// powerpc.cc -- powerpc target support for gold.
-// Copyright (C) 2008-2015 Free Software Foundation, Inc.
+// Copyright (C) 2008-2016 Free Software Foundation, Inc.
// Written by David S. Miller <davem@davemloft.net>
// and David Edelsohn <edelsohn@gnu.org>
const unsigned char* plocal_symbols,
Relocatable_relocs*);
+ // Scan the relocs for --emit-relocs.
+ void
+ emit_relocs_scan(Symbol_table* symtab,
+ Layout* layout,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int data_shndx,
+ unsigned int sh_type,
+ const unsigned char* prelocs,
+ size_t reloc_count,
+ Output_section* output_section,
+ bool needs_special_offset_handling,
+ size_t local_symbol_count,
+ const unsigned char* plocal_syms,
+ Relocatable_relocs* rr);
+
// Emit relocations for a section.
void
relocate_relocs(const Relocate_info<size, big_endian>*,
}
};
- // A class which returns the size required for a relocation type,
- // used while scanning relocs during a relocatable link.
- class Relocatable_size_for_reloc
- {
- public:
- unsigned int
- get_size_for_reloc(unsigned int, Relobj*)
- {
- gold_unreachable();
- return 0;
- }
- };
-
// Optimize the TLS relocation type based on what we know about the
// symbol. IS_FINAL is true if the final address of this symbol is
// known at link time.
// the stubbed branches.
Stub_control(int32_t size, bool no_size_errors)
: state_(NO_GROUP), stub_group_size_(abs(size)),
- stub14_group_size_(abs(size) >> 10),
stubs_always_before_branch_(size < 0),
- suppress_size_errors_(no_size_errors),
+ suppress_size_errors_(no_size_errors), group_size_(0),
group_end_addr_(0), owner_(NULL), output_section_(NULL)
{
}
State state_;
uint32_t stub_group_size_;
- uint32_t stub14_group_size_;
bool stubs_always_before_branch_;
bool suppress_size_errors_;
+ // Current max size of group. Starts at stub_group_size_ but is
+ // reduced to stub_group_size_/1024 on seeing a section with
+ // external conditional branches.
+ uint32_t group_size_;
uint64_t group_end_addr_;
+ // owner_ and output_section_ specify the section to which stubs are
+ // attached. The stubs are placed at the end of this section.
const Output_section::Input_section* owner_;
Output_section* output_section_;
};
// Return true iff input section can be handled by current stub
-// group.
+// group. Sections are presented to this function in reverse order,
+// so the first section is the tail of the group.
bool
Stub_control::can_add_to_stub_group(Output_section* o,
const Output_section::Input_section* i,
bool has14)
{
- uint32_t group_size
- = has14 ? this->stub14_group_size_ : this->stub_group_size_;
bool whole_sec = o->order() == ORDER_INIT || o->order() == ORDER_FINI;
uint64_t this_size;
uint64_t start_addr = o->address();
start_addr += i->relobj()->output_section_offset(i->shndx());
this_size = i->data_size();
}
- uint64_t end_addr = start_addr + this_size;
- bool toobig = this_size > group_size;
- if (toobig && !this->suppress_size_errors_)
+ uint32_t group_size = this->stub_group_size_;
+ if (has14)
+ this->group_size_ = group_size = group_size >> 10;
+
+ if (this_size > group_size && !this->suppress_size_errors_)
gold_warning(_("%s:%s exceeds group size"),
i->relobj()->name().c_str(),
i->relobj()->section_name(i->shndx()).c_str());
- if (this->state_ != HAS_STUB_SECTION
- && (!whole_sec || this->output_section_ != o)
- && (this->state_ == NO_GROUP
- || this->group_end_addr_ - end_addr < group_size))
- {
- this->owner_ = i;
- this->output_section_ = o;
- }
+ gold_debug(DEBUG_TARGET, "maybe add%s %s:%s size=%#llx total=%#llx",
+ has14 ? " 14bit" : "",
+ i->relobj()->name().c_str(),
+ i->relobj()->section_name(i->shndx()).c_str(),
+ (long long) this_size,
+ (long long) this->group_end_addr_ - start_addr);
- if (this->state_ == NO_GROUP)
- {
- this->state_ = FINDING_STUB_SECTION;
- this->group_end_addr_ = end_addr;
- }
- else if (this->group_end_addr_ - start_addr < group_size)
- ;
- // Adding this section would make the group larger than GROUP_SIZE.
- else if (this->state_ == FINDING_STUB_SECTION
- && !this->stubs_always_before_branch_
- && !toobig)
+ uint64_t end_addr = start_addr + this_size;
+ if (this->state_ == HAS_STUB_SECTION)
{
- // But wait, there's more! Input sections up to GROUP_SIZE
- // bytes before the stub table can be handled by it too.
