RE: [ECOS] Probleme with ram rom data sections

[Matthieu dot GIRARDIN at fr dot thalesgroup dot com]

> > Well good afternoon everybody !
> >
> > I tried to modify my memory layout. I want 4 Mo ROM at
> 0x4000000 and 2Mo RAM
> > at 0x000.
> > I modify my mlt files as follow :
> >
> > mlt_powerpc_mbx_rom.ldi:
> >    
> > MEMORY
> > {
> >     ram : ORIGIN = 0, LENGTH = 0x200000
> >     rom : ORIGIN = 0x4000000, LENGTH = 0x400000
> > }
> >
> > SECTIONS
> > {
> >     SECTIONS_BEGIN
> >     SECTION_vectors (rom, 0x4000000, LMA_EQ_VMA)
> >     SECTION_text (rom, ALIGN (0x4), LMA_EQ_VMA)
> >     SECTION_fini (rom, ALIGN (0x4), LMA_EQ_VMA)
> >     SECTION_rodata1 (rom, ALIGN (0x8), LMA_EQ_VMA)
> >     SECTION_rodata (rom, ALIGN (0x8), LMA_EQ_VMA)
> >     SECTION_fixup (rom, ALIGN (0x4), LMA_EQ_VMA)
> >     SECTION_gcc_except_table (rom, ALIGN (0x1), LMA_EQ_VMA)
> >     CYG_LABEL_DEFN(__reserved_vectors) = 0; . =
> > CYG_LABEL_DEFN(__reserved_vectors) + 0x3000;
> >     CYG_LABEL_DEFN(__reserved_vsr_table) = ALIGN (0x1); . =
> > CYG_LABEL_DEFN(__reserved_vsr_table) + 0x200;
> >     CYG_LABEL_DEFN(__reserved_virtual_table) = ALIGN (0x1); . =
> > CYG_LABEL_DEFN(__reserved_virtual_table) + 0x100;
> >     SECTION_data (ram, ALIGN (0x10), FOLLOWING(.gcc_except_table))
> >     //SECTION_data (ram, ALIGN (0x10), AT(0x4200000))
> >     SECTION_sbss (ram, ALIGN (0x4), LMA_EQ_VMA)
> >     SECTION_bss (ram, ALIGN (0x10), LMA_EQ_VMA)
> >     CYG_LABEL_DEFN(__heap1) = ALIGN (0x8);
> >     SECTIONS_END
> > }
> >
> >
> > mlt_powerpc_mbx_rom.h:
> >
> > #ifndef __ASSEMBLER__
> > #include <cyg/infra/cyg_type.h>
> > #include <stddef.h>
> >
> > #endif
> > #define CYGMEM_REGION_ram (0)
> > #define CYGMEM_REGION_ram_SIZE (0x200000)
> > #define CYGMEM_REGION_ram_ATTR (CYGMEM_REGION_ATTR_R |
> CYGMEM_REGION_ATTR_W)
> > #define CYGMEM_REGION_rom (0x4000000)
> > #define CYGMEM_REGION_rom_SIZE (0x400000)
> > #define CYGMEM_REGION_rom_ATTR (CYGMEM_REGION_ATTR_R)
> > #ifndef __ASSEMBLER__
> > extern char CYG_LABEL_NAME (__reserved_vectors) [];
> > #endif
> > #define CYGMEM_SECTION_reserved_vectors (CYG_LABEL_NAME
> > (__reserved_vectors))
> > #define CYGMEM_SECTION_reserved_vectors_SIZE (0x3000)
> > #ifndef __ASSEMBLER__
> > extern char CYG_LABEL_NAME (__reserved_vsr_table) [];
> > #endif
> > #define CYGMEM_SECTION_reserved_vsr_table (CYG_LABEL_NAME
> > (__reserved_vsr_table))
> > #define CYGMEM_SECTION_reserved_vsr_table_SIZE (0x200)
> > #ifndef __ASSEMBLER__
> > extern char CYG_LABEL_NAME (__reserved_virtual_table) [];
> > #endif
> > #define CYGMEM_SECTION_reserved_virtual_table (CYG_LABEL_NAME
> > (__reserved_virtual_table))
> > #define CYGMEM_SECTION_reserved_virtual_table_SIZE (0x100)
> > #ifndef __ASSEMBLER__
> > extern char CYG_LABEL_NAME (__heap1) [];
> > #endif
> > #define CYGMEM_SECTION_heap1 (CYG_LABEL_NAME (__heap1))
> > #define CYGMEM_SECTION_heap1_SIZE (0x400000 - (size_t)
> CYG_LABEL_NAME
> > (__heap1))
> >
> > Well now, my problem is :
> > when I read the nm output from my file generated
> (powerpc-eabi-nm) I can see
> > (result 1 just under) the right symbol __rom_data_start at
> the end of the
> > rom but when I transform it into S-Record file (Motorola
> standard file)
> > before to flash it I can see (result 2 just under) that
> there is nothing
> > after this adress; as if the data section was empty...
> > If someone can help it would be great.
> >
> > Result 1:
> >
> > 04023498 V typeinfo name for std::bad_cast
> > 040234a4 V typeinfo name for std::type_info
> > 040234b4 W raise
> > 04023570 A _etext
> > 0402442c r hex.2
> > 040258ac A __FIXUP_START__
> > 04025a1c A __EXCEPT_END__
> > 04025a1c A __EXCEPT_START__
> > 04025a1c A __FIXUP_END__
> > 04025a20 A __rom_data_start
> >
> > Result 2:
> >
> > S3190402598004023364040233680402336C040233700402337CC6
> > S3190402599404023380040233840402338804023394040233981E
> > S319040259A80402339C040233A0040233AC040233B0040233B476
> > S319040259BC040233B8040233BC040233C0040233C4040233C8EE
> > S319040259D0040233CC040233D0040233D4040233D8040233DC76
> > S319040259E4040233E0040233E4040233E8040233EC040233F0FE
> > S319040259F8040233F4040233F8040233FC040234000402340484
> > S30D04025A0C040234080000000044                             
>     <-- the end
> > of the rom
> >    
> > nothing in data section
> > S31900003300000000003B9ACA00000000640400AA040400AC044A     
>     <-- the
> > beginning of the ram
> > S319000033140400D0E40400D0EC0400AD900400AD980400B05C8D
> > S319000033280400A9380400B08C0400B1A00400B2600400B398AC
> > S3190000333C0400D0E40400D0EC0400B5440400B56C0400B5D450
>
> What does "powerpc-eabi-objdump -h <FILE>.elf" show?
> What does your command to create the S-record file look like?
>
> --
> Gary Thomas <gary@mlbassoc.com>
> MLB Associates
>

