409 lines
11 KiB
C
409 lines
11 KiB
C
/*
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* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* @OSF_COPYRIGHT@
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*/
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/*
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* Mach Operating System
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* Copyright (c) 1991,1990,1989 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie Mellon
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* the rights to redistribute these changes.
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*/
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#ifndef _I386_ASM_H_
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#define _I386_ASM_H_
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#ifdef _KERNEL
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#include <gprof.h>
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#endif /* _KERNEL */
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#ifdef MACH_KERNEL
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#include <mach_kdb.h>
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#else /* !MACH_KERNEL */
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#define MACH_KDB 0
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#endif /* !MACH_KERNEL */
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#if defined(MACH_KERNEL) || defined(_KERNEL)
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#include <gprof.h>
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#endif /* MACH_KERNEL || _KERNEL */
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#if defined(__i386__)
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#define S_PC (%esp)
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#define S_ARG0 4(%esp)
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#define S_ARG1 8(%esp)
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#define S_ARG2 12(%esp)
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#define S_ARG3 16(%esp)
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#define S_ARG4 20(%esp)
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#define FRAME pushl %ebp; movl %esp, %ebp
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#define EMARF leave
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#define B_LINK (%ebp)
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#define B_PC 4(%ebp)
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#define B_ARG0 8(%ebp)
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#define B_ARG1 12(%ebp)
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#define B_ARG2 16(%ebp)
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#define B_ARG3 20(%ebp)
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#elif defined(__x86_64__)
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#define S_PC (%rsp)
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#define FRAME pushq %rbp; movq %rsp, %rbp
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#define EMARF leave
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#define B_LINK (%rbp)
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#define B_PC 8(%rbp)
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#else
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#error unsupported architecture
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#endif
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/* There is another definition of ALIGN for .c sources */
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#ifdef ASSEMBLER
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#define ALIGN 4,0x90
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#endif /* ASSEMBLER */
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#ifndef FALIGN
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#define FALIGN ALIGN
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#endif
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#define LB(x,n) n
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#if __STDC__
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#ifndef __NO_UNDERSCORES__
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#define LCL(x) L ## x
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#define EXT(x) _ ## x
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#define LEXT(x) _ ## x ## :
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#else
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#define LCL(x) .L ## x
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#define EXT(x) x
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#define LEXT(x) x ## :
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#endif
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#define LBc(x,n) n ## :
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#define LBb(x,n) n ## b
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#define LBf(x,n) n ## f
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#else /* __STDC__ */
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#ifndef __NO_UNDERSCORES__
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#define LCL(x) L/**/x
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#define EXT(x) _/**/x
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#define LEXT(x) _/**/x/**/:
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#else /* __NO_UNDERSCORES__ */
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#define LCL(x) .L/**/x
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#define EXT(x) x
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#define LEXT(x) x/**/:
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#endif /* __NO_UNDERSCORES__ */
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#define LBc(x,n) n/**/:
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#define LBb(x,n) n/**/b
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#define LBf(x,n) n/**/f
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#endif /* __STDC__ */
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#define SVC .byte 0x9a; .long 0; .word 0x7
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#define RPC_SVC .byte 0x9a; .long 0; .word 0xf
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#define String .asciz
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#define Value .word
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#define Times(a,b) (a*b)
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#define Divide(a,b) (a/b)
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#define INB inb %dx, %al
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#define OUTB outb %al, %dx
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#define INL inl %dx, %eax
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#define OUTL outl %eax, %dx
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#define data16 .byte 0x66
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#define addr16 .byte 0x67
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#if !GPROF
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#define MCOUNT
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#elif defined(__SHARED__)
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#define MCOUNT ; .data;\
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.align ALIGN;\
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LBc(x, 8) .long 0;\
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.text;\
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Gpush;\
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Gload;\
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leal Gotoff(LBb(x,8)),%edx;\
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Egaddr(%eax,_mcount_ptr);\
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Gpop;\
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call *(%eax);
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#else /* !GPROF, !__SHARED__ */
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#define MCOUNT ; call mcount;
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#endif /* GPROF */
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#ifdef __ELF__
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#define ELF_FUNC(x) .type x,@function
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#define ELF_DATA(x) .type x,@object
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#define ELF_SIZE(x,s) .size x,s
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#else
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#define ELF_FUNC(x)
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#define ELF_DATA(x)
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#define ELF_SIZE(x,s)
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#endif
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#define Entry(x) .globl EXT(x); ELF_FUNC(EXT(x)); .align FALIGN; LEXT(x)
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#define ENTRY(x) Entry(x) MCOUNT
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#define ENTRY2(x,y) .globl EXT(x); .globl EXT(y); \
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ELF_FUNC(EXT(x)); ELF_FUNC(EXT(y)); \
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.align FALIGN; LEXT(x); LEXT(y) \
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MCOUNT
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#if __STDC__
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#define ASENTRY(x) .globl x; .align FALIGN; x ## : ELF_FUNC(x) MCOUNT
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#else
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#define ASENTRY(x) .globl x; .align FALIGN; x: ELF_FUNC(x) MCOUNT
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#endif /* __STDC__ */
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#define DATA(x) .globl EXT(x); ELF_DATA(EXT(x)); .align ALIGN; LEXT(x)
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#define End(x) ELF_SIZE(x,.-x)
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#define END(x) End(EXT(x))
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#define ENDDATA(x) END(x)
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#define Enddata(x) End(x)
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/*
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* ELF shared library accessor macros.
