qemu-exit

Exit QEMU with user-defined code.

Quit a running QEMU session with user-defined exit code. Useful for unit or integration tests using QEMU.

TL;DR

use qemu_exit::QEMUExit;

#[cfg(target_arch = "aarch64")]
let qemu_exit_handle = qemu_exit::AArch64::new();

// addr: The address of sifive_test.
#[cfg(target_arch = "riscv64")]
let qemu_exit_handle = qemu_exit::RISCV64::new(addr);

// io_base:             I/O-base of isa-debug-exit.
// custom_exit_success: A custom success code; Must be an odd number.
#[cfg(target_arch = "x86_64")]
let qemu_exit_handle = qemu_exit::X86::new(io_base, custom_exit_success);

qemu_exit_handle.exit(1337);
qemu_exit_handle.exit_success();
qemu_exit_handle.exit_failure();

Architecture Specific Configuration

AArch64

Pass the -semihosting argument to the QEMU invocation, e.g.:

qemu-system-aarch64 -M raspi3 -serial stdio -semihosting -kernel kernel8.img

RISCV64

You need to chose a machine with the sifive_test device, for exemple -M virt:

qemu-system-riscv64 -M virt -nographic -monitor none -serial stdio -kernel kernel.elf

x86_64

Add the special ISA debug exit device by passing the flags:

-device isa-debug-exit,iobase=0xf4,iosize=0x04

When instantiating the handle, iobase must be given as the first parameter.

The second parameter must be an EXIT_SUCCESS code of your choice that is an odd number, aka bit number zero must be 1. This is needed because in QEMU, the provided code is internally binary-OR'ed with 0x1. This is hardcoded and therefore, with isa-debug-exit, it is not possible to let QEMU invoke exit(0).

let qemu_exit_handle = qemu_exit::X86::new(io_base, custom_exit_success);

Literature

• Semihosting for AArch32 and AArch64
• QEMU isa-debug-exit source
• QEMU sifive_test source

Authors

• @andre-richter Andre Richter
• @Skallwar Esteban Blanc

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT License (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

See the THIRD_PARTY_NOTICES.md for more information about utilized third party projects and their respective licenses.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.