/[gxemul]/trunk/src/file/file_ecoff.c
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Annotation of /trunk/src/file/file_ecoff.c

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Revision 42 - (hide annotations)
Mon Oct 8 16:22:32 2007 UTC (16 years, 8 months ago) by dpavlin
File MIME type: text/plain
File size: 13472 byte(s) 
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.1613 2007/06/15 20:11:26 debug Exp $
20070501	Continuing a little on m88k disassembly (control registers,
		more instructions).
		Adding a dummy mvme88k machine mode.
20070502	Re-adding MIPS load/store alignment exceptions.
20070503	Implementing more of the M88K disassembly code.
20070504	Adding disassembly of some more M88K load/store instructions.
		Implementing some relatively simple M88K instructions (br.n,
		xor[.u] imm, and[.u] imm).
20070505	Implementing M88K three-register and, or, xor, and jmp[.n],
		bsr[.n] including function call trace stuff.
		Applying a patch from Bruce M. Simpson which implements the
		SYSCON_BOARD_CPU_CLOCK_FREQ_ID object of the syscon call in
		the yamon PROM emulation.
20070506	Implementing M88K bb0[.n] and bb1[.n], and skeletons for
		ldcr and stcr (although no control regs are implemented yet).
20070509	Found and fixed the bug which caused Linux for QEMU_MIPS to
		stop working in 0.4.5.1: It was a faulty change to the MIPS
		'sc' and 'scd' instructions I made while going through gcc -W
		warnings on 20070428.
20070510	Updating the Linux/QEMU_MIPS section in guestoses.html to
		use mips-test-0.2.tar.gz instead of 0.1.
		A big thank you to Miod Vallat for sending me M88K manuals.
		Implementing more M88K instructions (addu, subu, div[u], mulu,
		ext[u], clr, set, cmp).
20070511	Fixing bugs in the M88K "and" and "and.u" instructions (found
		by comparing against the manual).
		Implementing more M88K instructions (mask[.u], mak, bcnd (auto-
		generated)) and some more control register details.
		Cleanup: Removing the experimental AVR emulation mode and
		corresponding devices; AVR emulation wasn't really meaningful.
		Implementing autogeneration of most M88K loads/stores. The
		rectangle drawing demo (with -O0) for M88K runs :-)
		Beginning on M88K exception handling.
		More M88K instructions: tb0, tb1, rte, sub, jsr[.n].
		Adding some skeleton MVME PROM ("BUG") emulation.
20070512	Fixing a bug in the M88K cmp instruction.
		Adding the M88K lda (scaled register) instruction.
		Fixing bugs in 64-bit (32-bit pairs) M88K loads/stores.
		Removing the unused tick_hz stuff from the machine struct.
		Implementing the M88K xmem instruction. OpenBSD/mvme88k gets
		far enough to display the Copyright banner :-)
		Implementing subu.co (guess), addu.co, addu.ci, ff0, and ff1.
		Adding a dev_mvme187, for MVME187-specific devices/registers.
		OpenBSD/mvme88k prints more boot messages. :)
20070515	Continuing on MVME187 emulation (adding more devices, beginning
		on the CMMUs, etc).
		Adding the M88K and.c, xor.c, and or.c instructions, and making
		sure that mul, div, etc cause exceptions if executed when SFD1
		is disabled.
20070517	Continuing on M88K and MVME187 emulation in general; moving
		the CMMU registers to the CPU struct, separating dev_pcc2 from
		dev_mvme187, and beginning on memory_m88k.c (BATC and PATC).
		Fixing a bug in 64-bit (32-bit pairs) M88K fast stores.
		Implementing the clock part of dev_mk48txx.
		Implementing the M88K fstcr and xcr instructions.
		Implementing m88k_cpu_tlbdump().
		Beginning on the implementation of a separate address space
		for M88K .usr loads/stores.
