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#!/usr/bin/env nickle
autoimport Process;
int byteflip(int x) {
return ((x >> 24) & 0xff) | ((x >> 8) & 0xff00) | ((x << 8) & 0xff0000) | ((x << 24) & 0xff000000);
}
void main () {
file input = popen(popen_direction.read, true, "objdump",
"objdump", "-j", ".text",
"--start-address=0",
"--stop-address=0x20",
"-s", argv[1]);
int sum = 0;
void add_in(int addr, int value) {
if (addr < 0x1c) {
sum += value;
} else if (addr == 0x1c) {
printf ("-DCKSUM=0x%08x\n", -sum & 0xffffffff);
exit(0);
}
}
while (!File::end(input)) {
string line = File::fgets(input);
string[] words = String::wordsplit(line, " ");
if (dim(words) < 5)
continue;
if (words[0] == "0000" || words[0] == "0010") {
int addr = string_to_integer(words[0], 16);
for (int i = 0; i < 4; i++)
add_in(addr + i * 4, byteflip(string_to_integer(words[i+1], 16)));
}
}
}
main();
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