Differences between legacy coff and EABI ELF regarding code size

What ISA are you using?  ARM, C6000, or MSP?

Do you have a lot of uninitialized global variables?

thank you for your answer.

Yes i forgot to mention, i am using MSP430 6638. 

yes i have many uninitialized global variables.

Could you please post the linker command files for the COFF and the EABI versions?

Hi. I am using the same command file in both cases. and i have attached a file where you can see that

when i choose the EABI the code composer 16K limit is gone. what does not happen when using the legacy coff

i have just bought a codecomposer from TI Webstore and i am waiting for the license.

/******************************************************************************/

/* lnk_msp430f6638.cmd - LINKER COMMAND FILE FOR LINKING MSP430F6638 PROGRAMS */
/* */
/* Usage: lnk430 <obj files...> -o <out file> -m <map file> lnk.cmd */
/* cl430 <src files...> -z -o <out file> -m <map file> lnk.cmd */
/* */
/*----------------------------------------------------------------------------*/
/* These linker options are for command line linking only. For IDE linking, */
/* you should set your linker options in Project Properties */
/* -c LINK USING C CONVENTIONS */
/* -stack 0x0100 SOFTWARE STACK SIZE */
/* -heap 0x0100 HEAP AREA SIZE */
/* */
/*----------------------------------------------------------------------------*/

/****************************************************************************/
/* SPECIFY THE SYSTEM MEMORY MAP */
/****************************************************************************/

MEMORY
{
SFR : origin = 0x0000, length = 0x0010
PERIPHERALS_8BIT : origin = 0x0010, length = 0x00F0
PERIPHERALS_16BIT : origin = 0x0100, length = 0x0100
RAM : origin = 0x2400, length = 0x4000
INFOA : origin = 0x1980, length = 0x0080
INFOB : origin = 0x1900, length = 0x0080
INFOC : origin = 0x1880, length = 0x0080
INFOD : origin = 0x1800, length = 0x0080
FLASH : origin = 0x8200, length = 0x7D80
FLASH2 : origin = 0x10000,length = 0x38000
INT00 : origin = 0xFF80, length = 0x0002
INT01 : origin = 0xFF82, length = 0x0002
INT02 : origin = 0xFF84, length = 0x0002
INT03 : origin = 0xFF86, length = 0x0002
INT04 : origin = 0xFF88, length = 0x0002
INT05 : origin = 0xFF8A, length = 0x0002
INT06 : origin = 0xFF8C, length = 0x0002
INT07 : origin = 0xFF8E, length = 0x0002
INT08 : origin = 0xFF90, length = 0x0002
INT09 : origin = 0xFF92, length = 0x0002
INT10 : origin = 0xFF94, length = 0x0002
INT11 : origin = 0xFF96, length = 0x0002
INT12 : origin = 0xFF98, length = 0x0002
INT13 : origin = 0xFF9A, length = 0x0002
INT14 : origin = 0xFF9C, length = 0x0002
INT15 : origin = 0xFF9E, length = 0x0002
INT16 : origin = 0xFFA0, length = 0x0002
INT17 : origin = 0xFFA2, length = 0x0002
INT18 : origin = 0xFFA4, length = 0x0002
INT19 : origin = 0xFFA6, length = 0x0002
INT20 : origin = 0xFFA8, length = 0x0002
INT21 : origin = 0xFFAA, length = 0x0002
INT22 : origin = 0xFFAC, length = 0x0002
INT23 : origin = 0xFFAE, length = 0x0002
INT24 : origin = 0xFFB0, length = 0x0002
INT25 : origin = 0xFFB2, length = 0x0002
INT26 : origin = 0xFFB4, length = 0x0002
INT27 : origin = 0xFFB6, length = 0x0002
INT28 : origin = 0xFFB8, length = 0x0002
INT29 : origin = 0xFFBA, length = 0x0002
INT30 : origin = 0xFFBC, length = 0x0002
INT31 : origin = 0xFFBE, length = 0x0002
INT32 : origin = 0xFFC0, length = 0x0002
INT33 : origin = 0xFFC2, length = 0x0002
INT34 : origin = 0xFFC4, length = 0x0002
INT35 : origin = 0xFFC6, length = 0x0002
INT36 : origin = 0xFFC8, length = 0x0002
INT37 : origin = 0xFFCA, length = 0x0002
INT38 : origin = 0xFFCC, length = 0x0002
INT39 : origin = 0xFFCE, length = 0x0002
INT40 : origin = 0xFFD0, length = 0x0002
INT41 : origin = 0xFFD2, length = 0x0002
INT42 : origin = 0xFFD4, length = 0x0002
INT43 : origin = 0xFFD6, length = 0x0002
INT44 : origin = 0xFFD8, length = 0x0002
INT45 : origin = 0xFFDA, length = 0x0002
INT46 : origin = 0xFFDC, length = 0x0002
INT47 : origin = 0xFFDE, length = 0x0002
INT48 : origin = 0xFFE0, length = 0x0002
INT49 : origin = 0xFFE2, length = 0x0002
INT50 : origin = 0xFFE4, length = 0x0002
INT51 : origin = 0xFFE6, length = 0x0002
INT52 : origin = 0xFFE8, length = 0x0002
INT53 : origin = 0xFFEA, length = 0x0002
INT54 : origin = 0xFFEC, length = 0x0002
INT55 : origin = 0xFFEE, length = 0x0002
INT56 : origin = 0xFFF0, length = 0x0002
INT57 : origin = 0xFFF2, length = 0x0002
INT58 : origin = 0xFFF4, length = 0x0002
INT59 : origin = 0xFFF6, length = 0x0002
INT60 : origin = 0xFFF8, length = 0x0002
INT61 : origin = 0xFFFA, length = 0x0002
INT62 : origin = 0xFFFC, length = 0x0002
RESET : origin = 0xFFFE, length = 0x0002
}

