Author: jhb
Date: Mon Aug 21 17:29:37 2017
New Revision: 322760
URL: https://svnweb.freebsd.org/changeset/base/322760
Log:
MFC 322436: Don't panic for PT_GETFPREGS.
Only fetch the VFP state from the CPU if the thread whose registers are
being requested is the current thread. If a stopped thread's registers
are being fetched by a debugger, the saved state in the PCB is already
valid.
Modified:
stable/11/sys/arm64/arm64/machdep.c
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/arm64/arm64/machdep.c
==============================================================================
--- stable/11/sys/arm64/arm64/machdep.c Mon Aug 21 17:20:31 2017
(r322759)
+++ stable/11/sys/arm64/arm64/machdep.c Mon Aug 21 17:29:37 2017
(r322760)
@@ -213,7 +213,8 @@ fill_fpregs(struct thread *td, struct fpreg *regs)
* If we have just been running VFP instructions we will
* need to save the state to memcpy it below.
*/
- vfp_save_state(td, pcb);
+ if (td == curthread)
+ vfp_save_state(td, pcb);
memcpy(regs->fp_q, pcb->pcb_vfp, sizeof(regs->fp_q));
regs->fp_cr = pcb->pcb_fpcr;
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