#include #include //size_t THREAD_sp = offsetof(struct thread, tr_sp); /* Use %a0 instead of %0 to prevent gcc from emitting a $ before the symbol value in the generated assembly. emitting .set TASK_sp, $56 instead of .set TASK_sp, 56 causes garbage symbols to be generated. */ #define DEFINE(sym, val) \ asm volatile("\n.global " #sym "\n.type " #sym ", @object" "\n.set " #sym ", %a0" : : "i" (val)) #define OFFSET(sym, str, mem) \ DEFINE(sym, offsetof(str, mem)) static void __used common(void) { OFFSET(THREAD_sp, struct thread, tr_sp); }