6e4f085c7f
Other than the nice advantage of all sims having to declare one fewer common function, this also fixes leakage in pretty much every sim. Many were not freeing any resources, and a few were inconsistent as to the ones they did. Now we have a single module that takes care of all the logic for us. Most of the non-cgen based ones could be deleted outright. The cgen ones required adding a callback to the arch-specific cleanup func. The few that still have close callbacks are to manage their internal state. We do not convert erc32, m32c, ppc, rl78, or rx as they do not use the common sim core.
272 lines
7 KiB
C
272 lines
7 KiB
C
/* Main simulator entry points specific to Lattice Mico32.
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Contributed by Jon Beniston <jon@beniston.com>
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Copyright (C) 2009-2015 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "sim-main.h"
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#include "sim-options.h"
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#include "libiberty.h"
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#include "bfd.h"
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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static void free_state (SIM_DESC);
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static void print_lm32_misc_cpu (SIM_CPU * cpu, int verbose);
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static DECLARE_OPTION_HANDLER (lm32_option_handler);
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enum
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{
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OPTION_ENDIAN = OPTION_START,
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};
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/* GDB passes -E, even though it's fixed, so we have to handle it here. common code only handles it if SIM_HAVE_BIENDIAN is defined, which it isn't for lm32. */
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static const OPTION lm32_options[] = {
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{{"endian", required_argument, NULL, OPTION_ENDIAN},
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'E', "big", "Set endianness",
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lm32_option_handler},
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{{NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL}
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};
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/* Records simulator descriptor so utilities like lm32_dump_regs can be
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called from gdb. */
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SIM_DESC current_state;
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/* Cover function of sim_state_free to free the cpu buffers as well. */
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static void
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free_state (SIM_DESC sd)
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{
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if (STATE_MODULES (sd) != NULL)
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sim_module_uninstall (sd);
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sim_cpu_free_all (sd);
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sim_state_free (sd);
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}
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/* Find memory range used by program. */
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static unsigned long
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find_base (bfd *prog_bfd)
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{
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int found;
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unsigned long base = ~(0UL);
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asection *s;
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found = 0;
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for (s = prog_bfd->sections; s; s = s->next)
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{
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if ((strcmp (bfd_get_section_name (prog_bfd, s), ".boot") == 0)
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|| (strcmp (bfd_get_section_name (prog_bfd, s), ".text") == 0)
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|| (strcmp (bfd_get_section_name (prog_bfd, s), ".data") == 0)
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|| (strcmp (bfd_get_section_name (prog_bfd, s), ".bss") == 0))
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{
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if (!found)
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{
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base = bfd_get_section_vma (prog_bfd, s);
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found = 1;
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}
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else
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base =
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bfd_get_section_vma (prog_bfd,
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s) < base ? bfd_get_section_vma (prog_bfd,
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s) : base;
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}
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}
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return base & ~(0xffffUL);
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}
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static unsigned long
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find_limit (bfd *prog_bfd)
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{
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struct bfd_symbol **asymbols;
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long symsize;
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long symbol_count;
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long s;
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symsize = bfd_get_symtab_upper_bound (prog_bfd);
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if (symsize < 0)
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return 0;
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asymbols = (asymbol **) xmalloc (symsize);
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symbol_count = bfd_canonicalize_symtab (prog_bfd, asymbols);
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if (symbol_count < 0)
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return 0;
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for (s = 0; s < symbol_count; s++)
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{
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if (!strcmp (asymbols[s]->name, "_fstack"))
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return (asymbols[s]->value + 65536) & ~(0xffffUL);
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}
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return 0;
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}
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/* Handle lm32 specific options. */
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static SIM_RC
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lm32_option_handler (sd, cpu, opt, arg, is_command)
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SIM_DESC sd;
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sim_cpu *cpu;
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int opt;
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char *arg;
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int is_command;
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{
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return SIM_RC_OK;
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}
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/* Create an instance of the simulator. */
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SIM_DESC
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sim_open (kind, callback, abfd, argv)
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SIM_OPEN_KIND kind;
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host_callback *callback;
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struct bfd *abfd;
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char **argv;
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{
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SIM_DESC sd = sim_state_alloc (kind, callback);
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char c;
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int i;
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unsigned long base, limit;
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/* The cpu data is kept in a separately allocated chunk of memory. */
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if (sim_cpu_alloc_all (sd, 1, cgen_cpu_max_extra_bytes ()) != SIM_RC_OK)
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{
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free_state (sd);
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return 0;
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}
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if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
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{
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free_state (sd);
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return 0;
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}
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sim_add_option_table (sd, NULL, lm32_options);
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/* getopt will print the error message so we just have to exit if this fails.
