git: b04e157ce9ea - stable/13 - linux: Implement linux_to_bsd_regset() on arm64

The branch stable/13 has been updated by dchagin:

URL: https://cgit.FreeBSD.org/src/commit/?id=b04e157ce9eaea73d9aca3840d3d8db9c2c8ba32

commit b04e157ce9eaea73d9aca3840d3d8db9c2c8ba32
Author:     Edward Tomasz Napierala <trasz@FreeBSD.org>
AuthorDate: 2021-11-06 08:35:04 +0000
Commit:     Dmitry Chagin <dchagin@FreeBSD.org>
CommitDate: 2022-06-17 19:33:36 +0000

    linux: Implement linux_to_bsd_regset() on arm64
    
    This will be used by ptrace.
    
    Sponsored By:   EPSRC
    
    (cherry picked from commit 6f397bc0fbe378664bbbc7c2296043e3b9673e2a)
---
 sys/arm64/linux/linux.h         |  2 ++
 sys/arm64/linux/linux_machdep.c | 13 +++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/sys/arm64/linux/linux.h b/sys/arm64/linux/linux.h
index 5e4bf3ae0680..05e5bd189b36 100644
--- a/sys/arm64/linux/linux.h
+++ b/sys/arm64/linux/linux.h
@@ -324,5 +324,7 @@ struct reg;
 
 void	bsd_to_linux_regset(const struct reg *b_reg,
 	    struct linux_pt_regset *l_regset);
+void	linux_to_bsd_regset(struct reg *b_reg,
+	    const struct linux_pt_regset *l_regset);
 
 #endif /* _ARM64_LINUX_H_ */
diff --git a/sys/arm64/linux/linux_machdep.c b/sys/arm64/linux/linux_machdep.c
index 9172b10a5876..746c93bb86c8 100644
--- a/sys/arm64/linux/linux_machdep.c
+++ b/sys/arm64/linux/linux_machdep.c
@@ -147,3 +147,16 @@ bsd_to_linux_regset(const struct reg *b_reg, struct linux_pt_regset *l_regset)
 	l_regset->pc = b_reg->elr;
 	l_regset->cpsr = b_reg->spsr;
 }
+
+void
+linux_to_bsd_regset(struct reg *b_reg, const struct linux_pt_regset *l_regset)
+{
+
+	KASSERT(sizeof(l_regset->x) == sizeof(b_reg->x) + sizeof(l_ulong),
+	    ("%s: size mismatch\n", __func__));
+
+	memcpy(b_reg->x, l_regset->x, sizeof(b_reg->x));
+	b_reg->sp = l_regset->sp;
+	b_reg->elr = l_regset->pc;
+	b_reg->spsr = l_regset->cpsr;
+}