dyngen.c@ 88

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1	/*
2	* Generic Dynamic compiler generator
3	*
4	* Copyright (c) 2003 Fabrice Bellard
5	*
6	* The COFF object format support was extracted from Kazu's QEMU port
7	* to Win32.
8	*
9	* Mach-O Support by Matt Reda and Pierre d'Herbemont
10	*
11	* This program is free software; you can redistribute it and/or modify
12	* it under the terms of the GNU General Public License as published by
13	* the Free Software Foundation; either version 2 of the License, or
14	* (at your option) any later version.
15	*
16	* This program is distributed in the hope that it will be useful,
17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19	* GNU General Public License for more details.
20	*
21	* You should have received a copy of the GNU General Public License
22	* along with this program; if not, write to the Free Software
23	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24	*/
25	#include <stdlib.h>
26	#include <stdio.h>
27	#include <string.h>
28	#include <stdarg.h>
29	#include <inttypes.h>
30	#include <unistd.h>
31	#include <fcntl.h>
32
33	#include "config-host.h"
34
35	/* NOTE: we test CONFIG_WIN32 instead of _WIN32 to enabled cross
36	compilation */
37	#if defined(CONFIG_WIN32)
38	#define CONFIG_FORMAT_COFF
39	#elif defined(CONFIG_DARWIN)
40	#define CONFIG_FORMAT_MACH
41	#elif defined(CONFIG_OS2)
42	#define CONFIG_FORMAT_AOUT
43	#else
44	#define CONFIG_FORMAT_ELF
45	#endif
46
47	#ifdef CONFIG_FORMAT_ELF
48
49	/* elf format definitions. We use these macros to test the CPU to
50	allow cross compilation (this tool must be ran on the build
51	platform) */
52	#if defined(HOST_I386)
53
54	#define ELF_CLASS ELFCLASS32
55	#define ELF_ARCH EM_386
56	#define elf_check_arch(x) ( ((x) == EM_386) \|\| ((x) == EM_486) )
57	#undef ELF_USES_RELOCA
58
59	#elif defined(HOST_X86_64)
60
61	#define ELF_CLASS ELFCLASS64
62	#define ELF_ARCH EM_X86_64
63	#define elf_check_arch(x) ((x) == EM_X86_64)
64	#define ELF_USES_RELOCA
65
66	#elif defined(HOST_PPC)
67
68	#define ELF_CLASS ELFCLASS32
69	#define ELF_ARCH EM_PPC
70	#define elf_check_arch(x) ((x) == EM_PPC)
71	#define ELF_USES_RELOCA
72
73	#elif defined(HOST_S390)
74
75	#define ELF_CLASS ELFCLASS32
76	#define ELF_ARCH EM_S390
77	#define elf_check_arch(x) ((x) == EM_S390)
78	#define ELF_USES_RELOCA
79
80	#elif defined(HOST_ALPHA)
81
82	#define ELF_CLASS ELFCLASS64
83	#define ELF_ARCH EM_ALPHA
84	#define elf_check_arch(x) ((x) == EM_ALPHA)
85	#define ELF_USES_RELOCA
86
87	#elif defined(HOST_IA64)
88
89	#define ELF_CLASS ELFCLASS64
90	#define ELF_ARCH EM_IA_64
91	#define elf_check_arch(x) ((x) == EM_IA_64)
92	#define ELF_USES_RELOCA
93
94	#elif defined(HOST_SPARC)
95
96	#define ELF_CLASS ELFCLASS32
97	#define ELF_ARCH EM_SPARC
98	#define elf_check_arch(x) ((x) == EM_SPARC \|\| (x) == EM_SPARC32PLUS)
99	#define ELF_USES_RELOCA
100
101	#elif defined(HOST_SPARC64)
102
103	#define ELF_CLASS ELFCLASS64
104	#define ELF_ARCH EM_SPARCV9
105	#define elf_check_arch(x) ((x) == EM_SPARCV9)
106	#define ELF_USES_RELOCA
107
108	#elif defined(HOST_ARM)
109
110	#define ELF_CLASS ELFCLASS32
111	#define ELF_ARCH EM_ARM
112	#define elf_check_arch(x) ((x) == EM_ARM)
113	#define ELF_USES_RELOC
114
115	#elif defined(HOST_M68K)
116
117	#define ELF_CLASS ELFCLASS32
118	#define ELF_ARCH EM_68K
119	#define elf_check_arch(x) ((x) == EM_68K)
120	#define ELF_USES_RELOCA
121
122	#else
123	#error unsupported CPU - please update the code
124	#endif
125
126	#include "elf.h"
127
128	#if ELF_CLASS == ELFCLASS32
129	typedef int32_t host_long;
130	typedef uint32_t host_ulong;
131	#define swabls(x) swab32s(x)
132	#else
133	typedef int64_t host_long;
134	typedef uint64_t host_ulong;
135	#define swabls(x) swab64s(x)
136	#endif
137
138	#ifdef ELF_USES_RELOCA
139	#define SHT_RELOC SHT_RELA
140	#else
141	#define SHT_RELOC SHT_REL
142	#endif
143
144	#define EXE_RELOC ELF_RELOC
145	#define EXE_SYM ElfW(Sym)
146
147	#endif /* CONFIG_FORMAT_ELF */
148
149	#ifdef CONFIG_FORMAT_COFF
150
151	#include "a.out.h"
152
153	typedef int32_t host_long;
154	typedef uint32_t host_ulong;
155
156	#define FILENAMELEN 256
157
158	typedef struct coff_sym {
159	struct external_syment *st_syment;
160	char st_name[FILENAMELEN];
161	uint32_t st_value;
162	int st_size;
163	uint8_t st_type;
164	uint8_t st_shndx;
165	} coff_Sym;
166
167	typedef struct coff_rel {
168	struct external_reloc *r_reloc;
169	int r_offset;
170	uint8_t r_type;
171	} coff_Rel;
172
173	#define EXE_RELOC struct coff_rel
174	#define EXE_SYM struct coff_sym
175
176	#endif /* CONFIG_FORMAT_COFF */
177
178	#ifdef CONFIG_FORMAT_MACH
179
180	#include <mach-o/loader.h>
181	#include <mach-o/nlist.h>
182	#include <mach-o/reloc.h>
183	#include <mach-o/ppc/reloc.h>
184
185	# define check_mach_header(x) (x.magic == MH_MAGIC)
186	typedef int32_t host_long;
187	typedef uint32_t host_ulong;
188
189	struct nlist_extended
190	{
191	union {
192	char *n_name;
193	long n_strx;
194	} n_un;
195	unsigned char n_type;
196	unsigned char n_sect;
197	short st_desc;
198	unsigned long st_value;
199	unsigned long st_size;
200	};
201
202	#define EXE_RELOC struct relocation_info
203	#define EXE_SYM struct nlist_extended
204
205	#endif /* CONFIG_FORMAT_MACH */
206
207	#ifdef CONFIG_FORMAT_AOUT
208
209	#include "a_out.h"
210
211	typedef int32_t host_long;
212	typedef uint32_t host_ulong;
213
214	struct nlist_extended
215	{
216	union {
217	char *n_name;
218	struct nlist *n_next;
219	long n_strx;
220	} n_un;
221	unsigned char n_type;
222	char n_other;
223	short n_desc;
224	unsigned long st_value; // n_value -> st_value
225	unsigned long st_size; // added
226	};
227
228	#define EXE_RELOC struct relocation_info
229	#define EXE_SYM struct nlist_extended
230	#define r_offset r_address
231
232	#endif /* CONFIG_FORMAT_AOUT */
233
234	#include "bswap.h"
235
236	enum {
237	OUT_GEN_OP,
238	OUT_CODE,
239	OUT_INDEX_OP,
240	};
241
242	/* all dynamically generated functions begin with this code */
243	#define OP_PREFIX "op_"
244
245	int do_swap;
246
247	void __attribute__((noreturn)) __attribute__((format (printf, 1, 2))) error(const char *fmt, ...)
248	{
249	va_list ap;
250	va_start(ap, fmt);
251	fprintf(stderr, "dyngen: ");
252	vfprintf(stderr, fmt, ap);
253	fprintf(stderr, "\n");
254	va_end(ap);
255	exit(1);
256	}
257
258	void *load_data(int fd, long offset, unsigned int size)
259	{
260	char *data;
261
262	data = malloc(size);
263	if (!data)
264	return NULL;
265	lseek(fd, offset, SEEK_SET);
266	if (read(fd, data, size) != size) {
267	free(data);
268	return NULL;
269	}
270	return data;
271	}
272
273	int strstart(const char str, const char val, const char **ptr)
274	{
275	const char p, q;
276	p = str;
277	q = val;
278	while (*q != '\0') {
279	if (p != q)
280	return 0;
281	p++;
282	q++;
283	}
284	if (ptr)
285	*ptr = p;
286	return 1;
287	}
288
289	void pstrcpy(char buf, int buf_size, const char str)
290	{
291	int c;
292	char *q = buf;
293
294	if (buf_size <= 0)
295	return;
296
297	for(;;) {
298	c = *str++;
299	if (c == 0 \|\| q >= buf + buf_size - 1)
300	break;
301	*q++ = c;
302	}
303	*q = '\0';
304	}
305
306	void swab16s(uint16_t *p)
307	{
308	p = bswap16(p);
309	}
310
311	void swab32s(uint32_t *p)
312	{
313	p = bswap32(p);
314	}
315
316	void swab64s(uint64_t *p)
317	{
318	p = bswap64(p);
319	}
320
321	uint16_t get16(uint16_t *p)
322	{
323	uint16_t val;
324	val = *p;
325	if (do_swap)
326	val = bswap16(val);
327	return val;
328	}
329
330	uint32_t get32(uint32_t *p)
331	{
332	uint32_t val;
333	val = *p;
334	if (do_swap)
335	val = bswap32(val);
336	return val;
337	}
338
339	void put16(uint16_t *p, uint16_t val)
340	{
341	if (do_swap)
342	val = bswap16(val);
343	*p = val;
344	}
345
346	void put32(uint32_t *p, uint32_t val)
347	{
348	if (do_swap)
349	val = bswap32(val);
350	*p = val;
351	}
352
353	/* executable information */
354	EXE_SYM *symtab;
355	int nb_syms;
356	int text_shndx;
357	uint8_t *text;
358	EXE_RELOC *relocs;
359	int nb_relocs;
360
361	#ifdef CONFIG_FORMAT_ELF
362
363	/* ELF file info */
364	struct elf_shdr *shdr;
365	uint8_t **sdata;
366	struct elfhdr ehdr;
367	char *strtab;
368
369	int elf_must_swap(struct elfhdr *h)
370	{
371	union {
372	uint32_t i;
373	uint8_t b[4];
374	} swaptest;
375
376	swaptest.i = 1;
377	return (h->e_ident[EI_DATA] == ELFDATA2MSB) !=
378	(swaptest.b[0] == 0);
379	}
380
381	void elf_swap_ehdr(struct elfhdr *h)
382	{
383	swab16s(&h->e_type); /* Object file type */
384	swab16s(&h-> e_machine); /* Architecture */
385	swab32s(&h-> e_version); /* Object file version */
386	swabls(&h-> e_entry); /* Entry point virtual address */
387	swabls(&h-> e_phoff); /* Program header table file offset */
388	swabls(&h-> e_shoff); /* Section header table file offset */
389	swab32s(&h-> e_flags); /* Processor-specific flags */
390	swab16s(&h-> e_ehsize); /* ELF header size in bytes */
391	swab16s(&h-> e_phentsize); /* Program header table entry size */
392	swab16s(&h-> e_phnum); /* Program header table entry count */
393	swab16s(&h-> e_shentsize); /* Section header table entry size */
394	swab16s(&h-> e_shnum); /* Section header table entry count */
395	swab16s(&h-> e_shstrndx); /* Section header string table index */
396	}
397
398	void elf_swap_shdr(struct elf_shdr *h)
399	{
400	swab32s(&h-> sh_name); /* Section name (string tbl index) */
401	swab32s(&h-> sh_type); /* Section type */
402	swabls(&h-> sh_flags); /* Section flags */
403	swabls(&h-> sh_addr); /* Section virtual addr at execution */
404	swabls(&h-> sh_offset); /* Section file offset */
405	swabls(&h-> sh_size); /* Section size in bytes */
406	swab32s(&h-> sh_link); /* Link to another section */
407	swab32s(&h-> sh_info); /* Additional section information */
408	swabls(&h-> sh_addralign); /* Section alignment */
409	swabls(&h-> sh_entsize); /* Entry size if section holds table */
410	}
411
412	void elf_swap_phdr(struct elf_phdr *h)
413	{
