| 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(format: "rax = 0x%016"PRIx64 "\n", rax); |
| 36 | printf(format: "rbx = 0x%016"PRIx64 "\n", rbx); |
| 37 | printf(format: "rcx = 0x%016"PRIx64 "\n", rcx); |
| 38 | printf(format: "rdx = 0x%016"PRIx64 "\n", rdx); |
| 39 | printf(format: "rsp = 0x%016"PRIx64 "\n", rsp); |
| 40 | printf(format: "rbp = 0x%016"PRIx64 "\n", rbp); |
| 41 | printf(format: "rsi = 0x%016"PRIx64 "\n", rsi); |
| 42 | printf(format: "rdi = 0x%016"PRIx64 "\n", rdi); |
| 43 | |
| 44 | return 0; |
| 45 | } |
| 46 |