LXR linux/tools/perf/util/jitdump.h

   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
  27enum 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
  37struct 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
  48enum 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) */
  59struct jr_prefix {
  60        uint32_t id;
  61        uint32_t total_size;
  62        uint64_t timestamp;
  63};
  64
  65struct 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
  76struct jr_code_close {
  77        struct jr_prefix p;
  78};
  79
  80struct 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
  92struct 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[]; /* null terminated filename, \xff\0 if same as previous entry */
  97};
  98
  99struct 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[];
 105};
 106
 107struct 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[];
 114};
 115
 116union 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
 125static inline struct debug_entry *
 126debug_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
 133static inline char *
 134debug_entry_file(struct debug_entry *ent)
 135{
 136        void *a = ent + 1;
 137        return a;
 138}
 139
 140#endif /* !JITDUMP_H */
 141