18620: core: add core_mutex_debug to aid debugging deadlocks r=maribu a=maribu
### Contribution description
Adding `USEMODULE += core_mutex_debug` to your `Makefile` results in
on log messages such as
[mutex] waiting for thread 1 (pc = 0x800024d)
being added whenever `mutex_lock()` blocks. This makes tracing down
deadlocks easier.
### Testing procedure
Run e.g.
```sh
USEMODULE=core_mutex_debug BOARD=nucleo-f767zi make -C tests/mutex_cancel flash test
```
which should provide output such as
```
Welcome to pyterm!
Type '/exit' to exit.
READY
s
[mutex] waiting for thread 1 (pc = 0x8000f35)
START
main(): This is RIOT! (Version: 2022.10-devel-841-g5cc02-core/mutex/debug)
Test Application for mutex_cancel / mutex_lock_cancelable
=========================================================
Test without cancellation: OK
Test early cancellation: OK
Verify no side effects on subsequent calls: [mutex] waiting for thread 1 (pc = 0x800024d)
OK
Test late cancellation: [mutex] waiting for thread 1 (pc = 0x0)
OK
TEST PASSED
```
```sh
$ arm-none-eabi-addr2line -a 0x800024d -e tests/mutex_cancel/bin/nucleo-f767zi/tests_mutex_cancel.elf
0x0800024d
/home/maribu/Repos/software/RIOT/tests/mutex_cancel/main.c:51
```
### Issues/PRs references
Depends on and includes https://github.com/RIOT-OS/RIOT/pull/18619
19296: nanocoap: allow to define CoAP resources as XFA r=maribu a=benpicco
19504: cpu/cc26xx_cc13xx: Fix bogus array-bound warning r=maribu a=maribu
### Contribution description
GCC 12 create a bogus array out of bounds warning as it assumes that because there is special handling for `uart == 0` and `uart == 1`, `uart` can indeed be `1`. There is an `assert(uart < UART_NUMOF)` above that would blow up prior to any out of bounds access.
In any case, optimizing out the special handling of `uart == 1` for when `UART_NUMOF == 1` likely improves the generated code and fixes the warning.
/home/maribu/Repos/software/RIOT/cc2650/cpu/cc26xx_cc13xx/periph/uart.c:88:8: error: array subscript 1 is above array bounds of 'uart_isr_ctx_t[1]' [-Werror=array-bounds]
88 | ctx[uart].rx_cb = rx_cb;
| ~~~^~~~~~
/home/maribu/Repos/software/RIOT/cc2650/cpu/cc26xx_cc13xx/periph/uart.c:52:23: note: while referencing 'ctx'
52 | static uart_isr_ctx_t ctx[UART_NUMOF];
| ^~~
/home/maribu/Repos/software/RIOT/cc2650/cpu/cc26xx_cc13xx/periph/uart.c:89:8: error: array subscript 1 is above array bounds of 'uart_isr_ctx_t[1]' [-Werror=array-bounds]
89 | ctx[uart].arg = arg;
| ~~~^~~~~~
/home/maribu/Repos/software/RIOT/cc2650/cpu/cc26xx_cc13xx/periph/uart.c:52:23: note: while referencing 'ctx'
52 | static uart_isr_ctx_t ctx[UART_NUMOF];
| ^~~
### Testing procedure
The actual change is a pretty obvious one-liner, so that code review and a green CI should be sufficient. If not, running any UART example app without regression should do.
### Issues/PRs references
None
19506: tools/openocd: Fix handling of OPENOCD_CMD_RESET_HALT r=maribu a=maribu
### Contribution description
The OPENOCD_CMD_RESET_HALT was not longer correctly passed to the script. This fixes the issue.
### Testing procedure
Flashing of e.g. the `cc2650-launchpad` with upstream OpenOCD should work again.
### Issues/PRs references
The change was added to https://github.com/RIOT-OS/RIOT/pull/19050 after testing the PR and before merging. I'm not sure if the fix never worked because of this, or if behavior of `target-export-variables` or GNU Make changed.
Co-authored-by: Marian Buschsieweke <marian.buschsieweke@ovgu.de>
Co-authored-by: Benjamin Valentin <benjamin.valentin@bht-berlin.de>
Co-authored-by: Benjamin Valentin <benjamin.valentin@ml-pa.com>
19365: bootloaders: fix bootloader button logic r=benpicco a=dylad
### Contribution description
In lastest master, the `BTN_BOOTLOADER_INVERTED` logic doesn't work as expected.
This PR fixes the underlying logic by replacing the `BTN_BOOTLOADER_INVERTED` macro definition by a runtime function.
In fact the current code:
```
#ifndef BTN_BOOTLOADER_INVERTED
#if (BTN0_MODE == GPIO_IN_PD)
#define BTN_BOOTLOADER_INVERTED false
#else
#define BTN_BOOTLOADER_INVERTED true
#endif
#endif
```
cannot work because both `BTN0_MODE` and `GPIO_IN_PD` are not known by the precompiler as they are enum values defined at cpu level.
Thus, replaces it by a runtime function in our bootloader applications.
I've also add `GPIO_OD_PU` along side `GPIO_IN_PU` and add a new define (which can be override at board level or app level) in case an external pullup is used.
### Testing procedure
Flash the riotboot_dfu bootloader:
`make BOARD=saml21-xpro -C bootloaders/riotboot_dfu flash`
Then, flash any test app:
`PROGRAMMER=dfu-util USEMODULE=usbus_dfu make BOARD=saml21-xpro -C tests/shell riotboot/flash-slot0`
With master, the application will not start.
With this PR, the application will start after flashing.
### Issues/PRs references
Fixes#19364
19366: nanocoap_sock: don't include token in empty ACK response r=benpicco a=benpicco
19367: cord: bump reference from draft to rfc r=benpicco a=bergzand
### Contribution description
The draft is an RFC, this bumps the "see also" in the docs to the rfc.
### Testing procedure
Check that the correct RFC is linked in the docs.
### Issues/PRs references
None
Co-authored-by: Dylan Laduranty <dylan.laduranty@mesotic.com>
Co-authored-by: Benjamin Valentin <benjamin.valentin@ml-pa.com>
Co-authored-by: Koen Zandberg <koen@bergzand.net>
18773: nanocoap_sock: fix handling empty ACKs with separate response r=maribu a=benpicco
Co-authored-by: Benjamin Valentin <benjamin.valentin@ml-pa.com>
Co-authored-by: Benjamin Valentin <benjamin.valentin@bht-berlin.de>
If a NON confirmable message is sent with a callback function,
not receiving a response in time would lead to a retransmission.
This is of course an error, as only CON messages are to be retransmitted.
The assertion is a bit overeager.
In case of receiving a wrong message ID, we re-try receive without
entering the STATE_REQUEST_SEND state again, so it is expected that
we get a non-NULL ctx/response from sock_udp_recv_buf().
What this assert should actually check is that we don't get a non-NULL
ctx after calling sock_udp_recv_buf() with a non-NULL ctx.
So make this explicit to not falsely fail the assertion.
Some user callbacks might just return the result of some other operation
that returns written bytes or negative error.
Let's not break those, only consider negative callback returns an error.
