+2010-12-15 H.J. Lu <hongjiu.lu@intel.com>
+
+ * elf.c (_bfd_elf_new_section_hook): Special handling for
+ .init_array/.fini_array output sections.
+
2010-12-13 Alan Modra <amodra@gmail.com>
* aoutx.h (aout_link_check_ar_symbols): Formatting.
anyway. We will set ELF section type and flags for all linker
created sections. If user specifies BFD section flags, we will
set ELF section type and flags based on BFD section flags in
- elf_fake_sections. */
- if ((!sec->flags && abfd->direction != read_direction)
+ elf_fake_sections. Special handling for .init_array/.fini_array
+ output sections since they may contain .ctors/.dtors input
+ sections. We don't want _bfd_elf_init_private_section_data to
+ copy ELF section type from .ctors/.dtors input sections. */
+ if (abfd->direction != read_direction
|| (sec->flags & SEC_LINKER_CREATED) != 0)
{
ssect = (*bed->get_sec_type_attr) (abfd, sec);
- if (ssect != NULL)
+ if (ssect != NULL
+ && (!sec->flags
+ || (sec->flags & SEC_LINKER_CREATED) != 0
+ || ssect->type == SHT_INIT_ARRAY
+ || ssect->type == SHT_FINI_ARRAY))
{
elf_section_type (sec) = ssect->type;
elf_section_flags (sec) = ssect->attr;
+2010-12-15 H.J. Lu <hongjiu.lu@intel.com>
+
+ * Makefile.am (GENSCRIPTS): Add @enable_initfini_array@.
+
+ * NEWS: Mention SORT_BY_INIT_PRIORITY.
+
+ * configure.in: Add AC_CANONICAL_BUILD.
+ Add --enable-initfini-array.
+
+ * genscripts.sh (ENABLE_INITFINI_ARRAY): New.
+
+ * ld.h (sort_type): Add by_init_priority.
+
+ * ld.texinfo: Document SORT_BY_INIT_PRIORITY.
+
+ * ldgram.y (SORT_BY_INIT_PRIORITY): New.
+ (wildcard_spec): Handle SORT_BY_INIT_PRIORITY.
+
+ * ldlang.c (get_init_priority): New.
+ (compare_section): Use get_init_priority for by_init_priority.
+
+ * ldlex.l (SORT_BY_INIT_PRIORITY): New.
+
+ * scripttempl/elf.sc: Support ENABLE_INITFINI_ARRAY.
+
+ * Makefile.in: Regenerated.
+ * aclocal.m4: Regenerated.
+ * config.in: Likewise.
+ * configure: Likewise.
+
2010-12-13 Alan Modra <amodra@gmail.com>
* ldlang.c (load_symbols): Correct last change.
# These all start with e so 'make clean' can find them.
-GENSCRIPTS = LIB_PATH='${LIB_PATH}' $(SHELL) $(srcdir)/genscripts.sh "${srcdir}" "${libdir}" "${prefix}" "${exec_prefix}" @host@ @target@ @target_alias@ "@EMULATION_LIBPATH@" "@NATIVE_LIB_DIRS@" @use_sysroot@
+GENSCRIPTS = LIB_PATH='${LIB_PATH}' $(SHELL) $(srcdir)/genscripts.sh "${srcdir}" "${libdir}" "${prefix}" "${exec_prefix}" @host@ @target@ @target_alias@ "@EMULATION_LIBPATH@" "@NATIVE_LIB_DIRS@" @use_sysroot@ @enable_initfini_array@
GEN_DEPENDS = $(srcdir)/genscripts.sh stringify.sed
ELF_DEPS = $(srcdir)/emultempl/elf32.em $(srcdir)/emultempl/elf-generic.em
ELF_GEN_DEPS = $(srcdir)/emultempl/generic.em $(srcdir)/emultempl/elf-generic.em $(srcdir)/emultempl/genelf.em
do_compare = @do_compare@
docdir = @docdir@
dvidir = @dvidir@
+enable_initfini_array = @enable_initfini_array@
exec_prefix = @exec_prefix@
host = @host@
host_alias = @host_alias@
POTFILES = $(CFILES) $(HFILES) $(EMULATION_FILES)
