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/*
* linux/arch/ppc64/kernel/ptrace-common.h
*
* Copyright (c) 2002 Stephen Rothwell, IBM Coproration
* Extracted from ptrace.c and ptrace32.c
*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file README.legal in the main directory of
* this archive for more details.
*/
#ifndef _PPC64_PTRACE_COMMON_H
#define _PPC64_PTRACE_COMMON_H
/*
* Set of msr bits that gdb can change on behalf of a process.
*/
#define MSR_DEBUGCHANGE (MSR_FE0 | MSR_SE | MSR_BE | MSR_FE1)
/*
* Get contents of register REGNO in task TASK.
*/
static inline unsigned long get_reg(struct task_struct *task, int regno)
{
unsigned long tmp = 0;
/*
* Put the correct FP bits in, they might be wrong as a result
* of our lazy FP restore.
*/
if (regno == PT_MSR) {
tmp = ((unsigned long *)task->thread.regs)[PT_MSR];
tmp |= task->thread.fpexc_mode;
} else if (regno < (sizeof(struct pt_regs) / sizeof(unsigned long))) {
tmp = ((unsigned long *)task->thread.regs)[regno];
}
return tmp;
}
/*
* Write contents of register REGNO in task TASK.
*/
static inline int put_reg(struct task_struct *task, int regno,
unsigned long data)
{
if (regno < PT_SOFTE) {
if (regno == PT_MSR)
data = (data & MSR_DEBUGCHANGE)
| (task->thread.regs->msr & ~MSR_DEBUGCHANGE);
((unsigned long *)task->thread.regs)[regno] = data;
return 0;
}
return -EIO;
}
static inline void set_single_step(struct task_struct *task)
{
struct pt_regs *regs = task->thread.regs;
if (regs != NULL)
regs->msr |= MSR_SE;
set_ti_thread_flag(task->thread_info, TIF_SINGLESTEP);
}
static inline void clear_single_step(struct task_struct *task)
{
struct pt_regs *regs = task->thread.regs;
if (regs != NULL)
regs->msr &= ~MSR_SE;
clear_ti_thread_flag(task->thread_info, TIF_SINGLESTEP);
}
#endif /* _PPC64_PTRACE_COMMON_H */
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