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[RFC PATCH]: Sparc gold support
- From: David Miller <davem at davemloft dot net>
- To: binutils at sourceware dot org
- Date: Fri, 11 Apr 2008 15:48:28 -0700 (PDT)
- Subject: [RFC PATCH]: Sparc gold support
Here is a request for comments posting of my gold support patch. I
know it needs some work.
Firstly I know the gold/configure* aren't right. What I want to be
able to say is that if you ask for the sparc target, we need to enable
support for both endiannesses and both 32-bit and 64-bit support.
Any suggestions?
Next, there is a .bss alignment hack in the copy reloc handling
of the sparc target. As indicated in the comment it is only there
until the .bss alignment bug I reported two days ago gets
worked out.
Finally, I realize that the sparc target class is heavily
templated and needs to be improved as it generates a lot of
code currently. Either I can do some specializations, some
abstract base class scheme, or some combination of the two.
In particular in this area, I am looking for suggestions.
On sparc-unknown-linux-gnu all gold test cases pass.
On sparc64-unknown-linux-gnu the non-pic shared test cases fail, but I
know why and am investigating a way to handle it. Although, as I
mentioned the other day, the BFD linker gets these cases wrong so my
gold sparc target is bug compatible :-)
Anyways, looking forward to the feedback.
Thanks!
toplevel/
2008-04-11 David S. Miller <davem@davemloft.net>
* configure.ac: Add sparc*-*-* to gold supported targets.
* configure: Regenerate.
Index: configure
===================================================================
RCS file: /cvs/src/src/configure,v
retrieving revision 1.293
diff -u -p -r1.293 configure
--- configure 4 Apr 2008 11:45:58 -0000 1.293
+++ configure 11 Apr 2008 22:41:23 -0000
@@ -2048,7 +2048,7 @@ if test "${ENABLE_GOLD}" = "yes"; then
if test "$is_elf" = "yes"; then
# Check for target supported by gold.
case "${target}" in
- i?86-*-* | x86_64-*-*)
+ i?86-*-* | x86_64-*-* | sparc*-*-*)
configdirs="`echo " ${configdirs} " | sed -e 's/ ld / gold /'`"
;;
esac
Index: configure.ac
===================================================================
RCS file: /cvs/src/src/configure.ac,v
retrieving revision 1.41
diff -u -p -r1.41 configure.ac
--- configure.ac 4 Apr 2008 11:45:58 -0000 1.41
+++ configure.ac 11 Apr 2008 22:41:23 -0000
@@ -316,7 +316,7 @@ if test "${ENABLE_GOLD}" = "yes"; then
if test "$is_elf" = "yes"; then
# Check for target supported by gold.
case "${target}" in
- i?86-*-* | x86_64-*-*)
+ i?86-*-* | x86_64-*-* | sparc*-*-*)
configdirs="`echo " ${configdirs} " | sed -e 's/ ld / gold /'`"
;;
esac
gold/
2008-04-11 David S. Miller <davem@davemloft.net>
* sparc.cc: New file.
* Makefile.am (TARGETSOURCES): Add sparc.cc
(ALL_TARGETOBJS): Add sparc.$(OBJEXT)
* Makefile.in: Rebuild.
* configure.tgt: Add entries for sparc-* and sparc64-*
--- /dev/null 2008-03-03 20:22:44.000000000 -0800
+++ sparc.cc 2008-04-11 15:34:50.000000000 -0700
@@ -0,0 +1,2894 @@
+// sparc.cc -- sparc target support for gold.
+
+// Copyright 2008 Free Software Foundation, Inc.
+// Written by David S. Miller <davem@davemloft.net>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+#include "gold.h"
+
+#include <cstdlib>
+#include <cstdio>
+#include <cstring>
+
+#include "elfcpp.h"
+#include "parameters.h"
+#include "reloc.h"
+#include "sparc.h"
+#include "object.h"
+#include "symtab.h"
+#include "layout.h"
+#include "output.h"
+#include "target.h"
+#include "target-reloc.h"
+#include "target-select.h"
+#include "tls.h"
+#include "errors.h"
+
+namespace
+{
+
+using namespace gold;
+
+template<int size, bool big_endian>
+class Output_data_plt_sparc;
+
+template<int size, bool big_endian>
+class Target_sparc : public Sized_target<size, big_endian>
+{
+ public:
+ typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section;
+
+ Target_sparc()
+ : Sized_target<size, big_endian>(&sparc_info),
+ got_(NULL), plt_(NULL), rela_dyn_(NULL),
+ copy_relocs_(NULL), dynbss_(NULL), got_mod_index_offset_(-1U),
+ tls_get_addr_sym_(NULL)
+ {
+ }
+
+ // Scan the relocations to look for symbol adjustments.
+ void
+ scan_relocs(const General_options& options,
+ Symbol_table* symtab,
+ Layout* layout,
+ Sized_relobj<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);
+ // Finalize the sections.
+ void
+ do_finalize_sections(Layout*);
+
+ // Return the value to use for a dynamic which requires special
+ // treatment.
+ uint64_t
+ do_dynsym_value(const Symbol*) const;
+
+ // Relocate a section.
+ void
+ relocate_section(const Relocate_info<size, big_endian>*,
+ unsigned int sh_type,
+ const unsigned char* prelocs,
+ size_t reloc_count,
+ Output_section* output_section,
+ bool needs_special_offset_handling,
+ unsigned char* view,
+ typename elfcpp::Elf_types<size>::Elf_Addr view_address,
+ section_size_type view_size);
+
+ // Scan the relocs during a relocatable link.
+ void
+ scan_relocatable_relocs(const General_options& options,
+ Symbol_table* symtab,
+ Layout* layout,
+ Sized_relobj<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,
+ Relocatable_relocs*);
+
+ // Relocate a section during a relocatable link.
+ 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);
+ // Return whether SYM is defined by the ABI.
+ bool
+ do_is_defined_by_abi(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 the size of the GOT section.
+ section_size_type
+ got_size()
+ {
+ gold_assert(this->got_ != NULL);
+ return this->got_->data_size();
+ }
+
+ private:
+
+ // The class which scans relocations.
+ struct Scan
+ {
+ inline void
+ local(const General_options& options, Symbol_table* symtab,
+ Layout* layout, Target_sparc* target,
+ Sized_relobj<size, big_endian>* object,
+ 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);
+
+ inline void
+ global(const General_options& options, Symbol_table* symtab,
+ Layout* layout, Target_sparc* target,
+ Sized_relobj<size, big_endian>* object,
+ unsigned int data_shndx,
+ Output_section* output_section,
+ const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
+ Symbol* gsym);
+
+ static void
+ unsupported_reloc_local(Sized_relobj<size, big_endian>*,
+ unsigned int r_type);
+
+ static void
+ unsupported_reloc_global(Sized_relobj<size, big_endian>*,
+ unsigned int r_type, Symbol*);
+
+ static void
+ generate_tls_call(Symbol_table* symtab, Layout* layout,
+ Target_sparc* target);
+ };
+
+ // The class which implements relocation.
+ class Relocate
+ {
+ public:
+ Relocate()
+ : ignore_gd_add_(false)
+ { }
+
+ ~Relocate()
+ {
+ if (this->ignore_gd_add_)
+ {
+ // FIXME: This needs to specify the location somehow.
+ gold_error(_("missing expected TLS relocation"));
+ }
+ }
+
+ // 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*,
+ 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,
+ 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>&,
+ unsigned int r_type, const Sized_symbol<size>*,
+ const Symbol_value<size>*,
+ unsigned char*,
+ typename elfcpp::Elf_types<size>::Elf_Addr,
+ section_size_type);
+
+ // Ignore the next relocation which should be R_SPARC_TLS_GD_ADD
+ bool ignore_gd_add_;
+ };
+
+ // 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*);
+
+ // Create a PLT entry for a global symbol.
+ void
+ make_plt_entry(Symbol_table*, Layout*, Symbol*);
+
+ // Create a GOT entry for the TLS module index.
+ unsigned int
+ got_mod_index_entry(Symbol_table* symtab, Layout* layout,
+ Sized_relobj<size, big_endian>* object);
+
+ // Return the gsym for "__tls_get_addr". Cache if not already
+ // cached.
+ Symbol*
+ tls_get_addr_sym(Symbol_table* symtab)
+ {
+ if (!this->tls_get_addr_sym_)
+ this->tls_get_addr_sym_ = symtab->lookup("__tls_get_addr", NULL);
+ gold_assert(this->tls_get_addr_sym_);
+ return this->tls_get_addr_sym_;
+ }
+
+ // Get the PLT section.
+ const Output_data_plt_sparc<size, big_endian>*
+ plt_section() const
+ {
+ gold_assert(this->plt_ != NULL);
+ return this->plt_;
+ }
+
+ // Get the dynamic reloc section, creating it if necessary.
+ Reloc_section*
+ rela_dyn_section(Layout*);
+
+ // Return true if the symbol may need a COPY relocation.
+ // References from an executable object to non-function symbols
+ // defined in a dynamic object may need a COPY relocation.
+ bool
+ may_need_copy_reloc(Symbol* gsym)
+ {
+ return (!parameters->options().shared()
+ && gsym->is_from_dynobj()
+ && gsym->type() != elfcpp::STT_FUNC);
+ }
+
+ // Copy a relocation against a global symbol.
+ void
+ copy_reloc(const General_options*, Symbol_table*, Layout*,
+ Sized_relobj<size, big_endian>*, unsigned int,
+ Output_section*, Symbol*, const elfcpp::Rela<size, big_endian>&);
+
+ // Information about this specific target which we pass to the
+ // general Target structure.
+ static Target::Target_info sparc_info;
+
+ // The types of GOT entries needed for this platform.
+ enum Got_type
+ {
+ GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol
+ GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset
+ GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair
+ };
+
+ // The GOT section.
+ Output_data_got<size, big_endian>* got_;
+ // The PLT section.
+ Output_data_plt_sparc<size, big_endian>* plt_;
+ // The dynamic reloc section.
+ Reloc_section* rela_dyn_;
+ // Relocs saved to avoid a COPY reloc.
+ Copy_relocs<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
+ Symbol* tls_get_addr_sym_;
+};
+
+template<>
+Target::Target_info Target_sparc<32, true>::sparc_info =
+{
+ 32, // size
+ true, // is_big_endian
+ elfcpp::EM_SPARC, // machine_code
+ false, // has_make_symbol
+ false, // has_resolve
+ false, // has_code_fill
+ true, // is_default_stack_executable
+ '\0', // wrap_char
+ "/usr/lib/ld.so.1", // dynamic_linker
+ 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)
+};
+
+template<>
+Target::Target_info Target_sparc<64, true>::sparc_info =
+{
+ 64, // size
+ true, // is_big_endian
+ elfcpp::EM_SPARCV9, // machine_code
+ false, // has_make_symbol
+ false, // has_resolve
+ false, // has_code_fill
+ true, // is_default_stack_executable
+ '\0', // wrap_char
+ "/usr/lib/sparcv9/ld.so.1", // dynamic_linker
+ 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)
+};
+
+// We have to take care here, even when operating in little-endian
+// mode, sparc instructions are still big endian.
+template<int size, bool big_endian>
+class Sparc_relocate_functions
+{
+private:
+ // Do a simple relocation with the addend in the relocation.
+ template<int valsize>
+ static inline void
+ rela(unsigned char* view,
+ unsigned int right_shift,
+ typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask,
+ typename elfcpp::Swap<size, big_endian>::Valtype value,
+ typename elfcpp::Swap<size, big_endian>::Valtype addend)
+ {
+ typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
+ Valtype* wv = reinterpret_cast<Valtype*>(view);
+ Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
+ Valtype reloc = ((value + addend) >> right_shift);
+
+ val &= ~dst_mask;
+ reloc &= dst_mask;
+
+ elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
+ }
+
+ // Do a simple relocation using a symbol value with the addend in
+ // the relocation.
