Commit | Line | Data |
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8f5cfc81 | 1 | /* Copyright (C) 2001 Free Software Foundation, Inc. |
8f5cfc81 | 2 | * |
560b9c25 | 3 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
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. | |
8f5cfc81 | 7 | * |
53befeb7 NJ |
8 | * This library is distributed in the hope that it will be useful, but |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
560b9c25 AW |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
11 | * Lesser General Public License for more details. | |
8f5cfc81 | 12 | * |
560b9c25 AW |
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 | |
53befeb7 NJ |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
16 | * 02110-1301 USA | |
560b9c25 | 17 | */ |
8f5cfc81 | 18 | |
13c47753 AW |
19 | #if HAVE_CONFIG_H |
20 | # include <config.h> | |
21 | #endif | |
22 | ||
8f5cfc81 KN |
23 | #include <string.h> |
24 | #include <fcntl.h> | |
25 | #include <unistd.h> | |
26 | #include <sys/mman.h> | |
27 | #include <sys/stat.h> | |
28 | #include <sys/types.h> | |
054599f1 | 29 | #include <assert.h> |
8f5cfc81 | 30 | |
560b9c25 | 31 | #include "_scm.h" |
83495480 | 32 | #include "vm-bootstrap.h" |
8f5cfc81 KN |
33 | #include "programs.h" |
34 | #include "objcodes.h" | |
35 | ||
53e28ed9 | 36 | /* nb, the length of the header should be a multiple of 8 bytes */ |
8f5cfc81 KN |
37 | #define OBJCODE_COOKIE "GOOF-0.5" |
38 | ||
39 | \f | |
40 | /* | |
41 | * Objcode type | |
42 | */ | |
43 | ||
f9e8c09d | 44 | scm_t_bits scm_tc16_objcode; |
8f5cfc81 | 45 | |
8f5cfc81 KN |
46 | static SCM |
47 | make_objcode_by_mmap (int fd) | |
48 | #define FUNC_NAME "make_objcode_by_mmap" | |
49 | { | |
50 | int ret; | |
51 | char *addr; | |
52 | struct stat st; | |
53e28ed9 AW |
53 | SCM sret = SCM_BOOL_F; |
54 | struct scm_objcode *data; | |
8f5cfc81 KN |
55 | |
56 | ret = fstat (fd, &st); | |
0b5f0e49 | 57 | if (ret < 0) |
62082959 | 58 | SCM_SYSERROR; |
8f5cfc81 | 59 | |
53e28ed9 | 60 | if (st.st_size <= sizeof (struct scm_objcode) + strlen (OBJCODE_COOKIE)) |
0b5f0e49 | 61 | scm_misc_error (FUNC_NAME, "object file too small (~a bytes)", |
da8b4747 | 62 | scm_list_1 (SCM_I_MAKINUM (st.st_size))); |
0b5f0e49 | 63 | |
8f5cfc81 | 64 | addr = mmap (0, st.st_size, PROT_READ, MAP_SHARED, fd, 0); |
62082959 LC |
65 | if (addr == MAP_FAILED) |
66 | SCM_SYSERROR; | |
67 | ||
68 | if (memcmp (addr, OBJCODE_COOKIE, strlen (OBJCODE_COOKIE))) | |
74fdb02e AW |
69 | scm_misc_error (FUNC_NAME, "bad header on object file: ~s", |
70 | scm_list_1 (scm_from_locale_stringn | |
71 | (addr, strlen (OBJCODE_COOKIE)))); | |
8f5cfc81 | 72 | |
53e28ed9 AW |
