+2020-11-20 Nick Clifton <nickc@redhat.com>
+
+ PR 22967
+ * nm.c (ifunc_type_chars): New variable.
+ (long_options): Add --ifunc-chars.
+ (print_symbol): Use ifunc_type_chars for ifunc symbols.
+ (main): Handle the new option.
+ * doc/binutils.texi: Document the new option.
+ * configure.ac: Add --enable-f-for-ifunc-symbols option which
+ changes the default symbol displayed by nm.
+ * NEWS: Mention the new feature.
+ * testsuite/binutils-all/nm.exp: Test the new feature.
+ * config.in: Regenerate.
+ * configure: Regenerate.
+
2020-11-20 Linda Zhang <lindasc@qq.com>
PR 20979
-*- text -*-
+* Nm has a new command line option: --ifunc-chars=CHARS. This specifies a
+ string of one or two characters. The first character is used as the type
+ character when displaying global ifunc symbols. The second character, if
+ present is used when displaying local ifunc symbols.
+
+ In addition a new configure time option --enable-f-for-ifunc-symbols has been
+ created, which if used will change nm's default characters for ifunc symbols
+ from i (both local and global) to F (global) and f (local).
+
* The ar tool's previously unused l modifier is now used for specifying
dependencies of a static library. The arguments of this option
(or --record-libdeps long form option) will be stored verbatim in the
/* Should ar and ranlib use -D behavior by default? */
#undef DEFAULT_AR_DETERMINISTIC
+/* Have nm use F and f for global and local ifunc symbols */
+#undef DEFAULT_F_FOR_IFUNC_SYMBOLS
+
/* Should strings use -a behavior by default? */
#undef DEFAULT_STRINGS_ALL
enable_targets
enable_deterministic_archives
enable_default_strings_all
+enable_f_for_ifunc_symbols
with_debuginfod
enable_libctf
enable_werror
ar and ranlib default to -D behavior
--disable-default-strings-all
strings defaults to --data behavior
+ --enable-f-for-ifunc-symbols
+ Have nm use F and f for global and local ifunc
+ symbols
--enable-libctf Handle .ctf type-info sections [default=yes]
--enable-werror treat compile warnings as errors
--enable-build-warnings enable build-time compiler warnings
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 11555 "configure"
+#line 11559 "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 11661 "configure"
+#line 11665 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
esac
fi
+
# Check whether --enable-deterministic-archives was given.
if test "${enable_deterministic_archives+set}" = set; then :
enableval=$enable_deterministic_archives;
_ACEOF
+
# Check whether --enable-default-strings-all was given.
if test "${enable_default_strings_all+set}" = set; then :
enableval=$enable_default_strings_all;
+cat >>confdefs.h <<_ACEOF
+#define DEFAULT_STRINGS_ALL $default_strings_all
+_ACEOF
+
+
+
+# Check whether --enable-f-for-ifunc-symbols was given.
+if test "${enable_f_for_ifunc_symbols+set}" = set; then :
+ enableval=$enable_f_for_ifunc_symbols;
+if test "${enableval}" = no; then
+ default_f_for_ifunc=0
+else
+ default_f_for_ifunc=1
+fi
+else
+ default_f_for_ifunc=0
+fi
+
+
+
+cat >>confdefs.h <<_ACEOF
+#define DEFAULT_F_FOR_IFUNC_SYMBOLS $default_f_for_ifunc
+_ACEOF
+
+
+
fi
-
-cat >>confdefs.h <<_ACEOF
-#define DEFAULT_STRINGS_ALL $default_strings_all
-_ACEOF
-
-
# Check whether --enable-libctf was given.
if test "${enable_libctf+set}" = set; then :
enableval=$enable_libctf;
*) enable_targets=$enableval ;;
esac])dnl
+
AC_ARG_ENABLE(deterministic-archives,
[AS_HELP_STRING([--enable-deterministic-archives],
[ar and ranlib default to -D behavior])], [
AC_DEFINE_UNQUOTED(DEFAULT_AR_DETERMINISTIC, $default_ar_deterministic,
[Should ar and ranlib use -D behavior by default?])
