1 files changed, 0 insertions, 316 deletions

diff --git a/arch/tile/kernel/ptrace.c b/arch/tile/kernel/ptrace.c
deleted file mode 100644
index d516d61751c2..000000000000
--- a/arch/tile/kernel/ptrace.c
+++ /dev/null
@@ -1,316 +0,0 @@
-/*
- * Copyright 2010 Tilera Corporation. All Rights Reserved.
- *
- *   This program is free software; you can redistribute it and/or
- *   modify it under the terms of the GNU General Public License
- *   as published by the Free Software Foundation, version 2.
- *
- *   This program is distributed in the hope that it will be useful, but
- *   WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- *   NON INFRINGEMENT.  See the GNU General Public License for
- *   more details.
- *
- * Copied from i386: Ross Biro 1/23/92
- */
-
-#include <linux/kernel.h>
-#include <linux/ptrace.h>
-#include <linux/kprobes.h>
-#include <linux/compat.h>
-#include <linux/uaccess.h>
-#include <linux/regset.h>
-#include <linux/elf.h>
-#include <linux/tracehook.h>
-#include <linux/context_tracking.h>
-#include <linux/sched/task_stack.h>
-
-#include <asm/traps.h>
-#include <arch/chip.h>
-
-#define CREATE_TRACE_POINTS
-#include <trace/events/syscalls.h>
-
-void user_enable_single_step(struct task_struct *child)
-{
-	set_tsk_thread_flag(child, TIF_SINGLESTEP);
-}
-
-void user_disable_single_step(struct task_struct *child)
-{
-	clear_tsk_thread_flag(child, TIF_SINGLESTEP);
-}
-
-/*
- * Called by kernel/ptrace.c when detaching..
- */
-void ptrace_disable(struct task_struct *child)
-{
-	clear_tsk_thread_flag(child, TIF_SINGLESTEP);
-
-	/*
-	 * These two are currently unused, but will be set by arch_ptrace()
-	 * and used in the syscall assembly when we do support them.
-	 */
-	clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
-}
-
-/*
- * Get registers from task and ready the result for userspace.
- * Note that we localize the API issues to getregs() and putregs() at
- * some cost in performance, e.g. we need a full pt_regs copy for
- * PEEKUSR, and two copies for POKEUSR.  But in general we expect
- * GETREGS/PUTREGS to be the API of choice anyway.
- */
-static char *getregs(struct task_struct *child, struct pt_regs *uregs)
-{
-	*uregs = *task_pt_regs(child);
-
-	/* Set up flags ABI bits. */
-	uregs->flags = 0;
-#ifdef CONFIG_COMPAT
-	if (task_thread_info(child)->status & TS_COMPAT)
-		uregs->flags |= PT_FLAGS_COMPAT;
-#endif
-
-	return (char *)uregs;
-}
-
-/* Put registers back to task. */
-static void putregs(struct task_struct *child, struct pt_regs *uregs)
-{
-	struct pt_regs *regs = task_pt_regs(child);
-
-	/* Don't allow overwriting the kernel-internal flags word. */
-	uregs->flags = regs->flags;
-
-	/* Only allow setting the ICS bit in the ex1 word. */
-	uregs->ex1 = PL_ICS_EX1(USER_PL, EX1_ICS(uregs->ex1));
-
-	*regs = *uregs;
-}
-
-enum tile_regset {
-	REGSET_GPR,
-};
-
-static int tile_gpr_get(struct task_struct *target,
-			  const struct user_regset *regset,
-			  unsigned int pos, unsigned int count,
-			  void *kbuf, void __user *ubuf)
-{
-	struct pt_regs regs;
-
-	getregs(target, &regs);
-
-	return user_regset_copyout(&pos, &count, &kbuf, &ubuf, &regs, 0,
-				   sizeof(regs));
-}
-
-static int tile_gpr_set(struct task_struct *target,
-			  const struct user_regset *regset,
-			  unsigned int pos, unsigned int count,
-			  const void *kbuf, const void __user *ubuf)
-{
-	int ret;
-	struct pt_regs regs = *task_pt_regs(target);
-
-	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &regs, 0,
-				 sizeof(regs));
-	if (ret)
-		return ret;
-
-	putregs(target, &regs);
-
-	return 0;
-}
-
-static const struct user_regset tile_user_regset[] = {
-	[REGSET_GPR] = {
-		.core_note_type = NT_PRSTATUS,
-		.n = ELF_NGREG,
-		.size = sizeof(elf_greg_t),
-		.align = sizeof(elf_greg_t),
-		.get = tile_gpr_get,
-		.set = tile_gpr_set,
-	},
-};
-
-static const struct user_regset_view tile_user_regset_view = {
-	.name = CHIP_ARCH_NAME,
-	.e_machine = ELF_ARCH,
-	.ei_osabi = ELF_OSABI,
-	.regsets = tile_user_regset,
-	.n = ARRAY_SIZE(tile_user_regset),
-};
-
-const struct user_regset_view *task_user_regset_view(struct task_struct *task)
-{
-	return &tile_user_regset_view;
-}
-
-long arch_ptrace(struct task_struct *child, long request,