73 | data = (struct scm_objcode*)(addr + strlen (OBJCODE_COOKIE)); |
74 | ||
1f1ec13b | 75 | if (data->len + data->metalen != (st.st_size - sizeof (*data) - strlen (OBJCODE_COOKIE))) |
53e28ed9 | 76 | scm_misc_error (FUNC_NAME, "bad length header (~a, ~a)", |
da8b4747 LC |
77 | scm_list_2 (scm_from_size_t (st.st_size), |
78 | scm_from_uint32 (sizeof (*data) + data->len + data->metalen))); | |
53e28ed9 AW |
79 | |
80 | SCM_NEWSMOB3 (sret, scm_tc16_objcode, addr + strlen (OBJCODE_COOKIE), | |
81 | SCM_PACK (SCM_BOOL_F), fd); | |
82 | SCM_SET_SMOB_FLAGS (sret, SCM_F_OBJCODE_IS_MMAP); | |
83 | ||
84 | /* FIXME: we leak ourselves and the file descriptor. but then again so does | |
85 | dlopen(). */ | |
86 | return scm_permanent_object (sret); | |
8f5cfc81 KN |
87 | } |
88 | #undef FUNC_NAME | |
89 | ||
53e28ed9 AW |
90 | SCM |
91 | scm_c_make_objcode_slice (SCM parent, scm_t_uint8 *ptr) | |
92 | #define FUNC_NAME "make-objcode-slice" | |
8f5cfc81 | 93 | { |
53e28ed9 AW |
94 | struct scm_objcode *data, *parent_data; |
95 | SCM ret; | |
96 | ||
97 | SCM_VALIDATE_OBJCODE (1, parent); | |
98 | parent_data = SCM_OBJCODE_DATA (parent); | |
99 | ||
100 | if (ptr < parent_data->base | |
1f1ec13b | 101 | || ptr >= (parent_data->base + parent_data->len + parent_data->metalen |
53e28ed9 | 102 | - sizeof (struct scm_objcode))) |
1f1ec13b | 103 | scm_misc_error (FUNC_NAME, "offset out of bounds (~a vs ~a + ~a + ~a)", |
da8b4747 LC |
104 | scm_list_4 (scm_from_ulong ((unsigned long)ptr), |
105 | scm_from_ulong ((unsigned long)parent_data->base), | |
106 | scm_from_uint32 (parent_data->len), | |
107 | scm_from_uint32 (parent_data->metalen))); | |
53e28ed9 AW |
108 | |
109 | data = (struct scm_objcode*)ptr; | |
1f1ec13b | 110 | if (data->base + data->len + data->metalen > parent_data->base + parent_data->len + parent_data->metalen) |
53e28ed9 AW |
111 | abort (); |
112 | ||
113 | SCM_NEWSMOB2 (ret, scm_tc16_objcode, data, parent); | |
114 | SCM_SET_SMOB_FLAGS (ret, SCM_F_OBJCODE_IS_SLICE); | |
115 | return ret; | |
8f5cfc81 KN |
116 | } |
117 | #undef FUNC_NAME | |
118 | ||
53e28ed9 AW |
119 | static SCM |
120 | objcode_mark (SCM obj) | |
121 | { | |
122 | return SCM_SMOB_OBJECT_2 (obj); | |
123 | } | |
124 | ||
8f5cfc81 KN |
125 | \f |
126 | /* | |
127 | * Scheme interface | |
128 | */ | |
129 | ||
130 | SCM_DEFINE (scm_objcode_p, "objcode?", 1, 0, 0, | |
131 | (SCM obj), | |
132 | "") | |
133 | #define FUNC_NAME s_scm_objcode_p | |
134 | { | |
135 | return SCM_BOOL (SCM_OBJCODE_P (obj)); | |
136 | } | |
137 | #undef FUNC_NAME | |
138 | ||
1f1ec13b AW |
139 | SCM_DEFINE (scm_objcode_meta, "objcode-meta", 1, 0, 0, |
140 | (SCM objcode), | |
