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binutils-gdb
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Implement --just-symbols, including -R FILE. Fix symbol values when 

doing a relocatable link.
This commit is contained in:
Ian Lance Taylor 2008-02-07 01:51:25 +00:00
parent 2e444beaa0
commit 88dd47ac00
16 changed files with 344 additions and 24 deletions
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23
elfcpp/elfcpp_file.h
View File

@ -139,6 +139,10 @@ class Elf_file
typename Elf_types<size>::Elf_WXword
section_flags(unsigned int shndx);
// Return the address of section SHNDX.
typename Elf_types<size>::Elf_Addr
section_addr(unsigned int shndx);
// Return the type of section SHNDX.
Elf_Word
section_type(unsigned int shndx);
@ -341,6 +345,25 @@ Elf_file<size, big_endian, File>::section_flags(unsigned int shndx)
return shdr.get_sh_flags();
}
// Return the address of section SHNDX.
template<int size, bool big_endian, typename File>
typename Elf_types<size>::Elf_Addr
Elf_file<size, big_endian, File>::section_addr(unsigned int shndx)
{
File* const file = this->file_;
if (shndx >= this->shnum())
file->error(_("section_flags: bad shndx %u >= %u"),
shndx, this->shnum());
typename File::View v(file->view(this->section_header_offset(shndx),
This::shdr_size));
Ef_shdr shdr(v.data());
return shdr.get_sh_addr();
}
// Return the type of section SHNDX.
template<int size, bool big_endian, typename File>

5
gold/dynobj.h
View File

@ -197,6 +197,11 @@ class Sized_dynobj : public Dynobj
do_section_flags(unsigned int shndx)
{ return this->elf_file_.section_flags(shndx); }
// Return section address.
uint64_t
do_section_address(unsigned int shndx)
{ return this->elf_file_.section_addr(shndx); }
// Return section type.
unsigned int
do_section_type(unsigned int shndx)

15
gold/fileread.cc
View File

@ -576,7 +576,8 @@ Input_file::Input_file(const Task* task, const char* name,
: file_()
{
this->input_argument_ =
new Input_file_argument(name, false, "", Position_dependent_options());
new Input_file_argument(name, false, "", false,
Position_dependent_options());
bool ok = file_.open(task, name, contents, size);
gold_assert(ok);
}
@ -593,7 +594,17 @@ Input_file::options() const
const char*
Input_file::name() const
{ return this->input_argument_->name(); }
{
return this->input_argument_->name();
}
// Return whether we are only reading symbols.
bool
Input_file::just_symbols() const
{
return this->input_argument_->just_symbols();
}
// Open the file.

4
gold/fileread.h
View File

@ -418,6 +418,10 @@ class Input_file
is_in_sysroot() const
{ return this->is_in_sysroot_; }
// Return whether this file is to be read only for its symbols.
bool
just_symbols() const;
private:
Input_file(const Input_file&);
Input_file& operator=(const Input_file&);

6
gold/layout.cc
View File

@ -942,10 +942,10 @@ Layout::finalize(const Input_objects* input_objects, Symbol_table* symtab,
// If there is a SECTIONS clause, put all the input sections into
// the required order.
Output_segment* load_seg;
if (parameters->output_is_object())
load_seg = NULL;
else if (this->script_options_->saw_sections_clause())
if (this->script_options_->saw_sections_clause())
load_seg = this->set_section_addresses_from_script(symtab);
else if (parameters->output_is_object())
load_seg = NULL;
else
load_seg = this->find_first_load_seg();

11
gold/object.cc
View File

@ -574,6 +574,17 @@ Sized_relobj<size, big_endian>::do_layout(Symbol_table* symtab,
std::vector<Map_to_output>& map_sections(this->map_to_output());
map_sections.resize(shnum);
// If we are only linking for symbols, then there is nothing else to
// do here.
if (this->input_file()->just_symbols())
{
delete sd->section_headers;
sd->section_headers = NULL;
delete sd->section_names;
sd->section_names = NULL;
return;
}
// Whether we've seen a .note.GNU-stack section.
bool seen_gnu_stack = false;
// The flags of a .note.GNU-stack section.

