I'm trying to compile C/ASM mixed code (spnu151e.pdf, page 126) with 4.6.3 CGT in Code Composer Studio.
There is the test project (for ARM core in Beagleboard):
=========== CORTEXA8.cmd ===========
/* SPECIFY THE SYSTEM MEMORY MAP */
MEMORY
{
DDR : org = 0x80000000 len = 0x04000000 /* 64MB (assume IVA to use other half) */
}
/* SPECIFY THE SECTIONS ALLOCATION INTO MEMORY */
SECTIONS
{
.bss : {} > DDR /* GLOBAL & STATIC VARS */
.sysmem : {} > DDR /* DYNAMIC MEMORY ALLOCATION AREA */
.stack : {} > DDR /* SOFTWARE SYSTEM STACK */
.data : {} > DDR
.text : {} > DDR /* CODE */
.cinit : {} > DDR /* INITIALIZATION TABLES */
.const : {} > DDR /* CONSTANT DATA */
.pinit : {} > DDR /* TEMPLATE INSTANTIATION TABLES */
}
=========== main.c ===========
#include <stdio.h>
extern "C"
{
extern int asmfunc(int a); /* declare external asm function */
int gvar = 0; /* define global variable */
}
void main()
{
int I = 5;
while(1)
{
I = asmfunc(I); /* call function normally */
}
}
=========== test.asm ===========
.global _asmfunc
.global _gvar
_asmfunc:
LDR r1, gvar_a
LDR r2, [r1, #0]
ADD r0, r0, r2
STR r0, [r1, #0]
MOV pc, lr
gvar_a .field _gvar, 32
=============================
Compiler didn't understand "extern "C" directive (in main.c) and gvar_a symbol (in test.asm).
Could you give me some advices how to link .asm procedure with C/C++ code in CCS 4.1 IDE?
[there is no problem with a similar task on c64x cores].
