77cf2ef5dc
Fix a long standing todo where we let getopt write directly to stderr when an invalid option is passed. Use the sim io funcs instead as they go through the filtered callbacks that gdb wants.
236 lines
6.1 KiB
C
236 lines
6.1 KiB
C
/* Main simulator entry points specific to Lattice Mico32.
|
||
Contributed by Jon Beniston <jon@beniston.com>
|
||
|
||
Copyright (C) 2009-2016 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
||
|
||
#include "sim-main.h"
|
||
#include "sim-options.h"
|
||
#include "libiberty.h"
|
||
#include "bfd.h"
|
||
|
||
#ifdef HAVE_STDLIB_H
|
||
#include <stdlib.h>
|
||
#endif
|
||
|
||
/* Cover function of sim_state_free to free the cpu buffers as well. */
|
||
|
||
static void
|
||
free_state (SIM_DESC sd)
|
||
{
|
||
if (STATE_MODULES (sd) != NULL)
|
||
sim_module_uninstall (sd);
|
||
sim_cpu_free_all (sd);
|
||
sim_state_free (sd);
|
||
}
|
||
|
||
/* Find memory range used by program. */
|
||
|
||
static unsigned long
|
||
find_base (bfd *prog_bfd)
|
||
{
|
||
int found;
|
||
unsigned long base = ~(0UL);
|
||
asection *s;
|
||
|
||
found = 0;
|
||
for (s = prog_bfd->sections; s; s = s->next)
|
||
{
|
||
if ((strcmp (bfd_get_section_name (prog_bfd, s), ".boot") == 0)
|
||
|| (strcmp (bfd_get_section_name (prog_bfd, s), ".text") == 0)
|
||
|| (strcmp (bfd_get_section_name (prog_bfd, s), ".data") == 0)
|
||
|| (strcmp (bfd_get_section_name (prog_bfd, s), ".bss") == 0))
|
||
{
|
||
if (!found)
|
||
{
|
||
base = bfd_get_section_vma (prog_bfd, s);
|
||
found = 1;
|
||
}
|
||
else
|
||
base =
|
||
bfd_get_section_vma (prog_bfd,
|
||
s) < base ? bfd_get_section_vma (prog_bfd,
|
||
s) : base;
|
||
}
|
||
}
|
||
return base & ~(0xffffUL);
|
||
}
|
||
|
||
static unsigned long
|
||
find_limit (bfd *prog_bfd)
|
||
{
|
||
struct bfd_symbol **asymbols;
|
||
long symsize;
|
||
long symbol_count;
|
||
long s;
|
||
|
||
symsize = bfd_get_symtab_upper_bound (prog_bfd);
|
||
if (symsize < 0)
|
||
return 0;
|
||
asymbols = (asymbol **) xmalloc (symsize);
|
||
symbol_count = bfd_canonicalize_symtab (prog_bfd, asymbols);
|
||
if (symbol_count < 0)
|
||
return 0;
|
||
|
||
for (s = 0; s < symbol_count; s++)
|
||
{
|
||
if (!strcmp (asymbols[s]->name, "_fstack"))
|
||
return (asymbols[s]->value + 65536) & ~(0xffffUL);
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/* Create an instance of the simulator. */
|
||
|
||
SIM_DESC
|
||
sim_open (kind, callback, abfd, argv)
|
||
SIM_OPEN_KIND kind;
|
||
host_callback *callback;
|
||
struct bfd *abfd;
|
||
char **argv;
|
||
{
|
||
SIM_DESC sd = sim_state_alloc (kind, callback);
|
||
char c;
|
||
int i;
|
||
unsigned long base, limit;
|
||
|
||
/* The cpu data is kept in a separately allocated chunk of memory. */
|
||
if (sim_cpu_alloc_all (sd, 1, cgen_cpu_max_extra_bytes ()) != SIM_RC_OK)
|
||
{
|
||
free_state (sd);
|
||
return 0;
|
||
}
|
||
|
||
if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
|
||
{
|
||
free_state (sd);
|
||
return 0;
|
||
}
|
||
|
||
/* The parser will print an error message for us, so we silently return. */
|
||
if (sim_parse_args (sd, argv) != SIM_RC_OK)
|
||
{
|
||
free_state (sd);
|
||
return 0;
|
||
}
|
||
|
||
#if 0
|
||
/* Allocate a handler for I/O devices
|
||
if no memory for that range has been allocated by the user.