414	swab32s(&h->p_type); /* Segment type */
415	swabls(&h->p_offset); /* Segment file offset */
416	swabls(&h->p_vaddr); /* Segment virtual address */
417	swabls(&h->p_paddr); /* Segment physical address */
418	swabls(&h->p_filesz); /* Segment size in file */
419	swabls(&h->p_memsz); /* Segment size in memory */
420	swab32s(&h->p_flags); /* Segment flags */
421	swabls(&h->p_align); /* Segment alignment */
422	}
423
424	void elf_swap_rel(ELF_RELOC *rel)
425	{
426	swabls(&rel->r_offset);
427	swabls(&rel->r_info);
428	#ifdef ELF_USES_RELOCA
429	swabls(&rel->r_addend);
430	#endif
431	}
432
433	struct elf_shdr find_elf_section(struct elf_shdr shdr, int shnum, const char *shstr,
434	const char *name)
435	{
436	int i;
437	const char *shname;
438	struct elf_shdr *sec;
439
440	for(i = 0; i < shnum; i++) {
441	sec = &shdr[i];
442	if (!sec->sh_name)
443	continue;
444	shname = shstr + sec->sh_name;
445	if (!strcmp(shname, name))
446	return sec;
447	}
448	return NULL;
449	}
450
451	int find_reloc(int sh_index)
452	{
453	struct elf_shdr *sec;
454	int i;
455
456	for(i = 0; i < ehdr.e_shnum; i++) {
457	sec = &shdr[i];
458	if (sec->sh_type == SHT_RELOC && sec->sh_info == sh_index)
459	return i;
460	}
461	return 0;
462	}
463
464	static host_ulong get_rel_offset(EXE_RELOC *rel)
465	{
466	return rel->r_offset;
467	}
468
469	static char get_rel_sym_name(EXE_RELOC rel)
470	{
471	return strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
472	}
473
474	static char get_sym_name(EXE_SYM sym)
475	{
476	return strtab + sym->st_name;
477	}
478
479	/* load an elf object file */
480	int load_object(const char *filename)
481	{
482	int fd;
483	struct elf_shdr sec, symtab_sec, strtab_sec, text_sec;
484	int i, j;
485	ElfW(Sym) *sym;
486	char *shstr;
487	ELF_RELOC *rel;
488
489	fd = open(filename, O_RDONLY);
490	if (fd < 0)
491	error("can't open file '%s'", filename);
492
493	/* Read ELF header. */
494	if (read(fd, &ehdr, sizeof (ehdr)) != sizeof (ehdr))
495	error("unable to read file header");
496
497	/* Check ELF identification. */
498	if (ehdr.e_ident[EI_MAG0] != ELFMAG0
499	\|\| ehdr.e_ident[EI_MAG1] != ELFMAG1
500	\|\| ehdr.e_ident[EI_MAG2] != ELFMAG2
501	\|\| ehdr.e_ident[EI_MAG3] != ELFMAG3
502	\|\| ehdr.e_ident[EI_VERSION] != EV_CURRENT) {
503	error("bad ELF header");
504	}
505
506	do_swap = elf_must_swap(&ehdr);
507	if (do_swap)
508	elf_swap_ehdr(&ehdr);
509	if (ehdr.e_ident[EI_CLASS] != ELF_CLASS)
510	error("Unsupported ELF class");
511	if (ehdr.e_type != ET_REL)
512	error("ELF object file expected");
513	if (ehdr.e_version != EV_CURRENT)
514	error("Invalid ELF version");
515	if (!elf_check_arch(ehdr.e_machine))
516	error("Unsupported CPU (e_machine=%d)", ehdr.e_machine);
517
518	/* read section headers */
519	shdr = load_data(fd, ehdr.e_shoff, ehdr.e_shnum * sizeof(struct elf_shdr));
520	if (do_swap) {
521	for(i = 0; i < ehdr.e_shnum; i++) {
522	elf_swap_shdr(&shdr[i]);
523	}
524	}
525
526	/* read all section data */
527	sdata = malloc(sizeof(void ) ehdr.e_shnum);
528	memset(sdata, 0, sizeof(void ) ehdr.e_shnum);
529
530	for(i = 0;i < ehdr.e_shnum; i++) {
531	sec = &shdr[i];
532	if (sec->sh_type != SHT_NOBITS)
533	sdata[i] = load_data(fd, sec->sh_offset, sec->sh_size);
534	}
535
536	sec = &shdr[ehdr.e_shstrndx];
537	shstr = sdata[ehdr.e_shstrndx];
538
539	/* swap relocations */
540	for(i = 0; i < ehdr.e_shnum; i++) {
541	sec = &shdr[i];
542	if (sec->sh_type == SHT_RELOC) {
543	nb_relocs = sec->sh_size / sec->sh_entsize;
544	if (do_swap) {
545	for(j = 0, rel = (ELF_RELOC *)sdata[i]; j < nb_relocs; j++, rel++)
546	elf_swap_rel(rel);
547	}
548	}
549	}
550	/* text section */
551
552	text_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".text");
553	if (!text_sec)
554	error("could not find .text section");
555	text_shndx = text_sec - shdr;
556	text = sdata[text_shndx];
557
558	/* find text relocations, if any */
559	relocs = NULL;
560	nb_relocs = 0;
561	i = find_reloc(text_shndx);
562	if (i != 0) {
563	relocs = (ELF_RELOC *)sdata[i];
564	nb_relocs = shdr[i].sh_size / shdr[i].sh_entsize;
565	}
566
567	symtab_sec = find_elf_section(shdr, ehdr.e_shnum, shstr, ".symtab");
568	if (!symtab_sec)
569	error("could not find .symtab section");
570	strtab_sec = &shdr[symtab_sec->sh_link];
571
572	symtab = (ElfW(Sym) *)sdata[symtab_sec - shdr];
573	strtab = sdata[symtab_sec->sh_link];
574
575	nb_syms = symtab_sec->sh_size / sizeof(ElfW(Sym));
576	if (do_swap) {
577	for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
578	swab32s(&sym->st_name);
579	swabls(&sym->st_value);
580	swabls(&sym->st_size);
581	swab16s(&sym->st_shndx);
582	}
583	}
584	close(fd);
585	return 0;
586	}
587
588	#endif /* CONFIG_FORMAT_ELF */
589
590	#ifdef CONFIG_FORMAT_COFF
591
592	/* COFF file info */
593	struct external_scnhdr *shdr;
594	uint8_t **sdata;
595	struct external_filehdr fhdr;
596	struct external_syment *coff_symtab;
597	char *strtab;
598	int coff_text_shndx, coff_data_shndx;
599
600	int data_shndx;
601
602	#define STRTAB_SIZE 4
603
604	#define DIR32 0x06
605	#define DISP32 0x14
606
607	#define T_FUNCTION 0x20
608	#define C_EXTERNAL 2
609
610	void sym_ent_name(struct external_syment ext_sym, EXE_SYM sym)
611	{
612	char *q;
613	int c, i, len;
614
615	if (ext_sym->e.e.e_zeroes != 0) {
616	q = sym->st_name;
617	for(i = 0; i < 8; i++) {
618	c = ext_sym->e.e_name[i];
619	if (c == '\0')
620	break;
621	*q++ = c;
622	}
623	*q = '\0';
624	} else {
625	pstrcpy(sym->st_name, sizeof(sym->st_name), strtab + ext_sym->e.e.e_offset);
626	}
627
628	/* now convert the name to a C name (suppress the leading '_') */
629	if (sym->st_name[0] == '_') {
630	len = strlen(sym->st_name);
631	memmove(sym->st_name, sym->st_name + 1, len - 1);
632	sym->st_name[len - 1] = '\0';
633	}
634	}
635
636	char name_for_dotdata(struct coff_rel rel)
637	{
638	int i;
639	struct coff_sym *sym;
640	uint32_t text_data;
641
642	text_data = (uint32_t )(text + rel->r_offset);
643
644	for (i = 0, sym = symtab; i < nb_syms; i++, sym++) {
645	if (sym->st_syment->e_scnum == data_shndx &&
646	text_data >= sym->st_value &&
647	text_data < sym->st_value + sym->st_size) {
648
649	return sym->st_name;
650
651	}
652	}
653	return NULL;
654	}
655
656	static char get_sym_name(EXE_SYM sym)
657	{
658	return sym->st_name;
659	}
660
661	static char get_rel_sym_name(EXE_RELOC rel)
662	{
663	char *name;
664	name = get_sym_name(symtab + (uint32_t )(rel->r_reloc->r_symndx));
665	if (!strcmp(name, ".data"))
666	name = name_for_dotdata(rel);
667	return name;
668	}
669
670	static host_ulong get_rel_offset(EXE_RELOC *rel)
671	{
672	return rel->r_offset;
673	}
674
675	struct external_scnhdr find_coff_section(struct external_scnhdr shdr, int shnum, const char *name)
676	{
677	int i;
678	const char *shname;
679	struct external_scnhdr *sec;
680
681	for(i = 0; i < shnum; i++) {
682	sec = &shdr[i];
683	if (!sec->s_name)
684	continue;
685	shname = sec->s_name;
686	if (!strcmp(shname, name))
687	return sec;
688	}
689	return NULL;
690	}
691
692	/* load a coff object file */
693	int load_object(const char *filename)
694	{
695	int fd;
696	struct external_scnhdr sec, text_sec, *data_sec;
697	int i;
698	struct external_syment *ext_sym;
699	struct external_reloc *coff_relocs;
700	struct external_reloc *ext_rel;
701	uint32_t *n_strtab;
702	EXE_SYM *sym;
703	EXE_RELOC *rel;
704
705	fd = open(filename, O_RDONLY
706	#ifdef _WIN32
707	\| O_BINARY
708	#endif
709	);
710	if (fd < 0)
711	error("can't open file '%s'", filename);
712
713	/* Read COFF header. */
714	if (read(fd, &fhdr, sizeof (fhdr)) != sizeof (fhdr))
715	error("unable to read file header");
716
717	/* Check COFF identification. */
718	if (fhdr.f_magic != I386MAGIC) {
719	error("bad COFF header");
720	}
721	do_swap = 0;
722
723	/* read section headers */
724	shdr = load_data(fd, sizeof(struct external_filehdr) + fhdr.f_opthdr, fhdr.f_nscns * sizeof(struct external_scnhdr));
725
726	/* read all section data */
727	sdata = malloc(sizeof(void ) fhdr.f_nscns);
728	memset(sdata, 0, sizeof(void ) fhdr.f_nscns);
729
730	const char *p;
731	for(i = 0;i < fhdr.f_nscns; i++) {
732	sec = &shdr[i];
733	if (!strstart(sec->s_name, ".bss", &p))
734	sdata[i] = load_data(fd, sec->s_scnptr, sec->s_size);
735	}
736
737
738	/* text section */
739	text_sec = find_coff_section(shdr, fhdr.f_nscns, ".text");
740	if (!text_sec)
741	error("could not find .text section");
742	coff_text_shndx = text_sec - shdr;
743	text = sdata[coff_text_shndx];
744
745	/* data section */
746	data_sec = find_coff_section(shdr, fhdr.f_nscns, ".data");
747	if (!data_sec)
748	error("could not find .data section");
749	coff_data_shndx = data_sec - shdr;
750
751	coff_symtab = load_data(fd, fhdr.f_symptr, fhdr.f_nsyms*SYMESZ);
752	for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) {
753	for(i=0;i<8;i++)
754	printf(" %02x", ((uint8_t *)ext_sym->e.e_name)[i]);
755	printf("\n");
756	}
757
758
759	n_strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsyms*SYMESZ), STRTAB_SIZE);
760	strtab = load_data(fd, (fhdr.f_symptr + fhdr.f_nsymsSYMESZ), n_strtab);
761
762	nb_syms = fhdr.f_nsyms;
763
764	for (i = 0, ext_sym = coff_symtab; i < nb_syms; i++, ext_sym++) {
765	if (strstart(ext_sym->e.e_name, ".text", NULL))
766	text_shndx = ext_sym->e_scnum;
767	if (strstart(ext_sym->e.e_name, ".data", NULL))
768	data_shndx = ext_sym->e_scnum;
769	}
770
771	/* set coff symbol */
772	symtab = malloc(sizeof(struct coff_sym) * nb_syms);
773
774	int aux_size, j;
775	for (i = 0, ext_sym = coff_symtab, sym = symtab; i < nb_syms; i++, ext_sym++, sym++) {
776	memset(sym, 0, sizeof(*sym));
777	sym->st_syment = ext_sym;
778	sym_ent_name(ext_sym, sym);
779	sym->st_value = ext_sym->e_value;
780
781	aux_size = (int8_t )ext_sym->e_numaux;
782	if (ext_sym->e_scnum == text_shndx && ext_sym->e_type == T_FUNCTION) {
783	for (j = aux_size + 1; j < nb_syms - i; j++) {
784	if ((ext_sym + j)->e_scnum == text_shndx &&