141 | "") | |
142 | #define FUNC_NAME s_scm_objcode_meta | |
143 | { | |
144 | SCM_VALIDATE_OBJCODE (1, objcode); | |
145 | ||
146 | if (SCM_OBJCODE_META_LEN (objcode) == 0) | |
147 | return SCM_BOOL_F; | |
148 | else | |
149 | return scm_c_make_objcode_slice (objcode, (SCM_OBJCODE_BASE (objcode) | |
150 | + SCM_OBJCODE_LEN (objcode))); | |
151 | } | |
152 | #undef FUNC_NAME | |
153 | ||
53e28ed9 AW |
154 | SCM_DEFINE (scm_bytecode_to_objcode, "bytecode->objcode", 1, 0, 0, |
155 | (SCM bytecode), | |
8f5cfc81 KN |
156 | "") |
157 | #define FUNC_NAME s_scm_bytecode_to_objcode | |
158 | { | |
159 | size_t size; | |
054599f1 LC |
160 | ssize_t increment; |
161 | scm_t_array_handle handle; | |
b6368dbb | 162 | const scm_t_uint8 *c_bytecode; |
53e28ed9 | 163 | struct scm_objcode *data; |
8f5cfc81 KN |
164 | SCM objcode; |
165 | ||
53e28ed9 | 166 | if (scm_is_false (scm_u8vector_p (bytecode))) |
054599f1 | 167 | scm_wrong_type_arg (FUNC_NAME, 1, bytecode); |
8f5cfc81 | 168 | |
054599f1 | 169 | c_bytecode = scm_u8vector_elements (bytecode, &handle, &size, &increment); |
53e28ed9 AW |
170 | data = (struct scm_objcode*)c_bytecode; |
171 | SCM_NEWSMOB2 (objcode, scm_tc16_objcode, data, bytecode); | |
054599f1 | 172 | scm_array_handle_release (&handle); |
ac47d5f6 AW |
173 | |
174 | SCM_ASSERT_RANGE (0, bytecode, size >= sizeof(struct scm_objcode)); | |
175 | if (data->len + data->metalen != (size - sizeof (*data))) | |
176 | scm_misc_error (FUNC_NAME, "bad u8vector size (~a != ~a)", | |
da8b4747 LC |
177 | scm_list_2 (scm_from_size_t (size), |
178 | scm_from_uint32 (sizeof (*data) + data->len + data->metalen))); | |
53e28ed9 | 179 | assert (increment == 1); |
53e28ed9 AW |
180 | SCM_SET_SMOB_FLAGS (objcode, SCM_F_OBJCODE_IS_U8VECTOR); |
181 | ||
182 | /* foolishly, we assume that as long as bytecode is around, that c_bytecode | |
183 | will be of the same length; perhaps a bad assumption? */ | |
d8eeb67c | 184 | |
8f5cfc81 KN |
185 | return objcode; |
186 | } | |
187 | #undef FUNC_NAME | |
188 | ||
189 | SCM_DEFINE (scm_load_objcode, "load-objcode", 1, 0, 0, | |
190 | (SCM file), | |
191 | "") | |
192 | #define FUNC_NAME s_scm_load_objcode | |
193 | { | |
194 | int fd; | |
2d80426a | 195 | char *c_file; |
8f5cfc81 KN |
196 | |
197 | SCM_VALIDATE_STRING (1, file); | |
198 | ||
2d80426a LC |
199 | c_file = scm_to_locale_string (file); |
200 | fd = open (c_file, O_RDONLY); | |
201 | free (c_file); | |
8f5cfc81 KN |
202 | if (fd < 0) SCM_SYSERROR; |
203 | ||
204 | return make_objcode_by_mmap (fd); | |
205 | } | |
206 | #undef FUNC_NAME | |
207 | ||
9bb8012d | 208 | SCM_DEFINE (scm_objcode_to_bytecode, "objcode->bytecode", 1, 0, 0, |