+
AC_ARG_ENABLE(default-strings-all,
[AS_HELP_STRING([--disable-default-strings-all],
[strings defaults to --data behavior])], [
default_strings_all=1
fi], [default_strings_all=1])
-AC_DEBUGINFOD
-
AC_DEFINE_UNQUOTED(DEFAULT_STRINGS_ALL, $default_strings_all,
[Should strings use -a behavior by default?])
+
+AC_ARG_ENABLE(f-for-ifunc-symbols,
+[AS_HELP_STRING([--enable-f-for-ifunc-symbols],
+ [Have nm use F and f for global and local ifunc symbols])], [
+if test "${enableval}" = no; then
+ default_f_for_ifunc=0
+else
+ default_f_for_ifunc=1
+fi], [default_f_for_ifunc=0])
+
+AC_DEFINE_UNQUOTED(DEFAULT_F_FOR_IFUNC_SYMBOLS, $default_f_for_ifunc,
+ [Have nm use F and f for global and local ifunc symbols])
+
+AC_DEBUGINFOD
+
GCC_ENABLE([libctf], [yes], [], [Handle .ctf type-info sections])
if test "${enable_libctf}" = yes; then
AC_DEFINE(ENABLE_LIBCTF, 1, [Handle .ctf type-info sections])
[@option{-B}|@option{--format=bsd}] [@option{-C}|@option{--demangle}[=@var{style}]]
[@option{-D}|@option{--dynamic}] [@option{-f}@var{format}|@option{--format=}@var{format}]
[@option{-g}|@option{--extern-only}] [@option{-h}|@option{--help}]
+ [@option{--ifunc-chars=@var{CHARS}}]
[@option{-l}|@option{--line-numbers}] [@option{--inlines}]
[@option{-n}|@option{-v}|@option{--numeric-sort}]
[@option{-P}|@option{--portability}] [@option{-p}|@option{--no-sort}]
@item i
For PE format files this indicates that the symbol is in a section
-specific to the implementation of DLLs. For ELF format files this
-indicates that the symbol is an indirect function. This is a GNU
-extension to the standard set of ELF symbol types. It indicates a
-symbol which if referenced by a relocation does not evaluate to its
-address, but instead must be invoked at runtime. The runtime
-execution will then return the value to be used in the relocation.
+specific to the implementation of DLLs.
+
+For ELF format files this indicates that the symbol is an indirect
+function. This is a GNU extension to the standard set of ELF symbol
+types. It indicates a symbol which if referenced by a relocation does
+not evaluate to its address, but instead must be invoked at runtime.
+The runtime execution will then return the value to be used in the
+relocation.
+
+Note - the actual symbols display for GNU indirect symbols is
+controlled by the @option{--ifunc-chars} command line option. If this
+option has been provided then the first character in the string will
+be used for global indirect function symbols. If the string contains
+a second character then that will be used for local indirect function
+symbols.
@item I
The symbol is an indirect reference to another symbol.
@itemx --help
Show a summary of the options to @command{nm} and exit.
+@item --ifunc-chars=@var{CHARS}
+When display GNU indirect function symbols @command{nm} will default
+to using the @code{i} character for both local indirect functions and
+global indirect functions. The @option{--ifunc-chars} option allows
+the user to specify a string containing one or two characters. The
+first character will be used for global indirect function symbols and
+the second character, if present, will be used for local indirect
+function symbols.
