| 1 |
/* |
| 2 |
* Copyright (C) 2003-2007 Anders Gavare. All rights reserved. |
| 3 |
* |
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* Redistribution and use in source and binary forms, with or without |
| 5 |
* modification, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
| 8 |
* notice, this list of conditions and the following disclaimer. |
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* 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. |
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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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* 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 |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* |
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* $Id: file_ecoff.c,v 1.3 2007/06/17 23:32:20 debug Exp $ |
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* |
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* COMMENT: ECOFF file support |
| 31 |
*/ |
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|
| 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(): |
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* |
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* 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; |
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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]; |
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|
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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 |
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* big-endian binaries, and LSB byte order for little-endian binaries. |
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* |
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* The unencode() assumes little-endianness by default. |
| 91 |
*/ |
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unencode(f_magic, &exechdr.f.f_magic, uint16_t); |
| 93 |
switch (f_magic) { |
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case ((ECOFF_MAGIC_MIPSEB & 0xff) << 8) + |
| 95 |
((ECOFF_MAGIC_MIPSEB >> 8) & 0xff): |
| 96 |
format_name = "MIPS1 BE"; |
| 97 |
encoding = ELFDATA2MSB; |
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break; |
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case ECOFF_MAGIC_MIPSEB: |
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/* NOTE: Big-endian header, little-endian code! */ |
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format_name = "MIPS1 BE-LE"; |
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encoding = ELFDATA2MSB; |
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program_byte_order = ELFDATA2LSB; |
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break; |
| 105 |
case ECOFF_MAGIC_MIPSEL: |
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format_name = "MIPS1 LE"; |
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encoding = ELFDATA2LSB; |
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break; |
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case ((ECOFF_MAGIC_MIPSEB2 & 0xff) << 8) + |
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((ECOFF_MAGIC_MIPSEB2 >> 8) & 0xff): |
| 111 |
format_name = "MIPS2 BE"; |
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encoding = ELFDATA2MSB; |
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break; |
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case ECOFF_MAGIC_MIPSEL2: |
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format_name = "MIPS2 LE"; |
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encoding = ELFDATA2LSB; |
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break; |
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case ((ECOFF_MAGIC_MIPSEB3 & 0xff) << 8) + |
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((ECOFF_MAGIC_MIPSEB3 >> 8) & 0xff): |
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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: */ |
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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", |
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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", |
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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", |
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(int)a_tstart, (int)a_dstart, (int)a_bstart); |
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|
| 153 |
unencode(a_entry, &exechdr.a.entry, uint32_t); |
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unencode(a_gp, &exechdr.a.gp_value, uint32_t); |
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debug("entrypoint 0x%08x, gp = 0x%08x\n", |
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(int)a_entry, (int)a_gp); |
| 157 |
|
| 158 |
/* |
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* Special hack for a MACH/pmax kernel, I don't know how applicable |
| 160 |
* this is for other files: |
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* 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 |
* |
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* 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++) { |
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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); |
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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 |
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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", |
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(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 |
CHECK_ALLOCATION(ms_sym_buf = |
| 311 |
malloc(sizeof(struct ms_sym) * f_nsyms)); |
| 312 |
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 |
CHECK_ALLOCATION(symbol_data = malloc(issExtMax + 2)); |
| 381 |
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 |
CHECK_ALLOCATION(extsyms = |
| 388 |
malloc(iextMax * sizeof(struct ecoff_extsym))); |
| 389 |
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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