8f5cfc81 KN |
209 | (SCM objcode), |
210 | "") | |
9bb8012d | 211 | #define FUNC_NAME s_scm_objcode_to_bytecode |
8f5cfc81 | 212 | { |
b6368dbb | 213 | scm_t_uint8 *u8vector; |
53e28ed9 | 214 | scm_t_uint32 len; |
054599f1 | 215 | |
8f5cfc81 | 216 | SCM_VALIDATE_OBJCODE (1, objcode); |
054599f1 | 217 | |
1f1ec13b | 218 | len = sizeof(struct scm_objcode) + SCM_OBJCODE_TOTAL_LEN (objcode); |
054599f1 | 219 | /* FIXME: Is `gc_malloc' ok here? */ |
53e28ed9 AW |
220 | u8vector = scm_gc_malloc (len, "objcode-u8vector"); |
221 | memcpy (u8vector, SCM_OBJCODE_DATA (objcode), len); | |
054599f1 | 222 | |
53e28ed9 | 223 | return scm_take_u8vector (u8vector, len); |
8f5cfc81 KN |
224 | } |
225 | #undef FUNC_NAME | |
226 | ||
53e28ed9 AW |
227 | SCM_DEFINE (scm_write_objcode, "write-objcode", 2, 0, 0, |
228 | (SCM objcode, SCM port), | |
8f5cfc81 | 229 | "") |
53e28ed9 | 230 | #define FUNC_NAME s_scm_write_objcode |
8f5cfc81 | 231 | { |
8f5cfc81 | 232 | SCM_VALIDATE_OBJCODE (1, objcode); |
53e28ed9 AW |
233 | SCM_VALIDATE_OUTPUT_PORT (2, port); |
234 | ||
235 | scm_c_write (port, OBJCODE_COOKIE, strlen (OBJCODE_COOKIE)); | |
236 | scm_c_write (port, SCM_OBJCODE_DATA (objcode), | |
1f1ec13b | 237 | sizeof (struct scm_objcode) + SCM_OBJCODE_TOTAL_LEN (objcode)); |
53e28ed9 AW |
238 | |
239 | return SCM_UNSPECIFIED; | |
8f5cfc81 KN |
240 | } |
241 | #undef FUNC_NAME | |
242 | ||
243 | \f | |
244 | void | |
07e56b27 | 245 | scm_bootstrap_objcodes (void) |
8f5cfc81 KN |
246 | { |
247 | scm_tc16_objcode = scm_make_smob_type ("objcode", 0); | |
53e28ed9 | 248 | scm_set_smob_mark (scm_tc16_objcode, objcode_mark); |
60ae5ca2 AW |
249 | scm_c_register_extension ("libguile", "scm_init_objcodes", |
250 | (scm_t_extension_init_func)scm_init_objcodes, NULL); | |
07e56b27 AW |
251 | } |
252 | ||
8992a9e3 AW |
253 | /* Before, we used __BYTE_ORDER, but that is not defined on all |
254 | systems. So punt and use automake, PDP endianness be damned. */ | |
255 | #ifdef WORDS_BIGENDIAN | |
256 | #define SCM_BYTE_ORDER 4321 | |
257 | #else | |
258 | #define SCM_BYTE_ORDER 1234 | |
259 | #endif | |
260 | ||
07e56b27 AW |
261 | void |
262 | scm_init_objcodes (void) | |
263 | { | |
264 | scm_bootstrap_vm (); | |
8f5cfc81 KN |
265 | |
266 | #ifndef SCM_MAGIC_SNARFER | |
aeeff258 | 267 | #include "libguile/objcodes.x" |
8f5cfc81 | 268 | #endif |
53e28ed9 AW |
269 | |
270 | scm_c_define ("word-size", scm_from_size_t (sizeof(SCM))); | |
8992a9e3 | 271 | scm_c_define ("byte-order", scm_from_uint16 (SCM_BYTE_ORDER)); |
8f5cfc81 KN |
272 | } |
273 | ||
274 | /* | |
275 | Local Variables: | |
276 | c-file-style: "gnu" | |
277 | End: | |
278 | */ |