1 /* Main simulator entry points specific to the CRIS.
2 Copyright (C) 2004-2021 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. */
26 #include "libiberty.h"
34 #include "sim-options.h"
39 /* Used with get_progbounds to find out how much memory is needed for the
40 program. We don't want to allocate more, since that could mask
41 invalid memory accesses program bugs. */
49 static void free_state (SIM_DESC
);
50 static void get_progbounds_iterator (bfd
*, asection
*, void *);
51 static SIM_RC
cris_option_handler (SIM_DESC
, sim_cpu
*, int, char *, int);
53 /* Since we don't build the cgen-opcode table, we use the old
55 static CGEN_DISASSEMBLER cris_disassemble_insn
;
57 /* By default, we set up stack and environment variables like the Linux
59 static char cris_bare_iron
= 0;
61 /* Whether 0x9000000xx have simulator-specific meanings. */
62 char cris_have_900000xxif
= 0;
64 /* Used to optionally override the default start address of the
66 static USI cris_start_address
= 0xffffffffu
;
68 /* Used to optionally add offsets to the loaded image and its start
69 address. (Not used for the interpreter of dynamically loaded
70 programs or the DSO:s.) */
71 static int cris_program_offset
= 0;
73 /* What to do when we face a more or less unknown syscall. */
74 enum cris_unknown_syscall_action_type cris_unknown_syscall_action
75 = CRIS_USYSC_MSG_STOP
;
77 /* CRIS-specific options. */
79 OPTION_CRIS_STATS
= OPTION_START
,
82 OPTION_CRIS_PROGRAM_OFFSET
,
83 OPTION_CRIS_STARTADDR
,
84 OPTION_CRIS_900000XXIF
,
85 OPTION_CRIS_UNKNOWN_SYSCALL
88 static const OPTION cris_options
[] =
90 { {"cris-cycles", required_argument
, NULL
, OPTION_CRIS_STATS
},
91 '\0', "basic|unaligned|schedulable|all",
92 "Dump execution statistics",
93 cris_option_handler
, NULL
},
94 { {"cris-trace", required_argument
, NULL
, OPTION_CRIS_TRACE
},
96 "Emit trace information while running",
97 cris_option_handler
, NULL
},
98 { {"cris-naked", no_argument
, NULL
, OPTION_CRIS_NAKED
},
99 '\0', NULL
, "Don't set up stack and environment",
100 cris_option_handler
, NULL
},
101 { {"cris-900000xx", no_argument
, NULL
, OPTION_CRIS_900000XXIF
},
102 '\0', NULL
, "Define addresses at 0x900000xx with simulator semantics",
103 cris_option_handler
, NULL
},
104 { {"cris-unknown-syscall", required_argument
, NULL
,
105 OPTION_CRIS_UNKNOWN_SYSCALL
},
106 '\0', "stop|enosys|enosys-quiet", "Action at an unknown system call",
107 cris_option_handler
, NULL
},
108 { {"cris-program-offset", required_argument
, NULL
,
109 OPTION_CRIS_PROGRAM_OFFSET
},
111 "Offset image addresses and default start address of a program",
112 cris_option_handler
},
113 { {"cris-start-address", required_argument
, NULL
, OPTION_CRIS_STARTADDR
},
114 '\0', "ADDRESS", "Set start address",
115 cris_option_handler
},
116 { {NULL
, no_argument
, NULL
, 0}, '\0', NULL
, NULL
, NULL
, NULL
}
119 /* Handle CRIS-specific options. */
122 cris_option_handler (SIM_DESC sd
, sim_cpu
*cpu ATTRIBUTE_UNUSED
, int opt
,
123 char *arg
, int is_command ATTRIBUTE_UNUSED
)
125 /* The options are CRIS-specific, but cpu-specific option-handling is
