Subject: VFP, PTRACE and ELF
To: None <firstname.lastname@example.org, email@example.com>
From: Richard Earnshaw <firstname.lastname@example.org>
Date: 02/14/2002 11:26:57
Before we finally switch the ARM ports to ELF I think we need to decide
how a process that is using the PTRACE interface should get the VFP
registers on a machine that has a VFP unit (or emulator) attached.
Has a similar issue (of modifying the "struct reg" or "struct fpreg"
layout) come up on other ports? If I add extra space to the end of struct
fpreg will it break existing applications that try to read or write the
fpreg structure via ptrace()?
If so, is there a way to add new calls to the ptrace interface to read and
write the additional registers?