1 /* Main simulator entry points specific to the CRIS.
2 Copyright (C) 2004-2023 Free Software Foundation, Inc.
3 Contributed by Axis Communications.
5 This file is part of the GNU simulators.
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
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
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.
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/>. */
20 /* Based on the fr30 file, mixing in bits from the i960 and pruning of
23 /* This must come before any other includes. */
30 #include "libiberty.h"
34 #include "sim/callback.h"
36 #include "sim-options.h"
41 /* Used with get_progbounds to find out how much memory is needed for the
42 program. We don't want to allocate more, since that could mask
43 invalid memory accesses program bugs. */
51 static void free_state (SIM_DESC);
52 static void get_progbounds_iterator (bfd *, asection *, void *);
53 static SIM_RC cris_option_handler (SIM_DESC, sim_cpu *, int, char *, int);
55 /* Since we don't build the cgen-opcode table, we use the old
57 static CGEN_DISASSEMBLER cris_disassemble_insn;
59 /* By default, we set up stack and environment variables like the Linux
61 static char cris_bare_iron = 0;
63 /* Whether 0x9000000xx have simulator-specific meanings. */
64 char cris_have_900000xxif = 0;
66 /* Used to optionally override the default start address of the
68 static USI cris_start_address = 0xffffffffu;
70 /* Used to optionally add offsets to the loaded image and its start
71 address. (Not used for the interpreter of dynamically loaded
72 programs or the DSO:s.) */
73 static int cris_program_offset = 0;
75 /* What to do when we face a more or less unknown syscall. */
76 enum cris_unknown_syscall_action_type cris_unknown_syscall_action
77 = CRIS_USYSC_MSG_STOP;
79 /* CRIS-specific options. */
81 OPTION_CRIS_STATS = OPTION_START,
84 OPTION_CRIS_PROGRAM_OFFSET,
85 OPTION_CRIS_STARTADDR,
86 OPTION_CRIS_900000XXIF,
87 OPTION_CRIS_UNKNOWN_SYSCALL
90 static const OPTION cris_options[] =
92 { {"cris-cycles", required_argument, NULL, OPTION_CRIS_STATS},
93 '\0', "basic|unaligned|schedulable|all",
94 "Dump execution statistics",
95 cris_option_handler, NULL },
96 { {"cris-trace", required_argument, NULL, OPTION_CRIS_TRACE},
98 "Emit trace information while running",
99 cris_option_handler, NULL },
100 { {"cris-naked", no_argument, NULL, OPTION_CRIS_NAKED},
101 '\0', NULL, "Don't set up stack and environment",
102 cris_option_handler, NULL },
104 { {"cris-900000xx", no_argument, NULL, OPTION_CRIS_900000XXIF},
105 '\0', NULL, "Define addresses at 0x900000xx with simulator semantics",
106 cris_option_handler, NULL },
108 { {"cris-unknown-syscall", required_argument, NULL,
109 OPTION_CRIS_UNKNOWN_SYSCALL},
110 '\0', "stop|enosys|enosys-quiet", "Action at an unknown system call",
111 cris_option_handler, NULL },
112 { {"cris-program-offset", required_argument, NULL,
113 OPTION_CRIS_PROGRAM_OFFSET},
115 "Offset image addresses and default start address of a program",
116 cris_option_handler },
117 { {"cris-start-address", required_argument, NULL, OPTION_CRIS_STARTADDR},
118 '\0', "ADDRESS", "Set start address",
119 cris_option_handler },
