[src/trunk]: src/sys/kern create an nmap table for module symtabs too.

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

details:   https://anonhg.NetBSD.org/src/rev/fde0c6d1560d
branches:  trunk
changeset: 354365:fde0c6d1560d
user:      chs <chs%NetBSD.org@localhost>
date:      Wed Jun 14 00:52:37 2017 +0000

description:
create an nmap table for module symtabs too.
needed by dtrace.

diffstat:

 sys/kern/kern_ksyms.c |  19 ++++++++++++++-----
 1 files changed, 14 insertions(+), 5 deletions(-)

diffs (72 lines):

diff -r f7bc3c1b59fc -r fde0c6d1560d sys/kern/kern_ksyms.c
--- a/sys/kern/kern_ksyms.c     Wed Jun 14 00:40:05 2017 +0000
+++ b/sys/kern/kern_ksyms.c     Wed Jun 14 00:52:37 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kern_ksyms.c,v 1.84 2016/07/07 06:55:43 msaitoh Exp $  */
+/*     $NetBSD: kern_ksyms.c,v 1.85 2017/06/14 00:52:37 chs Exp $      */
 
 /*-
  * Copyright (c) 2008 The NetBSD Foundation, Inc.
@@ -73,7 +73,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_ksyms.c,v 1.84 2016/07/07 06:55:43 msaitoh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_ksyms.c,v 1.85 2017/06/14 00:52:37 chs Exp $");
 
 #if defined(_KERNEL) && defined(_KERNEL_OPT)
 #include "opt_copy_symtab.h"
@@ -336,8 +336,9 @@
        nglob = 0;
        for (i = n = 0; i < nsyms; i++) {
 
-               /* This breaks CTF mapping, so don't do it when
-                * DTrace is enabled
+               /*
+                * This breaks CTF mapping, so don't do it when
+                * DTrace is enabled.
                 */
 #ifndef KDTRACE_HOOKS
                /*
@@ -396,6 +397,7 @@
        tab->sd_symstart = nsym;
        tab->sd_symsize = n * sizeof(Elf_Sym);
        tab->sd_nglob = nglob;
+
        addsymtab_strstart = str;
        if (kheapsort(nsym, n, sizeof(Elf_Sym), addsymtab_compar, &ts) != 0)
                panic("addsymtab");
@@ -731,11 +733,14 @@
     char *strstart, vsize_t strsize)
 {
        struct ksyms_symtab *st;
+       void *nmap;
 
        st = kmem_zalloc(sizeof(*st), KM_SLEEP);
+       nmap = kmem_zalloc(symsize / sizeof(Elf_Sym) * sizeof (uint32_t),
+                          KM_SLEEP);
        mutex_enter(&ksyms_lock);
        addsymtab(name, symstart, symsize, strstart, strsize, st, symstart,
-           NULL, 0, NULL);
+           NULL, 0, nmap);
        mutex_exit(&ksyms_lock);
 }
 
@@ -757,6 +762,8 @@
                if (!ksyms_isopen) {
                        TAILQ_REMOVE(&ksyms_symtabs, st, sd_queue);
                        ksyms_sizes_calc();
+                       kmem_free(st->sd_nmap,
+                                 st->sd_nmapsize * sizeof(uint32_t));
                        kmem_free(st, sizeof(*st));
                }
                break;
@@ -984,6 +991,8 @@
                next = TAILQ_NEXT(st, sd_queue);
                if (st->sd_gone) {
                        TAILQ_REMOVE(&ksyms_symtabs, st, sd_queue);
+                       kmem_free(st->sd_nmap,
+                                 st->sd_nmapsize * sizeof(uint32_t));
                        kmem_free(st, sizeof(*st));
                        resize = true;
                }