- this->state_ = HAS_STUB_SECTION;
- this->group_end_addr_ = end_addr;
+ // Can we add this section, which is before the stubs, to the
+ // group?
+ if (this->group_end_addr_ - start_addr <= this->group_size_)
+ return true;
}
else
{
- this->state_ = NO_GROUP;
- return false;
+ // Stubs are added at the end of "owner_".
+ // The current section can always be the stub owner, except when
+ // whole_sec is true and the current section isn't the last of
+ // the pasted sections. (This restriction for the whole_sec
+ // case is just to simplify the corner case mentioned in
+ // group_sections.)
+ // Note that "owner_" itself is not necessarily part of the
+ // group of sections served by these stubs!
+ if (!whole_sec || this->output_section_ != o)
+ {
+ this->owner_ = i;
+ this->output_section_ = o;
+ }
+
+ if (this->state_ == FINDING_STUB_SECTION)
+ {
+ if (this->group_end_addr_ - start_addr <= this->group_size_)
+ return true;
+ // The group after the stubs has reached maximum size.
+ // Now see about adding sections before the stubs to the
+ // group. If the current section has a 14-bit branch and
+ // the group after the stubs exceeds group_size_ (because
+ // they didn't have 14-bit branches), don't add sections
+ // before the stubs: The size of stubs for such a large
+ // group may exceed the reach of a 14-bit branch.
+ if (!this->stubs_always_before_branch_
+ && this_size <= this->group_size_
+ && this->group_end_addr_ - end_addr <= this->group_size_)
+ {
+ gold_debug(DEBUG_TARGET, "adding before stubs");
+ this->state_ = HAS_STUB_SECTION;
+ this->group_end_addr_ = end_addr;
+ return true;
+ }
+ }
+ else if (this->state_ == NO_GROUP)
+ {
+ // Only here on very first use of Stub_control
+ this->state_ = FINDING_STUB_SECTION;
+ this->group_size_ = group_size;
+ this->group_end_addr_ = end_addr;
+ return true;
+ }
+ else
+ gold_unreachable();
}
- return true;
+
+ gold_debug(DEBUG_TARGET, "nope, didn't fit\n");
+
+ // The section fails to fit in the current group. Set up a few
+ // things for the next group. owner_ and output_section_ will be
+ // set later after we've retrieved those values for the current
+ // group.
+ this->state_ = FINDING_STUB_SECTION;
+ this->group_size_ = group_size;
+ this->group_end_addr_ = end_addr;
+ return false;
}
// Look over all the input sections, deciding where to place stubs.
}
this->stub_tables_.clear();
this->stub_group_size_ = this->stub_group_size_ / 4 * 3;
- gold_info(_("%s: stub group size is too large; retrying with %d"),
+ gold_info(_("%s: stub group size is too large; retrying with %#x"),
program_name, this->stub_group_size_);
this->group_sections(layout, task, true);
}
Stub_table<size, big_endian>* stub_table
= static_cast<Stub_table<size, big_endian>*>(
i->relaxed_input_section());
- off += stub_table->set_address_and_size(os, off);
+ Address stub_table_size = stub_table->set_address_and_size(os, off);
+ off += stub_table_size;
+ // After a few iterations, set current stub table size
+ // as min size threshold, so later stub tables can only
+ // grow in size.
+ if (pass >= 4)
+ stub_table->set_min_size_threshold(stub_table_size);
}
else
off += i->data_size();
targ_(targ), plt_call_stubs_(), long_branch_stubs_(),
orig_data_size_(owner->current_data_size()),
plt_size_(0), last_plt_size_(0),
- branch_size_(0), last_branch_size_(0), eh_frame_added_(false),
- need_save_res_(false)
+ branch_size_(0), last_branch_size_(0), min_size_threshold_(0),
+ eh_frame_added_(false), need_save_res_(false)
{
this->set_output_section(output_section);
off = align_address(off, this->stub_align());
// Include original section size and alignment padding in size
my_size += off - start_off;
+ // Ensure new size is always larger than min size
+ // threshold. Alignment requirement is included in "my_size", so
+ // increase "my_size" does not invalidate alignment.
