X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fh8300%2Fkernel%2Fptrace.c;h=0ff6f79b0fedcf240fc56af0e1f8c679fb9db716;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=cdbfe9e5c6056185a621e9f56a6aa6716747beff;hpb=a8e794ca871505c8ea96cc102f4ad555c5231d7f;p=linux-2.6.git

diff --git a/arch/h8300/kernel/ptrace.c b/arch/h8300/kernel/ptrace.c
index cdbfe9e5c..0ff6f79b0 100644
--- a/arch/h8300/kernel/ptrace.c
+++ b/arch/h8300/kernel/ptrace.c
@@ -24,6 +24,7 @@
 #include <linux/ptrace.h>
 #include <linux/user.h>
 #include <linux/config.h>
+#include <linux/signal.h>
 
 #include <asm/uaccess.h>
 #include <asm/page.h>
@@ -56,52 +57,10 @@ void ptrace_disable(struct task_struct *child)
 	h8300_disable_trace(child);
 }
 
-asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
+long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 {
-	struct task_struct *child;
 	int ret;
 
-	lock_kernel();
-	ret = -EPERM;
-	if (request == PTRACE_TRACEME) {
-		/* are we already being traced? */
-		if (current->ptrace & PT_PTRACED)
-			goto out;
-		/* set the ptrace bit in the process flags. */
-		current->ptrace |= PT_PTRACED;
-		ret = 0;
-		goto out;
-	}
-	ret = -ESRCH;
-	read_lock(&tasklist_lock);
-	child = find_task_by_pid(pid);
-	if (child)
-		get_task_struct(child);
-	read_unlock(&tasklist_lock);
-	if (!child)
-		goto out;
-	if (!vx_check(vx_task_xid(child), VX_WATCH|VX_IDENT))
-		goto out_tsk;
-
-	ret = -EPERM;
-	if (pid == 1)		/* you may not mess with init */
-		goto out_tsk;
-
-	if (request == PTRACE_ATTACH) {
-		ret = ptrace_attach(child);
-		goto out_tsk;
-	}
-	ret = -ESRCH;
-	if (!(child->ptrace & PT_PTRACED))
-		goto out_tsk;
-	if (child->state != TASK_STOPPED) {
-		if (request != PTRACE_KILL)
-			goto out_tsk;
-	}
-	ret = ptrace_check_attach(child, request == PTRACE_KILL);
-	if (ret < 0)
-		goto out_tsk;
-
 	switch (request) {
 		case PTRACE_PEEKTEXT: /* read word at location addr. */ 
 		case PTRACE_PEEKDATA: {
@@ -116,20 +75,38 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
 
 	/* read the word at location addr in the USER area. */
 		case PTRACE_PEEKUSR: {
-			unsigned long tmp;
+			unsigned long tmp = 0;
 			
-			if ((addr & 3) || addr < 0 || addr >= sizeof(struct user))
+			if ((addr & 3) || addr < 0 || addr >= sizeof(struct user)) {
 				ret = -EIO;
+				break ;
+			}
 			
-			tmp = 0;  /* Default return condition */
+		        ret = 0;  /* Default return condition */
 			addr = addr >> 2; /* temporary hack. */
+
 			if (addr < H8300_REGS_NO)
 				tmp = h8300_get_reg(child, addr);
 			else {
-				ret = -EIO;
-				break ;
+				switch(addr) {
+				case 49:
+					tmp = child->mm->start_code;
+					break ;
+				case 50:
+					tmp = child->mm->start_data;
+					break ;
+				case 51:
+					tmp = child->mm->end_code;
+					break ;
+				case 52:
+					tmp = child->mm->end_data;
+					break ;
+				default:
+					ret = -EIO;
+				}
 			}
-			ret = put_user(tmp,(unsigned long *) data);
+			if (!ret)
+				ret = put_user(tmp,(unsigned long *) data);
 			break ;
 		}
 
@@ -162,7 +139,7 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
 		case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */
 		case PTRACE_CONT: { /* restart after signal. */
 			ret = -EIO;
-			if ((unsigned long) data >= _NSIG)
+			if (!valid_signal(data))
 				break ;
 			if (request == PTRACE_SYSCALL)
 				set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
@@ -183,7 +160,7 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
 		case PTRACE_KILL: {
 
 			ret = 0;
-			if (child->state == TASK_ZOMBIE) /* already dead */
+			if (child->exit_state == EXIT_ZOMBIE) /* already dead */
 				break;
 			child->exit_code = SIGKILL;
 			h8300_disable_trace(child);
@@ -193,7 +170,7 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
 
 		case PTRACE_SINGLESTEP: {  /* set the trap flag. */
 			ret = -EIO;
-			if ((unsigned long) data > _NSIG)
+			if (!valid_signal(data))
 				break;
 			clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
 			child->exit_code = data;
@@ -241,10 +218,6 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
 			ret = -EIO;
 			break;
 	}
-out_tsk:
-	put_task_struct(child);
-out:
-	unlock_kernel();
 	return ret;
 }
 
@@ -254,10 +227,8 @@ asmlinkage void syscall_trace(void)
 		return;
 	if (!(current->ptrace & PT_PTRACED))
 		return;
-	current->exit_code = SIGTRAP;
-	current->state = TASK_STOPPED;
-	notify_parent(current, SIGCHLD);
-	schedule();
+	ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
+				 ? 0x80 : 0));
 	/*
 	 * this isn't the same as continuing with a signal, but it will do
 	 * for normal use.  strace only continues with a signal if the