126 broken; required to being with "--cpu0-". We store the flags in an
127 unused field in the global state structure and move the flags over
128 to the module-specific CPU data when we store things in the
129 cpu-specific structure. */
130 char *tracefp
= STATE_TRACE_FLAGS (sd
);
133 switch ((CRIS_OPTIONS
) opt
)
135 case OPTION_CRIS_STATS
:
136 if (strcmp (arg
, "basic") == 0)
137 *tracefp
= FLAG_CRIS_MISC_PROFILE_SIMPLE
;
138 else if (strcmp (arg
, "unaligned") == 0)
140 = (FLAG_CRIS_MISC_PROFILE_UNALIGNED
141 | FLAG_CRIS_MISC_PROFILE_SIMPLE
);
142 else if (strcmp (arg
, "schedulable") == 0)
144 = (FLAG_CRIS_MISC_PROFILE_SCHEDULABLE
145 | FLAG_CRIS_MISC_PROFILE_SIMPLE
);
146 else if (strcmp (arg
, "all") == 0)
147 *tracefp
= FLAG_CRIS_MISC_PROFILE_ALL
;
150 /* Beware; the framework does not handle the error case;
151 we have to do it ourselves. */
152 sim_io_eprintf (sd
, "Unknown option `--cris-cycles=%s'\n", arg
);
157 case OPTION_CRIS_TRACE
:
158 if (strcmp (arg
, "basic") == 0)
159 *tracefp
|= FLAG_CRIS_MISC_PROFILE_XSIM_TRACE
;
162 sim_io_eprintf (sd
, "Unknown option `--cris-trace=%s'\n", arg
);
167 case OPTION_CRIS_NAKED
:
171 case OPTION_CRIS_900000XXIF
:
172 cris_have_900000xxif
= 1;
175 case OPTION_CRIS_STARTADDR
:
177 cris_start_address
= (USI
) strtoul (chp
, &chp
, 0);
179 if (errno
!= 0 || *chp
!= 0)
181 sim_io_eprintf (sd
, "Invalid option `--cris-start-address=%s'\n",
187 case OPTION_CRIS_PROGRAM_OFFSET
:
189 cris_program_offset
= (int) strtol (chp
, &chp
, 0);
191 if (errno
!= 0 || *chp
!= 0)
193 sim_io_eprintf (sd
, "Invalid option `--cris-program-offset=%s'\n",
199 case OPTION_CRIS_UNKNOWN_SYSCALL
:
200 if (strcmp (arg
, "enosys") == 0)
201 cris_unknown_syscall_action
= CRIS_USYSC_MSG_ENOSYS
;
202 else if (strcmp (arg
, "enosys-quiet") == 0)
203 cris_unknown_syscall_action
= CRIS_USYSC_QUIET_ENOSYS
;
204 else if (strcmp (arg
, "stop") == 0)
205 cris_unknown_syscall_action
= CRIS_USYSC_MSG_STOP
;
208 sim_io_eprintf (sd
, "Unknown option `--cris-unknown-syscall=%s'\n",
215 /* We'll actually never get here; the caller handles the error
217 sim_io_eprintf (sd
, "Unknown option `%s'\n", arg
);
221 /* Imply --profile-model=on. */
222 return sim_profile_set_option (sd
, "-model", PROFILE_MODEL_IDX
, "on");
225 /* An ELF-specific simplified ../common/sim-load.c:sim_load_file,
226 using the program headers, not sections, in order to make sure that
227 the program headers themeselves are also loaded. The caller is
228 responsible for asserting that ABFD is an ELF file. */
231 cris_load_elf_file (SIM_DESC sd
, struct bfd
*abfd
, sim_write_fn do_write
)
233 Elf_Internal_Phdr
*phdr
;
236 bfd_boolean verbose
= STATE_OPEN_KIND (sd
) == SIM_OPEN_DEBUG
;
238 phdr
= elf_tdata (abfd
)->phdr
;
239 n_hdrs
= elf_elfheader (abfd
)->e_phnum
;
241 /* We're only interested in PT_LOAD; all necessary information
242 should be covered by that. */
243 for (i
= 0; i
< n_hdrs
; i
++)
246 bfd_vma lma
= STATE_LOAD_AT_LMA_P (sd
)
247 ? phdr
[i
].p_paddr
: phdr
[i
].p_vaddr
;
249 if (phdr
[i
].p_type
!= PT_LOAD
)
252 buf
= xmalloc (phdr