120 { {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL, NULL }
123 /* Handle CRIS-specific options. */
126 cris_option_handler (SIM_DESC sd, sim_cpu *cpu ATTRIBUTE_UNUSED, int opt,
127 char *arg, int is_command ATTRIBUTE_UNUSED)
129 /* The options are CRIS-specific, but cpu-specific option-handling is
130 broken; required to being with "--cpu0-". We store the flags in an
131 unused field in the global state structure and move the flags over
132 to the module-specific CPU data when we store things in the
133 cpu-specific structure. */
134 char *tracefp = STATE_TRACE_FLAGS (sd);
137 switch ((CRIS_OPTIONS) opt)
139 case OPTION_CRIS_STATS:
140 if (strcmp (arg, "basic") == 0)
141 *tracefp = FLAG_CRIS_MISC_PROFILE_SIMPLE;
142 else if (strcmp (arg, "unaligned") == 0)
144 = (FLAG_CRIS_MISC_PROFILE_UNALIGNED
145 | FLAG_CRIS_MISC_PROFILE_SIMPLE);
146 else if (strcmp (arg, "schedulable") == 0)
148 = (FLAG_CRIS_MISC_PROFILE_SCHEDULABLE
149 | FLAG_CRIS_MISC_PROFILE_SIMPLE);
150 else if (strcmp (arg, "all") == 0)
151 *tracefp = FLAG_CRIS_MISC_PROFILE_ALL;
154 /* Beware; the framework does not handle the error case;
155 we have to do it ourselves. */
156 sim_io_eprintf (sd, "Unknown option `--cris-cycles=%s'\n", arg);
161 case OPTION_CRIS_TRACE:
162 if (strcmp (arg, "basic") == 0)
163 *tracefp |= FLAG_CRIS_MISC_PROFILE_XSIM_TRACE;
166 sim_io_eprintf (sd, "Unknown option `--cris-trace=%s'\n", arg);
171 case OPTION_CRIS_NAKED:
175 case OPTION_CRIS_900000XXIF:
176 cris_have_900000xxif = 1;
179 case OPTION_CRIS_STARTADDR:
181 cris_start_address = (USI) strtoul (chp, &chp, 0);
183 if (errno != 0 || *chp != 0)
185 sim_io_eprintf (sd, "Invalid option `--cris-start-address=%s'\n",
191 case OPTION_CRIS_PROGRAM_OFFSET:
193 cris_program_offset = (int) strtol (chp, &chp, 0);
195 if (errno != 0 || *chp != 0)
197 sim_io_eprintf (sd, "Invalid option `--cris-program-offset=%s'\n",
203 case OPTION_CRIS_UNKNOWN_SYSCALL:
204 if (strcmp (arg, "enosys") == 0)
205 cris_unknown_syscall_action = CRIS_USYSC_MSG_ENOSYS;
206 else if (strcmp (arg, "enosys-quiet") == 0)
207 cris_unknown_syscall_action = CRIS_USYSC_QUIET_ENOSYS;
208 else if (strcmp (arg, "stop") == 0)
209 cris_unknown_syscall_action = CRIS_USYSC_MSG_STOP;
212 sim_io_eprintf (sd, "Unknown option `--cris-unknown-syscall=%s'\n",
219 /* We'll actually never get here; the caller handles the error
221 sim_io_eprintf (sd, "Unknown option `%s'\n", arg);
225 /* Imply --profile-model=on. */
226 return sim_profile_set_option (sd, "-model", PROFILE_MODEL_IDX, "on");
229 /* An ELF-specific simplified ../common/sim-load.c:sim_load_file,
230 using the program headers, not sections, in order to make sure that
231 the program headers themeselves are also loaded. The caller is
232 responsible for asserting that ABFD is an ELF file. */
235 cris_load_elf_file (SIM_DESC sd, struct bfd *abfd, sim_write_fn do_write)
237 Elf_Internal_Phdr *phdr;
240 bfd_boolean verbose = STATE_OPEN_KIND (sd) == SIM_OPEN_DEBUG;
242 phdr = elf_tdata (abfd)->phdr;
243 n_hdrs = elf_elfheader (abfd)->e_phnum;
245 /* We're only interested in PT_LOAD; all necessary information
246 should be covered by that. */
247 for (i = 0; i < n_hdrs; i++)
