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PEFFFile.hh
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PEFFFile.hh
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#pragma once
#include <inttypes.h>
#include <map>
#include <phosg/Encoding.hh>
#include <memory>
#include <vector>
#include "../Emulators/MemoryContext.hh"
////////////////////////////////////////////////////////////////////////////////
// Overall structure
// PEFF files have, in this order:
// - PEFFHeader
// - PEFFSectionHeader[PEFFHeader.section_count]
// - Section name table
// - Section contents
struct PEFFHeader {
be_uint32_t magic1; // 'Joy!'
be_uint32_t magic2; // 'peff'
be_uint32_t arch; // 'pwpc' or 'm68k'
be_uint32_t format_version;
be_uint32_t timestamp;
be_uint32_t old_def_version;
be_uint32_t old_imp_version;
be_uint32_t current_version;
be_uint16_t section_count; // total section count
be_uint16_t inst_section_count; // sections required for execution
be_uint32_t reserved;
} __attribute__((packed));
enum class PEFFSectionKind {
EXECUTABLE_READONLY = 0, // uncompressed, read-only, executable
UNPACKED_DATA = 1, // uncompressed, read/write, followed by zeroes if needed
PATTERN_DATA = 2,
CONSTANT = 3, // uncompressed, read-only, non-executable
LOADER = 4, // imports, exports, entry points
DEBUG_RESERVED = 5, // reserved
EXECUTABLE_READWRITE = 6, // uncompressed (?), read/write, executable
EXCEPTION_RESERVED = 7, // reserved
TRACEBACK_RESERVED = 8, // reserved
};
const char* name_for_section_kind(PEFFSectionKind k);
enum PEFFShareKind {
PROCESS = 1, // shared within each process, copied for other processes
GLOBAL = 4, // shared with all processes
PROTECTED = 5, // shared with all processes, read-only unless privileged mode
};
const char* name_for_share_kind(PEFFShareKind k);
struct PEFFSectionHeader {
be_int32_t name_offset; // -1 = no name
be_uint32_t default_address;
be_uint32_t total_size;
be_uint32_t unpacked_size;
be_uint32_t packed_size;
be_uint32_t container_offset;
uint8_t section_kind; // PEFFSectionKind enum
uint8_t share_kind;
uint8_t alignment;
uint8_t reserved;
} __attribute__((packed));
////////////////////////////////////////////////////////////////////////////////
// Loader section structure
// The loader section has, in this order:
// - PEFFLoaderSectionHeader
// - PEFFLoaderImportLibrary[header.imported_lib_count]
// - PEFFLoaderImportSymbol[header.imported_symbol_count]
// - PEFFLoaderRelocationHeader[header.rel_section_count]
// - Relocations
// - String table
// - Export hash table
// - Export key table
// - Exported symbol table
struct PEFFLoaderSectionHeader {
be_int32_t main_symbol_section_index; // -1 if no main symbol
be_uint32_t main_symbol_offset; // offset within the section
be_int32_t init_symbol_section_index; // -1 if no init symbol
be_uint32_t init_symbol_offset; // offset within the section
be_int32_t term_symbol_section_index; // -1 if no term symbol
be_uint32_t term_symbol_offset; // offset within the section
be_uint32_t imported_lib_count;
be_uint32_t imported_symbol_count;
be_uint32_t rel_section_count; // number of sections containing relocations
be_uint32_t rel_commands_offset; // from beginning of loader section
be_uint32_t string_table_offset; // from beginning of loader section
be_uint32_t export_hash_offset; // from beginning of loader section
be_uint32_t export_hash_power; // number of entries is 2^export_hash_power
be_uint32_t exported_symbol_count;
} __attribute__((packed));
enum PEFFImportLibraryFlags {
// If library not found, don't fail - just set all import addrs to zero
WEAK_IMPORT = 0x40,
// Library must be initialized before the client fragment
EARLY_INIT_REQUIRED = 0x80,
};
struct PEFFLoaderImportLibrary {
