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ac99cb0c | 1 | /* Copyright (C) 2001 Free Software Foundation, Inc. |
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2 | * * |
3 | * This library is free software; you can redistribute it and/or | |
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4 | * modify it under the terms of the GNU Lesser General Public License |
5 | * as published by the Free Software Foundation; either version 3 of | |
6 | * the License, or (at your option) any later version. | |
ac99cb0c | 7 | * |
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8 | * This library is distributed in the hope that it will be useful, but |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
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10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
11 | * Lesser General Public License for more details. | |
ac99cb0c | 12 | * |
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13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
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15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
16 | * 02110-1301 USA | |
560b9c25 | 17 | */ |
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18 | |
19 | #ifndef _SCM_FRAMES_H_ | |
20 | #define _SCM_FRAMES_H_ | |
21 | ||
22 | #include <libguile.h> | |
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23 | #include "programs.h" |
24 | ||
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25 | \f |
26 | /* | |
af988bbf | 27 | * VM frames |
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28 | */ |
29 | ||
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30 | /* VM Frame Layout |
31 | --------------- | |
32 | ||
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33 | | | <- fp + bp->nargs + bp->nlocs + 4 |
34 | +------------------+ = SCM_FRAME_UPPER_ADDRESS (fp) | |
ac99cb0c | 35 | | Return address | |
da320011 | 36 | | MV return address| |
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37 | | Dynamic link | |
38 | | External link | <- fp + bp->nargs + bp->nlocs | |
b6368dbb | 39 | | Local variable 1 | = SCM_FRAME_DATA_ADDRESS (fp) |
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40 | | Local variable 0 | <- fp + bp->nargs |
41 | | Argument 1 | | |
42 | | Argument 0 | <- fp | |
43 | | Program | <- fp - 1 | |
af988bbf | 44 | +------------------+ = SCM_FRAME_LOWER_ADDRESS (fp) |
ac99cb0c | 45 | | | |
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46 | |
47 | As can be inferred from this drawing, it is assumed that | |
48 | `sizeof (SCM *) == sizeof (SCM)', since pointers (the `link' parts) are | |
49 | assumed to be as long as SCM objects. */ | |
ac99cb0c | 50 | |
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51 | #define SCM_FRAME_DATA_ADDRESS(fp) \ |
52 | (fp + SCM_PROGRAM_DATA (SCM_FRAME_PROGRAM (fp))->nargs \ | |
53 | + SCM_PROGRAM_DATA (SCM_FRAME_PROGRAM (fp))->nlocs) | |
b1b942b7 | 54 | #define SCM_FRAME_UPPER_ADDRESS(fp) (SCM_FRAME_DATA_ADDRESS (fp) + 4) |
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55 | #define SCM_FRAME_LOWER_ADDRESS(fp) (fp - 1) |
56 | ||
57 | #define SCM_FRAME_BYTE_CAST(x) ((scm_byte_t *) SCM_UNPACK (x)) | |
58 | #define SCM_FRAME_STACK_CAST(x) ((SCM *) SCM_UNPACK (x)) | |
ac99cb0c | 59 | |
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60 | #define SCM_FRAME_RETURN_ADDRESS(fp) \ |
61 | (SCM_FRAME_BYTE_CAST (SCM_FRAME_DATA_ADDRESS (fp)[3])) | |
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62 | #define SCM_FRAME_MV_RETURN_ADDRESS(fp) \ |
63 | (SCM_FRAME_BYTE_CAST (SCM_FRAME_DATA_ADDRESS (fp)[2])) | |
b6368dbb | 64 | #define SCM_FRAME_DYNAMIC_LINK(fp) \ |
b1b942b7 | 65 | (SCM_FRAME_STACK_CAST (SCM_FRAME_DATA_ADDRESS (fp)[1])) |
b6368dbb | 66 | #define SCM_FRAME_SET_DYNAMIC_LINK(fp, dl) \ |
b1b942b7 | 67 | ((SCM_FRAME_DATA_ADDRESS (fp)[1])) = (SCM)(dl); |
b6368dbb | 68 | #define SCM_FRAME_EXTERNAL_LINK(fp) (SCM_FRAME_DATA_ADDRESS (fp)[0]) |
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69 | #define SCM_FRAME_VARIABLE(fp,i) fp[i] |
70 | #define SCM_FRAME_PROGRAM(fp) fp[-1] | |
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71 | |
72 | \f | |
73 | /* | |
af988bbf | 74 | * Heap frames |
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75 | */ |
76 | ||
560b9c25 | 77 | SCM_API scm_t_bits scm_tc16_vm_frame; |
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78 | |
79 | struct scm_vm_frame | |
80 | { | |
81 | SCM stack_holder; | |
82 | SCM *fp; | |
83 | SCM *sp; | |
84 | scm_byte_t *ip; | |
85 | scm_t_ptrdiff offset; | |
86 | }; | |
87 | ||
88 | #define SCM_VM_FRAME_P(x) SCM_SMOB_PREDICATE (scm_tc16_vm_frame, x) | |
89 | #define SCM_VM_FRAME_DATA(x) ((struct scm_vm_frame*)SCM_SMOB_DATA (x)) | |
90 | #define SCM_VM_FRAME_STACK_HOLDER(f) SCM_VM_FRAME_DATA(f)->stack_holder | |
91 | #define SCM_VM_FRAME_FP(f) SCM_VM_FRAME_DATA(f)->fp | |
92 | #define SCM_VM_FRAME_SP(f) SCM_VM_FRAME_DATA(f)->sp | |
93 | #define SCM_VM_FRAME_IP(f) SCM_VM_FRAME_DATA(f)->ip | |
94 | #define SCM_VM_FRAME_OFFSET(f) SCM_VM_FRAME_DATA(f)->offset | |
95 | #define SCM_VALIDATE_VM_FRAME(p,x) SCM_MAKE_VALIDATE (p, x, VM_FRAME_P) | |
96 | ||
97 | /* FIXME rename scm_byte_t */ | |
560b9c25 | 98 | SCM_API SCM scm_c_make_vm_frame (SCM stack_holder, SCM *fp, SCM *sp, |
b1b942b7 | 99 | scm_byte_t *ip, scm_t_ptrdiff offset); |
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100 | SCM_API SCM scm_vm_frame_p (SCM obj); |
101 | SCM_API SCM scm_vm_frame_program (SCM frame); | |
102 | SCM_API SCM scm_vm_frame_arguments (SCM frame); | |
103 | SCM_API SCM scm_vm_frame_source (SCM frame); | |
104 | SCM_API SCM scm_vm_frame_local_ref (SCM frame, SCM index); | |
105 | SCM_API SCM scm_vm_frame_local_set_x (SCM frame, SCM index, SCM val); | |
106 | SCM_API SCM scm_vm_frame_return_address (SCM frame); | |
107 | SCM_API SCM scm_vm_frame_mv_return_address (SCM frame); | |
108 | SCM_API SCM scm_vm_frame_dynamic_link (SCM frame); | |
109 | SCM_API SCM scm_vm_frame_external_link (SCM frame); | |
110 | SCM_API SCM scm_vm_frame_stack (SCM frame); | |
111 | ||
112 | SCM_API SCM scm_c_vm_frame_prev (SCM frame); | |
113 | ||
114 | SCM_INTERNAL void scm_bootstrap_frames (void); | |
115 | SCM_INTERNAL void scm_init_frames (void); | |
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116 | |
117 | #endif /* _SCM_FRAMES_H_ */ | |
118 | ||
119 | /* | |
120 | Local Variables: | |
121 | c-file-style: "gnu" | |
122 | End: | |
123 | */ |