785	(ext_sym + j)->e_type == T_FUNCTION ){
786	sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value;
787	break;
788	} else if (j == nb_syms - i - 1) {
789	sec = &shdr[coff_text_shndx];
790	sym->st_size = sec->s_size - ext_sym->e_value;
791	break;
792	}
793	}
794	} else if (ext_sym->e_scnum == data_shndx && (uint8_t )ext_sym->e_sclass == C_EXTERNAL) {
795	for (j = aux_size + 1; j < nb_syms - i; j++) {
796	if ((ext_sym + j)->e_scnum == data_shndx) {
797	sym->st_size = (ext_sym + j)->e_value - ext_sym->e_value;
798	break;
799	} else if (j == nb_syms - i - 1) {
800	sec = &shdr[coff_data_shndx];
801	sym->st_size = sec->s_size - ext_sym->e_value;
802	break;
803	}
804	}
805	} else {
806	sym->st_size = 0;
807	}
808
809	sym->st_type = ext_sym->e_type;
810	sym->st_shndx = ext_sym->e_scnum;
811	}
812
813
814	/* find text relocations, if any */
815	sec = &shdr[coff_text_shndx];
816	coff_relocs = load_data(fd, sec->s_relptr, sec->s_nreloc*RELSZ);
817	nb_relocs = sec->s_nreloc;
818
819	/* set coff relocation */
820	relocs = malloc(sizeof(struct coff_rel) * nb_relocs);
821	for (i = 0, ext_rel = coff_relocs, rel = relocs; i < nb_relocs;
822	i++, ext_rel++, rel++) {
823	memset(rel, 0, sizeof(*rel));
824	rel->r_reloc = ext_rel;
825	rel->r_offset = (uint32_t )ext_rel->r_vaddr;
826	rel->r_type = (uint16_t )ext_rel->r_type;
827	}
828	return 0;
829	}
830
831	#endif /* CONFIG_FORMAT_COFF */
832
833	#ifdef CONFIG_FORMAT_MACH
834
835	/* File Header */
836	struct mach_header mach_hdr;
837
838	/* commands */
839	struct segment_command *segment = 0;
840	struct dysymtab_command *dysymtabcmd = 0;
841	struct symtab_command *symtabcmd = 0;
842
843	/* section */
844	struct section *section_hdr;
845	struct section *text_sec_hdr;
846	uint8_t **sdata;
847
848	/* relocs */
849	struct relocation_info *relocs;
850
851	/* symbols */
852	EXE_SYM *symtab;
853	struct nlist *symtab_std;
854	char *strtab;
855
856	/* indirect symbols */
857	uint32_t *tocdylib;
858
859	/* Utility functions */
860
861	static inline char *find_str_by_index(int index)
862	{
863	return strtab+index;
864	}
865
866	/* Used by dyngen common code */
867	static char get_sym_name(EXE_SYM sym)
868	{
869	char *name = find_str_by_index(sym->n_un.n_strx);
870
871	if ( sym->n_type & N_STAB ) /* Debug symbols are ignored */
872	return "debug";
873
874	if(!name)
875	return name;
876	if(name[0]=='_')
877	return name + 1;
878	else
879	return name;
880	}
881
882	/* find a section index given its segname, sectname */
883	static int find_mach_sec_index(struct section section_hdr, int shnum, const char segname,
884	const char *sectname)
885	{
886	int i;
887	struct section *sec = section_hdr;
888
889	for(i = 0; i < shnum; i++, sec++) {
890	if (!sec->segname \|\| !sec->sectname)
891	continue;
892	if (!strcmp(sec->sectname, sectname) && !strcmp(sec->segname, segname))
893	return i;
894	}
895	return -1;
896	}
897
898	/* find a section header given its segname, sectname */
899	struct section find_mach_sec_hdr(struct section section_hdr, int shnum, const char *segname,
900	const char *sectname)
901	{
902	int index = find_mach_sec_index(section_hdr, shnum, segname, sectname);
903	if(index == -1)
904	return NULL;
905	return section_hdr+index;
906	}
907
908
909	static inline void fetch_next_pair_value(struct relocation_info * rel, unsigned int *value)
910	{
911	struct scattered_relocation_info * scarel;
912
913	if(R_SCATTERED & rel->r_address) {
914	scarel = (struct scattered_relocation_info*)rel;
915	if(scarel->r_type != PPC_RELOC_PAIR)
916	error("fetch_next_pair_value: looking for a pair which was not found (1)");
917	*value = scarel->r_value;
918	} else {
919	if(rel->r_type != PPC_RELOC_PAIR)
920	error("fetch_next_pair_value: looking for a pair which was not found (2)");
921	*value = rel->r_address;
922	}
923	}
924
925	/* find a sym name given its value, in a section number */
926	static const char * find_sym_with_value_and_sec_number( int value, int sectnum, int * offset )
927	{
928	int i, ret = -1;
929
930	for( i = 0 ; i < nb_syms; i++ )
931	{
932	if( !(symtab[i].n_type & N_STAB) && (symtab[i].n_type & N_SECT) &&
933	(symtab[i].n_sect == sectnum) && (symtab[i].st_value <= value) )
934	{
935	if( (ret<0) \|\| (symtab[i].st_value >= symtab[ret].st_value) )
936	ret = i;
937	}
938	}
939	if( ret < 0 ) {
940	*offset = 0;
941	return 0;
942	} else {
943	*offset = value - symtab[ret].st_value;
944	return get_sym_name(&symtab[ret]);
945	}
946	}
947
948	/*
949	* Find symbol name given a (virtual) address, and a section which is of type
950	* S_NON_LAZY_SYMBOL_POINTERS or S_LAZY_SYMBOL_POINTERS or S_SYMBOL_STUBS
951	*/
952	static const char * find_reloc_name_in_sec_ptr(int address, struct section * sec_hdr)
953	{
954	unsigned int tocindex, symindex, size;
955	const char *name = 0;
956
957	/* Sanity check */
958	if(!( address >= sec_hdr->addr && address < (sec_hdr->addr + sec_hdr->size) ) )
959	return (char*)0;
960
961	if( sec_hdr->flags & S_SYMBOL_STUBS ){
962	size = sec_hdr->reserved2;
963	if(size == 0)
964	error("size = 0");
965
966	}
967	else if( sec_hdr->flags & S_LAZY_SYMBOL_POINTERS \|\|
968	sec_hdr->flags & S_NON_LAZY_SYMBOL_POINTERS)
969	size = sizeof(unsigned long);
970	else
971	return 0;
972
973	/* Compute our index in toc */
974	tocindex = (address - sec_hdr->addr)/size;
975	symindex = tocdylib[sec_hdr->reserved1 + tocindex];
976
977	name = get_sym_name(&symtab[symindex]);
978
979	return name;
980	}
981
982	static const char * find_reloc_name_given_its_address(int address)
983	{
984	unsigned int i;
985	for(i = 0; i < segment->nsects ; i++)
986	{
987	const char * name = find_reloc_name_in_sec_ptr(address, &section_hdr[i]);
988	if((long)name != -1)
989	return name;
990	}
991	return 0;
992	}
993
994	static const char * get_reloc_name(EXE_RELOC * rel, int * sslide)
995	{
996	char * name = 0;
997	struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel;
998	int sectnum = rel->r_symbolnum;
999	int sectoffset;
1000	int other_half=0;
1001
1002	/* init the slide value */
1003	*sslide = 0;
1004
1005	if(R_SCATTERED & rel->r_address)
1006	return (char *)find_reloc_name_given_its_address(sca_rel->r_value);
1007
1008	if(rel->r_extern)
1009	{
1010	/* ignore debug sym */
1011	if ( symtab[rel->r_symbolnum].n_type & N_STAB )
1012	return 0;
1013	return get_sym_name(&symtab[rel->r_symbolnum]);
1014	}
1015
1016	/* Intruction contains an offset to the symbols pointed to, in the rel->r_symbolnum section */
1017	sectoffset = (uint32_t )(text + rel->r_address) & 0xffff;
1018
1019	if(sectnum==0xffffff)
1020	return 0;
1021
1022	/* Sanity Check */
1023	if(sectnum > segment->nsects)
1024	error("sectnum > segment->nsects");
1025
1026	switch(rel->r_type)
1027	{
1028	case PPC_RELOC_LO16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset & 0xffff);
1029	break;
1030	case PPC_RELOC_HI16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (other_half & 0xffff);
1031	break;
1032	case PPC_RELOC_HA16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (other_half & 0xffff);
1033	break;
1034	case PPC_RELOC_BR24:
1035	sectoffset = ( (uint32_t )(text + rel->r_address) & 0x03fffffc );
1036	if (sectoffset & 0x02000000) sectoffset \|= 0xfc000000;
1037	break;
1038	default:
1039	error("switch(rel->type) not found");
1040	}
1041
1042	if(rel->r_pcrel)
1043	sectoffset += rel->r_address;
1044
1045	if (rel->r_type == PPC_RELOC_BR24)
1046	name = (char *)find_reloc_name_in_sec_ptr((int)sectoffset, &section_hdr[sectnum-1]);
1047
1048	/* search it in the full symbol list, if not found */
1049	if(!name)
1050	name = (char *)find_sym_with_value_and_sec_number(sectoffset, sectnum, sslide);
1051
1052	return name;
1053	}
1054
1055	/* Used by dyngen common code */
1056	static const char * get_rel_sym_name(EXE_RELOC * rel)
1057	{
1058	int sslide;
1059	return get_reloc_name( rel, &sslide);
1060	}
1061
1062	/* Used by dyngen common code */
1063	static host_ulong get_rel_offset(EXE_RELOC *rel)
1064	{
1065	struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel;
1066	if(R_SCATTERED & rel->r_address)
1067	return sca_rel->r_address;
1068	else
1069	return rel->r_address;
1070	}
1071
1072	/* load a mach-o object file */
1073	int load_object(const char *filename)
1074	{
1075	int fd;
1076	unsigned int offset_to_segment = 0;
1077	unsigned int offset_to_dysymtab = 0;
1078	unsigned int offset_to_symtab = 0;
1079	struct load_command lc;
1080	unsigned int i, j;
1081	EXE_SYM *sym;
1082	struct nlist *syment;
1083
1084	fd = open(filename, O_RDONLY);
1085	if (fd < 0)
1086	error("can't open file '%s'", filename);
1087
1088	/* Read Mach header. */
1089	if (read(fd, &mach_hdr, sizeof (mach_hdr)) != sizeof (mach_hdr))
1090	error("unable to read file header");
1091
1092	/* Check Mach identification. */
1093	if (!check_mach_header(mach_hdr)) {
1094	error("bad Mach header");
1095	}
1096
1097	if (mach_hdr.cputype != CPU_TYPE_POWERPC)
1098	error("Unsupported CPU");
1099
1100	if (mach_hdr.filetype != MH_OBJECT)
1101	error("Unsupported Mach Object");
1102
1103	/* read segment headers */
1104	for(i=0, j=sizeof(mach_hdr); i<mach_hdr.ncmds ; i++)
1105	{
1106	if(read(fd, &lc, sizeof(struct load_command)) != sizeof(struct load_command))
1107	error("unable to read load_command");
1108	if(lc.cmd == LC_SEGMENT)
1109	{
1110	offset_to_segment = j;
1111	lseek(fd, offset_to_segment, SEEK_SET);
1112	segment = malloc(sizeof(struct segment_command));
1113	if(read(fd, segment, sizeof(struct segment_command)) != sizeof(struct segment_command))
1114	error("unable to read LC_SEGMENT");
1115	}
1116	if(lc.cmd == LC_DYSYMTAB)
1117	{
1118	offset_to_dysymtab = j;
1119	lseek(fd, offset_to_dysymtab, SEEK_SET);
1120	dysymtabcmd = malloc(sizeof(struct dysymtab_command));
1121	if(read(fd, dysymtabcmd, sizeof(struct dysymtab_command)) != sizeof(struct dysymtab_command))
1122	error("unable to read LC_DYSYMTAB");
1123	}
1124	if(lc.cmd == LC_SYMTAB)
