kernel/syscall.cpp


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#include <hilbert/kernel/application.hpp>
#include <hilbert/kernel/framebuffer.hpp>
#include <hilbert/kernel/syscall.hpp>
#include <hilbert/kernel/paging.hpp>

namespace hilbert::kernel::syscall {

  syscall_handler handlers[256];

  void init_syscalls() {
    for (int i = 0; i < 256; ++i)
      handlers[i] = 0;
  }

  void add_syscall(uint64_t rax, syscall_handler handler) {
    handlers[rax] = handler;
  }

}

using namespace hilbert::kernel::syscall;

extern "C" void do_syscall(
  uint64_t &rax, uint64_t &rdi, uint64_t &rsi, uint64_t &rdx
) {

  if (rax < 256 && handlers[rax] != 0)
    handlers[rax](rax, rdi, rsi, rdx);
  else {
    rax = 0;
    rdi = 0;
    rsi = 0;
    rdx = 0;
  }

}