Thumb function pointers with position independent code?

Vote count:

0

I want function caller to take a thumb function pointer as an argument:

void fun(void) {}

void caller(void(*f)(void)) {
    f();
}

void _start(void) {
    caller(fun);
}

When I compile it with

arm-elf-gcc -mthumb -c -fpic test.c

and then link

arm-elf-ld test.o

, linker tries to wrap fun with interwork code and warns about interworking not enabled. But I don't want to enable interwork, because I want it to be thumb-only code. Without -fpic, code compiles and function pointer works correctly.

If want to ask why I have to pass thumb function pointers and provide PIC code, it's because the API which I can't change.

asked 50 secs ago

krdln

38