1125	{
1126	offset_to_symtab = j;
1127	lseek(fd, offset_to_symtab, SEEK_SET);
1128	symtabcmd = malloc(sizeof(struct symtab_command));
1129	if(read(fd, symtabcmd, sizeof(struct symtab_command)) != sizeof(struct symtab_command))
1130	error("unable to read LC_SYMTAB");
1131	}
1132	j+=lc.cmdsize;
1133
1134	lseek(fd, j, SEEK_SET);
1135	}
1136
1137	if(!segment)
1138	error("unable to find LC_SEGMENT");
1139
1140	/* read section headers */
1141	section_hdr = load_data(fd, offset_to_segment + sizeof(struct segment_command), segment->nsects * sizeof(struct section));
1142
1143	/* read all section data */
1144	sdata = (uint8_t *)malloc(sizeof(void ) * segment->nsects);
1145	memset(sdata, 0, sizeof(void ) segment->nsects);
1146
1147	/* Load the data in section data */
1148	for(i = 0; i < segment->nsects; i++) {
1149	sdata[i] = load_data(fd, section_hdr[i].offset, section_hdr[i].size);
1150	}
1151
1152	/* text section */
1153	text_sec_hdr = find_mach_sec_hdr(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT);
1154	i = find_mach_sec_index(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT);
1155	if (i == -1 \|\| !text_sec_hdr)
1156	error("could not find __TEXT,__text section");
1157	text = sdata[i];
1158
1159	/* Make sure dysym was loaded */
1160	if(!(int)dysymtabcmd)
1161	error("could not find __DYSYMTAB segment");
1162
1163	/* read the table of content of the indirect sym */
1164	tocdylib = load_data( fd, dysymtabcmd->indirectsymoff, dysymtabcmd->nindirectsyms * sizeof(uint32_t) );
1165
1166	/* Make sure symtab was loaded */
1167	if(!(int)symtabcmd)
1168	error("could not find __SYMTAB segment");
1169	nb_syms = symtabcmd->nsyms;
1170
1171	symtab_std = load_data(fd, symtabcmd->symoff, symtabcmd->nsyms * sizeof(struct nlist));
1172	strtab = load_data(fd, symtabcmd->stroff, symtabcmd->strsize);
1173
1174	symtab = malloc(sizeof(EXE_SYM) * nb_syms);
1175
1176	/* Now transform the symtab, to an extended version, with the sym size, and the C name */
1177	for(i = 0, sym = symtab, syment = symtab_std; i < nb_syms; i++, sym++, syment++) {
1178	const char *name;
1179	struct nlist sym_follow, sym_next = 0;
1180	unsigned int j;
1181	name = find_str_by_index(sym->n_un.n_strx);
1182	memset(sym, 0, sizeof(*sym));
1183
1184	if ( sym->n_type & N_STAB ) /* Debug symbols are skipped */
1185	continue;
1186
1187	memcpy(sym, syment, sizeof(*syment));
1188
1189	/* Find the following symbol in order to get the current symbol size */
1190	for(j = 0, sym_follow = symtab_std; j < nb_syms; j++, sym_follow++) {
1191	if ( sym_follow->n_sect != 1 \|\| sym_follow->n_type & N_STAB \|\| !(sym_follow->n_value > sym->st_value))
1192	continue;
1193	if(!sym_next) {
1194	sym_next = sym_follow;
1195	continue;
1196	}
1197	if(!(sym_next->n_value > sym_follow->n_value))
1198	continue;
1199	sym_next = sym_follow;
1200	}
1201	if(sym_next)
1202	sym->st_size = sym_next->n_value - sym->st_value;
1203	else
1204	sym->st_size = text_sec_hdr->size - sym->st_value;
1205	}
1206
1207	/* Find Reloc */
1208	relocs = load_data(fd, text_sec_hdr->reloff, text_sec_hdr->nreloc * sizeof(struct relocation_info));
1209	nb_relocs = text_sec_hdr->nreloc;
1210
1211	close(fd);
1212	return 0;
1213	}
1214
1215	#endif /* CONFIG_FORMAT_MACH */
1216
1217	#ifdef CONFIG_FORMAT_AOUT
1218
1219	struct exec *aout_hdr;
1220	struct nlist *symtab_std;
1221	char *strtab;
1222
1223
1224	/* Utility functions */
1225
1226	static inline char *find_str_by_index(int index)
1227	{
1228	return strtab+index;
1229	}
1230
1231	/* Used by dyngen common code */
1232	static char get_sym_name(EXE_SYM sym)
1233	{
1234	char *name = find_str_by_index(sym->n_un.n_strx);
1235
1236	if (sym->n_type & N_STAB) /* Debug symbols are ignored */
1237	return "debug";
1238	if (name && name[0] == '_')
1239	return name + 1;
1240	return name;
1241	}
1242
1243	static int type_to_sec_number(unsigned type)
1244	{
1245	switch (type)
1246	{
1247	case 0: case 0 \|N_EXT: case N_WEAKU: return N_UNDF;
1248	case N_ABS: case N_ABS \|N_EXT: case N_WEAKA: return N_ABS;
1249	case N_TEXT: case N_TEXT\|N_EXT: case N_WEAKT: return N_TEXT;
1250	case N_DATA: case N_DATA\|N_EXT: case N_WEAKD: return N_DATA;
1251	case N_BSS: case N_BSS \|N_EXT: case N_WEAKB: return N_BSS;
1252	case N_SETA: case N_SETA\|N_EXT: return N_SETA;
1253	case N_SETT: case N_SETT\|N_EXT: return N_SETT;
1254	case N_SETD: case N_SETD\|N_EXT: return N_SETD;
1255
1256	default:
1257	return type;
1258	}
1259	}
1260
1261	/* find a sym name given its value, in a section number */
1262	static const char find_sym_with_value_and_sec_number(long value, int sec, int offset)
1263	{
1264	int i, ret = -1;
1265
1266	for (i = 0; i < nb_syms; i++) {
1267	if ( !(symtab[i].n_type & N_STAB)
1268	&& type_to_sec_number(symtab[i].n_type) == sec
1269	&& symtab[i].st_value <= value
1270	&& ( ret < 0
1271	\|\| symtab[i].st_value >= symtab[ret].st_value)) {
1272	ret = i;
1273	}
1274	}
1275	if (ret < 0) {
1276	*offset = 0;
1277	return 0;
1278	}
1279	*offset = value - symtab[ret].st_value;
1280	return get_sym_name(&symtab[ret]);
1281	}
1282
1283	static const char get_rel_sym_name_and_addend(EXE_RELOC rel, int *sslide)
1284	{
1285	int sec;
1286	int off;
1287
1288	*sslide = 0;
1289
1290	if (rel->r_extern)
1291	{
1292	/* ignore debug sym */
1293	if (symtab[rel->r_symbolnum].n_type & N_STAB)
1294	return 0;
1295
1296	/* The intruction contains the addend. */
1297	off = (uint32_t )(text + rel->r_address);
1298	if (rel->r_pcrel)
1299	off += rel->r_address;
1300	*sslide = off;
1301	return get_sym_name(&symtab[rel->r_symbolnum]);
1302	}
1303	if (rel->r_symbolnum == 0xffffff)
1304	return 0;
1305
1306	sec = rel->r_symbolnum & ~N_EXT;
1307	/* sanity */
1308	switch (sec)
1309	{
1310	case N_TEXT: case N_DATA: case N_BSS: case N_ABS: break;
1311	default: error("invalid section %d", sec);
1312	}
1313
1314	/* The intruction contains the addend. */
1315	off = (uint32_t )(text + rel->r_address);
1316	if (rel->r_pcrel)
1317	off += rel->r_address;
1318
1319	/* search it in the full symbol list, if not found */
1320	return find_sym_with_value_and_sec_number(off, sec, sslide);
1321	}
1322
1323	/* Used by dyngen common code */
1324	static const char * get_rel_sym_name(EXE_RELOC *rel)
1325	{
1326	int ignored;
1327	return get_rel_sym_name_and_addend(rel, &ignored);
1328	}
1329
1330	/* Used by dyngen common code */
1331	static host_ulong get_rel_offset(EXE_RELOC *rel)
1332	{
1333	return rel->r_address;
1334	}
1335
1336	/* load a a.out object file */
1337	int load_object(const char *filename)
1338	{
1339	FILE *pf;
1340	long file_size;
1341	unsigned i;
1342	EXE_SYM *dst_sym;
1343	struct nlist *src_sym;
1344
1345	/*
1346	* Open the file and validate the header.
1347	*/
1348	pf = fopen(filename, "rb");
1349	if (!pf)
1350	error("can't open file '%s'", filename);
1351
1352	/* we're optimistic, read the entire file first. */
1353	if (fseek(pf, 0, SEEK_END) != 0)
1354	error("Input file '%s' is not seekable", filename);
1355	file_size = ftell(pf);
1356	fseek(pf, 0L, SEEK_SET);
1357
1358	aout_hdr = malloc(file_size + 1);
1359	if (!aout_hdr)
1360	error("malloc(%ld) failed", file_size + 1);
1361	if (fread(aout_hdr, 1, file_size, pf) != file_size)
1362	error("error reading '%s'", filename);
1363	fclose(pf);
1364
1365	/* validate the header. */
1366	if (N_MAGIC(*aout_hdr) != OMAGIC)
1367	error("unknown magic: %lo", N_MAGIC(*aout_hdr));
1368	if (N_MACHTYPE(aout_hdr) != M_386 && N_MACHTYPE(aout_hdr) != 0)
1369	error("unsupported machtype: %d", N_MACHTYPE(*aout_hdr));
1370
1371	/* setup globals. */
1372	strtab = (char )((uint8_t )aout_hdr + N_STROFF(*aout_hdr));
1373	symtab_std = (struct nlist )((uint8_t )aout_hdr + N_SYMOFF(*aout_hdr));
1374
1375	relocs = (struct relocation_info )((uint8_t )aout_hdr + N_TRELOFF(*aout_hdr));
1376	nb_syms = aout_hdr->a_syms / sizeof(struct nlist);
1377	text_shndx = 1;
1378	text = (uint8_t )aout_hdr + N_TXTOFF(aout_hdr);
1379	nb_relocs = aout_hdr->a_trsize / sizeof(relocs[0]);
1380
1381	/*
1382	* Now transform the symtab, to an extended version, with the sym size, and the C name
1383	*/
1384	src_sym = symtab_std;
1385	dst_sym = symtab = malloc(sizeof(EXE_SYM) * nb_syms);
1386	if (!dst_sym)
1387	error("malloc(%zd) failed", sizeof(EXE_SYM) * nb_syms);
1388	for (i = 0; i < nb_syms; i++, src_sym++, dst_sym++) {
1389	struct nlist *sym_next = NULL;
1390	struct nlist *sym_cur;
1391	unsigned sec;
1392	unsigned j;
1393
1394	/* copy the symbol and find the name. */
1395	dst_sym->n_un.n_strx = src_sym->n_un.n_strx;
1396	dst_sym->n_type = src_sym->n_type;
1397	dst_sym->n_other = src_sym->n_other;
1398	dst_sym->n_desc = src_sym->n_desc;
1399	dst_sym->st_value = src_sym->n_value;
1400	dst_sym->st_size = 0;
1401	if (src_sym->n_type & N_STAB)
1402	continue; /* skip debug symbols. */
1403
1404	/* Find the following symbol in order to get the current symbol size */
1405	sec = type_to_sec_number(dst_sym->n_type);
1406	for (j = 0, sym_cur = symtab_std; j < nb_syms; j++, sym_cur++) {
1407	if ( type_to_sec_number(sym_cur->n_type) != sec
1408	\|\| (sym_cur->n_type & N_STAB)
1409	\|\| sym_cur->n_value <= dst_sym->st_value)
1410	continue;
1411	if ( sym_next
1412	&& sym_next->n_value <= sym_cur->n_value)
1413	continue;
1414	/* good one */
1415	sym_next = sym_cur;
1416	}
1417	if (sym_next)
1418	dst_sym->st_size = sym_next->n_value - dst_sym->st_value;
1419	else
1420	dst_sym->st_size = aout_hdr->a_text - dst_sym->st_value;
1421	}
1422
1423	return 0;
1424	}
1425
1426	#endif /* CONFIG_FORMAT_AOUT */
1427
1428
1429	void get_reloc_expr(char name, int name_size, const char sym_name)
1430	{
1431	const char *p;
1432
1433	if (strstart(sym_name, "__op_param", &p)) {
1434	snprintf(name, name_size, "param%s", p);
1435	} else if (strstart(sym_name, "__op_gen_label", &p)) {
1436	snprintf(name, name_size, "gen_labels[param%s]", p);
1437	} else {
1438	#ifdef HOST_SPARC
1439	if (sym_name[0] == '.')
