1 files changed, 0 insertions, 492 deletions
diff --git a/arch/cris/arch-v32/kernel/ptrace.c b/arch/cris/arch-v32/kernel/ptrace.c
deleted file mode 100644
index ccac1aaadc8a..000000000000
--- a/arch/cris/arch-v32/kernel/ptrace.c
+++ /dev/null
@@ -1,492 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2000-2007, Axis Communications AB.
- */
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/sched/task_stack.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/errno.h>
-#include <linux/ptrace.h>
-#include <linux/user.h>
-#include <linux/signal.h>
-#include <linux/security.h>
-
-#include <linux/uaccess.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/processor.h>
-#include <arch/hwregs/supp_reg.h>
-
-/*
- * Determines which bits in CCS the user has access to.
- * 1 = access, 0 = no access.
- */
-#define CCS_MASK 0x00087c00     /* SXNZVC */
-
-#define SBIT_USER (1 << (S_CCS_BITNR + CCS_SHIFT))
-
-static int put_debugreg(long pid, unsigned int regno, long data);
-static long get_debugreg(long pid, unsigned int regno);
-static unsigned long get_pseudo_pc(struct task_struct *child);
-void deconfigure_bp(long pid);
-
-extern unsigned long cris_signal_return_page;
-
-/*
- * Get contents of register REGNO in task TASK.
- */
-long get_reg(struct task_struct *task, unsigned int regno)
-{
-	/* USP is a special case, it's not in the pt_regs struct but
-	 * in the tasks thread struct
-	 */
-	unsigned long ret;
-
-	if (regno <= PT_EDA)
-		ret = ((unsigned long *)task_pt_regs(task))[regno];
-	else if (regno == PT_USP)
-		ret = task->thread.usp;
-	else if (regno == PT_PPC)
-		ret = get_pseudo_pc(task);
-	else if (regno <= PT_MAX)
-		ret = get_debugreg(task->pid, regno);
-	else
-		ret = 0;
-
-	return ret;
-}
-
-/*
- * Write contents of register REGNO in task TASK.
- */
-int put_reg(struct task_struct *task, unsigned int regno, unsigned long data)
-{
-	if (regno <= PT_EDA)
-		((unsigned long *)task_pt_regs(task))[regno] = data;
-	else if (regno == PT_USP)
-		task->thread.usp = data;
-	else if (regno == PT_PPC) {
-		/* Write pseudo-PC to ERP only if changed. */
-		if (data != get_pseudo_pc(task))
-			task_pt_regs(task)->erp = data;
-	} else if (regno <= PT_MAX)
-		return put_debugreg(task->pid, regno, data);
-	else
-		return -1;
-	return 0;
-}
-
-void user_enable_single_step(struct task_struct *child)
-{
-	unsigned long tmp;
-
-	/*
-	 * Set up SPC if not set already (in which case we have no other
-	 * choice but to trust it).
-	 */
-	if (!get_reg(child, PT_SPC)) {
-		/* In case we're stopped in a delay slot. */
-		tmp = get_reg(child, PT_ERP) & ~1;
-		put_reg(child, PT_SPC, tmp);
-	}
-	tmp = get_reg(child, PT_CCS) | SBIT_USER;
-	put_reg(child, PT_CCS, tmp);
-}
-
-void user_disable_single_step(struct task_struct *child)
-{
-	put_reg(child, PT_SPC, 0);
-
-	if (!get_debugreg(child->pid, PT_BP_CTRL)) {
-		unsigned long tmp;
-		/* If no h/w bp configured, disable S bit. */
-		tmp = get_reg(child, PT_CCS) & ~SBIT_USER;
-		put_reg(child, PT_CCS, tmp);
-	}
-}
-
-/*
- * Called by kernel/ptrace.c when detaching.
- *
- * Make sure the single step bit is not set.
- */
-void
-ptrace_disable(struct task_struct *child)
-{
-	/* Deconfigure SPC and S-bit. */
-	user_disable_single_step(child);
-	put_reg(child, PT_SPC, 0);
-
-	/* Deconfigure any watchpoints associated with the child. */
-	deconfigure_bp(child->pid);
-}
-
-
-long arch_ptrace(struct task_struct *child, long request,
-		 unsigned long addr, unsigned long data)
-{
-	int ret;
-	unsigned int regno = addr >> 2;
-	unsigned long __user *datap = (unsigned long __user *)data;
-
-	switch (request) {
-		/* Read word at location address. */
-		case PTRACE_PEEKTEXT:
-		case PTRACE_PEEKDATA: {
-			unsigned long tmp;
-			int copied;
-
-			ret = -EIO;
-
-			/* The signal trampoline page is outside the normal user-addressable
-			 * space but still accessible. This is hack to make it possible to
-			 * access the signal handler code in GDB.
