Fill the fsbase and gsbase fields of the mcontext structure on i386.

In collaboration with:	pho
Discussed with:	peter
Reviewed by:	jhb
This commit is contained in:
Konstantin Belousov 2009-04-01 12:46:05 +00:00
parent 0cdf4ffabc
commit 6ce76ba376

View File

@ -589,6 +589,7 @@ sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
struct sigacts *psp;
char *sp;
struct trapframe *regs;
struct segment_descriptor *sdp;
int sig;
int oonstack;
@ -625,6 +626,15 @@ sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
sf.sf_uc.uc_mcontext.mc_len = sizeof(sf.sf_uc.uc_mcontext); /* magic */
get_fpcontext(td, &sf.sf_uc.uc_mcontext);
fpstate_drop(td);
/*
* Unconditionally fill the fsbase and gsbase into the mcontext.
*/
sdp = &td->td_pcb->pcb_gsd;
sf.sf_uc.uc_mcontext.mc_fsbase = sdp->sd_hibase << 24 |
sdp->sd_lobase;
sdp = &td->td_pcb->pcb_fsd;
sf.sf_uc.uc_mcontext.mc_gsbase = sdp->sd_hibase << 24 |
sdp->sd_lobase;
/* Allocate space for the signal handler context. */
if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
@ -3078,6 +3088,7 @@ int
get_mcontext(struct thread *td, mcontext_t *mcp, int flags)
{
struct trapframe *tp;
struct segment_descriptor *sdp;
tp = td->td_frame;
@ -3109,6 +3120,11 @@ get_mcontext(struct thread *td, mcontext_t *mcp, int flags)
mcp->mc_ss = tp->tf_ss;
mcp->mc_len = sizeof(*mcp);
get_fpcontext(td, mcp);
sdp = &td->td_pcb->pcb_gsd;
mcp->mc_fsbase = sdp->sd_hibase << 24 | sdp->sd_lobase;
sdp = &td->td_pcb->pcb_fsd;
mcp->mc_gsbase = sdp->sd_hibase << 24 | sdp->sd_lobase;
return (0);
}