1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2015-2022 Dmitry Chagin <dchagin@freeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD$
28 */
29
30 #include "linux_assym.h" /* system definitions */
31 #include <machine/asmacros.h> /* miscellaneous asm macros */
32
33 #include <amd64/linux/linux_syscall.h> /* system call numbers */
34
35 .data
36
37 .globl linux_platform
38 linux_platform:
39 .asciz "x86_64"
40
41 .text
42
43 ENTRY(linux_rt_sigcode)
44 .cfi_startproc
45 .cfi_signal_frame
46 .cfi_def_cfa %rsp, LINUX_RT_SIGF_SC
47 .cfi_offset %r8, L_SC_R8
48 .cfi_offset %r9, L_SC_R9
49 .cfi_offset %r10, L_SC_R10
50 .cfi_offset %r11, L_SC_R11
51 .cfi_offset %r12, L_SC_R12
52 .cfi_offset %r13, L_SC_R13
53 .cfi_offset %r14, L_SC_R14
54 .cfi_offset %r15, L_SC_R15
55 .cfi_offset %rdi, L_SC_RDI
56 .cfi_offset %rsi, L_SC_RSI
57 .cfi_offset %rbp, L_SC_RBP
58 .cfi_offset %rbx, L_SC_RBX
59 .cfi_offset %rdx, L_SC_RDX
60 .cfi_offset %rax, L_SC_RAX
61 .cfi_offset %rcx, L_SC_RCX
62 .cfi_offset %rip, L_SC_RIP
63 .cfi_offset 49, L_SC_RFLAGS
64 .cfi_offset %cs, L_SC_CS
65 .cfi_offset %rsp, L_SC_RSP
66
67 movq %rsp, %rbx /* rt_sigframe for rt_sigreturn */
68 call *%rcx /* call signal handler */
69 movq $LINUX_SYS_linux_rt_sigreturn, %rax
70 syscall
71 0: hlt
72 jmp 0b
73 .cfi_endproc
74 END(linux_rt_sigcode)
75
76 #if 0
77 .section .note.Linux, "a",@note
78 .long 2f - 1f /* namesz */
79 .balign 4
80 .long 4f - 3f /* descsz */
81 .long 0
82 1:
83 .asciz "Linux"
84 2:
85 .balign 4
86 3:
87 .long LINUX_VERSION_CODE
88 4:
89 .balign 4
90 .previous
91 #endif
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