mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-15 04:31:49 +08:00
1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
1031 lines
29 KiB
C
1031 lines
29 KiB
C
/* Main simulator entry points specific to the CRIS.
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Copyright (C) 2004-2024 Free Software Foundation, Inc.
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Contributed by Axis Communications.
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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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/* Based on the fr30 file, mixing in bits from the i960 and pruning of
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dead code. */
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/* This must come before any other includes. */
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#include "defs.h"
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#include "libiberty.h"
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#include "bfd.h"
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#include "bfd/elf-bfd.h"
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#include "sim/callback.h"
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#include "sim-main.h"
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#include "sim-options.h"
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#include "sim-hw.h"
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#include "dis-asm.h"
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#include "environ.h"
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/* Used with get_progbounds to find out how much memory is needed for the
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program. We don't want to allocate more, since that could mask
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invalid memory accesses program bugs. */
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struct progbounds {
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USI startmem;
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USI endmem;
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USI end_loadmem;
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USI start_nonloadmem;
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};
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static void free_state (SIM_DESC);
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static void get_progbounds_iterator (bfd *, asection *, void *);
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static SIM_RC cris_option_handler (SIM_DESC, sim_cpu *, int, char *, int);
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/* Since we don't build the cgen-opcode table, we use the old
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disassembler. */
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static CGEN_DISASSEMBLER cris_disassemble_insn;
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/* By default, we set up stack and environment variables like the Linux
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kernel. */
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static char cris_bare_iron = 0;
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/* Whether 0x9000000xx have simulator-specific meanings. */
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char cris_have_900000xxif = 0;
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/* Used to optionally override the default start address of the
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simulation. */
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static USI cris_start_address = 0xffffffffu;
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/* Used to optionally add offsets to the loaded image and its start
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address. (Not used for the interpreter of dynamically loaded
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programs or the DSO:s.) */
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static int cris_program_offset = 0;
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/* What to do when we face a more or less unknown syscall. */
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enum cris_unknown_syscall_action_type cris_unknown_syscall_action
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= CRIS_USYSC_MSG_STOP;
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/* CRIS-specific options. */
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typedef enum {
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OPTION_CRIS_STATS = OPTION_START,
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OPTION_CRIS_TRACE,
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OPTION_CRIS_NAKED,
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OPTION_CRIS_PROGRAM_OFFSET,
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OPTION_CRIS_STARTADDR,
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OPTION_CRIS_900000XXIF,
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OPTION_CRIS_UNKNOWN_SYSCALL
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} CRIS_OPTIONS;
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static const OPTION cris_options[] =
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{
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{ {"cris-cycles", required_argument, NULL, OPTION_CRIS_STATS},
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'\0', "basic|unaligned|schedulable|all",
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"Dump execution statistics",
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cris_option_handler, NULL },
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{ {"cris-trace", required_argument, NULL, OPTION_CRIS_TRACE},
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'\0', "basic",
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"Emit trace information while running",
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cris_option_handler, NULL },
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{ {"cris-naked", no_argument, NULL, OPTION_CRIS_NAKED},
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'\0', NULL, "Don't set up stack and environment",
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cris_option_handler, NULL },
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#if WITH_HW
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{ {"cris-900000xx", no_argument, NULL, OPTION_CRIS_900000XXIF},
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'\0', NULL, "Define addresses at 0x900000xx with simulator semantics",
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cris_option_handler, NULL },
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#endif
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{ {"cris-unknown-syscall", required_argument, NULL,
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OPTION_CRIS_UNKNOWN_SYSCALL},
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'\0', "stop|enosys|enosys-quiet", "Action at an unknown system call",
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cris_option_handler, NULL },
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{ {"cris-program-offset", required_argument, NULL,
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OPTION_CRIS_PROGRAM_OFFSET},
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'\0', "OFFSET",
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"Offset image addresses and default start address of a program",
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cris_option_handler },
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{ {"cris-start-address", required_argument, NULL, OPTION_CRIS_STARTADDR},
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'\0', "ADDRESS", "Set start address",
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cris_option_handler },
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{ {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL, NULL }
