4e65501f13
The arm64 binutils only accepts 0 as an offset to the Load-Acquire Register instructions where llvm will acceps both 0 and 0x0. The thread switching code uses these with SCHED_ULE to block waiting for a lock to be released. As the offset of the data to be loaded is zero this is safe, however it is useful to keep the offset in the instruction to document what is being loaded. To work around this issue in binutils only generate the 0x prefix for non-zero values. Reported by: kan Sponsored by: DARPA, AFRL
73 lines
1.1 KiB
Bash
73 lines
1.1 KiB
Bash
#!/bin/sh
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# $FreeBSD$
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usage()
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{
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echo "usage: genassym [-o outfile] objfile"
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exit 1
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}
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work()
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{
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${NM:='nm'} ${NMFLAGS} "$1" | ${AWK:='awk'} '
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/ C .*sign$/ {
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sign = substr($1, length($1) - 3, 4)
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sub("^0*", "", sign)
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if (sign != "")
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sign = "-"
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}
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/ C .*w0$/ {
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w0 = substr($1, length($1) - 3, 4)
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}
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/ C .*w1$/ {
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w1 = substr($1, length($1) - 3, 4)
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}
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/ C .*w2$/ {
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w2 = substr($1, length($1) - 3, 4)
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}
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/ C .*w3$/ {
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w3 = substr($1, length($1) - 3, 4)
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w = w3 w2 w1 w0
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sub("^0*", "", w)
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if (w == "")
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w = "0"
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hex = ""
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if (w != "0")
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hex = "0x"
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sub("w3$", "", $3)
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# This still has minor problems representing INT_MIN, etc.
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# E.g.,
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# with 32-bit 2''s complement ints, this prints -0x80000000,
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# which has the wrong type (unsigned int).
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printf("#define\t%s\t%s%s%s\n", $3, sign, hex, w)
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} '
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}
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#
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#MAIN PROGGRAM
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#
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use_outfile="no"
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while getopts "o:" option
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do
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case "$option" in
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o) outfile="$OPTARG"
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use_outfile="yes";;
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*) usage;;
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esac
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done
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shift $(($OPTIND - 1))
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case $# in
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1) ;;
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*) usage;;
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esac
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if [ "$use_outfile" = "yes" ]
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then
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work $1 3>"$outfile" >&3 3>&-
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else
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work $1
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fi
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