20070520	Removing the non-working (skeleton) Sandpoint, SonyNEWS, SHARK
		Dnard, and Zaurus machine modes.
		Experimenting with dyntrans to_be_translated read-ahead. It
		seems to give a very small performance increase for MIPS
		emulation, but a large performance degradation for SuperH. Hm.
20070522	Disabling correct SuperH ITLB emulation; it does not seem to be
		necessary in order to let SH4 guest OSes run, and it slows down
		userspace code.
		Implementing "samepage" branches for SuperH emulation, and some
		other minor speed hacks.
20070525	Continuing on M88K memory-related stuff: exceptions, memory
		transaction register contents, etc.
		Implementing the M88K subu.ci instruction.
		Removing the non-working (skeleton) Iyonix machine mode.
		OpenBSD/mvme88k reaches userland :-), starts executing
		/sbin/init's instructions, and issues a few syscalls, before
		crashing.
20070526	Fixing bugs in dev_mk48txx, so that OpenBSD/mvme88k detects
		the correct time-of-day.
		Implementing a generic IRQ controller for the test machines
		(dev_irqc), similar to a proposed patch from Petr Stepan.
		Experimenting some more with translation read-ahead.
		Adding an "expect" script for automated OpenBSD/landisk
		install regression/performance tests.
20070527	Adding a dummy mmEye (SH3) machine mode skeleton.
		FINALLY found the strange M88K bug I have been hunting: I had
		not emulated the SNIP value for exceptions occurring in
		branch delay slots correctly.
		Implementing correct exceptions for 64-bit M88K loads/stores.
		Address to symbol lookups are now disabled when M88K is
		running in usermode (because usermode addresses don't have
		anything to do with supervisor addresses).
20070531	Removing the mmEye machine mode skeleton.
20070604	Some minor code cleanup.
20070605	Moving src/useremul.c into a subdir (src/useremul/), and
		cleaning up some more legacy constructs.
		Adding -Wstrict-aliasing and -fstrict-aliasing detection to
		the configure script.
20070606	Adding a check for broken GCC on Solaris to the configure
		script. (GCC 3.4.3 on Solaris cannot handle static variables
		which are initialized to 0 or NULL. :-/)
		Removing the old (non-working) ARC emulation modes: NEC RD94,
		R94, R96, and R98, and the last traces of Olivetti M700 and
		Deskstation Tyne.
		Removing the non-working skeleton WDSC device (dev_wdsc).
20070607	Thinking about how to use the host's cc + ld at runtime to
		generate native code. (See experiments/native_cc_ld_test.i
		for an example.)
20070608	Adding a program counter sampling timer, which could be useful
		for native code generation experiments.
		The KN02_CSR_NRMMOD bit in the DECstation 5000/200 (KN02) CSR
		should always be set, to allow a 5000/200 PROM to boot.
20070609	Moving out breakpoint details from the machine struct into
		a helper struct, and removing the limit on max nr of
		breakpoints.
20070610	Moving out tick functions into a helper struct as well (which
		also gets rid of the max limit).
20070612	FINALLY figured out why Debian/DECstation stopped working when
		translation read-ahead was enabled: in src/memory_rw.c, the
		call to invalidate_code_translation was made also if the
		memory access was an instruction load (if the page was mapped
		as writable); it shouldn't be called in that case.
20070613	Implementing some more MIPS32/64 revision 2 instructions: di,
		ei, ext, dext, dextm, dextu, and ins.
20070614	Implementing an instruction combination for the NetBSD/arm
		idle loop (making the host not use any cpu if NetBSD/arm
		inside the emulator is not using any cpu).
		Increasing the nr of ARM VPH entries from 128 to 384.
20070615	Removing the ENABLE_arch stuff from the configure script, so
		that all included architectures are included in both release
		and development builds.
		Moving memory related helper functions from misc.c to memory.c.
		Adding preliminary instructions for netbooting NetBSD/pmppc to
		guestoses.html; it doesn't work yet, there are weird timeouts.