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};
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/* Handle CRIS-specific options. */
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static SIM_RC
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cris_option_handler (SIM_DESC sd, sim_cpu *cpu ATTRIBUTE_UNUSED, int opt,
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char *arg, int is_command ATTRIBUTE_UNUSED)
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{
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/* The options are CRIS-specific, but cpu-specific option-handling is
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broken; required to being with "--cpu0-". We store the flags in an
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unused field in the global state structure and move the flags over
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to the module-specific CPU data when we store things in the
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cpu-specific structure. */
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char *tracefp = STATE_TRACE_FLAGS (sd);
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char *chp = arg;
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switch ((CRIS_OPTIONS) opt)
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{
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case OPTION_CRIS_STATS:
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if (strcmp (arg, "basic") == 0)
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*tracefp = FLAG_CRIS_MISC_PROFILE_SIMPLE;
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else if (strcmp (arg, "unaligned") == 0)
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*tracefp
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= (FLAG_CRIS_MISC_PROFILE_UNALIGNED
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| FLAG_CRIS_MISC_PROFILE_SIMPLE);
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else if (strcmp (arg, "schedulable") == 0)
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*tracefp
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= (FLAG_CRIS_MISC_PROFILE_SCHEDULABLE
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| FLAG_CRIS_MISC_PROFILE_SIMPLE);
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else if (strcmp (arg, "all") == 0)
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*tracefp = FLAG_CRIS_MISC_PROFILE_ALL;
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else
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{
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/* Beware; the framework does not handle the error case;
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we have to do it ourselves. */
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sim_io_eprintf (sd, "Unknown option `--cris-cycles=%s'\n", arg);
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return SIM_RC_FAIL;
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}
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break;
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case OPTION_CRIS_TRACE:
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if (strcmp (arg, "basic") == 0)
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*tracefp |= FLAG_CRIS_MISC_PROFILE_XSIM_TRACE;
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else
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{
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sim_io_eprintf (sd, "Unknown option `--cris-trace=%s'\n", arg);
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return SIM_RC_FAIL;
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}
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break;
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case OPTION_CRIS_NAKED:
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cris_bare_iron = 1;
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break;
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case OPTION_CRIS_900000XXIF:
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cris_have_900000xxif = 1;
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break;
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case OPTION_CRIS_STARTADDR:
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errno = 0;
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cris_start_address = (USI) strtoul (chp, &chp, 0);
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if (errno != 0 || *chp != 0)
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{
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sim_io_eprintf (sd, "Invalid option `--cris-start-address=%s'\n",
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arg);
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return SIM_RC_FAIL;
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}
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break;
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case OPTION_CRIS_PROGRAM_OFFSET:
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errno = 0;
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cris_program_offset = (int) strtol (chp, &chp, 0);
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if (errno != 0 || *chp != 0)
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{
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sim_io_eprintf (sd, "Invalid option `--cris-program-offset=%s'\n",
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arg);
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return SIM_RC_FAIL;
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}
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break;
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case OPTION_CRIS_UNKNOWN_SYSCALL:
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if (strcmp (arg, "enosys") == 0)
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cris_unknown_syscall_action = CRIS_USYSC_MSG_ENOSYS;
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else if (strcmp (arg, "enosys-quiet") == 0)
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cris_unknown_syscall_action = CRIS_USYSC_QUIET_ENOSYS;
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else if (strcmp (arg, "stop") == 0)
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cris_unknown_syscall_action = CRIS_USYSC_MSG_STOP;
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else
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{
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sim_io_eprintf (sd, "Unknown option `--cris-unknown-syscall=%s'\n",
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arg);
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return SIM_RC_FAIL;
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}
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break;
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default:
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/* We'll actually never get here; the caller handles the error
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case. */
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sim_io_eprintf (sd, "Unknown option `%s'\n", arg);
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return SIM_RC_FAIL;
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}
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/* Imply --profile-model=on. */
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return sim_profile_set_option (sd, "-model", PROFILE_MODEL_IDX, "on");
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}
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/* An ELF-specific simplified ../common/sim-load.c:sim_load_file,
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using the program headers, not sections, in order to make sure that
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the program headers themeselves are also loaded. The caller is
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responsible for asserting that ABFD is an ELF file. */
