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Fix internal error in fix_errata on aarch64.

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The addresses of erratum stubs can be changed by relaxation passes, and
need to be updated.

gold/
	PR gold/20765
	* aarch64.cc (Aarch64_relobj::update_erratum_address): New method.
	(AArch64_relobj::scan_errata): Update addresses in stub table after
	relaxation pass.
This commit is contained in:
Peter Smith 2017-11-30 15:07:26 -08:00 committed by Cary Coutant
parent e0feb13342
commit fd6798fa2d
2 changed files with 32 additions and 0 deletions
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7
gold/ChangeLog
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@ -1,3 +1,10 @@
2017-11-30 Peter Smith <peter.smith@linaro.org>
PR gold/20765
* aarch64.cc (Aarch64_relobj::update_erratum_address): New method.
(AArch64_relobj::scan_errata): Update addresses in stub table after
relaxation pass.
2017-11-30 Peter Smith <peter.smith@linaro.org>
Cary Coutant <ccoutant@gmail.com>

25
gold/aarch64.cc
View File

@ -1031,6 +1031,18 @@ public:
set_erratum_address(AArch64_address addr)
{ this->erratum_address_ = addr; }
// Later relaxation passes of may alter the recorded erratum and destination
// address. Given an up to date output section address of shidx_ in
// relobj_ we can derive the erratum_address and destination address.
void
update_erratum_address(AArch64_address output_section_addr)
{
const int BPI = AArch64_insn_utilities<big_endian>::BYTES_PER_INSN;
AArch64_address updated_addr = output_section_addr + this->sh_offset_;
this->set_erratum_address(updated_addr);
this->set_destination_address(updated_addr + BPI);
}
// Comparator used to group Erratum_stubs in a set by (obj, shndx,
// sh_offset). We do not include 'type' in the calculation, because there is
// at most one stub type at (obj, shndx, sh_offset).
@ -2304,6 +2316,19 @@ AArch64_relobj<size, big_endian>::scan_errata(
output_address = poris->address();
}
// Update the addresses in previously generated erratum stubs. Unlike when
// we scan relocations for stubs, if section addresses have changed due to
// other relaxations we are unlikely to scan the same erratum instances
// again.
The_stub_table* stub_table = this->stub_table(shndx);
if (stub_table)
{
std::pair<Erratum_stub_set_iter, Erratum_stub_set_iter>
ipair(stub_table->find_erratum_stubs_for_input_section(this, shndx));
for (Erratum_stub_set_iter p = ipair.first; p != ipair.second; ++p)
(*p)->update_erratum_address(output_address);
}
section_size_type input_view_size = 0;
const unsigned char* input_view =
this->section_contents(shndx, &input_view_size, false);