19
gold/object.h
View File

@ -190,6 +190,11 @@ class Object
release()
{ this->input_file_->file().release(); }
// Return whether we should just read symbols from this file.
bool
just_symbols() const
{ return this->input_file()->just_symbols(); }
// Return the sized target structure associated with this object.
// This is like the target method but it returns a pointer of
// appropriate checked type.
@ -222,6 +227,11 @@ class Object
section_flags(unsigned int shndx)
{ return this->do_section_flags(shndx); }
// Return the section address given a section index.
uint64_t
section_address(unsigned int shndx)
{ return this->do_section_address(shndx); }
// Return the section type given a section index.
unsigned int
section_type(unsigned int shndx)
@ -366,6 +376,10 @@ class Object
virtual uint64_t
do_section_flags(unsigned int shndx) = 0;
// Get section address--implemented by child class.
virtual uint64_t
do_section_address(unsigned int shndx) = 0;
// Get section type--implemented by child class.
virtual unsigned int
do_section_type(unsigned int shndx) = 0;
@ -1211,6 +1225,11 @@ class Sized_relobj : public Relobj
do_section_flags(unsigned int shndx)
{ return this->elf_file_.section_flags(shndx); }
// Return section address.
uint64_t
do_section_address(unsigned int shndx)
{ return this->elf_file_.section_addr(shndx); }
// Return section type.
unsigned int
do_section_type(unsigned int shndx)

53
gold/options.cc
View File

@ -144,6 +144,42 @@ library(int argc, char** argv, char* arg, bool long_option,
return cmdline->process_l_option(argc, argv, arg, long_option);
}
// Handle the -R option. Historically the GNU linker made -R a
// synonym for --just-symbols. ELF linkers have traditionally made -R
// a synonym for -rpath. When ELF support was added to the GNU
// linker, -R was changed to switch based on the argument: if the
// argument is an ordinary file, we treat it as --just-symbols,
// otherwise we treat it as -rpath. We need to be compatible with
// this, because existing build scripts rely on it.
int
handle_r_option(int argc, char** argv, char* arg, bool long_option,
gold::Command_line* cmdline)
{
int ret;
const char* val = cmdline->get_special_argument("R", argc, argv, arg,
long_option, &ret);
struct stat s;
if (::stat(val, &s) != 0 || S_ISDIR(s.st_mode))
cmdline->add_to_rpath(val);
else
cmdline->add_just_symbols_file(val);
return ret;
}
// Handle the --just-symbols option.
int
handle_just_symbols_option(int argc, char** argv, char* arg,
bool long_option, gold::Command_line* cmdline)
{
int ret;
const char* val = cmdline->get_special_argument("just-symbols", argc, argv,
arg, long_option, &ret);
cmdline->add_just_symbols_file(val);
return ret;
}
// Handle the special -T/--script option, which reads a linker script.
int
@ -223,7 +259,7 @@ help(int, char**, char*, bool, gold::Command_line*)
len += 2;
}
printf(options[j].help_output);
len += std::strlen(options[i].help_output);
len += std::strlen(options[j].help_output);
comma = true;
}
else
@ -443,9 +479,16 @@ options::Command_line_options::options[] =
&General_options::set_optimization_level),
GENERAL_NOARG('r', NULL, N_("Generate relocatable output"), NULL,
ONE_DASH, &General_options::set_relocatable),
GENERAL_ARG('R', "rpath", N_("Add DIR to runtime search path"),
N_("-R DIR, -rpath DIR"), ONE_DASH,
&General_options::add_to_rpath),
// -R really means -rpath, but can mean --just-symbols for
// compatibility with GNU ld. -rpath is always -rpath, so we list
// it separately.
SPECIAL('R', NULL, N_("Add DIR to runtime search path"),
N_("-R DIR"), ONE_DASH, &handle_r_option),
GENERAL_ARG('\0', "rpath", NULL, N_("-rpath DIR"), ONE_DASH,
&General_options::add_to_rpath),
SPECIAL('\0', "just-symbols", N_("Read only symbol values from file"),
N_("-R FILE, --just-symbols FILE"), TWO_DASHES,
&handle_just_symbols_option),
GENERAL_ARG('\0', "rpath-link",
N_("Add DIR to link time shared library search path"),
N_("--rpath-link DIR"), TWO_DASHES,
@ -1023,7 +1066,7 @@ Command_line::apply_option(const options::One_option& opt,
void
Command_line::add_file(const char* name, bool is_lib)
{
Input_file_argument file(name, is_lib, "", this->position_options_);
Input_file_argument file(name, is_lib, "", false, this->position_options_);
this->inputs_.add_file(file);
}

