mirror/freebsd
1
0
Fork 0
mirror of https://git.FreeBSD.org/src.git synced 2024-12-12 09:58:36 +00:00
Code Issues Releases Activity

- Set the version number in the mcontext in get_mcontext and check it in

Browse Source 
set_mcontext.
- Don't make assumptions about the alignment of the mcontext inside of the
  ucontext; we have to save the floating point registers to the pcb and then
  copy to the mcontext.
This commit is contained in:
Jake Burkholder 2003-04-01 23:18:13 +00:00
parent 00c301540e
commit 6e1e13b5e0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=112961
1 changed files with 9 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
sys/sparc64/sparc64/machdep.c
View File

@ -518,15 +518,17 @@ get_mcontext(struct thread *td, mcontext_t *mc)
struct trapframe *tf;
struct pcb *pcb;
if (((uintptr_t)mc & (64 - 1)) != 0)
return (EINVAL);
tf = td->td_frame;
pcb = td->td_pcb;
bcopy(tf, mc, sizeof(*tf));
mc->mc_flags = _MC_VERSION;
critical_enter();
if ((tf->tf_fprs & FPRS_FEF) != 0)
savefpctx(mc->mc_fp);
else if ((pcb->pcb_flags & PCB_FEF) != 0) {
if ((tf->tf_fprs & FPRS_FEF) != 0) {
savefpctx(pcb->pcb_ufp);
tf->tf_fprs &= ~FPRS_FEF;
pcb->pcb_flags |= PCB_FEF;
}
if ((pcb->pcb_flags & PCB_FEF) != 0) {
bcopy(pcb->pcb_ufp, mc->mc_fp, sizeof(*mc->mc_fp));
mc->mc_fprs |= FPRS_FEF;
}
@ -541,7 +543,8 @@ set_mcontext(struct thread *td, const mcontext_t *mc)
struct pcb *pcb;
uint64_t wstate;
if (!TSTATE_SECURE(mc->mc_tstate))
if (!TSTATE_SECURE(mc->mc_tstate) ||
(mc->mc_flags & ((1L << _MC_VERSION_BITS) - 1)) != _MC_VERSION)
return (EINVAL);
tf = td->td_frame;
pcb = td->td_pcb;