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Warnings fixed:
* SC2086: Double quote to prevent globbing and word splitting.
* SC2006: Use $(...) notation instead of legacy backticked `...`
* SC2039: In POSIX sh, echo flags are undefined
* SC2209: Use var=$(command) to assign output (or quote to assign string)
* SC2164: Use 'cd ... || exit' or 'cd ... || return' in case cd fails
* SC2166: Prefer [ p ] && [ q ] as [ p -a q ] is not well defined.
* SC2034: i appears unused. Verify use (or export if used externally)
* SC2046: Quote this to prevent word splitting.
* SC2236: Use -z instead of ! -n.
There are still a lot of warnings in Kernel/run about:
- SC2086: Double quote to prevent globbing and word splitting.
However, splitting on space is intentional in this case, and not trivial to
change. Therefore ignore the warning for now - but we should fix this in
the future.
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This server listens on port 8000 and serves HTML files from /www.
It's very simple and quite naive, but I think we can start here and
build our way to something pretty neat.
Work towards #792.
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Also, we enable KVM to accelerate the execution when booting with
q35_cmd or qcmd options in the run script.
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During initialization of PCI MMIO access mechanism we ensure that we
have an allocation from the kernel virtual address space that cannot be
taken by other components in the OS.
Also, now we ensure that interrupts are disabled so mapping the region
doesn't fail.
In order to reduce overhead, map_device() will map the requested PCI
address only if it's not mapped already.
The run script has been changed so now we can boot a Q35 machine, that
supports PCI ECAM.
To ensure we will be able to load the machine, a PIIX3 IDE controller
was added to the Q35 machine configuration in the run script.
An AHCI controller was added to the i440fx machine configuration.
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This should give us access to the largest set of CPU features available
on the host machine.
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These scripts assume that they are called from within Kernel/ directory.
For convenience, set the current working directory in the scripts to the
path where they are located.
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We can't use bashisms in our scripts anymore, since we're trying to
keep them POSIXy (to make them easier to run for our own shell someday)
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Also added an option in the run script to force PIO operation mode with
the IDE controller.
In addition, we're no longer limited to PIIX3 and PIIX4 chipsets for DMA
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Also added an option to start Serenity with text mode in QEMU
in the run script.
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This makes QEMU run significantly faster on Linux systems with KVM.
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This makes it easier to test TelnetServer when running in QEMU.
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By setting up the devices in init() and looping over the registered
network adapters in NetworkTask_main, we can remove the remaining
hard-coded adapter references from the network code.
This also assigns IPs according to the default range supplied by QEMU
in its slirp networking mode.
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Also add an AudioServer that (right now) doesn't do much.
It tries to open, parse, and play a wav file. In the future, it can do more.
My general thinking here here is that /dev/audio will be "owned" by AudioServer,
and we'll do mixing in software before passing buffers off to the kernel
to play, but we have to start somewhere.
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This removes grub and all the loopback device business from the default
build process. Running grub takes about a second, and it turns out it's
inconsistently packaged in different distributions, which has led to
at least one confusing issue so far (grub-install vs grub2-install).
Removing it from the basic path will make it easier for people to try
Serenity out.
There are now two scripts that can be used to build a disk image:
1. `build-image-grub.sh` - this will build an image suitable for writing
to the IDE hard drive of a physical machine, complete with a partition
table and bootloader. This can be run in qemu with the `qgrub` target
for the `run` script.
2. `build-image-qemu.sh` - this is a simpler script which creates a bare
filesystem image rather than a full MBR disk.
Both of these call out to `build-root-filesystem.sh` to do most of the
work setting up... the root filesystem.
For completeness' sake, I've retained the `sync.sh` script as a simple
forwarding to `build-image-qemu.sh`.
This relies on the functionality from #194 and #195. #195 allows us to
use `/dev/hda` as the root device when nothing else is specified, and #194
works around a strange feature of qemu that appends a space to the kernel
command line.
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This implements a passthrough disk driver that translates the read/write
block addresses by a fixed offset. This could form the basis of MBR
partition support if we were to parse the MBR table at boot and create that
OffsetDiskDevice dynamically, rather than seeking to a fixed offset.
This also introduces a dependency in the form of grub. You'll need to have
32-bit grub binaries installed to build the project now.
As a bonus, divorcing Serenity from qemu's kernel loading means we can now
*technically* boot on real hardware. It just... doesn't get very far yet.
If you write the `_disk_image` file to an IDE hard drive and boot it in a
machine that supports all the basic PC hardware, it *will* start loading
the kernel.
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Define the multiboot info struct properly so we don't have to grab at byte
offsets in the memory access checker code. Also print kernel command line
in init().
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Also expand the QEMU VGA memory size to 64 MB, since otherwise we won't
have enough memory for double-buffering the screen.
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If someone wants to run without this, they can disable it manually :^)
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Hook this up in Terminal so that the '\a' character generates a beep.
Finally emit an '\a' character in the shell line editing code when
backspacing at the start of the line.
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Patch contributed by "pd"
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The old bootloader was hilariously complicated, requiring a floppy disk with
the kernel on it, and a hard drive with the file system. This patch removes
the floppy disk from the equation and replaces it with a multiboot header.
This means the kernel can now be booted with qemu-system-i386 -kernel kernel
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I'm working on porting GCC and it needs a fair bit of memory to run.
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It's now actually possible to ping other hosts on the network! :^)
I've switched the "run" script over to starting QEMU with user networking
since that works better for my testing needs right now.
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This is all pretty rickety but we can now respond to "arping" from the host
while running inside QEMU. Very cool. :^)
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It will be easier to deal with incoming packets in a separate task.
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(Don't) use this to implement short-form output in ls.
I'm too tired to make a nice column formatting algorithm.
I just wanted something concise when I type "ls".
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Looks like the problem was the weirdly-sized floppy image file.
I guess QEMU was inferring the floppy disk geometry from the image size.
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The kernel doesn't run in QEMU right now and I don't know why.
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It's a lot crappier than I remembered it. It's gonna need a lot of work.
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