/* Main simulator entry points specific to Lattice Mico32. Contributed by Jon Beniston Copyright (C) 2009, 2010, 2011 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 . */ #include "sim-main.h" #include "sim-options.h" #include "libiberty.h" #include "bfd.h" #ifdef HAVE_STDLIB_H #include #endif static void free_state (SIM_DESC); static void print_lm32_misc_cpu (SIM_CPU * cpu, int verbose); static DECLARE_OPTION_HANDLER (lm32_option_handler); enum { OPTION_ENDIAN = OPTION_START, }; /* 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. */ static const OPTION lm32_options[] = { {{"endian", required_argument, NULL, OPTION_ENDIAN}, 'E', "big", "Set endianness", lm32_option_handler}, {{NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL} }; /* Records simulator descriptor so utilities like lm32_dump_regs can be called from gdb. */ SIM_DESC current_state; /* 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; } /* Handle lm32 specific options. */ static SIM_RC lm32_option_handler (sd, cpu, opt, arg, is_command) SIM_DESC sd; sim_cpu *cpu; int opt; char *arg; int is_command; { return SIM_RC_OK; } /* 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; } sim_add_option_table (sd, NULL, lm32_options); /* getopt will print the error message so we just have to exit if this fails. FIXME: Hmmm... in the case of gdb we need getopt to call print_filtered. */ 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); /* Store in a global so things like lm32_dump_regs can be invoked from the gdb command line. */ current_state = sd; return sd; } void sim_close (sd, quitting) SIM_DESC sd; int quitting; { lm32_cgen_cpu_close (CPU_CPU_DESC (STATE_CPU (sd, 0))); sim_module_uninstall (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); #if 0 STATE_ARGV (sd) = sim_copy_argv (argv); STATE_ENVP (sd) = sim_copy_argv (envp); #endif return SIM_RC_OK; } void sim_do_command (sd, cmd) SIM_DESC sd; char *cmd; { if (sim_args_command (sd, cmd) != SIM_RC_OK) sim_io_eprintf (sd, "Unknown command `%s'\n", cmd); }