lldb/test/Shell/Register/Inputs/x86-64-gp-write.cpp

   1 #include <cinttypes>
   2 #include <cstdint>
   3 #include <cstdio>
   4
   5 int main() {
   6   constexpr uint64_t fill = 0x0F0F0F0F0F0F0F0F;
   7
   8   uint64_t rax, rbx, rcx, rdx, rsp, rbp, rsi, rdi;
   9
  10   asm volatile(
  11     // save rsp & rbp
  12     "movq    %%rsp, %4\n\t"
  13     "movq    %%rbp, %5\n\t"
  14     "\n\t"
  15     "movq    %8, %%rax\n\t"
  16     "movq    %8, %%rbx\n\t"
  17     "movq    %8, %%rcx\n\t"
  18     "movq    %8, %%rdx\n\t"
  19     "movq    %8, %%rsp\n\t"
  20     "movq    %8, %%rbp\n\t"
  21     "movq    %8, %%rsi\n\t"
  22     "movq    %8, %%rdi\n\t"
  23     "\n\t"
  24     "int3\n\t"
  25     "\n\t"
  26     // swap saved & current rsp & rbp
  27     "xchgq    %%rsp, %4\n\t"
  28     "xchgq    %%rbp, %5\n\t"
  29     : "=a"(rax), "=b"(rbx), "=c"(rcx), "=d"(rdx), "=r"(rsp), "=r"(rbp),
  30       "=S"(rsi), "=D"(rdi)
  31     : "g"(fill)
  32     :
  33   );
  34
  35   printf("rax = 0x%016" PRIx64 "\n", rax);
  36   printf("rbx = 0x%016" PRIx64 "\n", rbx);
  37   printf("rcx = 0x%016" PRIx64 "\n", rcx);
  38   printf("rdx = 0x%016" PRIx64 "\n", rdx);
  39   printf("rsp = 0x%016" PRIx64 "\n", rsp);
  40   printf("rbp = 0x%016" PRIx64 "\n", rbp);
  41   printf("rsi = 0x%016" PRIx64 "\n", rsi);
  42   printf("rdi = 0x%016" PRIx64 "\n", rdi);
  43
  44   return 0;
  45 }