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-rw-r--r--ld/Makefile.am6
-rw-r--r--ld/Makefile.in12
-rw-r--r--ld/NEWS6
-rw-r--r--ld/aclocal.m41
-rw-r--r--ld/config.in3
-rwxr-xr-xld/configure270
-rw-r--r--ld/configure.ac26
-rw-r--r--ld/emultempl/elf.em9
-rw-r--r--ld/ld.texi12
-rw-r--r--ld/ldelf.c135
-rw-r--r--ld/ldelf.h2
-rw-r--r--ld/lexsup.c2
-rw-r--r--ld/testsuite/ld-bootstrap/bootstrap.exp6
-rw-r--r--ld/testsuite/ld-elf/package-note.exp45
-rw-r--r--ld/testsuite/ld-elf/package-note.rd6
15 files changed, 531 insertions, 10 deletions
diff --git a/ld/Makefile.am b/ld/Makefile.am
index e53bef1..a3cd789 100644
--- a/ld/Makefile.am
+++ b/ld/Makefile.am
@@ -45,7 +45,7 @@ ELF_CLFAGS=-DELF_LIST_OPTIONS=@elf_list_options@ \
-DELF_PLT_UNWIND_LIST_OPTIONS=@elf_plt_unwind_list_options@
WARN_CFLAGS = @WARN_CFLAGS@
NO_WERROR = @NO_WERROR@
-AM_CFLAGS = $(WARN_CFLAGS) $(ELF_CLFAGS)
+AM_CFLAGS = $(WARN_CFLAGS) $(ELF_CLFAGS) $(JANSSON_CFLAGS)
# We put the scripts in the directory $(scriptdir)/ldscripts.
# We can't put the scripts in $(datadir) because the SEARCH_DIR
@@ -964,8 +964,8 @@ ld_new_SOURCES = ldgram.y ldlex-wrapper.c lexsup.c ldlang.c mri.c ldctor.c ldmai
ldwrite.c ldexp.c ldemul.c ldver.c ldmisc.c ldfile.c ldcref.c plugin.c \
ldbuildid.c
ld_new_DEPENDENCIES = $(EMULATION_OFILES) $(EMUL_EXTRA_OFILES) \
- $(BFDLIB) $(LIBCTF) $(LIBIBERTY) $(LIBINTL_DEP)
-ld_new_LDADD = $(EMULATION_OFILES) $(EMUL_EXTRA_OFILES) $(BFDLIB) $(LIBCTF) $(LIBIBERTY) $(LIBINTL) $(ZLIB)
+ $(BFDLIB) $(LIBCTF) $(LIBIBERTY) $(LIBINTL_DEP) $(JANSSON_LIBS)
+ld_new_LDADD = $(EMULATION_OFILES) $(EMUL_EXTRA_OFILES) $(BFDLIB) $(LIBCTF) $(LIBIBERTY) $(LIBINTL) $(ZLIB) $(JANSSON_LIBS)