# These all start with e so 'make clean' can find them.
-GENSCRIPTS = LIB_PATH='${LIB_PATH}' $(SHELL) $(srcdir)/genscripts.sh "${srcdir}" "${libdir}" "${prefix}" "${exec_prefix}" @host@ @target@ @target_alias@ "@EMULATION_LIBPATH@" "@NATIVE_LIB_DIRS@" @use_sysroot@
+GENSCRIPTS = LIB_PATH='${LIB_PATH}' $(SHELL) $(srcdir)/genscripts.sh "${srcdir}" "${libdir}" "${prefix}" "${exec_prefix}" @host@ @target@ @target_alias@ "@EMULATION_LIBPATH@" "@NATIVE_LIB_DIRS@" @use_sysroot@ @enable_initfini_array@
GEN_DEPENDS = $(srcdir)/genscripts.sh stringify.sed
ELF_DEPS = $(srcdir)/emultempl/elf32.em $(srcdir)/emultempl/elf-generic.em
ELF_GEN_DEPS = $(srcdir)/emultempl/generic.em $(srcdir)/emultempl/elf-generic.em $(srcdir)/emultempl/genelf.em
-*- text -*-
+* Added SORT_BY_INIT_PRIORITY to the linker script language to permit
+sorting sections by numerical value of the GCC init_priority attribute
+encoded in the section name.
+
Changes in 2.21:
/* Define to 1 if you have the `glob' function. */
#undef HAVE_GLOB
+/* Define .init_array/.fini_array sections are available and working. */
+#undef HAVE_INITFINI_ARRAY
+
/* Define to 1 if you have the <inttypes.h> header file. */
#undef HAVE_INTTYPES_H
EMULATION_OFILES
EMUL
STRINGIFY
+enable_initfini_array
ENABLE_PLUGINS_FALSE
ENABLE_PLUGINS_TRUE
NATIVE_LIB_DIRS
with_gnu_ld
enable_libtool_lock
enable_nls
+enable_initfini_array
'
ac_precious_vars='build_alias
host_alias
optimize for fast installation [default=yes]
--disable-libtool-lock avoid locking (might break parallel builds)
--disable-nls do not use Native Language Support
+ --enable-initfini-array use .init_array/.fini_array sections
Optional Packages:
--with-PACKAGE[=ARG] use PACKAGE [ARG=yes]
test "$program_prefix$program_suffix$program_transform_name" = \
NONENONEs,x,x, &&
program_prefix=${target_alias}-
+
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 11625 "configure"
+#line 11629 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 11731 "configure"
+#line 11735 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
fi
+# Check whether --enable-initfini-array was given.
+if test "${enable_initfini_array+set}" = set; then :
+ enableval=$enable_initfini_array;
+else
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for .preinit_array/.init_array/.fini_array support" >&5
+$as_echo_n "checking for .preinit_array/.init_array/.fini_array support... " >&6; }
+if test "${gcc_cv_initfini_array+set}" = set; then :
+ $as_echo_n "(cached) " >&6
+else
+ if test "x${build}" = "x${target}" ; then
+ if test "$cross_compiling" = yes; then :
+ gcc_cv_initfini_array=no
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+static int x = -1;
+int main (void) { return x; }
+int foo (void) { x = 0; }
+int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;
+_ACEOF
+if ac_fn_c_try_run "$LINENO"; then :
+ gcc_cv_initfini_array=yes
+else
+ gcc_cv_initfini_array=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+ conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+ else
+ gcc_cv_initfini_array=no
+ fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_initfini_array" >&5
+$as_echo "$gcc_cv_initfini_array" >&6; }
+ enable_initfini_array=$gcc_cv_initfini_array
+
+fi
+
+
+if test $enable_initfini_array = yes; then
+
+$as_echo "#define HAVE_INITFINI_ARRAY 1" >>confdefs.h
+
+fi
+
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a known getopt prototype in unistd.h" >&5
$as_echo_n "checking for a known getopt prototype in unistd.h... " >&6; }
if test "${ld_cv_decl_getopt_unistd_h+set}" = set; then :
AC_CONFIG_SRCDIR(ldmain.c)
AC_CANONICAL_TARGET
+AC_CANONICAL_BUILD
AC_ISC_POSIX
changequote(,)dnl
fi
AM_CONDITIONAL([ENABLE_PLUGINS], [test x$enable_plugins = xyes])
+AC_ARG_ENABLE(initfini-array,
+ [ --enable-initfini-array use .init_array/.fini_array sections],
+ [], [
+AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support,
+ gcc_cv_initfini_array, [dnl
+ if test "x${build}" = "x${target}" ; then
+ AC_RUN_IFELSE([AC_LANG_SOURCE([
+static int x = -1;
+int main (void) { return x; }
+int foo (void) { x = 0; }
+int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;])],
+ [gcc_cv_initfini_array=yes], [gcc_cv_initfini_array=no],
+ [gcc_cv_initfini_array=no])
+ else
+ gcc_cv_initfini_array=no
+ fi])
+ enable_initfini_array=$gcc_cv_initfini_array
+])
+AC_SUBST(enable_initfini_array)
+if test $enable_initfini_array = yes; then
+ AC_DEFINE(HAVE_INITFINI_ARRAY, 1,
+ [Define .init_array/.fini_array sections are available and working.])
