// aarch64.cc -- aarch64 target support for gold.
-// Copyright (C) 2014-2017 Free Software Foundation, Inc.
+// Copyright (C) 2014-2020 Free Software Foundation, Inc.
// Written by Jing Yu <jingyu@google.com> and Han Shen <shenhan@google.com>.
// This file is part of gold.
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).
void
invalidate_erratum_stub()
{
- gold_assert(this->relobj_ != NULL);
- this->relobj_ = NULL;
+ gold_assert(this->erratum_insn_ != invalid_insn);
+ this->erratum_insn_ = invalid_insn;
}
bool
is_invalidated_erratum_stub()
- { return this->relobj_ == NULL; }
+ { return this->erratum_insn_ == invalid_insn; }
protected:
virtual void
// applied.
bool
try_fix_erratum_843419_optimized(
- The_erratum_stub*,
+ The_erratum_stub*, AArch64_address,
typename Sized_relobj_file<size, big_endian>::View_size&);
// Whether a section needs to be scanned for relocation stubs.
{
typedef typename elfcpp::Swap<32,big_endian>::Valtype Insntype;
unsigned int shnum = this->shnum();
+ const Relobj::Output_sections& out_sections(this->output_sections());
for (unsigned int i = 1; i < shnum; ++i)
{
The_stub_table* stub_table = this->stub_table(i);
std::pair<Erratum_stub_set_iter, Erratum_stub_set_iter>
ipair(stub_table->find_erratum_stubs_for_input_section(this, i));
Erratum_stub_set_iter p = ipair.first, end = ipair.second;
+ typename Sized_relobj_file<size, big_endian>::View_size&
+ pview((*pviews)[i]);
+ AArch64_address view_offset = 0;
+ if (pview.is_input_output_view)
+ {
+ // In this case, write_sections has not added the output offset to
+ // the view's address, so we must do so. Currently this only happens
+ // for a relaxed section.
+ unsigned int index = this->adjust_shndx(i);
+ const Output_relaxed_input_section* poris =
+ out_sections[index]->find_relaxed_input_section(this, index);
+ gold_assert(poris != NULL);
+ view_offset = poris->address() - pview.address;
+ }
+
while (p != end)
{
The_erratum_stub* stub = *p;
- typename Sized_relobj_file<size, big_endian>::View_size&
- pview((*pviews)[i]);
// Double check data before fix.
- gold_assert(pview.address + stub->sh_offset()
+ gold_assert(pview.address + view_offset + stub->sh_offset()
== stub->erratum_address());
// Update previously recorded erratum insn with relocated
// version.
Insntype* ip =
- reinterpret_cast<Insntype*>(pview.view + stub->sh_offset());
+ reinterpret_cast<Insntype*>(
+ pview.view + view_offset + stub->sh_offset());
Insntype insn_to_fix = ip[0];
stub->update_erratum_insn(insn_to_fix);
// First try to see if erratum is 843419 and if it can be fixed
// without using branch-to-stub.
- if (!try_fix_erratum_843419_optimized(stub, pview))
+ if (!try_fix_erratum_843419_optimized(stub, view_offset, pview))
{
// Replace the erratum insn with a branch-to-stub.
AArch64_address stub_address =
stub_table->erratum_stub_address(stub);
unsigned int b_offset = stub_address - stub->erratum_address();
AArch64_relocate_functions<size, big_endian>::construct_b(
- pview.view + stub->sh_offset(), b_offset & 0xfffffff);
+ pview.view + view_offset + stub->sh_offset(),
+ b_offset & 0xfffffff);
}
// Erratum fix is done (or skipped), continue to relocate erratum
// erratum stub, ignoring the fact the erratum could never be
// executed.
stub_table->relocate_erratum_stub(
- stub, pview.view + (stub_table->address() - pview.address));
+ stub,
+ pview.view + (stub_table->address() - pview.address));
// Next erratum stub.
++p;
template<int size, bool big_endian>
bool
AArch64_relobj<size, big_endian>::try_fix_erratum_843419_optimized(
- The_erratum_stub* stub,
+ The_erratum_stub* stub, AArch64_address view_offset,
typename Sized_relobj_file<size, big_endian>::View_size& pview)
{
if (stub->type() != ST_E_843419)
typedef typename elfcpp::Swap<32,big_endian>::Valtype Insntype;
E843419_stub<size, big_endian>* e843419_stub =
reinterpret_cast<E843419_stub<size, big_endian>*>(stub);
- AArch64_address pc = pview.address + e843419_stub->adrp_sh_offset();
+ AArch64_address pc =
+ pview.address + view_offset + e843419_stub->adrp_sh_offset();
unsigned int adrp_offset = e843419_stub->adrp_sh_offset ();
- Insntype* adrp_view = reinterpret_cast<Insntype*>(pview.view + adrp_offset);
+ Insntype* adrp_view =
+ reinterpret_cast<Insntype*>(pview.view + view_offset + adrp_offset);
Insntype adrp_insn = adrp_view[0];
// If the instruction at adrp_sh_offset is "mrs R, tpidr_el0", it may come
// return true.
