LXR qemu/tests/tcg/aarch64/system/semiconsole.c

   1/*
   2 * Semihosting Console Test
   3 *
   4 * Copyright (c) 2019 Linaro Ltd
   5 *
   6 * SPDX-License-Identifier: GPL-2.0-or-later
   7 */
   8
   9#include <inttypes.h>
  10#include <minilib.h>
  11
  12#define SYS_READC 0x7
  13
  14uintptr_t __semi_call(uintptr_t type, uintptr_t arg0)
  15{
  16    register uintptr_t t asm("x0") = type;
  17    register uintptr_t a0 asm("x1") = arg0;
  18    asm("hlt 0xf000"
  19        : "=r" (t)
  20        : "r" (t), "r" (a0));
  21
  22    return t;
  23}
  24
  25int main(void)
  26{
  27    char c;
  28
  29    ml_printf("Semihosting Console Test\n");
  30    ml_printf("hit X to exit:");
  31
  32    do {
  33        c = __semi_call(SYS_READC, 0);
  34        __sys_outc(c);
  35    } while (c != 'X');
  36
  37    return 0;
  38}
  39