Epson S5U1C17001C, Manual

Page: 538 / 742

10-88
EPSOn
S5U1C17001C ManUal
(C COMPilEr PaCkagE fOr S1C17 faMily) (Ver. 1.5.0)
10 DEBUggEr
#define SP_INI 0x1000
.global ext_test
ext_test:
ld.a %r7, %sp ;
Xld.a %r2, SP_INI ; set SP
ld.a %sp, %r2
ld.a -[%sp], %r7 ; save SP
ld.a -[%sp], %r1 ; save return address
ld.a -[%sp], %r0 ; save debug ram start address
ld.a %r6, %r0 ; %r0 : debug ram start address = ****28
add.a %r6, 0x0c
ld %r0, [%r6]+ ; Set Arg1
ld %r1, [%r6]+
ld %r2, [%r6]+ ; Set Arg2
ld %r3, [%r6]+
ld %r5, [%r6]+ ; Set Arg3
ld %r4, [%r6]+
sub.a %sp, 4
ld [%sp+0x0], %r5
ld [%sp+0x2], %r4
Xcall iprint_data ; enter C program
; return = %r0: message buffer address
add.a %sp, 4
ld.a %r6, %r0 ;
ld.a %r0, [%sp]+ ; restore debug ram start address
ld.a [%r0], %r6 ; set %r0 ( message address ) to WBUF data1
ld.a %r1, [%sp]+ ; restore return address
ld.a %r7, [%sp]+ ; restore SP
ld.a %sp, %r7
jpa %r1 ; back to mini monitor
User function
#include "stdio.h"
void *iprint_data( long arg1, long arg2, long arg3 );
struct {
long size;
char buf[0x100];
} tmpbuf;
void *iprint_data( long arg1, long arg2, long arg3 )
{
tmpbuf.size = sprintf(tmpbuf.buf,"arg1=%d,arg2=%d,arg3=%d",arg1,arg2,arg3);
return (void*)&tmpbuf;
}
Notes
If any function without an entry program is called, gdb may run uncontrollably.