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static bfd_boolean
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cris_load_elf_file (SIM_DESC sd, struct bfd *abfd, sim_write_fn do_write)
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{
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Elf_Internal_Phdr *phdr;
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int n_hdrs;
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int i;
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bfd_boolean verbose = STATE_OPEN_KIND (sd) == SIM_OPEN_DEBUG;
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phdr = elf_tdata (abfd)->phdr;
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n_hdrs = elf_elfheader (abfd)->e_phnum;
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/* We're only interested in PT_LOAD; all necessary information
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should be covered by that. */
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for (i = 0; i < n_hdrs; i++)
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{
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bfd_byte *buf;
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bfd_vma lma = STATE_LOAD_AT_LMA_P (sd)
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? phdr[i].p_paddr : phdr[i].p_vaddr;
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if (phdr[i].p_type != PT_LOAD)
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continue;
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buf = xmalloc (phdr[i].p_filesz);
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if (verbose)
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sim_io_printf (sd,
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"Loading segment at 0x%" PRIx64 ", "
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"size 0x%" PRIx64 "\n",
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(uint64_t) lma, (uint64_t) phdr[i].p_filesz);
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if (bfd_seek (abfd, phdr[i].p_offset, SEEK_SET) != 0
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|| (bfd_read (buf, phdr[i].p_filesz, abfd) != phdr[i].p_filesz))
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{
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sim_io_eprintf (sd,
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"%s: could not read segment at 0x%" PRIx64 ", "
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"size 0x%" PRIx64 "\n",
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STATE_MY_NAME (sd), (uint64_t) lma,
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(uint64_t) phdr[i].p_filesz);
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free (buf);
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return FALSE;
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}
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if (do_write (sd, lma, buf, phdr[i].p_filesz) != phdr[i].p_filesz)
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{
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sim_io_eprintf (sd,
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"%s: could not load segment at 0x%" PRIx64 ", "
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"size 0x%" PRIx64 "\n",
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STATE_MY_NAME (sd), (uint64_t) lma,
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(uint64_t) phdr[i].p_filesz);
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free (buf);
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return FALSE;
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}
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free (buf);
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}
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return TRUE;
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}
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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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/* Helper struct for cris_set_section_offset_iterator. */
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struct offsetinfo
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{
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SIM_DESC sd;
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int offset;
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};
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/* BFD section iterator to offset the LMA and VMA. */
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static void
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cris_set_section_offset_iterator (bfd *abfd, asection *s, void *vp)
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{
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struct offsetinfo *p = (struct offsetinfo *) vp;
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SIM_DESC sd = p->sd;
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int offset = p->offset;
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if ((bfd_section_flags (s) & SEC_ALLOC))
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{
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bfd_vma vma = bfd_section_vma (s);
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bfd_set_section_vma (s, vma + offset);
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}
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/* This seems clumsy and inaccurate, but let's stick to doing it the
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same way as sim_analyze_program for consistency. */
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if (strcmp (bfd_section_name (s), ".text") == 0)
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STATE_TEXT_START (sd) = bfd_section_vma (s);
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}
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/* Adjust the start-address, LMA and VMA of a SD. Must be called
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after sim_analyze_program. */
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static void
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cris_offset_sections (SIM_DESC sd, int offset)
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{
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struct bfd *abfd = STATE_PROG_BFD (sd);
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struct offsetinfo oi;
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/* Only happens for usage error. */
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if (abfd == NULL)
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return;
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oi.sd = sd;
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oi.offset = offset;
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bfd_map_over_sections (abfd, cris_set_section_offset_iterator, &oi);
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bfd_set_start_address (abfd, bfd_get_start_address (abfd) + offset);
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STATE_START_ADDR (sd) = bfd_get_start_address (abfd);
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}
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/* BFD section iterator to find the highest and lowest allocated and
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non-allocated section addresses (plus one). */
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static void
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get_progbounds_iterator (bfd *abfd ATTRIBUTE_UNUSED, asection *s, void *vp)
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{
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struct progbounds *pbp = (struct progbounds *) vp;
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if ((bfd_section_flags (s) & SEC_ALLOC))
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{
