2005-04-16 16:20:36 -06:00
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/*
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* PowerPC version
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* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
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*
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* Derived from "arch/m68k/kernel/ptrace.c"
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* Copyright (C) 1994 by Hamish Macdonald
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* Taken from linux/kernel/ptrace.c and modified for M680x0.
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* linux/kernel/ptrace.c is by Ross Biro 1/23/92, edited by Linus Torvalds
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*
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* Modified by Cort Dougan (cort@hq.fsmlabs.com)
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2005-10-19 17:11:29 -06:00
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* and Paul Mackerras (paulus@samba.org).
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2005-04-16 16:20:36 -06:00
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file README.legal in the main directory of
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* this archive for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/smp.h>
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#include <linux/errno.h>
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#include <linux/ptrace.h>
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2007-12-20 04:57:34 -07:00
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#include <linux/regset.h>
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2007-12-20 04:57:39 -07:00
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#include <linux/elf.h>
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2005-04-16 16:20:36 -06:00
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#include <linux/user.h>
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#include <linux/security.h>
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2005-05-01 09:59:14 -06:00
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#include <linux/signal.h>
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2005-05-08 08:56:09 -06:00
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#include <linux/seccomp.h>
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#include <linux/audit.h>
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2005-10-12 23:52:04 -06:00
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#ifdef CONFIG_PPC32
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2005-05-08 08:56:09 -06:00
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#include <linux/module.h>
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2005-10-12 23:52:04 -06:00
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#endif
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2005-04-16 16:20:36 -06:00
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#include <asm/uaccess.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <asm/system.h>
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2005-11-19 02:47:22 -07:00
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2007-06-03 23:15:47 -06:00
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/*
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* does not yet catch signals sent when the child dies.
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* in exit.c or in signal.c.
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*/
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/*
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* Set of msr bits that gdb can change on behalf of a process.
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*/
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#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
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#define MSR_DEBUGCHANGE 0
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2005-04-16 16:20:36 -06:00
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#else
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2007-06-03 23:15:47 -06:00
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#define MSR_DEBUGCHANGE (MSR_SE | MSR_BE)
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2005-04-16 16:20:36 -06:00
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#endif
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2007-06-03 23:15:41 -06:00
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2005-04-16 16:20:36 -06:00
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/*
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2007-06-03 23:15:47 -06:00
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* Max register writeable via put_reg
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2005-04-16 16:20:36 -06:00
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*/
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2007-06-03 23:15:47 -06:00
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#ifdef CONFIG_PPC32
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#define PT_MAX_PUT_REG PT_MQ
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#else
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#define PT_MAX_PUT_REG PT_CCR
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#endif
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2005-04-16 16:20:36 -06:00
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2007-12-20 04:57:51 -07:00
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static unsigned long get_user_msr(struct task_struct *task)
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{
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return task->thread.regs->msr | task->thread.fpexc_mode;
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}
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static int set_user_msr(struct task_struct *task, unsigned long msr)
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{
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task->thread.regs->msr &= ~MSR_DEBUGCHANGE;
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task->thread.regs->msr |= msr & MSR_DEBUGCHANGE;
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return 0;
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}
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/*
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* We prevent mucking around with the reserved area of trap
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* which are used internally by the kernel.
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*/
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static int set_user_trap(struct task_struct *task, unsigned long trap)
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{
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task->thread.regs->trap = trap & 0xfff0;
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return 0;
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}
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2007-06-03 23:15:44 -06:00
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/*
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* Get contents of register REGNO in task TASK.
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*/
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unsigned long ptrace_get_reg(struct task_struct *task, int regno)
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{
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if (task->thread.regs == NULL)
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return -EIO;
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2007-12-20 04:57:51 -07:00
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if (regno == PT_MSR)
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return get_user_msr(task);
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2007-06-03 23:15:44 -06:00
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if (regno < (sizeof(struct pt_regs) / sizeof(unsigned long)))
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return ((unsigned long *)task->thread.regs)[regno];
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return -EIO;
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}
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/*
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* Write contents of register REGNO in task TASK.
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*/
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int ptrace_put_reg(struct task_struct *task, int regno, unsigned long data)
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{
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if (task->thread.regs == NULL)
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return -EIO;
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2007-12-20 04:57:51 -07:00
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if (regno == PT_MSR)
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return set_user_msr(task, data);
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if (regno == PT_TRAP)
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return set_user_trap(task, data);
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if (regno <= PT_MAX_PUT_REG) {
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2007-06-03 23:15:44 -06:00
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((unsigned long *)task->thread.regs)[regno] = data;
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return 0;
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}
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return -EIO;
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}
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2007-12-20 04:57:55 -07:00
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static int gpr_get(struct task_struct *target, const struct user_regset *regset,
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unsigned int pos, unsigned int count,
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void *kbuf, void __user *ubuf)
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{
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int ret;
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if (target->thread.regs == NULL)
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return -EIO;
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CHECK_FULL_REGS(target->thread.regs);
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ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
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target->thread.regs,
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0, offsetof(struct pt_regs, msr));
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if (!ret) {
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unsigned long msr = get_user_msr(target);
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ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &msr,
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offsetof(struct pt_regs, msr),
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offsetof(struct pt_regs, msr) +
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sizeof(msr));
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}
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BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
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offsetof(struct pt_regs, msr) + sizeof(long));
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if (!ret)
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ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
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&target->thread.regs->orig_gpr3,
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offsetof(struct pt_regs, orig_gpr3),
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sizeof(struct pt_regs));
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if (!ret)
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ret = user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
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sizeof(struct pt_regs), -1);
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return ret;
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}
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static int gpr_set(struct task_struct *target, const struct user_regset *regset,
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unsigned int pos, unsigned int count,
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const void *kbuf, const void __user *ubuf)
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{
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unsigned long reg;
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int ret;
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if (target->thread.regs == NULL)
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return -EIO;
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CHECK_FULL_REGS(target->thread.regs);
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
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target->thread.regs,
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0, PT_MSR * sizeof(reg));
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if (!ret && count > 0) {
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®,
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PT_MSR * sizeof(reg),
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(PT_MSR + 1) * sizeof(reg));
