// reloc.h -- relocate input files for gold -*- C++ -*-
-// Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+// Copyright (C) 2006-2021 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
class General_options;
class Object;
class Relobj;
-class Read_relocs_data;
+struct Read_relocs_data;
class Symbol;
class Layout;
class Output_data;
class Sized_symbol;
template<int size, bool big_endian>
-class Sized_relobj;
+class Sized_relobj_file;
template<int size>
class Symbol_value;
class Read_relocs : public Task
{
public:
- // SYMTAB_LOCK is used to lock the symbol table. BLOCKER should be
- // unblocked when the Scan_relocs task completes.
+ // THIS_BLOCKER and NEXT_BLOCKER are passed along to a Scan_relocs
+ // or Gc_process_relocs task, so that they run in a deterministic
+ // order.
Read_relocs(Symbol_table* symtab, Layout* layout, Relobj* object,
- Task_token* symtab_lock, Task_token* blocker)
+ Task_token* this_blocker, Task_token* next_blocker)
: symtab_(symtab), layout_(layout), object_(object),
- symtab_lock_(symtab_lock), blocker_(blocker)
+ this_blocker_(this_blocker), next_blocker_(next_blocker)
{ }
// The standard Task methods.
Symbol_table* symtab_;
Layout* layout_;
Relobj* object_;
- Task_token* symtab_lock_;
- Task_token* blocker_;
+ Task_token* this_blocker_;
+ Task_token* next_blocker_;
};
// Process the relocs to figure out which sections are garbage.
class Gc_process_relocs : public Task
{
public:
- // SYMTAB_LOCK is used to lock the symbol table. BLOCKER should be
- // unblocked when the task completes.
+ // THIS_BLOCKER prevents this task from running until the previous
+ // one is finished. NEXT_BLOCKER prevents the next task from
+ // running.
Gc_process_relocs(Symbol_table* symtab, Layout* layout, Relobj* object,
- Read_relocs_data* rd, Task_token* symtab_lock,
- Task_token* blocker)
+ Read_relocs_data* rd, Task_token* this_blocker,
+ Task_token* next_blocker)
: symtab_(symtab), layout_(layout), object_(object), rd_(rd),
- symtab_lock_(symtab_lock), blocker_(blocker)
+ this_blocker_(this_blocker), next_blocker_(next_blocker)
{ }
+ ~Gc_process_relocs();
+
// The standard Task methods.
Task_token*
Layout* layout_;
Relobj* object_;
Read_relocs_data* rd_;
- Task_token* symtab_lock_;
- Task_token* blocker_;
+ Task_token* this_blocker_;
+ Task_token* next_blocker_;
};
// Scan the relocations for an object to see if they require any
class Scan_relocs : public Task
{
public:
- // SYMTAB_LOCK is used to lock the symbol table. BLOCKER should be
- // unblocked when the task completes.
+ // THIS_BLOCKER prevents this task from running until the previous
+ // one is finished. NEXT_BLOCKER prevents the next task from
+ // running.
Scan_relocs(Symbol_table* symtab, Layout* layout, Relobj* object,
- Read_relocs_data* rd, Task_token* symtab_lock,
- Task_token* blocker)
+ Read_relocs_data* rd, Task_token* this_blocker,
+ Task_token* next_blocker)
: symtab_(symtab), layout_(layout), object_(object), rd_(rd),
- symtab_lock_(symtab_lock), blocker_(blocker)
+ this_blocker_(this_blocker), next_blocker_(next_blocker)
{ }
+ ~Scan_relocs();
+
// The standard Task methods.
Task_token*
Layout* layout_;
Relobj* object_;
Read_relocs_data* rd_;
- Task_token* symtab_lock_;
- Task_token* blocker_;
+ Task_token* this_blocker_;
+ Task_token* next_blocker_;
};
// A class to perform all the relocations for an object file.
RELOC_ADJUST_FOR_SECTION_2,
RELOC_ADJUST_FOR_SECTION_4,
RELOC_ADJUST_FOR_SECTION_8,
+ // Like RELOC_ADJUST_FOR_SECTION_4 but for unaligned relocs.
+ RELOC_ADJUST_FOR_SECTION_4_UNALIGNED,
// Discard the input reloc--process it completely when relocating
// the data section contents.
RELOC_DISCARD,
return static_cast<Reloc_strategy>(this->reloc_strategies_[i]);
}
+ // Set the strategy for reloc I.
+ void
+ set_strategy(unsigned int i, Reloc_strategy strategy)
+ {
+ gold_assert(i < this->reloc_strategies_.size());
+ this->reloc_strategies_[i] = strategy;
+ }
+
// Return the number of relocations to create in the output file.
size_t
output_reloc_count() const
Output_data* posd_;
};
+template<int valsize>
+class Bits;
+
// Standard relocation routines which are used on many targets. Here
// SIZE and BIG_ENDIAN refer to the target, not the relocation type.
template<int size, bool big_endian>
class Relocate_functions
{
-private:
+ public:
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
+ typedef typename elfcpp::Elf_types<size>::Elf_Swxword Addendtype;
+
+ enum Overflow_check
+ {
+ // No overflow checking.
+ CHECK_NONE,
+ // Check for overflow of a signed value.
+ CHECK_SIGNED,
+ // Check for overflow of an unsigned value.
+ CHECK_UNSIGNED,
+ // Check for overflow of a signed or unsigned value.