+ template<int valsize>
+ static inline void
+ rela(unsigned char* view,
+ unsigned int right_shift,
+ typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Swap<valsize, big_endian>::Valtype addend)
+ {
+ typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
+ Valtype* wv = reinterpret_cast<Valtype*>(view);
+ Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
+ Valtype reloc = (psymval->value(object, addend) >> right_shift);
+
+ val &= ~dst_mask;
+ reloc &= dst_mask;
+
+ elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
+ }
+
+ // Do a simple relocation using a symbol value with the addend in
+ // the relocation, unaligned.
+ template<int valsize>
+ static inline void
+ rela_ua(unsigned char* view,
+ unsigned int right_shift, elfcpp::Elf_Xword dst_mask,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Swap<size, big_endian>::Valtype addend)
+ {
+ typedef typename elfcpp::Swap_unaligned<valsize,
+ big_endian>::Valtype Valtype;
+ unsigned char* wv = view;
+ Valtype val = elfcpp::Swap_unaligned<valsize, big_endian>::readval(wv);
+ Valtype reloc = (psymval->value(object, addend) >> right_shift);
+
+ val &= ~dst_mask;
+ reloc &= dst_mask;
+
+ elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, val | reloc);
+ }
+
+ // Do a simple PC relative relocation with a Symbol_value with the
+ // addend in the relocation.
+ template<int valsize>
+ static inline void
+ pcrela(unsigned char* view,
+ unsigned int right_shift,
+ typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Swap<size, big_endian>::Valtype addend,
+ typename elfcpp::Elf_types<size>::Elf_Addr address)
+ {
+ typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
+ Valtype* wv = reinterpret_cast<Valtype*>(view);
+ Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
+ Valtype reloc = ((psymval->value(object, addend) - address)
+ >> right_shift);
+
+ val &= ~dst_mask;
+ reloc &= dst_mask;
+
+ elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
+ }
+
+ template<int valsize>
+ static inline void
+ pcrela_unaligned(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Swap<size, big_endian>::Valtype addend,
+ typename elfcpp::Elf_types<size>::Elf_Addr address)
+ {
+ typedef typename elfcpp::Swap_unaligned<valsize,
+ big_endian>::Valtype Valtype;
+ unsigned char* wv = view;
+ Valtype reloc = (psymval->value(object, addend) - address);
+
+ elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, reloc);
+ }
+
+ typedef Sparc_relocate_functions<size, big_endian> This;
+ typedef Sparc_relocate_functions<size, true> This_insn;
+
+public:
+ // R_SPARC_WDISP30: (Symbol + Addend - Address) >> 2
+ static inline void
+ wdisp30(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend,
+ typename elfcpp::Elf_types<size>::Elf_Addr address)
+ {
+ This_insn::template pcrela<32>(view, 2, 0x3fffffff, object,
+ psymval, addend, address);
+ }
+
+ // R_SPARC_WDISP22: (Symbol + Addend - Address) >> 2
+ static inline void
+ wdisp22(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend,
+ typename elfcpp::Elf_types<size>::Elf_Addr address)
+ {
+ This_insn::template pcrela<32>(view, 2, 0x003fffff, object,
+ psymval, addend, address);
+ }
+
+ // R_SPARC_PC22: (Symbol + Addend - Address) >> 10
+ static inline void
+ pc22(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend,
+ typename elfcpp::Elf_types<size>::Elf_Addr address)
+ {
+ This_insn::template pcrela<32>(view, 10, 0x003fffff, object,
+ psymval, addend, address);
+ }
+
+ // R_SPARC_PC10: (Symbol + Addend - Address) & 0x3ff
+ static inline void
+ pc10(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend,
+ typename elfcpp::Elf_types<size>::Elf_Addr address)
+ {
+ This_insn::template pcrela<32>(view, 0, 0x000003ff, object,
+ psymval, addend, address);
+ }
+
+ // R_SPARC_HI22: (Symbol + Addend) >> 10
+ static inline void
+ hi22(unsigned char* view,
+ typename elfcpp::Elf_types<size>::Elf_Addr value,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ This_insn::template rela<32>(view, 10, 0x003fffff, value, addend);
+ }
+
+ // R_SPARC_HI22: (Symbol + Addend) >> 10
+ static inline void
+ hi22(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ This_insn::template rela<32>(view, 10, 0x003fffff, object, psymval, addend);
+ }
+
+ // R_SPARC_LO10: (Symbol + Addend) & 0x3ff
+ static inline void
+ lo10(unsigned char* view,
+ typename elfcpp::Elf_types<size>::Elf_Addr value,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ This_insn::template rela<32>(view, 0, 0x000003ff, value, addend);
+ }
+
+ // R_SPARC_LO10: (Symbol + Addend) & 0x3ff
+ static inline void
+ lo10(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ This_insn::template rela<32>(view, 0, 0x000003ff, object, psymval, addend);
+ }
+
+ // R_SPARC_OLO10: ((Symbol + Addend) & 0x3ff) + Addend2
+ static inline void
+ olo10(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend2)
+ {
+ typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
+ Valtype* wv = reinterpret_cast<Valtype*>(view);
+ Valtype val = elfcpp::Swap<32, true>::readval(wv);
+ Valtype reloc = psymval->value(object, addend);
+
+ val &= ~0x1fff;
+ reloc &= 0x3ff;
+ reloc += addend2;
+ reloc &= 0x1fff;
+
+ elfcpp::Swap<32, true>::writeval(wv, val | reloc);
+ }
+
+ // R_SPARC_22: (Symbol + Addend)
+ static inline void
+ rela22(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ This_insn::template rela<32>(view, 0, 0x003fffff, object, psymval, addend);
+ }
+
+ // R_SPARC_13: (Symbol + Addend)
+ static inline void
+ rela13(unsigned char* view,
+ typename elfcpp::Elf_types<size>::Elf_Addr value,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ This_insn::template rela<32>(view, 0, 0x00001fff, value, addend);
+ }
+
+ // R_SPARC_13: (Symbol + Addend)
+ static inline void
+ rela13(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ This_insn::template rela<32>(view, 0, 0x00001fff, object, psymval, addend);
+ }
+
+ // R_SPARC_UA16: (Symbol + Addend)
+ static inline void
+ ua16(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ This::template rela_ua<16>(view, 0, 0xffff, object, psymval, addend);
+ }
+
+ // R_SPARC_UA32: (Symbol + Addend)
+ static inline void
+ ua32(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ This::template rela_ua<32>(view, 0, 0xffffffff, object, psymval, addend);
+ }
+
+ // R_SPARC_UA64: (Symbol + Addend)
+ static inline void
+ ua64(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ This::template rela_ua<64>(view, 0, ~(elfcpp::Elf_Xword) 0,
+ object, psymval, addend);
+ }
+
+ // R_SPARC_DISP8: (Symbol + Addend - Address)
+ static inline void
+ disp8(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend,
+ typename elfcpp::Elf_types<size>::Elf_Addr address)
+ {
+ This::template pcrela_unaligned<8>(view, object, psymval,
+ addend, address);
+ }
+
+ // R_SPARC_DISP16: (Symbol + Addend - Address)
+ static inline void
+ disp16(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend,
+ typename elfcpp::Elf_types<size>::Elf_Addr address)
+ {
+ This::template pcrela_unaligned<16>(view, object, psymval,
+ addend, address);
+ }
+
+ // R_SPARC_DISP32: (Symbol + Addend - Address)
+ static inline void
+ disp32(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend,
+ typename elfcpp::Elf_types<size>::Elf_Addr address)
+ {
+ This::template pcrela_unaligned<32>(view, object, psymval,
+ addend, address);
+ }
+
+ // R_SPARC_DISP64: (Symbol + Addend - Address)
+ static inline void
+ disp64(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ elfcpp::Elf_Xword addend,
+ typename elfcpp::Elf_types<size>::Elf_Addr address)
+ {
+ This::template pcrela_unaligned<64>(view, object, psymval,
+ addend, address);
+ }
+
+ // R_SPARC_H44: (Symbol + Addend) >> 22
+ static inline void
+ h44(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ This_insn::template rela<32>(view, 22, 0x003fffff, object, psymval, addend);
+ }
+
+ // R_SPARC_M44: ((Symbol + Addend) >> 12) & 0x3ff
+ static inline void
+ m44(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ This_insn::template rela<32>(view, 12, 0x000003ff, object, psymval, addend);
+ }
+
+ // R_SPARC_L44: (Symbol + Addend) & 0xfff
+ static inline void
+ l44(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ This_insn::template rela<32>(view, 0, 0x00000fff, object, psymval, addend);
+ }
+
+ // R_SPARC_HH22: (Symbol + Addend) >> 42
+ static inline void
+ hh22(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ This_insn::template rela<32>(view, 42, 0x003fffff, object, psymval, addend);
+ }
+
+ // R_SPARC_HM10: ((Symbol + Addend) >> 32) & 0x3ff
+ static inline void
+ hm10(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ This_insn::template rela<32>(view, 32, 0x000003ff, object, psymval, addend);
+ }
+
+ // R_SPARC_7: (Symbol + Addend)
+ static inline void
+ rela7(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ This_insn::template rela<32>(view, 0, 0x0000007f, object, psymval, addend);
+ }
+
+ // R_SPARC_6: (Symbol + Addend)
+ static inline void
+ rela6(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ This_insn::template rela<32>(view, 0, 0x0000003f, object, psymval, addend);
+ }
+
+ // R_SPARC_5: (Symbol + Addend)
+ static inline void
+ rela5(unsigned char* view,
+ const Sized_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ This_insn::template rela<32>(view, 0, 0x0000001f, object, psymval, addend);
+ }
+
+ // R_SPARC_TLS_LDO_HIX22: @dtpoff(Symbol + Addend) >> 10
+ static inline void
+ ldo_hix22(unsigned char* view,
+ typename elfcpp::Elf_types<size>::Elf_Addr value,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ This_insn::hi22(view, value, addend);
+ }
+
+ // R_SPARC_TLS_LE_HIX22: (@tpoff(Symbol + Addend) ^ 0xffffffffffffffff) >> 10
+ static inline void
+ le_hix22(unsigned char* view,
+ typename elfcpp::Elf_types<size>::Elf_Addr value,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
+ Valtype* wv = reinterpret_cast<Valtype*>(view);
+ Valtype val = elfcpp::Swap<32, true>::readval(wv);
+ Valtype reloc = (value + addend);
+
+ val &= ~0x3fffff;
+
+ reloc ^= ~(Valtype)0;
+ reloc >>= 10;
+
+ reloc &= 0x3fffff;
+
+ elfcpp::Swap<32, true>::writeval(wv, val | reloc);
+ }
+
+ // R_SPARC_TLS_LDO_LOX10: @dtpoff(Symbol + Addend) & 0x3ff
+ static inline void
+ ldo_lox10(unsigned char* view,
+ typename elfcpp::Elf_types<size>::Elf_Addr value,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
+ Valtype* wv = reinterpret_cast<Valtype*>(view);
+ Valtype val = elfcpp::Swap<32, true>::readval(wv);
+ Valtype reloc = (value + addend);
+
+ val &= ~0x1fff;
+ reloc &= 0x3ff;
+
+ elfcpp::Swap<32, true>::writeval(wv, val | reloc);
+ }
+
+ // R_SPARC_TLS_LE_LOX10: (@tpoff(Symbol + Addend) & 0x3ff) | 0x1c00
+ static inline void
+ le_lox10(unsigned char* view,
+ typename elfcpp::Elf_types<size>::Elf_Addr value,
+ typename elfcpp::Elf_types<size>::Elf_Addr addend)
+ {
+ typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
+ Valtype* wv = reinterpret_cast<Valtype*>(view);
+ Valtype val = elfcpp::Swap<32, true>::readval(wv);
+ Valtype reloc = (value + addend);
+
+ val &= ~0x1fff;
+ reloc &= 0x3ff;
+ reloc |= 0x1c00;
+
+ elfcpp::Swap<32, true>::writeval(wv, val | reloc);
+ }
+};
+
+// Get the GOT section, creating it if necessary.
