73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
/*
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* linux/arch/ppc64/kernel/ptrace-common.h
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*
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* Copyright (c) 2002 Stephen Rothwell, IBM Coproration
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* Extracted from ptrace.c and ptrace32.c
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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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#ifndef _PPC64_PTRACE_COMMON_H
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#define _PPC64_PTRACE_COMMON_H
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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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#define MSR_DEBUGCHANGE (MSR_FE0 | MSR_SE | MSR_BE | MSR_FE1)
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/*
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* Get contents of register REGNO in task TASK.
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*/
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static inline unsigned long get_reg(struct task_struct *task, int regno)
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{
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unsigned long tmp = 0;
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/*
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* Put the correct FP bits in, they might be wrong as a result
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* of our lazy FP restore.
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*/
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if (regno == PT_MSR) {
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tmp = ((unsigned long *)task->thread.regs)[PT_MSR];
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tmp |= task->thread.fpexc_mode;
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} else if (regno < (sizeof(struct pt_regs) / sizeof(unsigned long))) {
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tmp = ((unsigned long *)task->thread.regs)[regno];
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}
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return tmp;
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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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static inline int put_reg(struct task_struct *task, int regno,
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unsigned long data)
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{
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if (regno < PT_SOFTE) {
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if (regno == PT_MSR)
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data = (data & MSR_DEBUGCHANGE)
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| (task->thread.regs->msr & ~MSR_DEBUGCHANGE);
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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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static inline void set_single_step(struct task_struct *task)
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{
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struct pt_regs *regs = task->thread.regs;
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if (regs != NULL)
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regs->msr |= MSR_SE;
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set_ti_thread_flag(task->thread_info, TIF_SINGLESTEP);
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}
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static inline void clear_single_step(struct task_struct *task)
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{
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struct pt_regs *regs = task->thread.regs;
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if (regs != NULL)
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regs->msr &= ~MSR_SE;
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clear_ti_thread_flag(task->thread_info, TIF_SINGLESTEP);
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}
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#endif /* _PPC64_PTRACE_COMMON_H */
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