# Dependency tracking for the generated emulation files.
EXTRA_ld_new_SOURCES += $(ALL_EMULATION_SOURCES) $(ALL_64_EMULATION_SOURCES)
diff --git a/ld/Makefile.in b/ld/Makefile.in
index 811490d..58fdbe8 100644
--- a/ld/Makefile.in
+++ b/ld/Makefile.in
@@ -122,6 +122,7 @@ am__aclocal_m4_deps = $(top_srcdir)/../bfd/acinclude.m4 \
$(top_srcdir)/../config/lead-dot.m4 \
$(top_srcdir)/../config/nls.m4 \
$(top_srcdir)/../config/override.m4 \
+ $(top_srcdir)/../config/pkg.m4 \
$(top_srcdir)/../config/plugins.m4 \
$(top_srcdir)/../config/po.m4 \
$(top_srcdir)/../config/progtest.m4 \
@@ -405,6 +406,8 @@ INSTALL_PROGRAM = @INSTALL_PROGRAM@
INSTALL_SCRIPT = @INSTALL_SCRIPT@
INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
INSTOBJEXT = @INSTOBJEXT@
+JANSSON_CFLAGS = @JANSSON_CFLAGS@
+JANSSON_LIBS = @JANSSON_LIBS@
LARGEFILE_CPPFLAGS = @LARGEFILE_CPPFLAGS@
LD = @LD@
LDFLAGS = @LDFLAGS@
@@ -450,6 +453,9 @@ PACKAGE_TARNAME = @PACKAGE_TARNAME@
PACKAGE_URL = @PACKAGE_URL@
PACKAGE_VERSION = @PACKAGE_VERSION@
PATH_SEPARATOR = @PATH_SEPARATOR@
+PKG_CONFIG = @PKG_CONFIG@
+PKG_CONFIG_LIBDIR = @PKG_CONFIG_LIBDIR@
+PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
POSUB = @POSUB@
RANLIB = @RANLIB@
SED = @SED@
@@ -558,7 +564,7 @@ ELF_CLFAGS = -DELF_LIST_OPTIONS=@elf_list_options@ \
-DELF_SHLIB_LIST_OPTIONS=@elf_shlib_list_options@ \
-DELF_PLT_UNWIND_LIST_OPTIONS=@elf_plt_unwind_list_options@
-AM_CFLAGS = $(WARN_CFLAGS) $(ELF_CLFAGS)
+AM_CFLAGS = $(WARN_CFLAGS) $(ELF_CLFAGS) $(JANSSON_CFLAGS)
# We put the scripts in the directory $(scriptdir)/ldscripts.
# We can't put the scripts in $(datadir) because the SEARCH_DIR
@@ -1006,9 +1012,9 @@ ld_new_SOURCES = ldgram.y ldlex-wrapper.c lexsup.c ldlang.c mri.c ldctor.c ldmai
ldbuildid.c
ld_new_DEPENDENCIES = $(EMULATION_OFILES) $(EMUL_EXTRA_OFILES) \
- $(BFDLIB) $(LIBCTF) $(LIBIBERTY) $(LIBINTL_DEP)
+ $(BFDLIB) $(LIBCTF) $(LIBIBERTY) $(LIBINTL_DEP) $(JANSSON_LIBS)
-ld_new_LDADD = $(EMULATION_OFILES) $(EMUL_EXTRA_OFILES) $(BFDLIB) $(LIBCTF) $(LIBIBERTY) $(LIBINTL) $(ZLIB)
+ld_new_LDADD = $(EMULATION_OFILES) $(EMUL_EXTRA_OFILES) $(BFDLIB) $(LIBCTF) $(LIBIBERTY) $(LIBINTL) $(ZLIB) $(JANSSON_LIBS)
#
#
# Build a dummy plugin using libtool.
diff --git a/ld/NEWS b/ld/NEWS
index 514d1d9..d580825 100644
--- a/ld/NEWS
+++ b/ld/NEWS
@@ -36,6 +36,12 @@
* Remove (rudimentary) support for the x86-64 sub-architectures Intel L1OM and
Intel K1OM.
+* The ELF linker now supports a new --package-metadata option that allows
+ embedding a JSON payload in accordance to the Package Metadata specification.
+ If support for libjansson is enabled at build time, the linker will use it to
+ validate the input. This can be enabled with --enable-jansson.
