X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/fa57b4a05aa12d594f40e0894e0ac6f810a7095c..45e1f8b055043e54be35462852ab6649d634da7c:/lunaix-os/kernel/process/signal.c

diff --git a/lunaix-os/kernel/process/signal.c b/lunaix-os/kernel/process/signal.c
index 9a9a349..9e46976 100644
--- a/lunaix-os/kernel/process/signal.c
+++ b/lunaix-os/kernel/process/signal.c
@@ -1,6 +1,3 @@
-#include <klibc/string.h>
-#include <lunaix/lunistd.h>
-#include <lunaix/lxsignal.h>
 #include <lunaix/process.h>
 #include <lunaix/sched.h>
 #include <lunaix/signal.h>
@@ -8,8 +5,13 @@
 #include <lunaix/status.h>
 #include <lunaix/syscall.h>
 
+#include <klibc/string.h>
+
 extern struct scheduler sched_ctx; /* kernel/sched.c */
 
+extern void
+_exit(int status);
+
 void __USER__
 default_sighandler_term(int signum)
 {
@@ -18,12 +20,12 @@ default_sighandler_term(int signum)
 
 void* default_handlers[_SIG_NUM] = {
     // TODO: 添加默认handler
-    [_SIGINT] = default_sighandler_term,  [_SIGTERM] = default_sighandler_term,
-    [_SIGKILL] = default_sighandler_term, [_SIGSEGV] = default_sighandler_term,
     [_SIGINT] = default_sighandler_term,
+    [_SIGTERM] = default_sighandler_term,
+    [_SIGKILL] = default_sighandler_term,
+    [_SIGSEGV] = default_sighandler_term,
 };
 
-volatile struct proc_sigstate __temp_save;
 // Referenced in kernel/asm/x86/interrupt.S
 void*
 signal_dispatch()
@@ -44,13 +46,17 @@ signal_dispatch()
         return 0;
     }
 
+    // TODO: SIG{INT|TERM|KILL|SEGV} should have highest priority.
+    //       Terminate the process right here if any of unmaskable signal is
+    //       set.
+
     if (!__current->sig_handler[sig_selected] &&
         !default_handlers[sig_selected]) {
         // 如果该信号没有handler，则忽略
         return 0;
     }
 
-    uintptr_t ustack = __current->ustack_top & ~0xf;
+    ptr_t ustack = __current->ustack_top & ~0xf;
 
     if ((int)(ustack - USTACK_END) < (int)sizeof(struct proc_sig)) {
         // 用户栈没有空间存放信号上下文
@@ -80,6 +86,7 @@ signal_dispatch()
 
         解决办法就是先吧intr_ctx拷贝到一个静态分配的区域里，然后再注入到用户栈。
     */
+    static volatile struct proc_sigstate __temp_save;
     __temp_save.proc_regs = __current->intr_ctx;
     memcpy(__temp_save.fxstate, __current->fxstate, 512);
 
@@ -146,6 +153,9 @@ __DEFINE_LXSYSCALL1(int, sigreturn, struct proc_sig, *sig_ctx)
     __current->flags &= ~PROC_FINPAUSE;
     __SIGCLEAR(__current->sig_inprogress, sig_ctx->sig_num);
     schedule();
+
+    // never reach!
+    return 0;
 }
 
 __DEFINE_LXSYSCALL3(int,