fixed warnings from trap.c

src/inc/proto.h

@@ -66,7 +66,7 @@ uint time();
 void timer_init();
 
 // kern/syscall.c
-void do_syscall();
+int do_syscall(struct trap* tf);
 void ltr(uint n);
 void lldt(uint n);
 void ljmp(ushort seg, uint offset);
@@ -77,7 +77,10 @@ int upush_argv(uint *esp, char **tmp);
 int do_exec(char *path, char **argv);
 
 // kern/signal.c
+int issig();
+void psig();
 int sigsend(int pid, int n, int priv);
+int sigsend_g(int pgrp, int n, int priv);
 int do_kill(int pid, int sig);
 int do_signal(int sig, void (*ufunc)(int));
 int do_sigaction(int sig, struct sigaction *sa, struct sigaction *old_sa);

src/kern/sysent.c

@@ -89,7 +89,7 @@ int syserr(uint err){
 
 /* common handlers for all syscalls, if an syserr raised,
  * returns a negative number: 0 - cu->p_error. */
-void do_syscall(struct trap *tf){
+int do_syscall(struct trap *tf){
     int ret;
     int (*func)(struct trap *tf);
 
@@ -107,4 +107,5 @@ void do_syscall(struct trap *tf){
         tf->eax = 0 - cu->p_error;
     else
         tf->eax = ret;
+    return 0;
 }

src/kern/trap.c

@@ -12,9 +12,9 @@ struct idt_desc    idt_desc;
 
 // handlers to each int_no
 // which inited as 0
-static uint hwint_routines[256] = {0, }; 
+static void* hwint_routines[256] = {0, }; 
 
-static char *fault_str[] = {
+static char *trap_str[] = {
     "Division By Zero",
     "Debug",
     "Non Maskable Interrupt",
@@ -200,14 +200,15 @@ void dump_tf(struct trap *tf){
     printk("cr2 = %x, ", cr2);
     asm("mov %%ss, %%eax":"=a"(kern_ss));
     printk("kern_ss = %x\n", kern_ss);
+    printk("trap_str: %s", trap_str[tf->int_no]);
 }
 
 /***********************************************************************************/
 
 void idt_init(){
     // init idt_desc
     idt_desc.limit = (sizeof(struct gate_desc) * 256) - 1;
-    idt_desc.base = &idt;
+    idt_desc.base = (uint)&idt;
     // init irq
     irq_init();
     // load intr vectors and lidt