		Beginning a total rewrite of the userland emulation modes
		(removing all emulation modes, beginning from scratch with
		NetBSD/MIPS and FreeBSD/Alpha only).
20070616	After fixing a bug in the DEC21143 NIC (the TDSTAT_OWN bit was
		only cleared for the last segment when transmitting, not all
		segments), NetBSD/pmppc boots with root-on-nfs without the
		timeouts. Updating guestoses.html.
		Removing the skeleton PSP (Playstation Portable) mode.
		Moving X11-related stuff in the machine struct into a helper
		struct.
		Cleanup of out-of-memory checks, to use a new CHECK_ALLOCATION
		macro (which prints a meaningful error message).
		Adding a COMMENT to each machine and device (for automagic
		.index comment generation).
		Doing regression testing for the next release.

==============  RELEASE 0.4.6  ==============
1 dpavlin 38 /*
2     * Copyright (C) 2003-2007 Anders Gavare. All rights reserved.
3     *
4     * Redistribution and use in source and binary forms, with or without
5     * modification, are permitted provided that the following conditions are met:
6     *
7     * 1. Redistributions of source code must retain the above copyright
8     * notice, this list of conditions and the following disclaimer.
9     * 2. Redistributions in binary form must reproduce the above copyright
10     * notice, this list of conditions and the following disclaimer in the
11     * documentation and/or other materials provided with the distribution.
12     * 3. The name of the author may not be used to endorse or promote products
13     * derived from this software without specific prior written permission.
14     *
15     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18     * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25     * SUCH DAMAGE.
26     *
27     *
28 dpavlin 42 * $Id: file_ecoff.c,v 1.2 2007/06/15 17:02:39 debug Exp $
29 dpavlin 38 *
30     * ECOFF file support.
31     */
32    
33     /* Note: Included from file.c. */
34    
35    
36     #include "exec_ecoff.h"
37    
38    
39     /* Special symbol format used by Microsoft-ish COFF files: */
40     struct ms_sym {
41     unsigned char name[8];
42     unsigned char value[4];
43     unsigned char section[2];
44     unsigned char type[2];
45     unsigned char storage_class;
46     unsigned char n_aux_syms;
47     };
48    
49    
50     /*
51     * file_load_ecoff():
52     *
53     * Loads an ecoff binary image into the emulated memory. The entry point
54     * (read from the ecoff header) is stored in the specified CPU's registers.
55     */
56     static void file_load_ecoff(struct machine *m, struct memory *mem,
57     char *filename, uint64_t *entrypointp,
58     int arch, uint64_t *gpp, int *byte_orderp)
59     {
60     struct ecoff_exechdr exechdr;
61     int f_magic, f_nscns, f_nsyms;
62     int a_magic;
63     off_t f_symptr, a_tsize, a_dsize, a_bsize;
64     uint64_t a_entry, a_tstart, a_dstart, a_bstart, a_gp, end_addr=0;
65     char *format_name;
66     struct ecoff_scnhdr scnhdr;
67     FILE *f;
68     int len, secn, total_len, chunk_size;
69     int encoding = ELFDATA2LSB; /* Assume little-endian. See below */
70     int program_byte_order = -1;
71     unsigned char buf[8192];
72    
73     f = fopen(filename, "r");
74     if (f == NULL) {
75     perror(filename);
76     exit(1);
77     }
78    
79     len = fread(&exechdr, 1, sizeof(exechdr), f);
80     if (len != sizeof(exechdr)) {
81     fprintf(stderr, " not a complete ecoff image\n");
82     exit(1);
83     }
84    
85     /*
86     * The following code looks a bit ugly, but it should work. The ECOFF
87     * 16-bit magic value seems to be stored in MSB byte order for
88     * big-endian binaries, and LSB byte order for little-endian binaries.
89     *
90     * The unencode() assumes little-endianness by default.
