blob: 631a5bbf84e3037f5b155451c05ce08577778767 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
/* -*- linux-c -*-
* Copyright (C) 2005-2008 Red Hat Inc.
*
* This file is part of systemtap, and is free software. You can
* redistribute it and/or modify it under the terms of the GNU General
* Public License (GPL); either version 2, or (at your option) any
* later version.
*/
#ifndef _STP_SYM_H_
#define _STP_SYM_H_
#define STP_MODULE_NAME_LEN 64
struct _stp_symbol {
unsigned long addr;
const char *symbol;
};
DEFINE_RWLOCK(_stp_module_lock);
#define STP_RLOCK_MODULES read_lock_irqsave(&_stp_module_lock, flags)
#define STP_WLOCK_MODULES write_lock_irqsave(&_stp_module_lock, flags)
#define STP_RUNLOCK_MODULES read_unlock_irqrestore(&_stp_module_lock, flags)
#define STP_WUNLOCK_MODULES write_unlock_irqrestore(&_stp_module_lock, flags)
struct _stp_module {
/* the module name, or "" for kernel */
char name[STP_MODULE_NAME_LEN];
/* A pointer to the struct module. Note that we cannot */
/* trust this because as of 2.6.19, there are not yet */
/* any notifier hooks that will tell us when a module */
/* is unloading. */
unsigned long module;
/* the start of the module's text and data sections */
unsigned long text;
unsigned long data;
uint32_t text_size;
/* how many symbols this module has that we are interested in */
uint32_t num_symbols;
/* how many sections this module has */
uint32_t num_sections;
/* how the data below was allocated */
/* 0 = kmalloc, 1 = vmalloc */
struct {
unsigned symbols :1;
unsigned symbol_data :1;
unsigned unwind_data :1;
unsigned unwind_hdr :1;
} allocated;
struct _stp_symbol *sections;
/* an array of num_symbols _stp_symbol structs */
struct _stp_symbol *symbols; /* ordered by address */
/* where we stash our copy of the strtab */
void *symbol_data;
/* the stack unwind data for this module */
void *unwind_data;
void *unwind_hdr;
uint32_t unwind_data_len;
uint32_t unwind_hdr_len;
uint32_t unwind_is_ehframe; /* unwind data comes from .eh_frame */
rwlock_t lock; /* lock while unwinding is happening */
};
#ifndef STP_MAX_MODULES
#define STP_MAX_MODULES 256
#endif
/* the alphabetical array of modules */
struct _stp_module *_stp_modules[STP_MAX_MODULES];
/* the array of modules ordered by addresses */
struct _stp_module *_stp_modules_by_addr[STP_MAX_MODULES];
/* the number of modules in the arrays */
int _stp_num_modules = 0;
unsigned long _stp_module_relocate (const char *module, const char *section, unsigned long offset);
static struct _stp_module *_stp_get_unwind_info (unsigned long addr);
#endif /* _STP_SYM_H_ */
|