1440	snprintf(name, sizeof(name),
1441	"(long)(&__dot_%s)",
1442	sym_name + 1);
1443	else
1444	#endif
1445	snprintf(name, name_size, "(long)(&%s)", sym_name);
1446	}
1447	}
1448
1449	#ifdef HOST_ARM
1450
1451	int arm_emit_ldr_info(const char *name, unsigned long start_offset,
1452	FILE outfile, uint8_t p_start, uint8_t *p_end,
1453	ELF_RELOC *relocs, int nb_relocs)
1454	{
1455	uint8_t *p;
1456	uint32_t insn;
1457	int offset, min_offset, pc_offset, data_size;
1458	uint8_t data_allocated[1024];
1459	unsigned int data_index;
1460
1461	memset(data_allocated, 0, sizeof(data_allocated));
1462
1463	p = p_start;
1464	min_offset = p_end - p_start;
1465	while (p < p_start + min_offset) {
1466	insn = get32((uint32_t *)p);
1467	if ((insn & 0x0d5f0000) == 0x051f0000) {
1468	/* ldr reg, [pc, #im] */
1469	offset = insn & 0xfff;
1470	if (!(insn & 0x00800000))
1471	offset = -offset;
1472	if ((offset & 3) !=0)
1473	error("%s:%04x: ldr pc offset must be 32 bit aligned",
1474	name, start_offset + p - p_start);
1475	pc_offset = p - p_start + offset + 8;
1476	if (pc_offset <= (p - p_start) \|\|
1477	pc_offset >= (p_end - p_start))
1478	error("%s:%04x: ldr pc offset must point inside the function code",
1479	name, start_offset + p - p_start);
1480	if (pc_offset < min_offset)
1481	min_offset = pc_offset;
1482	if (outfile) {
1483	/* ldr position */
1484	fprintf(outfile, " arm_ldr_ptr->ptr = gen_code_ptr + %d;\n",
1485	p - p_start);
1486	/* ldr data index */
1487	data_index = ((p_end - p_start) - pc_offset - 4) >> 2;
1488	fprintf(outfile, " arm_ldr_ptr->data_ptr = arm_data_ptr + %d;\n",
1489	data_index);
1490	fprintf(outfile, " arm_ldr_ptr++;\n");
1491	if (data_index >= sizeof(data_allocated))
1492	error("%s: too many data", name);
1493	if (!data_allocated[data_index]) {
1494	ELF_RELOC *rel;
1495	int i, addend, type;
1496	const char sym_name, p;
1497	char relname[1024];
1498
1499	data_allocated[data_index] = 1;
1500
1501	/* data value */
1502	addend = get32((uint32_t *)(p_start + pc_offset));
1503	relname[0] = '\0';
1504	for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1505	if (rel->r_offset == (pc_offset + start_offset)) {
1506	sym_name = get_rel_sym_name(rel);
1507	/* the compiler leave some unnecessary references to the code */
1508	get_reloc_expr(relname, sizeof(relname), sym_name);
1509	type = ELF32_R_TYPE(rel->r_info);
1510	if (type != R_ARM_ABS32)
1511	error("%s: unsupported data relocation", name);
1512	break;
1513	}
1514	}
1515	fprintf(outfile, " arm_data_ptr[%d] = 0x%x",
1516	data_index, addend);
1517	if (relname[0] != '\0')
1518	fprintf(outfile, " + %s", relname);
1519	fprintf(outfile, ";\n");
1520	}
1521	}
1522	}
1523	p += 4;
1524	}
1525	data_size = (p_end - p_start) - min_offset;
1526	if (data_size > 0 && outfile) {
1527	fprintf(outfile, " arm_data_ptr += %d;\n", data_size >> 2);
1528	}
1529
1530	/* the last instruction must be a mov pc, lr */
1531	if (p == p_start)
1532	goto arm_ret_error;
1533	p -= 4;
1534	insn = get32((uint32_t *)p);
1535	if ((insn & 0xffff0000) != 0xe91b0000) {
1536	arm_ret_error:
1537	if (!outfile)
1538	printf("%s: invalid epilog\n", name);
1539	}
1540	return p - p_start;
1541	}
1542	#endif
1543
1544
1545	#define MAX_ARGS 3
1546
1547	/* generate op code */
1548	void gen_code(const char *name, host_ulong offset, host_ulong size,
1549	FILE *outfile, int gen_switch)
1550	{
1551	int copy_size = 0;
1552	uint8_t p_start, p_end;
1553	host_ulong start_offset;
1554	int nb_args, i, n;
1555	uint8_t args_present[MAX_ARGS];
1556	const char sym_name, p;
1557	EXE_RELOC *rel;
1558
1559	/* Compute exact size excluding prologue and epilogue instructions.
1560	* Increment start_offset to skip epilogue instructions, then compute
1561	* copy_size the indicate the size of the remaining instructions (in
1562	* bytes).
1563	*/
1564	p_start = text + offset;
1565	p_end = p_start + size;
1566	start_offset = offset;
1567	#if defined(HOST_I386) \|\| defined(HOST_X86_64)
1568	#if defined(CONFIG_FORMAT_COFF) \|\| defined(CONFIG_FORMAT_AOUT)
1569	{
1570	uint8_t *p;
1571	p = p_end - 1;
1572	if (p == p_start)
1573	error("empty code for %s", name);
1574	while (*p != 0xc3) {
1575	p--;
1576	if (p <= p_start)
1577	error("ret or jmp expected at the end of %s", name);
1578	}
1579	copy_size = p - p_start;
1580	}
1581	#else
1582	{
1583	int len;
1584	len = p_end - p_start;
1585	if (len == 0)
1586	error("empty code for %s", name);
1587	if (p_end[-1] == 0xc3) {
1588	len--;
1589	} else {
1590	error("ret or jmp expected at the end of %s", name);
1591	}
1592	copy_size = len;
1593	}
1594	#endif
1595	#elif defined(HOST_PPC)
1596	{
1597	uint8_t *p;
1598	p = (void *)(p_end - 4);
1599	if (p == p_start)
1600	error("empty code for %s", name);
1601	if (get32((uint32_t *)p) != 0x4e800020)
1602	error("blr expected at the end of %s", name);
1603	copy_size = p - p_start;
1604	}
1605	#elif defined(HOST_S390)
1606	{
1607	uint8_t *p;
1608	p = (void *)(p_end - 2);
1609	if (p == p_start)
1610	error("empty code for %s", name);
1611	if (get16((uint16_t )p) != 0x07fe && get16((uint16_t )p) != 0x07f4)
1612	error("br %%r14 expected at the end of %s", name);
1613	copy_size = p - p_start;
1614	}
1615	#elif defined(HOST_ALPHA)
1616	{
1617	uint8_t *p;
1618	p = p_end - 4;
1619	#if 0
1620	/* XXX: check why it occurs */
1621	if (p == p_start)
1622	error("empty code for %s", name);
1623	#endif
1624	if (get32((uint32_t *)p) != 0x6bfa8001)
1625	error("ret expected at the end of %s", name);
1626	copy_size = p - p_start;
1627	}
1628	#elif defined(HOST_IA64)
1629	{
1630	uint8_t *p;
1631	p = (void *)(p_end - 4);
1632	if (p == p_start)
1633	error("empty code for %s", name);
1634	/* br.ret.sptk.many b0;; */
1635	/* 08 00 84 00 */
1636	if (get32((uint32_t *)p) != 0x00840008)
1637	error("br.ret.sptk.many b0;; expected at the end of %s", name);
1638	copy_size = p - p_start;
1639	}
1640	#elif defined(HOST_SPARC)
1641	{
1642	uint32_t start_insn, end_insn1, end_insn2;
1643	uint8_t *p;
1644	p = (void *)(p_end - 8);
1645	if (p <= p_start)
1646	error("empty code for %s", name);
1647	start_insn = get32((uint32_t *)(p_start + 0x0));
1648	end_insn1 = get32((uint32_t *)(p + 0x0));
1649	end_insn2 = get32((uint32_t *)(p + 0x4));
1650	if ((start_insn & ~0x1fff) == 0x9de3a000) {
1651	p_start += 0x4;
1652	start_offset += 0x4;
1653	if ((int)(start_insn \| ~0x1fff) < -128)
1654	error("Found bogus save at the start of %s", name);
1655	if (end_insn1 != 0x81c7e008 \|\| end_insn2 != 0x81e80000)
1656	error("ret; restore; not found at end of %s", name);
1657	} else {
1658	error("No save at the beginning of %s", name);
1659	}
1660	#if 0
1661	/* Skip a preceeding nop, if present. */
1662	if (p > p_start) {
1663	skip_insn = get32((uint32_t *)(p - 0x4));
1664	if (skip_insn == 0x01000000)
1665	p -= 4;
1666	}
1667	#endif
1668	copy_size = p - p_start;
1669	}
1670	#elif defined(HOST_SPARC64)
1671	{
1672	uint32_t start_insn, end_insn1, end_insn2, skip_insn;
1673	uint8_t *p;
1674	p = (void *)(p_end - 8);
1675	if (p <= p_start)
1676	error("empty code for %s", name);
1677	start_insn = get32((uint32_t *)(p_start + 0x0));
1678	end_insn1 = get32((uint32_t *)(p + 0x0));
1679	end_insn2 = get32((uint32_t *)(p + 0x4));
1680	if ((start_insn & ~0x1fff) == 0x9de3a000) {
1681	p_start += 0x4;
1682	start_offset += 0x4;
1683	if ((int)(start_insn \| ~0x1fff) < -256)
1684	error("Found bogus save at the start of %s", name);
1685	if (end_insn1 != 0x81c7e008 \|\| end_insn2 != 0x81e80000)
1686	error("ret; restore; not found at end of %s", name);
1687	} else {
1688	error("No save at the beginning of %s", name);
1689	}
1690
1691	/* Skip a preceeding nop, if present. */
1692	if (p > p_start) {
1693	skip_insn = get32((uint32_t *)(p - 0x4));
1694	if (skip_insn == 0x01000000)
1695	p -= 4;
1696	}
1697
1698	copy_size = p - p_start;
1699	}
1700	#elif defined(HOST_ARM)
1701	{
1702	if ((p_end - p_start) <= 16)
1703	error("%s: function too small", name);
1704	if (get32((uint32_t *)p_start) != 0xe1a0c00d \|\|
1705	(get32((uint32_t *)(p_start + 4)) & 0xffff0000) != 0xe92d0000 \|\|
1706	get32((uint32_t *)(p_start + 8)) != 0xe24cb004)
1707	error("%s: invalid prolog", name);
1708	p_start += 12;
1709	start_offset += 12;
1710	copy_size = arm_emit_ldr_info(name, start_offset, NULL, p_start, p_end,
1711	relocs, nb_relocs);
1712	}
1713	#elif defined(HOST_M68K)
1714	{
1715	uint8_t *p;
1716	p = (void *)(p_end - 2);
1717	if (p == p_start)
1718	error("empty code for %s", name);
1719	// remove NOP's, probably added for alignment
1720	while ((get16((uint16_t *)p) == 0x4e71) &&
1721	(p>p_start))
1722	p -= 2;
1723	if (get16((uint16_t *)p) != 0x4e75)
1724	error("rts expected at the end of %s", name);
1725	copy_size = p - p_start;
1726	}
1727	#else
1728	#error unsupported CPU
1729	#endif
1730
1731	/* compute the number of arguments by looking at the relocations */
1732	for(i = 0;i < MAX_ARGS; i++)
1733	args_present[i] = 0;
1734
1735	for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1736	host_ulong offset = get_rel_offset(rel);
1737	if (offset >= start_offset &&
1738	offset < start_offset + (p_end - p_start)) {
1739	sym_name = get_rel_sym_name(rel);
1740	if(!sym_name)
1741	continue;
1742	if (strstart(sym_name, "__op_param", &p) \|\|
1743	strstart(sym_name, "__op_gen_label", &p)) {
1744	n = strtoul(p, NULL, 10);
1745	if (n > MAX_ARGS)
1746	error("too many arguments in %s", name);
1747	args_present[n - 1] = 1;
1748	}
1749	}
1750	}
1751
1752	nb_args = 0;
1753	while (nb_args < MAX_ARGS && args_present[nb_args])
1754	nb_args++;
1755	for(i = nb_args; i < MAX_ARGS; i++) {
