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/*
* Copyright (C) 2013 Altera Corporation
* Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
* Copyright (C) 2004 Microtronix Datacom Ltd
*
* based on m68k asm/processor.h
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#ifndef _ASM_NIOS2_PTRACE_H
#define _ASM_NIOS2_PTRACE_H
#include <uapi/asm/ptrace.h>
/* This struct defines the way the registers are stored on the
stack during a system call. */
#ifndef __ASSEMBLY__
struct pt_regs {
unsigned long r8; /* r8-r15 Caller-saved GP registers */
unsigned long r9;
unsigned long r10;
unsigned long r11;
unsigned long r12;
unsigned long r13;
unsigned long r14;
unsigned long r15;
unsigned long r1; /* Assembler temporary */
unsigned long r2; /* Retval LS 32bits */
unsigned long r3; /* Retval MS 32bits */
unsigned long r4; /* r4-r7 Register arguments */
unsigned long r5;
unsigned long r6;
unsigned long r7;
unsigned long orig_r2; /* Copy of r2 ?? */
unsigned long ra; /* Return address */
unsigned long fp; /* Frame pointer */
unsigned long sp; /* Stack pointer */
unsigned long gp; /* Global pointer */
unsigned long estatus;
unsigned long ea; /* Exception return address (pc) */
unsigned long orig_r7;
};
/*
* This is the extended stack used by signal handlers and the context
* switcher: it's pushed after the normal "struct pt_regs".
*/
struct switch_stack {
unsigned long r16; /* r16-r23 Callee-saved GP registers */
unsigned long r17;
unsigned long r18;
unsigned long r19;
unsigned long r20;
unsigned long r21;
unsigned long r22;
unsigned long r23;
unsigned long fp;
unsigned long gp;
unsigned long ra;
};
#define user_mode(regs) (((regs)->estatus & ESTATUS_EU))
#define instruction_pointer(regs) ((regs)->ra)
#define profile_pc(regs) instruction_pointer(regs)
#define user_stack_pointer(regs) ((regs)->sp)
extern void show_regs(struct pt_regs *);
#define current_pt_regs() \
((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE)\
- 1)
#define force_successful_syscall_return() (current_pt_regs()->orig_r2 = -1)
int do_syscall_trace_enter(void);
void do_syscall_trace_exit(void);
#endif /* __ASSEMBLY__ */
#endif /* _ASM_NIOS2_PTRACE_H */
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