git: afd64316c869 - main - dtrace: Implement ustackdepth for arm64

The branch main has been updated by markj:

URL: https://cgit.FreeBSD.org/src/commit/?id=afd64316c869eb00dde4d6b4af61bca0cb2197f1

commit afd64316c869eb00dde4d6b4af61bca0cb2197f1
Author:     Mark Johnston <markj@FreeBSD.org>
AuthorDate: 2026-02-17 17:37:42 +0000
Commit:     Mark Johnston <markj@FreeBSD.org>
CommitDate: 2026-02-17 20:22:05 +0000

    dtrace: Implement ustackdepth for arm64
    
    MFC after:      2 weeks
    Differential Revision:  https://reviews.freebsd.org/D52475
---
 sys/cddl/dev/dtrace/aarch64/dtrace_isa.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/sys/cddl/dev/dtrace/aarch64/dtrace_isa.c b/sys/cddl/dev/dtrace/aarch64/dtrace_isa.c
index ff0e068006bd..037d4734659e 100644
--- a/sys/cddl/dev/dtrace/aarch64/dtrace_isa.c
+++ b/sys/cddl/dev/dtrace/aarch64/dtrace_isa.c
@@ -228,10 +228,22 @@ zero:
 int
 dtrace_getustackdepth(void)
 {
+	proc_t *p = curproc;
+	struct trapframe *tf;
+	uintptr_t pc, fp;
+	int n = 0;
 
-	printf("IMPLEMENT ME: %s\n", __func__);
+	if (p == NULL || (tf = curthread->td_frame) == NULL)
+		return (0);
+
+	if (DTRACE_CPUFLAG_ISSET(CPU_DTRACE_FAULT))
+		return (-1);
+
+	pc = tf->tf_elr;
+	fp = tf->tf_x[29];
+	n += dtrace_getustack_common(NULL, 0, pc, fp);
 
-	return (0);
+	return (n);
 }
 
 void