/* * Copyright (c) 2021 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 *
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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#include <libsa/string.h>
#include <mach/vm_types.h>
#include <machine/static_if.h>

void
ml_static_if_entry_patch(static_if_entry_t sie, int branch)
{
	uint8_t insn[STATIC_IF_INSN_SIZE] = { 0x0F, 0x1F, 0x44, 0x00 };
	vm_offset_t patch_point = __static_if_entry_patch_point(sie);

	if (branch) {
		int32_t delta = (int32_t)(sie->sie_target -
		    (sie->sie_base + STATIC_IF_INSN_SIZE));
		insn[0] = 0xE9; /* jmp 32 */
		memcpy(insn + 1, &delta, sizeof(delta));
	}

	bcopy(insn, (void *)patch_point, STATIC_IF_INSN_SIZE);
}

void
ml_static_if_flush_icache(void)
{
}