+ if (my_size < this->min_size_threshold_)
+ my_size = this->min_size_threshold_;
this->reset_address_and_file_offset();
this->set_current_data_size(my_size);
this->set_address_and_file_offset(os->address() + start_off,
plt_size() const
{ return this->plt_size_; }
+ void set_min_size_threshold(Address min_size)
+ { this->min_size_threshold_ = min_size; }
+
bool
size_update()
{
section_size_type orig_data_size_;
// size of stubs
section_size_type plt_size_, last_plt_size_, branch_size_, last_branch_size_;
+ // Some rare cases cause (PR/20529) fluctuation in stub table
+ // size, which leads to an endless relax loop. This is to be fixed
+ // by, after the first few iterations, allowing only increase of
+ // stub table size. This variable sets the minimal possible size of
+ // a stub table, it is zero for the first few iterations, then
+ // increases monotonically.
+ Address min_size_threshold_;
// Whether .eh_frame info has been created for this stub section.
bool eh_frame_added_;
// Set if this stub group needs a copy of out-of-line register
ppc_object->set_opd_discard(reloc.get_r_offset());
break;
}
- // Fall thru
+ // Fall through.
case elfcpp::R_PPC64_UADDR64:
case elfcpp::R_POWERPC_ADDR32:
case elfcpp::R_POWERPC_UADDR32:
|| gsym->is_preemptible())))
target->make_plt_entry(symtab, layout, gsym);
}
- // Fall thru
+ // Fall through.
case elfcpp::R_PPC64_REL64:
case elfcpp::R_POWERPC_REL32:
const unsigned char* plocal_symbols)
{
typedef Target_powerpc<size, big_endian> Powerpc;
- typedef typename Target_powerpc<size, big_endian>::Scan Scan;
+ typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
+ Classify_reloc;
+
Powerpc_relobj<size, big_endian>* ppc_object
= static_cast<Powerpc_relobj<size, big_endian>*>(object);
if (size == 64)
return;
}
- gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan,
- typename Target_powerpc::Relocatable_size_for_reloc>(
+ gold::gc_process_relocs<size, big_endian, Powerpc, Scan, Classify_reloc>(
symtab,
layout,
this,
const unsigned char* plocal_symbols)
{
typedef Target_powerpc<size, big_endian> Powerpc;
- typedef typename Target_powerpc<size, big_endian>::Scan Scan;
+ typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
+ Classify_reloc;
if (sh_type == elfcpp::SHT_REL)
{
return;
}
- gold::scan_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan>(
+ gold::scan_relocs<size, big_endian, Powerpc, Scan, Classify_reloc>(
symtab,
layout,
this,
if (size != 64)
// R_PPC_TLSGD, R_PPC_TLSLD, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HI
break;
+ // Fall through.
case elfcpp::R_POWERPC_TPREL16:
case elfcpp::R_POWERPC_TPREL16_LO:
case elfcpp::R_POWERPC_TPREL16_HI:
// R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16, R_PPC_EMB_NADDR16_LO
// R_PPC_EMB_NADDR16_HI, R_PPC_EMB_NADDR16_HA, R_PPC_EMB_SDAI16
break;
+ // Fall through.
case elfcpp::R_POWERPC_DTPREL16:
case elfcpp::R_POWERPC_DTPREL16_LO:
case elfcpp::R_POWERPC_DTPREL16_HI:
case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
case elfcpp::R_POWERPC_REL14_BRTAKEN:
branch_bit = 1 << 21;
+ // Fall through.
case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
case elfcpp::R_POWERPC_REL14_BRNTAKEN:
{
&& preloc != NULL
&& target->abiversion() >= 2
&& !parameters->options().output_is_position_independent()
+ && rela.get_r_addend() == d_offset + 4
&& gsym != NULL
&& strcmp(gsym->name(), ".TOC.") == 0)
{
maybe_dq_reloc = true;
break;
}
+ // Fall through.
case elfcpp::R_POWERPC_ADDR16:
case elfcpp::R_POWERPC_REL16:
case elfcpp::R_PPC64_TOC16:
if (size == 32)
// R_PPC_EMB_MRKREF, R_PPC_EMB_RELST_LO, R_PPC_EMB_RELST_HA
goto unsupp;
+ // Fall through.
case elfcpp::R_POWERPC_ADDR16_HI:
case elfcpp::R_POWERPC_REL16_HI:
case elfcpp::R_PPC64_TOC16_HI:
if (size == 32)
// R_PPC_EMB_RELSEC16, R_PPC_EMB_RELST_HI, R_PPC_EMB_BIT_FLD
goto unsupp;
+ // Fall through.
case elfcpp::R_POWERPC_ADDR16_HA:
case elfcpp::R_POWERPC_REL16_HA:
case elfcpp::R_PPC64_TOC16_HA:
if (size == 32)
// R_PPC_EMB_NADDR16_LO
goto unsupp;
+ // Fall through.
case elfcpp::R_PPC64_ADDR16_HIGHER:
case elfcpp::R_PPC64_TPREL16_HIGHER:
Reloc::addr16_hi2(view, value);
if (size == 32)
// R_PPC_EMB_NADDR16_HI
goto unsupp;
+ // Fall through.
