X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/91447636331957f3d9b5ca5b508f07c526b0074d..813fb2f63a553c957e917ede5f119b021d6ce391:/osfmk/mach/i386/syscall_sw.h diff --git a/osfmk/mach/i386/syscall_sw.h b/osfmk/mach/i386/syscall_sw.h index 1ee827e0f..abef968a7 100644 --- a/osfmk/mach/i386/syscall_sw.h +++ b/osfmk/mach/i386/syscall_sw.h @@ -1,23 +1,29 @@ /* - * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * - * The contents of this file constitute Original Code as defined in and - * are subject to the Apple Public Source License Version 1.1 (the - * "License"). You may not use this file except in compliance with the - * License. Please obtain a copy of the License at - * http://www.apple.com/publicsource and read it before using this file. + * 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. * - * This Original Code and all software distributed under the License are - * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * 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 OR NON-INFRINGEMENT. Please see the - * License for the specific language governing rights and limitations - * under the License. + * 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_LICENSE_HEADER_END@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ @@ -47,9 +53,6 @@ * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ -/* - */ - #ifdef PRIVATE #ifndef _MACH_I386_SYSCALL_SW_H_ @@ -57,14 +60,111 @@ #include -#define MACHCALLSEL $0x07 +/* + * Software interrupt codes for 32-bit system call entry: + */ +#define UNIX_INT 0x80 +#define MACH_INT 0x81 +#define MACHDEP_INT 0x82 +#define DIAG_INT 0x83 + +#if defined(__i386__) + +#ifndef KERNEL +/* + * Syscall entry macros for use in libc: + */ +#define UNIX_SYSCALL_TRAP \ + int $(UNIX_INT) +#define MACHDEP_SYSCALL_TRAP \ + int $(MACHDEP_INT) + +/* + * Macro to generate Mach call stubs in libc: + */ #define kernel_trap(trap_name,trap_number,number_args) \ LEAF(_##trap_name,0) ;\ - movl $##trap_number,%eax ;\ - lcall MACHCALLSEL, $0 ;\ + movl $##trap_number, %eax ;\ + call __sysenter_trap ;\ END(_##trap_name) +#endif /* !KERNEL */ + +#endif /* defined(__i386__) */ + +#if defined(__x86_64__) + +#ifndef KERNEL + +#define UNIX_SYSCALL_TRAP \ + syscall +#define MACHDEP_SYSCALL_TRAP \ + syscall + +/* + * Macro to generate Mach call stubs in Libc. + * Existing calls use negative numbers for Mach traps, so + * until we change those and change the 32-bit kernel_trap + * macro above, we negate those numbers here for the 64-bit + * code path. + */ +#define kernel_trap(trap_name,trap_number,number_args) \ +LEAF(_##trap_name,0) ;\ + movq %rcx, %r10 ;\ + movl $ SYSCALL_CONSTRUCT_MACH(-##trap_number), %eax ;\ + syscall ;\ +END(_##trap_name) + +#endif /* !KERNEL */ + +#endif /* defined(__x86_64__) */ + +/* + * Syscall classes for 64-bit system call entry. + * For 64-bit users, the 32-bit syscall number is partitioned + * with the high-order bits representing the class and low-order + * bits being the syscall number within that class. + * The high-order 32-bits of the 64-bit syscall number are unused. + * All system classes enter the kernel via the syscall instruction. + * + * These are not #ifdef'd for x86-64 because they might be used for + * 32-bit someday and so the 64-bit comm page in a 32-bit kernel + * can use them. + */ +#define SYSCALL_CLASS_SHIFT 24 +#define SYSCALL_CLASS_MASK (0xFF << SYSCALL_CLASS_SHIFT) +#define SYSCALL_NUMBER_MASK (~SYSCALL_CLASS_MASK) + +#define I386_SYSCALL_CLASS_MASK SYSCALL_CLASS_MASK +#define I386_SYSCALL_ARG_BYTES_SHIFT (16) +#define I386_SYSCALL_ARG_DWORDS_SHIFT (I386_SYSCALL_ARG_BYTES_SHIFT + 2) +#define I386_SYSCALL_ARG_BYTES_NUM (64) /* Must be <= sizeof(uu_arg) */ +#define I386_SYSCALL_ARG_DWORDS_MASK ((I386_SYSCALL_ARG_BYTES_NUM >> 2) -1) +#define I386_SYSCALL_ARG_BYTES_MASK (((I386_SYSCALL_ARG_BYTES_NUM -1)&~0x3) << I386_SYSCALL_ARG_BYTES_SHIFT) +#define I386_SYSCALL_NUMBER_MASK (0xFFFF) + +#define SYSCALL_CLASS_NONE 0 /* Invalid */ +#define SYSCALL_CLASS_MACH 1 /* Mach */ +#define SYSCALL_CLASS_UNIX 2 /* Unix/BSD */ +#define SYSCALL_CLASS_MDEP 3 /* Machine-dependent */ +#define SYSCALL_CLASS_DIAG 4 /* Diagnostics */ +#define SYSCALL_CLASS_IPC 5 /* Mach IPC */ + +/* Macros to simpllfy constructing syscall numbers. */ +#define SYSCALL_CONSTRUCT_MACH(syscall_number) \ + ((SYSCALL_CLASS_MACH << SYSCALL_CLASS_SHIFT) | \ + (SYSCALL_NUMBER_MASK & (syscall_number))) +#define SYSCALL_CONSTRUCT_UNIX(syscall_number) \ + ((SYSCALL_CLASS_UNIX << SYSCALL_CLASS_SHIFT) | \ + (SYSCALL_NUMBER_MASK & (syscall_number))) +#define SYSCALL_CONSTRUCT_MDEP(syscall_number) \ + ((SYSCALL_CLASS_MDEP << SYSCALL_CLASS_SHIFT) | \ + (SYSCALL_NUMBER_MASK & (syscall_number))) +#define SYSCALL_CONSTRUCT_DIAG(syscall_number) \ + ((SYSCALL_CLASS_DIAG << SYSCALL_CLASS_SHIFT) | \ + (SYSCALL_NUMBER_MASK & (syscall_number))) + #endif /* _MACH_I386_SYSCALL_SW_H_ */ #endif /* PRIVATE */