+ // (i.e., no error if either signed or unsigned fits.)
+ CHECK_SIGNED_OR_UNSIGNED
+ };
+
+ enum Reloc_status
+ {
+ RELOC_OK,
+ RELOC_OVERFLOW
+ };
+
+ private:
+ // Check for overflow.
+ template<int valsize>
+ static inline Reloc_status
+ check_overflow(Address value, Overflow_check check)
+ {
+ switch (check)
+ {
+ case CHECK_SIGNED:
+ if (size == 32)
+ return (Bits<valsize>::has_overflow32(value)
+ ? RELOC_OVERFLOW
+ : RELOC_OK);
+ else
+ return (Bits<valsize>::has_overflow(value)
+ ? RELOC_OVERFLOW
+ : RELOC_OK);
+ case CHECK_UNSIGNED:
+ if (size == 32)
+ return (Bits<valsize>::has_unsigned_overflow32(value)
+ ? RELOC_OVERFLOW
+ : RELOC_OK);
+ else
+ return (Bits<valsize>::has_unsigned_overflow(value)
+ ? RELOC_OVERFLOW
+ : RELOC_OK);
+ case CHECK_SIGNED_OR_UNSIGNED:
+ if (size == 32)
+ return (Bits<valsize>::has_signed_unsigned_overflow32(value)
+ ? RELOC_OVERFLOW
+ : RELOC_OK);
+ else
+ return (Bits<valsize>::has_signed_unsigned_overflow64(value)
+ ? RELOC_OVERFLOW
+ : RELOC_OK);
+ case CHECK_NONE:
+ default:
+ return RELOC_OK;
+ }
+ }
+
// Do a simple relocation with the addend in the section contents.
// VALSIZE is the size of the value.
template<int valsize>
- static inline void
- rel(unsigned char* view,
- typename elfcpp::Swap<valsize, big_endian>::Valtype value)
+ static inline Reloc_status
+ rel(unsigned char* view, Address value, Overflow_check check)
{
typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
Valtype* wv = reinterpret_cast<Valtype*>(view);
- Valtype x = elfcpp::Swap<valsize, big_endian>::readval(wv);
- elfcpp::Swap<valsize, big_endian>::writeval(wv, x + value);
+ Valtype addend = elfcpp::Swap<valsize, big_endian>::readval(wv);
+ value += addend;
+ elfcpp::Swap<valsize, big_endian>::
+ writeval(wv, static_cast<Valtype>(value));
+ return check_overflow<valsize>(value, check);
+ }
+
+ // Like the above but for relocs at unaligned addresses.
+ template<int valsize>
+ static inline Reloc_status
+ rel_unaligned(unsigned char* view, Address value, Overflow_check check)
+ {
+ typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype
+ Valtype;
+ Valtype addend = elfcpp::Swap_unaligned<valsize, big_endian>::readval(view);
+ value += addend;
+ elfcpp::Swap_unaligned<valsize, big_endian>::
+ writeval(view, static_cast<Valtype>(value));
+ return check_overflow<valsize>(value, check);
}
// Do a simple relocation using a Symbol_value with the addend in
// the section contents. VALSIZE is the size of the value to
// relocate.
template<int valsize>
- static inline void
+ static inline Reloc_status
rel(unsigned char* view,
- const Sized_relobj<size, big_endian>* object,
- const Symbol_value<size>* psymval)
+ const Sized_relobj_file<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ Overflow_check check)
{
typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
Valtype* wv = reinterpret_cast<Valtype*>(view);
- Valtype x = elfcpp::Swap<valsize, big_endian>::readval(wv);
- x = psymval->value(object, x);
- elfcpp::Swap<valsize, big_endian>::writeval(wv, x);
+ Valtype addend = elfcpp::Swap<valsize, big_endian>::readval(wv);
+ Address value = psymval->value(object, addend);
+ elfcpp::Swap<valsize, big_endian>::
+ writeval(wv, static_cast<Valtype>(value));
+ return check_overflow<valsize>(value, check);
+ }
+
+ // Like the above but for relocs at unaligned addresses.
+ template<int valsize>
+ static inline Reloc_status
+ rel_unaligned(unsigned char* view,
+ const Sized_relobj_file<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ Overflow_check check)
+ {
+ typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype
+ Valtype;
+ Valtype addend = elfcpp::Swap_unaligned<valsize, big_endian>::readval(view);
+ Address value = psymval->value(object, addend);
+ elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, value);
+ return check_overflow<valsize>(value, check);
}
// Do a simple relocation with the addend in the relocation.
// VALSIZE is the size of the value.
template<int valsize>
- static inline void
- rela(unsigned char* view,
- typename elfcpp::Swap<valsize, big_endian>::Valtype value,
- typename elfcpp::Swap<valsize, big_endian>::Valtype addend)
+ static inline Reloc_status
+ rela(unsigned char* view, Address value, Addendtype addend,
+ Overflow_check check)
{
typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
Valtype* wv = reinterpret_cast<Valtype*>(view);
- elfcpp::Swap<valsize, big_endian>::writeval(wv, value + addend);
+ value += addend;
+ elfcpp::Swap<valsize, big_endian>::writeval(wv, value);
+ return check_overflow<valsize>(value, check);
}
// Do a simple relocation using a symbol value with the addend in
// the relocation. VALSIZE is the size of the value.
