97 static int readElfHeader(ifstream& elfFile, Elf64_Ehdr* eh) {  in readElfHeader()  argument
98     elfFile.seekg(0);  in readElfHeader()
99     if (elfFile.fail()) return -1;  in readElfHeader()
101     if (!elfFile.read((char*)eh, sizeof(*eh))) return -1;  in readElfHeader()
107 static int readSectionHeadersAll(ifstream& elfFile, vector<Elf64_Shdr>& shTable) {  in readSectionHeadersAll()  argument
111     ret = readElfHeader(elfFile, &eh);  in readSectionHeadersAll()
114     elfFile.seekg(eh.e_shoff);  in readSectionHeadersAll()
115     if (elfFile.fail()) return -1;  in readSectionHeadersAll()
120     if (!elfFile.read((char*)shTable.data(), (eh.e_shnum * eh.e_shentsize))) return -ENOMEM;  in readSectionHeadersAll()
126 static int readSectionByIdx(ifstream& elfFile, int id, vector<char>& sec) {  in readSectionByIdx()  argument
130     ret = readSectionHeadersAll(elfFile, shTable);  in readSectionByIdx()
134     elfFile.seekg(shTable[id].sh_offset);  in readSectionByIdx()
135     if (elfFile.fail()) return -1;  in readSectionByIdx()
138     if (!elfFile.read(sec.data(), shTable[id].sh_size)) return -1;  in readSectionByIdx()
144 static int readSectionHeaderStrtab(ifstream& elfFile, vector<char>& strtab) {  in readSectionHeaderStrtab()  argument
148     ret = readElfHeader(elfFile, &eh);  in readSectionHeaderStrtab()
151     ret = readSectionByIdx(elfFile, eh.e_shstrndx, strtab);  in readSectionHeaderStrtab()
158 static int getSymName(ifstream& elfFile, int nameOff, string& name) {  in getSymName()  argument
162     ret = readSectionHeaderStrtab(elfFile, secStrTab);  in getSymName()
172 static int readSectionByName(const char* name, ifstream& elfFile, vector<char>& data) {  in readSectionByName()  argument
177     ret = readSectionHeadersAll(elfFile, shTable);  in readSectionByName()
180     ret = readSectionHeaderStrtab(elfFile, secStrTab);  in readSectionByName()
191             elfFile.seekg(shTable[i].sh_offset);  in readSectionByName()
192             if (elfFile.fail()) return -1;  in readSectionByName()
194             if (!elfFile.read((char*)dataTmp.data(), shTable[i].sh_size)) return -1;  in readSectionByName()
203 static int readSectionByType(ifstream& elfFile, int type, vector<char>& data) {  in readSectionByType()  argument
207     ret = readSectionHeadersAll(elfFile, shTable);  in readSectionByType()
216         elfFile.seekg(shTable[i].sh_offset);  in readSectionByType()
217         if (elfFile.fail()) return -1;  in readSectionByType()
219         if (!elfFile.read((char*)dataTmp.data(), shTable[i].sh_size)) return -1;  in readSectionByType()
231 static int readSymTab(ifstream& elfFile, int sort, vector<Elf64_Sym>& data) {  in readSymTab()  argument
236     ret = readSectionByType(elfFile, SHT_SYMTAB, secData);  in readSymTab()
279 static int readProgDefs(ifstream& elfFile, vector<struct bpf_prog_def>& pd) {  in readProgDefs()  argument
281     int ret = readSectionByName("progs", elfFile, pdData);  in readProgDefs()
290 static int getSectionSymNames(ifstream& elfFile, const string& sectionName, vector<string>& names) {  in getSectionSymNames()  argument
296     ret = readSymTab(elfFile, 1 /* sort */, symtab);  in getSectionSymNames()
300     ret = readSectionHeadersAll(elfFile, shTable);  in getSectionSymNames()
305         ret = getSymName(elfFile, shTable[i].sh_name, name);  in getSectionSymNames()
323             ret = getSymName(elfFile, symtab[i].st_name, s);  in getSectionSymNames()
333 static int readCodeSections(ifstream& elfFile, vector<codeSection>& cs) {  in readCodeSections()  argument
337     ret = readSectionHeadersAll(elfFile, shTable);  in readCodeSections()
342     ret = readProgDefs(elfFile, pd);  in readCodeSections()
345     ret = getSectionSymNames(elfFile, "progs", progDefNames);  in readCodeSections()
353         ret = getSymName(elfFile, shTable[i].sh_name, name);  in readCodeSections()
363             ret = readSectionByIdx(elfFile, i, cs_temp.data);  in readCodeSections()
368             ret = getSectionSymNames(elfFile, oldName, csSymNames);  in readCodeSections()
380             ret = getSymName(elfFile, shTable[i + 1].sh_name, name);  in readCodeSections()
384                 ret = readSectionByIdx(elfFile, i + 1, cs_temp.rel_data);  in readCodeSections()
398 static int getSymNameByIdx(ifstream& elfFile, int index, string& name) {  in getSymNameByIdx()  argument
402     ret = readSymTab(elfFile, 0 /* !sort */, symtab);  in getSymNameByIdx()
407     return getSymName(elfFile, symtab[index].st_name, name);  in getSymNameByIdx()
410 static int createMaps(const char* elfPath, ifstream& elfFile, vector<unique_fd>& mapFds) {  in createMaps()  argument
417     ret = readSectionByName("maps", elfFile, mdData);  in createMaps()
423     ret = getSectionSymNames(elfFile, "maps", mapNames);  in createMaps()
506 static void applyMapRelo(ifstream& elfFile, vector<unique_fd> &mapFds, vector<codeSection>& cs) {  in applyMapRelo()  argument
509     int ret = getSectionSymNames(elfFile, "maps", mapNames);  in applyMapRelo()
520             ret = getSymNameByIdx(elfFile, symIndex, symName);  in applyMapRelo()
626     ifstream elfFile(elfPath, ios::in | ios::binary);  in loadProg()  local
627     if (!elfFile.is_open()) return -1;  in loadProg()
629     ret = readSectionByName("critical", elfFile, critical);  in loadProg()
632     ret = readSectionByName("license", elfFile, license);  in loadProg()
642     ret = readCodeSections(elfFile, cs);  in loadProg()
651     ret = createMaps(elfPath, elfFile, mapFds);  in loadProg()
660     applyMapRelo(elfFile, mapFds, cs);  in loadProg()