91     */
92     unencode(f_magic, &exechdr.f.f_magic, uint16_t);
93     switch (f_magic) {
94     case ((ECOFF_MAGIC_MIPSEB & 0xff) << 8) +
95     ((ECOFF_MAGIC_MIPSEB >> 8) & 0xff):
96     format_name = "MIPS1 BE";
97     encoding = ELFDATA2MSB;
98     break;
99     case ECOFF_MAGIC_MIPSEB:
100     /* NOTE: Big-endian header, little-endian code! */
101     format_name = "MIPS1 BE-LE";
102     encoding = ELFDATA2MSB;
103     program_byte_order = ELFDATA2LSB;
104     break;
105     case ECOFF_MAGIC_MIPSEL:
106     format_name = "MIPS1 LE";
107     encoding = ELFDATA2LSB;
108     break;
109     case ((ECOFF_MAGIC_MIPSEB2 & 0xff) << 8) +
110     ((ECOFF_MAGIC_MIPSEB2 >> 8) & 0xff):
111     format_name = "MIPS2 BE";
112     encoding = ELFDATA2MSB;
113     break;
114     case ECOFF_MAGIC_MIPSEL2:
115     format_name = "MIPS2 LE";
116     encoding = ELFDATA2LSB;
117     break;
118     case ((ECOFF_MAGIC_MIPSEB3 & 0xff) << 8) +
119     ((ECOFF_MAGIC_MIPSEB3 >> 8) & 0xff):
120     format_name = "MIPS3 BE";
121     encoding = ELFDATA2MSB;
122     break;
123     case ECOFF_MAGIC_MIPSEL3:
124     format_name = "MIPS3 LE";
125     encoding = ELFDATA2LSB;
126     break;
127     default:
128     fprintf(stderr, "%s: unimplemented ECOFF format, magic = "
129     "0x%04x\n", filename, (int)f_magic);
130     exit(1);
131     }
132    
133     /* Read various header information: */
134     unencode(f_nscns, &exechdr.f.f_nscns, uint16_t);
135     unencode(f_symptr, &exechdr.f.f_symptr, uint32_t);
136     unencode(f_nsyms, &exechdr.f.f_nsyms, uint32_t);
137     debug("ECOFF, %s, %i sections, %i symbols @ 0x%lx\n",
138     format_name, f_nscns, f_nsyms, (long)f_symptr);
139    
140     unencode(a_magic, &exechdr.a.magic, uint16_t);
141     unencode(a_tsize, &exechdr.a.tsize, uint32_t);
142     unencode(a_dsize, &exechdr.a.dsize, uint32_t);
143     unencode(a_bsize, &exechdr.a.bsize, uint32_t);
144     debug("magic 0x%04x, tsize 0x%x, dsize 0x%x, bsize 0x%x\n",
145     a_magic, (int)a_tsize, (int)a_dsize, (int)a_bsize);
146    
147     unencode(a_tstart, &exechdr.a.text_start, uint32_t);
148     unencode(a_dstart, &exechdr.a.data_start, uint32_t);
149     unencode(a_bstart, &exechdr.a.bss_start, uint32_t);
150     debug("text @ 0x%08x, data @ 0x%08x, bss @ 0x%08x\n",
151     (int)a_tstart, (int)a_dstart, (int)a_bstart);
152    
153     unencode(a_entry, &exechdr.a.entry, uint32_t);
154     unencode(a_gp, &exechdr.a.gp_value, uint32_t);
155     debug("entrypoint 0x%08x, gp = 0x%08x\n",
156     (int)a_entry, (int)a_gp);
157    
158     /*
159     * Special hack for a MACH/pmax kernel, I don't know how applicable
160     * this is for other files:
161     * there are no sections (!), and a_magic = 0x0108 instead of
162     * 0x0107 as it is on most other (E)COFF files I've seen.
163     *
164     * Then load everything after the header to the text start address.