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bfd_size_type sec_size = bfd_section_size (s);
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bfd_size_type sec_start = bfd_section_vma (s);
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bfd_size_type sec_end = sec_start + sec_size;
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if (sec_end > pbp->endmem)
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pbp->endmem = sec_end;
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if (sec_start < pbp->startmem)
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pbp->startmem = sec_start;
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if ((bfd_section_flags (s) & SEC_LOAD))
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{
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if (sec_end > pbp->end_loadmem)
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pbp->end_loadmem = sec_end;
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}
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else if (sec_start < pbp->start_nonloadmem)
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pbp->start_nonloadmem = sec_start;
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}
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}
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/* Get the program boundaries. Because not everything is covered by
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sections in ELF, notably the program headers, we use the program
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headers instead. */
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static void
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cris_get_progbounds (struct bfd *abfd, struct progbounds *pbp)
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{
|
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Elf_Internal_Phdr *phdr;
|
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int n_hdrs;
|
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int i;
|
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pbp->startmem = 0xffffffff;
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pbp->endmem = 0;
|
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pbp->end_loadmem = 0;
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pbp->start_nonloadmem = 0xffffffff;
|
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|
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/* In case we're ever used for something other than ELF, use the
|
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generic method. */
|
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if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
|
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{
|
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bfd_map_over_sections (abfd, get_progbounds_iterator, pbp);
|
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return;
|
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}
|
||
|
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phdr = elf_tdata (abfd)->phdr;
|
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n_hdrs = elf_elfheader (abfd)->e_phnum;
|
||
|
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/* We're only interested in PT_LOAD; all necessary information
|
||
should be covered by that. */
|
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for (i = 0; i < n_hdrs; i++)
|
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{
|
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if (phdr[i].p_type != PT_LOAD)
|
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continue;
|
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|
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if (phdr[i].p_paddr < pbp->startmem)
|
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pbp->startmem = phdr[i].p_paddr;
|
||
|
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if (phdr[i].p_paddr + phdr[i].p_memsz > pbp->endmem)
|
||
pbp->endmem = phdr[i].p_paddr + phdr[i].p_memsz;
|
||
|
||
if (phdr[i].p_paddr + phdr[i].p_filesz > pbp->end_loadmem)
|
||
pbp->end_loadmem = phdr[i].p_paddr + phdr[i].p_filesz;
|
||
|
||
if (phdr[i].p_memsz > phdr[i].p_filesz
|
||
&& phdr[i].p_paddr + phdr[i].p_filesz < pbp->start_nonloadmem)
|
||
pbp->start_nonloadmem = phdr[i].p_paddr + phdr[i].p_filesz;
|
||
}
|
||
}
|
||
|
||
/* Parameter communication by static variables, hmm... Oh well, for
|
||
simplicity. */
|
||
static bfd_vma exec_load_addr;
|
||
static bfd_vma interp_load_addr;
|
||
static bfd_vma interp_start_addr;
|
||
|
||
/* Supposed to mimic Linux' "NEW_AUX_ENT (AT_PHDR, load_addr + exec->e_phoff)". */
|
||
|
||
static USI
|
||
aux_ent_phdr (struct bfd *ebfd)
|
||
{
|
||
return elf_elfheader (ebfd)->e_phoff + exec_load_addr;
|
||
}
|
||
|
||
/* We just pass on the header info; we don't have our own idea of the
|
||
program header entry size. */
|
||
|
||
static USI
|
||
aux_ent_phent (struct bfd *ebfd)
|
||
{
|
||
return elf_elfheader (ebfd)->e_phentsize;
|
||
}
|
||
|
||
/* Like "NEW_AUX_ENT(AT_PHNUM, exec->e_phnum)". */
|
||
|
||
static USI
|
||
aux_ent_phnum (struct bfd *ebfd)
|
||
{
|
||
return elf_elfheader (ebfd)->e_phnum;
|
||
}
|
||
|
||
/* Like "NEW_AUX_ENT(AT_BASE, interp_load_addr)". */
|
||
|
||
static USI
|
||
aux_ent_base (struct bfd *ebfd)
|
||
{
|
||
return interp_load_addr;
|
||
}
|
||
|
||
/* Like "NEW_AUX_ENT(AT_ENTRY, exec->e_entry)". */
|
||
|
||
static USI
|
||
aux_ent_entry (struct bfd *ebfd)
|
||
{
|
||
ASSERT (elf_elfheader (ebfd)->e_entry == bfd_get_start_address (ebfd));
|
||
return elf_elfheader (ebfd)->e_entry;
|
||
}
|
||
|
||
/* Helper for cris_handle_interpreter: like sim_write, but load at
|
||
interp_load_addr offset. */
|
||
|
||
static uint64_t
|
||
cris_write_interp (SIM_DESC sd, uint64_t mem, const void *buf, uint64_t length)
|
||
{
|
||
return sim_write (sd, mem + interp_load_addr, buf, length);
|
||
}
|
||
|
||
/* Cater to the presence of an interpreter: load it and set
|
||
interp_start_addr. Return FALSE if there was an error, TRUE if
|
||
everything went fine, including an interpreter being absent and
|
||
the program being in a non-ELF format. */
|
||
|
||
static bfd_boolean
|
||
cris_handle_interpreter (SIM_DESC sd, struct bfd *abfd)
|
||
{
|
||
int i, n_hdrs;
|
||
char *interp = NULL;
|
||
struct bfd *ibfd;
|
||
bfd_boolean ok = FALSE;
|
||
Elf_Internal_Phdr *phdr;
|
||
|
||
if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
|
||
return TRUE;
|
||
|
||
phdr = elf_tdata (abfd)->phdr;
|
||
n_hdrs = aux_ent_phnum (abfd);
|
||
|
||
/* Check the program headers for presence of an interpreter. */
|
||
for (i = 0; i < n_hdrs; i++)
|
||
{
|
||
int interplen;
|
||
bfd_size_type interpsiz;
|
||
struct progbounds interp_bounds;
|
||
|
||
if (phdr[i].p_type != PT_INTERP)
|
||
continue;
|
||
|
||
/* Get the name of the interpreter, prepended with the sysroot
|
||
(empty if absent). */
|
||
interplen = phdr[i].p_filesz;
|
||
interp = xmalloc (interplen + strlen (simulator_sysroot));
|
||
strcpy (interp, simulator_sysroot);
|
||
|
||
/* Read in the name. */
|
||
if (bfd_seek (abfd, phdr[i].p_offset, SEEK_SET) != 0
|
||
|| (bfd_read (interp + strlen (simulator_sysroot), interplen, abfd)
|
||
!= interplen))
|
||
goto interpname_failed;
|
||
|
||
/* Like Linux, require the string to be 0-terminated. */
|
||
if (interp[interplen + strlen (simulator_sysroot) - 1] != 0)
|
||
goto interpname_failed;
|
||
|
||
/* Inspect the interpreter. */
|
||
ibfd = bfd_openr (interp, STATE_TARGET (sd));
|
||
if (ibfd == NULL)
|
||
goto interpname_failed;
|
||
|
||
/* The interpreter is at least something readable to BFD; make
|
||
sure it's an ELF non-archive file. */
|
||
if (!bfd_check_format (ibfd, bfd_object)
|
||
|| bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
|
||
goto interp_failed;
|
||
|
||
/* Check the layout of the interpreter. */
|
||
cris_get_progbounds (ibfd, &interp_bounds);
|
||
|
||
/* Round down to pagesize the start page and up the endpage.
