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Diffstat (limited to 'arch/mn10300/kernel/ptrace.c')
| -rw-r--r-- | arch/mn10300/kernel/ptrace.c | 386 |
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, - ®s->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, - ®s->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, - ®s->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); -} |