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https://github.com/RGBCube/serenity
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Kernel: Move ELF-related files into Kernel/ELF/.
This commit is contained in:
Andreas Kling
parent
9fca94269e
commit
072ea7eece
7 changed files with 5 additions and 5 deletions
226
Kernel/ELF/ELFImage.h
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226
Kernel/ELF/ELFImage.h
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#pragma once
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#include <AK/OwnPtr.h>
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#include <AK/HashMap.h>
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#include <AK/AKString.h>
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#include <Kernel/ELF/exec_elf.h>
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#include <Kernel/types.h>
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class ELFImage {
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public:
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explicit ELFImage(const byte*);
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~ELFImage();
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void dump();
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bool is_valid() const { return m_valid; }
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bool parse();
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class Section;
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class RelocationSection;
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class Symbol;
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class Relocation;
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class Symbol {
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public:
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Symbol(const ELFImage& image, unsigned index, const Elf32_Sym& sym)
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: m_image(image)
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, m_sym(sym)
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, m_index(index)
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{
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}
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~Symbol() { }
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const char* name() const { return m_image.table_string(m_sym.st_name); }
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unsigned section_index() const { return m_sym.st_shndx; }
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unsigned value() const { return m_sym.st_value; }
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unsigned size() const { return m_sym.st_size; }
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unsigned index() const { return m_index; }
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unsigned type() const { return ELF32_ST_TYPE(m_sym.st_info); }
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const Section section() const { return m_image.section(section_index()); }
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private:
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const ELFImage& m_image;
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const Elf32_Sym& m_sym;
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const unsigned m_index;
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};
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class ProgramHeader {
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public:
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ProgramHeader(const ELFImage& image, unsigned program_header_index)
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: m_image(image)
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, m_program_header(image.program_header_internal(program_header_index))
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, m_program_header_index(program_header_index)
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{
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}
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~ProgramHeader() { }
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unsigned index() const { return m_program_header_index; }
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dword type() const { return m_program_header.p_type; }
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dword flags() const { return m_program_header.p_flags; }
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dword offset() const { return m_program_header.p_offset; }
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LinearAddress laddr() const { return LinearAddress(m_program_header.p_vaddr); }
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dword size_in_memory() const { return m_program_header.p_memsz; }
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dword size_in_image() const { return m_program_header.p_filesz; }
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dword alignment() const { return m_program_header.p_align; }
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bool is_readable() const { return flags() & PF_R; }
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bool is_writable() const { return flags() & PF_W; }
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bool is_executable() const { return flags() & PF_X; }
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const char* raw_data() const { return m_image.raw_data(m_program_header.p_offset); }
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private:
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const ELFImage& m_image;
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const Elf32_Phdr& m_program_header;
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unsigned m_program_header_index { 0 };
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};
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class Section {
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public:
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Section(const ELFImage& image, unsigned sectionIndex)
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: m_image(image)
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, m_section_header(image.section_header(sectionIndex))
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, m_section_index(sectionIndex)
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{
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}
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~Section() { }
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const char* name() const { return m_image.section_header_table_string(m_section_header.sh_name); }
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unsigned type() const { return m_section_header.sh_type; }
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unsigned offset() const { return m_section_header.sh_offset; }
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unsigned size() const { return m_section_header.sh_size; }
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unsigned entry_size() const { return m_section_header.sh_entsize; }
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unsigned entry_count() const { return size() / entry_size(); }
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dword address() const { return m_section_header.sh_addr; }
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const char* raw_data() const { return m_image.raw_data(m_section_header.sh_offset); }
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bool is_undefined() const { return m_section_index == SHN_UNDEF; }
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#ifdef SUPPORT_RELOCATIONS
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const RelocationSection relocations() const;
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#endif
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dword flags() const { return m_section_header.sh_flags; }
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bool is_writable() const { return flags() & SHF_WRITE; }
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bool is_executable() const { return flags() & PF_X; }
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protected:
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friend class RelocationSection;
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const ELFImage& m_image;
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const Elf32_Shdr& m_section_header;
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unsigned m_section_index;
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};
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#ifdef SUPPORT_RELOCATIONS
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class RelocationSection : public Section {
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public:
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RelocationSection(const Section& section)
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: Section(section.m_image, section.m_section_index)
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{
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}
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unsigned relocation_count() const { return entry_count(); }
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const Relocation relocation(unsigned index) const;
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template<typename F> void for_each_relocation(F) const;
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};
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class Relocation {
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public:
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Relocation(const ELFImage& image, const Elf32_Rel& rel)
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: m_image(image)
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, m_rel(rel)
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{
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}
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~Relocation() { }
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unsigned offset() const { return m_rel.r_offset; }
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unsigned type() const { return ELF32_R_TYPE(m_rel.r_info); }
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unsigned symbol_index() const { return ELF32_R_SYM(m_rel.r_info); }
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const Symbol symbol() const { return m_image.symbol(symbol_index()); }
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private:
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const ELFImage& m_image;
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const Elf32_Rel& m_rel;
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};
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#endif
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unsigned symbol_count() const;
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unsigned section_count() const;
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unsigned program_header_count() const;
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const Symbol symbol(unsigned) const;
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const Section section(unsigned) const;
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const ProgramHeader program_header(unsigned const) const;
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template<typename F> void for_each_section(F) const;
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template<typename F> void for_each_section_of_type(unsigned, F) const;
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template<typename F> void for_each_symbol(F) const;
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template<typename F> void for_each_program_header(F) const;
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// NOTE: Returns section(0) if section with name is not found.
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// FIXME: I don't love this API.
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const Section lookup_section(const char* name) const;
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bool is_executable() const { return header().e_type == ET_EXEC; }
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bool is_relocatable() const { return header().e_type == ET_REL; }
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LinearAddress entry() const { return LinearAddress(header().e_entry); }
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private:
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bool parse_header();
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const char* raw_data(unsigned offset) const;
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const Elf32_Ehdr& header() const;
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const Elf32_Shdr& section_header(unsigned) const;
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const Elf32_Phdr& program_header_internal(unsigned) const;
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const char* table_string(unsigned offset) const;
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const char* section_header_table_string(unsigned offset) const;
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const char* section_index_to_string(unsigned index);
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const byte* m_buffer { nullptr };
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#ifdef SUPPORT_RELOCATIONS
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HashMap<String, unsigned> m_sections;
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#endif
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bool m_valid { false };
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unsigned m_symbol_table_section_index { 0 };
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unsigned m_string_table_section_index { 0 };
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};
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template<typename F>
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inline void ELFImage::for_each_section(F func) const
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{
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for (unsigned i = 0; i < section_count(); ++i)
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func(section(i));
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}
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template<typename F>
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inline void ELFImage::for_each_section_of_type(unsigned type, F func) const
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{
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for (unsigned i = 0; i < section_count(); ++i) {
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auto& section = this->section(i);
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if (section.type() == type) {
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if (!func(section))
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break;
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}
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}
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}
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#ifdef SUPPORT_RELOCATIONS
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template<typename F>
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inline void ELFImage::RelocationSection::for_each_relocation(F func) const
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{
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for (unsigned i = 0; i < relocation_count(); ++i) {
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if (!func(relocation(i)))
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break;
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}
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}
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#endif
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template<typename F>
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inline void ELFImage::for_each_symbol(F func) const
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{
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for (unsigned i = 0; i < symbol_count(); ++i) {
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if (!func(symbol(i)))
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break;
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}
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}
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template<typename F>
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inline void ELFImage::for_each_program_header(F func) const
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{
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for (unsigned i = 0; i < program_header_count(); ++i)
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func(program_header(i));
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}
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