Hacks and fixes to enable picolibc CI on MSP430 #67
Conversation
Provide lots more space for programs. This doesn't match the real hardware anymore ... Signed-off-by: Keith Packard <keithp@keithp.com>
Use hex20 instead of hex16 to dump the full 20-bit value of each register. Signed-off-by: Keith Packard <keithp@keithp.com>
When an exception happens, dump the failing instruction. Signed-off-by: Keith Packard <keithp@keithp.com>
This controls whether the simulator runs as fast as possible or pauses to make the execution time more realistic. The default is enabled, disable by passing -realtime=false on the command line. Signed-off-by: Keith Packard <keithp@keithp.com>
Only providing 16 bits doesn't work well Signed-off-by: Keith Packard <keithp@keithp.com>
This shows an application stack trace. Signed-off-by: Keith Packard <keithp@keithp.com>
Provide exit, putchar, a message writing function and a register dump call. These all work by detecting writes to the status register which are invalid. Signed-off-by: Keith Packard <keithp@keithp.com>
Disables startup messages Signed-off-by: Keith Packard <keithp@keithp.com>
This enables the console stream command handler. It is enabled by default, disable with -console=false Signed-off-by: Keith Packard <keithp@keithp.com>
Redirects USCI A0 to stdout when -nogui is enable. Signed-off-by: Keith Packard <keithp@keithp.com>
Check for operand size when masking src value before subtraction. Signed-off-by: Keith Packard <keithp@keithp.com>
| private int[] execCounter; | ||
| private int[] trace; | ||
| private int tracePos; | ||
| private int prevPc = 0; |
There was a problem hiding this comment.
No need to initialize this one, 0 is the default value for fields of numeric types.
| char c; | ||
| System.out.printf("0x%x 0x%x: ", reg[0], message); | ||
| try { | ||
| int off; |
There was a problem hiding this comment.
I think the declaration of off can be in the for-header.
| System.out.println("Warning: tried to write odd PC, not allowed! PC=0x" + Integer.toHexString(value)); | ||
| value -= 1; | ||
| } | ||
| } |
There was a problem hiding this comment.
Accidental whitespace change.
| } else { | ||
| // Send serial output to stdout | ||
| IOUnit usart = cpu.getIOUnit("USCI A0"); | ||
| if (usart instanceof USARTSource) { |
There was a problem hiding this comment.
This can become if (usart instanceof USARTSource usartSource) { in the Cooja repository, and the line with the cast below omitted.
|
All the changes look reasonable from a quick glance, but the source code for MSPSim silently moved into the Cooja repository (https://github.com/contiki-ng/cooja) a while ago. We need to update README.md with that information. I started writing some explanations, but the MSPSim entry-point is only half-integrated with the Cooja entrypoint. That headache is not yours, can we gradually cherry-pick these patches (or equivalents) into the MSPSim that lives in the Cooja repository? |
|
I'm probably going to abandon this series as the binutils-gdb simulator is already integrated into the crosstool-ng toolchain, making that far easier to add to the picolibc CI environment. Please feel free to do whatever you like to these patches. |
2 participants
Here's a series of hacks I wrote which allow me to use mspsim to run picolibc tests. There's only one actual fix here -- extending the CG3 -1 value to 20 bits. Everything else just makes the Tyndall emulator capable of working in picolibc CI.