+
+template<int size, bool big_endian>
+Output_data_got<size, big_endian>*
+Target_sparc<size, big_endian>::got_section(Symbol_table* symtab,
+ Layout* layout)
+{
+ if (this->got_ == NULL)
+ {
+ gold_assert(symtab != NULL && layout != NULL);
+
+ this->got_ = new Output_data_got<size, big_endian>();
+
+ layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
+ elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
+ this->got_);
+
+ // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section.
+ symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
+ this->got_,
+ 0, 0, elfcpp::STT_OBJECT,
+ elfcpp::STB_LOCAL,
+ elfcpp::STV_HIDDEN, 0,
+ false, false);
+ }
+
+ return this->got_;
+}
+
+// Get the dynamic reloc section, creating it if necessary.
+
+template<int size, bool big_endian>
+typename Target_sparc<size, big_endian>::Reloc_section*
+Target_sparc<size, big_endian>::rela_dyn_section(Layout* layout)
+{
+ if (this->rela_dyn_ == NULL)
+ {
+ gold_assert(layout != NULL);
+ this->rela_dyn_ = new Reloc_section();
+ layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
+ elfcpp::SHF_ALLOC, this->rela_dyn_);
+ }
+ return this->rela_dyn_;
+}
+
+// A class to handle the PLT data.
+
+template<int size, bool big_endian>
+class Output_data_plt_sparc : public Output_section_data
+{
+ public:
+ typedef Output_data_reloc<elfcpp::SHT_RELA, true,
+ size, big_endian> Reloc_section;
+
+ Output_data_plt_sparc(Layout*);
+
+ // Add an entry to the PLT.
+ void add_entry(Symbol* gsym);
+
+ // Return the .rela.plt section data.
+ const Reloc_section* rel_plt() const
+ {
+ return this->rel_;
+ }
+
+ protected:
+ void do_adjust_output_section(Output_section* os);
+
+ private:
+ // The size of an entry in the PLT.
+ static const int base_plt_entry_size = (size == 32 ? 12 : 32);
+
+ static const unsigned int plt_entries_per_block = 160;
+ static const unsigned int plt_insn_chunk_size = 24;
+ static const unsigned int plt_pointer_chunk_size = 8;
+ static const unsigned int plt_block_size =
+ (plt_entries_per_block
+ * (plt_insn_chunk_size + plt_pointer_chunk_size));
+
+ // Set the final size.
+ void
+ set_final_data_size()
+ {
+ unsigned int full_count = this->count_ + 4;
+ unsigned int extra = (size == 32 ? 4 : 0);
+
+ if (size == 32 || full_count < 32768)
+ this->set_data_size((full_count * base_plt_entry_size) + extra);
+ else
+ {
+ unsigned int ext_cnt = full_count - 32768;
+
+ this->set_data_size((32768 * base_plt_entry_size)
+ + (ext_cnt
+ * (plt_insn_chunk_size
+ + plt_pointer_chunk_size)));
+ }
+ }
+
+ // Write out the PLT data.
+ void
+ do_write(Output_file*);
+
+ // The reloc section.
+ Reloc_section* rel_;
+ // The number of PLT entries.
+ unsigned int count_;
+};
+
+// Create the PLT section. The ordinary .got section is an argument,
+// since we need to refer to the start.
+
+template<int size, bool big_endian>
+Output_data_plt_sparc<size, big_endian>::Output_data_plt_sparc(Layout* layout)
+ : Output_section_data(size == 32 ? 4 : 8), count_(0)
+{
+ this->rel_ = new Reloc_section();
+ layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
+ elfcpp::SHF_ALLOC, this->rel_);
+}
+
+template<int size, bool big_endian>
+void
+Output_data_plt_sparc<size, big_endian>::do_adjust_output_section(Output_section* os)
+{
+ os->set_entsize(0);
+}
+
+// Add an entry to the PLT.
+
+template<int size, bool big_endian>
+void
+Output_data_plt_sparc<size, big_endian>::add_entry(Symbol* gsym)
+{
+ gold_assert(!gsym->has_plt_offset());
+
+ unsigned int index = this->count_ + 4;
+ section_offset_type plt_offset;
+
+ if (size == 32 || index < 32768)
+ plt_offset = index * base_plt_entry_size;
+ else
+ {
+ unsigned int ext_index = index - 32768;
+
+ plt_offset = (32768 * base_plt_entry_size)
+ + ((ext_index / plt_entries_per_block)
+ * plt_block_size)
+ + ((ext_index % plt_entries_per_block)
+ * plt_insn_chunk_size);
+ }
+
+ gsym->set_plt_offset(plt_offset);
+
+ ++this->count_;
+
+ // Every PLT entry needs a reloc.
+ gsym->set_needs_dynsym_entry();
+ this->rel_->add_global(gsym, elfcpp::R_SPARC_JMP_SLOT, this,
+ plt_offset, 0);
+
+ // Note that we don't need to save the symbol. The contents of the
+ // PLT are independent of which symbols are used. The symbols only
+ // appear in the relocations.
+}
+
+static const unsigned int sparc_nop = 0x01000000;
+static const unsigned int sparc_sethi_g1 = 0x03000000;
+static const unsigned int sparc_branch_always = 0x30800000;
+static const unsigned int sparc_branch_always_pt = 0x30680000;
+static const unsigned int sparc_mov = 0x80100000;
+static const unsigned int sparc_mov_g0_o0 = 0x90100000;
+static const unsigned int sparc_mov_o7_g5 = 0x8a10000f;
+static const unsigned int sparc_call_plus_8 = 0x40000002;
+static const unsigned int sparc_ldx_o7_imm_g1 = 0xc25be000;
+static const unsigned int sparc_jmpl_o7_g1_g1 = 0x83c3c001;
+static const unsigned int sparc_mov_g5_o7 = 0x9e100005;
+
+// Write out the PLT.
+
+template<int size, bool big_endian>
+void
+Output_data_plt_sparc<size, big_endian>::do_write(Output_file* of)
+{
+ const off_t offset = this->offset();
+ const section_size_type oview_size =
+ convert_to_section_size_type(this->data_size());
+ unsigned char* const oview = of->get_output_view(offset, oview_size);
+ unsigned char* pov = oview;
+
+ memset(pov, 0, base_plt_entry_size * 4);
+ pov += base_plt_entry_size * 4;
+
+ unsigned int plt_offset = base_plt_entry_size * 4;
+ const unsigned int count = this->count_;
+
+ if (size == 64)
+ {
+ unsigned int limit;
+
+ limit = (count > 32768 ? 32768 : count);
+
+ for (unsigned int i = 0; i < limit; ++i)
+ {
+ elfcpp::Swap<32, true>::writeval(pov + 0x00,
+ sparc_sethi_g1 + plt_offset);
+ elfcpp::Swap<32, true>::writeval(pov + 0x04,
+ sparc_branch_always_pt +
+ (((base_plt_entry_size -
+ (plt_offset + 4)) >> 2) &
+ 0x7ffff));
+ elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop);
+ elfcpp::Swap<32, true>::writeval(pov + 0x0c, sparc_nop);
+ elfcpp::Swap<32, true>::writeval(pov + 0x10, sparc_nop);
+ elfcpp::Swap<32, true>::writeval(pov + 0x14, sparc_nop);
+ elfcpp::Swap<32, true>::writeval(pov + 0x18, sparc_nop);
+ elfcpp::Swap<32, true>::writeval(pov + 0x1c, sparc_nop);
+
+ pov += base_plt_entry_size;
+ plt_offset += base_plt_entry_size;
+ }
+
+ if (count > 32768)
+ {
+ unsigned int ext_cnt = count - 32768;
+ unsigned int blks = ext_cnt / plt_entries_per_block;
+
+ for (unsigned int i = 0; i < blks; ++i)
+ {
+ unsigned int data_off = (plt_entries_per_block
+ * plt_insn_chunk_size) - 4;
+
+ for (unsigned int j = 0; j < plt_entries_per_block; ++j)
+ {
+ elfcpp::Swap<32, true>::writeval(pov + 0x00,
+ sparc_mov_o7_g5);
+ elfcpp::Swap<32, true>::writeval(pov + 0x04,
+ sparc_call_plus_8);
+ elfcpp::Swap<32, true>::writeval(pov + 0x08,
+ sparc_nop);
+ elfcpp::Swap<32, true>::writeval(pov + 0x0c,
+ sparc_ldx_o7_imm_g1 +
+ (data_off & 0x1fff));
+ elfcpp::Swap<32, true>::writeval(pov + 0x10,
+ sparc_jmpl_o7_g1_g1);
+ elfcpp::Swap<32, true>::writeval(pov + 0x14,
+ sparc_mov_g5_o7);
+
+ elfcpp::Swap<64, big_endian>::writeval(
+ pov + 0x4 + data_off,
+ (elfcpp::Elf_Xword) (oview - (pov + 0x04)));
+
+ pov += plt_insn_chunk_size;
+ data_off -= 16;
+ }
+ }
+
+ unsigned int sub_blk_cnt = ext_cnt % plt_entries_per_block;
+ for (unsigned int i = 0; i < sub_blk_cnt; ++i)
+ {
+ unsigned int data_off = (sub_blk_cnt
+ * plt_insn_chunk_size) - 4;
+
+ for (unsigned int j = 0; j < plt_entries_per_block; ++j)
+ {
+ elfcpp::Swap<32, true>::writeval(pov + 0x00,
+ sparc_mov_o7_g5);
+ elfcpp::Swap<32, true>::writeval(pov + 0x04,
+ sparc_call_plus_8);
+ elfcpp::Swap<32, true>::writeval(pov + 0x08,
+ sparc_nop);
+ elfcpp::Swap<32, true>::writeval(pov + 0x0c,
+ sparc_ldx_o7_imm_g1 +
+ (data_off & 0x1fff));
+ elfcpp::Swap<32, true>::writeval(pov + 0x10,
+ sparc_jmpl_o7_g1_g1);
+ elfcpp::Swap<32, true>::writeval(pov + 0x14,
+ sparc_mov_g5_o7);
+
+ elfcpp::Swap<64, big_endian>::writeval(
+ pov + 0x4 + data_off,
+ (elfcpp::Elf_Xword) (oview - (pov + 0x04)));
+
+ pov += plt_insn_chunk_size;
+ data_off -= 16;
+ }
+ }
+ }
+ }
+ else
+ {
+ for (unsigned int i = 0; i < count; ++i)
+ {
+ elfcpp::Swap<32, true>::writeval(pov + 0x00,
+ sparc_sethi_g1 + plt_offset);
+ elfcpp::Swap<32, true>::writeval(pov + 0x04,
+ sparc_branch_always +
+ (((- (plt_offset + 4)) >> 2) &
+ 0x003fffff));
+ elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop);
+
+ pov += base_plt_entry_size;
+ plt_offset += base_plt_entry_size;
+ }
+
+ elfcpp::Swap<32, true>::writeval(pov, sparc_nop);
+ pov += 4;
+ }
+
+ gold_assert(static_cast<section_size_type>(pov - oview) == oview_size);
+
+ of->write_output_view(offset, oview_size, oview);
+}
+
+// Create a PLT entry for a global symbol.