+fi
+
AC_MSG_CHECKING(for a known getopt prototype in unistd.h)
AC_CACHE_VAL(ld_cv_decl_getopt_unistd_h,
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <unistd.h>], [extern int getopt (int, char *const*, const char *);])],
# default_emulation \
# native_lib_dirs \
# use_sysroot \
+# enable_initfini_array \
# this_emulation \
# optional:
# tool_dir \
NATIVE_LIB_DIRS=$9
shift 9
use_sysroot=$1
-EMULATION_NAME=$2
-TOOL_LIB=$3
-CUSTOMIZER_SCRIPT=$4
+ENABLE_INITFINI_ARRAY=$2
+EMULATION_NAME=$3
+TOOL_LIB=$4
+CUSTOMIZER_SCRIPT=$5
# Can't use ${TOOL_LIB:-$target_alias} here due to an Ultrix shell bug.
if [ "x${TOOL_LIB}" = "x" ] ; then
/* A wildcard specification. */
typedef enum {
- none, by_name, by_alignment, by_name_alignment, by_alignment_name
+ none, by_name, by_alignment, by_name_alignment, by_alignment_name,
+ by_init_priority
} sort_type;
extern sort_type sort_section;
difference is @code{SORT_BY_ALIGNMENT} will sort sections into
ascending order by alignment before placing them in the output file.
+@cindex SORT_BY_INIT_PRIORITY
+@code{SORT_BY_INIT_PRIORITY} is very similar to @code{SORT_BY_NAME}. The
+difference is @code{SORT_BY_INIT_PRIORITY} will sort sections into
+ascending order by numerical value of the GCC init_priority attribute
+encoded in the section name before placing them in the output file.
+
@cindex SORT
@code{SORT} is an alias for @code{SORT_BY_NAME}.
%token SECTIONS PHDRS INSERT_K AFTER BEFORE
%token DATA_SEGMENT_ALIGN DATA_SEGMENT_RELRO_END DATA_SEGMENT_END
%token SORT_BY_NAME SORT_BY_ALIGNMENT
+%token SORT_BY_INIT_PRIORITY
%token '{' '}'
%token SIZEOF_HEADERS OUTPUT_FORMAT FORCE_COMMON_ALLOCATION OUTPUT_ARCH
%token INHIBIT_COMMON_ALLOCATION
$$.sorted = by_name;
$$.exclude_name_list = $5;
}
+ | SORT_BY_INIT_PRIORITY '(' wildcard_name ')'
+ {
+ $$.name = $3;
+ $$.sorted = by_init_priority;
+ $$.exclude_name_list = NULL;
+ }
;
exclude_name_list:
return TRUE;
}
+/* Return the numerical value of the init_priority attribute from
+ section name NAME. */
+
+static unsigned long
+get_init_priority (const char *name)
+{
+ char *end;
+ unsigned long init_priority;
+
+ /* GCC uses the following section names for the init_priority
+ attribute with numerical values 101 and 65535 inclusive. A
+ lower value means a higher priority.
+
+ 1: .init_array.NNNN/.fini_array.NNNN: Where NNNN is the
+ decimal numerical value of the init_priority attribute.
