aboutsummaryrefslogtreecommitdiff
path: root/dyngen.c
blob: d301c714fc11e7d0b8660586fbeece898b0af8a6 (plain)
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
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
/*
 *  Generic Dynamic compiler generator
 *
 *  Copyright (c) 2003 Fabrice Bellard
 *
 *  The COFF object format support was extracted from Kazu's QEMU port
 *  to Win32.
 *
 *  Mach-O Support by Matt Reda and Pierre d'Herbemont
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <inttypes.h>
#include <unistd.h>
#include <fcntl.h>

#include "config-host.h"

/* NOTE: we test CONFIG_WIN32 instead of _WIN32 to enabled cross
   compilation */
#if defined(CONFIG_WIN32)
#define CONFIG_FORMAT_COFF
#elif defined(CONFIG_DARWIN)
#define CONFIG_FORMAT_MACH
#else
#define CONFIG_FORMAT_ELF
#endif

#ifdef CONFIG_FORMAT_ELF

/* elf format definitions. We use these macros to test the CPU to
   allow cross compilation (this tool must be ran on the build
   platform) */
#if defined(HOST_I386)

#define ELF_CLASS	ELFCLASS32
#define ELF_ARCH	EM_386
#define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )
#undef ELF_USES_RELOCA

#elif defined(HOST_X86_64)

#define ELF_CLASS	ELFCLASS64
#define ELF_ARCH	EM_X86_64
#define elf_check_arch(x) ((x) == EM_X86_64)
#define ELF_USES_RELOCA

#elif defined(HOST_PPC)

#define ELF_CLASS	ELFCLASS32
#define ELF_ARCH	EM_PPC
#define elf_check_arch(x) ((x) == EM_PPC)
#define ELF_USES_RELOCA

#elif defined(HOST_S390)

#define ELF_CLASS	ELFCLASS32
#define ELF_ARCH	EM_S390
#define elf_check_arch(x) ((x) == EM_S390)
#define ELF_USES_RELOCA

#elif defined(HOST_ALPHA)

#define ELF_CLASS	ELFCLASS64
#define ELF_ARCH	EM_ALPHA
#define elf_check_arch(x) ((x) == EM_ALPHA)
#define ELF_USES_RELOCA

#elif defined(HOST_IA64)

#define ELF_CLASS	ELFCLASS64
#define ELF_ARCH	EM_IA_64
#define elf_check_arch(x) ((x) == EM_IA_64)
#define ELF_USES_RELOCA

#elif defined(HOST_SPARC)

#define ELF_CLASS	ELFCLASS32
#define ELF_ARCH	EM_SPARC
#define elf_check_arch(x) ((x) == EM_SPARC || (x) == EM_SPARC32PLUS)
#define ELF_USES_RELOCA

#elif defined(HOST_SPARC64)

#define ELF_CLASS	ELFCLASS64
#define ELF_ARCH	EM_SPARCV9
#define elf_check_arch(x) ((x) == EM_SPARCV9)
#define ELF_USES_RELOCA

#elif defined(HOST_ARM)

#define ELF_CLASS	ELFCLASS32
#define ELF_ARCH	EM_ARM
#define elf_check_arch(x) ((x) == EM_ARM)
#define ELF_USES_RELOC

#elif defined(HOST_M68K)

#define ELF_CLASS	ELFCLASS32
#define ELF_ARCH	EM_68K
#define elf_check_arch(x) ((x) == EM_68K)
#define ELF_USES_RELOCA

#elif defined(HOST_MIPS)

#define ELF_CLASS	ELFCLASS32
#define ELF_ARCH	EM_MIPS
#define elf_check_arch(x) ((x) == EM_MIPS)
#define ELF_USES_RELOC

#elif defined(HOST_MIPS64)

/* Assume n32 ABI here, which is ELF32. */
#define ELF_CLASS	ELFCLASS32
#define ELF_ARCH	EM_MIPS
#define elf_check_arch(x) ((x) == EM_MIPS)
#define ELF_USES_RELOCA

#else
#error unsupported CPU - please update the code
#endif

#include "elf.h"

#if ELF_CLASS == ELFCLASS32
typedef int32_t host_long;
typedef uint32_t host_ulong;
#define swabls(x) swab32s(x)
#define swablss(x) swab32ss(x)
#else
typedef int64_t host_long;
typedef uint64_t host_ulong;
#define swabls(x) swab64s(x)
#define swablss(x) swab64ss(x)
#endif

#ifdef ELF_USES_RELOCA
#define SHT_RELOC SHT_RELA
#else
#define SHT_RELOC SHT_REL
#endif

#define EXE_RELOC ELF_RELOC
#define EXE_SYM ElfW(Sym)

#endif /* CONFIG_FORMAT_ELF */

#ifdef CONFIG_FORMAT_COFF

typedef int32_t host_long;
typedef uint32_t host_ulong;

#include "a.out.h"

#define FILENAMELEN 256

typedef struct coff_sym {
    struct external_syment *st_syment;
    char st_name[FILENAMELEN];
    uint32_t st_value;
    int  st_size;
    uint8_t st_type;
    uint8_t st_shndx;
} coff_Sym;

typedef struct coff_rel {
    struct external_reloc *r_reloc;
    int  r_offset;
    uint8_t r_type;
} coff_Rel;

#define EXE_RELOC struct coff_rel
#define EXE_SYM struct coff_sym

#endif /* CONFIG_FORMAT_COFF */

#ifdef CONFIG_FORMAT_MACH

#include <mach-o/loader.h>
#include <mach-o/nlist.h>
#include <mach-o/reloc.h>
#include <mach-o/ppc/reloc.h>

# define check_mach_header(x) (x.magic == MH_MAGIC)
typedef int32_t host_long;
typedef uint32_t host_ulong;

struct nlist_extended
{
   union {
   char *n_name;
   long  n_strx;
   } n_un;
   unsigned char n_type;
   unsigned char n_sect;
   short st_desc;
   unsigned long st_value;
   unsigned long st_size;
};

#define EXE_RELOC struct relocation_info
#define EXE_SYM struct nlist_extended

#endif /* CONFIG_FORMAT_MACH */

#include "bswap.h"

enum {
    OUT_GEN_OP,
    OUT_CODE,
    OUT_INDEX_OP,
};

/* all dynamically generated functions begin with this code */
#define OP_PREFIX "op_"

int do_swap;

static void __attribute__((noreturn)) __attribute__((format (printf, 1, 2))) error(const char *fmt, ...)
{
    va_list ap;
    va_start(ap, fmt);
    fprintf(stderr, "dyngen: ");
    vfprintf(stderr, fmt, ap);
    fprintf(stderr, "\n");
    va_end(ap);
    exit(1);
}

static void *load_data(int fd, long offset, unsigned int size)
{
    char *data;

    data = malloc(size);
    if (!data)
        return NULL;
    lseek(fd, offset, SEEK_SET);
    if (read(fd, data, size) != size) {
        free(data);
        return NULL;
    }
    return data;
}

int strstart(const char *str, const char *val, const char **ptr)
{
    const char *p, *q;
    p = str;
    q = val;
    while (*q != '\0') {
        if (*p != *q)
            return 0;
        p++;
        q++;
    }
    if (ptr)
        *ptr = p;
    return 1;
}

void pstrcpy(char *buf, int buf_size, const char *str)
{
    int c;
    char *q = buf;

    if (buf_size <= 0)
        return;

    for(;;) {
        c = *str++;
        if (c == 0 || q >= buf + buf_size - 1)
            break;
        *q++ = c;
    }
    *q = '\0';
}

void swab16s(uint16_t *p)
{
    *p = bswap16(*p);
}

void swab32s(uint32_t *p)
{
    *p = bswap32(*p);
}

void swab32ss(int32_t *p)
{
    *p = bswap32(*p);
}

void swab64s(uint64_t *p)
{
    *p = bswap64(*p);
}

void swab64ss(int64_t *p)
{
    *p = bswap64(*p);
}

uint16_t get16(uint16_t *p)
{
    uint16_t val;
    val = *p;
    if (do_swap)
        val = bswap16(val);
    return val;
}

uint32_t get32(uint32_t *p)
{
    uint32_t val;
    val = *p;
    if (do_swap)
        val = bswap32(val);
    return val;
}

void put16(uint16_t *p, uint16_t val)
{
    if (do_swap)
        val = bswap16(val);
    *p = val;
}

void put32(uint32_t *p, uint32_t val)
{
    if (do_swap)
        val = bswap32(val);
    *p = val;
}

/* executable information */
EXE_SYM *symtab;
int nb_syms;
int text_shndx;
uint8_t *text;
EXE_RELOC *relocs;
int nb_relocs;

#ifdef CONFIG_FORMAT_ELF

/* ELF file info */
struct elf_shdr *shdr;
uint8_t **sdata;
struct elfhdr ehdr;
char *strtab;

int elf_must_swap(struct elfhdr *h)
{
  union {
      uint32_t i;
      uint8_t b[4];
  } swaptest;

  swaptest.i = 1;
  return (h->e_ident[EI_DATA] == ELFDATA2MSB) !=
      (swaptest.b[0] == 0);
}

void elf_swap_ehdr(struct elfhdr *h)
{
    swab16s(&h->e_type);			/* Object file type */
    swab16s(&h->	e_machine);		/* Architecture */
    swab32s(&h->	e_version);		/* Object file version */
    swabls(&h->	e_entry);		/* Entry point virtual address */
    swabls(&h->	e_phoff);		/* Program header table file offset */
    swabls(&h->	e_shoff);		/* Section header table file offset */
    swab32s(&h->	e_flags);		/* Processor-specific flags */
    swab16s(&h->	e_ehsize);		/* ELF header size in bytes */
    swab16s(&h->	e_phentsize);		/* Program header table entry size */
    swab16s(&h->	e_phnum);		/* Program header table entry count */
    swab16s(&h->	e_shentsize);		/* Section header table entry size */
    swab16s(&h->	e_shnum);		/* Section header table entry count */
    swab16s(&h->	e_shstrndx);		/* Section header string table index */
}

void elf_swap_shdr(struct elf_shdr *h)
{
  swab32s(&h->	sh_name);		/* Section name (string tbl index) */
  swab32s(&h->	sh_type);		/* Section type */
  swabls(&h->	sh_flags);		/* Section flags */
  swabls(&h->	sh_addr);		/* Section virtual addr at execution */
  swabls(&h->	sh_offset);		/* Section file offset */
  swabls(&h->	sh_size);		/* Section size in bytes */
  swab32s(&h->	sh_link);		/* Link to another section */
  swab32s(&h->	sh_info);		/* Additional section information */
  swabls(&h->	sh_addralign);		/* Section alignment */
  swabls(&h->	sh_entsize);		/* Entry size if section holds table */
}

void elf_swap_phdr(struct elf_phdr *h)
{
    swab32s(&h->p_type);			/* Segment type */
    swabls(&h->p_offset);		/* Segment file offset */
    swabls(&h->p_vaddr);		/* Segment virtual address */
    swabls(&h->p_paddr);		/* Segment physical address */
    swabls(&h->p_filesz);		/* Segment size in file */
    swabls(&h->p_memsz);		/* Segment size in memory */
    swab32s(&h->p_flags);		/* Segment flags */
    swabls(&h->p_align);		/* Segment alignment */
}

void elf_swap_rel(ELF_RELOC *rel)
{
    swabls(&rel->r_offset);
    swabls(&rel->r_info);
#ifdef ELF_USES_RELOCA
    swablss(&rel->r_addend);
#endif
}

struct elf_shdr *find_elf_section(struct elf_shdr *shdr, int shnum, const char *shstr,
                                  const char *name)
{
    int i;
    const char *shname;
    struct elf_shdr *sec;

    for(i = 0; i < shnum; i++) {
        sec = &shdr[i];
        if (!sec->sh_name)
            continue;
        shname = shstr + sec->sh_name;
        if (!strcmp(shname, name))
            return sec;
    }
    return NULL;
}

int find_reloc(int sh_index)
{
    struct elf_shdr *sec;
    int i;

    for(i = 0; i < ehdr.e_shnum; i++) {
        sec = &shdr[i];
        if (sec->sh_type == SHT_RELOC && sec->sh_info == sh_index)
            return i;
    }
    return 0;
}

static host_ulong get_rel_offset(EXE_RELOC *rel)
{
    return rel->r_offset;
}

static char *get_rel_sym_name(EXE_RELOC *rel)
{
    return strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
}

static char *get_sym_name(EXE_SYM *sym)
{
    return strtab + sym->st_name;
}

/* load an elf object file */
int load_object(const char *filename)
{
    int fd;
    struct elf_shdr *sec, *symtab_sec, *strtab_sec, *text_sec;
    int i, j;
    ElfW(Sym) *sym;
    char *shstr;
    ELF_RELOC *rel;

    fd = open(filename, O_RDONLY);
    if (fd < 0)
        error("can't open file '%s'", filename);