template<int valsize>
- static inline void
+ static inline Reloc_status
rela(unsigned char* view,
- const Sized_relobj<size, big_endian>* object,
+ const Sized_relobj_file<size, big_endian>* object,
const Symbol_value<size>* psymval,
- typename elfcpp::Swap<valsize, big_endian>::Valtype addend)
+ Addendtype addend,
+ Overflow_check check)
{
typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
Valtype* wv = reinterpret_cast<Valtype*>(view);
- Valtype x = psymval->value(object, addend);
- elfcpp::Swap<valsize, big_endian>::writeval(wv, x);
+ Address value = psymval->value(object, addend);
+ elfcpp::Swap<valsize, big_endian>::writeval(wv, value);
+ return check_overflow<valsize>(value, check);
}
// Do a simple PC relative relocation with the addend in the section
// contents. VALSIZE is the size of the value.
template<int valsize>
- static inline void
- pcrel(unsigned char* view,
- typename elfcpp::Swap<valsize, big_endian>::Valtype value,
- typename elfcpp::Elf_types<size>::Elf_Addr address)
+ static inline Reloc_status
+ pcrel(unsigned char* view, Address value, Address address,
+ Overflow_check check)
{
typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
Valtype* wv = reinterpret_cast<Valtype*>(view);
- Valtype x = elfcpp::Swap<valsize, big_endian>::readval(wv);
- elfcpp::Swap<valsize, big_endian>::writeval(wv, x + value - address);
+ Valtype addend = elfcpp::Swap<valsize, big_endian>::readval(wv);
+ value = value + addend - address;
+ elfcpp::Swap<valsize, big_endian>::writeval(wv, value);
+ return check_overflow<valsize>(value, check);
+ }
+
+ // Like the above but for relocs at unaligned addresses.
+ template<int valsize>
+ static inline Reloc_status
+ pcrel_unaligned(unsigned char* view, Address value, Address address,
+ Overflow_check check)
+ {
+ typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
+ Valtype addend = elfcpp::Swap_unaligned<valsize, big_endian>::readval(view);
+ value = value + addend - address;
+ elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, value);
+ return check_overflow<valsize>(value, check);
}
// Do a simple PC relative relocation with a Symbol_value with the
// addend in the section contents. VALSIZE is the size of the
// value.
template<int valsize>
- static inline void
+ static inline Reloc_status
pcrel(unsigned char* view,
- const Sized_relobj<size, big_endian>* object,
+ const Sized_relobj_file<size, big_endian>* object,
const Symbol_value<size>* psymval,
- typename elfcpp::Elf_types<size>::Elf_Addr address)
+ Address address,
+ Overflow_check check)
{
typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
Valtype* wv = reinterpret_cast<Valtype*>(view);
- Valtype x = elfcpp::Swap<valsize, big_endian>::readval(wv);
- x = psymval->value(object, x);
- elfcpp::Swap<valsize, big_endian>::writeval(wv, x - address);
+ Valtype addend = elfcpp::Swap<valsize, big_endian>::readval(wv);
+ Address value = psymval->value(object, addend) - address;
+ elfcpp::Swap<valsize, big_endian>::writeval(wv, value);
+ return check_overflow<valsize>(value, check);
}
// Do a simple PC relative relocation with the addend in the
// relocation. VALSIZE is the size of the value.
template<int valsize>
- static inline void
- pcrela(unsigned char* view,
- typename elfcpp::Swap<valsize, big_endian>::Valtype value,
- typename elfcpp::Swap<valsize, big_endian>::Valtype addend,
- typename elfcpp::Elf_types<size>::Elf_Addr address)
+ static inline Reloc_status
+ pcrela(unsigned char* view, Address value, Addendtype addend, Address address,
+ Overflow_check check)
{
typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
Valtype* wv = reinterpret_cast<Valtype*>(view);
- elfcpp::Swap<valsize, big_endian>::writeval(wv, value + addend - address);
+ value = value + addend - address;
+ elfcpp::Swap<valsize, big_endian>::writeval(wv, value);
+ return check_overflow<valsize>(value, check);
}
// Do a simple PC relative relocation with a Symbol_value with the
// addend in the relocation. VALSIZE is the size of the value.
template<int valsize>
- static inline void
+ static inline Reloc_status
pcrela(unsigned char* view,
- const Sized_relobj<size, big_endian>* object,
+ const Sized_relobj_file<size, big_endian>* object,
const Symbol_value<size>* psymval,
- typename elfcpp::Swap<valsize, big_endian>::Valtype addend,
- typename elfcpp::Elf_types<size>::Elf_Addr address)
+ Addendtype addend,
+ Address address,
+ Overflow_check check)
{
typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
Valtype* wv = reinterpret_cast<Valtype*>(view);
- Valtype x = psymval->value(object, addend);
- elfcpp::Swap<valsize, big_endian>::writeval(wv, x - address);
+ Address value = psymval->value(object, addend) - address;
+ elfcpp::Swap<valsize, big_endian>::writeval(wv, value);
+ return check_overflow<valsize>(value, check);
}
typedef Relocate_functions<size, big_endian> This;
-public:
+ public:
// Do a simple 8-bit REL relocation with the addend in the section
// contents.
