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authorH.J. Lu <hjl.tools@gmail.com>2012-11-02 01:15:07 -0700
committerH.J. Lu <hjl.tools@gmail.com>2012-11-07 13:50:08 -0800
commiteb48db7e890b23057d8684ab85460a08ea540785 (patch)
tree71d4fffd3dd4a4fc3f59cca5b289b75b403638b9 /sysdeps/x86
parentc4b6cf53d5478d0948f0c4426256123dbdf49264 (diff)
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Also run tst-xmmymm.sh on i386 ld.so
Diffstat (limited to 'sysdeps/x86')
-rw-r--r--sysdeps/x86/Makefile5
-rwxr-xr-xsysdeps/x86/tst-xmmymm.sh100
2 files changed, 105 insertions, 0 deletions
diff --git a/sysdeps/x86/Makefile b/sysdeps/x86/Makefile
index f25d1e2415..086054ff09 100644
--- a/sysdeps/x86/Makefile
+++ b/sysdeps/x86/Makefile
@@ -1,4 +1,9 @@
ifeq ($(subdir),elf)
CFLAGS-.os += $(if $(filter $(@F),$(patsubst %,%.os,$(all-rtld-routines))),\
-mno-sse -mno-mmx)
+
+tests: $(objpfx)tst-xmmymm.out
+$(objpfx)tst-xmmymm.out: ../sysdeps/x86/tst-xmmymm.sh $(objpfx)ld.so
+ @echo "Checking ld.so for SSE register use. This will take a few seconds..."
+ $(SHELL) $< $(objpfx) > $@
endif
diff --git a/sysdeps/x86/tst-xmmymm.sh b/sysdeps/x86/tst-xmmymm.sh
new file mode 100755
index 0000000000..64efc6e021
--- /dev/null
+++ b/sysdeps/x86/tst-xmmymm.sh
@@ -0,0 +1,100 @@
+#! /bin/bash
+# Make sure no code in ld.so uses xmm/ymm registers on x86-64.
+# Copyright (C) 2009-2012 Free Software Foundation, Inc.
+# This file is part of the GNU C Library.
+
+# The GNU C Library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+
+# The GNU C Library 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
+# Lesser General Public License for more details.
+
+# You should have received a copy of the GNU Lesser General Public
+# License along with the GNU C Library; if not, see
+# <http://www.gnu.org/licenses/>.
+
+set -e
+
+objpfx="$1"
+
+tmp=$(mktemp ${objpfx}tst-xmmymm.XXXXXX)
+trap 'rm -f "$tmp"' 1 2 3 15
+
+# List of object files we have to test
+rtldobjs=$(readelf -W -wi ${objpfx}dl-allobjs.os |
+ awk '/^ </ { if ($5 == "(DW_TAG_compile_unit)") c=1; else c=0 } $2 == "DW_AT_name" { if (c == 1) print $NF }' |
+ sed 's,\(.*/\|\)\([_[:alnum:]-]*[.]\).$,\2os,')
+rtldobjs="$rtldobjs $(ar t ${objpfx}rtld-libc.a)"
+
+# OBJECT symbols can be ignored.
+readelf -sW ${objpfx}dl-allobjs.os ${objpfx}rtld-libc.a |
+egrep " OBJECT *GLOBAL " |
+awk '{if ($7 != "ABS") print $8 }' |
+sort -u > "$tmp"
+declare -a objects
+objects=($(cat "$tmp"))
+
+objs="dl-runtime.os"
+tocheck="dl-runtime.os"
+
+while test -n "$objs"; do
+ this="$objs"
+ objs=""
+
+ for f in $this; do
+ undef=$(nm -u "$objpfx"../*/"$f" | awk '{print $2}')
+ if test -n "$undef"; then
+ for s in $undef; do
+ for obj in ${objects[*]} "_GLOBAL_OFFSET_TABLE_"; do
+ if test "$obj" = "$s"; then
+ continue 2
+ fi
+ done
+ for o in $rtldobjs; do
+ ro=$(echo "$objpfx"../*/"$o")
+ if nm -g --defined-only "$ro" | egrep -qs " $s\$"; then
+ if ! (echo "$tocheck $objs" | fgrep -qs "$o"); then
+ echo "$o needed for $s"
+ objs="$objs $o"
+ fi
+ break;
+ fi
+ done
+ done
+ fi
+ done
+ tocheck="$tocheck$objs"
+done
+
+echo
+echo
+echo "object files needed: $tocheck"
+
+cp /dev/null "$tmp"
+for f in $tocheck; do
+ objdump -d "$objpfx"../*/"$f" |
+ awk 'BEGIN { last="" } /^[[:xdigit:]]* <[_[:alnum:]]*>:$/ { fct=substr($2, 2, length($2)-3) } /,%[xy]mm[[:digit:]]*$/ { if (last != fct) { print fct; last=fct} }' |
+ while read fct; do
+ if test "$fct" = "_dl_runtime_profile" -o "$fct" = "_dl_x86_64_restore_sse"; then
+ continue;
+ fi
+ echo "function $fct in $f modifies xmm/ymm" >> "$tmp"
+ result=1
+ done
+done
+
+if test -s "$tmp"; then
+ echo
+ echo
+ cat "$tmp"
+ result=1
+else
+ result=0
+fi
+
+rm "$tmp"
+exit $result