re: CVS commit: src/sys/kern

[matthew green <mrg%eterna.com.au@localhost>]

"Kamil Rytarowski" writes:
> Module Name:	src
> Committed By:	kamil
> Date:		Wed May  1 17:02:40 UTC 2019
> 
> Modified Files:
> 	src/sys/kern: sys_ptrace_common.c
> 
> Log Message:
> Disallow resuming program with PC=0x0 in ptrace(2)
> 
> If the address parameter is 0, report error.
> It's a popular mistake to set Program Counter to 0x0.
> In certain kernels this is allowable parameter and causes
> portability issue.
> 
> Disallow explicitly zeroed PC, instead of triggering
> a harder to debug crash later.

VA 0 can be valid executable code on some platforms.


.mrg.