PPC gold doesn't check for overflow properly
Corrects overflow test for rel14, addr14, rel24, addr24 branch relocs, and prints an information message to give a hint as to how a branch that can't reach a stub might be cured. bfd/ * elf64-ppc.c (group_sections): Init stub14_group_size from --stub-group-size parameter divided by 1024. gold/ * powerpc.cc (Stub_control::Stub_control): Init stub14_group_size_ from --stub-group-size parameter divided by 1024. (Powerpc_relocate_functions::rela, rela_ua): Add fieldsize template parameter. Update all uses. (Target_powerpc::Relocate::relocate): Rename has_plt_value to has_stub_value. Set for long branches. Don't report overflow for branch to undefined weak symbols. Print info message on overflowing branch to stub.
This commit is contained in:
Alan Modra
parent
1e269e9b8f
commit
0cfb071748
@ -1,3 +1,8 @@
|
||||
2014-11-20 Alan Modra <amodra@gmail.com>
|
||||
|
||||
* elf64-ppc.c (group_sections): Init stub14_group_size from
|
||||
--stub-group-size parameter divided by 1024.
|
||||
|
||||
2014-11-20 Alan Modra <amodra@gmail.com>
|
||||
|
||||
* elf32-ppc.c (ppc_elf_relax_section): Correct ppc476 workaround
|
||||
|
||||
@ -11805,7 +11805,7 @@ group_sections (struct ppc_link_hash_table *htab,
|
||||
bfd_boolean suppress_size_errors;
|
||||
|
||||
suppress_size_errors = FALSE;
|
||||
stub14_group_size = stub_group_size;
|
||||
stub14_group_size = stub_group_size >> 10;
|
||||
if (stub_group_size == 1)
|
||||
{
|
||||
/* Default values. */
|
||||
|
||||
@ -1,3 +1,14 @@
|
||||
2014-11-20 Alan Modra <amodra@gmail.com>
|
||||
|
||||
* powerpc.cc (Stub_control::Stub_control): Init stub14_group_size_
|
||||
from --stub-group-size parameter divided by 1024.
|
||||
(Powerpc_relocate_functions::rela, rela_ua): Add fieldsize
|
||||
template parameter. Update all uses.
|
||||
(Target_powerpc::Relocate::relocate): Rename has_plt_value to
|
||||
has_stub_value. Set for long branches. Don't report overflow for
|
||||
branch to undefined weak symbols. Print info message on
|
||||
overflowing branch to stub.
|
||||
|
||||
2014-11-20 Alan Modra <amodra@gmail.com>
|
||||
|
||||
* powerpc.cc (Target_powerpc::do_relax): Add __go_go to thread_starters.
|
||||
|
||||
@ -1524,58 +1524,58 @@ private:
|
||||
}
|
||||
|
||||
// Do a simple RELA relocation
|
||||
template<int valsize>
|
||||
template<int fieldsize, int valsize>
|
||||
static inline Status
|
||||
rela(unsigned char* view, Address value, Overflow_check overflow)
|
||||
{
|
||||
typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
|
||||
typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype;
|
||||
Valtype* wv = reinterpret_cast<Valtype*>(view);
|
||||
elfcpp::Swap<valsize, big_endian>::writeval(wv, value);
|
||||
elfcpp::Swap<fieldsize, big_endian>::writeval(wv, value);
|
||||
return overflowed<valsize>(value, overflow);
|
||||
}
|
||||
|
||||
template<int valsize>
|
||||
template<int fieldsize, int valsize>
|
||||
static inline Status
|
||||
rela(unsigned char* view,
|
||||
unsigned int right_shift,
|
||||
typename elfcpp::Valtype_base<valsize>::Valtype dst_mask,
|
||||
typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask,
|
||||
Address value,
|
||||
Overflow_check overflow)
|
||||
{
|
||||
typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
|
||||
typedef typename elfcpp::Swap<fieldsize, big_endian>::Valtype Valtype;
|
||||
Valtype* wv = reinterpret_cast<Valtype*>(view);
|
||||
Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
|
||||
Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(wv);
|
||||
Valtype reloc = value >> right_shift;
|
||||
val &= ~dst_mask;
|
||||
reloc &= dst_mask;
|
||||
elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
|
||||
elfcpp::Swap<fieldsize, big_endian>::writeval(wv, val | reloc);
|
||||
return overflowed<valsize>(value >> right_shift, overflow);
|
||||
}
|
||||
|
||||
// Do a simple RELA relocation, unaligned.
