libmwemu 0.24.5

x86 32/64bits and system internals emulator, for securely emulating malware and other stuff.
Documentation 
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use crate::emu;
use crate::windows::structures;

pub fn VirtualQueryEx(emu: &mut emu::Emu) {
    let hndl = emu
        .maps
        .read_dword(emu.regs().get_esp())
        .expect("kernel32!VirtualQueryEx cannot read proc hndl") as u64;
    let addr = emu
        .maps
        .read_dword(emu.regs().get_esp() + 4)
        .expect("kernel32!VirtualQueryEx cannot read addr") as u64;
    let out_buff = emu
        .maps
        .read_dword(emu.regs().get_esp() + 8)
        .expect("kernel32!VirtualQueryEx cannot read out_buff") as u64;
    let size = emu
        .maps
        .read_dword(emu.regs().get_esp() + 12)
        .expect("kernel32!VirtualQueryEx cannot read size");

    log_red!(
        emu,
        "kernel32!VirtualQueryEx 0x{:x} 0x{:x} {}",
        addr,
        out_buff,
        size
    );

    if size < 30 {
        log::trace!("buffer to short: {}", size);
        emu.regs_mut().rax = 0;
    } else {
        let mbi = structures::MemoryBasicInformation::guess(addr, &mut emu.maps);
        mbi.save(out_buff, &mut emu.maps);
        emu.regs_mut().rax = 1;
    }

    emu.stack_pop32(false);
    emu.stack_pop32(false);
    emu.stack_pop32(false);
    emu.stack_pop32(false);
}