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