aarch64-qemu-virt：启动卡死问题

[alvinsun039]

问题复现：

$ make run ARCH=aarch64
...
warning: `starry-api` (lib) generated 10 warnings (run `cargo fix --lib -p starry-api` to apply 9 suggestions)
    Finished `release` profile [optimized] target(s) in 0.13s
./scripts/make/dwarf.sh /home/sk/workdir/StarryOS/StarryOS_aarch64-qemu-virt.elf rust-objcopy --binary-architecture=aarch64
rust-objcopy --binary-architecture=aarch64 /home/sk/workdir/StarryOS/StarryOS_aarch64-qemu-virt.elf -O binary --strip-all /home/sk/workdir/StarryOS/StarryOS_aarch64-qemu-virt.bin
    Running on qemu...
qemu-system-aarch64 -m 1G -smp 1 -cpu cortex-a72 -machine virt -kernel /home/sk/workdir/StarryOS/StarryOS_aarch64-qemu-virt.bin -device virtio-blk-pci,drive=disk0 -drive id=disk0,if=none,format=raw,file=disk.img -device virtio-net-pci,netdev=net0 -netdev user,id=net0,hostfwd=tcp::5555-:5555,hostfwd=udp::5555-:5555 -nographic -s -S
QEMU 8.2.2 monitor - type 'help' for more information
(qemu) q

qemu没有任何输出，卡死在内核初始化接阶段？

主机环境信息：

$ cat /etc/issue
Ubuntu 24.04.3 LTS \n \l

$ uname -a
Linux sk-Yoga-14sARH-2021 6.14.0-32-generic #32~24.04.1-Ubuntu SMP PREEMPT_DYNAMIC Tue Sep  2 14:21:04 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
$ rustc --version
rustc 1.92.0-nightly (2300c2aef 2025-10-12)
$ cargo --version
cargo 1.92.0-nightly (81c3f77a4 2025-10-10)

** 因为本地cargo版本与ax-plat不匹配，对源码做了些修改以使用最新的rust工具链：

diff --git a/modules/axdriver/src/lib.rs b/modules/axdriver/src/lib.rs
index ed007dc..7399066 100644
--- a/modules/axdriver/src/lib.rs
+++ b/modules/axdriver/src/lib.rs
@@ -57,7 +57,7 @@
 //! [dyn]: https://doc.rust-lang.org/std/keyword.dyn.html

 #![no_std]
-#![feature(doc_auto_cfg)]
+#![feature(doc_cfg)]
 #![feature(associated_type_defaults)]
 #![feature(c_variadic)]

diff --git a/modules/axhal/src/lib.rs b/modules/axhal/src/lib.rs
index a279baa..d8b149f 100644
--- a/modules/axhal/src/lib.rs
+++ b/modules/axhal/src/lib.rs
@@ -28,7 +28,7 @@
 //! [cargo test]: https://doc.rust-lang.org/cargo/guide/tests.html

 #![no_std]
-#![feature(doc_auto_cfg)]
+#![feature(doc_cfg)]

 #[allow(unused_imports)]
 #[macro_use]
diff --git a/modules/axruntime/src/lib.rs b/modules/axruntime/src/lib.rs
index 17a2253..3d13d90 100644
--- a/modules/axruntime/src/lib.rs
+++ b/modules/axruntime/src/lib.rs
@@ -17,7 +17,7 @@
 //! All the features are optional and disabled by default.

 #![cfg_attr(not(test), no_std)]
-#![feature(doc_auto_cfg)]
+#![feature(doc_cfg)]

 #[macro_use]
 extern crate axlog;
diff --git a/modules/axtask/src/lib.rs b/modules/axtask/src/lib.rs
index 483684c..711c587 100644
--- a/modules/axtask/src/lib.rs
+++ b/modules/axtask/src/lib.rs
@@ -26,7 +26,6 @@

 #![cfg_attr(not(test), no_std)]
 #![feature(doc_cfg)]
-#![feature(doc_auto_cfg)]
 #![feature(linkage)]

