parsing elf header and improved debug printing
This commit is contained in:
georgemoralis
parent
730f9ecdbb
commit
e37e047c0e
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@ -1,6 +1,11 @@
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#include "Elf.h"
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Elf::~Elf()
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{
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Reset();
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}
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static self_header* load_self(FsFile& f)
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{
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//read self header
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@ -22,11 +27,11 @@ static self_segment_header* load_self_segments(FsFile& f, u16 num)
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static elf_header* load_elf_header(FsFile& f)
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{
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auto* ehdr = new elf_header;
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auto* m_elf_header = new elf_header;
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f.Read(ehdr, sizeof(elf_header));
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f.Read(m_elf_header, sizeof(elf_header));
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return ehdr;
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return m_elf_header;
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}
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static elf_program_header* load_program_header(FsFile& f, u64 offset, u16 num)
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@ -54,8 +59,25 @@ static elf_section_header* load_section_header(FsFile& f, u64 offset, u16 num)
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return shdr;
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}
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void Elf::Reset()//reset all variables
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{
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if (m_f != nullptr)
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{
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m_f->Close();
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delete m_f;
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}
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delete m_self;
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delete m_elf_header;
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delete[] m_self_segments;
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m_self = nullptr;
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m_self_segments = nullptr;
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m_elf_header = nullptr;
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}
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void Elf::Open(const std::string& file_name)
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{
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Reset();//reset all variables
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m_f = new FsFile;
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m_f->Open(file_name, fsOpenMode::fsRead);
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@ -72,6 +94,10 @@ void Elf::Open(const std::string& file_name)
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m_self_segments = load_self_segments(*m_f, m_self->segment_count);
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}
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auto elfheader_pos = m_f->Tell();//get the entry pos for elf file
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m_elf_header = load_elf_header(*m_f);
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DebugDump();
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}
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@ -110,21 +136,21 @@ bool Elf::isSelfFile() const
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void Elf::DebugDump() {
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printf("SELF header:\n");
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printf(" magic ..............: 0x%08X\n", m_self->magic);
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printf(" version .........: %d\n", m_self->version);
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printf(" mode .........: 0x%X\n", m_self->mode);
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printf(" endian .........: %d\n", m_self->endian);
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printf(" attributes .........: 0x%X\n", m_self->attributes);
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printf(" category .........: 0x%X\n", m_self->category);
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printf(" program_type........: 0x%X\n", m_self->program_type);
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printf(" padding1 ...........: 0x%04X\n", m_self->padding1);
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printf(" header size ........: 0x%X\n", m_self->header_size);
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printf(" meta size .....: %u\n", m_self->meta_size);
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printf(" file size ..........: %u\n", m_self->file_size);
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printf(" padding2 ...........: 0x%08X\n", m_self->padding2);
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printf(" segment count ......: %u\n", m_self->segment_count);
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printf(" unknown 1A .........: 0x%04X\n", m_self->unknown1A);
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printf(" padding3 ...........: 0x%04X\n", m_self->padding3);
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printf(" magic ..............: 0x%08" PRIx32 "\n", m_self->magic);
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printf(" version .........: %" PRIu8 "\n", m_self->version);
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printf(" mode .........: 0x%02" PRIx8 "\n", m_self->mode);
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printf(" endian .........: %" PRIu8 "\n", m_self->endian);
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printf(" attributes .........: 0x%02" PRIx8 "\n", m_self->attributes);
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printf(" category .........: 0x%02" PRIx8 "\n", m_self->category);
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printf(" program_type........: 0x%02" PRIx8 "\n", m_self->program_type);
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printf(" padding1 ...........: 0x%04" PRIx16 "\n", m_self->padding1);
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printf(" header size ........: %" PRIu16 "\n", m_self->header_size);
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printf(" meta size .....: %" PRIu16 "\n", m_self->meta_size);
