Do a much better job of DWIM with partial device specifications.
Fix the module metadata build process, which was completely broken.
Use a larger read buffer when copying large objects in; this
improves performance marginally and will avoid flushning any small caches
we might choose to implement.
Remove debugging in command_read().
Correctly strip leading controls on script commands.
Make 'ls' more DWIM in regard to pathnames. We can still do better.
- Don't whine about nodes we can't stat(); these are usually
symlinks that lead out of the filesystem.
- Autoboot is now controlled by $autoboot_delay, which is a value
in seconds or NO to disable autoboot.
- Don't autoboot at the end of boot.conf if we have already tried.
- Add a 'read' command to complement 'echo'. Both are still hidden.
- Improve the 'source' command/function so that it is possible to
source scripts off removable media. The entire script is read and
saved before beginning execution. Script lines beginning with
'@' will not be echoed when being executed. Script execution will
normally terminate at the first error, however if the script line
begins with '-' this behaviour is overriden for that command.
Strip any device name information from the kernel name
before passing it in.
biosdisk.c
Be more strict about matching device names to slice entries.
Only allow unsliced syntax on unsliced disks.
Allocate space for, and copy, NDOSPART slice entries from the
MBR, not just one. Add some extra debugging while we're at it.
elf_freebsd.c
Initialise the symbol table start/end pointers in case we don't
have them.
Use bd_getdev() to work out a dev_t for the root device.
Allow $rootdev to override $currdev as the root device.
biosdisk.c
Save the slice table and disklabel when opening a disk.
Add bd_getdev(), which attempts to return a dev_t corresponding
to a given device. Cases which it still doesn't get right:
- The inevitable da-when-wd-also-exists
- Disks with no slice table (the slice number is not set correctly)
The first is difficult to get right, the second will be
fixed in an upcoming commit.
comconsole.c
vidconsole.c
getchar() should return an 8-bit value; some BIOSsen pack extra
information in %eax.
libi386.h
Remove some stale prototypes, add new ones.
Increase the robustness of the "is it time to boot yet" test;
if the time skipped the "when" time, we would miss it.
Don't spin in an endless loop if we don't find the first possible
kernel suggested. When we run out, don't try to load an empty
kernel name.
load_aout.c
printf format warnings
of the ..umm.. "wierd" way binutils lays out the file. The section
headers are nearly at the end of the file and this is a problem when
loading from a .gz file which can't seek backwards (or has a limited
reverse seek, ~2K from memory).
This is intended to be compatable with the ddb/db_elf.c code and the
alpha/libalpha/elf_freebsd.c layout. I've studied these (which are NetBSD
derived) but did it a bit differently. Naturally the process is similar
since it's supposed to end up with the same result.
bootblocks, the kernel shows up as the primary module:
[3:24am]~-100# kldstat
Id Refs Address Size Name
1 1 0xf0100000 ff00000 /kernel
^^^^ oops.. :-)
Based heavily on aout_freebsd.c. Hmm.. There's so much in common that
these could probably be combined and just check the metadata to see which
format it is.
so far, and should probably be able to be made to work for the alpha
without too much trouble once it's connected up and my assumptions tested.
I think (but have not tested) it will also load "old" ELF kernels that
were not linked with DYNAMIC headers.
The module glue is yet to come. (oh fun.. :-)
It does not explicitly load symbols [yet]. The _DYNAMIC data contains a
runtime symbol set that ddb can use via ddb/db_kld.c. It'll be missing
some detail that stabs normally provides (eg: number of args to a function,
line numbers, etc). On the other hand, those minimal symbols will always
be available even on a stripped kernel.
This is mostly stolen from load_aout.c with some ideas from
alpha/libalpha/elf_freebsd.c.
Presumably VTOP doesn't work for static objects.
The easiest way to get it working was to reserve some space after the
environment strings and copy the bootinfo struct there.
Also, set RB_BOOTINFO, it's needed.
I got the code to load and run an unmolested kernel OK for the first time
with this system a few minutes ago - at last!. I did have to stop it
looking at the floppy though as BTX was trapping a mode 14 fault when
it look for /boot/boot.conf when no disk was in the drive. (I'm booting
from a scsi disk (bios disk 0x80)).
Now to teach it about ELF and modules :-)
