/*
* Copyright (c) 2000-2012 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
*/
/*
* Mach Operating System
* Copyright (c) 1991,1990 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
*/
#ifndef _I386_TRAP_H_
#define _I386_TRAP_H_
/*
* Hardware trap vectors for i386.
*/
#define T_DIVIDE_ERROR 0
#define T_DEBUG 1
#define T_NMI 2 /* non-maskable interrupt */
#define T_INT3 3 /* int 3 instruction */
#define T_OVERFLOW 4 /* overflow test */
#define T_OUT_OF_BOUNDS 5 /* bounds check */
#define T_INVALID_OPCODE 6 /* invalid op code */
#define T_NO_FPU 7 /* no floating point */
#define T_DOUBLE_FAULT 8 /* double fault */
#define T_FPU_FAULT 9
#define T_INVALID_TSS 10
#define T_SEGMENT_NOT_PRESENT 11
#define T_STACK_FAULT 12
#define T_GENERAL_PROTECTION 13
#define T_PAGE_FAULT 14
/* 15 */
#define T_FLOATING_POINT_ERROR 16
#define T_WATCHPOINT 17
#define T_MACHINE_CHECK 18
#define T_SSE_FLOAT_ERROR 19
/* 20-126 */
#define T_DTRACE_RET 127
/* The SYSENTER and SYSCALL trap numbers are software constructs.
* These exceptions are dispatched directly to the system call handlers.
* See also the "software interrupt codes" section of
* osfmk/mach/i386/syscall_sw.h
*/
#define T_SYSENTER 0x84
#define T_SYSCALL 0x85
#define T_PREEMPT 255
#define TRAP_NAMES "divide error", "debug trap", "NMI", "breakpoint", \
"overflow", "bounds check", "invalid opcode", \
"no coprocessor", "double fault", "coprocessor overrun", \
"invalid TSS", "segment not present", "stack bounds", \
"general protection", "page fault", "(reserved)", \
"coprocessor error", "watchpoint", "machine check", "SSE floating point"
/*
* Page-fault trap codes.
*/
#define T_PF_PROT 0x1 /* protection violation */
#define T_PF_WRITE 0x2 /* write access */
#define T_PF_USER 0x4 /* from user state */
#define T_PF_RSVD 0x8 /* reserved bit set to 1 */
#define T_PF_EXECUTE 0x10 /* instruction fetch when NX */
#if !defined(ASSEMBLER)
#if __OPTIMIZE__
__attribute__((cold, always_inline))
static inline void
ml_recoverable_trap(unsigned int code)
__attribute__((diagnose_if(!__builtin_constant_p(code), "code must be constant", "error")))
{
__asm__ volatile ("ud1l %0(%%eax), %%eax" : : "p"((void *)((unsigned long long)code)));
}
__attribute__((cold, noreturn, always_inline))
static inline void
ml_fatal_trap(unsigned int code)
__attribute__((diagnose_if(!__builtin_constant_p(code), "code must be constant", "error")))
{
__asm__ volatile ("ud1l %0(%%eax), %%eax" : : "p"((void *)((unsigned long long)code)));
__builtin_unreachable();
}
__attribute__((cold, noreturn, always_inline))
static inline void
ml_fatal_trap_with_value(unsigned int code, unsigned long value)
__attribute__((diagnose_if(!__builtin_constant_p(code), "code must be constant", "error")))
{
register unsigned long long _value __asm__("rax") = value;
__asm__ volatile ("ud1l %[_code](%%eax), %%eax"
: "=r"(_value)
: [_code]"p"((void *)((unsigned long long)code))
, "0"(_value));
__builtin_unreachable();
}
#else
#define ml_recoverable_trap(code) \
__asm__ volatile ("ud1l %0(%%eax), %%eax" : : "p"(code))
#define ml_fatal_trap(code) ({ \
__asm__ volatile ("ud1l %0(%%eax), %%eax" : : "p"(code)); \
__builtin_unreachable(); \
})
#define ml_fatal_trap_with_value(code, value) ({ \
register unsigned long long _value __asm__("rax") = (value); \
__asm__ volatile ("ud1l %[_code](%%eax), %%eax" \
: "=r"(_value) \
: [_code]"p"((void *)((unsigned long long)code)) \
, "0"(_value)); \
__builtin_unreachable(); \
})
#endif
#if defined(XNU_KERNEL_PRIVATE)
__attribute__((cold, always_inline))
static inline void
ml_trap(unsigned int code)
{
__asm__ volatile ("ud1l %0(%%eax), %%eax" : : "p"((void *)((unsigned long long)code)));
}
/* For use by clang option -ftrap-function only */
__attribute__((cold, always_inline))
static inline void
ml_bound_chk_soft_trap(unsigned char code)
{
/* clang mandates arg to be unsigned char */
unsigned int code32 = code;
if (code32 == 0x19) {
/* if we see a bound check trap, implicitly make it soft */
code32 += 0xFF00; /* code defined in kern/telemetry.h */
}
/* let other codes fall through */
ml_trap(code32);
}
#endif /* XNU_KERNEL_PRIVATE */
#endif /* !ASSEMBLER */
#endif /* _I386_TRAP_H_ */