    /* Read ELF header.  */
    if (read(fd, &ehdr, sizeof (ehdr)) != sizeof (ehdr))
        error("unable to read file header");

    /* Check ELF identification.  */
    if (ehdr.e_ident[EI_MAG0] != ELFMAG0
     || ehdr.e_ident[EI_MAG1] != ELFMAG1
     || ehdr.e_ident[EI_MAG2] != ELFMAG2
     || ehdr.e_ident[EI_MAG3] != ELFMAG3
     || ehdr.e_ident[EI_VERSION] != EV_CURRENT) {
        error("bad ELF header");
    }

    do_swap = elf_must_swap(&ehdr);
    if (do_swap)
        elf_swap_ehdr(&ehdr);
    if (ehdr.e_ident[EI_CLASS] != ELF_CLASS)
        error("Unsupported ELF class");
    if (ehdr.e_type != ET_REL)
        error("ELF object file expected");
    if (ehdr.e_version != EV_CURRENT)
        error("Invalid ELF version");
    if (!elf_check_arch(ehdr.e_machine))
        error("Unsupported CPU (e_machine=%d)", ehdr.e_machine);

    /* read section headers */
    shdr = load_data(fd, ehdr.e_shoff, ehdr.e_shnum * sizeof(struct elf_shdr));
    if (do_swap) {
        for(i = 0; i < ehdr.e_shnum; i++) {
            elf_swap_shdr(&shdr[i]);
        }
    }

    /* read all section data */
    sdata = malloc(sizeof(void *) * ehdr.e_shnum);
    memset(sdata, 0, sizeof(void *) * ehdr.e_shnum);

    for(i = 0;i < ehdr.e_shnum; i++) {
        sec = &shdr[i];
        if (sec->sh_type != SHT_NOBITS)
            sdata[i] = load_data(fd, sec->sh_offset, sec->sh_size);
    }

    sec = &shdr[ehdr.e_shstrndx];
    shstr = (char *)sdata[ehdr.e_shstrndx];

    /* swap relocations */
    for(i = 0; i < ehdr.e_shnum; i++) {
        sec = &shdr[i];
        if (sec->sh_type == SHT_RELOC) {
            nb_relocs = sec->sh_size / sec->sh_entsize;
            if (do_swap) {
                for(j = 0, rel = (ELF_RELOC *)sdata[i]; j < nb_relocs; j++, rel++)
                    elf_swap_rel(rel);
            }
        }
    }
    /* text section */

    text_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".text");
    if (!text_sec)
        error("could not find .text section");
    text_shndx = text_sec - shdr;
    text = sdata[text_shndx];

    /* find text relocations, if any */
    relocs = NULL;
    nb_relocs = 0;
    i = find_reloc(text_shndx);
    if (i != 0) {
        relocs = (ELF_RELOC *)sdata[i];
        nb_relocs = shdr[i].sh_size / shdr[i].sh_entsize;
    }

    symtab_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".symtab");
    if (!symtab_sec)
        error("could not find .symtab section");
    strtab_sec = &shdr[symtab_sec->sh_link];

    symtab = (ElfW(Sym) *)sdata[symtab_sec - shdr];
    strtab = (char *)sdata[symtab_sec->sh_link];

    nb_syms = symtab_sec->sh_size / sizeof(ElfW(Sym));
    if (do_swap) {
        for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
            swab32s(&sym->st_name);
            swabls(&sym->st_value);
            swabls(&sym->st_size);
            swab16s(&sym->st_shndx);
        }
    }
    close(fd);
    return 0;
}

#endif /* CONFIG_FORMAT_ELF */

#ifdef CONFIG_FORMAT_COFF

/* COFF file info */
struct external_scnhdr *shdr;
uint8_t **sdata;
struct external_filehdr fhdr;
struct external_syment *coff_symtab;
char *strtab;
int coff_text_shndx, coff_data_shndx;

int data_shndx;

#define STRTAB_SIZE 4

#define DIR32   0x06
#define DISP32  0x14

#define T_FUNCTION  0x20
#define C_EXTERNAL  2

void sym_ent_name(struct external_syment *ext_sym, EXE_SYM *sym)
{
    char *q;
    int c, i, len;

    if (ext_sym->e.e.e_zeroes != 0) {
        q = sym->st_name;
        for(i = 0; i < 8; i++) {
            c = ext_sym->e.e_name[i];
            if (c == '\0')
                break;
            *q++ = c;
        }
        *q = '\0';
    } else {
        pstrcpy(sym->st_name, sizeof(sym->st_name), strtab + ext_sym->e.e.e_offset);
    }

    /* now convert the name to a C name (suppress the leading '_') */
    if (sym->st_name[0] == '_') {
        len = strlen(sym->st_name);
        memmove(sym->st_name, sym->st_name + 1, len - 1);
        sym->st_name[len - 1] = '\0';
    }
}

char *name_for_dotdata(struct coff_rel *rel)
{
	int i;
	struct coff_sym *sym;
	uint32_t text_data;

	text_data = *(uint32_t *)(text + rel->r_offset);

	for (i = 0, sym = symtab; i < nb_syms; i++, sym++) {
		if (sym->st_syment->e_scnum == data_shndx &&
                    text_data >= sym->st_value &&
                    text_data < sym->st_value + sym->st_size) {

                    return sym->st_name;

		}
	}
	return NULL;
}

static char *get_sym_name(EXE_SYM *sym)
{
    return sym->st_name;
}

static char *get_rel_sym_name(EXE_RELOC *rel)
{
    char *name;
    name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx));
    if (!strcmp(name, ".data"))
        name = name_for_dotdata(rel);
    if (name[0] == '.')
        return NULL;
    return name;
}

static host_ulong get_rel_offset(EXE_RELOC *rel)
{
    return rel->r_offset;
}

struct external_scnhdr *find_coff_section(struct external_scnhdr *shdr, int shnum, const char *name)
{
    int i;
    const char *shname;
    struct external_scnhdr *sec;

    for(i = 0; i < shnum; i++) {
        sec = &shdr[i];
        if (!sec->s_name)
            continue;
        shname = sec->s_name;
        if (!strcmp(shname, name))
            return sec;
    }
    return NULL;
}

/* load a coff object file */
int load_object(const char *filename)
{
    int fd;
    struct external_scnhdr *sec, *text_sec, *data_sec;
    int i;
    struct external_syment *ext_sym;
    struct external_reloc *coff_relocs;
    struct external_reloc *ext_rel;
    uint32_t *n_strtab;
    EXE_SYM *sym;
    EXE_RELOC *rel;
    const char *p;
    int aux_size, j;

    fd = open(filename, O_RDONLY
#ifdef _WIN32
              | O_BINARY
#endif
              );
    if (fd < 0)
        error("can't open file '%s'", filename);

    /* Read COFF header.  */
    if (read(fd, &fhdr, sizeof (fhdr)) != sizeof (fhdr))
        error("unable to read file header");

    /* Check COFF identification.  */
    if (fhdr.f_magic != I386MAGIC) {
        error("bad COFF header");
    }
    do_swap = 0;

    /* read section headers */
    shdr = load_data(fd, sizeof(struct external_filehdr) + fhdr.f_opthdr, fhdr.f_nscns * sizeof(struct external_scnhdr));

    /* read all section data */
    sdata = malloc(sizeof(void *) * fhdr.f_nscns);
    memset(sdata, 0, sizeof(void *) * fhdr.f_nscns);

    for(i = 0;i < fhdr.f_nscns; i++) {
        sec = &shdr[i];
        if (!strstart(sec->s_name,  ".bss", &p))
            sdata[i] = load_data(fd, sec->s_scnptr, sec->s_size);
    }


    /* text section */
    text_sec = find_coff_section(shdr, fhdr.f_nscns, ".text");
    if (!text_sec)
        error("could not find .text section");
    coff_text_shndx = text_sec - shdr;
    text = sdata[coff_text_shndx];

    /* data section */
    data_sec = find_coff_section(shdr, fhdr.f_nscns, ".data");
    if (!data_sec)
        error("could not find .data section");
    coff_data_shndx = data_sec - shdr;

    coff_symtab = load_data(fd, fhdr.f_symptr, fhdr.f_nsyms*SYMESZ);
    for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) {
        for(i=0;i<8;i++)
            printf(" %02x", ((uint8_t *)ext_sym->e.e_name)[i]);
        printf("\n");
    }


    n_strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), STRTAB_SIZE);
    strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), *n_strtab);

    nb_syms = fhdr.f_nsyms;

    for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) {
      if (strstart(ext_sym->e.e_name, ".text", NULL))
		  text_shndx = ext_sym->e_scnum;
	  if (strstart(ext_sym->e.e_name, ".data", NULL))
		  data_shndx = ext_sym->e_scnum;
    }

	/* set coff symbol */
	symtab = malloc(sizeof(struct coff_sym) * nb_syms);

	for (i = 0, ext_sym = coff_symtab, sym = symtab; i < nb_syms; i++, ext_sym++, sym++) {
		memset(sym, 0, sizeof(*sym));
		sym->st_syment = ext_sym;
		sym_ent_name(ext_sym, sym);
		sym->st_value = ext_sym->e_value;

		aux_size = *(int8_t *)ext_sym->e_numaux;
		if (ext_sym->e_scnum == text_shndx && ext_sym->e_type == T_FUNCTION) {
			for (j = aux_size + 1; j < nb_syms - i; j++) {
				if ((ext_sym + j)->e_scnum == text_shndx &&
					(ext_sym + j)->e_type == T_FUNCTION ){
					sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value;
					break;
				} else if (j == nb_syms - i - 1) {
					sec = &shdr[coff_text_shndx];
					sym->st_size = sec->s_size - ext_sym->e_value;
					break;
				}
			}
		} else if (ext_sym->e_scnum == data_shndx && *(uint8_t *)ext_sym->e_sclass == C_EXTERNAL) {
			for (j = aux_size + 1; j < nb_syms - i; j++) {
				if ((ext_sym + j)->e_scnum == data_shndx) {
					sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value;
					break;
				} else if (j == nb_syms - i - 1) {
					sec = &shdr[coff_data_shndx];
					sym->st_size = sec->s_size - ext_sym->e_value;
					break;
				}
			}
		} else {
			sym->st_size = 0;
		}

		sym->st_type = ext_sym->e_type;
		sym->st_shndx = ext_sym->e_scnum;
	}


    /* find text relocations, if any */
    sec = &shdr[coff_text_shndx];
    coff_relocs = load_data(fd, sec->s_relptr, sec->s_nreloc*RELSZ);
    nb_relocs = sec->s_nreloc;

    /* set coff relocation */
    relocs = malloc(sizeof(struct coff_rel) * nb_relocs);
    for (i = 0, ext_rel = coff_relocs, rel = relocs; i < nb_relocs;
         i++, ext_rel++, rel++) {
        memset(rel, 0, sizeof(*rel));
        rel->r_reloc = ext_rel;
        rel->r_offset = *(uint32_t *)ext_rel->r_vaddr;
        rel->r_type = *(uint16_t *)ext_rel->r_type;
    }
    return 0;
}

#endif /* CONFIG_FORMAT_COFF */

#ifdef CONFIG_FORMAT_MACH

/* File Header */
struct mach_header 	mach_hdr;

/* commands */
struct segment_command 	*segment = 0;
struct dysymtab_command *dysymtabcmd = 0;
struct symtab_command 	*symtabcmd = 0;