250 bfd_vma lma = STATE_LOAD_AT_LMA_P (sd)
251 ? phdr[i].p_paddr : phdr[i].p_vaddr;
253 if (phdr[i].p_type != PT_LOAD)
256 buf = xmalloc (phdr[i].p_filesz);
260 "Loading segment at 0x%" PRIx64 ", "
261 "size 0x%" PRIx64 "\n",
262 (uint64_t) lma, (uint64_t) phdr[i].p_filesz);
264 if (bfd_seek (abfd, phdr[i].p_offset, SEEK_SET) != 0
265 || (bfd_bread (buf, phdr[i].p_filesz, abfd) != phdr[i].p_filesz))
268 "%s: could not read segment at 0x%" PRIx64 ", "
269 "size 0x%" PRIx64 "\n",
270 STATE_MY_NAME (sd), (uint64_t) lma,
271 (uint64_t) phdr[i].p_filesz);
276 if (do_write (sd, lma, buf, phdr[i].p_filesz) != phdr[i].p_filesz)
279 "%s: could not load segment at 0x%" PRIx64 ", "
280 "size 0x%" PRIx64 "\n",
281 STATE_MY_NAME (sd), (uint64_t) lma,
282 (uint64_t) phdr[i].p_filesz);
293 /* Cover function of sim_state_free to free the cpu buffers as well. */
296 free_state (SIM_DESC sd)
298 if (STATE_MODULES (sd) != NULL)
299 sim_module_uninstall (sd);
300 sim_cpu_free_all (sd);
304 /* Helper struct for cris_set_section_offset_iterator. */
312 /* BFD section iterator to offset the LMA and VMA. */
315 cris_set_section_offset_iterator (bfd *abfd, asection *s, void *vp)
317 struct offsetinfo *p = (struct offsetinfo *) vp;
319 int offset = p->offset;
321 if ((bfd_section_flags (s) & SEC_ALLOC))
323 bfd_vma vma = bfd_section_vma (s);
325 bfd_set_section_vma (s, vma + offset);
328 /* This seems clumsy and inaccurate, but let's stick to doing it the
329 same way as sim_analyze_program for consistency. */
330 if (strcmp (bfd_section_name (s), ".text") == 0)
331 STATE_TEXT_START (sd) = bfd_section_vma (s);
334 /* Adjust the start-address, LMA and VMA of a SD. Must be called
335 after sim_analyze_program. */
338 cris_offset_sections (SIM_DESC sd, int offset)
341 struct bfd *abfd = STATE_PROG_BFD (sd);
343 struct offsetinfo oi;
345 /* Only happens for usage error. */
352 bfd_map_over_sections (abfd, cris_set_section_offset_iterator, &oi);
353 ret = bfd_set_start_address (abfd, bfd_get_start_address (abfd) + offset);
355 STATE_START_ADDR (sd) = bfd_get_start_address (abfd);
358 /* BFD section iterator to find the highest and lowest allocated and
359 non-allocated section addresses (plus one). */
362 get_progbounds_iterator (bfd *abfd ATTRIBUTE_UNUSED, asection *s, void *vp)
364 struct progbounds *pbp = (struct progbounds *) vp;
366 if ((bfd_section_flags (s) & SEC_ALLOC))
368 bfd_size_type sec_size = bfd_section_size (s);
369 bfd_size_type sec_start = bfd_section_vma (s);
370 bfd_size_type sec_end = sec_start + sec_size;
372 if (sec_end > pbp->endmem)
373 pbp->endmem = sec_end;
375 if (sec_start < pbp->startmem)
376 pbp->startmem = sec_start;
378 if ((bfd_section_flags (s) & SEC_LOAD))
380 if (sec_end > pbp->end_loadmem)
381 pbp->end_loadmem = sec_end;
383 else if (sec_start < pbp->start_nonloadmem)
384 pbp->start_nonloadmem = sec_start;
388 /* Get the program boundaries. Because not everything is covered by
389 sections in ELF, notably the program headers, we use the program
393 cris_get_progbounds (struct bfd *abfd, struct progbounds *pbp)
395 Elf_Internal_Phdr *phdr;
399 pbp->startmem = 0xffffffff;
401 pbp->end_loadmem = 0;
402 pbp->start_nonloadmem = 0xffffffff;
