// sparc.cc -- sparc target support for gold.
-// Copyright 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
+// Copyright (C) 2008-2020 Free Software Foundation, Inc.
// Written by David S. Miller <davem@davemloft.net>.
// This file is part of gold.
Target_sparc()
: Sized_target<size, big_endian>(&sparc_info),
got_(NULL), plt_(NULL), rela_dyn_(NULL), rela_ifunc_(NULL),
- copy_relocs_(elfcpp::R_SPARC_COPY), dynbss_(NULL),
+ copy_relocs_(elfcpp::R_SPARC_COPY),
got_mod_index_offset_(-1U), tls_get_addr_sym_(NULL),
elf_machine_(sparc_info.machine_code), elf_flags_(0),
- elf_flags_set_(false)
+ elf_flags_set_(false), register_syms_()
{
}
- // Process the relocations to determine unreferenced sections for
+ // Make a new symbol table entry.
+ Sized_symbol<size>*
+ make_symbol(const char*, elfcpp::STT, Object*, unsigned int, uint64_t);
+
+ // Process the relocations to determine unreferenced sections for
// garbage collection.
void
gc_process_relocs(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_symbols);
+ 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_symbols);
// Scan the relocations to look for symbol adjustments.
void
const unsigned char* plocal_symbols,
Relocatable_relocs*);
- // Relocate a section during a relocatable link.
+ // Scan the relocs for --emit-relocs.
void
- relocate_for_relocatable(const Relocate_info<size, big_endian>*,
- unsigned int sh_type,
- const unsigned char* prelocs,
- size_t reloc_count,
- Output_section* output_section,
- off_t offset_in_output_section,
- const Relocatable_relocs*,
- unsigned char* view,
- typename elfcpp::Elf_types<size>::Elf_Addr view_address,
- section_size_type view_size,
- unsigned char* reloc_view,
- section_size_type reloc_view_size);
+ 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>*,
+ unsigned int sh_type,
+ const unsigned char* prelocs,
+ size_t reloc_count,
+ Output_section* output_section,
+ typename elfcpp::Elf_types<size>::Elf_Off
+ offset_in_output_section,
+ unsigned char* view,
+ typename elfcpp::Elf_types<size>::Elf_Addr view_address,
+ section_size_type view_size,
+ unsigned char* reloc_view,
+ section_size_type reloc_view_size);
+
// Return whether SYM is defined by the ABI.
bool
do_is_defined_by_abi(const Symbol* sym) const
- {
- // XXX Really need to support this better...
- if (sym->type() == elfcpp::STT_SPARC_REGISTER)
- return 1;
-
- return strcmp(sym->name(), "___tls_get_addr") == 0;
- }
+ { return strcmp(sym->name(), "___tls_get_addr") == 0; }
// Return the PLT address to use for a global symbol.
uint64_t
const elfcpp::Ehdr<size, big_endian>& ehdr);
void
- do_adjust_elf_header(unsigned char* view, int len) const;
+ do_adjust_elf_header(unsigned char* view, int len);
private:
unsigned int data_shndx,
Output_section* output_section,
const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
- const elfcpp::Sym<size, big_endian>& lsym);
+ const elfcpp::Sym<size, big_endian>& lsym,
+ bool is_discarded);
inline void
global(Symbol_table* symtab, Layout* layout, Target_sparc* target,
inline bool
local_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
- Target_sparc* ,
- Sized_relobj_file<size, big_endian>* ,
- unsigned int ,
- Output_section* ,
- const elfcpp::Rela<size, big_endian>& ,
+ Target_sparc* ,
+ Sized_relobj_file<size, big_endian>* ,
+ unsigned int ,
+ Output_section* ,
+ const elfcpp::Rela<size, big_endian>& ,
unsigned int ,
- const elfcpp::Sym<size, big_endian>&)
+ const elfcpp::Sym<size, big_endian>&)
{ return false; }
inline bool
global_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
- Target_sparc* ,
- Sized_relobj_file<size, big_endian>* ,
- unsigned int ,
- Output_section* ,
- const elfcpp::Rela<size,
- big_endian>& ,
- unsigned int , Symbol*)
+ Target_sparc* ,
+ Sized_relobj_file<size, big_endian>* ,
+ unsigned int ,
+ Output_section* ,
+ const elfcpp::Rela<size,
+ big_endian>& ,
+ unsigned int , Symbol*)
{ return false; }
// Do a relocation. Return false if the caller should not issue
// any warnings about this relocation.
