/* Simulator option handling. Copyright (C) 1996, 1997, 2004 Free Software Foundation, Inc. Contributed by Cygnus Support. This file is part of GDB, the GNU debugger. 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 "sim-main.h" #ifdef HAVE_STRING_H #include #else #ifdef HAVE_STRINGS_H #include #endif #endif #ifdef HAVE_STDLIB_H #include #endif #include #include "libiberty.h" #include "sim-options.h" #include "sim-io.h" #include "sim-assert.h" #include "bfd.h" /* Add a set of options to the simulator. TABLE is an array of OPTIONS terminated by a NULL `opt.name' entry. This is intended to be called by modules in their `install' handler. */ SIM_RC sim_add_option_table (SIM_DESC sd, sim_cpu *cpu, const OPTION *table) { struct option_list *ol = ((struct option_list *) xmalloc (sizeof (struct option_list))); /* Note: The list is constructed in the reverse order we're called so later calls will override earlier ones (in case that ever happens). This is the intended behaviour. */ if (cpu) { ol->next = CPU_OPTIONS (cpu); ol->options = table; CPU_OPTIONS (cpu) = ol; } else { ol->next = STATE_OPTIONS (sd); ol->options = table; STATE_OPTIONS (sd) = ol; } return SIM_RC_OK; } /* Standard option table. Modules may specify additional ones. The caller of sim_parse_args may also specify additional options by calling sim_add_option_table first. */ static DECLARE_OPTION_HANDLER (standard_option_handler); /* FIXME: We shouldn't print in --help output options that aren't usable. Some fine tuning will be necessary. One can either move less general options to another table or use a HAVE_FOO macro to ifdef out unavailable options. */ /* ??? One might want to conditionally compile out the entries that aren't enabled. There's a distinction, however, between options a simulator can't support and options that haven't been configured in. Certainly options a simulator can't support shouldn't appear in the output of --help. Whether the same thing applies to options that haven't been configured in or not isn't something I can get worked up over. [Note that conditionally compiling them out might simply involve moving the option to another table.] If you decide to conditionally compile them out as well, delete this comment and add a comment saying that that is the rule. */ typedef enum { OPTION_DEBUG_INSN = OPTION_START, OPTION_DEBUG_FILE, OPTION_DO_COMMAND, OPTION_ARCHITECTURE, OPTION_TARGET, OPTION_ARCHITECTURE_INFO, OPTION_ENVIRONMENT, OPTION_ALIGNMENT, OPTION_VERBOSE, #if defined (SIM_HAVE_BIENDIAN) OPTION_ENDIAN, #endif OPTION_DEBUG, #ifdef SIM_HAVE_FLATMEM OPTION_MEM_SIZE, #endif OPTION_HELP, #ifdef SIM_H8300 /* FIXME: Should be movable to h8300 dir. */ OPTION_H8300H, OPTION_H8300S, OPTION_H8300SX, #endif OPTION_LOAD_LMA, OPTION_LOAD_VMA, OPTION_SYSROOT } STANDARD_OPTIONS; static const OPTION standard_options[] = { { {"verbose", no_argument, NULL, OPTION_VERBOSE}, 'v', NULL, "Verbose output", standard_option_handler }, #if defined (SIM_HAVE_BIENDIAN) /* ??? && WITH_TARGET_BYTE_ORDER == 0 */ { {"endian", required_argument, NULL, OPTION_ENDIAN}, 'E', "big|little", "Set endianness", standard_option_handler }, #endif #ifdef SIM_HAVE_ENVIRONMENT /* This option isn't supported unless all choices are supported in keeping with the goal of not printing in --help output things