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filashkov

Untitled

Jan 5th, 2022
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C 3.29 KB | None | 0 0
  1. #include <stdio.h>
  2.  
  3. void
  4. my_test(const char* s, int arg1, int arg2, char arg3, short arg4, int arg5, int arg6)
  5. {
  6.     puts(s);
  7.     printf("%d\n", arg1);
  8.     printf("%d\n", arg2);
  9.     printf("%c\n", arg3);
  10.     printf("%d\n", arg4);
  11.     printf("%d\n", arg5);
  12.     printf("%d\n", arg6);
  13. }
  14.  
  15. int
  16. test_double(const char* s, double arg1, double arg2, double arg3, double arg4, double arg5, double arg6, double arg7, double arg8)
  17. {
  18.     //puts(s);
  19.    
  20.     printf("%lf\n", arg1);
  21.     /*printf("%lf\n", arg2);
  22.     printf("%lf\n", arg3);
  23.     printf("%lf\n", arg4);
  24.     printf("%lf\n", arg5);
  25.     printf("%lf\n", arg6);
  26.     printf("%lf\n", arg7);
  27.     printf("%lf\n", arg8);
  28.     */
  29.     return arg1 + arg8;
  30. }
  31.  
  32. int
  33. main()
  34. {
  35.     unsigned long long rax_value = 0;
  36.     //unsigned long long args[] = { (unsigned long long)printf, (unsigned long long)"Hi! %d %d %d %d %d %d\n", 1, 2, 3, 4, 5, 48 };
  37.     //unsigned long long args[] = { (unsigned long long)printf, (unsigned long long)"Hi! %d %d %d %d %d %lf\n", 1, 2, 3, 4, 5, (unsigned long long)((double)5.5) };
  38.     //unsigned long long args[] = { (unsigned long long)my_test, (unsigned long long)"Hi! %d %d %d %d %d %d\n", 1, 2, 3, 4, 5, 48 };
  39.     //unsigned long long args[] = { (unsigned long long)printf, (unsigned long long)"Hi! %d %d %d %d %d 1: %lf 2: %lf 3: %lf 4: %lf 5: %lf 6: %lf 7: %lf 8: %lf %lf %lf %lf %lf\n", 1, 2, 3, 4, 5, (unsigned long long)((double)5.5) };
  40.     //unsigned long long args[] = { (unsigned long long)test_double, (unsigned long long)"Hi! %d %d %d %d %d 1: %lf 2: %lf 3: %lf 4: %lf 5: %lf 6: %lf 7: %lf 8: %lf %lf %lf %lf %lf\n", 1, 2, 3, 4, 5, (unsigned long long)((double)5.5) };
  41.     //unsigned long long args[] = { 0, (unsigned long long)printf, (unsigned long long)"Hi! %d %d %d %d %d %d\n", 1, 2, 3, 4, 5, 48 };
  42.     unsigned long long args[] = { 0, (unsigned long long)printf, (unsigned long long)"Hi! %d %d %d %d %d %d %d %d %d %d %d %d %d %d\n", 1, 2, 3, 4, 5, 100, 77, 75, 48, 56, 64, 12, 75, 77 };
  43.  
  44.     long long additional_args_quantity = sizeof(args) / sizeof(*args) - 1 - 1 - 6;
  45.     if (additional_args_quantity < 0) {
  46.         additional_args_quantity = 0;
  47.     }
  48.     args[0] = additional_args_quantity; // Количество дополнительных аргументов, которые пойдут на стек
  49.     printf("args[0] = %llu\n", args[0]);
  50.     asm volatile(
  51.         "mov $0, %%rdi;"
  52.         "for_begin_label:"
  53.             "cmpq %%rdi, (%%rax);"
  54.                 "jna for_end_label;"
  55.                     "pushq 64(%%rax, %%rdi, 8);"
  56.                      //"pushq $42;"
  57.                     "add $1, %%rdi;"
  58.             "jmp for_begin_label;"
  59.         "for_end_label:"
  60.         //"mov %%rdi, %%rsi;"
  61.         "mov 16(%%rax), %%rdi;"
  62.         "movq 24(%%rax), %%rsi;"
  63.         "movq 32(%%rax), %%rdx;"
  64.         "movq 40(%%rax), %%rcx;"
  65.         "movq 48(%%rax), %%r8;"
  66.         "movq 56(%%rax), %%r9;"
  67.         "movq %%rax, %%rbx;"
  68.         "addq $8, %%rbx;"
  69.         "xor %%rax, %%rax;"
  70.         /*"notq %%mm0;"*/
  71.         /*"pcmpeqd %%xmm0, %%xmm0;"*/
  72.         "call *(%%rbx);"
  73.         "subq $8, %%rbx;"
  74.         "movq (%%rbx), %%rbx;"
  75.         "shlq $3, %%rbx;"
  76.         "add %%rbx, %%rsp"
  77.         : "=a"(rax_value)
  78.         : "a"(args)
  79.         : "rbx"
  80.     );
  81.     printf("Out: %lld\n", rax_value);
  82.     return 0;
  83. }
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