+ For more details, see: https://systemd.io/ELF_PACKAGE_METADATA/
+
Changes in 2.38:
* Add -z pack-relative-relocs/-z no pack-relative-relocs to x86 ELF
diff --git a/ld/aclocal.m4 b/ld/aclocal.m4
index 631ead7..d20c542 100644
--- a/ld/aclocal.m4
+++ b/ld/aclocal.m4
@@ -1198,6 +1198,7 @@ m4_include([../config/lcmessage.m4])
m4_include([../config/lead-dot.m4])
m4_include([../config/nls.m4])
m4_include([../config/override.m4])
+m4_include([../config/pkg.m4])
m4_include([../config/plugins.m4])
m4_include([../config/po.m4])
m4_include([../config/progtest.m4])
diff --git a/ld/config.in b/ld/config.in
index cc5b476..d4c1fc4 100644
--- a/ld/config.in
+++ b/ld/config.in
@@ -100,6 +100,9 @@
/* Define to 1 if you have the <inttypes.h> header file. */
#undef HAVE_INTTYPES_H
+/* The jansson library is to be used */
+#undef HAVE_JANSSON
+
/* Define if your <locale.h> file defines LC_MESSAGES. */
#undef HAVE_LC_MESSAGES
diff --git a/ld/configure b/ld/configure
index 16db825..80db525 100755
--- a/ld/configure
+++ b/ld/configure
@@ -677,6 +677,11 @@ WARN_WRITE_STRINGS
NO_WERROR
WARN_CFLAGS_FOR_BUILD
WARN_CFLAGS
+JANSSON_LIBS
+JANSSON_CFLAGS
+PKG_CONFIG_LIBDIR
+PKG_CONFIG_PATH
+PKG_CONFIG
enable_libctf
ENABLE_LIBCTF_FALSE
ENABLE_LIBCTF_TRUE
@@ -845,6 +850,7 @@ enable_error_handling_script
enable_default_hash_style
enable_initfini_array
enable_libctf
+enable_jansson
enable_werror
enable_build_warnings
enable_nls
@@ -863,6 +869,11 @@ CXXFLAGS
CCC
CPP
CXXCPP
+PKG_CONFIG
+PKG_CONFIG_PATH
+PKG_CONFIG_LIBDIR
+JANSSON_CFLAGS
+JANSSON_LIBS
YACC
YFLAGS'
@@ -1527,6 +1538,7 @@ Optional Features:
use this default hash style
--disable-initfini-array do not use .init_array/.fini_array sections
--enable-libctf Handle .ctf type-info sections [default=yes]
+ --enable-jansson enable jansson [default=no]
--enable-werror treat compile warnings as errors
--enable-build-warnings enable build-time compiler warnings
--disable-nls do not use Native Language Support
@@ -1553,6 +1565,15 @@ Some influential environment variables:
CXXFLAGS C++ compiler flags
CPP C preprocessor
CXXCPP C++ preprocessor
+ PKG_CONFIG path to pkg-config utility
+ PKG_CONFIG_PATH
+ directories to add to pkg-config's search path
+ PKG_CONFIG_LIBDIR
+ path overriding pkg-config's built-in search path
+ JANSSON_CFLAGS
+ C compiler flags for JANSSON, overriding pkg-config
+ JANSSON_LIBS
+ linker flags for JANSSON, overriding pkg-config
YACC The `Yet Another Compiler Compiler' implementation to use.
Defaults to the first program found out of: `bison -y', `byacc',
`yacc'.
@@ -11470,7 +11491,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 11473 "configure"
+#line 11494 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -11576,7 +11597,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 11579 "configure"
+#line 11600 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@@ -15555,6 +15576,251 @@ fi
+# Used to validate --package-metadata= input. Disabled by default.
+# Check whether --enable-jansson was given.
+if test "${enable_jansson+set}" = set; then :
+ enableval=$enable_jansson; enable_jansson=$enableval
+else
+ enable_jansson="no"
+fi
+
+
+if test "x$enable_jansson" != "xno"; then
+
+
+
+
+
+
+
+if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
+ if test -n "$ac_tool_prefix"; then
+ # Extract the first word of "${ac_tool_prefix}pkg-config", so it can be a program name with args.
+set dummy ${ac_tool_prefix}pkg-config; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_PKG_CONFIG+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ case $PKG_CONFIG in
+ [\\/]* | ?:[\\/]*)
+ ac_cv_path_PKG_CONFIG="$PKG_CONFIG" # Let the user override the test with a path.
+ ;;
+ *)
+ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+ IFS=$as_save_IFS
+ test -z "$as_dir" && as_dir=.
