x86: x86 ptrace merge removals

This removes the old separate 64-bit and ia32 ptrace source files.
They are no longer used.

Signed-off-by: Roland McGrath <[e-mail]>
Signed-off-by: Ingo Molnar <[e-mail]>
Signed-off-by: Thomas Gleixner <[e-mail]>

arch/x86/ia32/ptrace32.c

···
-/*
- * 32bit ptrace for x86-64.
- *
- * Copyright 2001,2002 Andi Kleen, SuSE Labs.
- * Some parts copied from arch/i386/kernel/ptrace.c. See that file for earlier
- * copyright.
- *
- * This allows to access 64bit processes too; but there is no way to
- * see the extended register contents.
- */
-
-#include <linux/kernel.h>
-#include <linux/stddef.h>
-#include <linux/sched.h>
-#include <linux/syscalls.h>
-#include <linux/unistd.h>
-#include <linux/mm.h>
-#include <linux/err.h>
-#include <linux/ptrace.h>
-#include <asm/ptrace.h>
-#include <asm/compat.h>
-#include <asm/uaccess.h>
-#include <asm/user32.h>
-#include <asm/user.h>
-#include <asm/errno.h>
-#include <asm/debugreg.h>
-#include <asm/i387.h>
-#include <asm/fpu32.h>
-#include <asm/ia32.h>
-
-/*
- * Determines which flags the user has access to [1 = access, 0 = no access].
- * Prohibits changing ID(21), VIP(20), VIF(19), VM(17), IOPL(12-13), IF(9).
- * Also masks reserved bits (31-22, 15, 5, 3, 1).
- */
-#define FLAG_MASK 0x54dd5UL
-
-#define R32(l,q)							\
-	case offsetof(struct user32, regs.l):				\
-		regs->q = val; break;
-
-static int putreg32(struct task_struct *child, unsigned regno, u32 val)
-{
-	struct pt_regs *regs = task_pt_regs(child);
-
-	switch (regno) {
-	case offsetof(struct user32, regs.fs):
-		if (val && (val & 3) != 3)
-			return -EIO;
-		child->thread.fsindex = val & 0xffff;
-		if (child == current)
-			loadsegment(fs, child->thread.fsindex);
-		break;
-	case offsetof(struct user32, regs.gs):
-		if (val && (val & 3) != 3)
-			return -EIO;
-		child->thread.gsindex = val & 0xffff;
-		if (child == current)
-			load_gs_index(child->thread.gsindex);
-		break;
-	case offsetof(struct user32, regs.ds):
-		if (val && (val & 3) != 3)
-			return -EIO;
-		child->thread.ds = val & 0xffff;
-		if (child == current)
-			loadsegment(ds, child->thread.ds);
-		break;
-	case offsetof(struct user32, regs.es):
-		child->thread.es = val & 0xffff;
-		if (child == current)
-			loadsegment(es, child->thread.ds);
-		break;
-	case offsetof(struct user32, regs.ss):
-		if ((val & 3) != 3)
-			return -EIO;
-		regs->ss = val & 0xffff;
-		break;
-	case offsetof(struct user32, regs.cs):
-		if ((val & 3) != 3)
-			return -EIO;
-		regs->cs = val & 0xffff;
-		break;
-
-	R32(ebx, bx);
-	R32(ecx, cx);
-	R32(edx, dx);
-	R32(edi, di);
-	R32(esi, si);
-	R32(ebp, bp);
-	R32(eax, ax);
-	R32(orig_eax, orig_ax);
-	R32(eip, ip);
-	R32(esp, sp);
-
-	case offsetof(struct user32, regs.eflags):
-		val &= FLAG_MASK;
-		/*
-		 * If the user value contains TF, mark that
-		 * it was not "us" (the debugger) that set it.
-		 * If not, make sure it stays set if we had.
-		 */
-		if (val & X86_EFLAGS_TF)
-			clear_tsk_thread_flag(child, TIF_FORCED_TF);
-		else if (test_tsk_thread_flag(child, TIF_FORCED_TF))
-			val |= X86_EFLAGS_TF;
-		regs->flags = val | (regs->flags & ~FLAG_MASK);
-		break;
-
-	case offsetof(struct user32, u_debugreg[0]) ...