1756	if (args_present[i])
1757	error("inconsistent argument numbering in %s", name);
1758	}
1759
1760	if (gen_switch == 2) {
1761	fprintf(outfile, "DEF(%s, %d, %d)\n", name + 3, nb_args, copy_size);
1762	} else if (gen_switch == 1) {
1763
1764	/* output C code */
1765	fprintf(outfile, "case INDEX_%s: {\n", name);
1766	if (nb_args > 0) {
1767	fprintf(outfile, " long ");
1768	for(i = 0; i < nb_args; i++) {
1769	if (i != 0)
1770	fprintf(outfile, ", ");
1771	fprintf(outfile, "param%d", i + 1);
1772	}
1773	fprintf(outfile, ";\n");
1774	}
1775	fprintf(outfile, " extern void %s();\n", name);
1776
1777	for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1778	host_ulong offset = get_rel_offset(rel);
1779	if (offset >= start_offset &&
1780	offset < start_offset + (p_end - p_start)) {
1781	sym_name = get_rel_sym_name(rel);
1782	if(!sym_name)
1783	continue;
1784	if (*sym_name &&
1785	!strstart(sym_name, "__op_param", NULL) &&
1786	!strstart(sym_name, "__op_jmp", NULL) &&
1787	!strstart(sym_name, "__op_gen_label", NULL)) {
1788	#if defined(HOST_SPARC)
1789	if (sym_name[0] == '.') {
1790	fprintf(outfile,
1791	"extern char __dot_%s __asm__(\"%s\");\n",
1792	sym_name+1, sym_name);
1793	continue;
1794	}
1795	#endif
1796	#ifdef VBOX
1797	if ( strcmp(sym_name, "remR3PhysWriteBytes")
1798	&& strcmp(sym_name, "remR3PhysReadBytes")
1799	&& strcmp(sym_name, "remR3PhysReadUByte")
1800	&& strcmp(sym_name, "remR3PhysReadSByte")
1801	&& strcmp(sym_name, "remR3PhysReadUWord")
1802	&& strcmp(sym_name, "remR3PhysReadSWord")
1803	&& strcmp(sym_name, "remR3PhysReadULong")
1804	&& strcmp(sym_name, "remR3PhysReadSLong")
1805	&& strcmp(sym_name, "remR3PhysWriteByte")
1806	&& strcmp(sym_name, "remR3PhysWriteWord")
1807	&& strcmp(sym_name, "remR3PhysWriteDword"))
1808	#endif /* VBOX */
1809	#ifdef __APPLE__
1810	/* set __attribute((unused)) on darwin because we wan't to avoid warning when we don't use the symbol */
1811	fprintf(outfile, "extern char %s __attribute__((unused));\n", sym_name);
1812	#else
1813	fprintf(outfile, "extern char %s;\n", sym_name);
1814	#endif
1815	}
1816	}
1817	}
1818
1819	fprintf(outfile, " memcpy(gen_code_ptr, (void )((char )&%s+%d), %d);\n",
1820	name, (int)(start_offset - offset), copy_size);
1821
1822	/* emit code offset information */
1823	{
1824	EXE_SYM *sym;
1825	const char sym_name, p;
1826	unsigned long val;
1827	int n;
1828
1829	for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
1830	sym_name = get_sym_name(sym);
1831	if (strstart(sym_name, "__op_label", &p)) {
1832	uint8_t *ptr;
1833	unsigned long offset;
1834
1835	/* test if the variable refers to a label inside
1836	the code we are generating */
1837	#ifdef CONFIG_FORMAT_COFF
1838	if (sym->st_shndx == text_shndx) {
1839	ptr = sdata[coff_text_shndx];
1840	} else if (sym->st_shndx == data_shndx) {
1841	ptr = sdata[coff_data_shndx];
1842	} else {
1843	ptr = NULL;
1844	}
1845	#elif defined(CONFIG_FORMAT_MACH)
1846	if(!sym->n_sect)
1847	continue;
1848	ptr = sdata[sym->n_sect-1];
1849	#elif defined(CONFIG_FORMAT_AOUT)
1850	switch (type_to_sec_number(sym->n_type))
1851	{
1852	case N_TEXT: ptr = (uint8_t )aout_hdr + N_TXTOFF(aout_hdr); break;
1853	case N_DATA: ptr = (uint8_t )aout_hdr + N_DATOFF(aout_hdr); break;
1854	default: ptr = NULL;
1855	}
1856	#else
1857	ptr = sdata[sym->st_shndx];
1858	#endif
1859	if (!ptr)
1860	error("__op_labelN in invalid section");
1861	offset = sym->st_value;
1862	#ifdef CONFIG_FORMAT_MACH
1863	offset -= section_hdr[sym->n_sect-1].addr;
1864	#elif defined(CONFIG_FORMAT_AOUT)
1865	if (type_to_sec_number(sym->n_type) == N_DATA)
1866	offset -= aout_hdr->a_text;
1867	#endif
1868	val = (unsigned long )(ptr + offset);
1869	#ifdef ELF_USES_RELOCA
1870	{
1871	int reloc_shndx, nb_relocs1, j;
1872
1873	/* try to find a matching relocation */
1874	reloc_shndx = find_reloc(sym->st_shndx);
1875	if (reloc_shndx) {
1876	nb_relocs1 = shdr[reloc_shndx].sh_size /
1877	shdr[reloc_shndx].sh_entsize;
1878	rel = (ELF_RELOC *)sdata[reloc_shndx];
1879	for(j = 0; j < nb_relocs1; j++) {
1880	if (rel->r_offset == offset) {
1881	val = rel->r_addend;
1882	break;
1883	}
1884	rel++;
1885	}
1886	}
1887	}
1888	#endif
1889	if (val >= start_offset && val <= start_offset + copy_size) {
1890	n = strtol(p, NULL, 10);
1891	fprintf(outfile, " label_offsets[%d] = %ld + (gen_code_ptr - gen_code_buf);\n", n, val - start_offset);
1892	}
1893	}
1894	}
1895	}
1896
1897	/* load parameres in variables */
1898	for(i = 0; i < nb_args; i++) {
1899	fprintf(outfile, " param%d = *opparam_ptr++;\n", i + 1);
1900	}
1901
1902	/* patch relocations */
1903	#if defined(HOST_I386)
1904	{
1905	char name[256];
1906	int type;
1907	int addend;
1908	for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1909	if (rel->r_offset >= start_offset &&
1910	rel->r_offset < start_offset + copy_size) {
1911	#ifdef CONFIG_FORMAT_AOUT
1912	sym_name = get_rel_sym_name_and_addend(rel, &addend);
1913	#else
1914	sym_name = get_rel_sym_name(rel);
1915	#endif
1916	if (strstart(sym_name, "__op_jmp", &p)) {
1917	int n;
1918	n = strtol(p, NULL, 10);
1919	/* __op_jmp relocations are done at
1920	runtime to do translated block
1921	chaining: the offset of the instruction
1922	needs to be stored */
1923	fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
1924	n, rel->r_offset - start_offset);
1925	continue;
1926	}
1927
1928	get_reloc_expr(name, sizeof(name), sym_name);
1929	#ifndef CONFIG_FORMAT_AOUT
1930	addend = get32((uint32_t *)(text + rel->r_offset));
1931	#endif
1932	#ifdef CONFIG_FORMAT_ELF
1933	type = ELF32_R_TYPE(rel->r_info);
1934	switch(type) {
1935	case R_386_32:
1936	fprintf(outfile, " (uint32_t )(gen_code_ptr + %d) = %s + %d;\n",
1937	rel->r_offset - start_offset, name, addend);
1938	break;
1939	case R_386_PC32:
1940	fprintf(outfile, " (uint32_t )(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
1941	rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
1942	break;
1943	default:
1944	error("unsupported i386 relocation (%d)", type);
1945	}
1946	#elif defined(CONFIG_FORMAT_COFF)
1947	{
1948	char *temp_name;
1949	int j;
1950	EXE_SYM *sym;
1951	temp_name = get_sym_name(symtab + (uint32_t )(rel->r_reloc->r_symndx));
1952	if (!strcmp(temp_name, ".data")) {
1953	for (j = 0, sym = symtab; j < nb_syms; j++, sym++) {
1954	if (strstart(sym->st_name, sym_name, NULL)) {
1955	addend -= sym->st_value;
1956	}
1957	}
1958	}
1959	}
1960	type = rel->r_type;
1961	switch(type) {
1962	case DIR32:
1963	fprintf(outfile, " (uint32_t )(gen_code_ptr + %d) = %s + %d;\n",
1964	rel->r_offset - start_offset, name, addend);
1965	break;
1966	case DISP32:
1967	fprintf(outfile, " (uint32_t )(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d -4;\n",
1968	rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
1969	break;
1970	default:
1971	error("unsupported i386 relocation (%d)", type);
1972	}
1973	#elif defined(CONFIG_FORMAT_AOUT)
1974	if (rel->r_pcrel) {
1975	fprintf(outfile, " (uint32_t )(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
1976	rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
1977	} else {
1978	fprintf(outfile, " (uint32_t )(gen_code_ptr + %d) = %s + %d;\n",
1979	rel->r_offset - start_offset, name, addend);
1980	}
1981	(void)type;
1982	#else
1983	#error unsupport object format
1984	#endif
1985	}
1986	}
1987	}
1988	#elif defined(HOST_X86_64)
1989	{
1990	char name[256];
1991	int type;
1992	int addend;
1993	for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
1994	if (rel->r_offset >= start_offset &&
1995	rel->r_offset < start_offset + copy_size) {
1996	sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
1997	get_reloc_expr(name, sizeof(name), sym_name);
1998	type = ELF32_R_TYPE(rel->r_info);
1999	addend = rel->r_addend;
2000	switch(type) {
2001	case R_X86_64_32:
2002	fprintf(outfile, " (uint32_t )(gen_code_ptr + %d) = (uint32_t)%s + %d;\n",
2003	rel->r_offset - start_offset, name, addend);
2004	break;
2005	case R_X86_64_32S:
2006	fprintf(outfile, " (uint32_t )(gen_code_ptr + %d) = (int32_t)%s + %d;\n",
2007	rel->r_offset - start_offset, name, addend);
2008	break;
2009	case R_X86_64_PC32:
2010	fprintf(outfile, " (uint32_t )(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
2011	rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
2012	break;
2013	default:
2014	error("unsupported X86_64 relocation (%d)", type);
2015	}
2016	}
2017	}
2018	}
2019	#elif defined(HOST_PPC)
2020	{
2021	#ifdef CONFIG_FORMAT_ELF
2022	char name[256];
2023	int type;
2024	int addend;
2025	for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2026	if (rel->r_offset >= start_offset &&
2027	rel->r_offset < start_offset + copy_size) {
2028	sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
2029	if (strstart(sym_name, "__op_jmp", &p)) {
2030	int n;
2031	n = strtol(p, NULL, 10);
2032	/* __op_jmp relocations are done at
2033	runtime to do translated block
2034	chaining: the offset of the instruction
2035	needs to be stored */
2036	fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
2037	n, rel->r_offset - start_offset);
2038	continue;
2039	}
2040
2041	get_reloc_expr(name, sizeof(name), sym_name);
2042	type = ELF32_R_TYPE(rel->r_info);
2043	addend = rel->r_addend;
2044	switch(type) {
2045	case R_PPC_ADDR32:
2046	fprintf(outfile, " (uint32_t )(gen_code_ptr + %d) = %s + %d;\n",
2047	rel->r_offset - start_offset, name, addend);
2048	break;
2049	case R_PPC_ADDR16_LO:
2050	fprintf(outfile, " (uint16_t )(gen_code_ptr + %d) = (%s + %d);\n",
2051	rel->r_offset - start_offset, name, addend);
2052	break;
