#include "object.h"
#include "dynobj.h"
#include "plugin.h"
+#include "compressed_output.h"
namespace gold
{
+// Struct Read_symbols_data.
+
+// Destroy any remaining File_view objects.
+
+Read_symbols_data::~Read_symbols_data()
+{
+ if (this->section_headers != NULL)
+ delete this->section_headers;
+ if (this->section_names != NULL)
+ delete this->section_names;
+ if (this->symbols != NULL)
+ delete this->symbols;
+ if (this->symbol_names != NULL)
+ delete this->symbol_names;
+ if (this->versym != NULL)
+ delete this->versym;
+ if (this->verdef != NULL)
+ delete this->verdef;
+ if (this->verneed != NULL)
+ delete this->verneed;
+}
+
// Class Xindex.
// Initialize the symtab_xindex_ array. Find the SHT_SYMTAB_SHNDX
local_got_offsets_(),
kept_comdat_sections_(),
has_eh_frame_(false),
- discarded_eh_frame_shndx_(-1U)
+ discarded_eh_frame_shndx_(-1U),
+ deferred_layout_(),
+ deferred_layout_relocs_(),
+ compressed_sections_()
{
}
return false;
}
+// Build a table for any compressed debug sections, mapping each section index
+// to the uncompressed size.
+
+template<int size, bool big_endian>
+Compressed_section_map*
+build_compressed_section_map(
+ const unsigned char* pshdrs,
+ unsigned int shnum,
+ const char* names,
+ section_size_type names_size,
+ Sized_relobj<size, big_endian>* obj)
+{
+ Compressed_section_map* uncompressed_sizes = new Compressed_section_map();
+ const unsigned int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
+ const unsigned char* p = pshdrs + shdr_size;
+ for (unsigned int i = 1; i < shnum; ++i, p += shdr_size)
+ {
+ typename elfcpp::Shdr<size, big_endian> shdr(p);
+ if (shdr.get_sh_type() == elfcpp::SHT_PROGBITS
+ && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC) == 0)
+ {
+ if (shdr.get_sh_name() >= names_size)
+ {
+ obj->error(_("bad section name offset for section %u: %lu"),
+ i, static_cast<unsigned long>(shdr.get_sh_name()));
+ continue;
+ }
+
+ const char* name = names + shdr.get_sh_name();
+ if (is_compressed_debug_section(name))
+ {
+ section_size_type len;
+ const unsigned char* contents =
+ obj->section_contents(i, &len, false);
+ uint64_t uncompressed_size = get_uncompressed_size(contents, len);
+ if (uncompressed_size != -1ULL)
+ (*uncompressed_sizes)[i] =
+ convert_to_section_size_type(uncompressed_size);
+ }
+ }
+ }
+ return uncompressed_sizes;
+}
+
// Read the sections and symbols from an object file.
template<int size, bool big_endian>
if (this->find_eh_frame(pshdrs, names, sd->section_names_size))
this->has_eh_frame_ = true;
}
+ if (memmem(names, sd->section_names_size, ".zdebug_", 8) != NULL)
+ this->compressed_sections_ =
+ build_compressed_section_map(pshdrs, this->shnum(), names,
+ sd->section_names_size, this);
sd->symbols = NULL;
sd->symbols_size = 0;
}
Output_section* data_section = out_sections[data_shndx];
+ if (data_section == reinterpret_cast<Output_section*>(2))
+ {
+ // The layout for the data section was deferred, so we need
+ // to defer the relocation section, too.
+ const char* name = pnames + shdr.get_sh_name();
+ this->deferred_layout_relocs_.push_back(
+ Deferred_layout(i, name, pshdr, 0, elfcpp::SHT_NULL));
+ out_sections[i] = reinterpret_cast<Output_section*>(2);
+ out_section_offsets[i] = invalid_address;
+ continue;
+ }
if (data_section == NULL)
{
out_sections[i] = NULL;
++deferred)
{
typename This::Shdr shdr(deferred->shdr_data_);
+ // If the section is not included, it is because the garbage collector
+ // decided it is not needed. Avoid reverting that decision.
