diff options
Diffstat (limited to 'include/asm-v850/ptrace.h')
| -rw-r--r-- | include/asm-v850/ptrace.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/include/asm-v850/ptrace.h b/include/asm-v850/ptrace.h new file mode 100644 index 00000000000..7bf72bb5078 --- /dev/null +++ b/include/asm-v850/ptrace.h @@ -0,0 +1,121 @@ +/* + * include/asm-v850/ptrace.h -- Access to CPU registers + * + * Copyright (C) 2001,02,03 NEC Electronics Corporation + * Copyright (C) 2001,02,03 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> + */ + +#ifndef __V850_PTRACE_H__ +#define __V850_PTRACE_H__ + + +/* v850 general purpose registers with special meanings. */ +#define GPR_ZERO 0 /* constant zero */ +#define GPR_ASM 1 /* reserved for assembler */ +#define GPR_SP 3 /* stack pointer */ +#define GPR_GP 4 /* global data pointer */ +#define GPR_TP 5 /* `text pointer' */ +#define GPR_EP 30 /* `element pointer' */ +#define GPR_LP 31 /* link pointer (current return address) */ + +/* These aren't official names, but they make some code more descriptive. */ +#define GPR_ARG0 6 +#define GPR_ARG1 7 +#define GPR_ARG2 8 +#define GPR_ARG3 9 +#define GPR_RVAL0 10 +#define GPR_RVAL1 11 +#define GPR_RVAL GPR_RVAL0 + +#define NUM_GPRS 32 + +/* v850 `system' registers. */ +#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 v850_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. */ + v850_reg_t gpr[NUM_GPRS]; + + v850_reg_t pc; /* program counter */ + v850_reg_t psw; /* program status word */ + + /* Registers used by `callt' instruction: */ + v850_reg_t ctpc; /* saved program counter */ + v850_reg_t ctpsw; /* saved psw */ + v850_reg_t ctbp; /* base pointer for callt table */ + + char kernel_mode; /* 1 if in `kernel mode', 0 if user mode */ +}; + + +#define instruction_pointer(regs) ((regs)->pc) +#define profile_pc(regs) instruction_pointer(regs) +#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 PT_PC ((NUM_GPRS + 0) * _PT_REG_SIZE) +#define PT_PSW ((NUM_GPRS + 1) * _PT_REG_SIZE) +#define PT_CTPC ((NUM_GPRS + 2) * _PT_REG_SIZE) +#define PT_CTPSW ((NUM_GPRS + 3) * _PT_REG_SIZE) +#define PT_CTBP ((NUM_GPRS + 4) * _PT_REG_SIZE) +#define PT_KERNEL_MODE ((NUM_GPRS + 5) * _PT_REG_SIZE) + +/* Where the current syscall number is stashed; obviously only valid in + the kernel! */ +#define PT_CUR_SYSCALL PT_GPR(0) + +/* Size of struct pt_regs, including alignment. */ +#define PT_SIZE ((NUM_GPRS + 6) * _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) + + +#endif /* __V850_PTRACE_H__ */ |