Running with a sample buffer size larger than the default (120) results in seg fault

[lane-maxwell]

If I attempt to run the daemon with a sample buffer of anything larger than the default value, it results in a SIGSEGV unless I have DMA mode set to MBOX. Below is the output from a gdb session. I'm currently on master, commit c33738a320a3e28824af7807edafda440952c05d. This behavior is occurring on the binary installed via apt (version 79) also.

# DMA mode set to the default (AUTO)
/usr/bin/pigpiod -b 200 -a 0 -g
2022-04-28 16:22:19 sigHandler: Unhandled signal 11, terminating

# DMA mode set to PMAP
/usr/bin/pigpiod -b 200 -a 1 -g
2022-04-28 16:23:31 sigHandler: Unhandled signal 11, terminating

# DMA mode set to MBOX - behaves properly
/usr/bin/pigpiod -b 200 -a 2 -g

cat /sys/firmware/devicetree/base/model 
Raspberry Pi 3 Model B Rev 1.2

 cat /proc/version
Linux version 5.15.32-v8+ (dom@buildbot) (aarch64-linux-gnu-gcc-8 (Ubuntu/Linaro 8.4.0-3ubuntu1) 8.4.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #1538 SMP PREEMPT Thu Mar 31 19:40:39 BST 2022

/home/pi/pigpio# gdb pigpiod
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Reading symbols from pigpiod...
(gdb) run -s 2 -b 200 -f -g
Starting program: /home/pi/pigpio/pigpiod -s 2 -b 200 -f -g
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/aarch64-linux-gnu/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
initPCM (bits=10) at pigpio.c:7841
7841       dmaIVirt[0]->periphData = 0x0F;

[guymcswain]

This is 64-bit os. Have you tried 32-bit?

[lane-maxwell]

@guymcswain I just reimaged to a 32-bit OS and it works as expected, so this only exists in the 64-bit version.