xnu-3789.51.2.tar.gz

[apple/xnu.git] / osfmk / mach / i386 / syscall_sw.h

diff --git a/osfmk/mach/i386/syscall_sw.h b/osfmk/mach/i386/syscall_sw.h
index 95eae090921b49a608da92f7270713a3e215e982..abef968a77077a48bdbe7ae429fd8a163e41aca0 100644 (file)
--- a/osfmk/mach/i386/syscall_sw.h
+++ b/osfmk/mach/i386/syscall_sw.h
@@ -1,31 +1,29 @@
 /*
 /*

- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.

  *
  *

- * @APPLE_LICENSE_OSREFERENCE_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.  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 
+ * 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.
  * limitations under the License.

- *
- * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
+ * 
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@

  */
 /*
  * @OSF_COPYRIGHT@
  */
 /*
  * @OSF_COPYRIGHT@


@@ -55,9 +53,6 @@
  * any improvements or extensions that they make and grant Carnegie Mellon
  * the rights to redistribute these changes.
  */
  * 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_
 #ifdef PRIVATE
 
 #ifndef        _MACH_I386_SYSCALL_SW_H_


@@ -65,14 +60,111 @@
 
 #include <architecture/i386/asm_help.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    ;\
+       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) ;\
 #define kernel_trap(trap_name,trap_number,number_args) \
 LEAF(_##trap_name,0) ;\

-       movl    $##trap_number,%eax   ;\
-        lcall   MACHCALLSEL, $0 ;\
+       movq    %rcx, %r10      ;\
+       movl    $ SYSCALL_CONSTRUCT_MACH(-##trap_number), %eax  ;\
+       syscall         ;\

 END(_##trap_name)
 
 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 */
 #endif /* _MACH_I386_SYSCALL_SW_H_ */
 
 #endif /* PRIVATE */