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Diffstat (limited to 'src/core/loader/elf.cpp')
-rw-r--r--src/core/loader/elf.cpp120
1 files changed, 55 insertions, 65 deletions
diff --git a/src/core/loader/elf.cpp b/src/core/loader/elf.cpp
index 3ca60c07..773eaf77 100644
--- a/src/core/loader/elf.cpp
+++ b/src/core/loader/elf.cpp
@@ -18,25 +18,25 @@
// File type
enum ElfType {
- ET_NONE = 0,
- ET_REL = 1,
- ET_EXEC = 2,
- ET_DYN = 3,
- ET_CORE = 4,
+ 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_NONE = 0,
+ EM_M32 = 1,
EM_SPARC = 2,
- EM_386 = 3,
- EM_68K = 4,
- EM_88K = 5,
- EM_860 = 7,
- EM_MIPS = 8
+ EM_386 = 3,
+ EM_68K = 4,
+ EM_88K = 5,
+ EM_860 = 7,
+ EM_MIPS = 8
};
// File version
@@ -54,12 +54,6 @@ enum ElfMachine {
#define EI_PAD 7
#define EI_NIDENT 16
-// Magic number
-#define ELFMAG0 0x7F
-#define ELFMAG1 'E'
-#define ELFMAG2 'L'
-#define ELFMAG3 'F'
-
// Sections constants
// Section types
@@ -83,10 +77,10 @@ enum ElfMachine {
// Section flags
enum ElfSectionFlags
{
- SHF_WRITE = 0x1,
- SHF_ALLOC = 0x2,
+ SHF_WRITE = 0x1,
+ SHF_ALLOC = 0x2,
SHF_EXECINSTR = 0x4,
- SHF_MASKPROC = 0xF0000000,
+ SHF_MASKPROC = 0xF0000000,
};
// Segment types
@@ -100,11 +94,11 @@ enum ElfSectionFlags
#define PT_LOPROC 0x70000000
#define PT_HIPROC 0x7FFFFFFF
-typedef unsigned int Elf32_Addr;
+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;
+typedef unsigned int Elf32_Off;
+typedef signed int Elf32_Sword;
+typedef unsigned int Elf32_Word;
////////////////////////////////////////////////////////////////////////////////////////////////////
// ELF file header
@@ -188,7 +182,6 @@ private:
public:
ElfReader(void *ptr);
- ~ElfReader() { }
u32 Read32(int off) const { return base32[off >> 2]; }
@@ -197,7 +190,7 @@ public:
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);
+ void LoadInto(u32 vaddr);
bool LoadSymbols();
int GetNumSegments() const { return (int)(header->e_phnum); }
@@ -219,7 +212,7 @@ public:
return GetPtr(segments[segment].p_offset);
}
u32 GetSectionAddr(SectionID section) const { return sectionAddrs[section]; }
- int GetSectionSize(SectionID section) const { return sections[section].sh_size; }
+ unsigned 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() const {
@@ -229,11 +222,11 @@ public:
ElfReader::ElfReader(void *ptr) {
base = (char*)ptr;
- base32 = (u32 *)ptr;
+ base32 = (u32*)ptr;
header = (Elf32_Ehdr*)ptr;
- segments = (Elf32_Phdr *)(base + header->e_phoff);
- sections = (Elf32_Shdr *)(base + header->e_shoff);
+ segments = (Elf32_Phdr*)(base + header->e_phoff);
+ sections = (Elf32_Shdr*)(base + header->e_shoff);
entryPoint = header->e_entry;
@@ -245,7 +238,7 @@ const char *ElfReader::GetSectionName(int section) const {
return nullptr;
int name_offset = sections[section].sh_name;
- char *ptr = (char*)GetSectionDataPtr(header->e_shstrndx);
+ const char* ptr = (char*)GetSectionDataPtr(header->e_shstrndx);
if (ptr)
return ptr + name_offset;
@@ -253,7 +246,7 @@ const char *ElfReader::GetSectionName(int section) const {
return nullptr;
}
-bool ElfReader::LoadInto(u32 vaddr) {
+void ElfReader::LoadInto(u32 vaddr) {
LOG_DEBUG(Loader, "String section: %i", header->e_shstrndx);
// Should we relocate?
