| 1 | #include <cinttypes> |
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| 2 | #include <cstdint> |
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| 3 | #include <cstdio> |
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| 4 | |
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| 5 | int main() { |
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| 6 | constexpr uint64_t fill = 0x0F0F0F0F0F0F0F0F; |
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| 7 | |
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| 8 | uint64_t rax, rbx, rcx, rdx, rsp, rbp, rsi, rdi; |
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| 9 | |
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| 10 | asm volatile( |
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| 11 | // save rsp & rbp |
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| 12 | "movq %%rsp, %4\n\t" |
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| 13 | "movq %%rbp, %5\n\t" |
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| 14 | "\n\t" |
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| 15 | "movq %8, %%rax\n\t" |
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| 16 | "movq %8, %%rbx\n\t" |
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| 17 | "movq %8, %%rcx\n\t" |
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| 18 | "movq %8, %%rdx\n\t" |
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| 19 | "movq %8, %%rsp\n\t" |
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| 20 | "movq %8, %%rbp\n\t" |
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| 21 | "movq %8, %%rsi\n\t" |
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| 22 | "movq %8, %%rdi\n\t" |
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| 23 | "\n\t" |
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| 24 | "int3\n\t" |
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| 25 | "\n\t" |
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| 26 | // swap saved & current rsp & rbp |
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| 27 | "xchgq %%rsp, %4\n\t" |
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| 28 | "xchgq %%rbp, %5\n\t" |
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| 29 | : "=a" (rax), "=b" (rbx), "=c" (rcx), "=d" (rdx), "=r" (rsp), "=r" (rbp), |
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| 30 | "=S" (rsi), "=D" (rdi) |
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| 31 | : "g" (fill) |
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| 32 | : |
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| 33 | ); |
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| 34 | |
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| 35 | printf(format: "rax = 0x%016" PRIx64 "\n" , rax); |
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| 36 | printf(format: "rbx = 0x%016" PRIx64 "\n" , rbx); |
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| 37 | printf(format: "rcx = 0x%016" PRIx64 "\n" , rcx); |
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| 38 | printf(format: "rdx = 0x%016" PRIx64 "\n" , rdx); |
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| 39 | printf(format: "rsp = 0x%016" PRIx64 "\n" , rsp); |
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| 40 | printf(format: "rbp = 0x%016" PRIx64 "\n" , rbp); |
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| 41 | printf(format: "rsi = 0x%016" PRIx64 "\n" , rsi); |
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| 42 | printf(format: "rdi = 0x%016" PRIx64 "\n" , rdi); |
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| 43 | |
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| 44 | return 0; |
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| 45 | } |
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| 46 | |
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