static inline void
- rel8(unsigned char* view, unsigned char value)
- { This::template rel<8>(view, value); }
+ rel8(unsigned char* view, Address value)
+ { This::template rel<8>(view, value, CHECK_NONE); }
+
+ static inline Reloc_status
+ rel8_check(unsigned char* view, Address value, Overflow_check check)
+ { return This::template rel<8>(view, value, check); }
static inline void
rel8(unsigned char* view,
- const Sized_relobj<size, big_endian>* object,
+ const Sized_relobj_file<size, big_endian>* object,
const Symbol_value<size>* psymval)
- { This::template rel<8>(view, object, psymval); }
+ { This::template rel<8>(view, object, psymval, CHECK_NONE); }
+
+ static inline Reloc_status
+ rel8_check(unsigned char* view,
+ const Sized_relobj_file<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ Overflow_check check)
+ { return This::template rel<8>(view, object, psymval, check); }
// Do an 8-bit RELA relocation with the addend in the relocation.
static inline void
- rela8(unsigned char* view, unsigned char value, unsigned char addend)
- { This::template rela<8>(view, value, addend); }
+ rela8(unsigned char* view, Address value, Addendtype addend)
+ { This::template rela<8>(view, value, addend, CHECK_NONE); }
+
+ static inline Reloc_status
+ rela8_check(unsigned char* view, Address value, Addendtype addend,
+ Overflow_check check)
+ { return This::template rela<8>(view, value, addend, check); }
static inline void
rela8(unsigned char* view,
- const Sized_relobj<size, big_endian>* object,
+ const Sized_relobj_file<size, big_endian>* object,
const Symbol_value<size>* psymval,
- unsigned char addend)
- { This::template rela<8>(view, object, psymval, addend); }
+ Addendtype addend)
+ { This::template rela<8>(view, object, psymval, addend, CHECK_NONE); }
+
+ static inline Reloc_status
+ rela8_check(unsigned char* view,
+ const Sized_relobj_file<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ Addendtype addend,
+ Overflow_check check)
+ { return This::template rela<8>(view, object, psymval, addend, check); }
// Do a simple 8-bit PC relative relocation with the addend in the
// section contents.
static inline void
- pcrel8(unsigned char* view, unsigned char value,
- typename elfcpp::Elf_types<size>::Elf_Addr address)
- { This::template pcrel<8>(view, value, address); }
+ pcrel8(unsigned char* view, unsigned char value, Address address)
+ { This::template pcrel<8>(view, value, address, CHECK_NONE); }
+
+ static inline Reloc_status
+ pcrel8_check(unsigned char* view, unsigned char value, Address address,
+ Overflow_check check)
+ { return This::template pcrel<8>(view, value, address, check); }
static inline void
pcrel8(unsigned char* view,
- const Sized_relobj<size, big_endian>* object,
+ const Sized_relobj_file<size, big_endian>* object,
const Symbol_value<size>* psymval,
- typename elfcpp::Elf_types<size>::Elf_Addr address)
- { This::template pcrel<8>(view, object, psymval, address); }
+ Address address)
+ { This::template pcrel<8>(view, object, psymval, address, CHECK_NONE); }
+
+ static inline Reloc_status
+ pcrel8_check(unsigned char* view,
+ const Sized_relobj_file<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ Address address,
+ Overflow_check check)
+ { return This::template pcrel<8>(view, object, psymval, address, check); }
// Do a simple 8-bit PC relative RELA relocation with the addend in
// the reloc.
static inline void
- pcrela8(unsigned char* view, unsigned char value, unsigned char addend,
- typename elfcpp::Elf_types<size>::Elf_Addr address)
- { This::template pcrela<8>(view, value, addend, address); }
+ pcrela8(unsigned char* view, Address value, Addendtype addend,
+ Address address)
+ { This::template pcrela<8>(view, value, addend, address, CHECK_NONE); }
+
+ static inline Reloc_status
+ pcrela8_check(unsigned char* view, Address value, Addendtype addend,
+ Address address, Overflow_check check)
+ { return This::template pcrela<8>(view, value, addend, address, check); }
static inline void
pcrela8(unsigned char* view,
- const Sized_relobj<size, big_endian>* object,
+ const Sized_relobj_file<size, big_endian>* object,
const Symbol_value<size>* psymval,
- unsigned char addend,
- typename elfcpp::Elf_types<size>::Elf_Addr address)
- { This::template pcrela<8>(view, object, psymval, addend, address); }
+ Addendtype addend,
+ Address address)
+ { This::template pcrela<8>(view, object, psymval, addend, address,
+ CHECK_NONE); }
+
+ static inline Reloc_status
+ pcrela8_check(unsigned char* view,
+ const Sized_relobj_file<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ Addendtype addend,
+ Address address,
+ Overflow_check check)
+ { return This::template pcrela<8>(view, object, psymval, addend, address,
+ check); }
// Do a simple 16-bit REL relocation with the addend in the section
// contents.
static inline void
- rel16(unsigned char* view, elfcpp::Elf_Half value)
- { This::template rel<16>(view, value); }
+ rel16(unsigned char* view, Address value)
+ { This::template rel<16>(view, value, CHECK_NONE); }
+
+ static inline Reloc_status
+ rel16_check(unsigned char* view, Address value, Overflow_check check)
+ { return This::template rel<16>(view, value, check); }
static inline void
rel16(unsigned char* view,
- const Sized_relobj<size, big_endian>* object,
+ const Sized_relobj_file<size, big_endian>* object,
const Symbol_value<size>* psymval)
- { This::template rel<16>(view, object, psymval); }
+ { This::template rel<16>(view, object, psymval, CHECK_NONE); }
+
+ static inline Reloc_status
+ rel16_check(unsigned char* view,
+ const Sized_relobj_file<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ Overflow_check check)
+ { return This::template rel<16>(view, object, psymval, check); }
// Do an 16-bit RELA relocation with the addend in the relocation.
