1/*
  2 * jitdump.h: jitted code info encapsulation file format
  3 *
  4 * Adapted from OProfile GPLv2 support jidump.h:
  5 * Copyright 2007 OProfile authors
  6 * Jens Wilke
  7 * Daniel Hansel
  8 * Copyright IBM Corporation 2007
  9 */
 10#ifndef JITDUMP_H
 11#define JITDUMP_H
 12
 13#include <sys/time.h>
 14#include <time.h>
 15#include <stdint.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[0]; /* 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[0];
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[0];
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 */