Bug #354073: Patch 64-bit flash to fix memcpy issue with glibc-2.13

(Portage version: 2.1.9.34/cvs/Linux i686)

1 files changed, 40 insertions, 0 deletions

diff --git a/www-plugins/adobe-flash/files/memcpy-to-memmove.sh b/www-plugins/adobe-flash/files/memcpy-to-memmove.sh
new file mode 100644
index 000000000000..b1632e583484
--- /dev/null
+++ b/www-plugins/adobe-flash/files/memcpy-to-memmove.sh
@@ -0,0 +1,40 @@
+#!/bin/sh
+# Quick and dirty, but inefficient shellscript that
+# turns all memcpy calls into memmove calls
+# From Ray Strode
+
+set -e
+
+INPUT="$1"
+
+MEMCPY=0x$(objdump -S -j .plt $INPUT | grep memcpy |awk '{ print $1 }')
+[ $MEMCPY = "0x" ] && echo "Can't find memcpy call in $INPUT PLT" 1>&2 && exit 1
+
+MEMMOVE=0x$(objdump -S -j .plt $INPUT | grep memmove |awk '{ print $1 }')
+[ $MEMMOVE = "0x" ] && echo "Can't find memmove call in $INPUT PLT" 1>&2 && exit 2
+
+DELTA=$(($MEMMOVE - $MEMCPY))
+MEMCPY="$(printf '%x' $MEMCPY)"
+
+TEMP_OUTPUT="$(mktemp)"
+trap "rm -f $TEMP_OUTPUT" ERR
+
+cp $INPUT $TEMP_OUTPUT
+objdump -S -j .text $INPUT | while read offset e8 byte1 byte2 byte3 byte4 call call_offset rest; do
+    test "$call_offset" = "$MEMCPY" || continue;
+
+    OFFSET=$(printf "0x%x" $((0x${offset%:} + 1)))
+    NUMBER="0x${byte4}${byte3}${byte2}${byte1}"
+    echo -n "Changing call at offset $OFFSET from [${byte1} ${byte2} ${byte3} ${byte4}]"
+    NUMBER=$(printf "0x%08x" $(($NUMBER + $DELTA)))
+
+    BYTE1=$(printf "%02x" $((($NUMBER >> 24) & 0xff)))
+    BYTE2=$(printf "%02x" $((($NUMBER >> 16) & 0xff)))
+    BYTE3=$(printf "%02x" $((($NUMBER >>  8) & 0xff)))
+    BYTE4=$(printf "%02x" $((($NUMBER >>  0) & 0xff)))
+
+    echo " to [${BYTE4} ${BYTE3} ${BYTE2} ${BYTE1}]"
+    echo -ne "\x$BYTE4\x$BYTE3\x$BYTE2\x$BYTE1" | dd of=$TEMP_OUTPUT bs=1 seek=$(($OFFSET)) count=4 conv=notrunc 2> /dev/null
+done
+
+mv $TEMP_OUTPUT $INPUT