217 lines
6.1 KiB
C
217 lines
6.1 KiB
C
/*
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* Ported to Boot 386BSD by Julian Elsicher (julian@tfs.com) Sept. 1992
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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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/*
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* HISTORY
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* $Log: asm.h,v $
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* Revision 1.2 1993/07/11 12:02:19 andrew
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* Fixes from bde, including support for loading @ any MB boundary (e.g. a
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* kernel linked for 0xfe100000 will load at the 1MB mark) and read-ahead
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* buffering to speed booting from floppies. Also works with aha174x
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* controllers in enhanced mode.
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*
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*
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* 93/06/28 bde
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* Deleted addr16 and data16. These produce the same prefix bytes as
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* addr32 and data32 but have confusing names. There is no way to make
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* gas produce 16-bit addresses or operand sizes. Instead, we let it
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* produce 32-bit addresses and operand sizes and explicitly code the
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* correct prefix(es) to make the address modes and operand sizes what
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* gas thinks they are. It would be safer to use prefixes before
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* _every_ instruction (there are alleady a lot of unnecessary data32's
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* before short jumps in case the jumps are actually long). We must
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* avoid "word" instructions becuase gas would produce the wrong prefix
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* and there is no way to cancel a prefix. We sometimes avoid adding
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* a prefix using kludges like
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* "xorl %eax, %eax # actually xorw %ax, %ax".
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*
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* 93/06/28 bde
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* Added addr32.
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*
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* Revision 1.1 1993/03/21 18:08:18 cgd
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* after 0.2.2 "stable" patches applied
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*
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* Revision 2.7 92/02/29 15:33:41 rpd
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* Added ENTRY2.
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* [92/02/28 rpd]
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*
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* Revision 2.6 92/02/19 15:07:52 elf
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* Changed #if __STDC__ to #ifdef __STDC__
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* [92/01/16 jvh]
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*
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* Revision 2.5 91/05/14 16:02:45 mrt
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* Correcting copyright
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*
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* Revision 2.4 91/02/05 17:10:42 mrt
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* Changed to new Mach copyright
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* [91/02/01 17:30:29 mrt]
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*
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* Revision 2.3 90/12/20 16:35:27 jeffreyh
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* changes for __STDC__
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* [90/12/06 jeffreyh]
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*
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* Revision 2.2 90/05/03 15:24:12 dbg
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* First checkin.
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*
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*
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* Typo on ENTRY if gprof
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* [90/03/29 rvb]
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*
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* fix SVC for "ifdef wheeze" [kupfer]
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* Fix the GPROF definitions.
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* ENTRY(x) gets profiled iffdef GPROF.
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* Entry(x) (and DATA(x)) is NEVER profiled.
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* MCOUNT can be used by asm that intends to build a frame,
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* after the frame is built.
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* [90/02/26 rvb]
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*
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* Add #define addr16 .byte 0x67
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* [90/02/09 rvb]
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* Added LBi, SVC and ENTRY
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* [89/11/10 09:51:33 rvb]
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*
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* New a.out and coff compatible .s files.
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* [89/10/16 rvb]
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*/
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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 FRAME pushl %ebp; movl %esp, %ebp
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#define EMARF leave
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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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#ifdef wheeze
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#define ALIGN 4
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#define EXT(x) x
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#define LEXT(x) x:
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#define LCL(x) ./**/x
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#define LB(x,n) ./**/x
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#define LBb(x,n) ./**/x
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#define LBf(x,n) ./**/x
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#define SVC lcall $7,$0
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#define String .string
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#define Value .value
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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)
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#define OUTB outb (%dx)
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#define INL inl (%dx)
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#define OUTL outl (%dx)
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#else wheeze
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#define ALIGN
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#define LCL(x) x
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#define LB(x,n) n
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#ifdef __STDC__
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#define EXT(x) _ ## x
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#define LEXT(x) _ ## x ## :
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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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#define EXT(x) _/**/x
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#define LEXT(x) _/**/x/**/:
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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 String .ascii
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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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#endif wheeze
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#define addr32 .byte 0x67
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#define data32 .byte 0x66
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#ifdef GPROF
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#ifdef __STDC__
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#define MCOUNT .data; LB(x, 9); .long 0; .text; lea LBb(x, 9),%edx; call mcount
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#define ENTRY(x) .globl EXT(x); .align ALIGN; LEXT(x) ; \
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pushl %ebp; movl %esp, %ebp; MCOUNT; popl %ebp;
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#define ENTRY2(x,y) .globl EXT(x); .globl EXT(y); \
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.align ALIGN; LEXT(x) LEXT(y) ; \
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pushl %ebp; movl %esp, %ebp; MCOUNT; popl %ebp;
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#define ASENTRY(x) .globl x; .align ALIGN; x ## : ; \
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pushl %ebp; movl %esp, %ebp; MCOUNT; popl %ebp;
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#else __STDC__
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#define MCOUNT .data; LB(x, 9): .long 0; .text; lea LBb(x, 9),%edx; call mcount
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#define ENTRY(x) .globl EXT(x); .align ALIGN; LEXT(x) ; \
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pushl %ebp; movl %esp, %ebp; MCOUNT; popl %ebp;
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#define ENTRY2(x,y) .globl EXT(x); .globl EXT(y); \
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.align ALIGN; LEXT(x) LEXT(y)
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#define ASENTRY(x) .globl x; .align ALIGN; x: ; \
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pushl %ebp; movl %esp, %ebp; MCOUNT; popl %ebp;
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#endif __STDC__
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#else GPROF
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#ifdef __STDC__
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#define MCOUNT
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#define ENTRY(x) .globl EXT(x); .align ALIGN; LEXT(x)
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#define ENTRY2(x,y) .globl EXT(x); .globl EXT(y); \
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.align ALIGN; LEXT(x) LEXT(y)
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#define ASENTRY(x) .globl x; .align ALIGN; x ## :
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#else __STDC__
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#define MCOUNT
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#define ENTRY(x) .globl EXT(x); .align ALIGN; LEXT(x)
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#define ENTRY2(x,y) .globl EXT(x); .globl EXT(y); \
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.align ALIGN; LEXT(x) LEXT(y)
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#define ASENTRY(x) .globl x; .align ALIGN; x:
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#endif __STDC__
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#endif GPROF
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#define Entry(x) .globl EXT(x); .align ALIGN; LEXT(x)
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#define DATA(x) .globl EXT(x); .align ALIGN; LEXT(x)
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