Dear All,
Consider the following code:
---------------------------------------------
struct S1
{
char a, b, c;
};
typedef void (*foo_t)(void *arg);
struct S2
{
__xdata void *p;
foo_t f1, f2, f3;
};
void foo1 (void *arg) {arg;}
void foo2 (void *arg) {arg;}
void foo3 (void *arg) {arg;}
void execute (__code struct S2 *s)
{
s->f1 (s->p);
s->f2 (s->p);
s->f3 (s->p);
}
void main (void)
{
static __xdata struct S1 s1;
static __code struct S2 s2 =
{
&s1,
foo1,
foo2,
foo3
};
execute (&s2);
}
---------------------------------------------
It is compiled with sdcc --model-large --stack-auto --std-c99 options.
However it give the following link error:
?ASlink-Warning-Undefined Global '_s1' referenced by module 'main'
I went into the assmebly code and found the error.
;------------------------------------------------------------
;Allocation info for local variables in function 'main'
;------------------------------------------------------------
;s1 Allocated with name '_main_s1_1_1'
;------------------------------------------------------------
; main.c:25: void main (void)
; -----------------------------------------
; function main
; -----------------------------------------
_main:
; main.c:37: s1.a = 1;
mov dptr,#_main_s1_1_1
mov a,#0x01
movx @dptr,a
; main.c:38: execute (&s2);
mov dptr,#_main_s2_1_1
ljmp _execute
.area CSEG (CODE)
.area CONST (CODE)
_main_s2_1_1:
.byte _s1,(_s1 >> 8) ; should be
_main_s1_1_1 instead of s1
.byte _foo1,(_foo1 >> 8)
.byte _foo2,(_foo2 >> 8)
.byte _foo3,(_foo3 >> 8)
.area XINIT (CODE)
.area CABS (ABS,CODE)
Hope I am correct.
Krish
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