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PR 10219

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* layout.cc (Layout::Layout): Initialize have_stabstr_section_.
	(Layout::make_output_section): Set have_stabstr_section_ if we see
	a .stab*str section.
	(Layout::finalize): Call link_stabs_sections.
	(Layout::link_stabs_sections): New file.
	* layout.h (class Layout): Add have_stabstr_section_ field.
	Declare link_stabs_sections.
This commit is contained in:
Ian Lance Taylor
2009-06-24 00:38:00 +00:00
parent a71d586486
commit 1518dc8f89
3 changed files with 61 additions and 0 deletions
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44
gold/layout.cc
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@@ -124,6 +124,7 @@ Layout::Layout(int number_of_input_files, Script_options* script_options)
has_static_tls_(false),
any_postprocessing_sections_(false),
resized_signatures_(false),
have_stabstr_section_(false),
incremental_inputs_(NULL)
{
// Make space for more than enough segments for a typical file.
@@ -823,6 +824,14 @@ Layout::make_output_section(const char* name, elfcpp::Elf_Word type,
}
}
// Check for .stab*str sections, as .stab* sections need to link to
// them.
if (type == elfcpp::SHT_STRTAB
&& !this->have_stabstr_section_
&& strncmp(name, ".stab", 5) == 0
&& strcmp(name + strlen(name) - 3, "str") == 0)
this->have_stabstr_section_ = true;
// If we have already attached the sections to segments, then we
// need to attach this one now. This happens for sections created
// directly by the linker.
@@ -1192,6 +1201,7 @@ Layout::finalize(const Input_objects* input_objects, Symbol_table* symtab,
this->create_gold_note();
this->create_executable_stack_info(target);
this->create_build_id();
this->link_stabs_sections();
Output_segment* phdr_seg = NULL;
if (!parameters->options().relocatable() && !parameters->doing_static_link())
@@ -1616,6 +1626,40 @@ Layout::create_build_id()
}
}
// If we have both .stabXX and .stabXXstr sections, then the sh_link
// field of the former should point to the latter. I'm not sure who
// started this, but the GNU linker does it, and some tools depend
// upon it.
void
Layout::link_stabs_sections()
{
if (!this->have_stabstr_section_)
return;
for (Section_list::iterator p = this->section_list_.begin();
p != this->section_list_.end();
++p)
{
if ((*p)->type() != elfcpp::SHT_STRTAB)
continue;
const char* name = (*p)->name();
if (strncmp(name, ".stab", 5) != 0)
continue;
size_t len = strlen(name);
if (strcmp(name + len - 3, "str") != 0)
continue;
std::string stab_name(name, len - 3);
Output_section* stab_sec;
stab_sec = this->find_output_section(stab_name.c_str());
if (stab_sec != NULL)
stab_sec->set_link_section(*p);
}
}
// Create .gnu_incremental_inputs and .gnu_incremental_strtab sections needed
// for the next run of incremental linking to check what has changed.