1 /* SPDX-License-Identifier: GPL-2.0 */
2 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
4 #ifndef __ASM_CSKY_PTRACE_H
5 #define __ASM_CSKY_PTRACE_H
7 #include <uapi/asm/ptrace.h>
9 #include <linux/types.h>
10 #include <linux/compiler.h>
14 #define PS_S 0x80000000 /* Supervisor Mode */
16 #define USR_BKPT 0x1464
18 #define arch_has_single_step() (1)
19 #define current_pt_regs() \
20 ({ (struct pt_regs *)((char *)current_thread_info() + THREAD_SIZE) - 1; })
22 #define user_stack_pointer(regs) ((regs)->usp)
24 #define user_mode(regs) (!((regs)->sr & PS_S))
25 #define instruction_pointer(regs) ((regs)->pc)
26 #define profile_pc(regs) instruction_pointer(regs)
28 static inline void instruction_pointer_set(struct pt_regs *regs,
34 #if defined(__CSKYABIV2__)
35 #define MAX_REG_OFFSET offsetof(struct pt_regs, dcsr)
37 #define MAX_REG_OFFSET offsetof(struct pt_regs, regs[9])
40 static inline bool in_syscall(struct pt_regs const *regs)
42 return ((regs->sr >> 16) & 0xff) == VEC_TRAP0;
45 static inline void forget_syscall(struct pt_regs *regs)
47 regs->sr &= ~(0xff << 16);
50 static inline unsigned long regs_return_value(struct pt_regs *regs)
55 static inline void regs_set_return_value(struct pt_regs *regs,
61 /* Valid only for Kernel mode traps. */
62 static inline unsigned long kernel_stack_pointer(struct pt_regs *regs)
67 static inline unsigned long frame_pointer(struct pt_regs *regs)
71 static inline void frame_pointer_set(struct pt_regs *regs,
77 extern int regs_query_register_offset(const char *name);
78 extern unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
82 * regs_get_register() - get register value from its offset
83 * @regs: pt_regs from which register value is gotten
84 * @offset: offset of the register.
86 * regs_get_register returns the value of a register whose offset from @regs.
87 * The @offset is the offset of the register in struct pt_regs.
88 * If @offset is bigger than MAX_REG_OFFSET, this returns 0.
90 static inline unsigned long regs_get_register(struct pt_regs *regs,
93 if (unlikely(offset > MAX_REG_OFFSET))
96 return *(unsigned long *)((unsigned long)regs + offset);
99 #endif /* __ASSEMBLY__ */
100 #endif /* __ASM_CSKY_PTRACE_H */