2053	case R_PPC_ADDR16_HI:
2054	fprintf(outfile, " (uint16_t )(gen_code_ptr + %d) = (%s + %d) >> 16;\n",
2055	rel->r_offset - start_offset, name, addend);
2056	break;
2057	case R_PPC_ADDR16_HA:
2058	fprintf(outfile, " (uint16_t )(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16;\n",
2059	rel->r_offset - start_offset, name, addend);
2060	break;
2061	case R_PPC_REL24:
2062	/* warning: must be at 32 MB distancy */
2063	fprintf(outfile, " (uint32_t )(gen_code_ptr + %d) = ((uint32_t )(gen_code_ptr + %d) & ~0x03fffffc) \| ((%s - (long)(gen_code_ptr + %d) + %d) & 0x03fffffc);\n",
2064	rel->r_offset - start_offset, rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
2065	break;
2066	default:
2067	error("unsupported powerpc relocation (%d)", type);
2068	}
2069	}
2070	}
2071	#elif defined(CONFIG_FORMAT_MACH)
2072	struct scattered_relocation_info *scarel;
2073	struct relocation_info * rel;
2074	char final_sym_name[256];
2075	const char *sym_name;
2076	const char *p;
2077	int slide, sslide;
2078	int i;
2079
2080	for(i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
2081	unsigned int offset, length, value = 0;
2082	unsigned int type, pcrel, isym = 0;
2083	unsigned int usesym = 0;
2084
2085	if(R_SCATTERED & rel->r_address) {
2086	scarel = (struct scattered_relocation_info*)rel;
2087	offset = (unsigned int)scarel->r_address;
2088	length = scarel->r_length;
2089	pcrel = scarel->r_pcrel;
2090	type = scarel->r_type;
2091	value = scarel->r_value;
2092	} else {
2093	value = isym = rel->r_symbolnum;
2094	usesym = (rel->r_extern);
2095	offset = rel->r_address;
2096	length = rel->r_length;
2097	pcrel = rel->r_pcrel;
2098	type = rel->r_type;
2099	}
2100
2101	slide = offset - start_offset;
2102
2103	if (!(offset >= start_offset && offset < start_offset + size))
2104	continue; /* not in our range */
2105
2106	sym_name = get_reloc_name(rel, &sslide);
2107
2108	if(usesym && symtab[isym].n_type & N_STAB)
2109	continue; /* don't handle STAB (debug sym) */
2110
2111	if (sym_name && strstart(sym_name, "__op_jmp", &p)) {
2112	int n;
2113	n = strtol(p, NULL, 10);
2114	fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
2115	n, slide);
2116	continue; /* Nothing more to do */
2117	}
2118
2119	if(!sym_name)
2120	{
2121	fprintf(outfile, "/* #warning relocation not handled in %s (value 0x%x, %s, offset 0x%x, length 0x%x, %s, type 0x%x) */\n",
2122	name, value, usesym ? "use sym" : "don't use sym", offset, length, pcrel ? "pcrel":"", type);
2123	continue; /* dunno how to handle without final_sym_name */
2124	}
2125
2126	get_reloc_expr(final_sym_name, sizeof(final_sym_name),
2127	sym_name);
2128	switch(type) {
2129	case PPC_RELOC_BR24:
2130	fprintf(outfile, "{\n");
2131	fprintf(outfile, " uint32_t imm = (uint32_t )(gen_code_ptr + %d) & 0x3fffffc;\n", slide);
2132	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",
2133	slide, slide, name, sslide );
2134	fprintf(outfile, "}\n");
2135	break;
2136	case PPC_RELOC_HI16:
2137	fprintf(outfile, " (uint16_t )(gen_code_ptr + %d + 2) = (%s + %d) >> 16;\n",
2138	slide, final_sym_name, sslide);
2139	break;
2140	case PPC_RELOC_LO16:
2141	fprintf(outfile, " (uint16_t )(gen_code_ptr + %d + 2) = (%s + %d);\n",
2142	slide, final_sym_name, sslide);
2143	break;
2144	case PPC_RELOC_HA16:
2145	fprintf(outfile, " (uint16_t )(gen_code_ptr + %d + 2) = (%s + %d + 0x8000) >> 16;\n",
2146	slide, final_sym_name, sslide);
2147	break;
2148	default:
2149	error("unsupported powerpc relocation (%d)", type);
2150	}
2151	}
2152	#else
2153	#error unsupport object format
2154	#endif
2155	}
2156	#elif defined(HOST_S390)
2157	{
2158	char name[256];
2159	int type;
2160	int addend;
2161	for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2162	if (rel->r_offset >= start_offset &&
2163	rel->r_offset < start_offset + copy_size) {
2164	sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
2165	get_reloc_expr(name, sizeof(name), sym_name);
2166	type = ELF32_R_TYPE(rel->r_info);
2167	addend = rel->r_addend;
2168	switch(type) {
2169	case R_390_32:
2170	fprintf(outfile, " (uint32_t )(gen_code_ptr + %d) = %s + %d;\n",
2171	rel->r_offset - start_offset, name, addend);
2172	break;
2173	case R_390_16:
2174	fprintf(outfile, " (uint16_t )(gen_code_ptr + %d) = %s + %d;\n",
2175	rel->r_offset - start_offset, name, addend);
2176	break;
2177	case R_390_8:
2178	fprintf(outfile, " (uint8_t )(gen_code_ptr + %d) = %s + %d;\n",
2179	rel->r_offset - start_offset, name, addend);
2180	break;
2181	default:
2182	error("unsupported s390 relocation (%d)", type);
2183	}
2184	}
2185	}
2186	}
2187	#elif defined(HOST_ALPHA)
2188	{
2189	for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
2190	if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
2191	int type;
2192
2193	type = ELF64_R_TYPE(rel->r_info);
2194	sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
2195	switch (type) {
2196	case R_ALPHA_GPDISP:
2197	/* The gp is just 32 bit, and never changes, so it's easiest to emit it
2198	as an immediate instead of constructing it from the pv or ra. */
2199	fprintf(outfile, " immediate_ldah(gen_code_ptr + %ld, gp);\n",
2200	rel->r_offset - start_offset);
2201	fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, gp);\n",
2202	rel->r_offset - start_offset + rel->r_addend);
2203	break;
2204	case R_ALPHA_LITUSE:
2205	/* jsr to literal hint. Could be used to optimize to bsr. Ignore for
2206	now, since some called functions (libc) need pv to be set up. */
2207	break;
2208	case R_ALPHA_HINT:
2209	/* Branch target prediction hint. Ignore for now. Should be already
2210	correct for in-function jumps. */
2211	break;
2212	case R_ALPHA_LITERAL:
2213	/* Load a literal from the GOT relative to the gp. Since there's only a
2214	single gp, nothing is to be done. */
2215	break;
2216	case R_ALPHA_GPRELHIGH:
2217	/* Handle fake relocations against __op_param symbol. Need to emit the
2218	high part of the immediate value instead. Other symbols need no
2219	special treatment. */
2220	if (strstart(sym_name, "__op_param", &p))
2221	fprintf(outfile, " immediate_ldah(gen_code_ptr + %ld, param%s);\n",
2222	rel->r_offset - start_offset, p);
2223	break;
2224	case R_ALPHA_GPRELLOW:
2225	if (strstart(sym_name, "__op_param", &p))
2226	fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, param%s);\n",
2227	rel->r_offset - start_offset, p);
2228	break;
2229	case R_ALPHA_BRSGP:
2230	/* PC-relative jump. Tweak offset to skip the two instructions that try to
2231	set up the gp from the pv. */
2232	fprintf(outfile, " fix_bsr(gen_code_ptr + %ld, (uint8_t *) &%s - (gen_code_ptr + %ld + 4) + 8);\n",
2233	rel->r_offset - start_offset, sym_name, rel->r_offset - start_offset);
2234	break;
2235	default:
2236	error("unsupported Alpha relocation (%d)", type);
2237	}
2238	}
2239	}
2240	}
2241	#elif defined(HOST_IA64)
2242	{
2243	char name[256];
2244	int type;
2245	int addend;
2246	for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2247	if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
2248	sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
2249	get_reloc_expr(name, sizeof(name), sym_name);
2250	type = ELF64_R_TYPE(rel->r_info);
2251	addend = rel->r_addend;
2252	switch(type) {
2253	case R_IA64_LTOFF22:
2254	error("must implemnt R_IA64_LTOFF22 relocation");
2255	case R_IA64_PCREL21B:
2256	error("must implemnt R_IA64_PCREL21B relocation");
2257	default:
2258	error("unsupported ia64 relocation (%d)", type);
2259	}
2260	}
2261	}
2262	}
2263	#elif defined(HOST_SPARC)
2264	{
2265	char name[256];
2266	int type;
2267	int addend;
2268	for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2269	if (rel->r_offset >= start_offset &&
2270	rel->r_offset < start_offset + copy_size) {
2271	sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name;
2272	get_reloc_expr(name, sizeof(name), sym_name);
2273	type = ELF32_R_TYPE(rel->r_info);
2274	addend = rel->r_addend;
2275	switch(type) {
2276	case R_SPARC_32:
2277	fprintf(outfile, " (uint32_t )(gen_code_ptr + %d) = %s + %d;\n",
2278	rel->r_offset - start_offset, name, addend);
2279	break;
2280	case R_SPARC_HI22:
2281	fprintf(outfile,
2282	" (uint32_t )(gen_code_ptr + %d) = "
2283	"(((uint32_t )(gen_code_ptr + %d)) "
2284	" & ~0x3fffff) "
2285	" \| (((%s + %d) >> 10) & 0x3fffff);\n",
2286	rel->r_offset - start_offset,
2287	rel->r_offset - start_offset,
2288	name, addend);
2289	break;
2290	case R_SPARC_LO10:
2291	fprintf(outfile,
2292	" (uint32_t )(gen_code_ptr + %d) = "
2293	"(((uint32_t )(gen_code_ptr + %d)) "
2294	" & ~0x3ff) "
2295	" \| ((%s + %d) & 0x3ff);\n",
2296	rel->r_offset - start_offset,
2297	rel->r_offset - start_offset,
2298	name, addend);
2299	break;
2300	case R_SPARC_WDISP30:
2301	fprintf(outfile,
2302	" (uint32_t )(gen_code_ptr + %d) = "
2303	"(((uint32_t )(gen_code_ptr + %d)) "
2304	" & ~0x3fffffff) "
2305	" \| ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
2306	" & 0x3fffffff);\n",
2307	rel->r_offset - start_offset,
2308	rel->r_offset - start_offset,
2309	name, addend,
2310	rel->r_offset - start_offset);
2311	break;
2312	default:
2313	error("unsupported sparc relocation (%d)", type);
2314	}
2315	}
2316	}
2317	}
2318	#elif defined(HOST_SPARC64)
2319	{
2320	char name[256];
2321	int type;
2322	int addend;
2323	for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2324	if (rel->r_offset >= start_offset &&
2325	rel->r_offset < start_offset + copy_size) {
2326	sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
2327	get_reloc_expr(name, sizeof(name), sym_name);
2328	type = ELF64_R_TYPE(rel->r_info);
