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Elf: Renamed modules to be consistent with new loader naming, fixed tabs -> spaces.

This commit is contained in:
bunnei 2014-06-16 23:05:10 -04:00
parent 3577dd027d
commit 1da361c7ab
8 changed files with 343 additions and 373 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
src/core/CMakeLists.txt
View File

@ -1,6 +1,6 @@
set(SRCS core.cpp
core_timing.cpp
loader/elf_reader.cpp
loader/elf.cpp
loader/loader.cpp
loader/ncch.cpp
mem_map.cpp
@ -51,8 +51,7 @@ set(SRCS core.cpp
set(HEADERS core.h
core_timing.h
loader/elf_reader.h
loader/elf_types.h
loader/elf.h
loader/loader.h
loader/ncch.h
mem_map.h

5
src/core/core.vcxproj
View File

@ -181,7 +181,7 @@
<ClCompile Include="hw\gpu.cpp" />
<ClCompile Include="hw\hw.cpp" />
<ClCompile Include="hw\ndma.cpp" />
<ClCompile Include="loader\elf_reader.cpp" />
<ClCompile Include="loader\elf.cpp" />
<ClCompile Include="loader\loader.cpp" />
<ClCompile Include="loader\ncch.cpp" />
<ClCompile Include="mem_map.cpp" />
@ -232,8 +232,7 @@
<ClInclude Include="hw\gpu.h" />
<ClInclude Include="hw\hw.h" />
<ClInclude Include="hw\ndma.h" />
<ClInclude Include="loader\elf_reader.h" />
<ClInclude Include="loader\elf_types.h" />
<ClInclude Include="loader\elf.h" />
<ClInclude Include="loader\loader.h" />
<ClInclude Include="loader\ncch.h" />
<ClInclude Include="mem_map.h" />

15
src/core/core.vcxproj.filters
View File

@ -167,15 +167,15 @@
<ClCompile Include="hle\service\ndm.cpp">
<Filter>hle\service</Filter>
</ClCompile>
<ClCompile Include="loader\elf_reader.cpp">
<Filter>loader</Filter>
</ClCompile>
<ClCompile Include="loader\loader.cpp">
<Filter>loader</Filter>
</ClCompile>
<ClCompile Include="loader\ncch.cpp">
<Filter>loader</Filter>
</ClCompile>
<ClCompile Include="loader\elf.cpp">
<Filter>loader</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<ClInclude Include="arm\disassembler\arm_disasm.h">
@ -305,18 +305,15 @@
<ClInclude Include="hle\service\ndm.h">
<Filter>hle\service</Filter>
</ClInclude>
<ClInclude Include="loader\elf_reader.h">
<Filter>loader</Filter>
</ClInclude>
<ClInclude Include="loader\elf_types.h">
<Filter>loader</Filter>
</ClInclude>
<ClInclude Include="loader\loader.h">
<Filter>loader</Filter>
</ClInclude>
<ClInclude Include="loader\ncch.h">
<Filter>loader</Filter>
</ClInclude>
<ClInclude Include="loader\elf.h">
<Filter>loader</Filter>
</ClInclude>
</ItemGroup>
<ItemGroup>
<Text Include="CMakeLists.txt" />

190
src/core/loader/elf.cpp Normal file
View File

@ -0,0 +1,190 @@
// 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.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;
}

102
src/core/loader/elf_types.h → src/core/loader/elf.h
View File

@ -1,14 +1,15 @@
// Copyright 2013 Dolphin Emulator Project
// Copyright 2013 Dolphin Emulator Project / Citra Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#pragma once
#include "common/common.h"
// ELF Header Constants
// File type
enum ElfType
{
enum ElfType {
ET_NONE = 0,
ET_REL = 1,
ET_EXEC = 2,
@ -19,8 +20,7 @@ enum ElfType
};
// Machine/Architecture
enum ElfMachine
{
enum ElfMachine {
EM_NONE = 0,
EM_M32 = 1,
EM_SPARC = 2,
@ -62,8 +62,6 @@ enum ElfMachine
#define ELFDATA2LSB 1
#define ELFDATA2MSB 2
// Sections constants
// Section indexes
@ -96,7 +94,6 @@ enum ElfMachine
// Custom section types
#define SHT_PSPREL 0x700000a0
// Section flags
enum ElfSectionFlags
{
@ -188,10 +185,8 @@ typedef unsigned int Elf32_Off;
typedef signed int Elf32_Sword;
typedef unsigned int Elf32_Word;
// ELF file header
struct Elf32_Ehdr
{
struct Elf32_Ehdr {
unsigned char e_ident[EI_NIDENT];
Elf32_Half e_type;
Elf32_Half e_machine;
@ -209,8 +204,7 @@ struct Elf32_Ehdr
};
// Section header
struct Elf32_Shdr
{
struct Elf32_Shdr {
Elf32_Word sh_name;
Elf32_Word sh_type;
Elf32_Word sh_flags;
@ -224,8 +218,7 @@ struct Elf32_Shdr
};
// Segment header
struct Elf32_Phdr
{
struct Elf32_Phdr {
Elf32_Word p_type;
Elf32_Off p_offset;
Elf32_Addr p_vaddr;
@ -237,8 +230,7 @@ struct Elf32_Phdr
};
// Symbol table entry
struct Elf32_Sym
{
struct Elf32_Sym {
Elf32_Word st_name;
Elf32_Addr st_value;
Elf32_Word st_size;
@ -252,14 +244,12 @@ struct Elf32_Sym
#define ELF32_ST_INFO(b,t) (((b)<<4)+((t)&0xf))
// Relocation entries
struct Elf32_Rel
{
struct Elf32_Rel {
Elf32_Addr r_offset;
Elf32_Word r_info;
};
struct Elf32_Rela
{
struct Elf32_Rela {
Elf32_Addr r_offset;
Elf32_Word r_info;
Elf32_Sword r_addend;
@ -269,13 +259,73 @@ struct Elf32_Rela
#define ELF32_R_TYPE(i) ((unsigned char)(i))
#define ELF32_R_INFO(s,t) (((s)<<8 )+(unsigned char)(t))
struct Elf32_Dyn
{
struct Elf32_Dyn {
Elf32_Sword d_tag;
union
{
union {
Elf32_Word d_val;
Elf32_Addr d_ptr;
} d_un;
};
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;
}
};

190
src/core/loader/elf_reader.cpp
View File

@ -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;
}

75
src/core/loader/elf_reader.h
View File

@ -1,75 +0,0 @@
// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
#pragma once
#include "core/loader/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;
}
};

2
src/core/loader/loader.cpp
View File

@ -6,7 +6,7 @@
#include "common/file_util.h"
#include "core/loader/loader.h"
#include "core/loader/elf_reader.h"
#include "core/loader/elf.h"
#include "core/loader/ncch.h"
#include "core/system.h"
#include "core/core.h"