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if (!ret)
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ret = set_user_msr(target, reg);
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}
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BUILD_BUG_ON(offsetof(struct pt_regs, orig_gpr3) !=
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offsetof(struct pt_regs, msr) + sizeof(long));
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if (!ret)
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
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&target->thread.regs->orig_gpr3,
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PT_ORIG_R3 * sizeof(reg),
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(PT_MAX_PUT_REG + 1) * sizeof(reg));
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if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret)
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ret = user_regset_copyin_ignore(
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&pos, &count, &kbuf, &ubuf,
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(PT_MAX_PUT_REG + 1) * sizeof(reg),
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PT_TRAP * sizeof(reg));
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if (!ret && count > 0) {
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, ®,
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PT_TRAP * sizeof(reg),
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(PT_TRAP + 1) * sizeof(reg));
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if (!ret)
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ret = set_user_trap(target, reg);
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}
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if (!ret)
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ret = user_regset_copyin_ignore(
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&pos, &count, &kbuf, &ubuf,
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(PT_TRAP + 1) * sizeof(reg), -1);
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return ret;
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}
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2007-06-03 23:15:44 -06:00
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2007-12-20 04:57:34 -07:00
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static int fpr_get(struct task_struct *target, const struct user_regset *regset,
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unsigned int pos, unsigned int count,
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void *kbuf, void __user *ubuf)
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{
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flush_fp_to_thread(target);
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BUILD_BUG_ON(offsetof(struct thread_struct, fpscr) !=
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offsetof(struct thread_struct, fpr[32]));
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return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
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&target->thread.fpr, 0, -1);
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}
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static int fpr_set(struct task_struct *target, const struct user_regset *regset,
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unsigned int pos, unsigned int count,
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const void *kbuf, const void __user *ubuf)
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{
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flush_fp_to_thread(target);
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BUILD_BUG_ON(offsetof(struct thread_struct, fpscr) !=
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offsetof(struct thread_struct, fpr[32]));
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return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
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&target->thread.fpr, 0, -1);
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}
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2007-06-03 23:15:44 -06:00
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#ifdef CONFIG_ALTIVEC
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/*
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* Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go.
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* The transfer totals 34 quadword. Quadwords 0-31 contain the
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* corresponding vector registers. Quadword 32 contains the vscr as the
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* last word (offset 12) within that quadword. Quadword 33 contains the
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* vrsave as the first word (offset 0) within the quadword.
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*
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* This definition of the VMX state is compatible with the current PPC32
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* ptrace interface. This allows signal handling and ptrace to use the
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* same structures. This also simplifies the implementation of a bi-arch
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* (combined (32- and 64-bit) gdb.
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*/
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2007-12-20 04:57:39 -07:00
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static int vr_active(struct task_struct *target,
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const struct user_regset *regset)
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{
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flush_altivec_to_thread(target);
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return target->thread.used_vr ? regset->n : 0;
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}
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static int vr_get(struct task_struct *target, const struct user_regset *regset,
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unsigned int pos, unsigned int count,
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void *kbuf, void __user *ubuf)
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{
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int ret;
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flush_altivec_to_thread(target);
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BUILD_BUG_ON(offsetof(struct thread_struct, vscr) !=
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offsetof(struct thread_struct, vr[32]));
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ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
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&target->thread.vr, 0,
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33 * sizeof(vector128));
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if (!ret) {
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/*
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* Copy out only the low-order word of vrsave.
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*/
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union {
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elf_vrreg_t reg;
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u32 word;
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} vrsave;
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memset(&vrsave, 0, sizeof(vrsave));
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vrsave.word = target->thread.vrsave;
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ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, &vrsave,
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33 * sizeof(vector128), -1);
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}
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return ret;
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}
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static int vr_set(struct task_struct *target, const struct user_regset *regset,
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unsigned int pos, unsigned int count,
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const void *kbuf, const void __user *ubuf)
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{
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int ret;
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flush_altivec_to_thread(target);
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BUILD_BUG_ON(offsetof(struct thread_struct, vscr) !=
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offsetof(struct thread_struct, vr[32]));
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
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&target->thread.vr, 0, 33 * sizeof(vector128));
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if (!ret && count > 0) {
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/*
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* We use only the first word of vrsave.
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*/
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union {
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elf_vrreg_t reg;
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u32 word;
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} vrsave;
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memset(&vrsave, 0, sizeof(vrsave));
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vrsave.word = target->thread.vrsave;
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ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &vrsave,
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33 * sizeof(vector128), -1);
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if (!ret)
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target->thread.vrsave = vrsave.word;
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}
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return ret;
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}
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2007-06-03 23:15:44 -06:00
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#endif /* CONFIG_ALTIVEC */
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#ifdef CONFIG_SPE
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/*
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* For get_evrregs/set_evrregs functions 'data' has the following layout:
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*
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* struct {
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* u32 evr[32];
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* u64 acc;
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* u32 spefscr;
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* }
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*/
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2007-12-20 04:57:48 -07:00
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|
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static int evr_active(struct task_struct *target,
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|
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const struct user_regset *regset)
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2007-06-03 23:15:44 -06:00
|
|
|
{
|
2007-12-20 04:57:48 -07:00
|
|
|
flush_spe_to_thread(target);
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return target->thread.used_spe ? regset->n : 0;
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}
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2007-06-03 23:15:44 -06:00
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2007-12-20 04:57:48 -07:00
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|
|
static int evr_get(struct task_struct *target, const struct user_regset *regset,
|
|
|
|
unsigned int pos, unsigned int count,
|
|
|
|
void *kbuf, void __user *ubuf)
|
|
|
|
{
|
|
|
|
int ret;
|
2007-06-03 23:15:44 -06:00
|
|
|
|
2007-12-20 04:57:48 -07:00
|
|
|
flush_spe_to_thread(target);
|
2007-06-03 23:15:44 -06:00
|
|
|
|
2007-12-20 04:57:48 -07:00
|
|
|
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
|
|
|
|
&target->thread.evr,
|
|
|
|
0, sizeof(target->thread.evr));
|
2007-06-03 23:15:44 -06:00
|
|
|
|
2007-12-20 04:57:48 -07:00
|
|
|
BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) !=
|
|
|
|
offsetof(struct thread_struct, spefscr));
|
|
|
|
|
|
|
|
if (!ret)
|
|
|
|
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
|
|
|
|
&target->thread.acc,
|
|
|
|
sizeof(target->thread.evr), -1);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int evr_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;
|
|
|
|
|
|
|
|
flush_spe_to_thread(target);
|
|
|
|
|
|
|
|
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
|
|
|
|
&target->thread.evr,
|
|
|
|
0, sizeof(target->thread.evr));
|
2007-06-03 23:15:44 -06:00
|
|
|
|
2007-12-20 04:57:48 -07:00
|
|
|
BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) !=
|
|
|
|
offsetof(struct thread_struct, spefscr));
|
|
|
|
|
|
|
|
if (!ret)
|
|
|
|
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
|
|
|
|
&target->thread.acc,
|
|
|
|
sizeof(target->thread.evr), -1);
|
|
|
|
|
|
|
|
return ret;
|
2007-06-03 23:15:44 -06:00
|
|
|
}
|
|
|
|
#endif /* CONFIG_SPE */
|
|
|
|
|
|
|
|
|
2007-12-20 04:58:00 -07:00
|
|
|
/*
|
|
|
|
* These are our native regset flavors.
