Date: Sun, 12 May 2002 18:12:20 +0400 (MSD) From: Dmitry Mottl <dima@sinp.msu.ru> To: freebsd-hackers@FreeBSD.org Subject: question: hacking init_main.c Message-ID: <Pine.BSF.4.43.0205121758360.38560-100000@BigKing.sinp.msu.ru>
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I got a page fault (page not present, supervisor read) when I try to
modify /sys/kern/init_main.c
I want kernel print each subsytem name when it called from mi_startup.
So I define char *sysinit_desct[] array and populate it with
description strings.
After I boot kernel I saw expected '*** mi_startup ***' (see patch)
and pagefault after that.
Where is my fault?
Thank you
--- init_main.c.orig Sun May 12 14:24:54 2002
+++ init_main.c Sun May 12 15:21:41 2002
@@ -109,6 +109,57 @@
struct sysinit **sysinit = (struct sysinit **)sysinit_set.ls_items;
struct sysinit **newsysinit;
+char *sysinit_descr[]={
+"SI_SUB_DUMMY = 0x0000000, /* not executed; for linker*/",
+"SI_SUB_DONE = 0x0000001, /* processed*/",
+"SI_SUB_CONSOLE = 0x0800000, /* console*/",
[skipped,so on..]
+};
@@ -167,6 +218,7 @@
register struct sysinit **xipp; /* interior loop of sort*/
register struct sysinit *save; /* bubble*/
+ printf("*** mi_startup ***\n");
restart:
/*
* Perform a bubble sort of the system initialization objects by
@@ -202,6 +254,7 @@
/* Call function */
(*((*sipp)->func))((*sipp)->udata);
+ printf("SYSINIT: %s\n", sysinit_descr[(*sipp)->subsystem]);
/* Check off the one we're just done */
(*sipp)->subsystem = SI_SUB_DONE;
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