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Re: [Qemu-devel] [SeaBIOS] SeaBIOS error with Juniper FreeBSD kernel

From: Bjørn Mork
Subject: Re: [Qemu-devel] [SeaBIOS] SeaBIOS error with Juniper FreeBSD kernel
Date: Mon, 01 Aug 2011 15:49:11 +0200
User-agent: Gnus/5.110017 (No Gnus v0.17) Emacs/23.2 (gnu/linux)

Brandon Bennett <address@hidden> writes:

>> Are all versions based on FreeBSD 4.11?
>> Are newer versions still affected?
> Newer versions should be based on 6.1 but there are a lot of changes.
> I haven't had a chance to test with something newer yet.

Sorry for the delay due to vacation...

I just confirmed the issue running

 "JUNOS 11.1R3.5 built 2011-06-25 00:17:21 UTC"

which is as new as it officially gets at the moment. I don't think the
FreeBSD version really matters.  I believe the issue is related to the
"platform_early_bootinit", whatever that is, which is Juniper specific
code.  I assume they are checking the SMBIOS for some data which is
present on the real hardware, and this check triggers the crash.

>From the 11.1R3.5 boot:

Hit [Enter] to boot immediately, or space bar for command prompt.
Booting [/kernel]...               
platform_early_bootinit: M/T Series Early Boot Initialization
kernel trap 12 with interrupts disabled

Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0xbff3fffc
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc0a22377

Fatal trap 30: reserved (unknown) fault while in kernel mode
instruction pointer     = 0x20:0xc09f4e66
stack pointer           = 0x28:0xc1021a00
frame pointer           = 0x28:0xc1021a10
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, IOPL = 0
current process         = 0 ()
trap number             = 30
dog: ERROR - reset of uninitialized watchdog
panic: reserved (unknown) fault
(null)(c0c4f4a0,c0c4f4a0,c0be3672,c1021948,a) at 0xc0a14867
(null)(c0be3672,1e,c10219c0,1,1) at 0xc05a723e
(null)(a,0,a,ffff7fff,ffffffff) at 0xc0a289dd
(null)(c10219c0) at 0xc0a29921
(null)(0,c021b4b,3030000,c0c22a00,c0c54400) at 0xc0a15e7b
(null)(c0c22a00,63,5,c1021bac,63) at 0xc09f50c2
(null)(63,10,1000000,1,c0bbe530) at 0xc05e66f3
(null)(63,c1021bac,c0be340e,3f8,1002580) at 0xc05c7ca5
(null)(c0bbe52c,c05c7c45,c1021bac,a,c1021bcc) at 0xc05c7df5
(null)(c0bbe52c,28,c1021cc4,c0be33fe,a) at 0xc05c8f73
(null)(c0c4d0a0,c1021c84,c1021c38,c05c8f73,c0bbe604) at 0xc0a287da
(null)(c0bbe604,c,0,0,0) at 0xc0a28c2a
(null)(c1021c84) at 0xc0a296e8
(null)(cffffef0,ffffef0,4,c00e0000,c00e0000) at 0xc0a15e7b
(null)(0,c0bc71c6,4,10,0) at 0xc0a0f7df
(null)(c0be5837,c1021d34,c1021d30,a,c1021d54) at 0xc0a0f8ed
(null)(c0bc1e40,c0b6f924,c1021d84,c0a1e5a9,80) at 0xc0b3a694
(null)(80,c0a15ec0,f,3,20) at 0xc0b3ad7b
(null)(1026000) at 0xc0a1e5a9
(null)() at 0xc04aa67d
dog: ERROR - reset of uninitialized watchdog
dog: ERROR - reset of uninitialized watchdog
Uptime: 1s

Also confirmed that 11.1R3.5 is working with SeaBIOS modified as

diff --git a/src/smbios.c b/src/smbios.c
index 8df0f2d..c96deb5 100644
--- a/src/smbios.c
+++ b/src/smbios.c
@@ -17,7 +17,7 @@ smbios_entry_point_init(u16 max_structure_size,
                         u16 number_of_structures)
     struct smbios_entry_point *ep = malloc_fseg(sizeof(*ep));
-    void *finaltable = malloc_high(structure_table_length);
+    void *finaltable = malloc_fseg(structure_table_length);
     if (!ep || !finaltable) {


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