the simulator can't do [as opposed to things that just haven't been configured in]. */ { {"environment", required_argument, NULL, OPTION_ENVIRONMENT}, '\0', "user|virtual|operating", "Set running environment", standard_option_handler }, #endif { {"alignment", required_argument, NULL, OPTION_ALIGNMENT}, '\0', "strict|nonstrict|forced", "Set memory access alignment", standard_option_handler }, { {"debug", no_argument, NULL, OPTION_DEBUG}, 'D', NULL, "Print debugging messages", standard_option_handler }, { {"debug-insn", no_argument, NULL, OPTION_DEBUG_INSN}, '\0', NULL, "Print instruction debugging messages", standard_option_handler }, { {"debug-file", required_argument, NULL, OPTION_DEBUG_FILE}, '\0', "FILE NAME", "Specify debugging output file", standard_option_handler }, #ifdef SIM_H8300 /* FIXME: Should be movable to h8300 dir. */ { {"h8300h", no_argument, NULL, OPTION_H8300H}, 'h', NULL, "Indicate the CPU is H8/300H", standard_option_handler }, { {"h8300s", no_argument, NULL, OPTION_H8300S}, 'S', NULL, "Indicate the CPU is H8S", standard_option_handler }, { {"h8300sx", no_argument, NULL, OPTION_H8300SX}, 'x', NULL, "Indicate the CPU is H8SX", standard_option_handler }, #endif #ifdef SIM_HAVE_FLATMEM { {"mem-size", required_argument, NULL, OPTION_MEM_SIZE}, 'm', "MEMORY SIZE", "Specify memory size", standard_option_handler }, #endif { {"do-command", required_argument, NULL, OPTION_DO_COMMAND}, '\0', "COMMAND", ""/*undocumented*/, standard_option_handler }, { {"help", no_argument, NULL, OPTION_HELP}, 'H', NULL, "Print help information", standard_option_handler }, { {"architecture", required_argument, NULL, OPTION_ARCHITECTURE}, '\0', "MACHINE", "Specify the architecture to use", standard_option_handler }, { {"architecture-info", no_argument, NULL, OPTION_ARCHITECTURE_INFO}, '\0', NULL, "List supported architectures", standard_option_handler }, { {"info-architecture", no_argument, NULL, OPTION_ARCHITECTURE_INFO}, '\0', NULL, NULL, standard_option_handler }, { {"target", required_argument, NULL, OPTION_TARGET}, '\0', "BFDNAME", "Specify the object-code format for the object files", standard_option_handler }, #ifdef SIM_HANDLES_LMA { {"load-lma", no_argument, NULL, OPTION_LOAD_LMA}, '\0', NULL, #if SIM_HANDLES_LMA "Use VMA or LMA addresses when loading image (default LMA)", #else "Use VMA or LMA addresses when loading image (default VMA)", #endif standard_option_handler, "load-{lma,vma}" }, { {"load-vma", no_argument, NULL, OPTION_LOAD_VMA}, '\0', NULL, "", standard_option_handler, "" }, #endif { {"sysroot", required_argument, NULL, OPTION_SYSROOT}, '\0', "SYSROOT", "Root for system calls with absolute file-names and cwd at start", standard_option_handler }, { {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL } }; static SIM_RC standard_option_handler (SIM_DESC sd, sim_cpu *cpu, int opt, char *arg, int is_command) { int i,n; switch ((STANDARD_OPTIONS) opt) { case OPTION_VERBOSE: STATE_VERBOSE_P (sd) = 1; break; #ifdef SIM_HAVE_BIENDIAN case OPTION_ENDIAN: if (strcmp (arg, "big") == 0) { if (WITH_TARGET_BYTE_ORDER == LITTLE_ENDIAN) { sim_io_eprintf (sd, "Simulator compiled for little endian only.\n"); return SIM_RC_FAIL; } /* FIXME:wip: Need to set something in STATE_CONFIG. */ current_target_byte_order = BIG_ENDIAN; } else if (strcmp (arg, "little") == 0) { if (WITH_TARGET_BYTE_ORDER == BIG_ENDIAN) { sim_io_eprintf (sd, "Simulator compiled for big endian only.