[i
].p_filesz
);
256 "Loading segment at 0x%" BFD_VMA_FMT
"x, size 0x%lx\n",
257 lma
, phdr
[i
].p_filesz
);
259 if (bfd_seek (abfd
, phdr
[i
].p_offset
, SEEK_SET
) != 0
260 || (bfd_bread (buf
, phdr
[i
].p_filesz
, abfd
) != phdr
[i
].p_filesz
))
263 "%s: could not read segment at 0x%" BFD_VMA_FMT
"x, "
265 STATE_MY_NAME (sd
), lma
, phdr
[i
].p_filesz
);
270 if (do_write (sd
, lma
, buf
, phdr
[i
].p_filesz
) != phdr
[i
].p_filesz
)
273 "%s: could not load segment at 0x%" BFD_VMA_FMT
"x, "
275 STATE_MY_NAME (sd
), lma
, phdr
[i
].p_filesz
);
286 /* Cover function of sim_state_free to free the cpu buffers as well. */
289 free_state (SIM_DESC sd
)
291 if (STATE_MODULES (sd
) != NULL
)
292 sim_module_uninstall (sd
);
293 sim_cpu_free_all (sd
);
297 /* Helper struct for cris_set_section_offset_iterator. */
305 /* BFD section iterator to offset the LMA and VMA. */
308 cris_set_section_offset_iterator (bfd
*abfd
, asection
*s
, void *vp
)
310 struct offsetinfo
*p
= (struct offsetinfo
*) vp
;
312 int offset
= p
->offset
;
314 if ((bfd_section_flags (s
) & SEC_ALLOC
))
316 bfd_vma vma
= bfd_section_vma (s
);
318 bfd_set_section_vma (s
, vma
+ offset
);
321 /* This seems clumsy and inaccurate, but let's stick to doing it the
322 same way as sim_analyze_program for consistency. */
323 if (strcmp (bfd_section_name (s
), ".text") == 0)
324 STATE_TEXT_START (sd
) = bfd_section_vma (s
);
327 /* Adjust the start-address, LMA and VMA of a SD. Must be called
328 after sim_analyze_program. */
331 cris_offset_sections (SIM_DESC sd
, int offset
)
334 struct bfd
*abfd
= STATE_PROG_BFD (sd
);
336 struct offsetinfo oi
;
338 /* Only happens for usage error. */
345 bfd_map_over_sections (abfd
, cris_set_section_offset_iterator
, &oi
);
346 ret
= bfd_set_start_address (abfd
, bfd_get_start_address (abfd
) + offset
);
348 STATE_START_ADDR (sd
) = bfd_get_start_address (abfd
);
351 /* BFD section iterator to find the highest and lowest allocated and
352 non-allocated section addresses (plus one). */
355 get_progbounds_iterator (bfd
*abfd ATTRIBUTE_UNUSED
, asection
*s
, void *vp
)
357 struct progbounds
*pbp
= (struct progbounds
*) vp
;
359 if ((bfd_section_flags (s
) & SEC_ALLOC
))
361 bfd_size_type sec_size
= bfd_section_size (s
);
362 bfd_size_type sec_start
= bfd_section_vma (s
);
363 bfd_size_type sec_end
= sec_start
+ sec_size
;
365 if (sec_end
> pbp
->endmem
)
366 pbp
->endmem
= sec_end
;
368 if (sec_start
< pbp
->startmem
)
369 pbp
->startmem
= sec_start
;
371 if ((bfd_section_flags (s
) & SEC_LOAD
))
373 if (sec_end
> pbp
->end_loadmem
)
374 pbp
->end_loadmem
= sec_end
;
376 else if (sec_start
< pbp
->start_nonloadmem
)
377 pbp
->start_nonloadmem
= sec_start
;
381 /* Get the program boundaries. Because not everything is covered by
382 sections in ELF, notably the program headers, we use the program
386 cris_get_progbounds (struct bfd
*abfd
, struct progbounds
*pbp
)
388 Elf_Internal_Phdr
*phdr
;
392 pbp
->startmem
= 0xffffffff;
394 pbp
->end_loadmem
= 0;
395 pbp
->start_nonloadmem
= 0xffffffff;
397 /* In case we're ever used for something other than ELF, use the
