mirror of
https://github.com/freebsd/freebsd-src
synced 2024-07-22 02:37:15 +00:00
113 lines
3.1 KiB
C
113 lines
3.1 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 1994-1996 Søren Schmidt
|
|
* 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 THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR OR CONTRIBUTORS 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/param.h>
|
|
#include <sys/signal.h>
|
|
#include <x86/specialreg.h>
|
|
#include <x86/trap.h>
|
|
#include <x86/x86_var.h>
|
|
|
|
#include <x86/linux/linux_x86.h>
|
|
|
|
#define LINUX_T_UNKNOWN 255
|
|
static int _bsd_to_linux_trapcode[] = {
|
|
LINUX_T_UNKNOWN, /* 0 */
|
|
6, /* 1 T_PRIVINFLT */
|
|
LINUX_T_UNKNOWN, /* 2 */
|
|
3, /* 3 T_BPTFLT */
|
|
LINUX_T_UNKNOWN, /* 4 */
|
|
LINUX_T_UNKNOWN, /* 5 */
|
|
16, /* 6 T_ARITHTRAP */
|
|
254, /* 7 T_ASTFLT */
|
|
LINUX_T_UNKNOWN, /* 8 */
|
|
13, /* 9 T_PROTFLT */
|
|
1, /* 10 T_TRCTRAP */
|
|
LINUX_T_UNKNOWN, /* 11 */
|
|
14, /* 12 T_PAGEFLT */
|
|
LINUX_T_UNKNOWN, /* 13 */
|
|
17, /* 14 T_ALIGNFLT */
|
|
LINUX_T_UNKNOWN, /* 15 */
|
|
LINUX_T_UNKNOWN, /* 16 */
|
|
LINUX_T_UNKNOWN, /* 17 */
|
|
0, /* 18 T_DIVIDE */
|
|
2, /* 19 T_NMI */
|
|
4, /* 20 T_OFLOW */
|
|
5, /* 21 T_BOUND */
|
|
7, /* 22 T_DNA */
|
|
8, /* 23 T_DOUBLEFLT */
|
|
9, /* 24 T_FPOPFLT */
|
|
10, /* 25 T_TSSFLT */
|
|
11, /* 26 T_SEGNPFLT */
|
|
12, /* 27 T_STKFLT */
|
|
18, /* 28 T_MCHK */
|
|
19, /* 29 T_XMMFLT */
|
|
15 /* 30 T_RESERVED */
|
|
};
|
|
|
|
/*
|
|
* If FreeBSD & Linux have a difference of opinion about what a trap
|
|
* means, deal with it here.
|
|
*/
|
|
int
|
|
linux_translate_traps(int signal, int trap_code)
|
|
{
|
|
if (signal != SIGBUS)
|
|
return (signal);
|
|
switch (trap_code) {
|
|
case T_PROTFLT:
|
|
case T_TSSFLT:
|
|
case T_DOUBLEFLT:
|
|
case T_PAGEFLT:
|
|
return (SIGSEGV);
|
|
default:
|
|
return (signal);
|
|
}
|
|
}
|
|
|
|
int
|
|
bsd_to_linux_trapcode(int code)
|
|
{
|
|
|
|
return (code < nitems(_bsd_to_linux_trapcode) ?
|
|
_bsd_to_linux_trapcode[code] : LINUX_T_UNKNOWN);
|
|
}
|
|
|
|
u_int
|
|
linux_x86_elf_hwcap2(void)
|
|
{
|
|
static u_int elf_hwcap2 = 0;
|
|
static bool elf_hwcap2_valid = false;
|
|
|
|
if (!elf_hwcap2_valid) {
|
|
if ((cpu_stdext_feature & CPUID_STDEXT_FSGSBASE) != 0)
|
|
elf_hwcap2 |= LINUX_HWCAP2_FSGSBASE;
|
|
elf_hwcap2_valid = true;
|
|
}
|
|
return (elf_hwcap2);
|
|
}
|