265 static int readElfHeader(ifstream& elfFile, Elf64_Ehdr* eh) {  in readElfHeader()  argument
266     elfFile.seekg(0);  in readElfHeader()
267     if (elfFile.fail()) return -1;  in readElfHeader()
269     if (!elfFile.read((char*)eh, sizeof(*eh))) return -1;  in readElfHeader()
275 static int readSectionHeadersAll(ifstream& elfFile, vector<Elf64_Shdr>& shTable) {  in readSectionHeadersAll()  argument
279     ret = readElfHeader(elfFile, &eh);  in readSectionHeadersAll()
282     elfFile.seekg(eh.e_shoff);  in readSectionHeadersAll()
283     if (elfFile.fail()) return -1;  in readSectionHeadersAll()
288     if (!elfFile.read((char*)shTable.data(), (eh.e_shnum * eh.e_shentsize))) return -ENOMEM;  in readSectionHeadersAll()
294 static int readSectionByIdx(ifstream& elfFile, int id, vector<char>& sec) {  in readSectionByIdx()  argument
296     int ret = readSectionHeadersAll(elfFile, shTable);  in readSectionByIdx()
299     elfFile.seekg(shTable[id].sh_offset);  in readSectionByIdx()
300     if (elfFile.fail()) return -1;  in readSectionByIdx()
303     if (!elfFile.read(sec.data(), shTable[id].sh_size)) return -1;  in readSectionByIdx()
309 static int readSectionHeaderStrtab(ifstream& elfFile, vector<char>& strtab) {  in readSectionHeaderStrtab()  argument
311     int ret = readElfHeader(elfFile, &eh);  in readSectionHeaderStrtab()
314     ret = readSectionByIdx(elfFile, eh.e_shstrndx, strtab);  in readSectionHeaderStrtab()
321 static int getSymName(ifstream& elfFile, int nameOff, string& name) {  in getSymName()  argument
325     ret = readSectionHeaderStrtab(elfFile, secStrTab);  in getSymName()
335 static int readSectionByName(const char* name, ifstream& elfFile, vector<char>& data) {  in readSectionByName()  argument
340     ret = readSectionHeadersAll(elfFile, shTable);  in readSectionByName()
343     ret = readSectionHeaderStrtab(elfFile, secStrTab);  in readSectionByName()
354             elfFile.seekg(shTable[i].sh_offset);  in readSectionByName()
355             if (elfFile.fail()) return -1;  in readSectionByName()
357             if (!elfFile.read((char*)dataTmp.data(), shTable[i].sh_size)) return -1;  in readSectionByName()
366 unsigned int readSectionUint(const char* name, ifstream& elfFile) {  in readSectionUint()  argument
368     int ret = readSectionByName(name, elfFile, theBytes);  in readSectionUint()
389 static int readSectionByType(ifstream& elfFile, int type, vector<char>& data) {  in readSectionByType()  argument
393     ret = readSectionHeadersAll(elfFile, shTable);  in readSectionByType()
402         elfFile.seekg(shTable[i].sh_offset);  in readSectionByType()
403         if (elfFile.fail()) return -1;  in readSectionByType()
405         if (!elfFile.read((char*)dataTmp.data(), shTable[i].sh_size)) return -1;  in readSectionByType()
417 static int readSymTab(ifstream& elfFile, int sort, vector<Elf64_Sym>& data) {  in readSymTab()  argument
422     ret = readSectionByType(elfFile, SHT_SYMTAB, secData);  in readSymTab()
440 static int readProgDefs(ifstream& elfFile, vector<struct bpf_prog_def>& pd) {  in readProgDefs()  argument
442     int ret = readSectionByName("progs", elfFile, pdData);  in readProgDefs()
462 static int getSectionSymNames(ifstream& elfFile, const string& sectionName, vector<string>& names,  in getSectionSymNames()  argument
469     ret = readSymTab(elfFile, 1 /* sort */, symtab);  in getSectionSymNames()
473     ret = readSectionHeadersAll(elfFile, shTable);  in getSectionSymNames()
478         ret = getSymName(elfFile, shTable[i].sh_name, name);  in getSectionSymNames()
498             ret = getSymName(elfFile, symtab[i].st_name, s);  in getSectionSymNames()
508 static int readCodeSections(ifstream& elfFile, vector<codeSection>& cs) {  in readCodeSections()  argument
512     ret = readSectionHeadersAll(elfFile, shTable);  in readCodeSections()
517     ret = readProgDefs(elfFile, pd);  in readCodeSections()
520     ret = getSectionSymNames(elfFile, "progs", progDefNames);  in readCodeSections()
528         ret = getSymName(elfFile, shTable[i].sh_name, name);  in readCodeSections()
547         ret = readSectionByIdx(elfFile, i, cs_temp.data);  in readCodeSections()
552         ret = getSectionSymNames(elfFile, oldName, csSymNames, STT_FUNC);  in readCodeSections()
563             ret = getSymName(elfFile, shTable[i + 1].sh_name, name);  in readCodeSections()
567                 ret = readSectionByIdx(elfFile, i + 1, cs_temp.rel_data);  in readCodeSections()
581 static int getSymNameByIdx(ifstream& elfFile, int index, string& name) {  in getSymNameByIdx()  argument
585     ret = readSymTab(elfFile, 0 /* !sort */, symtab);  in getSymNameByIdx()
590     return getSymName(elfFile, symtab[index].st_name, name);  in getSymNameByIdx()
652 static int createMaps(const char* elfPath, ifstream& elfFile, vector<unique_fd>& mapFds,  in createMaps()  argument
660     ret = readSectionByName("maps", elfFile, mdData);  in createMaps()
679     ret = getSectionSymNames(elfFile, "maps", mapNames);  in createMaps()
898 static void applyMapRelo(ifstream& elfFile, vector<unique_fd> &mapFds, vector<codeSection>& cs) {  in applyMapRelo()  argument
901     int ret = getSectionSymNames(elfFile, "maps", mapNames);  in applyMapRelo()
912             ret = getSymNameByIdx(elfFile, symIndex, symName);  in applyMapRelo()
1118     ifstream elfFile(elfPath, ios::in | ios::binary);  in loadProg()  local
1119     if (!elfFile.is_open()) return -1;  in loadProg()
1121     ret = readSectionByName("license", elfFile, license);  in loadProg()
1130     unsigned int bpfLoaderMinVer = readSectionUint("bpfloader_min_ver", elfFile);  in loadProg()
1131     unsigned int bpfLoaderMaxVer = readSectionUint("bpfloader_max_ver", elfFile);  in loadProg()
1150     ret = createMaps(elfPath, elfFile, mapFds, prefix, bpfloader_ver);  in loadProg()
1159     ret = readCodeSections(elfFile, cs);  in loadProg()
1169     applyMapRelo(elfFile, mapFds, cs);  in loadProg()