asm_defines.c

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#ifdef ASM_DEFINES


#include <scheduler/process.h>
#include <arch/x86/jmp.h>

#define DEFINE(sym, val) __asm__ __volatile__("\n-> " #sym " %0 \n" : : "i" (val))

#define OFFSETOF(s, m) DEFINE(offsetof_##s##_##m, offsetof(s, m));

#define SIZEOF(s) DEFINE(sizeof_##s, sizeof(s));

void foo(void)
{
    // We need the offset of the LP State to make a context switch in ECS
    SIZEOF(struct lp_struct);
    OFFSETOF(struct lp_struct, context);

    // Size and offsets of a context are used when creating/saving/restoring contexts in jmp.S
    SIZEOF(exec_context_t);
    OFFSETOF(exec_context_t, rax);
    OFFSETOF(exec_context_t, rdx);
    OFFSETOF(exec_context_t, rcx);
    OFFSETOF(exec_context_t, rbx);
    OFFSETOF(exec_context_t, rsp);
    OFFSETOF(exec_context_t, rbp);
    OFFSETOF(exec_context_t, rsi);
    OFFSETOF(exec_context_t, rdi);
    OFFSETOF(exec_context_t, r8);
    OFFSETOF(exec_context_t, r9);
    OFFSETOF(exec_context_t, r10);
    OFFSETOF(exec_context_t, r11);
    OFFSETOF(exec_context_t, r12);
    OFFSETOF(exec_context_t, r13);
    OFFSETOF(exec_context_t, r14);
    OFFSETOF(exec_context_t, r15);
    OFFSETOF(exec_context_t, rip);
    OFFSETOF(exec_context_t, flags);
    OFFSETOF(exec_context_t, fpu);
}

#endif /* ASM_DEFINES */