From 8237e29a164211eb2ec4cd161eb4183cc1947fee Mon Sep 17 00:00:00 2001 From: Cheng Hann Gan Date: Thu, 9 Sep 2021 19:22:48 -0400 Subject: Defined more in-dungeon structs and enums (#53) * Defined DungeonEntity * Rename EntityType enums * Revert EntityType rename * Defined more in-dungeon structs and enums * Added more dungeon global structs/enums * Prefixed dungeonGlobalData with g * Fixed compile errors * Removed some CRLFs * Fixed compile after merge * Revert Makefile * Rename DungeonEntityData.entityType Co-authored-by: Seth Barberee * Renamed symbols per PR comments Co-authored-by: Cheng Hann Gan Co-authored-by: Seth Barberee --- tools/ramscrgen/elf.cpp | 544 ++++++++++++++++++++++++------------------------ 1 file changed, 272 insertions(+), 272 deletions(-) (limited to 'tools/ramscrgen/elf.cpp') diff --git a/tools/ramscrgen/elf.cpp b/tools/ramscrgen/elf.cpp index 7cef9f9..7e78704 100644 --- a/tools/ramscrgen/elf.cpp +++ b/tools/ramscrgen/elf.cpp @@ -1,272 +1,272 @@ -#include -#include -#include -#include -#include -#include -#include "ramscrgen.h" -#include "elf.h" - -#define SHN_COMMON 0xFFF2 - -static std::string s_elfPath; -static std::string s_archiveFilePath; -static std::string s_archiveObjectPath; - -static FILE *s_file; - -static std::uint32_t s_sectionHeaderOffset; -static int s_sectionHeaderEntrySize; -static int s_sectionCount; -static int s_shstrtabIndex; - -static std::uint32_t s_symtabOffset; -static std::uint32_t s_strtabOffset; - -static std::uint32_t s_symbolCount; -static std::uint32_t s_elfFileOffset; - -struct Symbol -{ - std::uint32_t nameOffset; - std::uint32_t size; -}; - -static void Seek(long offset) -{ - if (std::fseek(s_file, s_elfFileOffset + offset, SEEK_SET) != 0) - FATAL_ERROR("error: failed to seek to %ld in \"%s\"", offset, s_elfPath.c_str()); -} - -static void Skip(long offset) -{ - if (std::fseek(s_file, offset, SEEK_CUR) != 0) - FATAL_ERROR("error: failed to skip %ld bytes in \"%s\"", offset, s_elfPath.c_str()); -} - -static std::uint32_t ReadInt8() -{ - int c = std::fgetc(s_file); - - if (c < 0) - FATAL_ERROR("error: unexpected EOF when reading ELF file \"%s\"\n", s_elfPath.c_str()); - - return c; -} - -static std::uint32_t ReadInt16() -{ - std::uint32_t val = 0; - val |= ReadInt8(); - val |= ReadInt8() << 8; - return val; -} - -static std::uint32_t ReadInt32() -{ - std::uint32_t val = 0; - val |= ReadInt8(); - val |= ReadInt8() << 8; - val |= ReadInt8() << 16; - val |= ReadInt8() << 24; - return val; -} - -static std::string ReadString() -{ - std::string s; - char c; - - while ((c = ReadInt8()) != 0) - s += c; - - return s; -} - -static void VerifyElfIdent() -{ - char expectedMagic[4] = { 0x7F, 'E', 'L', 'F' }; - char magic[4]; - - if (std::fread(magic, 4, 1, s_file) != 1) - FATAL_ERROR("error: failed to read ELF magic from \"%s\"\n", s_elfPath.c_str()); - - if (std::memcmp(magic, expectedMagic, 4) != 0) - FATAL_ERROR("error: ELF magic did not match in \"%s\"\n", s_elfPath.c_str()); - - if (std::fgetc(s_file) != 1) - FATAL_ERROR("error: \"%s\" not 32-bit