diff options
Diffstat (limited to 'src/core/loader/elf_reader.cpp')
| -rw-r--r-- | src/core/loader/elf_reader.cpp | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/src/core/loader/elf_reader.cpp b/src/core/loader/elf_reader.cpp deleted file mode 100644 index 123747f8..00000000 --- a/src/core/loader/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/loader/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; -} |