[src/trunk]: src/sys/arch/aarch64/aarch64 don't depend on clang code to backt...

[ryo <ryo%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/e18f276a76bd
branches:  trunk
changeset: 363503:e18f276a76bd
user:      ryo <ryo%NetBSD.org@localhost>
date:      Mon Jul 30 15:59:44 2018 +0000

description:
don't depend on clang code to backtrace. keep trapframe as framepointer if DDB.

diffstat:

 sys/arch/aarch64/aarch64/db_trace.c |  6 +++---
 sys/arch/aarch64/aarch64/vectors.S  |  6 +++++-
 2 files changed, 8 insertions(+), 4 deletions(-)

diffs (50 lines):

diff -r 1de958ed56dc -r e18f276a76bd sys/arch/aarch64/aarch64/db_trace.c
--- a/sys/arch/aarch64/aarch64/db_trace.c       Mon Jul 30 09:08:41 2018 +0000
+++ b/sys/arch/aarch64/aarch64/db_trace.c       Mon Jul 30 15:59:44 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: db_trace.c,v 1.3 2018/07/17 00:31:22 christos Exp $ */
+/* $NetBSD: db_trace.c,v 1.4 2018/07/30 15:59:44 ryo Exp $ */
 
 /*
  * Copyright (c) 2017 Ryo Shimizu <ryo%nerv.org@localhost>
@@ -28,7 +28,7 @@
 
 #include <sys/cdefs.h>
 
-__KERNEL_RCSID(0, "$NetBSD: db_trace.c,v 1.3 2018/07/17 00:31:22 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: db_trace.c,v 1.4 2018/07/30 15:59:44 ryo Exp $");
 
 #include <sys/param.h>
 #include <sys/proc.h>
@@ -248,7 +248,7 @@
                if (((char *)(lr - 4) == (char *)el0_trap) ||
                    ((char *)(lr - 4) == (char *)el1_trap)) {
 
-                       tf = (struct trapframe *)(lastfp + 16);
+                       tf = (struct trapframe *)fp;
 
                        lastfp = (uint64_t)tf;
                        lastlr = lr;
diff -r 1de958ed56dc -r e18f276a76bd sys/arch/aarch64/aarch64/vectors.S
--- a/sys/arch/aarch64/aarch64/vectors.S        Mon Jul 30 09:08:41 2018 +0000
+++ b/sys/arch/aarch64/aarch64/vectors.S        Mon Jul 30 15:59:44 2018 +0000
@@ -1,7 +1,8 @@
-/*     $NetBSD: vectors.S,v 1.6 2018/07/17 10:01:59 ryo Exp $  */
+/*     $NetBSD: vectors.S,v 1.7 2018/07/30 15:59:44 ryo Exp $  */
 
 #include <aarch64/asm.h>
 #include "assym.h"
+#include "opt_ddb.h"
 
        /*
         * vector_entry macro must be small enough to fit 0x80 bytes!
@@ -69,6 +70,9 @@
 
        adr     x30, el\el\()_trap_exit /* el[01]_trap_exit */
        mov     x0, sp
+#ifdef DDB
+       mov     x29, sp                 /* for backtrace */
+#endif
        b       \label
        .endm