inline bool
- relocate(const Relocate_info<size, big_endian>*, Target_sparc*,
- Output_section*, size_t relnum,
- const elfcpp::Rela<size, big_endian>&,
- unsigned int r_type, const Sized_symbol<size>*,
- const Symbol_value<size>*,
- unsigned char*,
- typename elfcpp::Elf_types<size>::Elf_Addr,
+ relocate(const Relocate_info<size, big_endian>*, unsigned int,
+ Target_sparc*, Output_section*, size_t, const unsigned char*,
+ const Sized_symbol<size>*, const Symbol_value<size>*,
+ unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr,
section_size_type);
private:
// Do a TLS relocation.
inline void
relocate_tls(const Relocate_info<size, big_endian>*, Target_sparc* target,
- size_t relnum, const elfcpp::Rela<size, big_endian>&,
+ size_t relnum, const elfcpp::Rela<size, big_endian>&,
unsigned int r_type, const Sized_symbol<size>*,
const Symbol_value<size>*,
unsigned char*,
unsigned char *reloc_adjust_addr_;
};
- // 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*);
- };
-
// Get the GOT section, creating it if necessary.
Output_data_got<size, big_endian>*
got_section(Symbol_table*, Layout*);
// Copy a relocation against a global symbol.
void
copy_reloc(Symbol_table* symtab, Layout* layout,
- Sized_relobj_file<size, big_endian>* object,
+ Sized_relobj_file<size, big_endian>* object,
unsigned int shndx, Output_section* output_section,
Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc)
{
+ unsigned int r_type = elfcpp::elf_r_type<size>(reloc.get_r_info());
this->copy_relocs_.copy_reloc(symtab, layout,
symtab->get_sized_symbol<size>(sym),
object, shndx, output_section,
- reloc, this->rela_dyn_section(layout));
+ r_type, reloc.get_r_offset(),
+ reloc.get_r_addend(),
+ this->rela_dyn_section(layout));
}
// Information about this specific target which we pass to the
GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair
};
+ struct Register_symbol
+ {
+ Register_symbol()
+ : name(NULL), shndx(0), obj(NULL)
+ { }
+ const char* name;
+ unsigned int shndx;
+ Object* obj;
+ };
+
// The GOT section.
Output_data_got<size, big_endian>* got_;
// The PLT section.
Reloc_section* rela_ifunc_;
// Relocs saved to avoid a COPY reloc.
Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_;
- // Space for variables copied with a COPY reloc.
- Output_data_space* dynbss_;
// Offset of the GOT entry for the TLS module index;
unsigned int got_mod_index_offset_;
// Cached pointer to __tls_get_addr symbol
elfcpp::Elf_Word elf_flags_;
// Whether elf_flags_ has been set for the first time yet
bool elf_flags_set_;
+ // STT_SPARC_REGISTER symbols (%g2, %g3, %g6, %g7).
+ Register_symbol register_syms_[4];
};
template<>
0x00010000, // default_text_segment_address
64 * 1024, // abi_pagesize (overridable by -z max-page-size)
8 * 1024, // common_pagesize (overridable by -z common-page-size)
+ false, // isolate_execinstr
+ 0, // rosegment_gap
elfcpp::SHN_UNDEF, // small_common_shndx
elfcpp::SHN_UNDEF, // large_common_shndx
0, // small_common_section_flags
0, // large_common_section_flags
NULL, // attributes_section
- NULL // attributes_vendor
+ NULL, // attributes_vendor
+ "_start", // entry_symbol_name
+ 32, // hash_entry_size
+ elfcpp::SHT_PROGBITS, // unwind_section_type
};
template<>
64, // size
true, // is_big_endian
elfcpp::EM_SPARCV9, // machine_code
- false, // has_make_symbol
+ true, // has_make_symbol
false, // has_resolve
false, // has_code_fill
true, // is_default_stack_executable
0x100000, // default_text_segment_address
64 * 1024, // abi_pagesize (overridable by -z max-page-size)
8 * 1024, // common_pagesize (overridable by -z common-page-size)
+ false, // isolate_execinstr
+ 0, // rosegment_gap
elfcpp::SHN_UNDEF, // small_common_shndx
elfcpp::SHN_UNDEF, // large_common_shndx
0, // small_common_section_flags
0, // large_common_section_flags
NULL, // attributes_section
- NULL // attributes_vendor
+ NULL, // attributes_vendor
+ "_start", // entry_symbol_name
+ 32, // hash_entry_size
+ elfcpp::SHT_PROGBITS, // unwind_section_type
};
// We have to take care here, even when operating in little-endian
// R_SPARC_GOTDATA_OP_HIX22: @gdopoff(Symbol + Addend) >> 10
static inline void
gdop_hix22(unsigned char* view,
- typename elfcpp::Elf_types<size>::Elf_Addr value,
- typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ typename elfcpp::Elf_types<size>::Elf_Addr value)
{
typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
