1/* 2 * include/asm-v850/ptrace.h -- Access to CPU registers 3 * 4 * Copyright (C) 2001,02,03 NEC Electronics Corporation 5 * Copyright (C) 2001,02,03 Miles Bader <miles@gnu.org> 6 * 7 * This file is subject to the terms and conditions of the GNU General 8 * Public License. See the file COPYING in the main directory of this 9 * archive for more details. 10 * 11 * Written by Miles Bader <miles@gnu.org> 12 */ 13 14#ifndef __V850_PTRACE_H__ 15#define __V850_PTRACE_H__ 16 17 18/* v850 general purpose registers with special meanings. */ 19#define GPR_ZERO 0 /* constant zero */ 20#define GPR_ASM 1 /* reserved for assembler */ 21#define GPR_SP 3 /* stack pointer */ 22#define GPR_GP 4 /* global data pointer */ 23#define GPR_TP 5 /* `text pointer' */ 24#define GPR_EP 30 /* `element pointer' */ 25#define GPR_LP 31 /* link pointer (current return address) */ 26 27/* These aren't official names, but they make some code more descriptive. */ 28#define GPR_ARG0 6 29#define GPR_ARG1 7 30#define GPR_ARG2 8 31#define GPR_ARG3 9 32#define GPR_RVAL0 10 33#define GPR_RVAL1 11 34#define GPR_RVAL GPR_RVAL0 35 36#define NUM_GPRS 32 37 38/* v850 `system' registers. */ 39#define SR_EIPC 0 40#define SR_EIPSW 1 41#define SR_FEPC 2 42#define SR_FEPSW 3 43#define SR_ECR 4 44#define SR_PSW 5 45#define SR_CTPC 16 46#define SR_CTPSW 17 47#define SR_DBPC 18 48#define SR_DBPSW 19 49#define SR_CTBP 20 50#define SR_DIR 21 51#define SR_ASID 23 52 53 54#ifndef __ASSEMBLY__ 55 56typedef unsigned long v850_reg_t; 57 58/* How processor state is stored on the stack during a syscall/signal. 59 If you change this structure, change the associated assembly-language 60 macros below too (PT_*)! */ 61struct pt_regs 62{ 63 /* General purpose registers. */ 64 v850_reg_t gpr[NUM_GPRS]; 65 66 v850_reg_t pc; /* program counter */ 67 v850_reg_t psw; /* program status word */ 68 69 /* Registers used by `callt' instruction: */ 70 v850_reg_t ctpc; /* saved program counter */ 71 v850_reg_t ctpsw; /* saved psw */ 72 v850_reg_t ctbp; /* base pointer for callt table */ 73 74 char kernel_mode; /* 1 if in `kernel mode', 0 if user mode */ 75}; 76 77 78#define instruction_pointer(regs) ((regs)->pc) 79#define profile_pc(regs) instruction_pointer(regs) 80#define user_mode(regs) (!(regs)->kernel_mode) 81 82/* When a struct pt_regs is used to save user state for a system call in 83 the kernel, the system call is stored in the space for R0 (since it's 84 never used otherwise, R0 being a constant 0). Non-system-calls 85 simply store 0 there. */ 86#define PT_REGS_SYSCALL(regs) (regs)->gpr[0] 87#define PT_REGS_SET_SYSCALL(regs, val) ((regs)->gpr[0] = (val)) 88 89#endif /* !__ASSEMBLY__ */ 90 91 92/* The number of bytes used to store each register. */ 93#define _PT_REG_SIZE 4 94 95/* Offset of a general purpose register in a stuct pt_regs. */ 96#define PT_GPR(num) ((num) * _PT_REG_SIZE) 97 98/* Offsets of various special registers & fields in a struct pt_regs. */ 99#define PT_PC ((NUM_GPRS + 0) * _PT_REG_SIZE) 100#define PT_PSW ((NUM_GPRS + 1) * _PT_REG_SIZE) 101#define PT_CTPC ((NUM_GPRS + 2) * _PT_REG_SIZE) 102#define PT_CTPSW ((NUM_GPRS + 3) * _PT_REG_SIZE) 103#define PT_CTBP ((NUM_GPRS + 4) * _PT_REG_SIZE) 104#define PT_KERNEL_MODE ((NUM_GPRS + 5) * _PT_REG_SIZE) 105 106/* Where the current syscall number is stashed; obviously only valid in 107 the kernel! */ 108#define PT_CUR_SYSCALL PT_GPR(0) 109 110/* Size of struct pt_regs, including alignment. */ 111#define PT_SIZE ((NUM_GPRS + 6) * _PT_REG_SIZE) 112 113 114/* These are `magic' values for PTRACE_PEEKUSR that return info about where 115 a process is located in memory. */ 116#define PT_TEXT_ADDR (PT_SIZE + 1) 117#define PT_TEXT_LEN (PT_SIZE + 2) 118#define PT_DATA_ADDR (PT_SIZE + 3) 119 120 121#endif /* __V850_PTRACE_H__ */ 122