/* section */
struct section 	*section_hdr;
struct section *text_sec_hdr;
uint8_t 	**sdata;

/* relocs */
struct relocation_info *relocs;

/* symbols */
EXE_SYM			*symtab;
struct nlist 	*symtab_std;
char			*strtab;

/* indirect symbols */
uint32_t 	*tocdylib;

/* Utility functions */

static inline char *find_str_by_index(int index)
{
    return strtab+index;
}

/* Used by dyngen common code */
static char *get_sym_name(EXE_SYM *sym)
{
	char *name = find_str_by_index(sym->n_un.n_strx);

	if ( sym->n_type & N_STAB ) /* Debug symbols are ignored */
		return "debug";

	if(!name)
		return name;
	if(name[0]=='_')
		return name + 1;
	else
		return name;
}

/* find a section index given its segname, sectname */
static int find_mach_sec_index(struct section *section_hdr, int shnum, const char *segname,
                                  const char *sectname)
{
    int i;
    struct section *sec = section_hdr;

    for(i = 0; i < shnum; i++, sec++) {
        if (!sec->segname || !sec->sectname)
            continue;
        if (!strcmp(sec->sectname, sectname) && !strcmp(sec->segname, segname))
            return i;
    }
    return -1;
}

/* find a section header given its segname, sectname */
struct section *find_mach_sec_hdr(struct section *section_hdr, int shnum, const char *segname,
                                  const char *sectname)
{
    int index = find_mach_sec_index(section_hdr, shnum, segname, sectname);
	if(index == -1)
		return NULL;
	return section_hdr+index;
}


static inline void fetch_next_pair_value(struct relocation_info * rel, unsigned int *value)
{
    struct scattered_relocation_info * scarel;

    if(R_SCATTERED & rel->r_address) {
        scarel = (struct scattered_relocation_info*)rel;
        if(scarel->r_type != PPC_RELOC_PAIR)
            error("fetch_next_pair_value: looking for a pair which was not found (1)");
        *value = scarel->r_value;
    } else {
		if(rel->r_type != PPC_RELOC_PAIR)
			error("fetch_next_pair_value: looking for a pair which was not found (2)");
		*value = rel->r_address;
	}
}

/* find a sym name given its value, in a section number */
static const char * find_sym_with_value_and_sec_number( int value, int sectnum, int * offset )
{
	int i, ret = -1;

	for( i = 0 ; i < nb_syms; i++ )
	{
	    if( !(symtab[i].n_type & N_STAB) && (symtab[i].n_type & N_SECT) &&
			 (symtab[i].n_sect ==  sectnum) && (symtab[i].st_value <= value) )
		{
			if( (ret<0) || (symtab[i].st_value >= symtab[ret].st_value) )
				ret = i;
		}
	}
	if( ret < 0 ) {
		*offset = 0;
		return 0;
	} else {
		*offset = value - symtab[ret].st_value;
		return get_sym_name(&symtab[ret]);
	}
}

/*
 *  Find symbol name given a (virtual) address, and a section which is of type
 *  S_NON_LAZY_SYMBOL_POINTERS or S_LAZY_SYMBOL_POINTERS or S_SYMBOL_STUBS
 */
static const char * find_reloc_name_in_sec_ptr(int address, struct section * sec_hdr)
{
    unsigned int tocindex, symindex, size;
    const char *name = 0;

    /* Sanity check */
    if(!( address >= sec_hdr->addr && address < (sec_hdr->addr + sec_hdr->size) ) )
        return (char*)0;

	if( sec_hdr->flags & S_SYMBOL_STUBS ){
		size = sec_hdr->reserved2;
		if(size == 0)
		    error("size = 0");

	}
	else if( sec_hdr->flags & S_LAZY_SYMBOL_POINTERS ||
	            sec_hdr->flags & S_NON_LAZY_SYMBOL_POINTERS)
		size = sizeof(unsigned long);
	else
		return 0;

    /* Compute our index in toc */
	tocindex = (address - sec_hdr->addr)/size;
	symindex = tocdylib[sec_hdr->reserved1 + tocindex];

	name = get_sym_name(&symtab[symindex]);

    return name;
}

static const char * find_reloc_name_given_its_address(int address)
{
    unsigned int i;
    for(i = 0; i < segment->nsects ; i++)
    {
        const char * name = find_reloc_name_in_sec_ptr(address, &section_hdr[i]);
        if((long)name != -1)
            return name;
    }
    return 0;
}

static const char * get_reloc_name(EXE_RELOC * rel, int * sslide)
{
	char * name = 0;
	struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel;
	int sectnum = rel->r_symbolnum;
	int sectoffset;
	int other_half=0;

	/* init the slide value */
	*sslide = 0;

	if(R_SCATTERED & rel->r_address)
		return (char *)find_reloc_name_given_its_address(sca_rel->r_value);

	if(rel->r_extern)
	{
		/* ignore debug sym */
		if ( symtab[rel->r_symbolnum].n_type & N_STAB )
			return 0;
		return get_sym_name(&symtab[rel->r_symbolnum]);
	}

	/* Intruction contains an offset to the symbols pointed to, in the rel->r_symbolnum section */
	sectoffset = *(uint32_t *)(text + rel->r_address) & 0xffff;

	if(sectnum==0xffffff)
		return 0;

	/* Sanity Check */
	if(sectnum > segment->nsects)
		error("sectnum > segment->nsects");

	switch(rel->r_type)
	{
		case PPC_RELOC_LO16: fetch_next_pair_value(rel+1, &other_half); sectoffset |= (other_half << 16);
			break;
		case PPC_RELOC_HI16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) | (uint16_t)(other_half & 0xffff);
			break;
		case PPC_RELOC_HA16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset << 16) + (int16_t)(other_half & 0xffff);
			break;
		case PPC_RELOC_BR24:
			sectoffset = ( *(uint32_t *)(text + rel->r_address) & 0x03fffffc );
			if (sectoffset & 0x02000000) sectoffset |= 0xfc000000;
			break;
		default:
			error("switch(rel->type) not found");
	}

	if(rel->r_pcrel)
		sectoffset += rel->r_address;

	if (rel->r_type == PPC_RELOC_BR24)
		name = (char *)find_reloc_name_in_sec_ptr((int)sectoffset, &section_hdr[sectnum-1]);

	/* search it in the full symbol list, if not found */
	if(!name)
		name = (char *)find_sym_with_value_and_sec_number(sectoffset, sectnum, sslide);

	return name;
}

/* Used by dyngen common code */
static const char * get_rel_sym_name(EXE_RELOC * rel)
{
	int sslide;
	return get_reloc_name( rel, &sslide);
}

/* Used by dyngen common code */
static host_ulong get_rel_offset(EXE_RELOC *rel)
{
	struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel;
    if(R_SCATTERED & rel->r_address)
		return sca_rel->r_address;
	else
		return rel->r_address;
}

/* load a mach-o object file */
int load_object(const char *filename)
{
	int fd;
	unsigned int offset_to_segment = 0;
    unsigned int offset_to_dysymtab = 0;
    unsigned int offset_to_symtab = 0;
    struct load_command lc;
    unsigned int i, j;
	EXE_SYM *sym;
	struct nlist *syment;

	fd = open(filename, O_RDONLY);
    if (fd < 0)
        error("can't open file '%s'", filename);

    /* Read Mach header.  */
    if (read(fd, &mach_hdr, sizeof (mach_hdr)) != sizeof (mach_hdr))
        error("unable to read file header");

    /* Check Mach identification.  */
    if (!check_mach_header(mach_hdr)) {
        error("bad Mach header");
    }

    if (mach_hdr.cputype != CPU_TYPE_POWERPC)
        error("Unsupported CPU");

    if (mach_hdr.filetype != MH_OBJECT)
        error("Unsupported Mach Object");

    /* read segment headers */
    for(i=0, j=sizeof(mach_hdr); i<mach_hdr.ncmds ; i++)
    {
        if(read(fd, &lc, sizeof(struct load_command)) != sizeof(struct load_command))
            error("unable to read load_command");
        if(lc.cmd == LC_SEGMENT)
        {
            offset_to_segment = j;
            lseek(fd, offset_to_segment, SEEK_SET);
            segment = malloc(sizeof(struct segment_command));
            if(read(fd, segment, sizeof(struct segment_command)) != sizeof(struct segment_command))
                error("unable to read LC_SEGMENT");
        }
        if(lc.cmd == LC_DYSYMTAB)
        {
            offset_to_dysymtab = j;
            lseek(fd, offset_to_dysymtab, SEEK_SET);
            dysymtabcmd = malloc(sizeof(struct dysymtab_command));
            if(read(fd, dysymtabcmd, sizeof(struct dysymtab_command)) != sizeof(struct dysymtab_command))
                error("unable to read LC_DYSYMTAB");
        }
        if(lc.cmd == LC_SYMTAB)
        {
            offset_to_symtab = j;
            lseek(fd, offset_to_symtab, SEEK_SET);
            symtabcmd = malloc(sizeof(struct symtab_command));
            if(read(fd, symtabcmd, sizeof(struct symtab_command)) != sizeof(struct symtab_command))
                error("unable to read LC_SYMTAB");
        }
        j+=lc.cmdsize;

        lseek(fd, j, SEEK_SET);
    }

    if(!segment)
        error("unable to find LC_SEGMENT");

    /* read section headers */
    section_hdr = load_data(fd, offset_to_segment + sizeof(struct segment_command), segment->nsects * sizeof(struct section));

    /* read all section data */
    sdata = (uint8_t **)malloc(sizeof(void *) * segment->nsects);
    memset(sdata, 0, sizeof(void *) * segment->nsects);

	/* Load the data in section data */
	for(i = 0; i < segment->nsects; i++) {
        sdata[i] = load_data(fd, section_hdr[i].offset, section_hdr[i].size);
    }

    /* text section */
	text_sec_hdr = find_mach_sec_hdr(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT);
	i = find_mach_sec_index(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT);
	if (i == -1 || !text_sec_hdr)
        error("could not find __TEXT,__text section");
    text = sdata[i];

    /* Make sure dysym was loaded */
    if(!(int)dysymtabcmd)
        error("could not find __DYSYMTAB segment");

    /* read the table of content of the indirect sym */
    tocdylib = load_data( fd, dysymtabcmd->indirectsymoff, dysymtabcmd->nindirectsyms * sizeof(uint32_t) );

    /* Make sure symtab was loaded  */
    if(!(int)symtabcmd)
        error("could not find __SYMTAB segment");
    nb_syms = symtabcmd->nsyms;

    symtab_std = load_data(fd, symtabcmd->symoff, symtabcmd->nsyms * sizeof(struct nlist));
    strtab = load_data(fd, symtabcmd->stroff, symtabcmd->strsize);

	symtab = malloc(sizeof(EXE_SYM) * nb_syms);

	/* Now transform the symtab, to an extended version, with the sym size, and the C name */
	for(i = 0, sym = symtab, syment = symtab_std; i < nb_syms; i++, sym++, syment++) {
        struct nlist *sym_follow, *sym_next = 0;
        unsigned int j;
		memset(sym, 0, sizeof(*sym));

		if ( syment->n_type & N_STAB ) /* Debug symbols are skipped */
            continue;

		memcpy(sym, syment, sizeof(*syment));

		/* Find the following symbol in order to get the current symbol size */
        for(j = 0, sym_follow = symtab_std; j < nb_syms; j++, sym_follow++) {
            if ( sym_follow->n_sect != 1 || sym_follow->n_type & N_STAB || !(sym_follow->n_value > sym->st_value))
                continue;
            if(!sym_next) {
                sym_next = sym_follow;
                continue;
            }
            if(!(sym_next->n_value > sym_follow->n_value))
                continue;
            sym_next = sym_follow;
        }
		if(sym_next)
            sym->st_size = sym_next->n_value - sym->st_value;
		else
            sym->st_size = text_sec_hdr->size - sym->st_value;
	}

