Annotation of sys/compat/freebsd/freebsd_ptrace.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: freebsd_ptrace.c,v 1.6 2003/06/02 23:28:00 millert Exp $ */
! 2: /* $NetBSD: freebsd_ptrace.c,v 1.2 1996/05/03 17:03:12 christos Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1994 Christopher G. Demetriou. All rights reserved.
! 6: * Copyright (c) 1982, 1986, 1989, 1993
! 7: * The Regents of the University of California. All rights reserved.
! 8: * (c) UNIX System Laboratories, Inc.
! 9: * All or some portions of this file are derived from material licensed
! 10: * to the University of California by American Telephone and Telegraph
! 11: * Co. or Unix System Laboratories, Inc. and are reproduced herein with
! 12: * the permission of UNIX System Laboratories, Inc.
! 13: *
! 14: * Redistribution and use in source and binary forms, with or without
! 15: * modification, are permitted provided that the following conditions
! 16: * are met:
! 17: * 1. Redistributions of source code must retain the above copyright
! 18: * notice, this list of conditions and the following disclaimer.
! 19: * 2. Redistributions in binary form must reproduce the above copyright
! 20: * notice, this list of conditions and the following disclaimer in the
! 21: * documentation and/or other materials provided with the distribution.
! 22: * 3. Neither the name of the University nor the names of its contributors
! 23: * may be used to endorse or promote products derived from this software
! 24: * without specific prior written permission.
! 25: *
! 26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 36: * SUCH DAMAGE.
! 37: *
! 38: * from: @(#)sys_process.c 8.1 (Berkeley) 6/10/93
! 39: */
! 40:
! 41: #include <sys/param.h>
! 42: #include <sys/systm.h>
! 43: #include <sys/proc.h>
! 44: #include <sys/errno.h>
! 45: #include <sys/ptrace.h>
! 46: #include <sys/uio.h>
! 47: #include <sys/user.h>
! 48: #include <sys/mount.h>
! 49: #include <sys/syscallargs.h>
! 50:
! 51: #include <machine/reg.h>
! 52: #include <machine/freebsd_machdep.h>
! 53:
! 54: #include <compat/freebsd/freebsd_signal.h>
! 55: #include <compat/freebsd/freebsd_syscallargs.h>
! 56: #include <compat/freebsd/freebsd_util.h>
! 57: #include <compat/freebsd/freebsd_ptrace.h>
! 58:
! 59: /*
! 60: * Process debugging system call.
! 61: */
! 62: int
! 63: freebsd_sys_ptrace(p, v, retval)
! 64: struct proc *p;
! 65: void *v;
! 66: register_t *retval;
! 67: {
! 68: struct freebsd_sys_ptrace_args /* {
! 69: syscallarg(int) req;
! 70: syscallarg(pid_t) pid;
! 71: syscallarg(caddr_t) addr;
! 72: syscallarg(int) data;
! 73: } */ *uap = v;
! 74: int error;
! 75: caddr_t sg;
! 76: struct {
! 77: struct reg regs;
! 78: struct fpreg fpregs;
! 79: } *nrp;
! 80: struct sys_ptrace_args npa;
! 81: struct freebsd_ptrace_reg fr;
! 82:
! 83: switch (SCARG(uap, req)) {
! 84: #ifdef PT_STEP
! 85: case FREEBSD_PT_STEP:
! 86: SCARG(&npa, req) = PT_STEP;
! 87: SCARG(&npa, pid) = SCARG(uap, pid);
! 88: SCARG(&npa, addr) = SCARG(uap, addr);
! 89: SCARG(&npa, data) = SCARG(uap, data);
! 90: return sys_ptrace(p, &npa, retval);
! 91: #endif
! 92: case FREEBSD_PT_TRACE_ME:
! 93: case FREEBSD_PT_READ_I:
! 94: case FREEBSD_PT_READ_D:
! 95: case FREEBSD_PT_WRITE_I:
! 96: case FREEBSD_PT_WRITE_D:
! 97: case FREEBSD_PT_CONTINUE:
! 98: case FREEBSD_PT_KILL:
! 99: /* These requests are compatible with NetBSD */
! 100: return sys_ptrace(p, uap, retval);
! 101:
! 102: case FREEBSD_PT_READ_U:
! 103: case FREEBSD_PT_WRITE_U:
! 104: sg = stackgap_init(p->p_emul);
! 105: nrp = stackgap_alloc(&sg, sizeof(*nrp));
! 106: SCARG(&npa, req) = PT_GETREGS;
! 107: SCARG(&npa, pid) = SCARG(uap, pid);
! 108: SCARG(&npa, addr) = (caddr_t)&nrp->regs;
! 109: if ((error = sys_ptrace(p, &npa, retval)) != 0)
! 110: return error;
! 111: #ifdef PT_GETFPREGS
! 112: SCARG(&npa, req) = PT_GETFPREGS;
! 113: SCARG(&npa, pid) = SCARG(uap, pid);
! 114: SCARG(&npa, addr) = (caddr_t)&nrp->fpregs;
! 115: if ((error = sys_ptrace(p, &npa, retval)) != 0)
! 116: return error;
! 117: #endif
! 118: netbsd_to_freebsd_ptrace_regs(&nrp->regs, &nrp->fpregs, &fr);
! 119: switch (SCARG(uap, req)) {
! 120: case FREEBSD_PT_READ_U:
! 121: return freebsd_ptrace_getregs(&fr, SCARG(uap, addr),
! 122: retval);
! 123:
! 124: case FREEBSD_PT_WRITE_U:
! 125: error = freebsd_ptrace_setregs(&fr,
! 126: SCARG(uap, addr), SCARG(uap, data));
! 127: if (error)
! 128: return error;
! 129: freebsd_to_netbsd_ptrace_regs(&fr,
! 130: &nrp->regs, &nrp->fpregs);
! 131: SCARG(&npa, req) = PT_SETREGS;
! 132: SCARG(&npa, pid) = SCARG(uap, pid);
! 133: SCARG(&npa, addr) = (caddr_t)&nrp->regs;
! 134: if ((error = sys_ptrace(p, &npa, retval)) != 0)
! 135: return error;
! 136: #ifdef PT_SETFPREGS
! 137: SCARG(&npa, req) = PT_SETFPREGS;
! 138: SCARG(&npa, pid) = SCARG(uap, pid);
! 139: SCARG(&npa, addr) = (caddr_t)&nrp->fpregs;
! 140: if ((error = sys_ptrace(p, &npa, retval)) != 0)
! 141: return error;
! 142: #endif
! 143: return 0;
! 144: }
! 145:
! 146: default: /* It was not a legal request. */
! 147: return (EINVAL);
! 148: }
! 149:
! 150: #ifdef DIAGNOSTIC
! 151: panic("freebsd_ptrace: impossible");
! 152: #endif
! 153: }
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