minix/commands/unstack/unstack.sh
2013-01-04 16:17:07 +00:00

74 lines
1.4 KiB
Bash

#!/bin/sh
# Look at /usr/pkg/bin first in case there is an old nm in /usr/bin
PATH=/usr/pkg/bin:$PATH:/usr/gnu/bin
# Does procfs give us some extra 'symbols'?
IPCVECS=/proc/ipcvecs
if [ -f $IPCVECS ]
then EXTRANM="cat $IPCVECS"
fi
# Check usage
if [ $# -lt 1 ]
then echo "Usage: unstack <executable> [0x... [0x... ] ]"
exit 1
fi
# Check invocation mode
case "`basename $0`" in
datasizes)
echo "datasizes is obsolete; please use nm --size-sort instead."
exit 1
;;
unstack)
mode=stack
;;
*)
echo "Invoked as $0?"
exit 1
;;
esac
# Get executable name
executable=$1
shift
if ! which gawk >/dev/null 2>&1
then echo "Please install gawk."
exit 1
fi
# Invoke binutils nm or ack nm?
if file $executable | grep ELF >/dev/null 2>&1
then NM="nm"
else NM="acknm"
fi
SYMLIST=/tmp/unstack.$$
# store sorted, filtered nm output once
(
$NM $executable | sed 's/^/0x/'
$EXTRANM | sed 's/^/0x/'
# Add shared libraries
ldd -f"%p %x\n" $executable 2>/dev/null | while read lib addr
do echo >&2 "Adding $lib at $addr"
nm -n $lib | sed 's/^/0x/' | grep ' [Tt] ' | \
gawk -v liboffset=$addr -v libname=$lib --non-decimal-data '{ printf "0x%lx %s %s[%s]\n", $1+liboffset, $2, $3, libname }'
done
) | sort -x | grep ' [Tt] [^.]' >$SYMLIST
while [ $# -gt 0 ]
do gawk <$SYMLIST --non-decimal-data -v symoffset=$1 '
{ if($1 > symoffset) { printf "%s+0x%x\n", name, symoffset-prevoffset; exit }
name=$3; prevoffset=$1;
}'
shift
done
rm -f $SYMLIST
exit 1