-HEAD on gxemul/MALTA is broken

[Andrew Duane]

I tripped across this doing some early Octeon work. IIRC, it has to do with the static kenv (kern_envp) not being initialized properly. I had to work around it somehow, but I'm afraid I forgot how :(

 ....................................
Andrew L. Duane
Resident Architect - AT&T Technical Lead
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aduane at juniper.net



-----Original Message-----
From: owner-freebsd-mips at freebsd.org [mailto:owner-freebsd-mips at freebsd.org] On Behalf Of Adrian Chadd
Sent: Wednesday, April 17, 2013 2:03 PM
To: freebsd-mips at freebsd.org
Subject: Re: -HEAD on gxemul/MALTA is broken

On 17 April 2013 10:49, Adrian Chadd <adrian at freebsd.org> wrote:

> gcc version 4.2.1 20070831 patched [FreeBSD] [ warning: LOW reference: 
> vaddr=0x00000000, exception TLBL,
> pc=0x8020f024 <init_dynamic_kenv+0x3c> ] Trap cause = 2 (TLB miss 
> (load or instr. fetch) - kernel mode) [ thread pid 0 tid 0 ]
> Stopped at      0x8020f024:     lb      v0,0(s2)
> db>

(kgdb) list *0x8020f024
0x8020f024 is in init_dynamic_kenv
(/usr/home/adrian/work/freebsd/svn/src/sys/kern/kern_environment.c:234).
229             int i;
230
231             kenvp = malloc((KENV_SIZE + 1) * sizeof(char *), M_KENV,
232                     M_WAITOK | M_ZERO);
233             i = 0;
234             if (*kern_envp != '\0') {
235                     for (cp = kern_envp; cp != NULL; cp =
kernenv_next(cp)) {
236                             len = strlen(cp) + 1;
237                             if (len > KENV_MNAMELEN + 1 +
KENV_MVALLEN + 1) {
238                                     printf(
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