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printf(" file size ..........: %" PRIu32 "\n", m_self->file_size);
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printf(" padding2 ...........: 0x%08" PRIx32 "\n", m_self->padding2);
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printf(" segment count ......: %" PRIu16 "\n", m_self->segment_count);
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printf(" unknown 1A .........: 0x%04" PRIx16 "\n", m_self->unknown1A);
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printf(" padding3 ...........: 0x%04" PRIx16 "\n", m_self->padding3);
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printf("\n");
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printf("SELF segments:\n");
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@ -133,10 +159,33 @@ void Elf::DebugDump() {
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{
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auto segment_header = m_self_segments[i];
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printf(" [%d]\n", i);
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printf(" flags ............: 0x%llx\n", segment_header.flags);
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printf(" file offset ......: 0x%llx\n", segment_header.file_offset);
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printf(" file size ........: %llu\n", segment_header.file_size);
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printf(" memory size ......: %llu\n", segment_header.memory_size);
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printf(" flags ............: 0x%016" PRIx64 "\n", segment_header.flags);
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printf(" file offset ......: 0x%016" PRIx64 "\n", segment_header.file_offset);
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printf(" file size ........: %" PRIu64 "\n", segment_header.file_size);
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printf(" memory size ......: %" PRIu64 "\n", segment_header.memory_size);
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}
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printf("\n");
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printf("Elf header:\n");
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printf(" ident .........: 0x");
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for (auto i : m_elf_header->e_ident)
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{
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printf("%02x", i);
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}
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printf("\n");
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printf(" type .........: 0x%04" PRIx16 "\n", m_elf_header->e_type);
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printf(" machine .......: 0x%04" PRIx16 "\n", m_elf_header->e_machine);
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printf(" version .......: 0x%08" PRIx32 "\n", m_elf_header->e_version);
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printf(" entry .........: 0x%016" PRIx64 "\n", m_elf_header->e_entry);
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printf(" phoff .........: 0x%016" PRIx64 "\n", m_elf_header->e_phoff);
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printf(" shoff .........: 0x%016" PRIx64 "\n", m_elf_header->e_shoff);
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printf(" flags .........: 0x%08" PRIx32 "\n", m_elf_header->e_flags);
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printf(" ehsize ........: 0x%04" PRIx16 "\n", m_elf_header->e_ehsize);
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printf(" phentsize .....: 0x%04" PRIx16 "\n", m_elf_header->e_phentsize);
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printf(" phnum .........: %" PRIu16 "\n", m_elf_header->e_phnum);
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printf(" shentsize .....: 0x%04" PRIx16 "\n", m_elf_header->e_shentsize);
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printf(" shnum .........: %" PRIu16 "\n", m_elf_header->e_shnum);
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printf(" shstrndx ......: %" PRIu16 "\n", m_elf_header->e_shstrndx);
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}
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@ -1,5 +1,6 @@
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#pragma once
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#include <string>
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#include <inttypes.h>
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#include "../types.h"
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#include "../Core/FsFile.h"
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@ -32,6 +33,16 @@ struct self_segment_header
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u64 memory_size;
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};
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constexpr int EI_MAG0 = 0;/* e_ident[] indexes */
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constexpr int EI_MAG2 = 2;
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constexpr int EI_MAG3 = 3;
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constexpr int EI_CLASS = 4;
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constexpr int EI_DATA = 5;
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constexpr int EI_VERSION = 6;
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constexpr int EI_OSABI = 7;
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constexpr int EI_PAD = 8;
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struct elf_header
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{
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u08 e_ident[16]; /* ELF identification */
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@ -79,12 +90,19 @@ struct elf_section_header
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class Elf
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{
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public:
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Elf() = default;
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virtual ~Elf();
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void Open(const std::string & file_name);
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bool isSelfFile() const;
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void DebugDump();
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private:
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void Reset();
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FsFile* m_f = nullptr;
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self_header* m_self = nullptr;
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self_segment_header* m_self_segments = nullptr;
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elf_header* m_elf_header = nullptr;
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};
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