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1.1 root 1: /*
2: * Ported to Boot 386BSD by Julian Elsicher ([email protected]) Sept. 1992
3: *
4: * Mach Operating System
5: * Copyright (c) 1991,1990,1989 Carnegie Mellon University
6: * All Rights Reserved.
7: *
8: * Permission to use, copy, modify and distribute this software and its
9: * documentation is hereby granted, provided that both the copyright
10: * notice and this permission notice appear in all copies of the
11: * software, derivative works or modified versions, and any portions
12: * thereof, and that both notices appear in supporting documentation.
13: *
14: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
15: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
16: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
17: *
18: * Carnegie Mellon requests users of this software to return to
19: *
20: * Software Distribution Coordinator or [email protected]
21: * School of Computer Science
22: * Carnegie Mellon University
23: * Pittsburgh PA 15213-3890
24: *
25: * any improvements or extensions that they make and grant Carnegie Mellon
26: * the rights to redistribute these changes.
27: */
28: /*
29: * HISTORY
1.1.1.2 ! root 30: * asm.h,v
! 31: * Revision 1.2 1993/07/11 12:02:19 andrew
! 32: * Fixes from bde, including support for loading @ any MB boundary (e.g. a
! 33: * kernel linked for 0xfe100000 will load at the 1MB mark) and read-ahead
! 34: * buffering to speed booting from floppies. Also works with aha174x
! 35: * controllers in enhanced mode.
! 36: *
! 37: *
! 38: * 93/06/28 bde
! 39: * Deleted addr16 and data16. These produce the same prefix bytes as
! 40: * addr32 and data32 but have confusing names. There is no way to make
! 41: * gas produce 16-bit addresses or operand sizes. Instead, we let it
! 42: * produce 32-bit addresses and operand sizes and explicitly code the
! 43: * correct prefix(es) to make the address modes and operand sizes what
! 44: * gas thinks they are. It would be safer to use prefixes before
! 45: * _every_ instruction (there are alleady a lot of unnecessary data32's
! 46: * before short jumps in case the jumps are actually long). We must
! 47: * avoid "word" instructions becuase gas would produce the wrong prefix
! 48: * and there is no way to cancel a prefix. We sometimes avoid adding
! 49: * a prefix using kludges like
! 50: * "xorl %eax, %eax # actually xorw %ax, %ax".
! 51: *
! 52: * 93/06/28 bde
! 53: * Added addr32.
! 54: *
! 55: * Revision 1.1 1993/03/21 18:08:18 cgd
1.1 root 56: * after 0.2.2 "stable" patches applied
57: *
58: * Revision 2.7 92/02/29 15:33:41 rpd
59: * Added ENTRY2.
60: * [92/02/28 rpd]
61: *
62: * Revision 2.6 92/02/19 15:07:52 elf
63: * Changed #if __STDC__ to #ifdef __STDC__
64: * [92/01/16 jvh]
65: *
66: * Revision 2.5 91/05/14 16:02:45 mrt
67: * Correcting copyright
68: *
69: * Revision 2.4 91/02/05 17:10:42 mrt
70: * Changed to new Mach copyright
71: * [91/02/01 17:30:29 mrt]
72: *
73: * Revision 2.3 90/12/20 16:35:27 jeffreyh
74: * changes for __STDC__
75: * [90/12/06 jeffreyh]
76: *
77: * Revision 2.2 90/05/03 15:24:12 dbg
78: * First checkin.
79: *
80: *
81: * Typo on ENTRY if gprof
82: * [90/03/29 rvb]
83: *
84: * fix SVC for "ifdef wheeze" [kupfer]
85: * Fix the GPROF definitions.
86: * ENTRY(x) gets profiled iffdef GPROF.
87: * Entry(x) (and DATA(x)) is NEVER profiled.
88: * MCOUNT can be used by asm that intends to build a frame,
89: * after the frame is built.
90: * [90/02/26 rvb]
91: *
92: * Add #define addr16 .byte 0x67
93: * [90/02/09 rvb]
94: * Added LBi, SVC and ENTRY
95: * [89/11/10 09:51:33 rvb]
96: *
97: * New a.out and coff compatible .s files.
