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139 commits

Author SHA1 Message Date
Sean Cross
956d5f0866 kernel: remove debugging prints for memory allocation 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-09-27 19:38:15 +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
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
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
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
5b2ac0df68 kernel: implement SetExceptionHandler routine 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-08-06 10:03:29 +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
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
Sean Cross
4901453e3d syscall: retor_mem: switch to client in hosted mode 
Switch to the message client when returning memory in Hosted mode. This
properly marks a process as ready-to-run, which was otherwise not
correctly done.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-21 20:04:22 +08:00
Sean Cross
9ced90190e kernel: fix process suspension 
This enables processes to be "suspended" by going into a Debug state.
Messages will back up and processes will continue to be scheduled around
the suspended process, while the system will continue to operate.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-18 12:55:21 +08:00
Sean Cross
13204d1714 Merge branch 'master' into debugger 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-18 10:56:30 +08:00
Sean Cross
76b16579b0 kernel: syscall: remove warning in hosted mode 
This was a function whose only purpose is useful in baremetal mode.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-16 17:54:55 +08:00
Sean Cross
fb839f3217 wip 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-16 16:53:40 +08:00
Sean Cross
29c36c3b0f debug: get kernel building 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-06 11:39:41 +08:00
Sean Cross
bbda4365ae wip commit 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-06-01 17:57:01 +08:00
Sean Cross
be6e0a9895 kernel: fix thread termination and waiting 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-21 17:23:13 +08:00
Sean Cross
714aff830c kernel: implement JoinThread(tid) 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-21 16:32:38 +08:00
Sean Cross
e616a4bf4f kernel: fix hosted build/warnings 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-20 11:52:03 +08:00
Sean Cross
09b8242bb2 kernel: get process termination "working" on risc-v 
This successfully allows a process to call `terminate_process(val)`.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-20 11:42:31 +08:00
Sean Cross
eb7895d601 xous: add a return code to TerminateProcess 
As part of this refactor, make `terminate_process()` a divergent call.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-20 11:01:00 +08:00
Sean Cross
30b82b25b1 kernel: run cargo fmt 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-19 14:12:01 +08:00
Sean Cross
1b85d8a4de kernel: format syscalls as hex 
This improves readability, particuarly when addresses are involved.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-10 14:37:33 +08:00
Sean Cross
23e759ffd8 kernel: fix multi-page lending 
Due to several errors, multi-page lending did not work properly.

To begin with, if a page was not allocated then it would not be able to
be sent. That is, if you allocated 8192 bytes but only ever accessed the
first 4096 bytes, then an error would be encountered when lending the
unaccessed upper page.

Furthermore, due to a striding error in accessing pointers, half-pages
were treated as full pages.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-05-05 10:58:12 +08:00
bunnie
aed2325f68 fix some minor bugs in hosted mode 
memory is not page-aligned so `if !cfg()`-out the alignment
checks in hosted mode
 2021-04-09 17:31:36 +08:00
Sean Cross
4830f3eb2c kernel: server: implement DestroyServer(sid) 
This implements a syscall to shut down a server. Servers may not be shut
down if they have outstanding messages that they have seen but not
responded to.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-04-05 18:18:48 +08:00
Sean Cross
85f0adbb2d kernel: implement Disconnect() syscall 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-04-02 18:37:09 +08:00
Sean Cross
c7b2b2cab0 xous: add offset and valid to returned memory 
This will enable us to have more information about the result that is
returned when mutable memory is modified by a server.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-03-25 13:16:15 +08:00
Sean Cross
568d1263a3 kernel: syscall: remove variables that never change 
The `can_resume` variable doesn't change, and can be made a constant.
This slightly improves reasoning about what the function is doing.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-03-25 09:14:43 +08:00
Sean Cross
b967712e5f kernel: use correct thread ID when server queue is full 
Instead of queueing the client thread number inside the server, queue
the server's thread number inside the server.

This prevents many spooky messages that were occurring when server
queues got full.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-03-24 17:23:39 +08:00
Sean Cross
861565054e kernel: don't activate target thread on hosted mode 
This operation is unneeded on hosted, and causes an error.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-03-23 21:35:52 +08:00
Sean Cross
ff05fff4d6 kernel: syscall: run cargo fmt on syscall.rs 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-03-23 19:53:22 +08:00
Sean Cross
cf1e2435bc kernel: implement GetThreadID and GetProcessID 
Signed-off-by: Sean Cross <sean@xobs.io>
 2021-03-11 11:20:35 +08:00
Sean Cross
83da8c4e7d syscall: remove commented-out pid code 
This isn't used.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-03-03 21:20:21 +08:00
bunnie
0889e83401 Merge remote-tracking branch 'betrusted/hardware' 2021-03-02 21:51:41 +08:00
bunnie
96a19baa8d state before refactor of status to own process 2021-03-02 19:25:41 +08:00
Lina Ceballos
d18500f4d6 adding license and copyright headers 2021-01-25 14:54:00 +01:00
Sean Cross
8d99ee06cf kernel: fix extra-parens warning in syscall 
Remove an extra set of parenthesis.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-01-13 21:09:14 +08:00
bunnie
4ef581a266 riddled with race conditions, but...sort of works 2021-01-08 05:20:53 +08:00
Sean Cross
7b50d00eb8 repo: run cargo fmt 
This reformats line endings to be consistent, and reinforces the
contents of `.gitattributes`.

Signed-off-by: Sean Cross <sean@xobs.io>
 2021-01-03 18:31:51 +08:00
Sean Cross
f49518f7d5 kernel: add connect_for_process() 
This allows one process to establish a connection to a server on behalf
of another process.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-12-04 23:25:41 +08:00
Sean Cross
b094f1147b xous: implement sender.pid() 
This is mostly an implementation detail, but appears to work.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-12-04 22:38:35 +08:00
Sean Cross
85b6357d26 kernel: implement CreateServer 
This implements CreateServer, which creates a server with a random name.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-12-04 20:58:14 +08:00
Sean Cross
25e4d16de3 xous-os: rename CreateServer to CreateServerWithAddress 
Servers will, by default, get randomly-assigned SIDs. Certain servers
will want to have well-known SIDs, such as the log server or the
nameserver. These will use a separate call in order to perform this
priveledged operation.

A subsequent patch will add `CreateServer`.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-12-04 20:33:33 +08:00
Sean Cross
8927ef00a2 kernel: add TryReceiveMessage support 
This is a nonblocking form of ReceiveMessage.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-11-25 20:26:21 +08:00
Sean Cross
e3cb05baf5 kernel: syscall: send WouldBlock to retry messages 
This is handled by the client library to re-send the request.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-11-23 20:04:37 +08:00
Sean Cross
65c8c6eef5 kernel: implement and use klog!() macro 
This replaces the majority of println!() and print!() calls, and works
on baremetal and hosted modes.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-11-23 17:24:28 +08:00
Sean Cross
eecd9c2367 kernel: syscall: return Ok for yield() on hosted 
When running in Hosted mode, a yield shouldn't do anything.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-11-23 17:23:53 +08:00
Sean Cross
8a3f6a2b43 kernel: fix mutableborrow message returning 
We weren't properly updating the packet when a mutableborrow was getting
returned.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-11-23 15:19:02 +08:00
Sean Cross
4e6a189e4e kernel: fix returning scalars in interrupt context 
This is now allowed.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-11-11 16:06:08 +08:00
Sean Cross
2698333382 kernel: allow making syscalls from an interrupt 
This enables calling some syscalls from within an interrupt context.

Signed-off-by: Sean Cross <sean@xobs.io>
 2020-11-01 17:59:26 +08:00