* RE: [ECOS] Programs Image Size
2000-07-20 16:47 [ECOS] Programs Image Size Fabrice Gautier
@ 2000-07-20 17:28 ` Gary Thomas
0 siblings, 0 replies; 2+ messages in thread
From: Gary Thomas @ 2000-07-20 17:28 UTC (permalink / raw)
To: Fabrice Gautier; +Cc: Ecos-List (E-mail)
On 20-Jul-2000 Fabrice Gautier wrote:
> Hi,
>
> When building the examples in the eCos/examples directory, with a default
> ARM PID board configuration, the resulting .exe images are about 1 Meg in
> size. However when downloading to the board the downloaded size is only
> about 40Ko. Why is there such a difference? What are in the .exe images? And
> how can I evaluate the "real" size?
>
The executable image will contain information used by GDB and/or Insight
for debugging purposes. Since this information must represent the program
in it's entirety, you can imagine it might be large.
If you want to see how big a program is, try using "size" or "objdump".
E.g.
[gary@hermes edb7212_test]$ arm-elf-size install/tests/kernel/current/tests/tm_basic
text data bss dec hex filename
43184 5360 5798192 5846736 5936d0 install/tests/kernel/current/tests/tm_basic
[gary@hermes edb7212_test]$ arm-elf-objdump -h install/tests/kernel/current/tests/tm_basic
install/tests/kernel/current/tests/tm_basic: file format elf32-littlearm
Sections:
Idx Name Size VMA LMA File off Algn
0 .debug_aranges 000010a0 00000000 00000000 00013da0 2**0
CONTENTS, READONLY, DEBUGGING
1 .debug_pubnames 00002ed7 00000000 00000000 00014e40 2**0
CONTENTS, READONLY, DEBUGGING
2 .debug_info 0006dda7 00000000 00000000 00017d17 2**0
CONTENTS, READONLY, DEBUGGING
3 .debug_abbrev 00005adf 00000000 00000000 00085abe 2**0
CONTENTS, READONLY, DEBUGGING
4 .debug_line 00012f73 00000000 00000000 0008b59d 2**0
CONTENTS, READONLY, DEBUGGING
5 .rom_vectors 00000060 00008000 00008000 00008000 2**5
CONTENTS, ALLOC, LOAD, CODE
6 .text 0000a850 00008060 00008060 00008060 2**2
CONTENTS, ALLOC, LOAD, READONLY, CODE
7 .fini 00000000 000128b0 000128b0 0009e510 2**0
CONTENTS
8 .rodata 000010e0 000128b0 000128b0 000128b0 2**2
CONTENTS, ALLOC, LOAD, DATA
9 .rodata1 00000000 00013990 00013990 0009e510 2**0
CONTENTS
10 .fixup 00000000 00013990 00013990 0009e510 2**0
CONTENTS
11 .gcc_except_table 00000000 00013990 00013990 0009e510 2**0
CONTENTS
12 .data 00000410 00013990 00013990 00013990 2**2
CONTENTS, ALLOC, LOAD, DATA
13 .bss 00587930 00013da0 00013da0 00013da0 2**4
ALLOC
14 .sram 00000000 60000000 60000000 0009e510 2**0
CONTENTS
From this example, you can see that the code size of this program is
only 43k, but the debug information is quite large (750k).
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