#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <ucontext.h>
#include <stdint.h>
#include <stdlib.h>

void print(int sig, siginfo_t *info, void* v)
{
        ucontext_t* ctx = (ucontext_t*)v;
        printf("CTX %p\n",ctx);
        printf("mcontext off %ld\n",(intptr_t)&ctx->uc_mcontext       - (intptr_t)ctx);
        printf("gregs off %ld\n",   (intptr_t)&ctx->uc_mcontext.gregs - (intptr_t)ctx);
        printf("fpregs off %ld\n", (intptr_t)ctx->uc_mcontext.fpregs - (intptr_t)ctx);
        printf("XMM0 %llx\n", *((long long*) & ctx->uc_mcontext.fpregs->_xmm[0]));
        printf("XMM1 %llx\n", *((long long*) & ctx->uc_mcontext.fpregs->_xmm[1]));
        exit(-1);
}
int main(){
        long long C1 = 0x1122334455667788LL;
        long long C2 = 0xAABBAABBAABBCCCCLL;
        struct sigaction sa;
        //sa.sa_handler=print;
        sa.sa_sigaction=print;// warning here: assignment from incompatible pointer type
        sa.sa_flags=SA_SIGINFO;
        sigaction(SIGSEGV,&sa,NULL);
        asm volatile(
          "movdqu %0, %%xmm0;"
          "movdqu %1, %%xmm1;"
          "movl   $42, (0)" // BOOOOOOOOOM
          : : "m" (C1), "m" (C2));
}