more on objcopy

[steven james]

Greetings,

The size in the ldscripts is controlled by ROM_IMAGE_SIZE in the mainboard
config file. With care, it should be changable, but there is a good bit of
magic in there (I'm trying to get rid of some of that in the boards I
have, but it is slow going and some of it is hard to get rid of). 

Of course, if the selected size is too small, bad things happen (I don't
know if it will build a broken image, or just fail to build).

The thing is, a build where ionly the actual size needed gets used
presents some real problems for getting target addresses right. 

G'day,
sjames


On Wed, 5 Feb 2003, Ronald G. Minnich wrote:

> ok, I think objcoyp is doing the right thing. Whew!
> 
> Here are the sections:
> [Nr] Name              Type            Addr     Off    Size   ES Flg Lk 
> Inf Al
>   [ 0]                   NULL            00000000 000000 000000 00      0   
> 0  0
>   [ 1] .rom              PROGBITS        ffff4000 001000 002400 00  AX  0   
> 0  8
>   [ 2] .payload          PROGBITS        ffff6400 003400 0049b3 00  WA  0   
> 0  1
>   [ 3] .reset            PROGBITS        fffffff0 007ff0 000010 00   A  0   
> 0  1
>   [ 4] .id               PROGBITS        ffffffd3 007fd3 00001d 00   A  0   
> 0  1
>   [ 5] .text             PROGBITS        fffffff0 007ff0 000000 00  AX  0   
> 0  4
>   [ 6] .data             PROGBITS        fffffff0 007ff0 000000 00  WA  0   
> 0  4
>   [ 7] .bss              NOBITS          fffffff0 008ff0 000000 00  WA  0   
> 0  4
>   [ 8] .shstrtab         STRTAB          00000000 008ff0 000045 00      0   
> 0  1
>   [ 9] .symtab           SYMTAB          00000000 0091f0 0010e0 10     10  
> bf  4
>   [10] .strtab           STRTAB          00000000 00a2d0 0010f8 00      0   
> 0  1
> 
> The .rom starts at 0xffff4000, which gives you a 49152-byte section. 
> 
> I think the .ldscript is giving a fixed-size linuxbios without regard to 
> how  big it actually is, which means tuning via things like max log 
> message etc. is no longer a real option. It also means my etherboot, which 
> is 17K, no longer fits together with linuxbios into 64K. 
> 
> OK, back to the drawing board :-)
> 
> ron
> 
> _______________________________________________
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> Linuxbios at clustermatic.org
> http://www.clustermatic.org/mailman/listinfo/linuxbios
> 

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-------------------------steven james, director of research, linux labs
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