    /* Find Reloc */
    relocs = load_data(fd, text_sec_hdr->reloff, text_sec_hdr->nreloc * sizeof(struct relocation_info));
    nb_relocs = text_sec_hdr->nreloc;

	close(fd);
	return 0;
}

#endif /* CONFIG_FORMAT_MACH */

void get_reloc_expr(char *name, int name_size, const char *sym_name)
{
    const char *p;

    if (strstart(sym_name, "__op_param", &p)) {
        snprintf(name, name_size, "param%s", p);
    } else if (strstart(sym_name, "__op_gen_label", &p)) {
        snprintf(name, name_size, "gen_labels[param%s]", p);
    } else {
#ifdef HOST_SPARC
        if (sym_name[0] == '.')
            snprintf(name, name_size,
                     "(long)(&__dot_%s)",
                     sym_name + 1);
        else
#endif
            snprintf(name, name_size, "(long)(&%s)", sym_name);
    }
}

#ifdef HOST_IA64

#define PLT_ENTRY_SIZE	16	/* 1 bundle containing "brl" */

struct plt_entry {
    struct plt_entry *next;
    const char *name;
    unsigned long addend;
} *plt_list;

static int
get_plt_index (const char *name, unsigned long addend)
{
    struct plt_entry *plt, *prev= NULL;
    int index = 0;

    /* see if we already have an entry for this target: */
    for (plt = plt_list; plt; ++index, prev = plt, plt = plt->next)
	if (strcmp(plt->name, name) == 0 && plt->addend == addend)
	    return index;

    /* nope; create a new PLT entry: */

    plt = malloc(sizeof(*plt));
    if (!plt) {
	perror("malloc");
	exit(1);
    }
    memset(plt, 0, sizeof(*plt));
    plt->name = strdup(name);
    plt->addend = addend;

    /* append to plt-list: */
    if (prev)
	prev->next = plt;
    else
	plt_list = plt;
    return index;
}

#endif

#ifdef HOST_ARM

int arm_emit_ldr_info(const char *name, unsigned long start_offset,
                      FILE *outfile, uint8_t *p_start, uint8_t *p_end,
                      ELF_RELOC *relocs, int nb_relocs)
{
    uint8_t *p;
    uint32_t insn;
    int offset, min_offset, pc_offset, data_size, spare, max_pool;
    uint8_t data_allocated[1024];
    unsigned int data_index;
    int type;

    memset(data_allocated, 0, sizeof(data_allocated));

    p = p_start;
    min_offset = p_end - p_start;
    spare = 0x7fffffff;
    while (p < p_start + min_offset) {
        insn = get32((uint32_t *)p);
        /* TODO: Armv5e ldrd.  */
        /* TODO: VFP load.  */
        if ((insn & 0x0d5f0000) == 0x051f0000) {
            /* ldr reg, [pc, #im] */
            offset = insn & 0xfff;
            if (!(insn & 0x00800000))
                offset = -offset;
            max_pool = 4096;
            type = 0;
        } else if ((insn & 0x0e5f0f00) == 0x0c1f0100) {
            /* FPA ldf.  */
            offset = (insn & 0xff) << 2;
            if (!(insn & 0x00800000))
                offset = -offset;
            max_pool = 1024;
            type = 1;
        } else if ((insn & 0x0fff0000) == 0x028f0000) {
            /* Some gcc load a doubleword immediate with
               add regN, pc, #imm
               ldmia regN, {regN, regM}
               Hope and pray the compiler never generates somethin like
               add reg, pc, #imm1; ldr reg, [reg, #-imm2]; */
            int r;

            r = (insn & 0xf00) >> 7;
            offset = ((insn & 0xff) >> r) | ((insn & 0xff) << (32 - r));
            max_pool = 1024;
            type = 2;
        } else {
            max_pool = 0;
            type = -1;
        }
        if (type >= 0) {
            /* PC-relative load needs fixing up.  */
            if (spare > max_pool - offset)
                spare = max_pool - offset;
            if ((offset & 3) !=0)
                error("%s:%04x: pc offset must be 32 bit aligned",
                      name, start_offset + p - p_start);
            if (offset < 0)
                error("%s:%04x: Embedded literal value",
                      name, start_offset + p - p_start);
            pc_offset = p - p_start + offset + 8;
            if (pc_offset <= (p - p_start) ||
                pc_offset >= (p_end - p_start))
                error("%s:%04x: pc offset must point inside the function code",
                      name, start_offset + p - p_start);
            if (pc_offset < min_offset)
                min_offset = pc_offset;
            if (outfile) {
                /* The intruction position */
                fprintf(outfile, "    arm_ldr_ptr->ptr = gen_code_ptr + %d;\n",
                        p - p_start);
                /* The position of the constant pool data.  */
                data_index = ((p_end - p_start) - pc_offset) >> 2;
                fprintf(outfile, "    arm_ldr_ptr->data_ptr = arm_data_ptr - %d;\n",
                        data_index);
                fprintf(outfile, "    arm_ldr_ptr->type = %d;\n", type);
                fprintf(outfile, "    arm_ldr_ptr++;\n");
            }
        }
        p += 4;
    }

    /* Copy and relocate the constant pool data.  */
    data_size = (p_end - p_start) - min_offset;
    if (data_size > 0 && outfile) {
        spare += min_offset;
        fprintf(outfile, "    arm_data_ptr -= %d;\n", data_size >> 2);
        fprintf(outfile, "    arm_pool_ptr -= %d;\n", data_size);
        fprintf(outfile, "    if (arm_pool_ptr > gen_code_ptr + %d)\n"
                         "        arm_pool_ptr = gen_code_ptr + %d;\n",
                         spare, spare);

        data_index = 0;
        for (pc_offset = min_offset;
             pc_offset < p_end - p_start;
             pc_offset += 4) {

            ELF_RELOC *rel;
            int i, addend, type;
            const char *sym_name;
            char relname[1024];

            /* data value */
            addend = get32((uint32_t *)(p_start + pc_offset));
            relname[0] = '\0';
            for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
                if (rel->r_offset == (pc_offset + start_offset)) {
                    sym_name = get_rel_sym_name(rel);
                    /* the compiler leave some unnecessary references to the code */
                    get_reloc_expr(relname, sizeof(relname), sym_name);
                    type = ELF32_R_TYPE(rel->r_info);
                    if (type != R_ARM_ABS32)
                        error("%s: unsupported data relocation", name);
                    break;
                }
            }
            fprintf(outfile, "    arm_data_ptr[%d] = 0x%x",
                    data_index, addend);
            if (relname[0] != '\0')
                fprintf(outfile, " + %s", relname);
            fprintf(outfile, ";\n");

            data_index++;
        }
    }

    if (p == p_start)
        goto arm_ret_error;
    p -= 4;
    insn = get32((uint32_t *)p);
    /* The last instruction must be an ldm instruction.  There are several
       forms generated by gcc:
        ldmib sp, {..., pc}  (implies a sp adjustment of +4)
        ldmia sp, {..., pc}
        ldmea fp, {..., pc} */
    if ((insn & 0xffff8000) == 0xe99d8000) {
        if (outfile) {
            fprintf(outfile,
                    "    *(uint32_t *)(gen_code_ptr + %d) = 0xe28dd004;\n",
                    p - p_start);
        }
        p += 4;
    } else if ((insn & 0xffff8000) != 0xe89d8000
        && (insn & 0xffff8000) != 0xe91b8000) {
    arm_ret_error:
        if (!outfile)
            printf("%s: invalid epilog\n", name);
    }
    return p - p_start;
}
#endif


#define MAX_ARGS 3

/* generate op code */
void gen_code(const char *name, host_ulong offset, host_ulong size,
              FILE *outfile, int gen_switch)
{
    int copy_size = 0;
    uint8_t *p_start, *p_end;
    host_ulong start_offset;
    int nb_args, i, n;
    uint8_t args_present[MAX_ARGS];
    const char *sym_name, *p;
    EXE_RELOC *rel;

    /* Compute exact size excluding prologue and epilogue instructions.
     * Increment start_offset to skip epilogue instructions, then compute
     * copy_size the indicate the size of the remaining instructions (in
     * bytes).
     */
    p_start = text + offset;
    p_end = p_start + size;
    start_offset = offset;
#if defined(HOST_I386) || defined(HOST_X86_64)
#ifdef CONFIG_FORMAT_COFF
    {
        uint8_t *p;
        p = p_end - 1;
        if (p == p_start)
            error("empty code for %s", name);
        while (*p != 0xc3) {
            p--;
            if (p <= p_start)
                error("ret or jmp expected at the end of %s", name);
        }
        copy_size = p - p_start;
    }
#else
    {
        int len;
        len = p_end - p_start;
        if (len == 0)
            error("empty code for %s", name);
        if (p_end[-1] == 0xc3) {
            len--;
        } else {
            error("ret or jmp expected at the end of %s", name);
        }
        copy_size = len;
    }
#endif
#elif defined(HOST_PPC)
    {
        uint8_t *p;
        p = (void *)(p_end - 4);
        if (p == p_start)
            error("empty code for %s", name);
        if (get32((uint32_t *)p) != 0x4e800020)
            error("blr expected at the end of %s", name);
        copy_size = p - p_start;
    }
#elif defined(HOST_S390)
    {
        uint8_t *p;
        p = (void *)(p_end - 2);
        if (p == p_start)
            error("empty code for %s", name);
        if ((get16((uint16_t *)p) & 0xfff0) != 0x07f0)
            error("br expected at the end of %s", name);
        copy_size = p - p_start;
    }
#elif defined(HOST_ALPHA)
    {
        uint8_t *p;
        p = p_end - 4;
#if 0
        /* XXX: check why it occurs */
        if (p == p_start)
            error("empty code for %s", name);
#endif
        if (get32((uint32_t *)p) != 0x6bfa8001)
            error("ret expected at the end of %s", name);
        copy_size = p - p_start;
    }
#elif defined(HOST_IA64)
    {
        uint8_t *p;
        p = (void *)(p_end - 4);
        if (p == p_start)
            error("empty code for %s", name);
        /* br.ret.sptk.many b0;; */
        /* 08 00 84 00 */
        if (get32((uint32_t *)p) != 0x00840008)
            error("br.ret.sptk.many b0;; expected at the end of %s", name);
	copy_size = p_end - p_start;
    }
#elif defined(HOST_SPARC)
    {
#define INSN_SAVE       0x9de3a000
#define INSN_RET        0x81c7e008
#define INSN_RETL       0x81c3e008
#define INSN_RESTORE    0x81e80000
#define INSN_RETURN     0x81cfe008
#define INSN_NOP        0x01000000
#define INSN_ADD_SP     0x9c03a000 // add %sp, nn, %sp
#define INSN_SUB_SP     0x9c23a000 // sub %sp, nn, %sp

        uint32_t start_insn, end_insn1, end_insn2;
        uint8_t *p;
        p = (void *)(p_end - 8);
        if (p <= p_start)
            error("empty code for %s", name);
        start_insn = get32((uint32_t *)(p_start + 0x0));
        end_insn1 = get32((uint32_t *)(p + 0x0));
        end_insn2 = get32((uint32_t *)(p + 0x4));
        if (((start_insn & ~0x1fff) == INSN_SAVE) ||
            (start_insn & ~0x1fff) == INSN_ADD_SP) {
            p_start += 0x4;
            start_offset += 0x4;
            if (end_insn1 == INSN_RET && end_insn2 == INSN_RESTORE)
                /* SPARC v7: ret; restore; */ ;
            else if (end_insn1 == INSN_RETURN && end_insn2 == INSN_NOP)
                /* SPARC v9: return; nop; */ ;
            else if (end_insn1 == INSN_RETL && (end_insn2 & ~0x1fff) == INSN_SUB_SP)
                /* SPARC v7: retl; sub %sp, nn, %sp; */ ;
            else

