mirror of
https://github.com/rui314/mold.git
synced 2024-12-29 11:24:36 +03:00
92 lines
2.2 KiB
C++
92 lines
2.2 KiB
C++
#include "mold.h"
|
|
|
|
using namespace llvm::ELF;
|
|
|
|
std::atomic_int num_relocs;
|
|
|
|
InputSection::InputSection(ObjectFile *file, const ELF64LE::Shdr *hdr, StringRef name)
|
|
: file(file), hdr(hdr) {
|
|
this->name = name;
|
|
this->output_section = OutputSection::get_instance(this);
|
|
|
|
uint64_t align = (hdr->sh_addralign == 0) ? 1 : hdr->sh_addralign;
|
|
if (align > UINT32_MAX)
|
|
error(toString(file) + ": section sh_addralign is too large");
|
|
if (__builtin_popcount(align) != 1)
|
|
error(toString(file) + ": section sh_addralign is not a power of two");
|
|
this->alignment = align;
|
|
}
|
|
|
|
uint64_t InputSection::get_size() const {
|
|
return hdr->sh_size;
|
|
}
|
|
|
|
void InputSection::copy_to(uint8_t *buf) {
|
|
if (hdr->sh_type == SHT_NOBITS || hdr->sh_size == 0)
|
|
return;
|
|
ArrayRef<uint8_t> data = check(file->obj.getSectionContents(*hdr));
|
|
memcpy(buf + offset, &data[0], data.size());
|
|
}
|
|
|
|
void InputSection::relocate(uint8_t *buf) {
|
|
if (rels.empty())
|
|
return;
|
|
|
|
int i = 0;
|
|
for (const ELF64LE::Rela &rel : rels) {
|
|
uint8_t *loc = buf + offset + rel.r_offset;
|
|
uint64_t val = 5;
|
|
|
|
switch (rel.getType(false)) {
|
|
case R_X86_64_8:
|
|
*loc = val;
|
|
break;
|
|
case R_X86_64_PC8:
|
|
*loc = val;
|
|
break;
|
|
case R_X86_64_16:
|
|
*(uint16_t *)loc = val;
|
|
break;
|
|
case R_X86_64_PC16:
|
|
*(uint16_t *)loc = val;
|
|
break;
|
|
case R_X86_64_32:
|
|
*(uint32_t *)loc = val;
|
|
break;
|
|
case R_X86_64_32S:
|
|
case R_X86_64_TPOFF32:
|
|
case R_X86_64_GOT32:
|
|
case R_X86_64_GOTPC32:
|
|
case R_X86_64_GOTPC32_TLSDESC:
|
|
case R_X86_64_GOTPCREL:
|
|
case R_X86_64_GOTPCRELX:
|
|
case R_X86_64_REX_GOTPCRELX:
|
|
case R_X86_64_PC32:
|
|
case R_X86_64_GOTTPOFF:
|
|
case R_X86_64_PLT32:
|
|
case R_X86_64_TLSGD:
|
|
case R_X86_64_TLSLD:
|
|
case R_X86_64_DTPOFF32:
|
|
case R_X86_64_SIZE32:
|
|
*(uint32_t *)loc = val;
|
|
break;
|
|
case R_X86_64_64:
|
|
case R_X86_64_DTPOFF64:
|
|
case R_X86_64_PC64:
|
|
case R_X86_64_SIZE64:
|
|
case R_X86_64_GOT64:
|
|
case R_X86_64_GOTOFF64:
|
|
case R_X86_64_GOTPC64:
|
|
*(uint64_t *)loc = val;
|
|
break;
|
|
default:
|
|
error(toString(this) + ": unknown relocation");
|
|
}
|
|
// num_relocs++;
|
|
}
|
|
}
|
|
|
|
std::string toString(InputSection *isec) {
|
|
return (toString(isec->file) + ":(" + isec->name + ")").str();
|
|
}
|