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int global;
static char local;
void hello(int arg)
{
switch (arg) {
case 1:
printf("Inner-module call hello()\n");
break;
case 2:
printf("Inter-module call hello()\n");
break;
default:
return;
}
}
#if defined (__arm__)
int rtems_arm(int arg)
{
switch (arg) {
case 24:
printf("R_ARM_JUMP24: arg = 24\n");
break;
}
return 0;
}
int rtems_thumb(int arg)
{
switch (arg) {
case 19:
printf("R_ARM_THM_JUMP19: arg = 19\n");
break;
case 24:
printf("R_ARM_THM_JUMP24: arg = 24\n");
break;
}
return 0;
}
#endif
/* This is the init entry, Because init() use "blx", it is not needed
* to handle arm/thumb switch here
*/
int rtems(int argc, char **argv)
{
local = 1;
printf("In rtems() local = %d\n", local); //inner-module data access
hello(1); //inner-module call
test(argc, argv);
#if defined (__arm__)
#ifdef THUMB_TEST
__asm__ volatile (
"push {r0}\r\n"
"push {lr}\r\n"
"mov r0, #19\r\n"
"cmp r0, #19\r\n"
"mov lr, pc\r\n"
"add lr, #7\r\n"
"beq rtems_thumb\r\n" /*THM_JUMP19*/
"nop\r\n"
"nop\r\n"
"nop\r\n"
"nop\r\n"
"pop {lr}\r\n"
"pop {r0}\r\n"
);
__asm__ volatile (
"push {r0}\r\n"
"push {lr}\r\n"
"mov r0, #24\r\n"
"mov lr, pc\r\n"
"add lr, #7\r\n"
"b.w rtems_thumb\r\n" /*THM_JUMP24*/
"nop\r\n"
"nop\r\n"
"nop\r\n"
"nop\r\n"
"pop {lr}\r\n"
"pop {r0}\r\n"
);
#elif defined ARM_TEST
/*arm instruction test*/
__asm__ volatile (
"push {r0}\r\n"
"push {lr}\r\n"
"mov r0, #24\r\n"
"mov lr, pc\r\n"
"add lr, #4\r\n"
"b rtems_arm\r\n" /*JUMP24*/
"nop\r\n"
"nop\r\n"
"nop\r\n"
"nop\r\n"
"pop {lr}\r\n"
"pop {r0}\r\n"
);
#endif
#else
/* other archs */
#endif
return 0;
}
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