+ for ac_exec_ext in '' $ac_executable_extensions; do
+ if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+ ac_cv_path_PKG_CONFIG="$as_dir/$ac_word$ac_exec_ext"
+ $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+ break 2
+ fi
+done
+ done
+IFS=$as_save_IFS
+
+ ;;
+esac
+fi
+PKG_CONFIG=$ac_cv_path_PKG_CONFIG
+if test -n "$PKG_CONFIG"; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PKG_CONFIG" >&5
+$as_echo "$PKG_CONFIG" >&6; }
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_path_PKG_CONFIG"; then
+ ac_pt_PKG_CONFIG=$PKG_CONFIG
+ # Extract the first word of "pkg-config", so it can be a program name with args.
+set dummy pkg-config; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_path_ac_pt_PKG_CONFIG+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ case $ac_pt_PKG_CONFIG in
+ [\\/]* | ?:[\\/]*)
+ ac_cv_path_ac_pt_PKG_CONFIG="$ac_pt_PKG_CONFIG" # Let the user override the test with a path.
+ ;;
+ *)
+ as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+ IFS=$as_save_IFS
+ test -z "$as_dir" && as_dir=.
+ for ac_exec_ext in '' $ac_executable_extensions; do
+ if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+ ac_cv_path_ac_pt_PKG_CONFIG="$as_dir/$ac_word$ac_exec_ext"
+ $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+ break 2
+ fi
+done
+ done
+IFS=$as_save_IFS
+
+ ;;
+esac
+fi
+ac_pt_PKG_CONFIG=$ac_cv_path_ac_pt_PKG_CONFIG
+if test -n "$ac_pt_PKG_CONFIG"; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_pt_PKG_CONFIG" >&5
+$as_echo "$ac_pt_PKG_CONFIG" >&6; }
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+ if test "x$ac_pt_PKG_CONFIG" = x; then
+ PKG_CONFIG=""
+ else
+ case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+ PKG_CONFIG=$ac_pt_PKG_CONFIG
+ fi
+else
+ PKG_CONFIG="$ac_cv_path_PKG_CONFIG"
+fi
+
+fi
+if test -n "$PKG_CONFIG"; then
+ _pkg_min_version=0.9.0
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking pkg-config is at least version $_pkg_min_version" >&5
+$as_echo_n "checking pkg-config is at least version $_pkg_min_version... " >&6; }
+ if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+ else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+ PKG_CONFIG=""
+ fi
+fi
+ if test -n "$PKG_CONFIG"; then :
+
+
+pkg_failed=no
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for jansson" >&5
+$as_echo_n "checking for jansson... " >&6; }
+
+if test -n "$JANSSON_CFLAGS"; then
+ pkg_cv_JANSSON_CFLAGS="$JANSSON_CFLAGS"
+ elif test -n "$PKG_CONFIG"; then
+ if test -n "$PKG_CONFIG" && \
+ { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"jansson\""; } >&5
+ ($PKG_CONFIG --exists --print-errors "jansson") 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; then
+ pkg_cv_JANSSON_CFLAGS=`$PKG_CONFIG --cflags "jansson" 2>/dev/null`
+ test "x$?" != "x0" && pkg_failed=yes
+else
+ pkg_failed=yes
+fi
+ else
+ pkg_failed=untried
+fi
+if test -n "$JANSSON_LIBS"; then
+ pkg_cv_JANSSON_LIBS="$JANSSON_LIBS"
+ elif test -n "$PKG_CONFIG"; then
+ if test -n "$PKG_CONFIG" && \
+ { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"jansson\""; } >&5
+ ($PKG_CONFIG --exists --print-errors "jansson") 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; then
+ pkg_cv_JANSSON_LIBS=`$PKG_CONFIG --libs "jansson" 2>/dev/null`
+ test "x$?" != "x0" && pkg_failed=yes
+else
+ pkg_failed=yes
+fi
+ else
+ pkg_failed=untried
+fi
+
+if test $pkg_failed = no; then
+ pkg_save_LDFLAGS="$LDFLAGS"
+ LDFLAGS="$LDFLAGS $pkg_cv_JANSSON_LIBS"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+
+else
+ pkg_failed=yes
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+ LDFLAGS=$pkg_save_LDFLAGS
+fi
+
+
+
+if test $pkg_failed = yes; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
+ _pkg_short_errors_supported=yes
+else
+ _pkg_short_errors_supported=no
+fi
+ if test $_pkg_short_errors_supported = yes; then
+ JANSSON_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "jansson" 2>&1`
+ else
+ JANSSON_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "jansson" 2>&1`
+ fi
+ # Put the nasty error message in config.log where it belongs
+ echo "$JANSSON_PKG_ERRORS" >&5
+
+
+ as_fn_error $? "Cannot find jansson library" "$LINENO" 5
+
+elif test $pkg_failed = untried; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+ as_fn_error $? "Cannot find jansson library" "$LINENO" 5
