projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| d69911a6 KC |
1 | #!/bin/sh |
| 2 | # | |
| 3 | # Calculate the amount of space needed to run the kernel, including room for | |
| 4 | # the .bss and .brk sections. | |
| 5 | # | |
| 6 | # Usage: | |
| 7 | # objdump -h a.out | sh calc_run_size.sh | |
| 8 | ||
| 9 | NUM='\([0-9a-fA-F]*[ \t]*\)' | |
| 10 | OUT=$(sed -n 's/^[ \t0-9]*.b[sr][sk][ \t]*'"$NUM$NUM$NUM$NUM"'.*/\1\4/p') | |
| 11 | if [ -z "$OUT" ] ; then | |
| 12 | echo "Never found .bss or .brk file offset" >&2 | |
| 13 | exit 1 | |
| 14 | fi | |
| 15 | ||
| 16 | OUT=$(echo ${OUT# }) | |
| 17 | sizeA=$(printf "%d" 0x${OUT%% *}) | |
| 18 | OUT=${OUT#* } | |
| 19 | offsetA=$(printf "%d" 0x${OUT%% *}) | |
| 20 | OUT=${OUT#* } | |
| 21 | sizeB=$(printf "%d" 0x${OUT%% *}) | |
| 22 | OUT=${OUT#* } | |
| 23 | offsetB=$(printf "%d" 0x${OUT%% *}) | |
| 24 | ||
| 25 | run_size=$(( $offsetA + $sizeA + $sizeB )) | |
| 26 | ||
| 27 | # BFD linker shows the same file offset in ELF. | |
| 28 | if [ "$offsetA" -ne "$offsetB" ] ; then | |
| 29 | # Gold linker shows them as consecutive. | |
| 30 | endB=$(( $offsetB + $sizeB )) | |
| 31 | if [ "$endB" != "$run_size" ] ; then | |
| 32 | printf "sizeA: 0x%x\n" $sizeA >&2 | |
| 33 | printf "offsetA: 0x%x\n" $offsetA >&2 | |
| 34 | printf "sizeB: 0x%x\n" $sizeB >&2 | |
| 35 | printf "offsetB: 0x%x\n" $offsetB >&2 | |
| 36 | echo ".bss and .brk are non-contiguous" >&2 | |
| 37 | exit 1 | |
| 38 | fi | |
| 39 | fi | |
| 40 | ||
| 41 | printf "%d\n" $run_size | |
| 42 | exit 0 |