static inline void
- rela16(unsigned char* view, elfcpp::Elf_Half value, elfcpp::Elf_Half addend)
- { This::template rela<16>(view, value, addend); }
+ rela16(unsigned char* view, Address value, Addendtype addend)
+ { This::template rela<16>(view, value, addend, CHECK_NONE); }
+
+ static inline Reloc_status
+ rela16_check(unsigned char* view, Address value, Addendtype addend,
+ Overflow_check check)
+ { return This::template rela<16>(view, value, addend, check); }
static inline void
rela16(unsigned char* view,
- const Sized_relobj<size, big_endian>* object,
+ const Sized_relobj_file<size, big_endian>* object,
const Symbol_value<size>* psymval,
- elfcpp::Elf_Half addend)
- { This::template rela<16>(view, object, psymval, addend); }
+ Addendtype addend)
+ { This::template rela<16>(view, object, psymval, addend, CHECK_NONE); }
+
+ static inline Reloc_status
+ rela16_check(unsigned char* view,
+ const Sized_relobj_file<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ Addendtype addend,
+ Overflow_check check)
+ { return This::template rela<16>(view, object, psymval, addend, check); }
// Do a simple 16-bit PC relative REL relocation with the addend in
// the section contents.
static inline void
- pcrel16(unsigned char* view, elfcpp::Elf_Half value,
- typename elfcpp::Elf_types<size>::Elf_Addr address)
- { This::template pcrel<16>(view, value, address); }
+ pcrel16(unsigned char* view, Address value, Address address)
+ { This::template pcrel<16>(view, value, address, CHECK_NONE); }
+
+ static inline Reloc_status
+ pcrel16_check(unsigned char* view, Address value, Address address,
+ Overflow_check check)
+ { return This::template pcrel<16>(view, value, address, check); }
static inline void
pcrel16(unsigned char* view,
- const Sized_relobj<size, big_endian>* object,
+ const Sized_relobj_file<size, big_endian>* object,
const Symbol_value<size>* psymval,
- typename elfcpp::Elf_types<size>::Elf_Addr address)
- { This::template pcrel<16>(view, object, psymval, address); }
+ Address address)
+ { This::template pcrel<16>(view, object, psymval, address, CHECK_NONE); }
+
+ static inline Reloc_status
+ pcrel16_check(unsigned char* view,
+ const Sized_relobj_file<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ Address address,
+ Overflow_check check)
+ { return This::template pcrel<16>(view, object, psymval, address, check); }
// Do a simple 16-bit PC relative RELA relocation with the addend in
// the reloc.
static inline void
- pcrela16(unsigned char* view, elfcpp::Elf_Half value,
- elfcpp::Elf_Half addend,
- typename elfcpp::Elf_types<size>::Elf_Addr address)
- { This::template pcrela<16>(view, value, addend, address); }
+ pcrela16(unsigned char* view, Address value, Addendtype addend,
+ Address address)
+ { This::template pcrela<16>(view, value, addend, address, CHECK_NONE); }
+
+ static inline Reloc_status
+ pcrela16_check(unsigned char* view, Address value, Addendtype addend,
+ Address address, Overflow_check check)
+ { return This::template pcrela<16>(view, value, addend, address, check); }
static inline void
pcrela16(unsigned char* view,
- const Sized_relobj<size, big_endian>* object,
+ const Sized_relobj_file<size, big_endian>* object,
const Symbol_value<size>* psymval,
- elfcpp::Elf_Half addend,
- typename elfcpp::Elf_types<size>::Elf_Addr address)
- { This::template pcrela<16>(view, object, psymval, addend, address); }
+ Addendtype addend,
+ Address address)
+ { This::template pcrela<16>(view, object, psymval, addend, address,
+ CHECK_NONE); }
+
+ static inline Reloc_status
+ pcrela16_check(unsigned char* view,
+ const Sized_relobj_file<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ Addendtype addend,
+ Address address,
+ Overflow_check check)
+ { return This::template pcrela<16>(view, object, psymval, addend, address,
+ check); }
// Do a simple 32-bit REL relocation with the addend in the section
// contents.
static inline void
- rel32(unsigned char* view, elfcpp::Elf_Word value)
- { This::template rel<32>(view, value); }
+ rel32(unsigned char* view, Address value)
+ { This::template rel<32>(view, value, CHECK_NONE); }
+
+ static inline Reloc_status
+ rel32_check(unsigned char* view, Address value, Overflow_check check)
+ { return This::template rel<32>(view, value, check); }
+
+ // Like above but for relocs at unaligned addresses.
+ static inline void
+ rel32_unaligned(unsigned char* view, Address value)
+ { This::template rel_unaligned<32>(view, value, CHECK_NONE); }
+
+ static inline Reloc_status
+ rel32_unaligned_check(unsigned char* view, Address value,
+ Overflow_check check)
+ { return This::template rel_unaligned<32>(view, value, check); }
static inline void
rel32(unsigned char* view,
- const Sized_relobj<size, big_endian>* object,
+ const Sized_relobj_file<size, big_endian>* object,
const Symbol_value<size>* psymval)
- { This::template rel<32>(view, object, psymval); }
+ { This::template rel<32>(view, object, psymval, CHECK_NONE); }
- // Do an 32-bit RELA relocation with the addend in the relocation.