                error("ret; restore; not found at end of %s", name);
        } else if (end_insn1 == INSN_RETL && end_insn2 == INSN_NOP) {
            ;
        } else {
            error("No save at the beginning of %s", name);
        }
#if 0
        /* Skip a preceeding nop, if present.  */
        if (p > p_start) {
            skip_insn = get32((uint32_t *)(p - 0x4));
            if (skip_insn == INSN_NOP)
                p -= 4;
        }
#endif
        copy_size = p - p_start;
    }
#elif defined(HOST_SPARC64)
    {
#define INSN_SAVE       0x9de3a000
#define INSN_RET        0x81c7e008
#define INSN_RETL       0x81c3e008
#define INSN_RESTORE    0x81e80000
#define INSN_RETURN     0x81cfe008
#define INSN_NOP        0x01000000
#define INSN_ADD_SP     0x9c03a000 // add %sp, nn, %sp
#define INSN_SUB_SP     0x9c23a000 // sub %sp, nn, %sp

        uint32_t start_insn, end_insn1, end_insn2, skip_insn;
        uint8_t *p;
        p = (void *)(p_end - 8);
#if 0
        /* XXX: check why it occurs */
        if (p <= p_start)
            error("empty code for %s", name);
#endif
        start_insn = get32((uint32_t *)(p_start + 0x0));
        end_insn1 = get32((uint32_t *)(p + 0x0));
        end_insn2 = get32((uint32_t *)(p + 0x4));
        if (((start_insn & ~0x1fff) == INSN_SAVE) ||
            (start_insn & ~0x1fff) == INSN_ADD_SP) {
            p_start += 0x4;
            start_offset += 0x4;
            if (end_insn1 == INSN_RET && end_insn2 == INSN_RESTORE)
                /* SPARC v7: ret; restore; */ ;
            else if (end_insn1 == INSN_RETURN && end_insn2 == INSN_NOP)
                /* SPARC v9: return; nop; */ ;
            else if (end_insn1 == INSN_RETL && (end_insn2 & ~0x1fff) == INSN_SUB_SP)
                /* SPARC v7: retl; sub %sp, nn, %sp; */ ;
            else

                error("ret; restore; not found at end of %s", name);
        } else if (end_insn1 == INSN_RETL && end_insn2 == INSN_NOP) {
            ;
        } else {
            error("No save at the beginning of %s", name);
        }

        /* Skip a preceeding nop, if present.  */
        if (p > p_start) {
            skip_insn = get32((uint32_t *)(p - 0x4));
            if (skip_insn == 0x01000000)
                p -= 4;
        }

        copy_size = p - p_start;
    }
#elif defined(HOST_ARM)
    {
        uint32_t insn;

        if ((p_end - p_start) <= 16)
            error("%s: function too small", name);
        if (get32((uint32_t *)p_start) != 0xe1a0c00d ||
            (get32((uint32_t *)(p_start + 4)) & 0xffff0000) != 0xe92d0000 ||
            get32((uint32_t *)(p_start + 8)) != 0xe24cb004)
            error("%s: invalid prolog", name);
        p_start += 12;
        start_offset += 12;
        insn = get32((uint32_t *)p_start);
        if ((insn & 0xffffff00) == 0xe24dd000) {
            /* Stack adjustment.  Assume op uses the frame pointer.  */
            p_start -= 4;
            start_offset -= 4;
        }
        copy_size = arm_emit_ldr_info(name, start_offset, NULL, p_start, p_end,
                                      relocs, nb_relocs);
    }
#elif defined(HOST_M68K)
    {
        uint8_t *p;
        p = (void *)(p_end - 2);
        if (p == p_start)
            error("empty code for %s", name);
        // remove NOP's, probably added for alignment
        while ((get16((uint16_t *)p) == 0x4e71) &&
               (p>p_start))
            p -= 2;
        if (get16((uint16_t *)p) != 0x4e75)
            error("rts expected at the end of %s", name);
        copy_size = p - p_start;
    }
#elif defined(HOST_MIPS) || defined(HOST_MIPS64)
    {
#define INSN_RETURN     0x03e00008
#define INSN_NOP        0x00000000

        uint8_t *p = p_end;

        if (p < (p_start + 0x8)) {
            error("empty code for %s", name);
        } else {
            uint32_t end_insn1, end_insn2;

            p -= 0x8;
            end_insn1 = get32((uint32_t *)(p + 0x0));
            end_insn2 = get32((uint32_t *)(p + 0x4));
            if (end_insn1 != INSN_RETURN && end_insn2 != INSN_NOP)
                error("jr ra not found at end of %s", name);
        }
        copy_size = p - p_start;
    }
#else
#error unsupported CPU
#endif

    /* compute the number of arguments by looking at the relocations */
    for(i = 0;i < MAX_ARGS; i++)
        args_present[i] = 0;

    for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
        host_ulong offset = get_rel_offset(rel);
        if (offset >= start_offset &&
	    offset < start_offset + (p_end - p_start)) {
            sym_name = get_rel_sym_name(rel);
            if(!sym_name)
                continue;
            if (strstart(sym_name, "__op_param", &p) ||
                strstart(sym_name, "__op_gen_label", &p)) {
                n = strtoul(p, NULL, 10);
                if (n > MAX_ARGS)
                    error("too many arguments in %s", name);
                args_present[n - 1] = 1;
            }
        }
    }

    nb_args = 0;
    while (nb_args < MAX_ARGS && args_present[nb_args])
        nb_args++;
    for(i = nb_args; i < MAX_ARGS; i++) {
        if (args_present[i])
            error("inconsistent argument numbering in %s", name);
    }

    if (gen_switch == 2) {
        fprintf(outfile, "DEF(%s, %d, %d)\n", name + 3, nb_args, copy_size);
    } else if (gen_switch == 1) {

        /* output C code */
        fprintf(outfile, "case INDEX_%s: {\n", name);
        if (nb_args > 0) {
            fprintf(outfile, "    long ");
            for(i = 0; i < nb_args; i++) {
                if (i != 0)
                    fprintf(outfile, ", ");
                fprintf(outfile, "param%d", i + 1);
            }
            fprintf(outfile, ";\n");
        }
#if defined(HOST_IA64)
        fprintf(outfile, "    extern char %s;\n", name);
#else
        fprintf(outfile, "    extern void %s();\n", name);
#endif

        for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
            host_ulong offset = get_rel_offset(rel);
            if (offset >= start_offset &&
                offset < start_offset + (p_end - p_start)) {
                sym_name = get_rel_sym_name(rel);
                if(!sym_name)
                    continue;
                if (*sym_name &&
                    !strstart(sym_name, "__op_param", NULL) &&
                    !strstart(sym_name, "__op_jmp", NULL) &&
                    !strstart(sym_name, "__op_gen_label", NULL)) {
#if defined(HOST_SPARC)
		    if (sym_name[0] == '.') {
			fprintf(outfile,
				"extern char __dot_%s __asm__(\"%s\");\n",
				sym_name+1, sym_name);
			continue;
		    }
#endif
#if defined(__APPLE__)
                    /* Set __attribute((unused)) on darwin because we
                       want to avoid warning when we don't use the symbol.  */
                    fprintf(outfile, "    extern char %s __attribute__((unused));\n", sym_name);
#elif defined(HOST_IA64)
			if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
				/*
				 * PCREL21 br.call targets generally
				 * are out of range and need to go
				 * through an "import stub".
				 */
				fprintf(outfile, "    extern char %s;\n",
					sym_name);
#else
                    fprintf(outfile, "extern char %s;\n", sym_name);
#endif
                }
            }
        }

        fprintf(outfile, "    memcpy(gen_code_ptr, (void *)((char *)&%s+%d), %d);\n",
					name, (int)(start_offset - offset), copy_size);

        /* emit code offset information */
        {
            EXE_SYM *sym;
            const char *sym_name, *p;
            host_ulong val;
            int n;

            for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
                sym_name = get_sym_name(sym);
                if (strstart(sym_name, "__op_label", &p)) {
                    uint8_t *ptr;
                    unsigned long offset;

                    /* test if the variable refers to a label inside
                       the code we are generating */
#ifdef CONFIG_FORMAT_COFF
                    if (sym->st_shndx == text_shndx) {
                        ptr = sdata[coff_text_shndx];
                    } else if (sym->st_shndx == data_shndx) {
                        ptr = sdata[coff_data_shndx];
                    } else {
                        ptr = NULL;
                    }
#elif defined(CONFIG_FORMAT_MACH)
                    if(!sym->n_sect)
                        continue;
                    ptr = sdata[sym->n_sect-1];
#else
                    ptr = sdata[sym->st_shndx];
#endif
                    if (!ptr)
                        error("__op_labelN in invalid section");
                    offset = sym->st_value;
#ifdef CONFIG_FORMAT_MACH
                    offset -= section_hdr[sym->n_sect-1].addr;
#endif
                    val = *(host_ulong *)(ptr + offset);
#ifdef ELF_USES_RELOCA
                    {
                        int reloc_shndx, nb_relocs1, j;

                        /* try to find a matching relocation */
                        reloc_shndx = find_reloc(sym->st_shndx);
                        if (reloc_shndx) {
                            nb_relocs1 = shdr[reloc_shndx].sh_size /
                                shdr[reloc_shndx].sh_entsize;
                            rel = (ELF_RELOC *)sdata[reloc_shndx];
                            for(j = 0; j < nb_relocs1; j++) {
                                if (rel->r_offset == offset) {
				    val = rel->r_addend;
                                    break;
                                }
				rel++;
                            }
                        }
                    }
#endif
                    if (val >= start_offset && val <= start_offset + copy_size) {
                        n = strtol(p, NULL, 10);
                        fprintf(outfile, "    label_offsets[%d] = %ld + (gen_code_ptr - gen_code_buf);\n", n, (long)(val - start_offset));
                    }
                }
            }
        }

        /* load parameters in variables */
        for(i = 0; i < nb_args; i++) {
            fprintf(outfile, "    param%d = *opparam_ptr++;\n", i + 1);
        }

        /* patch relocations */
#if defined(HOST_I386)
            {
                char relname[256];
                int type;
                int addend;
                int reloc_offset;
                for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
                if (rel->r_offset >= start_offset &&
		    rel->r_offset < start_offset + copy_size) {
                    sym_name = get_rel_sym_name(rel);
                    if (!sym_name)
                        continue;
                    reloc_offset = rel->r_offset - start_offset;
                    if (strstart(sym_name, "__op_jmp", &p)) {
                        int n;
                        n = strtol(p, NULL, 10);
                        /* __op_jmp relocations are done at
                           runtime to do translated block
                           chaining: the offset of the instruction
                           needs to be stored */
                        fprintf(outfile, "    jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
                                n, reloc_offset);
                        continue;
                    }

                    get_reloc_expr(relname, sizeof(relname), sym_name);
                    addend = get32((uint32_t *)(text + rel->r_offset));
#ifdef CONFIG_FORMAT_ELF
                    type = ELF32_R_TYPE(rel->r_info);
                    switch(type) {
                    case R_386_32:
                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
                                reloc_offset, relname, addend);
                        break;
                    case R_386_PC32:
                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
                                reloc_offset, relname, reloc_offset, addend);
                        break;
                    default:
                        error("unsupported i386 relocation (%d)", type);
                    }
#elif defined(CONFIG_FORMAT_COFF)
                    {
                        char *temp_name;
                        int j;
                        EXE_SYM *sym;
                        temp_name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx));
                        if (!strcmp(temp_name, ".data")) {
                            for (j = 0, sym = symtab; j < nb_syms; j++, sym++) {
                                if (strstart(sym->st_name, sym_name, NULL)) {
                                    addend -= sym->st_value;
                                }
                            }
                        }
                    }
                    type = rel->r_type;
                    switch(type) {
                    case DIR32:
                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
                                reloc_offset, relname, addend);
                        break;
                    case DISP32:
                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d -4;\n",
                                reloc_offset, relname, reloc_offset, addend);
                        break;
                    default:
                        error("unsupported i386 relocation (%d)", type);
                    }
#else
#error unsupport object format
#endif
                }
                }
            }
#elif defined(HOST_X86_64)
            {
                char relname[256];
                int type;
                int addend;
                int reloc_offset;
                for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
                if (rel->r_offset >= start_offset &&
		    rel->r_offset < start_offset + copy_size) {
                    sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
                    get_reloc_expr(relname, sizeof(relname), sym_name);
                    type = ELF32_R_TYPE(rel->r_info);
                    addend = rel->r_addend;
                    reloc_offset = rel->r_offset - start_offset;
                    switch(type) {
                    case R_X86_64_32:
                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (uint32_t)%s + %d;\n",
                                reloc_offset, relname, addend);
                        break;
                    case R_X86_64_32S:
                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (int32_t)%s + %d;\n",
                                reloc_offset, relname, addend);
                        break;
                    case R_X86_64_PC32:
                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
                                reloc_offset, relname, reloc_offset, addend);
                        break;
                    default:
                        error("unsupported X86_64 relocation (%d)", type);
                    }
                }
                }
            }
#elif defined(HOST_PPC)
            {
#ifdef CONFIG_FORMAT_ELF
                char relname[256];
                int type;
                int addend;
                int reloc_offset;
                for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
                    if (rel->r_offset >= start_offset &&
			rel->r_offset < start_offset + copy_size) {
                        sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
                        reloc_offset = rel->r_offset - start_offset;
                        if (strstart(sym_name, "__op_jmp", &p)) {
                            int n;
                            n = strtol(p, NULL, 10);
                            /* __op_jmp relocations are done at
                               runtime to do translated block
                               chaining: the offset of the instruction
                               needs to be stored */
                            fprintf(outfile, "    jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
                                    n, reloc_offset);
                            continue;
                        }

