| /* Main simulator entry points for the i960. |
| Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc. |
| Contributed by Cygnus Support. |
| |
| 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 2, 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, write to the Free Software Foundation, Inc., |
| 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| #include "libiberty.h" |
| #include "bfd.h" |
| #include "sim-main.h" |
| #ifdef HAVE_STDLIB_H |
| #include <stdlib.h> |
| #endif |
| #include "sim-options.h" |
| #include "dis-asm.h" |
| |
| static void free_state (SIM_DESC); |
| |
| /* Since we don't build the cgen-opcode table, we use the old |
| disassembler. */ |
| static CGEN_DISASSEMBLER i960_disassemble_insn; |
| |
| /* Records simulator descriptor so utilities like i960_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); |
| } |
| |
| /* 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; |
| { |
| char c; |
| int i; |
| SIM_DESC sd = sim_state_alloc (kind, callback); |
| |
| /* 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 0 /* FIXME: pc is in mach-specific struct */ |
| /* FIXME: watchpoints code shouldn't need this */ |
| { |
| SIM_CPU *current_cpu = STATE_CPU (sd, 0); |
| STATE_WATCHPOINTS (sd)->pc = &(PC); |
| STATE_WATCHPOINTS (sd)->sizeof_pc = sizeof (PC); |
| } |
| #endif |
| |
| if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK) |
| { |
| free_state (sd); |
| return 0; |
| } |
| |
| #if 0 /* FIXME: 'twould be nice if we could do this */ |
| /* These options override any module options. |
| Obviously ambiguity should be avoided, however the caller may wish to |
| augment the meaning of an option. */ |
| if (extra_options != NULL) |
| sim_add_option_table (sd, extra_options); |
| #endif |
| |
| /* 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; |
| } |
| |
| /* Allocate a handler for the control registers and other 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, I960_DEVICE_ADDR, 1) == 0) |
| sim_core_attach (sd, NULL, |
| 0 /*level*/, |
| access_read_write, |
| 0 /*space ???*/, |
| I960_DEVICE_ADDR, I960_DEVICE_LEN /*nr_bytes*/, |
| 0 /*modulo*/, |
| &i960_devices, |
| NULL /*buffer*/); |
| |
| /* Allocate core managed memory if none specified by user. |
| Use address 4 here in case the user wanted address 0 unmapped. */ |
| if (sim_core_read_buffer (sd, NULL, read_map, &c, 4, 1) == 0) |
| /* ??? wilson */ |
| sim_do_commandf (sd, "memory region 0x%lx,0x%lx", I960_DEFAULT_MEM_START, |
| I960_DEFAULT_MEM_SIZE); |
| |
| /* 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; |
| } |
| |
| /* 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 = i960_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name, |
| CGEN_ENDIAN_LITTLE); |
| for (i = 0; i < MAX_NR_PROCESSORS; ++i) |
| { |
| SIM_CPU *cpu = STATE_CPU (sd, i); |
| CPU_CPU_DESC (cpu) = cd; |
| CPU_DISASSEMBLER (cpu) = i960_disassemble_insn; |
| } |
| } |
| |
| /* Initialize various cgen things not done by common framework. |
| Must be done after i960_cgen_cpu_open. */ |
| cgen_init (sd); |
| |
| /* Store in a global so things like i960_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; |
| { |
| i960_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; |
| } |
| |
| #if 0 |
| int |
| sim_stop (SIM_DESC sd) |
| { |
| switch (STATE_ARCHITECTURE (sd)->mach) |
| { |
| case bfd_mach_i960_ka_sa : |
| return i960base_engine_stop (sd, NULL, NULL_CIA, sim_stopped, SIM_SIGINT); |
| default : |
| abort (); |
| } |
| } |
| |
| /* This isn't part of the official interface. |
| This is just a good place to put this for now. */ |
| |
| void |
| sim_sync_stop (SIM_DESC sd, SIM_CPU *cpu, PCADDR pc, enum sim_stop reason, int sigrc) |
| { |
| switch (STATE_ARCHITECTURE (sd)->mach) |
| { |
| case bfd_mach_i960_ka_sa : |
| (void) i960base_engine_stop (sd, cpu, pc, reason, sigrc); |
| break; |
| default : |
| abort (); |
| } |
| } |
| |
| void |
| sim_resume (sd, step, siggnal) |
| SIM_DESC sd; |
| int step, siggnal; |
| { |
| sim_module_resume (sd); |
| |
| switch (STATE_ARCHITECTURE (sd)->mach) |
| { |
| case bfd_mach_i960_ka_sa : |
| i960base_engine_run (sd, step, siggnal); |
| break; |
| default : |
| abort (); |
| } |
| |
| sim_module_suspend (sd); |
| } |
| #endif |
| |
| /* The contents of BUF are in target byte order. */ |
| |
| int |
| sim_fetch_register (sd, rn, buf, length) |
| SIM_DESC sd; |
| int rn; |
| unsigned char *buf; |
| int length; |
| { |
| SIM_CPU *cpu = STATE_CPU (sd, 0); |
| |
| return (* CPU_REG_FETCH (cpu)) (cpu, rn, buf, length); |
| } |
| |
| /* The contents of BUF are in target byte order. */ |
| |
| int |
| sim_store_register (sd, rn, buf, length) |
| SIM_DESC sd; |
| int rn; |
| unsigned char *buf; |
| int length; |
| { |
| SIM_CPU *cpu = STATE_CPU (sd, 0); |
| |
| return (* CPU_REG_STORE (cpu)) (cpu, rn, buf, length); |
| } |
| |
| 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); |
| } |
| |
| /* Disassemble an instruction. */ |
| |
| static void |
| i960_disassemble_insn (SIM_CPU *cpu, const CGEN_INSN *insn, |
| const ARGBUF *abuf, IADDR pc, char *buf) |
| { |
| struct disassemble_info disasm_info; |
| SFILE sfile; |
| SIM_DESC sd = CPU_STATE (cpu); |
| int insn_length = CGEN_INSN_BITSIZE (insn) / 8; |
| |
| sfile.buffer = sfile.current = buf; |
| INIT_DISASSEMBLE_INFO (disasm_info, (FILE *) &sfile, |
| (fprintf_ftype) sim_disasm_sprintf); |
| disasm_info.endian = |
| (bfd_big_endian (STATE_PROG_BFD (sd)) ? BFD_ENDIAN_BIG |
| : bfd_little_endian (STATE_PROG_BFD (sd)) ? BFD_ENDIAN_LITTLE |
| : BFD_ENDIAN_UNKNOWN); |
| disasm_info.read_memory_func = sim_disasm_read_memory; |
| disasm_info.memory_error_func = sim_disasm_perror_memory; |
| disasm_info.application_data = (PTR) cpu; |
| |
| print_insn_i960 (pc, &disasm_info); |
| } |