+ static inline Reloc_status
+ rel32_check(unsigned char* view,
+ const Sized_relobj_file<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ Overflow_check check)
+ { return This::template rel<32>(view, object, psymval, check); }
+
+ // Like above but for relocs at unaligned addresses.
+ static inline void
+ rel32_unaligned(unsigned char* view,
+ const Sized_relobj_file<size, big_endian>* object,
+ const Symbol_value<size>* psymval)
+ { This::template rel_unaligned<32>(view, object, psymval, CHECK_NONE); }
+
+ static inline Reloc_status
+ rel32_unaligned_check(unsigned char* view,
+ const Sized_relobj_file<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ Overflow_check check)
+ { return This::template rel_unaligned<32>(view, object, psymval, check); }
+
+ // Do a 32-bit RELA relocation with the addend in the relocation.
static inline void
- rela32(unsigned char* view, elfcpp::Elf_Word value, elfcpp::Elf_Word addend)
- { This::template rela<32>(view, value, addend); }
+ rela32(unsigned char* view, Address value, Addendtype addend)
+ { This::template rela<32>(view, value, addend, CHECK_NONE); }
+
+ static inline Reloc_status
+ rela32(unsigned char* view, Address value, Addendtype addend,
+ Overflow_check check)
+ { return This::template rela<32>(view, value, addend, check); }
static inline void
rela32(unsigned char* view,
- const Sized_relobj<size, big_endian>* object,
+ const Sized_relobj_file<size, big_endian>* object,
const Symbol_value<size>* psymval,
- elfcpp::Elf_Word addend)
- { This::template rela<32>(view, object, psymval, addend); }
+ Addendtype addend)
+ { This::template rela<32>(view, object, psymval, addend, CHECK_NONE); }
+
+ static inline Reloc_status
+ rela32_check(unsigned char* view,
+ const Sized_relobj_file<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ Addendtype addend,
+ Overflow_check check)
+ { return This::template rela<32>(view, object, psymval, addend, check); }
// Do a simple 32-bit PC relative REL relocation with the addend in
// the section contents.
static inline void
- pcrel32(unsigned char* view, elfcpp::Elf_Word value,
- typename elfcpp::Elf_types<size>::Elf_Addr address)
- { This::template pcrel<32>(view, value, address); }
+ pcrel32(unsigned char* view, Address value, Address address)
+ { This::template pcrel<32>(view, value, address, CHECK_NONE); }
+
+ static inline Reloc_status
+ pcrel32_check(unsigned char* view, Address value, Address address,
+ Overflow_check check)
+ { return This::template pcrel<32>(view, value, address, check); }
+
+ // Unaligned version of the above.
+ static inline void
+ pcrel32_unaligned(unsigned char* view, Address value, Address address)
+ { This::template pcrel_unaligned<32>(view, value, address, CHECK_NONE); }
+
+ static inline Reloc_status
+ pcrel32_unaligned_check(unsigned char* view, Address value, Address address,
+ Overflow_check check)
+ { return This::template pcrel_unaligned<32>(view, value, address, check); }
static inline void
pcrel32(unsigned char* view,
- const Sized_relobj<size, big_endian>* object,
+ const Sized_relobj_file<size, big_endian>* object,
const Symbol_value<size>* psymval,
- typename elfcpp::Elf_types<size>::Elf_Addr address)
- { This::template pcrel<32>(view, object, psymval, address); }
+ Address address)
+ { This::template pcrel<32>(view, object, psymval, address, CHECK_NONE); }
+
+ static inline Reloc_status
+ pcrel32_check(unsigned char* view,
+ const Sized_relobj_file<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ Address address,
+ Overflow_check check)
+ { return This::template pcrel<32>(view, object, psymval, address, check); }
// Do a simple 32-bit PC relative RELA relocation with the addend in
// the relocation.
static inline void
- pcrela32(unsigned char* view, elfcpp::Elf_Word value,
- elfcpp::Elf_Word addend,
- typename elfcpp::Elf_types<size>::Elf_Addr address)
- { This::template pcrela<32>(view, value, addend, address); }
+ pcrela32(unsigned char* view, Address value, Addendtype addend,
+ Address address)
+ { This::template pcrela<32>(view, value, addend, address, CHECK_NONE); }
+
+ static inline Reloc_status
+ pcrela32_check(unsigned char* view, Address value, Addendtype addend,
+ Address address, Overflow_check check)
+ { return This::template pcrela<32>(view, value, addend, address, check); }
static inline void
pcrela32(unsigned char* view,
- const Sized_relobj<size, big_endian>* object,
+ const Sized_relobj_file<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ Addendtype addend,
+ Address address)
+ { This::template pcrela<32>(view, object, psymval, addend, address,
+ CHECK_NONE); }
+
+ static inline Reloc_status
+ pcrela32_check(unsigned char* view,
+ const Sized_relobj_file<size, big_endian>* object,
const Symbol_value<size>* psymval,
- elfcpp::Elf_Word addend,
- typename elfcpp::Elf_types<size>::Elf_Addr address)
- { This::template pcrela<32>(view, object, psymval, addend, address); }
+ Addendtype addend,
+ Address address,
+ Overflow_check check)
+ { return This::template pcrela<32>(view, object, psymval, addend, address,
+ check); }
// Do a simple 64-bit REL relocation with the addend in the section
// contents.
