git: fd443b71fa2e - stable/14 - libc/aarch64: Copy the trivial getcontextx

The branch stable/14 has been updated by andrew:

URL: https://cgit.FreeBSD.org/src/commit/?id=fd443b71fa2eda2a125856acb446dd3cc72e053c

commit fd443b71fa2eda2a125856acb446dd3cc72e053c
Author:     Andrew Turner <andrew@FreeBSD.org>
AuthorDate: 2024-02-28 16:09:17 +0000
Commit:     Andrew Turner <andrew@FreeBSD.org>
CommitDate: 2024-09-02 08:44:29 +0000

    libc/aarch64: Copy the trivial getcontextx
    
    This will be used as the base of a non-trivial implementation.
    
    Reviewed by:    kib
    Sponsored by:   Arm Ltd
    Differential Revision:  https://reviews.freebsd.org/D44254
    
    (cherry picked from commit fd6b1cc34e4175c1e223f42540debb74cfe3c3e6)
---
 lib/libc/aarch64/gen/Makefile.inc  |  4 +--
 lib/libc/aarch64/gen/getcontextx.c | 73 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 75 insertions(+), 2 deletions(-)

diff --git a/lib/libc/aarch64/gen/Makefile.inc b/lib/libc/aarch64/gen/Makefile.inc
index 5e4fccf143e4..4f4fb3d199bf 100644
--- a/lib/libc/aarch64/gen/Makefile.inc
+++ b/lib/libc/aarch64/gen/Makefile.inc
@@ -6,10 +6,10 @@ SRCS+=	_ctx_start.S \
 	flt_rounds.c \
 	fpgetmask.c \
 	fpsetmask.c \
+	getcontextx.c \
 	infinity.c \
 	ldexp.c \
 	makecontext.c \
 	_setjmp.S \
 	setjmp.S \
-	sigsetjmp.S \
-	trivial-getcontextx.c
+	sigsetjmp.S
diff --git a/lib/libc/aarch64/gen/getcontextx.c b/lib/libc/aarch64/gen/getcontextx.c
new file mode 100644
index 000000000000..b9d4522d96ee
--- /dev/null
+++ b/lib/libc/aarch64/gen/getcontextx.c
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2011 Konstantin Belousov <kib@FreeBSD.org>
+ * All rights reserved.
+ *
+ * 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 ``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 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 <sys/types.h>
+#include <sys/ucontext.h>
+#include <errno.h>
+#include <stdlib.h>
+
+int
+__getcontextx_size(void)
+{
+
+	return (sizeof(ucontext_t));
+}
+
+int
+__fillcontextx2(char *ctx)
+{
+
+	return (0);
+}
+
+int
+__fillcontextx(char *ctx)
+{
+	ucontext_t *ucp;
+
+	ucp = (ucontext_t *)ctx;
+	return (getcontext(ucp));
+}
+
+__weak_reference(__getcontextx, getcontextx);
+
+ucontext_t *
+__getcontextx(void)
+{
+	char *ctx;
+	int error;
+
+	ctx = malloc(__getcontextx_size());
+	if (ctx == NULL)
+		return (NULL);
+	if (__fillcontextx(ctx) == -1) {
+		error = errno;
+		free(ctx);
+		errno = error;
+		return (NULL);
+	}
+	return ((ucontext_t *)ctx);
+}