399 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
401 bfd_map_over_sections (abfd
, get_progbounds_iterator
, pbp
);
405 phdr
= elf_tdata (abfd
)->phdr
;
406 n_hdrs
= elf_elfheader (abfd
)->e_phnum
;
408 /* We're only interested in PT_LOAD; all necessary information
409 should be covered by that. */
410 for (i
= 0; i
< n_hdrs
; i
++)
412 if (phdr
[i
].p_type
!= PT_LOAD
)
415 if (phdr
[i
].p_paddr
< pbp
->startmem
)
416 pbp
->startmem
= phdr
[i
].p_paddr
;
418 if (phdr
[i
].p_paddr
+ phdr
[i
].p_memsz
> pbp
->endmem
)
419 pbp
->endmem
= phdr
[i
].p_paddr
+ phdr
[i
].p_memsz
;
421 if (phdr
[i
].p_paddr
+ phdr
[i
].p_filesz
> pbp
->end_loadmem
)
422 pbp
->end_loadmem
= phdr
[i
].p_paddr
+ phdr
[i
].p_filesz
;
424 if (phdr
[i
].p_memsz
> phdr
[i
].p_filesz
425 && phdr
[i
].p_paddr
+ phdr
[i
].p_filesz
< pbp
->start_nonloadmem
)
426 pbp
->start_nonloadmem
= phdr
[i
].p_paddr
+ phdr
[i
].p_filesz
;
430 /* Parameter communication by static variables, hmm... Oh well, for
432 static bfd_vma exec_load_addr
;
433 static bfd_vma interp_load_addr
;
434 static bfd_vma interp_start_addr
;
436 /* Supposed to mimic Linux' "NEW_AUX_ENT (AT_PHDR, load_addr + exec->e_phoff)". */
439 aux_ent_phdr (struct bfd
*ebfd
)
441 return elf_elfheader (ebfd
)->e_phoff
+ exec_load_addr
;
444 /* We just pass on the header info; we don't have our own idea of the
445 program header entry size. */
448 aux_ent_phent (struct bfd
*ebfd
)
450 return elf_elfheader (ebfd
)->e_phentsize
;
453 /* Like "NEW_AUX_ENT(AT_PHNUM, exec->e_phnum)". */
456 aux_ent_phnum (struct bfd
*ebfd
)
458 return elf_elfheader (ebfd
)->e_phnum
;
461 /* Like "NEW_AUX_ENT(AT_BASE, interp_load_addr)". */
464 aux_ent_base (struct bfd
*ebfd
)
466 return interp_load_addr
;
469 /* Like "NEW_AUX_ENT(AT_ENTRY, exec->e_entry)". */
472 aux_ent_entry (struct bfd
*ebfd
)
474 ASSERT (elf_elfheader (ebfd
)->e_entry
== bfd_get_start_address (ebfd
));
475 return elf_elfheader (ebfd
)->e_entry
;
478 /* Helper for cris_handle_interpreter: like sim_write, but load at
479 interp_load_addr offset. */
482 cris_write_interp (SIM_DESC sd
, SIM_ADDR mem
, const unsigned char *buf
, int length
)
484 return sim_write (sd
, mem
+ interp_load_addr
, buf
, length
);
487 /* Cater to the presence of an interpreter: load it and set
488 interp_start_addr. Return FALSE if there was an error, TRUE if
489 everything went fine, including an interpreter being absent and
490 the program being in a non-ELF format. */
493 cris_handle_interpreter (SIM_DESC sd
, struct bfd
*abfd
)
499 bfd_boolean ok
= FALSE
;
500 Elf_Internal_Phdr
*phdr
;
502 if (bfd_get_flavour (abfd
) != bfd_target_elf_flavour
)
505 phdr
= elf_tdata (abfd
)->phdr
;
506 n_hdrs
= aux_ent_phnum (abfd
);
508 /* Check the program headers for presence of an interpreter. */
509 for (i
= 0; i
< n_hdrs
; i
++)
512 bfd_size_type interpsiz
, interp_filesiz
;
513 struct progbounds interp_bounds
;
515 if (phdr
[i
].p_type
!= PT_INTERP
)
518 /* Get the name of the interpreter, prepended with the sysroot
519 (empty if absent). */
520 interplen
= phdr
[i
].p_filesz
;
521 interp
