ -4,6 +4,7 @@
#include <thread.h>
#include <process.h>
#include <mbox.h>
#include <exec.h>
void syscall_handler(trapframe_t *regs)
{
@@ -27,13 +28,22 @@ void syscall_handler(trapframe_t *regs)
regs->x0 = sys_fork();
break;
case 5: // void exit(int32_t status)
sys_exit((int)regs->x0);
sys_exit((int32_t)regs->x0);
break;
case 6: // int32_t mbox_call(uint8_t ch, uint32_t *mbox)
regs->x0 = sys_mbox_call((uint8_t)regs->x0, (uint32_t *)regs->x1);
break;
case 7: // void kill(int32_t pid)
sys_kill((int)regs->x0);
case 7: // void kill_by_id(int32_t pid)
sys_kill_by_id((int32_t)regs->x0);
break;
case 8: // void signal(int32_t SIGNAL, signal_handler_t handler)
sys_signal((int32_t)regs->x0, (signal_handler_t)regs->x1);
break;
case 9: // void kill(int32_t pid, int32_t SIGNAL)
sys_kill((int32_t)regs->x0, (int32_t)regs->x1);
break;
case 10: // void sigreturn(void)
sys_sigreturn();
break;
default:
LOG("unsupported syscall"); ERROR(regs->x8);
@@ -74,6 +84,34 @@ void sys_exit(int32_t status)
int32_t sys_mbox_call(uint8_t ch, uint32_t *mbox)
{ return mbox_call(ch, mbox); }
void sys_kill(int32_t pid)
void sys_kill_by_id(int32_t pid)
{
if (!global_processes || global_processes->size <= (size_t)pid) {
LOG("Process not exist"); INFOR(pid);
return;
}
process_t *process = VEC_AT(process_t, global_processes, pid);
process->th->status = THREAD_STATUS_ZOMBIE;
LOG("Process killed"); INFOR(pid);
}
void sys_signal(int32_t SIGNAL, signal_handler_t handler)
{
thread_t *th = get_current();
th->process->sighandlers[SIGNAL] = handler;
LOG(handler); LOG(SIGNAL); DEBUG_SIGNAL("registered");
}
void sys_kill(int32_t pid, int32_t SIGNAL)
{
process_t *process = VEC_AT(process_t, global_processes, pid);
process->sigstate[SIGNAL] = true;
}
void sys_sigreturn(void)
{
DEBUG_SIGNAL("sigreturn");
thread_t *th = get_current();
user_exec(th->process->regs);
}