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57 lines
1.4 KiB
Rust
57 lines
1.4 KiB
Rust
// SPDX-License-Identifier: MIT OR Apache-2.0
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//
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// Copyright (c) 2022 Andre Richter <andre.o.richter@gmail.com>
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//! A simple sanity test to see if exception restore code works.
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#![feature(format_args_nl)]
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#![no_main]
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#![no_std]
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/// Console tests should time out on the I/O harness in case of panic.
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mod panic_wait_forever;
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use core::arch::asm;
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use libkernel::{bsp, cpu, driver, exception, info, memory, println};
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#[inline(never)]
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fn nested_system_call() {
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#[cfg(target_arch = "aarch64")]
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unsafe {
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asm!("svc #0x1337", options(nomem, nostack, preserves_flags));
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}
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#[cfg(not(target_arch = "aarch64"))]
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{
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info!("Not supported yet");
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cpu::wait_forever();
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}
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}
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#[no_mangle]
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unsafe fn kernel_init() -> ! {
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use driver::interface::DriverManager;
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use memory::mmu::interface::MMU;
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exception::handling_init();
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bsp::driver::driver_manager().qemu_bring_up_console();
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// This line will be printed as the test header.
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println!("Testing exception restore");
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if let Err(string) = memory::mmu::mmu().enable_mmu_and_caching() {
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info!("MMU: {}", string);
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cpu::qemu_exit_failure()
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}
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info!("Making a dummy system call");
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// Calling this inside a function indirectly tests if the link register is restored properly.
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nested_system_call();
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info!("Back from system call!");
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// The QEMU process running this test will be closed by the I/O test harness.
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cpu::wait_forever();
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}
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