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7c97f91e MM |
1 | /* Linux-dependent part of branch trace support for GDB, and GDBserver. |
2 | ||
32d0add0 | 3 | Copyright (C) 2013-2015 Free Software Foundation, Inc. |
7c97f91e MM |
4 | |
5 | Contributed by Intel Corp. <markus.t.metzger@intel.com> | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #ifndef LINUX_BTRACE_H | |
23 | #define LINUX_BTRACE_H | |
24 | ||
25 | #include "btrace-common.h" | |
7c97f91e | 26 | #include "vec.h" |
7c97f91e MM |
27 | #if HAVE_LINUX_PERF_EVENT_H |
28 | # include <linux/perf_event.h> | |
29 | #endif | |
30 | ||
53f81362 GB |
31 | struct target_ops; |
32 | ||
aadf7753 MM |
33 | #if HAVE_LINUX_PERF_EVENT_H |
34 | /* A Linux perf event buffer. */ | |
35 | struct perf_event_buffer | |
36 | { | |
37 | /* The mapped memory. */ | |
38 | const uint8_t *mem; | |
39 | ||
40 | /* The size of the mapped memory in bytes. */ | |
e7b01ce0 | 41 | size_t size; |
aadf7753 MM |
42 | |
43 | /* A pointer to the data_head field for this buffer. */ | |
e7b01ce0 | 44 | volatile __u64 *data_head; |
aadf7753 MM |
45 | |
46 | /* The data_head value from the last read. */ | |
e7b01ce0 | 47 | __u64 last_head; |
aadf7753 | 48 | }; |
aadf7753 | 49 | |
f4abbc16 MM |
50 | /* Branch trace target information for BTS tracing. */ |
51 | struct btrace_tinfo_bts | |
7c97f91e | 52 | { |
7c97f91e MM |
53 | /* The Linux perf_event configuration for collecting the branch trace. */ |
54 | struct perf_event_attr attr; | |
55 | ||
aadf7753 | 56 | /* The perf event file. */ |
7c97f91e | 57 | int file; |
aadf7753 MM |
58 | |
59 | /* The perf event configuration page. */ | |
60 | volatile struct perf_event_mmap_page *header; | |
61 | ||
62 | /* The BTS perf event buffer. */ | |
63 | struct perf_event_buffer bts; | |
f4abbc16 | 64 | }; |
b20a6524 MM |
65 | |
66 | /* Branch trace target information for Intel(R) Processor Trace. */ | |
67 | struct btrace_tinfo_pt | |
68 | { | |
69 | /* The Linux perf_event configuration for collecting the branch trace. */ | |
70 | struct perf_event_attr attr; | |
71 | ||
72 | /* The perf event file. */ | |
73 | int file; | |
74 | ||
75 | /* The perf event configuration page. */ | |
76 | volatile struct perf_event_mmap_page *header; | |
77 | ||
78 | /* The trace perf event buffer. */ | |
79 | struct perf_event_buffer pt; | |
80 | }; | |
f4abbc16 MM |
81 | #endif /* HAVE_LINUX_PERF_EVENT_H */ |
82 | ||
83 | /* Branch trace target information per thread. */ | |
84 | struct btrace_target_info | |
85 | { | |
86 | /* The ptid of this thread. */ | |
87 | ptid_t ptid; | |
88 | ||
89 | /* The obtained branch trace configuration. */ | |
90 | struct btrace_config conf; | |
91 | ||
92 | #if HAVE_LINUX_PERF_EVENT_H | |
93 | /* The branch tracing format specific information. */ | |
94 | union | |
95 | { | |
96 | /* CONF.FORMAT == BTRACE_FORMAT_BTS. */ | |
97 | struct btrace_tinfo_bts bts; | |
b20a6524 MM |
98 | |
99 | /* CONF.FORMAT == BTRACE_FORMAT_PT. */ | |
100 | struct btrace_tinfo_pt pt; | |
f4abbc16 | 101 | } variant; |
7c97f91e MM |
102 | #endif /* HAVE_LINUX_PERF_EVENT_H */ |
103 | ||
104 | /* The size of a pointer in bits for this thread. | |
105 | The information is used to identify kernel addresses in order to skip | |
106 | records from/to kernel space. */ | |
107 | int ptr_bits; | |
108 | }; | |
109 | ||
969c39fb | 110 | /* See to_supports_btrace in target.h. */ |
043c3577 | 111 | extern int linux_supports_btrace (struct target_ops *, enum btrace_format); |
7c97f91e | 112 | |
969c39fb | 113 | /* See to_enable_btrace in target.h. */ |
f4abbc16 MM |
114 | extern struct btrace_target_info * |
115 | linux_enable_btrace (ptid_t ptid, const struct btrace_config *conf); | |
7c97f91e | 116 | |
969c39fb MM |
117 | /* See to_disable_btrace in target.h. */ |
118 | extern enum btrace_error linux_disable_btrace (struct btrace_target_info *ti); | |
7c97f91e | 119 | |
969c39fb | 120 | /* See to_read_btrace in target.h. */ |
734b0e4b | 121 | extern enum btrace_error linux_read_btrace (struct btrace_data *btrace, |
969c39fb MM |
122 | struct btrace_target_info *btinfo, |
123 | enum btrace_read_type type); | |
7c97f91e | 124 | |
f4abbc16 MM |
125 | /* See to_btrace_conf in target.h. */ |
126 | extern const struct btrace_config * | |
127 | linux_btrace_conf (const struct btrace_target_info *); | |
128 | ||
7c97f91e | 129 | #endif /* LINUX_BTRACE_H */ |