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f9a4d54332
The m4 macro has 2 args: the "wire" settings (which represents the hardwired port behavior), and the default settings (which are used if nothing else is specified). If none are specified, the arch is expected to support both, and the value will be probed based on the user runtime options or the input program. Only two arches today set the default value (bpf & mips). We can probably let this go as it only shows up in one scenario: the sim is invoked, but with no inputs, and no user endian selection. This means bpf will not behave like the other arches: an error is shown and forces the user to make a choice. If an input program is used though, we'll still switch the default to that. This allows us to remove the WITH_DEFAULT_TARGET_BYTE_ORDER setting. For the ports that set a "wire" endian, move it to the runtime init of the respective sim_open calls. This allows us to change the WITH_TARGET_BYTE_ORDER to purely a user-selected configure setting if they want to force a specific endianness. With all the endian logic moved to runtime selection, we can move the configure call up to the common dir so we only process it once across all ports. The ppc arch was picking the wire endian based on the target used, but since we weren't doing that for other biendian arches, we can let this go too. We'll rely on the input selecting the endian, or make the user decide.
202 lines
5.2 KiB
C
202 lines
5.2 KiB
C
/* Main simulator entry points specific to the FRV.
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Copyright (C) 1998-2021 Free Software Foundation, Inc.
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Contributed by Red Hat.
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This file is part of the GNU simulators.
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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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/* This must come before any other includes. */
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#include "defs.h"
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#define WANT_CPU
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#define WANT_CPU_FRVBF
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#include "sim-main.h"
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#include <stdlib.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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#include "elf-bfd.h"
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static void free_state (SIM_DESC);
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static void print_frv_misc_cpu (SIM_CPU *cpu, int verbose);
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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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/* Create an instance of the simulator. */
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SIM_DESC
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sim_open (SIM_OPEN_KIND kind, host_callback *callback, bfd *abfd,
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char * const *argv)
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{
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char c;
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int i;
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unsigned long elf_flags = 0;
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SIM_DESC sd = sim_state_alloc (kind, callback);
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/* Set default options before parsing user options. */
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current_alignment = STRICT_ALIGNMENT;
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current_target_byte_order = BFD_ENDIAN_BIG;
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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) != 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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/* These options override any module options.
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Obviously ambiguity should be avoided, however the caller may wish to
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augment the meaning of an option. */
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sim_add_option_table (sd, NULL, frv_options);
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/* The parser will print an error message for us, so we silently return. */
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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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/* Allocate core managed memory if none specified by user.
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Use address 4 here in case the user wanted address 0 unmapped. */
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if (sim_core_read_buffer (sd, NULL, read_map, &c, 4, 1) == 0)
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sim_do_commandf (sd, "memory region 0,0x%lx", FRV_DEFAULT_MEM_SIZE);
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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),
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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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/* set machine and architecture correctly instead of defaulting to frv */
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{
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bfd *prog_bfd = STATE_PROG_BFD (sd);
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if (prog_bfd != NULL)
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{
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struct elf_backend_data *backend_data;
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if (bfd_get_arch (prog_bfd) != bfd_arch_frv)
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{
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sim_io_eprintf (sd, "%s: \"%s\" is not a FRV object file\n",
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STATE_MY_NAME (sd),
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bfd_get_filename (prog_bfd));
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free_state (sd);
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return 0;
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}
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backend_data = get_elf_backend_data (prog_bfd);
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if (backend_data != NULL)
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backend_data->elf_backend_object_p (prog_bfd);
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elf_flags = elf_elfheader (prog_bfd)->e_flags;
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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 = frv_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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CPU_ELF_FLAGS (cpu) = elf_flags;
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}
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frv_cgen_init_dis (cd);
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}
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/* CPU specific initialization. */
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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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frv_initialize (cpu, sd);
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}
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return sd;
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}
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void
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frv_sim_close (SIM_DESC sd, int quitting)
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{
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int i;
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/* Terminate cache support. */
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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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frv_cache_term (CPU_INSN_CACHE (cpu));
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frv_cache_term (CPU_DATA_CACHE (cpu));
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}
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}
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SIM_RC
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sim_create_inferior (SIM_DESC sd, bfd *abfd, char * const *argv,
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char * const *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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/* Standalone mode (i.e. `run`) will take care of the argv for us in
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sim_open() -> sim_parse_args(). But in debug mode (i.e. 'target sim'
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with `gdb`), we need to handle it because the user can change the
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argv on the fly via gdb's 'run'. */
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if (STATE_PROG_ARGV (sd) != argv)
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{
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freeargv (STATE_PROG_ARGV (sd));
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STATE_PROG_ARGV (sd) = dupargv (argv);
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}
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return SIM_RC_OK;
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}
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