vasilito
10caab7085
Comprehensive boot process improvement across the entire stack: Compositor (NEW): Real Rust Wayland display server (690 lines) - Full XDG shell protocol (15/15 protocols implemented and verified) - wl_shm.format, xdg_wm_base, xdg_surface.get_toplevel support - wl_buffer.release lifecycle, buffer composite to framebuffer - Framebuffer mapping via scheme:memory (Redox) with fallback - PID/status files for greeterd health checks - Integration test suite (3 cases passing) - Diagnostic tool: redbear-compositor-check DRM/KMS Chain: - KWIN_DRM_DEVICES=/scheme/drm/card0 wired through init→greeterd→compositor - session-launch propagates KWIN_DRM_DEVICES (new test, 11/11 pass) - DRM auto-detect + 5s wait loop in compositor wrapper - Boot verified: compositor uses DRM backend in QEMU Intel DRM: - Gen8-Gen12 supported with firmware (SKL/KBL/CNL/ICL/GLK/RKL/DG1/TGL/ADLP/DG2/MTL/ARL/LNL/BMG) - Gen4-Gen7 device IDs recognized, unsupported with clear error message - Linux 7.0 i915 reference for all 200+ device IDs - Display fixes: sticky pipe refresh, PIPE=4/PORT=6, 64-bit page flip, EDID skeleton - 4 durability patches wired into recipe VirtIO GPU Driver (NEW): - 220-line DRM/KMS backend for QEMU virtio-gpu - Full GpuDriver trait implementation (11 methods) - PCI BAR0 framebuffer mapping, connector/mode info, GEM management Kernel: - 4GB RAM hang root cause: MEMORY_MAP overflow at 512 entries → fixed to 1024 - Canary chain R S 1 2 3 4 5 6 7 (9 COM1 checkpoints through boot) - Verified: kernel boots at 4GB with all canaries present - 3 durability patches (P0-canary, P1-memory-overflow) Live ISO: - Preload capped at 1 GiB with partial preload messaging - P5 patch wired into bootloader recipe Greeter: - Startup progress logging (4 checkpoints) - QML crash diagnostic (exit code 1 → specific error message) - greeterd tests: 8/8 pass Boot Daemons: - dhcpd: auto-detect interface from /scheme/netcfg/ifaces/ - i2c-gpio-expanderd: I2C decode retry (3× with 50ms delay) - ucsid: same I2C decode hardening - Compositor: safe framebuffer fallback (prevents crash) Qt6 Toolchain: - -march=x86-64 for CPU compatibility (prevents invalid_opcode on core2duo) - -fpermissive for header compatibility (unlinkat/linkat redefinition) Documentation: - BOOT-PROCESS-IMPROVEMENT-PLAN.md (comprehensive, 320 lines) - PROFILE-MATRIX.md: ISO organization, RAM requirements, known issues - BOOT-PROCESS-ASSESSMENT.md: Phase 7 kernel hang diagnosis - Deleted 4 stale docs (BAREMETAL-LOG, ACPI-FIXES, 02-GAP-ANALYSIS, _CUB_RBPKGBUILD) - Cross-references updated across all docs KWin stubs replaced with real compositor delegation. redbear-kde-session script created for post-login session launch. 30+ files, 10 patches, 3 binaries, 22 tests, 0 errors.
91 lines
4.1 KiB
Diff
91 lines
4.1 KiB
Diff
diff --git a/src/arch/x86_shared/start.rs b/src/arch/x86_shared/start.rs
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index 7a7c0ae8..f1dbb6b4 100644
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--- a/src/arch/x86_shared/start.rs
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+++ b/src/arch/x86_shared/start.rs
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@@ -82,6 +82,15 @@ extern "C" fn kstart() {
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/// The entry to Rust, all things must be initialized
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unsafe extern "C" fn start(args_ptr: *const KernelArgs, stack_end: usize) -> ! {
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unsafe {
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+ // EARLY CANARY: write 'R' to COM1 before any kernel init.
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+ // This proves the serial hardware works and the kernel reached Rust entry.
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+ // If this character appears but "Redox OS starting..." does not,
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+ // the hang is in args_ptr.read(), serial::init(), or graphical_debug::init().
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+ #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
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+ {
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+ core::arch::asm!("out dx, al", in("dx") 0x3F8u16, in("al") b'R', options(nostack, preserves_flags));
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+ }
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+
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let bootstrap = {
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let args = args_ptr.read();
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@@ -91,27 +100,49 @@ unsafe extern "C" fn start(args_ptr: *const KernelArgs, stack_end: usize) -> ! {
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// Set up graphical debug
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graphical_debug::init(args.env());
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+ // SECOND CANARY: write 'S' to COM1 after serial init.
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+ // If 'R' appears but 'S' does not, the hang is in serial::init() or graphical_debug::init().
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+ #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
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+ {
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+ core::arch::asm!("out dx, al", in("dx") 0x3F8u16, in("al") b'S', options(nostack, preserves_flags));
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+ }
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+
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info!("Redox OS starting...");
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args.print();
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+ #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
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+ { core::arch::asm!("out dx, al", in("dx") 0x3F8u16, in("al") b'1', options(nostack, preserves_flags)); }
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+
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// Set up GDT
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gdt::init_bsp(stack_end);
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+ #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
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+ { core::arch::asm!("out dx, al", in("dx") 0x3F8u16, in("al") b'2', options(nostack, preserves_flags)); }
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+
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// Set up IDT
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idt::init_bsp();
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+ #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
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+ { core::arch::asm!("out dx, al", in("dx") 0x3F8u16, in("al") b'3', options(nostack, preserves_flags)); }
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+
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// Initialize RMM
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#[cfg(target_arch = "x86")]
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crate::startup::memory::init(&args, Some(0x100000), Some(0x40000000));
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#[cfg(target_arch = "x86_64")]
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crate::startup::memory::init(&args, Some(0x100000), None);
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+ #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
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+ { core::arch::asm!("out dx, al", in("dx") 0x3F8u16, in("al") b'4', options(nostack, preserves_flags)); }
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+
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// Initialize paging
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paging::init();
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#[cfg(target_arch = "x86_64")]
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crate::arch::alternative::early_init(true);
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+ #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
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+ { core::arch::asm!("out dx, al", in("dx") 0x3F8u16, in("al") b'5', options(nostack, preserves_flags)); }
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+
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// Set up syscall instruction
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interrupt::syscall::init();
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@@ -121,6 +152,9 @@ unsafe extern "C" fn start(args_ptr: *const KernelArgs, stack_end: usize) -> ! {
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// Activate memory logging
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crate::log::init();
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+ #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
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+ { core::arch::asm!("out dx, al", in("dx") 0x3F8u16, in("al") b'6', options(nostack, preserves_flags)); }
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+
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// Initialize miscellaneous processor features
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#[cfg(target_arch = "x86_64")]
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crate::arch::misc::init(LogicalCpuId::BSP);
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@@ -128,6 +162,9 @@ unsafe extern "C" fn start(args_ptr: *const KernelArgs, stack_end: usize) -> ! {
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// Initialize devices
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device::init();
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+ #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
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+ { core::arch::asm!("out dx, al", in("dx") 0x3F8u16, in("al") b'7', options(nostack, preserves_flags)); }
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+
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// Read ACPI tables, starts APs
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if cfg!(feature = "acpi") {
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crate::acpi::init(args.acpi_rsdp());
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