+ The order of execution in .init_array is forward and
+ .fini_array is backward.
+ 2: .ctors.NNNN/.ctors.NNNN: Where NNNN is 65535 minus the
+ decimal numerical value of the init_priority attribute.
+ The order of execution in .ctors is backward and .dtors
+ is forward.
+ */
+ if (strncmp (name, ".init_array.", 12) == 0
+ || strncmp (name, ".fini_array.", 12) == 0)
+ {
+ init_priority = strtoul (name + 12, &end, 10);
+ return *end ? 0 : init_priority;
+ }
+ else if (strncmp (name, ".ctors.", 7) == 0
+ || strncmp (name, ".dtors.", 7) == 0)
+ {
+ init_priority = strtoul (name + 7, &end, 10);
+ return *end ? 0 : 65535 - init_priority;
+ }
+
+ return 0;
+}
+
/* Compare sections ASEC and BSEC according to SORT. */
static int
compare_section (sort_type sort, asection *asec, asection *bsec)
{
int ret;
+ unsigned long ainit_priority, binit_priority;
switch (sort)
{
default:
abort ();
+ case by_init_priority:
+ ainit_priority
+ = get_init_priority (bfd_get_section_name (asec->owner, asec));
+ binit_priority
+ = get_init_priority (bfd_get_section_name (bsec->owner, bsec));
+ if (ainit_priority == 0 || binit_priority == 0)
+ goto sort_by_name;
+ ret = ainit_priority - binit_priority;
+ if (ret)
+ break;
+ else
+ goto sort_by_name;
+
case by_alignment_name:
ret = (bfd_section_alignment (bsec->owner, bsec)
- bfd_section_alignment (asec->owner, asec));
/* Fall through. */
case by_name:
+sort_by_name:
ret = strcmp (bfd_get_section_name (asec->owner, asec),
bfd_get_section_name (bsec->owner, bsec));
break;
<BOTH,SCRIPT>"SORT_BY_NAME" { RTOKEN(SORT_BY_NAME); }
<BOTH,SCRIPT>"SORT_BY_ALIGNMENT" { RTOKEN(SORT_BY_ALIGNMENT); }
<BOTH,SCRIPT>"SORT" { RTOKEN(SORT_BY_NAME); }
+<BOTH,SCRIPT>"SORT_BY_INIT_PRIORITY" { RTOKEN(SORT_BY_INIT_PRIORITY); }
<EXPRESSION,BOTH,SCRIPT>"NOLOAD" { RTOKEN(NOLOAD);}
<EXPRESSION,BOTH,SCRIPT>"DSECT" { RTOKEN(DSECT);}
<EXPRESSION,BOTH,SCRIPT>"COPY" { RTOKEN(COPY);}
*(.ldata${RELOCATING+ .ldata.* .gnu.linkonce.l.*})
${RELOCATING+. = ALIGN(. != 0 ? ${ALIGNMENT} : 1);}
}"
+if test "${ENABLE_INITFINI_ARRAY}" = "yes"; then
+ SORT_INIT_ARRAY="KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))"
+ SORT_FINI_ARRAY="KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))"
+ CTORS_IN_INIT_ARRAY="KEEP (*(EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .ctors))"
+ DTORS_IN_FINI_ARRAY="KEEP (*(EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors))"
+else
+ SORT_INIT_ARRAY="KEEP (*(SORT(.init_array.*)))"
+ SORT_FINI_ARRAY="KEEP (*(SORT(.fini_array.*)))"
+ CTORS_IN_INIT_ARRAY=
+ DTORS_IN_FINI_ARRAY=
+fi
INIT_ARRAY=".init_array ${RELOCATING-0} :
{
${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__init_array_start = .);}}
- KEEP (*(SORT(.init_array.*)))
+ ${SORT_INIT_ARRAY}
KEEP (*(.init_array))
+ ${CTORS_IN_INIT_ARRAY}
${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__init_array_end = .);}}
}"
FINI_ARRAY=".fini_array ${RELOCATING-0} :
{
${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__fini_array_start = .);}}
- KEEP (*(SORT(.fini_array.*)))
+ ${SORT_FINI_ARRAY}
KEEP (*(.fini_array))
+ ${DTORS_IN_FINI_ARRAY}
${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (${USER_LABEL_PREFIX}__fini_array_end = .);}}
}"
CTOR=".ctors ${CONSTRUCTING-0} :
+2010-12-15 H.J. Lu <hongjiu.lu@intel.com>
+
+ * ld-elf/elf.exp (array_tests): Add init-mixed.