Valtype* wv = reinterpret_cast<Valtype*>(view);
Valtype val = elfcpp::Swap<32, true>::readval(wv);
- int32_t reloc = static_cast<int32_t>(value + addend);
+ int32_t reloc = static_cast<int32_t>(value);
val &= ~0x3fffff;
// R_SPARC_GOTDATA_OP_LOX10: (@gdopoff(Symbol + Addend) & 0x3ff) | 0x1c00
static inline void
gdop_lox10(unsigned char* view,
- typename elfcpp::Elf_types<size>::Elf_Addr value,
- typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ typename elfcpp::Elf_types<size>::Elf_Addr value)
{
typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
Valtype* wv = reinterpret_cast<Valtype*>(view);
Valtype val = elfcpp::Swap<32, true>::readval(wv);
- int32_t reloc = static_cast<int32_t>(value + addend);
+ int32_t reloc = static_cast<int32_t>(value);
if (reloc < 0)
reloc = (reloc & 0x3ff) | 0x1c00;
if (gsym->type() == elfcpp::STT_GNU_IFUNC
&& gsym->can_use_relative_reloc(false))
offset = plt_index_to_offset(this->count_ + 4);
- return this->address() + offset;
+ return this->address() + offset + gsym->plt_offset();
}
// Return the PLT address to use for a local symbol. These are always
template<int size, bool big_endian>
uint64_t
Output_data_plt_sparc<size, big_endian>::address_for_local(
- const Relobj*,
- unsigned int)
+ const Relobj* object,
+ unsigned int r_sym)
{
- return this->address() + plt_index_to_offset(this->count_ + 4);
+ return (this->address()
+ + plt_index_to_offset(this->count_ + 4)
+ + object->local_plt_offset(r_sym));
}
static const unsigned int sparc_nop = 0x01000000;
case elfcpp::R_SPARC_RELATIVE:
case elfcpp::R_SPARC_IRELATIVE:
case elfcpp::R_SPARC_COPY:
+ case elfcpp::R_SPARC_32:
case elfcpp::R_SPARC_64:
case elfcpp::R_SPARC_GLOB_DAT:
case elfcpp::R_SPARC_JMP_SLOT:
int flags = Scan::get_reference_flags(r_type);
if (flags & Symbol::TLS_REF)
gold_error(_("%s: unsupported TLS reloc %u for IFUNC symbol"),
- object->name().c_str(), r_type);
+ object->name().c_str(), r_type);
return flags != 0;
}
Output_section* output_section,
const elfcpp::Rela<size, big_endian>& reloc,
unsigned int r_type,
- const elfcpp::Sym<size, big_endian>& lsym)
+ const elfcpp::Sym<size, big_endian>& lsym,
+ bool is_discarded)
{
+ if (is_discarded)
+ return;
+
bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC;
unsigned int orig_r_type = r_type;
r_type &= 0xff;
// apply the link-time value, so we flag the location with
// an R_SPARC_RELATIVE relocation so the dynamic loader can
// relocate it easily.
- if (parameters->options().output_is_position_independent())
- {
- Reloc_section* rela_dyn = target->rela_dyn_section(layout);
- unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
- rela_dyn->add_local_relative(object, r_sym, elfcpp::R_SPARC_RELATIVE,
+ if (parameters->options().output_is_position_independent()
+ && ((size == 64 && r_type == elfcpp::R_SPARC_64)
+ || (size == 32 && r_type == elfcpp::R_SPARC_32)))
+ {
+ Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+ unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
+ rela_dyn->add_local_relative(object, r_sym, elfcpp::R_SPARC_RELATIVE,
output_section, data_shndx,
reloc.get_r_offset(),
reloc.get_r_addend(), is_ifunc);
- }
- break;
+ break;
+ }
+ // Fall through.
case elfcpp::R_SPARC_HIX22:
case elfcpp::R_SPARC_LOX10:
// executable), we need to create a dynamic relocation for
// this location.
if (parameters->options().output_is_position_independent())
- {
- Reloc_section* rela_dyn = target->rela_dyn_section(layout);
- unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
+ {
+ Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+ unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
check_non_pic(object, r_type);
- if (lsym.get_st_type() != elfcpp::STT_SECTION)
- {
- rela_dyn->add_local(object, r_sym, orig_r_type, output_section,
+ if (lsym.get_st_type() != elfcpp::STT_SECTION)
+ {
+ rela_dyn->add_local(object, r_sym, orig_r_type, output_section,
data_shndx, reloc.get_r_offset(),
reloc.get_r_addend());
- }
- else
- {
- gold_assert(lsym.get_st_value() == 0);
+ }
+ else
+ {
+ gold_assert(lsym.get_st_value() == 0);
rela_dyn->add_symbolless_local_addend(object, r_sym, orig_r_type,
output_section, data_shndx,
reloc.get_r_offset(),
reloc.get_r_addend());
- }
- }
+ }
+ }
break;
case elfcpp::R_SPARC_WDISP30:
case elfcpp::R_SPARC_GOT13:
case elfcpp::R_SPARC_GOT22:
{
- // The symbol requires a GOT entry.
