[mirror_ubuntu-artful-kernel.git] / arch / powerpc / kernel / ptrace-ppc64.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 _POWERPC_PTRACE_PPC64_H
#define _POWERPC_PTRACE_PPC64_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)

/*
 * Max register writeable via put_reg
 */
#define PT_MAX_PUT_REG	PT_CCR

/*
 * Munging of MSR on return from get_regs
 *
 * Put the correct FP bits in, they might be wrong as a result
 * of our lazy FP restore.
 */

#define PT_MUNGE_MSR(msr, task)	({ (msr) | (task)->thread.fpexc_mode; })

static inline 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;
}

#endif /* _POWERPC_PTRACE_PPC64_H */
Commit	Line	Data
acd89828 BH	1	/*
	2	* Copyright (c) 2002 Stephen Rothwell, IBM Coproration
	3	* Extracted from ptrace.c and ptrace32.c
	4	*
	5	* This file is subject to the terms and conditions of the GNU General
	6	* Public License. See the file README.legal in the main directory of
	7	* this archive for more details.
	8	*/
	9
	10	#ifndef _POWERPC_PTRACE_PPC64_H
	11	#define _POWERPC_PTRACE_PPC64_H
	12
	13	/*
	14	* Set of msr bits that gdb can change on behalf of a process.
	15	*/
	16	#define MSR_DEBUGCHANGE (MSR_FE0 \| MSR_SE \| MSR_BE \| MSR_FE1)
	17
	18	/*
	19	* Max register writeable via put_reg
	20	*/
	21	#define PT_MAX_PUT_REG PT_CCR
	22
	23	/*
	24	* Munging of MSR on return from get_regs
	25	*
	26	* Put the correct FP bits in, they might be wrong as a result
	27	* of our lazy FP restore.
	28	*/
	29
	30	#define PT_MUNGE_MSR(msr, task) ({ (msr) \| (task)->thread.fpexc_mode; })
	31
	32	static inline int ptrace_set_debugreg(struct task_struct *task,
	33	unsigned long addr, unsigned long data)
	34	{
	35	/* We only support one DABR and no IABRS at the moment */
	36	if (addr > 0)
	37	return -EINVAL;
	38
	39	/* The bottom 3 bits are flags */
	40	if ((data & ~0x7UL) >= TASK_SIZE)
	41	return -EIO;
	42
	43	/* Ensure translation is on */
	44	if (data && !(data & DABR_TRANSLATION))
	45	return -EIO;
	46
	47	task->thread.dabr = data;
	48	return 0;
	49	}
	50
	51	#endif /* _POWERPC_PTRACE_PPC64_H */