/[gxemul]/trunk/src/file/file_macho.c
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Contents of /trunk/src/file/file_macho.c

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Revision 42 - (show annotations)
Mon Oct 8 16:22:32 2007 UTC (16 years, 6 months ago) by dpavlin
File MIME type: text/plain
File size: 8507 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 /*
2 * Copyright (C) 2005-2007 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 * $Id: file_macho.c,v 1.2 2007/06/15 17:02:39 debug Exp $
29 *
30 * Mach-O file support.
31 */
32
33 /* Note: Included from file.c. */
34
35
36 /*
37 * file_load_macho():
38 *
39 * Loads a Mach-O binary image into the emulated memory. The entry point
40 * is stored in the specified CPU's registers.
41 *
42 * TODO:
43 *
44 * o) Almost everything.
45 *
46 * o) I haven't had time to look into whether Apple's open source
47 * license is BSD-compatible or not. Perhaps it would be possible
48 * to use a header file containing symbolic names, and not use
49 * hardcoded values.
50 */
51 static void file_load_macho(struct machine *m, struct memory *mem,
52 char *filename, uint64_t *entrypointp, int arch, int *byte_orderp,
53 int is_64bit, int is_reversed)
54 {
55 FILE *f;
56 uint64_t entry = 0;
57 int entry_set = 0;
58 int encoding = ELFDATA2MSB;
59 unsigned char buf[65536];
60 char *symbols, *strings;
61 uint32_t cputype, cpusubtype, filetype, ncmds, sizeofcmds, flags;
62 uint64_t vmaddr, vmsize, fileoff, filesize;
63 int cmd_type, cmd_len, i, flavor;
64 int32_t symoff, nsyms, stroff, strsize;
65 size_t len, pos;
66
67 if (m->cpus[0]->byte_order == EMUL_BIG_ENDIAN)
68 encoding = ELFDATA2MSB;
69
70 f = fopen(filename, "r");
71 if (f == NULL) {
72 perror(filename);
73 exit(1);
74 }
75
76 if (is_64bit) {
77 fatal("TODO: 64-bit Mach-O. Not supported yet.\n");
78 exit(1);
79 }
80 if (is_reversed) {
81 fatal("TODO: Reversed-endianness. Not supported yet.\n");
82 exit(1);
83 }
84
85 len = fread(buf, 1, sizeof(buf), f);
86 if (len < 100) {
87 fatal("Bad Mach-O file?\n");
88 exit(1);
89 }
90
91 unencode(cputype, &buf[4], uint32_t);
92 unencode(cpusubtype, &buf[8], uint32_t);
93 unencode(filetype, &buf[12], uint32_t);
94 unencode(ncmds, &buf[16], uint32_t);
95 unencode(sizeofcmds, &buf[20], uint32_t);
96 unencode(flags, &buf[24], uint32_t);
97
98 /* debug("cputype=0x%x cpusubtype=0x%x filetype=0x%x\n",
99 cputype, cpusubtype, filetype);
100 debug("ncmds=%i sizeofcmds=0x%08x flags=0x%08x\n",
101 ncmds, sizeofcmds, flags); */
102
103 /*
104 * Compare to "normal" values.
105 * NOTE/TODO: These were for a Darwin (Macintosh PPC) kernel.
106 */
107 if (cputype != 0x12) {
108 fatal("Error: Unimplemented cputype 0x%x\n", cputype);
109 exit(1);
110 }
111 if (cpusubtype != 0) {
112 fatal("Error: Unimplemented cpusubtype 0x%x\n", cpusubtype);
113 exit(1);
114 }
115 /* Filetype 2 means an executable image. */
116 if (filetype != 2) {
117 fatal("Error: Unimplemented filetype 0x%x\n", filetype);
118 exit(1);
119 }
120 if (!(flags & 1)) {
121 fatal("Error: File has 'undefined references'. Cannot"
122 " be executed.\n", flags);
123 exit(1);
124 }
125
126 /* I've only encountered flags == 1 so far. */
127 if (flags != 1) {
128 fatal("Error: Unimplemented flags 0x%x\n", flags);
129 exit(1);
130 }
131
132 /*
133 * Read all load commands:
134 */
135 pos = is_64bit? 32 : 28;
136 cmd_type = 0;
137 do {
138 /* Read command type and length: */
139 unencode(cmd_type, &buf[pos], uint32_t);
140 unencode(cmd_len, &buf[pos+4], uint32_t);
141
142 #if 0
143 debug("cmd %i, len=%i\n", cmd_type, cmd_len);
144 for (i=8; i<cmd_len; i++) {
145 unsigned char ch = buf[pos+i];
146 if (ch >= ' ' && ch < 127)
147 debug("%c", ch);
148 else
149 debug(".");
150 }
151 #endif
152 switch (cmd_type) {
153 case 1: /* LC_SEGMENT */
154 debug("seg ");
155 for (i=0; i<16; i++) {
156 if (buf[pos + 8 + i] == 0)
157 break;
158 debug("%c", buf[pos + 8 + i]);
159 }
160 unencode(vmaddr, &buf[pos+8+16+0], uint32_t);
161 unencode(vmsize, &buf[pos+8+16+4], uint32_t);
162 unencode(fileoff, &buf[pos+8+16+8], uint32_t);
163 unencode(filesize, &buf[pos+8+16+12], uint32_t);
164 debug(": vmaddr=0x%x size=0x%x fileoff=0x%x",
165 (int)vmaddr, (int)vmsize, (int)fileoff);
166
167 if (filesize == 0) {
168 debug("\n");
169 break;
170 }
171
172 fseek(f, fileoff, SEEK_SET);
173
174 /* Load data from the file: */
175 while (filesize != 0) {
176 unsigned char buf[32768];
177 ssize_t len = filesize > sizeof(buf) ?