- Output_data_got<size, big_endian>* got;
- unsigned int r_sym;
+ // The symbol requires a GOT entry.
+ Output_data_got<size, big_endian>* got;
+ unsigned int r_sym;
got = target->got_section(symtab, layout);
r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
{
bool output_is_shared = parameters->options().shared();
const tls::Tls_optimization optimized_type
- = optimize_tls_reloc(!output_is_shared, r_type);
+ = optimize_tls_reloc(!output_is_shared, r_type);
switch (r_type)
{
case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
case elfcpp::R_SPARC_TLS_GD_CALL:
if (optimized_type == tls::TLSOPT_NONE)
{
- // Create a pair of GOT entries for the module index and
- // dtv-relative offset.
- Output_data_got<size, big_endian>* got
- = target->got_section(symtab, layout);
- unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
+ // Create a pair of GOT entries for the module index and
+ // dtv-relative offset.
+ Output_data_got<size, big_endian>* got
+ = target->got_section(symtab, layout);
+ unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
unsigned int shndx = lsym.get_st_shndx();
bool is_ordinary;
shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
object->error(_("local symbol %u has bad shndx %u"),
r_sym, shndx);
else
- got->add_local_pair_with_rel(object, r_sym,
+ got->add_local_pair_with_rel(object, r_sym,
lsym.get_st_shndx(),
GOT_TYPE_TLS_PAIR,
target->rela_dyn_section(layout),
(size == 64
? elfcpp::R_SPARC_TLS_DTPMOD64
- : elfcpp::R_SPARC_TLS_DTPMOD32),
- 0);
+ : elfcpp::R_SPARC_TLS_DTPMOD32));
if (r_type == elfcpp::R_SPARC_TLS_GD_CALL)
generate_tls_call(symtab, layout, target);
}
layout->set_has_static_tls();
if (output_is_shared)
{
- // We need to create a dynamic relocation.
- gold_assert(lsym.get_st_type() != elfcpp::STT_SECTION);
- unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
- Reloc_section* rela_dyn = target->rela_dyn_section(layout);
- rela_dyn->add_symbolless_local_addend(object, r_sym, r_type,
+ // We need to create a dynamic relocation.
+ gold_assert(lsym.get_st_type() != elfcpp::STT_SECTION);
+ unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
+ Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+ rela_dyn->add_symbolless_local_addend(object, r_sym, r_type,
output_section, data_shndx,
reloc.get_r_offset(), 0);
}
// if the symbol is defined in the output file and is protected
// or hidden.
if (gsym->is_defined()
- && !gsym->is_from_dynobj()
- && !gsym->is_preemptible())
+ && !gsym->is_from_dynobj()
+ && !gsym->is_preemptible())
break;
target->make_plt_entry(symtab, layout, gsym);
break;
// Make a dynamic relocation if necessary.
if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type)))
{
- if (gsym->may_need_copy_reloc())
+ if (parameters->options().output_is_executable()
+ && gsym->may_need_copy_reloc())
{
target->copy_reloc(symtab, layout, object,
data_shndx, output_section, gsym,
case elfcpp::R_SPARC_6:
case elfcpp::R_SPARC_5:
{
- // 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();
- }
- // Make a dynamic relocation if necessary.
- if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(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();
+ }
+ // Make a dynamic relocation if necessary.
+ if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type)))
+ {
unsigned int r_off = reloc.get_r_offset();
// The assembler can sometimes emit unaligned relocations
- // for dwarf2 cfi directives.
+ // for dwarf2 cfi directives.
switch (r_type)
{
case elfcpp::R_SPARC_16:
break;
}
- if (gsym->may_need_copy_reloc())
- {
- target->copy_reloc(symtab, layout, object,
- data_shndx, output_section, gsym, reloc);
- }
+ if (!parameters->options().output_is_position_independent()
+ && gsym->may_need_copy_reloc())
+ {
+ target->copy_reloc(symtab, layout, object,
+ data_shndx, output_section, gsym, reloc);
+ }
else if (((size == 64 && r_type == elfcpp::R_SPARC_64)
|| (size == 32 && r_type == elfcpp::R_SPARC_32))
&& gsym->type() == elfcpp::STT_GNU_IFUNC
reloc.get_r_offset(),
reloc.get_r_addend());
}
- else if ((r_type == elfcpp::R_SPARC_32
- || r_type == elfcpp::R_SPARC_64)
- && gsym->can_use_relative_reloc(false))
- {
- Reloc_section* rela_dyn = target->rela_dyn_section(layout);
- rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE,
+ else if (((size == 64 && r_type == elfcpp::R_SPARC_64)
+ || (size == 32 && r_type == elfcpp::R_SPARC_32))
+ && gsym->can_use_relative_reloc(false))
+ {
+ Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+ rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE,
output_section, object,
data_shndx, reloc.get_r_offset(),
reloc.get_r_addend(), is_ifunc);
- }
- else
- {
- Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+ }
+ else
+ {
+ Reloc_section* rela_dyn = target->rela_dyn_section(layout);
check_non_pic(object, r_type);
if (gsym->is_from_dynobj()
object, data_shndx,
reloc.get_r_offset(),
reloc.get_r_addend());
- }
- }
+ }
+ }
}
break;
case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
if (gsym->is_defined()
- && !gsym->is_from_dynobj()
- && !gsym->is_preemptible()
+ && !gsym->is_from_dynobj()
+ && !gsym->is_preemptible()
&& !is_ifunc)
{
// We will optimize this into a GOT relative relocation
// and code transform the GOT load into an addition.
