Commit | Line | Data |
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f6bcefef | 1 | /* Main simulator entry points specific to the CRIS. |
3666a048 | 2 | Copyright (C) 2004-2021 Free Software Foundation, Inc. |
f6bcefef HPN |
3 | Contributed by Axis Communications. |
4 | ||
5 | This file is part of the GNU simulators. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
4744ac1b JB |
9 | the Free Software Foundation; either version 3 of the License, or |
10 | (at your option) any later version. | |
f6bcefef HPN |
11 | |
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
4744ac1b JB |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
f6bcefef HPN |
19 | |
20 | /* Based on the fr30 file, mixing in bits from the i960 and pruning of | |
21 | dead code. */ | |
22 | ||
a6ff997c | 23 | #include "config.h" |
f6bcefef HPN |
24 | #include "libiberty.h" |
25 | #include "bfd.h" | |
80e5c09e | 26 | #include "elf-bfd.h" |
f6bcefef HPN |
27 | |
28 | #include "sim-main.h" | |
29 | #ifdef HAVE_STDLIB_H | |
30 | #include <stdlib.h> | |
31 | #endif | |
c10b3605 | 32 | #include <errno.h> |
f6bcefef HPN |
33 | #include "sim-options.h" |
34 | #include "dis-asm.h" | |
35 | ||
36 | /* Apparently the autoconf bits are missing (though HAVE_ENVIRON is used | |
37 | in other dirs; also lacking there). Patch around it for major systems. */ | |
38 | #if defined (HAVE_ENVIRON) || defined (__GLIBC__) | |
39 | extern char **environ; | |
40 | #define GET_ENVIRON() environ | |
41 | #else | |
42 | char *missing_environ[] = { "SHELL=/bin/sh", "PATH=/bin:/usr/bin", NULL }; | |
43 | #define GET_ENVIRON() missing_environ | |
44 | #endif | |
45 | ||
f6bcefef HPN |
46 | /* Used with get_progbounds to find out how much memory is needed for the |
47 | program. We don't want to allocate more, since that could mask | |
48 | invalid memory accesses program bugs. */ | |
49 | struct progbounds { | |
50 | USI startmem; | |
51 | USI endmem; | |
80e5c09e HPN |
52 | USI end_loadmem; |
53 | USI start_nonloadmem; | |
f6bcefef HPN |
54 | }; |
55 | ||
56 | static void free_state (SIM_DESC); | |
80e5c09e | 57 | static void get_progbounds_iterator (bfd *, asection *, void *); |
f6bcefef HPN |
58 | static SIM_RC cris_option_handler (SIM_DESC, sim_cpu *, int, char *, int); |
59 | ||
60 | /* Since we don't build the cgen-opcode table, we use the old | |
61 | disassembler. */ | |
62 | static CGEN_DISASSEMBLER cris_disassemble_insn; | |
63 | ||
64 | /* By default, we set up stack and environment variables like the Linux | |
65 | kernel. */ | |
66 | static char cris_bare_iron = 0; | |
67 | ||
68 | /* Whether 0x9000000xx have simulator-specific meanings. */ | |
aad3b3cb | 69 | char cris_have_900000xxif = 0; |
f6bcefef | 70 | |
c10b3605 HPN |
71 | /* Used to optionally override the default start address of the |
72 | simulation. */ | |
73 | static USI cris_start_address = 0xffffffffu; | |
74 | ||
75 | /* Used to optionally add offsets to the loaded image and its start | |
76 | address. (Not used for the interpreter of dynamically loaded | |
77 | programs or the DSO:s.) */ | |
78 | static int cris_program_offset = 0; | |
79 | ||
466b1d33 HPN |
80 | /* What to do when we face a more or less unknown syscall. */ |
81 | enum cris_unknown_syscall_action_type cris_unknown_syscall_action | |
82 | = CRIS_USYSC_MSG_STOP; | |
83 | ||
f6bcefef HPN |
84 | /* CRIS-specific options. */ |
85 | typedef enum { | |
86 | OPTION_CRIS_STATS = OPTION_START, | |
87 | OPTION_CRIS_TRACE, | |
88 | OPTION_CRIS_NAKED, | |
c10b3605 HPN |
89 | OPTION_CRIS_PROGRAM_OFFSET, |
90 | OPTION_CRIS_STARTADDR, | |
f6bcefef | 91 | OPTION_CRIS_900000XXIF, |
466b1d33 | 92 | OPTION_CRIS_UNKNOWN_SYSCALL |
f6bcefef HPN |
93 | } CRIS_OPTIONS; |
94 | ||
95 | static const OPTION cris_options[] = | |
96 | { | |
97 | { {"cris-cycles", required_argument, NULL, OPTION_CRIS_STATS}, | |
98 | '\0', "basic|unaligned|schedulable|all", | |
99 | "Dump execution statistics", | |
100 | cris_option_handler, NULL }, | |
101 | { {"cris-trace", required_argument, NULL, OPTION_CRIS_TRACE}, | |
102 | '\0', "basic", | |
103 | "Emit trace information while running", | |
104 | cris_option_handler, NULL }, | |
105 | { {"cris-naked", no_argument, NULL, OPTION_CRIS_NAKED}, | |
106 | '\0', NULL, "Don't set up stack and environment", | |
107 | cris_option_handler, NULL }, | |
108 | { {"cris-900000xx", no_argument, NULL, OPTION_CRIS_900000XXIF}, | |
109 | '\0', NULL, "Define addresses at 0x900000xx with simulator semantics", | |
110 | cris_option_handler, NULL }, | |
466b1d33 HPN |
111 | { {"cris-unknown-syscall", required_argument, NULL, |
112 | OPTION_CRIS_UNKNOWN_SYSCALL}, | |
113 | '\0', "stop|enosys|enosys-quiet", "Action at an unknown system call", | |
114 | cris_option_handler, NULL }, | |
