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procfs_dbregs.c (85297) procfs_dbregs.c (87321)
1/*-
2 * Copyright (c) 1999 Brian Scott Dean, brdean@unx.sas.com.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Jan-Simon Pendry under the following copyrights and conditions:
7 *
8 * Copyright (c) 1993 Jan-Simon Pendry

--- 26 unchanged lines hidden (view full) ---

35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 * SUCH DAMAGE.
42 *
1/*-
2 * Copyright (c) 1999 Brian Scott Dean, brdean@unx.sas.com.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Jan-Simon Pendry under the following copyrights and conditions:
7 *
8 * Copyright (c) 1993 Jan-Simon Pendry

--- 26 unchanged lines hidden (view full) ---

35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 * SUCH DAMAGE.
42 *
43 * $FreeBSD: head/sys/fs/procfs/procfs_dbregs.c 85297 2001-10-21 23:57:24Z des $
43 * $FreeBSD: head/sys/fs/procfs/procfs_dbregs.c 87321 2001-12-04 01:35:06Z des $
44 */
45
46#include <sys/param.h>
47#include <sys/systm.h>
48#include <sys/lock.h>
49#include <sys/mutex.h>
50#include <sys/proc.h>
51#include <sys/ptrace.h>
44 */
45
46#include <sys/param.h>
47#include <sys/systm.h>
48#include <sys/lock.h>
49#include <sys/mutex.h>
50#include <sys/proc.h>
51#include <sys/ptrace.h>
52#include <sys/vnode.h>
52#include <sys/uio.h>
53
54#include <machine/reg.h>
55
53
54#include <machine/reg.h>
55
56#include <fs/pseudofs/pseudofs.h>
56#include <fs/procfs/procfs.h>
57
57#include <fs/procfs/procfs.h>
58
58#include <vm/vm.h>
59
60int
59int
61procfs_dodbregs(curp, p, pfs, uio)
62 struct proc *curp;
63 struct proc *p;
64 struct pfsnode *pfs;
65 struct uio *uio;
60procfs_doprocdbregs(PFS_FILL_ARGS)
66{
67 int error;
68 struct dbreg r;
69 char *kv;
70 int kl;
71
61{
62 int error;
63 struct dbreg r;
64 char *kv;
65 int kl;
66
72 if (p_candebug(curp, p))
67 if (p_candebug(td->td_proc, p) != 0)
73 return (EPERM);
74 kl = sizeof(r);
75 kv = (char *) &r;
76
77 kv += uio->uio_offset;
78 kl -= uio->uio_offset;
79 if (kl > uio->uio_resid)
80 kl = uio->uio_resid;
81
68 return (EPERM);
69 kl = sizeof(r);
70 kv = (char *) &r;
71
72 kv += uio->uio_offset;
73 kl -= uio->uio_offset;
74 if (kl > uio->uio_resid)
75 kl = uio->uio_resid;
76
82 PHOLD(p);
83
84 if (kl < 0)
85 error = EINVAL;
86 else
87 error = proc_read_dbregs(&p->p_thread, &r); /* XXXKSE */
88 if (error == 0)
89 error = uiomove(kv, kl, uio);
90 if (error == 0 && uio->uio_rw == UIO_WRITE) {
91 if (p->p_stat != SSTOP)
92 error = EBUSY;
93 else
94 error = proc_write_dbregs(&p->p_thread, &r); /* XXXKSE */
95 }
77 if (kl < 0)
78 error = EINVAL;
79 else
80 error = proc_read_dbregs(&p->p_thread, &r); /* XXXKSE */
81 if (error == 0)
82 error = uiomove(kv, kl, uio);
83 if (error == 0 && uio->uio_rw == UIO_WRITE) {
84 if (p->p_stat != SSTOP)
85 error = EBUSY;
86 else
87 error = proc_write_dbregs(&p->p_thread, &r); /* XXXKSE */
88 }
96 PRELE(p);
97
98 uio->uio_offset = 0;
99 return (error);
100}
89
90 uio->uio_offset = 0;
91 return (error);
92}
101
102int
103procfs_validdbregs(struct thread *td)
104{
105
106 return ((td->td_proc->p_flag & P_SYSTEM) == 0);
107}