projects / thirdparty / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| f335b10f GR |
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> | |
| f4625ee0 GR |
8 | #include <asm/traps.h> |
| 9 | #include <linux/types.h> | |
| bfe47f35 | 10 | #include <linux/compiler.h> |
| f335b10f GR |
11 | |
| 12 | #ifndef __ASSEMBLY__ | |
| 13 | ||
| 14 | #define PS_S 0x80000000 /* Supervisor Mode */ | |
| 15 | ||
| 33e53ae1 GR |
16 | #define USR_BKPT 0x1464 |
| 17 | ||
| f335b10f GR |
18 | #define arch_has_single_step() (1) |
| 19 | #define current_pt_regs() \ | |
| 20 | ({ (struct pt_regs *)((char *)current_thread_info() + THREAD_SIZE) - 1; }) | |
| 21 | ||
| 22 | #define user_stack_pointer(regs) ((regs)->usp) | |
| 23 | ||
| 24 | #define user_mode(regs) (!((regs)->sr & PS_S)) | |
| 25 | #define instruction_pointer(regs) ((regs)->pc) | |
| 26 | #define profile_pc(regs) instruction_pointer(regs) | |
| 27 | ||
| bfe47f35 GR |
28 | static inline void instruction_pointer_set(struct pt_regs *regs, |
| 29 | unsigned long val) | |
| 30 | { | |
| 31 | regs->pc = val; | |
| 32 | } | |
| 33 | ||
| 34 | #if defined(__CSKYABIV2__) | |
| 35 | #define MAX_REG_OFFSET offsetof(struct pt_regs, dcsr) | |
| 36 | #else | |
| 37 | #define MAX_REG_OFFSET offsetof(struct pt_regs, regs[9]) | |
| 38 | #endif | |
| 39 | ||
| f4625ee0 GR |
40 | static inline bool in_syscall(struct pt_regs const *regs) |
| 41 | { | |
| 42 | return ((regs->sr >> 16) & 0xff) == VEC_TRAP0; | |
| 43 | } | |
| 44 | ||
| 45 | static inline void forget_syscall(struct pt_regs *regs) | |
| 46 | { | |
| 47 | regs->sr &= ~(0xff << 16); | |
| 48 | } | |
| 49 | ||
| f335b10f GR |
50 | static inline unsigned long regs_return_value(struct pt_regs *regs) |
| 51 | { | |
| 52 | return regs->a0; | |
| 53 | } | |
| 54 | ||
| bfe47f35 GR |
55 | /* Valid only for Kernel mode traps. */ |
| 56 | static inline unsigned long kernel_stack_pointer(struct pt_regs *regs) | |
| 57 | { | |
| 58 | return regs->usp; | |
| 59 | } | |
| 60 | ||
| 18c07d23 GR |
61 | static inline unsigned long frame_pointer(struct pt_regs *regs) |
| 62 | { | |
| 63 | return regs->regs[4]; | |
| 64 | } | |
| 65 | static inline void frame_pointer_set(struct pt_regs *regs, | |
| 66 | unsigned long val) | |
| 67 | { | |
| 68 | regs->regs[4] = val; | |
| 69 | } | |
| 70 | ||
| bfe47f35 GR |
71 | extern int regs_query_register_offset(const char *name); |
| 72 | extern unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, | |
| 73 | unsigned int n); | |
| 74 | ||
| 75 | /* | |
| 76 | * regs_get_register() - get register value from its offset | |
| 77 | * @regs: pt_regs from which register value is gotten | |
| 78 | * @offset: offset of the register. | |
| 79 | * | |
| 80 | * regs_get_register returns the value of a register whose offset from @regs. | |
| 81 | * The @offset is the offset of the register in struct pt_regs. | |
| 82 | * If @offset is bigger than MAX_REG_OFFSET, this returns 0. | |
| 83 | */ | |
| 84 | static inline unsigned long regs_get_register(struct pt_regs *regs, | |
| 85 | unsigned int offset) | |
| 86 | { | |
| 87 | if (unlikely(offset > MAX_REG_OFFSET)) | |
| 88 | return 0; | |
| 89 | ||
| 90 | return *(unsigned long *)((unsigned long)regs + offset); | |
| 91 | } | |
| 92 | ||
| f335b10f GR |
93 | #endif /* __ASSEMBLY__ */ |
| 94 | #endif /* __ASM_CSKY_PTRACE_H */ |