Project_CTR/makerom/elf.h

#pragma once

typedef enum elf_errors
{
	NOT_ELF_FILE = -10,
	NOT_CTR_ARM_ELF = -11,
	NON_EXECUTABLE_ELF = -12,
	ELF_SECTION_NOT_FOUND = -13,
	NOT_FIND_TEXT_SEGMENT = -14,
	NOT_FIND_DATA_SEGMENT = -15,
	ELF_SEGMENT_SECTION_SIZE_MISMATCH = -16,
	ELF_SEGMENTS_NOT_CONTINUOUS = -17,
	ELF_SEGMENTS_NOT_FOUND = -18,
} elf_errors;

typedef enum elf_section_type
{
	SHT_NULL,
	SHT_PROGBITS,
	SHT_SYMTAB,
	SHT_STRTAB,
	SHT_RELA,
	SHT_HASH,
	SHT_DYNAMIC,
	SHT_NOTE,
	SHT_NOBITS,
	SHT_REL,
	SHT_SHLIB,
	SHT_DYNSYM,
	SHT_UNKNOWN12,
	SHT_UNKNOWN13,
	SHT_INIT_ARRAY,
	SHT_FINI_ARRAY,
	SHT_PREINIT_ARRAY,
	SHT_GROUP,
	SHT_SYMTAB_SHNDX,
	SHT_NUM,
	SHT_ARM_EXIDX = 0x70000001,
	SHT_ARM_PREEMPTMAP,
	SHT_ARM_ATTRIBUTES,
	SHT_ARM_DEBUGOVERLAY,
	SHT_ARM_OVERLAYSECTION
} elf_section_type;

typedef enum elf_section_flag
{
	SHF_WRITE = 0x1,
	SHF_ALLOC = 0x2,
	SHF_EXECINSTR = 0x4,
	SHF_MERGE = 0x10,
	SHF_STRINGS = 0x20,
	SHF_INFO_LINK = 0x40,
	SHF_LINK_ORDER = 0x80,
	SHF_OS_NONCONFORMING = 0x100,
	SHF_GROUP = 0x200,
	SHF_TLS = 0x400
} elf_section_flag;

typedef struct elf_section_entry
{
	const char *name;
	u32 type;
	u32 flags;
	const u8 *ptr;
	u32 offsetInFile;
	u32 size;
	u32 address;
	u32 alignment;
} elf_section_entry;

typedef enum elf_program_type
{
	PT_NULL,
	PT_LOAD,
	PT_DYNAMIC,
	PT_INTERP,
	PT_NOTE,
	PT_SHLIB,
	PT_PHDR,
} elf_program_type;

typedef enum elf_program_flag
{
	PF_X = 0x1,
	PF_W = 0x2,
	PF_R = 0x4,
	PF_CTRSDK = 0x80000000,

	PF_TEXT = (PF_R|PF_X),
	PF_DATA = (PF_R|PF_W),
	PF_RODATA = PF_R
} elf_program_flag;

typedef struct elf_program_entry
{
	u32 type;
	u32 flags;
	const u8 *ptr;
	u32 offsetInFile;
	u32 sizeInFile;
	u32 virtualAddress;
	u32 physicalAddress;
	u32 sizeInMemory;
	u32 alignment;
} elf_program_entry;

typedef struct elf_segment
{
	const char *name;
	u32 vAddr;

	elf_program_entry *header;
	u32 sectionNum;
	u32 sectionNumMax;
	elf_section_entry *sections;
} elf_segment;

typedef struct elf_context
{
	const u8 *file;

	u32 pageSize;
		
	u32 programTableOffset;
	u16 programTableEntrySize;
	u16 programTableEntryCount;
	
	u32 sectionTableOffset;
	u16 sectionTableEntrySize;
	u16 sectionTableEntryCount;
	
	u16 sectionHeaderNameEntryIndex;

	elf_section_entry *sections;
	elf_program_entry *programHeaders;

	u16 activeSegments;
	elf_segment *segments;
} elf_context;

bool IsBss(elf_section_entry *section);
bool IsData(elf_section_entry *section);
bool IsRoData(elf_section_entry *section);
bool IsText(elf_section_entry *section);

int GetElfContext(elf_context *elf, const u8 *elfFile);
void FreeElfContext(elf_context *elf);