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ptrace.h

/* ptrace.h: ptrace() relevant definitions
 *
 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */
#ifndef _ASM_PTRACE_H
#define _ASM_PTRACE_H

#include <asm/registers.h>
#ifdef __KERNEL__
#include <asm/irq_regs.h>

#define in_syscall(regs) (((regs)->tbr & TBR_TT) == TBR_TT_TRAP0)
#endif


#define PT_PSR          0
#define     PT_ISR            1
#define PT_CCR          2
#define PT_CCCR         3
#define PT_LR           4
#define PT_LCR          5
#define PT_PC           6

#define PT__STATUS      7     /* exception status */
#define PT_SYSCALLNO    8     /* syscall number or -1 */
#define PT_ORIG_GR8     9     /* saved GR8 for signal handling */
#define PT_GNER0  10
#define PT_GNER1  11
#define PT_IACC0H 12
#define PT_IACC0L 13

#define PT_GR(j)  ( 14 + (j)) /* GRj for 0<=j<=63 */
#define PT_FR(j)  ( 78 + (j)) /* FRj for 0<=j<=63 */
#define PT_FNER(j)      (142 + (j)) /* FNERj for 0<=j<=1 */
#define PT_MSR(j) (144 + (j)) /* MSRj for 0<=j<=2 */
#define PT_ACC(j) (146 + (j)) /* ACCj for 0<=j<=7 */
#define PT_ACCG(jklm)   (154 + (jklm))    /* ACCGjklm for 0<=jklm<=1 (reads four regs per slot) */
#define PT_FSR(j) (156 + (j)) /* FSRj for 0<=j<=0 */
#define PT__GPEND 78
#define PT__END         157

#define PT_TBR          PT_GR(0)
#define PT_SP           PT_GR(1)
#define PT_FP           PT_GR(2)
#define PT_PREV_FRAME   PT_GR(28)   /* previous exception frame pointer (old gr28 value) */
#define PT_CURR_TASK    PT_GR(29)   /* current task */


/* Arbitrarily choose the same ptrace numbers as used by the Sparc code. */
#define PTRACE_GETREGS        12
#define PTRACE_SETREGS        13
#define PTRACE_GETFPREGS      14
#define PTRACE_SETFPREGS      15
#define PTRACE_GETFDPIC       31    /* get the ELF fdpic loadmap address */

#define PTRACE_GETFDPIC_EXEC  0     /* [addr] request the executable loadmap */
#define PTRACE_GETFDPIC_INTERP      1     /* [addr] request the interpreter loadmap */

#ifdef __KERNEL__
#ifndef __ASSEMBLY__

struct task_struct;

/*
 * we dedicate GR28 to keeping a pointer to the current exception frame
 * - gr28 is destroyed on entry to the kernel from userspace
 */
register struct pt_regs *__frame asm("gr28");

#define user_mode(regs)             (!((regs)->psr & PSR_S))
#define instruction_pointer(regs)   ((regs)->pc)
#define user_stack_pointer(regs)    ((regs)->sp)

extern unsigned long user_stack(const struct pt_regs *);
extern void show_regs(struct pt_regs *);
#define profile_pc(regs) ((regs)->pc)

#define task_pt_regs(task) ((task)->thread.frame0)

#define arch_has_single_step()      (1)

#endif /* !__ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* _ASM_PTRACE_H */

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