-		offsetof(struct user32, u_debugreg[7]):
-		regno -= offsetof(struct user32, u_debugreg[0]);
-		return ptrace_set_debugreg(child, regno / 4, val);
-
-	default:
-		if (regno > sizeof(struct user32) || (regno & 3))
-			return -EIO;
-
-		/*
-		 * Other dummy fields in the virtual user structure
-		 * are ignored
-		 */
-		break;
-	}
-	return 0;
-}
-
-#undef R32
-
-#define R32(l,q)							\
-	case offsetof(struct user32, regs.l):				\
-		*val = regs->q; break
-
-static int getreg32(struct task_struct *child, unsigned regno, u32 *val)
-{
-	struct pt_regs *regs = task_pt_regs(child);
-
-	switch (regno) {
-	case offsetof(struct user32, regs.fs):
-		*val = child->thread.fsindex;
-		if (child == current)
-			asm("movl %%fs,%0" : "=r" (*val));
-		break;
-	case offsetof(struct user32, regs.gs):
-		*val = child->thread.gsindex;
-		if (child == current)
-			asm("movl %%gs,%0" : "=r" (*val));
-		break;
-	case offsetof(struct user32, regs.ds):
-		*val = child->thread.ds;
-		if (child == current)
-			asm("movl %%ds,%0" : "=r" (*val));
-		break;
-	case offsetof(struct user32, regs.es):
-		*val = child->thread.es;
-		if (child == current)
-			asm("movl %%es,%0" : "=r" (*val));
-		break;
-
-	R32(cs, cs);
-	R32(ss, ss);
-	R32(ebx, bx);
-	R32(ecx, cx);
-	R32(edx, dx);
-	R32(edi, di);
-	R32(esi, si);
-	R32(ebp, bp);
-	R32(eax, ax);
-	R32(orig_eax, orig_ax);
-	R32(eip, ip);
-	R32(esp, sp);
-
-	case offsetof(struct user32, regs.eflags):
-		/*
-		 * If the debugger set TF, hide it from the readout.
-		 */
-		*val = regs->flags;
-		if (test_tsk_thread_flag(child, TIF_FORCED_TF))
-			*val &= ~X86_EFLAGS_TF;
-		break;
-
-	case offsetof(struct user32, u_debugreg[0]) ...
-		offsetof(struct user32, u_debugreg[7]):
-		regno -= offsetof(struct user32, u_debugreg[0]);
-		*val = ptrace_get_debugreg(child, regno / 4);
-		break;
-
-	default:
-		if (regno > sizeof(struct user32) || (regno & 3))
-			return -EIO;
-
-		/*
-		 * Other dummy fields in the virtual user structure
-		 * are ignored
-		 */
-		*val = 0;
-		break;
-	}
-	return 0;
-}
-
-#undef R32
-
-static long ptrace32_siginfo(unsigned request, u32 pid, u32 addr, u32 data)
-{
-	siginfo_t __user *si = compat_alloc_user_space(sizeof(siginfo_t));
-	compat_siginfo_t __user *si32 = compat_ptr(data);
-	siginfo_t ssi;
-	int ret;
-
-	if (request == PTRACE_SETSIGINFO) {
-		memset(&ssi, 0, sizeof(siginfo_t));
-		ret = copy_siginfo_from_user32(&ssi, si32);
-		if (ret)
-			return ret;
-		if (copy_to_user(si, &ssi, sizeof(siginfo_t)))
-			return -EFAULT;
-	}
-	ret = sys_ptrace(request, pid, addr, (unsigned long)si);
-	if (ret)
-		return ret;
-	if (request == PTRACE_GETSIGINFO) {
-		if (copy_from_user(&ssi, si, sizeof(siginfo_t)))
-			return -EFAULT;
-		ret = copy_siginfo_to_user32(si32, &ssi);
-	}
-	return ret;
-}
-
-asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data)
-{
-	struct task_struct *child;
-	struct pt_regs *childregs;
-	void __user *datap = compat_ptr(data);
-	int ret;
-	__u32 val;
-
-	switch (request) {
-	case PTRACE_TRACEME:
-	case PTRACE_ATTACH:
-	case PTRACE_KILL:
-	case PTRACE_CONT:
-	case PTRACE_SINGLESTEP:
-	case PTRACE_SINGLEBLOCK:
-	case PTRACE_DETACH:
-	case PTRACE_SYSCALL:
-	case PTRACE_OLDSETOPTIONS:
-	case PTRACE_SETOPTIONS:
-	case PTRACE_SET_THREAD_AREA:
-	case PTRACE_GET_THREAD_AREA:
-		return sys_ptrace(request, pid, addr, data);
-
-	default:
-		return -EINVAL;
-
-	case PTRACE_PEEKTEXT:
-	case PTRACE_PEEKDATA:
-	case PTRACE_POKEDATA:
-	case PTRACE_POKETEXT:
-	case PTRACE_POKEUSR:
-	case PTRACE_PEEKUSR:
-	case PTRACE_GETREGS:
-	case PTRACE_SETREGS:
-	case PTRACE_SETFPREGS:
-	case PTRACE_GETFPREGS:
-	case PTRACE_SETFPXREGS:
-	case PTRACE_GETFPXREGS:
-	case PTRACE_GETEVENTMSG:
-		break;
-
-	case PTRACE_SETSIGINFO:
-	case PTRACE_GETSIGINFO:
-		return ptrace32_siginfo(request, pid, addr, data);
-	}
-
-	child = ptrace_get_task_struct(pid);
-	if (IS_ERR(child))
-		return PTR_ERR(child);
-
-	ret = ptrace_check_attach(child, request == PTRACE_KILL);
-	if (ret < 0)
-		goto out;
-
-	childregs = task_pt_regs(child);
-
-	switch (request) {
-	case PTRACE_PEEKDATA:
-	case PTRACE_PEEKTEXT:
-		ret = 0;
-		if (access_process_vm(child, addr, &val, sizeof(u32), 0) !=
-		    sizeof(u32))
-			ret = -EIO;
-		else
-			ret = put_user(val, (unsigned int __user *)datap);
-		break;
-
-	case PTRACE_POKEDATA:
-	case PTRACE_POKETEXT:
-		ret = 0;
-		if (access_process_vm(child, addr, &data, sizeof(u32), 1) !=
-		    sizeof(u32))
-			ret = -EIO;
-		break;
-
-	case PTRACE_PEEKUSR:
-		ret = getreg32(child, addr, &val);
-		if (ret == 0)
-			ret = put_user(val, (__u32 __user *)datap);
-		break;
-
-	case PTRACE_POKEUSR:
-		ret = putreg32(child, addr, data);
-		break;
-
-	case PTRACE_GETREGS: { /* Get all gp regs from the child. */
-		int i;
-
-		if (!access_ok(VERIFY_WRITE, datap, 16*4)) {
-			ret = -EIO;
-			break;
-		}
-		ret = 0;
-		for (i = 0; i <= 16*4; i += sizeof(__u32)) {
-			getreg32(child, i, &val);
-			ret |= __put_user(val, (u32 __user *)datap);
-			datap += sizeof(u32);
-		}
-		break;
-	}
-
-	case PTRACE_SETREGS: { /* Set all gp regs in the child. */
-		unsigned long tmp;
-		int i;
-
-		if (!access_ok(VERIFY_READ, datap, 16*4)) {
-			ret = -EIO;
-			break;
-		}
-		ret = 0;
-		for (i = 0; i <= 16*4; i += sizeof(u32)) {
-			ret |= __get_user(tmp, (u32 __user *)datap);
-			putreg32(child, i, tmp);
-			datap += sizeof(u32);
-		}
-		break;
-	}
-
-	case PTRACE_GETFPREGS:
-		ret = -EIO;
-		if (!access_ok(VERIFY_READ, compat_ptr(data),
-			       sizeof(struct user_i387_struct)))
-			break;
-		save_i387_ia32(child, datap, childregs, 1);
-		ret = 0;
-			break;
-
-	case PTRACE_SETFPREGS:
-		ret = -EIO;
-		if (!access_ok(VERIFY_WRITE, datap,
-			       sizeof(struct user_i387_struct)))
-			break;
-		ret = 0;
-		/* don't check EFAULT to be bug-to-bug compatible to i386 */
-		restore_i387_ia32(child, datap, 1);
-		break;
-
-	case PTRACE_GETFPXREGS: {
-		struct user32_fxsr_struct __user *u = datap;
-
-		init_fpu(child);
-		ret = -EIO;
-		if (!access_ok(VERIFY_WRITE, u, sizeof(*u)))
-			break;
-			ret = -EFAULT;
-		if (__copy_to_user(u, &child->thread.i387.fxsave, sizeof(*u)))
-			break;
-		ret = __put_user(childregs->cs, &u->fcs);
-		ret |= __put_user(child->thread.ds, &u->fos);
-		break;
-	}
-	case PTRACE_SETFPXREGS: {
-		struct user32_fxsr_struct __user *u = datap;
-
-		unlazy_fpu(child);
-		ret = -EIO;
-		if (!access_ok(VERIFY_READ, u, sizeof(*u)))
-			break;
-		/*
-		 * no checking to be bug-to-bug compatible with i386.