break;
}
+ // Fall through.
case elfcpp::R_SPARC_GOT10:
case elfcpp::R_SPARC_GOT13:
case elfcpp::R_SPARC_GOT22:
{
- // The symbol requires a GOT entry.
- Output_data_got<size, big_endian>* got;
+ // The symbol requires a GOT entry.
+ Output_data_got<size, big_endian>* got;
got = target->got_section(symtab, layout);
- if (gsym->final_value_is_known())
+ if (gsym->final_value_is_known())
{
// For a STT_GNU_IFUNC symbol we want the PLT address.
if (gsym->type() == elfcpp::STT_GNU_IFUNC)
else
got->add_global(gsym, GOT_TYPE_STANDARD);
}
- else
- {
- // If this symbol is not fully resolved, we need to add a
- // GOT entry with a dynamic relocation.
+ else
+ {
+ // If this symbol is not fully resolved, we need to add a
+ // GOT entry with a dynamic relocation.
bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC;
// Use a GLOB_DAT rather than a RELATIVE reloc if:
//
// 3) This is a STT_GNU_IFUNC symbol in position dependent
// code, again so that function address comparisons work.
- Reloc_section* rela_dyn = target->rela_dyn_section(layout);
- if (gsym->is_from_dynobj()
- || gsym->is_undefined()
- || gsym->is_preemptible()
+ Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+ if (gsym->is_from_dynobj()
+ || gsym->is_undefined()
+ || gsym->is_preemptible()
|| (gsym->visibility() == elfcpp::STV_PROTECTED
&& parameters->options().shared())
|| (gsym->type() == elfcpp::STT_GNU_IFUNC
got->add_global_with_rel(gsym, GOT_TYPE_STANDARD, rela_dyn,
r_type);
}
- else if (!gsym->has_got_offset(GOT_TYPE_STANDARD))
- {
+ else if (!gsym->has_got_offset(GOT_TYPE_STANDARD))
+ {
unsigned int off = got->add_constant(0);
gsym->set_got_offset(GOT_TYPE_STANDARD, off);
rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE,
got, off, 0, is_ifunc);
}
- }
+ }
}
break;
{
const bool is_final = gsym->final_value_is_known();
const tls::Tls_optimization optimized_type
- = optimize_tls_reloc(is_final, r_type);
+ = optimize_tls_reloc(is_final, r_type);
switch (r_type)
{
case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
case elfcpp::R_SPARC_TLS_GD_CALL:
if (optimized_type == tls::TLSOPT_NONE)
{
- // Create a pair of GOT entries for the module index and
- // dtv-relative offset.
- Output_data_got<size, big_endian>* got
- = target->got_section(symtab, layout);
- got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_PAIR,
+ // Create a pair of GOT entries for the module index and
+ // dtv-relative offset.
+ Output_data_got<size, big_endian>* got
+ = target->got_section(symtab, layout);
+ got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_PAIR,
target->rela_dyn_section(layout),
(size == 64
? elfcpp::R_SPARC_TLS_DTPMOD64
}
else if (optimized_type == tls::TLSOPT_TO_IE)
{
- // Create a GOT entry for the tp-relative offset.
- Output_data_got<size, big_endian>* got
- = target->got_section(symtab, layout);
- got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET,
+ // Create a GOT entry for the tp-relative offset.
+ Output_data_got<size, big_endian>* got
+ = target->got_section(symtab, layout);
+ got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET,
target->rela_dyn_section(layout),
(size == 64 ?
elfcpp::R_SPARC_TLS_TPOFF64 :
}
}
+// Make a new symbol table entry.
+// STT_SPARC_REGISTER symbols require special handling,
+// so we intercept these symbols and keep track of them separately.
+// We will resolve register symbols here and output them at symbol
+// finalization time.
