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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/nios2/include/asm/ptrace.h
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/*

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 * Copyright (C) 2013 Altera Corporation

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 * Copyright (C) 2010 Tobias Klauser <[email protected]>

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 * Copyright (C) 2004 Microtronix Datacom Ltd

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 *

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 * based on m68k asm/processor.h

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 *

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 * This file is subject to the terms and conditions of the GNU General Public

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 * License.  See the file "COPYING" in the main directory of this archive

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 * for more details.

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 */

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#ifndef _ASM_NIOS2_PTRACE_H

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#define _ASM_NIOS2_PTRACE_H

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#include <uapi/asm/ptrace.h>

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/* This struct defines the way the registers are stored on the

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   stack during a system call.  */

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#ifndef __ASSEMBLY__

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struct pt_regs {

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	unsigned long  r8;	/* r8-r15 Caller-saved GP registers */

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	unsigned long  r9;

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	unsigned long  r10;

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	unsigned long  r11;

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	unsigned long  r12;

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	unsigned long  r13;

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	unsigned long  r14;

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	unsigned long  r15;

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	unsigned long  r1;	/* Assembler temporary */

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	unsigned long  r2;	/* Retval LS 32bits */

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	unsigned long  r3;	/* Retval MS 32bits */

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	unsigned long  r4;	/* r4-r7 Register arguments */

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	unsigned long  r5;

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	unsigned long  r6;

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	unsigned long  r7;

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	unsigned long  orig_r2;	/* Copy of r2 ?? */

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	unsigned long  ra;	/* Return address */

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	unsigned long  fp;	/* Frame pointer */

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	unsigned long  sp;	/* Stack pointer */

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	unsigned long  gp;	/* Global pointer */

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	unsigned long  estatus;

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	unsigned long  ea;	/* Exception return address (pc) */

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	unsigned long  orig_r7;

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};

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/*

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 * This is the extended stack used by signal handlers and the context

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 * switcher: it's pushed after the normal "struct pt_regs".

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 */

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struct switch_stack {

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	unsigned long  r16;	/* r16-r23 Callee-saved GP registers */

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	unsigned long  r17;

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	unsigned long  r18;

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	unsigned long  r19;

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	unsigned long  r20;

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	unsigned long  r21;

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	unsigned long  r22;

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	unsigned long  r23;

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	unsigned long  fp;

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	unsigned long  gp;

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	unsigned long  ra;

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};

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#define user_mode(regs)	(((regs)->estatus & ESTATUS_EU))

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#define instruction_pointer(regs)	((regs)->ra)

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#define profile_pc(regs)		instruction_pointer(regs)

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#define user_stack_pointer(regs)	((regs)->sp)

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extern void show_regs(struct pt_regs *);

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#define current_pt_regs() \

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	((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE)\

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		- 1)

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#define force_successful_syscall_return() (current_pt_regs()->orig_r2 = -1)

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int do_syscall_trace_enter(void);

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void do_syscall_trace_exit(void);

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#endif /* __ASSEMBLY__ */

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#endif /* _ASM_NIOS2_PTRACE_H */

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