Venturing out of my usual VC++ realm into the world of GCC (via MINGW32). Trying to create a Windows PE that consists largely of NOPs, ala:
for(i = 0; i < 1000; i++)
{
asm("nop");
}
But either I'm using the wrong syntax or the compiler is optimising through them because those NOPs don't survive the compilation process.
I'm using the -O0 flag, otherwise defaults. Any ideas on how I can coax the compiler into leaving the NOPs intact?
Answer
A convenient way to get 1000 inline nops is to use the .rept directive of the GNU assembler:
void thousand_nops(void) {
asm(".rept 1000 ; nop ; .endr");
}