+
+else
+ JANSSON_CFLAGS=$pkg_cv_JANSSON_CFLAGS
+ JANSSON_LIBS=$pkg_cv_JANSSON_LIBS
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+
+
+$as_echo "#define HAVE_JANSSON 1" >>confdefs.h
+
+
+
+
+fi
+
+else
+
+ as_fn_error $? "Cannot find pkg-config" "$LINENO" 5
+
+fi
+fi
+
# Set the 'development' global.
. $srcdir/../bfd/development.sh
diff --git a/ld/configure.ac b/ld/configure.ac
index 0112148..4331d6b 100644
--- a/ld/configure.ac
+++ b/ld/configure.ac
@@ -289,6 +289,32 @@ fi
AM_CONDITIONAL(ENABLE_LIBCTF, test "${enable_libctf}" = yes)
AC_SUBST(enable_libctf)
+# Used to validate --package-metadata= input. Disabled by default.
+AC_ARG_ENABLE([jansson],
+ [AS_HELP_STRING([--enable-jansson],
+ [enable jansson [default=no]])],
+ [enable_jansson=$enableval],
+ [enable_jansson="no"])
+
+if test "x$enable_jansson" != "xno"; then
+ PKG_PROG_PKG_CONFIG
+ AS_IF([test -n "$PKG_CONFIG"],
+ [
+ PKG_CHECK_MODULES(JANSSON, [jansson],
+ [
+ AC_DEFINE(HAVE_JANSSON, 1, [The jansson library is to be used])
+ AC_SUBST([JANSSON_CFLAGS])
+ AC_SUBST([JANSSON_LIBS])
+ ],
+ [
+ AC_MSG_ERROR([Cannot find jansson library])
+ ])
+ ],
+ [
+ AC_MSG_ERROR([Cannot find pkg-config])
+ ])
+fi
+
AM_BINUTILS_WARNINGS
AM_LC_MESSAGES
diff --git a/ld/emultempl/elf.em b/ld/emultempl/elf.em
index c027559..c52484f 100644
--- a/ld/emultempl/elf.em
+++ b/ld/emultempl/elf.em
@@ -572,6 +572,7 @@ enum elf_options
OPTION_EXCLUDE_LIBS,
OPTION_HASH_STYLE,
OPTION_BUILD_ID,
+ OPTION_PACKAGE_METADATA,
OPTION_AUDIT,
OPTION_COMPRESS_DEBUG
};
@@ -602,6 +603,7 @@ EOF
fi
fragment <<EOF
{"build-id", optional_argument, NULL, OPTION_BUILD_ID},
+ {"package-metadata", optional_argument, NULL, OPTION_PACKAGE_METADATA},
{"compress-debug-sections", required_argument, NULL, OPTION_COMPRESS_DEBUG},
EOF
if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then
@@ -650,6 +652,13 @@ gld${EMULATION_NAME}_handle_option (int optc)
ldelf_emit_note_gnu_build_id = xstrdup (optarg);
break;
+ case OPTION_PACKAGE_METADATA:
+ free ((char *) ldelf_emit_note_fdo_package_metadata);
+ ldelf_emit_note_fdo_package_metadata = NULL;
+ if (optarg != NULL && strlen(optarg) > 0)
+ ldelf_emit_note_fdo_package_metadata = xstrdup (optarg);
+ break;
+
case OPTION_COMPRESS_DEBUG:
if (strcasecmp (optarg, "none") == 0)
link_info.compress_debug = COMPRESS_DEBUG_NONE;
diff --git a/ld/ld.texi b/ld/ld.texi
index a2b162c..eabbec8 100644
--- a/ld/ld.texi
+++ b/ld/ld.texi
@@ -2935,6 +2935,18 @@ string identifying the original linked file does not change.
