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  1. long
  2. system_call(long number,
  3.             long _1, long _2, long _3, long _4, long _5, long _6)
  4. {
  5.     long value;
  6.  
  7.     register long r10 __asm__ ("r10") = _4;
  8.     register long r8  __asm__ ("r8")  = _5;
  9.     register long r9  __asm__ ("r9")  = _6;
  10.  
  11.     __asm__ volatile ( "syscall"
  12.                      : "=a" (value)
  13.                      : "a" (number), "D" (_1), "S" (_2), "d" (_3), "r" (r10), "r" (r8), "r" (r9)
  14.                      : "rcx", "r11", "cc", "memory");
  15.  
  16.     return value;
  17. }
  18.  
  19. int main(void) {
  20.     static const char message[] = "It works!" "\n";
  21.  
  22.     /* system_call(write, standard_output, ...); */
  23.     system_call(1, 1, message, sizeof message, 0, 0, 0);
  24.  
  25.     return 0;
  26. }
Success #stdin #stdout 0s 9296KB
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stdin
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Standard input is empty
stdout
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It works!
https://ideone.com/RqZtjl
language:
C (clang 8.0)
created:
7 years ago
visibility:
public

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