最近移植的OpenHarmony，使用qemu启动时运行init报错了，具体日志如下：

[    2.893957] Run /init as init process
[    2.906628] Failed to execute /init (error -22)
[    2.906981] Run /bin/init as init process
[    2.908712] Kernel panic - not syncing: Requested init /bin/init failed (error -22).
[    2.909450] CPU: 2 PID: 1 Comm: init Not tainted 6.1.36 #1
[    2.909888] Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015
[    2.910501] Stack : 0000000000000000 0000000000000000 90000000011ceb20 9000000008128000
[    2.911198]         900000000812bc90 0000000000000000 0000000000000000 900000000151539e
[    2.911676]         900000000812bc98 0000000000000140 0000000000000140 0000000000000000
[    2.912176]         900000000812b982 000000000000018f 0000000000000006 000000000000ffff
[    2.912667]         0000000000ffff0a ffffffffffffffff 0000000000000016 0000000000000000
[    2.913239]         9000000009bc8e00 0000000000000002 0000000005d94000 900000000151539e
[    2.913725]         0000000000000004 00000000000000b0 0000000000000004 0000000000000000
[    2.914234]         0000000000000000 0000000000000000 0000000000000000 0000000000000000
[    2.914751]         0000000000000000 0000000000000000 9000000000222e10 0000000000000000
[    2.915703]         00000000000000b0 0000000000000004 0000000000000000 0000000000071c1c
[    2.916226]         ...
[    2.916471] Call Trace:
[    2.916714] [<9000000000222e10>] show_stack+0x70/0x140
[    2.917874] [<90000000011ceb20>] dump_stack_lvl+0x5c/0x7c
[    2.918171] [<90000000011c5934>] panic+0x14c/0x338
[    2.918435] [<90000000011d02cc>] kernel_init+0xac/0x180
[    2.918703] [<9000000000221730>] ret_from_kernel_thread+0xc/0x9c
[    2.919076] 
[    2.924982] ---[ end Kernel panic - not syncing: Requested init /bin/init failed (error -22). ]---

已经确认过ramdisk.img中是有/init程序的。只是内核启动参数中没有指定system/vendor分区配置。

我也使用busybox制作的ramdisk.img测试过，能够正常运行，因此内核应该是正常的。

看源代码中init有单元测试，想先测试一下init功能是否正常。那么，这些单元测试怎么运行呢？需要在设备上运行吗？

解决办法

该问题是由于内核的页大小（16KB）和elf的段对齐（4KB）不一致导致的vm_mmap()函数报错。修改编译选项增加-Wl,-z,max-page-size=16384，使elf段按照16KB对齐后，能够正常启动init了。