2329	addend = rel->r_addend;
2330	switch(type) {
2331	case R_SPARC_32:
2332	fprintf(outfile, " (uint32_t )(gen_code_ptr + %d) = %s + %d;\n",
2333	rel->r_offset - start_offset, name, addend);
2334	break;
2335	case R_SPARC_HI22:
2336	fprintf(outfile,
2337	" (uint32_t )(gen_code_ptr + %d) = "
2338	"(((uint32_t )(gen_code_ptr + %d)) "
2339	" & ~0x3fffff) "
2340	" \| (((%s + %d) >> 10) & 0x3fffff);\n",
2341	rel->r_offset - start_offset,
2342	rel->r_offset - start_offset,
2343	name, addend);
2344	break;
2345	case R_SPARC_LO10:
2346	fprintf(outfile,
2347	" (uint32_t )(gen_code_ptr + %d) = "
2348	"(((uint32_t )(gen_code_ptr + %d)) "
2349	" & ~0x3ff) "
2350	" \| ((%s + %d) & 0x3ff);\n",
2351	rel->r_offset - start_offset,
2352	rel->r_offset - start_offset,
2353	name, addend);
2354	break;
2355	case R_SPARC_WDISP30:
2356	fprintf(outfile,
2357	" (uint32_t )(gen_code_ptr + %d) = "
2358	"(((uint32_t )(gen_code_ptr + %d)) "
2359	" & ~0x3fffffff) "
2360	" \| ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
2361	" & 0x3fffffff);\n",
2362	rel->r_offset - start_offset,
2363	rel->r_offset - start_offset,
2364	name, addend,
2365	rel->r_offset - start_offset);
2366	break;
2367	default:
2368	error("unsupported sparc64 relocation (%d)", type);
2369	}
2370	}
2371	}
2372	}
2373	#elif defined(HOST_ARM)
2374	{
2375	char name[256];
2376	int type;
2377	int addend;
2378
2379	arm_emit_ldr_info(name, start_offset, outfile, p_start, p_end,
2380	relocs, nb_relocs);
2381
2382	for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2383	if (rel->r_offset >= start_offset &&
2384	rel->r_offset < start_offset + copy_size) {
2385	sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
2386	/* the compiler leave some unnecessary references to the code */
2387	if (sym_name[0] == '\0')
2388	continue;
2389	get_reloc_expr(name, sizeof(name), sym_name);
2390	type = ELF32_R_TYPE(rel->r_info);
2391	addend = get32((uint32_t *)(text + rel->r_offset));
2392	switch(type) {
2393	case R_ARM_ABS32:
2394	fprintf(outfile, " (uint32_t )(gen_code_ptr + %d) = %s + %d;\n",
2395	rel->r_offset - start_offset, name, addend);
2396	break;
2397	case R_ARM_PC24:
2398	fprintf(outfile, " arm_reloc_pc24((uint32_t *)(gen_code_ptr + %d), 0x%x, %s);\n",
2399	rel->r_offset - start_offset, addend, name);
2400	break;
2401	default:
2402	error("unsupported arm relocation (%d)", type);
2403	}
2404	}
2405	}
2406	}
2407	#elif defined(HOST_M68K)
2408	{
2409	char name[256];
2410	int type;
2411	int addend;
2412	Elf32_Sym *sym;
2413	for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
2414	if (rel->r_offset >= start_offset &&
2415	rel->r_offset < start_offset + copy_size) {
2416	sym = &(symtab[ELFW(R_SYM)(rel->r_info)]);
2417	sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
2418	get_reloc_expr(name, sizeof(name), sym_name);
2419	type = ELF32_R_TYPE(rel->r_info);
2420	addend = get32((uint32_t *)(text + rel->r_offset)) + rel->r_addend;
2421	switch(type) {
2422	case R_68K_32:
2423	fprintf(outfile, " /* R_68K_32 RELOC, offset %x */\n", rel->r_offset) ;
2424	fprintf(outfile, " (uint32_t )(gen_code_ptr + %d) = %s + %#x;\n",
2425	rel->r_offset - start_offset, name, addend );
2426	break;
2427	case R_68K_PC32:
2428	fprintf(outfile, " /* R_68K_PC32 RELOC, offset %x */\n", rel->r_offset);
2429	fprintf(outfile, " (uint32_t )(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %#x) + %#x;\n",
2430	rel->r_offset - start_offset, name, rel->r_offset - start_offset, /sym->st_value+/ addend);
2431	break;
2432	default:
2433	error("unsupported m68k relocation (%d)", type);
2434	}
2435	}
2436	}
2437	}
2438	#else
2439	#error unsupported CPU
2440	#endif
2441	fprintf(outfile, " gen_code_ptr += %d;\n", copy_size);
2442	fprintf(outfile, "}\n");
2443	fprintf(outfile, "break;\n\n");
2444	} else {
2445	fprintf(outfile, "static inline void gen_%s(", name);
2446	if (nb_args == 0) {
2447	fprintf(outfile, "void");
2448	} else {
2449	for(i = 0; i < nb_args; i++) {
2450	if (i != 0)
2451	fprintf(outfile, ", ");
2452	fprintf(outfile, "long param%d", i + 1);
2453	}
2454	}
2455	fprintf(outfile, ")\n");
2456	fprintf(outfile, "{\n");
2457	for(i = 0; i < nb_args; i++) {
2458	fprintf(outfile, " *gen_opparam_ptr++ = param%d;\n", i + 1);
2459	}
2460	fprintf(outfile, " *gen_opc_ptr++ = INDEX_%s;\n", name);
2461	fprintf(outfile, "}\n\n");
2462	}
2463	}
2464
2465	int gen_file(FILE *outfile, int out_type)
2466	{
2467	int i;
2468	EXE_SYM *sym;
2469
2470	if (out_type == OUT_INDEX_OP) {
2471	fprintf(outfile, "DEF(end, 0, 0)\n");
2472	fprintf(outfile, "DEF(nop, 0, 0)\n");
2473	fprintf(outfile, "DEF(nop1, 1, 0)\n");
2474	fprintf(outfile, "DEF(nop2, 2, 0)\n");
2475	fprintf(outfile, "DEF(nop3, 3, 0)\n");
2476	for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
2477	const char *name;
2478	name = get_sym_name(sym);
2479	if (strstart(name, OP_PREFIX, NULL)) {
2480	gen_code(name, sym->st_value, sym->st_size, outfile, 2);
2481	}
2482	}
2483	} else if (out_type == OUT_GEN_OP) {
2484	/* generate gen_xxx functions */
2485	fprintf(outfile, "#include \"dyngen-op.h\"\n");
2486	for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
2487	const char *name;
2488	name = get_sym_name(sym);
2489	if (strstart(name, OP_PREFIX, NULL)) {
2490	#if defined(CONFIG_FORMAT_ELF) \|\| defined(CONFIG_FORMAT_COFF)
2491	if (sym->st_shndx != text_shndx)
2492	error("invalid section for opcode (0x%x)", sym->st_shndx);
2493	#endif
2494	gen_code(name, sym->st_value, sym->st_size, outfile, 0);
2495	}
2496	}
2497
2498	} else {
2499	/* generate big code generation switch */
2500	fprintf(outfile,
2501	"int dyngen_code(uint8_t *gen_code_buf,\n"
2502	" uint16_t label_offsets, uint16_t jmp_offsets,\n"
2503	" const uint16_t opc_buf, const uint32_t opparam_buf, const long *gen_labels)\n"
2504	"{\n"
2505	" uint8_t *gen_code_ptr;\n"
2506	" const uint16_t *opc_ptr;\n"
2507	" const uint32_t *opparam_ptr;\n");
2508
2509	#ifdef HOST_ARM
2510	fprintf(outfile,
2511	" uint8_t *last_gen_code_ptr = gen_code_buf;\n"
2512	" LDREntry *arm_ldr_ptr = arm_ldr_table;\n"
2513	" uint32_t *arm_data_ptr = arm_data_table;\n");
2514	#endif
2515
2516	fprintf(outfile,
2517	"\n"
2518	" gen_code_ptr = gen_code_buf;\n"
2519	" opc_ptr = opc_buf;\n"
2520	" opparam_ptr = opparam_buf;\n");
2521
2522	/* Generate prologue, if needed. */
2523
2524	fprintf(outfile,
2525	" for(;;) {\n"
2526	" switch(*opc_ptr++) {\n"
2527	);
2528
2529	for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
2530	const char *name;
2531	name = get_sym_name(sym);
2532	if (strstart(name, OP_PREFIX, NULL)) {
2533	#if 0
2534	printf("%4d: %s pos=0x%08x len=%d\n",
2535	i, name, sym->st_value, sym->st_size);
2536	#endif
2537	#if defined(CONFIG_FORMAT_ELF) \|\| defined(CONFIG_FORMAT_COFF)
2538	if (sym->st_shndx != text_shndx)
2539	error("invalid section for opcode (0x%x)", sym->st_shndx);
2540	#endif
2541	gen_code(name, sym->st_value, sym->st_size, outfile, 1);
2542	}
2543	}
2544
2545	fprintf(outfile,
2546	" case INDEX_op_nop:\n"
2547	" break;\n"
2548	" case INDEX_op_nop1:\n"
2549	" opparam_ptr++;\n"
2550	" break;\n"
2551	" case INDEX_op_nop2:\n"
2552	" opparam_ptr += 2;\n"
2553	" break;\n"
2554	" case INDEX_op_nop3:\n"
2555	" opparam_ptr += 3;\n"
2556	" break;\n"
2557	" default:\n"
2558	" goto the_end;\n"
2559	" }\n");
2560
2561	#ifdef HOST_ARM
2562	/* generate constant table if needed */
2563	fprintf(outfile,
2564	" if ((gen_code_ptr - last_gen_code_ptr) >= (MAX_FRAG_SIZE - MAX_OP_SIZE)) {\n"
2565	" gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, arm_ldr_ptr, arm_data_table, arm_data_ptr, 1);\n"
2566	" last_gen_code_ptr = gen_code_ptr;\n"
2567	" arm_ldr_ptr = arm_ldr_table;\n"
2568	" arm_data_ptr = arm_data_table;\n"
2569	" }\n");
2570	#endif
2571
2572
2573	fprintf(outfile,
2574	" }\n"
2575	" the_end:\n"
2576	);
2577
2578	/* generate some code patching */
2579	#ifdef HOST_ARM
2580	fprintf(outfile, "gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, arm_ldr_ptr, arm_data_table, arm_data_ptr, 0);\n");
2581	#endif
2582	/* flush instruction cache */
2583	fprintf(outfile, "flush_icache_range((unsigned long)gen_code_buf, (unsigned long)gen_code_ptr);\n");
2584
2585	fprintf(outfile, "return gen_code_ptr - gen_code_buf;\n");
2586	fprintf(outfile, "}\n\n");
2587
2588	}
2589
2590	return 0;
2591	}
2592
2593	void usage(void)
2594	{
2595	printf("dyngen (c) 2003 Fabrice Bellard\n"
2596	"usage: dyngen [-o outfile] [-c] objfile\n"
2597	"Generate a dynamic code generator from an object file\n"
2598	"-c output enum of operations\n"
2599	"-g output gen_op_xx() functions\n"
2600	);
2601	exit(1);
2602	}
2603
2604	int main(int argc, char **argv)
2605	{
2606	int c, out_type;
2607	const char filename, outfilename;
2608	FILE *outfile;
2609
2610	outfilename = "out.c";
2611	out_type = OUT_CODE;
2612	for(;;) {
2613	c = getopt(argc, argv, "ho:cg");
2614	if (c == -1)
2615	break;
2616	switch(c) {
2617	case 'h':
2618	usage();
2619	break;
2620	case 'o':
2621	outfilename = optarg;
2622	break;
2623	case 'c':
2624	out_type = OUT_INDEX_OP;
2625	break;
2626	case 'g':
2627	out_type = OUT_GEN_OP;
2628	break;
2629	}
2630	}
2631	if (optind >= argc)
2632	usage();
2633	filename = argv[optind];
2634	outfile = fopen(outfilename, "w");
2635	if (!outfile)
2636	error("could not open '%s'", outfilename);
2637
2638	load_object(filename);
2639	gen_file(outfile, out_type);
2640	fclose(outfile);
2641	return 0;
2642	}

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source: vbox/trunk/src/recompiler/dyngen.c@ 88

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