10e6594a8SSascha Wildner /*
20e6594a8SSascha Wildner * Copyright (c) 1993
30e6594a8SSascha Wildner * The Regents of the University of California. All rights reserved.
40e6594a8SSascha Wildner * Copyright (c) 1993 Jan-Simon Pendry
50e6594a8SSascha Wildner *
60e6594a8SSascha Wildner * This code is derived from software contributed to Berkeley by
70e6594a8SSascha Wildner * Jan-Simon Pendry.
80e6594a8SSascha Wildner *
90e6594a8SSascha Wildner * Redistribution and use in source and binary forms, with or without
100e6594a8SSascha Wildner * modification, are permitted provided that the following conditions
110e6594a8SSascha Wildner * are met:
120e6594a8SSascha Wildner * 1. Redistributions of source code must retain the above copyright
130e6594a8SSascha Wildner * notice, this list of conditions and the following disclaimer.
140e6594a8SSascha Wildner * 2. Redistributions in binary form must reproduce the above copyright
150e6594a8SSascha Wildner * notice, this list of conditions and the following disclaimer in the
160e6594a8SSascha Wildner * documentation and/or other materials provided with the distribution.
17*2c64e990Szrj * 3. Neither the name of the University nor the names of its contributors
180e6594a8SSascha Wildner * may be used to endorse or promote products derived from this software
190e6594a8SSascha Wildner * without specific prior written permission.
200e6594a8SSascha Wildner *
210e6594a8SSascha Wildner * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
220e6594a8SSascha Wildner * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
230e6594a8SSascha Wildner * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
240e6594a8SSascha Wildner * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
250e6594a8SSascha Wildner * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
260e6594a8SSascha Wildner * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
270e6594a8SSascha Wildner * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
280e6594a8SSascha Wildner * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
290e6594a8SSascha Wildner * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
300e6594a8SSascha Wildner * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
310e6594a8SSascha Wildner * SUCH DAMAGE.
320e6594a8SSascha Wildner *
330e6594a8SSascha Wildner * @(#)procfs_machdep.c 8.3 (Berkeley) 1/27/94
340e6594a8SSascha Wildner *
350e6594a8SSascha Wildner * From:
360e6594a8SSascha Wildner * $FreeBSD: src/sys/i386/i386/procfs_machdep.c,v 1.14 1999/10/11 14:50:03 peter Exp $
370e6594a8SSascha Wildner * $DragonFly: src/sys/platform/pc64/amd64/procfs_machdep.c,v 1.2 2007/09/24 03:24:45 yanyh Exp $
380e6594a8SSascha Wildner */
390e6594a8SSascha Wildner
400e6594a8SSascha Wildner /*
410e6594a8SSascha Wildner * Functions to be implemented here are:
420e6594a8SSascha Wildner *
430e6594a8SSascha Wildner * procfs_read_regs(lwp, regs)
440e6594a8SSascha Wildner * Get the current user-visible register set from the process
450e6594a8SSascha Wildner * and copy it into the regs structure (<machine/reg.h>).
460e6594a8SSascha Wildner * The process is stopped at the time read_regs is called.
470e6594a8SSascha Wildner *
480e6594a8SSascha Wildner * procfs_write_regs(lwp, regs)
490e6594a8SSascha Wildner * Update the current register set from the passed in regs
500e6594a8SSascha Wildner * structure. Take care to avoid clobbering special CPU
510e6594a8SSascha Wildner * registers or privileged bits in the PSL.
520e6594a8SSascha Wildner * Depending on the architecture this may have fix-up work to do,
530e6594a8SSascha Wildner * especially if the IAR or PCW are modified.
540e6594a8SSascha Wildner * The process is stopped at the time write_regs is called.
550e6594a8SSascha Wildner *
560e6594a8SSascha Wildner * procfs_read_fpregs, procfs_write_fpregs
570e6594a8SSascha Wildner * deal with the floating point register set, otherwise as above.
580e6594a8SSascha Wildner *
590e6594a8SSascha Wildner * procfs_read_dbregs, procfs_write_dbregs
600e6594a8SSascha Wildner * deal with the processor debug register set, otherwise as above.
610e6594a8SSascha Wildner *
620e6594a8SSascha Wildner * procfs_sstep(lwp)
630e6594a8SSascha Wildner * Arrange for the process to trap after executing a single instruction.