Passing @code{none} for @var{style} disables the setting from any
@code{--build-id} options earlier on the command line.
+
+@kindex --package-metadata=@var{JSON}
+@item --package-metadata=@var{JSON}
+Request the creation of a @code{.note.package} ELF note section. The
+contents of the note are in JSON format, as per the package metadata
+specification. For more information see:
+https://systemd.io/ELF_PACKAGE_METADATA/
+If the JSON argument is missing/empty then this will disable the
+creation of the metadata note, if one had been enabled by an earlier
+occurrence of the --package-metdata option.
+If the linker has been built with libjansson, then the JSON string
+will be validated.
@end table
@c man end
diff --git a/ld/ldelf.c b/ld/ldelf.c
index 4094640..bfa0d54 100644
--- a/ld/ldelf.c
+++ b/ld/ldelf.c
@@ -39,6 +39,9 @@
#include <glob.h>
#endif
#include "ldelf.h"
+#ifdef HAVE_JANSSON
+#include <jansson.h>
+#endif
struct dt_needed
{
@@ -49,6 +52,9 @@ struct dt_needed
/* Style of .note.gnu.build-id section. */
const char *ldelf_emit_note_gnu_build_id;
+/* Content of .note.package section. */
+const char *ldelf_emit_note_fdo_package_metadata;
+
/* These variables are required to pass information back and forth
between after_open and check_needed and stat_needed and vercheck. */
@@ -1249,7 +1255,8 @@ ldelf_after_open (int use_libpath, int native, int is_linux, int is_freebsd,
}
}
- if (ldelf_emit_note_gnu_build_id != NULL)
+ if (ldelf_emit_note_gnu_build_id != NULL
+ || ldelf_emit_note_fdo_package_metadata != NULL)
{
/* Find an ELF input. */
for (abfd = link_info.input_bfds;
@@ -1262,11 +1269,20 @@ ldelf_after_open (int use_libpath, int native, int is_linux, int is_freebsd,
/* PR 10555: If there are no ELF input files do not try to
create a .note.gnu-build-id section. */
if (abfd == NULL
- || !ldelf_setup_build_id (abfd))
+ || (ldelf_emit_note_gnu_build_id != NULL
+ && !ldelf_setup_build_id (abfd)))
{
free ((char *) ldelf_emit_note_gnu_build_id);
ldelf_emit_note_gnu_build_id = NULL;
}
+
+ if (abfd == NULL
+ || (ldelf_emit_note_fdo_package_metadata != NULL
+ && !ldelf_setup_package_metadata (abfd)))
+ {
+ free ((char *) ldelf_emit_note_fdo_package_metadata);
+ ldelf_emit_note_fdo_package_metadata = NULL;
+ }
}
get_elf_backend_data (link_info.output_bfd)->setup_gnu_properties (&link_info);
@@ -1501,6 +1517,121 @@ ldelf_setup_build_id (bfd *ibfd)
return false;
}
+static bool
+write_package_metadata (bfd *abfd)
+{
+ struct elf_obj_tdata *t = elf_tdata (abfd);
+ const char *json;
+ asection *asec;
+ Elf_Internal_Shdr *i_shdr;
+ unsigned char *contents, *json_bits;
+ bfd_size_type size;
+ file_ptr position;
+ Elf_External_Note *e_note;
+
+ json = t->o->package_metadata.json;
+ asec = t->o->package_metadata.sec;
+ if (bfd_is_abs_section (asec->output_section))
+ {
+ einfo (_("%P: warning: .note.package section discarded,"
+ " --package-metadata ignored\n"));
+ return true;
+ }
+ i_shdr = &elf_section_data (asec->output_section)->this_hdr;
+
+ if (i_shdr->contents == NULL)