c10b3605 HPN |
115 | { {"cris-program-offset", required_argument, NULL, |
116 | OPTION_CRIS_PROGRAM_OFFSET}, | |
117 | '\0', "OFFSET", | |
118 | "Offset image addresses and default start address of a program", | |
119 | cris_option_handler }, | |
120 | { {"cris-start-address", required_argument, NULL, OPTION_CRIS_STARTADDR}, | |
121 | '\0', "ADDRESS", "Set start address", | |
122 | cris_option_handler }, | |
f6bcefef HPN |
123 | { {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL, NULL } |
124 | }; | |
125 | \f | |
f6bcefef HPN |
126 | /* Handle CRIS-specific options. */ |
127 | ||
128 | static SIM_RC | |
129 | cris_option_handler (SIM_DESC sd, sim_cpu *cpu ATTRIBUTE_UNUSED, int opt, | |
130 | char *arg, int is_command ATTRIBUTE_UNUSED) | |
131 | { | |
132 | /* The options are CRIS-specific, but cpu-specific option-handling is | |
133 | broken; required to being with "--cpu0-". We store the flags in an | |
134 | unused field in the global state structure and move the flags over | |
135 | to the module-specific CPU data when we store things in the | |
136 | cpu-specific structure. */ | |
137 | char *tracefp = STATE_TRACE_FLAGS (sd); | |
c10b3605 | 138 | char *chp = arg; |
f6bcefef HPN |
139 | |
140 | switch ((CRIS_OPTIONS) opt) | |
141 | { | |
142 | case OPTION_CRIS_STATS: | |
143 | if (strcmp (arg, "basic") == 0) | |
144 | *tracefp = FLAG_CRIS_MISC_PROFILE_SIMPLE; | |
145 | else if (strcmp (arg, "unaligned") == 0) | |
146 | *tracefp | |
147 | = (FLAG_CRIS_MISC_PROFILE_UNALIGNED | |
148 | | FLAG_CRIS_MISC_PROFILE_SIMPLE); | |
149 | else if (strcmp (arg, "schedulable") == 0) | |
150 | *tracefp | |
151 | = (FLAG_CRIS_MISC_PROFILE_SCHEDULABLE | |
152 | | FLAG_CRIS_MISC_PROFILE_SIMPLE); | |
153 | else if (strcmp (arg, "all") == 0) | |
154 | *tracefp = FLAG_CRIS_MISC_PROFILE_ALL; | |
155 | else | |
156 | { | |
466b1d33 HPN |
157 | /* Beware; the framework does not handle the error case; |
158 | we have to do it ourselves. */ | |
159 | sim_io_eprintf (sd, "Unknown option `--cris-cycles=%s'\n", arg); | |
f6bcefef HPN |
160 | return SIM_RC_FAIL; |
161 | } | |
162 | break; | |
163 | ||
164 | case OPTION_CRIS_TRACE: | |
165 | if (strcmp (arg, "basic") == 0) | |
166 | *tracefp |= FLAG_CRIS_MISC_PROFILE_XSIM_TRACE; | |
167 | else | |
168 | { | |
169 | sim_io_eprintf (sd, "Unknown option `--cris-trace=%s'\n", arg); | |
170 | return SIM_RC_FAIL; | |
171 | } | |
172 | break; | |
173 | ||
174 | case OPTION_CRIS_NAKED: | |
175 | cris_bare_iron = 1; | |
176 | break; | |
177 | ||
178 | case OPTION_CRIS_900000XXIF: | |
179 | cris_have_900000xxif = 1; | |
180 | break; | |
181 | ||
c10b3605 HPN |
182 | case OPTION_CRIS_STARTADDR: |
183 | errno = 0; | |
184 | cris_start_address = (USI) strtoul (chp, &chp, 0); | |
185 | ||
186 | if (errno != 0 || *chp != 0) | |
187 | { | |
188 | sim_io_eprintf (sd, "Invalid option `--cris-start-address=%s'\n", | |
189 | arg); | |
190 | return SIM_RC_FAIL; | |
191 | } | |
192 | break; | |
193 | ||
194 | case OPTION_CRIS_PROGRAM_OFFSET: | |
195 | errno = 0; | |
196 | cris_program_offset = (int) strtol (chp, &chp, 0); | |
197 | ||
198 | if (errno != 0 || *chp != 0) | |
199 | { | |
200 | sim_io_eprintf (sd, "Invalid option `--cris-program-offset=%s'\n", | |
201 | arg); | |
202 | return SIM_RC_FAIL; | |
203 | } | |
204 | break; | |
205 | ||
466b1d33 HPN |
206 | case OPTION_CRIS_UNKNOWN_SYSCALL: |
207 | if (strcmp (arg, "enosys") == 0) | |
208 | cris_unknown_syscall_action = CRIS_USYSC_MSG_ENOSYS; | |
209 | else if (strcmp (arg, "enosys-quiet") == 0) | |
210 | cris_unknown_syscall_action = CRIS_USYSC_QUIET_ENOSYS; | |
211 | else if (strcmp (arg, "stop") == 0) | |
212 | cris_unknown_syscall_action = CRIS_USYSC_MSG_STOP; | |
213 | else | |
214 | { | |
215 | sim_io_eprintf (sd, "Unknown option `--cris-unknown-syscall=%s'\n", | |
216 | arg); | |
217 | return SIM_RC_FAIL; | |
218 | } | |
219 | break; | |
220 | ||
f6bcefef HPN |
221 | default: |
222 | /* We'll actually never get here; the caller handles the error | |
223 | case. */ | |
224 | sim_io_eprintf (sd, "Unknown option `%s'\n", arg); | |
225 | return SIM_RC_FAIL; | |
226 | } | |
227 | ||
228 | /* Imply --profile-model=on. */ | |
229 | return sim_profile_set_option (sd, "-model", PROFILE_MODEL_IDX, "on"); | |
230 | } | |
231 | ||
80e5c09e HPN |
232 | /* An ELF-specific simplified ../common/sim-load.c:sim_load_file, |
233 | using the program headers, not sections, in order to make sure that | |
234 | the program headers themeselves are also loaded. The caller is | |
235 | responsible for asserting that ABFD is an ELF file. */ | |
236 | ||
237 | static bfd_boolean | |
238 | cris_load_elf_file (SIM_DESC sd, struct bfd *abfd, sim_write_fn do_write) | |
239 | { | |
