1/*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2018 The FreeBSD Foundation 5 * 6 * This software was developed by Konstantin Belousov <kib@FreeBSD.org> 7 * under sponsorship from the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD$ 31 */ 32 33#include <machine/asmacros.h> 34 35#include "assym.inc" 36 37 .text 38ENTRY(efi_rt_arch_call) 39 pushq %rbp 40 movq %rsp, %rbp 41 42 movq %rbx, EC_RBX(%rdi) 43 movq %rsp, EC_RSP(%rdi) 44 movq %rbp, EC_RBP(%rdi) 45 movq %r12, EC_R12(%rdi) 46 movq %r13, EC_R13(%rdi) 47 movq %r14, EC_R14(%rdi) 48 movq %r15, EC_R15(%rdi) 49 pushfq 50 popq %rax 51 movq %rax, EC_RFLAGS(%rdi) 52 movq PCPU(CURTHREAD), %rax 53 movq %rdi, TD_MD+MD_EFIRT_TMP(%rax) 54 movq PCPU(CURPCB), %rsi 55 56 movl EC_ARGCNT(%rdi), %ecx 57 movl %ecx, %ebx 58 movl $4, %eax 59 cmpl %eax, %ecx 60 cmovbl %eax, %ecx 61 shll $3, %ecx 62 subq %rcx, %rsp 63 64 cmpl $0, %ebx 65 jz 1f 66 movq EC_ARG1(%rdi), %rcx 67 decl %ebx 68 jz 1f 69 movq EC_ARG2(%rdi), %rdx 70 decl %ebx 71 jz 1f 72 movq EC_ARG3(%rdi), %r8 73 decl %ebx 74 jz 1f 75 movq EC_ARG4(%rdi), %r9 76 decl %ebx 77 jz 1f 78 movq EC_ARG5(%rdi), %rax 79 movq %rax, 4*8(%rsp) 80 decl %ebx 81 jz 1f 82 movq $efi_rt_panic_str, %rdi 83 call panic 841: movq EC_FPTR(%rdi), %rax 85 movq $efi_rt_fault, PCB_ONFAULT(%rsi) 86 callq *%rax 87 88 movq PCPU(CURTHREAD), %rbx 89 movq TD_MD+MD_EFIRT_TMP(%rbx), %rdi 90 movq %rax, EC_EFI_STATUS(%rdi) 91 movq PCPU(CURPCB), %rsi 92 xorl %eax, %eax 93 movq %rax, PCB_ONFAULT(%rsi) 94 95efi_rt_arch_call_tail: 96 movq EC_R15(%rdi), %r15 97 movq EC_R14(%rdi), %r14 98 movq EC_R13(%rdi), %r13 99 movq EC_R12(%rdi), %r12 100 movq EC_RBP(%rdi), %rbp 101 movq EC_RSP(%rdi), %rsp 102 movq EC_RBX(%rdi), %rbx 103 pushq EC_RFLAGS(%rdi) 104 popfq 105 106 popq %rbp 107 ret 108END(efi_rt_arch_call) 109 110ENTRY(efi_rt_fault) 111 xorl %eax, %eax 112 movq PCPU(CURPCB), %rsi 113 movq %rax, PCB_ONFAULT(%rsi) 114 movl $EFAULT, %eax 115 movq PCPU(CURTHREAD), %rbx 116 movq TD_MD+MD_EFIRT_TMP(%rbx), %rdi 117 jmp efi_rt_arch_call_tail 118END(efi_rt_fault) 119 120efi_rt_panic_str: .asciz "efi_rt_arch_call: too many args" 121