117 lines
3.4 KiB
C
117 lines
3.4 KiB
C
/*
|
|
* include/asm-microblaze/ptrace.h -- Access to CPU registers
|
|
*
|
|
* Copyright (C) 2003 John Williams <jwilliams@itee.uq.edu.au>
|
|
* Copyright (C) 2001,2002 NEC Corporation
|
|
* Copyright (C) 2001,2002 Miles Bader <miles@gnu.org>
|
|
*
|
|
* 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.
|
|
*
|
|
* Written by Miles Bader <miles@gnu.org>
|
|
* Microblaze port by John Williams
|
|
*/
|
|
|
|
#ifndef __MICROBLAZE_PTRACE_H__
|
|
#define __MICROBLAZE_PTRACE_H__
|
|
|
|
|
|
/* Microblaze general purpose registers with special meanings. */
|
|
#define GPR_ZERO 0 /* constant zero */
|
|
#define GPR_ASM 18 /* reserved for assembler */
|
|
#define GPR_SP 1 /* stack pointer */
|
|
#define GPR_GP 2 /* global data pointer */
|
|
#define GPR_EP 30 /* `element pointer' */
|
|
#define GPR_LP 15 /* link pointer (current return address) */
|
|
|
|
/* These aren't official names, but they make some code more descriptive. */
|
|
#define GPR_ARG0 5
|
|
#define GPR_ARG1 6
|
|
#define GPR_ARG2 7
|
|
#define GPR_ARG3 8
|
|
#define GPR_ARG4 9
|
|
#define GPR_ARG5 10
|
|
#define GPR_RVAL0 3
|
|
#define GPR_RVAL1 4
|
|
#define GPR_RVAL GPR_RVAL0
|
|
|
|
#define NUM_GPRS 32
|
|
|
|
/* `system' registers. */
|
|
/* Note these are old v850 values, microblaze has many fewer */
|
|
#define SR_EIPC 0
|
|
#define SR_EIPSW 1
|
|
#define SR_FEPC 2
|
|
#define SR_FEPSW 3
|
|
#define SR_ECR 4
|
|
#define SR_PSW 5
|
|
#define SR_CTPC 16
|
|
#define SR_CTPSW 17
|
|
#define SR_DBPC 18
|
|
#define SR_DBPSW 19
|
|
#define SR_CTBP 20
|
|
#define SR_DIR 21
|
|
#define SR_ASID 23
|
|
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
typedef unsigned long microblaze_reg_t;
|
|
|
|
/* How processor state is stored on the stack during a syscall/signal.
|
|
If you change this structure, change the associated assembly-language
|
|
macros below too (PT_*)! */
|
|
struct pt_regs
|
|
{
|
|
/* General purpose registers. */
|
|
microblaze_reg_t gpr[NUM_GPRS];
|
|
|
|
microblaze_reg_t pc; /* program counter */
|
|
microblaze_reg_t psw; /* program status word */
|
|
|
|
microblaze_reg_t kernel_mode; /* 1 if in `kernel mode', 0 if user mode */
|
|
microblaze_reg_t single_step; /* 1 if in single step mode */
|
|
};
|
|
|
|
|
|
#define instruction_pointer(regs) ((regs)->pc)
|
|
#define user_mode(regs) (!(regs)->kernel_mode)
|
|
|
|
/* When a struct pt_regs is used to save user state for a system call in
|
|
the kernel, the system call is stored in the space for R0 (since it's
|
|
never used otherwise, R0 being a constant 0). Non-system-calls
|
|
simply store 0 there. */
|
|
#define PT_REGS_SYSCALL(regs) (regs)->gpr[0]
|
|
#define PT_REGS_SET_SYSCALL(regs, val) ((regs)->gpr[0] = (val))
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
|
|
/* The number of bytes used to store each register. */
|
|
#define _PT_REG_SIZE 4
|
|
|
|
/* Offset of a general purpose register in a stuct pt_regs. */
|
|
#define PT_GPR(num) ((num) * _PT_REG_SIZE)
|
|
|
|
/* Offsets of various special registers & fields in a struct pt_regs. */
|
|
#define NUM_SPECIAL 4
|
|
#define PT_PC ((NUM_GPRS + 0) * _PT_REG_SIZE)
|
|
#define PT_PSW ((NUM_GPRS + 1) * _PT_REG_SIZE)
|
|
#define PT_KERNEL_MODE ((NUM_GPRS + 2) * _PT_REG_SIZE)
|
|
#define PT_SINGLESTEP ((NUM_GPRS + 3) * _PT_REG_SIZE)
|
|
|
|
#define PT_SYSCALL PT_GPR(0)
|
|
|
|
/* Size of struct pt_regs, including alignment. */
|
|
#define PT_SIZE ((NUM_GPRS + NUM_SPECIAL) * _PT_REG_SIZE)
|
|
|
|
/* These are `magic' values for PTRACE_PEEKUSR that return info about where
|
|
a process is located in memory. */
|
|
#define PT_TEXT_ADDR (PT_SIZE + 1)
|
|
#define PT_TEXT_LEN (PT_SIZE + 2)
|
|
#define PT_DATA_ADDR (PT_SIZE + 3)
|
|
#define PT_DATA_LEN (PT_SIZE + 4)
|
|
|
|
#endif /* __MICROBLAZE_PTRACE_H__ */
|