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) 
} 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) 
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;}
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/b3319f50acbe3a26c258cdd899b9baa2e5e94efc/ptrace.c/buggy/arch/m68k/kernel/ptrace.c