+
+template<int size, bool big_endian>
+void
+Target_sparc<size, big_endian>::make_plt_entry(Symbol_table* symtab,
+ Layout* layout,
+ Symbol* gsym)
+{
+ if (gsym->has_plt_offset())
+ return;
+
+ if (this->plt_ == NULL)
+ {
+ // Create the GOT sections first.
+ this->got_section(symtab, layout);
+
+ this->plt_ = new Output_data_plt_sparc<size, big_endian>(layout);
+ layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS,
+ (elfcpp::SHF_ALLOC
+ | elfcpp::SHF_EXECINSTR
+ | elfcpp::SHF_WRITE),
+ this->plt_);
+
+ // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section.
+ symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL,
+ this->plt_,
+ 0, 0, elfcpp::STT_OBJECT,
+ elfcpp::STB_LOCAL,
+ elfcpp::STV_HIDDEN, 0,
+ false, false);
+ }
+
+ this->plt_->add_entry(gsym);
+}
+
+// Create a GOT entry for the TLS module index.
+
+template<int size, bool big_endian>
+unsigned int
+Target_sparc<size, big_endian>::got_mod_index_entry(Symbol_table* symtab,
+ Layout* layout,
+ Sized_relobj<size, big_endian>* object)
+{
+ if (this->got_mod_index_offset_ == -1U)
+ {
+ gold_assert(symtab != NULL && layout != NULL && object != NULL);
+ Reloc_section* rela_dyn = this->rela_dyn_section(layout);
+ Output_data_got<size, big_endian>* got;
+ unsigned int got_offset;
+
+ got = this->got_section(symtab, layout);
+ got_offset = got->add_constant(0);
+ rela_dyn->add_local(object, 0,
+ (size == 64 ?
+ elfcpp::R_SPARC_TLS_DTPMOD64 :
+ elfcpp::R_SPARC_TLS_DTPMOD32), got,
+ got_offset, 0);
+ got->add_constant(0);
+ this->got_mod_index_offset_ = got_offset;
+ }
+ return this->got_mod_index_offset_;
+}
+
+// Handle a relocation against a non-function symbol defined in a
+// dynamic object. The traditional way to handle this is to generate
+// a COPY relocation to copy the variable at runtime from the shared
+// object into the executable's data segment. However, this is
+// undesirable in general, as if the size of the object changes in the
+// dynamic object, the executable will no longer work correctly. If
+// this relocation is in a writable section, then we can create a
+// dynamic reloc and the dynamic linker will resolve it to the correct
+// address at runtime. However, we do not want do that if the
+// relocation is in a read-only section, as it would prevent the
+// readonly segment from being shared. And if we have to eventually
+// generate a COPY reloc, then any dynamic relocations will be
+// useless. So this means that if this is a writable section, we need
+// to save the relocation until we see whether we have to create a
+// COPY relocation for this symbol for any other relocation.
+
+template<int size, bool big_endian>
+void
+Target_sparc<size, big_endian>::copy_reloc(const General_options* options,
+ Symbol_table* symtab,
+ Layout* layout,
+ Sized_relobj<size, big_endian>* object,
+ unsigned int data_shndx,
+ Output_section* output_section,
+ Symbol* gsym,
+ const elfcpp::Rela<size, big_endian>& rel)
+{
+ Sized_symbol<size>* ssym = symtab->get_sized_symbol<size>(gsym);
+
+ if (!Copy_relocs<size, big_endian>::need_copy_reloc(options, object,
+ data_shndx, ssym))
+ {
+ // So far we do not need a COPY reloc. Save this relocation.
+ // If it turns out that we never need a COPY reloc for this
+ // symbol, then we will emit the relocation.
+ if (this->copy_relocs_ == NULL)
+ this->copy_relocs_ = new Copy_relocs<size, big_endian>();
+ this->copy_relocs_->save(ssym, object, data_shndx, output_section, rel);
+ }
+ else
+ {
+ // Allocate space for this symbol in the .bss section.
+
+ typename elfcpp::Elf_types<size>::Elf_WXword symsize = ssym->symsize();
+
+ // There is no defined way to determine the required alignment
+ // of the symbol. We pick the alignment based on the size. We
+ // set an arbitrary maximum of 256.
+ //
+ // XXX The minimal alignment here is a workaround for a .bss
+ // XXX alignment issue, once fixed replace with 'align = 1'
+ unsigned int align;
+ for (align = (size == 64 ? 8 : 4); align < 512; align <<= 1)
+ if ((symsize & align) != 0)
+ break;
+
+ if (this->dynbss_ == NULL)
+ {
+ this->dynbss_ = new Output_data_space(align);
+ layout->add_output_section_data(".bss",
+ elfcpp::SHT_NOBITS,
+ (elfcpp::SHF_ALLOC
+ | elfcpp::SHF_WRITE),
+ this->dynbss_);
+ }
+
+ Output_data_space* dynbss = this->dynbss_;
+
+ if (align > dynbss->addralign())
+ dynbss->set_space_alignment(align);
+
+ section_size_type dynbss_size =
+ convert_to_section_size_type(dynbss->current_data_size());
+ dynbss_size = align_address(dynbss_size, align);
+ section_size_type offset = dynbss_size;
+ dynbss->set_current_data_size(dynbss_size + symsize);
+
+ symtab->define_with_copy_reloc(ssym, dynbss, offset);
+
+ // Add the COPY reloc.
+ Reloc_section* rela_dyn = this->rela_dyn_section(layout);
+ rela_dyn->add_global(ssym, elfcpp::R_SPARC_COPY, dynbss, offset, 0);
+ }
+}
+
+// Optimize the TLS relocation type based on what we know about the
+// symbol. IS_FINAL is true if the final address of this symbol is
+// known at link time.
+
+static tls::Tls_optimization
+optimize_tls_reloc(bool is_final, int r_type)
+{
+ // If we are generating a shared library, then we can't do anything
+ // in the linker.
+ if (parameters->options().shared())
+ return tls::TLSOPT_NONE;
+
+ switch (r_type)
+ {
+ case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
+ case elfcpp::R_SPARC_TLS_GD_LO10:
+ case elfcpp::R_SPARC_TLS_GD_ADD:
+ case elfcpp::R_SPARC_TLS_GD_CALL:
+ // These are General-Dynamic which permits fully general TLS
+ // access. Since we know that we are generating an executable,
+ // we can convert this to Initial-Exec. If we also know that
+ // this is a local symbol, we can further switch to Local-Exec.
+ if (is_final)
+ return tls::TLSOPT_TO_LE;
+ return tls::TLSOPT_TO_IE;
+
+ case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic
+ case elfcpp::R_SPARC_TLS_LDM_LO10:
+ case elfcpp::R_SPARC_TLS_LDM_ADD:
+ case elfcpp::R_SPARC_TLS_LDM_CALL:
+ // This is Local-Dynamic, which refers to a local symbol in the
+ // dynamic TLS block. Since we know that we generating an
+ // executable, we can switch to Local-Exec.
+ return tls::TLSOPT_TO_LE;
+
+ case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
+ case elfcpp::R_SPARC_TLS_LDO_LOX10:
+ case elfcpp::R_SPARC_TLS_LDO_ADD:
+ // Another type of Local-Dynamic relocation.
+ return tls::TLSOPT_TO_LE;
+
+ case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
+ case elfcpp::R_SPARC_TLS_IE_LO10:
+ case elfcpp::R_SPARC_TLS_IE_LD:
+ case elfcpp::R_SPARC_TLS_IE_LDX:
+ // These are Initial-Exec relocs which get the thread offset
+ // from the GOT. If we know that we are linking against the
+ // local symbol, we can switch to Local-Exec, which links the
+ // thread offset into the instruction.
+ if (is_final)
+ return tls::TLSOPT_TO_LE;
+ return tls::TLSOPT_NONE;
+
+ case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec
+ case elfcpp::R_SPARC_TLS_LE_LOX10:
+ // When we already have Local-Exec, there is nothing further we
+ // can do.
+ return tls::TLSOPT_NONE;
+
+ default:
+ gold_unreachable();
+ }
+}
+
+// Generate a PLT entry slot for a call to __tls_get_addr
+template<int size, bool big_endian>
+void
+Target_sparc<size, big_endian>::Scan::generate_tls_call(Symbol_table* symtab,
+ Layout* layout,
+ Target_sparc<size, big_endian>* target)
+{
+ Symbol* gsym = target->tls_get_addr_sym(symtab);
+
+ target->make_plt_entry(symtab, layout, gsym);
+}
+
+// Report an unsupported relocation against a local symbol.
+
+template<int size, bool big_endian>
+void
+Target_sparc<size, big_endian>::Scan::unsupported_reloc_local(
+ Sized_relobj<size, big_endian>* object,
+ unsigned int r_type)
+{
+ gold_error(_("%s: unsupported reloc %u against local symbol"),
+ object->name().c_str(), r_type);
+}
+
+// Scan a relocation for a local symbol.
+
+template<int size, bool big_endian>
+inline void
+Target_sparc<size, big_endian>::Scan::local(
+ const General_options&,
+ Symbol_table* symtab,
+ Layout* layout,
+ Target_sparc<size, big_endian>* target,
+ Sized_relobj<size, big_endian>* object,
+ 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)
+{
+ unsigned int orig_r_type = r_type;
+
+ r_type &= 0xff;
+ switch (r_type)
+ {
+ case elfcpp::R_SPARC_NONE:
+ case elfcpp::R_SPARC_REGISTER:
+ case elfcpp::R_SPARC_GNU_VTINHERIT:
+ case elfcpp::R_SPARC_GNU_VTENTRY:
+ break;
+
+ case elfcpp::R_SPARC_64:
+ case elfcpp::R_SPARC_32:
+ // If building a shared library (or a position-independent
+ // executable), we need to create a dynamic relocation for
+ // this location. The relocation applied at link time will
+ // 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,
+ output_section, data_shndx,
+ reloc.get_r_offset(),
+ reloc.get_r_addend());
+ }
+ break;
+
+ case elfcpp::R_SPARC_H44:
+ case elfcpp::R_SPARC_M44:
+ case elfcpp::R_SPARC_L44:
+ case elfcpp::R_SPARC_HH22:
+ case elfcpp::R_SPARC_HM10:
+ case elfcpp::R_SPARC_LM22:
+ case elfcpp::R_SPARC_UA64:
+ case elfcpp::R_SPARC_UA32:
+ case elfcpp::R_SPARC_UA16:
+ case elfcpp::R_SPARC_HI22:
+ case elfcpp::R_SPARC_LO10:
+ case elfcpp::R_SPARC_OLO10:
+ case elfcpp::R_SPARC_16:
+ case elfcpp::R_SPARC_8:
+ case elfcpp::R_SPARC_7:
+ case elfcpp::R_SPARC_6:
+ case elfcpp::R_SPARC_5:
+ // If building a shared library (or a position-independent
+ // 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);
+ if (lsym.get_st_type() != elfcpp::STT_SECTION)
+ {
+ unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
+ rela_dyn->add_local(object, r_sym, orig_r_type, output_section,
+ data_shndx, reloc.get_r_offset(),
+ reloc.get_r_addend());
+ }
+ else
+ {
+ unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
+ gold_assert(lsym.get_st_value() == 0);
+ rela_dyn->add_local_relative(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_WDISP22:
+ case elfcpp::R_SPARC_DISP8:
+ case elfcpp::R_SPARC_DISP16:
+ case elfcpp::R_SPARC_DISP32:
+ case elfcpp::R_SPARC_PC10:
+ case elfcpp::R_SPARC_PC22:
+ break;
+
+ 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;
+ unsigned int r_sym;
+
+ got = target->got_section(symtab, layout);
+ r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
+
+ // If we are generating a shared object, we need to add a
+ // dynamic relocation for this symbol's GOT entry.