|
||
Don't round the *load and *nonload members. */
|
||
interp_bounds.startmem &= ~8191;
|
||
interp_bounds.endmem = (interp_bounds.endmem + 8191) & ~8191;
|
||
|
||
/* Until we need a more dynamic solution, assume we can put the
|
||
interpreter at this fixed location. NB: this is not what
|
||
happens for Linux 2008-12-28, but it could and might and
|
||
perhaps should. */
|
||
interp_load_addr = 0x40000;
|
||
interpsiz = interp_bounds.endmem - interp_bounds.startmem;
|
||
/* interp_filesiz = interp_bounds.end_loadmem - interp_bounds.startmem; */
|
||
|
||
/* If we have a non-DSO or interpreter starting at the wrong
|
||
address, bail. */
|
||
if (interp_bounds.startmem != 0
|
||
|| interpsiz + interp_load_addr >= exec_load_addr)
|
||
goto interp_failed;
|
||
|
||
/* We don't have the API to get the address of a simulator
|
||
memory area, so we go via a temporary area. Luckily, the
|
||
interpreter is supposed to be small, less than 0x40000
|
||
bytes. */
|
||
sim_do_commandf (sd, "memory region 0x%" PRIx64 ",0x%" PRIx64,
|
||
(uint64_t) interp_load_addr, (uint64_t) interpsiz);
|
||
|
||
/* Now that memory for the interpreter is defined, load it. */
|
||
if (!cris_load_elf_file (sd, ibfd, cris_write_interp))
|
||
goto interp_failed;
|
||
|
||
/* It's no use setting STATE_START_ADDR, because it gets
|
||
overwritten by a sim_analyze_program call in sim_load. Let's
|
||
just store it locally. */
|
||
interp_start_addr
|
||
= (bfd_get_start_address (ibfd)
|
||
- interp_bounds.startmem + interp_load_addr);
|
||
|
||
/* Linux cares only about the first PT_INTERP, so let's ignore
|
||
the rest. */
|
||
goto all_done;
|
||
}
|
||
|
||
/* Register R10 should hold 0 at static start (no finifunc), but
|
||
that's the default, so don't bother. */
|
||
return TRUE;
|
||
|
||
all_done:
|
||
ok = TRUE;
|
||
|
||
interp_failed:
|
||
bfd_close (ibfd);
|
||
|
||
interpname_failed:
|
||
if (!ok)
|
||
sim_io_eprintf (sd,
|
||
"%s: could not load ELF interpreter `%s' for program `%s'\n",
|
||
STATE_MY_NAME (sd),
|
||
interp == NULL ? "(what's-its-name)" : interp,
|
||
bfd_get_filename (abfd));
|
||
free (interp);
|
||
return ok;
|
||
}
|
||
|
||
extern const SIM_MACH * const cris_sim_machs[];
|
||
|
||
/* Create an instance of the simulator. */
|
||
|
||
SIM_DESC
|
||
sim_open (SIM_OPEN_KIND kind, host_callback *callback, struct bfd *abfd,
|
||
char * const *argv)
|
||
{
|
||
char c;
|
||
int i;
|
||
USI startmem = 0;
|
||
USI endmem = CRIS_DEFAULT_MEM_SIZE;
|
||
USI endbrk = endmem;
|
||
USI stack_low = 0;
|
||
SIM_DESC sd = sim_state_alloc (kind, callback);
|
||
|
||
static const struct auxv_entries_s
|
||
{
|
||
bfd_byte id;
|
||
USI (*efn) (struct bfd *ebfd);
|
||
USI val;
|
||
} auxv_entries[] =
|
||
{
|
||
#define AUX_ENT(a, b) {a, NULL, b}
|
||
#define AUX_ENTF(a, f) {a, f, 0}
|
||
AUX_ENT (AT_HWCAP, 0),
|
||
AUX_ENT (AT_PAGESZ, 8192),
|
||
AUX_ENT (AT_CLKTCK, 100),
|
||
AUX_ENTF (AT_PHDR, aux_ent_phdr),
|
||
AUX_ENTF (AT_PHENT, aux_ent_phent),
|
||
AUX_ENTF (AT_PHNUM, aux_ent_phnum),
|
||
AUX_ENTF (AT_BASE, aux_ent_base),
|
||
AUX_ENT (AT_FLAGS, 0),
|
||
AUX_ENTF (AT_ENTRY, aux_ent_entry),
|
||
|
||
/* Or is root better? Maybe have it settable? */
|
||
AUX_ENT (AT_UID, 500),
|
||
AUX_ENT (AT_EUID, 500),
|
||
AUX_ENT (AT_GID, 500),
|
||
AUX_ENT (AT_EGID, 500),
|
||
AUX_ENT (AT_SECURE, 0),
|
||
AUX_ENT (AT_NULL, 0)
|
||
};
|
||
|
||
/* Can't initialize to "" below. It's either a GCC bug in old
|
||
releases (up to and including 2.95.3 (.4 in debian) or a bug in the
|
||
standard ;-) that the rest of the elements won't be initialized. */
|
||
bfd_byte sp_init[4] = {0, 0, 0, 0};
|
||
|
||
/* Set default options before parsing user options. */
|
||