-		 * but silence warning
-		 */
-		if (__copy_from_user(&child->thread.i387.fxsave, u, sizeof(*u)))
-			;
-		set_stopped_child_used_math(child);
-		child->thread.i387.fxsave.mxcsr &= mxcsr_feature_mask;
-		ret = 0;
-		break;
-	}
-
-	case PTRACE_GETEVENTMSG:
-		ret = put_user(child->ptrace_message,
-			       (unsigned int __user *)compat_ptr(data));
-		break;
-
-	default:
-		BUG();
-	}
-
- out:
-	put_task_struct(child);
-	return ret;
-}

arch/x86/kernel/ptrace_64.c

···
-/* By Ross Biro 1/23/92 */
-/*
- * Pentium III FXSR, SSE support
- *	Gareth Hughes <[e-mail]>, May 2000
- *
- * x86-64 port 2000-2002 Andi Kleen
- */
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/errno.h>
-#include <linux/ptrace.h>
-#include <linux/user.h>
-#include <linux/security.h>
-#include <linux/audit.h>
-#include <linux/seccomp.h>
-#include <linux/signal.h>
-
-#include <asm/uaccess.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/processor.h>
-#include <asm/prctl.h>
-#include <asm/i387.h>
-#include <asm/debugreg.h>
-#include <asm/ldt.h>
-#include <asm/desc.h>
-#include <asm/proto.h>
-#include <asm/ia32.h>
-
-/*
- * does not yet catch signals sent when the child dies.
- * in exit.c or in signal.c.
- */
-
-/*
- * Determines which flags the user has access to [1 = access, 0 = no access].
- * Prohibits changing ID(21), VIP(20), VIF(19), VM(17), IOPL(12-13), IF(9).
- * Also masks reserved bits (63-22, 15, 5, 3, 1).
- */
-#define FLAG_MASK 0x54dd5UL
-
-/*
- * Called by kernel/ptrace.c when detaching..
- *
- * Make sure the single step bit is not set.
- */
-void ptrace_disable(struct task_struct *child)
-{
-	user_disable_single_step(child);
-}
-
-static unsigned long *pt_regs_access(struct pt_regs *regs, unsigned long offset)
-{
-	BUILD_BUG_ON(offsetof(struct pt_regs, r15) != 0);
-	return &regs->r15 + (offset / sizeof(regs->r15));
-}
-
-static int putreg(struct task_struct *child,
-	unsigned long regno, unsigned long value)
-{
-	struct pt_regs *regs = task_pt_regs(child);
-	switch (regno) {
-	case offsetof(struct user_regs_struct,fs):
-		if (value && (value & 3) != 3)
-			return -EIO;
-		child->thread.fsindex = value & 0xffff;
-		if (child == current)
-			loadsegment(fs, child->thread.fsindex);
-		return 0;
-	case offsetof(struct user_regs_struct,gs):
-		if (value && (value & 3) != 3)
-			return -EIO;
-		child->thread.gsindex = value & 0xffff;
-		if (child == current)
-			load_gs_index(child->thread.gsindex);
-		return 0;
-	case offsetof(struct user_regs_struct,ds):
-		if (value && (value & 3) != 3)
-			return -EIO;
-		child->thread.ds = value & 0xffff;
-		if (child == current)
-			loadsegment(ds, child->thread.ds);
-		return 0;
-	case offsetof(struct user_regs_struct,es):
-		if (value && (value & 3) != 3)
-			return -EIO;
-		child->thread.es = value & 0xffff;
-		if (child == current)
-			loadsegment(es, child->thread.es);
-		return 0;
-	case offsetof(struct user_regs_struct,ss):
-		if ((value & 3) != 3)
-			return -EIO;
-		value &= 0xffff;
-		return 0;
-	case offsetof(struct user_regs_struct,fs_base):
-		if (value >= TASK_SIZE_OF(child))
-			return -EIO;
-		/*
-		 * When changing the segment base, use do_arch_prctl
-		 * to set either thread.fs or thread.fsindex and the
-		 * corresponding GDT slot.