+ {
+ if (asec->contents == NULL)
+ asec->contents = (unsigned char *) xmalloc (asec->size);
+ contents = asec->contents;
+ }
+ else
+ contents = i_shdr->contents + asec->output_offset;
+
+ e_note = (Elf_External_Note *) contents;
+ size = offsetof (Elf_External_Note, name[sizeof "FDO"]);
+ size = (size + 3) & -(bfd_size_type) 4;
+ json_bits = contents + size;
+ size = asec->size - size;
+
+ /* Clear the package metadata field. */
+ memset (json_bits, 0, size);
+
+ bfd_h_put_32 (abfd, sizeof "FDO", &e_note->namesz);
+ bfd_h_put_32 (abfd, size, &e_note->descsz);
+ bfd_h_put_32 (abfd, FDO_PACKAGING_METADATA, &e_note->type);
+ memcpy (e_note->name, "FDO", sizeof "FDO");
+ memcpy (json_bits, json, strlen(json));
+
+ position = i_shdr->sh_offset + asec->output_offset;
+ size = asec->size;
+ return (bfd_seek (abfd, position, SEEK_SET) == 0
+ && bfd_bwrite (contents, size, abfd) == size);
+}
+
+/* Make .note.package section.
+ https://systemd.io/ELF_PACKAGE_METADATA/ */
+
+bool
+ldelf_setup_package_metadata (bfd *ibfd)
+{
+ asection *s;
+ bfd_size_type size;
+ size_t json_length;
+ flagword flags;
+
+ /* If the option wasn't specified, silently return. */
+ if (!ldelf_emit_note_fdo_package_metadata)
+ return false;
+
+ /* The option was specified, but it's empty, log and return. */
+ json_length = strlen (ldelf_emit_note_fdo_package_metadata);
+ if (json_length == 0)
+ {
+ einfo (_("%P: warning: --package-metadata is empty, ignoring\n"));
+ return false;
+ }
+
+#ifdef HAVE_JANSSON
+ json_error_t json_error;
+ json_t *json = json_loads (ldelf_emit_note_fdo_package_metadata,
+ 0, &json_error);
+ if (!json)
+ {
+ einfo (_("%P: warning: --package-metadata=%s does not contain valid "
+ "JSON, ignoring: %s\n"),
+ ldelf_emit_note_fdo_package_metadata, json_error.text);
+ return false;
+ }
+ else
+ json_decref (json);
+#endif
+
+ size = offsetof (Elf_External_Note, name[sizeof "FDO"]);
+ size += json_length + 1;
+ size = (size + 3) & -(bfd_size_type) 4;
+
+ flags = (SEC_ALLOC | SEC_LOAD | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED | SEC_READONLY | SEC_DATA);
+ s = bfd_make_section_anyway_with_flags (ibfd, ".note.package",
+ flags);
+ if (s != NULL && bfd_set_section_alignment (s, 2))
+ {
+ struct elf_obj_tdata *t = elf_tdata (link_info.output_bfd);
+ t->o->package_metadata.after_write_object_contents
+ = &write_package_metadata;
+ t->o->package_metadata.json = ldelf_emit_note_fdo_package_metadata;
+ t->o->package_metadata.sec = s;
+ elf_section_type (s) = SHT_NOTE;
+ s->size = size;
+ return true;
+ }
+
+ einfo (_("%P: warning: cannot create .note.package section,"
+ " --package-metadata ignored\n"));
+ return false;
+}
+
/* Look through an expression for an assignment statement. */
static void
diff --git a/ld/ldelf.h b/ld/ldelf.h
index efa8b45..a3ded3d 100644
--- a/ld/ldelf.h
+++ b/ld/ldelf.h
@@ -19,6 +19,7 @@
MA 02110-1301, USA. */
extern const char *ldelf_emit_note_gnu_build_id;
+extern const char *ldelf_emit_note_fdo_package_metadata;
