// sparc.cc -- sparc target support for gold.
-// Copyright (C) 2008-2016 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.
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_()
{
}
+ // 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
// 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
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.
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<>
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
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
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:
// 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())
+ 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());
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:
reloc.get_r_offset(),
reloc.get_r_addend());
}
- else if ((r_type == elfcpp::R_SPARC_32
- || r_type == elfcpp::R_SPARC_64)
+ 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);
// 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:
}
}
+// 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>
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.
gdop_valid = true;
break;
}
+ // Fall through.
case elfcpp::R_SPARC_GOT10:
case elfcpp::R_SPARC_GOT13:
case elfcpp::R_SPARC_GOT22:
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);
- break;
- }
- /* Fall through. */
case elfcpp::R_SPARC_GOT13:
Reloc::rela32_13(view, got_offset, addend);
break;
Reloc::gdop_hix22(view, got_offset);
break;
}
- /* Fall through. */
+ // Fall through.
case elfcpp::R_SPARC_GOT22:
Reloc::hi22(view, got_offset, addend);
break;
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);
if (op3 != 0x3d)
{
// First check RS1
- reg = (delay_insn >> 14) & 0x15;
+ reg = (delay_insn >> 14) & 0x1f;
if (reg == 15)
return;
projects / deliverable / binutils-gdb.git / blobdiff