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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;
#if defined PPC
case 24:
printf("PPC ADDR24 'bla hello' call\n");
break;
case 14:
printf("PPC REL14 'beq cr7, hello' jump\n");
break;
case 15:
printf("PPC ADDR14 'beqa cr7, hello' jump\n");
break;
#endif
default:
printf("no arg in hello\n");
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
#elif defined PPC
__asm__ volatile (
"stwu 3, -8(1)\r\n"
"li 3, 24\r\n"
"bla hello\r\n" /*ADDR24*/
"nop\r\n"
"nop\r\n"
"lwz 3, 8(1)\r\n"
"addi 1, 1, 8\r\n"
);
__asm__ volatile (
"stwu 3, -4(1)\r\n"
"li 3, 14\r\n"
"cmpwi cr7, 3, 14\r\n"
"bl 1f\r\n"
"1: mflr 6\r\n"
"addi 6, 6, 20\r\n"
"mtlr 6\r\n"
"beq cr7, hello\r\n" /*REL14*/
"nop\r\n"
"nop\r\n"
"nop\r\n"
"lwz 3, 4(1)\r\n"
"addi 1, 1, 4\r\n"
);
#else
/* other archs */
#endif
return 0;
}
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