+ if (parameters->options().output_is_position_independent())
+ {
+ if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD))
+ {
+ Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+ unsigned int off;
+
+ off = got->add_constant(0);
+ object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off);
+ rela_dyn->add_local_relative(object, r_sym,
+ elfcpp::R_SPARC_RELATIVE,
+ got, off, 0);
+ }
+ }
+ else
+ got->add_local(object, r_sym, GOT_TYPE_STANDARD);
+ }
+ break;
+
+ // These are initial TLS relocs, which are expected when
+ // linking.
+ case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
+ case elfcpp::R_SPARC_TLS_GD_LO10:
+ case elfcpp::R_SPARC_TLS_GD_ADD:
+ case elfcpp::R_SPARC_TLS_GD_CALL:
+ case elfcpp::R_SPARC_TLS_LDM_HI22 : // Local-dynamic
+ case elfcpp::R_SPARC_TLS_LDM_LO10:
+ case elfcpp::R_SPARC_TLS_LDM_ADD:
+ case elfcpp::R_SPARC_TLS_LDM_CALL:
+ case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
+ case elfcpp::R_SPARC_TLS_LDO_LOX10:
+ case elfcpp::R_SPARC_TLS_LDO_ADD:
+ case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
+ case elfcpp::R_SPARC_TLS_IE_LO10:
+ case elfcpp::R_SPARC_TLS_IE_LD:
+ case elfcpp::R_SPARC_TLS_IE_LDX:
+ case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec
+ case elfcpp::R_SPARC_TLS_LE_LOX10:
+ {
+ bool output_is_shared = parameters->options().shared();
+ const tls::Tls_optimization optimized_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_LO10:
+ case elfcpp::R_SPARC_TLS_GD_ADD:
+ 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());
+ got->add_local_pair_with_rela(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);
+ if (r_type == elfcpp::R_SPARC_TLS_GD_CALL)
+ generate_tls_call(symtab, layout, target);
+ }
+ else if (optimized_type != tls::TLSOPT_TO_LE)
+ unsupported_reloc_local(object, r_type);
+ break;
+
+ case elfcpp::R_SPARC_TLS_LDM_HI22 : // Local-dynamic
+ case elfcpp::R_SPARC_TLS_LDM_LO10:
+ case elfcpp::R_SPARC_TLS_LDM_ADD:
+ case elfcpp::R_SPARC_TLS_LDM_CALL:
+ if (optimized_type == tls::TLSOPT_NONE)
+ {
+ // Create a GOT entry for the module index.
+ target->got_mod_index_entry(symtab, layout, object);
+
+ if (r_type == elfcpp::R_SPARC_TLS_LDM_CALL)
+ generate_tls_call(symtab, layout, target);
+ }
+ else if (optimized_type != tls::TLSOPT_TO_LE)
+ unsupported_reloc_local(object, r_type);
+ break;
+
+ case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
+ case elfcpp::R_SPARC_TLS_LDO_LOX10:
+ case elfcpp::R_SPARC_TLS_LDO_ADD:
+ break;
+
+ case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
+ case elfcpp::R_SPARC_TLS_IE_LO10:
+ case elfcpp::R_SPARC_TLS_IE_LD:
+ case elfcpp::R_SPARC_TLS_IE_LDX:
+ layout->set_has_static_tls();
+ if (optimized_type == tls::TLSOPT_NONE)
+ {
+ // Create a GOT entry for the tp-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());
+
+ if (!object->local_has_got_offset(r_sym, GOT_TYPE_TLS_OFFSET))
+ {
+ Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+ unsigned int off = got->add_constant(0);
+
+ object->set_local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET,
+ off);
+ rela_dyn->add_local_relative(object, r_sym,
+ (size == 64 ?
+ elfcpp::R_SPARC_TLS_TPOFF64 :
+ elfcpp::R_SPARC_TLS_TPOFF32),
+ got, off, 0);
+ }
+ }
+ else if (optimized_type != tls::TLSOPT_TO_LE)
+ unsupported_reloc_local(object, r_type);
+ break;
+
+ case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec
+ case elfcpp::R_SPARC_TLS_LE_LOX10:
+ 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_local_relative(object, r_sym, r_type,
+ output_section, data_shndx,
+ reloc.get_r_offset(), 0);
+ }
+ break;
+ }
+ }
+ break;
+
+ // These are relocations which should only be seen by the
+ // dynamic linker, and should never be seen here.
+ case elfcpp::R_SPARC_COPY:
+ case elfcpp::R_SPARC_GLOB_DAT:
+ case elfcpp::R_SPARC_JMP_SLOT:
+ case elfcpp::R_SPARC_RELATIVE:
+ case elfcpp::R_SPARC_TLS_DTPMOD64:
+ case elfcpp::R_SPARC_TLS_DTPMOD32:
+ case elfcpp::R_SPARC_TLS_DTPOFF64:
+ case elfcpp::R_SPARC_TLS_DTPOFF32:
+ case elfcpp::R_SPARC_TLS_TPOFF64:
+ case elfcpp::R_SPARC_TLS_TPOFF32:
+ gold_error(_("%s: unexpected reloc %u in object file"),
+ object->name().c_str(), r_type);
+ break;
+
+ default:
+ unsupported_reloc_local(object, r_type);
+ break;
+ }
+}
+
+// Report an unsupported relocation against a global symbol.
+
+template<int size, bool big_endian>
+void
+Target_sparc<size, big_endian>::Scan::unsupported_reloc_global(
+ Sized_relobj<size, big_endian>* object,
+ unsigned int r_type,
+ Symbol* gsym)
+{
+ gold_error(_("%s: unsupported reloc %u against global symbol %s"),
+ object->name().c_str(), r_type, gsym->demangled_name().c_str());
+}
+
+// Scan a relocation for a global symbol.
+
+template<int size, bool big_endian>
+inline void
+Target_sparc<size, big_endian>::Scan::global(
+ const General_options& options,
+ Symbol_table* symtab,
+ Layout* layout,
+ Target_sparc<size, big_endian>* target,
+ Sized_relobj<size, big_endian>* object,
+ unsigned int data_shndx,
+ Output_section* output_section,
+ const elfcpp::Rela<size, big_endian>& reloc,
+ unsigned int r_type,
+ Symbol* gsym)
+{
+ unsigned int orig_r_type = r_type;
+
+ r_type &= 0xff;
+ switch (r_type)
+ {
+ case elfcpp::R_SPARC_NONE:
+ case elfcpp::R_SPARC_REGISTER:
+ case elfcpp::R_SPARC_GNU_VTINHERIT:
+ case elfcpp::R_SPARC_GNU_VTENTRY:
+ break;
+
+ case elfcpp::R_SPARC_WPLT30:
+ // If the symbol is fully resolved, this is just a PC32 reloc.
+ // Otherwise we need a PLT entry.
+ if (gsym->final_value_is_known())
+ break;
+ // If building a shared library, we can also skip the PLT entry
+ // 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())
+ break;
+ target->make_plt_entry(symtab, layout, gsym);
+ break;
+
+ case elfcpp::R_SPARC_DISP8:
+ case elfcpp::R_SPARC_DISP16:
+ case elfcpp::R_SPARC_DISP32:
+ case elfcpp::R_SPARC_PC10:
+ case elfcpp::R_SPARC_PC22:
+ case elfcpp::R_SPARC_WDISP30:
+ case elfcpp::R_SPARC_WDISP22:
+ {
+ if (gsym->needs_plt_entry())
+ target->make_plt_entry(symtab, layout, gsym);
+ // Make a dynamic relocation if necessary.
+ int flags = Symbol::NON_PIC_REF;
+ if (gsym->type() == elfcpp::STT_FUNC)
+ flags |= Symbol::FUNCTION_CALL;
+ if (gsym->needs_dynamic_reloc(flags))
+ {
+ if (target->may_need_copy_reloc(gsym))
+ {
+ target->copy_reloc(&options, symtab, layout, object,
+ data_shndx, output_section, gsym,
+ reloc);
+ }
+ else
+ {
+ Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+ rela_dyn->add_global(gsym, orig_r_type, output_section, object,
+ data_shndx, reloc.get_r_offset(),
+ reloc.get_r_addend());
+ }
+ }
+ }
+ break;
+
+ case elfcpp::R_SPARC_UA64:
+ case elfcpp::R_SPARC_64:
+ case elfcpp::R_SPARC_H44:
+ case elfcpp::R_SPARC_M44:
+ case elfcpp::R_SPARC_L44:
+ case elfcpp::R_SPARC_HH22:
+ case elfcpp::R_SPARC_HM10:
+ case elfcpp::R_SPARC_LM22:
+ case elfcpp::R_SPARC_HI22:
+ case elfcpp::R_SPARC_LO10:
+ case elfcpp::R_SPARC_OLO10:
+ case elfcpp::R_SPARC_UA32:
+ case elfcpp::R_SPARC_32:
+ case elfcpp::R_SPARC_UA16:
+ case elfcpp::R_SPARC_16:
+ case elfcpp::R_SPARC_8:
+ case elfcpp::R_SPARC_7:
+ 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(Symbol::ABSOLUTE_REF))
+ {
+ if (target->may_need_copy_reloc(gsym))
+ {
+ target->copy_reloc(&options, symtab, layout, object,
+ data_shndx, output_section, gsym, reloc);
+ }
+ 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,
+ output_section, object,
+ data_shndx, reloc.get_r_offset(),
+ reloc.get_r_addend());
+ }
+ else
+ {
+ Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+
+ if (gsym->is_from_dynobj()
+ || gsym->is_undefined()
+ || gsym->is_preemptible())
+ rela_dyn->add_global(gsym, orig_r_type, output_section,
+ object, data_shndx,
+ reloc.get_r_offset(),
+ reloc.get_r_addend());
+ else
+ rela_dyn->add_global_relative(gsym, orig_r_type,
+ output_section, object,
+ data_shndx,
+ reloc.get_r_offset(),
+ reloc.get_r_addend());
+ }
+ }
+ }
+ break;
+
+ 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;
+
+ got = target->got_section(symtab, layout);
+ if (gsym->final_value_is_known())
+ got->add_global(gsym, GOT_TYPE_STANDARD);
+ else
+ {
+ // If this symbol is not fully resolved, we need to add a
+ // dynamic relocation for it.
+ Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+ if (gsym->is_from_dynobj()
+ || gsym->is_undefined()
+ || gsym->is_preemptible())
+ got->add_global_with_rela(gsym, GOT_TYPE_STANDARD, rela_dyn,
+ elfcpp::R_SPARC_GLOB_DAT);
+ 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);
+ }
+ }
+ }
+ break;
+
+ // These are initial tls relocs, which are expected when
+ // linking.
+ case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
+ case elfcpp::R_SPARC_TLS_GD_LO10:
+ case elfcpp::R_SPARC_TLS_GD_ADD:
+ case elfcpp::R_SPARC_TLS_GD_CALL:
+ case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic
+ case elfcpp::R_SPARC_TLS_LDM_LO10:
+ case elfcpp::R_SPARC_TLS_LDM_ADD:
+ case elfcpp::R_SPARC_TLS_LDM_CALL:
+ case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
+ case elfcpp::R_SPARC_TLS_LDO_LOX10:
+ case elfcpp::R_SPARC_TLS_LDO_ADD:
+ case elfcpp::R_SPARC_TLS_LE_HIX22:
+ case elfcpp::R_SPARC_TLS_LE_LOX10:
+ case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
+ case elfcpp::R_SPARC_TLS_IE_LO10:
+ case elfcpp::R_SPARC_TLS_IE_LD:
+ case elfcpp::R_SPARC_TLS_IE_LDX:
+ {
+ const bool is_final = gsym->final_value_is_known();
+ const tls::Tls_optimization optimized_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_LO10:
+ case elfcpp::R_SPARC_TLS_GD_ADD:
+ 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_rela(gsym, GOT_TYPE_TLS_PAIR,
+ target->rela_dyn_section(layout),
+ (size == 64 ?
