Subject: SETREGS/SETFPREG & extented register sets
To: None <>
From: Matt Thomas <>
List: tech-kern
Date: 11/19/2000 15:48:11
i386 has MMX
PowerPC has AltiVec
Sparc has VIS
Alpha has CIS

Many/most of these use alternate register sets.  Not only does there need to
kernel support for saving/restoiring these on process context switches, we
all need to dump these in core files but make them accessible for debugging.

However it seems that ptrace(2) and /proc don't have any mechanism for
reading these extention registers.  It seems wrong to includes GETFPREGS since
that would be an interface change.

Matt Thomas               Internet:
3am Software Foundry      WWW URL:
Cupertino, CA             Disclaimer: I avow all knowledge of this message