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[]; /* 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[]; 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[]; 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 * 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 * 134 debug_entry_file(struct debug_entry *ent) 135 { 136 void *a = ent + 1; 137 return a; 138 } 139 140 #endif /* !JITDUMP_H */ 141