+ elfcpp::R_SPARC_TLS_DTPMOD64 :
+ elfcpp::R_SPARC_TLS_DTPMOD32),
+ (size == 64 ?
+ elfcpp::R_SPARC_TLS_DTPOFF64 :
+ elfcpp::R_SPARC_TLS_DTPOFF32));
+
+ // Emit R_SPARC_WPLT30 against "__tls_get_addr"
+ if (r_type == elfcpp::R_SPARC_TLS_GD_CALL)
+ generate_tls_call(symtab, layout, target);
+ }
+ 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_rela(gsym, GOT_TYPE_TLS_OFFSET,
+ target->rela_dyn_section(layout),
+ (size == 64 ?
+ elfcpp::R_SPARC_TLS_TPOFF64 :
+ elfcpp::R_SPARC_TLS_TPOFF32));
+ }
+ else if (optimized_type != tls::TLSOPT_TO_LE)
+ unsupported_reloc_global(object, r_type, gsym);
+ break;
+
+ case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic
+ case elfcpp::R_SPARC_TLS_LDM_LO10:
+ case elfcpp::R_SPARC_TLS_LDM_ADD:
+ case elfcpp::R_SPARC_TLS_LDM_CALL:
+ if (optimized_type == tls::TLSOPT_NONE)
+ {
+ // Create a GOT entry for the module index.
+ target->got_mod_index_entry(symtab, layout, object);
+
+ if (r_type == elfcpp::R_SPARC_TLS_LDM_CALL)
+ generate_tls_call(symtab, layout, target);
+ }
+ else if (optimized_type != tls::TLSOPT_TO_LE)
+ unsupported_reloc_global(object, r_type, gsym);
+ break;
+
+ case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
+ case elfcpp::R_SPARC_TLS_LDO_LOX10:
+ case elfcpp::R_SPARC_TLS_LDO_ADD:
+ break;
+
+ case elfcpp::R_SPARC_TLS_LE_HIX22:
+ case elfcpp::R_SPARC_TLS_LE_LOX10:
+ layout->set_has_static_tls();
+ if (parameters->options().shared())
+ {
+ Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+ rela_dyn->add_global_relative(gsym, orig_r_type,
+ output_section, object,
+ data_shndx, reloc.get_r_offset(),
+ 0);
+ }
+ break;
+
+ case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
+ case elfcpp::R_SPARC_TLS_IE_LO10:
+ case elfcpp::R_SPARC_TLS_IE_LD:
+ case elfcpp::R_SPARC_TLS_IE_LDX:
+ layout->set_has_static_tls();
+ if (optimized_type == tls::TLSOPT_NONE)
+ {
+ // 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_rela(gsym, GOT_TYPE_TLS_OFFSET,
+ target->rela_dyn_section(layout),
+ (size == 64 ?
+ elfcpp::R_SPARC_TLS_TPOFF64 :
+ elfcpp::R_SPARC_TLS_TPOFF32));
+ }
+ else if (optimized_type != tls::TLSOPT_TO_LE)
+ unsupported_reloc_global(object, r_type, gsym);
+ break;
+ }
+ }
+ break;
+
+ // These are relocations which should only be seen by the
+ // dynamic linker, and should never be seen here.
+ case elfcpp::R_SPARC_COPY:
+ case elfcpp::R_SPARC_GLOB_DAT:
+ case elfcpp::R_SPARC_JMP_SLOT:
+ case elfcpp::R_SPARC_RELATIVE:
+ case elfcpp::R_SPARC_TLS_DTPMOD64:
+ case elfcpp::R_SPARC_TLS_DTPMOD32:
+ case elfcpp::R_SPARC_TLS_DTPOFF64:
+ case elfcpp::R_SPARC_TLS_DTPOFF32:
+ case elfcpp::R_SPARC_TLS_TPOFF64:
+ case elfcpp::R_SPARC_TLS_TPOFF32:
+ gold_error(_("%s: unexpected reloc %u in object file"),
+ object->name().c_str(), r_type);
+ break;
+
+ default:
+ unsupported_reloc_global(object, r_type, gsym);
+ break;
+ }
+}
+
+// Scan relocations for a section.
+
+template<int size, bool big_endian>
+void
+Target_sparc<size, big_endian>::scan_relocs(
+ const General_options& options,
+ Symbol_table* symtab,
+ Layout* layout,
+ Sized_relobj<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)
+{
+ typedef Target_sparc<size, big_endian> Sparc;
+ typedef typename Target_sparc<size, big_endian>::Scan Scan;
+
+ if (sh_type == elfcpp::SHT_REL)
+ {
+ gold_error(_("%s: unsupported REL reloc section"),
+ object->name().c_str());
+ return;
+ }
+
+ gold::scan_relocs<size, big_endian, Sparc, elfcpp::SHT_RELA, Scan>(
+ options,
+ symtab,
+ layout,
+ this,
+ object,
+ data_shndx,
+ prelocs,
+ reloc_count,
+ output_section,
+ needs_special_offset_handling,
+ local_symbol_count,
+ plocal_symbols);
+}
+
+// Finalize the sections.
+
+template<int size, bool big_endian>
+void
+Target_sparc<size, big_endian>::do_finalize_sections(Layout* layout)
+{
+ // Fill in some more dynamic tags.
+ Output_data_dynamic* const odyn = layout->dynamic_data();
+ if (odyn != NULL)
+ {
+ if (this->plt_ != NULL)
+ {
+ const Output_data* od = this->plt_->rel_plt();
+ odyn->add_section_size(elfcpp::DT_PLTRELSZ, od);
+ odyn->add_section_address(elfcpp::DT_JMPREL, od);
+ odyn->add_constant(elfcpp::DT_PLTREL, elfcpp::DT_RELA);
+
+ odyn->add_section_address(elfcpp::DT_PLTGOT, this->plt_);
+ }
+
+ if (this->rela_dyn_ != NULL)
+ {
+ const Output_data* od = this->rela_dyn_;
+ odyn->add_section_address(elfcpp::DT_RELA, od);
+ odyn->add_section_size(elfcpp::DT_RELASZ, od);
+ odyn->add_constant(elfcpp::DT_RELAENT,
+ elfcpp::Elf_sizes<size>::rela_size);
+ }
+
+ if (!parameters->options().shared())
+ {
+ // The value of the DT_DEBUG tag is filled in by the dynamic
+ // linker at run time, and used by the debugger.
+ odyn->add_constant(elfcpp::DT_DEBUG, 0);
+ }
+ }
+
+ // Emit any relocs we saved in an attempt to avoid generating COPY
+ // relocs.
+ if (this->copy_relocs_ == NULL)
+ return;
+ if (this->copy_relocs_->any_to_emit())
+ {
+ Reloc_section* rela_dyn = this->rela_dyn_section(layout);
+ this->copy_relocs_->emit(rela_dyn);
+ }
+ delete this->copy_relocs_;
+ this->copy_relocs_ = NULL;
+}
+
+// Perform a relocation.
+
+template<int size, bool big_endian>
+inline bool
+Target_sparc<size, big_endian>::Relocate::relocate(
+ const Relocate_info<size, big_endian>* relinfo,
+ Target_sparc* target,
+ size_t relnum,
+ const elfcpp::Rela<size, big_endian>& rela,
+ unsigned int r_type,
+ 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)
+{
+ r_type &= 0xff;
+
+ if (this->ignore_gd_add_)
+ {
+ if (r_type != elfcpp::R_SPARC_TLS_GD_ADD)
+ gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
+ _("missing expected TLS relocation"));
+ else
+ {
+ this->ignore_gd_add_ = false;
+ return false;
+ }
+ }
+
+ typedef Sparc_relocate_functions<size, big_endian> Reloc;
+
+ // Pick the value to use for symbols defined in shared objects.
+ Symbol_value<size> symval;
+ if (gsym != NULL
+ && (gsym->is_from_dynobj()
+ || (parameters->options().shared()
+ && (gsym->is_undefined() || gsym->is_preemptible())))
+ && gsym->has_plt_offset())
+ {
+ elfcpp::Elf_Xword value;
+
+ value = target->plt_section()->address() + gsym->plt_offset();
+
+ symval.set_output_value(value);
+
+ psymval = &symval;
+ }
+
+ const Sized_relobj<size, big_endian>* object = relinfo->object;
+ const elfcpp::Elf_Xword addend = rela.get_r_addend();
+
+ // Get the GOT offset if needed. Unlike i386 and x86_64, our GOT
+ // pointer points to the beginning, not the end, of the table.
+ // So we just use the plain offset.
