git: 6f397bc0fbe3 - main - linux: Implement linux_to_bsd_regset() on arm64

[Edward Tomasz Napierala]

The branch main has been updated by trasz:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=6f397bc0fbe378664bbbc7c2296043e3b9673e2a

commit 6f397bc0fbe378664bbbc7c2296043e3b9673e2a
Author:     Edward Tomasz Napierala <tr...@freebsd.org>
AuthorDate: 2021-11-06 08:35:04 +0000
Commit:     Edward Tomasz Napierala <tr...@freebsd.org>
CommitDate: 2021-11-06 08:35:04 +0000

    linux: Implement linux_to_bsd_regset() on arm64
    
    This will be used by ptrace.
    
    Sponsored By:   EPSRC
---
 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 c874f86a5f0c..0bcc05ff06de 100644
--- a/sys/arm64/linux/linux_machdep.c
+++ b/sys/arm64/linux/linux_machdep.c
@@ -145,3 +145,16 @@ 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;
+}