X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/b0d623f7f2ae71ed96e60569f61f9a9a27016e80..refs/heads/master:/osfmk/i386/asm.h diff --git a/osfmk/i386/asm.h b/osfmk/i386/asm.h index 02a5620ae..17b28bc99 100644 --- a/osfmk/i386/asm.h +++ b/osfmk/i386/asm.h @@ -1,8 +1,8 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2018 Apple Computer, 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 @@ -11,10 +11,10 @@ * 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, @@ -22,34 +22,34 @@ * 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) 1991,1990,1989 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. */ @@ -57,21 +57,6 @@ #ifndef _I386_ASM_H_ #define _I386_ASM_H_ -#ifdef _KERNEL -#include -#endif /* _KERNEL */ - -#ifdef MACH_KERNEL -#include -#else /* !MACH_KERNEL */ -#define MACH_KDB 0 -#endif /* !MACH_KERNEL */ - - -#if defined(MACH_KERNEL) || defined(_KERNEL) -#include -#endif /* MACH_KERNEL || _KERNEL */ - #if defined(__i386__) #define S_PC (%esp) @@ -106,9 +91,9 @@ #endif /* There is another definition of ALIGN for .c sources */ -#ifdef ASSEMBLER +#ifdef __ASSEMBLER__ #define ALIGN 4,0x90 -#endif /* ASSEMBLER */ +#endif /* __ASSEMBLER__ */ #ifndef FALIGN #define FALIGN ALIGN @@ -160,10 +145,9 @@ #define data16 .byte 0x66 #define addr16 .byte 0x67 -#if !GPROF #define MCOUNT -#elif defined(__SHARED__) +#if defined(__SHARED__) #define MCOUNT ; .data;\ .align ALIGN;\ LBc(x, 8) .long 0;\ @@ -174,10 +158,7 @@ Egaddr(%eax,_mcount_ptr);\ Gpop;\ call *(%eax); - -#else /* !GPROF, !__SHARED__ */ -#define MCOUNT ; call mcount; -#endif /* GPROF */ +#endif /* __SHARED__ */ #ifdef __ELF__ #define ELF_FUNC(x) .type x,@function @@ -284,17 +265,7 @@ #define Lgmemload(lab,reg) movl Lgotoff(lab),reg #define Lgmemstore(reg,lab,tmp) movl reg,Lgotoff(lab) -#ifdef ASSEMBLER -#if MACH_KDB -#include -/* - * This pseudo-assembler line is added so that there will be at least - * one N_SO entry in the symbol stable to define the current file name. - */ -#endif /* MACH_KDB */ - -#else /* NOT ASSEMBLER */ - +#ifndef __ASSEMBLER__ /* These defines are here for .c files that wish to reference global symbols * within __asm__ statements. */ @@ -303,6 +274,107 @@ #else #define CC_SYM_PREFIX "" #endif /* __NO_UNDERSCORES__ */ -#endif /* ASSEMBLER */ +#endif /* __ASSEMBLER__ */ + +/* + * The following macros make calls into C code. + * They dynamically align the stack to 16 bytes. + */ +#if defined(__i386__) +/* + * Arguments are moved (not pushed) onto the correctly aligned stack. + * NOTE: ESI is destroyed in the process, and hence cannot + * be directly used as a parameter. Users of this macro must + * independently preserve ESI (a non-volatile) if the routine is + * intended to be called from C, for instance. + */ + +#define CCALL(fn) \ + movl %esp, %esi ;\ + andl $0xFFFFFFF0, %esp ;\ + call EXT(fn) ;\ + movl %esi, %esp + +#define CCALL1(fn, arg1) \ + movl %esp, %esi ;\ + subl $4, %esp ;\ + andl $0xFFFFFFF0, %esp ;\ + movl arg1, (%esp) ;\ + call EXT(fn) ;\ + movl %esi, %esp + +#define CCALL2(fn, arg1, arg2) \ + movl %esp, %esi ;\ + subl $8, %esp ;\ + andl $0xFFFFFFF0, %esp ;\ + movl arg2, 4(%esp) ;\ + movl arg1, (%esp) ;\ + call EXT(fn) ;\ + movl %esi, %esp + +/* This variant exists to permit adjustment of the stack by "dtrace" */ +#define CCALL1WITHSP(fn, arg1) \ + movl %esp, %esi ;\ + subl $12, %esp ;\ + andl $0xFFFFFFF0, %esp ;\ + movl %esi, 8(%esp) ;\ + leal 8(%esp), %esi ;\ + movl %esi, 4(%esp) ;\ + movl arg1, (%esp) ;\ + call EXT(fn) ;\ + movl 8(%esp), %esp + +/* + * CCALL5 is used for callee functions with 3 arguments but + * where arg2 (a3:a2) and arg3 (a5:a4) are 64-bit values. + */ +#define CCALL5(fn, a1, a2, a3, a4, a5) \ + movl %esp, %esi ;\ + subl $20, %esp ;\ + andl $0xFFFFFFF0, %esp ;\ + movl a5, 16(%esp) ;\ + movl a4, 12(%esp) ;\ + movl a3, 8(%esp) ;\ + movl a2, 4(%esp) ;\ + movl a1, (%esp) ;\ + call EXT(fn) ;\ + movl %esi, %esp + +#elif defined(__x86_64__) + +/* This variant exists to permit adjustment of the stack by "dtrace" */ +#define CCALLWITHSP(fn) \ + mov %rsp, %r12 ;\ + sub $8, %rsp ;\ + and $0xFFFFFFFFFFFFFFF0, %rsp ;\ + mov %r12, (%rsp) ;\ + leaq (%rsp), %rsi ;\ + call EXT(fn) ;\ + mov (%rsp), %rsp + +#define CCALL(fn) \ + mov %rsp, %r12 ;\ + and $0xFFFFFFFFFFFFFFF0, %rsp ;\ + call EXT(fn) ;\ + mov %r12, %rsp + +#define CCALL1(fn, arg1) \ + mov arg1, %rdi ;\ + CCALL(fn) + +#define CCALL2(fn, arg1, arg2) \ + mov arg1, %rdi ;\ + mov arg2, %rsi ;\ + CCALL(fn) + +#define CCALL3(fn, arg1, arg2, arg3) \ + mov arg1, %rdi ;\ + mov arg2, %rsi ;\ + mov arg3, %rdx ;\ + CCALL(fn) + +#else +#error unsupported architecture +#endif #endif /* _I386_ASM_H_ */