240 | Elf_Internal_Phdr *phdr; | |
241 | int n_hdrs; | |
242 | int i; | |
243 | bfd_boolean verbose = STATE_OPEN_KIND (sd) == SIM_OPEN_DEBUG; | |
80e5c09e HPN |
244 | |
245 | phdr = elf_tdata (abfd)->phdr; | |
246 | n_hdrs = elf_elfheader (abfd)->e_phnum; | |
247 | ||
248 | /* We're only interested in PT_LOAD; all necessary information | |
249 | should be covered by that. */ | |
250 | for (i = 0; i < n_hdrs; i++) | |
251 | { | |
252 | bfd_byte *buf; | |
253 | bfd_vma lma = STATE_LOAD_AT_LMA_P (sd) | |
254 | ? phdr[i].p_paddr : phdr[i].p_vaddr; | |
255 | ||
256 | if (phdr[i].p_type != PT_LOAD) | |
257 | continue; | |
258 | ||
259 | buf = xmalloc (phdr[i].p_filesz); | |
260 | ||
261 | if (verbose) | |
b3fbb288 MF |
262 | sim_io_printf (sd, "Loading segment at 0x%lx, size 0x%lx\n", |
263 | lma, phdr[i].p_filesz); | |
80e5c09e HPN |
264 | |
265 | if (bfd_seek (abfd, phdr[i].p_offset, SEEK_SET) != 0 | |
266 | || (bfd_bread (buf, phdr[i].p_filesz, abfd) != phdr[i].p_filesz)) | |
267 | { | |
b3fbb288 MF |
268 | sim_io_eprintf (sd, |
269 | "%s: could not read segment at 0x%lx, size 0x%lx\n", | |
270 | STATE_MY_NAME (sd), lma, phdr[i].p_filesz); | |
80e5c09e HPN |
271 | free (buf); |
272 | return FALSE; | |
273 | } | |
274 | ||
275 | if (do_write (sd, lma, buf, phdr[i].p_filesz) != phdr[i].p_filesz) | |
276 | { | |
b3fbb288 MF |
277 | sim_io_eprintf (sd, |
278 | "%s: could not load segment at 0x%lx, size 0x%lx\n", | |
279 | STATE_MY_NAME (sd), lma, phdr[i].p_filesz); | |
80e5c09e HPN |
280 | free (buf); |
281 | return FALSE; | |
282 | } | |
283 | ||
284 | free (buf); | |
285 | } | |
286 | ||
287 | return TRUE; | |
288 | } | |
289 | ||
f6bcefef HPN |
290 | /* Cover function of sim_state_free to free the cpu buffers as well. */ |
291 | ||
292 | static void | |
293 | free_state (SIM_DESC sd) | |
294 | { | |
295 | if (STATE_MODULES (sd) != NULL) | |
296 | sim_module_uninstall (sd); | |
297 | sim_cpu_free_all (sd); | |
298 | sim_state_free (sd); | |
299 | } | |
300 | ||
c10b3605 HPN |
301 | /* Helper struct for cris_set_section_offset_iterator. */ |
302 | ||
303 | struct offsetinfo | |
304 | { | |
305 | SIM_DESC sd; | |
306 | int offset; | |
307 | }; | |
308 | ||
309 | /* BFD section iterator to offset the LMA and VMA. */ | |
310 | ||
311 | static void | |
312 | cris_set_section_offset_iterator (bfd *abfd, asection *s, void *vp) | |
313 | { | |
314 | struct offsetinfo *p = (struct offsetinfo *) vp; | |
315 | SIM_DESC sd = p->sd; | |
316 | int offset = p->offset; | |
317 | ||
fd361982 | 318 | if ((bfd_section_flags (s) & SEC_ALLOC)) |
c10b3605 | 319 | { |
fd361982 | 320 | bfd_vma vma = bfd_section_vma (s); |
c10b3605 | 321 | |
fd361982 | 322 | bfd_set_section_vma (s, vma + offset); |
c10b3605 HPN |
323 | } |
324 | ||
325 | /* This seems clumsy and inaccurate, but let's stick to doing it the | |
326 | same way as sim_analyze_program for consistency. */ | |
fd361982 AM |
327 | if (strcmp (bfd_section_name (s), ".text") == 0) |
328 | STATE_TEXT_START (sd) = bfd_section_vma (s); | |
c10b3605 HPN |
329 | } |
330 | ||
331 | /* Adjust the start-address, LMA and VMA of a SD. Must be called | |
332 | after sim_analyze_program. */ | |
333 | ||
334 | static void | |
335 | cris_offset_sections (SIM_DESC sd, int offset) | |
336 | { | |
337 | bfd_boolean ret; | |
338 | struct bfd *abfd = STATE_PROG_BFD (sd); | |
339 | asection *text; | |
340 | struct offsetinfo oi; | |
341 | ||
342 | /* Only happens for usage error. */ | |
343 | if (abfd == NULL) | |
344 | return; | |
345 | ||
346 | oi.sd = sd; | |
347 | oi.offset = offset; | |
348 | ||
349 | bfd_map_over_sections (abfd, cris_set_section_offset_iterator, &oi); | |
350 | ret = bfd_set_start_address (abfd, bfd_get_start_address (abfd) + offset); | |
351 | ||
352 | STATE_START_ADDR (sd) = bfd_get_start_address (abfd); | |
353 | } | |
354 | ||
80e5c09e HPN |
355 | /* BFD section iterator to find the highest and lowest allocated and |
356 | non-allocated section addresses (plus one). */ | |
f6bcefef | 357 | |
80e5c09e HPN |
358 | static void |
359 | get_progbounds_iterator (bfd *abfd ATTRIBUTE_UNUSED, asection *s, void *vp) | |
f6bcefef HPN |
360 | { |
361 | struct progbounds *pbp = (struct progbounds *) vp; | |
362 | ||
fd361982 | 363 | if ((bfd_section_flags (s) & SEC_ALLOC)) |
f6bcefef | 364 | { |
fd361982 AM |
365 | bfd_size_type sec_size = bfd_section_size (s); |
366 | bfd_size_type sec_start = bfd_section_vma (s); | |
f6bcefef HPN |
367 | bfd_size_type sec_end = sec_start + sec_size; |
368 | ||
369 | if (sec_end > pbp->endmem) | |
370 | pbp->endmem = sec_end; | |
371 | ||
372 | if (sec_start < pbp->startmem) | |
373 | pbp->startmem = sec_start; | |
80e5c09e | 374 | |
fd361982 | 375 | if ((bfd_section_flags (s) & SEC_LOAD)) |
80e5c09e HPN |
