xref: /openbmc/linux/arch/csky/include/asm/ptrace.h (revision 9726bfcd)
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 */
42