CVS commit: src/sys/arch/powerpc

["Jason R Thorpe" <thorpej%netbsd.org@localhost>]

Module Name:    src
Committed By:   thorpej
Date:           Sat Oct 30 19:44:56 UTC 2021

Modified Files:
        src/sys/arch/powerpc/oea: altivec.c
        src/sys/arch/powerpc/powerpc: compat_16_machdep.c

Log Message:
- In vec_restore_from_mcontext() and vec_save_to_mcontext(), allows the
  mcontext argument to be NULL.
- In sendsig_sigcontext(), don't set PSL_VEC in the saved MSR; we can't
  actually round-trip the AltiVec registers.  At least get them saved
  into the PCB by calling vec_save_to_mcontext() (with a NULL mcontext
  argument).
- In compat_16_sys___sigreturn14(), call vec_restore_from_mcontext()
  with a NULL mcontext argument, which will force any subsequent use
  of AltiVec to re-load the AltiVec registers from the PCB.

This isn't ideal, but it's the best we can do with the limited capability
of sigcontext.

Fixes PR port-powerpc/56471.


To generate a diff of this commit:
cvs rdiff -u -r1.33 -r1.34 src/sys/arch/powerpc/oea/altivec.c
cvs rdiff -u -r1.21 -r1.22 src/sys/arch/powerpc/powerpc/compat_16_machdep.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.