+ bool have_got_offset = false;
+ unsigned int got_offset = 0;
+ switch (r_type)
+ {
+ 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);
+ }
+ 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);
+ }
+ have_got_offset = true;
+ break;
+
+ default:
+ break;
+ }
+
+ switch (r_type)
+ {
+ case elfcpp::R_SPARC_NONE:
+ case elfcpp::R_SPARC_REGISTER:
+ case elfcpp::R_SPARC_GNU_VTINHERIT:
+ case elfcpp::R_SPARC_GNU_VTENTRY:
+ break;
+
+ case elfcpp::R_SPARC_8:
+ Relocate_functions<size, big_endian>::rela8(view, object,
+ psymval, addend);
+ break;
+
+ case elfcpp::R_SPARC_16:
+ Relocate_functions<size, big_endian>::rela16(view, object,
+ psymval, addend);
+ break;
+
+ case elfcpp::R_SPARC_32:
+ if (!parameters->options().output_is_position_independent())
+ Relocate_functions<size, big_endian>::rela32(view, object,
+ psymval, addend);
+ break;
+
+ case elfcpp::R_SPARC_DISP8:
+ Reloc::disp8(view, object, psymval, addend, address);
+ break;
+
+ case elfcpp::R_SPARC_DISP16:
+ Reloc::disp16(view, object, psymval, addend, address);
+ break;
+
+ case elfcpp::R_SPARC_DISP32:
+ Reloc::disp32(view, object, psymval, addend, address);
+ break;
+
+ case elfcpp::R_SPARC_WDISP30:
+ case elfcpp::R_SPARC_WPLT30:
+ Reloc::wdisp30(view, object, psymval, addend, address);
+ break;
+
+ case elfcpp::R_SPARC_WDISP22:
+ Reloc::wdisp22(view, object, psymval, addend, address);
+ break;
+
+ case elfcpp::R_SPARC_HI22:
+ Reloc::hi22(view, object, psymval, addend);
+ break;
+
+ case elfcpp::R_SPARC_22:
+ Reloc::rela22(view, object, psymval, addend);
+ break;
+
+ case elfcpp::R_SPARC_13:
+ Reloc::rela13(view, object, psymval, addend);
+ break;
+
+ case elfcpp::R_SPARC_LO10:
+ Reloc::lo10(view, object, psymval, addend);
+ break;
+
+ case elfcpp::R_SPARC_GOT10:
+ Reloc::lo10(view, got_offset, addend);
+ break;
+
+ case elfcpp::R_SPARC_GOT13:
+ Reloc::rela13(view, got_offset, addend);
+ break;
+
+ case elfcpp::R_SPARC_GOT22:
+ Reloc::hi22(view, got_offset, addend);
+ break;
+
+ case elfcpp::R_SPARC_PC10:
+ Reloc::pc10(view, object, psymval, addend, address);
+ break;
+
+ case elfcpp::R_SPARC_PC22:
+ Reloc::pc22(view, object, psymval, addend, address);
+ break;
+
+ case elfcpp::R_SPARC_TLS_DTPOFF32:
+ case elfcpp::R_SPARC_UA32:
+ Reloc::ua32(view, object, psymval, addend);
+ break;
+
+ case elfcpp::R_SPARC_64:
+ if (!parameters->options().output_is_position_independent())
+ Relocate_functions<size, big_endian>::rela64(view, object,
+ psymval, addend);
+ break;
+
+ case elfcpp::R_SPARC_OLO10:
+ {
+ unsigned int addend2 = rela.get_r_info() & 0xffffffff;
+ addend2 = ((addend2 >> 8) ^ 0x800000) - 0x800000;
+ Reloc::olo10(view, object, psymval, addend, addend2);
+ }
+ break;
+
+ case elfcpp::R_SPARC_HH22:
+ Reloc::hh22(view, object, psymval, addend);
+ break;
+
+ case elfcpp::R_SPARC_HM10:
+ Reloc::hm10(view, object, psymval, addend);
+ break;
+
+ case elfcpp::R_SPARC_LM22:
+ Reloc::hi22(view, object, psymval, addend);
+ break;
+
+ case elfcpp::R_SPARC_7:
+ Reloc::rela7(view, object, psymval, addend);
+ break;
+
+ case elfcpp::R_SPARC_5:
+ Reloc::rela5(view, object, psymval, addend);
+ break;
+
+ case elfcpp::R_SPARC_6:
+ Reloc::rela6(view, object, psymval, addend);
+ break;
+
+ case elfcpp::R_SPARC_H44:
+ Reloc::h44(view, object, psymval, addend);
+ break;
+
+ case elfcpp::R_SPARC_M44:
+ Reloc::m44(view, object, psymval, addend);
+ break;
+
+ case elfcpp::R_SPARC_L44:
+ Reloc::l44(view, object, psymval, addend);
+ break;
+
+ case elfcpp::R_SPARC_TLS_DTPOFF64:
+ case elfcpp::R_SPARC_UA64:
+ Reloc::ua64(view, object, psymval, addend);
+ break;
+
+ case elfcpp::R_SPARC_UA16:
+ Reloc::ua16(view, object, psymval, addend);
+ break;
+
+ case elfcpp::R_SPARC_TLS_GD_HI22:
+ case elfcpp::R_SPARC_TLS_GD_LO10:
+ case elfcpp::R_SPARC_TLS_GD_ADD:
+ case elfcpp::R_SPARC_TLS_GD_CALL:
+ case elfcpp::R_SPARC_TLS_LDM_HI22:
+ case elfcpp::R_SPARC_TLS_LDM_LO10:
+ case elfcpp::R_SPARC_TLS_LDM_ADD:
+ case elfcpp::R_SPARC_TLS_LDM_CALL:
+ case elfcpp::R_SPARC_TLS_LDO_HIX22:
+ case elfcpp::R_SPARC_TLS_LDO_LOX10:
+ case elfcpp::R_SPARC_TLS_LDO_ADD:
+ case elfcpp::R_SPARC_TLS_IE_HI22:
+ case elfcpp::R_SPARC_TLS_IE_LO10:
+ case elfcpp::R_SPARC_TLS_IE_LD:
+ case elfcpp::R_SPARC_TLS_IE_LDX:
+ case elfcpp::R_SPARC_TLS_LE_HIX22:
+ case elfcpp::R_SPARC_TLS_LE_LOX10:
+ this->relocate_tls(relinfo, target, relnum, rela,
+ r_type, gsym, psymval, view,
+ address, view_size);
+ break;
+
+ case elfcpp::R_SPARC_COPY:
+ case elfcpp::R_SPARC_GLOB_DAT:
+ case elfcpp::R_SPARC_JMP_SLOT:
+ case elfcpp::R_SPARC_RELATIVE:
+ // These are outstanding tls relocs, which are unexpected when
+ // linking.
+ case elfcpp::R_SPARC_TLS_DTPMOD64:
+ case elfcpp::R_SPARC_TLS_DTPMOD32:
+ case elfcpp::R_SPARC_TLS_TPOFF64:
+ case elfcpp::R_SPARC_TLS_TPOFF32:
+ gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
+ _("unexpected reloc %u in object file"),
+ r_type);
+ break;
+
+ default:
+ gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
+ _("unsupported reloc %u"),
+ r_type);
+ break;
+ }
+
+ return true;
+}
+
+// Perform a TLS relocation.
+
+template<int size, bool big_endian>
+inline void
+Target_sparc<size, big_endian>::Relocate::relocate_tls(
+ const Relocate_info<size, big_endian>* relinfo,
+ Target_sparc<size, big_endian>* target,
+ size_t relnum,
+ const elfcpp::Rela<size, big_endian>& rela,
+ unsigned int r_type,
+ const Sized_symbol<size>* gsym,
+ const Symbol_value<size>* psymval,
+ unsigned char* view,
+ typename elfcpp::Elf_types<size>::Elf_Addr address,
+ section_size_type)
+{
+ Output_segment* tls_segment = relinfo->layout->tls_segment();
+ typedef Sparc_relocate_functions<size, big_endian> Reloc;
+ const Sized_relobj<size, big_endian>* object = relinfo->object;
+ typedef typename elfcpp::Swap<32, true>::Valtype Insntype;
+
+ const elfcpp::Elf_Xword addend = rela.get_r_addend();
+ typename elfcpp::Elf_types<size>::Elf_Addr value = psymval->value(object, 0);
+
+ const bool is_final =
+ (gsym == NULL
+ ? !parameters->options().output_is_position_independent()
+ : gsym->final_value_is_known());
+ const tls::Tls_optimization optimized_type
+ = optimize_tls_reloc(is_final, r_type);
+
+ switch (r_type)
+ {
+ case elfcpp::R_SPARC_TLS_GD_HI22:
+ case elfcpp::R_SPARC_TLS_GD_LO10:
+ case elfcpp::R_SPARC_TLS_GD_ADD:
+ case elfcpp::R_SPARC_TLS_GD_CALL:
+ if (optimized_type == tls::TLSOPT_TO_LE)
+ {
+ Insntype* wv = reinterpret_cast<Insntype*>(view);
+ Insntype val;
+
+ value -= tls_segment->memsz();
+
+ switch (r_type)
+ {
+ case elfcpp::R_SPARC_TLS_GD_HI22:
+ // TLS_GD_HI22 --> TLS_LE_HIX22
+ Reloc::le_hix22(view, value, addend);
+ break;
+
+ case elfcpp::R_SPARC_TLS_GD_LO10:
+ // TLS_GD_LO10 --> TLS_LE_LOX10
+ Reloc::le_lox10(view, value, addend);
+ break;
+
+ case elfcpp::R_SPARC_TLS_GD_ADD:
+ // add %reg1, %reg2, %reg3 --> mov %g7, %reg2, %reg3
+ val = elfcpp::Swap<32, true>::readval(wv);
+ val = (val & ~0x7c000) | 0x1c000;
+ elfcpp::Swap<32, true>::writeval(wv, val);
+ break;
+ case elfcpp::R_SPARC_TLS_GD_CALL:
+ // call __tls_get_addr --> nop
+ elfcpp::Swap<32, true>::writeval(wv, sparc_nop);
+ break;
+ }
+ 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)
+ {
+ Insntype* wv = reinterpret_cast<Insntype*>(view);
+ Insntype val;
+
+ switch (r_type)
+ {
+ case elfcpp::R_SPARC_TLS_GD_HI22:
+ // TLS_GD_HI22 --> TLS_IE_HI22
+ Reloc::hi22(view, value, addend);
+ break;
+
+ case elfcpp::R_SPARC_TLS_GD_LO10:
+ // TLS_GD_LO10 --> TLS_IE_LO10
+ Reloc::lo10(view, value, addend);
+ break;
+
+ case elfcpp::R_SPARC_TLS_GD_ADD:
+ // add %reg1, %reg2, %reg3 --> ld [%reg1 + %reg2], %reg3
+ val = elfcpp::Swap<32, true>::readval(wv);
+
+ if (size == 64)
+ val |= 0xc0580000;
+ else
+ val |= 0xc0000000;
+
+ elfcpp::Swap<32, true>::writeval(wv, val);
+ break;
+
+ case elfcpp::R_SPARC_TLS_GD_CALL:
+ // The compiler can put the TLS_GD_ADD instruction
+ // into the delay slot of the call. If so, we need
+ // to transpose the two instructions so that the
+ // the new sequence works properly.
+ //
+ // The test we use is if the instruction in the
+ // delay slot is an add with destination register
+ // equal to %o0
+ val = elfcpp::Swap<32, true>::readval(wv + 1);
+ if ((val & 0x81f80000) == 0x80000000
+ && ((val >> 25) & 0x1f) == 0x8)
+ {
+ if (size == 64)
+ val |= 0xc0580000;
+ else
+ val |= 0xc0000000;
+
+ elfcpp::Swap<32, true>::writeval(wv, val);
+
+ wv += 1;
+ this->ignore_gd_add_ = true;
+ }
+
+ // call __tls_get_addr --> add %g7, %o0, %o0
+ elfcpp::Swap<32, true>::writeval(wv, 0x9001c008);
+ break;
+ }
+ break;
+ }
+ else if (optimized_type == tls::TLSOPT_NONE)
+ {
+ switch (r_type)
+ {
+ case elfcpp::R_SPARC_TLS_GD_HI22:
+ Reloc::hi22(view, value, addend);
+ break;
+ case elfcpp::R_SPARC_TLS_GD_LO10:
+ Reloc::lo10(view, value, addend);
+ break;
+ case elfcpp::R_SPARC_TLS_GD_ADD:
+ break;
+ case elfcpp::R_SPARC_TLS_GD_CALL:
+ {
+ Symbol_value<size> symval;
+ elfcpp::Elf_Xword value;
+ Symbol* tsym;
+
+ tsym = target->tls_get_addr_sym_;
+ gold_assert(tsym);
+ value = (target->plt_section()->address() +
+ tsym->plt_offset());
+ symval.set_output_value(value);
+ Reloc::wdisp30(view, object, &symval, addend, address);
+ }
+ break;
+ }
+ break;
+ }
+ }
+ gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
+ _("unsupported reloc %u"),
+ r_type);
+ break;
+
+ case elfcpp::R_SPARC_TLS_LDM_HI22:
+ case elfcpp::R_SPARC_TLS_LDM_LO10:
+ case elfcpp::R_SPARC_TLS_LDM_ADD:
+ case elfcpp::R_SPARC_TLS_LDM_CALL:
+ if (optimized_type == tls::TLSOPT_TO_LE)
+ {
+ Insntype* wv = reinterpret_cast<Insntype*>(view);
+
+ switch (r_type)
+ {
+ case elfcpp::R_SPARC_TLS_LDM_HI22:
+ case elfcpp::R_SPARC_TLS_LDM_LO10:
+ case elfcpp::R_SPARC_TLS_LDM_ADD:
+ elfcpp::Swap<32, true>::writeval(wv, sparc_nop);
+ break;
+
+ case elfcpp::R_SPARC_TLS_LDM_CALL:
+ elfcpp::Swap<32, true>::writeval(wv, sparc_mov_g0_o0);
+ break;
+ }
+ 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;
+
+ got_offset = target->got_mod_index_entry(NULL, NULL, NULL);
+ switch (r_type)
+ {
+ case elfcpp::R_SPARC_TLS_LDM_HI22:
+ Reloc::hi22(view, got_offset, addend);
+ break;
+ case elfcpp::R_SPARC_TLS_LDM_LO10:
+ Reloc::lo10(view, got_offset, addend);
+ break;
+ case elfcpp::R_SPARC_TLS_LDM_ADD:
+ break;
+ case elfcpp::R_SPARC_TLS_LDM_CALL:
+ {
+ Symbol_value<size> symval;
+ elfcpp::Elf_Xword value;
+ Symbol* tsym;
+
+ tsym = target->tls_get_addr_sym_;
+ gold_assert(tsym);
+ value = (target->plt_section()->address() +
+ tsym->plt_offset());
+ symval.set_output_value(value);
+ Reloc::wdisp30(view, object, &symval, addend, address);
+ }
+ break;
+ }
+ break;
+ }
+ gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
+ _("unsupported reloc %u"),
+ r_type);
+ break;
+
+ // These relocs can appear in debugging sections, in which case
+ // we won't see the TLS_LDM relocs. The local_dynamic_type
+ // field tells us this.