376 | { |
377 | if (sec_end > pbp->end_loadmem) | |
378 | pbp->end_loadmem = sec_end; | |
379 | } | |
380 | else if (sec_start < pbp->start_nonloadmem) | |
381 | pbp->start_nonloadmem = sec_start; | |
382 | } | |
383 | } | |
384 | ||
385 | /* Get the program boundaries. Because not everything is covered by | |
386 | sections in ELF, notably the program headers, we use the program | |
387 | headers instead. */ | |
388 | ||
389 | static void | |
390 | cris_get_progbounds (struct bfd *abfd, struct progbounds *pbp) | |
391 | { | |
392 | Elf_Internal_Phdr *phdr; | |
393 | int n_hdrs; | |
394 | int i; | |
395 | ||
396 | pbp->startmem = 0xffffffff; | |
397 | pbp->endmem = 0; | |
398 | pbp->end_loadmem = 0; | |
399 | pbp->start_nonloadmem = 0xffffffff; | |
400 | ||
401 | /* In case we're ever used for something other than ELF, use the | |
402 | generic method. */ | |
403 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
404 | { | |
405 | bfd_map_over_sections (abfd, get_progbounds_iterator, pbp); | |
406 | return; | |
407 | } | |
408 | ||
409 | phdr = elf_tdata (abfd)->phdr; | |
410 | n_hdrs = elf_elfheader (abfd)->e_phnum; | |
411 | ||
412 | /* We're only interested in PT_LOAD; all necessary information | |
413 | should be covered by that. */ | |
414 | for (i = 0; i < n_hdrs; i++) | |
415 | { | |
416 | if (phdr[i].p_type != PT_LOAD) | |
417 | continue; | |
418 | ||
419 | if (phdr[i].p_paddr < pbp->startmem) | |
420 | pbp->startmem = phdr[i].p_paddr; | |
421 | ||
422 | if (phdr[i].p_paddr + phdr[i].p_memsz > pbp->endmem) | |
423 | pbp->endmem = phdr[i].p_paddr + phdr[i].p_memsz; | |
424 | ||
425 | if (phdr[i].p_paddr + phdr[i].p_filesz > pbp->end_loadmem) | |
426 | pbp->end_loadmem = phdr[i].p_paddr + phdr[i].p_filesz; | |
427 | ||
428 | if (phdr[i].p_memsz > phdr[i].p_filesz | |
429 | && phdr[i].p_paddr + phdr[i].p_filesz < pbp->start_nonloadmem) | |
430 | pbp->start_nonloadmem = phdr[i].p_paddr + phdr[i].p_filesz; | |
431 | } | |
432 | } | |
433 | ||
434 | /* Parameter communication by static variables, hmm... Oh well, for | |
435 | simplicity. */ | |
436 | static bfd_vma exec_load_addr; | |
437 | static bfd_vma interp_load_addr; | |
438 | static bfd_vma interp_start_addr; | |
439 | ||
440 | /* Supposed to mimic Linux' "NEW_AUX_ENT (AT_PHDR, load_addr + exec->e_phoff)". */ | |
441 | ||
442 | static USI | |
443 | aux_ent_phdr (struct bfd *ebfd) | |
444 | { | |
445 | return elf_elfheader (ebfd)->e_phoff + exec_load_addr; | |
446 | } | |
447 | ||
448 | /* We just pass on the header info; we don't have our own idea of the | |
449 | program header entry size. */ | |
450 | ||
451 | static USI | |
452 | aux_ent_phent (struct bfd *ebfd) | |
453 | { | |
454 | return elf_elfheader (ebfd)->e_phentsize; | |
455 | } | |
456 | ||
457 | /* Like "NEW_AUX_ENT(AT_PHNUM, exec->e_phnum)". */ | |
458 | ||
459 | static USI | |
460 | aux_ent_phnum (struct bfd *ebfd) | |
461 | { | |
462 | return elf_elfheader (ebfd)->e_phnum; | |
463 | } | |
464 | ||
465 | /* Like "NEW_AUX_ENT(AT_BASE, interp_load_addr)". */ | |
466 | ||
467 | static USI | |
468 | aux_ent_base (struct bfd *ebfd) | |
469 | { | |
470 | return interp_load_addr; | |
471 | } | |
472 | ||
473 | /* Like "NEW_AUX_ENT(AT_ENTRY, exec->e_entry)". */ | |
474 | ||
475 | static USI | |
476 | aux_ent_entry (struct bfd *ebfd) | |
477 | { | |
478 | ASSERT (elf_elfheader (ebfd)->e_entry == bfd_get_start_address (ebfd)); | |
479 | return elf_elfheader (ebfd)->e_entry; | |
480 | } | |
481 | ||
482 | /* Helper for cris_handle_interpreter: like sim_write, but load at | |
483 | interp_load_addr offset. */ | |
484 | ||
485 | static int | |
486 | cris_write_interp (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length) | |
487 | { | |
488 | return sim_write (sd, mem + interp_load_addr, buf, length); | |
489 | } | |
490 | ||
491 | /* Cater to the presence of an interpreter: load it and set | |
492 | interp_start_addr. Return FALSE if there was an error, TRUE if | |
493 | everything went fine, including an interpreter being absent and | |
494 | the program being in a non-ELF format. */ | |
495 | ||
496 | static bfd_boolean | |
497 | cris_handle_interpreter (SIM_DESC sd, struct bfd *abfd) | |
498 | { | |
499 | int i, n_hdrs; | |
500 | bfd_vma phaddr; | |
501 | bfd_byte buf[4]; | |
502 | char *interp = NULL; | |
503 | struct bfd *ibfd; | |
504 | bfd_boolean ok = FALSE; | |
505 | Elf_Internal_Phdr *phdr; | |
506 | ||
507 | if (bfd_get_flavour (abfd) != bfd_target_elf_flavour) | |
508 | return TRUE; | |
509 | ||
510 | phdr = elf_tdata (abfd)->phdr; | |
511 | n_hdrs = aux_ent_phnum (abfd); | |
512 | ||
513 | /* Check the program headers for presence of an interpreter. */ | |
514 | for (i = 0; i < n_hdrs; i++) | |
515 | { | |
