[src/trunk]: src/sys/arch/mips/mips Allow disassembly in XKSEG for LP64 kerne...

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

details:   https://anonhg.NetBSD.org/src/rev/549fae8d38a5
branches:  trunk
changeset: 954326:549fae8d38a5
user:      simonb <simonb%NetBSD.org@localhost>
date:      Mon Apr 05 06:35:04 2021 +0000

description:
Allow disassembly in XKSEG for LP64 kernels.  Can now x/i on modules
with an N64 kernel.

diffstat:

 sys/arch/mips/mips/db_disasm.c |  14 ++++++++++----
 1 files changed, 10 insertions(+), 4 deletions(-)

diffs (43 lines):

diff -r ff36889fd892 -r 549fae8d38a5 sys/arch/mips/mips/db_disasm.c
--- a/sys/arch/mips/mips/db_disasm.c    Mon Apr 05 06:28:31 2021 +0000
+++ b/sys/arch/mips/mips/db_disasm.c    Mon Apr 05 06:35:04 2021 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: db_disasm.c,v 1.35 2021/04/05 06:28:31 simonb Exp $    */
+/*     $NetBSD: db_disasm.c,v 1.36 2021/04/05 06:35:04 simonb Exp $    */
 
 /*-
  * Copyright (c) 1991, 1993
@@ -35,7 +35,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: db_disasm.c,v 1.35 2021/04/05 06:28:31 simonb Exp $");
+__KERNEL_RCSID(0, "$NetBSD: db_disasm.c,v 1.36 2021/04/05 06:35:04 simonb Exp $");
 
 #include <sys/param.h>
 #include <sys/cpu.h>
@@ -218,6 +218,11 @@
  * "next instruction" does NOT mean the next instruction to
  * be executed but the 'linear' next instruction.
  */
+#ifdef _LP64
+#define        DISASM_KERN_START       MIPS_XKSEG_START
+#else
+#define        DISASM_KERN_START       MIPS_KSEG0_START
+#endif
 db_addr_t
 db_disasm(db_addr_t loc, bool altfmt)
 {
@@ -225,9 +230,10 @@
 
        /*
         * Take some care with addresses to not UTLB here as it
-        * loses the current debugging context.  KSEG2 not checked.
+        * loses the current debugging context.  KSEG2 and XKSEG
+        * are not checked.
         */
-       if (loc < (db_addr_t)MIPS_KSEG0_START) {
+       if (loc < (db_addr_t)DISASM_KERN_START) {
 #ifdef _KERNEL
                if (ufetch_32((void *)loc, &instr) != 0) {
                        db_printf("invalid address.\n");