+ case elfcpp::R_SPARC_TLS_LDO_HIX22:
+ if (optimized_type == tls::TLSOPT_TO_LE)
+ {
+ value -= tls_segment->memsz();
+ Reloc::le_hix22(view, value, addend);
+ }
+ else
+ Reloc::ldo_hix22(view, value, addend);
+ break;
+ case elfcpp::R_SPARC_TLS_LDO_LOX10:
+ if (optimized_type == tls::TLSOPT_TO_LE)
+ {
+ value -= tls_segment->memsz();
+ Reloc::le_lox10(view, value, addend);
+ }
+ else
+ Reloc::ldo_lox10(view, value, addend);
+ break;
+ case elfcpp::R_SPARC_TLS_LDO_ADD:
+ if (optimized_type == tls::TLSOPT_TO_LE)
+ {
+ Insntype* wv = reinterpret_cast<Insntype*>(view);
+ Insntype val;
+
+ // add %reg1, %reg2, %reg3 --> add %g7, %reg2, %reg3
+ val = elfcpp::Swap<32, true>::readval(wv);
+ val = (val & ~0x7c000) | 0x1c000;
+ elfcpp::Swap<32, true>::writeval(wv, val);
+ }
+ break;
+
+ // When optimizing IE --> LE, the only relocation that is handled
+ // differently is R_SPARC_TLS_IE_LD, it is rewritten from
+ // 'ld{,x} [rs1 + rs2], rd' into 'mov rs2, rd' or simply a NOP is
+ // rs2 and rd are the same.
+ case elfcpp::R_SPARC_TLS_IE_LD:
+ case elfcpp::R_SPARC_TLS_IE_LDX:
+ if (optimized_type == tls::TLSOPT_TO_LE)
+ {
+ Insntype* wv = reinterpret_cast<Insntype*>(view);
+ Insntype val = elfcpp::Swap<32, true>::readval(wv);
+ Insntype rs2 = val & 0x1f;
+ Insntype rd = (val >> 25) & 0x1f;
+
+ if (rs2 == rd)
+ val = sparc_nop;
+ else
+ val = sparc_mov | (val & 0x3e00001f);
+
+ elfcpp::Swap<32, true>::writeval(wv, val);
+ }
+ break;
+
+ case elfcpp::R_SPARC_TLS_IE_HI22:
+ case elfcpp::R_SPARC_TLS_IE_LO10:
+ if (optimized_type == tls::TLSOPT_TO_LE)
+ {
+ value -= tls_segment->memsz();
+ switch (r_type)
+ {
+ case elfcpp::R_SPARC_TLS_IE_HI22:
+ // IE_HI22 --> LE_HIX22
+ Reloc::le_hix22(view, value, addend);
+ break;
+ case elfcpp::R_SPARC_TLS_IE_LO10:
+ // IE_LO10 --> LE_LOX10
+ Reloc::le_lox10(view, value, addend);
+ break;
+ }
+ break;
+ }
+ else if (optimized_type == tls::TLSOPT_NONE)
+ {
+ // Relocate the field with the offset of the GOT entry for
+ // the tp-relative offset of the symbol.
+ if (gsym != NULL)
+ {
+ gold_assert(gsym->has_got_offset(GOT_TYPE_TLS_OFFSET));
+ value = gsym->got_offset(GOT_TYPE_TLS_OFFSET);
+ }
+ 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_TLS_OFFSET));
+ value = object->local_got_offset(r_sym,
+ GOT_TYPE_TLS_OFFSET);
+ }
+ switch (r_type)
+ {
+ case elfcpp::R_SPARC_TLS_IE_HI22:
+ Reloc::hi22(view, value, addend);
+ break;
+ case elfcpp::R_SPARC_TLS_IE_LO10:
+ Reloc::lo10(view, value, addend);
+ break;
+ }
+ break;
+ }
+ gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
+ _("unsupported reloc %u"),
+ r_type);
+ break;
+
+ case elfcpp::R_SPARC_TLS_LE_HIX22:
+ // If we're creating a shared library, a dynamic relocation will
+ // have been created for this location, so do not apply it now.
+ if (!parameters->options().shared())
+ {
+ value -= tls_segment->memsz();
+ Reloc::le_hix22(view, value, addend);
+ }
+ break;
+
+ case elfcpp::R_SPARC_TLS_LE_LOX10:
+ // If we're creating a shared library, a dynamic relocation will
+ // have been created for this location, so do not apply it now.
+ if (!parameters->options().shared())
+ {
+ value -= tls_segment->memsz();
+ Reloc::le_lox10(view, value, addend);
+ }
+ break;
+ }
+}
+
+// Relocate section data.
+
+template<int size, bool big_endian>
+void
+Target_sparc<size, big_endian>::relocate_section(
+ const Relocate_info<size, big_endian>* relinfo,
+ unsigned int sh_type,
+ const unsigned char* prelocs,
+ size_t reloc_count,
+ Output_section* output_section,
+ bool needs_special_offset_handling,
+ unsigned char* view,
+ typename elfcpp::Elf_types<size>::Elf_Addr address,
+ section_size_type view_size)
+{
+ typedef Target_sparc<size, big_endian> Sparc;
+ typedef typename Target_sparc<size, big_endian>::Relocate Sparc_relocate;
+
+ gold_assert(sh_type == elfcpp::SHT_RELA);
+
+ gold::relocate_section<size, big_endian, Sparc, elfcpp::SHT_RELA,
+ Sparc_relocate>(
+ relinfo,
+ this,
+ prelocs,
+ reloc_count,
+ output_section,
+ needs_special_offset_handling,
+ view,
+ address,
+ view_size);
+}
+
+// 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>
+void
+Target_sparc<size, big_endian>::scan_relocatable_relocs(
+ const General_options& options,
+ Symbol_table* symtab,
+ Layout* layout,
+ Sized_relobj<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,
+ Relocatable_relocs* rr)
+{
+ gold_assert(sh_type == elfcpp::SHT_RELA);
+
+ typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_RELA,
+ Relocatable_size_for_reloc> Scan_relocatable_relocs;
+
+ gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA,
+ Scan_relocatable_relocs>(
+ options,
+ symtab,
+ layout,
+ object,
+ data_shndx,
+ prelocs,
+ reloc_count,
+ output_section,
+ needs_special_offset_handling,
+ local_symbol_count,
+ plocal_symbols,
+ rr);
+}
+
+// Relocate a section during a relocatable link.
+
+template<int size, bool big_endian>
+void
+Target_sparc<size, big_endian>::relocate_for_relocatable(
+ 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,
+ 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)
+{
+ gold_assert(sh_type == elfcpp::SHT_RELA);
+
+ gold::relocate_for_relocatable<size, big_endian, elfcpp::SHT_RELA>(
+ relinfo,
+ prelocs,
+ reloc_count,
+ output_section,
+ offset_in_output_section,
+ rr,
+ view,
+ view_address,
+ view_size,
+ reloc_view,
+ reloc_view_size);
+}
+
+// Return the value to use for a dynamic which requires special
+// treatment. This is how we support equality comparisons of function
+// pointers across shared library boundaries, as described in the
+// processor specific ABI supplement.
+
+template<int size, bool big_endian>
+uint64_t
+Target_sparc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const
+{
+ gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
+ return this->plt_section()->address() + gsym->plt_offset();
+}
+
+// The selector for sparc object files.
+
+template<int size, bool big_endian>
+class Target_selector_sparc : public Target_selector
+{
+public:
+ Target_selector_sparc()
+ : Target_selector(elfcpp::EM_NONE, size, big_endian,
+ (size == 64 ? "elf64-sparc" : "elf32-sparc"))
+ { }
+
+ Target* instantiated_target_;
+
+ Target* do_recognize(int machine, int, int)
+ {
+ switch (size)
+ {
+ case 64:
+ if (machine != elfcpp::EM_SPARCV9)
+ return NULL;
+ break;
+
+ case 32:
+ if (machine != elfcpp::EM_SPARC
+ && machine != elfcpp::EM_SPARC32PLUS)
+ return NULL;
+ break;
+
+ default:
+ return NULL;
+ }
+
+ return do_instantiate_target();
+ }
+
+ Target* do_instantiate_target()
+ {
+ if (this->instantiated_target_ == NULL)
+ this->instantiated_target_ = new Target_sparc<size, big_endian>();
+ return this->instantiated_target_;
+ }
+};
+
+Target_selector_sparc<32, true> target_selector_sparc32;
+Target_selector_sparc<64, true> target_selector_sparc64;
+
+} // End anonymous namespace.
Index: Makefile.am
===================================================================
RCS file: /cvs/src/src/gold/Makefile.am,v
retrieving revision 1.33
diff -u -p -r1.33 Makefile.am
--- Makefile.am 8 Feb 2008 07:06:57 -0000 1.33
+++ Makefile.am 11 Apr 2008 22:38:29 -0000
@@ -103,10 +103,10 @@ YFILES = \
EXTRA_DIST = yyscript.c yyscript.h
TARGETSOURCES = \
- i386.cc x86_64.cc
+ i386.cc x86_64.cc sparc.cc
ALL_TARGETOBJS = \
- i386.$(OBJEXT) x86_64.$(OBJEXT)
+ i386.$(OBJEXT) x86_64.$(OBJEXT) sparc.$(OBJEXT)
libgold_a_SOURCES = $(CCFILES) $(HFILES) $(YFILES)
Index: Makefile.in
===================================================================
RCS file: /cvs/src/src/gold/Makefile.in,v
retrieving revision 1.46
diff -u -p -r1.46 Makefile.in
--- Makefile.in 11 Apr 2008 21:24:29 -0000 1.46
+++ Makefile.in 11 Apr 2008 22:38:29 -0000
@@ -377,10 +377,10 @@ YFILES = \
EXTRA_DIST = yyscript.c yyscript.h
TARGETSOURCES = \
- i386.cc x86_64.cc
+ i386.cc x86_64.cc sparc.cc
ALL_TARGETOBJS = \
- i386.$(OBJEXT) x86_64.$(OBJEXT)
+ i386.$(OBJEXT) x86_64.$(OBJEXT) sparc.$(OBJEXT)
libgold_a_SOURCES = $(CCFILES) $(HFILES) $(YFILES)
sources_var = main.cc
@@ -533,6 +533,7 @@ distclean-compile:
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/resolve.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/script-sections.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/script.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/sparc.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/stringpool.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/symtab.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/target-select.Po@am__quote@
Index: configure.tgt
===================================================================
RCS file: /cvs/src/src/gold/configure.tgt,v
retrieving revision 1.1
diff -u -p -r1.1 configure.tgt
--- configure.tgt 6 Feb 2008 20:32:10 -0000 1.1
+++ configure.tgt 11 Apr 2008 22:38:29 -0000
@@ -49,6 +49,18 @@ x86_64*)
targ_size=64
targ_big_endian=false
;;
+sparc-*)
+ targ_obj=sparc
+ targ_machine=EM_SPARC
+ targ_size=32
+ targ_big_endian=true
+ ;;
+sparc64-*)
+ targ_obj=sparc
+ targ_machine=EM_SPARCV9
+ targ_size=64
+ targ_big_endian=true
+ ;;
*)
targ_obj=UNKNOWN
;;