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FIXME: Hmmm... in the case of gdb we need getopt to call
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print_filtered. */
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if (sim_parse_args (sd, argv) != SIM_RC_OK)
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{
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free_state (sd);
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return 0;
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}
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#if 0
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/* Allocate a handler for I/O devices
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if no memory for that range has been allocated by the user.
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All are allocated in one chunk to keep things from being
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unnecessarily complicated. */
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if (sim_core_read_buffer (sd, NULL, read_map, &c, LM32_DEVICE_ADDR, 1) == 0)
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sim_core_attach (sd, NULL, 0 /*level */ ,
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access_read_write, 0 /*space ??? */ ,
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LM32_DEVICE_ADDR, LM32_DEVICE_LEN /*nr_bytes */ ,
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0 /*modulo */ ,
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&lm32_devices, NULL /*buffer */ );
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#endif
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/* check for/establish the reference program image. */
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if (sim_analyze_program (sd,
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(STATE_PROG_ARGV (sd) != NULL
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? *STATE_PROG_ARGV (sd)
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: NULL), abfd) != SIM_RC_OK)
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{
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free_state (sd);
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return 0;
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}
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/* Check to see if memory exists at programs start address. */
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if (sim_core_read_buffer (sd, NULL, read_map, &c, STATE_START_ADDR (sd), 1)
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== 0)
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{
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if (STATE_PROG_BFD (sd) != NULL)
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{
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/* It doesn't, so we should try to allocate enough memory to hold program. */
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base = find_base (STATE_PROG_BFD (sd));
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limit = find_limit (STATE_PROG_BFD (sd));
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if (limit == 0)
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{
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sim_io_eprintf (sd,
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"Failed to find symbol _fstack in program. You must specify memory regions with --memory-region.\n");
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free_state (sd);
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return 0;
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}
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/*sim_io_printf (sd, "Allocating memory at 0x%x size 0x%x\n", base, limit); */
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sim_do_commandf (sd, "memory region 0x%x,0x%x", base, limit);
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}
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}
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/* Establish any remaining configuration options. */
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if (sim_config (sd) != SIM_RC_OK)
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{
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free_state (sd);
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return 0;
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}
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if (sim_post_argv_init (sd) != SIM_RC_OK)
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{
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free_state (sd);
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return 0;
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}
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/* Open a copy of the cpu descriptor table. */
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{
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CGEN_CPU_DESC cd =
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lm32_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
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CGEN_ENDIAN_BIG);
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for (i = 0; i < MAX_NR_PROCESSORS; ++i)
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{
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SIM_CPU *cpu = STATE_CPU (sd, i);
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CPU_CPU_DESC (cpu) = cd;
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CPU_DISASSEMBLER (cpu) = sim_cgen_disassemble_insn;
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}
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lm32_cgen_init_dis (cd);
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}
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/* Initialize various cgen things not done by common framework.
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Must be done after lm32_cgen_cpu_open. */
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cgen_init (sd);
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/* Store in a global so things like lm32_dump_regs can be invoked
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from the gdb command line. */
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current_state = sd;
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return sd;
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}
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SIM_RC
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sim_create_inferior (sd, abfd, argv, envp)
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SIM_DESC sd;
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struct bfd *abfd;
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char **argv;
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char **envp;
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{
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SIM_CPU *current_cpu = STATE_CPU (sd, 0);
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SIM_ADDR addr;
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if (abfd != NULL)
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addr = bfd_get_start_address (abfd);
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else
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addr = 0;
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sim_pc_set (current_cpu, addr);
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#if 0
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STATE_ARGV (sd) = sim_copy_argv (argv);
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STATE_ENVP (sd) = sim_copy_argv (envp);
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#endif
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return SIM_RC_OK;
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}
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