 #[cfg(test)]
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index c045ffc..735c07e 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,6 +1,6 @@
 [toolchain]
 profile = "minimal"
-channel = "nightly-2025-05-20"
+channel = "nightly"
 components = ["rust-src", "llvm-tools", "rustfmt", "clippy"]
 targets = [
     "x86_64-unknown-none",

gdb调试问题

(gdb) ni
0x00000000401a7124 in ?? ()
(gdb) x/32i $pc
=> 0x401a7124:	mov	x29, sp      // 执行完这条指令就卡死
   0x401a7128:	mov	x8, xzr
   0x401a712c:	mov	w9, #0x1                   	// #1
   0x401a7130:	msr	spsel, x9
   0x401a7134:	msr	sp_el0, x8
   0x401a7138:	mrs	x8, currentel
   0x401a713c:	ubfx	x8, x8, #2, #2
   0x401a7140:	cmp	x8, #0x1
   0x401a7144:	b.hi	0x401a7150  // b.pmore
   0x401a7148:	ldp	x29, x30, [sp], #16
   0x401a714c:	ret
   0x401a7150:	cmp	x8, #0x3
   0x401a7154:	b.ne	0x401a7170  // b.any
   0x401a7158:	mov	w8, #0x501                 	// #1281
   0x401a715c:	mov	w9, #0x3c5                 	// #965
   0x401a7160:	msr	scr_el3, x8
   0x401a7164:	msr	spsr_el3, x9
   0x401a7168:	mov	x8, x30
   0x401a716c:	msr	elr_el3, x8
   0x401a7170:	mov	x8, xzr
   0x401a7174:	mrs	x9, cnthctl_el2
   0x401a7178:	mov	w10, #0x80000000            	// #-2147483648
   0x401a717c:	orr	x9, x9, #0x3
   0x401a7180:	mov	w11, #0x3c5                 	// #965
   0x401a7184:	msr	cnthctl_el2, x9
   0x401a7188:	msr	cntvoff_el2, x8
   0x401a718c:	msr	hcr_el2, x10
   0x401a7190:	msr	spsr_el2, x11
   0x401a7194:	mov	x8, sp
   0x401a7198:	msr	sp_el1, x8
   0x401a719c:	mov	x8, x30
   0x401a71a0:	msr	elr_el2, x8
(gdb) ni
^C
Program received signal SIGINT, Interrupt.
(gdb) p/x $sp
$21 = 0xffff000041f8f000   // sp寄存器突变
(gdb) p/x $ESR_EL1
$23 = 0x8600000d
(gdb) p/x $FAR_EL1
$24 = 0x200

objdump分析可执行文件：

target/aarch64-unknown-none-softfloat/release/starry:     file format elf64-littleaarch64


Disassembly of section .text:

ffff000040200000 <_ZN24axplat_aarch64_qemu_virt4boot14_start_primary17h65bc99950a752cb1E>:
ffff000040200000:       d53800b3        mrs     x19, mpidr_el1
ffff000040200004:       92405e73        and     x19, x19, #0xffffff
ffff000040200008:       aa0003f4        mov     x20, x0
ffff00004020000c:       f000f668        adrp    x8, ffff0000420cf000 <_ZN24axplat_aarch64_qemu_virt4boot10BOOT_STACK17h4310b12898ed56f9E>
ffff000040200010:       91410108        add     x8, x8, #0x40, lsl #12
ffff000040200014:       9100011f        mov     sp, x8
ffff000040200018:       94049c42        bl      ffff000040327120 <_ZN5axcpu7aarch644init13switch_to_el117h06c28a64fbfc8037E>
ffff00004020001c:       94047490        bl      ffff00004031d25c <_ZN24axplat_aarch64_qemu_virt4boot9enable_fp17h4b3de8d0db17c955E>
ffff000040200020:       94047479        bl      ffff00004031d204 <_ZN24axplat_aarch64_qemu_virt4boot20init_boot_page_table17h568a961e62e9da95E>
ffff000040200024:       f000f640        adrp    x0, ffff0000420cb000 <_ZN24axplat_aarch64_qemu_virt4boot10BOOT_PT_L017h4669af10279f05fdE>
ffff000040200028:       94049c61        bl      ffff0000403271ac <_ZN5axcpu7aarch644init8init_mmu17h0b30bb6f66c3b3b5E>
ffff00004020002c:       d2ffffe8        mov     x8, #0xffff000000000000         // #-281474976710656
ffff000040200030:       8b2863ff        add     sp, sp, x8
ffff000040200034:       aa1303e0        mov     x0, x19
ffff000040200038:       aa1403e1        mov     x1, x20
ffff00004020003c:       58000268        ldr     x8, ffff000040200088 <_start+0x40>
ffff000040200040:       d63f0100        blr     x8
ffff000040200044:       14000000        b       ffff000040200044 <_ZN24axplat_aarch64_qemu_virt4boot14_start_primary17h65bc99950a752cb1E+0x44>

