70   MapEntry* entry = new MapEntry(start, end, offset, name, name_len, flags);  in parse_line()  local
73     entry->load_bias = 0;  in parse_line()
74     entry->init = true;  in parse_line()
75     entry->valid = false;  in parse_line()
77   return entry;  in parse_line()
81 static inline bool get_val(MapEntry* entry, uintptr_t addr, T* store) {  in get_val()  argument
82   if (!(entry->flags & PROT_READ) || addr < entry->start || addr + sizeof(T) > entry->end) {  in get_val()
93 static bool valid_elf(MapEntry* entry) {  in valid_elf()  argument
94   uintptr_t addr = entry->start;  in valid_elf()
96   if (__builtin_add_overflow(addr, SELFMAG, &end) || end >= entry->end) {  in valid_elf()
103 static void read_loadbias(MapEntry* entry) {  in read_loadbias()  argument
104   entry->load_bias = 0;  in read_loadbias()
105   uintptr_t addr = entry->start;  in read_loadbias()
107   if (!get_val<ElfW(Half)>(entry, addr + offsetof(ElfW(Ehdr), e_phnum), &ehdr.e_phnum)) {  in read_loadbias()
110   if (!get_val<ElfW(Off)>(entry, addr + offsetof(ElfW(Ehdr), e_phoff), &ehdr.e_phoff)) {  in read_loadbias()
116     if (!get_val<ElfW(Word)>(entry, addr + offsetof(ElfW(Phdr), p_type), &phdr.p_type)) {  in read_loadbias()
119     if (!get_val<ElfW(Word)>(entry, addr + offsetof(ElfW(Phdr), p_flags), &phdr.p_flags)) {  in read_loadbias()
122     if (!get_val<ElfW(Off)>(entry, addr + offsetof(ElfW(Phdr), p_offset), &phdr.p_offset)) {  in read_loadbias()
126       if (!get_val<ElfW(Addr)>(entry, addr + offsetof(ElfW(Phdr), p_vaddr), &phdr.p_vaddr)) {  in read_loadbias()
129       entry->load_bias = phdr.p_vaddr - phdr.p_offset;  in read_loadbias()
136 static void inline init(MapEntry* entry) {  in init()  argument
137   if (entry->init) {  in init()
140   entry->init = true;  in init()
141   if (valid_elf(entry)) {  in init()
142     entry->valid = true;  in init()
143     read_loadbias(entry);  in init()
155     MapEntry* entry = parse_line(buffer.data());  in ReadMaps()  local
156     if (entry == nullptr) {  in ReadMaps()
161     auto it = entries_.find(entry);  in ReadMaps()
163       entries_.insert(entry);  in ReadMaps()
165       delete entry;  in ReadMaps()
173   for (auto* entry : entries_) {  in ~MapData()  local
174     delete entry;  in ~MapData()
194   MapEntry* entry = *it;  in find()  local
195   init(entry);  in find()
200     if (!entry->valid && it != entries_.begin()) {  in find()
202       if (prev_entry->flags == PROT_READ && prev_entry->offset < entry->offset &&  in find()
203           prev_entry->name == entry->name) {  in find()
207           entry->elf_start_offset = prev_entry->offset;  in find()
208           *rel_pc = pc - entry->start + entry->offset + prev_entry->load_bias;  in find()
209           return entry;  in find()
213     *rel_pc = pc - entry->start + entry->load_bias;  in find()
215   return entry;  in find()