diff options
Diffstat (limited to 'src/core/elf')
-rw-r--r-- | src/core/elf/elf_reader.cpp | 190 | ||||
-rw-r--r-- | src/core/elf/elf_reader.h | 75 | ||||
-rw-r--r-- | src/core/elf/elf_types.h | 281 |
3 files changed, 0 insertions, 546 deletions
diff --git a/src/core/elf/elf_reader.cpp b/src/core/elf/elf_reader.cpp deleted file mode 100644 index c62332cec..000000000 --- a/src/core/elf/elf_reader.cpp +++ /dev/null @@ -1,190 +0,0 @@ -// Copyright 2013 Dolphin Emulator Project -// Licensed under GPLv2 -// Refer to the license.txt file included. - -#include <string> - -#include "common/common.h" - -#include "common/symbols.h" -#include "core/mem_map.h" -#include "core/elf/elf_reader.h" - -//void bswap(Elf32_Word &w) {w = Common::swap32(w);} -//void bswap(Elf32_Half &w) {w = Common::swap16(w);} - -#define bswap(w) w // Dirty bswap disable for now... 3DS is little endian, anyway - -static void byteswapHeader(Elf32_Ehdr &ELF_H) -{ - bswap(ELF_H.e_type); - bswap(ELF_H.e_machine); - bswap(ELF_H.e_ehsize); - bswap(ELF_H.e_phentsize); - bswap(ELF_H.e_phnum); - bswap(ELF_H.e_shentsize); - bswap(ELF_H.e_shnum); - bswap(ELF_H.e_shstrndx); - bswap(ELF_H.e_version); - bswap(ELF_H.e_entry); - bswap(ELF_H.e_phoff); - bswap(ELF_H.e_shoff); - bswap(ELF_H.e_flags); -} - -static void byteswapSegment(Elf32_Phdr &sec) -{ - bswap(sec.p_align); - bswap(sec.p_filesz); - bswap(sec.p_flags); - bswap(sec.p_memsz); - bswap(sec.p_offset); - bswap(sec.p_paddr); - bswap(sec.p_vaddr); - bswap(sec.p_type); -} - -static void byteswapSection(Elf32_Shdr &sec) -{ - bswap(sec.sh_addr); - bswap(sec.sh_addralign); - bswap(sec.sh_entsize); - bswap(sec.sh_flags); - bswap(sec.sh_info); - bswap(sec.sh_link); - bswap(sec.sh_name); - bswap(sec.sh_offset); - bswap(sec.sh_size); - bswap(sec.sh_type); -} - -ElfReader::ElfReader(void *ptr) -{ - base = (char*)ptr; - base32 = (u32 *)ptr; - header = (Elf32_Ehdr*)ptr; - byteswapHeader(*header); - - segments = (Elf32_Phdr *)(base + header->e_phoff); - sections = (Elf32_Shdr *)(base + header->e_shoff); - - entryPoint = header->e_entry; - - LoadSymbols(); -} - -const char *ElfReader::GetSectionName(int section) const -{ - if (sections[section].sh_type == SHT_NULL) - return nullptr; - - int nameOffset = sections[section].sh_name; - char *ptr = (char*)GetSectionDataPtr(header->e_shstrndx); - - if (ptr) - return ptr + nameOffset; - else - return nullptr; -} - -bool ElfReader::LoadInto(u32 vaddr) -{ - DEBUG_LOG(MASTER_LOG,"String section: %i", header->e_shstrndx); - - // Should we relocate? - bRelocate = (header->e_type != ET_EXEC); - - if (bRelocate) - { - DEBUG_LOG(MASTER_LOG,"Relocatable module"); - entryPoint += vaddr; - } - else - { - DEBUG_LOG(MASTER_LOG,"Prerelocated executable"); - } - - INFO_LOG(MASTER_LOG,"%i segments:", header->e_phnum); - - // First pass : Get the bits into RAM - u32 segmentVAddr[32]; - - u32 baseAddress = bRelocate?vaddr:0; - - for (int i = 0; i < header->e_phnum; i++) - { - Elf32_Phdr *p = segments + i; - - INFO_LOG(MASTER_LOG, "Type: %i Vaddr: %08x Filesz: %i Memsz: %i ", p->p_type, p->p_vaddr, p->p_filesz, p->p_memsz); - - if (p->p_type == PT_LOAD) - { - segmentVAddr[i] = baseAddress + p->p_vaddr; - u32 writeAddr = segmentVAddr[i]; - - const u8 *src = GetSegmentPtr(i); - u8 *dst = Memory::GetPointer(writeAddr); - u32 srcSize = p->p_filesz; - u32 dstSize = p->p_memsz; - u32 *s = (u32*)src; - u32 *d = (u32*)dst; - for (int j = 0; j < (int)(srcSize + 3) / 4; j++) - { - *d++ = /*_byteswap_ulong*/(*s++); - } - if (srcSize < dstSize) - { - //memset(dst + srcSize, 0, dstSize-srcSize); //zero out bss - } - INFO_LOG(MASTER_LOG,"Loadable Segment Copied to %08x, size %08x", writeAddr, p->p_memsz); - } - } - - - INFO_LOG(MASTER_LOG,"Done loading."); - return true; -} - -SectionID ElfReader::GetSectionByName(const char *name, int firstSection) const -{ - for (int i = firstSection; i < header->e_shnum; i++) - { - const char *secname = GetSectionName(i); - - if (secname != nullptr && strcmp(name, secname) == 0) - return i; - } - return -1; -} - -bool ElfReader::LoadSymbols() -{ - bool hasSymbols = false; - SectionID sec = GetSectionByName(".symtab"); - if (sec != -1) - { - int stringSection = sections[sec].sh_link; - const char *stringBase = (const char *)GetSectionDataPtr(stringSection); - - //We have a symbol table! - Elf32_Sym *symtab = (Elf32_Sym *)(GetSectionDataPtr(sec)); - int numSymbols = sections[sec].sh_size / sizeof(Elf32_Sym); - for (int sym = 0; sym < numSymbols; sym++) - { - int size = symtab[sym].st_size; - if (size == 0) - continue; - - // int bind = symtab[sym].st_info >> 4; - int type = symtab[sym].st_info & 0xF; - - const char *name = stringBase + symtab[sym].st_name; - - Symbols::Add(symtab[sym].st_value, name, size, type); - - hasSymbols = true; - } - } - - return hasSymbols; -} diff --git a/src/core/elf/elf_reader.h b/src/core/elf/elf_reader.h deleted file mode 100644 index 3e2869f87..000000000 --- a/src/core/elf/elf_reader.h +++ /dev/null @@ -1,75 +0,0 @@ -// Copyright 2013 Dolphin Emulator Project -// Licensed under GPLv2 -// Refer to the license.txt file included. - -#pragma once - -#include "core/elf/elf_types.h" - -enum KnownElfTypes -{ - KNOWNELF_PSP = 0, - KNOWNELF_DS = 1, - KNOWNELF_GBA = 2, - KNOWNELF_GC = 3, -}; - -typedef int SectionID; - -class ElfReader -{ -private: - char *base; - u32 *base32; - - Elf32_Ehdr *header; - Elf32_Phdr *segments; - Elf32_Shdr *sections; - - u32 *sectionAddrs; - bool bRelocate; - u32 entryPoint; - -public: - ElfReader(void *ptr); - ~ElfReader() { } - - u32 Read32(int off) const { return base32[off>>2]; } - - // Quick accessors - ElfType GetType() const { return (ElfType)(header->e_type); } - ElfMachine GetMachine() const { return (ElfMachine)(header->e_machine); } - u32 GetEntryPoint() const { return entryPoint; } - u32 GetFlags() const { return (u32)(header->e_flags); } - bool LoadInto(u32 vaddr); - bool LoadSymbols(); - - int GetNumSegments() const { return (int)(header->e_phnum); } - int GetNumSections() const { return (int)(header->e_shnum); } - const u8 *GetPtr(int offset) const { return (u8*)base + offset; } - const char *GetSectionName(int section) const; - const u8 *GetSectionDataPtr(int section) const - { - if (section < 0 || section >= header->e_shnum) - return nullptr; - if (sections[section].sh_type != SHT_NOBITS) - return GetPtr(sections[section].sh_offset); - else - return nullptr; - } - bool IsCodeSection(int section) const - { - return sections[section].sh_type == SHT_PROGBITS; - } - const u8 *GetSegmentPtr(int segment) - { - return GetPtr(segments[segment].p_offset); - } - u32 GetSectionAddr(SectionID section) const { return sectionAddrs[section]; } - int GetSectionSize(SectionID section) const { return sections[section].sh_size; } - SectionID GetSectionByName(const char *name, int firstSection = 0) const; //-1 for not found - - bool DidRelocate() { - return bRelocate; - } -}; diff --git a/src/core/elf/elf_types.h b/src/core/elf/elf_types.h deleted file mode 100644 index f1bf3db72..000000000 --- a/src/core/elf/elf_types.h +++ /dev/null @@ -1,281 +0,0 @@ -// Copyright 2013 Dolphin Emulator Project -// Licensed under GPLv2 -// Refer to the license.txt file included. - -#pragma once - -// ELF Header Constants - -// File type -enum ElfType -{ - ET_NONE = 0, - ET_REL = 1, - ET_EXEC = 2, - ET_DYN = 3, - ET_CORE = 4, - ET_LOPROC = 0xFF00, - ET_HIPROC = 0xFFFF, -}; - -// Machine/Architecture -enum ElfMachine -{ - EM_NONE = 0, - EM_M32 = 1, - EM_SPARC = 2, - EM_386 = 3, - EM_68K = 4, - EM_88K = 5, - EM_860 = 7, - EM_MIPS = 8 -}; - -// File version -#define EV_NONE 0 -#define EV_CURRENT 1 - -// Identification index -#define EI_MAG0 0 -#define EI_MAG1 1 -#define EI_MAG2 2 -#define EI_MAG3 3 -#define EI_CLASS 4 -#define EI_DATA 5 -#define EI_VERSION 6 -#define EI_PAD 7 -#define EI_NIDENT 16 - -// Magic number -#define ELFMAG0 0x7F -#define ELFMAG1 'E' -#define ELFMAG2 'L' -#define ELFMAG3 'F' - -// File class -#define ELFCLASSNONE 0 -#define ELFCLASS32 1 -#define ELFCLASS64 2 - -// Encoding -#define ELFDATANONE 0 -#define ELFDATA2LSB 1 -#define ELFDATA2MSB 2 - - - -// Sections constants - -// Section indexes -#define SHN_UNDEF 0 -#define SHN_LORESERVE 0xFF00 -#define SHN_LOPROC 0xFF00 -#define SHN_HIPROC 0xFF1F -#define SHN_ABS 0xFFF1 -#define SHN_COMMON 0xFFF2 -#define SHN_HIRESERVE 0xFFFF - -// Section types -#define SHT_NULL 0 -#define SHT_PROGBITS 1 -#define SHT_SYMTAB 2 -#define SHT_STRTAB 3 -#define SHT_RELA 4 -#define SHT_HASH 5 -#define SHT_DYNAMIC 6 -#define SHT_NOTE 7 -#define SHT_NOBITS 8 -#define SHT_REL 9 -#define SHT_SHLIB 10 -#define SHT_DYNSYM 11 -#define SHT_LOPROC 0x70000000 -#define SHT_HIPROC 0x7FFFFFFF -#define SHT_LOUSER 0x80000000 -#define SHT_HIUSER 0xFFFFFFFF - -// Custom section types -#define SHT_PSPREL 0x700000a0 - - -// Section flags -enum ElfSectionFlags -{ - SHF_WRITE = 0x1, - SHF_ALLOC = 0x2, - SHF_EXECINSTR = 0x4, - SHF_MASKPROC = 0xF0000000, -}; - -// Symbol binding -#define STB_LOCAL 0 -#define STB_GLOBAL 1 -#define STB_WEAK 2 -#define STB_LOPROC 13 -#define STB_HIPROC 15 - -// Symbol types -#define STT_NOTYPE 0 -#define STT_OBJECT 1 -#define STT_FUNC 2 -#define STT_SECTION 3 -#define STT_FILE 4 -#define STT_LOPROC 13 -#define STT_HIPROC 15 - -// Undefined name -#define STN_UNDEF 0 - -// Relocation types -#define R_386_NONE 0 -#define R_386_32 1 -#define R_386_PC32 2 -#define R_386_GOT32 3 -#define R_386_PLT32 4 -#define R_386_COPY 5 -#define R_386_GLOB_DAT 6 -#define R_386_JMP_SLOT 7 -#define R_386_RELATIVE 8 -#define R_386_GOTOFF 9 -#define R_386_GOTPC 10 - -// Segment types -#define PT_NULL 0 -#define PT_LOAD 1 -#define PT_DYNAMIC 2 -#define PT_INTERP 3 -#define PT_NOTE 4 -#define PT_SHLIB 5 -#define PT_PHDR 6 -#define PT_LOPROC 0x70000000 -#define PT_HIPROC 0x7FFFFFFF - -// Segment flags -#define PF_X 1 -#define PF_W 2 -#define PF_R 4 - -// Dynamic Array Tags -#define DT_NULL 0 -#define DT_NEEDED 1 -#define DT_PLTRELSZ 2 -#define DT_PLTGOT 3 -#define DT_HASH 4 -#define DT_STRTAB 5 -#define DT_SYMTAB 6 -#define DT_RELA 7 -#define DT_RELASZ 8 -#define DT_RELAENT 9 -#define DT_STRSZ 10 -#define DT_SYMENT 11 -#define DT_INIT 12 -#define DT_FINI 13 -#define DT_SONAME 14 -#define DT_RPATH 15 -#define DT_SYMBOLIC 16 -#define DT_REL 17 -#define DT_RELSZ 18 -#define DT_RELENT 19 -#define DT_PLTREL 20 -#define DT_DEBUG 21 -#define DT_TEXTREL 22 -#define DT_JMPREL 23 -#define DT_LOPROC 0x70000000 -#define DT_HIPROC 0x7FFFFFFF - -typedef unsigned int Elf32_Addr; -typedef unsigned short Elf32_Half; -typedef unsigned int Elf32_Off; -typedef signed int Elf32_Sword; -typedef unsigned int Elf32_Word; - - -// ELF file header -struct Elf32_Ehdr -{ - unsigned char e_ident[EI_NIDENT]; - Elf32_Half e_type; - Elf32_Half e_machine; - Elf32_Word e_version; - Elf32_Addr e_entry; - Elf32_Off e_phoff; - Elf32_Off e_shoff; - Elf32_Word e_flags; - Elf32_Half e_ehsize; - Elf32_Half e_phentsize; - Elf32_Half e_phnum; - Elf32_Half e_shentsize; - Elf32_Half e_shnum; - Elf32_Half e_shstrndx; -}; - -// Section header -struct Elf32_Shdr -{ - Elf32_Word sh_name; - Elf32_Word sh_type; - Elf32_Word sh_flags; - Elf32_Addr sh_addr; - Elf32_Off sh_offset; - Elf32_Word sh_size; - Elf32_Word sh_link; - Elf32_Word sh_info; - Elf32_Word sh_addralign; - Elf32_Word sh_entsize; -}; - -// Segment header -struct Elf32_Phdr -{ - Elf32_Word p_type; - Elf32_Off p_offset; - Elf32_Addr p_vaddr; - Elf32_Addr p_paddr; - Elf32_Word p_filesz; - Elf32_Word p_memsz; - Elf32_Word p_flags; - Elf32_Word p_align; -}; - -// Symbol table entry -struct Elf32_Sym -{ - Elf32_Word st_name; - Elf32_Addr st_value; - Elf32_Word st_size; - unsigned char st_info; - unsigned char st_other; - Elf32_Half st_shndx; -}; - -#define ELF32_ST_BIND(i) ((i)>>4) -#define ELF32_ST_TYPE(i) ((i)&0xf) -#define ELF32_ST_INFO(b,t) (((b)<<4)+((t)&0xf)) - -// Relocation entries -struct Elf32_Rel -{ - Elf32_Addr r_offset; - Elf32_Word r_info; -}; - -struct Elf32_Rela -{ - Elf32_Addr r_offset; - Elf32_Word r_info; - Elf32_Sword r_addend; -}; - -#define ELF32_R_SYM(i) ((i)>>8) -#define ELF32_R_TYPE(i) ((unsigned char)(i)) -#define ELF32_R_INFO(s,t) (((s)<<8 )+(unsigned char)(t)) - - -struct Elf32_Dyn -{ - Elf32_Sword d_tag; - union - { - Elf32_Word d_val; - Elf32_Addr d_ptr; - } d_un; -}; |