STATE_MACHS (sd) = cris_sim_machs;
|
||
STATE_MODEL_NAME (sd) = "crisv32";
|
||
current_target_byte_order = BFD_ENDIAN_LITTLE;
|
||
|
||
/* The cpu data is kept in a separately allocated chunk of memory. */
|
||
if (sim_cpu_alloc_all_extra (sd, 0, sizeof (struct cris_sim_cpu))
|
||
!= SIM_RC_OK)
|
||
{
|
||
free_state (sd);
|
||
return 0;
|
||
}
|
||
|
||
if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
|
||
{
|
||
free_state (sd);
|
||
return 0;
|
||
}
|
||
|
||
/* Add the CRIS-specific option list to the simulator. */
|
||
if (sim_add_option_table (sd, NULL, cris_options) != SIM_RC_OK)
|
||
{
|
||
free_state (sd);
|
||
return 0;
|
||
}
|
||
|
||
/* The parser will print an error message for us, so we silently return. */
|
||
if (sim_parse_args (sd, argv) != SIM_RC_OK)
|
||
{
|
||
free_state (sd);
|
||
return 0;
|
||
}
|
||
|
||
/* check for/establish the reference program image */
|
||
if (sim_analyze_program (sd, STATE_PROG_FILE (sd), abfd) != SIM_RC_OK)
|
||
{
|
||
/* When there's an error, sim_analyze_program has already output
|
||
a message. Let's just clarify it, as "not an object file"
|
||
perhaps doesn't ring a bell. */
|
||
sim_io_eprintf (sd, "(not a CRIS program)\n");
|
||
free_state (sd);
|
||
return 0;
|
||
}
|
||
|
||
/* We might get called with the caller expecting us to get hold of
|
||
the bfd for ourselves, which would happen at the
|
||
sim_analyze_program call above. */
|
||
if (abfd == NULL)
|
||
abfd = STATE_PROG_BFD (sd);
|
||
|
||
/* Adjust the addresses of the program at this point. Unfortunately
|
||
this does not affect ELF program headers, so we have to handle
|
||
that separately. */
|
||
cris_offset_sections (sd, cris_program_offset);
|
||
|
||
if (abfd != NULL && bfd_get_arch (abfd) == bfd_arch_unknown)
|
||
{
|
||
if (STATE_PROG_FILE (sd) != NULL)
|
||
sim_io_eprintf (sd, "%s: `%s' is not a CRIS program\n",
|
||
STATE_MY_NAME (sd), STATE_PROG_FILE (sd));
|
||
else
|
||
sim_io_eprintf (sd, "%s: program to be run is not a CRIS program\n",
|
||
STATE_MY_NAME (sd));
|
||
free_state (sd);
|
||
return 0;
|
||
}
|
||
|
||
/* For CRIS simulator-specific use, we need to find out the bounds of
|
||
the program as well, which is not done by sim_analyze_program
|
||
above. */
|
||
if (abfd != NULL)
|
||
{
|
||
struct progbounds pb;
|
||
|
||
/* The sections should now be accessible using bfd functions. */
|
||
cris_get_progbounds (abfd, &pb);
|
||
|
||
/* We align the area that the program uses to page boundaries. */
|
||
startmem = pb.startmem & ~8191;
|
||
endbrk = pb.endmem;
|
||
endmem = (endbrk + 8191) & ~8191;
|
||
}
|
||
|
||
/* Find out how much room is needed for the environment and argv, create
|
||
that memory and fill it. Only do this when there's a program
|
||
specified.
|
||
|
||
TODO: Move this to sim_create_inferior and use STATE_PROG_ENVP. */
|
||
if (abfd != NULL && !cris_bare_iron)
|
||
{
|
||
const char *name = bfd_get_filename (abfd);
|
||
/* We use these maps to give the same behavior as the old xsim
|
||
simulator. */
|
||
USI envtop = 0x40000000;
|
||
USI stacktop = 0x3e000000;
|
||
USI envstart;
|
||
int envc;
|
||
int len = strlen (name) + 1;
|
||
USI epp, epp0;
|
||
USI stacklen;
|
||
char **prog_argv = STATE_PROG_ARGV (sd);
|
||
int my_argc = 0;
|
||
USI csp;
|
||
bfd_byte buf[4];
|
||
|
||
/* Count in the environment as well. */
|
||
for (envc = 0; environ[envc] != NULL; envc++)
|
||
len += strlen (environ[envc]) + 1;
|
||
|
||
for (i = 0; prog_argv[i] != NULL; my_argc++, i++)
|
||
len += strlen (prog_argv[i]) + 1;
|
||
|
||
envstart = (envtop - len) & ~8191;
|
||
|
||
/* Create read-only block for the environment strings. */
|
||
sim_core_attach (sd, NULL, 0, access_read, 0,
|
||
envstart, (len + 8191) & ~8191,
