Problem in bringing up Linux 2.4.4. (.eh_frame?)

[Francis Yu <francisy@luxn.com>]

Hi,
I have figured out what I have done wrong to get that extra section
".eh_frame". I had modified the CLAGS_KERNEL in the makefile to include the
option "-ggdb" while I was experimenting with the BDI2000.
Francis

>  -----Original Message-----
> From: 	Francis Yu <francisy at luxn.com>
> Sent:	Wednesday, June 18, 2003 12:29 PM
> To:	linuxppc-embedded at lists.linuxppc.org
> Subject:	Problem in bringing up Linux 2.4.4.
>
> Hi,
> I am using a PPC860 board which is very much similar to the EST board. I
> have successfully ported PPCBOOT 1.2.0 and VMLINUX 2.4.? on it. Now I have
> upgraded my host environment to RedHat 8.0 and want to re-build the Linux
> kernel. I have downloaded PPCBOOT 2.0 and VMLINUX 2.4.4 from DENX (and
> also RAMDISK2048). After I programmed the images into Flash, the PPCBOOT
> came up OK, but the console did not display anything else after the
> statement "Transferring control to Linux (at address 00000000)...". I
> looked into the log_buf and found that there is nothing but zeros. Then I
> used the BDI2000 to breakpoint it at the printk function, and found out
> that the log_buf in the code is at 0xc0166eec whereas the log_buf in the
> map is at 0xc0186eec. By comparing the listing files I found that in the
> new Linux build I have an extra section called .eh_frame as indicated
> below (idx 5). I wonder what this section is for. Could someone please
> shed some light into this. Thanks.
> Francis
>
>
> /eldk/linux-2.4.4/vmlinux:     file format elf32-powerpc
> Sections:
> Idx Name          Size      VMA       LMA       File off  Algn
>   0 .text         00117808  c0000000  c0000000  00010000  2**5
>                   CONTENTS, ALLOC, LOAD, READONLY, CODE
>   1 .text.exit    00000588  c0117808  c0117808  00127808  2**2
>                   CONTENTS, ALLOC, LOAD, READONLY, CODE
>   2 .rodata       00029a94  c0117d90  c0117d90  00127d90  2**4
>                   CONTENTS, ALLOC, LOAD, READONLY, DATA
>   3 .kstrtab      000036c0  c0141824  c0141824  00151824  2**2
>                   CONTENTS, ALLOC, LOAD, READONLY, DATA
>   4 .data         00011f84  c0145000  c0145000  00155000  2**4
>                   CONTENTS, ALLOC, LOAD, DATA
>   5 .eh_frame     0001fcb0  c0156f84  c0156f84  00166f84  2**2
>                   CONTENTS, ALLOC, LOAD, DATA
>   6 .exitcall.exit 00000060  c0176c34  c0176c34  00186c34  2**2
>                   CONTENTS, ALLOC, LOAD, DATA
>   7 __ex_table    00000bb0  c0176c94  c0176c94  00186c94  2**2
>                   CONTENTS, ALLOC, LOAD, READONLY, DATA
>   8 __ksymtab     00001b58  c0177844  c0177844  00187844  2**2
>                   CONTENTS, ALLOC, LOAD, READONLY, DATA
>   9 .data.cacheline_aligned 00000460  c01793a0  c01793a0  001893a0  2**4
>                   CONTENTS, ALLOC, LOAD, DATA
>  10 .text.init    0000a858  c017a000  c017a000  0018a000  2**2
>                   CONTENTS, ALLOC, LOAD, READONLY, CODE
>  11 .data.init    00000e74  c0184858  c0184858  00194858  2**2
>                   CONTENTS, ALLOC, LOAD, DATA
>  12 .setup.init   000000b8  c01856d0  c01856d0  001956d0  2**2
>                   CONTENTS, ALLOC, LOAD, DATA
>  13 .initcall.init 00000094  c0185788  c0185788  00195788  2**2
>                   CONTENTS, ALLOC, LOAD, DATA
>  14 .bss          00039070  c0186000  c0186000  00196000  2**4
>                   ALLOC
>  15 .debug_abbrev 000520c5  00000000  00000000  00196000  2**0
>                   CONTENTS, READONLY, DEBUGGING
>  16 .debug_info   02015947  00000000  00000000  001e80c5  2**0
>                   CONTENTS, READONLY, DEBUGGING
>  17 .debug_line   002f7d1c  00000000  00000000  021fda0c  2**0
>                   CONTENTS, READONLY, DEBUGGING
>  18 .debug_pubnames 0001a91f  00000000  00000000  024f5728  2**0
>                   CONTENTS, READONLY, DEBUGGING
>  19 .debug_aranges 00003128  00000000  00000000  02510047  2**0
>                   CONTENTS, READONLY, DEBUGGING
>  20 .comment      00004dee  00000000  00000000  0251316f  2**0
>                   CONTENTS, READONLY
> Disassembly of section .text:
>
> c0000000 <__start>:
> c0000000:	7c 7f 1b 78 	mr	r31,r3
> c0000004:	7c 9e 23 78 	mr	r30,r4
> c0000008:	7c bd 2b 78 	mr	r29,r5
> c000000c:	7c dc 33 78 	mr	r28,r6
> c0000010:	7c fb 3b 78 	mr	r27,r7
> c0000014:	3b 00 00 00 	li	r24,0
>

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