Exclude section from .romp

christophschmid — Thu, 05 May 2016 15:49:47 GMT

I need to exclude an array from being initialized during boot. Therefore I added a new memory section "m_data_reset" in processor expert:

And mapped this array into my new section:

static uint8_t __attribute__ ((section (".m_data_reset"))) array[SIZE];

As expected the new section isn't initialized by "zero_fill_bss()", but it gets zeroed by "__copy_rom_sections_to_ram()". I can manually suppress this by deleting the corresponding lines from ".romp" in the linker file:

.romp : AT(_romp_at)

{

__S_romp = _romp_at;

LONG(___ROM_AT);

LONG(_sdata);

LONG(___data_size);

LONG(___m_data_reset_ROMStart); /* These lines */

LONG(___m_data_reset_RAMStart); /* I have to */

LONG(___m_data_reset_ROMSize); /* delete */

LONG(0);

} > m_data

But as the linker file gets overwritten every time processor expert is run, I'm looking for a solution to tell processor expert to exclude this section from initialization. (Why is it included anyway in ".romp", the array isn't initialized? And it's not an array issue, a normal - non-array - variable is zeroed by "__copy_rom_sections_to_ram()" as well.)

The only possible solution I've found up to know is to prevent processor expert to generate the linker file at all and to maintain it manually.

I'm using CodeWarrior 10.6 for SKEAZN64 with the GNU tool chain.

Re: Exclude section from .romp

ZhangJennie — Tue, 31 May 2016 06:04:00 GMT

hi,

The .romp is used by the linker for the ‘copy-down’ and initialization of .data.

if you want customize your own linker file, set "Generate linker file" as "no", thus the linker file will not be overwritten by processor expert.

Have a great day,
Jennie Zhang

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topic Re: Exclude section from .romp in CodeWarrior for MCU

Exclude section from .romp

Re: Exclude section from .romp