mirror of
https://sourceware.org/git/glibc.git
synced 2024-09-21 17:04:05 +00:00
b48a267b8f
SSE registers are used for passing parameters and must be preserved in runtime relocations. This is inside ld.so enforced through the tests in tst-xmmymm.sh. But the malloc routines used after startup come from libc.so and can be arbitrarily complex. It's overkill to save the SSE registers all the time because of that. These calls are rare. Instead we save them on demand. The new infrastructure put in place in this patch makes this possible and efficient.
81 lines
1.9 KiB
Bash
Executable File
81 lines
1.9 KiB
Bash
Executable File
#! /bin/bash
|
|
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
|