arch/arm/core/aarch32/cortex_m/semihost.c

/*
 * Copyright (c) 2022, Commonwealth Scientific and Industrial Research
 * Organisation (CSIRO) ABN 41 687 119 230.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <zephyr/arch/common/semihost.h>

long semihost_exec(enum semihost_instr instr, void *args)
{
	register unsigned int r0 __asm__ ("r0") = instr;
	register void *r1 __asm__ ("r1") = args;
	register int ret __asm__ ("r0");

	__asm__ __volatile__ ("bkpt 0xab"
			      : "=r" (ret) : "r" (r0), "r" (r1) : "memory");
	return ret;
}