26
gold/options.h
View File

@ -636,17 +636,20 @@ class Input_file_argument
// extra_search_path: an extra directory to look for the file, prior
// to checking the normal library search path. If this is "",
// then no extra directory is added.
// just_symbols: whether this file only defines symbols.
// options: The position dependent options at this point in the
// command line, such as --whole-archive.
Input_file_argument()
: name_(), is_lib_(false), extra_search_path_(""), options_()
: name_(), is_lib_(false), extra_search_path_(""), just_symbols_(false),
options_()
{ }
Input_file_argument(const char* name, bool is_lib,
const char* extra_search_path,
bool just_symbols,
const Position_dependent_options& options)
: name_(name), is_lib_(is_lib), extra_search_path_(extra_search_path),
options_(options)
just_symbols_(just_symbols), options_(options)
{ }
const char*
@ -669,6 +672,11 @@ class Input_file_argument
: this->extra_search_path_.c_str());
}
// Return whether we should only read symbols from this file.
bool
just_symbols() const
{ return this->just_symbols_; }
// Return whether this file may require a search using the -L
// options.
bool
@ -682,6 +690,7 @@ class Input_file_argument
std::string name_;
bool is_lib_;
std::string extra_search_path_;
bool just_symbols_;
Position_dependent_options options_;
};
@ -848,6 +857,19 @@ class Command_line
int
process_l_option(int, char**, char*, bool);
// Handle a -R option when it means --rpath.
void
add_to_rpath(const char* arg)
{ this->options_.add_to_rpath(arg); }
// Add a file for which we just read the symbols.
void
add_just_symbols_file(const char* arg)
{
this->inputs_.add_file(Input_file_argument(arg, false, "", true,
this->position_options_));
}
// Handle a --start-group option.
void
start_group(const char* arg);

4
gold/script.cc
View File

@ -1412,7 +1412,7 @@ read_script_file(const char* filename, Command_line* cmdline,
// so we invent a fake value.
const Task* task = reinterpret_cast<const Task*>(-1);
Input_file_argument input_argument(filename, false, "",
Input_file_argument input_argument(filename, false, "", false,
cmdline->position_dependent_options());
Input_file input_file(&input_argument);
if (!input_file.open(cmdline->options(), dirsearch, task))
@ -2038,7 +2038,7 @@ script_add_file(void* closurev, const char* name, size_t length)
}
Input_file_argument file(name_string.c_str(), false, extra_search_path,
closure->position_dependent_options());
false, closure->position_dependent_options());
closure->inputs()->add_file(file);
}

