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a98cef7e KN |
1 | /* Copyright (C) 2000 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 | ||
17e90c5e | 42 | /* This file is included in vm.c twice */ |
a98cef7e KN |
43 | |
44 | #include "vm_engine.h" | |
45 | ||
a98cef7e | 46 | static SCM |
17e90c5e | 47 | vm_engine (SCM vm, SCM program, SCM args) |
a98cef7e KN |
48 | #define FUNC_NAME "vm-engine" |
49 | { | |
17e90c5e KN |
50 | /* VM registers */ |
51 | register scm_byte_t *ip IP_REG; /* instruction pointer */ | |
52 | register SCM *sp SP_REG; /* stack pointer */ | |
53 | register SCM *fp FP_REG; /* frame pointer */ | |
a98cef7e | 54 | |
d608d68d | 55 | /* Cache variables */ |
3d5ee0cd | 56 | struct scm_vm *vp = SCM_VM_DATA (vm); /* VM data pointer */ |
17e90c5e KN |
57 | struct scm_program *bp = NULL; /* program base pointer */ |
58 | SCM external; /* external environment */ | |
59 | SCM *objects = NULL; /* constant objects */ | |
3d5ee0cd KN |
60 | SCM *stack_base = vp->stack_base; /* stack base address */ |
61 | SCM *stack_limit = vp->stack_limit; /* stack limit address */ | |
a98cef7e | 62 | |
d608d68d | 63 | /* Internal variables */ |
17e90c5e | 64 | int nargs = 0; |
3d5ee0cd | 65 | long start_time = scm_c_get_internal_run_time (); |
17e90c5e KN |
66 | // SCM dynwinds = SCM_EOL; |
67 | SCM err_msg; | |
68 | SCM err_args; | |
69 | #if VM_USE_HOOKS | |
a98cef7e KN |
70 | SCM hook_args = SCM_LIST1 (vm); |
71 | #endif | |
72 | ||
17e90c5e | 73 | #ifdef HAVE_LABELS_AS_VALUES |
4b482259 KN |
74 | /* Jump talbe */ |
75 | static void *jump_table[] = { | |
17e90c5e | 76 | #define VM_INSTRUCTION_TO_LABEL 1 |
77c04abe KN |
77 | #include "vm_expand.h" |
78 | #include "vm_system.i" | |
79 | #include "vm_scheme.i" | |
80 | #include "vm_number.i" | |
17e90c5e | 81 | #include "vm_loader.i" |
77c04abe | 82 | #undef VM_INSTRUCTION_TO_LABEL |
4b482259 | 83 | }; |
17e90c5e | 84 | #endif |
a98cef7e | 85 | |
3d5ee0cd KN |
86 | /* Initialization */ |
87 | { | |
88 | /* Bootcode */ | |
89 | scm_byte_t bytes[3] = {scm_op_call, 0, scm_op_halt}; | |
90 | SCM bootcode = scm_c_make_program (bytes, 3, SCM_BOOL_T); | |
91 | bytes[1] = scm_ilength (args); | |
a98cef7e | 92 | |
3d5ee0cd KN |
93 | /* Initial frame */ |
94 | CACHE_REGISTER (); | |
95 | CACHE_PROGRAM (bootcode); | |
96 | NEW_FRAME (); | |
17e90c5e | 97 | |
3d5ee0cd KN |
98 | /* Initial arguments */ |
99 | for (; !SCM_NULLP (args); args = SCM_CDR (args)) | |
100 | PUSH (SCM_CAR (args)); | |
101 | PUSH (program); | |
102 | } | |
a98cef7e KN |
103 | |
104 | /* Let's go! */ | |
17e90c5e | 105 | BOOT_HOOK (); |
a98cef7e KN |
106 | |
107 | #ifndef HAVE_LABELS_AS_VALUES | |
17e90c5e KN |
108 | vm_start: |
109 | switch (*ip++) { | |
a98cef7e KN |
110 | #endif |
111 | ||
77c04abe | 112 | #include "vm_expand.h" |
a98cef7e KN |
113 | #include "vm_system.c" |
114 | #include "vm_scheme.c" | |
115 | #include "vm_number.c" | |
17e90c5e | 116 | #include "vm_loader.c" |
a98cef7e KN |
117 | |
118 | #ifndef HAVE_LABELS_AS_VALUES | |
119 | } | |
120 | #endif | |
121 | ||
17e90c5e KN |
122 | /* Errors */ |
123 | { | |
124 | vm_error_unbound: | |
125 | err_msg = scm_makfrom0str ("Unbound variable: ~A"); | |
126 | goto vm_error; | |
127 | ||
128 | vm_error_wrong_num_args: | |
129 | err_msg = scm_makfrom0str ("Wrong number of arguments"); | |
130 | err_args = SCM_EOL; | |
131 | goto vm_error; | |
132 | ||
133 | vm_error_wrong_type_apply: | |
134 | err_msg = scm_makfrom0str ("Wrong type to apply: ~S"); | |
135 | err_args = SCM_LIST1 (program); | |
136 | goto vm_error; | |
137 | ||
138 | #if VM_CHECK_IP | |
139 | vm_error_invalid_address: | |
140 | err_msg = scm_makfrom0str ("Invalid program address"); | |
141 | err_args = SCM_EOL; | |
142 | goto vm_error; | |
143 | #endif | |
144 | ||
145 | vm_error_stack_overflow: | |
146 | err_msg = scm_makfrom0str ("Stack overflow"); | |
147 | err_args = SCM_EOL; | |
148 | goto vm_error; | |
149 | ||
150 | vm_error_stack_underflow: | |
151 | err_msg = scm_makfrom0str ("Stack underflow"); | |
152 | err_args = SCM_EOL; | |
153 | goto vm_error; | |
154 | ||
155 | vm_error: | |
156 | SYNC_ALL (); | |
157 | scm_ithrow (sym_vm_error, | |
158 | SCM_LIST4 (sym_vm_engine, err_msg, err_args, | |
159 | scm_vm_current_frame (vm)), | |
160 | 1); | |
161 | } | |
162 | ||
a98cef7e KN |
163 | abort (); /* never reached */ |
164 | } | |
165 | #undef FUNC_NAME | |
17e90c5e KN |
166 | |
167 | /* | |
168 | Local Variables: | |
169 | c-file-style: "gnu" | |
170 | End: | |
171 | */ |