-		 */
-		if (child->thread.fs != value)
-			return do_arch_prctl(child, ARCH_SET_FS, value);
-		return 0;
-	case offsetof(struct user_regs_struct,gs_base):
-		/*
-		 * Exactly the same here as the %fs handling above.
-		 */
-		if (value >= TASK_SIZE_OF(child))
-			return -EIO;
-		if (child->thread.gs != value)
-			return do_arch_prctl(child, ARCH_SET_GS, value);
-		return 0;
-	case offsetof(struct user_regs_struct,flags):
-		value &= FLAG_MASK;
-		/*
-		 * If the user value contains TF, mark that
-		 * it was not "us" (the debugger) that set it.
-		 * If not, make sure it stays set if we had.
-		 */
-		if (value & X86_EFLAGS_TF)
-			clear_tsk_thread_flag(child, TIF_FORCED_TF);
-		else if (test_tsk_thread_flag(child, TIF_FORCED_TF))
-			value |= X86_EFLAGS_TF;
-		value |= regs->flags & ~FLAG_MASK;
-		break;
-	case offsetof(struct user_regs_struct,cs):
-		if ((value & 3) != 3)
-			return -EIO;
-		value &= 0xffff;
-		break;
-	}
-	*pt_regs_access(regs, regno) = value;
-	return 0;
-}
-
-static unsigned long getreg(struct task_struct *child, unsigned long regno)
-{
-	struct pt_regs *regs = task_pt_regs(child);
-	unsigned long val;
-	unsigned int seg;
-	switch (regno) {
-	case offsetof(struct user_regs_struct, fs):
-		if (child == current) {
-			/* Older gas can't assemble movq %?s,%r?? */
-			asm("movl %%fs,%0" : "=r" (seg));
-			return seg;
-		}
-		return child->thread.fsindex;
-	case offsetof(struct user_regs_struct, gs):
-		if (child == current) {
-			asm("movl %%gs,%0" : "=r" (seg));
-			return seg;
-		}
-		return child->thread.gsindex;
-	case offsetof(struct user_regs_struct, ds):
-		if (child == current) {
-			asm("movl %%ds,%0" : "=r" (seg));
-			return seg;
-		}
-		return child->thread.ds;
-	case offsetof(struct user_regs_struct, es):
-		if (child == current) {
-			asm("movl %%es,%0" : "=r" (seg));
-			return seg;
-		}
-		return child->thread.es;
-	case offsetof(struct user_regs_struct, fs_base):
-		/*
-		 * do_arch_prctl may have used a GDT slot instead of
-		 * the MSR.  To userland, it appears the same either
-		 * way, except the %fs segment selector might not be 0.
-		 */
-		if (child->thread.fs != 0)
-			return child->thread.fs;
-		seg = child->thread.fsindex;
-		if (child == current)
-			asm("movl %%fs,%0" : "=r" (seg));
-		if (seg != FS_TLS_SEL)
-			return 0;
-		return get_desc_base(&child->thread.tls_array[FS_TLS]);
-	case offsetof(struct user_regs_struct, gs_base):
-		/*
-		 * Exactly the same here as the %fs handling above.
-		 */
-		if (child->thread.gs != 0)
-			return child->thread.gs;
-		seg = child->thread.gsindex;
-		if (child == current)
-			asm("movl %%gs,%0" : "=r" (seg));
-		if (seg != GS_TLS_SEL)
-			return 0;
-		return get_desc_base(&child->thread.tls_array[GS_TLS]);
-	case offsetof(struct user_regs_struct, flags):
-		/*
-		 * If the debugger set TF, hide it from the readout.