/****************************************************************************/
/* SPECIFY THE SECTIONS ALLOCATION INTO MEMORY */
/****************************************************************************/

SECTIONS
{
.bss : {} > RAM /* GLOBAL & STATIC VARS */
.sysmem : {} > RAM /* DYNAMIC MEMORY ALLOCATION AREA */
.stack : {} > RAM (HIGH) /* SOFTWARE SYSTEM STACK */

.text : {}> FLASH /* | FLASH2 CODE */
.text:_isr : {} > FLASH /* ISR CODE SPACE */
.cinit : {} > FLASH /* INITIALIZATION TABLES */
//#ifdef (__LARGE_DATA_MODEL__)
.const : {} > FLASH /*| FLASH2 CONSTANT DATA */
//#else
// .const : {} > FLASH /* CONSTANT DATA */
//#endif
.cio : {} > RAM /* C I/O BUFFER */

.pinit : {} > FLASH /* C++ CONSTRUCTOR TABLES */

.infoA : {} > INFOA /* MSP430 INFO FLASH MEMORY SEGMENTS */
.infoB : {} > INFOB
.infoC : {} > INFOC
.infoD : {} > INFOD

.int00 : {} > INT00 /* MSP430 INTERRUPT VECTORS */
.int01 : {} > INT01
.int02 : {} > INT02
.int03 : {} > INT03
.int04 : {} > INT04
.int05 : {} > INT05
.int06 : {} > INT06
.int07 : {} > INT07
.int08 : {} > INT08
.int09 : {} > INT09
.int10 : {} > INT10
.int11 : {} > INT11
.int12 : {} > INT12
.int13 : {} > INT13
.int14 : {} > INT14
.int15 : {} > INT15
.int16 : {} > INT16
.int17 : {} > INT17
.int18 : {} > INT18
.int19 : {} > INT19
.int20 : {} > INT20
.int21 : {} > INT21
.int22 : {} > INT22
.int23 : {} > INT23
.int24 : {} > INT24
.int25 : {} > INT25
.int26 : {} > INT26
.int27 : {} > INT27
.int28 : {} > INT28
.int29 : {} > INT29
.int30 : {} > INT30
.int31 : {} > INT31
.int32 : {} > INT32
.int33 : {} > INT33
.int34 : {} > INT34
.int35 : {} > INT35
.int36 : {} > INT36
.int37 : {} > INT37
.int38 : {} > INT38
.int39 : {} > INT39
.int40 : {} > INT40
.int41 : {} > INT41
.int42 : {} > INT42
.int43 : {} > INT43
.int44 : {} > INT44
.int45 : {} > INT45
.int46 : {} > INT46
.int47 : {} > INT47
.int48 : {} > INT48
.int49 : {} > INT49
.int50 : {} > INT50
.int51 : {} > INT51
.int52 : {} > INT52
.int53 : {} > INT53
.int54 : {} > INT54
.int55 : {} > INT55
.int56 : {} > INT56
.int57 : {} > INT57
.int58 : {} > INT58
.int59 : {} > INT59
.int60 : {} > INT60
.int61 : {} > INT61
.int62 : {} > INT62
.reset : {} > RESET /* MSP430 RESET VECTOR */
}

/****************************************************************************/
/* INCLUDE PERIPHERALS MEMORY MAP */
/****************************************************************************/

-l msp430f6638.cmd

I'm very sorry, I meant to ask if you could post the linker *map* files

Here is both .map files generated.

thanks in advance.

Hi, thanks for the answer.

Could you point me in the right direction to find the location where this informations are.

I have searched Ti web sit and was not able to find.

I have found http://www.ti.com/lit/ug/slau132e/slau132e.pdf that states the double size as 32bits and no 64. for this project i am using many double variables as time is no critical when doing the math. and change everything to float will cost some time debugging.

i would like to know better the differences between rts430xl.lib and rts430x_lc_ld_eabi.lib.

regards

ok i find here http://www.ti.com/lit/ug/slau132g/slau132g.pdf