|
|
|
|
*/
|
|
|
|
enum powerpc_regset {
|
|
|
|
REGSET_GPR,
|
|
|
|
REGSET_FPR,
|
|
|
|
#ifdef CONFIG_ALTIVEC
|
|
|
|
REGSET_VMX,
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_SPE
|
|
|
|
REGSET_SPE,
|
|
|
|
#endif
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct user_regset native_regsets[] = {
|
|
|
|
[REGSET_GPR] = {
|
|
|
|
.core_note_type = NT_PRSTATUS, .n = ELF_NGREG,
|
|
|
|
.size = sizeof(long), .align = sizeof(long),
|
|
|
|
.get = gpr_get, .set = gpr_set
|
|
|
|
},
|
|
|
|
[REGSET_FPR] = {
|
|
|
|
.core_note_type = NT_PRFPREG, .n = ELF_NFPREG,
|
|
|
|
.size = sizeof(double), .align = sizeof(double),
|
|
|
|
.get = fpr_get, .set = fpr_set
|
|
|
|
},
|
|
|
|
#ifdef CONFIG_ALTIVEC
|
|
|
|
[REGSET_VMX] = {
|
|
|
|
.core_note_type = NT_PPC_VMX, .n = 34,
|
|
|
|
.size = sizeof(vector128), .align = sizeof(vector128),
|
|
|
|
.active = vr_active, .get = vr_get, .set = vr_set
|
|
|
|
},
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_SPE
|
|
|
|
[REGSET_SPE] = {
|
|
|
|
.n = 35,
|
|
|
|
.size = sizeof(u32), .align = sizeof(u32),
|
|
|
|
.active = evr_active, .get = evr_get, .set = evr_set
|
|
|
|
},
|
|
|
|
#endif
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct user_regset_view user_ppc_native_view = {
|
|
|
|
.name = UTS_MACHINE, .e_machine = ELF_ARCH, .ei_osabi = ELF_OSABI,
|
|
|
|
.regsets = native_regsets, .n = ARRAY_SIZE(native_regsets)
|
|
|
|
};
|
|
|
|
|
2007-12-20 04:58:08 -07:00
|
|
|
#ifdef CONFIG_PPC64
|
|
|
|
#include <linux/compat.h>
|
|
|
|
|
|
|
|
static int gpr32_get(struct task_struct *target,
|
|
|
|
const struct user_regset *regset,
|
|
|
|
unsigned int pos, unsigned int count,
|
|
|
|
void *kbuf, void __user *ubuf)
|
|
|
|
{
|
|
|
|
const unsigned long *regs = &target->thread.regs->gpr[0];
|
|
|
|
compat_ulong_t *k = kbuf;
|
|
|
|
compat_ulong_t __user *u = ubuf;
|
|
|
|
compat_ulong_t reg;
|
|
|
|
|
|
|
|
if (target->thread.regs == NULL)
|
|
|
|
return -EIO;
|
|
|
|
|
|
|
|
CHECK_FULL_REGS(target->thread.regs);
|
|
|
|
|
|
|
|
pos /= sizeof(reg);
|
|
|
|
count /= sizeof(reg);
|
|
|
|
|
|
|
|
if (kbuf)
|
|
|
|
for (; count > 0 && pos < PT_MSR; --count)
|
|
|
|
*k++ = regs[pos++];
|
|
|
|
else
|
|
|
|
for (; count > 0 && pos < PT_MSR; --count)
|
|
|
|
if (__put_user((compat_ulong_t) regs[pos++], u++))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
if (count > 0 && pos == PT_MSR) {
|
|
|
|
reg = get_user_msr(target);
|
|
|
|
if (kbuf)
|
|
|
|
*k++ = reg;
|
|
|
|
else if (__put_user(reg, u++))
|
|
|
|
return -EFAULT;
|
|
|
|
++pos;
|
|
|
|
--count;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (kbuf)
|
|
|
|
for (; count > 0 && pos < PT_REGS_COUNT; --count)
|
|
|
|
*k++ = regs[pos++];
|
|
|
|
else
|
|
|
|
for (; count > 0 && pos < PT_REGS_COUNT; --count)
|
|
|
|
if (__put_user((compat_ulong_t) regs[pos++], u++))
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
kbuf = k;
|
|
|
|
ubuf = u;
|
|
|
|
pos *= sizeof(reg);
|
|
|
|
count *= sizeof(reg);
|
|
|
|
return user_regset_copyout_zero(&pos, &count, &kbuf, &ubuf,
|
|
|
|
PT_REGS_COUNT * sizeof(reg), -1);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int gpr32_set(struct task_struct *target,
|
|
|
|
const struct user_regset *regset,
|
|
|
|
unsigned int pos, unsigned int count,
|
|
|
|
const void *kbuf, const void __user *ubuf)
|
|
|
|
{
|
|
|
|
unsigned long *regs = &target->thread.regs->gpr[0];
|
|
|
|
const compat_ulong_t *k = kbuf;
|
|
|
|
const compat_ulong_t __user *u = ubuf;
|
|
|
|
compat_ulong_t reg;
|
|
|
|
|
|
|
|
if (target->thread.regs == NULL)
|
|
|
|
return -EIO;
|
|
|
|
|
|
|
|
CHECK_FULL_REGS(target->thread.regs);
|
|
|
|
|
|
|
|
pos /= sizeof(reg);
|
|
|
|
count /= sizeof(reg);
|
|
|
|
|
|
|
|
if (kbuf)
|
|
|
|
for (; count > 0 && pos < PT_MSR; --count)
|
|
|
|
regs[pos++] = *k++;
|
|
|
|
else
|
|
|
|
for (; count > 0 && pos < PT_MSR; --count) {
|
|
|
|
if (__get_user(reg, u++))
|
|
|
|
return -EFAULT;
|
|
|
|
regs[pos++] = reg;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
if (count > 0 && pos == PT_MSR) {
|
|
|
|
if (kbuf)
|
|
|
|
reg = *k++;
|
|
|
|
else if (__get_user(reg, u++))
|
|
|
|
return -EFAULT;
|
|
|
|
set_user_msr(target, reg);
|
|
|
|
++pos;
|
|
|
|
--count;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (kbuf)
