git: dfe221502f45 - stable/13 - Extract the arm64 signal code to a new file

The branch stable/13 has been updated by andrew:

URL: https://cgit.FreeBSD.org/src/commit/?id=dfe221502f45d5d9a31490be4ec7dfa44092d3db

commit dfe221502f45d5d9a31490be4ec7dfa44092d3db
Author:     Andrew Turner <andrew@FreeBSD.org>
AuthorDate: 2021-12-14 18:05:29 +0000
Commit:     Andrew Turner <andrew@FreeBSD.org>
CommitDate: 2022-01-10 10:54:19 +0000

    Extract the arm64 signal code to a new file
    
    This will be used by the vdso signal trampoline on arm64.
    
    While here fix the license as this part of locore.S to correct the
    copyright owner.
    
    Sponsored by:   The FreeBSD Foundation
    
    (cherry picked from commit 8ddb4b9b6668f88acc70042923384383247340dc)
---
 sys/arm64/arm64/locore.S   | 25 +--------------------
 sys/arm64/arm64/sigtramp.S | 55 ++++++++++++++++++++++++++++++++++++++++++++++
 sys/conf/files.arm64       |  1 +
 3 files changed, 57 insertions(+), 24 deletions(-)

diff --git a/sys/arm64/arm64/locore.S b/sys/arm64/arm64/locore.S
index d906128ae9dc..64067ac31c8f 100644
--- a/sys/arm64/arm64/locore.S
+++ b/sys/arm64/arm64/locore.S
@@ -809,30 +809,7 @@ initstack:
 initstack_end:
 
 
-ENTRY(sigcode)
-	mov	x0, sp
-	add	x0, x0, #SF_UC
-
-1:
-	mov	x8, #SYS_sigreturn
-	svc	0
-
-	/* sigreturn failed, exit */
-	mov	x8, #SYS_exit
-	svc	0
-
-	b	1b
-END(sigcode)
-	/* This may be copied to the stack, keep it 16-byte aligned */
-	.align	3
-esigcode:
-
-	.data
-	.align	3
-	.global	szsigcode
-szsigcode:
-	.quad	esigcode - sigcode
-
+.text
 EENTRY(aarch32_sigcode)
 	.word 0xe1a0000d	// mov r0, sp
 	.word 0xe2800040	// add r0, r0, #SIGF_UC
diff --git a/sys/arm64/arm64/sigtramp.S b/sys/arm64/arm64/sigtramp.S
new file mode 100644
index 000000000000..b06ec6fa109c
--- /dev/null
+++ b/sys/arm64/arm64/sigtramp.S
@@ -0,0 +1,55 @@
+/*-
+ * Copyright (c) 2014 The FreeBSD Foundation
+ *
+ * This software was developed by Andrew Turner under sponsorship from
+ * the FreeBSD Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "assym.inc"
+#include <sys/syscall.h>
+#include <machine/asm.h>
+
+ENTRY(sigcode)
+	mov	x0, sp
+	add	x0, x0, #SF_UC
+
+1:
+	mov	x8, #SYS_sigreturn
+	svc	0
+
+	/* sigreturn failed, exit */
+	mov	x8, #SYS_exit
+	svc	0
+
+	b	1b
+END(sigcode)
+	/* This may be copied to the stack, keep it 16-byte aligned */
+	.align	3
+esigcode:
+
+	.data
+	.align	3
+	.global	szsigcode
+szsigcode:
+	.quad	esigcode - sigcode
diff --git a/sys/conf/files.arm64 b/sys/conf/files.arm64
index c855d908bfc9..df7eb81aeac5 100644
--- a/sys/conf/files.arm64
+++ b/sys/conf/files.arm64
@@ -68,6 +68,7 @@ arm64/arm64/nexus.c				standard
 arm64/arm64/ofw_machdep.c			optional fdt
 arm64/arm64/pmap.c				standard
 arm64/arm64/ptrace_machdep.c			standard
+arm64/arm64/sigtramp.S				standard
 arm64/arm64/stack_machdep.c			optional ddb | stack
 arm64/arm64/support.S				standard
 arm64/arm64/swtch.S				standard