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473 commits

Author SHA1 Message Date
Sean Cross
b43366e6ec kernel: services: fix suspend for running processes 
If a process is currently running, it needs to be placed into the
`Debug` state rather than the `Ready` state.

Additionally, the process that's being switched to must enter the
`Running` state.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-25 16:03:06 +08:00
Sean Cross
1cb86078d5 kernel: riscv: suspend or terminate processes that fail 
If a process fails for some reason (e.g. by performing a fault) and
there is no exception handler, either terminate the process or (if
gdbserver is enabled) have it suspend the process.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-25 16:02:11 +08:00
Sean Cross
184274782c kernel: config: temporarily remove support for lto 
LTO is currently broken with Rust 1.54.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-18 18:16:13 +08:00
Sean Cross
bb0339652a kernel: use local copy of riscv crate 
A local copy of the `riscv` crate is used in order to get support for
the `xous` target_os.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-18 18:15:29 +08:00
Sean Cross
19653e9c53 kernel: compatibility with riscv32imac-unknown-xous-elf 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-18 18:14:24 +08:00
Sean Cross
e44eec2334 kernel: fix remaining warnings on hosted mode 
This removes all remaining warnings from hosted mode. Tests pass, and
the system continues to run normally.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-16 15:07:25 +08:00
Sean Cross
5eaa3a41b1 kernel: services: fix warnings on hosted mode 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-16 15:01:07 +08:00
Sean Cross
90d1c7a4b8 kernel: move arch mods into their own dir 
Move `hosted.rs` into `hosted/mod.rs` and `riscv.rs` into
`riscv/mod.rs`.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-16 14:55:38 +08:00
Sean Cross
c59cdfbd51 kernel: rename WouldBlock syscall result 
This reflects the new naming convention, which is clearer.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-16 12:25:39 +08:00
Sean Cross
afdf8531aa kernel: use resolver v2 
This is required now to support tests, since tests create processes as
threads.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-16 12:25:15 +08:00
Sean Cross
1b315de830 kernel: make init proces stack grown downwards 
Previously, we were creating a stack beginning at the initial page,
and then growing it upwards. The correct behavior is to begin it at
the top and grow it downwards.

In order to do this, subtract the size of the stack from the initial
pointer.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-15 19:26:11 +08:00
Sean Cross
e29dc5a739 kernel: don't allow allocating exception thread 
This prevents the exception thread from being allocated as a normal
system thread.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-15 19:25:29 +08:00
bunnie
5113df5eec Merge branch 'bunnie-dev' into main 
Use a RefCell to solve the interior mutability issue introduced
by the &mut check introduced on MemoryRanges.
 2021-08-10 18:13:33 +08:00
Sean Cross
9b4333802d vscode: specify platform for vscode support 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 17:51:47 +08:00
Sean Cross
fa2a841f8a kernel: fix hosted mode exception support 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 17:51:24 +08:00
Sean Cross
6985fda7ba kernel: get exceptions fully working 
This finishes work with exceptions such that they now actually work.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 17:47:44 +08:00
Sean Cross
9bba083e2e kernel: remove debug print from mem.rs 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 13:05:23 +08:00
Sean Cross
15c9eadc4c kernel: riscv: re-fix mem warnings 
The previous approach did not work, and broke everything. This fixes it
properly.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 13:02:16 +08:00
Sean Cross
b6f706411b kernel: gdb_server: fix clippy warnings 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 12:55:22 +08:00
Sean Cross
68f5e81d3f kernel: riscv: fix warnings in process 
Fix clippy warnings in the `process.rs` file.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 12:54:43 +08:00
Sean Cross
dbd34318ce Revert "kernel: fix remaining clippy warnings" 
This appears to have broken things.

