[Buildroot] Noobie hat for a day

[Baruch Siach]

Hi Charles,

On Wed, Aug 08, 2012 at 03:37:18PM -0700, Charles Krinke wrote:
> Putting on my 'noobie' hat again for a day, I am bolloxed as to why I
> compile the same kernel with two different toolchains and one works
> and the other dies.

The right direction for this question is the Linux ARM kernel mailing list. 
See http://lists.infradead.org/mailman/listinfo/linux-arm-kernel. For this 
particular platform you can also try the linux-omap mailing list. See 
http://vger.kernel.org/vger-lists.html#linux-omap.

baruch

> Here are two boots. Earlyprintk is compiled in and earlyprintk is on
> the kernel command line. The same source is used in both cases. The
> non-functioning one is is compiled with Sourcery CodeBench 2011.09-70
> and it dies early. The functioning one is compiled with the
> CodeSourcery 2010.09-50 toolchain.
> 
> Clearly earlyprintk does show a difference (Thank you for that
> suggestion last week). But as to why the kernel for this TI AM3517EVM
> dies with the newer Sourcery Codebench is a question I am hoping
> someone can answer.
> 
> Uncompressing Linux... done, booting the kernel.
> Linux version 2.6.37+ (ckrinke at dellx) (gcc version 4.6.1 (Sourcery
> CodeBench Lite 2011.09-70) ) #5 Wed Aug 8 15:25:02 PDT 2012
> CPU: ARMv7 Processor [411fc087] revision 7 (ARMv7), cr=10c53c7f
> CPU: VIPT nonaliasing data cache, VIPT nonaliasing instruction cache
> Machine: OMAP3517/AM3517 EVM
> bootconsole [earlycon0] enabled
> Reserving 4194304 bytes SDRAM for VRAM
> Memory policy: ECC disabled, Data cache writeback
> AM3517 ES1.1 (l2cache iva sgx neon isp )
> SRAM: Mapped pa 0x40200000 to va 0xfe400000 size: 0x10000
> Unhandled fault: alignment exception (0x001) at 0xc04ee62b
> Internal error: : 1 [#1]
> 
> Uncompressing Linux... done, booting the kernel.
> Linux version 2.6.37+ (ckrinke at dellx) (gcc version 4.5.1 (Sourcery G++
> Lite 2010.09-50) ) #3 Wed Aug 8 12:43:27 PDT2
> CPU: ARMv7 Processor [411fc087] revision 7 (ARMv7), cr=10c53c7f
> CPU: VIPT nonaliasing data cache, VIPT nonaliasing instruction cache
> Machine: OMAP3517/AM3517 EVM
> Reserving 4194304 bytes SDRAM for VRAM
> Memory policy: ECC disabled, Data cache writeback
> AM3517 ES1.1 (l2cache iva sgx neon isp )
> SRAM: Mapped pa 0x40200000 to va 0xfe400000 size: 0x10000
> Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 64000
> Kernel command line: console=ttyO2,115200n8 earlyprintk
> root=/dev/mtdblock4 rw rootfstype=jffs2
> PID hash table entries: 1024 (order: 0, 4096 bytes)
> Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
> Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
> Memory: 252MB = 252MB total
> Memory: 243656k/243656k available, 18488k reserved, 0K highmem
> Virtual kernel memory layout:
>     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
>     fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
>     DMA     : 0xffc00000 - 0xffe00000   (   2 MB)
>     vmalloc : 0xd0800000 - 0xf8000000   ( 632 MB)
>     lowmem  : 0xc0000000 - 0xd0000000   ( 256 MB)
>     modules : 0xbf000000 - 0xc0000000   (  16 MB)
>       .init : 0xc0008000 - 0xc003a000   ( 200 kB)
>       .text : 0xc003a000 - 0xc05959c4   (5487 kB)
>       .data : 0xc0596000 - 0xc074ce60   (1756 kB)

-- 
     http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
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