|
||
0, NULL, NULL);
|
||
|
||
/* This shouldn't happen. */
|
||
if (envstart < stacktop)
|
||
stacktop = envstart - 64 * 8192;
|
||
|
||
csp = stacktop;
|
||
|
||
/* Note that the linux kernel does not correctly compute the storage
|
||
needs for the static-exe AUX vector. */
|
||
|
||
csp -= ARRAY_SIZE (auxv_entries) * 4 * 2;
|
||
|
||
csp -= (envc + 1) * 4;
|
||
csp -= (my_argc + 1) * 4;
|
||
csp -= 4;
|
||
|
||
/* Write the target representation of the start-up-value for the
|
||
stack-pointer suitable for register initialization below. */
|
||
bfd_putl32 (csp, sp_init);
|
||
|
||
/* If we make this 1M higher; say 8192*1024, we have to take
|
||
special precautions for pthreads, because pthreads assumes that
|
||
the memory that low isn't mmapped, and that it can mmap it
|
||
without fallback in case of failure (and we fail ungracefully
|
||
long before *that*: the memory isn't accounted for in our mmap
|
||
list). */
|
||
stack_low = (csp - (7168*1024)) & ~8191;
|
||
|
||
stacklen = stacktop - stack_low;
|
||
|
||
/* Tee hee, we have an executable stack. Well, it's necessary to
|
||
test GCC trampolines... */
|
||
sim_core_attach (sd, NULL, 0, access_read_write_exec, 0,
|
||
stack_low, stacklen,
|
||
0, NULL, NULL);
|
||
|
||
epp = epp0 = envstart;
|
||
|
||
/* Can't use sim_core_write_unaligned_4 without everything
|
||
initialized when tracing, and then these writes would get into
|
||
the trace. */
|
||
#define write_dword(addr, data) \
|
||
do \
|
||
{ \
|
||
USI data_ = data; \
|
||
USI addr_ = addr; \
|
||
bfd_putl32 (data_, buf); \
|
||
if (sim_core_write_buffer (sd, NULL, NULL_CIA, buf, addr_, 4) != 4)\
|
||
goto abandon_chip; \
|
||
} \
|
||
while (0)
|
||
|
||
write_dword (csp, my_argc);
|
||
csp += 4;
|
||
|
||
for (i = 0; i < my_argc; i++, csp += 4)
|
||
{
|
||
size_t strln = strlen (prog_argv[i]) + 1;
|
||
|
||
if (sim_core_write_buffer (sd, NULL, NULL_CIA, prog_argv[i], epp,
|
||
strln)
|
||
!= strln)
|
||
goto abandon_chip;
|
||
|
||
write_dword (csp, envstart + epp - epp0);
|
||
epp += strln;
|
||
}
|
||
|
||
write_dword (csp, 0);
|
||
csp += 4;
|
||
|
||
for (i = 0; i < envc; i++, csp += 4)
|
||
{
|
||
unsigned int strln = strlen (environ[i]) + 1;
|
||
|
||
if (sim_core_write_buffer (sd, NULL, NULL_CIA, environ[i], epp, strln)
|
||
!= strln)
|
||
goto abandon_chip;
|
||
|
||
write_dword (csp, envstart + epp - epp0);
|
||
epp += strln;
|
||
}
|
||
|
||
write_dword (csp, 0);
|
||
csp += 4;
|
||
|
||
/* The load address of the executable could presumably be
|
||
different than the lowest used memory address, but let's
|
||
stick to simplicity until needed. And
|
||
cris_handle_interpreter might change startmem and endmem, so
|
||
let's set it now. */
|
||
exec_load_addr = startmem;
|
||
|
||
if (!cris_handle_interpreter (sd, abfd))
|
||
goto abandon_chip;
|
||
|
||
if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
|
||
for (i = 0; i < ARRAY_SIZE (auxv_entries); i++)
|
||
{
|
||
write_dword (csp, auxv_entries[i].id);
|
||
write_dword (csp + 4,
|
||
auxv_entries[i].efn != NULL
|
||
? (*auxv_entries[i].efn) (abfd)
|
||
: auxv_entries[i].val);
|
||
csp += 4 + 4;
|
||
}
|
||
}
|
||
|
||
/* Allocate core managed memory if none specified by user. */
|
||
if (sim_core_read_buffer (sd, NULL, read_map, &c, startmem, 1) == 0)
|
||
sim_do_commandf (sd, "memory region 0x%" PRIx32 ",0x%" PRIx32,
|
||
startmem, endmem - startmem);
|
||
|
||
/* Allocate simulator I/O managed memory if none specified by user. */
|
||
#if WITH_HW
|
||
if (cris_have_900000xxif)
|
||
sim_hw_parse (sd, "/core/%s/reg %#x %i", "cris_900000xx", 0x90000000, 0x100);
|
||
#else
|
||
/* With the option disabled, nothing should be able to set this variable.
