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This commit is contained in:
Rui Ueyama 2020-10-22 23:19:48 +09:00
parent e51b2069be
commit da2757722d
2 changed files with 16 additions and 12 deletions
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2
input_files.cc
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@ -75,6 +75,8 @@ void ObjectFile::initialize_sections() {
default: {
StringRef name = CHECK(obj.getSectionName(shdr, section_strtab), this);
this->sections[i] = new InputSection(this, &shdr, name);
if (name == ".init_array" && (shdr.sh_type & SHT_NOBITS))
llvm::outs() << toString(this) << "\n";
break;
}
}

26
main.cc
View File

@ -101,26 +101,25 @@ static void read_file(std::vector<ObjectFile *> &files, StringRef path) {
}
}
thread_local int foo;
thread_local int bar = 5;
// We want to sort output sections in the following order.
//
// alloc !writable !exec !tls !nobits
// alloc !writable !exec !tls nobits
// alloc !writable !exec tls !nobits
// alloc !writable !exec tls nobits
// alloc !writable exec
// alloc writable !exec !tls !nobits
// alloc writable !exec !tls nobits
// alloc writable !exec tls !nobits
// alloc writable !exec tls nobits
// alloc writable exec
// !alloc
// alloc readonly data
// alloc readonly code
// alloc writable tdata
// alloc writable tbss
// alloc writable data
// alloc writable bss
// nonalloc
static int get_rank(OutputSection *x) {
bool alloc = x->hdr.sh_flags & SHF_ALLOC;
bool writable = x->hdr.sh_flags & SHF_WRITE;
bool exec = x->hdr.sh_flags & SHF_EXECINSTR;
bool tls = x->hdr.sh_flags & SHF_TLS;
bool nobits = x->hdr.sh_type & SHT_NOBITS;
return (alloc << 5) | (!writable << 4) | (!exec << 3) | (!tls << 2) | !nobits;
return (alloc << 5) | (!writable << 4) | (!exec << 3) | (tls << 2) | !nobits;
}
static std::vector<OutputSection *> get_output_sections() {
@ -129,6 +128,9 @@ static std::vector<OutputSection *> get_output_sections() {
if (!osec->chunks.empty())
vec.push_back(osec);
for (OutputSection *osec : vec)
llvm::outs() << osec->name << ": " << get_rank(osec) << "\n";
std::sort(vec.begin(), vec.end(), [](OutputSection *a, OutputSection *b) {
int x = get_rank(a);
int y = get_rank(b);