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Add support for R_MIPS_HIGHER/HIGHEST, R_MICROMIPS_HIGHER/HIGHEST relocations. 

2017-02-15  Vladimir Radosavljevic  <Vladimir.Radosavljevic@imgtec.com>

        PR gold/21111
        * mips.cc (Mips_relocate_functions::relhigher): New method.
        (Mips_relocate_functions::relhighest): Likewise.
        (mips_get_size_for_reloc): Add support for relocs: R_MIPS_HIGHER and
        R_MIPS_HIGHEST.
        (Target_mips::Scan::local): Add support for relocs: R_MIPS_HIGHER,
        R_MIPS_HIGHEST, R_MICROMIPS_HIGHER and R_MICROMIPS_HIGHEST.
        (Target_mips::Scan::global): Likewise.
        (Target_mips::Scan::get_reference_flags): Likewise.
        (Target_mips::Relocate::relocate): Call static methods for resolving
        HIGHER and HIGHEST relocations.
This commit is contained in:
Vladimir Radosavljevic 2017-02-15 00:47:36 -08:00 committed by Cary Coutant
parent 66a5a74065
commit e242ece1e8
2 changed files with 87 additions and 0 deletions
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14
gold/ChangeLog
View File

@ -1,3 +1,17 @@
2017-02-15 Vladimir Radosavljevic <Vladimir.Radosavljevic@imgtec.com>
PR gold/21111
* mips.cc (Mips_relocate_functions::relhigher): New method.
(Mips_relocate_functions::relhighest): Likewise.
(mips_get_size_for_reloc): Add support for relocs: R_MIPS_HIGHER and
R_MIPS_HIGHEST.
(Target_mips::Scan::local): Add support for relocs: R_MIPS_HIGHER,
R_MIPS_HIGHEST, R_MICROMIPS_HIGHER and R_MICROMIPS_HIGHEST.
(Target_mips::Scan::global): Likewise.
(Target_mips::Scan::get_reference_flags): Likewise.
(Target_mips::Relocate::relocate): Call static methods for resolving
HIGHER and HIGHEST relocations.
2017-02-03 Rahul Chaudhry <rahulchaudhry@google.com>
* x86_64.cc (Target_x86_64::do_can_check_for_function_pointers):

73
gold/mips.cc
View File

@ -5579,6 +5579,52 @@ class Mips_relocate_functions : public Relocate_functions<size, big_endian>
return This::STATUS_OKAY;
}
// R_MIPS_HIGHER, R_MICROMIPS_HIGHER
static inline typename This::Status
relhigher(unsigned char* view, const Mips_relobj<size, big_endian>* object,
const Symbol_value<size>* psymval, Mips_address addend_a,
bool extract_addend, bool calculate_only, Valtype* calculated_value)
{
Valtype32* wv = reinterpret_cast<Valtype32*>(view);
Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
Valtype addend = (extract_addend ? Bits<16>::sign_extend32(val & 0xffff)
: addend_a);
Valtype x = psymval->value(object, addend);
x = ((x + (uint64_t) 0x80008000) >> 32) & 0xffff;
val = Bits<32>::bit_select32(val, x, 0xffff);
if (calculate_only)
*calculated_value = x;
else
elfcpp::Swap<32, big_endian>::writeval(wv, val);
return This::STATUS_OKAY;
}
// R_MIPS_HIGHEST, R_MICROMIPS_HIGHEST
static inline typename This::Status
relhighest(unsigned char* view, const Mips_relobj<size, big_endian>* object,
const Symbol_value<size>* psymval, Mips_address addend_a,
bool extract_addend, bool calculate_only,
Valtype* calculated_value)
{
Valtype32* wv = reinterpret_cast<Valtype32*>(view);
Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
Valtype addend = (extract_addend ? Bits<16>::sign_extend32(val & 0xffff)
: addend_a);
Valtype x = psymval->value(object, addend);
x = ((x + (uint64_t) 0x800080008000) >> 48) & 0xffff;
val = Bits<32>::bit_select32(val, x, 0xffff);
if (calculate_only)
*calculated_value = x;
else
elfcpp::Swap<32, big_endian>::writeval(wv, val);
return This::STATUS_OKAY;
}
};
template<int size, bool big_endian>
@ -9935,6 +9981,8 @@ mips_get_size_for_reloc(unsigned int r_type, Relobj* object)
case elfcpp::R_MIPS_16:
case elfcpp::R_MIPS_HI16:
case elfcpp::R_MIPS_LO16:
case elfcpp::R_MIPS_HIGHER:
case elfcpp::R_MIPS_HIGHEST:
case elfcpp::R_MIPS_GPREL16:
case elfcpp::R_MIPS16_HI16:
case elfcpp::R_MIPS16_LO16:
@ -10673,7 +10721,11 @@ Target_mips<size, big_endian>::Scan::local(
{
case elfcpp::R_MIPS16_HI16:
case elfcpp::R_MIPS_HI16:
case elfcpp::R_MIPS_HIGHER:
case elfcpp::R_MIPS_HIGHEST:
case elfcpp::R_MICROMIPS_HI16:
case elfcpp::R_MICROMIPS_HIGHER:
case elfcpp::R_MICROMIPS_HIGHEST:
// Don't refuse a high part relocation if it's against
// no symbol (e.g. part of a compound relocation).
if (r_sym == 0)
@ -11176,7 +11228,11 @@ Target_mips<size, big_endian>::Scan::global(
{
case elfcpp::R_MIPS16_HI16:
case elfcpp::R_MIPS_HI16:
case elfcpp::R_MIPS_HIGHER:
case elfcpp::R_MIPS_HIGHEST:
case elfcpp::R_MICROMIPS_HI16:
case elfcpp::R_MICROMIPS_HIGHER:
case elfcpp::R_MICROMIPS_HIGHEST:
// Don't refuse a high part relocation if it's against
// no symbol (e.g. part of a compound relocation).
if (r_sym == 0)
@ -12121,6 +12177,19 @@ Target_mips<size, big_endian>::Relocate::relocate(
extract_addend,
calculate_only, &calculated_value);
break;
case elfcpp::R_MIPS_HIGHER:
case elfcpp::R_MICROMIPS_HIGHER:
reloc_status = Reloc_funcs::relhigher(view, object, psymval, r_addend,
extract_addend, calculate_only,
&calculated_value);
break;
case elfcpp::R_MIPS_HIGHEST:
case elfcpp::R_MICROMIPS_HIGHEST:
reloc_status = Reloc_funcs::relhighest(view, object, psymval,
r_addend, extract_addend,
calculate_only,
&calculated_value);
break;
default:
gold_error_at_location(relinfo, relnum, r_offset,
_("unsupported reloc %u"), r_types[i]);
@ -12186,10 +12255,14 @@ Target_mips<size, big_endian>::Scan::get_reference_flags(
case elfcpp::R_MIPS_64:
case elfcpp::R_MIPS_HI16:
case elfcpp::R_MIPS_LO16:
case elfcpp::R_MIPS_HIGHER:
case elfcpp::R_MIPS_HIGHEST:
case elfcpp::R_MIPS16_HI16:
case elfcpp::R_MIPS16_LO16:
case elfcpp::R_MICROMIPS_HI16:
case elfcpp::R_MICROMIPS_LO16:
case elfcpp::R_MICROMIPS_HIGHER:
case elfcpp::R_MICROMIPS_HIGHEST:
return Symbol::ABSOLUTE_REF;
case elfcpp::R_MIPS_26: