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deal with dbregs for fork etc

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update for fpu.c simplification
Merge #include sort from i386
This commit is contained in:
peter 2004-01-28 23:58:55 +00:00
parent d21d093f70
commit 1ad435de38
1 changed files with 25 additions and 17 deletions
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42
sys/amd64/amd64/vm_machdep.c
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@ -45,38 +45,38 @@ __FBSDID("$FreeBSD$");
#include "opt_isa.h"
#include "opt_kstack_pages.h"
#include "opt_cpu.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/kse.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/vnode.h>
#include <sys/vmmeter.h>
#include <sys/kse.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/sf_buf.h>
#include <sys/smp.h>
#include <sys/sysctl.h>
#include <sys/unistd.h>
#include <sys/user.h>
#include <sys/vnode.h>
#include <sys/vmmeter.h>
#include <machine/cpu.h>
#include <machine/md_var.h>
#include <machine/pcb.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <sys/lock.h>
#include <vm/vm_extern.h>
#include <vm/vm_kern.h>
#include <vm/vm_page.h>
#include <vm/vm_map.h>
#include <vm/vm_extern.h>
#include <sys/user.h>
#include <vm/vm_param.h>
#include <amd64/isa/isa.h>
@ -115,17 +115,13 @@ cpu_fork(td1, p2, td2, flags)
register struct proc *p1;
struct pcb *pcb2;
struct mdproc *mdp2;
register_t savecrit;
p1 = td1->td_proc;
if ((flags & RFPROC) == 0)
return;
/* Ensure that p1's pcb is up to date. */
savecrit = intr_disable();
if (PCPU_GET(fpcurthread) == td1)
fpusave(&td1->td_pcb->pcb_save);
intr_restore(savecrit);
fpuexit(td1);
/* Point the pcb to the top of the stack */
pcb2 = (struct pcb *)(td2->td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
@ -162,6 +158,7 @@ cpu_fork(td1, p2, td2, flags)
pcb2->pcb_rip = (register_t)fork_trampoline;
pcb2->pcb_rflags = td2->td_frame->tf_rflags & ~PSL_I; /* ints disabled */
/*-
* pcb2->pcb_dr*: cloned above.
* pcb2->pcb_savefpu: cloned above.
* pcb2->pcb_flags: cloned above.
* pcb2->pcb_onfault: cloned above (always NULL here?).
@ -202,17 +199,27 @@ cpu_set_fork_handler(td, func, arg)
void
cpu_exit(struct thread *td)
{
struct mdproc *mdp;
struct pcb *pcb = td->td_pcb;
mdp = &td->td_proc->p_md;
if (pcb->pcb_flags & PCB_DBREGS) {
/* disable all hardware breakpoints */
reset_dbregs();
pcb->pcb_flags &= ~PCB_DBREGS;
}
}
void
cpu_thread_exit(struct thread *td)
{
struct pcb *pcb = td->td_pcb;
if (td == PCPU_GET(fpcurthread))
fpudrop();
if (pcb->pcb_flags & PCB_DBREGS) {
/* disable all hardware breakpoints */
reset_dbregs();
pcb->pcb_flags &= ~PCB_DBREGS;
}
}
void
@ -296,6 +303,7 @@ cpu_set_upcall(struct thread *td, struct thread *td0)
pcb2->pcb_rflags = PSL_KERNEL; /* ints disabled */
/*
* If we didn't copy the pcb, we'd need to do the following registers:
* pcb2->pcb_dr*: cloned above.
* pcb2->pcb_savefpu: cloned above.
* pcb2->pcb_rflags: cloned above.
* pcb2->pcb_onfault: cloned above (always NULL here?).