|
|
|
|
for (; count > 0 && pos <= PT_MAX_PUT_REG; --count)
|
|
|
|
regs[pos++] = *k++;
|
|
|
|
else
|
|
|
|
for (; count > 0 && pos <= PT_MAX_PUT_REG; --count) {
|
|
|
|
if (__get_user(reg, u++))
|
|
|
|
return -EFAULT;
|
|
|
|
regs[pos++] = reg;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (count > 0 && pos == PT_TRAP) {
|
|
|
|
if (kbuf)
|
|
|
|
reg = *k++;
|
|
|
|
else if (__get_user(reg, u++))
|
|
|
|
return -EFAULT;
|
|
|
|
set_user_trap(target, reg);
|
|
|
|
++pos;
|
|
|
|
--count;
|
|
|
|
}
|
|
|
|
|
|
|
|
kbuf = k;
|
|
|
|
ubuf = u;
|
|
|
|
pos *= sizeof(reg);
|
|
|
|
count *= sizeof(reg);
|
|
|
|
return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
|
|
|
|
(PT_TRAP + 1) * sizeof(reg), -1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* These are the regset flavors matching the CONFIG_PPC32 native set.
|
|
|
|
*/
|
|
|
|
static const struct user_regset compat_regsets[] = {
|
|
|
|
[REGSET_GPR] = {
|
|
|
|
.core_note_type = NT_PRSTATUS, .n = ELF_NGREG,
|
|
|
|
.size = sizeof(compat_long_t), .align = sizeof(compat_long_t),
|
|
|
|
.get = gpr32_get, .set = gpr32_set
|
|
|
|
},
|
|
|
|
[REGSET_FPR] = {
|
|
|
|
.core_note_type = NT_PRFPREG, .n = ELF_NFPREG,
|
|
|
|
.size = sizeof(double), .align = sizeof(double),
|
|
|
|
.get = fpr_get, .set = fpr_set
|
|
|
|
},
|
|
|
|
#ifdef CONFIG_ALTIVEC
|
|
|
|
[REGSET_VMX] = {
|
|
|
|
.core_note_type = NT_PPC_VMX, .n = 34,
|
|
|
|
.size = sizeof(vector128), .align = sizeof(vector128),
|
|
|
|
.active = vr_active, .get = vr_get, .set = vr_set
|
|
|
|
},
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_SPE
|
|
|
|
[REGSET_SPE] = {
|
2008-01-02 18:05:48 -07:00
|
|
|
.core_note_type = NT_PPC_SPE, .n = 35,
|
2007-12-20 04:58:08 -07:00
|
|
|
.size = sizeof(u32), .align = sizeof(u32),
|
|
|
|
.active = evr_active, .get = evr_get, .set = evr_set
|
|
|
|
},
|
|
|
|
#endif
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct user_regset_view user_ppc_compat_view = {
|
|
|
|
.name = "ppc", .e_machine = EM_PPC, .ei_osabi = ELF_OSABI,
|
|
|
|
.regsets = compat_regsets, .n = ARRAY_SIZE(compat_regsets)
|
|
|
|
};
|
|
|
|
#endif /* CONFIG_PPC64 */
|
|
|
|
|
2007-12-20 04:58:00 -07:00
|
|
|
const struct user_regset_view *task_user_regset_view(struct task_struct *task)
|
|
|
|
{
|
2007-12-20 04:58:08 -07:00
|
|
|
#ifdef CONFIG_PPC64
|
|
|
|
if (test_tsk_thread_flag(task, TIF_32BIT))
|
|
|
|
return &user_ppc_compat_view;
|
|
|
|
#endif
|
2007-12-20 04:58:00 -07:00
|
|
|
return &user_ppc_native_view;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2008-01-30 05:30:51 -07:00
|
|
|
void user_enable_single_step(struct task_struct *task)
|
2007-06-03 23:15:44 -06:00
|
|
|
{
|
|
|
|
struct pt_regs *regs = task->thread.regs;
|
|
|
|
|
|
|
|
if (regs != NULL) {
|
|
|
|
#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
|
|
|
|
task->thread.dbcr0 = DBCR0_IDM | DBCR0_IC;
|
|
|
|
regs->msr |= MSR_DE;
|
|
|
|
#else
|
|
|
|
regs->msr |= MSR_SE;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
set_tsk_thread_flag(task, TIF_SINGLESTEP);
|
|
|
|
}
|
|
|
|
|
2008-01-30 05:30:51 -07:00
|
|
|
void user_disable_single_step(struct task_struct *task)
|
2007-06-03 23:15:44 -06:00
|
|
|
{
|
|
|
|
struct pt_regs *regs = task->thread.regs;
|
|
|
|
|
|
|
|
if (regs != NULL) {
|
|
|
|
#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
|
|
|
|
task->thread.dbcr0 = 0;
|
|
|
|
regs->msr &= ~MSR_DE;
|
|
|
|
#else
|
|
|
|
regs->msr &= ~MSR_SE;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
clear_tsk_thread_flag(task, TIF_SINGLESTEP);
|
|
|
|
}
|
|
|
|
|
2007-06-03 23:15:47 -06:00
|
|
|
static int ptrace_set_debugreg(struct task_struct *task, unsigned long addr,
|
|
|
|
unsigned long data)
|
|
|
|
{
|
|
|
|
/* We only support one DABR and no IABRS at the moment */
|
|
|
|
if (addr > 0)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
/* The bottom 3 bits are flags */
|
|
|
|
if ((data & ~0x7UL) >= TASK_SIZE)
|
|
|
|
return -EIO;
|
|
|
|
|
|
|
|
/* Ensure translation is on */
|
|
|
|
if (data && !(data & DABR_TRANSLATION))
|
|
|
|
return -EIO;
|
|
|
|
|
|
|
|
task->thread.dabr = data;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/*
|
|
|
|
* Called by kernel/ptrace.c when detaching..