178 sizeof(buf) : filesize;
179 len = fread(buf, 1, len, f);
180
181 /* printf("fread len=%i vmaddr=%x buf[0..]="
182 "%02x %02x %02x\n", (int)len, (int)vmaddr,
183 buf[0], buf[1], buf[2]); */
184
185 if (len > 0) {
186 int len2 = 0;
187 uint64_t vaddr1 = vmaddr &
188 ((1 << BITS_PER_MEMBLOCK) - 1);
189 uint64_t vaddr2 = (vmaddr +
190 len) & ((1 << BITS_PER_MEMBLOCK)-1);
191 if (vaddr2 < vaddr1) {
192 len2 = len - vaddr2;
193 m->cpus[0]->memory_rw(m->cpus[
194 0], mem, vmaddr, &buf[0],
195 len2, MEM_WRITE,
196 NO_EXCEPTIONS);
197 }
198 m->cpus[0]->memory_rw(m->cpus[0], mem,
199 vmaddr + len2, &buf[len2], len-len2,
200 MEM_WRITE, NO_EXCEPTIONS);
201 } else {
202 fprintf(stderr, "error reading\n");
203 exit(1);
204 }
205
206 vmaddr += len;
207 filesize -= len;
208 }
209
210 debug("\n");
211 break;
212
213 case 2: /* LC_SYMTAB */
214 unencode(symoff, &buf[pos+8], uint32_t);
215 unencode(nsyms, &buf[pos+12], uint32_t);
216 unencode(stroff, &buf[pos+16], uint32_t);
217 unencode(strsize, &buf[pos+20], uint32_t);
218 debug("symtable: %i symbols @ 0x%x (strings at "
219 "0x%x)\n", nsyms, symoff, stroff);
220
221 CHECK_ALLOCATION(symbols = malloc(12 * nsyms));
222 fseek(f, symoff, SEEK_SET);
223 fread(symbols, 1, 12 * nsyms, f);
224
225 CHECK_ALLOCATION(strings = malloc(strsize));
226 fseek(f, stroff, SEEK_SET);
227 fread(strings, 1, strsize, f);
228
229 for (i=0; i<nsyms; i++) {
230 int n_strx, n_type, n_sect, n_desc;
231 uint32_t n_value;
232 unencode(n_strx, &symbols[i*12+0], int32_t);
233 unencode(n_type, &symbols[i*12+4], uint8_t);
234 unencode(n_sect, &symbols[i*12+5], uint8_t);
235 unencode(n_desc, &symbols[i*12+6], int16_t);
236 unencode(n_value, &symbols[i*12+8], uint32_t);
237 /* debug("%i: strx=%i type=%i sect=%i desc=%i"
238 " value=0x%x\n", i, n_strx, n_type,
239 n_sect, n_desc, n_value); */
240 add_symbol_name(&m->symbol_context,
241 n_value, 0, strings + n_strx, 0, -1);
242 }
243
244 free(symbols);
245 free(strings);
246 break;
247
248 case 5: debug("unix thread context: ");
249 /* See http://cvs.sf.net/viewcvs.py/hte/
250 HT%20Editor/machostruc.h or similar for details
251 on the thread struct. */
252 unencode(flavor, &buf[pos+8], uint32_t);
253 if (flavor != 1) {
254 fatal("unimplemented flavor %i\n", flavor);
255 exit(1);
256 }
257
258 if (arch != ARCH_PPC) {
259 fatal("non-PPC arch? TODO\n");
260 exit(1);
261 }
262
263 unencode(entry, &buf[pos+16], uint32_t);
264 entry_set = 1;
265 debug("pc=0x%x\n", (int)entry);
266
267 for (i=1; i<40; i++) {
268 uint32_t x;
269 unencode(x, &buf[pos+16+i*4], uint32_t);
270 if (x != 0) {
271 fatal("Entry nr %i in the Mach-O"
272 " thread struct is non-zero"
273 " (0x%x). This is not supported"
274 " yet. TODO\n", i, x);
275 exit(1);
276 }
277 }
278 break;
279
280 default:fatal("WARNING! Unimplemented load command %i!\n",
281 cmd_type);
282 }
283
284 pos += cmd_len;
285 } while (pos < sizeofcmds && cmd_type != 0);
286
287 fclose(f);
288
289 if (!entry_set) {
290 fatal("No entry point? Aborting.\n");
291 exit(1);
292 }
293
294 *entrypointp = entry;
295
296 if (encoding == ELFDATA2LSB)
297 *byte_orderp = EMUL_LITTLE_ENDIAN;
298 else
299 *byte_orderp = EMUL_BIG_ENDIAN;
300
301 n_executables_loaded ++;
302 }
303
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