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5379aebddd
2d63a517e4 added support to save and
restore zmm register in the dynamic linker, but did not enhance
test-xmmymm.sh to detect accidental usage of these registers. The
patch below adds that check.
The script has also been renamed to tst-ld-sse-use.sh. To see the
minimal changes, run `git show -M`.
[BZ #16194]
* sysdeps/x86/tst-xmmymm.sh: Rename file to...
* sysdeps/x86/tst-ld-sse-use.sh: ... this. Check for zmm
register usage.
* sysdeps/x86/Makefile: Adjust.
104 lines
2.7 KiB
Bash
Executable File
104 lines
2.7 KiB
Bash
Executable File
#! /bin/bash
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# Make sure no code in ld.so uses xmm/ymm/zmm registers on x86-64.
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# Copyright (C) 2009-2014 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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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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# 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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# 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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# <http://www.gnu.org/licenses/>.
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set -e
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objpfx="$1"
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NM="$2"
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OBJDUMP="$3"
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READELF="$4"
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tmp=$(mktemp ${objpfx}tst-ld-sse-use.XXXXXX)
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trap 'rm -f "$tmp"' 1 2 3 15
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# List of object files we have to test
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rtldobjs=$($READELF -W -wi ${objpfx}dl-allobjs.os |
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awk '/^ </ { if ($5 == "(DW_TAG_compile_unit)") c=1; else c=0 } $2 == "DW_AT_name" { if (c == 1) print $NF }' |
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sed 's,\(.*/\|\)\([_[:alnum:]-]*[.]\).$,\2os,')
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rtldobjs="$rtldobjs $(ar t ${objpfx}rtld-libc.a)"
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# OBJECT symbols can be ignored.
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$READELF -sW ${objpfx}dl-allobjs.os ${objpfx}rtld-libc.a |
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egrep " OBJECT *GLOBAL " |
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awk '{if ($7 != "ABS") print $8 }' |
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sort -u > "$tmp"
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declare -a objects
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objects=($(cat "$tmp"))
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objs="dl-runtime.os"
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tocheck="dl-runtime.os"
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while test -n "$objs"; do
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this="$objs"
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objs=""
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for f in $this; do
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undef=$($NM -u "$objpfx"../*/"$f" | awk '{print $2}')
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if test -n "$undef"; then
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for s in $undef; do
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for obj in ${objects[*]} "_GLOBAL_OFFSET_TABLE_"; do
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if test "$obj" = "$s"; then
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continue 2
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fi
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done
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for o in $rtldobjs; do
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ro=$(echo "$objpfx"../*/"$o")
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if $NM -g --defined-only "$ro" | egrep -qs " $s\$"; then
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if ! (echo "$tocheck $objs" | fgrep -qs "$o"); then
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echo "$o needed for $s"
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objs="$objs $o"
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fi
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break;
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fi
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done
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done
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fi
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done
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tocheck="$tocheck$objs"
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done
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echo
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echo
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echo "object files needed: $tocheck"
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cp /dev/null "$tmp"
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for f in $tocheck; do
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$OBJDUMP -d "$objpfx"../*/"$f" |
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awk 'BEGIN { last="" } /^[[:xdigit:]]* <[_[:alnum:]]*>:$/ { fct=substr($2, 2, length($2)-3) } /,%[xyz]mm[[:digit:]]*$/ { if (last != fct) { print fct; last=fct} }' |
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while read fct; do
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if test "$fct" = "_dl_runtime_profile" -o "$fct" = "_dl_x86_64_restore_sse"; then
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continue;
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fi
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echo "function $fct in $f modifies xmm/ymm/zmm" >> "$tmp"
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result=1
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done
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done
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if test -s "$tmp"; then
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echo
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echo
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cat "$tmp"
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result=1
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else
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result=0
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fi
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rm "$tmp"
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exit $result
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