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c906108c SS |
1 | /* Macro definitions for i386, Unix System V. |
2 | Copyright 1986, 1987, 1989, 1991, 1992, 1993 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
19 | ||
20 | #ifndef TM_I386V_H | |
21 | #define TM_I386V_H 1 | |
22 | ||
23 | /* First pick up the generic *86 target file. */ | |
24 | ||
25 | #include "i386/tm-i386.h" | |
26 | ||
27 | /* Number of traps that happen between exec'ing the shell to run an | |
28 | inferior, and when we finally get to the inferior code. This is | |
29 | 2 on most implementations. Override here to 4. */ | |
30 | ||
31 | #undef START_INFERIOR_TRAPS_EXPECTED | |
32 | #define START_INFERIOR_TRAPS_EXPECTED 4 | |
33 | ||
34 | /* Number of machine registers */ | |
35 | ||
36 | #undef NUM_REGS | |
37 | #define NUM_REGS 16 | |
38 | ||
39 | /* Initializer for an array of names of registers. | |
40 | There should be NUM_REGS strings in this initializer. */ | |
41 | ||
42 | /* the order of the first 8 registers must match the compiler's | |
43 | * numbering scheme (which is the same as the 386 scheme) | |
44 | * also, this table must match regmap in i386-pinsn.c. | |
45 | */ | |
46 | ||
47 | #undef REGISTER_NAMES | |
48 | #define REGISTER_NAMES { "eax", "ecx", "edx", "ebx", \ | |
49 | "esp", "ebp", "esi", "edi", \ | |
50 | "eip", "ps", "cs", "ss", \ | |
51 | "ds", "es", "fs", "gs", \ | |
52 | } | |
53 | ||
54 | /* Total amount of space needed to store our copies of the machine's | |
55 | register state, the array `registers'. */ | |
56 | ||
57 | #undef REGISTER_BYTES | |
58 | #define REGISTER_BYTES (NUM_REGS * 4) | |
59 | ||
60 | /* Index within `registers' of the first byte of the space for | |
61 | register N. */ | |
62 | ||
63 | #undef REGISTER_BYTE | |
64 | #define REGISTER_BYTE(N) ((N)*4) | |
65 | ||
66 | /* Number of bytes of storage in the actual machine representation | |
67 | for register N. */ | |
68 | ||
69 | #undef REGISTER_RAW_SIZE | |
70 | #define REGISTER_RAW_SIZE(N) (4) | |
71 | ||
72 | /* Number of bytes of storage in the program's representation | |
73 | for register N. */ | |
74 | ||
75 | #undef REGISTER_VIRTUAL_SIZE | |
76 | #define REGISTER_VIRTUAL_SIZE(N) (4) | |
77 | ||
78 | /* Largest value REGISTER_RAW_SIZE can have. */ | |
79 | ||
80 | #undef MAX_REGISTER_RAW_SIZE | |
81 | #define MAX_REGISTER_RAW_SIZE 4 | |
82 | ||
83 | /* Largest value REGISTER_VIRTUAL_SIZE can have. */ | |
84 | ||
85 | #undef MAX_REGISTER_VIRTUAL_SIZE | |
86 | #define MAX_REGISTER_VIRTUAL_SIZE 4 | |
87 | ||
88 | /* Return the GDB type object for the "standard" data type | |
89 | of data in register N. */ | |
90 | /* Perhaps si and di should go here, but potentially they could be | |
91 | used for things other than address. */ | |
92 | ||
93 | #undef REGISTER_VIRTUAL_TYPE | |
94 | #define REGISTER_VIRTUAL_TYPE(N) \ | |
95 | ((N) == PC_REGNUM || (N) == FP_REGNUM || (N) == SP_REGNUM ? \ | |
96 | lookup_pointer_type (builtin_type_void) : builtin_type_int) | |
97 | ||
98 | /* Store the address of the place in which to copy the structure the | |
99 | subroutine will return. This is called from call_function. */ | |
100 | ||
101 | #undef STORE_STRUCT_RETURN | |
102 | #define STORE_STRUCT_RETURN(ADDR, SP) \ | |
103 | { char buf[REGISTER_SIZE]; \ | |
104 | (SP) -= sizeof (ADDR); \ | |
105 | store_address (buf, sizeof (ADDR), ADDR); \ | |
106 | write_memory ((SP), buf, sizeof (ADDR)); } | |
107 | ||
108 | /* Extract from an array REGBUF containing the (raw) register state | |
109 | a function return value of type TYPE, and copy that, in virtual format, | |
110 | into VALBUF. */ | |
111 | ||
112 | #undef EXTRACT_RETURN_VALUE | |
113 | #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ | |
114 | memcpy ((VALBUF), (REGBUF), TYPE_LENGTH (TYPE)) | |
115 | ||
116 | /* Write into appropriate registers a function return value | |
117 | of type TYPE, given in virtual format. */ | |
118 | ||
119 | #undef STORE_RETURN_VALUE | |
120 | #define STORE_RETURN_VALUE(TYPE,VALBUF) \ | |
121 | write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)) | |
122 | ||
123 | \f | |
124 | /* Describe the pointer in each stack frame to the previous stack frame | |
125 | (its caller). */ | |
126 | ||
127 | /* FRAME_CHAIN takes a frame's nominal address | |
128 | and produces the frame's chain-pointer. */ | |
129 | ||
130 | #undef FRAME_CHAIN | |
131 | #define FRAME_CHAIN(thisframe) \ | |
132 | (!inside_entry_file ((thisframe)->pc) ? \ | |
133 | read_memory_integer ((thisframe)->frame, 4) :\ | |
134 | 0) | |
135 | ||
136 | /* Define other aspects of the stack frame. */ | |
137 | ||
138 | /* A macro that tells us whether the function invocation represented | |
139 | by FI does not have a frame on the stack associated with it. If it | |
140 | does not, FRAMELESS is set to 1, else 0. */ | |
141 | ||
142 | #undef FRAMELESS_FUNCTION_INVOCATION | |
392a587b JM |
143 | #define FRAMELESS_FUNCTION_INVOCATION(FI) \ |
144 | (frameless_look_for_prologue (FI)) | |
c906108c SS |
145 | |
146 | #undef FRAME_SAVED_PC | |
147 | #define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4)) | |
148 | ||
149 | /* Return number of args passed to a frame. | |
150 | Can return -1, meaning no way to tell. */ | |
151 | ||
152 | #undef FRAME_NUM_ARGS | |
392a587b | 153 | #define FRAME_NUM_ARGS(fi) (-1) |
c906108c SS |
154 | |
155 | #ifdef __STDC__ /* Forward decl's for prototypes */ | |
156 | struct frame_info; | |
157 | struct frame_saved_regs; | |
158 | #endif | |
159 | ||
160 | extern int | |
161 | i386_frame_num_args PARAMS ((struct frame_info *)); | |
162 | ||
163 | #endif /* ifndef TM_I386V_H */ |