                        get_reloc_expr(relname, sizeof(relname), sym_name);
                        type = ELF32_R_TYPE(rel->r_info);
                        addend = rel->r_addend;
                        switch(type) {
                        case R_PPC_ADDR32:
                            fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
                                    reloc_offset, relname, addend);
                            break;
                        case R_PPC_ADDR16_LO:
                            fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d) = (%s + %d);\n",
                                    reloc_offset, relname, addend);
                            break;
                        case R_PPC_ADDR16_HI:
                            fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16;\n",
                                    reloc_offset, relname, addend);
                            break;
                        case R_PPC_ADDR16_HA:
                            fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16;\n",
                                    reloc_offset, relname, addend);
                            break;
                        case R_PPC_REL24:
                            /* warning: must be at 32 MB distancy */
                            fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((%s - (long)(gen_code_ptr + %d) + %d) & 0x03fffffc);\n",
                                    reloc_offset, reloc_offset, relname, reloc_offset, addend);
                            break;
                        default:
                            error("unsupported powerpc relocation (%d)", type);
                        }
                    }
                }
#elif defined(CONFIG_FORMAT_MACH)
                struct scattered_relocation_info *scarel;
                struct relocation_info * rel;
                char final_sym_name[256];
                const char *sym_name;
                const char *p;
                int slide, sslide;
                int i;

                for(i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
                    unsigned int offset, length, value = 0;
                    unsigned int type, pcrel, isym = 0;
                    unsigned int usesym = 0;

                    if(R_SCATTERED & rel->r_address) {
                        scarel = (struct scattered_relocation_info*)rel;
                        offset = (unsigned int)scarel->r_address;
                        length = scarel->r_length;
                        pcrel = scarel->r_pcrel;
                        type = scarel->r_type;
                        value = scarel->r_value;
                    } else {
                        value = isym = rel->r_symbolnum;
                        usesym = (rel->r_extern);
                        offset = rel->r_address;
                        length = rel->r_length;
                        pcrel = rel->r_pcrel;
                        type = rel->r_type;
                    }

                    slide = offset - start_offset;

                    if (!(offset >= start_offset && offset < start_offset + size))
                        continue;  /* not in our range */

                        sym_name = get_reloc_name(rel, &sslide);

                        if(usesym && symtab[isym].n_type & N_STAB)
                            continue; /* don't handle STAB (debug sym) */

                        if (sym_name && strstart(sym_name, "__op_jmp", &p)) {
                            int n;
                            n = strtol(p, NULL, 10);
                            fprintf(outfile, "    jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
                                    n, slide);
                            continue; /* Nothing more to do */
                        }

                        if(!sym_name) {
                            fprintf(outfile, "/* #warning relocation not handled in %s (value 0x%x, %s, offset 0x%x, length 0x%x, %s, type 0x%x) */\n",
                                    name, value, usesym ? "use sym" : "don't use sym", offset, length, pcrel ? "pcrel":"", type);
                            continue; /* dunno how to handle without final_sym_name */
                        }

                        get_reloc_expr(final_sym_name, sizeof(final_sym_name),
                                       sym_name);
                        switch(type) {
                        case PPC_RELOC_BR24:
                            if (!strstart(sym_name,"__op_gen_label",&p)) {
                                fprintf(outfile, "{\n");
                                fprintf(outfile, "    uint32_t imm = *(uint32_t *)(gen_code_ptr + %d) & 0x3fffffc;\n", slide);
                                fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((imm + ((long)%s - (long)gen_code_ptr) + %d) & 0x03fffffc);\n",
                                        slide, slide, name, sslide);
                                fprintf(outfile, "}\n");
                            } else {
                                fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | (((long)%s - (long)gen_code_ptr - %d) & 0x03fffffc);\n",
                                        slide, slide, final_sym_name, slide);
                            }
                            break;
                        case PPC_RELOC_HI16:
                            fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d) >> 16;\n",
                                    slide, final_sym_name, sslide);
                            break;
                        case PPC_RELOC_LO16:
                            fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d);\n",
                                    slide, final_sym_name, sslide);
                            break;
                        case PPC_RELOC_HA16:
                            fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d + 0x8000) >> 16;\n",
                                    slide, final_sym_name, sslide);
                            break;
                        default:
                            error("unsupported powerpc relocation (%d)", type);
                    }
                }
#else
#error unsupport object format
#endif
            }
#elif defined(HOST_S390)
            {
                char relname[256];
                int type;
                int addend;
                int reloc_offset;
                for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
                    if (rel->r_offset >= start_offset &&
			rel->r_offset < start_offset + copy_size) {
                        sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
                        get_reloc_expr(relname, sizeof(relname), sym_name);
                        type = ELF32_R_TYPE(rel->r_info);
                        addend = rel->r_addend;
                        reloc_offset = rel->r_offset - start_offset;
                        switch(type) {
                        case R_390_32:
                            fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
                                    reloc_offset, relname, addend);
                            break;
                        case R_390_16:
                            fprintf(outfile, "    *(uint16_t *)(gen_code_ptr + %d) = %s + %d;\n",
                                    reloc_offset, relname, addend);
                            break;
                        case R_390_8:
                            fprintf(outfile, "    *(uint8_t *)(gen_code_ptr + %d) = %s + %d;\n",
                                    reloc_offset, relname, addend);
                            break;
                        case R_390_PC32DBL:
                            if (ELF32_ST_TYPE(symtab[ELFW(R_SYM)(rel->r_info)].st_info) == STT_SECTION) {
                                fprintf(outfile,
                                        "    *(uint32_t *)(gen_code_ptr + %d) += "
                                        "((long)&%s - (long)gen_code_ptr) >> 1;\n",
                                        reloc_offset, name);
                            }
                            else
                                fprintf(outfile,
                                        "    *(uint32_t *)(gen_code_ptr + %d) = "
                                        "(%s + %d - ((uint32_t)gen_code_ptr + %d)) >> 1;\n",
                                        reloc_offset, relname, addend, reloc_offset);
                            break;
                        default:
                            error("unsupported s390 relocation (%d)", type);
                        }
                    }
                }
            }
#elif defined(HOST_ALPHA)
            {
                for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
		    if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
			int type;
                        long reloc_offset;

			type = ELF64_R_TYPE(rel->r_info);
			sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
                        reloc_offset = rel->r_offset - start_offset;
			switch (type) {
			case R_ALPHA_GPDISP:
			    /* The gp is just 32 bit, and never changes, so it's easiest to emit it
			       as an immediate instead of constructing it from the pv or ra.  */
			    fprintf(outfile, "    immediate_ldah(gen_code_ptr + %ld, gp);\n",
				    reloc_offset);
			    fprintf(outfile, "    immediate_lda(gen_code_ptr + %ld, gp);\n",
				    reloc_offset + (int)rel->r_addend);
			    break;
			case R_ALPHA_LITUSE:
			    /* jsr to literal hint. Could be used to optimize to bsr. Ignore for
			       now, since some called functions (libc) need pv to be set up.  */
			    break;
			case R_ALPHA_HINT:
			    /* Branch target prediction hint. Ignore for now.  Should be already
			       correct for in-function jumps.  */
			    break;
			case R_ALPHA_LITERAL:
			    /* Load a literal from the GOT relative to the gp.  Since there's only a
			       single gp, nothing is to be done.  */
			    break;
			case R_ALPHA_GPRELHIGH:
			    /* Handle fake relocations against __op_param symbol.  Need to emit the
			       high part of the immediate value instead.  Other symbols need no
			       special treatment.  */
			    if (strstart(sym_name, "__op_param", &p))
				fprintf(outfile, "    immediate_ldah(gen_code_ptr + %ld, param%s);\n",
					reloc_offset, p);
			    break;
			case R_ALPHA_GPRELLOW:
			    if (strstart(sym_name, "__op_param", &p))
				fprintf(outfile, "    immediate_lda(gen_code_ptr + %ld, param%s);\n",
					reloc_offset, p);
			    break;
			case R_ALPHA_BRSGP:
			    /* PC-relative jump. Tweak offset to skip the two instructions that try to
			       set up the gp from the pv.  */
			    fprintf(outfile, "    fix_bsr(gen_code_ptr + %ld, (uint8_t *) &%s - (gen_code_ptr + %ld + 4) + 8);\n",
				    reloc_offset, sym_name, reloc_offset);
			    break;
			default:
			    error("unsupported Alpha relocation (%d)", type);
			}
		    }
                }
            }
#elif defined(HOST_IA64)
            {
		unsigned long sym_idx;
		long code_offset;
                char relname[256];
                int type;
                long addend;

                for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
		    sym_idx = ELF64_R_SYM(rel->r_info);
                    if (rel->r_offset < start_offset
			|| rel->r_offset >= start_offset + copy_size)
			continue;
		    sym_name = (strtab + symtab[sym_idx].st_name);
		    code_offset = rel->r_offset - start_offset;
		    if (strstart(sym_name, "__op_jmp", &p)) {
			int n;
			n = strtol(p, NULL, 10);
			/* __op_jmp relocations are done at
			   runtime to do translated block
			   chaining: the offset of the instruction
			   needs to be stored */
			fprintf(outfile, "    jmp_offsets[%d] ="
				"%ld + (gen_code_ptr - gen_code_buf);\n",
				n, code_offset);
			continue;
		    }
		    get_reloc_expr(relname, sizeof(relname), sym_name);
		    type = ELF64_R_TYPE(rel->r_info);
		    addend = rel->r_addend;
		    switch(type) {
		      case R_IA64_IMM64:
			  fprintf(outfile,
				  "    ia64_imm64(gen_code_ptr + %ld, "
				  "%s + %ld);\n",
				  code_offset, relname, addend);
			  break;
		      case R_IA64_LTOFF22X:
		      case R_IA64_LTOFF22:
			  fprintf(outfile, "    IA64_LTOFF(gen_code_ptr + %ld,"
				  " %s + %ld, %d);\n",
				  code_offset, relname, addend,
				  (type == R_IA64_LTOFF22X));
			  break;
		      case R_IA64_LDXMOV:
			  fprintf(outfile,
				  "    ia64_ldxmov(gen_code_ptr + %ld,"
				  " %s + %ld);\n", code_offset, relname, addend);
			  break;