-		 */
-		val = regs->flags;
-		if (test_tsk_thread_flag(child, TIF_IA32))
-			val &= 0xffffffff;
-		if (test_tsk_thread_flag(child, TIF_FORCED_TF))
-			val &= ~X86_EFLAGS_TF;
-		return val;
-	default:
-		val = *pt_regs_access(regs, regno);
-		if (test_tsk_thread_flag(child, TIF_IA32))
-			val &= 0xffffffff;
-		return val;
-	}
-
-}
-
-unsigned long ptrace_get_debugreg(struct task_struct *child, int n)
-{
-	switch (n) {
-	case 0:		return child->thread.debugreg0;
-	case 1:		return child->thread.debugreg1;
-	case 2:		return child->thread.debugreg2;
-	case 3:		return child->thread.debugreg3;
-	case 6:		return child->thread.debugreg6;
-	case 7:		return child->thread.debugreg7;
-	}
-	return 0;
-}
-
-int ptrace_set_debugreg(struct task_struct *child, int n, unsigned long data)
-{
-	int i;
-
-	if (n < 4) {
-		int dsize = test_tsk_thread_flag(child, TIF_IA32) ? 3 : 7;
-		if (unlikely(data >= TASK_SIZE_OF(child) - dsize))
-			return -EIO;
-	}
-
-	switch (n) {
-	case 0:		child->thread.debugreg0 = data; break;
-	case 1:		child->thread.debugreg1 = data; break;
-	case 2:		child->thread.debugreg2 = data; break;
-	case 3:		child->thread.debugreg3 = data; break;
-
-	case 6:
-		if (data >> 32)
-			return -EIO;
-		child->thread.debugreg6 = data;
-		break;
-
-	case 7:
-		/*
-		 * See ptrace_32.c for an explanation of this awkward check.
-		 */
-		data &= ~DR_CONTROL_RESERVED;
-		for (i = 0; i < 4; i++)
-			if ((0x5554 >> ((data >> (16 + 4*i)) & 0xf)) & 1)
-				return -EIO;
-		child->thread.debugreg7 = data;
-		if (data)
-			set_tsk_thread_flag(child, TIF_DEBUG);
-		else
-			clear_tsk_thread_flag(child, TIF_DEBUG);
-		break;
-	}
-
-	return 0;
-}
-
-long arch_ptrace(struct task_struct *child, long request, long addr, long data)
-{
-	long ret;
-	unsigned ui;
-
-	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:
-		ret = generic_ptrace_peekdata(child, addr, data);
-		break;
-
-	/* read the word at location addr in the USER area. */
-	case PTRACE_PEEKUSR: {
-		unsigned long tmp;
-
-		ret = -EIO;
-		if ((addr & 7) ||
-		    addr > sizeof(struct user) - 7)
-			break;
-
-		tmp = 0;
-		if (addr < sizeof(struct user_regs_struct))
-			tmp = getreg(child, addr);
-		else if (addr >= offsetof(struct user, u_debugreg[0])) {
-			addr -= offsetof(struct user, u_debugreg[0]);
-			tmp = ptrace_get_debugreg(child, addr / sizeof(long));
-		}
-
-		ret = put_user(tmp,(unsigned long __user *) 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 = generic_ptrace_pokedata(child, addr, data);
-		break;
-
-	case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
-		ret = -EIO;
-		if ((addr & 7) ||
-		    addr > sizeof(struct user) - 7)
-			break;
-
-		if (addr < sizeof(struct user_regs_struct))
-			ret = putreg(child, addr, data);
-		else if (addr >= offsetof(struct user, u_debugreg[0])) {
-			addr -= offsetof(struct user, u_debugreg[0]);
-			ret = ptrace_set_debugreg(child,
-						  addr / sizeof(long), data);
-		}
-		break;
-
-#ifdef CONFIG_IA32_EMULATION
-		/* This makes only sense with 32bit programs. Allow a
-		   64bit debugger to fully examine them too. Better
-		   don't use it against 64bit processes, use
-		   PTRACE_ARCH_PRCTL instead. */
-	case PTRACE_GET_THREAD_AREA:
-		if (addr < 0)
-			return -EIO;
-		ret = do_get_thread_area(child, addr,
-					 (struct user_desc __user *) data);
-
-		break;
-	case PTRACE_SET_THREAD_AREA:
-		if (addr < 0)
-			return -EIO;
-		ret = do_set_thread_area(child, addr,
-					 (struct user_desc __user *) data, 0);
-		break;
-#endif
-		/* normal 64bit interface to access TLS data.
