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2009-08-11 Doug Kwan <dougkwan@google.com>

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* arm.cc: Update comments.
	(Target_arm::do_finalize_sections): Add a special PT_ARM_EXIDX
	segment to locate the .ARM.exidx section if present.
This commit is contained in:
Doug Kwan
2009-08-11 17:09:14 +00:00
parent 6a9adeca2c
commit 11af873fca
2 changed files with 29 additions and 8 deletions
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31
gold/arm.cc
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@@ -74,18 +74,14 @@ class Output_data_plt_arm;
// R_ARM_TARGET1
// R_ARM_PREL31
//
// Coming soon (pending patches):
// - Defining section symbols __exidx_start and __exidx_stop.
// - Support interworking.
// - Mergeing all .ARM.xxx.yyy sections into .ARM.xxx. Currently, they
// are incorrectly merged into an .ARM section.
//
// TODOs:
// - Create a PT_ARM_EXIDX program header for a shared object that
// might throw an exception.
// - Generate various branch stubs.
// - Support interworking.
// - Define section symbols __exidx_start and __exidx_stop.
// - Support more relocation types as needed.
// - Make PLTs more flexible for different architecture features like
// Thumb-2 and BE8.
// There are probably a lot more.
// Utilities for manipulating integers of up to 32-bits
@@ -1463,6 +1459,25 @@ Target_arm<big_endian>::do_finalize_sections(Layout* layout)
// relocs.
if (this->copy_relocs_.any_saved_relocs())
this->copy_relocs_.emit(this->rel_dyn_section(layout));
// For the ARM target, we need to add a PT_ARM_EXIDX segment for
// the .ARM.exidx section.
if (!layout->script_options()->saw_phdrs_clause()
&& !parameters->options().relocatable())
{
Output_section* exidx_section =
layout->find_output_section(".ARM.exidx");
if (exidx_section != NULL
&& exidx_section->type() == elfcpp::SHT_ARM_EXIDX)
{
gold_assert(layout->find_output_segment(elfcpp::PT_ARM_EXIDX, 0, 0)
== NULL);
Output_segment* exidx_segment =
layout->make_output_segment(elfcpp::PT_ARM_EXIDX, elfcpp::PF_R);
exidx_segment->add_output_section(exidx_section, elfcpp::PF_R);
}
}
}
// Return whether a direct absolute static relocation needs to be applied.