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/* ----------------------------------------------------------------------- *
*
* Copyright 2002-2008 H. Peter Anvin - All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, Inc., 53 Temple Place Ste 330,
* Boston MA 02111-1307, USA; either version 2 of the License, or
* (at your option) any later version; incorporated herein by reference.
*
* ----------------------------------------------------------------------- */
/*
* c32echo.c
*
* Simple COM32 program which only prints out its own command line
*/
#include <com32.h>
#define NULL ((void *)0)
static inline void memset(void *buf, int ch, unsigned int len)
{
asm volatile ("cld; rep; stosb":"+D" (buf), "+c"(len):"a"(ch):"memory");
}
int __start(void)
{
com32sys_t inreg;
const char *p;
memset(&inreg, 0, sizeof inreg);
inreg.eax.b[1] = 0x02; /* Write Character */
for (p = __com32.cs_cmdline; *p; p++) {
inreg.edx.b[0] = *p;
__com32.cs_intcall(0x21, &inreg, NULL);
}
inreg.edx.b[0] = '\r';
__com32.cs_intcall(0x21, &inreg, NULL);
inreg.edx.b[0] = '\n';
__com32.cs_intcall(0x21, &inreg, NULL);
return 0;
}
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