76 lines
2.1 KiB
Rust
76 lines
2.1 KiB
Rust
//! Holey Bytes Experimental Runtime
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#![deny(unsafe_op_in_unsafe_fn)]
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#[cfg(unix)]
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#[path = "unix.rs"]
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mod platform;
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#[cfg(windows)]
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#[path = "win32.rs"]
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mod platform;
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mod mem;
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use {
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hbvm::{mem::Address, Vm, VmRunOk},
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std::{env::args, process::exit},
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};
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fn main() -> Result<(), Box<dyn std::error::Error>> {
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eprintln!("== HB×RT (Holey Bytes Experimental Runtime) v0.1 ==");
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eprintln!("[W] Currently supporting only flat images");
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let Some(image_path) = args().nth(1) else {
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eprintln!("[E] Missing image path");
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exit(1);
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};
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// Allocate stack
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let stack_ptr = unsafe { platform::alloc_stack(1024 * 1024 * 2) }?;
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eprintln!("[I] Stack allocated at {stack_ptr:p}");
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// Load program
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eprintln!("[I] Loading image from \"{image_path}\"");
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let ptr = unsafe { platform::mmap_bytecode(image_path) }?;
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eprintln!("[I] Image loaded at {ptr:p}");
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let mut vm = unsafe { Vm::<_, 0>::new(mem::HostMemory, Address::new(ptr as u64)) };
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vm.write_reg(254, stack_ptr as u64);
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unsafe { platform::catch_mafs() }?;
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// Execute program
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let stat = loop {
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match vm.run() {
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Ok(VmRunOk::Breakpoint) => eprintln!(
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"[I] Hit breakpoint\nIP: {}\n== Registers ==\n{:?}",
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vm.pc, vm.registers
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),
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Ok(VmRunOk::Timer) => (),
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Ok(VmRunOk::Ecall) => unsafe {
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std::arch::asm!(
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"syscall",
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inlateout("rax") vm.registers[1].0,
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in("rdi") vm.registers[2].0,
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in("rsi") vm.registers[3].0,
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in("rdx") vm.registers[4].0,
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in("r10") vm.registers[5].0,
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in("r8") vm.registers[6].0,
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in("r9") vm.registers[7].0,
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)
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},
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Ok(VmRunOk::End) => break Ok(()),
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Err(e) => break Err(e),
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}
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};
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eprintln!("\n== Registers ==\n{:?}", vm.registers);
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if let Err(e) = stat {
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eprintln!("\n[E] Runtime error: {e:?}");
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exit(2);
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}
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Ok(())
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}
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