165     */
166     if (f_nscns == 0 && a_magic == 0x108) {
167     uint64_t where = a_tstart;
168     total_len = 0;
169     fseek(f, 0x50, SEEK_SET);
170     while (!feof(f)) {
171     chunk_size = 256;
172     len = fread(buf, 1, chunk_size, f);
173    
174     if (len > 0)
175     m->cpus[0]->memory_rw(m->cpus[0], mem, where,
176     &buf[0], len, MEM_WRITE, NO_EXCEPTIONS);
177     where += len;
178     total_len += len;
179     }
180     debug("MACH/pmax hack (!), read 0x%x bytes\n", total_len);
181     }
182    
183     /* Go through all the section headers: */
184     for (secn=0; secn<f_nscns; secn++) {
185     off_t s_scnptr, s_relptr, s_lnnoptr, oldpos;
186     int s_nreloc, s_nlnno, s_flags;
187     int s_size;
188     unsigned int i;
189     uint64_t s_paddr, s_vaddr;
190    
191     /* Read a section header: */
192     len = fread(&scnhdr, 1, sizeof(scnhdr), f);
193     if (len != sizeof(scnhdr)) {
194     fprintf(stderr, "%s: incomplete section "
195     "header %i\n", filename, secn);
196     exit(1);
197     }
198    
199     /* Show the section name: */
200     debug("section ");
201     for (i=0; i<sizeof(scnhdr.s_name); i++)
202     if (scnhdr.s_name[i] >= 32 && scnhdr.s_name[i] < 127)
203     debug("%c", scnhdr.s_name[i]);
204     else
205     break;
206     debug(" (");
207    
208     unencode(s_paddr, &scnhdr.s_paddr, uint32_t);
209     unencode(s_vaddr, &scnhdr.s_vaddr, uint32_t);
210     unencode(s_size, &scnhdr.s_size, uint32_t);
211     unencode(s_scnptr, &scnhdr.s_scnptr, uint32_t);
212     unencode(s_relptr, &scnhdr.s_relptr, uint32_t);
213     unencode(s_lnnoptr, &scnhdr.s_lnnoptr, uint32_t);
214     unencode(s_nreloc, &scnhdr.s_nreloc, uint16_t);
215     unencode(s_nlnno, &scnhdr.s_nlnno, uint16_t);
216     unencode(s_flags, &scnhdr.s_flags, uint32_t);
217    
218     debug("0x%x @ 0x%08x, offset 0x%lx, flags 0x%x)\n",
219     (int)s_size, (int)s_vaddr, (long)s_scnptr, (int)s_flags);
220    
221     end_addr = s_vaddr + s_size;
222    
223     if (s_relptr != 0) {
224     /*
225     * TODO: Read this url, or similar:
226     * http://www.iecc.com/linker/linker07.html
227     */
228     fprintf(stderr, "%s: relocatable code/data in "
229     "section nr %i: not yet implemented\n",
230     filename, secn);
231     exit(1);
232     }
233    
234     /* Loadable? Then load the section: */
235     if (s_scnptr != 0 && s_size != 0 &&
236     s_vaddr != 0 && !(s_flags & 0x02)) {
237     /* Remember the current file offset: */
238     oldpos = ftello(f);
239    
240     /* Load the section into emulated memory: */
241     fseek(f, s_scnptr, SEEK_SET);
242     total_len = 0;
243     chunk_size = 1;
244     if ((s_vaddr & 0xf) == 0) chunk_size = 0x10;
245     if ((s_vaddr & 0xff) == 0) chunk_size = 0x100;
246     if ((s_vaddr & 0xfff) == 0) chunk_size = 0x1000;
247     while (total_len < s_size) {
248     len = chunk_size;
249     if (total_len + len > s_size)
250     len = s_size - total_len;
251     len = fread(buf, 1, chunk_size, f);
252     if (len == 0) {
