root/arch/csky/include/asm/ptrace.h

INCLUDED FROM

DEFINITIONS

1. in_syscall
2. forget_syscall
3. regs_return_value

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
   3 
   4 #ifndef __ASM_CSKY_PTRACE_H
   5 #define __ASM_CSKY_PTRACE_H
   6 
   7 #include <uapi/asm/ptrace.h>
   8 #include <asm/traps.h>
   9 #include <linux/types.h>
  10 
  11 #ifndef __ASSEMBLY__
  12 
  13 #define PS_S    0x80000000 /* Supervisor Mode */
  14 
  15 #define arch_has_single_step() (1)
  16 #define current_pt_regs() \
  17 ({ (struct pt_regs *)((char *)current_thread_info() + THREAD_SIZE) - 1; })
  18 
  19 #define user_stack_pointer(regs) ((regs)->usp)
  20 
  21 #define user_mode(regs) (!((regs)->sr & PS_S))
  22 #define instruction_pointer(regs) ((regs)->pc)
  23 #define profile_pc(regs) instruction_pointer(regs)
  24 
  25 static inline bool in_syscall(struct pt_regs const *regs)
  26 {
  27         return ((regs->sr >> 16) & 0xff) == VEC_TRAP0;
  28 }
  29 
  30 static inline void forget_syscall(struct pt_regs *regs)
  31 {
  32         regs->sr &= ~(0xff << 16);
  33 }
  34 
  35 static inline unsigned long regs_return_value(struct pt_regs *regs)
  36 {
  37         return regs->a0;
  38 }
  39 
  40 #endif /* __ASSEMBLY__ */
  41 #endif /* __ASM_CSKY_PTRACE_H */