|
|
|
|
*
|
|
|
|
* Make sure single step bits etc are not set.
|
|
|
|
*/
|
|
|
|
void ptrace_disable(struct task_struct *child)
|
|
|
|
{
|
|
|
|
/* make sure the single step bit is not set. */
|
2008-01-30 05:30:51 -07:00
|
|
|
user_disable_single_step(child);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
[POWERPC] ptrace updates & new, better requests
The powerpc ptrace interface is dodgy at best. We have defined our
"own" versions of GETREGS/SETREGS/GETFPREGS/SETFPREGS that strangely
take arguments in reverse order from other archs (in addition to having
different request numbers) and have subtle issue, like not accessing
all of the registers in their respective categories.
This patch moves the implementation of those to a separate function
in order to facilitate their deprecation in the future, and provides
new ptrace requests that mirror the x86 and sparc ones and use the
same numbers:
PTRACE_GETREGS : returns an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... There's a compat version
for 32 bits that returns a 32 bits compatible
pt_regs (44 uints)
PTRACE_SETREGS : sets an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... Some registers cannot be
written to and will just be dropped, this is the
same as with POKEUSR, that is anything above MQ
on 32 bits and CCR on 64 bits. There is a compat
version as well.
PTRACE_GETFPREGS : returns all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
PTRACE_SETFPREGS : sets all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
And two that only exist on 64 bits kernels:
PTRACE_GETREGS64 : Same as PTRACE_GETREGS, except there is no compat
function, a 32 bits process will obtain the full 64
bits registers
PTRACE_SETREGS64 : Same as PTRACE_SETREGS, except there is no compat
function, a 32 bits process will set the full 64
bits registers
The two later ones makes things easier to have a 32 bits debugger on a
64 bits program (or on a 32 bits program that uses the full 64 bits of
the GPRs, which is possible though has issues that will be fixed in a
later patch).
Finally, while at it, the patch removes a whole bunch of code duplication
between ptrace32.c and ptrace.c, in large part by having the former call
into the later for all requests that don't need any special "compat"
treatment.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-06-03 23:15:43 -06:00
|
|
|
/*
|
|
|
|
* Here are the old "legacy" powerpc specific getregs/setregs ptrace calls,
|
|
|
|
* we mark them as obsolete now, they will be removed in a future version
|
|
|
|
*/
|
|
|
|
static long arch_ptrace_old(struct task_struct *child, long request, long addr,
|
|
|
|
long data)
|
|
|
|
{
|
2007-12-20 04:58:36 -07:00
|
|
|
switch (request) {
|
|
|
|
case PPC_PTRACE_GETREGS: /* Get GPRs 0 - 31. */
|
|
|
|
return copy_regset_to_user(child, &user_ppc_native_view,
|
|
|
|
REGSET_GPR, 0, 32 * sizeof(long),
|
|
|
|
(void __user *) data);
|
|
|
|
|
|
|
|
case PPC_PTRACE_SETREGS: /* Set GPRs 0 - 31. */
|
|
|
|
return copy_regset_from_user(child, &user_ppc_native_view,
|
|
|
|
REGSET_GPR, 0, 32 * sizeof(long),
|
|
|
|
(const void __user *) data);
|
|
|
|
|
|
|
|
case PPC_PTRACE_GETFPREGS: /* Get FPRs 0 - 31. */
|
|
|
|
return copy_regset_to_user(child, &user_ppc_native_view,
|
|
|
|
REGSET_FPR, 0, 32 * sizeof(double),
|
|
|
|
(void __user *) data);
|
|
|
|
|
|
|
|
case PPC_PTRACE_SETFPREGS: /* Set FPRs 0 - 31. */
|
|
|
|
return copy_regset_from_user(child, &user_ppc_native_view,
|
|
|
|
REGSET_FPR, 0, 32 * sizeof(double),
|
|
|
|
(const void __user *) data);
|
[POWERPC] ptrace updates & new, better requests
The powerpc ptrace interface is dodgy at best. We have defined our
"own" versions of GETREGS/SETREGS/GETFPREGS/SETFPREGS that strangely
take arguments in reverse order from other archs (in addition to having
different request numbers) and have subtle issue, like not accessing
all of the registers in their respective categories.
This patch moves the implementation of those to a separate function
in order to facilitate their deprecation in the future, and provides
new ptrace requests that mirror the x86 and sparc ones and use the
same numbers:
PTRACE_GETREGS : returns an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... There's a compat version
for 32 bits that returns a 32 bits compatible
pt_regs (44 uints)
PTRACE_SETREGS : sets an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... Some registers cannot be
written to and will just be dropped, this is the
same as with POKEUSR, that is anything above MQ
on 32 bits and CCR on 64 bits. There is a compat
version as well.
PTRACE_GETFPREGS : returns all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
PTRACE_SETFPREGS : sets all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
And two that only exist on 64 bits kernels:
PTRACE_GETREGS64 : Same as PTRACE_GETREGS, except there is no compat
function, a 32 bits process will obtain the full 64
bits registers
PTRACE_SETREGS64 : Same as PTRACE_SETREGS, except there is no compat
function, a 32 bits process will set the full 64
bits registers
The two later ones makes things easier to have a 32 bits debugger on a
64 bits program (or on a 32 bits program that uses the full 64 bits of
the GPRs, which is possible though has issues that will be fixed in a
later patch).