|
||||
template<int valsize>
|
||||
template<int fieldsize, int valsize>
|
||||
static inline Status
|
||||
rela_ua(unsigned char* view, Address value, Overflow_check overflow)
|
||||
{
|
||||
elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, value);
|
||||
elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, value);
|
||||
return overflowed<valsize>(value, overflow);
|
||||
}
|
||||
|
||||
template<int valsize>
|
||||
template<int fieldsize, int valsize>
|
||||
static inline Status
|
||||
rela_ua(unsigned char* view,
|
||||
unsigned int right_shift,
|
||||
typename elfcpp::Valtype_base<valsize>::Valtype dst_mask,
|
||||
typename elfcpp::Valtype_base<fieldsize>::Valtype dst_mask,
|
||||
Address value,
|
||||
Overflow_check overflow)
|
||||
{
|
||||
typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype
|
||||
typedef typename elfcpp::Swap_unaligned<fieldsize, big_endian>::Valtype
|
||||
Valtype;
|
||||
Valtype val = elfcpp::Swap<valsize, big_endian>::readval(view);
|
||||
Valtype val = elfcpp::Swap<fieldsize, big_endian>::readval(view);
|
||||
Valtype reloc = value >> right_shift;
|
||||
val &= ~dst_mask;
|
||||
reloc &= dst_mask;
|
||||
elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, val | reloc);
|
||||
elfcpp::Swap_unaligned<fieldsize, big_endian>::writeval(view, val | reloc);
|
||||
return overflowed<valsize>(value >> right_shift, overflow);
|
||||
}
|
||||
|
||||
@ -1583,28 +1583,29 @@ public:
|
||||
// R_PPC64_ADDR64: (Symbol + Addend)
|
||||
static inline void
|
||||
addr64(unsigned char* view, Address value)
|
||||
{ This::template rela<64>(view, value, CHECK_NONE); }
|
||||
{ This::template rela<64,64>(view, value, CHECK_NONE); }
|
||||
|
||||
// R_PPC64_UADDR64: (Symbol + Addend) unaligned
|
||||
static inline void
|
||||
addr64_u(unsigned char* view, Address value)
|
||||
{ This::template rela_ua<64>(view, value, CHECK_NONE); }
|
||||
{ This::template rela_ua<64,64>(view, value, CHECK_NONE); }
|
||||
|
||||
// R_POWERPC_ADDR32: (Symbol + Addend)
|
||||
static inline Status
|
||||
addr32(unsigned char* view, Address value, Overflow_check overflow)
|
||||
{ return This::template rela<32>(view, value, overflow); }
|
||||
{ return This::template rela<32,32>(view, value, overflow); }
|
||||
|
||||
// R_POWERPC_UADDR32: (Symbol + Addend) unaligned
|
||||
static inline Status
|
||||
addr32_u(unsigned char* view, Address value, Overflow_check overflow)
|
||||
{ return This::template rela_ua<32>(view, value, overflow); }
|
||||
{ return This::template rela_ua<32,32>(view, value, overflow); }
|
||||
|
||||
// R_POWERPC_ADDR24: (Symbol + Addend) & 0x3fffffc
|
||||
static inline Status
|
||||
addr24(unsigned char* view, Address value, Overflow_check overflow)
|
||||
{
|
||||
Status stat = This::template rela<32>(view, 0, 0x03fffffc, value, overflow);
|
||||
Status stat = This::template rela<32,26>(view, 0, 0x03fffffc,
|
||||
value, overflow);
|
||||
if (overflow != CHECK_NONE && (value & 3) != 0)
|
||||
stat = STATUS_OVERFLOW;
|
||||
return stat;
|
||||
@ -1613,18 +1614,18 @@ public:
|
||||
// R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
|
||||
static inline Status
|
||||
addr16(unsigned char* view, Address value, Overflow_check overflow)
|
||||
{ return This::template rela<16>(view, value, overflow); }
|
||||
{ return This::template rela<16,16>(view, value, overflow); }
|
||||
|
||||
// R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff, unaligned
|
||||
static inline Status
|
||||
addr16_u(unsigned char* view, Address value, Overflow_check overflow)
|
||||
{ return This::template rela_ua<16>(view, value, overflow); }
|
||||
{ return This::template rela_ua<16,16>(view, value, overflow); }
|
||||
|
||||
// R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
|
||||
static inline Status
|
||||
addr16_ds(unsigned char* view, Address value, Overflow_check overflow)
|
||||
{
|
||||
Status stat = This::template rela<16>(view, 0, 0xfffc, value, overflow);
|
||||
Status stat = This::template rela<16,16>(view, 0, 0xfffc, value, overflow);
|
||||
if (overflow != CHECK_NONE && (value & 3) != 0)
|
||||
stat = STATUS_OVERFLOW;
|
||||
return stat;
|
||||
@ -1633,7 +1634,7 @@ public:
|
||||
// R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
|
||||
static inline void
|
||||
addr16_hi(unsigned char* view, Address value)
|
||||
{ This::template rela<16>(view, 16, 0xffff, value, CHECK_NONE); }
|
||||