if (!Insn_utilities::is_adrp(adrp_insn) && adrp_offset)
{
- Insntype* prev_view
- = reinterpret_cast<Insntype*>(pview.view + adrp_offset - 4);
+ Insntype* prev_view =
+ reinterpret_cast<Insntype*>(
+ pview.view + view_offset + adrp_offset - 4);
Insntype prev_insn = prev_view[0];
if (Insn_utilities::is_mrs_tpidr_el0(prev_insn))
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);
false, // has_make_symbol
false, // has_resolve
false, // has_code_fill
- true, // is_default_stack_executable
+ false, // is_default_stack_executable
true, // can_icf_inline_merge_sections
'\0', // wrap_char
"/lib/ld.so.1", // program interpreter
NULL, // attributes_vendor
"_start", // entry_symbol_name
32, // hash_entry_size
+ elfcpp::SHT_PROGBITS, // unwind_section_type
};
template<>
false, // has_make_symbol
false, // has_resolve
false, // has_code_fill
- true, // is_default_stack_executable
+ false, // is_default_stack_executable
false, // can_icf_inline_merge_sections
'\0', // wrap_char
"/lib/ld.so.1", // program interpreter
NULL, // attributes_vendor
"_start", // entry_symbol_name
32, // hash_entry_size
+ elfcpp::SHT_PROGBITS, // unwind_section_type
};
template<>
false, // has_make_symbol
false, // has_resolve
false, // has_code_fill
- true, // is_default_stack_executable
+ false, // is_default_stack_executable
true, // can_icf_inline_merge_sections
'\0', // wrap_char
"/lib/ld.so.1", // program interpreter
NULL, // attributes_vendor
"_start", // entry_symbol_name
32, // hash_entry_size
+ elfcpp::SHT_PROGBITS, // unwind_section_type
};
template<>
false, // has_make_symbol
false, // has_resolve
false, // has_code_fill
- true, // is_default_stack_executable
+ false, // is_default_stack_executable
false, // can_icf_inline_merge_sections
'\0', // wrap_char
"/lib/ld.so.1", // program interpreter
NULL, // attributes_vendor
"_start", // entry_symbol_name
32, // hash_entry_size
+ elfcpp::SHT_PROGBITS, // unwind_section_type
};
// Get the GOT section, creating it if necessary.
const Symbol_value<size> *psymval;
bool is_defined_in_discarded_section;
unsigned int shndx;
+ const Symbol* gsym = NULL;
if (r_sym < local_count)
{
sym = NULL;
}
else
{
- const Symbol* gsym;
gsym = object->global_symbol(r_sym);
gold_assert(gsym != NULL);
if (gsym->is_forwarder())
Symbol_value<size> symval2;
if (is_defined_in_discarded_section)
{
+ std::string name = object->section_name(relinfo->data_shndx);
+
if (comdat_behavior == CB_UNDETERMINED)
- {
- std::string name = object->section_name(relinfo->data_shndx);
comdat_behavior = default_comdat_behavior.get(name.c_str());
- }
+
if (comdat_behavior == CB_PRETEND)
{
bool found;
typename elfcpp::Elf_types<size>::Elf_Addr value =
- object->map_to_kept_section(shndx, &found);
+ object->map_to_kept_section(shndx, name, &found);
if (found)
symval2.set_output_value(value + psymval->input_value());
else
}
else
{
- if (comdat_behavior == CB_WARNING)
- gold_warning_at_location(relinfo, i, offset,
- _("relocation refers to discarded "
- "section"));
+ if (comdat_behavior == CB_ERROR)
+ issue_discarded_error(relinfo, i, offset, r_sym, gsym);
symval2.set_output_value(0);
}
symval2.set_no_output_symtab_entry();
case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12:
case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12:
case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
+ case elfcpp::R_AARCH64_TLSLE_LDST8_TPREL_LO12:
+ case elfcpp::R_AARCH64_TLSLE_LDST8_TPREL_LO12_NC:
+ case elfcpp::R_AARCH64_TLSLE_LDST16_TPREL_LO12:
+ case elfcpp::R_AARCH64_TLSLE_LDST16_TPREL_LO12_NC:
+ case elfcpp::R_AARCH64_TLSLE_LDST32_TPREL_LO12:
+ case elfcpp::R_AARCH64_TLSLE_LDST32_TPREL_LO12_NC:
+ case elfcpp::R_AARCH64_TLSLE_LDST64_TPREL_LO12:
+ case elfcpp::R_AARCH64_TLSLE_LDST64_TPREL_LO12_NC:
// When we already have Local-Exec, there is nothing further we
// can do.
