view lldbg/cmd_w16.c @ 40:b56928f8c001

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author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 07 May 2017 16:20:07 +0000
parents 75a11d740a02
children
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/*
 * w16 hexaddr xxxx -- write a 16-bit register or memory location
 */

#include <sys/types.h>
#include "types.h"

void
lldbg_cmd_w16(argbulk)
	char *argbulk;
{
	char *argv[3];
	u_long addr, data;

	if (lldbg_parse_args(argbulk, 2, 2, argv, 0) < 0)
		return;
	if (lldbg_parse_hexarg(argv[0], 8, &addr) < 0) {
	      lldbg_printf("ERROR: arg1 must be a valid 32-bit hex address\n");
		return;
	}
	if (addr & 1) {
		lldbg_printf("ERROR: unaligned address\n");
		return;
	}
	if (lldbg_parse_hexarg(argv[1], 4, &data) < 0) {
		lldbg_printf("ERROR: arg2 must be a valid 16-bit hex value\n");
		return;
	}
	*(volatile u16 *)addr = data;
}