extern void ldelf_after_parse (void);
extern bool ldelf_load_symbols (lang_input_statement_type *);
@@ -26,6 +27,7 @@ extern void ldelf_before_plugin_all_symbols_read (int, int, int, int,
int, const char *);
extern void ldelf_after_open (int, int, int, int, int, const char *);
extern bool ldelf_setup_build_id (bfd *);
+extern bool ldelf_setup_package_metadata (bfd *);
extern void ldelf_append_to_separated_string (char **, char *);
extern void ldelf_before_allocation (char *, char *, const char *);
extern bool ldelf_open_dynamic_archive
diff --git a/ld/lexsup.c b/ld/lexsup.c
index 82c459a..9225f71 100644
--- a/ld/lexsup.c
+++ b/ld/lexsup.c
@@ -2144,6 +2144,8 @@ elf_static_list_options (FILE *file)
fprintf (file, _("\
--build-id[=STYLE] Generate build ID note\n"));
fprintf (file, _("\
+ --package-metadata[=JSON] Generate package metadata note\n"));
+ fprintf (file, _("\
--compress-debug-sections=[none|zlib|zlib-gnu|zlib-gabi]\n\
Compress DWARF debug sections using zlib\n"));
#ifdef DEFAULT_FLAG_COMPRESS_DEBUG
diff --git a/ld/testsuite/ld-bootstrap/bootstrap.exp b/ld/testsuite/ld-bootstrap/bootstrap.exp
index bc83db6..f6d38af 100644
--- a/ld/testsuite/ld-bootstrap/bootstrap.exp
+++ b/ld/testsuite/ld-bootstrap/bootstrap.exp
@@ -155,6 +155,12 @@ foreach flags $test_flags {
set extralibs "$extralibs -lz"
}
+ # Check if the system's jansson library is used. If so, the object files will
+ # be using symbols from it, so link to it.
+ if { [lindex [remote_exec build grep "-q \"HAVE_JANSSON 1\" config.h" ] 0] == 0 } then {
+ set extralibs "$extralibs -ljansson"
+ }
+
# Plugin support requires linking with libdl.
if { $plugins == "yes" } {
if { ![istarget "*-*-freebsd*"]} {
diff --git a/ld/testsuite/ld-elf/package-note.exp b/ld/testsuite/ld-elf/package-note.exp
new file mode 100644
index 0000000..c423909
--- /dev/null
+++ b/ld/testsuite/ld-elf/package-note.exp
@@ -0,0 +1,45 @@
+# Expect script for --package-note tests.
+# Copyright (C) 2022 Free Software Foundation, Inc.
+#
+# This file is part of the GNU Binutils.
+#
+# 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.
+#
+
+# Exclude non-ELF targets.
+
+if ![is_elf_format] {
+ return
+}
+
+if { !([istarget *-*-linux*]
+ || [istarget arm*-*-uclinuxfdpiceabi]
+ || [istarget *-*-nacl*]
+ || [istarget *-*-gnu*]) } then {
+ return
+}
+
+run_ld_link_tests [list \
+ [list \
+ "package-note.o" \
+ "--package-metadata='{\"foo\":\"bar\"}'" \
+ "" \
+ "" \
+ {start.s} \
+ {{readelf {--notes} package-note.rd}} \
+ "package-note.o" \
+ ] \
+]
diff --git a/ld/testsuite/ld-elf/package-note.rd b/ld/testsuite/ld-elf/package-note.rd
new file mode 100644
index 0000000..77ae473
--- /dev/null
+++ b/ld/testsuite/ld-elf/package-note.rd
@@ -0,0 +1,6 @@
+#...
+Displaying notes found in: \.note\.package
+\s+Owner\s+Data\s+size\s+Description
+\s+FDO\s+0x00000010\s+(Unknown note type:\s+\(0xcafe1a7e\)|FDO_PACKAGING_METADATA)
+\s+(description data:\s+.*|Packaging Metadata:\s+{"foo":"bar"})
+#pass
generated by cgit v1.1 at 2024-07-10 02:22:14 +0000