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-rw-r--r--arch/mn10300/kernel/ptrace.c386
1 files changed, 0 insertions, 386 deletions
diff --git a/arch/mn10300/kernel/ptrace.c b/arch/mn10300/kernel/ptrace.c
deleted file mode 100644
index 8009876a7ac4..000000000000
--- a/arch/mn10300/kernel/ptrace.c
+++ /dev/null
@@ -1,386 +0,0 @@
-/* MN10300 Process tracing
- *
- * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- * Modified by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-#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/regset.h>
-#include <linux/elf.h>
-#include <linux/tracehook.h>
-#include <linux/uaccess.h>
-#include <asm/pgtable.h>
-#include <asm/processor.h>
-#include <asm/cacheflush.h>
-#include <asm/fpu.h>
-#include <asm/asm-offsets.h>
-
-/*
- * translate ptrace register IDs into struct pt_regs offsets
- */
-static const u8 ptrace_regid_to_frame[] = {
- [PT_A3 << 2] = REG_A3,
- [PT_A2 << 2] = REG_A2,
- [PT_D3 << 2] = REG_D3,
- [PT_D2 << 2] = REG_D2,
- [PT_MCVF << 2] = REG_MCVF,
- [PT_MCRL << 2] = REG_MCRL,
- [PT_MCRH << 2] = REG_MCRH,
- [PT_MDRQ << 2] = REG_MDRQ,
- [PT_E1 << 2] = REG_E1,
- [PT_E0 << 2] = REG_E0,
- [PT_E7 << 2] = REG_E7,
- [PT_E6 << 2] = REG_E6,
- [PT_E5 << 2] = REG_E5,
- [PT_E4 << 2] = REG_E4,
- [PT_E3 << 2] = REG_E3,
- [PT_E2 << 2] = REG_E2,
- [PT_SP << 2] = REG_SP,
- [PT_LAR << 2] = REG_LAR,
- [PT_LIR << 2] = REG_LIR,
- [PT_MDR << 2] = REG_MDR,
- [PT_A1 << 2] = REG_A1,
- [PT_A0 << 2] = REG_A0,
- [PT_D1 << 2] = REG_D1,
- [PT_D0 << 2] = REG_D0,
- [PT_ORIG_D0 << 2] = REG_ORIG_D0,
- [PT_EPSW << 2] = REG_EPSW,
- [PT_PC << 2] = REG_PC,
-};
-
-static inline int get_stack_long(struct task_struct *task, int offset)
-{
- return *(unsigned long *)
- ((unsigned long) task->thread.uregs + offset);
-}
-
-static inline
-int put_stack_long(struct task_struct *task, int offset, unsigned long data)
-{
- unsigned long stack;
-
- stack = (unsigned long) task->thread.uregs + offset;
- *(unsigned long *) stack = data;
- return 0;
-}
-
-/*
- * retrieve the contents of MN10300 userspace general registers
- */
-static int genregs_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- const struct pt_regs *regs = task_pt_regs(target);
- int ret;
-
- /* we need to skip regs->next */
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- regs, 0, PT_ORIG_D0 * sizeof(long));
- if (ret < 0)
- return ret;
-
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- &regs->orig_d0, PT_ORIG_D0 * sizeof(long),
- NR_PTREGS * sizeof(long));
- if (ret < 0)
- return ret;
-
- return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- NR_PTREGS * sizeof(long), -1);
-}
-
-/*
- * update the contents of the MN10300 userspace general registers
- */
-static int genregs_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- struct pt_regs *regs = task_pt_regs(target);
- unsigned long tmp;
- int ret;
-
- /* we need to skip regs->next */
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- regs, 0, PT_ORIG_D0 * sizeof(long));
- if (ret < 0)
- return ret;
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &regs->orig_d0, PT_ORIG_D0 * sizeof(long),
- PT_EPSW * sizeof(long));
- if (ret < 0)
- return ret;
-
- /* we need to mask off changes to EPSW */
- tmp = regs->epsw;
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &tmp, PT_EPSW * sizeof(long),
- PT_PC * sizeof(long));
- tmp &= EPSW_FLAG_V | EPSW_FLAG_C | EPSW_FLAG_N | EPSW_FLAG_Z;
- tmp |= regs->epsw & ~(EPSW_FLAG_V | EPSW_FLAG_C | EPSW_FLAG_N |
- EPSW_FLAG_Z);
- regs->epsw = tmp;
-
- if (ret < 0)
- return ret;
-
- /* and finally load the PC */
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &regs->pc, PT_PC * sizeof(long),
- NR_PTREGS * sizeof(long));
-
- if (ret < 0)
- return ret;
-
- return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
- NR_PTREGS * sizeof(long), -1);
-}
-
-/*
- * retrieve the contents of MN10300 userspace FPU registers
- */
-static int fpuregs_get(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- void *kbuf, void __user *ubuf)
-{
- const struct fpu_state_struct *fpregs = &target->thread.fpu_state;
- int ret;
-
- unlazy_fpu(target);
-
- ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
- fpregs, 0, sizeof(*fpregs));
- if (ret < 0)
- return ret;
-
- return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
- sizeof(*fpregs), -1);
-}
-
-/*
- * update the contents of the MN10300 userspace FPU registers
- */
-static int fpuregs_set(struct task_struct *target,
- const struct user_regset *regset,
- unsigned int pos, unsigned int count,
- const void *kbuf, const void __user *ubuf)
-{
- struct fpu_state_struct fpu_state = target->thread.fpu_state;
- int ret;
-
- ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
- &fpu_state, 0, sizeof(fpu_state));
- if (ret < 0)
