* [9fans] xen3: fresh build 9xenpccpuf dies on boot @ 2013-09-12 7:44 Yaroslav 2013-09-12 8:04 ` Richard Miller 0 siblings, 1 reply; 6+ messages in thread From: Yaroslav @ 2013-09-12 7:44 UTC (permalink / raw) To: 9fans [-- Attachment #1: Type: text/plain, Size: 274 bytes --] Re-build of 9xenpccpuf, the PV Xen guest kernel built from sources at /n/sources/xen/xen3/9), with latest changes in sys/src/9/port/, sys/src/libc/ and others - resulted in non-functional kernel: it dies on boot with attached diagnostics. I haven't looked further yet. [-- Attachment #2: xen.png --] [-- Type: image/png, Size: 31688 bytes --] ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [9fans] xen3: fresh build 9xenpccpuf dies on boot 2013-09-12 7:44 [9fans] xen3: fresh build 9xenpccpuf dies on boot Yaroslav @ 2013-09-12 8:04 ` Richard Miller 2013-09-12 13:48 ` Yaroslav 0 siblings, 1 reply; 6+ messages in thread From: Richard Miller @ 2013-09-12 8:04 UTC (permalink / raw) To: 9fans The crash seems to be in init, not the kernel. Are you sure your file system image is good? ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [9fans] xen3: fresh build 9xenpccpuf dies on boot 2013-09-12 8:04 ` Richard Miller @ 2013-09-12 13:48 ` Yaroslav 2013-09-12 13:54 ` erik quanstrom 0 siblings, 1 reply; 6+ messages in thread From: Yaroslav @ 2013-09-12 13:48 UTC (permalink / raw) To: Fans of the OS Plan 9 from Bell Labs > The crash seems to be in init, not the kernel. Are you sure > your file system image is good? it doesn't get far enough for "root from:", so it seems to fail somewhere in the initcode blob ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [9fans] xen3: fresh build 9xenpccpuf dies on boot 2013-09-12 13:48 ` Yaroslav @ 2013-09-12 13:54 ` erik quanstrom 2013-09-13 8:16 ` Yaroslav 0 siblings, 1 reply; 6+ messages in thread From: erik quanstrom @ 2013-09-12 13:54 UTC (permalink / raw) To: yarikos, 9fans On Thu Sep 12 09:49:19 EDT 2013, yarikos@gmail.com wrote: > > The crash seems to be in init, not the kernel. Are you sure > > your file system image is good? > > it doesn't get far enough for "root from:", so it seems to fail > somewhere in the initcode blob this may be related to the change put in for the routerboard. it increased the size of Tos, and thus shifted everything around on the stack. but the old pc kernel didn't account for this, and 386 kernels failed with bad arg in syscall. this never affected the pae kernel, or the other architectures. here's the fix as it went into 9atom. ; 9fs atom ; cd /n/atom/plan9/sys/src/9/pc ; history -D main.c Aug 3 15:30:45 EDT 2013 main.c 16439 [quanstro] Aug 3 15:30:45 EDT 2013 /n/atomdump/2013/0912/plan9/sys/src/9/pc/main.c 16439 [quanstro] 10a11 > #include <tos.h> 25a27,31 > enum { > /* space for syscall args, return PC, top-of-stack struct */ > Ustkheadroom = sizeof(Sargs) + sizeof(uintptr) + sizeof(Tos), > }; > 294c300 < sp = (uchar*)base + BY2PG - MAXSYSARG*BY2WD; --- > sp = (uchar*)base + BY2PG - Ustkheadroom; - erik ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [9fans] xen3: fresh build 9xenpccpuf dies on boot 2013-09-12 13:54 ` erik quanstrom @ 2013-09-13 8:16 ` Yaroslav 2013-09-13 20:28 ` Richard Miller 0 siblings, 1 reply; 6+ messages in thread From: Yaroslav @ 2013-09-13 8:16 UTC (permalink / raw) To: 9fans, 9fans Thanks, Erik, your guess is absolutely right... Richard, do you mind updating /n/sources/xen/xen3/9/xen3/main.c? term% diff -c /n/sources/xen/xen3/9/xen3/main.c /n/sources/contrib/yk/xen3/main.c /n/sources/xen/xen3/9/xen3/main.c:8,13 - /n/sources/contrib/yk/xen3/main.c:8,14 #include "init.h" #include "pool.h" #include "reboot.h" + #include <tos.h> Mach *m; /n/sources/xen/xen3/9/xen3/main.c:15,20 - /n/sources/contrib/yk/xen3/main.c:16,26 #define BOOTARGSLEN (sizeof xenstart->cmd_line) #define MAXCONF 64 + enum { + /* space for syscall args, return PC, top-of-stack struct */ + Ustkheadroom = sizeof(Sargs) + sizeof(uintptr) + sizeof(Tos), + }; + char bootdisk[KNAMELEN]; Conf conf; char *confname[MAXCONF]; /n/sources/xen/xen3/9/xen3/main.c:270,276 - /n/sources/contrib/yk/xen3/main.c:276,282 uchar *av[32]; uchar **lsp; - sp = (uchar*)base + BY2PG - MAXSYSARG*BY2WD; + sp = (uchar*)base + BY2PG - Ustkheadroom; ac = 0; av[ac++] = pusharg("/386/9dos"); 2013/9/12 erik quanstrom <quanstro@quanstro.net>: > On Thu Sep 12 09:49:19 EDT 2013, yarikos@gmail.com wrote: >> > The crash seems to be in init, not the kernel. Are you sure >> > your file system image is good? >> >> it doesn't get far enough for "root from:", so it seems to fail >> somewhere in the initcode blob > > this may be related to the change put in for the routerboard. > > it increased the size of Tos, and thus shifted everything around > on the stack. but the old pc kernel didn't account for this, and > 386 kernels failed with bad arg in syscall. this never affected the > pae kernel, or the other architectures. here's the fix as it went > into 9atom. > > ; 9fs atom > ; cd /n/atom/plan9/sys/src/9/pc > ; history -D main.c > Aug 3 15:30:45 EDT 2013 main.c 16439 [quanstro] > Aug 3 15:30:45 EDT 2013 /n/atomdump/2013/0912/plan9/sys/src/9/pc/main.c 16439 [quanstro] > 10a11 >> #include <tos.h> > 25a27,31 >> enum { >> /* space for syscall args, return PC, top-of-stack struct */ >> Ustkheadroom = sizeof(Sargs) + sizeof(uintptr) + sizeof(Tos), >> }; >> > 294c300 > < sp = (uchar*)base + BY2PG - MAXSYSARG*BY2WD; > --- >> sp = (uchar*)base + BY2PG - Ustkheadroom; > > - erik -- - Yaroslav ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [9fans] xen3: fresh build 9xenpccpuf dies on boot 2013-09-13 8:16 ` Yaroslav @ 2013-09-13 20:28 ` Richard Miller 0 siblings, 0 replies; 6+ messages in thread From: Richard Miller @ 2013-09-13 20:28 UTC (permalink / raw) To: 9fans > Thanks, Erik, your guess is absolutely right... Richard, do you mind > updating /n/sources/xen/xen3/9/xen3/main.c? Done, thanks to both of you. ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2013-09-13 20:28 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2013-09-12 7:44 [9fans] xen3: fresh build 9xenpccpuf dies on boot Yaroslav 2013-09-12 8:04 ` Richard Miller 2013-09-12 13:48 ` Yaroslav 2013-09-12 13:54 ` erik quanstrom 2013-09-13 8:16 ` Yaroslav 2013-09-13 20:28 ` Richard Miller
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