= xmalloc (interplen
+ strlen (simulator_sysroot
));
522 strcpy (interp
, simulator_sysroot
);
524 /* Read in the name. */
525 if (bfd_seek (abfd
, phdr
[i
].p_offset
, SEEK_SET
) != 0
526 || (bfd_bread (interp
+ strlen (simulator_sysroot
), interplen
, abfd
)
528 goto interpname_failed
;
530 /* Like Linux, require the string to be 0-terminated. */
531 if (interp
[interplen
+ strlen (simulator_sysroot
) - 1] != 0)
532 goto interpname_failed
;
534 /* Inspect the interpreter. */
535 ibfd
= bfd_openr (interp
, STATE_TARGET (sd
));
537 goto interpname_failed
;
539 /* The interpreter is at least something readable to BFD; make
540 sure it's an ELF non-archive file. */
541 if (!bfd_check_format (ibfd
, bfd_object
)
542 || bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
545 /* Check the layout of the interpreter. */
546 cris_get_progbounds (ibfd
, &interp_bounds
);
548 /* Round down to pagesize the start page and up the endpage.
549 Don't round the *load and *nonload members. */
550 interp_bounds
.startmem
&= ~8191;
551 interp_bounds
.endmem
= (interp_bounds
.endmem
+ 8191) & ~8191;
553 /* Until we need a more dynamic solution, assume we can put the
554 interpreter at this fixed location. NB: this is not what
555 happens for Linux 2008-12-28, but it could and might and
557 interp_load_addr
= 0x40000;
558 interpsiz
= interp_bounds
.endmem
- interp_bounds
.startmem
;
559 interp_filesiz
= interp_bounds
.end_loadmem
- interp_bounds
.startmem
;
561 /* If we have a non-DSO or interpreter starting at the wrong
563 if (interp_bounds
.startmem
!= 0
564 || interpsiz
+ interp_load_addr
>= exec_load_addr
)
567 /* We don't have the API to get the address of a simulator
568 memory area, so we go via a temporary area. Luckily, the
569 interpreter is supposed to be small, less than 0x40000
571 sim_do_commandf (sd
, "memory region 0x%" BFD_VMA_FMT
"x,0x%lx",
572 interp_load_addr
, interpsiz
);
574 /* Now that memory for the interpreter is defined, load it. */
575 if (!cris_load_elf_file (sd
, ibfd
, cris_write_interp
))
578 /* It's no use setting STATE_START_ADDR, because it gets
579 overwritten by a sim_analyze_program call in sim_load. Let's
580 just store it locally. */
582 = (bfd_get_start_address (ibfd
)
583 - interp_bounds
.startmem
+ interp_load_addr
);
585 /* Linux cares only about the first PT_INTERP, so let's ignore
590 /* Register R10 should hold 0 at static start (no finifunc), but
591 that's the default, so don't bother. */
603 "%s: could not load ELF interpreter `%s' for program `%s'\n",
605 interp
== NULL
? "(what's-its-name)" : interp
,
606 bfd_get_filename (abfd
));
611 /* Create an instance of the simulator. */
614 sim_open (SIM_OPEN_KIND kind
, host_callback
*callback
, struct bfd
*abfd
,
620 USI endmem
= CRIS_DEFAULT_MEM_SIZE
;
623 SIM_DESC sd
= sim_state_alloc (kind
, callback
);
625 static const struct auxv_entries_s
628 USI (*efn
) (struct bfd
*ebfd
);
632 #define AUX_ENT(a, b) {a, NULL, b}
633 #define AUX_ENTF(a, f) {a, f, 0}
634 AUX_ENT (AT_HWCAP
, 0),
635 AUX_ENT (AT_PAGESZ
, 8192),
636 AUX_ENT (AT_CLKTCK
, 100),
637 AUX_ENTF (AT_PHDR
, aux_ent_phdr
),
638 AUX_ENTF (AT_PHENT
, aux_ent_phent
),
639 AUX_ENTF (AT_PHNUM
, aux_ent_phnum
),
640 AUX_ENTF (AT_BASE
, aux_ent_base
),
641 AUX_ENT (AT_FLAGS
, 0),
642 AUX_ENTF (AT_ENTRY
, aux_ent_entry
),
644 /* Or is root better? Maybe have it settable? */
645 AUX_ENT (AT_UID
, 500),
646 AUX_ENT (AT_EUID
, 500),
647 AUX_ENT (AT_GID
, 500),
648 AUX_ENT (AT_EGID
, 500),
649 AUX_ENT (AT_SECURE
, 0),
653 /* Can't initialize to "" below. It's either a GCC bug in old
654 releases (up to and including 2.95.3 (.4 in debian) or a bug in the
655 standard ;-) that the rest of the elements won't be initialized. */
656 bfd_byte sp_init
[4] = {0, 0, 0, 0};
658 /* Set default options before parsing user options. */
659 current_target_byte_order
= BFD_ENDIAN_LITTLE
;
661 /* The cpu data is kept in a separately allocated chunk of memory. */
662 if (sim_cpu_alloc_all (sd
, 1) != SIM_RC_OK
)
668 if (sim_pre_argv_init (sd
, argv
[0]) != SIM_RC_OK
)
674 /* Add the CRIS-specific option list to the simulator. */
675 if (sim_add_option_table (sd
, NULL
, cris_options
) != SIM_RC_OK
)
681 /* The parser will print an error message for us, so we silently return. */
682 if (sim_parse_args (sd
, argv
) != SIM_RC_OK
)
688 /* check for/establish the reference program image */
689 if (sim_analyze_program (sd
,
690 (STATE_PROG_ARGV (sd
) != NULL
691 ? *STATE_PROG_ARGV (sd
)
695 /* When there's an error, sim_analyze_program has already output
696 a message. Let's just clarify it, as "not an object file"
697 perhaps doesn't ring a bell. */
698 sim_io_eprintf (sd
, "(not a CRIS program)\n");
703 /* We might get called with the caller expecting us to get hold of
704 the bfd for ourselves, which would happen at the
705 sim_analyze_program call above. */
707 abfd
= STATE_PROG_BFD (sd
);
709 /* Adjust the addresses of the program at this point. Unfortunately
710 this does not affect ELF program headers, so we have to handle
712 cris_offset_sections (sd
, cris_program_offset
);
714 if (abfd
!= NULL
&& bfd_get_arch (abfd
) == bfd_arch_unknown
)
716 if (STATE_PROG_ARGV (sd
) != NULL
)
717 sim_io_eprintf (sd
, "%s: `%s' is not a CRIS program\n",
718 STATE_MY_NAME (sd
), *STATE_PROG_ARGV (sd
));
720 sim_io_eprintf (sd
, "%s: program to be run is not a CRIS program\n",
726 /* For CRIS simulator-specific use, we need to find out the bounds of
727 the program as well, which is not done by sim_analyze_program
731 struct progbounds pb
;
733 /* The sections should now be accessible using bfd functions. */
734 cris_get_progbounds (abfd
, &pb
);
736 /* We align the area that the program uses to page boundaries. */
737 startmem
= pb
.startmem
& ~8191;
739 endmem
= (endbrk
+ 8191) & ~8191;
742 /* Find out how much room is needed for the environment and argv, create
743 that memory and fill it. Only do this when there's a program
745 if (abfd
!= NULL
&& !cris_bare_iron
)
747 const char *name
= bfd_get_filename (abfd
);
748 /* We use these maps to give the same behavior as the old xsim
750 USI envtop
= 0x40000000;
751 USI stacktop
= 0x3e000000;
754 int len
= strlen (name
) + 1;
