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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.
352 lines
9.6 KiB
C
352 lines
9.6 KiB
C
/* The common simulator framework for GDB, the GNU Debugger.
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Copyright 2002-2021 Free Software Foundation, Inc.
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Contributed by Andrew Cagney and Red Hat.
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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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/* This must come before any other includes. */
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#include "defs.h"
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#include "sim-main.h"
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#include "sim-assert.h"
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#include "bfd.h"
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enum bfd_endian current_target_byte_order = BFD_ENDIAN_UNKNOWN;
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int current_stdio;
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enum sim_alignments current_alignment;
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#if defined (WITH_FLOATING_POINT)
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int current_floating_point;
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#endif
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/* map a byte order onto a textual string */
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static const char *
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config_byte_order_to_a (enum bfd_endian byte_order)
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{
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switch (byte_order)
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{
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case BFD_ENDIAN_LITTLE:
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return "LITTLE_ENDIAN";
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case BFD_ENDIAN_BIG:
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return "BIG_ENDIAN";
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case BFD_ENDIAN_UNKNOWN:
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return "UNKNOWN_ENDIAN";
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}
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return "UNKNOWN";
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}
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static const char *
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config_stdio_to_a (int stdio)
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{
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switch (stdio)
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{
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case DONT_USE_STDIO:
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return "DONT_USE_STDIO";
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case DO_USE_STDIO:
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return "DO_USE_STDIO";
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case 0:
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return "0";
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}
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return "UNKNOWN";
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}
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static const char *
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config_environment_to_a (enum sim_environment environment)
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{
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switch (environment)
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{
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case ALL_ENVIRONMENT:
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return "ALL_ENVIRONMENT";
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case USER_ENVIRONMENT:
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return "USER_ENVIRONMENT";
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case VIRTUAL_ENVIRONMENT:
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return "VIRTUAL_ENVIRONMENT";
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case OPERATING_ENVIRONMENT:
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return "OPERATING_ENVIRONMENT";
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}
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return "UNKNOWN";
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}
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static const char *
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config_alignment_to_a (enum sim_alignments alignment)
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{
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switch (alignment)
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{
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case MIXED_ALIGNMENT:
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return "MIXED_ALIGNMENT";
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case NONSTRICT_ALIGNMENT:
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return "NONSTRICT_ALIGNMENT";
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case STRICT_ALIGNMENT:
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return "STRICT_ALIGNMENT";
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case FORCED_ALIGNMENT:
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return "FORCED_ALIGNMENT";
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}
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return "UNKNOWN";
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}
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#if defined (WITH_FLOATING_POINT)
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static const char *
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config_floating_point_to_a (int floating_point)
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{
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switch (floating_point)
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{
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case SOFT_FLOATING_POINT:
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return "SOFT_FLOATING_POINT";
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case HARD_FLOATING_POINT:
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return "HARD_FLOATING_POINT";
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case 0:
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return "0";
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}
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return "UNKNOWN";
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}
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#endif
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/* Set the default environment, prior to parsing argv. */
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void
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sim_config_default (SIM_DESC sd)
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{
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/* Set the current environment to ALL_ENVIRONMENT to indicate none has been
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selected yet. This is so that after parsing argv, we know whether the
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environment was explicitly specified or not. */
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STATE_ENVIRONMENT (sd) = ALL_ENVIRONMENT;
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}
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/* Complete and verify the simulation environment. */
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SIM_RC
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sim_config (SIM_DESC sd)
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{
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enum bfd_endian prefered_target_byte_order;
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SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
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/* extract all relevant information */
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if (STATE_PROG_BFD (sd) == NULL
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/* If we have a binary input file (presumably with specified
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"--architecture"), it'll have no endianness. */
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|| (!bfd_little_endian (STATE_PROG_BFD (sd))
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&& !bfd_big_endian (STATE_PROG_BFD (sd))))
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prefered_target_byte_order = BFD_ENDIAN_UNKNOWN;
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else
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prefered_target_byte_order = (bfd_little_endian (STATE_PROG_BFD (sd))
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? BFD_ENDIAN_LITTLE
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: BFD_ENDIAN_BIG);
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/* set the target byte order */
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#if (WITH_TREE_PROPERTIES)
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if (current_target_byte_order == BFD_ENDIAN_UNKNOWN)
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current_target_byte_order
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= (tree_find_boolean_property (root, "/options/little-endian?")