404 /* In case we're ever used for something other than ELF, use the
406 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
408 bfd_map_over_sections (abfd, get_progbounds_iterator, pbp);
412 phdr = elf_tdata (abfd)->phdr;
413 n_hdrs = elf_elfheader (abfd)->e_phnum;
415 /* We're only interested in PT_LOAD; all necessary information
416 should be covered by that. */
417 for (i = 0; i < n_hdrs; i++)
419 if (phdr[i].p_type != PT_LOAD)
422 if (phdr[i].p_paddr < pbp->startmem)
423 pbp->startmem = phdr[i].p_paddr;
425 if (phdr[i].p_paddr + phdr[i].p_memsz > pbp->endmem)
426 pbp->endmem = phdr[i].p_paddr + phdr[i].p_memsz;
428 if (phdr[i].p_paddr + phdr[i].p_filesz > pbp->end_loadmem)
429 pbp->end_loadmem = phdr[i].p_paddr + phdr[i].p_filesz;
431 if (phdr[i].p_memsz > phdr[i].p_filesz
432 && phdr[i].p_paddr + phdr[i].p_filesz < pbp->start_nonloadmem)
433 pbp->start_nonloadmem = phdr[i].p_paddr + phdr[i].p_filesz;
437 /* Parameter communication by static variables, hmm... Oh well, for
439 static bfd_vma exec_load_addr;
440 static bfd_vma interp_load_addr;
441 static bfd_vma interp_start_addr;
443 /* Supposed to mimic Linux' "NEW_AUX_ENT (AT_PHDR, load_addr + exec->e_phoff)". */
446 aux_ent_phdr (struct bfd *ebfd)
448 return elf_elfheader (ebfd)->e_phoff + exec_load_addr;
451 /* We just pass on the header info; we don't have our own idea of the
452 program header entry size. */
455 aux_ent_phent (struct bfd *ebfd)
457 return elf_elfheader (ebfd)->e_phentsize;
460 /* Like "NEW_AUX_ENT(AT_PHNUM, exec->e_phnum)". */
463 aux_ent_phnum (struct bfd *ebfd)
465 return elf_elfheader (ebfd)->e_phnum;
468 /* Like "NEW_AUX_ENT(AT_BASE, interp_load_addr)". */
471 aux_ent_base (struct bfd *ebfd)
473 return interp_load_addr;
476 /* Like "NEW_AUX_ENT(AT_ENTRY, exec->e_entry)". */
479 aux_ent_entry (struct bfd *ebfd)
481 ASSERT (elf_elfheader (ebfd)->e_entry == bfd_get_start_address (ebfd));
482 return elf_elfheader (ebfd)->e_entry;
485 /* Helper for cris_handle_interpreter: like sim_write, but load at
486 interp_load_addr offset. */
489 cris_write_interp (SIM_DESC sd, SIM_ADDR mem, const void *buf, int length)
491 return sim_write (sd, mem + interp_load_addr, buf, length);
494 /* Cater to the presence of an interpreter: load it and set
495 interp_start_addr. Return FALSE if there was an error, TRUE if
496 everything went fine, including an interpreter being absent and
497 the program being in a non-ELF format. */
500 cris_handle_interpreter (SIM_DESC sd, struct bfd *abfd)
506 bfd_boolean ok = FALSE;
507 Elf_Internal_Phdr *phdr;
509 if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
512 phdr = elf_tdata (abfd)->phdr;
513 n_hdrs = aux_ent_phnum (abfd);
515 /* Check the program headers for presence of an interpreter. */
516 for (i = 0; i < n_hdrs; i++)
519 bfd_size_type interpsiz, interp_filesiz;
520 struct progbounds interp_bounds;
522 if (phdr[i].p_type != PT_INTERP)
525 /* Get the name of the interpreter, prepended with the sysroot
526 (empty if absent). */
527 interplen = phdr[i].p_filesz;
528 interp = xmalloc (interplen + strlen (simulator_sysroot));
529 strcpy (interp, simulator_sysroot);
531 /* Read in the name. */
