1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
/* Copyright (C) 2001, 2009 Free Software Foundation, Inc.
* *
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 3 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#ifndef _SCM_FRAMES_H_
#define _SCM_FRAMES_H_
#include <libguile.h>
#include "programs.h"
/*
* VM frames
*/
/* VM Frame Layout
---------------
| | <- fp + bp->nargs + bp->nlocs + 3
+------------------+ = SCM_FRAME_UPPER_ADDRESS (fp)
| Return address |
| MV return address|
| Dynamic link | <- fp + bp->nargs + bp->blocs
| Local variable 1 | = SCM_FRAME_DATA_ADDRESS (fp)
| Local variable 0 | <- fp + bp->nargs
| Argument 1 |
| Argument 0 | <- fp
| Program | <- fp - 1
+------------------+ = SCM_FRAME_LOWER_ADDRESS (fp)
| |
As can be inferred from this drawing, it is assumed that
`sizeof (SCM *) == sizeof (SCM)', since pointers (the `link' parts) are
assumed to be as long as SCM objects. */
#define SCM_FRAME_DATA_ADDRESS(fp) \
(fp + SCM_PROGRAM_DATA (SCM_FRAME_PROGRAM (fp))->nargs \
+ SCM_PROGRAM_DATA (SCM_FRAME_PROGRAM (fp))->nlocs)
#define SCM_FRAME_UPPER_ADDRESS(fp) (SCM_FRAME_DATA_ADDRESS (fp) + 3)
#define SCM_FRAME_LOWER_ADDRESS(fp) (fp - 1)
#define SCM_FRAME_BYTE_CAST(x) ((scm_byte_t *) SCM_UNPACK (x))
#define SCM_FRAME_STACK_CAST(x) ((SCM *) SCM_UNPACK (x))
#define SCM_FRAME_RETURN_ADDRESS(fp) \
(SCM_FRAME_BYTE_CAST (SCM_FRAME_DATA_ADDRESS (fp)[2]))
#define SCM_FRAME_MV_RETURN_ADDRESS(fp) \
(SCM_FRAME_BYTE_CAST (SCM_FRAME_DATA_ADDRESS (fp)[1]))
#define SCM_FRAME_DYNAMIC_LINK(fp) \
(SCM_FRAME_STACK_CAST (SCM_FRAME_DATA_ADDRESS (fp)[0]))
#define SCM_FRAME_SET_DYNAMIC_LINK(fp, dl) \
((SCM_FRAME_DATA_ADDRESS (fp)[0])) = (SCM)(dl);
#define SCM_FRAME_VARIABLE(fp,i) fp[i]
#define SCM_FRAME_PROGRAM(fp) fp[-1]
/*
* Heap frames
*/
SCM_API scm_t_bits scm_tc16_vm_frame;
struct scm_vm_frame
{
SCM stack_holder;
SCM *fp;
SCM *sp;
scm_byte_t *ip;
scm_t_ptrdiff offset;
};
#define SCM_VM_FRAME_P(x) SCM_SMOB_PREDICATE (scm_tc16_vm_frame, x)
#define SCM_VM_FRAME_DATA(x) ((struct scm_vm_frame*)SCM_SMOB_DATA (x))
#define SCM_VM_FRAME_STACK_HOLDER(f) SCM_VM_FRAME_DATA(f)->stack_holder
#define SCM_VM_FRAME_FP(f) SCM_VM_FRAME_DATA(f)->fp
#define SCM_VM_FRAME_SP(f) SCM_VM_FRAME_DATA(f)->sp
#define SCM_VM_FRAME_IP(f) SCM_VM_FRAME_DATA(f)->ip
#define SCM_VM_FRAME_OFFSET(f) SCM_VM_FRAME_DATA(f)->offset
#define SCM_VALIDATE_VM_FRAME(p,x) SCM_MAKE_VALIDATE (p, x, VM_FRAME_P)
/* FIXME rename scm_byte_t */
SCM_API SCM scm_c_make_vm_frame (SCM stack_holder, SCM *fp, SCM *sp,
scm_byte_t *ip, scm_t_ptrdiff offset);
SCM_API SCM scm_vm_frame_p (SCM obj);
SCM_API SCM scm_vm_frame_program (SCM frame);
SCM_API SCM scm_vm_frame_arguments (SCM frame);
SCM_API SCM scm_vm_frame_source (SCM frame);
SCM_API SCM scm_vm_frame_local_ref (SCM frame, SCM index);
SCM_API SCM scm_vm_frame_local_set_x (SCM frame, SCM index, SCM val);
SCM_API SCM scm_vm_frame_return_address (SCM frame);
SCM_API SCM scm_vm_frame_mv_return_address (SCM frame);
SCM_API SCM scm_vm_frame_dynamic_link (SCM frame);
SCM_API SCM scm_vm_frame_stack (SCM frame);
SCM_API SCM scm_c_vm_frame_prev (SCM frame);
SCM_INTERNAL void scm_bootstrap_frames (void);
SCM_INTERNAL void scm_init_frames (void);
#endif /* _SCM_FRAMES_H_ */
/*
Local Variables:
c-file-style: "gnu"
End:
*/
|