+
+template<int size, bool big_endian>
+Sized_symbol<size>*
+Target_sparc<size, big_endian>::make_symbol(const char* name,
+ elfcpp::STT type,
+ Object* object,
+ unsigned int shndx,
+ uint64_t value)
+{
+ // REGISTER symbols are used only on SPARC-64.
+ if (size == 64 && type == elfcpp::STT_SPARC_REGISTER)
+ {
+ // Ignore REGISTER symbols in dynamic objects.
+ if (object->is_dynamic())
+ return NULL;
+ // Only registers 2, 3, 6, and 7 can be declared global.
+ int reg = value;
+ switch (reg)
+ {
+ case 2: case 3:
+ reg -= 2;
+ break;
+ case 6: case 7:
+ reg -= 4;
+ break;
+ default:
+ gold_error(_("%s: only registers %%g[2367] can be declared "
+ "using STT_REGISTER"),
+ object->name().c_str());
+ return NULL;
+ }
+ Register_symbol& rsym = this->register_syms_[reg];
+ if (rsym.name == NULL)
+ {
+ rsym.name = name;
+ rsym.shndx = shndx;
+ rsym.obj = object;
+ }
+ else
+ {
+ if (strcmp(rsym.name, name) != 0)
+ {
+ gold_error(_("%s: register %%g%d declared as '%s'; "
+ "previously declared as '%s' in %s"),
+ object->name().c_str(),
+ static_cast<int>(value),
+ *name ? name : "#scratch",
+ *rsym.name ? rsym.name : "#scratch",
+ rsym.obj->name().c_str());
+ return NULL;
+ }
+ }
+ return NULL;
+ }
+ return new Sized_symbol<size>();
+}
+
// Process relocations for gc.
template<int size, bool big_endian>
{
typedef Target_sparc<size, big_endian> Sparc;
typedef typename Target_sparc<size, big_endian>::Scan Scan;
+ typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
+ Classify_reloc;
- gold::gc_process_relocs<size, big_endian, Sparc, elfcpp::SHT_RELA, Scan,
- typename Target_sparc::Relocatable_size_for_reloc>(
+ gold::gc_process_relocs<size, big_endian, Sparc, Scan, Classify_reloc>(
symtab,
layout,
this,
const unsigned char* plocal_symbols)
{
typedef Target_sparc<size, big_endian> Sparc;
- typedef typename Target_sparc<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, Sparc, elfcpp::SHT_RELA, Scan>(
+ gold::scan_relocs<size, big_endian, Sparc, Scan, Classify_reloc>(
symtab,
layout,
this,
symtab->define_symbols(layout, 2, syms,
layout->script_options()->saw_sections_clause());
}
+
+ for (int reg = 0; reg < 4; ++reg)
+ {
+ Register_symbol& rsym = this->register_syms_[reg];
+ if (rsym.name != NULL)
+ {
+ int value = reg < 3 ? reg + 2 : reg + 4;
+ Sized_symbol<size>* sym = new Sized_symbol<size>();
+ if (rsym.shndx == elfcpp::SHN_UNDEF)
+ sym->init_undefined(rsym.name, NULL, value,
+ elfcpp::STT_SPARC_REGISTER, elfcpp::STB_GLOBAL,
+ elfcpp::STV_DEFAULT, 0);
+ else
+ sym->init_constant(rsym.name, NULL, value, 0,
+ elfcpp::STT_SPARC_REGISTER, elfcpp::STB_GLOBAL,
+ elfcpp::STV_DEFAULT, 0, false);
+ symtab->add_target_global_symbol(sym);
+ layout->add_target_specific_dynamic_tag(elfcpp::DT_SPARC_REGISTER,
+ value);
+ }
+ }
}
// Perform a relocation.
inline bool
Target_sparc<size, big_endian>::Relocate::relocate(
const Relocate_info<size, big_endian>* relinfo,
+ unsigned int,
Target_sparc* target,
Output_section*,
size_t relnum,
- const elfcpp::Rela<size, big_endian>& rela,
- unsigned int r_type,
+ const unsigned char* preloc,
const Sized_symbol<size>* gsym,
const Symbol_value<size>* psymval,
unsigned char* view,
typename elfcpp::Elf_types<size>::Elf_Addr address,
section_size_type view_size)
{
+ const elfcpp::Rela<size, big_endian> rela(preloc);
+ unsigned int r_type = elfcpp::elf_r_type<size>(rela.get_r_info());
bool orig_is_ifunc = psymval->is_ifunc_symbol();
r_type &= 0xff;
return false;
}
}
+
+ if (view == NULL)
+ return true;
+
if (this->reloc_adjust_addr_ == view)
view -= 4;
{
elfcpp::Elf_Xword value;
- value = target->plt_address_for_global(gsym) + gsym->plt_offset();
+ value = target->plt_address_for_global(gsym);
symval.set_output_value(value);
unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
if (object->local_has_plt_offset(r_sym))
{
- symval.set_output_value(target->plt_address_for_local(object, r_sym)
- + object->local_plt_offset(r_sym));
+ symval.set_output_value(target->plt_address_for_local(object, r_sym));
psymval = &symval;
}
}
&& !gsym->is_preemptible()
&& !orig_is_ifunc))
{
- got_offset = psymval->value(object, 0) - target->got_address();
+ got_offset = psymval->value(object, addend) - target->got_address();
gdop_valid = true;
break;
}
+ // Fall through.