532 if (bfd_seek (abfd, phdr[i].p_offset, SEEK_SET) != 0
533 || (bfd_bread (interp + strlen (simulator_sysroot), interplen, abfd)
535 goto interpname_failed;
537 /* Like Linux, require the string to be 0-terminated. */
538 if (interp[interplen + strlen (simulator_sysroot) - 1] != 0)
539 goto interpname_failed;
541 /* Inspect the interpreter. */
542 ibfd = bfd_openr (interp, STATE_TARGET (sd));
544 goto interpname_failed;
546 /* The interpreter is at least something readable to BFD; make
547 sure it's an ELF non-archive file. */
548 if (!bfd_check_format (ibfd, bfd_object)
549 || bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
552 /* Check the layout of the interpreter. */
553 cris_get_progbounds (ibfd, &interp_bounds);
555 /* Round down to pagesize the start page and up the endpage.
556 Don't round the *load and *nonload members. */
557 interp_bounds.startmem &= ~8191;
558 interp_bounds.endmem = (interp_bounds.endmem + 8191) & ~8191;
560 /* Until we need a more dynamic solution, assume we can put the
561 interpreter at this fixed location. NB: this is not what
562 happens for Linux 2008-12-28, but it could and might and
564 interp_load_addr = 0x40000;
565 interpsiz = interp_bounds.endmem - interp_bounds.startmem;
566 interp_filesiz = interp_bounds.end_loadmem - interp_bounds.startmem;
568 /* If we have a non-DSO or interpreter starting at the wrong
570 if (interp_bounds.startmem != 0
571 || interpsiz + interp_load_addr >= exec_load_addr)
574 /* We don't have the API to get the address of a simulator
575 memory area, so we go via a temporary area. Luckily, the
576 interpreter is supposed to be small, less than 0x40000
578 sim_do_commandf (sd, "memory region 0x%" PRIx64 ",0x%" PRIx64,
579 (uint64_t) interp_load_addr, (uint64_t) interpsiz);
581 /* Now that memory for the interpreter is defined, load it. */
582 if (!cris_load_elf_file (sd, ibfd, cris_write_interp))
585 /* It's no use setting STATE_START_ADDR, because it gets
586 overwritten by a sim_analyze_program call in sim_load. Let's
587 just store it locally. */
589 = (bfd_get_start_address (ibfd)
590 - interp_bounds.startmem + interp_load_addr);
592 /* Linux cares only about the first PT_INTERP, so let's ignore
597 /* Register R10 should hold 0 at static start (no finifunc), but
598 that's the default, so don't bother. */
610 "%s: could not load ELF interpreter `%s' for program `%s'\n",
612 interp == NULL ? "(what's-its-name)" : interp,
613 bfd_get_filename (abfd));
618 extern const SIM_MACH * const cris_sim_machs[];
620 /* Create an instance of the simulator. */
623 sim_open (SIM_OPEN_KIND kind, host_callback *callback, struct bfd *abfd,
629 USI endmem = CRIS_DEFAULT_MEM_SIZE;
632 SIM_DESC sd = sim_state_alloc (kind, callback);
634 static const struct auxv_entries_s
637 USI (*efn) (struct bfd *ebfd);
641 #define AUX_ENT(a, b) {a, NULL, b}
642 #define AUX_ENTF(a, f) {a, f, 0}
643 AUX_ENT (AT_HWCAP, 0),
644 AUX_ENT (AT_PAGESZ, 8192),
645 AUX_ENT (AT_CLKTCK, 100),
646 AUX_ENTF (AT_PHDR, aux_ent_phdr),
647 AUX_ENTF (AT_PHENT, aux_ent_phent),
648 AUX_ENTF (AT_PHNUM, aux_ent_phnum),
649 AUX_ENTF (AT_BASE, aux_ent_base),
650 AUX_ENT (AT_FLAGS, 0),
651 AUX_ENTF (AT_ENTRY, aux_ent_entry),