|
||
We should "use" it, though, and why not assert that it isn't set. */
|
||
ASSERT (! cris_have_900000xxif);
|
||
#endif
|
||
|
||
/* Establish any remaining configuration options. */
|
||
if (sim_config (sd) != SIM_RC_OK)
|
||
{
|
||
abandon_chip:
|
||
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 = cris_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);
|
||
struct cris_sim_cpu *cris_cpu = CRIS_SIM_CPU (cpu);
|
||
|
||
CPU_CPU_DESC (cpu) = cd;
|
||
CPU_DISASSEMBLER (cpu) = cris_disassemble_insn;
|
||
|
||
/* See cris_option_handler for the reason why this is needed. */
|
||
CPU_CRIS_MISC_PROFILE (cpu)->flags = STATE_TRACE_FLAGS (sd)[0];
|
||
|
||
/* Set SP to the stack we allocated above. */
|
||
(* CPU_REG_STORE (cpu)) (cpu, H_GR_SP, (const unsigned char *) sp_init, 4);
|
||
|
||
/* Set the simulator environment data. */
|
||
cris_cpu->highest_mmapped_page = NULL;
|
||
cris_cpu->endmem = endmem;
|
||
cris_cpu->endbrk = endbrk;
|
||
cris_cpu->stack_low = stack_low;
|
||
cris_cpu->syscalls = 0;
|
||
cris_cpu->m1threads = 0;
|
||
cris_cpu->threadno = 0;
|
||
cris_cpu->max_threadid = 0;
|
||
cris_cpu->thread_data = NULL;
|
||
memset (cris_cpu->sighandler, 0, sizeof (cris_cpu->sighandler));
|
||
cris_cpu->make_thread_cpu_data = NULL;
|
||
cris_cpu->thread_cpu_data_size = 0;
|
||
#if WITH_HW
|
||
cris_cpu->deliver_interrupt = NULL;
|
||
#endif
|
||
}
|
||
#if WITH_HW
|
||
/* Always be cycle-accurate and call before/after functions if
|
||
with-hardware. */
|
||
sim_profile_set_option (sd, "-model", PROFILE_MODEL_IDX, "on");
|
||
#endif
|
||
}
|
||
|
||
cris_set_callbacks (callback);
|
||
|
||
return sd;
|
||
}
|
||
|
||
SIM_RC
|
||
sim_create_inferior (SIM_DESC sd, struct bfd *abfd,
|
||
char * const *argv,
|
||
char * const *env)
|
||
{
|
||
SIM_CPU *current_cpu = STATE_CPU (sd, 0);
|
||
host_callback *cb = STATE_CALLBACK (sd);
|
||
bfd_vma addr;
|
||
|
||
if (sd != NULL)
|
||
addr = cris_start_address != (USI) -1
|
||
? cris_start_address
|
||
: (interp_start_addr != 0
|
||
? interp_start_addr
|
||
: bfd_get_start_address (abfd));
|
||
else
|
||
addr = 0;
|
||
sim_pc_set (current_cpu, addr);
|
||
|
||
/* Standalone mode (i.e. `run`) will take care of the argv for us in
|
||
sim_open() -> sim_parse_args(). But in debug mode (i.e. 'target sim'
|
||
with `gdb`), we need to handle it because the user can change the
|
||
argv on the fly via gdb's 'run'. */
|
||
if (STATE_PROG_ARGV (sd) != argv)
|
||
{
|
||
freeargv (STATE_PROG_ARGV (sd));
|
||
STATE_PROG_ARGV (sd) = dupargv (argv);
|
||
}
|
||
|
||
if (STATE_PROG_ENVP (sd) != env)
|
||
{
|
||
freeargv (STATE_PROG_ENVP (sd));
|
||
STATE_PROG_ENVP (sd) = dupargv (env);
|
||
}
|
||
|
||
cb->argv = STATE_PROG_ARGV (sd);
|
||
cb->envp = STATE_PROG_ENVP (sd);
|
||
|
||
return SIM_RC_OK;
|
||
}
|
||
|
||
/* Disassemble an instruction. */
|
||
|
||
static void
|
||
cris_disassemble_insn (SIM_CPU *cpu,
|
||
const CGEN_INSN *insn ATTRIBUTE_UNUSED,
|
||
const ARGBUF *abuf ATTRIBUTE_UNUSED,
|
||
IADDR pc, char *buf)
|
||
{
|
||
disassembler_ftype pinsn;
|
||
struct disassemble_info disasm_info;
|
||
SFILE sfile;
|
||
SIM_DESC sd = CPU_STATE (cpu);
|
||
|
||
sfile.buffer = sfile.current = buf;
|
||
INIT_DISASSEMBLE_INFO (disasm_info, (FILE *) &sfile,
|
||
(fprintf_ftype) sim_disasm_sprintf,
|
||
(fprintf_styled_ftype) sim_disasm_styled_sprintf);
|
||
disasm_info.endian = BFD_ENDIAN_LITTLE;
|
||
disasm_info.read_memory_func = sim_disasm_read_memory;
|
||
disasm_info.memory_error_func = sim_disasm_perror_memory;
|
||
disasm_info.application_data = cpu;
|
||
pinsn = cris_get_disassembler (STATE_PROG_BFD (sd));
|
||
(*pinsn) (pc, &disasm_info);
|
||
}
|