@@ -271,20 +264,19 @@ bool ElfReader::LoadInto(u32 vaddr) {
u32 segment_addr[32];
u32 base_addr = relocate ? vaddr : 0;
- for (int i = 0; i < header->e_phnum; i++) {
- Elf32_Phdr *p = segments + i;
+ for (unsigned i = 0; i < header->e_phnum; i++) {
+ Elf32_Phdr* p = segments + i;
LOG_DEBUG(Loader, "Type: %i Vaddr: %08x Filesz: %i Memsz: %i ", p->p_type, p->p_vaddr,
- p->p_filesz, p->p_memsz);
+ p->p_filesz, p->p_memsz);
if (p->p_type == PT_LOAD) {
segment_addr[i] = base_addr + p->p_vaddr;
memcpy(Memory::GetPointer(segment_addr[i]), GetSegmentPtr(i), p->p_filesz);
LOG_DEBUG(Loader, "Loadable Segment Copied to %08x, size %08x", segment_addr[i],
- p->p_memsz);
+ p->p_memsz);
}
}
LOG_DEBUG(Loader, "Done loading.");
- return true;
}
SectionID ElfReader::GetSectionByName(const char *name, int firstSection) const {
@@ -305,9 +297,9 @@ bool ElfReader::LoadSymbols() {
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++) {
+ Elf32_Sym* symtab = (Elf32_Sym *)(GetSectionDataPtr(sec));
+ unsigned int numSymbols = sections[sec].sh_size / sizeof(Elf32_Sym);
+ for (unsigned sym = 0; sym < numSymbols; sym++) {
int size = symtab[sym].st_size;
if (size == 0)
continue;
@@ -330,40 +322,38 @@ bool ElfReader::LoadSymbols() {
namespace Loader {
-/// AppLoader_ELF constructor
-AppLoader_ELF::AppLoader_ELF(const std::string& filename) : is_loaded(false) {
- this->filename = filename;
-}
+FileType AppLoader_ELF::IdentifyType(FileUtil::IOFile& file) {
+ u32 magic;
+ file.Seek(0, SEEK_SET);
+ if (1 != file.ReadArray<u32>(&magic, 1))
+ return FileType::Error;
+
+ if (MakeMagic('\x7f', 'E', 'L', 'F') == magic)
+ return FileType::ELF;
-/// AppLoader_NCCH destructor
-AppLoader_ELF::~AppLoader_ELF() {
+ return FileType::Error;
}
-/**
- * Loads an NCCH file (e.g. from a CCI, or the first NCCH in a CXI)
- * @param error_string Pointer to string to put error message if an error has occurred
- * @todo Move NCSD parsing out of here and create a separate function for loading these
- * @return True on success, otherwise false
- */
ResultStatus AppLoader_ELF::Load() {
- LOG_INFO(Loader, "Loading ELF file %s...", filename.c_str());
-
if (is_loaded)
return ResultStatus::ErrorAlreadyLoaded;
- FileUtil::IOFile file(filename, "rb");
+ if (!file->IsOpen())
+ return ResultStatus::Error;
- if (file.IsOpen()) {
- u32 size = (u32)file.GetSize();
- std::unique_ptr<u8[]> buffer(new u8[size]);
- file.ReadBytes(&buffer[0], size);
+ // Reset read pointer in case this file has been read before.
+ file->Seek(0, SEEK_SET);
- ElfReader elf_reader(&buffer[0]);
- elf_reader.LoadInto(0x00100000);
- Kernel::LoadExec(elf_reader.GetEntryPoint());
- } else {
+ u32 size = static_cast<u32>(file->GetSize());
+ std::unique_ptr<u8[]> buffer(new u8[size]);
+ if (file->ReadBytes(&buffer[0], size) != size)
return ResultStatus::Error;
- }
+
+ ElfReader elf_reader(&buffer[0]);
+ elf_reader.LoadInto(0x00100000);
+ Kernel::LoadExec(elf_reader.GetEntryPoint());
+
+ is_loaded = true;
return ResultStatus::Success;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-08 02:39:32 +0000