+ if (!this->is_section_included(deferred->shndx_))
+ continue;
+
this->layout_section(layout, deferred->shndx_, deferred->name_.c_str(),
shdr, deferred->reloc_shndx_, deferred->reloc_type_);
}
this->deferred_layout_.clear();
+
+ // Now handle the deferred relocation sections.
+
+ Output_sections& out_sections(this->output_sections());
+ std::vector<Address>& out_section_offsets(this->section_offsets_);
+
+ for (deferred = this->deferred_layout_relocs_.begin();
+ deferred != this->deferred_layout_relocs_.end();
+ ++deferred)
+ {
+ unsigned int shndx = deferred->shndx_;
+ typename This::Shdr shdr(deferred->shdr_data_);
+ unsigned int data_shndx = this->adjust_shndx(shdr.get_sh_info());
+
+ Output_section* data_section = out_sections[data_shndx];
+ if (data_section == NULL)
+ {
+ out_sections[shndx] = NULL;
+ out_section_offsets[shndx] = invalid_address;
+ continue;
+ }
+
+ Relocatable_relocs* rr = new Relocatable_relocs();
+ this->set_relocatable_relocs(shndx, rr);
+
+ Output_section* os = layout->layout_reloc(this, shndx, shdr,
+ data_section, rr);
+ out_sections[shndx] = os;
+ out_section_offsets[shndx] = invalid_address;
+ }
}
// Add the symbols to the symbol table.
sd->symbol_names = NULL;
}
+// Find out if this object, that is a member of a lib group, should be included
+// in the link. We check every symbol defined by this object. If the symbol
+// table has a strong undefined reference to that symbol, we have to include
+// the object.
+
+template<int size, bool big_endian>
+Archive::Should_include
+Sized_relobj<size, big_endian>::do_should_include_member(Symbol_table* symtab,
+ Read_symbols_data* sd,
+ std::string* why)
+{
+ char* tmpbuf = NULL;
+ size_t tmpbuflen = 0;
+ const char* sym_names =
+ reinterpret_cast<const char*>(sd->symbol_names->data());
+ const unsigned char* syms =
+ sd->symbols->data() + sd->external_symbols_offset;
+ const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
+ size_t symcount = ((sd->symbols_size - sd->external_symbols_offset)
+ / sym_size);
+
+ const unsigned char* p = syms;
+
+ for (size_t i = 0; i < symcount; ++i, p += sym_size)
+ {
+ elfcpp::Sym<size, big_endian> sym(p);
+ unsigned int st_shndx = sym.get_st_shndx();
+ if (st_shndx == elfcpp::SHN_UNDEF)
+ continue;
+
+ unsigned int st_name = sym.get_st_name();
+ const char* name = sym_names + st_name;
+ Symbol* symbol;
+ Archive::Should_include t = Archive::should_include_member(symtab, name,
+ &symbol, why,
+ &tmpbuf,
+ &tmpbuflen);
+ if (t == Archive::SHOULD_INCLUDE_YES)
+ {
+ if (tmpbuf != NULL)
+ free(tmpbuf);
+ return t;
+ }
+ }
+ if (tmpbuf != NULL)
+ free(tmpbuf);
+ return Archive::SHOULD_INCLUDE_UNKNOWN;
+}
+
// First pass over the local symbols. Here we add their names to
// *POOL and *DYNPOOL, and we store the symbol value in
// THIS->LOCAL_VALUES_. This function is always called from a
const Output_section_data* posd =
os->find_relaxed_input_section(this, shndx);
if (posd != NULL)
- lv.set_output_value(posd->address());
+ {
+ Address relocatable_link_adjustment =
+ relocatable ? os->address() : 0;
+ lv.set_output_value(posd->address()
+ - relocatable_link_adjustment);
+ }
else
lv.set_output_value(os->address());
}
{
// We have to consider the addend to determine the
// value to use in a relocation. START is the start
- // of this input section.
+ // of this input section. If we are doing a relocatable
+ // link, use offset from start output section instead of
+ // address.
+ Address adjusted_start =
+ relocatable ? start - os->address() : start;
Merged_symbol_value<size>* msv =
- new Merged_symbol_value<size>(lv.input_value(), start);
+ new Merged_symbol_value<size>(lv.input_value(),
+ adjusted_start);
lv.set_merged_symbol_value(msv);
}
}
projects / binutils-gdb.git / blobdiff