case PTRACE_GET_DEBUGREG: { ret = -EINVAL; /* We only support one DABR and no IABRS at the moment */ if (addr > 0) break; ret = put_user(child->thread.dabr, (u32 __user *)data); break; }  case PTRACE_SET_DEBUGREG: ret = ptrace_set_debugreg(child, addr, data); break;  
int sys32_ptrace(long request, long pid, unsigned long addr, unsigned long data){	struct task_struct *child;	int ret = -EPERM;	lock_kernel();	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;	}	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 int tmp;		int copied;		copied = access_process_vm(child, addr, &tmp, sizeof(tmp), 0);		ret = -EIO;		if (copied != sizeof(tmp))			break;		ret = put_user(tmp, (u32 __user *)data);		break;	}	/*	 * Read 4 bytes of the other process' storage	 *  data is a pointer specifying where the user wants the	 *	4 bytes copied into	 *  addr is a pointer in the user's storage that contains an 8 byte	 *	address in the other process of the 4 bytes that is to be read	 * (this is run in a 32-bit process looking at a 64-bit process)	 * when I and D space are separate, these will need to be fixed.	 */	case PPC_PTRACE_PEEKTEXT_3264:	case PPC_PTRACE_PEEKDATA_3264: {		u32 tmp;		int copied;		u32 __user * addrOthers;		ret = -EIO;		/* Get the addr in the other process that we want to read */		if (get_user(addrOthers, (u32 __user * __user *)addr) != 0)			break;		copied = access_process_vm(child, (u64)addrOthers, &tmp,				sizeof(tmp), 0);		if (copied != sizeof(tmp))			break;		ret = put_user(tmp, (u32 __user *)data);		break;	}	/* Read a register (specified by ADDR) out of the "user area" */	case PTRACE_PEEKUSR: {		int index;		unsigned long tmp;		ret = -EIO;		/* convert to index and check */		index = (unsigned long) addr >> 2;		if ((addr & 3) || (index > PT_FPSCR32))			break;		if (index < PT_FPR0) {			tmp = get_reg(child, index);		} else {			flush_fp_to_thread(child);			/*			 * the user space code considers the floating point			 * to be an array of unsigned int (32 bits) - the			 * index passed in is based on this assumption.			 */			tmp = ((unsigned int *)child->thread.fpr)[index - PT_FPR0];		}		ret = put_user((unsigned int)tmp, (u32 __user *)data);		break;	}  	/*	 * Read 4 bytes out of the other process' pt_regs area	 *  data is a pointer specifying where the user wants the	 *	4 bytes copied into	 *  addr is the offset into the other process' pt_regs structure	 *	that is to be read	 * (this is run in a 32-bit process looking at a 64-bit process)	 */	case PPC_PTRACE_PEEKUSR_3264: {		u32 index;		u32 reg32bits;		u64 tmp;		u32 numReg;		u32 part;		ret = -EIO;		/* Determine which register the user wants */		index = (u64)addr >> 2;		numReg = index / 2;		/* Determine which part of the register the user wants */		if (index % 2)			part = 1;  /* want the 2nd half of the register (right-most). */		else			part = 0;  /* want the 1st half of the register (left-most). */		/* Validate the input - check to see if address is on the wrong boundary or beyond the end of the user area */		if ((addr & 3) || numReg > PT_FPSCR)			break;		if (numReg >= PT_FPR0) {			flush_fp_to_thread(child);			tmp = ((unsigned long int *)child->thread.fpr)[numReg - PT_FPR0];		} else { /* register within PT_REGS struct */			tmp = get_reg(child, numReg);		} 		reg32bits = ((u32*)&tmp)[part];		ret = put_user(reg32bits, (u32 __user *)data);		break;	}	/* If I and D space are separate, this will have to be fixed. */	case PTRACE_POKETEXT: /* write the word at location addr. */	case PTRACE_POKEDATA: {		unsigned int tmp;		tmp = data;		ret = 0;		if (access_process_vm(child, addr, &tmp, sizeof(tmp), 1)				== sizeof(tmp))			break;		ret = -EIO;		break;	}	/*	 * Write 4 bytes into the other process' storage	 *  data is the 4 bytes that the user wants written	 *  addr is a pointer in the user's storage that contains an	 *	8 byte address in the other process where the 4 bytes	 *	that is to be written	 * (this is run in a 32-bit process looking at a 64-bit process)	 * when I and D space are separate, these will need to be fixed.	 */	case PPC_PTRACE_POKETEXT_3264:	case PPC_PTRACE_POKEDATA_3264: {		u32 tmp = data;		u32 __user * addrOthers;		/* Get the addr in the other process that we want to write into */		ret = -EIO;		if (get_user(addrOthers, (u32 __user * __user *)addr) != 0)			break;		ret = 0;		if (access_process_vm(child, (u64)addrOthers, &tmp,					sizeof(tmp), 1) == sizeof(tmp))			break;		ret = -EIO;		break;	}	/* write the word at location addr in the USER area */	case PTRACE_POKEUSR: {		unsigned long index;		ret = -EIO;		/* convert to index and check */		index = (unsigned long) addr >> 2;		if ((addr & 3) || (index > PT_FPSCR32))			break;		if (index == PT_ORIG_R3)			break;		if (index < PT_FPR0) {			ret = put_reg(child, index, data);		} else {			flush_fp_to_thread(child);			/*			 * the user space code considers the floating point			 * to be an array of unsigned int (32 bits) - the			 * index passed in is based on this assumption.			 */			((unsigned int *)child->thread.fpr)[index - PT_FPR0] = data;			ret = 0;		}		break;	}	/*	 * Write 4 bytes into the other process' pt_regs area	 *  data is the 4 bytes that the user wants written	 *  addr is the offset into the other process' pt_regs structure	 *	that is to be written into	 * (this is run in a 32-bit process looking at a 64-bit process)	 */	case PPC_PTRACE_POKEUSR_3264: {		u32 index;		u32 numReg;		ret = -EIO;		/* Determine which register the user wants */		index = (u64)addr >> 2;		numReg = index / 2;		/*		 * Validate the input - check to see if address is on the		 * wrong boundary or beyond the end of the user area		 */		if ((addr & 3) || (numReg > PT_FPSCR))			break;		/* Insure it is a register we let them change */		if ((numReg == PT_ORIG_R3)				|| ((numReg > PT_CCR) && (numReg < PT_FPR0)))			break;		if (numReg >= PT_FPR0) {			flush_fp_to_thread(child);		}		if (numReg == PT_MSR)			data = (data & MSR_DEBUGCHANGE)				| (child->thread.regs->msr & ~MSR_DEBUGCHANGE);		((u32*)child->thread.regs)[index] = data;		ret = 0;		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;		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;		/* make sure the single step bit is not set. */		clear_single_step(child);		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;		child->exit_code = SIGKILL;		/* make sure the single step bit is not set. */		clear_single_step(child);		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_single_step(child);		child->exit_code = data;		/* give it a chance to run. */		wake_up_process(child);		ret = 0;		break;	}	case PTRACE_DETACH:		ret = ptrace_detach(child, data);		break;	case PPC_PTRACE_GETREGS: { /* Get GPRs 0 - 31. */		int i;		unsigned long *reg = &((unsigned long *)child->thread.regs)[0];		unsigned int __user *tmp = (unsigned int __user *)addr;		for (i = 0; i < 32; i++) {			ret = put_user(*reg, tmp);			if (ret)				break;			reg++;			tmp++;		}		break;	}	case PPC_PTRACE_SETREGS: { /* Set GPRs 0 - 31. */		int i;		unsigned long *reg = &((unsigned long *)child->thread.regs)[0];		unsigned int __user *tmp = (unsigned int __user *)addr;		for (i = 0; i < 32; i++) {			ret = get_user(*reg, tmp);			if (ret)				break;			reg++;			tmp++;		}		break;	}	case PPC_PTRACE_GETFPREGS: { /* Get FPRs 0 - 31. */		int i;		unsigned long *reg = &((unsigned long *)child->thread.fpr)[0];		unsigned int __user *tmp = (unsigned int __user *)addr;		flush_fp_to_thread(child);		for (i = 0; i < 32; i++) {			ret = put_user(*reg, tmp);			if (ret)				break;			reg++;			tmp++;		}		break;	}	case PPC_PTRACE_SETFPREGS: { /* Get FPRs 0 - 31. */		int i;		unsigned long *reg = &((unsigned long *)child->thread.fpr)[0];		unsigned int __user *tmp = (unsigned int __user *)addr;		flush_fp_to_thread(child);		for (i = 0; i < 32; i++) {			ret = get_user(*reg, tmp);			if (ret)				break;			reg++;			tmp++;		}		break;	}	case PTRACE_GETEVENTMSG:		ret = put_user(child->ptrace_message, (unsigned int __user *) data);		break;#ifdef CONFIG_ALTIVEC	case PTRACE_GETVRREGS:		/* Get the child altivec register state. */		flush_altivec_to_thread(child);		ret = get_vrregs((unsigned long __user *)data, child);		break;	case PTRACE_SETVRREGS:		/* Set the child altivec register state. */		flush_altivec_to_thread(child);		ret = set_vrregs(child, (unsigned long __user *)data);		break;#endif	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/fd9648dff6f9797ecc509bcd181706a274dc074d/ptrace32.c/clean/arch/ppc64/kernel/ptrace32.c