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Bootloader: installer now uses banan os elf headers intead of Linux's

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Bananymous
2023-11-13 21:30:53 +02:00
parent 2c2ee6636f
commit cbb9422ee0
3 changed files with 24 additions and 19 deletions
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28
bootloader/installer/ELF.cpp
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@@ -1,5 +1,7 @@
#include "ELF.h"
#include <LibELF/Values.h>
#include <cassert>
#include <cerrno>
#include <cstring>
@@ -8,6 +10,8 @@
#include <sys/mman.h>
#include <unistd.h>
using namespace LibELF;
ELFFile::ELFFile(std::string_view path)
: m_path(path)
{
@@ -49,14 +53,14 @@ ELFFile::~ELFFile()
m_fd = -1;
}
const Elf64_Ehdr& ELFFile::elf_header() const
const ElfNativeFileHeader& ELFFile::elf_header() const
{
return *reinterpret_cast<Elf64_Ehdr*>(m_mmap);
return *reinterpret_cast<LibELF::ElfNativeFileHeader*>(m_mmap);
}
bool ELFFile::validate_elf_header() const
{
if (m_stat.st_size < sizeof(Elf64_Ehdr))
if (m_stat.st_size < sizeof(ElfNativeFileHeader))
{
std::cerr << m_path << " is too small to be a ELF executable" << std::endl;
return false;
@@ -75,9 +79,13 @@ bool ELFFile::validate_elf_header() const
return false;
}
#if ARCH(x86_64)
if (elf_header.e_ident[EI_CLASS] != ELFCLASS64)
#elif ARCH(i386)
if (elf_header.e_ident[EI_CLASS] != ELFCLASS32)
#endif
{
std::cerr << m_path << " is not 64 bit ELF" << std::endl;
std::cerr << m_path << " architecture doesn't match" << std::endl;
return false;
}
@@ -99,24 +107,18 @@ bool ELFFile::validate_elf_header() const
return false;
}
if (elf_header.e_machine != EM_X86_64)
{
std::cerr << m_path << " is not an x86_64 ELF file" << std::endl;
return false;
}
return true;
}
const Elf64_Shdr& ELFFile::section_header(std::size_t index) const
const ElfNativeSectionHeader& ELFFile::section_header(std::size_t index) const
{
const auto& elf_header = this->elf_header();
assert(index < elf_header.e_shnum);
const uint8_t* section_array_start = m_mmap + elf_header.e_shoff;
return *reinterpret_cast<const Elf64_Shdr*>(section_array_start + index * elf_header.e_shentsize);
return *reinterpret_cast<const ElfNativeSectionHeader*>(section_array_start + index * elf_header.e_shentsize);
}
std::string_view ELFFile::section_name(const Elf64_Shdr& section_header) const
std::string_view ELFFile::section_name(const ElfNativeSectionHeader& section_header) const
{
const auto& elf_header = this->elf_header();
assert(elf_header.e_shstrndx != SHN_UNDEF);