trampoline.sh

   1 #!/bin/bash
   2
   3 set -e
   4
   5 hpp=$1
   6 object=$2
   7 name=$3
   8 sed=$4
   9 lipo=$5
  10 nm=$6
  11 otool=$7
  12
  13 exec >"${hpp}"
  14
  15 detailed=$("${lipo}" -detailed_info "${object}")
  16
  17 regex=$'\nNon-fat file: .* is architecture: (.*)'
  18 if [[ ${detailed} =~ ${regex} ]]; then
  19     archs=(${BASH_REMATCH[1]})
  20     unset detailed
  21 else
  22     archs=($(echo "${detailed}" | "${sed}" -e '/^architecture / { s/^architecture //; p; }; d;'))
  23 fi
  24
  25 echo '#include "Trampoline.hpp"'
  26
  27 for arch in "${archs[@]}"; do
  28     if [[ "${detailed+@}" ]]; then
  29         offset=$(echo "${detailed}" | "${sed}" -e '
  30             /^architecture / { x; s/.*/0/; x; };
  31             /^architecture '${arch}'$/ { x; s/.*/1/; x; };
  32             x; /^1$/ { x; /^ *offset / { s/^ *offset //; p; }; x; }; x;
  33             d;
  34         ')
  35     else
  36         offset=0
  37     fi
  38
  39     file=($("${otool}" -arch "${arch}" -l "${object}" | "${sed}" -e '
  40         x; /^1$/ { x;
  41             /^ *fileoff / { s/^.* //; p; };
  42             /^ *filesize / { s/^.* //; p; };
  43         x; }; x;
  44
  45         /^ *cmd LC_SEGMENT/ { x; s/.*/1/; x; };
  46
  47         d;
  48     '))
  49
  50     fileoff=${file[0]}
  51     filesize=${file[1]}
  52
  53     echo
  54     echo "static const char ${name}_${arch}_data_[] = {"
  55
  56     od -v -t x1 -t c -j "$((offset + fileoff))" -N "${filesize}" "${object}" | "${sed}" -e '
  57         /^[0-7]/ ! {
  58             s@^        @//  @;
  59             s/\(....\)/ \1/g;
  60             s@^ // @//@;
  61             s/ *$/,/;
  62         };
  63
  64         /^[0-7]/ {
  65             s/^[^ ]*//;
  66             s/  */ /g;
  67             s/^ *//;
  68             s/ $//;
  69             s/ /,/g;
  70             s/\([^,][^,]\)/0x\1/g;
  71             s/$/,/;
  72             /^,$/ ! { s/^/    /g; p; }; d;
  73         };
  74     '
  75
  76     echo "};"
  77
  78     echo
  79     entry=$("${nm}" -arch "${arch}" "${object}" | "${sed}" -e '/ _Start$/ { s/ .*//; p; }; d;')
  80     entry=${entry##*(0)}
  81     echo "static size_t ${name}_${arch}_entry_ = 0x${entry:=0};"
  82
  83     echo
  84     echo "/*"
  85     "${otool}" -arch "${arch}" -vVt "${object}"
  86     echo "*/"
  87
  88     echo
  89     echo "static Trampoline ${name}_${arch}_ = {"
  90     echo "    ${name}_${arch}_data_,"
  91     echo "    sizeof(${name}_${arch}_data_),"
  92     echo "    ${name}_${arch}_entry_,"
  93     echo "};"
  94
  95 done