-			 */
-			if ((addr & PAGE_MASK) == cris_signal_return_page) {
-				/* The trampoline page is globally mapped, no page table to traverse.*/
-				tmp = *(unsigned long*)addr;
-			} else {
-				copied = ptrace_access_vm(child, addr, &tmp, sizeof(tmp), FOLL_FORCE);
-
-				if (copied != sizeof(tmp))
-					break;
-			}
-
-			ret = put_user(tmp,datap);
-			break;
-		}
-
-		/* Read the word at location address in the USER area. */
-		case PTRACE_PEEKUSR: {
-			unsigned long tmp;
-
-			ret = -EIO;
-			if ((addr & 3) || regno > PT_MAX)
-				break;
-
-			tmp = get_reg(child, regno);
-			ret = put_user(tmp, datap);
-			break;
-		}
-
-		/* Write the word at location address. */
-		case PTRACE_POKETEXT:
-		case PTRACE_POKEDATA:
-			ret = generic_ptrace_pokedata(child, addr, data);
-			break;
-
-		/* Write the word at location address in the USER area. */
-		case PTRACE_POKEUSR:
-			ret = -EIO;
-			if ((addr & 3) || regno > PT_MAX)
-				break;
-
-			if (regno == PT_CCS) {
-				/* don't allow the tracing process to change stuff like
-				 * interrupt enable, kernel/user bit, dma enables etc.
-				 */
-				data &= CCS_MASK;
-				data |= get_reg(child, PT_CCS) & ~CCS_MASK;
-			}
-			if (put_reg(child, regno, data))
-				break;
-			ret = 0;
-			break;
-
-		/* Get all GP registers from the child. */
-		case PTRACE_GETREGS: {
-			int i;
-			unsigned long tmp;
-
-			for (i = 0; i <= PT_MAX; i++) {
-				tmp = get_reg(child, i);
-
-				if (put_user(tmp, datap)) {
-					ret = -EFAULT;
-					goto out_tsk;
-				}
-
-				datap++;
-			}
-
-			ret = 0;
-			break;
-		}
-
-		/* Set all GP registers in the child. */
-		case PTRACE_SETREGS: {
-			int i;
-			unsigned long tmp;
-
-			for (i = 0; i <= PT_MAX; i++) {
-				if (get_user(tmp, datap)) {
-					ret = -EFAULT;
-					goto out_tsk;
-				}
-
-				if (i == PT_CCS) {
-					tmp &= CCS_MASK;
-					tmp |= get_reg(child, PT_CCS) & ~CCS_MASK;
-				}
-
-				put_reg(child, i, tmp);
-				datap++;
-			}
-
-			ret = 0;
-			break;
-		}
-
-		default:
-			ret = ptrace_request(child, request, addr, data);
-			break;
-	}
-
-out_tsk:
-	return ret;
-}
-
-void do_syscall_trace(void)
-{
-	if (!test_thread_flag(TIF_SYSCALL_TRACE))
-		return;
-
-	if (!(current->ptrace & PT_PTRACED))
-		return;
-
-	/* the 0x80 provides a way for the tracing parent to distinguish
-	   between a syscall stop and SIGTRAP delivery */
-	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.
-	 */
-	if (current->exit_code) {
-		send_sig(current->exit_code, current, 1);
-		current->exit_code = 0;
-	}
-}
-
-/* Returns the size of an instruction that has a delay slot. */
-
-static int insn_size(struct task_struct *child, unsigned long pc)
-{
-  unsigned long opcode;
-  int copied;
-  int opsize = 0;
-
-  /* Read the opcode at pc (do what PTRACE_PEEKTEXT would do). */
-  copied = access_process_vm(child, pc, &opcode, sizeof(opcode), FOLL_FORCE);
-  if (copied != sizeof(opcode))
-    return 0;
-
-  switch ((opcode & 0x0f00) >> 8) {
-  case 0x0:
-  case 0x9:
-  case 0xb:
-	  opsize = 2;
-	  break;
-  case 0xe:
-  case 0xf:
-	  opsize = 6;
-	  break;
-  case 0xd:
-	  /* Could be 4 or 6; check more bits. */
-	  if ((opcode & 0xff) == 0xff)
-		  opsize = 4;
-	  else
-		  opsize = 6;
-	  break;
-  default:
-	  panic("ERROR: Couldn't find size of opcode 0x%lx at 0x%lx\n",
-		opcode, pc);
-  }
-
-  return opsize;
-}
-
-static unsigned long get_pseudo_pc(struct task_struct *child)
-{
-	/* Default value for PC is ERP. */
-	unsigned long pc = get_reg(child, PT_ERP);
-
-	if (pc & 0x1) {
-		unsigned long spc = get_reg(child, PT_SPC);
-		/* Delay slot bit set. Report as stopped on proper
