为什么我的initramfs无法检测到init

Question

I am compiling an initramfs from minimalfs and it fails to detect init during boot. I have 2 simlinks one at /init and another at sbin/init both pointing to /sbin/init.sysvinit

I just have tried passing the filesystem directory as well as the cpio in the kernel config. The following is the tail of bootlog:

=========================================================

[    2.152221] vmmc: supplied by vbat                                           
[    2.157139] omap_i2c 44e0b000.i2c: bus 0 rev0.11 at 400 kHz                  
[    2.165445] omap_i2c 4802a000.i2c: bus 1 rev0.11 at 100 kHz                  
[    2.208472]  remoteproc0: wkup_m3 is available                               
[    2.213169]  remoteproc0: Note: remoteproc is still under development and co.
[    2.222618]  remoteproc0: THE BINARY FORMAT IS NOT YET FINALIZED, and backwa.
[    2.233660]  remoteproc0: Direct firmware load failed with error -2          
[    2.240280]  remoteproc0: Falling back to user helper                        
[    2.245995] cpu cpu0: of_pm_voltdm_notifier_register: Fail calculating volta2
[    2.259066] input: volume_keys.8 as /devices/volume_keys.8/input/input2      
[    2.266959] /home/preetam/Workspace/neato/ti-processor-sdk-linux-am335x-evm-)
[    2.287394] Warning: unable to open an initial console.                      
[    2.300184] Freeing unused kernel memory: 4212K (c0587000 - c09a4000)        
[    2.307330] Failed to execute /init (error -2)                               
[    2.312502] Kernel panic - not syncing: No working init found.  Try passing .
[    8.180642] random: nonblocking pool is initialized

==========================================================================

The following is my bootargs:

"console=${console} earlyprintk=serial mem=128m"

The hardware I am using is am335x based custom board which is a full custom version of beagle bone that is product specific. Has 128MB DDR ram.

Answer 1

The init was an elf binary with dynamic libraries linked to it. I found it by using readelf -d on the init file. So I needed to add the libc library that I thought would be linked statically in init. Big thanks to "that toher guy".