static inline void
- rel64(unsigned char* view, elfcpp::Elf_Xword value)
- { This::template rel<64>(view, value); }
+ rel64(unsigned char* view, Address value)
+ { This::template rel<64>(view, value, CHECK_NONE); }
static inline void
rel64(unsigned char* view,
- const Sized_relobj<size, big_endian>* object,
+ const Sized_relobj_file<size, big_endian>* object,
const Symbol_value<size>* psymval)
- { This::template rel<64>(view, object, psymval); }
+ { This::template rel<64>(view, object, psymval, CHECK_NONE); }
// Do a 64-bit RELA relocation with the addend in the relocation.
static inline void
- rela64(unsigned char* view, elfcpp::Elf_Xword value,
- elfcpp::Elf_Xword addend)
- { This::template rela<64>(view, value, addend); }
+ rela64(unsigned char* view, Address value, Addendtype addend)
+ { This::template rela<64>(view, value, addend, CHECK_NONE); }
static inline void
rela64(unsigned char* view,
- const Sized_relobj<size, big_endian>* object,
+ const Sized_relobj_file<size, big_endian>* object,
const Symbol_value<size>* psymval,
- elfcpp::Elf_Xword addend)
- { This::template rela<64>(view, object, psymval, addend); }
+ Addendtype addend)
+ { This::template rela<64>(view, object, psymval, addend, CHECK_NONE); }
// Do a simple 64-bit PC relative REL relocation with the addend in
// the section contents.
static inline void
- pcrel64(unsigned char* view, elfcpp::Elf_Xword value,
- typename elfcpp::Elf_types<size>::Elf_Addr address)
- { This::template pcrel<64>(view, value, address); }
+ pcrel64(unsigned char* view, Address value, Address address)
+ { This::template pcrel<64>(view, value, address, CHECK_NONE); }
static inline void
pcrel64(unsigned char* view,
- const Sized_relobj<size, big_endian>* object,
+ const Sized_relobj_file<size, big_endian>* object,
const Symbol_value<size>* psymval,
- typename elfcpp::Elf_types<size>::Elf_Addr address)
- { This::template pcrel<64>(view, object, psymval, address); }
+ Address address)
+ { This::template pcrel<64>(view, object, psymval, address, CHECK_NONE); }
// Do a simple 64-bit PC relative RELA relocation with the addend in
// the relocation.
static inline void
- pcrela64(unsigned char* view, elfcpp::Elf_Xword value,
- elfcpp::Elf_Xword addend,
- typename elfcpp::Elf_types<size>::Elf_Addr address)
- { This::template pcrela<64>(view, value, addend, address); }
+ pcrela64(unsigned char* view, Address value, Addendtype addend,
+ Address address)
+ { This::template pcrela<64>(view, value, addend, address, CHECK_NONE); }
static inline void
pcrela64(unsigned char* view,
- const Sized_relobj<size, big_endian>* object,
+ const Sized_relobj_file<size, big_endian>* object,
const Symbol_value<size>* psymval,
- elfcpp::Elf_Xword addend,
- typename elfcpp::Elf_types<size>::Elf_Addr address)
- { This::template pcrela<64>(view, object, psymval, addend, address); }
+ Addendtype addend,
+ Address address)
+ { This::template pcrela<64>(view, object, psymval, addend, address,
+ CHECK_NONE); }
+};
+
+// Convenience class for min and max values of a given BITS length.
+
+template<int bits>
+class Limits
+{
+ public:
+ static const uint64_t MAX_UNSIGNED = (1ULL << bits) - 1;
+ static const int64_t MAX_SIGNED = MAX_UNSIGNED >> 1;
+ static const int64_t MIN_SIGNED = -MAX_SIGNED - 1;
+};
+
+template<>
+class Limits<64>
+{
+ public:
+ static const uint64_t MAX_UNSIGNED = ~0ULL;
+ static const int64_t MAX_SIGNED = MAX_UNSIGNED >> 1;
+ static const int64_t MIN_SIGNED = -MAX_SIGNED - 1;
+};
+
+// Integer manipulation functions used by various targets when
+// performing relocations.
+
+template<int bits>
+class Bits
+{
+ public:
+ // Sign extend an n-bit unsigned integer stored in a uint32_t into
+ // an int32_t. BITS must be between 1 and 32.
+ static inline int32_t
+ sign_extend32(uint32_t val)
+ {
+ gold_assert(bits > 0 && bits <= 32);
+ if (bits == 32)
+ return static_cast<int32_t>(val);
+ uint32_t mask = (~static_cast<uint32_t>(0)) >> (32 - bits);
+ val &= mask;
+ uint32_t top_bit = 1U << (bits - 1);
+ int32_t as_signed = static_cast<int32_t>(val);
+ if ((val & top_bit) != 0)
+ as_signed -= static_cast<int32_t>(top_bit * 2);
+ return as_signed;
+ }
+
+ // Return true if VAL (stored in a uint32_t) has overflowed a signed
+ // value with BITS bits.
+ static inline bool
+ has_overflow32(uint32_t val)
+ {
+ gold_assert(bits > 0 && bits <= 32);
+ if (bits == 32)
+ return false;
+ const int32_t max = static_cast<int32_t>(Limits<bits>::MAX_SIGNED);
+ const int32_t min = static_cast<int32_t>(Limits<bits>::MIN_SIGNED);
+ int32_t as_signed = static_cast<int32_t>(val);
+ return as_signed > max || as_signed < min;
+ }
+
+ // Return true if VAL (stored in a uint32_t) has overflowed an unsigned
+ // value with BITS bits.