-		   instruction. */
-		if (spc) {
-			/* Rely on SPC if set. FIXME: We might want to check
-			   that EXS indicates we stopped due to a single-step
-			   exception. */
-			pc = spc;
-		} else {
-			/* Calculate the PC from the size of the instruction
-			   that the delay slot we're in belongs to. */
-			pc += insn_size(child, pc & ~1) - 1;
-		}
-	}
-	return pc;
-}
-
-static long bp_owner = 0;
-
-/* Reachable from exit_thread in signal.c, so not static. */
-void deconfigure_bp(long pid)
-{
-	int bp;
-
-	/* Only deconfigure if the pid is the owner. */
-	if (bp_owner != pid)
-		return;
-
-	for (bp = 0; bp < 6; bp++) {
-		unsigned long tmp;
-		/* Deconfigure start and end address (also gets rid of ownership). */
-		put_debugreg(pid, PT_BP + 3 + (bp * 2), 0);
-		put_debugreg(pid, PT_BP + 4 + (bp * 2), 0);
-
-		/* Deconfigure relevant bits in control register. */
-		tmp = get_debugreg(pid, PT_BP_CTRL) & ~(3 << (2 + (bp * 4)));
-		put_debugreg(pid, PT_BP_CTRL, tmp);
-	}
-	/* No owner now. */
-	bp_owner = 0;
-}
-
-static int put_debugreg(long pid, unsigned int regno, long data)
-{
-	int ret = 0;
-	register int old_srs;
-
-#ifdef CONFIG_ETRAX_KGDB
-	/* Ignore write, but pretend it was ok if value is 0
-	   (we don't want POKEUSR/SETREGS failing unnessecarily). */
-	return (data == 0) ? ret : -1;
-#endif
-
-	/* Simple owner management. */
-	if (!bp_owner)
-		bp_owner = pid;
-	else if (bp_owner != pid) {
-		/* Ignore write, but pretend it was ok if value is 0
-		   (we don't want POKEUSR/SETREGS failing unnessecarily). */
-		return (data == 0) ? ret : -1;
-	}
-
-	/* Remember old SRS. */
-	SPEC_REG_RD(SPEC_REG_SRS, old_srs);
-	/* Switch to BP bank. */
-	SUPP_BANK_SEL(BANK_BP);
-
-	switch (regno - PT_BP) {
-	case 0:
-		SUPP_REG_WR(0, data); break;
-	case 1:
-	case 2:
-		if (data)
-			ret = -1;
-		break;
-	case 3:
-		SUPP_REG_WR(3, data); break;
-	case 4:
-		SUPP_REG_WR(4, data); break;
-	case 5:
-		SUPP_REG_WR(5, data); break;
-	case 6:
-		SUPP_REG_WR(6, data); break;
-	case 7:
-		SUPP_REG_WR(7, data); break;
-	case 8:
-		SUPP_REG_WR(8, data); break;
-	case 9:
-		SUPP_REG_WR(9, data); break;
-	case 10:
-		SUPP_REG_WR(10, data); break;
-	case 11:
-		SUPP_REG_WR(11, data); break;
-	case 12:
-		SUPP_REG_WR(12, data); break;
-	case 13:
-		SUPP_REG_WR(13, data); break;
-	case 14:
-		SUPP_REG_WR(14, data); break;
-	default:
-		ret = -1;
-		break;
-	}
-
-	/* Restore SRS. */
-	SPEC_REG_WR(SPEC_REG_SRS, old_srs);
-	/* Just for show. */
-	NOP();
-	NOP();
-	NOP();
-
-	return ret;
-}
-
-static long get_debugreg(long pid, unsigned int regno)
-{
-	register int old_srs;
-	register long data;
-
-	if (pid != bp_owner) {
-		return 0;
-	}
-
-	/* Remember old SRS. */
-	SPEC_REG_RD(SPEC_REG_SRS, old_srs);
-	/* Switch to BP bank. */
-	SUPP_BANK_SEL(BANK_BP);
-
-	switch (regno - PT_BP) {
-	case 0:
-		SUPP_REG_RD(0, data); break;
-	case 1:
-	case 2:
-		/* error return value? */
-		data = 0;
-		break;
-	case 3:
-		SUPP_REG_RD(3, data); break;
-	case 4:
-		SUPP_REG_RD(4, data); break;
-	case 5:
-		SUPP_REG_RD(5, data); break;
-	case 6:
-		SUPP_REG_RD(6, data); break;
-	case 7:
-		SUPP_REG_RD(7, data); break;
-	case 8:
-		SUPP_REG_RD(8, data); break;
-	case 9:
-		SUPP_REG_RD(9, data); break;
-	case 10:
-		SUPP_REG_RD(10, data); break;
-	case 11:
-		SUPP_REG_RD(11, data); break;
-	case 12:
-		SUPP_REG_RD(12, data); break;
-	case 13:
-		SUPP_REG_RD(13, data); break;
-	case 14:
-		SUPP_REG_RD(14, data); break;
-	default:
-		/* error return value? */
-		data = 0;
-	}
-
-	/* Restore SRS. */
-	SPEC_REG_WR(SPEC_REG_SRS, old_srs);
-	/* Just for show. */
-	NOP();
-	NOP();
-	NOP();
-
-	return data;
-}