516 | int interplen; | |
517 | bfd_size_type interpsiz, interp_filesiz; | |
518 | struct progbounds interp_bounds; | |
519 | ||
520 | if (phdr[i].p_type != PT_INTERP) | |
521 | continue; | |
522 | ||
523 | /* Get the name of the interpreter, prepended with the sysroot | |
524 | (empty if absent). */ | |
525 | interplen = phdr[i].p_filesz; | |
526 | interp = xmalloc (interplen + strlen (simulator_sysroot)); | |
527 | strcpy (interp, simulator_sysroot); | |
528 | ||
529 | /* Read in the name. */ | |
530 | if (bfd_seek (abfd, phdr[i].p_offset, SEEK_SET) != 0 | |
531 | || (bfd_bread (interp + strlen (simulator_sysroot), interplen, abfd) | |
532 | != interplen)) | |
533 | goto interpname_failed; | |
534 | ||
535 | /* Like Linux, require the string to be 0-terminated. */ | |
536 | if (interp[interplen + strlen (simulator_sysroot) - 1] != 0) | |
537 | goto interpname_failed; | |
538 | ||
539 | /* Inspect the interpreter. */ | |
540 | ibfd = bfd_openr (interp, STATE_TARGET (sd)); | |
541 | if (ibfd == NULL) | |
542 | goto interpname_failed; | |
543 | ||
c10b3605 | 544 | /* The interpreter is at least something readable to BFD; make |
80e5c09e HPN |
545 | sure it's an ELF non-archive file. */ |
546 | if (!bfd_check_format (ibfd, bfd_object) | |
547 | || bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
548 | goto interp_failed; | |
549 | ||
550 | /* Check the layout of the interpreter. */ | |
551 | cris_get_progbounds (ibfd, &interp_bounds); | |
552 | ||
553 | /* Round down to pagesize the start page and up the endpage. | |
554 | Don't round the *load and *nonload members. */ | |
555 | interp_bounds.startmem &= ~8191; | |
556 | interp_bounds.endmem = (interp_bounds.endmem + 8191) & ~8191; | |
557 | ||
558 | /* Until we need a more dynamic solution, assume we can put the | |
559 | interpreter at this fixed location. NB: this is not what | |
560 | happens for Linux 2008-12-28, but it could and might and | |
561 | perhaps should. */ | |
562 | interp_load_addr = 0x40000; | |
563 | interpsiz = interp_bounds.endmem - interp_bounds.startmem; | |
564 | interp_filesiz = interp_bounds.end_loadmem - interp_bounds.startmem; | |
565 | ||
566 | /* If we have a non-DSO or interpreter starting at the wrong | |
567 | address, bail. */ | |
568 | if (interp_bounds.startmem != 0 | |
569 | || interpsiz + interp_load_addr >= exec_load_addr) | |
570 | goto interp_failed; | |
571 | ||
572 | /* We don't have the API to get the address of a simulator | |
573 | memory area, so we go via a temporary area. Luckily, the | |
574 | interpreter is supposed to be small, less than 0x40000 | |
575 | bytes. */ | |
576 | sim_do_commandf (sd, "memory region 0x%lx,0x%lx", | |
577 | interp_load_addr, interpsiz); | |
578 | ||
579 | /* Now that memory for the interpreter is defined, load it. */ | |
580 | if (!cris_load_elf_file (sd, ibfd, cris_write_interp)) | |
581 | goto interp_failed; | |
582 | ||
583 | /* It's no use setting STATE_START_ADDR, because it gets | |
584 | overwritten by a sim_analyze_program call in sim_load. Let's | |
585 | just store it locally. */ | |
586 | interp_start_addr | |
587 | = (bfd_get_start_address (ibfd) | |
588 | - interp_bounds.startmem + interp_load_addr); | |
589 | ||
590 | /* Linux cares only about the first PT_INTERP, so let's ignore | |
591 | the rest. */ | |
592 | goto all_done; | |
f6bcefef | 593 | } |
80e5c09e HPN |
594 | |
595 | /* Register R10 should hold 0 at static start (no finifunc), but | |
596 | that's the default, so don't bother. */ | |
597 | return TRUE; | |
598 | ||
599 | all_done: | |
600 | ok = TRUE; | |
601 | ||
602 | interp_failed: | |
603 | bfd_close (ibfd); | |
604 | ||
605 | interpname_failed: | |
606 | if (!ok) | |
607 | sim_io_eprintf (sd, | |
608 | "%s: could not load ELF interpreter `%s' for program `%s'\n", | |
609 | STATE_MY_NAME (sd), | |
610 | interp == NULL ? "(what's-its-name)" : interp, | |
611 | bfd_get_filename (abfd)); | |
612 | free (interp); | |
613 | return ok; | |
f6bcefef HPN |
614 | } |
615 | ||
616 | /* Create an instance of the simulator. */ | |
617 | ||
618 | SIM_DESC | |
619 | sim_open (SIM_OPEN_KIND kind, host_callback *callback, struct bfd *abfd, | |
2e3d4f4d | 620 | char * const *argv) |
f6bcefef HPN |
621 | { |
622 | char c; | |
623 | int i; | |
624 | USI startmem = 0; | |
625 | USI endmem = CRIS_DEFAULT_MEM_SIZE; | |
626 | USI endbrk = endmem; | |
627 | USI stack_low = 0; | |
628 | SIM_DESC sd = sim_state_alloc (kind, callback); | |
629 | ||
80e5c09e HPN |
630 | static const struct auxv_entries_s |
631 | { | |
632 | bfd_byte id; | |
633 | USI (*efn) (struct bfd *ebfd); | |
634 | USI val; | |
635 | } auxv_entries[] = | |
636 | { | |
a3d4b83b HPN |
637 | #define AUX_ENT(a, b) {a, NULL, b} |
638 | #define AUX_ENTF(a, f) {a, f, 0} | |
