[PATCH 21/23] Add setup_sigframe_arch function for ARM AArch64 in bsd-user

[Ajeet Singh <itachis6234@gmail.com>]

From: Warner Losh <imp@bsdimp.com>

The function utilizes the `get_mcontext` function to retrieve the machine
context for the current CPUARMState

Signed-off-by: Warner Losh <imp@bsdimp.com>
Signed-off-by: Ajeet Singh <itachis@FreeBSD.org>
---
 bsd-user/aarch64/signal.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/bsd-user/aarch64/signal.c b/bsd-user/aarch64/signal.c
index ab3bf8558a..43c886e603 100644
--- a/bsd-user/aarch64/signal.c
+++ b/bsd-user/aarch64/signal.c
@@ -81,3 +81,17 @@ abi_long get_mcontext(CPUARMState *regs, target_mcontext_t *mcp, int flags)
 
     return err;
 }
+
+/*
+ * Compare to arm64/arm64/exec_machdep.c sendsig()
+ * Assumes that the memory is locked if frame points to user memory.
+ */
+abi_long setup_sigframe_arch(CPUARMState *env, abi_ulong frame_addr,
+                             struct target_sigframe *frame, int flags)
+{
+    target_mcontext_t *mcp = &frame->sf_uc.uc_mcontext;
+
+    get_mcontext(env, mcp, flags);
+    return 0;
+}
+
-- 
2.34.1