#include "llvm/Object/Archive.h"
#include "llvm/ADT/APInt.h"
+#include "llvm/Support/Endian.h"
#include "llvm/Support/MemoryBuffer.h"
using namespace llvm;
using namespace object;
-namespace {
-const StringRef Magic = "!<arch>\n";
+static const char *Magic = "!<arch>\n";
+namespace {
struct ArchiveMemberHeader {
char Name[16];
char LastModified[12];
///! Get the name without looking up long names.
StringRef getName() const {
- char EndCond = Name[0] == '/' ? ' ' : '/';
+ char EndCond;
+ if (Name[0] == '/' || Name[0] == '#')
+ EndCond = ' ';
+ else
+ EndCond = '/';
StringRef::size_type end = StringRef(Name, sizeof(Name)).find(EndCond);
if (end == StringRef::npos)
end = sizeof(Name);
return ret.getZExtValue();
}
};
+}
-const ArchiveMemberHeader *ToHeader(const char *base) {
+static const ArchiveMemberHeader *ToHeader(const char *base) {
return reinterpret_cast<const ArchiveMemberHeader *>(base);
}
+
+
+static bool isInternalMember(const ArchiveMemberHeader &amh) {
+ const char *internals[] = {
+ "/",
+ "//",
+ "#_LLVM_SYM_TAB_#"
+ };
+
+ StringRef name = amh.getName();
+ for (std::size_t i = 0; i < sizeof(internals) / sizeof(*internals); ++i) {
+ if (name == internals[i])
+ return true;
+ }
+ return false;
}
+void Archive::anchor() { }
+
Archive::Child Archive::Child::getNext() const {
size_t SpaceToSkip = sizeof(ArchiveMemberHeader) +
ToHeader(Data.data())->getSize();
return object_error::parse_failed;
Result = addr;
return object_error::success;
+ } else if (name.startswith("#1/")) {
+ APInt name_size;
+ name.substr(3).getAsInteger(10, name_size);
+ Result = Data.substr(0, name_size.getZExtValue());
+ return object_error::success;
}
// It's a simple name.
if (name[name.size() - 1] == '/')
}
uint64_t Archive::Child::getSize() const {
- return ToHeader(Data.data())->getSize();
+ uint64_t size = ToHeader(Data.data())->getSize();
+ // Don't include attached name.
+ StringRef name = ToHeader(Data.data())->getName();
+ if (name.startswith("#1/")) {
+ APInt name_size;
+ name.substr(3).getAsInteger(10, name_size);
+ size -= name_size.getZExtValue();
+ }
+ return size;
}
MemoryBuffer *Archive::Child::getBuffer() const {
StringRef name;
if (getName(name)) return NULL;
- return MemoryBuffer::getMemBuffer(Data.substr(sizeof(ArchiveMemberHeader),
- getSize()),
+ int size = sizeof(ArchiveMemberHeader);
+ if (name.startswith("#1/")) {
+ APInt name_size;
+ name.substr(3).getAsInteger(10, name_size);
+ size += name_size.getZExtValue();
+ }
+ return MemoryBuffer::getMemBuffer(Data.substr(size, getSize()),
name,
false);
}
}
Archive::Archive(MemoryBuffer *source, error_code &ec)
- : Binary(Binary::isArchive, source)
- , StringTable(Child(this, StringRef(0, 0))) {
+ : Binary(Binary::ID_Archive, source) {
// Check for sufficient magic.
if (!source || source->getBufferSize()
< (8 + sizeof(ArchiveMemberHeader) + 2) // Smallest archive.
return;
}
- // Get the string table. It's the 3rd member.
- child_iterator StrTable = begin_children();
+ // Get the special members.
+ child_iterator i = begin_children(false);
child_iterator e = end_children();
- for (int i = 0; StrTable != e && i < 2; ++StrTable, ++i);
- // Check to see if there were 3 members, or the 3rd member wasn't named "//".
