On Thu, Mar 26, 2009 at 10:43 AM, Rafal Jaworowski <r...@semihalf.com> wrote:
>
> On 2009-03-26, at 15:21, Jon Smirl wrote:
>
>> Libraries appear to be the problem. A program that just returns is 100
>> bytes, add a puts("hello world") and it is 65KB.
>>
>> I had expected the u-boot app examples to be smart and use the copy of
>> those libraries in the u-boot image. For example the demo program in
>> api_examples uses printf (65K library) instead of building an api
>> calling into u-boot for printf.
>
> While I can understand your position, let me explain that the idea behind
> the API was to provide calls to really elementary operations and printf()
> wasn't considered as such (we only have print, get and test a single
> character as far as console ops go); things like pre-formatting should be
> done in the application...
>
> The demo application is just a demo, it links in the same printf-formatting
> code that U-Boot library uses, but specific standalone applications are
> supposed to implement their own formatting routines.
I'm not sure that the size of the app is caused by libraries.
jonsm...@terra:/home/apps/u-boot/api_examples$ ls -l demo.bin
-rwxr-xr-x 1 jonsmirl jonsmirl 79060 2009-03-26 10:58 demo.bin
now gzip the bin....
-rwxr-xr-x 1 jonsmirl jonsmirl 7677 2009-03-26 10:58 demo.bin.gz
Here's the map file; I'm trying to remember how to read it.
There's probably 64K of a data segment being initialized with zeros.
Archive member included because of file (symbol)
libglue.a(ppcstring.o) demo.o (memset)
libglue.a(glue.o) demo.o (ub_dev_get)
libglue.a(crc32.o) libglue.a(glue.o) (crc32)
libglue.a(libgenwrap.o) demo.o (printf)
libglue.a(vsprintf.o) libglue.a(libgenwrap.o) (vsprintf)
libglue.a(ctype.o) libglue.a(vsprintf.o) (_ctype)
libglue.a(string.o) libglue.a(vsprintf.o) (strnlen)
Allocating common symbols
Common symbol size file
___strtok 0x4 libglue.a(string.o)
Discarded input sections
.note.GNU-stack
0x0000000000000000 0x0 demo.o
.note.GNU-stack
0x0000000000000000 0x0 libglue.a(glue.o)
.note.GNU-stack
0x0000000000000000 0x0 libglue.a(crc32.o)
.note.GNU-stack
0x0000000000000000 0x0 libglue.a(libgenwrap.o)
.note.GNU-stack
0x0000000000000000 0x0 libglue.a(vsprintf.o)
.note.GNU-stack
0x0000000000000000 0x0 libglue.a(ctype.o)
.note.GNU-stack
0x0000000000000000 0x0 libglue.a(string.o)
Memory Configuration
Name Origin Length Attributes
*default* 0x0000000000000000 0xffffffffffffffff
Linker script and memory map
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Address of section .text set to 0x40000
LOAD demo.o
LOAD libglue.a
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OUTPUT(demo elf32-powerpc)
--
Jon Smirl
jonsm...@gmail.com
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