165 lines
4.2 KiB
C
165 lines
4.2 KiB
C
/*
|
|
* 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
|
|
|
|
#include <linux/config.h>
|
|
#include <asm/system.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);
|
|
}
|
|
|
|
#ifdef CONFIG_ALTIVEC
|
|
/*
|
|
* Get/set all the altivec registers vr0..vr31, vscr, vrsave, in one go.
|
|
* The transfer totals 34 quadword. Quadwords 0-31 contain the
|
|
* corresponding vector registers. Quadword 32 contains the vscr as the
|
|
* last word (offset 12) within that quadword. Quadword 33 contains the
|
|
* vrsave as the first word (offset 0) within the quadword.
|
|
*
|
|
* This definition of the VMX state is compatible with the current PPC32
|
|
* ptrace interface. This allows signal handling and ptrace to use the
|
|
* same structures. This also simplifies the implementation of a bi-arch
|
|
* (combined (32- and 64-bit) gdb.
|
|
*/
|
|
|
|
/*
|
|
* Get contents of AltiVec register state in task TASK
|
|
*/
|
|
static inline int get_vrregs(unsigned long __user *data,
|
|
struct task_struct *task)
|
|
{
|
|
unsigned long regsize;
|
|
|
|
/* copy AltiVec registers VR[0] .. VR[31] */
|
|
regsize = 32 * sizeof(vector128);
|
|
if (copy_to_user(data, task->thread.vr, regsize))
|
|
return -EFAULT;
|
|
data += (regsize / sizeof(unsigned long));
|
|
|
|
/* copy VSCR */
|
|
regsize = 1 * sizeof(vector128);
|
|
if (copy_to_user(data, &task->thread.vscr, regsize))
|
|
return -EFAULT;
|
|
data += (regsize / sizeof(unsigned long));
|
|
|
|
/* copy VRSAVE */
|
|
if (put_user(task->thread.vrsave, (u32 __user *)data))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Write contents of AltiVec register state into task TASK.
|
|
*/
|
|
static inline int set_vrregs(struct task_struct *task,
|
|
unsigned long __user *data)
|
|
{
|
|
unsigned long regsize;
|
|
|
|
/* copy AltiVec registers VR[0] .. VR[31] */
|
|
regsize = 32 * sizeof(vector128);
|
|
if (copy_from_user(task->thread.vr, data, regsize))
|
|
return -EFAULT;
|
|
data += (regsize / sizeof(unsigned long));
|
|
|
|
/* copy VSCR */
|
|
regsize = 1 * sizeof(vector128);
|
|
if (copy_from_user(&task->thread.vscr, data, regsize))
|
|
return -EFAULT;
|
|
data += (regsize / sizeof(unsigned long));
|
|
|
|
/* copy VRSAVE */
|
|
if (get_user(task->thread.vrsave, (u32 __user *)data))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
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 /* _PPC64_PTRACE_COMMON_H */
|