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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | /* |
3 | * Copyright (C) 1999, 2000 Niibe Yutaka | |
1da177e4 | 4 | */ |
0a9426df DH |
5 | #ifndef __ASM_SH_PTRACE_H |
6 | #define __ASM_SH_PTRACE_H | |
1da177e4 | 7 | |
da28c597 PM |
8 | |
9 | #include <linux/stringify.h> | |
10 | #include <linux/stddef.h> | |
11 | #include <linux/thread_info.h> | |
33f242ed | 12 | #include <asm/addrspace.h> |
b0f3ae03 | 13 | #include <asm/page.h> |
0a9426df | 14 | #include <uapi/asm/ptrace.h> |
33f242ed PM |
15 | |
16 | #define user_mode(regs) (((regs)->sr & 0x40000000)==0) | |
eac676e5 | 17 | #define kernel_stack_pointer(_regs) ((unsigned long)(_regs)->regs[15]) |
db7eba29 | 18 | |
045bd00f CH |
19 | static inline unsigned long instruction_pointer(struct pt_regs *regs) |
20 | { | |
21 | return regs->pc; | |
22 | } | |
23 | static inline void instruction_pointer_set(struct pt_regs *regs, | |
24 | unsigned long val) | |
25 | { | |
26 | regs->pc = val; | |
27 | } | |
28 | ||
29 | static inline unsigned long frame_pointer(struct pt_regs *regs) | |
30 | { | |
31 | return regs->regs[14]; | |
32 | } | |
33 | ||
34 | static inline unsigned long user_stack_pointer(struct pt_regs *regs) | |
35 | { | |
36 | return regs->regs[15]; | |
37 | } | |
38 | ||
39 | static inline void user_stack_pointer_set(struct pt_regs *regs, | |
40 | unsigned long val) | |
41 | { | |
42 | regs->regs[15] = val; | |
43 | } | |
33f242ed | 44 | |
eaaaeef3 PM |
45 | #define arch_has_single_step() (1) |
46 | ||
c459dbf2 | 47 | /* |
eaaaeef3 | 48 | * kprobe-based event tracer support |
c459dbf2 | 49 | */ |
eaaaeef3 PM |
50 | struct pt_regs_offset { |
51 | const char *name; | |
52 | int offset; | |
53 | }; | |
54 | ||
55 | #define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)} | |
56 | #define REGS_OFFSET_NAME(num) \ | |
57 | {.name = __stringify(r##num), .offset = offsetof(struct pt_regs, regs[num])} | |
da28c597 PM |
58 | #define TREGS_OFFSET_NAME(num) \ |
59 | {.name = __stringify(tr##num), .offset = offsetof(struct pt_regs, tregs[num])} | |
eaaaeef3 PM |
60 | #define REG_OFFSET_END {.name = NULL, .offset = 0} |
61 | ||
62 | /* Query offset/name of register from its name/offset */ | |
63 | extern int regs_query_register_offset(const char *name); | |
64 | extern const char *regs_query_register_name(unsigned int offset); | |
65 | ||
66 | extern const struct pt_regs_offset regoffset_table[]; | |
67 | ||
68 | /** | |
69 | * regs_get_register() - get register value from its offset | |
70 | * @regs: pt_regs from which register value is gotten. | |
71 | * @offset: offset number of the register. | |
72 | * | |
73 | * regs_get_register returns the value of a register. The @offset is the | |
74 | * offset of the register in struct pt_regs address which specified by @regs. | |
75 | * If @offset is bigger than MAX_REG_OFFSET, this returns 0. | |
76 | */ | |
77 | static inline unsigned long regs_get_register(struct pt_regs *regs, | |
78 | unsigned int offset) | |
79 | { | |
80 | if (unlikely(offset > MAX_REG_OFFSET)) | |
81 | return 0; | |
82 | return *(unsigned long *)((unsigned long)regs + offset); | |
83 | } | |
84 | ||
85 | /** | |
86 | * regs_within_kernel_stack() - check the address in the stack | |
87 | * @regs: pt_regs which contains kernel stack pointer. | |
88 | * @addr: address which is checked. | |
89 | * | |
90 | * regs_within_kernel_stack() checks @addr is within the kernel stack page(s). | |
91 | * If @addr is within the kernel stack, it returns true. If not, returns false. | |
92 | */ | |
93 | static inline int regs_within_kernel_stack(struct pt_regs *regs, | |
94 | unsigned long addr) | |
95 | { | |
96 | return ((addr & ~(THREAD_SIZE - 1)) == | |
97 | (kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1))); | |
98 | } | |
99 | ||
100 | /** | |
101 | * regs_get_kernel_stack_nth() - get Nth entry of the stack | |
102 | * @regs: pt_regs which contains kernel stack pointer. | |
103 | * @n: stack entry number. | |
104 | * | |
105 | * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which | |
106 | * is specified by @regs. If the @n th entry is NOT in the kernel stack, | |
107 | * this returns 0. | |
108 | */ | |
109 | static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, | |
110 | unsigned int n) | |
111 | { | |
112 | unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs); | |
113 | addr += n; | |
114 | if (regs_within_kernel_stack(regs, (unsigned long)addr)) | |
115 | return *addr; | |
116 | else | |
117 | return 0; | |
118 | } | |
c459dbf2 | 119 | |
34d0b5af PM |
120 | struct perf_event; |
121 | struct perf_sample_data; | |
122 | ||
c84b51e6 | 123 | extern void ptrace_triggered(struct perf_event *bp, |
34d0b5af PM |
124 | struct perf_sample_data *data, struct pt_regs *regs); |
125 | ||
3cf0f4ec | 126 | #define task_pt_regs(task) \ |
4f099ebb | 127 | ((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1) |
3cf0f4ec | 128 | |
1da177e4 LT |
129 | static inline unsigned long profile_pc(struct pt_regs *regs) |
130 | { | |
db7eba29 | 131 | unsigned long pc = regs->pc; |
1da177e4 | 132 | |
9edef286 PM |
133 | if (virt_addr_uncached(pc)) |
134 | return CAC_ADDR(pc); | |
33f242ed | 135 | |
1da177e4 LT |
136 | return pc; |
137 | } | |
3cea45c6 | 138 | |
1da177e4 | 139 | #endif /* __ASM_SH_PTRACE_H */ |