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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 1999, 2000 Niibe Yutaka
4 */
5#ifndef __ASM_SH_PTRACE_H
6#define __ASM_SH_PTRACE_H
7
8
9#include <linux/stringify.h>
10#include <linux/stddef.h>
11#include <linux/thread_info.h>
12#include <asm/addrspace.h>
13#include <asm/page.h>
14#include <uapi/asm/ptrace.h>
15
16#define user_mode(regs) (((regs)->sr & 0x40000000)==0)
17#define kernel_stack_pointer(_regs) ((unsigned long)(_regs)->regs[15])
18
19#define GET_FP(regs) ((regs)->regs[14])
20#define GET_USP(regs) ((regs)->regs[15])
21
22#define arch_has_single_step() (1)
23
24/*
25 * kprobe-based event tracer support
26 */
27struct pt_regs_offset {
28 const char *name;
29 int offset;
30};
31
32#define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
33#define REGS_OFFSET_NAME(num) \
34 {.name = __stringify(r##num), .offset = offsetof(struct pt_regs, regs[num])}
35#define TREGS_OFFSET_NAME(num) \
36 {.name = __stringify(tr##num), .offset = offsetof(struct pt_regs, tregs[num])}
37#define REG_OFFSET_END {.name = NULL, .offset = 0}
38
39/* Query offset/name of register from its name/offset */
40extern int regs_query_register_offset(const char *name);
41extern const char *regs_query_register_name(unsigned int offset);
42
43extern const struct pt_regs_offset regoffset_table[];
44
45/**
46 * regs_get_register() - get register value from its offset
47 * @regs: pt_regs from which register value is gotten.
48 * @offset: offset number of the register.
49 *
50 * regs_get_register returns the value of a register. The @offset is the
51 * offset of the register in struct pt_regs address which specified by @regs.
52 * If @offset is bigger than MAX_REG_OFFSET, this returns 0.
53 */
54static inline unsigned long regs_get_register(struct pt_regs *regs,
55 unsigned int offset)
56{
57 if (unlikely(offset > MAX_REG_OFFSET))
58 return 0;
59 return *(unsigned long *)((unsigned long)regs + offset);
60}
61
62/**
63 * regs_within_kernel_stack() - check the address in the stack
64 * @regs: pt_regs which contains kernel stack pointer.
65 * @addr: address which is checked.
66 *
67 * regs_within_kernel_stack() checks @addr is within the kernel stack page(s).
68 * If @addr is within the kernel stack, it returns true. If not, returns false.
69 */
70static inline int regs_within_kernel_stack(struct pt_regs *regs,
71 unsigned long addr)
72{
73 return ((addr & ~(THREAD_SIZE - 1)) ==
74 (kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1)));
75}
76
77/**
78 * regs_get_kernel_stack_nth() - get Nth entry of the stack
79 * @regs: pt_regs which contains kernel stack pointer.
80 * @n: stack entry number.
81 *
82 * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which
83 * is specified by @regs. If the @n th entry is NOT in the kernel stack,
84 * this returns 0.
85 */
86static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
87 unsigned int n)
88{
89 unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs);
90 addr += n;
91 if (regs_within_kernel_stack(regs, (unsigned long)addr))
92 return *addr;
93 else
94 return 0;
95}
96
97struct perf_event;
98struct perf_sample_data;
99
100extern void ptrace_triggered(struct perf_event *bp,
101 struct perf_sample_data *data, struct pt_regs *regs);
102
103#define task_pt_regs(task) \
104 ((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1)
105
106static inline unsigned long profile_pc(struct pt_regs *regs)
107{
108 unsigned long pc = regs->pc;
109
110 if (virt_addr_uncached(pc))
111 return CAC_ADDR(pc);
112
113 return pc;
114}
115#define profile_pc profile_pc
116
117#include <asm-generic/ptrace.h>
118#endif /* __ASM_SH_PTRACE_H */
1#ifndef __ASM_SH_PTRACE_H
2#define __ASM_SH_PTRACE_H
3
4/*
5 * Copyright (C) 1999, 2000 Niibe Yutaka
6 */
7
8#define PTRACE_GETREGS 12 /* General registers */
9#define PTRACE_SETREGS 13
10
11#define PTRACE_GETFPREGS 14 /* FPU registers */
12#define PTRACE_SETFPREGS 15
13
14#define PTRACE_GETFDPIC 31 /* get the ELF fdpic loadmap address */
15