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? BFD_ENDIAN_LITTLE
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: BFD_ENDIAN_BIG);
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#endif
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if (current_target_byte_order == BFD_ENDIAN_UNKNOWN
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&& prefered_target_byte_order != BFD_ENDIAN_UNKNOWN)
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current_target_byte_order = prefered_target_byte_order;
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if (current_target_byte_order == BFD_ENDIAN_UNKNOWN)
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current_target_byte_order = WITH_TARGET_BYTE_ORDER;
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/* verify the target byte order */
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if (CURRENT_TARGET_BYTE_ORDER == BFD_ENDIAN_UNKNOWN)
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{
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sim_io_eprintf (sd, "Target byte order unspecified\n");
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return SIM_RC_FAIL;
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}
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if (CURRENT_TARGET_BYTE_ORDER != current_target_byte_order)
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sim_io_eprintf (sd, "Target (%s) and configured (%s) byte order in conflict\n",
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config_byte_order_to_a (current_target_byte_order),
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config_byte_order_to_a (CURRENT_TARGET_BYTE_ORDER));
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if (prefered_target_byte_order != BFD_ENDIAN_UNKNOWN
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&& CURRENT_TARGET_BYTE_ORDER != prefered_target_byte_order)
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sim_io_eprintf (sd, "Target (%s) and specified (%s) byte order in conflict\n",
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config_byte_order_to_a (CURRENT_TARGET_BYTE_ORDER),
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config_byte_order_to_a (prefered_target_byte_order));
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/* set the stdio */
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if (current_stdio == 0)
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current_stdio = WITH_STDIO;
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if (current_stdio == 0)
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current_stdio = DO_USE_STDIO;
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/* verify the stdio */
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if (CURRENT_STDIO == 0)
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{
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sim_io_eprintf (sd, "Target standard IO unspecified\n");
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return SIM_RC_FAIL;
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}
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if (CURRENT_STDIO != current_stdio)
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{
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sim_io_eprintf (sd, "Target (%s) and configured (%s) standard IO in conflict\n",
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config_stdio_to_a (CURRENT_STDIO),
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config_stdio_to_a (current_stdio));
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return SIM_RC_FAIL;
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}
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/* check the value of MSB */
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if (WITH_TARGET_WORD_MSB != 0
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&& WITH_TARGET_WORD_MSB != (WITH_TARGET_WORD_BITSIZE - 1))
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{
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sim_io_eprintf (sd, "Target bitsize (%d) contradicts target most significant bit (%d)\n",
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WITH_TARGET_WORD_BITSIZE, WITH_TARGET_WORD_MSB);
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return SIM_RC_FAIL;
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}
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/* set the environment */
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#if (WITH_TREE_PROPERTIES)
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if (STATE_ENVIRONMENT (sd) == ALL_ENVIRONMENT)
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{
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const char *env =
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tree_find_string_property (root, "/openprom/options/env");
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STATE_ENVIRONMENT (sd) = ((strcmp (env, "user") == 0
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|| strcmp (env, "uea") == 0)
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? USER_ENVIRONMENT
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: (strcmp (env, "virtual") == 0
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|| strcmp (env, "vea") == 0)
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? VIRTUAL_ENVIRONMENT
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: (strcmp (env, "operating") == 0
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|| strcmp (env, "oea") == 0)
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? OPERATING_ENVIRONMENT
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: ALL_ENVIRONMENT);
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}
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#endif
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if (STATE_ENVIRONMENT (sd) == ALL_ENVIRONMENT)
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STATE_ENVIRONMENT (sd) = (WITH_ENVIRONMENT != ALL_ENVIRONMENT ?
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WITH_ENVIRONMENT : USER_ENVIRONMENT);
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/* set the alignment */
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#if (WITH_TREE_PROPERTIES)
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if (current_alignment == 0)
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current_alignment =
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(tree_find_boolean_property (root, "/openprom/options/strict-alignment?")
