case PTRACE_PEEKDATA: { unsigned long tmp; int copied;  copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0); ret = -EIO; if (copied != sizeof(tmp)) break; 
case PTRACE_PEEKDATA: i = access_process_vm(child, addr, &tmp, sizeof(tmp), 0); if (i != sizeof(tmp)) goto out_eio; 
asmlinkage int sys_ptrace(long request, long pid, 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;	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 = 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;		copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);		ret = -EIO;		if (copied != sizeof(tmp))			break;		ret = put_user(tmp, (unsigned long *)data);		break;	}	/* read the word at location addr in the USER area. */	case PTRACE_PEEKUSR: {		unsigned long tmp;		ret = -EIO;		if ((addr & 3) || addr < 0 ||		    addr > sizeof(struct user) - 3)			break;		tmp = 0;  /* Default return condition */		addr = addr >> 2; /* temporary hack. */		ret = -EIO;		if (addr < 19) {			tmp = get_reg(child, addr);			if (addr == PT_SR)				tmp >>= 16;		} else if (addr >= 21 && addr < 49) {			tmp = child->thread.fp[addr - 21];#ifdef CONFIG_M68KFPU_EMU			/* Convert internal fpu reg representation			 * into long double format			 */			if (FPU_IS_EMU && (addr < 45) && !(addr % 3))				tmp = ((tmp & 0xffff0000) << 15) |				      ((tmp & 0x0000ffff) << 16);#endif		} else			break;		ret = put_user(tmp, (unsigned long *)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 = 0;		if (access_process_vm(child, addr, &data, sizeof(data), 1) == sizeof(data))			break;		ret = -EIO;		break;	case PTRACE_POKEUSR:	/* write the word at location addr in the USER area */		ret = -EIO;		if ((addr & 3) || addr < 0 ||		    addr > sizeof(struct user) - 3)			break;		addr = addr >> 2; /* temporary hack. */		if (addr == PT_SR) {			data &= SR_MASK;			data <<= 16;			data |= get_reg(child, PT_SR) & ~(SR_MASK << 16);		}		if (addr < 19) {			if (put_reg(child, addr, data))				break;			ret = 0;			break;		}		if (addr >= 21 && addr < 48) {#ifdef CONFIG_M68KFPU_EMU			/* Convert long double format			 * into internal fpu reg representation			 */			if (FPU_IS_EMU && (addr < 45) && !(addr % 3)) {				data = (unsigned long)data << 15;				data = (data & 0xffff0000) |				       ((data & 0x0000ffff) >> 1);			}#endif			child->thread.fp[addr - 21] = data;			ret = 0;		}		break;	case PTRACE_SYSCALL:	/* continue and stop at next (return from) syscall */	case PTRACE_CONT: {	/* restart after signal. */		long tmp;		ret = -EIO;		if (!valid_signal(data))			break;		if (request == PTRACE_SYSCALL) {			child->thread.work.syscall_trace = ~0;		} else {			child->thread.work.syscall_trace = 0;		}		child->exit_code = data;		/* make sure the single step bit is not set. */		tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);		put_reg(child, PT_SR, tmp);		child->thread.work.delayed_trace = 0;		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: {		long tmp;		ret = 0;		if (child->exit_state == EXIT_ZOMBIE) /* already dead */			break;		child->exit_code = SIGKILL;		/* make sure the single step bit is not set. */		tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);		put_reg(child, PT_SR, tmp);		child->thread.work.delayed_trace = 0;		wake_up_process(child);		break;	}	case PTRACE_SINGLESTEP: {  /* set the trap flag. */		long tmp;		ret = -EIO;		if (!valid_signal(data))			break;		child->thread.work.syscall_trace = 0;		tmp = get_reg(child, PT_SR) | (TRACE_BITS << 16);		put_reg(child, PT_SR, tmp);		child->thread.work.delayed_trace = 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;	case PTRACE_GETREGS: { /* Get all gp regs from the child. */		int i;		unsigned long tmp;		for (i = 0; i < 19; i++) {			tmp = get_reg(child, i);			if (i == PT_SR)				tmp >>= 16;			if (put_user(tmp, (unsigned long *)data)) {				ret = -EFAULT;				break;			}			data += sizeof(long);		}		ret = 0;		break;	}	case PTRACE_SETREGS: { /* Set all gp regs in the child. */		int i;		unsigned long tmp;		for (i = 0; i < 19; i++) {			if (get_user(tmp, (unsigned long *)data)) {				ret = -EFAULT;				break;			}			if (i == PT_SR) {				tmp &= SR_MASK;				tmp <<= 16;				tmp |= get_reg(child, PT_SR) & ~(SR_MASK << 16);			}			put_reg(child, i, tmp);			data += sizeof(long);		}		ret = 0;		break;	}	case PTRACE_GETFPREGS: { /* Get the child FPU state. */		ret = 0;		if (copy_to_user((void *)data, &child->thread.fp,				 sizeof(struct user_m68kfp_struct)))			ret = -EFAULT;		break;	}	case PTRACE_SETFPREGS: { /* Set the child FPU state. */		ret = 0;		if (copy_from_user(&child->thread.fp, (void *)data,				   sizeof(struct user_m68kfp_struct)))			ret = -EFAULT;		break;	}	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/2005/4520/69f447cffb911bb2d9737fa905f6d983ec2aa5d3/ptrace.c/clean/arch/m68k/kernel/ptrace.c