		      case R_IA64_PCREL21B:
			  if (strstart(sym_name, "__op_gen_label", NULL)) {
			      fprintf(outfile,
				      "    ia64_imm21b(gen_code_ptr + %ld,"
				      " (long) (%s + %ld -\n\t\t"
				      "((long) gen_code_ptr + %ld)) >> 4);\n",
				      code_offset, relname, addend,
				      code_offset & ~0xfUL);
			  } else {
			      fprintf(outfile,
				      "    IA64_PLT(gen_code_ptr + %ld, "
				      "%d);\t/* %s + %ld */\n",
				      code_offset,
				      get_plt_index(sym_name, addend),
				      sym_name, addend);
			  }
			  break;
		      default:
			  error("unsupported ia64 relocation (0x%x)",
				type);
		    }
                }
		fprintf(outfile, "    ia64_nop_b(gen_code_ptr + %d);\n",
			copy_size - 16 + 2);
            }
#elif defined(HOST_SPARC)
            {
                char relname[256];
                int type;
                int addend;
                int reloc_offset;
                for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
                    if (rel->r_offset >= start_offset &&
			rel->r_offset < start_offset + copy_size) {
                        sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name;
                        get_reloc_expr(relname, sizeof(relname), sym_name);
                        type = ELF32_R_TYPE(rel->r_info);
                        addend = rel->r_addend;
                        reloc_offset = rel->r_offset - start_offset;
                        switch(type) {
                        case R_SPARC_32:
                            fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
                                    reloc_offset, relname, addend);
			    break;
			case R_SPARC_HI22:
                            fprintf(outfile,
				    "    *(uint32_t *)(gen_code_ptr + %d) = "
				    "((*(uint32_t *)(gen_code_ptr + %d)) "
				    " & ~0x3fffff) "
				    " | (((%s + %d) >> 10) & 0x3fffff);\n",
                                    reloc_offset, reloc_offset, relname, addend);
			    break;
			case R_SPARC_LO10:
                            fprintf(outfile,
				    "    *(uint32_t *)(gen_code_ptr + %d) = "
				    "((*(uint32_t *)(gen_code_ptr + %d)) "
				    " & ~0x3ff) "
				    " | ((%s + %d) & 0x3ff);\n",
                                    reloc_offset, reloc_offset, relname, addend);
			    break;
			case R_SPARC_WDISP30:
			    fprintf(outfile,
				    "    *(uint32_t *)(gen_code_ptr + %d) = "
				    "((*(uint32_t *)(gen_code_ptr + %d)) "
				    " & ~0x3fffffff) "
				    " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
				    "    & 0x3fffffff);\n",
				    reloc_offset, reloc_offset, relname, addend,
				    reloc_offset);
			    break;
                        case R_SPARC_WDISP22:
                            fprintf(outfile,
                                    "    *(uint32_t *)(gen_code_ptr + %d) = "
                                    "((*(uint32_t *)(gen_code_ptr + %d)) "
                                    " & ~0x3fffff) "
                                    " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
                                    "    & 0x3fffff);\n",
                                    rel->r_offset - start_offset,
                                    rel->r_offset - start_offset,
                                    relname, addend,
                                    rel->r_offset - start_offset);
                            break;
                        default:
                            error("unsupported sparc relocation (%d)", type);
                        }
                    }
                }
            }
#elif defined(HOST_SPARC64)
            {
                char relname[256];
                int type;
                int addend;
                int reloc_offset;
                for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
                    if (rel->r_offset >= start_offset &&
			rel->r_offset < start_offset + copy_size) {
                        sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
                        get_reloc_expr(relname, sizeof(relname), sym_name);
                        type = ELF32_R_TYPE(rel->r_info);
                        addend = rel->r_addend;
                        reloc_offset = rel->r_offset - start_offset;
                        switch(type) {
                        case R_SPARC_32:
                            fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
                                    reloc_offset, relname, addend);
			    break;
			case R_SPARC_HI22:
                            fprintf(outfile,
				    "    *(uint32_t *)(gen_code_ptr + %d) = "
				    "((*(uint32_t *)(gen_code_ptr + %d)) "
				    " & ~0x3fffff) "
				    " | (((%s + %d) >> 10) & 0x3fffff);\n",
                                    reloc_offset, reloc_offset, relname, addend);
			    break;
			case R_SPARC_LO10:
                            fprintf(outfile,
				    "    *(uint32_t *)(gen_code_ptr + %d) = "
				    "((*(uint32_t *)(gen_code_ptr + %d)) "
				    " & ~0x3ff) "
				    " | ((%s + %d) & 0x3ff);\n",
                                    reloc_offset, reloc_offset, relname, addend);
			    break;
                        case R_SPARC_OLO10:
                            addend += ELF64_R_TYPE_DATA (rel->r_info);
                            fprintf(outfile,
				    "    *(uint32_t *)(gen_code_ptr + %d) = "
				    "((*(uint32_t *)(gen_code_ptr + %d)) "
				    " & ~0x3ff) "
				    " | ((%s + %d) & 0x3ff);\n",
                                    reloc_offset, reloc_offset, relname, addend);
			    break;
			case R_SPARC_WDISP30:
			    fprintf(outfile,
				    "    *(uint32_t *)(gen_code_ptr + %d) = "
				    "((*(uint32_t *)(gen_code_ptr + %d)) "
				    " & ~0x3fffffff) "
				    " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
				    "    & 0x3fffffff);\n",
				    reloc_offset, reloc_offset, relname, addend,
				    reloc_offset);
			    break;
                        case R_SPARC_WDISP22:
                            fprintf(outfile,
                                    "    *(uint32_t *)(gen_code_ptr + %d) = "
                                    "((*(uint32_t *)(gen_code_ptr + %d)) "
                                    " & ~0x3fffff) "
                                    " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
                                    "    & 0x3fffff);\n",
                                    reloc_offset, reloc_offset, relname, addend,
				    reloc_offset);
                            break;
                        case R_SPARC_HH22:
                            fprintf(outfile,
				    "    *(uint32_t *)(gen_code_ptr + %d) = "
				    "((*(uint32_t *)(gen_code_ptr + %d)) "
				    " & ~0x00000000) "
				    " | (((%s + %d) >> 42) & 0x00000000);\n",
                                    reloc_offset, reloc_offset, relname, addend);
                             break;

			case R_SPARC_LM22:
                            fprintf(outfile,
				    "    *(uint32_t *)(gen_code_ptr + %d) = "
				    "((*(uint32_t *)(gen_code_ptr + %d)) "
				    " & ~0x00000000) "
				    " | (((%s + %d) >> 10) & 0x00000000);\n",
                                    reloc_offset, reloc_offset, relname, addend);
			    break;

			case R_SPARC_HM10:
                            fprintf(outfile,
				    "    *(uint32_t *)(gen_code_ptr + %d) = "
				    "((*(uint32_t *)(gen_code_ptr + %d)) "
				    " & ~0x00000000) "
				    " | ((((%s + %d) >> 32 & 0x3ff)) & 0x00000000);\n",
                                    reloc_offset, reloc_offset, relname, addend);
			    break;

                        default:
			    error("unsupported sparc64 relocation (%d) for symbol %s", type, relname);
                        }
                    }
                }
            }
#elif defined(HOST_ARM)
            {
                char relname[256];
                int type;
                int addend;
                int reloc_offset;
                uint32_t insn;

                insn = get32((uint32_t *)(p_start + 4));
                /* If prologue ends in sub sp, sp, #const then assume
                   op has a stack frame and needs the frame pointer.  */
                if ((insn & 0xffffff00) == 0xe24dd000) {
                    int i;
                    uint32_t opcode;
                    opcode = 0xe28db000; /* add fp, sp, #0.  */
#if 0
/* ??? Need to undo the extra stack adjustment at the end of the op.
   For now just leave the stack misaligned and hope it doesn't break anything
   too important.  */
                    if ((insn & 4) != 0) {
                        /* Preserve doubleword stack alignment.  */
                        fprintf(outfile,
                                "    *(uint32_t *)(gen_code_ptr + 4)= 0x%x;\n",
                                insn + 4);
                        opcode -= 4;
                    }
#endif
                    insn = get32((uint32_t *)(p_start - 4));
                    /* Calculate the size of the saved registers,
                       excluding pc.  */
                    for (i = 0; i < 15; i++) {
                        if (insn & (1 << i))
                            opcode += 4;
                    }
                    fprintf(outfile,
                            "    *(uint32_t *)gen_code_ptr = 0x%x;\n", opcode);
                }
                arm_emit_ldr_info(relname, start_offset, outfile, p_start, p_end,
                                  relocs, nb_relocs);

                for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
                if (rel->r_offset >= start_offset &&
		    rel->r_offset < start_offset + copy_size) {
                    sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
                    /* the compiler leave some unnecessary references to the code */
                    if (sym_name[0] == '\0')
                        continue;
                    get_reloc_expr(relname, sizeof(relname), sym_name);
                    type = ELF32_R_TYPE(rel->r_info);
                    addend = get32((uint32_t *)(text + rel->r_offset));
                    reloc_offset = rel->r_offset - start_offset;
                    switch(type) {
                    case R_ARM_ABS32:
                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
                                reloc_offset, relname, addend);
                        break;
                    case R_ARM_PC24:
                    case R_ARM_JUMP24:
                    case R_ARM_CALL:
                        fprintf(outfile, "    arm_reloc_pc24((uint32_t *)(gen_code_ptr + %d), 0x%x, %s);\n",
                                reloc_offset, addend, relname);
                        break;
                    default:
                        error("unsupported arm relocation (%d)", type);
                    }
                }
                }
            }
#elif defined(HOST_M68K)
            {
                char relname[256];
                int type;
                int addend;
                int reloc_offset;
		Elf32_Sym *sym;
                for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
                if (rel->r_offset >= start_offset &&
		    rel->r_offset < start_offset + copy_size) {
		    sym = &(symtab[ELFW(R_SYM)(rel->r_info)]);
                    sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
                    get_reloc_expr(relname, sizeof(relname), sym_name);
                    type = ELF32_R_TYPE(rel->r_info);
                    addend = get32((uint32_t *)(text + rel->r_offset)) + rel->r_addend;
                    reloc_offset = rel->r_offset - start_offset;
                    switch(type) {
                    case R_68K_32:
		        fprintf(outfile, "    /* R_68K_32 RELOC, offset %x */\n", rel->r_offset) ;
                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s + %#x;\n",
                                reloc_offset, relname, addend );
                        break;
                    case R_68K_PC32:
		        fprintf(outfile, "    /* R_68K_PC32 RELOC, offset %x */\n", rel->r_offset);
                        fprintf(outfile, "    *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %#x) + %#x;\n",
                                reloc_offset, relname, reloc_offset, /*sym->st_value+*/ addend);
                        break;
                    default:
                        error("unsupported m68k relocation (%d)", type);
                    }
                }
                }
            }
#elif defined(HOST_MIPS) || defined(HOST_MIPS64)
            {
                for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
		    if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
                        char relname[256];
                        int type;
                        int addend;
                        int reloc_offset;

			sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name;
                        /* the compiler leave some unnecessary references to the code */
                        if (sym_name[0] == '\0')
                            continue;
                        get_reloc_expr(relname, sizeof(relname), sym_name);
			type = ELF32_R_TYPE(rel->r_info);
                        addend = get32((uint32_t *)(text + rel->r_offset));
                        reloc_offset = rel->r_offset - start_offset;
			switch (type) {
			case R_MIPS_26:
                            fprintf(outfile, "    /* R_MIPS_26 RELOC, offset 0x%x, name %s */\n",
				    rel->r_offset, sym_name);
                            fprintf(outfile,
				    "    *(uint32_t *)(gen_code_ptr + 0x%x) = "
				    "(0x%x & ~0x3fffff) "
				    "| ((0x%x + ((%s - (*(uint32_t *)(gen_code_ptr + 0x%x))) >> 2)) "
				    "   & 0x3fffff);\n",
                                    reloc_offset, addend, addend, relname, reloc_offset);
			    break;
			case R_MIPS_HI16:
                            fprintf(outfile, "    /* R_MIPS_HI16 RELOC, offset 0x%x, name %s */\n",
				    rel->r_offset, sym_name);
                            fprintf(outfile,
				    "    *(uint32_t *)(gen_code_ptr + 0x%x) = "
				    "((*(uint32_t *)(gen_code_ptr + 0x%x)) "
				    " & ~0xffff) "
				    " | (((%s - 0x8000) >> 16) & 0xffff);\n",
                                    reloc_offset, reloc_offset, relname);
			    break;
			case R_MIPS_LO16:
                            fprintf(outfile, "    /* R_MIPS_LO16 RELOC, offset 0x%x, name %s */\n",
				    rel->r_offset, sym_name);
                            fprintf(outfile,
				    "    *(uint32_t *)(gen_code_ptr + 0x%x) = "
				    "((*(uint32_t *)(gen_code_ptr + 0x%x)) "
				    " & ~0xffff) "
				    " | (%s & 0xffff);\n",
                                    reloc_offset, reloc_offset, relname);
			    break;
			case R_MIPS_PC16:
                            fprintf(outfile, "    /* R_MIPS_PC16 RELOC, offset 0x%x, name %s */\n",
				    rel->r_offset, sym_name);
                            fprintf(outfile,
				    "    *(uint32_t *)(gen_code_ptr + 0x%x) = "
				    "(0x%x & ~0xffff) "
				    "| ((0x%x + ((%s - (*(uint32_t *)(gen_code_ptr + 0x%x))) >> 2)) "
				    "   & 0xffff);\n",
                                    reloc_offset, addend, addend, relname, reloc_offset);
			    break;
			case R_MIPS_GOT16:
			case R_MIPS_CALL16:
                            fprintf(outfile, "    /* R_MIPS_GOT16 RELOC, offset 0x%x, name %s */\n",
				    rel->r_offset, sym_name);
                            fprintf(outfile,
				    "    *(uint32_t *)(gen_code_ptr + 0x%x) = "
				    "((*(uint32_t *)(gen_code_ptr + 0x%x)) "
				    " & ~0xffff) "
				    " | (((%s - 0x8000) >> 16) & 0xffff);\n",
                                    reloc_offset, reloc_offset, relname);
			    break;
			default:
			    error("unsupported MIPS relocation (%d)", type);
			}
		    }
                }
            }
#else
#error unsupported CPU
#endif
        fprintf(outfile, "    gen_code_ptr += %d;\n", copy_size);
        fprintf(outfile, "}\n");
        fprintf(outfile, "break;\n\n");
    } else {
        fprintf(outfile, "static inline void gen_%s(", name);
        if (nb_args == 0) {
            fprintf(outfile, "void");
        } else {
            for(i = 0; i < nb_args; i++) {
                if (i != 0)
                    fprintf(outfile, ", ");
                fprintf(outfile, "long param%d", i + 1);
            }
        }
        fprintf(outfile, ")\n");
        fprintf(outfile, "{\n");
        for(i = 0; i < nb_args; i++) {
            fprintf(outfile, "    *gen_opparam_ptr++ = param%d;\n", i + 1);
        }
        fprintf(outfile, "    *gen_opc_ptr++ = INDEX_%s;\n", name);
        fprintf(outfile, "}\n\n");
    }
}

int gen_file(FILE *outfile, int out_type)
{
    int i;
    EXE_SYM *sym;

    if (out_type == OUT_INDEX_OP) {
        fprintf(outfile, "DEF(end, 0, 0)\n");
        fprintf(outfile, "DEF(nop, 0, 0)\n");
        fprintf(outfile, "DEF(nop1, 1, 0)\n");
        fprintf(outfile, "DEF(nop2, 2, 0)\n");
        fprintf(outfile, "DEF(nop3, 3, 0)\n");
        for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
            const char *name;
            name = get_sym_name(sym);
            if (strstart(name, OP_PREFIX, NULL)) {
                gen_code(name, sym->st_value, sym->st_size, outfile, 2);
            }
        }
    } else if (out_type == OUT_GEN_OP) {
        /* generate gen_xxx functions */
        fprintf(outfile, "#include \"dyngen-op.h\"\n");
        for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
            const char *name;
            name = get_sym_name(sym);
            if (strstart(name, OP_PREFIX, NULL)) {
#if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
                if (sym->st_shndx != text_shndx)
                    error("invalid section for opcode (0x%x)", sym->st_shndx);
#endif
                gen_code(name, sym->st_value, sym->st_size, outfile, 0);
            }
        }

    } else {
        /* generate big code generation switch */

#ifdef HOST_ARM
        /* We need to know the size of all the ops so we can figure out when
           to emit constant pools.  This must be consistent with opc.h.  */
fprintf(outfile,
"static const uint32_t arm_opc_size[] = {\n"
"  0,\n" /* end */
"  0,\n" /* nop */
"  0,\n" /* nop1 */
"  0,\n" /* nop2 */
"  0,\n"); /* nop3 */
        for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
            const char *name;
            name = get_sym_name(sym);
            if (strstart(name, OP_PREFIX, NULL)) {
                fprintf(outfile, "  %d,\n", sym->st_size);
            }
	}
fprintf(outfile,
"};\n");
#endif

fprintf(outfile,
"int dyngen_code(uint8_t *gen_code_buf,\n"
"                uint16_t *label_offsets, uint16_t *jmp_offsets,\n"
"                const uint16_t *opc_buf, const uint32_t *opparam_buf, const long *gen_labels)\n"
"{\n"
"    uint8_t *gen_code_ptr;\n"
"    const uint16_t *opc_ptr;\n"
"    const uint32_t *opparam_ptr;\n");

#ifdef HOST_ARM
/* Arm is tricky because it uses constant pools for loading immediate values.
   We assume (and require) each function is code followed by a constant pool.
   All the ops are small so this should be ok.  For each op we figure
   out how much "spare" range we have in the load instructions.  This allows
   us to insert subsequent ops in between the op and the constant pool,
   eliminating the neeed to jump around the pool.

   We currently generate:

   [ For this example we assume merging would move op1_pool out of range.
     In practice we should be able to combine many ops before the offset
     limits are reached. ]
   op1_code;
   op2_code;
   goto op3;
   op2_pool;
   op1_pool;
op3:
   op3_code;
   ret;
   op3_pool;

   Ideally we'd put op1_pool before op2_pool, but that requires two passes.
 */
fprintf(outfile,
"    uint8_t *last_gen_code_ptr = gen_code_buf;\n"
"    LDREntry *arm_ldr_ptr = arm_ldr_table;\n"
"    uint32_t *arm_data_ptr = arm_data_table + ARM_LDR_TABLE_SIZE;\n"
/* Initialise the parmissible pool offset to an arbitary large value.  */
"    uint8_t *arm_pool_ptr = gen_code_buf + 0x1000000;\n");
#endif
#ifdef HOST_IA64
    {
	long addend, not_first = 0;
	unsigned long sym_idx;
	int index, max_index;
	const char *sym_name;
	EXE_RELOC *rel;

	max_index = -1;
	for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
	    sym_idx = ELF64_R_SYM(rel->r_info);
	    sym_name = (strtab + symtab[sym_idx].st_name);
	    if (strstart(sym_name, "__op_gen_label", NULL))
		continue;
	    if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
		continue;

	    addend = rel->r_addend;
	    index = get_plt_index(sym_name, addend);
	    if (index <= max_index)
		continue;
	    max_index = index;
	    fprintf(outfile, "    extern void %s(void);\n", sym_name);
	}

	fprintf(outfile,
		"    struct ia64_fixup *plt_fixes = NULL, "
		"*ltoff_fixes = NULL;\n"
		"    static long plt_target[] = {\n\t");

	max_index = -1;
	for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
	    sym_idx = ELF64_R_SYM(rel->r_info);
	    sym_name = (strtab + symtab[sym_idx].st_name);
	    if (strstart(sym_name, "__op_gen_label", NULL))
		continue;
	    if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
		continue;

	    addend = rel->r_addend;
	    index = get_plt_index(sym_name, addend);
	    if (index <= max_index)
		continue;
	    max_index = index;

	    if (not_first)
		fprintf(outfile, ",\n\t");
	    not_first = 1;
	    if (addend)
		fprintf(outfile, "(long) &%s + %ld", sym_name, addend);
	    else
		fprintf(outfile, "(long) &%s", sym_name);
	}
	fprintf(outfile, "\n    };\n"
	    "    unsigned int plt_offset[%u] = { 0 };\n", max_index + 1);
    }
#endif

fprintf(outfile,
"\n"
"    gen_code_ptr = gen_code_buf;\n"
"    opc_ptr = opc_buf;\n"
"    opparam_ptr = opparam_buf;\n");

	/* Generate prologue, if needed. */

fprintf(outfile,
"    for(;;) {\n");

#ifdef HOST_ARM
/* Generate constant pool if needed */
fprintf(outfile,
"            if (gen_code_ptr + arm_opc_size[*opc_ptr] >= arm_pool_ptr) {\n"
"                gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, "
"arm_ldr_ptr, arm_data_ptr, arm_data_table + ARM_LDR_TABLE_SIZE, 1);\n"
"                last_gen_code_ptr = gen_code_ptr;\n"
"                arm_ldr_ptr = arm_ldr_table;\n"
"                arm_data_ptr = arm_data_table + ARM_LDR_TABLE_SIZE;\n"
"                arm_pool_ptr = gen_code_ptr + 0x1000000;\n"
"            }\n");
#endif

fprintf(outfile,
"        switch(*opc_ptr++) {\n");

        for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
            const char *name;
            name = get_sym_name(sym);
            if (strstart(name, OP_PREFIX, NULL)) {
#if 0
                printf("%4d: %s pos=0x%08x len=%d\n",
                       i, name, sym->st_value, sym->st_size);
#endif
#if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
                if (sym->st_shndx != text_shndx)
                    error("invalid section for opcode (0x%x)", sym->st_shndx);
#endif
                gen_code(name, sym->st_value, sym->st_size, outfile, 1);
            }
        }

fprintf(outfile,
"        case INDEX_op_nop:\n"
"            break;\n"
"        case INDEX_op_nop1:\n"
"            opparam_ptr++;\n"
"            break;\n"
"        case INDEX_op_nop2:\n"
"            opparam_ptr += 2;\n"
"            break;\n"
"        case INDEX_op_nop3:\n"
"            opparam_ptr += 3;\n"
"            break;\n"
"        default:\n"
"            goto the_end;\n"
"        }\n");


fprintf(outfile,
"    }\n"
" the_end:\n"
);
#ifdef HOST_IA64
    fprintf(outfile,
	    "    {\n"
	    "      extern char code_gen_buffer[];\n"
	    "      ia64_apply_fixes(&gen_code_ptr, ltoff_fixes, "
	    "(uint64_t) code_gen_buffer + 2*(1<<20), plt_fixes,\n\t\t\t"
	    "sizeof(plt_target)/sizeof(plt_target[0]),\n\t\t\t"
	    "plt_target, plt_offset);\n    }\n");
#endif

/* generate some code patching */
#ifdef HOST_ARM
fprintf(outfile,
"if (arm_data_ptr != arm_data_table + ARM_LDR_TABLE_SIZE)\n"
"    gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, "
"arm_ldr_ptr, arm_data_ptr, arm_data_table + ARM_LDR_TABLE_SIZE, 0);\n");
#endif
    /* flush instruction cache */
    fprintf(outfile, "flush_icache_range((unsigned long)gen_code_buf, (unsigned long)gen_code_ptr);\n");

    fprintf(outfile, "return gen_code_ptr -  gen_code_buf;\n");
    fprintf(outfile, "}\n\n");

    }

    return 0;
}

void usage(void)
{
    printf("dyngen (c) 2003 Fabrice Bellard\n"
           "usage: dyngen [-o outfile] [-c] objfile\n"
           "Generate a dynamic code generator from an object file\n"
           "-c     output enum of operations\n"
           "-g     output gen_op_xx() functions\n"
           );
    exit(1);
}

int main(int argc, char **argv)
{
    int c, out_type;
    const char *filename, *outfilename;
    FILE *outfile;

    outfilename = "out.c";
    out_type = OUT_CODE;
    for(;;) {
        c = getopt(argc, argv, "ho:cg");
        if (c == -1)
            break;
        switch(c) {
        case 'h':
            usage();
            break;
        case 'o':
            outfilename = optarg;
            break;
        case 'c':
            out_type = OUT_INDEX_OP;
            break;
        case 'g':
            out_type = OUT_GEN_OP;
            break;
        }
    }
    if (optind >= argc)
        usage();
    filename = argv[optind];
    outfile = fopen(outfilename, "w");
    if (!outfile)
        error("could not open '%s'", outfilename);

    load_object(filename);
    gen_file(outfile, out_type);
    fclose(outfile);
    return 0;
}