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echo "datasizes is obsolete; please use nm --size-sort instead."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