653 /* Or is root better? Maybe have it settable? */
654 AUX_ENT (AT_UID, 500),
655 AUX_ENT (AT_EUID, 500),
656 AUX_ENT (AT_GID, 500),
657 AUX_ENT (AT_EGID, 500),
658 AUX_ENT (AT_SECURE, 0),
662 /* Can't initialize to "" below. It's either a GCC bug in old
663 releases (up to and including 2.95.3 (.4 in debian) or a bug in the
664 standard ;-) that the rest of the elements won't be initialized. */
665 bfd_byte sp_init[4] = {0, 0, 0, 0};
667 /* Set default options before parsing user options. */
668 STATE_MACHS (sd) = cris_sim_machs;
669 STATE_MODEL_NAME (sd) = "crisv32";
670 current_target_byte_order = BFD_ENDIAN_LITTLE;
672 /* The cpu data is kept in a separately allocated chunk of memory. */
673 if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
679 if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
685 /* Add the CRIS-specific option list to the simulator. */
686 if (sim_add_option_table (sd, NULL, cris_options) != SIM_RC_OK)
692 /* The parser will print an error message for us, so we silently return. */
693 if (sim_parse_args (sd, argv) != SIM_RC_OK)
699 /* check for/establish the reference program image */
700 if (sim_analyze_program (sd, STATE_PROG_FILE (sd), abfd) != SIM_RC_OK)
702 /* When there's an error, sim_analyze_program has already output
703 a message. Let's just clarify it, as "not an object file"
704 perhaps doesn't ring a bell. */
705 sim_io_eprintf (sd, "(not a CRIS program)\n");
710 /* We might get called with the caller expecting us to get hold of
711 the bfd for ourselves, which would happen at the
712 sim_analyze_program call above. */
714 abfd = STATE_PROG_BFD (sd);
716 /* Adjust the addresses of the program at this point. Unfortunately
717 this does not affect ELF program headers, so we have to handle
719 cris_offset_sections (sd, cris_program_offset);
721 if (abfd != NULL && bfd_get_arch (abfd) == bfd_arch_unknown)
723 if (STATE_PROG_FILE (sd) != NULL)
724 sim_io_eprintf (sd, "%s: `%s' is not a CRIS program\n",
725 STATE_MY_NAME (sd), STATE_PROG_FILE (sd));
727 sim_io_eprintf (sd, "%s: program to be run is not a CRIS program\n",
733 /* For CRIS simulator-specific use, we need to find out the bounds of
734 the program as well, which is not done by sim_analyze_program
738 struct progbounds pb;
740 /* The sections should now be accessible using bfd functions. */
741 cris_get_progbounds (abfd, &pb);
743 /* We align the area that the program uses to page boundaries. */
744 startmem = pb.startmem & ~8191;
746 endmem = (endbrk + 8191) & ~8191;
749 /* Find out how much room is needed for the environment and argv, create
750 that memory and fill it. Only do this when there's a program
753 TODO: Move this to sim_create_inferior and use STATE_PROG_ENVP. */
754 if (abfd != NULL && !cris_bare_iron)
756 const char *name = bfd_get_filename (abfd);
757 /* We use these maps to give the same behavior as the old xsim
759 USI envtop = 0x40000000;
760 USI stacktop = 0x3e000000;
763 int len = strlen (name) + 1;
767 char **prog_argv = STATE_PROG_ARGV (sd);
772 /* Count in the environment as well. */
773 for (envc = 0; environ[envc] != NULL; envc++)
774 len += strlen (environ[envc]) + 1;
776 for (i = 0; prog_argv[i] != NULL; my_argc++, i++)