Finally, while at it, the patch removes a whole bunch of code duplication
between ptrace32.c and ptrace.c, in large part by having the former call
into the later for all requests that don't need any special "compat"
treatment.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-06-03 23:15:43 -06:00
|
|
|
}
|
|
|
|
|
2007-12-20 04:58:36 -07:00
|
|
|
return -EPERM;
|
[POWERPC] ptrace updates & new, better requests
The powerpc ptrace interface is dodgy at best. We have defined our
"own" versions of GETREGS/SETREGS/GETFPREGS/SETFPREGS that strangely
take arguments in reverse order from other archs (in addition to having
different request numbers) and have subtle issue, like not accessing
all of the registers in their respective categories.
This patch moves the implementation of those to a separate function
in order to facilitate their deprecation in the future, and provides
new ptrace requests that mirror the x86 and sparc ones and use the
same numbers:
PTRACE_GETREGS : returns an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... There's a compat version
for 32 bits that returns a 32 bits compatible
pt_regs (44 uints)
PTRACE_SETREGS : sets an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... Some registers cannot be
written to and will just be dropped, this is the
same as with POKEUSR, that is anything above MQ
on 32 bits and CCR on 64 bits. There is a compat
version as well.
PTRACE_GETFPREGS : returns all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
PTRACE_SETFPREGS : sets all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
And two that only exist on 64 bits kernels:
PTRACE_GETREGS64 : Same as PTRACE_GETREGS, except there is no compat
function, a 32 bits process will obtain the full 64
bits registers
PTRACE_SETREGS64 : Same as PTRACE_SETREGS, except there is no compat
function, a 32 bits process will set the full 64
bits registers
The two later ones makes things easier to have a 32 bits debugger on a
64 bits program (or on a 32 bits program that uses the full 64 bits of
the GPRs, which is possible though has issues that will be fixed in a
later patch).
Finally, while at it, the patch removes a whole bunch of code duplication
between ptrace32.c and ptrace.c, in large part by having the former call
into the later for all requests that don't need any special "compat"
treatment.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-06-03 23:15:43 -06:00
|
|
|
}
|
|
|
|
|
2005-11-07 01:59:47 -07:00
|
|
|
long arch_ptrace(struct task_struct *child, long request, long addr, long data)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
int ret = -EPERM;
|
|
|
|
|
|
|
|
switch (request) {
|
|
|
|
/* read the word at location addr in the USER area. */
|
|
|
|
case PTRACE_PEEKUSR: {
|
|
|
|
unsigned long index, tmp;
|
|
|
|
|
|
|
|
ret = -EIO;
|
|
|
|
/* convert to index and check */
|
2005-10-12 23:52:04 -06:00
|
|
|
#ifdef CONFIG_PPC32
|
2005-04-16 16:20:36 -06:00
|
|
|
index = (unsigned long) addr >> 2;
|
2005-10-12 23:52:04 -06:00
|
|
|
if ((addr & 3) || (index > PT_FPSCR)
|
|
|
|
|| (child->thread.regs == NULL))
|
|
|
|
#else
|
|
|
|
index = (unsigned long) addr >> 3;
|
|
|
|
if ((addr & 7) || (index > PT_FPSCR))
|
|
|
|
#endif
|
2005-04-16 16:20:36 -06:00
|
|
|
break;
|
|
|
|
|
|
|
|
CHECK_FULL_REGS(child->thread.regs);
|
|
|
|
if (index < PT_FPR0) {
|
2007-06-03 23:15:44 -06:00
|
|
|
tmp = ptrace_get_reg(child, (int) index);
|
2005-04-16 16:20:36 -06:00
|
|
|
} else {
|
2005-10-12 23:52:04 -06:00
|
|
|
flush_fp_to_thread(child);
|
2005-04-16 16:20:36 -06:00
|
|
|
tmp = ((unsigned long *)child->thread.fpr)[index - PT_FPR0];
|
|
|
|
}
|
|
|
|
ret = put_user(tmp,(unsigned long __user *) data);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* write the word at location addr in the USER area */
|
|
|
|
case PTRACE_POKEUSR: {
|
|
|
|
unsigned long index;
|
|
|
|
|
|
|
|
ret = -EIO;
|
|
|
|
/* convert to index and check */
|
2005-10-12 23:52:04 -06:00
|
|
|
#ifdef CONFIG_PPC32
|
2005-04-16 16:20:36 -06:00
|
|
|
index = (unsigned long) addr >> 2;
|
2005-10-12 23:52:04 -06:00
|
|
|
if ((addr & 3) || (index > PT_FPSCR)
|
|
|
|
|| (child->thread.regs == NULL))
|
|
|
|
#else
|
|
|
|
index = (unsigned long) addr >> 3;
|
|
|
|
if ((addr & 7) || (index > PT_FPSCR))
|
|
|
|
#endif
|
2005-04-16 16:20:36 -06:00
|
|
|
break;
|
|
|
|
|
|
|
|
CHECK_FULL_REGS(child->thread.regs);
|
|
|
|
if (index < PT_FPR0) {
|
2007-06-03 23:15:44 -06:00
|
|
|
ret = ptrace_put_reg(child, index, data);
|
2005-04-16 16:20:36 -06:00
|
|
|
} else {
|
2005-10-12 23:52:04 -06:00
|
|
|
flush_fp_to_thread(child);
|
2005-04-16 16:20:36 -06:00
|
|
|
((unsigned long *)child->thread.fpr)[index - PT_FPR0] = data;
|
|
|
|
ret = 0;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2005-10-12 23:52:04 -06:00
|
|
|
case PTRACE_GET_DEBUGREG: {
|
|
|
|
ret = -EINVAL;
|
|
|
|
/* We only support one DABR and no IABRS at the moment */
|
|
|
|
if (addr > 0)
|
|
|
|
break;
|
|
|
|
ret = put_user(child->thread.dabr,
|
|
|
|
(unsigned long __user *)data);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
case PTRACE_SET_DEBUGREG:
|
|
|
|
ret = ptrace_set_debugreg(child, addr, data);
|
|
|
|
break;
|
|
|
|
|
[POWERPC] ptrace updates & new, better requests
The powerpc ptrace interface is dodgy at best. We have defined our
"own" versions of GETREGS/SETREGS/GETFPREGS/SETFPREGS that strangely
take arguments in reverse order from other archs (in addition to having
different request numbers) and have subtle issue, like not accessing
all of the registers in their respective categories.
