1/*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2018 The FreeBSD Foundation 5 * All rights reserved. 6 * 7 * This software was developed by Konstantin Belousov <kib@FreeBSD.org> 8 * under sponsorship from the FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD$ 32 */ 33 34#include <machine/asmacros.h> 35 36#include "assym.inc" 37 38 .text 39ENTRY(efi_rt_arch_call) 40 pushq %rbp 41 movq %rsp, %rbp 42 43 movq %rbx, EC_RBX(%rdi) 44 movq %rsp, EC_RSP(%rdi) 45 movq %rbp, EC_RBP(%rdi) 46 movq %r12, EC_R12(%rdi) 47 movq %r13, EC_R13(%rdi) 48 movq %r14, EC_R14(%rdi) 49 movq %r15, EC_R15(%rdi) 50 pushfq 51 popq %rax 52 movq %rax, EC_RFLAGS(%rdi) 53 movq PCPU(CURTHREAD), %rax 54 movq %rdi, TD_MD+MD_EFIRT_TMP(%rax) 55 movq PCPU(CURPCB), %rsi 56 57 movl EC_ARGCNT(%rdi), %ecx 58 movl %ecx, %ebx 59 movl $4, %eax 60 cmpl %eax, %ecx 61 cmovbl %eax, %ecx 62 shll $3, %ecx 63 subq %rcx, %rsp 64 65 cmpl $0, %ebx 66 jz 1f 67 movq EC_ARG1(%rdi), %rcx 68 decl %ebx 69 jz 1f 70 movq EC_ARG2(%rdi), %rdx 71 decl %ebx 72 jz 1f 73 movq EC_ARG3(%rdi), %r8 74 decl %ebx 75 jz 1f 76 movq EC_ARG4(%rdi), %r9 77 decl %ebx 78 jz 1f 79 movq EC_ARG5(%rdi), %rax 80 movq %rax, 4*8(%rsp) 81 decl %ebx 82 jz 1f 83 movq $efi_rt_panic_str, %rdi 84 call panic 851: movq EC_FPTR(%rdi), %rax 86 movq $efi_rt_fault, PCB_ONFAULT(%rsi) 87 callq *%rax 88 89 movq PCPU(CURTHREAD), %rbx 90 movq TD_MD+MD_EFIRT_TMP(%rbx), %rdi 91 movq %rax, EC_EFI_STATUS(%rdi) 92 movq PCPU(CURPCB), %rsi 93 xorl %eax, %eax 94 movq %rax, PCB_ONFAULT(%rsi) 95 96efi_rt_arch_call_tail: 97 movq EC_R15(%rdi), %r15 98 movq EC_R14(%rdi), %r14 99 movq EC_R13(%rdi), %r13 100 movq EC_R12(%rdi), %r12 101 movq EC_RBP(%rdi), %rbp 102 movq EC_RSP(%rdi), %rsp 103 movq EC_RBX(%rdi), %rbx 104 pushq EC_RFLAGS(%rdi) 105 popfq 106 107 popq %rbp 108 ret 109END(efi_rt_arch_call) 110 111ENTRY(efi_rt_fault) 112 xorl %eax, %eax 113 movq PCPU(CURPCB), %rsi 114 movq %rax, PCB_ONFAULT(%rsi) 115 movl $EFAULT, %eax 116 movq PCPU(CURTHREAD), %rbx 117 movq TD_MD+MD_EFIRT_TMP(%rbx), %rdi 118 jmp efi_rt_arch_call_tail 119END(efi_rt_fault) 120 121efi_rt_panic_str: .asciz "efi_rt_arch_call: too many args" 122