This reverts commit 8b0dd3630c.
 2021-08-06 12:51:40 +08:00
Sean Cross
8b0dd3630c kernel: fix remaining clippy warnings 
This removes all remaining clippy warnings from inside the kernel.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 11:43:34 +08:00
Sean Cross
0a6a1f2edd kernel: syscall: ignore final Clippy warning 
This warning is due to some debug information that is currently unused.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 11:39:09 +08:00
Sean Cross
cc8dc49dba kernel: riscv: refactor irqs to support exceptions 
This fixes the exception handler so that it can support user-defined
exceptions. Additionally, kernel mode errors are called out now.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 11:37:27 +08:00
Sean Cross
19f68edbb4 kernel: riscv: allow exceptions with NULL pc 
When the program counter is NULL, we can still get exceptions. This
happens when we jump to an invalid address, for example.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 11:34:50 +08:00
Sean Cross
08b787a03e kernel: debug: fix remaining clippy lints 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 11:34:30 +08:00
Sean Cross
c7ff0ceb21 kernel: mem: fix remaining clippy lints 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 11:32:52 +08:00
Sean Cross
d27a2eb27e kernel: mem: use iter instead of array access 
This compresses the entirety of the memory range finder into a single
statement. As a result, duplicate code is removed and we can elide more
range checks.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 11:30:29 +08:00
Sean Cross
9dc4fcbf55 kernel: services: fix all clippy warnings 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 10:16:29 +08:00
Sean Cross
d4675ef9cf kernel: services: allow unsetting exception handler 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 10:05:29 +08:00
Sean Cross
5b2ac0df68 kernel: implement SetExceptionHandler routine 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 10:03:29 +08:00
Sean Cross
76953985fe kernel: fix clippy warnings in mem/server 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 10:03:12 +08:00
Sean Cross
059fc18850 services: add exception handler routines 
Add a function to set and one to clear the current exception handler.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 10:02:32 +08:00
Sean Cross
a096509a04 kernel: irq: use iter for IRQ_HANDLERS 
Don't use direct indexing. Instead, use an iterator to go through the
IRQ_HANDLERS array.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 10:00:42 +08:00
Sean Cross
b98e465d12 kernel: more clippy warning fixes 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-05 16:59:27 +08:00
Sean Cross
759ddfedd6 kernel: add initial cut of exception handling 
Though it is not yet wired up, the exception handler groundwork is laid
here.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-05 16:18:10 +08:00
Sean Cross
fdf3c12b85 Merge branch 'main' into exception-handler 2021-08-05 10:03:55 +08:00
bunnie
d68b6639cf remove now-unused stub 2021-08-04 23:29:00 +08:00
bunnie
d42658a65d fix kernel debug input 
for whatever reason, by default, uarts in litex are configured
not to drain a fifo when you read them -- they only drain
after you write EV_PENDING.
 2021-08-04 22:40:12 +08:00
Sean Cross
afcef0d05b kernel: use vendered version of utralib 
By vendoring this package, we can avoid causing a rebuild unnecessarily.

This will be removed when Rust 1.55 is released and we can bring the
`kernel` package back into the main workspace.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-04 12:19:16 +08:00
Sean Cross
f5cf94524a kernel: add framework for exceptions 
Add the ability to invoke exception handlers. This is not yet properly
wired up, but the framework is there.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-02 11:04:47 +08:00
Sean Cross
2cd42edc22 kernel: use target_os = "none" instead of baremetal 
This is more portable, and plays nicer with `rust-analyzer`.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-07-26 15:32:59 +08:00
Sean Cross
df30fd580d kernel: add Exception(usize) as process state 
When a process encounters an exception of some sort, it will enter this
state if a handler is available.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-07-26 15:32:03 +08:00
bunnie
53f35f9928 intermediate work toward getting the password box going 
lots of changes, maybe finally getting out of the UX rathole now
that basic localization is in place
 2021-07-26 00:51:22 +08:00
Sean Cross
4e17946960 kernel: riscv: ensure stack is 16-byte aligned 
Make sure processes are set up such that the stack is aligned to a
16-byte boundary.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-07-07 14:34:05 +08:00
Sean Cross
4e54bfdc7a kernel: use gdbstub dev/0.6 
The previous brach will shortly be deleted.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-27 19:23:53 +08:00
Sean Cross
7b7be0fe9e hosted: fix MemoryRange refactor 
This fixes the MemoryRange refactor where `.addr` and `.size` are now
private fields.

Previously it had only been tested on baremetal mode.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-24 18:02:28 +08:00
Sean Cross
a99839ecd6 xous: mark MemoryRange fields as private 
Mark the private fields in a `MemoryRange` struct as being private. This
allows us to perform operations on the memory range armed with the
knowledge that the entire range is valid and unaliased.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-24 17:41:16 +08:00
Sean Cross
1fb7d4ebd5 kernel: use unsafe {} on Hosted mode 
Since `MemoryRange::new()` is now unsafe, add an `unsafe {}` note when
calling this function on Hosted mode.

This fixes the build.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-24 17:07:41 +08:00
Sean Cross
977a175bb5 xous: mark MemoryRange::new() as unsafe 
This function allows for creating arbitrary memory ranges. Mark this
function as `unsafe` in order to warn users that this can be used to
create invalid memory regions.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-24 17:02:02 +08:00