This patch moves the implementation of those to a separate function
in order to facilitate their deprecation in the future, and provides
new ptrace requests that mirror the x86 and sparc ones and use the
same numbers:
PTRACE_GETREGS : returns an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... There's a compat version
for 32 bits that returns a 32 bits compatible
pt_regs (44 uints)
PTRACE_SETREGS : sets an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... Some registers cannot be
written to and will just be dropped, this is the
same as with POKEUSR, that is anything above MQ
on 32 bits and CCR on 64 bits. There is a compat
version as well.
PTRACE_GETFPREGS : returns all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
PTRACE_SETFPREGS : sets all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
And two that only exist on 64 bits kernels:
PTRACE_GETREGS64 : Same as PTRACE_GETREGS, except there is no compat
function, a 32 bits process will obtain the full 64
bits registers
PTRACE_SETREGS64 : Same as PTRACE_SETREGS, except there is no compat
function, a 32 bits process will set the full 64
bits registers
The two later ones makes things easier to have a 32 bits debugger on a
64 bits program (or on a 32 bits program that uses the full 64 bits of
the GPRs, which is possible though has issues that will be fixed in a
later patch).
Finally, while at it, the patch removes a whole bunch of code duplication
between ptrace32.c and ptrace.c, in large part by having the former call
into the later for all requests that don't need any special "compat"
treatment.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-06-03 23:15:43 -06:00
|
|
|
#ifdef CONFIG_PPC64
|
|
|
|
case PTRACE_GETREGS64:
|
|
|
|
#endif
|
2007-12-20 04:58:36 -07:00
|
|
|
case PTRACE_GETREGS: /* Get all pt_regs from the child. */
|
|
|
|
return copy_regset_to_user(child, &user_ppc_native_view,
|
|
|
|
REGSET_GPR,
|
|
|
|
0, sizeof(struct pt_regs),
|
|
|
|
(void __user *) data);
|
2005-10-12 23:52:04 -06:00
|
|
|
|
[POWERPC] ptrace updates & new, better requests
The powerpc ptrace interface is dodgy at best. We have defined our
"own" versions of GETREGS/SETREGS/GETFPREGS/SETFPREGS that strangely
take arguments in reverse order from other archs (in addition to having
different request numbers) and have subtle issue, like not accessing
all of the registers in their respective categories.
This patch moves the implementation of those to a separate function
in order to facilitate their deprecation in the future, and provides
new ptrace requests that mirror the x86 and sparc ones and use the
same numbers:
PTRACE_GETREGS : returns an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... There's a compat version
for 32 bits that returns a 32 bits compatible
pt_regs (44 uints)
PTRACE_SETREGS : sets an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... Some registers cannot be
written to and will just be dropped, this is the
same as with POKEUSR, that is anything above MQ
on 32 bits and CCR on 64 bits. There is a compat
version as well.
PTRACE_GETFPREGS : returns all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
PTRACE_SETFPREGS : sets all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
And two that only exist on 64 bits kernels:
PTRACE_GETREGS64 : Same as PTRACE_GETREGS, except there is no compat
function, a 32 bits process will obtain the full 64
bits registers
PTRACE_SETREGS64 : Same as PTRACE_SETREGS, except there is no compat
function, a 32 bits process will set the full 64
bits registers
The two later ones makes things easier to have a 32 bits debugger on a
64 bits program (or on a 32 bits program that uses the full 64 bits of
the GPRs, which is possible though has issues that will be fixed in a
later patch).
Finally, while at it, the patch removes a whole bunch of code duplication
between ptrace32.c and ptrace.c, in large part by having the former call
into the later for all requests that don't need any special "compat"
treatment.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-06-03 23:15:43 -06:00
|
|
|
#ifdef CONFIG_PPC64
|
|
|
|
case PTRACE_SETREGS64:
|
|
|
|
#endif
|
2007-12-20 04:58:36 -07:00
|
|
|
case PTRACE_SETREGS: /* Set all gp regs in the child. */
|
|
|
|
return copy_regset_from_user(child, &user_ppc_native_view,
|
|
|
|
REGSET_GPR,
|
|
|
|
0, sizeof(struct pt_regs),
|
|
|
|
(const void __user *) data);
|
|
|
|
|
|
|
|
case PTRACE_GETFPREGS: /* Get the child FPU state (FPR0...31 + FPSCR) */
|
|
|
|
return copy_regset_to_user(child, &user_ppc_native_view,
|
|
|
|
REGSET_FPR,
|
|
|
|
0, sizeof(elf_fpregset_t),
|
|
|
|
(void __user *) data);
|
|
|
|
|
|
|
|
case PTRACE_SETFPREGS: /* Set the child FPU state (FPR0...31 + FPSCR) */
|
|
|
|
return copy_regset_from_user(child, &user_ppc_native_view,
|
|
|
|
REGSET_FPR,
|
|
|
|
0, sizeof(elf_fpregset_t),
|
|
|
|
(const void __user *) data);
|
2005-10-12 23:52:04 -06:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
#ifdef CONFIG_ALTIVEC
|
|
|
|
case PTRACE_GETVRREGS:
|
2007-12-20 04:58:36 -07:00
|
|
|
return copy_regset_to_user(child, &user_ppc_native_view,
|
|
|
|
REGSET_VMX,
|
|
|
|
0, (33 * sizeof(vector128) +
|
|
|
|
sizeof(u32)),
|
|
|
|
(void __user *) data);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
case PTRACE_SETVRREGS:
|
2007-12-20 04:58:36 -07:00
|
|
|
return copy_regset_from_user(child, &user_ppc_native_view,
|
|
|
|
REGSET_VMX,
|
|
|
|
0, (33 * sizeof(vector128) +
|
|
|
|
sizeof(u32)),
|
|
|
|
(const void __user *) data);
|
2005-04-16 16:20:36 -06:00
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_SPE
|
|
|
|
case PTRACE_GETEVRREGS:
|
|
|
|
/* Get the child spe register state. */
|
2007-12-20 04:58:36 -07:00
|
|
|
return copy_regset_to_user(child, &user_ppc_native_view,
|
|
|
|
REGSET_SPE, 0, 35 * sizeof(u32),
|
|
|
|
(void __user *) data);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
case PTRACE_SETEVRREGS:
|
|
|
|
/* Set the child spe register state. */
|
2007-12-20 04:58:36 -07:00
|
|
|
return copy_regset_from_user(child, &user_ppc_native_view,
|
|
|
|
REGSET_SPE, 0, 35 * sizeof(u32),
|
|
|
|
(const void __user *) data);
|
2005-04-16 16:20:36 -06:00
|
|
|
#endif
|
|
|
|
|
[POWERPC] ptrace updates & new, better requests
The powerpc ptrace interface is dodgy at best. We have defined our
"own" versions of GETREGS/SETREGS/GETFPREGS/SETFPREGS that strangely
take arguments in reverse order from other archs (in addition to having
different request numbers) and have subtle issue, like not accessing
all of the registers in their respective categories.
