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146 lines
3.3 KiB
146 lines
3.3 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) 2012 Regents of the University of California |
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*/ |
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#ifndef _ASM_RISCV_PTRACE_H |
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#define _ASM_RISCV_PTRACE_H |
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#include <uapi/asm/ptrace.h> |
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#include <asm/csr.h> |
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#include <linux/compiler.h> |
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#ifndef __ASSEMBLY__ |
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struct pt_regs { |
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unsigned long epc; |
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unsigned long ra; |
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unsigned long sp; |
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unsigned long gp; |
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unsigned long tp; |
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unsigned long t0; |
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unsigned long t1; |
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unsigned long t2; |
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unsigned long s0; |
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unsigned long s1; |
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unsigned long a0; |
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unsigned long a1; |
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unsigned long a2; |
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unsigned long a3; |
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unsigned long a4; |
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unsigned long a5; |
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unsigned long a6; |
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unsigned long a7; |
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unsigned long s2; |
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unsigned long s3; |
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unsigned long s4; |
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unsigned long s5; |
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unsigned long s6; |
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unsigned long s7; |
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unsigned long s8; |
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unsigned long s9; |
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unsigned long s10; |
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unsigned long s11; |
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unsigned long t3; |
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unsigned long t4; |
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unsigned long t5; |
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unsigned long t6; |
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/* Supervisor/Machine CSRs */ |
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unsigned long status; |
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unsigned long badaddr; |
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unsigned long cause; |
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/* a0 value before the syscall */ |
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unsigned long orig_a0; |
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}; |
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#ifdef CONFIG_64BIT |
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#define REG_FMT "%016lx" |
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#else |
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#define REG_FMT "%08lx" |
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#endif |
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#define user_mode(regs) (((regs)->status & SR_PP) == 0) |
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#define MAX_REG_OFFSET offsetof(struct pt_regs, orig_a0) |
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/* Helpers for working with the instruction pointer */ |
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static inline unsigned long instruction_pointer(struct pt_regs *regs) |
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{ |
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return regs->epc; |
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} |
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static inline void instruction_pointer_set(struct pt_regs *regs, |
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unsigned long val) |
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{ |
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regs->epc = val; |
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} |
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#define profile_pc(regs) instruction_pointer(regs) |
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/* Helpers for working with the user stack pointer */ |
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static inline unsigned long user_stack_pointer(struct pt_regs *regs) |
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{ |
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return regs->sp; |
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} |
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static inline void user_stack_pointer_set(struct pt_regs *regs, |
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unsigned long val) |
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{ |
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regs->sp = val; |
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} |
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/* Valid only for Kernel mode traps. */ |
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static inline unsigned long kernel_stack_pointer(struct pt_regs *regs) |
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{ |
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return regs->sp; |
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} |
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/* Helpers for working with the frame pointer */ |
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static inline unsigned long frame_pointer(struct pt_regs *regs) |
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{ |
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return regs->s0; |
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} |
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static inline void frame_pointer_set(struct pt_regs *regs, |
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unsigned long val) |
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{ |
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regs->s0 = val; |
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} |
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static inline unsigned long regs_return_value(struct pt_regs *regs) |
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{ |
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return regs->a0; |
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} |
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static inline void regs_set_return_value(struct pt_regs *regs, |
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unsigned long val) |
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{ |
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regs->a0 = val; |
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} |
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extern int regs_query_register_offset(const char *name); |
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extern unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, |
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unsigned int n); |
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void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr, |
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unsigned long frame_pointer); |
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int do_syscall_trace_enter(struct pt_regs *regs); |
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void do_syscall_trace_exit(struct pt_regs *regs); |
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/** |
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* regs_get_register() - get register value from its offset |
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* @regs: pt_regs from which register value is gotten |
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* @offset: offset of the register. |
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* |
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* regs_get_register returns the value of a register whose offset from @regs. |
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* The @offset is the offset of the register in struct pt_regs. |
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* If @offset is bigger than MAX_REG_OFFSET, this returns 0. |
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*/ |
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static inline unsigned long regs_get_register(struct pt_regs *regs, |
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unsigned int offset) |
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{ |
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if (unlikely(offset > MAX_REG_OFFSET)) |
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return 0; |
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return *(unsigned long *)((unsigned long)regs + offset); |
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} |
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#endif /* __ASSEMBLY__ */ |
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#endif /* _ASM_RISCV_PTRACE_H */
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