-		   Works just like arch_prctl, except that the arguments
-		   are reversed. */
-	case PTRACE_ARCH_PRCTL:
-		ret = do_arch_prctl(child, data, addr);
-		break;
-
-	case PTRACE_GETREGS: { /* Get all gp regs from the child. */
-	  	if (!access_ok(VERIFY_WRITE, (unsigned __user *)data,
-			       sizeof(struct user_regs_struct))) {
-			ret = -EIO;
-			break;
-		}
-		ret = 0;
-		for (ui = 0; ui < sizeof(struct user_regs_struct); ui += sizeof(long)) {
-			ret |= __put_user(getreg(child, ui),(unsigned long __user *) data);
-			data += sizeof(long);
-		}
-		break;
-	}
-
-	case PTRACE_SETREGS: { /* Set all gp regs in the child. */
-		unsigned long tmp;
-	  	if (!access_ok(VERIFY_READ, (unsigned __user *)data,
-			       sizeof(struct user_regs_struct))) {
-			ret = -EIO;
-			break;
-		}
-		ret = 0;
-		for (ui = 0; ui < sizeof(struct user_regs_struct); ui += sizeof(long)) {
-			ret = __get_user(tmp, (unsigned long __user *) data);
-			if (ret)
-				break;
-			ret = putreg(child, ui, tmp);
-			if (ret)
-				break;
-			data += sizeof(long);
-		}
-		break;
-	}
-
-	case PTRACE_GETFPREGS: { /* Get the child extended FPU state. */
-		if (!access_ok(VERIFY_WRITE, (unsigned __user *)data,
-			       sizeof(struct user_i387_struct))) {
-			ret = -EIO;
-			break;
-		}
-		ret = get_fpregs((struct user_i387_struct __user *)data, child);
-		break;
-	}
-
-	case PTRACE_SETFPREGS: { /* Set the child extended FPU state. */
-		if (!access_ok(VERIFY_READ, (unsigned __user *)data,
-			       sizeof(struct user_i387_struct))) {
-			ret = -EIO;
-			break;
-		}
-		set_stopped_child_used_math(child);
-		ret = set_fpregs(child, (struct user_i387_struct __user *)data);
-		break;
-	}
-
-	default:
-		ret = ptrace_request(child, request, addr, data);
-		break;
-	}
-	return ret;
-}
-
-static void syscall_trace(struct pt_regs *regs)
-{
-
-#if 0
-	printk("trace %s ip %lx sp %lx ax %d origrax %d caller %lx tiflags %x ptrace %x\n",
-	       current->comm,
-	       regs->ip, regs->sp, regs->ax, regs->orig_ax, __builtin_return_address(0),
-	       current_thread_info()->flags, current->ptrace);
-#endif
-
-	ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
-				? 0x80 : 0));
-	/*
-	 * this isn't the same as continuing with a signal, but it will do
-	 * for normal use.  strace only continues with a signal if the
-	 * stopping signal is not SIGTRAP.  -brl
-	 */
-	if (current->exit_code) {
-		send_sig(current->exit_code, current, 1);
-		current->exit_code = 0;
-	}
-}
-
-asmlinkage void syscall_trace_enter(struct pt_regs *regs)
-{
-	/* do the secure computing check first */
-	secure_computing(regs->orig_ax);
-
-	if (test_thread_flag(TIF_SYSCALL_TRACE)
-	    && (current->ptrace & PT_PTRACED))
-		syscall_trace(regs);
-
-	if (unlikely(current->audit_context)) {
-		if (test_thread_flag(TIF_IA32)) {
-			audit_syscall_entry(AUDIT_ARCH_I386,
-					    regs->orig_ax,
-					    regs->bx, regs->cx,
-					    regs->dx, regs->si);
-		} else {
-			audit_syscall_entry(AUDIT_ARCH_X86_64,
-					    regs->orig_ax,
-					    regs->di, regs->si,
-					    regs->dx, regs->r10);
-		}
-	}
-}
-
-asmlinkage void syscall_trace_leave(struct pt_regs *regs)
-{
-	if (unlikely(current->audit_context))
-		audit_syscall_exit(AUDITSC_RESULT(regs->ax), regs->ax);
-
-	if ((test_thread_flag(TIF_SYSCALL_TRACE)
-	     || test_thread_flag(TIF_SINGLESTEP))
-	    && (current->ptrace & PT_PTRACED))
-		syscall_trace(regs);
-}