1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * jitdump.h: jitted code info encapsulation file format
4 *
5 * Adapted from OProfile GPLv2 support jidump.h:
6 * Copyright 2007 OProfile authors
7 * Jens Wilke
8 * Daniel Hansel
9 * Copyright IBM Corporation 2007
10 */
11 #ifndef JITDUMP_H
12 #define JITDUMP_H
13
14 #include <sys/time.h>
15 #include <time.h>
16 #include <stdint.h>
17
18 /* JiTD */
19 #define JITHEADER_MAGIC 0x4A695444
20 #define JITHEADER_MAGIC_SW 0x4454694A
21
22 #define PADDING_8ALIGNED(x) ((((x) + 7) & 7) ^ 7)
23 #define ALIGN_8(x) (((x) + 7) & (~7))
24
25 #define JITHEADER_VERSION 1
26
27 enum jitdump_flags_bits {
28 JITDUMP_FLAGS_ARCH_TIMESTAMP_BIT,
29 JITDUMP_FLAGS_MAX_BIT,
30 };
31
32 #define JITDUMP_FLAGS_ARCH_TIMESTAMP (1ULL << JITDUMP_FLAGS_ARCH_TIMESTAMP_BIT)
33
34 #define JITDUMP_FLAGS_RESERVED (JITDUMP_FLAGS_MAX_BIT < 64 ? \
35 (~((1ULL << JITDUMP_FLAGS_MAX_BIT) - 1)) : 0)
36
37 struct jitheader {
38 uint32_t magic; /* characters "jItD" */
39 uint32_t version; /* header version */
40 uint32_t total_size; /* total size of header */
41 uint32_t elf_mach; /* elf mach target */
42 uint32_t pad1; /* reserved */
43 uint32_t pid; /* JIT process id */
44 uint64_t timestamp; /* timestamp */
45 uint64_t flags; /* flags */
46 };
47
48 enum jit_record_type {
49 JIT_CODE_LOAD = 0,
50 JIT_CODE_MOVE = 1,
51 JIT_CODE_DEBUG_INFO = 2,
52 JIT_CODE_CLOSE = 3,
53 JIT_CODE_UNWINDING_INFO = 4,
54
55 JIT_CODE_MAX,
56 };
57
58 /* record prefix (mandatory in each record) */
59 struct jr_prefix {
60 uint32_t id;
61 uint32_t total_size;
62 uint64_t timestamp;
63 };
64
65 struct jr_code_load {
66 struct jr_prefix p;
67
68 uint32_t pid;
69 uint32_t tid;
70 uint64_t vma;
71 uint64_t code_addr;
72 uint64_t code_size;
73 uint64_t code_index;
74 };
75
76 struct jr_code_close {
77 struct jr_prefix p;
78 };
79
80 struct jr_code_move {
81 struct jr_prefix p;
82
83 uint32_t pid;
84 uint32_t tid;
85 uint64_t vma;
86 uint64_t old_code_addr;
87 uint64_t new_code_addr;
88 uint64_t code_size;
89 uint64_t code_index;
90 };
91
92 struct debug_entry {
93 uint64_t addr;
94 int lineno; /* source line number starting at 1 */
95 int discrim; /* column discriminator, 0 is default */
96 const char name[0]; /* null terminated filename, \xff\0 if same as previous entry */
97 };
98
99 struct jr_code_debug_info {
100 struct jr_prefix p;
101
102 uint64_t code_addr;
103 uint64_t nr_entry;
104 struct debug_entry entries[0];
105 };
106
107 struct jr_code_unwinding_info {
108 struct jr_prefix p;
109
110 uint64_t unwinding_size;
111 uint64_t eh_frame_hdr_size;
112 uint64_t mapped_size;
113 const char unwinding_data[0];
114 };
115
116 union jr_entry {
117 struct jr_code_debug_info info;
118 struct jr_code_close close;
119 struct jr_code_load load;
120 struct jr_code_move move;
121 struct jr_prefix prefix;
122 struct jr_code_unwinding_info unwinding;
123 };
124
125 static inline struct debug_entry *
debug_entry_next(struct debug_entry * ent)126 debug_entry_next(struct debug_entry *ent)
127 {
128 void *a = ent + 1;
129 size_t l = strlen(ent->name) + 1;
130 return a + l;
131 }
132
133 static inline char *
debug_entry_file(struct debug_entry * ent)134 debug_entry_file(struct debug_entry *ent)
135 {
136 void *a = ent + 1;
137 return a;
138 }
139
140 #endif /* !JITDUMP_H */
141