43
gold/symtab.cc
View File

@ -634,6 +634,8 @@ Symbol_table::add_from_relobj(
const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
const bool just_symbols = relobj->just_symbols();
const unsigned char* p = syms;
for (size_t i = 0; i < count; ++i, p += sym_size)
{
@ -701,6 +703,27 @@ Symbol_table::add_from_relobj(
local = true;
}
if (just_symbols)
{
if (psym != &sym2)
memcpy(symbuf, p, sym_size);
elfcpp::Sym_write<size, big_endian> sw(symbuf);
sw.put_st_shndx(elfcpp::SHN_ABS);
if (st_shndx != elfcpp::SHN_UNDEF
&& st_shndx < elfcpp::SHN_LORESERVE)
{
// Symbol values in object files are section relative.
// This is normally what we want, but since here we are
// converting the symbol to absolute we need to add the
// section address. The section address in an object
// file is normally zero, but people can use a linker
// script to change it.
sw.put_st_value(sym2.get_st_value()
+ relobj->section_address(st_shndx));
}
psym = &sym2;
}
Sized_symbol<size>* res;
if (ver == NULL)
{
@ -744,6 +767,12 @@ Symbol_table::add_from_dynobj(
gold_assert(size == dynobj->target()->get_size());
gold_assert(size == parameters->get_size());
if (dynobj->just_symbols())
{
gold_error(_("--just-symbols does not make sense with a shared object"));
return;
}
if (versym != NULL && versym_size / 2 < count)
{
dynobj->error(_("too few symbol versions"));
@ -1833,7 +1862,8 @@ Symbol_table::sized_write_globals(const Input_objects* input_objects,
}
unsigned int shndx;
typename elfcpp::Elf_types<32>::Elf_Addr value = sym->value();
typename elfcpp::Elf_types<size>::Elf_Addr sym_value = sym->value();
typename elfcpp::Elf_types<size>::Elf_Addr dynsym_value = sym_value;
switch (sym->source())
{
case Symbol::FROM_OBJECT:
@ -1854,7 +1884,7 @@ Symbol_table::sized_write_globals(const Input_objects* input_objects,
if (symobj->is_dynamic())
{
if (sym->needs_dynsym_value())
value = target->dynsym_value(sym);
dynsym_value = target->dynsym_value(sym);
shndx = elfcpp::SHN_UNDEF;
}
else if (in_shndx == elfcpp::SHN_UNDEF
@ -1868,6 +1898,11 @@ Symbol_table::sized_write_globals(const Input_objects* input_objects,
&secoff);
gold_assert(os != NULL);
shndx = os->out_shndx();
// In object files symbol values are section
// relative.
if (parameters->output_is_object())
sym_value -= os->address();
}
}
}
@ -1895,7 +1930,7 @@ Symbol_table::sized_write_globals(const Input_objects* input_objects,
gold_assert(sym_index < output_count);
unsigned char* ps = psyms + (sym_index * sym_size);
this->sized_write_symbol SELECT_SIZE_ENDIAN_NAME(size, big_endian) (
sym, sym->value(), shndx, sympool, ps
sym, sym_value, shndx, sympool, ps
SELECT_SIZE_ENDIAN(size, big_endian));
}
@ -1905,7 +1940,7 @@ Symbol_table::sized_write_globals(const Input_objects* input_objects,
gold_assert(dynsym_index < dynamic_count);
unsigned char* pd = dynamic_view + (dynsym_index * sym_size);
this->sized_write_symbol SELECT_SIZE_ENDIAN_NAME(size, big_endian) (
sym, value, shndx, dynpool, pd
sym, dynsym_value, shndx, dynpool, pd
SELECT_SIZE_ENDIAN(size, big_endian));
}
}

9
gold/testsuite/Makefile.am
View File

@ -541,6 +541,15 @@ script_test_2_SOURCES = script_test_2.cc script_test_2a.cc script_test_2b.cc
script_test_2_DEPENDENCIES = gcctestdir/ld script_test_2.t
script_test_2_LDFLAGS = -Bgcctestdir/ -Wl,-R,. -T $(srcdir)/script_test_2.t
check_PROGRAMS += justsyms
justsyms_SOURCES = justsyms_1.cc
justsyms_DEPENDENCIES = gcctestdir/ld justsyms_2r.o
justsyms_LDFLAGS = -Bgcctestdir/ -Wl,-R,justsyms_2r.o
justsyms_2.o: justsyms_2.cc
$(CXXCOMPILE) -c -o $@ $<
justsyms_2r.o: justsyms_2.o gcctestdir/ld
gcctestdir/ld -o $@ -r -T $(srcdir)/justsyms.t justsyms_2.o
if OBJDUMP_AND_CPPFILT
check_SCRIPTS += ver_matching_test.sh
check_DATA += ver_matching_test.stdout

