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 31#include <machine/asmacros.h> 32 33#include "assym.inc" 34 35 .text 36ENTRY(efi_rt_arch_call) 37 pushq %rbp 38 movq %rsp, %rbp 39 40 movq %rbx, EC_RBX(%rdi) 41 movq %rsp, EC_RSP(%rdi) 42 movq %rbp, EC_RBP(%rdi) 43 movq %r12, EC_R12(%rdi) 44 movq %r13, EC_R13(%rdi) 45 movq %r14, EC_R14(%rdi) 46 movq %r15, EC_R15(%rdi) 47 pushfq 48 popq %rax 49 movq %rax, EC_RFLAGS(%rdi) 50 movq PCPU(CURTHREAD), %rax 51 movq %rdi, TD_MD+MD_EFIRT_TMP(%rax) 52 movq PCPU(CURPCB), %rsi 53 54 movl EC_ARGCNT(%rdi), %ecx 55 movl %ecx, %ebx 56 movl $4, %eax 57 cmpl %eax, %ecx 58 cmovbl %eax, %ecx 59 shll $3, %ecx 60 subq %rcx, %rsp 61 62 cmpl $0, %ebx 63 jz 1f 64 movq EC_ARG1(%rdi), %rcx 65 decl %ebx 66 jz 1f 67 movq EC_ARG2(%rdi), %rdx 68 decl %ebx 69 jz 1f 70 movq EC_ARG3(%rdi), %r8 71 decl %ebx 72 jz 1f 73 movq EC_ARG4(%rdi), %r9 74 decl %ebx 75 jz 1f 76 movq EC_ARG5(%rdi), %rax 77 movq %rax, 4*8(%rsp) 78 decl %ebx 79 jz 1f 80 movq $efi_rt_panic_str, %rdi 81 call panic 821: movq EC_FPTR(%rdi), %rax 83 movq $efi_rt_fault, PCB_ONFAULT(%rsi) 84 callq *%rax 85 86 movq PCPU(CURTHREAD), %rbx 87 movq TD_MD+MD_EFIRT_TMP(%rbx), %rdi 88 movq %rax, EC_EFI_STATUS(%rdi) 89 movq PCPU(CURPCB), %rsi 90 xorl %eax, %eax 91 movq %rax, PCB_ONFAULT(%rsi) 92 93efi_rt_arch_call_tail: 94 movq EC_R15(%rdi), %r15 95 movq EC_R14(%rdi), %r14 96 movq EC_R13(%rdi), %r13 97 movq EC_R12(%rdi), %r12 98 movq EC_RBP(%rdi), %rbp 99 movq EC_RSP(%rdi), %rsp 100 movq EC_RBX(%rdi), %rbx 101 pushq EC_RFLAGS(%rdi) 102 popfq 103 104 popq %rbp 105 ret 106END(efi_rt_arch_call) 107 108ENTRY(efi_rt_fault) 109 xorl %eax, %eax 110 movq PCPU(CURPCB), %rsi 111 movq %rax, PCB_ONFAULT(%rsi) 112 movl $EFAULT, %eax 113 movq PCPU(CURTHREAD), %rbx 114 movq TD_MD+MD_EFIRT_TMP(%rbx), %rdi 115 jmp efi_rt_arch_call_tail 116END(efi_rt_fault) 117 118efi_rt_panic_str: .asciz "efi_rt_arch_call: too many args" 119