Function db_write_bytes

freebsd/mips/mips/db_interface.c:184–228

}

int
db_write_bytes(vm_offset_t addr, size_t size, char *data)
{
	int ret;
	jmp_buf jb;
	void *prev_jb;

	prev_jb = kdb_jmpbuf(jb);
	ret = setjmp(jb);

	if (ret == 0) {
		/*
		 * 'addr' could be a memory-mapped I/O address.  Try to
		 * do atomic load/store in unit of size requested.
		 * size == 8 is only atomic on 64bit or n32 kernel.
		 */
		if ((size == 2 || size == 4 || size == 8) &&
		    ((addr & (size -1)) == 0) &&
		    (((vm_offset_t)data & (size -1)) == 0)) {
			switch (size) {
			case 2:
				*(uint16_t *)addr = *(uint16_t *)data;
				break;
			case 4:
				*(uint32_t *)addr = *(uint32_t *)data;
				break;
			case 8:
				*(uint64_t *)addr = *(uint64_t *)data;
				break;
			}
		} else {
			char *dst;
			size_t len = size;

			dst = (char *)addr;
			while (len-- > 0)
				*dst++ = *data++;
		}

		mips_icache_sync_range((db_addr_t) addr, size);
		mips_dcache_wbinv_range((db_addr_t) addr, size);
	}
	(void)kdb_jmpbuf(prev_jb);
	return (ret);
}

/*
 *	To do a single step ddb needs to know the next address