/*
- * 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@
*
* 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. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * 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
* 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@
* 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_
#include <architecture/i386/asm_help.h>
-#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 */
projects / apple / xnu.git / blobdiff