38
gold/testsuite/Makefile.in
View File

@ -176,7 +176,7 @@ check_PROGRAMS = object_unittest$(EXEEXT) $(am__EXEEXT_1) \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ flagstest_o_specialfile \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ flagstest_o_specialfile_and_compress_debug_sections \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ ver_test script_test_1 \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ script_test_2
@GCC_TRUE@@NATIVE_LINKER_TRUE@ script_test_2 justsyms
@GCC_FALSE@script_test_1_DEPENDENCIES = libgoldtest.a ../libgold.a \
@GCC_FALSE@ ../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
@GCC_FALSE@ $(am__DEPENDENCIES_1)
@ -191,6 +191,13 @@ check_PROGRAMS = object_unittest$(EXEEXT) $(am__EXEEXT_1) \
@NATIVE_LINKER_FALSE@ ../libgold.a ../../libiberty/libiberty.a \
@NATIVE_LINKER_FALSE@ $(am__DEPENDENCIES_1) \
@NATIVE_LINKER_FALSE@ $(am__DEPENDENCIES_1)
@GCC_FALSE@justsyms_DEPENDENCIES = libgoldtest.a ../libgold.a \
@GCC_FALSE@ ../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
@GCC_FALSE@ $(am__DEPENDENCIES_1)
@NATIVE_LINKER_FALSE@justsyms_DEPENDENCIES = libgoldtest.a \
@NATIVE_LINKER_FALSE@ ../libgold.a ../../libiberty/libiberty.a \
@NATIVE_LINKER_FALSE@ $(am__DEPENDENCIES_1) \
@NATIVE_LINKER_FALSE@ $(am__DEPENDENCIES_1)
@GCC_TRUE@@NATIVE_LINKER_TRUE@@OBJDUMP_AND_CPPFILT_TRUE@am__append_11 = ver_matching_test.sh \
@GCC_TRUE@@NATIVE_LINKER_TRUE@@OBJDUMP_AND_CPPFILT_TRUE@ script_test_3.sh
@GCC_TRUE@@NATIVE_LINKER_TRUE@@OBJDUMP_AND_CPPFILT_TRUE@am__append_12 = ver_matching_test.stdout \
@ -264,7 +271,8 @@ libgoldtest_a_OBJECTS = $(am_libgoldtest_a_OBJECTS)
@GCC_TRUE@@NATIVE_LINKER_TRUE@ flagstest_o_specialfile_and_compress_debug_sections$(EXEEXT) \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ ver_test$(EXEEXT) \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ script_test_1$(EXEEXT) \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ script_test_2$(EXEEXT)
@GCC_TRUE@@NATIVE_LINKER_TRUE@ script_test_2$(EXEEXT) \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ justsyms$(EXEEXT)
@GCC_TRUE@@NATIVE_LINKER_TRUE@@OBJDUMP_AND_CPPFILT_TRUE@am__EXEEXT_8 = script_test_3$(EXEEXT)
basic_pic_test_SOURCES = basic_pic_test.c
basic_pic_test_OBJECTS = basic_pic_test.$(OBJEXT)
@ -375,6 +383,11 @@ flagstest_o_specialfile_and_compress_debug_sections_LDADD = $(LDADD)
flagstest_o_specialfile_and_compress_debug_sections_DEPENDENCIES = \
libgoldtest.a ../libgold.a ../../libiberty/libiberty.a \
$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
am__justsyms_SOURCES_DIST = justsyms_1.cc
@GCC_TRUE@@NATIVE_LINKER_TRUE@am_justsyms_OBJECTS = \
@GCC_TRUE@@NATIVE_LINKER_TRUE@ justsyms_1.$(OBJEXT)
justsyms_OBJECTS = $(am_justsyms_OBJECTS)
justsyms_LDADD = $(LDADD)
am_object_unittest_OBJECTS = object_unittest.$(OBJEXT)
object_unittest_OBJECTS = $(am_object_unittest_OBJECTS)
object_unittest_LDADD = $(LDADD)
@ -573,9 +586,10 @@ SOURCES = $(libgoldtest_a_SOURCES) basic_pic_test.c \
$(exception_static_test_SOURCES) $(exception_test_SOURCES) \
flagstest_compress_debug_sections.c flagstest_o_specialfile.c \
flagstest_o_specialfile_and_compress_debug_sections.c \
$(object_unittest_SOURCES) $(script_test_1_SOURCES) \
$(script_test_2_SOURCES) script_test_3.c \
$(tls_pic_test_SOURCES) $(tls_shared_ie_test_SOURCES) \
$(justsyms_SOURCES) $(object_unittest_SOURCES) \
$(script_test_1_SOURCES) $(script_test_2_SOURCES) \
script_test_3.c $(tls_pic_test_SOURCES) \
$(tls_shared_ie_test_SOURCES) \
$(tls_shared_nonpic_test_SOURCES) $(tls_shared_test_SOURCES) \
$(tls_static_pic_test_SOURCES) $(tls_static_test_SOURCES) \
$(tls_test_SOURCES) $(two_file_mixed_2_shared_test_SOURCES) \