+ (array_tests_static): Likewise.
+ Also delete tmpdir/init-mixed.
+
+ * ld-elf/init-mixed.c: New.
+ * ld-elf/init-mixed.out: Likewise.
+
2010-12-11 Alan Modra <amodra@gmail.com>
* ld-elfvers/vers25a.dsym: Really include _? in match.
{"preinit array" "" "" {preinit.c} "preinit" "preinit.out"}
{"init array" "" "" {init.c} "init" "init.out"}
{"fini array" "" "" {fini.c} "fini" "fini.out"}
+ {"init array mixed" "" "" {init-mixed.c} "init-mixed" "init-mixed.out" "-I."}
}
set array_tests_static {
{"static preinit array" "-static" "" {preinit.c} "preinit" "preinit.out"}
{"static init array" "-static" "" {init.c} "init" "init.out"}
{"static fini array" "-static" "" {fini.c} "fini" "fini.out"}
+ {"static init array mixed" "" "" {init-mixed.c} "init-mixed" "init-mixed.out" "-I."}
}
# NetBSD ELF systems do not currently support the .*_array sections.
}
run_ld_link_exec_tests $xfails $array_tests_static
-catch "exec rm -f tmpdir/preinit tmpdir/init tmpdir/fini" status
+catch "exec rm -f tmpdir/preinit tmpdir/init tmpdir/fini tmpdir/init-mixed" status
--- /dev/null
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "config.h"
+
+#ifdef HAVE_INITFINI_ARRAY
+static int count;
+
+static void
+init1005 ()
+{
+ if (count != 0)
+ abort ();
+ count = 1005;
+}
+void (*const init_array1005[]) ()
+ __attribute__ ((section (".init_array.01005"), aligned (sizeof (void *))))
+ = { init1005 };
+static void
+fini1005 ()
+{
+ if (count != 1005)
+ abort ();
+}
+void (*const fini_array1005[]) ()
+ __attribute__ ((section (".fini_array.01005"), aligned (sizeof (void *))))
+ = { fini1005 };
+
+static void
+ctor1007 ()
+{
+ if (count != 1005)
+ abort ();
+ count = 1007;
+}
+void (*const ctors1007[]) ()
+ __attribute__ ((section (".ctors.64528"), aligned (sizeof (void *))))
+ = { ctor1007 };
+static void
+dtor1007 ()
+{
+ if (count != 1007)
+ abort ();
+ count = 1005;
+}
+void (*const dtors1007[]) ()
+ __attribute__ ((section (".dtors.64528"), aligned (sizeof (void *))))
+ = { dtor1007 };
+
+static void
+init65530 ()
+{
+ if (count != 1007)
+ abort ();
+ count = 65530;
+}
+void (*const init_array65530[]) ()
+ __attribute__ ((section (".init_array.65530"), aligned (sizeof (void *))))
+ = { init65530 };
+static void
+fini65530 ()
+{
+ if (count != 65530)
+ abort ();
+ count = 1007;
+}
+void (*const fini_array65530[]) ()
+ __attribute__ ((section (".fini_array.65530"), aligned (sizeof (void *))))
+ = { fini65530 };
+
+static void
+ctor65535 ()
+{
+ if (count != 65530)
+ abort ();
+ count = 65535;
+}
+void (*const ctors65535[]) ()
+ __attribute__ ((section (".ctors"), aligned (sizeof (void *))))
+ = { ctor65535 };
+static void
+dtor65535 ()
+{
+ if (count != 65535)
+ abort ();
+ count = 65530;
+}
+void (*const dtors65535[]) ()
+ __attribute__ ((section (".dtors"), aligned (sizeof (void *))))
+ = { dtor65535 };
+#endif
+
+int
+main ()
+{
+ printf ("OK\n");
+ return 0;
+}
projects / external / binutils.git / commitdiff