640e6594a8SSascha Wildner *
650e6594a8SSascha Wildner */
660e6594a8SSascha Wildner
670e6594a8SSascha Wildner #include <sys/param.h>
680e6594a8SSascha Wildner #include <sys/proc.h>
690e6594a8SSascha Wildner #include <sys/ptrace.h>
700e6594a8SSascha Wildner #include <sys/vnode.h>
710e6594a8SSascha Wildner #include <sys/reg.h>
720e6594a8SSascha Wildner #include <machine/md_var.h>
730e6594a8SSascha Wildner #include <vfs/procfs/procfs.h>
740e6594a8SSascha Wildner
750e6594a8SSascha Wildner #include <vm/vm.h>
760e6594a8SSascha Wildner #include <sys/lock.h>
770e6594a8SSascha Wildner #include <vm/pmap.h>
780e6594a8SSascha Wildner #include <vm/vm_map.h>
790e6594a8SSascha Wildner
800e6594a8SSascha Wildner int
procfs_read_regs(struct lwp * lp,struct reg * regs)810e6594a8SSascha Wildner procfs_read_regs(struct lwp *lp, struct reg *regs)
820e6594a8SSascha Wildner {
830e6594a8SSascha Wildner return (fill_regs(lp, regs));
840e6594a8SSascha Wildner }
850e6594a8SSascha Wildner
860e6594a8SSascha Wildner int
procfs_write_regs(struct lwp * lp,struct reg * regs)870e6594a8SSascha Wildner procfs_write_regs(struct lwp *lp, struct reg *regs)
880e6594a8SSascha Wildner {
890e6594a8SSascha Wildner return (set_regs(lp, regs));
900e6594a8SSascha Wildner }
910e6594a8SSascha Wildner
920e6594a8SSascha Wildner int
procfs_read_dbregs(struct lwp * lp,struct dbreg * dbregs)930e6594a8SSascha Wildner procfs_read_dbregs(struct lwp *lp, struct dbreg *dbregs)
940e6594a8SSascha Wildner {
950e6594a8SSascha Wildner return (fill_dbregs(lp, dbregs));
960e6594a8SSascha Wildner }
970e6594a8SSascha Wildner
980e6594a8SSascha Wildner int
procfs_write_dbregs(struct lwp * lp,struct dbreg * dbregs)990e6594a8SSascha Wildner procfs_write_dbregs(struct lwp *lp, struct dbreg *dbregs)
1000e6594a8SSascha Wildner {
1010e6594a8SSascha Wildner return (set_dbregs(lp, dbregs));
1020e6594a8SSascha Wildner }
1030e6594a8SSascha Wildner
1040e6594a8SSascha Wildner /*
1050e6594a8SSascha Wildner * Ptrace doesn't support fpregs at all, and there are no security holes
1060e6594a8SSascha Wildner * or translations for fpregs, so we can just copy them.
1070e6594a8SSascha Wildner */
1080e6594a8SSascha Wildner
1090e6594a8SSascha Wildner int
procfs_read_fpregs(struct lwp * lp,struct fpreg * fpregs)1100e6594a8SSascha Wildner procfs_read_fpregs(struct lwp *lp, struct fpreg *fpregs)
1110e6594a8SSascha Wildner {
1120e6594a8SSascha Wildner return (fill_fpregs(lp, fpregs));
1130e6594a8SSascha Wildner }
1140e6594a8SSascha Wildner
1150e6594a8SSascha Wildner int
procfs_write_fpregs(struct lwp * lp,struct fpreg * fpregs)1160e6594a8SSascha Wildner procfs_write_fpregs(struct lwp *lp, struct fpreg *fpregs)
1170e6594a8SSascha Wildner {
1180e6594a8SSascha Wildner return (set_fpregs(lp, fpregs));
1190e6594a8SSascha Wildner }
1200e6594a8SSascha Wildner
1210e6594a8SSascha Wildner int
procfs_sstep(struct lwp * lp)1220e6594a8SSascha Wildner procfs_sstep(struct lwp *lp)
1230e6594a8SSascha Wildner {
1240e6594a8SSascha Wildner return (ptrace_single_step(lp));
1250e6594a8SSascha Wildner }
126