powerpc: Move ptrace32.c from arch/ppc64 to arch/powerpc

Also corrected my email address in ptrace.c and updated the comments
at the top of ptrace32.c.

Signed-off-by: Paul Mackerras <paulus@samba.org>

2 files changed, 1 insertions, 450 deletions

diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile
index 19846d78b32..8c9012f0ce6 100644
--- a/arch/ppc64/kernel/Makefile
+++ b/arch/ppc64/kernel/Makefile
@@ -15,7 +15,7 @@ obj-y               +=	irq.o idle.o dma.o \
 			time.o signal.o \
 			align.o bitops.o pacaData.o \
 			udbg.o ioctl32.o \
-			ptrace32.o rtc.o \
+			rtc.o \
 			cpu_setup_power4.o \
 			iommu.o sysfs.o vdso.o pmc.o firmware.o
 obj-y += vdso32/ vdso64/
diff --git a/arch/ppc64/kernel/ptrace32.c b/arch/ppc64/kernel/ptrace32.c
deleted file mode 100644
index 2e1df3ddd9f..00000000000
--- a/arch/ppc64/kernel/ptrace32.c
+++ /dev/null
@@ -1,449 +0,0 @@
-/*
- *  linux/arch/ppc64/kernel/ptrace32.c
- *
- *  PowerPC version
- *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- *
- *  Derived from "arch/m68k/kernel/ptrace.c"
- *  Copyright (C) 1994 by Hamish Macdonald
- *  Taken from linux/kernel/ptrace.c and modified for M680x0.
- *  linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
- *
- * Modified by Cort Dougan (cort@hq.fsmlabs.com)
- * and Paul Mackerras (paulus@linuxcare.com.au).
- *
- * This file is subject to the terms and conditions of the GNU General
- * Public License.  See the file README.legal in the main directory of
- * this archive for more details.
- */
-
-#include <linux/config.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/smp_lock.h>
-#include <linux/errno.h>
-#include <linux/ptrace.h>
-#include <linux/user.h>
-#include <linux/security.h>
-#include <linux/signal.h>
-
-#include <asm/uaccess.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/ptrace-common.h>
-
-/*
- * does not yet catch signals sent when the child dies.
- * in exit.c or in signal.c.
- */
-
-int compat_sys_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_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;
-
-	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;
-}