80e5c09e HPN |
639 | AUX_ENT (AT_HWCAP, 0), |
640 | AUX_ENT (AT_PAGESZ, 8192), | |
641 | AUX_ENT (AT_CLKTCK, 100), | |
a3d4b83b HPN |
642 | AUX_ENTF (AT_PHDR, aux_ent_phdr), |
643 | AUX_ENTF (AT_PHENT, aux_ent_phent), | |
644 | AUX_ENTF (AT_PHNUM, aux_ent_phnum), | |
645 | AUX_ENTF (AT_BASE, aux_ent_base), | |
80e5c09e | 646 | AUX_ENT (AT_FLAGS, 0), |
a3d4b83b | 647 | AUX_ENTF (AT_ENTRY, aux_ent_entry), |
80e5c09e HPN |
648 | |
649 | /* Or is root better? Maybe have it settable? */ | |
650 | AUX_ENT (AT_UID, 500), | |
651 | AUX_ENT (AT_EUID, 500), | |
652 | AUX_ENT (AT_GID, 500), | |
653 | AUX_ENT (AT_EGID, 500), | |
a3d4b83b | 654 | AUX_ENT (AT_SECURE, 0), |
80e5c09e HPN |
655 | AUX_ENT (AT_NULL, 0) |
656 | }; | |
657 | ||
f6bcefef HPN |
658 | /* Can't initialize to "" below. It's either a GCC bug in old |
659 | releases (up to and including 2.95.3 (.4 in debian) or a bug in the | |
660 | standard ;-) that the rest of the elements won't be initialized. */ | |
661 | bfd_byte sp_init[4] = {0, 0, 0, 0}; | |
662 | ||
663 | /* The cpu data is kept in a separately allocated chunk of memory. */ | |
664 | if (sim_cpu_alloc_all (sd, 1, cgen_cpu_max_extra_bytes ()) != SIM_RC_OK) | |
665 | { | |
666 | free_state (sd); | |
667 | return 0; | |
668 | } | |
669 | ||
670 | if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK) | |
671 | { | |
672 | free_state (sd); | |
673 | return 0; | |
674 | } | |
675 | ||
9db2b719 MF |
676 | /* Add the CRIS-specific option list to the simulator. */ |
677 | if (sim_add_option_table (sd, NULL, cris_options) != SIM_RC_OK) | |
678 | { | |
679 | free_state (sd); | |
680 | return 0; | |
681 | } | |
682 | ||
77cf2ef5 | 683 | /* The parser will print an error message for us, so we silently return. */ |
f6bcefef HPN |
684 | if (sim_parse_args (sd, argv) != SIM_RC_OK) |
685 | { | |
686 | free_state (sd); | |
687 | return 0; | |
688 | } | |
689 | ||
f6bcefef HPN |
690 | /* check for/establish the reference program image */ |
691 | if (sim_analyze_program (sd, | |
692 | (STATE_PROG_ARGV (sd) != NULL | |
693 | ? *STATE_PROG_ARGV (sd) | |
694 | : NULL), | |
695 | abfd) != SIM_RC_OK) | |
696 | { | |
a0956358 HPN |
697 | /* When there's an error, sim_analyze_program has already output |
698 | a message. Let's just clarify it, as "not an object file" | |
699 | perhaps doesn't ring a bell. */ | |
700 | sim_io_eprintf (sd, "(not a CRIS program)\n"); | |
80e5c09e HPN |
701 | free_state (sd); |
702 | return 0; | |
703 | } | |
704 | ||
705 | /* We might get called with the caller expecting us to get hold of | |
706 | the bfd for ourselves, which would happen at the | |
707 | sim_analyze_program call above. */ | |
708 | if (abfd == NULL) | |
709 | abfd = STATE_PROG_BFD (sd); | |
710 | ||
c10b3605 HPN |
711 | /* Adjust the addresses of the program at this point. Unfortunately |
712 | this does not affect ELF program headers, so we have to handle | |
713 | that separately. */ | |
714 | cris_offset_sections (sd, cris_program_offset); | |
715 | ||
716 | if (abfd != NULL && bfd_get_arch (abfd) == bfd_arch_unknown) | |
80e5c09e HPN |
717 | { |
718 | if (STATE_PROG_ARGV (sd) != NULL) | |
a0956358 | 719 | sim_io_eprintf (sd, "%s: `%s' is not a CRIS program\n", |
80e5c09e HPN |
720 | STATE_MY_NAME (sd), *STATE_PROG_ARGV (sd)); |
721 | else | |
722 | sim_io_eprintf (sd, "%s: program to be run is not a CRIS program\n", | |
723 | STATE_MY_NAME (sd)); | |
f6bcefef HPN |
724 | free_state (sd); |
725 | return 0; | |
726 | } | |
727 | ||
728 | /* For CRIS simulator-specific use, we need to find out the bounds of | |
729 | the program as well, which is not done by sim_analyze_program | |
730 | above. */ | |
80e5c09e | 731 | if (abfd != NULL) |
f6bcefef HPN |
732 | { |
733 | struct progbounds pb; | |
734 | ||
735 | /* The sections should now be accessible using bfd functions. */ | |
80e5c09e | 736 | cris_get_progbounds (abfd, &pb); |
f6bcefef HPN |
737 | |
738 | /* We align the area that the program uses to page boundaries. */ | |
739 | startmem = pb.startmem & ~8191; | |
740 | endbrk = pb.endmem; | |
741 | endmem = (endbrk + 8191) & ~8191; | |
742 | } | |
743 | ||
744 | /* Find out how much room is needed for the environment and argv, create | |
745 | that memory and fill it. Only do this when there's a program | |
746 | specified. */ | |
80e5c09e | 747 | if (abfd != NULL && !cris_bare_iron) |
f6bcefef | 748 | { |
b16c44de | 749 | const char *name = bfd_get_filename (abfd); |
f6bcefef HPN |
750 | char **my_environ = GET_ENVIRON (); |
751 | /* We use these maps to give the same behavior as the old xsim | |
752 | simulator. */ | |
753 | USI envtop = 0x40000000; | |
754 | USI stacktop = 0x3e000000; | |
755 | USI envstart; | |
756 | int envc; | |
