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1 | /* Copyright (C) 2001 Free Software Foundation, Inc. |
2 | * | |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, | |
16 | * Boston, MA 02111-1307 USA | |
17 | * | |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
40 | * If you do not wish that, delete this exception notice. */ | |
41 | ||
42 | #ifndef _SCM_FRAMES_H_ | |
43 | #define _SCM_FRAMES_H_ | |
44 | ||
45 | #include <libguile.h> | |
ac99cb0c KN |
46 | #include "programs.h" |
47 | ||
ac99cb0c KN |
48 | \f |
49 | /* | |
af988bbf | 50 | * VM frames |
ac99cb0c KN |
51 | */ |
52 | ||
b6368dbb LC |
53 | /* VM Frame Layout |
54 | --------------- | |
55 | ||
af988bbf KN |
56 | | | <- fp + bp->nargs + bp->nlocs + 4 |
57 | +------------------+ = SCM_FRAME_UPPER_ADDRESS (fp) | |
ac99cb0c | 58 | | Return address | |
da320011 | 59 | | MV return address| |
ac99cb0c KN |
60 | | Dynamic link | |
61 | | External link | <- fp + bp->nargs + bp->nlocs | |
b6368dbb | 62 | | Local variable 1 | = SCM_FRAME_DATA_ADDRESS (fp) |
ac99cb0c KN |
63 | | Local variable 0 | <- fp + bp->nargs |
64 | | Argument 1 | | |
65 | | Argument 0 | <- fp | |
66 | | Program | <- fp - 1 | |
af988bbf | 67 | +------------------+ = SCM_FRAME_LOWER_ADDRESS (fp) |
ac99cb0c | 68 | | | |
b6368dbb LC |
69 | |
70 | As can be inferred from this drawing, it is assumed that | |
71 | `sizeof (SCM *) == sizeof (SCM)', since pointers (the `link' parts) are | |
72 | assumed to be as long as SCM objects. */ | |
ac99cb0c | 73 | |
af988bbf KN |
74 | #define SCM_FRAME_DATA_ADDRESS(fp) \ |
75 | (fp + SCM_PROGRAM_DATA (SCM_FRAME_PROGRAM (fp))->nargs \ | |
76 | + SCM_PROGRAM_DATA (SCM_FRAME_PROGRAM (fp))->nlocs) | |
b1b942b7 | 77 | #define SCM_FRAME_UPPER_ADDRESS(fp) (SCM_FRAME_DATA_ADDRESS (fp) + 4) |
af988bbf KN |
78 | #define SCM_FRAME_LOWER_ADDRESS(fp) (fp - 1) |
79 | ||
80 | #define SCM_FRAME_BYTE_CAST(x) ((scm_byte_t *) SCM_UNPACK (x)) | |
81 | #define SCM_FRAME_STACK_CAST(x) ((SCM *) SCM_UNPACK (x)) | |
ac99cb0c | 82 | |
b6368dbb LC |
83 | #define SCM_FRAME_RETURN_ADDRESS(fp) \ |
84 | (SCM_FRAME_BYTE_CAST (SCM_FRAME_DATA_ADDRESS (fp)[3])) | |
b1b942b7 AW |
85 | #define SCM_FRAME_MV_RETURN_ADDRESS(fp) \ |
86 | (SCM_FRAME_BYTE_CAST (SCM_FRAME_DATA_ADDRESS (fp)[2])) | |
b6368dbb | 87 | #define SCM_FRAME_DYNAMIC_LINK(fp) \ |
b1b942b7 | 88 | (SCM_FRAME_STACK_CAST (SCM_FRAME_DATA_ADDRESS (fp)[1])) |
b6368dbb | 89 | #define SCM_FRAME_SET_DYNAMIC_LINK(fp, dl) \ |
b1b942b7 | 90 | ((SCM_FRAME_DATA_ADDRESS (fp)[1])) = (SCM)(dl); |
b6368dbb | 91 | #define SCM_FRAME_EXTERNAL_LINK(fp) (SCM_FRAME_DATA_ADDRESS (fp)[0]) |
af988bbf KN |
92 | #define SCM_FRAME_VARIABLE(fp,i) fp[i] |
93 | #define SCM_FRAME_PROGRAM(fp) fp[-1] | |
ac99cb0c KN |
94 | |
95 | \f | |
96 | /* | |
af988bbf | 97 | * Heap frames |
ac99cb0c KN |
98 | */ |
99 | ||
b1b942b7 AW |
100 | extern scm_t_bits scm_tc16_vm_frame; |
101 | ||
102 | struct scm_vm_frame | |
103 | { | |
104 | SCM stack_holder; | |
105 | SCM *fp; | |
106 | SCM *sp; | |
107 | scm_byte_t *ip; | |
108 | scm_t_ptrdiff offset; | |
109 | }; | |
110 | ||
111 | #define SCM_VM_FRAME_P(x) SCM_SMOB_PREDICATE (scm_tc16_vm_frame, x) | |
112 | #define SCM_VM_FRAME_DATA(x) ((struct scm_vm_frame*)SCM_SMOB_DATA (x)) | |
113 | #define SCM_VM_FRAME_STACK_HOLDER(f) SCM_VM_FRAME_DATA(f)->stack_holder | |
114 | #define SCM_VM_FRAME_FP(f) SCM_VM_FRAME_DATA(f)->fp | |
115 | #define SCM_VM_FRAME_SP(f) SCM_VM_FRAME_DATA(f)->sp | |
116 | #define SCM_VM_FRAME_IP(f) SCM_VM_FRAME_DATA(f)->ip | |
117 | #define SCM_VM_FRAME_OFFSET(f) SCM_VM_FRAME_DATA(f)->offset | |
118 | #define SCM_VALIDATE_VM_FRAME(p,x) SCM_MAKE_VALIDATE (p, x, VM_FRAME_P) | |
119 | ||
120 | /* FIXME rename scm_byte_t */ | |
121 | extern SCM scm_c_make_vm_frame (SCM stack_holder, SCM *fp, SCM *sp, | |
122 | scm_byte_t *ip, scm_t_ptrdiff offset); | |
123 | extern SCM scm_vm_frame_p (SCM obj); | |
124 | extern SCM scm_vm_frame_program (SCM frame); | |
125 | extern SCM scm_vm_frame_arguments (SCM frame); | |
126 | extern SCM scm_vm_frame_source (SCM frame); | |
127 | extern SCM scm_vm_frame_local_ref (SCM frame, SCM index); | |
128 | extern SCM scm_vm_frame_local_set_x (SCM frame, SCM index, SCM val); | |
129 | extern SCM scm_vm_frame_return_address (SCM frame); | |
130 | extern SCM scm_vm_frame_mv_return_address (SCM frame); | |
131 | extern SCM scm_vm_frame_dynamic_link (SCM frame); | |
132 | extern SCM scm_vm_frame_external_link (SCM frame); | |
133 | extern SCM scm_vm_frame_stack (SCM frame); | |
134 | ||
135 | extern SCM scm_c_vm_frame_prev (SCM frame); | |
fcd4901b | 136 | |
07e56b27 | 137 | extern void scm_bootstrap_frames (void); |
ac99cb0c KN |
138 | extern void scm_init_frames (void); |
139 | ||
140 | #endif /* _SCM_FRAMES_H_ */ | |
141 | ||
142 | /* | |
143 | Local Variables: | |
144 | c-file-style: "gnu" | |
145 | End: | |
146 | */ |