With the riscv/litex port, we're able to access the TIME and TIMEH CSRs in usermode. I would like to take advantage of this feature to replace the proxies for syscalls, such as timer_gettime with an equivalent implementation that avoids a context switch, where appropriate.
I understand that th syscall.csv database is used to generate the syscall proxies and stubs, but there doesn't seem to be any facility to provide a different implementation. Potentially, I could remove the desired syscalls from syscall.csv and provide my own proxy which is linked into libproxies but it would be nice if this was more generally supported, rather than patching the kernel locally. I'd be interested to know if anyone has had a similar idea, or potentially there is a method to achieve this in Nuttx which I have overlooked. -- *Kind regards,* *Stuart Ianna* *Firmware Engineer* -- *MoTeC Pty Ltd* 121 Merrindale Drive Croydon South 3136 Victoria Australia *T: *61 3 9761 5050 *W: *www.motec.com.au <https://www.motec.com.au/> -- <http://www.facebook.com/motec.global> <http://www.youtube.com/user/MoTeCAustralia> <https://www.instagram.com/motec_global/> <https://www.linkedin.com/company/motec-global> -- <https://www.thebatteryshow.eu/en/home.html> -- Disclaimer Notice: This message, including any attachments, contains confidential information intended for a specific individual and purpose and is protected by law. If you are not the intended recipient you should delete this message. Any disclosure, copying, or distribution of this message or the taking of any action based on it is strictly prohibited.
