/sbin/init does not run on ibm4xx

[Rin Okuyama <rokuyama%rk.phys.keio.ac.jp@localhost>]

/sbin/init does not start on ibm4xx for -current and 7.0_STABLE,
whereas it normally runs for 7.0.1.

For 7.99.34 and 7.99.26 (found at ftp7.jp.n.o), it fails as follows.

  init: copying out flags `-s' 3
  init: copying out path `/sbin/init' 11
  exec /sbin/init: error 13
  init: copying out flags `-s' 3
  init: copying out path `/sbin/oinit' 12
  exec /sbin/oinit: error 2
  ...

Note that 13 == EACCESS and 2 == ENOENT. For 7.0_STABLE, it also fails,
but with different error code.

  init: copying out flags `-s' 3
  init: copying out path `/sbin/init' 11
  exec /sbin/init: error 2
  init: copying out flags `-s' 3
  init: copying out path `/sbin/oinit' 12
  exec /sbin/oinit: error 2
  ...

I tried both md and nfs root, and got the same results. /bin/sh does not
start with the same error codes.

On the other hand, init and other userland binaries normally run for 7.0.1.
But, it fails with kernel of -current or 7.0_STABLE and userland of 7.0.1.

I attached dmesg of -current below. Any ideas?

Thanks,
Rin
====
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NetBSD 7.99.34 (INSTALL_OPENBLOCKS266) #0: Thu Jul 21 20:05:55 JST 2016
        rin@XXX:XXX
Model: OpenBlockS266 IBM PowerPC 405GPr Board
total memory = 128 MB
avail memory = 119 MB
plb0 (root)
cpu0 at plb0: 267MHz 405GPr (PVR 0x50910951)
cpu0: 16KB/32B L1 instruction cache
cpu0: 16KB/32B L1 data cache
ecc0 at plb0 irq 17: ECC controller
opb0 at plb0
com0 at opb0 addr 0xef600300 irq 0: ns16550a, working fifo
com0: console
com1 at opb0 addr 0xef600400 irq 1: ns16550a, working fifo
emac0 at opb0 addr 0xef600800 irq 15: Ethernet Media Access Controller
emac0: Ethernet address 00:0a:85:03:b2:60
lxtphy0 at emac0 phy 0: LXT971/2 10/100 media interface, rev. 2
lxtphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
opbgpio0 at opb0 addr 0xef600700: On-Chip GPIO controller
gpio0 at opbgpio0: 24 pins
gpiic0 at opb0 addr 0xef600500 irq 2: On-Chip IIC controller
iic0 at gpiic0: I2C bus
xrtc0 at iic0 addr 0x6f: Xicor X1226 Real-time Clock/NVRAM
wdog0 at opb0: 4 second period
pchb0 at plb0
pchb0: vendor 1014 product 0156 (rev. 0x21)
pci0 at pchb0
vendor 1014 product 0156 (host bridge, revision 0x21) at pci0 dev 0 function 0 not configured
hptide0 at pci0 dev 3 function 0
hptide0: Triones/Highpoint HPT371 IDE Controller
genppc_pci_intr_map: pin: 1, line: 30
hptide0: using irq 30 for native-PCI interrupt
atabus0 at hptide0 channel 0
atabus1 at hptide0 channel 1
tlp0 at pci0 dev 4 function 0: Davicom DM9102A Ethernet, pass 4.0
genppc_pci_intr_map: pin: 1, line: 31
tlp0: interrupting at irq 31
tlp0: Ethernet address 00:0a:85:03:32:60
dmphy0 at tlp0 phy 1: DM9102 10/100 media interface, rev. 1
dmphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
exb at plb0 not configured
Setting PIT to 266666666/100 = 2666666
wd0 at atabus1 drive 0
wd0: <TRANSCEND>
wd0: 486 MB, 989 cyl, 16 head, 63 sec, 512 bytes/sect x 996912 sectors
root on md0a dumps on md0b
mountroot: trying lfs...
mountroot: trying ext2fs...
mountroot: trying ffs...
root file system type: ffs
kern.module.path=/stand/powerpc-ibm4xx/7.99.34/modules
WARNING: clock lost 2 days
WARNING: using filesystem time
WARNING: CHECK AND RESET THE DATE!
init: copying out flags `-s' 3
init: copying out path `/sbin/init' 11
exec /sbin/init: error 13
init: copying out flags `-s' 3
init: copying out path `/sbin/oinit' 12
exec /sbin/oinit: error 2
init: copying out flags `-s' 3
init: copying out path `/sbin/init.bak' 15
exec /sbin/init.bak: error 2
init: copying out flags `-s' 3
init: copying out path `/rescue/init' 13
exec /rescue/init: error 2
init path (default /sbin/init): /bin/sh
init: copying out flags `-s' 3
init: copying out path `/bin/sh' 8
exec /bin/sh: error 13
init path (default /sbin/init): reboot
syncing disks... done
unmounting file systems...
unmounting 0x7e51008 / (root_device)...
unmounting done
rebooting