SUBARCH_PTRACE_SPECIAL(child,request,addr,data) 
SUBARCH_PTRACE_SPECIAL(child,request,addr,data); 
long sys_ptrace(long request, long pid, long addr, long data){	struct task_struct *child;	int i, ret;	lock_kernel();	ret = -EPERM;	if (request == PTRACE_TRACEME) {		/* are we already being traced? */		if (current->ptrace & PT_PTRACED)			goto out;		ret = security_ptrace(current->parent, current);		if (ret) 			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;	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;	}#ifdef SUBACH_PTRACE_SPECIAL        SUBARCH_PTRACE_SPECIAL(child,request,addr,data)#endif	ret = ptrace_check_attach(child, request == PTRACE_KILL);	if (ret < 0)		goto out_tsk;	switch (request) {		/* when I and D space are separate, these will need to be fixed. */	case PTRACE_PEEKTEXT: /* read word at location addr. */ 	case PTRACE_PEEKDATA: {		unsigned long tmp;		int copied;		ret = -EIO;		copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);		if (copied != sizeof(tmp))			break;		ret = put_user(tmp, (unsigned long __user *) data);		break;	}	/* read the word at location addr in the USER area. */        case PTRACE_PEEKUSR:                ret = peek_user(child, addr, data);                break;	/* when I and D space are separate, this will have to be fixed. */	case PTRACE_POKETEXT: /* write the word at location addr. */	case PTRACE_POKEDATA:		ret = -EIO;		if (access_process_vm(child, addr, &data, sizeof(data), 				      1) != sizeof(data))			break;		ret = 0;		break;	case PTRACE_POKEUSR: /* write the word at location addr in the USER area */                ret = poke_user(child, addr, data);                break;	case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */	case PTRACE_CONT: { /* restart after signal. */		ret = -EIO;		if (!valid_signal(data))			break;                set_singlestepping(child, 0);		if (request == PTRACE_SYSCALL) {			set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);		}		else {			clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);		}		child->exit_code = data;		wake_up_process(child);		ret = 0;		break;	}/* * make the child exit.  Best I can do is send it a sigkill.  * perhaps it should be put in the status that it wants to  * exit. */	case PTRACE_KILL: {		ret = 0;		if (child->exit_state == EXIT_ZOMBIE)	/* already dead */			break;                set_singlestepping(child, 0);		child->exit_code = SIGKILL;		wake_up_process(child);		break;	}	case PTRACE_SINGLESTEP: {  /* set the trap flag. */		ret = -EIO;		if (!valid_signal(data))			break;		clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);                set_singlestepping(child, 1);		child->exit_code = data;		/* give it a chance to run. */		wake_up_process(child);		ret = 0;		break;	}	case PTRACE_DETACH:		/* detach a process that was attached. */		ret = ptrace_detach(child, data); 		break;#ifdef PTRACE_GETREGS	case PTRACE_GETREGS: { /* Get all gp regs from the child. */	  	if (!access_ok(VERIFY_WRITE, (unsigned long *)data, 			       MAX_REG_OFFSET)) {			ret = -EIO;			break;		}		for ( i = 0; i < MAX_REG_OFFSET; i += sizeof(long) ) {			__put_user(getreg(child, i),				   (unsigned long __user *) data);			data += sizeof(long);		}		ret = 0;		break;	}#endif#ifdef PTRACE_SETREGS	case PTRACE_SETREGS: { /* Set all gp regs in the child. */		unsigned long tmp = 0;	  	if (!access_ok(VERIFY_READ, (unsigned *)data, 			       MAX_REG_OFFSET)) {			ret = -EIO;			break;		}		for ( i = 0; i < MAX_REG_OFFSET; i += sizeof(long) ) {			__get_user(tmp, (unsigned long __user *) data);			putreg(child, i, tmp);			data += sizeof(long);		}		ret = 0;		break;	}#endif#ifdef PTRACE_GETFPREGS	case PTRACE_GETFPREGS: /* Get the child FPU state. */		ret = get_fpregs(data, child);		break;#endif#ifdef PTRACE_SETFPREGS	case PTRACE_SETFPREGS: /* Set the child FPU state. */	        ret = set_fpregs(data, child);		break;#endif#ifdef PTRACE_GETFPXREGS	case PTRACE_GETFPXREGS: /* Get the child FPU state. */		ret = get_fpxregs(data, child);		break;#endif#ifdef PTRACE_SETFPXREGS	case PTRACE_SETFPXREGS: /* Set the child FPU state. */		ret = set_fpxregs(data, child);		break;#endif	case PTRACE_FAULTINFO: {                /* Take the info from thread->arch->faultinfo,                 * but transfer max. sizeof(struct ptrace_faultinfo).                 * On i386, ptrace_faultinfo is smaller!                 */                ret = copy_to_user((unsigned long __user *) data,                                   &child->thread.arch.faultinfo,                                   sizeof(struct ptrace_faultinfo));		if(ret)			break;		break;	}#ifdef PTRACE_LDT	case PTRACE_LDT: {		struct ptrace_ldt ldt;		if(copy_from_user(&ldt, (unsigned long __user *) data,				  sizeof(ldt))){			ret = -EIO;			break;		}		/* This one is confusing, so just punt and return -EIO for 		 * now		 */		ret = -EIO;		break;	}#endif#ifdef CONFIG_PROC_MM	case PTRACE_SWITCH_MM: {		struct mm_struct *old = child->mm;		struct mm_struct *new = proc_mm_get_mm(data);		if(IS_ERR(new)){			ret = PTR_ERR(new);			break;		}		atomic_inc(&new->mm_users);		child->mm = new;		child->active_mm = new;		mmput(old);		ret = 0;		break;	}#endif	default:		ret = ptrace_request(child, request, addr, data);		break;	} out_tsk:	put_task_struct(child); out:	unlock_kernel();	return ret;}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/ba9950c820e556e39cd26581826b5581a64fb641/ptrace.c/buggy/arch/um/kernel/ptrace.c