757 | int len = strlen (name) + 1; | |
758 | USI epp, epp0; | |
759 | USI stacklen; | |
760 | int i; | |
761 | char **prog_argv = STATE_PROG_ARGV (sd); | |
762 | int my_argc = 0; | |
f6bcefef HPN |
763 | USI csp; |
764 | bfd_byte buf[4]; | |
765 | ||
766 | /* Count in the environment as well. */ | |
767 | for (envc = 0; my_environ[envc] != NULL; envc++) | |
768 | len += strlen (my_environ[envc]) + 1; | |
769 | ||
770 | for (i = 0; prog_argv[i] != NULL; my_argc++, i++) | |
771 | len += strlen (prog_argv[i]) + 1; | |
772 | ||
773 | envstart = (envtop - len) & ~8191; | |
774 | ||
775 | /* Create read-only block for the environment strings. */ | |
776 | sim_core_attach (sd, NULL, 0, access_read, 0, | |
777 | envstart, (len + 8191) & ~8191, | |
778 | 0, NULL, NULL); | |
779 | ||
780 | /* This shouldn't happen. */ | |
781 | if (envstart < stacktop) | |
782 | stacktop = envstart - 64 * 8192; | |
783 | ||
784 | csp = stacktop; | |
785 | ||
786 | /* Note that the linux kernel does not correctly compute the storage | |
787 | needs for the static-exe AUX vector. */ | |
80e5c09e | 788 | |
13a590ca | 789 | csp -= ARRAY_SIZE (auxv_entries) * 4 * 2; |
f6bcefef HPN |
790 | |
791 | csp -= (envc + 1) * 4; | |
792 | csp -= (my_argc + 1) * 4; | |
793 | csp -= 4; | |
794 | ||
795 | /* Write the target representation of the start-up-value for the | |
796 | stack-pointer suitable for register initialization below. */ | |
797 | bfd_putl32 (csp, sp_init); | |
798 | ||
799 | /* If we make this 1M higher; say 8192*1024, we have to take | |
800 | special precautions for pthreads, because pthreads assumes that | |
801 | the memory that low isn't mmapped, and that it can mmap it | |
802 | without fallback in case of failure (and we fail ungracefully | |
803 | long before *that*: the memory isn't accounted for in our mmap | |
804 | list). */ | |
805 | stack_low = (csp - (7168*1024)) & ~8191; | |
806 | ||
807 | stacklen = stacktop - stack_low; | |
808 | ||
809 | /* Tee hee, we have an executable stack. Well, it's necessary to | |
810 | test GCC trampolines... */ | |
811 | sim_core_attach (sd, NULL, 0, access_read_write_exec, 0, | |
812 | stack_low, stacklen, | |
813 | 0, NULL, NULL); | |
814 | ||
815 | epp = epp0 = envstart; | |
816 | ||
817 | /* Can't use sim_core_write_unaligned_4 without everything | |
818 | initialized when tracing, and then these writes would get into | |
819 | the trace. */ | |
820 | #define write_dword(addr, data) \ | |
821 | do \ | |
822 | { \ | |
823 | USI data_ = data; \ | |
824 | USI addr_ = addr; \ | |
825 | bfd_putl32 (data_, buf); \ | |
8b494522 | 826 | if (sim_core_write_buffer (sd, NULL, NULL_CIA, buf, addr_, 4) != 4)\ |
f6bcefef HPN |
827 | goto abandon_chip; \ |
828 | } \ | |
829 | while (0) | |
830 | ||
831 | write_dword (csp, my_argc); | |
832 | csp += 4; | |
833 | ||
834 | for (i = 0; i < my_argc; i++, csp += 4) | |
835 | { | |
836 | size_t strln = strlen (prog_argv[i]) + 1; | |
837 | ||
8b494522 MF |
838 | if (sim_core_write_buffer (sd, NULL, NULL_CIA, prog_argv[i], epp, |
839 | strln) | |
f6bcefef HPN |
840 | != strln) |
841 | goto abandon_chip; | |
842 | ||
843 | write_dword (csp, envstart + epp - epp0); | |
844 | epp += strln; | |
845 | } | |
846 | ||
847 | write_dword (csp, 0); | |
848 | csp += 4; | |
849 | ||
850 | for (i = 0; i < envc; i++, csp += 4) | |
851 | { | |
852 | unsigned int strln = strlen (my_environ[i]) + 1; | |
853 | ||
8b494522 MF |
854 | if (sim_core_write_buffer (sd, NULL, NULL_CIA, my_environ[i], epp, |
855 | strln) | |
f6bcefef HPN |
856 | != strln) |
857 | goto abandon_chip; | |
858 | ||
859 | write_dword (csp, envstart + epp - epp0); | |
860 | epp += strln; | |
861 | } | |
862 | ||
863 | write_dword (csp, 0); | |
864 | csp += 4; | |
865 | ||
80e5c09e HPN |
866 | /* The load address of the executable could presumably be |
867 | different than the lowest used memory address, but let's | |
868 | stick to simplicity until needed. And | |
869 | cris_handle_interpreter might change startmem and endmem, so | |
870 | let's set it now. */ | |
871 | exec_load_addr = startmem; | |
f6bcefef | 872 | |
80e5c09e HPN |
873 | if (!cris_handle_interpreter (sd, abfd)) |
874 | goto abandon_chip; | |
f6bcefef | 875 | |
80e5c09e | 876 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour) |
13a590ca | 877 | for (i = 0; i < ARRAY_SIZE (auxv_entries); i++) |
80e5c09e HPN |
878 | { |
879 | write_dword (csp, auxv_entries[i].id); | |
880 | write_dword (csp + 4, | |
881 | auxv_entries[i].efn != NULL | |
882 | ? (*auxv_entries[i].efn) (abfd) | |
883 | : auxv_entries[i].val); | |
884 | csp += 4 + 4; | |
885 | } | |
f6bcefef HPN |
886 | } |
887 | ||
888 | /* Allocate core managed memory if none specified by user. */ | |