253     debug("!!! total_len = %i, "
254     "chunk_size = %i, len = %i\n",
255     total_len, chunk_size, len);
256     break;
257     }
258    
259     m->cpus[0]->memory_rw(m->cpus[0], mem, s_vaddr,
260     &buf[0], len, MEM_WRITE, NO_EXCEPTIONS);
261     s_vaddr += len;
262     total_len += len;
263     }
264    
265     /* Return to position inside the section headers: */
266     fseek(f, oldpos, SEEK_SET);
267     }
268     }
269    
270     if (f_symptr != 0 && f_nsyms != 0) {
271     struct ecoff_symhdr symhdr;
272     int sym_magic, iextMax, issExtMax, issMax, crfd;
273     off_t cbRfdOffset, cbExtOffset, cbSsExtOffset, cbSsOffset;
274     char *symbol_data;
275     struct ecoff_extsym *extsyms;
276     int nsymbols, sym_nr;
277    
278     fseek(f, f_symptr, SEEK_SET);
279    
280     len = fread(&symhdr, 1, sizeof(symhdr), f);
281     if (len != sizeof(symhdr)) {
282     fprintf(stderr, "%s: not a complete "
283     "ecoff image: symhdr broken\n", filename);
284     exit(1);
285     }
286    
287     unencode(sym_magic, &symhdr.magic, uint16_t);
288     unencode(crfd, &symhdr.crfd, uint32_t);
289     unencode(cbRfdOffset, &symhdr.cbRfdOffset, uint32_t);
290     unencode(issMax, &symhdr.issMax, uint32_t);
291     unencode(cbSsOffset, &symhdr.cbSsOffset, uint32_t);
292     unencode(issExtMax, &symhdr.issExtMax, uint32_t);
293     unencode(cbSsExtOffset, &symhdr.cbSsExtOffset, uint32_t);
294     unencode(iextMax, &symhdr.iextMax, uint32_t);
295     unencode(cbExtOffset, &symhdr.cbExtOffset, uint32_t);
296    
297     if (sym_magic != MIPS_MAGIC_SYM) {
298     unsigned char *ms_sym_buf;
299     struct ms_sym *sym;
300     int n_real_symbols = 0;
301    
302     debug("bad symbol magic, assuming Microsoft format: ");
303    
304     /*
305     * See http://www.lisoleg.net/lisoleg/elfandlib/
306     * Microsoft%20Portable%20Executable%20COFF%20For
307     * mat%20Specification.txt
308     * for more details.
309     */
310 dpavlin 42 CHECK_ALLOCATION(ms_sym_buf =
311     malloc(sizeof(struct ms_sym) * f_nsyms));
312 dpavlin 38 fseek(f, f_symptr, SEEK_SET);
313     len = fread(ms_sym_buf, 1,
314     sizeof(struct ms_sym) * f_nsyms, f);
315     sym = (struct ms_sym *) ms_sym_buf;
316     for (sym_nr=0; sym_nr<f_nsyms; sym_nr++) {
317     char name[300];
318     uint32_t v, t, altname;
319     /* debug("sym %5i: '", sym_nr);
320     for (i=0; i<8 && sym->name[i]; i++)
321     debug("%c", sym->name[i]); */
322     v = sym->value[0] + (sym->value[1] << 8)
323     + (sym->value[2] << 16)
324     + ((uint64_t)sym->value[3] << 24);
325     altname = sym->name[4] + (sym->name[5] << 8)
326     + (sym->name[6] << 16)
327     + ((uint64_t)sym->name[3] << 24);
328     t = (sym->type[1] << 8) + sym->type[0];
329     /* TODO: big endian COFF? */
330     /* debug("' value=0x%x type=0x%04x", v, t); */
331    
332     if (t == 0x20 && sym->name[0]) {
333     memcpy(name, sym->name, 8);
334     name[8] = '\0';
335     add_symbol_name(&m->symbol_context,
336     v, 0, name, 0, -1);
