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This commit is contained in:
Rui Ueyama 2021-01-14 10:01:54 +09:00
parent 3929b19110
commit 1762d01ea5
2 changed files with 24 additions and 21 deletions
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41
input_sections.cc
View File

@ -159,11 +159,6 @@ void InputSection::copy_buf() {
};
auto write_dynrel = [&](u64 offset, u32 type, u32 symidx, i64 addend) {
if (!(shdr.sh_flags & SHF_WRITE))
Error() << *this << ": " << rel_to_string(rel.r_type)
<< " relocation against symbol `" << sym.name
<< "' can not be used; recompile with -fPIE";
memset(dynrel, 0, sizeof(*dynrel));
dynrel->r_offset = offset;
dynrel->r_type = type;
@ -261,13 +256,19 @@ void InputSection::scan_relocations() {
for (int i = 0; i < rels.size(); i++) {
const ElfRela &rel = rels[i];
Symbol &sym = *file->symbols[rel.r_sym];
bool is_code = !(sym.st_type == STT_OBJECT);
if (!sym.file || sym.is_placeholder) {
Error() << "undefined symbol: " << *file << ": " << sym.name;
continue;
}
bool is_code = !(sym.st_type == STT_OBJECT);
auto dynrel_check = [&]() {
if (!(shdr.sh_flags & SHF_WRITE))
Error() << *this << ": " << rel_to_string(rel.r_type)
<< " relocation against symbol `" << sym.name
<< "' can not be used; recompile with -fPIE";
};
switch (rel.r_type) {
case R_X86_64_NONE:
@ -277,74 +278,76 @@ void InputSection::scan_relocations() {
case R_X86_64_16:
case R_X86_64_32:
case R_X86_64_32S:
rel_types[i] = R_ABS;
if (sym.is_imported)
sym.flags |= is_code ? NEEDS_PLT : NEEDS_COPYREL;
rel_types[i] = R_ABS;
break;
case R_X86_64_64:
if (config.pie) {
if (sym.is_imported) {
rel_types[i] = R_DYN;
dynrel_check();
sym.flags |= NEEDS_DYNSYM;
rel_types[i] = R_DYN;
file->num_dynrel++;
} else if (sym.is_relative()) {
dynrel_check();
rel_types[i] = R_ABS_DYN;
file->num_dynrel++;
} else {
rel_types[i] = R_ABS;
}
} else {
rel_types[i] = R_ABS;
if (sym.is_imported)
sym.flags |= is_code ? NEEDS_PLT : NEEDS_COPYREL;
rel_types[i] = R_ABS;
}
break;
case R_X86_64_PC8:
case R_X86_64_PC16:
case R_X86_64_PC32:
case R_X86_64_PC64:
rel_types[i] = R_PC;
if (sym.is_imported)
sym.flags |= is_code ? NEEDS_PLT : NEEDS_COPYREL;
rel_types[i] = R_PC;
break;
case R_X86_64_GOT32:
rel_types[i] = R_GOT;
sym.flags |= NEEDS_GOT;
rel_types[i] = R_GOT;
break;
case R_X86_64_GOTPC32:
rel_types[i] = R_GOTPC;
sym.flags |= NEEDS_GOT;
rel_types[i] = R_GOTPC;
break;
case R_X86_64_GOTPCREL:
case R_X86_64_GOTPCRELX:
case R_X86_64_REX_GOTPCRELX:
rel_types[i] = R_GOTPCREL;
sym.flags |= NEEDS_GOT;
rel_types[i] = R_GOTPCREL;
break;
case R_X86_64_PLT32:
rel_types[i] = R_PC;
if (sym.is_imported || sym.st_type == STT_GNU_IFUNC)
sym.flags |= NEEDS_PLT;
rel_types[i] = R_PC;
break;
case R_X86_64_TLSGD:
if (rels[i + 1].r_type != R_X86_64_PLT32)
if (i + 1 == rels.size() || rels[i + 1].r_type != R_X86_64_PLT32)
Error() << *this << ": TLSGD reloc not followed by PLT32";
if (sym.is_imported) {
rel_types[i] = R_TLSGD;
sym.flags |= NEEDS_TLSGD;
rel_types[i] = R_TLSGD;
} else {
rel_types[i] = R_TLSGD_RELAX_LE;
i++;
}
break;
case R_X86_64_TLSLD:
if (rels[i + 1].r_type != R_X86_64_PLT32)
if (i + 1 == rels.size() || rels[i + 1].r_type != R_X86_64_PLT32)
Error() << *this << ": TLSLD reloc not followed by PLT32";
if (sym.is_imported) {
rel_types[i] = R_TLSLD;
sym.flags |= NEEDS_TLSLD;
rel_types[i] = R_TLSLD;
} else {
rel_types[i] = R_TLSLD_RELAX_LE;
i++;
@ -357,8 +360,8 @@ void InputSection::scan_relocations() {
rel_types[i] = R_TPOFF;
break;
case R_X86_64_GOTTPOFF:
rel_types[i] = R_GOTTPOFF;
sym.flags |= NEEDS_GOTTPOFF;
rel_types[i] = R_GOTTPOFF;
break;
default:
Error() << *this << ": unknown relocation: " << rel.r_type;

2
sha1.cc
View File

@ -17,7 +17,7 @@ void SHA1::get_result(u8 digest[hash_size]) {
}
for (int i = 0; i < hash_size; i++)
digest[i] = hash[i >> 2] >> 8 * (3 - (i & 3));
digest[i] = hash[i >> 2] >> (8 * (3 - (i & 3)));
}
void SHA1::update(const u8 *buf, u32 len) {