758 char **prog_argv
= STATE_PROG_ARGV (sd
);
763 /* Count in the environment as well. */
764 for (envc
= 0; environ
[envc
] != NULL
; envc
++)
765 len
+= strlen (environ
[envc
]) + 1;
767 for (i
= 0; prog_argv
[i
] != NULL
; my_argc
++, i
++)
768 len
+= strlen (prog_argv
[i
]) + 1;
770 envstart
= (envtop
- len
) & ~8191;
772 /* Create read-only block for the environment strings. */
773 sim_core_attach (sd
, NULL
, 0, access_read
, 0,
774 envstart
, (len
+ 8191) & ~8191,
777 /* This shouldn't happen. */
778 if (envstart
< stacktop
)
779 stacktop
= envstart
- 64 * 8192;
783 /* Note that the linux kernel does not correctly compute the storage
784 needs for the static-exe AUX vector. */
786 csp
-= ARRAY_SIZE (auxv_entries
) * 4 * 2;
788 csp
-= (envc
+ 1) * 4;
789 csp
-= (my_argc
+ 1) * 4;
792 /* Write the target representation of the start-up-value for the
793 stack-pointer suitable for register initialization below. */
794 bfd_putl32 (csp
, sp_init
);
796 /* If we make this 1M higher; say 8192*1024, we have to take
797 special precautions for pthreads, because pthreads assumes that
798 the memory that low isn't mmapped, and that it can mmap it
799 without fallback in case of failure (and we fail ungracefully
800 long before *that*: the memory isn't accounted for in our mmap
802 stack_low
= (csp
- (7168*1024)) & ~8191;
804 stacklen
= stacktop
- stack_low
;
806 /* Tee hee, we have an executable stack. Well, it's necessary to
807 test GCC trampolines... */
808 sim_core_attach (sd
, NULL
, 0, access_read_write_exec
, 0,
812 epp
= epp0
= envstart
;
814 /* Can't use sim_core_write_unaligned_4 without everything
815 initialized when tracing, and then these writes would get into
817 #define write_dword(addr, data) \
822 bfd_putl32 (data_, buf); \
823 if (sim_core_write_buffer (sd, NULL, NULL_CIA, buf, addr_, 4) != 4)\
828 write_dword (csp
, my_argc
);
831 for (i
= 0; i
< my_argc
; i
++, csp
+= 4)
833 size_t strln
= strlen (prog_argv
[i
]) + 1;
835 if (sim_core_write_buffer (sd
, NULL
, NULL_CIA
, prog_argv
[i
], epp
,
840 write_dword (csp
, envstart
+ epp
- epp0
);
844 write_dword (csp
, 0);
847 for (i
= 0; i
< envc
; i
++, csp
+= 4)
849 unsigned int strln
= strlen (environ
[i
]) + 1;
851 if (sim_core_write_buffer (sd
, NULL
, NULL_CIA
, environ
[i
], epp
, strln
)
855 write_dword (csp
, envstart
+ epp
- epp0
);
859 write_dword (csp
, 0);
862 /* The load address of the executable could presumably be
863 different than the lowest used memory address, but let's
864 stick to simplicity until needed. And
865 cris_handle_interpreter might change startmem and endmem, so
867 exec_load_addr
= startmem
;
869 if (!cris_handle_interpreter (sd
, abfd
))
872 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
)
873 for (i
= 0; i
< ARRAY_SIZE (auxv_entries
); i
++)
875 write_dword (csp
, auxv_entries
[i
].id
);
876 write_dword (csp
+ 4,
877 auxv_entries
[i
].efn
!= NULL
878 ? (*auxv_entries
[i
].efn
) (abfd
)
879 : auxv_entries
[i
].val
);
884 /* Allocate core managed memory if none specified by user. */
885 if (sim_core_read_buffer (sd
, NULL
, read_map
, &c
