tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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#include <asm/system.h>
41
42#define user_mode(regs) (((regs)->sr & 0x40000000)==0)
43#define user_stack_pointer(_regs) ((unsigned long)(_regs)->regs[15])
44#define kernel_stack_pointer(_regs) ((unsigned long)(_regs)->regs[15])
45#define instruction_pointer(regs) ((unsigned long)(regs)->pc)
46
47extern void show_regs(struct pt_regs *);
48
49#define arch_has_single_step() (1)
50
51/*
52 * kprobe-based event tracer support
53 */
54struct pt_regs_offset {
55 const char *name;
56 int offset;
57};
58
59#define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
60#define REGS_OFFSET_NAME(num) \
61 {.name = __stringify(r##num), .offset = offsetof(struct pt_regs, regs[num])}
62#define TREGS_OFFSET_NAME(num) \
63 {.name = __stringify(tr##num), .offset = offsetof(struct pt_regs, tregs[num])}
64#define REG_OFFSET_END {.name = NULL, .offset = 0}
65
66/* Query offset/name of register from its name/offset */
67extern int regs_query_register_offset(const char *name);
68extern const char *regs_query_register_name(unsigned int offset);
69
70extern const struct pt_regs_offset regoffset_table[];
71
72/**
73 * regs_get_register() - get register value from its offset
74 * @regs: pt_regs from which register value is gotten.
75 * @offset: offset number of the register.
76 *
77 * regs_get_register returns the value of a register. The @offset is the
78 * offset of the register in struct pt_regs address which specified by @regs.
79 * If @offset is bigger than MAX_REG_OFFSET, this returns 0.
80 */
81static inline unsigned long regs_get_register(struct pt_regs *regs,
82 unsigned int offset)
83{
84 if (unlikely(offset > MAX_REG_OFFSET))
85 return 0;
86 return *(unsigned long *)((unsigned long)regs + offset);
87}
88
89/**
90 * regs_within_kernel_stack() - check the address in the stack
91 * @regs: pt_regs which contains kernel stack pointer.
92 * @addr: address which is checked.
93 *
94 * regs_within_kernel_stack() checks @addr is within the kernel stack page(s).
95 * If @addr is within the kernel stack, it returns true. If not, returns false.
96 */
97static inline int regs_within_kernel_stack(struct pt_regs *regs,
98 unsigned long addr)
99{
100 return ((addr & ~(THREAD_SIZE - 1)) ==
101 (kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1)));
102}
103
104/**
105 * regs_get_kernel_stack_nth() - get Nth entry of the stack
106 * @regs: pt_regs which contains kernel stack pointer.
107 * @n: stack entry number.
108 *
109 * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which
110 * is specified by @regs. If the @n th entry is NOT in the kernel stack,
111 * this returns 0.
112 */
113static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs,
114 unsigned int n)
115{
116 unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs);
117 addr += n;
118 if (regs_within_kernel_stack(regs, (unsigned long)addr))
119 return *addr;
120 else
121 return 0;
122}
123
124struct perf_event;
125struct perf_sample_data;
126
127extern void ptrace_triggered(struct perf_event *bp, int nmi,
128 struct perf_sample_data *data, struct pt_regs *regs);
129
130#define task_pt_regs(task) \
131 ((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1)
132
133static inline unsigned long profile_pc(struct pt_regs *regs)
134{
135 unsigned long pc = instruction_pointer(regs);
136
137 if (virt_addr_uncached(pc))
138 return CAC_ADDR(pc);
139
140 return pc;
141}
142#endif /* __KERNEL__ */
143
144#endif /* __ASM_SH_PTRACE_H */