diff options
Diffstat (limited to 'lib/libc/i386/sys/i386_set_watch.c')
| -rw-r--r-- | lib/libc/i386/sys/i386_set_watch.c | 86 |
1 files changed, 0 insertions, 86 deletions
diff --git a/lib/libc/i386/sys/i386_set_watch.c b/lib/libc/i386/sys/i386_set_watch.c deleted file mode 100644 index 181df83ea2a8..000000000000 --- a/lib/libc/i386/sys/i386_set_watch.c +++ /dev/null @@ -1,86 +0,0 @@ -/*- - * SPDX-License-Identifier: BSD-2-Clause-FreeBSD - * - * Copyright 2000 Brian S. Dean <bsd@bsdhome.com> - * All Rights Reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY BRIAN S. DEAN ``AS IS'' AND ANY - * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BRIAN S. DEAN BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT - * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR - * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF - * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE - * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH - * DAMAGE. - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <machine/reg.h> -#include <machine/sysarch.h> - -int -i386_set_watch(int watchnum, unsigned int watchaddr, int size, - int access, struct dbreg * d) -{ - int i; - unsigned int mask; - - if (watchnum == -1) { - for (i = 0, mask = 0x3; i < 4; i++, mask <<= 2) - if ((DBREG_DRX(d,7) & mask) == 0) - break; - if (i < 4) - watchnum = i; - else - return -1; - } - - switch (access) { - case DBREG_DR7_EXEC: - size = 1; /* size must be 1 for an execution breakpoint */ - /* fall through */ - case DBREG_DR7_WRONLY: - case DBREG_DR7_RDWR: - break; - default : return -1; break; - } - - /* - * we can watch a 1, 2, or 4 byte sized location - */ - switch (size) { - case 1 : mask = 0x00; break; - case 2 : mask = 0x01 << 2; break; - case 4 : mask = 0x03 << 2; break; - default : return -1; break; - } - - mask |= access; - - /* clear the bits we are about to affect */ - DBREG_DRX(d,7) &= ~((0x3 << (watchnum*2)) | (0x0f << (watchnum*4+16))); - - /* set drN register to the address, N=watchnum */ - DBREG_DRX(d,watchnum) = watchaddr; - - /* enable the watchpoint */ - DBREG_DRX(d,7) |= (0x2 << (watchnum*2)) | (mask << (watchnum*4+16)); - - return watchnum; -} |