{ This::template rela<16,16>(view, 16, 0xffff, value, CHECK_NONE); }
|
||||
|
||||
// R_POWERPC_ADDR16_HA: ((Symbol + Addend + 0x8000) >> 16) & 0xffff
|
||||
static inline void
|
||||
@ -1643,7 +1644,7 @@ public:
|
||||
// R_POWERPC_ADDR16_HIGHER: ((Symbol + Addend) >> 32) & 0xffff
|
||||
static inline void
|
||||
addr16_hi2(unsigned char* view, Address value)
|
||||
{ This::template rela<16>(view, 32, 0xffff, value, CHECK_NONE); }
|
||||
{ This::template rela<16,16>(view, 32, 0xffff, value, CHECK_NONE); }
|
||||
|
||||
// R_POWERPC_ADDR16_HIGHERA: ((Symbol + Addend + 0x8000) >> 32) & 0xffff
|
||||
static inline void
|
||||
@ -1653,7 +1654,7 @@ public:
|
||||
// R_POWERPC_ADDR16_HIGHEST: ((Symbol + Addend) >> 48) & 0xffff
|
||||
static inline void
|
||||
addr16_hi3(unsigned char* view, Address value)
|
||||
{ This::template rela<16>(view, 48, 0xffff, value, CHECK_NONE); }
|
||||
{ This::template rela<16,16>(view, 48, 0xffff, value, CHECK_NONE); }
|
||||
|
||||
// R_POWERPC_ADDR16_HIGHESTA: ((Symbol + Addend + 0x8000) >> 48) & 0xffff
|
||||
static inline void
|
||||
@ -1664,7 +1665,7 @@ public:
|
||||
static inline Status
|
||||
addr14(unsigned char* view, Address value, Overflow_check overflow)
|
||||
{
|
||||
Status stat = This::template rela<32>(view, 0, 0xfffc, value, overflow);
|
||||
Status stat = This::template rela<32,16>(view, 0, 0xfffc, value, overflow);
|
||||
if (overflow != CHECK_NONE && (value & 3) != 0)
|
||||
stat = STATUS_OVERFLOW;
|
||||
return stat;
|
||||
@ -2362,7 +2363,7 @@ class Stub_control
|
||||
// the stubbed branches.
|
||||
Stub_control(int32_t size)
|
||||
: state_(NO_GROUP), stub_group_size_(abs(size)),
|
||||
stub14_group_size_(abs(size)),
|
||||
stub14_group_size_(abs(size) >> 10),
|
||||
stubs_always_before_branch_(size < 0), suppress_size_errors_(false),
|
||||
group_end_addr_(0), owner_(NULL), output_section_(NULL)
|
||||
{
|
||||
@ -6702,7 +6703,7 @@ Target_powerpc<size, big_endian>::Relocate::relocate(
|
||||
Powerpc_relobj<size, big_endian>* const object
|
||||
= static_cast<Powerpc_relobj<size, big_endian>*>(relinfo->object);
|
||||
Address value = 0;
|
||||
bool has_plt_value = false;
|
||||
bool has_stub_value = false;
|
||||
unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
|
||||
if ((gsym != NULL
|
||||
? gsym->use_plt_offset(Scan::get_reference_flags(r_type, target))
|
||||
@ -6741,7 +6742,7 @@ Target_powerpc<size, big_endian>::Relocate::relocate(
|
||||
gold_assert(off != invalid_address);
|
||||
value = stub_table->stub_address() + off;
|
||||
}
|
||||
has_plt_value = true;
|
||||
has_stub_value = true;
|
||||
}
|
||||
|
||||
if (r_type == elfcpp::R_POWERPC_GOT16
|
||||
@ -6772,7 +6773,7 @@ Target_powerpc<size, big_endian>::Relocate::relocate(
|
||||
else if (gsym != NULL
|
||||
&& (r_type == elfcpp::R_POWERPC_REL24
|
||||
|| r_type == elfcpp::R_PPC_PLTREL24)
|
||||
&& has_plt_value)
|
||||
&& has_stub_value)
|
||||
{
|
||||
if (size == 64)
|
||||
{
|
||||
@ -7077,7 +7078,7 @@ Target_powerpc<size, big_endian>::Relocate::relocate(
|
||||
value = psymval->value(object, rela.get_r_addend());
|
||||
}
|
||||
}
|
||||
else if (!has_plt_value)
|
||||
else if (!has_stub_value)
|
||||
{
|
||||
Address addend = 0;
|
||||
unsigned int dest_shndx;
|
||||
@ -7115,8 +7116,11 @@ Target_powerpc<size, big_endian>::Relocate::relocate(
|
||||
{
|
||||
Address off = stub_table->find_long_branch_entry(object, value);
|
||||
if (off != invalid_address)
|
||||
value = (stub_table->stub_address() + stub_table->plt_size()
|
||||
+ off);
|
||||
{
|
||||
value = (stub_table->stub_address() + stub_table->plt_size()
|
||||
+ off);
|
||||
has_stub_value = true;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -7667,9 +7671,17 @@ Target_powerpc<size, big_endian>::Relocate::relocate(
|
||||
r_type);
|
||||
break;
|
||||
}
|
||||
if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK)
|
||||
gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
|
||||
_("relocation overflow"));
|
||||
if (status != Powerpc_relocate_functions<size, big_endian>::STATUS_OK
|
||||
&& !has_stub_value
|
||||
&& !(gsym != NULL
|
||||
&& gsym->is_weak_undefined()
|
||||
&& is_branch_reloc(r_type)))
|
||||
{
|
||||
gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
|
||||
_("relocation overflow"));
|
||||
if (has_stub_value)
|
||||
gold_info(_("try relinking with a smaller --stub-group-size"));
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user