ELF\n", s_elfPath.c_str()); - - if (std::fgetc(s_file) != 1) - FATAL_ERROR("error: \"%s\" not little-endian ELF\n", s_elfPath.c_str()); -} - -static void VerifyAr() -{ - char expectedMagic[8] = {'!', '<', 'a', 'r', 'c', 'h', '>', '\n'}; - char magic[8]; - - if (std::fread(magic, 8, 1, s_file) != 1) - FATAL_ERROR("error: failed to read AR magic from \"%s\"\n", s_archiveFilePath.c_str()); - - if (std::memcmp(magic, expectedMagic, 8) != 0) - FATAL_ERROR("error: AR magic did not match in \"%s\"\n", s_archiveFilePath.c_str()); -} - -static void ReadElfHeader() -{ - Seek(0x20); - s_sectionHeaderOffset = ReadInt32(); - Seek(0x2E); - s_sectionHeaderEntrySize = ReadInt16(); - s_sectionCount = ReadInt16(); - s_shstrtabIndex = ReadInt16(); -} - -static void FindArObj() -{ - char file_ident[17] = {0}; - char filesize_s[11] = {0}; - char expectedEndMagic[2] = { 0x60, 0x0a }; - char end_magic[2]; - std::size_t filesize; - - Seek(8); - while (!std::feof(s_file)) { - if (std::fread(file_ident, 16, 1, s_file) != 1) - FATAL_ERROR("error: failed to read file ident in \"%s\"\n", s_archiveFilePath.c_str()); - Skip(32); - if (std::fread(filesize_s, 10, 1, s_file) != 1) - FATAL_ERROR("error: failed to read filesize in \"%s\"\n", s_archiveFilePath.c_str()); - if (std::fread(end_magic, 2, 1, s_file) != 1) - FATAL_ERROR("error: failed to read end sentinel in \"%s\"\n", s_archiveFilePath.c_str()); - if (std::memcmp(end_magic, expectedEndMagic, 2) != 0) - FATAL_ERROR("error: corrupted archive header in \"%s\" at \"%s\"\n", s_archiveFilePath.c_str(), file_ident); - - char * ptr = std::strchr(file_ident, '/'); - if (ptr != nullptr) - *ptr = 0; - filesize = std::strtoul(filesize_s, nullptr, 10); - if (std::strncmp(s_archiveObjectPath.c_str(), file_ident, 16) == 0) { - s_elfFileOffset = std::ftell(s_file); - return; - } - Skip(filesize); - } - - FATAL_ERROR("error: could not find object \"%s\" in archive \"%s\"\n", s_archiveObjectPath.c_str(), s_archiveFilePath.c_str()); -} - -static std::string GetSectionName(std::uint32_t shstrtabOffset, int index) -{ - Seek(s_sectionHeaderOffset + s_sectionHeaderEntrySize * index); - std::uint32_t nameOffset = ReadInt32(); - Seek(shstrtabOffset + nameOffset); - return ReadString(); -} - -static void FindTableOffsets() -{ - s_symtabOffset = 0; - s_strtabOffset = 0; - - Seek(s_sectionHeaderOffset + s_sectionHeaderEntrySize * s_shstrtabIndex + 0x10); - std::uint32_t shstrtabOffset = ReadInt32(); - - for (int i = 0; i < s_sectionCount; i++) - { - std::string name = GetSectionName(shstrtabOffset, i); - - if (name == ".symtab") - { - if (s_symtabOffset) - FATAL_ERROR("error: mutiple .symtab sections found in \"%s\"\n", s_elfPath.c_str()); - Seek(s_sectionHeaderOffset + s_sectionHeaderEntrySize * i + 0x10); - s_symtabOffset = ReadInt32(); - std::uint32_t size = ReadInt32(); - s_symbolCount = size / 16; - } - else if (name == ".strtab") - { - if (s_strtabOffset) - FATAL_ERROR("error: mutiple .strtab sections found in \"%s\"\n", s_elfPath.c_str()); - Seek(s_sectionHeaderOffset + s_sectionHeaderEntrySize * i + 0x10); - s_strtabOffset = ReadInt32(); - } - } - - if (!s_symtabOffset) - FATAL_ERROR("error: couldn't find .symtab section in \"%s\"\n", s_elfPath.c_str()); - - if (!s_strtabOffset) - FATAL_ERROR("error: couldn't find .strtab section in \"%s\"\n", s_elfPath.c_str()); -} - -static std::map GetCommonSymbols_Shared() -{ - VerifyElfIdent(); - ReadElfHeader(); - FindTableOffsets(); - - std::map commonSymbols; - - std::vector commonSymbolVec; - - Seek(s_symtabOffset); - - for (std::uint32_t i = 0; i < s_symbolCount; i++) - { - Symbol sym; - sym.nameOffset = ReadInt32(); - Skip(4); - sym.size = ReadInt32(); - Skip(2); - std::uint16_t sectionIndex = ReadInt16(); - if (sectionIndex == SHN_COMMON) - commonSymbolVec.push_back(sym); - } - - for (const Symbol& sym : commonSymbolVec) - { - Seek(s_strtabOffset + sym.nameOffset); - std::string name = ReadString(); - commonSymbols[name] = sym.size; - } - - return commonSymbols; -} - -std::map GetCommonSymbolsFromLib(std::string sourcePath, std::string libpath) -{ - std::size_t colonPos = libpath.find(':'); - if (colonPos == std::string::npos) - FATAL_ERROR("error: missing colon separator in libfile \"%s\"\n", s_elfPath.c_str()); - - s_archiveObjectPath = libpath.substr(colonPos + 1); - s_archiveFilePath = sourcePath + "/" + libpath.substr(1, colonPos - 1); - s_elfPath = sourcePath + "/" + libpath.substr(1); - - s_file = std::fopen(s_archiveFilePath.c_str(), "rb"); - - if (s_file == NULL) - FATAL_ERROR("error: failed to open \"%s\" for reading\n", s_archiveFilePath.c_str()); - - VerifyAr(); - FindArObj(); - return GetCommonSymbols_Shared(); -} - -std::map GetCommonSymbols(std::string sourcePath, std::string path) -{ - s_elfFileOffset = 0; - if (path[0] == '*') - return GetCommonSymbolsFromLib(sourcePath, path); - - s_elfPath = sourcePath + "/" + path; - s_file = std::fopen(s_elfPath.c_str(), "rb"); - - if (s_file == NULL) - FATAL_ERROR("error: failed to open \"%s\" for reading\n", path.c_str()); - - return GetCommonSymbols_Shared(); -} +#include +#include +#include +#include +#include +#include +#include "ramscrgen.h" +#include "elf.h" + +#define SHN_COMMON 0xFFF2 + +static std::string s_elfPath; +static std::string s_archiveFilePath; +static std::string s_archiveObjectPath; + +static FILE *s_file; + +static std::uint32_t s_sectionHeaderOffset; +static int s_sectionHeaderEntrySize; +static int s_sectionCount; +static int s_shstrtabIndex; + +static std::uint32_t s_symtabOffset; +static std::uint32_t s_strtabOffset; + +static std::uint32_t s_symbolCount; +static std::uint32_t s_elfFileOffset; + +struct Symbol +{ + std::uint32_t nameOffset; + std::uint32_t size; +}; + +static void Seek(long offset) +{ + if (std::fseek(s_file, s_elfFileOffset + offset, SEEK_SET) != 0) + FATAL_ERROR("error: failed to seek to %ld in \"%s\"", offset, s_elfPath.c_str()); +} + +static void Skip(long offset) +{ + if (std::fseek(s_file, offset, SEEK_CUR) != 0) + FATAL_ERROR("error: failed to skip %ld bytes in \"%s\"", offset, s_elfPath.c_str()); +} + +static std::uint32_t ReadInt8() +{ + int c = std::fgetc(s_file); + + if (c < 0) + FATAL_ERROR("error: unexpected EOF when reading ELF file \"%s\"\n", s_elfPath.c_str()); + + return c; +} + +static std::uint32_t ReadInt16() +{ + std::uint32_t val = 0; + val |= ReadInt8(); + val |= ReadInt8() << 8; + return val; +} + +static std::uint32_t ReadInt32() +{ + std::uint32_t val = 0; + val |= ReadInt8(); + val |= ReadInt8() << 8; + val |= ReadInt8() << 16; + val |= ReadInt8() << 24; + return val; +} + +static std::string ReadString() +{ + std::string s; + char c; + + while ((c = ReadInt8()) != 0) + s += c; + + return s; +} + +static void VerifyElfIdent() +{ + char expectedMagic[4] = { 0x7F, 'E', 'L', 'F' }; + char magic[4]; + + if (std::fread(magic, 4, 1, s_file) != 1) + FATAL_ERROR("error: failed to read ELF magic from \"%s\"\n", s_elfPath.c_str()); + + if (std::memcmp(magic, expectedMagic, 4) != 0) + FATAL_ERROR("error: ELF magic did not match in \"%s\"\n", s_elfPath.c_str()); + + if (std::fgetc(s_file) != 1) + FATAL_ERROR("error: \"%s\" not 32-bit ELF\n", s_elfPath.c_str()); + + if (std::fgetc(s_file) != 1) + FATAL_ERROR("error: \"%s\" not little-endian ELF\n", s_elfPath.c_str()); +} + +static void VerifyAr() +{ + char expectedMagic[8] = {'!', '<', 'a', 'r', 'c', 'h', '>', '\n'}; + char magic[8]; + + if (std::fread(magic, 8, 1, s_file) != 1) + FATAL_ERROR("error: failed to read AR magic from \"%s\"\n", s_archiveFilePath.c_str()); + + if (std::memcmp(magic, expectedMagic, 8) != 0) + FATAL_ERROR("error: AR magic did not match in \"%s\"\n", s_archiveFilePath.c_str()); +} + +static void ReadElfHeader() +{ + Seek(0x20); + s_sectionHeaderOffset = ReadInt32(); + Seek(0x2E); + s_sectionHeaderEntrySize = ReadInt16(); + s_sectionCount = ReadInt16(); + s_shstrtabIndex = ReadInt16(); +} + +static void FindArObj() +{ + char file_ident[17] = {0}; + char filesize_s[11] = {0}; + char expectedEndMagic[2] = { 0x60, 0x0a }; + char end_magic[2]; + std::size_t filesize; + + Seek(8); + while (!std::feof(s_file)) { + if (std::fread(file_ident, 16, 1, s_file) != 1) + FATAL_ERROR("error: failed to read file ident in \"%s\"\n", s_archiveFilePath.c_str()); + Skip(32); + if (std::fread(filesize_s, 10, 1, s_file) != 1) + FATAL_ERROR("error: failed to read filesize in \"%s\"\n", s_archiveFilePath.c_str()); + if (std::fread(end_magic, 2, 1, s_file) != 1) + FATAL_ERROR("error: failed to read end sentinel in \"%s\"\n", s_archiveFilePath.c_str()); + if (std::memcmp(end_magic, expectedEndMagic, 2) != 0) + FATAL_ERROR("error: corrupted archive header in \"%s\" at \"%s\"\n", s_archiveFilePath.c_str(), file_ident); + + char * ptr = std::strchr(file_ident, '/'); + if (ptr != nullptr) + *ptr = 0; + filesize = std::strtoul(filesize_s, nullptr, 10); + if (std::strncmp(s_archiveObjectPath.c_str(), file_ident, 16) == 0) { + s_elfFileOffset = std::ftell(s_file); + return; + } + Skip(filesize); + } + + FATAL_ERROR("error: could not find object \"%s\" in archive \"%s\"\n", s_archiveObjectPath.c_str(), s_archiveFilePath.c_str()); +} + +static std::string GetSectionName(std::uint32_t