be_uint32_t name_offset; // from beginning of loader string table
be_uint32_t old_imp_version;
be_uint32_t current_version;
be_uint32_t imported_symbol_count; // number of symbols imported from this lib
be_uint32_t start_index; // first import's index in imported symbol table
uint8_t options; // bits in PEFFImportLibraryFlags
uint8_t reserved1;
be_uint16_t reserved2;
} __attribute__((packed));
enum PEFFLoaderImportSymbolType {
CODE = 0,
DATA = 1,
TVECT = 2,
TOC = 3,
GLUE = 4,
};
enum PEFFLoaderImportSymbolFlags {
WEAK = 0x80,
};
struct PEFFLoaderImportSymbol {
be_uint32_t u;
inline uint8_t flags() const {
return (this->u >> 28) & 0x0F;
}
inline uint8_t type() const {
return (this->u >> 24) & 0x0F;
}
inline uint32_t name_offset() const {
return this->u & 0x00FFFFFF;
}
} __attribute__((packed));
struct PEFFLoaderRelocationHeader {
be_uint16_t section_index;
be_uint16_t reserved;
// Some relocation commands are multiple words, so this isn't necessarily the
// same as the command count
be_uint32_t word_count;
be_uint32_t start_offset;
} __attribute__((packed));
struct PEFFLoaderExportHashEntry {
be_uint32_t u;
inline uint16_t chain_count() const {
return (this->u >> 18) & 0x3FFF;
}
inline uint16_t start_index() const {
return this->u & 0x3FFFF;
}
} __attribute__((packed));
struct PEFFLoaderExportHashKey {
be_uint16_t symbol_length;
be_uint16_t hash;
} __attribute__((packed));
struct PEFFLoaderExportSymbol {
be_uint32_t type_and_name;
be_uint32_t value; // usually offset from section start
be_uint16_t section_index;
inline uint8_t flags() const {
return (this->type_and_name >> 28) & 0x0F;
}
inline uint8_t type() const {
return (this->type_and_name >> 24) & 0x0F;
}
inline uint32_t name_offset() const {
return this->type_and_name & 0x00FFFFFF;
}
} __attribute__((packed));
class PEFFFile {
public:
explicit PEFFFile(const char* filename);
PEFFFile(const char* filename, const std::string& data);
PEFFFile(const char* filename, const void* data, size_t size);
~PEFFFile() = default;
void print(
FILE* stream,
const std::multimap<uint32_t, std::string>* labels = nullptr,
bool print_hex_view_for_code = false) const;
void load_into(const std::string& lib_name, std::shared_ptr<MemoryContext> mem,
uint32_t base_addr = 0);
struct ExportSymbol {
std::string name;
uint16_t section_index;
uint32_t value;
uint8_t flags;
uint8_t type;
void print(FILE* stream) const;
};
struct ImportSymbol {
std::string lib_name;
std::string name;
uint8_t flags;
uint8_t type;
void print(FILE* stream) const;
};
inline const std::map<std::string, ExportSymbol> exports() const {
return this->export_symbols;
}
inline const std::vector<ImportSymbol> imports() const {
return this->import_symbols;
}
inline const ExportSymbol& main() const {
return this->main_symbol;
}
inline const ExportSymbol& init() const {
return this->init_symbol;
}
inline const ExportSymbol& term() const {
return this->term_symbol;
}
inline bool is_ppc() const {
return this->arch_is_ppc;
}
private:
void parse(const void* data, size_t size);
void parse_loader_section(const void* data, size_t size);
const std::string filename;
struct Section {
std::string name;
uint32_t default_address;
uint32_t total_size;
uint32_t unpacked_size;
uint32_t packed_size;
PEFFSectionKind section_kind;
PEFFShareKind share_kind;
uint8_t alignment;
std::string data;
std::string relocation_program;
};
uint32_t file_timestamp;
uint32_t old_def_version;
uint32_t old_imp_version;
uint32_t current_version;
bool arch_is_ppc;
// If the name is blank for any of these, they aren't exported
ExportSymbol main_symbol;
ExportSymbol init_symbol;
ExportSymbol term_symbol;
std::vector<Section> sections;
std::map<std::string, ExportSymbol> export_symbols;
std::vector<ImportSymbol> import_symbols;
};