16#define PTRACE_GETFDPIC_EXEC 0 /* [addr] request the executable loadmap */
17#define PTRACE_GETFDPIC_INTERP 1 /* [addr] request the interpreter loadmap */
18
19#define PTRACE_GETDSPREGS 55 /* DSP registers */
20#define PTRACE_SETDSPREGS 56
21
22#define PT_TEXT_END_ADDR 240
23#define PT_TEXT_ADDR 244 /* &(struct user)->start_code */
24#define PT_DATA_ADDR 248 /* &(struct user)->start_data */
25#define PT_TEXT_LEN 252
26
27#if defined(__SH5__) || defined(CONFIG_CPU_SH5)
28#include "ptrace_64.h"
29#else
30#include "ptrace_32.h"
31#endif
32
33#ifdef __KERNEL__
34
35#include <linux/stringify.h>
36#include <linux/stddef.h>
37#include <linux/thread_info.h>
38#include <asm/addrspace.h>
39#include <asm/page.h>
40
41#define user_mode(regs) (((regs)->sr & 0x40000000)==0)
42#define kernel_stack_pointer(_regs) ((unsigned long)(_regs)->regs[15])
43
44#define GET_FP(regs) ((regs)->regs[14])
45#define GET_USP(regs) ((regs)->regs[15])
46
47#define arch_has_single_step() (1)
48
49/*
50 * kprobe-based event tracer support
51 */
52struct pt_regs_offset {
53 const char *name;
54 int offset;
55};
56
57#define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
58#define REGS_OFFSET_NAME(num) \
59 {.name = __stringify(r##num), .offset = offsetof(struct pt_regs, regs[num])}
60#define TREGS_OFFSET_NAME(num) \
61 {.name = __stringify(tr##num), .offset = offsetof(struct pt_regs, tregs[num])}
62#define REG_OFFSET_END {.name = NULL, .offset = 0}
63
64/* Query offset/name of register from its name/offset */
65extern int regs_query_register_offset(const char *name);
66extern const char *regs_query_register_name(unsigned int offset);
67
68extern const struct pt_regs_offset regoffset_table[];
69
70/**
71 * regs_get_register() - get register value from its offset
72 * @regs: pt_regs from which register value is gotten.
73 * @offset: offset number of the register.
74 *
75 * regs_get_register returns the value of a register. The @offset is the
76 * offset of the register in struct pt_regs address which specified by @regs.
77 * If @offset is bigger than MAX_REG_OFFSET, this returns 0.
78 */
79static inline unsigned long regs_get_register(struct pt_regs *regs,
80 unsigned int offset)
81{
82 if (unlikely(offset > MAX_REG_OFFSET))
83 return 0;
84 return *(unsigned long *)((unsigned long)regs + offset);
85}
86
87/**
88 * regs_within_kernel_stack() - check the address in the stack
89 * @regs: pt_regs which contains kernel stack pointer.
90 * @addr: address which is checked.
91 *
92 * regs_within_kernel_stack() checks @addr is within the kernel stack page(s).
93 * If @addr is within the kernel stack, it returns true. If not, returns false.
94 */
95static inline int regs_within_kernel_stack(struct pt_regs *regs,
96 unsigned long addr)
97{
98 return ((addr & ~(THREAD_SIZE - 1)) ==
99 (kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1)));
100}
101
102/**
103 * regs_get_kernel_stack_nth() - get Nth entry of the stack
104 * @regs: pt_regs which contains kernel stack pointer.
105 * @n: stack entry number.
106 *
107 * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which
108 * is specified by @regs. If the @n th entry is NOT in the kernel stack,
109 * this returns 0.
110 */
111static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
112 unsigned int n)
113{
114 unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs);
115 addr += n;
116 if (regs_within_kernel_stack(regs, (unsigned long)addr))
117 return *addr;
118 else
119 return 0;
120}
121
122struct perf_event;
123struct perf_sample_data;
124
125extern void ptrace_triggered(struct perf_event *bp,
126 struct perf_sample_data *data, struct pt_regs *regs);
127
128#define task_pt_regs(task) \
129 ((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1)
130
131static inline unsigned long profile_pc(struct pt_regs *regs)
132{
133 unsigned long pc = regs->pc;
134
135 if (virt_addr_uncached(pc))
136 return CAC_ADDR(pc);
137
138 return pc;
139}
140#define profile_pc profile_pc
141
142#include <asm-generic/ptrace.h>
143#endif /* __KERNEL__ */
144
145#endif /* __ASM_SH_PTRACE_H */