shstrtabOffset, int index) +{ + Seek(s_sectionHeaderOffset + s_sectionHeaderEntrySize * index); + std::uint32_t nameOffset = ReadInt32(); + Seek(shstrtabOffset + nameOffset); + return ReadString(); +} + +static void FindTableOffsets() +{ + s_symtabOffset = 0; + s_strtabOffset = 0; + + Seek(s_sectionHeaderOffset + s_sectionHeaderEntrySize * s_shstrtabIndex + 0x10); + std::uint32_t shstrtabOffset = ReadInt32(); + + for (int i = 0; i < s_sectionCount; i++) + { + std::string name = GetSectionName(shstrtabOffset, i); + + if (name == ".symtab") + { + if (s_symtabOffset) + FATAL_ERROR("error: mutiple .symtab sections found in \"%s\"\n", s_elfPath.c_str()); + Seek(s_sectionHeaderOffset + s_sectionHeaderEntrySize * i + 0x10); + s_symtabOffset = ReadInt32(); + std::uint32_t size = ReadInt32(); + s_symbolCount = size / 16; + } + else if (name == ".strtab") + { + if (s_strtabOffset) + FATAL_ERROR("error: mutiple .strtab sections found in \"%s\"\n", s_elfPath.c_str()); + Seek(s_sectionHeaderOffset + s_sectionHeaderEntrySize * i + 0x10); + s_strtabOffset = ReadInt32(); + } + } + + if (!s_symtabOffset) + FATAL_ERROR("error: couldn't find .symtab section in \"%s\"\n", s_elfPath.c_str()); + + if (!s_strtabOffset) + FATAL_ERROR("error: couldn't find .strtab section in \"%s\"\n", s_elfPath.c_str()); +} + +static std::map GetCommonSymbols_Shared() +{ + VerifyElfIdent(); + ReadElfHeader(); + FindTableOffsets(); + + std::map commonSymbols; + + std::vector commonSymbolVec; + + Seek(s_symtabOffset); + + for (std::uint32_t i = 0; i < s_symbolCount; i++) + { + Symbol sym; + sym.nameOffset = ReadInt32(); + Skip(4); + sym.size = ReadInt32(); + Skip(2); + std::uint16_t sectionIndex = ReadInt16(); + if (sectionIndex == SHN_COMMON) + commonSymbolVec.push_back(sym); + } + + for (const Symbol& sym : commonSymbolVec) + { + Seek(s_strtabOffset + sym.nameOffset); + std::string name = ReadString(); + commonSymbols[name] = sym.size; + } + + return commonSymbols; +} + +std::map GetCommonSymbolsFromLib(std::string sourcePath, std::string libpath) +{ + std::size_t colonPos = libpath.find(':'); + if (colonPos == std::string::npos) + FATAL_ERROR("error: missing colon separator in libfile \"%s\"\n", s_elfPath.c_str()); + + s_archiveObjectPath = libpath.substr(colonPos + 1); + s_archiveFilePath = sourcePath + "/" + libpath.substr(1, colonPos - 1); + s_elfPath = sourcePath + "/" + libpath.substr(1); + + s_file = std::fopen(s_archiveFilePath.c_str(), "rb"); + + if (s_file == NULL) + FATAL_ERROR("error: failed to open \"%s\" for reading\n", s_archiveFilePath.c_str()); + + VerifyAr(); + FindArObj(); + return GetCommonSymbols_Shared(); +} + +std::map GetCommonSymbols(std::string sourcePath, std::string path) +{ + s_elfFileOffset = 0; + if (path[0] == '*') + return GetCommonSymbolsFromLib(sourcePath, path); + + s_elfPath = sourcePath + "/" + path; + s_file = std::fopen(s_elfPath.c_str(), "rb"); + + if (s_file == NULL) + FATAL_ERROR("error: failed to open \"%s\" for reading\n", path.c_str()); + + return GetCommonSymbols_Shared(); +} -- cgit v1.2.3