case elfcpp::R_SPARC_GOT10:
case elfcpp::R_SPARC_GOT13:
case elfcpp::R_SPARC_GOT22:
if (gsym != NULL)
- {
- gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
- got_offset = gsym->got_offset(GOT_TYPE_STANDARD);
- }
+ {
+ gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
+ got_offset = gsym->got_offset(GOT_TYPE_STANDARD);
+ }
else
- {
- unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
- gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD));
- got_offset = object->local_got_offset(r_sym, GOT_TYPE_STANDARD);
- }
+ {
+ unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
+ gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD));
+ got_offset = object->local_got_offset(r_sym, GOT_TYPE_STANDARD);
+ }
break;
default:
if (rela.get_r_offset() & 0x1)
{
// The assembler can sometimes emit unaligned relocations
- // for dwarf2 cfi directives.
+ // for dwarf2 cfi directives.
Reloc::ua16(view, object, psymval, addend);
}
else
if (rela.get_r_offset() & 0x3)
{
// The assembler can sometimes emit unaligned relocations
- // for dwarf2 cfi directives.
+ // for dwarf2 cfi directives.
Reloc::ua32(view, object, psymval, addend);
}
else
Reloc::lo10(view, object, psymval, addend);
break;
+ case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
+ if (gdop_valid)
+ {
+ Reloc::gdop_lox10(view, got_offset);
+ break;
+ }
+ // Fall through.
case elfcpp::R_SPARC_GOT10:
Reloc::lo10(view, got_offset, addend);
break;
}
break;
- case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
- if (gdop_valid)
- {
- Reloc::gdop_lox10(view, got_offset, addend);
- break;
- }
- /* Fall through. */
case elfcpp::R_SPARC_GOT13:
Reloc::rela32_13(view, got_offset, addend);
break;
case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
if (gdop_valid)
{
- Reloc::gdop_hix22(view, got_offset, addend);
+ Reloc::gdop_hix22(view, got_offset);
break;
}
- /* Fall through. */
+ // Fall through.
case elfcpp::R_SPARC_GOT22:
Reloc::hi22(view, got_offset, addend);
break;
if (rela.get_r_offset() & 0x7)
{
// The assembler can sometimes emit unaligned relocations
- // for dwarf2 cfi directives.
+ // for dwarf2 cfi directives.
Reloc::ua64(view, object, psymval, addend);
}
else
const bool is_final =
(gsym == NULL
- ? !parameters->options().output_is_position_independent()
+ ? !parameters->options().shared()
: gsym->final_value_is_known());
const tls::Tls_optimization optimized_type
= optimize_tls_reloc(is_final, r_type);
break;
}
else
- {
- unsigned int got_type = (optimized_type == tls::TLSOPT_TO_IE
- ? GOT_TYPE_TLS_OFFSET
- : GOT_TYPE_TLS_PAIR);
- if (gsym != NULL)
- {
- gold_assert(gsym->has_got_offset(got_type));
- value = gsym->got_offset(got_type);
- }
- else
- {
- unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
- gold_assert(object->local_has_got_offset(r_sym, got_type));
- value = object->local_got_offset(r_sym, got_type);
- }
- if (optimized_type == tls::TLSOPT_TO_IE)
+ {
+ unsigned int got_type = (optimized_type == tls::TLSOPT_TO_IE
+ ? GOT_TYPE_TLS_OFFSET
+ : GOT_TYPE_TLS_PAIR);
+ if (gsym != NULL)
+ {
+ gold_assert(gsym->has_got_offset(got_type));
+ value = gsym->got_offset(got_type);
+ }
+ else
+ {
+ unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
+ gold_assert(object->local_has_got_offset(r_sym, got_type));
+ value = object->local_got_offset(r_sym, got_type);
+ }
+ if (optimized_type == tls::TLSOPT_TO_IE)
{
Insntype* wv = reinterpret_cast<Insntype*>(view);
Insntype val;
elfcpp::Swap<32, true>::writeval(wv, 0x9001c008);
break;
}
- break;
+ break;
}
- else if (optimized_type == tls::TLSOPT_NONE)
- {
+ else if (optimized_type == tls::TLSOPT_NONE)
+ {
switch (r_type)
{
case elfcpp::R_SPARC_TLS_GD_HI22:
break;
}
break;
- }
- }
+ }
+ }
gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
_("unsupported reloc %u"),
r_type);
break;
}
else if (optimized_type == tls::TLSOPT_NONE)
- {
- // Relocate the field with the offset of the GOT entry for
- // the module index.