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? STRICT_ALIGNMENT
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: NONSTRICT_ALIGNMENT);
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#endif
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if (current_alignment == 0)
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current_alignment = WITH_ALIGNMENT;
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/* If the port hasn't specified an alignment, default to not enforcing. */
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if (current_alignment == 0)
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current_alignment = NONSTRICT_ALIGNMENT;
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/* verify the alignment */
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if (CURRENT_ALIGNMENT == 0)
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{
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sim_io_eprintf (sd, "Target alignment unspecified\n");
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return SIM_RC_FAIL;
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}
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if (CURRENT_ALIGNMENT != current_alignment)
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{
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sim_io_eprintf (sd, "Target (%s) and configured (%s) alignment in conflict\n",
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config_alignment_to_a (CURRENT_ALIGNMENT),
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config_alignment_to_a (current_alignment));
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return SIM_RC_FAIL;
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}
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#if defined (WITH_FLOATING_POINT)
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/* set the floating point */
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if (current_floating_point == 0)
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current_floating_point = WITH_FLOATING_POINT;
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/* verify the floating point */
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if (CURRENT_FLOATING_POINT == 0)
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{
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sim_io_eprintf (sd, "Target floating-point unspecified\n");
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return SIM_RC_FAIL;
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}
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if (CURRENT_FLOATING_POINT != current_floating_point)
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{
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sim_io_eprintf (sd, "Target (%s) and configured (%s) floating-point in conflict\n",
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config_alignment_to_a (CURRENT_FLOATING_POINT),
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config_alignment_to_a (current_floating_point));
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return SIM_RC_FAIL;
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}
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#endif
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return SIM_RC_OK;
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}
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void
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sim_config_print (SIM_DESC sd)
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{
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sim_io_printf (sd, "WITH_TARGET_BYTE_ORDER = %s\n",
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config_byte_order_to_a (WITH_TARGET_BYTE_ORDER));
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sim_io_printf (sd, "HOST_BYTE_ORDER = %s\n",
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config_byte_order_to_a (HOST_BYTE_ORDER));
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sim_io_printf (sd, "WITH_STDIO = %s\n",
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config_stdio_to_a (WITH_STDIO));
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sim_io_printf (sd, "WITH_TARGET_WORD_MSB = %d\n",
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WITH_TARGET_WORD_MSB);
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sim_io_printf (sd, "WITH_TARGET_WORD_BITSIZE = %d\n",
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WITH_TARGET_WORD_BITSIZE);
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sim_io_printf (sd, "WITH_TARGET_ADDRESS_BITSIZE = %d\n",
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WITH_TARGET_ADDRESS_BITSIZE);
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sim_io_printf (sd, "WITH_TARGET_CELL_BITSIZE = %d\n",
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WITH_TARGET_CELL_BITSIZE);
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sim_io_printf (sd, "WITH_TARGET_FLOATING_POINT_BITSIZE = %d\n",
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WITH_TARGET_FLOATING_POINT_BITSIZE);
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sim_io_printf (sd, "WITH_ENVIRONMENT = %s\n",
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config_environment_to_a (WITH_ENVIRONMENT));
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sim_io_printf (sd, "WITH_ALIGNMENT = %s\n",
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config_alignment_to_a (WITH_ALIGNMENT));
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#if defined (WITH_XOR_ENDIAN)
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sim_io_printf (sd, "WITH_XOR_ENDIAN = %d\n", WITH_XOR_ENDIAN);
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#endif
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#if defined (WITH_FLOATING_POINT)
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sim_io_printf (sd, "WITH_FLOATING_POINT = %s\n",
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config_floating_point_to_a (WITH_FLOATING_POINT));
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#endif
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#if defined (WITH_SMP)
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sim_io_printf (sd, "WITH_SMP = %d\n", WITH_SMP);
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#endif
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#if defined (WITH_RESERVED_BITS)
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sim_io_printf (sd, "WITH_RESERVED_BITS = %d\n", WITH_RESERVED_BITS);
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#endif
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#if defined (WITH_PROFILE)
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sim_io_printf (sd, "WITH_PROFILE = %d\n", WITH_PROFILE);
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#endif
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}
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