// script-sections.cc -- linker script SECTIONS for gold
-// Copyright 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
+// Copyright (C) 2008-2015 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
script_exp_binary_add(this->start_,
script_exp_integer(this->current_offset_));
}
-
+
+ void
+ set_address(uint64_t addr, const Symbol_table* symtab, const Layout* layout)
+ {
+ uint64_t start = this->start_->eval(symtab, layout, false);
+ uint64_t len = this->length_->eval(symtab, layout, false);
+ if (addr < start || addr >= start + len)
+ gold_error(_("address 0x%llx is not within region %s"),
+ static_cast<unsigned long long>(addr),
+ this->name_.c_str());
+ else if (addr < start + this->current_offset_)
+ gold_error(_("address 0x%llx moves dot backwards in region %s"),
+ static_cast<unsigned long long>(addr),
+ this->name_.c_str());
+ this->current_offset_ = addr - start;
+ }
+
void
increment_offset(std::string section_name, uint64_t amount,
const Symbol_table* symtab, const Layout* layout)
gold_error(_("section %s overflows end of region %s"),
section_name.c_str(), this->name_.c_str());
}
-
+
// Returns true iff there is room left in this region
// for AMOUNT more bytes of data.
bool
// are compatible with this region's attributes.
bool
attributes_compatible(elfcpp::Elf_Xword flags, elfcpp::Elf_Xword type) const;
-
+
void
add_section(Output_section_definition* sec, bool vma)
{
// Set the section name.
void
set_section_name(const std::string name)
- { this->section_name_ = name; }
+ {
+ if (is_compressed_debug_section(name.c_str()))
+ this->section_name_ = corresponding_uncompressed_section_name(name);
+ else
+ this->section_name_ = name;
+ }
// Return the section size.
uint64_t
// We build a list of sections which match each
// Input_section_pattern.
+ // If none of the patterns specify a sort option, we throw all
+ // matching input sections into a single bin, in the order we
+ // find them. Otherwise, we put matching input sections into
+ // a separate bin for each pattern, and sort each one as
+ // specified. Thus, an input section spec like this:
+ // *(.foo .bar)
+ // will group all .foo and .bar sections in the order seen,
+ // whereas this:
+ // *(.foo) *(.bar)
+ // will group all .foo sections followed by all .bar sections.
+ // This matches Gnu ld behavior.
+
+ // Things get really weird, though, when you add a sort spec
+ // on some, but not all, of the patterns, like this:
+ // *(SORT_BY_NAME(.foo) .bar)
+ // We do not attempt to match Gnu ld behavior in this case.
+
typedef std::vector<std::vector<Input_section_info> > Matching_sections;
size_t input_pattern_count = this->input_section_patterns_.size();
- if (input_pattern_count == 0)
+ bool any_patterns_with_sort = false;
+ for (size_t i = 0; i < input_pattern_count; ++i)
+ {
+ const Input_section_pattern& isp(this->input_section_patterns_[i]);
+ if (isp.sort != SORT_WILDCARD_NONE)
+ any_patterns_with_sort = true;
+ }
+ if (input_pattern_count == 0 || !any_patterns_with_sort)
input_pattern_count = 1;
Matching_sections matching_sections(input_pattern_count);
++p;
else
{
+ if (!any_patterns_with_sort)
+ i = 0;
matching_sections[i].push_back(isi);
p = input_sections->erase(p);
}
Script_sections::find_memory_region(
Output_section_definition* section,
bool find_vma_region,
+ bool explicit_only,
Output_section_definition** previous_section_return)
{
if (previous_section_return != NULL)
}
}
- // Make a note of the first memory region whose attributes
- // are compatible with the section. If we do not find an
- // explicit region assignment, then we will return this region.
- Output_section* out_sec = section->get_output_section();
- if (first_match == NULL
- && out_sec != NULL
- && (*mr)->attributes_compatible(out_sec->flags(),
- out_sec->type()))
- first_match = *mr;
+ if (!explicit_only)
+ {
+ // Make a note of the first memory region whose attributes
+ // are compatible with the section. If we do not find an
+ // explicit region assignment, then we will return this region.
+ Output_section* out_sec = section->get_output_section();
+ if (first_match == NULL
+ && out_sec != NULL
+ && (*mr)->attributes_compatible(out_sec->flags(),
+ out_sec->type()))
+ first_match = *mr;
+ }
}
// With LMA computations, if an explicit region has not been specified then
uint64_t old_dot_value = *dot_value;
uint64_t old_load_address = *load_address;
+ // If input section sorting is requested via --section-ordering-file or
+ // linker plugins, then do it here. This is important because we want
+ // any sorting specified in the linker scripts, which will be done after
+ // this, to take precedence. The final order of input sections is then
+ // guaranteed to be according to the linker script specification.