- unsigned int got_offset;
+ {
+ // Relocate the field with the offset of the GOT entry for
+ // the module index.
+ unsigned int got_offset;
got_offset = target->got_mod_index_entry(NULL, NULL, NULL);
switch (r_type)
}
break;
}
- break;
- }
+ break;
+ }
gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
_("unsupported reloc %u"),
r_type);
if (op3 != 0x3d)
{
// First check RS1
- reg = (delay_insn >> 14) & 0x15;
+ reg = (delay_insn >> 14) & 0x1f;
if (reg == 15)
return;
{
typedef Target_sparc<size, big_endian> Sparc;
typedef typename Target_sparc<size, big_endian>::Relocate Sparc_relocate;
+ 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, Sparc, elfcpp::SHT_RELA,
- Sparc_relocate>(
+ gold::relocate_section<size, big_endian, Sparc, Sparc_relocate,
+ gold::Default_comdat_behavior, Classify_reloc>(
relinfo,
this,
prelocs,
reloc_symbol_changes);
}
-// Return the size of a relocation while scanning during a relocatable
-// link.
-
-template<int size, bool big_endian>
-unsigned int
-Target_sparc<size, big_endian>::Relocatable_size_for_reloc::get_size_for_reloc(
- unsigned int,
- Relobj*)
-{
- // We are always SHT_RELA, so we should never get here.
- gold_unreachable();
- return 0;
-}
-
// Scan the relocs during a relocatable link.
template<int size, bool big_endian>
const unsigned char* plocal_symbols,
Relocatable_relocs* rr)
{
- gold_assert(sh_type == elfcpp::SHT_RELA);
+ typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
+ Classify_reloc;
+ typedef gold::Default_scan_relocatable_relocs<Classify_reloc>
+ Scan_relocatable_relocs;
- typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_RELA,
- Relocatable_size_for_reloc> Scan_relocatable_relocs;
+ gold_assert(sh_type == elfcpp::SHT_RELA);
- gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA,
- Scan_relocatable_relocs>(
+ gold::scan_relocatable_relocs<size, big_endian, Scan_relocatable_relocs>(
symtab,
layout,
object,
rr);
}
-// Relocate a section during a relocatable link.
+// Scan the relocs for --emit-relocs.
template<int size, bool big_endian>
void
-Target_sparc<size, big_endian>::relocate_for_relocatable(
+Target_sparc<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.
+
+template<int size, bool big_endian>
+void
+Target_sparc<size, big_endian>::relocate_relocs(
const Relocate_info<size, big_endian>* relinfo,
unsigned int sh_type,
const unsigned char* prelocs,
size_t reloc_count,
Output_section* output_section,
- off_t offset_in_output_section,
- const Relocatable_relocs* rr,
+ typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section,
unsigned char* view,
typename elfcpp::Elf_types<size>::Elf_Addr view_address,
section_size_type view_size,
unsigned char* reloc_view,
section_size_type reloc_view_size)
{
+ typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian>
+ Classify_reloc;
+
gold_assert(sh_type == elfcpp::SHT_RELA);
- gold::relocate_for_relocatable<size, big_endian, elfcpp::SHT_RELA>(
+ gold::relocate_relocs<size, big_endian, Classify_reloc>(
relinfo,
prelocs,
reloc_count,
output_section,
offset_in_output_section,
- rr,
view,
view_address,
view_size,
elfcpp::Elf_Half machine = ehdr.get_e_machine();
elfcpp::Elf_Word flags = ehdr.get_e_flags();
elfcpp::Elf_Word omm, mm;
-
+
switch (machine)
{
case elfcpp::EM_SPARC32PLUS:
void
Target_sparc<size, big_endian>::do_adjust_elf_header(
unsigned char* view,
- int len) const
+ int len)
{
elfcpp::Ehdr_write<size, big_endian> oehdr(view);
(size == 64 ? "elf64_sparc" : "elf32_sparc"))
{ }
- Target* do_recognize(int machine, int, int)
+ virtual Target*
+ do_recognize(Input_file*, off_t, int machine, int, int)
{
switch (size)
{
return this->instantiate_target();
}
- Target* do_instantiate_target()
+ virtual Target*
+ do_instantiate_target()
{ return new Target_sparc<size, big_endian>(); }
};
projects / deliverable / binutils-gdb.git / blobdiff