-		 unsigned long addr, unsigned long data)
-{
-	unsigned long __user *datap = (long __user __force *)data;
-	unsigned long tmp;
-	long ret = -EIO;
-	char *childreg;
-	struct pt_regs copyregs;
-
-	switch (request) {
-
-	case PTRACE_PEEKUSR:  /* Read register from pt_regs. */
-		if (addr >= PTREGS_SIZE)
-			break;
-		childreg = getregs(child, &copyregs) + addr;
-#ifdef CONFIG_COMPAT
-		if (is_compat_task()) {
-			if (addr & (sizeof(compat_long_t)-1))
-				break;
-			ret = put_user(*(compat_long_t *)childreg,
-				       (compat_long_t __user *)datap);
-		} else
-#endif
-		{
-			if (addr & (sizeof(long)-1))
-				break;
-			ret = put_user(*(long *)childreg, datap);
-		}
-		break;
-
-	case PTRACE_POKEUSR:  /* Write register in pt_regs. */
-		if (addr >= PTREGS_SIZE)
-			break;
-		childreg = getregs(child, &copyregs) + addr;
-#ifdef CONFIG_COMPAT
-		if (is_compat_task()) {
-			if (addr & (sizeof(compat_long_t)-1))
-				break;
-			*(compat_long_t *)childreg = data;
-		} else
-#endif
-		{
-			if (addr & (sizeof(long)-1))
-				break;
-			*(long *)childreg = data;
-		}
-		putregs(child, &copyregs);
-		ret = 0;
-		break;
-
-	case PTRACE_GETREGS:  /* Get all registers from the child. */
-		ret = copy_regset_to_user(child, &tile_user_regset_view,
-					  REGSET_GPR, 0,
-					  sizeof(struct pt_regs), datap);
-		break;
-
-	case PTRACE_SETREGS:  /* Set all registers in the child. */
-		ret = copy_regset_from_user(child, &tile_user_regset_view,
-					    REGSET_GPR, 0,
-					    sizeof(struct pt_regs), datap);
-		break;
-
-	case PTRACE_GETFPREGS:  /* Get the child FPU state. */
-	case PTRACE_SETFPREGS:  /* Set the child FPU state. */
-		break;
-
-	case PTRACE_SETOPTIONS:
-		/* Support TILE-specific ptrace options. */
-		BUILD_BUG_ON(PTRACE_O_MASK_TILE & PTRACE_O_MASK);
-		tmp = data & PTRACE_O_MASK_TILE;
-		data &= ~PTRACE_O_MASK_TILE;
-		ret = ptrace_request(child, request, addr, data);
-		if (ret == 0) {
-			unsigned int flags = child->ptrace;
-			flags &= ~(PTRACE_O_MASK_TILE << PT_OPT_FLAG_SHIFT);
-			flags |= (tmp << PT_OPT_FLAG_SHIFT);
-			child->ptrace = flags;
-		}
-		break;
-
-	default:
-#ifdef CONFIG_COMPAT
-		if (task_thread_info(current)->status & TS_COMPAT) {
-			ret = compat_ptrace_request(child, request,
-						    addr, data);
-			break;
-		}
-#endif
-		ret = ptrace_request(child, request, addr, data);
-		break;
-	}
-
-	return ret;
-}
-
-#ifdef CONFIG_COMPAT
-/* Not used; we handle compat issues in arch_ptrace() directly. */
-long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
-			       compat_ulong_t addr, compat_ulong_t data)
-{
-	BUG();
-}
-#endif
-
-int do_syscall_trace_enter(struct pt_regs *regs)
-{
-	u32 work = READ_ONCE(current_thread_info()->flags);
-
-	if ((work & _TIF_SYSCALL_TRACE) &&
-	    tracehook_report_syscall_entry(regs)) {
-		regs->regs[TREG_SYSCALL_NR] = -1;
-		return -1;
-	}
-
-	if (secure_computing(NULL) == -1)
-		return -1;
-
-	if (work & _TIF_SYSCALL_TRACEPOINT)
-		trace_sys_enter(regs, regs->regs[TREG_SYSCALL_NR]);
-
-	return regs->regs[TREG_SYSCALL_NR];
-}
-
-void do_syscall_trace_exit(struct pt_regs *regs)
-{
-	long errno;
-
-	/*
-	 * The standard tile calling convention returns the value (or negative
-	 * errno) in r0, and zero (or positive errno) in r1.
-	 * It saves a couple of cycles on the hot path to do this work in
-	 * registers only as we return, rather than updating the in-memory
-	 * struct ptregs.
-	 */
-	errno = (long) regs->regs[0];
-	if (errno < 0 && errno > -4096)
-		regs->regs[1] = -errno;
-	else
-		regs->regs[1] = 0;
-
-	if (test_thread_flag(TIF_SYSCALL_TRACE))
-		tracehook_report_syscall_exit(regs, 0);
-
-	if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
-		trace_sys_exit(regs, regs->regs[0]);
-}
-
-void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs)
-{
-	struct siginfo info;
-
-	memset(&info, 0, sizeof(info));
-	info.si_signo = SIGTRAP;
-	info.si_code  = TRAP_BRKPT;
-	info.si_addr  = (void __user *) regs->pc;
-
-	/* Send us the fakey SIGTRAP */
-	force_sig_info(SIGTRAP, &info, tsk);
-}
-
-/* Handle synthetic interrupt delivered only by the simulator. */
-void __kprobes do_breakpoint(struct pt_regs* regs, int fault_num)
-{
-	send_sigtrap(current, regs);
-}