diff options
author | Palmer Dabbelt <palmer@dabbelt.com> | 2017-07-11 04:07:09 +0300 |
---|---|---|
committer | Palmer Dabbelt <palmer@dabbelt.com> | 2017-09-27 01:26:48 +0300 |
commit | e2c0cdfba7f69925afc92b20cd9835d81e11a4f1 (patch) | |
tree | 2c501638321da451423b385652183d60da02db5c /arch/riscv/include/asm/ptrace.h | |
parent | 07037db5d479f90377c998259a4f9a469c404edf (diff) | |
download | linux-e2c0cdfba7f69925afc92b20cd9835d81e11a4f1.tar.xz |
RISC-V: User-facing API
This patch contains code that is in some way visible to the user:
including via system calls, the VDSO, module loading and signal
handling. It also contains some generic code that is ABI visible.
Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
Diffstat (limited to 'arch/riscv/include/asm/ptrace.h')
-rw-r--r-- | arch/riscv/include/asm/ptrace.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/ptrace.h b/arch/riscv/include/asm/ptrace.h new file mode 100644 index 000000000000..93b8956e25e4 --- /dev/null +++ b/arch/riscv/include/asm/ptrace.h @@ -0,0 +1,118 @@ +/* + * Copyright (C) 2012 Regents of the University of California + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef _ASM_RISCV_PTRACE_H +#define _ASM_RISCV_PTRACE_H + +#include <uapi/asm/ptrace.h> +#include <asm/csr.h> + +#ifndef __ASSEMBLY__ + +struct pt_regs { + unsigned long sepc; + unsigned long ra; + unsigned long sp; + unsigned long gp; + unsigned long tp; + unsigned long t0; + unsigned long t1; + unsigned long t2; + unsigned long s0; + unsigned long s1; + unsigned long a0; + unsigned long a1; + unsigned long a2; + unsigned long a3; + unsigned long a4; + unsigned long a5; + unsigned long a6; + unsigned long a7; + unsigned long s2; + unsigned long s3; + unsigned long s4; + unsigned long s5; + unsigned long s6; + unsigned long s7; + unsigned long s8; + unsigned long s9; + unsigned long s10; + unsigned long s11; + unsigned long t3; + unsigned long t4; + unsigned long t5; + unsigned long t6; + /* Supervisor CSRs */ + unsigned long sstatus; + unsigned long sbadaddr; + unsigned long scause; + /* a0 value before the syscall */ + unsigned long orig_a0; +}; + +#ifdef CONFIG_64BIT +#define REG_FMT "%016lx" +#else +#define REG_FMT "%08lx" +#endif + +#define user_mode(regs) (((regs)->sstatus & SR_PS) == 0) + + +/* Helpers for working with the instruction pointer */ +#define GET_IP(regs) ((regs)->sepc) +#define SET_IP(regs, val) (GET_IP(regs) = (val)) + +static inline unsigned long instruction_pointer(struct pt_regs *regs) +{ + return GET_IP(regs); +} +static inline void instruction_pointer_set(struct pt_regs *regs, + unsigned long val) +{ + SET_IP(regs, val); +} + +#define profile_pc(regs) instruction_pointer(regs) + +/* Helpers for working with the user stack pointer */ +#define GET_USP(regs) ((regs)->sp) +#define SET_USP(regs, val) (GET_USP(regs) = (val)) + +static inline unsigned long user_stack_pointer(struct pt_regs *regs) +{ + return GET_USP(regs); +} +static inline void user_stack_pointer_set(struct pt_regs *regs, + unsigned long val) +{ + SET_USP(regs, val); +} + +/* Helpers for working with the frame pointer */ +#define GET_FP(regs) ((regs)->s0) +#define SET_FP(regs, val) (GET_FP(regs) = (val)) + +static inline unsigned long frame_pointer(struct pt_regs *regs) +{ + return GET_FP(regs); +} +static inline void frame_pointer_set(struct pt_regs *regs, + unsigned long val) +{ + SET_FP(regs, val); +} + +#endif /* __ASSEMBLY__ */ + +#endif /* _ASM_RISCV_PTRACE_H */ |