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* Gpush saves the %ebx register used for the GOT address
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* Gpop pops %ebx if we need a GOT
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* Gload loads %ebx with the GOT address if shared libraries are used
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* Gcall calls an external function.
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* Gotoff allows you to reference local labels.
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* Gotoff2 allows you to reference local labels with an index reg.
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* Gotoff3 allows you to reference local labels with an index reg & size.
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* Gaddr loads up a register with an address of an external item.
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* Gstack is the number of bytes that Gpush pushes on the stack.
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*
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* Varients of the above with E or L prefixes do EXT(name) or LCL(name)
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* respectively.
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*/
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#ifndef __SHARED__
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#define Gpush
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#define Gpop
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#define Gload
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#define Gcall(func) call func
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#define Gotoff(lab) lab
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#define Gotoff2(l,r) l(r)
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#define Gotoff3(l,r,s) l(,r,s)
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#define Gaddr(to,lab) movl $lab,to
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#define Gcmp(lab,reg) cmpl $lab,reg
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#define Gmemload(lab,reg) movl lab,reg
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#define Gmemstore(reg,lab,tmp) movl reg,lab
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#define Gstack 0
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#else
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#ifdef __ELF__ /* ELF shared libraries */
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#define Gpush pushl %ebx
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#define Gpop popl %ebx
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#define Gload call 9f; 9: popl %ebx; addl $_GLOBAL_OFFSET_TABLE_+[.-9b],%ebx
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#define Gcall(func) call EXT(func)@PLT
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#define Gotoff(lab) lab@GOTOFF(%ebx)
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#define Gotoff2(l,r) l@GOTOFF(%ebx,r)
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#define Gotoff3(l,r,s) l@GOTOFF(%ebx,r,s)
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#define Gaddr(to,lab) movl lab@GOT(%ebx),to
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#define Gcmp(lab,reg) cmpl reg,lab@GOT(%ebx)
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#define Gmemload(lab,reg) movl lab@GOT(%ebx),reg; movl (reg),reg
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#define Gmemstore(reg,lab,tmp) movl lab@GOT(%ebx),tmp; movl reg,(tmp)
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#define Gstack 4
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#else /* ROSE shared libraries */
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#define Gpush
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#define Gpop
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#define Gload
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#define Gcall(func) call *9f; .data; .align ALIGN; 9: .long func; .text
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#define Gotoff(lab) lab
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#define Gotoff2(l,r) l(r)
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#define Gotoff3(l,r,s) l(,r,s)
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#define Gaddr(to,lab) movl 9f,to; .data; .align ALIGN; 9: .long lab; .text
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#define Gcmp(lab,reg) cmpl reg,9f; .data; .align ALIGN; 9: .long lab; .text
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#define Gmemload(lab,reg) movl 9f,reg; movl (reg),reg; .data; .align ALIGN; 9: .long lab; .text
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#define Gmemstore(reg,lab,tmp) movl 9f,tmp; movl reg,(tmp); .data; .align ALIGN; 9: .long lab; .text
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#define Gstack 0
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#endif /* __ELF__ */
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#endif /* __SHARED__ */
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/* Egotoff is not provided, since external symbols should not use @GOTOFF
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relocations. */
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#define Egcall(func) Gcall(EXT(func))
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#define Egaddr(to,lab) Gaddr(to,EXT(lab))
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#define Egcmp(lab,reg) Gcmp(EXT(lab),reg)
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#define Egmemload(lab,reg) Gmemload(EXT(lab),reg)
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#define Egmemstore(reg,lab,tmp) Gmemstore(reg,EXT(lab),tmp)
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#define Lgotoff(lab) Gotoff(LCL(lab))
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#define Lgotoff2(l,r) Gotoff2(LCL(l),r)
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#define Lgotoff3(l,r,s) Gotoff3(LCL(l),r,s)
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#define Lgcmp(lab,reg) Gcmp(LCL(lab),reg)
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#define Lgmemload(lab,reg) movl Lgotoff(lab),reg
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#define Lgmemstore(reg,lab,tmp) movl reg,Lgotoff(lab)
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#ifdef ASSEMBLER
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#if MACH_KDB
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#include <ddb/stab.h>
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/*
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* This pseudo-assembler line is added so that there will be at least
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* one N_SO entry in the symbol stable to define the current file name.