337     n_real_symbols ++;
338     } else if (t == 0x20 && !sym->name[0]) {
339     off_t ofs;
340     ofs = f_symptr + altname +
341     sizeof(struct ms_sym) * f_nsyms;
342     fseek(f, ofs, SEEK_SET);
343     fread(name, 1, sizeof(name), f);
344     name[sizeof(name)-1] = '\0';
345     /* debug(" [altname=0x%x '%s']",
346     altname, name); */
347     add_symbol_name(&m->symbol_context,
348     v, 0, name, 0, -1);
349     n_real_symbols ++;
350     }
351    
352    
353     if (sym->n_aux_syms) {
354     int n = sym->n_aux_syms;
355     /* debug(" aux='"); */
356     while (n-- > 0) {
357     sym ++; sym_nr ++;
358     /* for (i=0; i<8 &&
359     sym->name[i]; i++)
360     debug("%c",
361     sym->name[i]); */
362     }
363     /* debug("'"); */
364     }
365     /* debug("\n"); */
366     sym ++;
367     }
368    
369     debug("%i symbols\n", n_real_symbols);
370     free(ms_sym_buf);
371    
372     goto skip_normal_coff_symbols;
373     }
374    
375     debug("symbol header: magic = 0x%x\n", sym_magic);
376    
377     debug("%i symbols @ 0x%08x (strings @ 0x%08x)\n",
378     iextMax, cbExtOffset, cbSsExtOffset);
379    
380 dpavlin 42 CHECK_ALLOCATION(symbol_data = malloc(issExtMax + 2));
381 dpavlin 38 memset(symbol_data, 0, issExtMax + 2);
382     fseek(f, cbSsExtOffset, SEEK_SET);
383     fread(symbol_data, 1, issExtMax + 1, f);
384    
385     nsymbols = iextMax;
386    
387 dpavlin 42 CHECK_ALLOCATION(extsyms =
388     malloc(iextMax * sizeof(struct ecoff_extsym)));
389 dpavlin 38 memset(extsyms, 0, iextMax * sizeof(struct ecoff_extsym));
390     fseek(f, cbExtOffset, SEEK_SET);
391     fread(extsyms, 1, iextMax * sizeof(struct ecoff_extsym), f);
392    
393     /* Unencode the strindex and value first: */
394     for (sym_nr=0; sym_nr<nsymbols; sym_nr++) {
395     uint64_t value, strindex;
396    
397     unencode(strindex, &extsyms[sym_nr].es_strindex,
398     uint32_t);
399     unencode(value, &extsyms[sym_nr].es_value, uint32_t);
400    
401     extsyms[sym_nr].es_strindex = strindex;
402     extsyms[sym_nr].es_value = value;
403     }
404    
405     for (sym_nr=0; sym_nr<nsymbols; sym_nr++) {
406     /* debug("symbol%6i: 0x%08x = %s\n",
407     sym_nr, (int)extsyms[sym_nr].es_value,
408     symbol_data + extsyms[sym_nr].es_strindex); */
409    
410     add_symbol_name(&m->symbol_context,
411     extsyms[sym_nr].es_value, 0,
412     symbol_data + extsyms[sym_nr].es_strindex, 0, -1);
413     }
414    
415     free(extsyms);
416     free(symbol_data);
417    
418     skip_normal_coff_symbols:
419     ;
420     }
421    
422     fclose(f);
423    
424     *entrypointp = a_entry;
425     *gpp = a_gp;
426     m->file_loaded_end_addr = end_addr;
427    
428     if (program_byte_order != -1)
429     encoding = program_byte_order;
430    
431     if (encoding == ELFDATA2LSB)
432     *byte_orderp = EMUL_LITTLE_ENDIAN;
433     else
434     *byte_orderp = EMUL_BIG_ENDIAN;
435    
436     n_executables_loaded ++;
437     }
438    
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