Date: Wed, 15 Aug 2001 00:12:37 +0200 From: Wilko Bulte <wkb@freebie.xs4all.nl> To: Mike Smith <msmith@FreeBSD.ORG> Cc: Andrew Gallatin <gallatin@cs.duke.edu>, freebsd-alpha@FreeBSD.ORG Subject: Re: AlphaServer 4100 boot/install problem Message-ID: <20010815001237.B41154@freebie.xs4all.nl> In-Reply-To: <20010813192638.A36352@freebie.xs4all.nl>; from wkb@freebie.xs4all.nl on Mon, Aug 13, 2001 at 07:26:38PM %2B0200 References: <20010813081521.A34999@freebie.xs4all.nl> <200108130623.f7D6Ns203390@mass.dis.org> <20010813192638.A36352@freebie.xs4all.nl>
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On Mon, Aug 13, 2001 at 07:26:38PM +0200, Wilko Bulte wrote:
> On Sun, Aug 12, 2001 at 11:23:54PM -0700, Mike Smith wrote:
> > > > Please, try using 'more' in the loader to read a large (>8k) text
> > > > document from somewhere; one of the loader's 4th files would do it. Make
> > > > sure it looks right.
> > >
> > > OK, I tried:
> > >
> > > 'more' on src/checksum.md5
> > >
> > > I don't see any anomalies in the display of more.
> >
> > Ok. Next step, put some diagnostics in
> > sys/boot/common/load_elf.c:elf_loadfile(), every place that it returns
>
> Is this the correct function? I don't seem to have it. Might it be you
> mean:
>
> /*
> * Attempt to load the file (file) as an ELF module. It will be stored at
> * (dest), and a pointer to a module structure describing the loaded object
> * will be saved in (result).
> */
> int
> elf_loadmodule(char *filename, vm_offset_t dest, struct loaded_module
> **result)
In the meantime I ran a number of new experiments:
- boot from floppy, using the same 'make release' as for the CD: Just
Works
- take the 4.3R cdboot and stick that on the CD instead of the one
which was 'make released' out of 4.4-PRERELEASE source. This does not
work as in:
FreeBSD/alpha SRM CD9660 boot, Revision 0.1
(jkh@beast.freebsd.org, Mon Mar 20 21:08:56 GMT 2000)
Memory: 65536 k
> echo \007\007
> autoboot 10
Hit [Enter] to boot immediately, or any other key for command prompt.
Booting [kernel]...
can't load 'kernel'
autoboot: no bootable kernel
|
Type '?' for a list of commands, 'help' for more detailed help.
This experiment I ran because the only thing Matt MFC-ed was the
multiple prom-open in cdboot. I was somehow expecting a cdboot dependency.
It seems that assumption was false.
So.. it looks like we can safely assume it is the loader alright. But only
when started from CD/cdboot. I have put printf()s in elf_loadmodule like:
/*
* Open the image, read and validate the ELF header
*/
if (filename == NULL) /* can't handle nameless */
{ printf ("elf_loadmodule: filename\n");
return(EFTYPE); }
printf ("elf_loadmodule: filename= %s\n",filename);
if ((fd = open(filename, O_RDONLY)) == -1)
{ printf ("elf_loadmodule: cannot open\n");
return(errno); }
firstpage = malloc(PAGE_SIZE);
if (firstpage == NULL)
{ printf ("elf_loadmodule: malloc\n");
return(ENOMEM); }
firstlen = read(fd, firstpage, PAGE_SIZE);
if (firstlen <= sizeof(ehdr)) {
printf ("elf_loadmodule: readlen\n");
err = EFTYPE; /* could be EIO, but may be small file */
goto oerr;
}
/* Is it ELF? */
if (!IS_ELF(*ehdr)) {
printf ("elf_loadmodule: iself\n");
err = EFTYPE;
goto oerr;
}
if (ehdr->e_ident[EI_CLASS] != ELF_TARG_CLASS || /* Layout ? */
ehdr->e_ident[EI_DATA] != ELF_TARG_DATA ||
ehdr->e_ident[EI_VERSION] != EV_CURRENT || /* Version ? */
ehdr->e_version != EV_CURRENT ||
ehdr->e_machine != ELF_TARG_MACH) { /* Machine ? */
printf ("elf_loadmodule: eftype1\n");
err = EFTYPE;
goto oerr;
}
/*
* Check to see what sort of module we are.
*/
kmp = mod_findmodule(NULL, NULL);
if (ehdr->e_type == ET_DYN) {
/* Looks like a kld module */
if (kmp == NULL) {
printf("elf_loadmodule: can't load module before kernel\n");
err = EPERM;
goto oerr;
}
if (strcmp(elf_kerneltype, kmp->m_type)) {
printf("elf_loadmodule: can't load module with kernel type
'%s'\n",
kmp->m_type);
err = EPERM;
goto oerr;
}
/* Looks OK, got ahead */
kernel = 0;
/* Page-align the load address */
pad = (u_int)dest & PAGE_MASK;
if (pad != 0) {
dest += pad;
}
} else if (ehdr->e_type == ET_EXEC) {
/* Looks like a kernel */
if (kmp != NULL) {
printf("elf_loadmodule: kernel already loaded\n");
err = EPERM;
goto oerr;
}
/*
* Calculate destination address based on kernel entrypoint
*/
dest = (vm_offset_t) ehdr->e_entry;
if (dest == 0) {
printf("elf_loadmodule: not a kernel (maybe static binary?)\n");
err = EPERM;
goto oerr;
}
kernel = 1;
} else {
<etc>
But it does not seem to trigger a printf.
So.. where to go from here? Suggestions welcomed.
--
| / o / / _ Arnhem, The Netherlands email: wilko@FreeBSD.org
|/|/ / / /( (_) Bulte
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