return tls::TLSOPT_NONE;
case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12:
case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12:
case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
+ case elfcpp::R_AARCH64_TLSLE_LDST8_TPREL_LO12:
+ case elfcpp::R_AARCH64_TLSLE_LDST8_TPREL_LO12_NC:
+ case elfcpp::R_AARCH64_TLSLE_LDST16_TPREL_LO12:
+ case elfcpp::R_AARCH64_TLSLE_LDST16_TPREL_LO12_NC:
+ case elfcpp::R_AARCH64_TLSLE_LDST32_TPREL_LO12:
+ case elfcpp::R_AARCH64_TLSLE_LDST32_TPREL_LO12_NC:
+ case elfcpp::R_AARCH64_TLSLE_LDST64_TPREL_LO12:
+ case elfcpp::R_AARCH64_TLSLE_LDST64_TPREL_LO12_NC:
{
layout->set_has_static_tls();
bool output_is_shared = parameters->options().shared();
gold_error(_("%s: unsupported reloc %u in pos independent link."),
object->name().c_str(), r_type);
}
+ // Make a PLT entry if necessary.
+ if (gsym->needs_plt_entry())
+ {
+ target->make_plt_entry(symtab, layout, gsym);
+ // Since this is not a PC-relative relocation, we may be
+ // taking the address of a function. In that case we need to
+ // set the entry in the dynamic symbol table to the address of
+ // the PLT entry.
+ if (gsym->is_from_dynobj() && !parameters->options().shared())
+ gsym->set_needs_dynsym_value();
+ }
break;
case elfcpp::R_AARCH64_LD_PREL_LO19: // 273
case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12:
case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12:
- case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: // Local executable
+ case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
+ case elfcpp::R_AARCH64_TLSLE_LDST8_TPREL_LO12:
+ case elfcpp::R_AARCH64_TLSLE_LDST8_TPREL_LO12_NC:
+ case elfcpp::R_AARCH64_TLSLE_LDST16_TPREL_LO12:
+ case elfcpp::R_AARCH64_TLSLE_LDST16_TPREL_LO12_NC:
+ case elfcpp::R_AARCH64_TLSLE_LDST32_TPREL_LO12:
+ case elfcpp::R_AARCH64_TLSLE_LDST32_TPREL_LO12_NC:
+ case elfcpp::R_AARCH64_TLSLE_LDST64_TPREL_LO12:
+ case elfcpp::R_AARCH64_TLSLE_LDST64_TPREL_LO12_NC: // Local executable
layout->set_has_static_tls();
if (parameters->options().shared())
gold_error(_("%s: unsupported TLSLE reloc type %u in shared objects."),
}
// Set the size of the _GLOBAL_OFFSET_TABLE_ symbol to the size of
- // the .got.plt section.
+ // the .got section.
Symbol* sym = this->global_offset_table_;
if (sym != NULL)
{
- uint64_t data_size = this->got_plt_->current_data_size();
+ uint64_t data_size = this->got_->current_data_size();
symtab->get_sized_symbol<size>(sym)->set_symsize(data_size);
// If the .got section is more than 0x8000 bytes, we add
case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12:
case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12:
case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
+ case elfcpp::R_AARCH64_TLSLE_LDST8_TPREL_LO12:
+ case elfcpp::R_AARCH64_TLSLE_LDST8_TPREL_LO12_NC:
+ case elfcpp::R_AARCH64_TLSLE_LDST16_TPREL_LO12:
+ case elfcpp::R_AARCH64_TLSLE_LDST16_TPREL_LO12_NC:
+ case elfcpp::R_AARCH64_TLSLE_LDST32_TPREL_LO12:
+ case elfcpp::R_AARCH64_TLSLE_LDST32_TPREL_LO12_NC:
+ case elfcpp::R_AARCH64_TLSLE_LDST64_TPREL_LO12:
+ case elfcpp::R_AARCH64_TLSLE_LDST64_TPREL_LO12_NC:
case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21:
case elfcpp::R_AARCH64_TLSDESC_LD64_LO12:
case elfcpp::R_AARCH64_TLSDESC_ADD_LO12:
case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12:
case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12:
case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
+ case elfcpp::R_AARCH64_TLSLE_LDST8_TPREL_LO12:
+ case elfcpp::R_AARCH64_TLSLE_LDST8_TPREL_LO12_NC:
+ case elfcpp::R_AARCH64_TLSLE_LDST16_TPREL_LO12:
+ case elfcpp::R_AARCH64_TLSLE_LDST16_TPREL_LO12_NC:
+ case elfcpp::R_AARCH64_TLSLE_LDST32_TPREL_LO12:
+ case elfcpp::R_AARCH64_TLSLE_LDST32_TPREL_LO12_NC:
+ case elfcpp::R_AARCH64_TLSLE_LDST64_TPREL_LO12:
+ case elfcpp::R_AARCH64_TLSLE_LDST64_TPREL_LO12_NC:
{
gold_assert(tls_segment != NULL);
AArch64_address value = psymval->value(object, 0);
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