777 len += strlen (prog_argv[i]) + 1;
779 envstart = (envtop - len) & ~8191;
781 /* Create read-only block for the environment strings. */
782 sim_core_attach (sd, NULL, 0, access_read, 0,
783 envstart, (len + 8191) & ~8191,
786 /* This shouldn't happen. */
787 if (envstart < stacktop)
788 stacktop = envstart - 64 * 8192;
792 /* Note that the linux kernel does not correctly compute the storage
793 needs for the static-exe AUX vector. */
795 csp -= ARRAY_SIZE (auxv_entries) * 4 * 2;
797 csp -= (envc + 1) * 4;
798 csp -= (my_argc + 1) * 4;
801 /* Write the target representation of the start-up-value for the
802 stack-pointer suitable for register initialization below. */
803 bfd_putl32 (csp, sp_init);
805 /* If we make this 1M higher; say 8192*1024, we have to take
806 special precautions for pthreads, because pthreads assumes that
807 the memory that low isn't mmapped, and that it can mmap it
808 without fallback in case of failure (and we fail ungracefully
809 long before *that*: the memory isn't accounted for in our mmap
811 stack_low = (csp - (7168*1024)) & ~8191;
813 stacklen = stacktop - stack_low;
815 /* Tee hee, we have an executable stack. Well, it's necessary to
816 test GCC trampolines... */
817 sim_core_attach (sd, NULL, 0, access_read_write_exec, 0,
821 epp = epp0 = envstart;
823 /* Can't use sim_core_write_unaligned_4 without everything
824 initialized when tracing, and then these writes would get into
826 #define write_dword(addr, data) \
831 bfd_putl32 (data_, buf); \
832 if (sim_core_write_buffer (sd, NULL, NULL_CIA, buf, addr_, 4) != 4)\
837 write_dword (csp, my_argc);
840 for (i = 0; i < my_argc; i++, csp += 4)
842 size_t strln = strlen (prog_argv[i]) + 1;
844 if (sim_core_write_buffer (sd, NULL, NULL_CIA, prog_argv[i], epp,
849 write_dword (csp, envstart + epp - epp0);
853 write_dword (csp, 0);
856 for (i = 0; i < envc; i++, csp += 4)
858 unsigned int strln = strlen (environ[i]) + 1;
860 if (sim_core_write_buffer (sd, NULL, NULL_CIA, environ[i], epp, strln)
864 write_dword (csp, envstart + epp - epp0);
868 write_dword (csp, 0);
871 /* The load address of the executable could presumably be
872 different than the lowest used memory address, but let's
873 stick to simplicity until needed. And
874 cris_handle_interpreter might change startmem and endmem, so
876 exec_load_addr = startmem;
878 if (!cris_handle_interpreter (sd, abfd))
881 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
882 for (i = 0; i < ARRAY_SIZE (auxv_entries); i++)
884 write_dword (csp, auxv_entries[i].id);
885 write_dword (csp + 4,
886 auxv_entries[i].efn != NULL
887 ? (*auxv_entries[i].efn) (abfd)
888 : auxv_entries[i].val);
893 /* Allocate core managed memory if none specified by user. */
894 if (sim_core_read_buffer (sd, NULL, read_map, &c, startmem, 1) == 0)
895 sim_do_commandf (sd, "memory region 0x%" PRIx32 ",0x%" PRIx32,
896 startmem, endmem - startmem);
898 /* Allocate simulator I/O managed memory if none specified by user. */
900 if (cris_have_900000xxif)
901 sim_hw_parse (sd, "/core/%s/reg %#x %i", "cris_900000xx", 0x90000000, 0x100);
903 /* With the option disabled, nothing should be able to set this variable.