- StringRef name;
- if (StrTable != e && !StrTable->getName(name) && name == "//")
- StringTable = StrTable;
+ if (i != e) ++i; // Nobody cares about the first member.
+ if (i != e) {
+ SymbolTable = i;
+ ++i;
+ }
+ if (i != e) {
+ StringTable = i;
+ }
ec = object_error::success;
}
-Archive::child_iterator Archive::begin_children() {
- const char *Loc = Data->getBufferStart() + Magic.size();
+Archive::child_iterator Archive::begin_children(bool skip_internal) const {
+ const char *Loc = Data->getBufferStart() + strlen(Magic);
size_t Size = sizeof(ArchiveMemberHeader) +
ToHeader(Loc)->getSize();
- return Child(this, StringRef(Loc, Size));
+ Child c(this, StringRef(Loc, Size));
+ // Skip internals at the beginning of an archive.
+ if (skip_internal && isInternalMember(*ToHeader(Loc)))
+ return c.getNext();
+ return c;
}
-Archive::child_iterator Archive::end_children() {
+Archive::child_iterator Archive::end_children() const {
return Child(this, StringRef(0, 0));
}
-namespace llvm {
+error_code Archive::Symbol::getName(StringRef &Result) const {
+ Result =
+ StringRef(Parent->SymbolTable->getBuffer()->getBufferStart() + StringIndex);
+ return object_error::success;
+}
+
+error_code Archive::Symbol::getMember(child_iterator &Result) const {
+ const char *buf = Parent->SymbolTable->getBuffer()->getBufferStart();
+ uint32_t member_count = *reinterpret_cast<const support::ulittle32_t*>(buf);
+ const char *offsets = buf + 4;
+ buf += 4 + (member_count * 4); // Skip offsets.
+ const char *indicies = buf + 4;
+
+ uint16_t offsetindex =
+ *(reinterpret_cast<const support::ulittle16_t*>(indicies)
+ + SymbolIndex);
+
+ uint32_t offset = *(reinterpret_cast<const support::ulittle32_t*>(offsets)
+ + (offsetindex - 1));
-} // end namespace llvm
+ const char *Loc = Parent->getData().begin() + offset;
+ size_t Size = sizeof(ArchiveMemberHeader) +
+ ToHeader(Loc)->getSize();
+ Result = Child(Parent, StringRef(Loc, Size));
+
+ return object_error::success;
+}
+
+Archive::Symbol Archive::Symbol::getNext() const {
+ Symbol t(*this);
+ // Go to one past next null.
+ t.StringIndex =
+ Parent->SymbolTable->getBuffer()->getBuffer().find('\0', t.StringIndex) + 1;
+ ++t.SymbolIndex;
+ return t;
+}
+
+Archive::symbol_iterator Archive::begin_symbols() const {
+ const char *buf = SymbolTable->getBuffer()->getBufferStart();
+ uint32_t member_count = *reinterpret_cast<const support::ulittle32_t*>(buf);
+ buf += 4 + (member_count * 4); // Skip offsets.
+ uint32_t symbol_count = *reinterpret_cast<const support::ulittle32_t*>(buf);
+ buf += 4 + (symbol_count * 2); // Skip indices.
+ uint32_t string_start_offset =
+ buf - SymbolTable->getBuffer()->getBufferStart();
+ return symbol_iterator(Symbol(this, 0, string_start_offset));
+}
+
+Archive::symbol_iterator Archive::end_symbols() const {
+ const char *buf = SymbolTable->getBuffer()->getBufferStart();
+ uint32_t member_count = *reinterpret_cast<const support::ulittle32_t*>(buf);
+ buf += 4 + (member_count * 4); // Skip offsets.
+ uint32_t symbol_count = *reinterpret_cast<const support::ulittle32_t*>(buf);
+ return symbol_iterator(
+ Symbol(this, symbol_count, 0));
+}
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