ffff000040200048 <_start>:
ffff000040200048:       91005a4d        add     x13, x18, #0x16
ffff00004020004c:       17ffffed        b       ffff000040200000 <_ZN24axplat_aarch64_qemu_virt4boot14_start_primary17h65bc99950a752cb1E>
        ...
ffff000040200058:       01f42fb8        .word   0x01f42fb8
ffff00004020005c:       00000000        .word   0x00000000
ffff000040200060:       0000000a        .word   0x0000000a
        ...
ffff000040200080:       644d5241        .word   0x644d5241
ffff000040200084:       00000000        .word   0x00000000
ffff000040200088:       40381464        .word   0x40381464
ffff00004020008c:       ffff0000        .word   0xffff0000

_start作为entry，应该链接在_start_primary之前？！

临时解决方案：
修改axplat-aarch64-qemu-virt:

diff --git a/platforms/axplat-aarch64-qemu-virt/src/boot.rs b/platforms/axplat-aarch64-qemu-virt/src/boot.rs
index e344f53..83cf1c1 100644
--- a/platforms/axplat-aarch64-qemu-virt/src/boot.rs
+++ b/platforms/axplat-aarch64-qemu-virt/src/boot.rs
@@ -73,7 +73,7 @@ unsafe extern "C" fn _start() -> ! {
 
 /// The earliest entry point for the primary CPU.
 #[unsafe(naked)]
-#[unsafe(link_section = ".text.boot")]
+#[unsafe(link_section = ".text.boot2")]
 unsafe extern "C" fn _start_primary() -> ! {
     // X0 = dtb
     core::arch::naked_asm!("
@@ -114,7 +114,7 @@ unsafe extern "C" fn _start_primary() -> ! {
 /// The earliest entry point for the secondary CPUs.
 #[cfg(feature = "smp")]
 #[unsafe(naked)]
-#[unsafe(link_section = ".text.boot")]
+#[unsafe(link_section = ".text.boot2")]
 pub(crate) unsafe extern "C" fn _start_secondary() -> ! {
     // X0 = stack pointer
     core::arch::naked_asm!("

修改arceos/modules/axhal/linker.lds.S:

diff --git a/modules/axhal/linker.lds.S b/modules/axhal/linker.lds.S
index 8410009..2c38c05 100644
--- a/modules/axhal/linker.lds.S
+++ b/modules/axhal/linker.lds.S
@@ -11,6 +11,7 @@ SECTIONS
     .text : ALIGN(4K) {
         _stext = .;
         *(.text.boot)
+        *(.text.boot2)
         *(.text .text.*)
         . = ALIGN(4K);
         _etext = .;

[Azure-stars]

请提供一下一个可复现版本，可以推在 github 上的某个分支。

推测可能是因为 Rustc 工具链版本过新导致链接行为发生改变，需要进一步确定。

[alvinsun039]

基于https://github.com/Starry-OS/StarryOS：

commit 066ebdbe5e4d104a69499c2182fe3183696a9fc8 (HEAD -> main, origin/main, origin/HEAD)
Author: Asakura Mizu <asakuramizu111@gmail.com>
Date:   Fri Oct 10 15:50:20 2025 +0800

    update starry-vm to 0.2

工具链版本就是问题里提到的：

$ rustc --version
rustc 1.92.0-nightly (2300c2aef 2025-10-12)
$ cargo --version
cargo 1.92.0-nightly (81c3f77a4 2025-10-10)

[pai2shub]

在 starryos

branch main

commit a8c556585303447a7a3470d2578635ceb00ffe8e

已经可以正常启动

make ARCH=aarch64 build

make img ARCH=aarch64

make run ARCH=aarch64

[AsakuraMizu]

应该和 arceos-org/axplat_crates#25 是一样的问题，修复在 arceos-org/axplat_crates#26