904 We should "use" it, though, and why not assert that it isn't set. */
905 ASSERT (! cris_have_900000xxif);
908 /* Establish any remaining configuration options. */
909 if (sim_config (sd) != SIM_RC_OK)
916 if (sim_post_argv_init (sd) != SIM_RC_OK)
922 /* Open a copy of the cpu descriptor table. */
924 CGEN_CPU_DESC cd = cris_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
926 for (i = 0; i < MAX_NR_PROCESSORS; ++i)
928 SIM_CPU *cpu = STATE_CPU (sd, i);
929 CPU_CPU_DESC (cpu) = cd;
930 CPU_DISASSEMBLER (cpu) = cris_disassemble_insn;
932 /* See cris_option_handler for the reason why this is needed. */
933 CPU_CRIS_MISC_PROFILE (cpu)->flags = STATE_TRACE_FLAGS (sd)[0];
935 /* Set SP to the stack we allocated above. */
936 (* CPU_REG_STORE (cpu)) (cpu, H_GR_SP, (const unsigned char *) sp_init, 4);
938 /* Set the simulator environment data. */
939 cpu->highest_mmapped_page = NULL;
940 cpu->endmem = endmem;
941 cpu->endbrk = endbrk;
942 cpu->stack_low = stack_low;
946 cpu->max_threadid = 0;
947 cpu->thread_data = NULL;
948 memset (cpu->sighandler, 0, sizeof (cpu->sighandler));
949 cpu->make_thread_cpu_data = NULL;
950 cpu->thread_cpu_data_size = 0;
952 cpu->deliver_interrupt = NULL;
956 /* Always be cycle-accurate and call before/after functions if
958 sim_profile_set_option (sd, "-model", PROFILE_MODEL_IDX, "on");
962 cris_set_callbacks (callback);
968 sim_create_inferior (SIM_DESC sd, struct bfd *abfd,
972 SIM_CPU *current_cpu = STATE_CPU (sd, 0);
973 host_callback *cb = STATE_CALLBACK (sd);
977 addr = cris_start_address != (SIM_ADDR) -1
979 : (interp_start_addr != 0
981 : bfd_get_start_address (abfd));
984 sim_pc_set (current_cpu, addr);
986 /* Standalone mode (i.e. `run`) will take care of the argv for us in
987 sim_open() -> sim_parse_args(). But in debug mode (i.e. 'target sim'
988 with `gdb`), we need to handle it because the user can change the
989 argv on the fly via gdb's 'run'. */
990 if (STATE_PROG_ARGV (sd) != argv)
992 freeargv (STATE_PROG_ARGV (sd));
993 STATE_PROG_ARGV (sd) = dupargv (argv);
996 if (STATE_PROG_ENVP (sd) != env)
998 freeargv (STATE_PROG_ENVP (sd));
999 STATE_PROG_ENVP (sd) = dupargv (env);
1002 cb->argv = STATE_PROG_ARGV (sd);
1003 cb->envp = STATE_PROG_ENVP (sd);
1008 /* Disassemble an instruction. */
1011 cris_disassemble_insn (SIM_CPU *cpu,
1012 const CGEN_INSN *insn ATTRIBUTE_UNUSED,
1013 const ARGBUF *abuf ATTRIBUTE_UNUSED,
1014 IADDR pc, char *buf)
1016 disassembler_ftype pinsn;
1017 struct disassemble_info disasm_info;
1019 SIM_DESC sd = CPU_STATE (cpu);
1021 sfile.buffer = sfile.current = buf;
1022 INIT_DISASSEMBLE_INFO (disasm_info, (FILE *) &sfile,
1023 (fprintf_ftype) sim_disasm_sprintf,
1024 (fprintf_styled_ftype) sim_disasm_styled_sprintf);
1025 disasm_info.endian = BFD_ENDIAN_LITTLE;
1026 disasm_info.read_memory_func = sim_disasm_read_memory;
1027 disasm_info.memory_error_func = sim_disasm_perror_memory;
1028 disasm_info.application_data = cpu;
1029 pinsn = cris_get_disassembler (STATE_PROG_BFD (sd));
1030 (*pinsn) (pc, &disasm_info);