This patch moves the implementation of those to a separate function
in order to facilitate their deprecation in the future, and provides
new ptrace requests that mirror the x86 and sparc ones and use the
same numbers:
PTRACE_GETREGS : returns an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... There's a compat version
for 32 bits that returns a 32 bits compatible
pt_regs (44 uints)
PTRACE_SETREGS : sets an entire pt_regs (the whole thing,
not only the 32 GPRs, though that doesn't
include the FPRs etc... Some registers cannot be
written to and will just be dropped, this is the
same as with POKEUSR, that is anything above MQ
on 32 bits and CCR on 64 bits. There is a compat
version as well.
PTRACE_GETFPREGS : returns all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
PTRACE_SETFPREGS : sets all the FP registers -including- the FPSCR
that is 33 doubles (regardless of 32/64 bits)
And two that only exist on 64 bits kernels:
PTRACE_GETREGS64 : Same as PTRACE_GETREGS, except there is no compat
function, a 32 bits process will obtain the full 64
bits registers
PTRACE_SETREGS64 : Same as PTRACE_SETREGS, except there is no compat
function, a 32 bits process will set the full 64
bits registers
The two later ones makes things easier to have a 32 bits debugger on a
64 bits program (or on a 32 bits program that uses the full 64 bits of
the GPRs, which is possible though has issues that will be fixed in a
later patch).
Finally, while at it, the patch removes a whole bunch of code duplication
between ptrace32.c and ptrace.c, in large part by having the former call
into the later for all requests that don't need any special "compat"
treatment.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-06-03 23:15:43 -06:00
|
|
|
/* Old reverse args ptrace callss */
|
|
|
|
case PPC_PTRACE_GETREGS: /* Get GPRs 0 - 31. */
|
|
|
|
case PPC_PTRACE_SETREGS: /* Set GPRs 0 - 31. */
|
|
|
|
case PPC_PTRACE_GETFPREGS: /* Get FPRs 0 - 31. */
|
|
|
|
case PPC_PTRACE_SETFPREGS: /* Get FPRs 0 - 31. */
|
|
|
|
ret = arch_ptrace_old(child, request, addr, data);
|
|
|
|
break;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
default:
|
|
|
|
ret = ptrace_request(child, request, addr, data);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2005-05-08 08:56:09 -06:00
|
|
|
static void do_syscall_trace(void)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2005-05-08 08:56:09 -06:00
|
|
|
/* the 0x80 provides a way for the tracing parent to distinguish
|
|
|
|
between a syscall stop and SIGTRAP delivery */
|
2005-04-16 16:20:36 -06:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
}
|
2005-05-08 08:56:09 -06:00
|
|
|
|
|
|
|
void do_syscall_trace_enter(struct pt_regs *regs)
|
|
|
|
{
|
2005-10-12 23:52:04 -06:00
|
|
|
secure_computing(regs->gpr[0]);
|
|
|
|
|
2005-05-08 08:56:09 -06:00
|
|
|
if (test_thread_flag(TIF_SYSCALL_TRACE)
|
|
|
|
&& (current->ptrace & PT_PTRACED))
|
|
|
|
do_syscall_trace();
|
|
|
|
|
2007-01-13 18:38:18 -07:00
|
|
|
if (unlikely(current->audit_context)) {
|
|
|
|
#ifdef CONFIG_PPC64
|
|
|
|
if (!test_thread_flag(TIF_32BIT))
|
|
|
|
audit_syscall_entry(AUDIT_ARCH_PPC64,
|
|
|
|
regs->gpr[0],
|
|
|
|
regs->gpr[3], regs->gpr[4],
|
|
|
|
regs->gpr[5], regs->gpr[6]);
|
|
|
|
else
|
2005-10-12 23:52:04 -06:00
|
|
|
#endif
|
2007-01-13 18:38:18 -07:00
|
|
|
audit_syscall_entry(AUDIT_ARCH_PPC,
|
|
|
|
regs->gpr[0],
|
|
|
|
regs->gpr[3] & 0xffffffff,
|
|
|
|
regs->gpr[4] & 0xffffffff,
|
|
|
|
regs->gpr[5] & 0xffffffff,
|
|
|
|
regs->gpr[6] & 0xffffffff);
|
|
|
|
}
|
2005-05-08 08:56:09 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
void do_syscall_trace_leave(struct pt_regs *regs)
|
|
|
|
{
|
|
|
|
if (unlikely(current->audit_context))
|
2006-09-22 02:23:53 -06:00
|
|
|
audit_syscall_exit((regs->ccr&0x10000000)?AUDITSC_FAILURE:AUDITSC_SUCCESS,
|
2005-05-08 08:56:09 -06:00
|
|
|
regs->result);
|
|
|
|
|
2005-10-12 23:52:04 -06:00
|
|
|
if ((test_thread_flag(TIF_SYSCALL_TRACE)
|
2006-03-07 19:24:22 -07:00
|
|
|
|| test_thread_flag(TIF_SINGLESTEP))
|
2005-05-08 08:56:09 -06:00
|
|
|
&& (current->ptrace & PT_PTRACED))
|
|
|
|
do_syscall_trace();
|
|
|
|
}
|