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174 lines
5.7 KiB
174 lines
5.7 KiB
2 years ago
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commit c6702789344043fa998923c8f32ed0bdb2edfa9c
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Author: Vincent Mihalkovic <vmihalko@redhat.com>
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Date: Tue Sep 29 12:34:39 2020 +0200
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ld.so: add an --argv0 option [BZ #16124]
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Conflicts:
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elf/Makefile
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(Missing test backports.)
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diff --git a/elf/Makefile b/elf/Makefile
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index 82b5b4a07495c805..837a070c267527e1 100644
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--- a/elf/Makefile
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+++ b/elf/Makefile
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@@ -198,7 +198,8 @@ tests += restest1 preloadtest loadfail multiload origtest resolvfail \
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tst-dlopenfail tst-dlopenfail-2 \
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tst-filterobj tst-filterobj-dlopen tst-auxobj tst-auxobj-dlopen \
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tst-audit14 tst-audit15 tst-audit16 \
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- tst-tls-ie tst-tls-ie-dlmopen
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+ tst-tls-ie tst-tls-ie-dlmopen \
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+ argv0test
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# reldep9
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tests-internal += loadtest unload unload2 circleload1 \
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neededtest neededtest2 neededtest3 neededtest4 \
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@@ -395,7 +396,7 @@ endif
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ifeq (yes,$(build-shared))
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ifeq ($(run-built-tests),yes)
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tests-special += $(objpfx)tst-pathopt.out $(objpfx)tst-rtld-load-self.out \
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- $(objpfx)tst-rtld-preload.out
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+ $(objpfx)tst-rtld-preload.out $(objpfx)argv0test.out
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endif
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tests-special += $(objpfx)check-textrel.out $(objpfx)check-execstack.out \
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$(objpfx)check-wx-segment.out \
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@@ -1716,3 +1717,10 @@ $(objpfx)tst-tls-ie-dlmopen.out: \
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$(objpfx)tst-tls-ie-mod6.so
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$(objpfx)tst-tls-surplus: $(libdl)
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+
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+$(objpfx)argv0test.out: tst-rtld-argv0.sh $(objpfx)ld.so \
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+ $(objpfx)argv0test
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+ $(SHELL) $< $(objpfx)ld.so $(objpfx)argv0test \
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+ '$(test-wrapper-env)' '$(run_program_env)' \
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+ '$(rpath-link)' 'test-argv0' > $@; \
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+ $(evaluate-test)
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diff --git a/elf/argv0test.c b/elf/argv0test.c
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new file mode 100644
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index 0000000000000000..c22ba5ea70ed7dbf
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--- /dev/null
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+++ b/elf/argv0test.c
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@@ -0,0 +1,31 @@
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+/* Test for --argv0 option ld.so.
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+
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+ Copyright (C) 2020 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <https://www.gnu.org/licenses/>. */
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+
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+#include <string.h>
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+#include <support/check.h>
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+
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+static int
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+do_test (int argc, char **argv)
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+{
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+ TEST_COMPARE_STRING (argv[0], "test-argv0");
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+ return 0;
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+}
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+
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+#define TEST_FUNCTION_ARGV do_test
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+#include <support/test-driver.c>
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diff --git a/elf/rtld.c b/elf/rtld.c
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index 67441ac6f252350e..4107a215abd554f4 100644
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--- a/elf/rtld.c
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+++ b/elf/rtld.c
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@@ -1196,6 +1196,8 @@ dl_main (const ElfW(Phdr) *phdr,
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installing it. */
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rtld_is_main = true;
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+ char *argv0 = NULL;
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+
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/* Note the place where the dynamic linker actually came from. */
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GL(dl_rtld_map).l_name = rtld_progname;
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@@ -1253,6 +1255,14 @@ dl_main (const ElfW(Phdr) *phdr,
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else if (! strcmp (_dl_argv[1], "--preload") && _dl_argc > 2)
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{
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preloadarg = _dl_argv[2];
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+ _dl_skip_args += 2;
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+ _dl_argc -= 2;
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+ _dl_argv += 2;
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+ }
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+ else if (! strcmp (_dl_argv[1], "--argv0") && _dl_argc > 2)
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+ {
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+ argv0 = _dl_argv[2];
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+
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_dl_skip_args += 2;
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_dl_argc -= 2;
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_dl_argv += 2;
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@@ -1286,7 +1296,8 @@ of this helper program; chances are you did not intend to run this program.\n\
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--inhibit-rpath LIST ignore RUNPATH and RPATH information in object names\n\
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in LIST\n\
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--audit LIST use objects named in LIST as auditors\n\
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- --preload LIST preload objects named in LIST\n");
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+ --preload LIST preload objects named in LIST\n\
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+ --argv0 STRING set argv[0] to STRING before running\n");
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++_dl_skip_args;
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--_dl_argc;
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@@ -1378,6 +1389,10 @@ of this helper program; chances are you did not intend to run this program.\n\
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break;
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}
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#endif
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+
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+ /* Set the argv[0] string now that we've processed the executable. */
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+ if (argv0 != NULL)
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+ _dl_argv[0] = argv0;
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}
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else
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{
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diff --git a/elf/tst-rtld-argv0.sh b/elf/tst-rtld-argv0.sh
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new file mode 100755
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index 0000000000000000..14d97fb375fc652b
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--- /dev/null
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+++ b/elf/tst-rtld-argv0.sh
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@@ -0,0 +1,37 @@
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+#!/bin/sh
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+# Test for --argv0 option ld.so.
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+# Copyright (C) 2020 Free Software Foundation, Inc.
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+# This file is part of the GNU C Library.
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+#
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+# The GNU C Library is free software; you can redistribute it and/or
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+# modify it under the terms of the GNU Lesser General Public
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+# License as published by the Free Software Foundation; either
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+# version 2.1 of the License, or (at your option) any later version.
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+#
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+# The GNU C Library is distributed in the hope that it will be useful,
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+# but WITHOUT ANY WARRANTY; without even the implied warranty of
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+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+# Lesser General Public License for more details.
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+#
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+# You should have received a copy of the GNU Lesser General Public
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+# License along with the GNU C Library; if not, see
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+# <https://www.gnu.org/licenses/>.
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+
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+set -e
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+
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+rtld=$1
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+test_program=$2
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+test_wrapper_env=$3
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+run_program_env=$4
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+library_path=$5
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+argv0=$6
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+
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+echo "# [${test_wrapper_env}] [${run_program_env}] [$rtld] [--library-path]" \
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+ "[$library_path] [--argv0] [$argv0] [$test_program]"
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+${test_wrapper_env} \
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+${run_program_env} \
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+$rtld --library-path "$library_path" \
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+ --argv0 "$argv0" $test_program 2>&1 && rc=0 || rc=$?
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+echo "# exit status $rc"
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+
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+exit $rc
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