@ -609,7 +623,8 @@ DIST_SOURCES = $(libgoldtest_a_SOURCES) basic_pic_test.c \
$(am__exception_test_SOURCES_DIST) \
flagstest_compress_debug_sections.c flagstest_o_specialfile.c \
flagstest_o_specialfile_and_compress_debug_sections.c \
$(object_unittest_SOURCES) $(am__script_test_1_SOURCES_DIST) \
$(am__justsyms_SOURCES_DIST) $(object_unittest_SOURCES) \
$(am__script_test_1_SOURCES_DIST) \
$(am__script_test_2_SOURCES_DIST) script_test_3.c \
$(am__tls_pic_test_SOURCES_DIST) \
$(am__tls_shared_ie_test_SOURCES_DIST) \
@ -1007,6 +1022,9 @@ object_unittest_SOURCES = object_unittest.cc
@GCC_TRUE@@NATIVE_LINKER_TRUE@script_test_2_SOURCES = script_test_2.cc script_test_2a.cc script_test_2b.cc
@GCC_TRUE@@NATIVE_LINKER_TRUE@script_test_2_DEPENDENCIES = gcctestdir/ld script_test_2.t
@GCC_TRUE@@NATIVE_LINKER_TRUE@script_test_2_LDFLAGS = -Bgcctestdir/ -Wl,-R,. -T $(srcdir)/script_test_2.t
@GCC_TRUE@@NATIVE_LINKER_TRUE@justsyms_SOURCES = justsyms_1.cc
@GCC_TRUE@@NATIVE_LINKER_TRUE@justsyms_DEPENDENCIES = gcctestdir/ld justsyms_2r.o
@GCC_TRUE@@NATIVE_LINKER_TRUE@justsyms_LDFLAGS = -Bgcctestdir/ -Wl,-R,justsyms_2r.o
all: all-am
.SUFFIXES:
@ -1119,6 +1137,9 @@ exception_test$(EXEEXT): $(exception_test_OBJECTS) $(exception_test_DEPENDENCIES
@NATIVE_LINKER_FALSE@flagstest_o_specialfile_and_compress_debug_sections$(EXEEXT): $(flagstest_o_specialfile_and_compress_debug_sections_OBJECTS) $(flagstest_o_specialfile_and_compress_debug_sections_DEPENDENCIES)
@NATIVE_LINKER_FALSE@ @rm -f flagstest_o_specialfile_and_compress_debug_sections$(EXEEXT)
@NATIVE_LINKER_FALSE@ $(LINK) $(flagstest_o_specialfile_and_compress_debug_sections_LDFLAGS) $(flagstest_o_specialfile_and_compress_debug_sections_OBJECTS) $(flagstest_o_specialfile_and_compress_debug_sections_LDADD) $(LIBS)
justsyms$(EXEEXT): $(justsyms_OBJECTS) $(justsyms_DEPENDENCIES)
@rm -f justsyms$(EXEEXT)
$(CXXLINK) $(justsyms_LDFLAGS) $(justsyms_OBJECTS) $(justsyms_LDADD) $(LIBS)
object_unittest$(EXEEXT): $(object_unittest_OBJECTS) $(object_unittest_DEPENDENCIES)
@rm -f object_unittest$(EXEEXT)
$(CXXLINK) $(object_unittest_LDFLAGS) $(object_unittest_OBJECTS) $(object_unittest_LDADD) $(LIBS)
@ -1236,6 +1257,7 @@ distclean-compile:
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/flagstest_compress_debug_sections.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/flagstest_o_specialfile.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/flagstest_o_specialfile_and_compress_debug_sections.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/justsyms_1.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/object_unittest.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/script_test_1.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/script_test_2.Po@am__quote@
@ -1692,6 +1714,10 @@ uninstall-am: uninstall-info-am
@GCC_TRUE@@NATIVE_LINKER_TRUE@ $(CXXCOMPILE) -c -fpic -o $@ $<
@GCC_TRUE@@NATIVE_LINKER_TRUE@ver_test_4.o: ver_test_4.cc
@GCC_TRUE@@NATIVE_LINKER_TRUE@ $(CXXCOMPILE) -c -fpic -o $@ $<
@GCC_TRUE@@NATIVE_LINKER_TRUE@justsyms_2.o: justsyms_2.cc
@GCC_TRUE@@NATIVE_LINKER_TRUE@ $(CXXCOMPILE) -c -o $@ $<
@GCC_TRUE@@NATIVE_LINKER_TRUE@justsyms_2r.o: justsyms_2.o gcctestdir/ld
@GCC_TRUE@@NATIVE_LINKER_TRUE@ gcctestdir/ld -o $@ -r -T $(srcdir)/justsyms.t justsyms_2.o
@GCC_TRUE@@NATIVE_LINKER_TRUE@@OBJDUMP_AND_CPPFILT_TRUE@ver_matching_def.so: ver_matching_def.cc gcctestdir/ld
@GCC_TRUE@@NATIVE_LINKER_TRUE@@OBJDUMP_AND_CPPFILT_TRUE@ $(CXXLINK) -O0 -Bgcctestdir/ -shared $(srcdir)/ver_matching_def.cc -Wl,--version-script=$(srcdir)/version_script.map
@GCC_TRUE@@NATIVE_LINKER_TRUE@@OBJDUMP_AND_CPPFILT_TRUE@ver_matching_test.stdout: ver_matching_def.so