+ if (this->output_section_ != NULL
+ && this->output_section_->input_section_order_specified())
+ this->output_section_->sort_attached_input_sections();
+
// Decide the start address for the section. The algorithm is:
// 1) If an address has been specified in a linker script, use that.
// 2) Otherwise if a memory region has been specified for the section,
;
else if (this->address_ == NULL)
{
- vma_region = script_sections->find_memory_region(this, true, NULL);
-
+ vma_region = script_sections->find_memory_region(this, true, false, NULL);
if (vma_region != NULL)
address = vma_region->get_current_address()->eval(symtab, layout,
false);
address = *dot_value;
}
else
- address = this->address_->eval_with_dot(symtab, layout, true,
- *dot_value, NULL, NULL,
- dot_alignment, false);
+ {
+ vma_region = script_sections->find_memory_region(this, true, true, NULL);
+ address = this->address_->eval_with_dot(symtab, layout, true,
+ *dot_value, NULL, NULL,
+ dot_alignment, false);
+ if (vma_region != NULL)
+ vma_region->set_address(address, symtab, layout);
+ }
+
uint64_t align;
if (this->align_ == NULL)
{
Output_section_definition* previous_section;
// Determine if an LMA region has been set for this section.
- lma_region = script_sections->find_memory_region(this, false,
+ lma_region = script_sections->find_memory_region(this, false, false,
&previous_section);
if (lma_region != NULL)
uint64_t address = *dot_value;
address = align_address(address, this->os_->addralign());
+ // If input section sorting is requested via --section-ordering-file or
+ // linker plugins, then do it here. This is important because we want
+ // any sorting specified in the linker scripts, which will be done after
+ // this, to take precedence. The final order of input sections is then
+ // guaranteed to be according to the linker script specification.
+ if (this->os_ != NULL
+ && this->os_->input_section_order_specified())
+ this->os_->sort_attached_input_sections();
+
// For a relocatable link, all orphan sections are put at
// address 0. In general we expect all sections to be at
// address 0 for a relocatable link, but we permit the linker
address += size;
}
- // An SHF_TLS/SHT_NOBITS section does not take up any address space.
- if (this->os_ == NULL
- || (this->os_->flags() & elfcpp::SHF_TLS) == 0
- || this->os_->type() != elfcpp::SHT_NOBITS)
+ if (parameters->options().relocatable())
+ {
+ // For a relocatable link, reset DOT_VALUE to 0.
+ *dot_value = 0;
+ *load_address = 0;
+ }
+ else if (this->os_ == NULL
+ || (this->os_->flags() & elfcpp::SHF_TLS) == 0
+ || this->os_->type() != elfcpp::SHT_NOBITS)
{
+ // An SHF_TLS/SHT_NOBITS section does not take up any address space.
if (!have_load_address)
*load_address = address;
else
data_segment_align_start_(),
saw_data_segment_align_(false),
saw_relro_end_(false),
- saw_segment_start_expression_(false)
+ saw_segment_start_expression_(false),
+ segments_created_(false)
{
}
saw_tls = true;
}
- // If we are making a shared library, and we see a section named
- // .interp then put the .interp section in a PT_INTERP segment.
+ // If we see a section named .interp then put the .interp section
+ // in a PT_INTERP segment.
// This is for GNU ld compatibility.
if (strcmp((*p)->name(), ".interp") == 0)
{
oseg->add_output_section_to_nonload(*p, seg_flags);
}
}
+
+ this->segments_created_ = true;
}
// Add a program header. The PHDRS clause is syntactically distinct
size_t
Script_sections::expected_segment_count(const Layout* layout) const
{
+ // If we've already created the segments, we won't be adding any more.
+ if (this->segments_created_)
+ return 0;
+
if (this->saw_phdrs_clause())
return this->phdrs_elements_->size();
bool saw_note = false;
bool saw_tls = false;
+ bool saw_interp = false;
for (Layout::Section_list::const_iterator p = sections.begin();
p != sections.end();
++p)
saw_tls = true;
}
}
+ else if (strcmp((*p)->name(), ".interp") == 0)
+ {
+ // There can only be one PT_INTERP segment.
+ if (!saw_interp)
+ {
+ ++ret;
+ saw_interp = true;
+ }
+ }
}
return ret;
p != this->phdrs_elements_->end();
++p)
name_to_segment[(*p)->name()] = (*p)->create_segment(layout);
+ this->segments_created_ = true;
// Walk through the output sections and attach them to segments.
// Output sections in the script which do not list segments are
projects / deliverable / binutils-gdb.git / blobdiff