Well, just under is the result of "powerpc-eabi-objdump -h <FILE>.elf".
My command to create my S-Record is "dump -Rv -o map.dmp <FILE>.elf".
So it seems the objdump give us a correct answer (or I'am stupid...).
But I can't load my elf in flash because before when I read my map.dmp
there is nothing in the data section.
Thanks if you can help.

powerpc-eabi-objdump:

perf.otr.rom.le.1010.a.1502.elf:     file format elf32-powerpc

Sections:
Idx Name          Size      VMA       LMA       File off  Algn
  0 .vectors      00002000  04000000  04000000  00010000  2**8
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
  1 .text         00021570  04002000  04002000  00012000  2**3
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
  2 .fini         00000000  04023570  04023570  00045694  2**0
                  CONTENTS
  3 .rodata1      00000000  04023570  04023570  00045694  2**0
                  CONTENTS
  4 .rodata       0000233c  04023570  04023570  00033570  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  5 .fixup        00000170  040258ac  040258ac  000358ac  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  6 .gcc_except_table 00000000  04025a1c  04025a1c  00045694  2**0
                  CONTENTS
  7 .data         00002394  00003300  04025a20  00043300  2**3
                  CONTENTS, ALLOC, LOAD, CODE
  8 .sbss         000000d5  00005694  00005694  00005694  2**2
                  ALLOC
  9 .bss          000f792c  00005770  00005770  0000569b  2**4
                  ALLOC
 10 .comment      0000061e  00000000  00000000  00045694  2**0
                  CONTENTS, READONLY 


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