31
gold/testsuite/justsyms.t Normal file
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@ -0,0 +1,31 @@
/* justsyms.t -- test --just-symbols for gold.
Copyright 2008 Free Software Foundation, Inc.
Written by Ian Lance Taylor <iant@google.com>.
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. */
SECTIONS
{
/* This script is only used for a .o file. */
. = 0x10000;
.gold_test : { *(.gold_test) }
.text : { *(.text) }
.data : { *(.data) }
.bss : { *(.bss) }
}

54
gold/testsuite/justsyms_1.cc Normal file
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@ -0,0 +1,54 @@
// justsyms_1.cc -- test --just-symbols for gold
// Copyright 2008 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// 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.
// The Linux kernel builds an object file using a linker script, and
// then links against that object file using the -R option. This is a
// test for that usage.
#include <cassert>
#include <csignal>
#include <cstddef>
#include <cstdlib>
#include <stdint.h>
extern char justsyms_string[];
// We expect to get a SIGSEGV.
static void
handle_sigsegv(int)
{
exit(0);
}
int
main(int, char**)
{
// The linker script should arrange for this symbol to be exactly at
// address 0x10000.
assert(reinterpret_cast<uintptr_t>(justsyms_string) == 0x10000);
// However, since the file was linked with --just-symbols, we should
// not be able to actually access the symbol.
signal(SIGSEGV, handle_sigsegv);
char c = justsyms_string[0];
exit(c == '\0' ? 1 : c);
}

27
gold/testsuite/justsyms_2.cc Normal file
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@ -0,0 +1,27 @@
// justsyms_2.cc -- test --just-symbols for gold
// Copyright 2008 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// 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.
// This test goes with justsyms_1.cc. We compile this file, then
// apply a linker script with -r to set the section addresses.
char justsyms_string[] __attribute__ ((section(".gold_test"))) =
"justsyms string";