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*/
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#endif /* MACH_KDB */
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#else /* NOT ASSEMBLER */
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/* These defines are here for .c files that wish to reference global symbols
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* within __asm__ statements.
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*/
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#ifndef __NO_UNDERSCORES__
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#define CC_SYM_PREFIX "_"
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#else
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#define CC_SYM_PREFIX ""
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#endif /* __NO_UNDERSCORES__ */
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#endif /* ASSEMBLER */
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/*
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* The following macros make calls into C code.
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* They dynamically align the stack to 16 bytes.
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*/
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#if defined(__i386__)
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/*
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* Arguments are moved (not pushed) onto the correctly aligned stack.
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* NOTE: ESI is destroyed in the process, and hence cannot
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* be directly used as a parameter. Users of this macro must
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* independently preserve ESI (a non-volatile) if the routine is
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* intended to be called from C, for instance.
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*/
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#define CCALL(fn) \
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movl %esp, %esi ;\
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andl $0xFFFFFFF0, %esp ;\
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call EXT(fn) ;\
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movl %esi, %esp
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#define CCALL1(fn, arg1) \
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movl %esp, %esi ;\
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subl $4, %esp ;\
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andl $0xFFFFFFF0, %esp ;\
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movl arg1, (%esp) ;\
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call EXT(fn) ;\
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movl %esi, %esp
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#define CCALL2(fn, arg1, arg2) \
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movl %esp, %esi ;\
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subl $8, %esp ;\
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andl $0xFFFFFFF0, %esp ;\
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movl arg2, 4(%esp) ;\
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movl arg1, (%esp) ;\
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call EXT(fn) ;\
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movl %esi, %esp
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/* This variant exists to permit adjustment of the stack by "dtrace" */
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#define CCALL1WITHSP(fn, arg1) \
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movl %esp, %esi ;\
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subl $12, %esp ;\
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andl $0xFFFFFFF0, %esp ;\
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movl %esi, 8(%esp) ;\
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leal 8(%esp), %esi ;\
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movl %esi, 4(%esp) ;\
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movl arg1, (%esp) ;\
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call EXT(fn) ;\
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movl 8(%esp), %esp
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/*
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* CCALL5 is used for callee functions with 3 arguments but
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* where arg2 (a3:a2) and arg3 (a5:a4) are 64-bit values.
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*/
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#define CCALL5(fn, a1, a2, a3, a4, a5) \
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movl %esp, %esi ;\
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subl $20, %esp ;\
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andl $0xFFFFFFF0, %esp ;\
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movl a5, 16(%esp) ;\
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movl a4, 12(%esp) ;\
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movl a3, 8(%esp) ;\
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movl a2, 4(%esp) ;\
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movl a1, (%esp) ;\
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call EXT(fn) ;\
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movl %esi, %esp
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#elif defined(__x86_64__)
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/* This variant exists to permit adjustment of the stack by "dtrace" */
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#define CCALLWITHSP(fn) \
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mov %rsp, %r12 ;\
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sub $8, %rsp ;\
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and $0xFFFFFFFFFFFFFFF0, %rsp ;\
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mov %r12, (%rsp) ;\
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leaq (%rsp), %rsi ;\
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call EXT(fn) ;\
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mov (%rsp), %rsp
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#define CCALL(fn) \
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mov %rsp, %r12 ;\
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and $0xFFFFFFFFFFFFFFF0, %rsp ;\
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call EXT(fn) ;\
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mov %r12, %rsp
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#define CCALL1(fn, arg1) \
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mov arg1, %rdi ;\
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CCALL(fn)
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#define CCALL2(fn, arg1, arg2) \
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mov arg1, %rdi ;\
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CCALL(fn)
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#define CCALL3(fn, arg1, arg2, arg3) \
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mov arg1, %rdi ;\
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mov arg2, %rsi ;\
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mov arg3, %rdx ;\
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CCALL(fn)
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#else
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#error unsupported architecture
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#endif
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#endif /* _I386_ASM_H_ */
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