gz/genhooks at master · n3rdswithgame/gz · GitHub

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#!/usr/bin/env sh

if [ -z "$AS" ];      then AS="mips64-gcc";           fi
if [ -z "$CC" ];      then CC="mips64-gcc";           fi
if [ -z "$NM" ];      then NM="mips64-nm";            fi
if [ -z "$READELF" ]; then READELF="mips64-readelf";  fi

elf="$1"
if [ -z "$elf" ]; then
  echo usage: \`genhooks \<elf-file\>\`
  exit
fi

z64def()
{
  printf "#include \"src/gz/z64.h\"\n$1" | $CC -E - $CPPFLAGS | tail -n 1 -
}

gzsym()
{
  echo "0x`$NM "$elf" | grep " $1\$" | sed -e "s/[0-9A-Fa-f]\{8\}\?\([0-9A-Fa-f]\{8\}\).*/\1/"`"
}

asmgsc()
{
  addr="$(printf "%d" "$1")"
  addr="$(expr "$addr" % 536870912 + 2164260864)" # addr = addr & 0x1FFFFFFF | 0x81000000
  tmpfile="$(mktemp)"
  echo ".set noreorder; .set noat; $2" | $AS -x assembler -c - -o "$tmpfile"
  $READELF -x .text "$tmpfile" | grep "0x[0-9A-Fa-f]\{8\}" | grep -o " [0-9A-Fa-f]\{8\}" |
  while read -r line; do
    printf "%08X %04X\n" "$addr" "0x`echo "$line" | sed -s "s/\(....\)..../\1/"`"
    addr="$(expr "$addr" + 2)"
    printf "%08X %04X\n" "$addr" "0x`echo "$line" | sed -s "s/....\(....\)/\1/"`"
    addr="$(expr "$addr" + 2)"
  done
  rm -f "$tmpfile"
}

asmgsc "$(z64def z64_main_hook_addr)"             "jal $(gzsym _start);"
asmgsc "$(z64def z64_entrance_offset_hook_addr)"  "jal $(gzsym entrance_offset_hook); nop;"
asmgsc "$(z64def z64_frame_update_call_addr)"     "jal $(gzsym update_hook); nop;"
asmgsc "$(z64def z64_frame_input_call_addr)"      "jal $(gzsym input_hook); nop;"
disp_hook="$(gzsym disp_hook)"
asmgsc "$(z64def z64_disp_swap_1_addr)"           "jal $disp_hook;"
asmgsc "$(z64def z64_disp_swap_2_addr)"           "jal $disp_hook;"
asmgsc "$(z64def z64_disp_swap_3_addr)"           "jal $disp_hook;"
asmgsc "$(z64def z64_disp_swap_4_addr)"           "jal $disp_hook;"