+ static inline bool
+ has_unsigned_overflow32(uint32_t val)
+ {
+ gold_assert(bits > 0 && bits <= 32);
+ if (bits == 32)
+ return false;
+ const uint32_t max = static_cast<uint32_t>(Limits<bits>::MAX_UNSIGNED);
+ return val > max;
+ }
+
+ // Return true if VAL (stored in a uint32_t) has overflowed both a
+ // signed and an unsigned value. E.g.,
+ // Bits<8>::has_signed_unsigned_overflow32 would check -128 <= VAL <
+ // 255.
+ static inline bool
+ has_signed_unsigned_overflow32(uint32_t val)
+ {
+ gold_assert(bits > 0 && bits <= 32);
+ if (bits == 32)
+ return false;
+ const int32_t max = static_cast<int32_t>(Limits<bits>::MAX_UNSIGNED);
+ const int32_t min = static_cast<int32_t>(Limits<bits>::MIN_SIGNED);
+ int32_t as_signed = static_cast<int32_t>(val);
+ return as_signed > max || as_signed < min;
+ }
+
+ // Select bits from A and B using bits in MASK. For each n in
+ // [0..31], the n-th bit in the result is chosen from the n-th bits
+ // of A and B. A zero selects A and a one selects B.
+ static inline uint32_t
+ bit_select32(uint32_t a, uint32_t b, uint32_t mask)
+ { return (a & ~mask) | (b & mask); }
+
+ // Sign extend an n-bit unsigned integer stored in a uint64_t into
+ // an int64_t. BITS must be between 1 and 64.
+ static inline int64_t
+ sign_extend(uint64_t val)
+ {
+ gold_assert(bits > 0 && bits <= 64);
+ if (bits == 64)
+ return static_cast<int64_t>(val);
+ uint64_t mask = (~static_cast<uint64_t>(0)) >> (64 - bits);
+ val &= mask;
+ uint64_t top_bit = static_cast<uint64_t>(1) << (bits - 1);
+ int64_t as_signed = static_cast<int64_t>(val);
+ if ((val & top_bit) != 0)
+ as_signed -= static_cast<int64_t>(top_bit * 2);
+ return as_signed;
+ }
+
+ // Return true if VAL (stored in a uint64_t) has overflowed a signed
+ // value with BITS bits.
+ static inline bool
+ has_overflow(uint64_t val)
+ {
+ gold_assert(bits > 0 && bits <= 64);
+ if (bits == 64)
+ return false;
+ const int64_t max = Limits<bits>::MAX_SIGNED;
+ const int64_t min = Limits<bits>::MIN_SIGNED;
+ int64_t as_signed = static_cast<int64_t>(val);
+ return as_signed > max || as_signed < min;
+ }
+
+ // Return true if VAL (stored in a uint64_t) has overflowed an unsigned
+ // value with BITS bits.
+ static inline bool
+ has_unsigned_overflow(uint64_t val)
+ {
+ gold_assert(bits > 0 && bits <= 64);
+ if (bits == 64)
+ return false;
+ const uint64_t max = Limits<bits>::MAX_UNSIGNED;
+ return val > max;
+ }
+
+ // Return true if VAL (stored in a uint64_t) has overflowed both a
+ // signed and an unsigned value. E.g.,
+ // Bits<8>::has_signed_unsigned_overflow would check -128 <= VAL <
+ // 255.
+ static inline bool
+ has_signed_unsigned_overflow64(uint64_t val)
+ {
+ gold_assert(bits > 0 && bits <= 64);
+ if (bits == 64)
+ return false;
+ const int64_t max = static_cast<int64_t>(Limits<bits>::MAX_UNSIGNED);
+ const int64_t min = Limits<bits>::MIN_SIGNED;
+ int64_t as_signed = static_cast<int64_t>(val);
+ return as_signed > max || as_signed < min;
+ }
+
+ // Select bits from A and B using bits in MASK. For each n in
+ // [0..31], the n-th bit in the result is chosen from the n-th bits
+ // of A and B. A zero selects A and a one selects B.
+ static inline uint64_t
+ bit_select64(uint64_t a, uint64_t b, uint64_t mask)
+ { return (a & ~mask) | (b & mask); }
};
// Track relocations while reading a section. This lets you ask for
unsigned int reloc_type);
// Return the offset in the data section to which the next reloc
- // applies. THis returns -1 if there is no next reloc.
+ // applies. This returns -1 if there is no next reloc.
off_t
next_offset() const;
unsigned int
next_symndx() const;
+ // Return the addend of the next reloc. This returns 0 if there is
+ // no next reloc.
+ uint64_t
+ next_addend() const;
+
// Advance to OFFSET within the data section, and return the number
// of relocs which would be skipped.
int
advance(off_t offset);
+ // Checkpoint the current position in the reloc section.
+ section_size_type
+ checkpoint() const
+ { return this->pos_; }
+
+ // Reset the position to CHECKPOINT.
+ void
+ reset(section_size_type checkpoint)
+ { this->pos_ = checkpoint; }
+
private:
// The contents of the input object's reloc section.
const unsigned char* prelocs_;
projects / thirdparty / binutils-gdb.git / blobdiff