Uncompressing Linux...ERROR

you are right, nacide.

although my problem happens with nios2-download program,

it is also the byte alignment issue.

after tracing the booting process,

i found that if the size of generated vmlinux.bin.gz (in linux-2.6.x/arch/nios2nommu/boot/compressed/) is odd,

i will get "length error" during uncompressing kernel.

it is because that in function gunzip (linux-2.6.x/lib/inflate.c),

it always gets wrong length value when size of vmlinux.bin.gz is odd.

orig_crc[23:00] is correct, but orig_crc[31:24](the last byte we get) is wrong.

the length value in zImage is correct, but it gets wrong value during uncompressing.

what i did is trying to add some spaces at the end of .data section in linux-2.6.x/arch/nios2nommu/boot/compressed/vmlinux.scr in order to make sure that we can get correct orig_crc[31:24] byte without byte alignment issue.

SECTIONS
{
   .data : { 
      input_len = .;
      LONG(input_data_end - input_data) input_data = .; 
      *(.data) 
      input_data_end = .;
      LONG(0) /* for byte alignment issue */
   }
}

now i can always get the workable image after that patch. http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/cool.gif

here are steps i do to generate image.

1. make clean vendor_hwselect SYSPTF=~/project/ptf/nios2.ptf

2. make romfs

3. make

4. make linux image