98: * [89/10/16 rvb]
99: */
100:
101:
102: #define S_ARG0 4(%esp)
103: #define S_ARG1 8(%esp)
104: #define S_ARG2 12(%esp)
105: #define S_ARG3 16(%esp)
106:
107: #define FRAME pushl %ebp; movl %esp, %ebp
108: #define EMARF leave
109:
110: #define B_ARG0 8(%ebp)
111: #define B_ARG1 12(%ebp)
112: #define B_ARG2 16(%ebp)
113: #define B_ARG3 20(%ebp)
114:
115: #ifdef wheeze
116:
117: #define ALIGN 4
118: #define EXT(x) x
119: #define LEXT(x) x:
120: #define LCL(x) ./**/x
121:
122: #define LB(x,n) ./**/x
123: #define LBb(x,n) ./**/x
124: #define LBf(x,n) ./**/x
125:
126: #define SVC lcall $7,$0
127:
128: #define String .string
129: #define Value .value
130: #define Times(a,b) [a\*b]
131: #define Divide(a,b) [a\\b]
132:
133: #define INB inb (%dx)
134: #define OUTB outb (%dx)
135: #define INL inl (%dx)
136: #define OUTL outl (%dx)
137:
138: #else wheeze
139: #define ALIGN
140: #define LCL(x) x
141:
142: #define LB(x,n) n
143: #ifdef __STDC__
144: #define EXT(x) _ ## x
145: #define LEXT(x) _ ## x ## :
146:
147: #define LBb(x,n) n ## b
148: #define LBf(x,n) n ## f
149: #else __STDC__
150: #define EXT(x) _/**/x
151: #define LEXT(x) _/**/x/**/:
152: #define LBb(x,n) n/**/b
153: #define LBf(x,n) n/**/f
154: #endif __STDC__
155: #define SVC .byte 0x9a; .long 0; .word 0x7
156:
157: #define String .ascii
158: #define Value .word
159: #define Times(a,b) (a*b)
160: #define Divide(a,b) (a/b)
161:
162: #define INB inb %dx, %al
163: #define OUTB outb %al, %dx
164: #define INL inl %dx, %eax
165: #define OUTL outl %eax, %dx
166:
167: #endif wheeze
168:
1.1.1.2 ! root 169: #define addr32 .byte 0x67
1.1 root 170: #define data32 .byte 0x66
171:
172: #ifdef GPROF
173: #ifdef __STDC__
174:
175: #define MCOUNT .data; LB(x, 9); .long 0; .text; lea LBb(x, 9),%edx; call mcount
176: #define ENTRY(x) .globl EXT(x); .align ALIGN; LEXT(x) ; \
177: pushl %ebp; movl %esp, %ebp; MCOUNT; popl %ebp;
178: #define ENTRY2(x,y) .globl EXT(x); .globl EXT(y); \
179: .align ALIGN; LEXT(x) LEXT(y) ; \
180: pushl %ebp; movl %esp, %ebp; MCOUNT; popl %ebp;
181: #define ASENTRY(x) .globl x; .align ALIGN; x ## : ; \
182: pushl %ebp; movl %esp, %ebp; MCOUNT; popl %ebp;
183:
184: #else __STDC__
185:
186: #define MCOUNT .data; LB(x, 9): .long 0; .text; lea LBb(x, 9),%edx; call mcount
187: #define ENTRY(x) .globl EXT(x); .align ALIGN; LEXT(x) ; \
188: pushl %ebp; movl %esp, %ebp; MCOUNT; popl %ebp;
189: #define ENTRY2(x,y) .globl EXT(x); .globl EXT(y); \
190: .align ALIGN; LEXT(x) LEXT(y)
191: #define ASENTRY(x) .globl x; .align ALIGN; x: ; \
192: pushl %ebp; movl %esp, %ebp; MCOUNT; popl %ebp;
193:
194: #endif __STDC__
195: #else GPROF
196: #ifdef __STDC__
197:
198: #define MCOUNT
199: #define ENTRY(x) .globl EXT(x); .align ALIGN; LEXT(x)
200: #define ENTRY2(x,y) .globl EXT(x); .globl EXT(y); \
201: .align ALIGN; LEXT(x) LEXT(y)
202: #define ASENTRY(x) .globl x; .align ALIGN; x ## :
203:
204: #else __STDC__
205:
206: #define MCOUNT
207: #define ENTRY(x) .globl EXT(x); .align ALIGN; LEXT(x)
208: #define ENTRY2(x,y) .globl EXT(x); .globl EXT(y); \
209: .align ALIGN; LEXT(x) LEXT(y)
210: #define ASENTRY(x) .globl x; .align ALIGN; x:
211:
212: #endif __STDC__
213: #endif GPROF
214:
215: #define Entry(x) .globl EXT(x); .align ALIGN; LEXT(x)
216: #define DATA(x) .globl EXT(x); .align ALIGN; LEXT(x)
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