, startmem
, 1) == 0)
886 sim_do_commandf (sd
, "memory region 0x%" PRIx32
",0x%" PRIu32
,
887 startmem
, endmem
- startmem
);
889 /* Allocate simulator I/O managed memory if none specified by user. */
890 if (cris_have_900000xxif
)
891 sim_hw_parse (sd
, "/core/%s/reg %#x %i", "cris_900000xx", 0x90000000, 0x100);
893 /* Establish any remaining configuration options. */
894 if (sim_config (sd
) != SIM_RC_OK
)
901 if (sim_post_argv_init (sd
) != SIM_RC_OK
)
907 /* Open a copy of the cpu descriptor table. */
909 CGEN_CPU_DESC cd
= cris_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd
)->printable_name
,
911 for (i
= 0; i
< MAX_NR_PROCESSORS
; ++i
)
913 SIM_CPU
*cpu
= STATE_CPU (sd
, i
);
914 CPU_CPU_DESC (cpu
) = cd
;
915 CPU_DISASSEMBLER (cpu
) = cris_disassemble_insn
;
917 /* See cris_option_handler for the reason why this is needed. */
918 CPU_CRIS_MISC_PROFILE (cpu
)->flags
= STATE_TRACE_FLAGS (sd
)[0];
920 /* Set SP to the stack we allocated above. */
921 (* CPU_REG_STORE (cpu
)) (cpu
, H_GR_SP
, (unsigned char *) sp_init
, 4);
923 /* Set the simulator environment data. */
924 cpu
->highest_mmapped_page
= NULL
;
925 cpu
->endmem
= endmem
;
926 cpu
->endbrk
= endbrk
;
927 cpu
->stack_low
= stack_low
;
931 cpu
->max_threadid
= 0;
932 cpu
->thread_data
= NULL
;
933 memset (cpu
->sighandler
, 0, sizeof (cpu
->sighandler
));
934 cpu
->make_thread_cpu_data
= NULL
;
935 cpu
->thread_cpu_data_size
= 0;
937 cpu
->deliver_interrupt
= NULL
;
941 /* Always be cycle-accurate and call before/after functions if
943 sim_profile_set_option (sd
, "-model", PROFILE_MODEL_IDX
, "on");
947 cris_set_callbacks (callback
);
953 sim_create_inferior (SIM_DESC sd
, struct bfd
*abfd
,
954 char * const *argv ATTRIBUTE_UNUSED
,
955 char * const *envp ATTRIBUTE_UNUSED
)
957 SIM_CPU
*current_cpu
= STATE_CPU (sd
, 0);
961 addr
= cris_start_address
!= (SIM_ADDR
) -1
963 : (interp_start_addr
!= 0
965 : bfd_get_start_address (abfd
));
968 sim_pc_set (current_cpu
, addr
);
970 /* Standalone mode (i.e. `run`) will take care of the argv for us in
971 sim_open() -> sim_parse_args(). But in debug mode (i.e. 'target sim'
972 with `gdb`), we need to handle it because the user can change the
973 argv on the fly via gdb's 'run'. */
974 if (STATE_PROG_ARGV (sd
) != argv
)
976 freeargv (STATE_PROG_ARGV (sd
));
977 STATE_PROG_ARGV (sd
) = dupargv (argv
);
983 /* Disassemble an instruction. */
986 cris_disassemble_insn (SIM_CPU
*cpu
,
987 const CGEN_INSN
*insn ATTRIBUTE_UNUSED
,
988 const ARGBUF
*abuf ATTRIBUTE_UNUSED
,
991 disassembler_ftype pinsn
;
992 struct disassemble_info disasm_info
;
994 SIM_DESC sd
= CPU_STATE (cpu
);
996 sfile
.buffer
= sfile
.current
= buf
;
997 INIT_DISASSEMBLE_INFO (disasm_info
, (FILE *) &sfile
,
998 (fprintf_ftype
) sim_disasm_sprintf
);
999 disasm_info
.endian
= BFD_ENDIAN_LITTLE
;
1000 disasm_info
.read_memory_func
= sim_disasm_read_memory
;
1001 disasm_info
.memory_error_func
= sim_disasm_perror_memory
;
1002 disasm_info
.application_data
= (PTR
) cpu
;
1003 pinsn
= cris_get_disassembler (STATE_PROG_BFD (sd
));
1004 (*pinsn
) (pc
, &disasm_info
);