- return ret;
-
- fpu_kill_state(target);
- target->thread.fpu_state = fpu_state;
- set_using_fpu(target);
-
- return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
- sizeof(fpu_state), -1);
-}
-
-/*
- * determine if the FPU registers have actually been used
- */
-static int fpuregs_active(struct task_struct *target,
- const struct user_regset *regset)
-{
- return is_using_fpu(target) ? regset->n : 0;
-}
-
-/*
- * Define the register sets available on the MN10300 under Linux
- */
-enum mn10300_regset {
- REGSET_GENERAL,
- REGSET_FPU,
-};
-
-static const struct user_regset mn10300_regsets[] = {
- /*
- * General register format is:
- * A3, A2, D3, D2, MCVF, MCRL, MCRH, MDRQ
- * E1, E0, E7...E2, SP, LAR, LIR, MDR
- * A1, A0, D1, D0, ORIG_D0, EPSW, PC
- */
- [REGSET_GENERAL] = {
- .core_note_type = NT_PRSTATUS,
- .n = ELF_NGREG,
- .size = sizeof(long),
- .align = sizeof(long),
- .get = genregs_get,
- .set = genregs_set,
- },
- /*
- * FPU register format is:
- * FS0-31, FPCR
- */
- [REGSET_FPU] = {
- .core_note_type = NT_PRFPREG,
- .n = sizeof(struct fpu_state_struct) / sizeof(long),
- .size = sizeof(long),
- .align = sizeof(long),
- .get = fpuregs_get,
- .set = fpuregs_set,
- .active = fpuregs_active,
- },
-};
-
-static const struct user_regset_view user_mn10300_native_view = {
- .name = "mn10300",
- .e_machine = EM_MN10300,
- .regsets = mn10300_regsets,
- .n = ARRAY_SIZE(mn10300_regsets),
-};
-
-const struct user_regset_view *task_user_regset_view(struct task_struct *task)
-{
- return &user_mn10300_native_view;
-}
-
-/*
- * set the single-step bit
- */
-void user_enable_single_step(struct task_struct *child)
-{
-#ifndef CONFIG_MN10300_USING_JTAG
- struct user *dummy = NULL;
- long tmp;
-
- tmp = get_stack_long(child, (unsigned long) &dummy->regs.epsw);
- tmp |= EPSW_T;
- put_stack_long(child, (unsigned long) &dummy->regs.epsw, tmp);
-#endif
-}
-
-/*
- * make sure the single-step bit is not set
- */
-void user_disable_single_step(struct task_struct *child)
-{
-#ifndef CONFIG_MN10300_USING_JTAG
- struct user *dummy = NULL;
- long tmp;
-
- tmp = get_stack_long(child, (unsigned long) &dummy->regs.epsw);
- tmp &= ~EPSW_T;
- put_stack_long(child, (unsigned long) &dummy->regs.epsw, tmp);
-#endif
-}
-
-void ptrace_disable(struct task_struct *child)
-{
- user_disable_single_step(child);
-}
-
-/*
- * handle the arch-specific side of process tracing
- */
-long arch_ptrace(struct task_struct *child, long request,
- unsigned long addr, unsigned long data)
-{
- unsigned long tmp;
- int ret;
- unsigned long __user *datap = (unsigned long __user *) data;
-
- switch (request) {
- /* read the word at location addr in the USER area. */
- case PTRACE_PEEKUSR:
- ret = -EIO;
- if ((addr & 3) || addr > sizeof(struct user) - 3)
- break;
-
- tmp = 0; /* Default return condition */
- if (addr < NR_PTREGS << 2)
- tmp = get_stack_long(child,
- ptrace_regid_to_frame[addr]);
- ret = put_user(tmp, datap);
- break;
-
- /* write the word at location addr in the USER area */
- case PTRACE_POKEUSR:
- ret = -EIO;
- if ((addr & 3) || addr > sizeof(struct user) - 3)
- break;
-
- ret = 0;
- if (addr < NR_PTREGS << 2)
- ret = put_stack_long(child, ptrace_regid_to_frame[addr],
- data);
- break;
-
- case PTRACE_GETREGS: /* Get all integer regs from the child. */
- return copy_regset_to_user(child, &user_mn10300_native_view,
- REGSET_GENERAL,
- 0, NR_PTREGS * sizeof(long),
- datap);
-
- case PTRACE_SETREGS: /* Set all integer regs in the child. */
- return copy_regset_from_user(child, &user_mn10300_native_view,
- REGSET_GENERAL,
- 0, NR_PTREGS * sizeof(long),
- datap);
-
- case PTRACE_GETFPREGS: /* Get the child FPU state. */
- return copy_regset_to_user(child, &user_mn10300_native_view,
- REGSET_FPU,
- 0, sizeof(struct fpu_state_struct),
- datap);
-
- case PTRACE_SETFPREGS: /* Set the child FPU state. */
- return copy_regset_from_user(child, &user_mn10300_native_view,
- REGSET_FPU,
- 0, sizeof(struct fpu_state_struct),
- datap);
-
- default:
- ret = ptrace_request(child, request, addr, data);
- break;
- }
-
- return ret;
-}
-
-/*
- * handle tracing of system call entry
- * - return the revised system call number or ULONG_MAX to cause ENOSYS
- */
-asmlinkage unsigned long syscall_trace_entry(struct pt_regs *regs)
-{
- if (tracehook_report_syscall_entry(regs))
- /* tracing decided this syscall should not happen, so
- * We'll return a bogus call number to get an ENOSYS
- * error, but leave the original number in
- * regs->orig_d0
- */
- return ULONG_MAX;
-
- return regs->orig_d0;
-}
-
-/*
- * handle tracing of system call exit
- */
-asmlinkage void syscall_trace_exit(struct pt_regs *regs)
-{
- tracehook_report_syscall_exit(regs, 0);
-}
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