|
||
All are allocated in one chunk to keep things from being
|
||
unnecessarily complicated. */
|
||
if (sim_core_read_buffer (sd, NULL, read_map, &c, LM32_DEVICE_ADDR, 1) == 0)
|
||
sim_core_attach (sd, NULL, 0 /*level */ ,
|
||
access_read_write, 0 /*space ??? */ ,
|
||
LM32_DEVICE_ADDR, LM32_DEVICE_LEN /*nr_bytes */ ,
|
||
0 /*modulo */ ,
|
||
&lm32_devices, NULL /*buffer */ );
|
||
#endif
|
||
|
||
/* check for/establish the reference program image. */
|
||
if (sim_analyze_program (sd,
|
||
(STATE_PROG_ARGV (sd) != NULL
|
||
? *STATE_PROG_ARGV (sd)
|
||
: NULL), abfd) != SIM_RC_OK)
|
||
{
|
||
free_state (sd);
|
||
return 0;
|
||
}
|
||
|
||
/* Check to see if memory exists at programs start address. */
|
||
if (sim_core_read_buffer (sd, NULL, read_map, &c, STATE_START_ADDR (sd), 1)
|
||
== 0)
|
||
{
|
||
if (STATE_PROG_BFD (sd) != NULL)
|
||
{
|
||
/* It doesn't, so we should try to allocate enough memory to hold program. */
|
||
base = find_base (STATE_PROG_BFD (sd));
|
||
limit = find_limit (STATE_PROG_BFD (sd));
|
||
if (limit == 0)
|
||
{
|
||
sim_io_eprintf (sd,
|
||
"Failed to find symbol _fstack in program. You must specify memory regions with --memory-region.\n");
|
||
free_state (sd);
|
||
return 0;
|
||
}
|
||
/*sim_io_printf (sd, "Allocating memory at 0x%x size 0x%x\n", base, limit); */
|
||
sim_do_commandf (sd, "memory region 0x%x,0x%x", base, limit);
|
||
}
|
||
}
|
||
|
||
/* Establish any remaining configuration options. */
|
||
if (sim_config (sd) != SIM_RC_OK)
|
||
{
|
||
free_state (sd);
|
||
return 0;
|
||
}
|
||
|
||
if (sim_post_argv_init (sd) != SIM_RC_OK)
|
||
{
|
||
free_state (sd);
|
||
return 0;
|
||
}
|
||
|
||
/* Open a copy of the cpu descriptor table. */
|
||
{
|
||
CGEN_CPU_DESC cd =
|
||
lm32_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
|
||
CGEN_ENDIAN_BIG);
|
||
for (i = 0; i < MAX_NR_PROCESSORS; ++i)
|
||
{
|
||
SIM_CPU *cpu = STATE_CPU (sd, i);
|
||
CPU_CPU_DESC (cpu) = cd;
|
||
CPU_DISASSEMBLER (cpu) = sim_cgen_disassemble_insn;
|
||
}
|
||
lm32_cgen_init_dis (cd);
|
||
}
|
||
|
||
/* Initialize various cgen things not done by common framework.
|
||
Must be done after lm32_cgen_cpu_open. */
|
||
cgen_init (sd);
|
||
|
||
return sd;
|
||
}
|
||
|
||
SIM_RC
|
||
sim_create_inferior (sd, abfd, argv, envp)
|
||
SIM_DESC sd;
|
||
struct bfd *abfd;
|
||
char **argv;
|
||
char **envp;
|
||
{
|
||
SIM_CPU *current_cpu = STATE_CPU (sd, 0);
|
||
SIM_ADDR addr;
|
||
|
||
if (abfd != NULL)
|
||
addr = bfd_get_start_address (abfd);
|
||
else
|
||
addr = 0;
|
||
sim_pc_set (current_cpu, addr);
|
||
|
||
/* Standalone mode (i.e. `run`) will take care of the argv for us in
|
||
sim_open() -> sim_parse_args(). But in debug mode (i.e. 'target sim'
|
||
with `gdb`), we need to handle it because the user can change the
|
||
argv on the fly via gdb's 'run'. */
|
||
if (STATE_PROG_ARGV (sd) != argv)
|
||
{
|
||
freeargv (STATE_PROG_ARGV (sd));
|
||
STATE_PROG_ARGV (sd) = dupargv (argv);
|
||
}
|
||
|
||
return SIM_RC_OK;
|
||
}
|