case elfcpp::R_PPC64_ADDR16_HIGHERA:
case elfcpp::R_PPC64_TPREL16_HIGHERA:
Reloc::addr16_ha2(view, value);
if (size == 32)
// R_PPC_EMB_NADDR16_HA
goto unsupp;
+ // Fall through.
case elfcpp::R_PPC64_ADDR16_HIGHEST:
case elfcpp::R_PPC64_TPREL16_HIGHEST:
Reloc::addr16_hi3(view, value);
if (size == 32)
// R_PPC_EMB_SDAI16
goto unsupp;
+ // Fall through.
case elfcpp::R_PPC64_ADDR16_HIGHESTA:
case elfcpp::R_PPC64_TPREL16_HIGHESTA:
Reloc::addr16_ha3(view, value);
if (size == 32)
// R_PPC_EMB_NADDR32, R_PPC_EMB_NADDR16
goto unsupp;
+ // Fall through.
case elfcpp::R_PPC64_TPREL16_DS:
case elfcpp::R_PPC64_TPREL16_LO_DS:
if (size == 32)
// R_PPC_TLSGD, R_PPC_TLSLD
break;
+ // Fall through.
case elfcpp::R_PPC64_ADDR16_DS:
case elfcpp::R_PPC64_ADDR16_LO_DS:
case elfcpp::R_PPC64_TOC16_DS:
typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate;
typedef typename Target_powerpc<size, big_endian>::Relocate_comdat_behavior
Powerpc_comdat_behavior;
+ typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
+ Classify_reloc;
gold_assert(sh_type == elfcpp::SHT_RELA);
- gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA,
- Powerpc_relocate, Powerpc_comdat_behavior>(
+ gold::relocate_section<size, big_endian, Powerpc, Powerpc_relocate,
+ Powerpc_comdat_behavior, Classify_reloc>(
relinfo,
this,
prelocs,
reloc_symbol_changes);
}
+template<int size, bool big_endian>
class Powerpc_scan_relocatable_reloc
{
public:
+ typedef typename Reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc
+ Reltype;
+ static const int reloc_size =
+ Reloc_types<elfcpp::SHT_RELA, size, big_endian>::reloc_size;
+ static const int sh_type = elfcpp::SHT_RELA;
+
+ // Return the symbol referred to by the relocation.
+ static inline unsigned int
+ get_r_sym(const Reltype* reloc)
+ { return elfcpp::elf_r_sym<size>(reloc->get_r_info()); }
+
+ // Return the type of the relocation.
+ static inline unsigned int
+ get_r_type(const Reltype* reloc)
+ { return elfcpp::elf_r_type<size>(reloc->get_r_info()); }
+
// Return the strategy to use for a local symbol which is not a
// section symbol, given the relocation type.
inline Relocatable_relocs::Reloc_strategy
const unsigned char* plocal_symbols,
Relocatable_relocs* rr)
{
+ typedef Powerpc_scan_relocatable_reloc<size, big_endian> Scan_strategy;
+
gold_assert(sh_type == elfcpp::SHT_RELA);
- gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA,
- Powerpc_scan_relocatable_reloc>(
+ gold::scan_relocatable_relocs<size, big_endian, Scan_strategy>(
symtab,
layout,
object,
rr);
}
+// Scan the relocs for --emit-relocs.
+
+template<int size, bool big_endian>
+void
+Target_powerpc<size, big_endian>::emit_relocs_scan(
+ Symbol_table* symtab,
+ Layout* layout,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int data_shndx,
+ unsigned int sh_type,
+ const unsigned char* prelocs,
+ size_t reloc_count,
+ Output_section* output_section,
+ bool needs_special_offset_handling,
+ size_t local_symbol_count,
+ const unsigned char* plocal_syms,
+ Relocatable_relocs* rr)
+{
+ typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
+ Classify_reloc;
+ typedef gold::Default_emit_relocs_strategy<Classify_reloc>
+ Emit_relocs_strategy;
+
+ gold_assert(sh_type == elfcpp::SHT_RELA);
+
+ gold::scan_relocatable_relocs<size, big_endian, Emit_relocs_strategy>(
+ symtab,
+ layout,
+ object,
+ data_shndx,
+ prelocs,
+ reloc_count,
+ output_section,
+ needs_special_offset_handling,
+ local_symbol_count,
+ plocal_syms,
+ rr);
+}
+
// Emit relocations for a section.
// This is a modified version of the function by the same name in
// target-reloc.h. Using relocate_special_relocatable for
projects / deliverable / binutils-gdb.git / blobdiff