+
@item -l
@itemx --line-numbers
@cindex symbol line numbers
static int line_numbers = 0; /* Print line numbers for symbols. */
static int allow_special_symbols = 0; /* Allow special symbols. */
+/* The characters to use for global and local ifunc symbols. */
+#if DEFAULT_F_FOR_IFUNC_SYMBOLS
+static const char * ifunc_type_chars = "Ff";
+#else
+static const char * ifunc_type_chars = NULL;
+#endif
+
static int demangle_flags = DMGL_ANSI | DMGL_PARAMS;
/* When to print the names of files. Not mutually exclusive in SYSV format. */
OPTION_SIZE_SORT,
OPTION_RECURSE_LIMIT,
OPTION_NO_RECURSE_LIMIT,
+ OPTION_IFUNC_CHARS,
OPTION_WITH_SYMBOL_VERSIONS
};
{"extern-only", no_argument, &external_only, 1},
{"format", required_argument, 0, 'f'},
{"help", no_argument, 0, 'h'},
+ {"ifunc-chars", required_argument, 0, OPTION_IFUNC_CHARS},
{"line-numbers", no_argument, 0, 'l'},
{"no-cplus", no_argument, &do_demangle, 0}, /* Linux compatibility. */
{"no-demangle", no_argument, &do_demangle, 0},
-f, --format=FORMAT Use the output format FORMAT. FORMAT can be `bsd',\n\
`sysv' or `posix'. The default is `bsd'\n\
-g, --extern-only Display only external symbols\n\
+ --ifunc-chars=CHARS Characters to use when displaying ifunc symbols\n\
-l, --line-numbers Use debugging information to find a filename and\n\
line number for each symbol\n\
-n, --numeric-sort Sort symbols numerically by address\n\
bfd_get_symbol_info (abfd, sym, &syminfo);
+ /* PR 22967 - Distinguish between local and global ifunc symbols. */
+ if (syminfo.type == 'i'
+ && sym->flags & BSF_GNU_INDIRECT_FUNCTION)
+ {
+ if (ifunc_type_chars == NULL || ifunc_type_chars[0] == 0)
+ ; /* Change nothing. */
+ else if (sym->flags & BSF_GLOBAL)
+ syminfo.type = ifunc_type_chars[0];
+ else if (ifunc_type_chars[1] != 0)
+ syminfo.type = ifunc_type_chars[1];
+ }
+
info.sinfo = &syminfo;
info.ssize = ssize;
/* Synthetic symbols do not have a full symbol type set of data available.
#endif
break;
+ case OPTION_IFUNC_CHARS:
+ ifunc_type_chars = optarg;
+ break;
+
case 0: /* A long option that just sets a flag. */
break;
remote_file host delete $tmpfile
}
}
+
+ # PR 22967
+ # Test nm --ifunc-chars on a indirect symbols.
+
+ # The following targets are known to not support ifuncs.
+ setup_xfail "alpha*-*-*"
+ setup_xfail "arm*-*-nto*"
+ setup_xfail "arm*-*-netbsdelf*"
+ setup_xfail "mips*-*-*"
+ setup_xfail "msp430*-*-*"
+ setup_xfail "tx39*-*-*"
+ setup_xfail "visium*-*-*"
+
+ set testname "nm --ifunc-chars"
+ if {![binutils_assemble $srcdir/$subdir/ifunc.s tmpdir/ifunc.o]} then {
+ fail "$testname (assembly)"
+ } else {
+ if [is_remote host] {
+ set tmpfile [remote_download host tmpdir/ifunc.o]
+ } else {
+ set tmpfile tmpdir/ifunc.o
+ }
+
+ set got [binutils_run $NM "$NMFLAGS --ifunc-chars=Ff $tmpfile"]
+
+ if [regexp "F global_foo" $got] then {
+ pass "$testname (global ifunc)"
+ } else {
+ fail "$testname (global ifunc)"
+ }
+
+ if [regexp "f local_foo" $got] then {
+ pass "$testname (local ifunc)"
+ } else {
+ fail "$testname (local ifunc)"
+ }
+
+ if { $verbose < 1 } {
+ remote_file host delete "tmpdir/ifunc.o"
+ }
+ }
+
+
}
# There are certainly other tests that could be run.
projects / binutils-gdb.git / commitdiff