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c906108c | 1 | /* Macro definitions for i386, Unix System V. |
b6ba6518 KB |
2 | Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1998, 1999, |
3 | 2000 Free Software Foundation, Inc. | |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
c906108c | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
c906108c | 16 | |
c5aa993b JM |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
21 | |
22 | #ifndef TM_I386V_H | |
23 | #define TM_I386V_H 1 | |
24 | ||
25 | /* First pick up the generic *86 target file. */ | |
26 | ||
f88e2c52 | 27 | #include "regcache.h" |
c906108c SS |
28 | #include "i386/tm-i386.h" |
29 | ||
30 | /* Number of traps that happen between exec'ing the shell to run an | |
31 | inferior, and when we finally get to the inferior code. This is | |
32 | 2 on most implementations. Override here to 4. */ | |
33 | ||
34 | #undef START_INFERIOR_TRAPS_EXPECTED | |
35 | #define START_INFERIOR_TRAPS_EXPECTED 4 | |
36 | ||
c906108c SS |
37 | /* Extract from an array REGBUF containing the (raw) register state |
38 | a function return value of type TYPE, and copy that, in virtual format, | |
39 | into VALBUF. */ | |
40 | ||
41 | #undef EXTRACT_RETURN_VALUE | |
42 | #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ | |
43 | memcpy ((VALBUF), (REGBUF), TYPE_LENGTH (TYPE)) | |
44 | ||
45 | /* Write into appropriate registers a function return value | |
46 | of type TYPE, given in virtual format. */ | |
47 | ||
48 | #undef STORE_RETURN_VALUE | |
49 | #define STORE_RETURN_VALUE(TYPE,VALBUF) \ | |
50 | write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE)) | |
c906108c | 51 | \f |
c5aa993b | 52 | |
c906108c SS |
53 | /* Describe the pointer in each stack frame to the previous stack frame |
54 | (its caller). */ | |
55 | ||
56 | /* FRAME_CHAIN takes a frame's nominal address | |
57 | and produces the frame's chain-pointer. */ | |
58 | ||
59 | #undef FRAME_CHAIN | |
60 | #define FRAME_CHAIN(thisframe) \ | |
61 | (!inside_entry_file ((thisframe)->pc) ? \ | |
62 | read_memory_integer ((thisframe)->frame, 4) :\ | |
63 | 0) | |
64 | ||
65 | /* Define other aspects of the stack frame. */ | |
66 | ||
67 | /* A macro that tells us whether the function invocation represented | |
68 | by FI does not have a frame on the stack associated with it. If it | |
69 | does not, FRAMELESS is set to 1, else 0. */ | |
70 | ||
71 | #undef FRAMELESS_FUNCTION_INVOCATION | |
392a587b JM |
72 | #define FRAMELESS_FUNCTION_INVOCATION(FI) \ |
73 | (frameless_look_for_prologue (FI)) | |
c906108c SS |
74 | |
75 | #undef FRAME_SAVED_PC | |
76 | #define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4)) | |
77 | ||
78 | /* Return number of args passed to a frame. | |
79 | Can return -1, meaning no way to tell. */ | |
80 | ||
81 | #undef FRAME_NUM_ARGS | |
392a587b | 82 | #define FRAME_NUM_ARGS(fi) (-1) |
c906108c | 83 | |
104c1213 | 84 | /* Forward decl's for prototypes */ |
c906108c SS |
85 | struct frame_info; |
86 | struct frame_saved_regs; | |
c906108c | 87 | |
a14ed312 | 88 | extern int i386_frame_num_args (struct frame_info *); |
c906108c | 89 | |
c5aa993b | 90 | #endif /* ifndef TM_I386V_H */ |