889 | if (sim_core_read_buffer (sd, NULL, read_map, &c, startmem, 1) == 0) | |
890 | sim_do_commandf (sd, "memory region 0x%lx,0x%lx", startmem, | |
891 | endmem - startmem); | |
892 | ||
893 | /* Allocate simulator I/O managed memory if none specified by user. */ | |
894 | if (cris_have_900000xxif) | |
34cf5112 | 895 | sim_hw_parse (sd, "/core/%s/reg %#x %i", "cris_900000xx", 0x90000000, 0x100); |
f6bcefef HPN |
896 | |
897 | /* Establish any remaining configuration options. */ | |
898 | if (sim_config (sd) != SIM_RC_OK) | |
899 | { | |
900 | abandon_chip: | |
901 | free_state (sd); | |
902 | return 0; | |
903 | } | |
904 | ||
905 | if (sim_post_argv_init (sd) != SIM_RC_OK) | |
906 | { | |
907 | free_state (sd); | |
908 | return 0; | |
909 | } | |
910 | ||
911 | /* Open a copy of the cpu descriptor table. */ | |
912 | { | |
913 | CGEN_CPU_DESC cd = cris_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name, | |
914 | CGEN_ENDIAN_LITTLE); | |
915 | for (i = 0; i < MAX_NR_PROCESSORS; ++i) | |
916 | { | |
917 | SIM_CPU *cpu = STATE_CPU (sd, i); | |
918 | CPU_CPU_DESC (cpu) = cd; | |
919 | CPU_DISASSEMBLER (cpu) = cris_disassemble_insn; | |
920 | ||
921 | /* See cris_option_handler for the reason why this is needed. */ | |
922 | CPU_CRIS_MISC_PROFILE (cpu)->flags = STATE_TRACE_FLAGS (sd)[0]; | |
923 | ||
924 | /* Set SP to the stack we allocated above. */ | |
925 | (* CPU_REG_STORE (cpu)) (cpu, H_GR_SP, (char *) sp_init, 4); | |
926 | ||
927 | /* Set the simulator environment data. */ | |
928 | cpu->highest_mmapped_page = NULL; | |
929 | cpu->endmem = endmem; | |
930 | cpu->endbrk = endbrk; | |
931 | cpu->stack_low = stack_low; | |
932 | cpu->syscalls = 0; | |
933 | cpu->m1threads = 0; | |
934 | cpu->threadno = 0; | |
935 | cpu->max_threadid = 0; | |
936 | cpu->thread_data = NULL; | |
937 | memset (cpu->sighandler, 0, sizeof (cpu->sighandler)); | |
938 | cpu->make_thread_cpu_data = NULL; | |
939 | cpu->thread_cpu_data_size = 0; | |
aad3b3cb HPN |
940 | #if WITH_HW |
941 | cpu->deliver_interrupt = NULL; | |
942 | #endif | |
f6bcefef | 943 | } |
aad3b3cb HPN |
944 | #if WITH_HW |
945 | /* Always be cycle-accurate and call before/after functions if | |
946 | with-hardware. */ | |
947 | sim_profile_set_option (sd, "-model", PROFILE_MODEL_IDX, "on"); | |
948 | #endif | |
f6bcefef HPN |
949 | } |
950 | ||
951 | /* Initialize various cgen things not done by common framework. | |
952 | Must be done after cris_cgen_cpu_open. */ | |
953 | cgen_init (sd); | |
954 | ||
f6bcefef HPN |
955 | cris_set_callbacks (callback); |
956 | ||
957 | return sd; | |
958 | } | |
f6bcefef HPN |
959 | \f |
960 | SIM_RC | |
961 | sim_create_inferior (SIM_DESC sd, struct bfd *abfd, | |
2e3d4f4d MF |
962 | char * const *argv ATTRIBUTE_UNUSED, |
963 | char * const *envp ATTRIBUTE_UNUSED) | |
f6bcefef HPN |
964 | { |
965 | SIM_CPU *current_cpu = STATE_CPU (sd, 0); | |
966 | SIM_ADDR addr; | |
967 | ||
80e5c09e | 968 | if (sd != NULL) |
c10b3605 HPN |
969 | addr = cris_start_address != (SIM_ADDR) -1 |
970 | ? cris_start_address | |
971 | : (interp_start_addr != 0 | |
972 | ? interp_start_addr | |
973 | : bfd_get_start_address (abfd)); | |
f6bcefef HPN |
974 | else |
975 | addr = 0; | |
976 | sim_pc_set (current_cpu, addr); | |
977 | ||
0e967299 MF |
978 | /* Standalone mode (i.e. `run`) will take care of the argv for us in |
979 | sim_open() -> sim_parse_args(). But in debug mode (i.e. 'target sim' | |
980 | with `gdb`), we need to handle it because the user can change the | |
981 | argv on the fly via gdb's 'run'. */ | |
982 | if (STATE_PROG_ARGV (sd) != argv) | |
983 | { | |
984 | freeargv (STATE_PROG_ARGV (sd)); | |
985 | STATE_PROG_ARGV (sd) = dupargv (argv); | |
986 | } | |
f6bcefef HPN |
987 | |
988 | return SIM_RC_OK; | |
989 | } | |
f6bcefef HPN |
990 | \f |
991 | /* Disassemble an instruction. */ | |
992 | ||
993 | static void | |
994 | cris_disassemble_insn (SIM_CPU *cpu, | |
995 | const CGEN_INSN *insn ATTRIBUTE_UNUSED, | |
996 | const ARGBUF *abuf ATTRIBUTE_UNUSED, | |
997 | IADDR pc, char *buf) | |
998 | { | |
999 | disassembler_ftype pinsn; | |
1000 | struct disassemble_info disasm_info; | |
1001 | SFILE sfile; | |
1002 | SIM_DESC sd = CPU_STATE (cpu); | |
1003 | ||
1004 | sfile.buffer = sfile.current = buf; | |
1005 | INIT_DISASSEMBLE_INFO (disasm_info, (FILE *) &sfile, | |
1006 | (fprintf_ftype) sim_disasm_sprintf); | |
80e5c09e HPN |
1007 | disasm_info.endian = BFD_ENDIAN_LITTLE; |
1008 | disasm_info.read_memory_func = sim_disasm_read_memory; | |
f6bcefef HPN |
1009 | disasm_info.memory_error_func = sim_disasm_perror_memory; |
1010 | disasm_info.application_data = (PTR) cpu; | |
1011 | pinsn = cris_get_disassembler (STATE_PROG_BFD (sd)); | |
1012 | (*pinsn) (pc, &disasm_info); | |
1013 | } |