\n"); return SIM_RC_FAIL; } /* FIXME:wip: Need to set something in STATE_CONFIG. */ current_target_byte_order = LITTLE_ENDIAN; } else { sim_io_eprintf (sd, "Invalid endian specification `%s'\n", arg); return SIM_RC_FAIL; } break; #endif case OPTION_ENVIRONMENT: if (strcmp (arg, "user") == 0) STATE_ENVIRONMENT (sd) = USER_ENVIRONMENT; else if (strcmp (arg, "virtual") == 0) STATE_ENVIRONMENT (sd) = VIRTUAL_ENVIRONMENT; else if (strcmp (arg, "operating") == 0) STATE_ENVIRONMENT (sd) = OPERATING_ENVIRONMENT; else { sim_io_eprintf (sd, "Invalid environment specification `%s'\n", arg); return SIM_RC_FAIL; } if (WITH_ENVIRONMENT != ALL_ENVIRONMENT && WITH_ENVIRONMENT != STATE_ENVIRONMENT (sd)) { char *type; switch (WITH_ENVIRONMENT) { case USER_ENVIRONMENT: type = "user"; break; case VIRTUAL_ENVIRONMENT: type = "virtual"; break; case OPERATING_ENVIRONMENT: type = "operating"; break; } sim_io_eprintf (sd, "Simulator compiled for the %s environment only.\n", type); return SIM_RC_FAIL; } break; case OPTION_ALIGNMENT: if (strcmp (arg, "strict") == 0) { if (WITH_ALIGNMENT == 0 || WITH_ALIGNMENT == STRICT_ALIGNMENT) { current_alignment = STRICT_ALIGNMENT; break; } } else if (strcmp (arg, "nonstrict") == 0) { if (WITH_ALIGNMENT == 0 || WITH_ALIGNMENT == NONSTRICT_ALIGNMENT) { current_alignment = NONSTRICT_ALIGNMENT; break; } } else if (strcmp (arg, "forced") == 0) { if (WITH_ALIGNMENT == 0 || WITH_ALIGNMENT == FORCED_ALIGNMENT) { current_alignment = FORCED_ALIGNMENT; break; } } else { sim_io_eprintf (sd, "Invalid alignment specification `%s'\n", arg); return SIM_RC_FAIL; } switch (WITH_ALIGNMENT) { case STRICT_ALIGNMENT: sim_io_eprintf (sd, "Simulator compiled for strict alignment only.\n"); break; case NONSTRICT_ALIGNMENT: sim_io_eprintf (sd, "Simulator compiled for nonstrict alignment only.\n"); break; case FORCED_ALIGNMENT: sim_io_eprintf (sd, "Simulator compiled for forced alignment only.\n"); break; } return SIM_RC_FAIL; case OPTION_DEBUG: if (! WITH_DEBUG) sim_io_eprintf (sd, "Debugging not compiled in, `-D' ignored\n"); else { for (n = 0; n < MAX_NR_PROCESSORS; ++n) for (i = 0; i < MAX_DEBUG_VALUES; ++i) CPU_DEBUG_FLAGS (STATE_CPU (sd, n))[i] = 1; } break; case OPTION_DEBUG_INSN : if (! WITH_DEBUG) sim_io_eprintf (sd, "Debugging not compiled in, `--debug-insn' ignored\n"); else { for (n = 0; n < MAX_NR_PROCESSORS; ++n) CPU_DEBUG_FLAGS (STATE_CPU (sd, n))[DEBUG_INSN_IDX] = 1; } break; case OPTION_DEBUG_FILE : if (! WITH_DEBUG) sim_io_eprintf (sd, "Debugging not compiled in, `--debug-file' ignored\n"); else { FILE *f = fopen (arg, "w"); if (f == NULL) { sim_io_eprintf (sd, "Unable to open debug output file `%s'\n", arg); return SIM_RC_FAIL; } for (n = 0; n < MAX_NR_PROCESSORS; ++n) CPU_DEBUG_FILE (STATE_CPU (sd, n)) = f; } break; #ifdef SIM_H8300 /* FIXME: Can be moved to h8300 dir. */ case OPTION_H8300H: set_h8300h (bfd_mach_h8300h); break; case OPTION_H8300S: set_h8300h (bfd_mach_h8300s); break; case OPTION_H8300SX: set_h8300h (bfd_mach_h8300sx); break; #endif #ifdef SIM_HAVE_FLATMEM case OPTION_MEM_SIZE: { unsigned long ul = strtol (arg, NULL, 0); /* 16384: some minimal amount */ if (! isdigit (arg[0]) || ul < 16384) { sim_io_eprintf (sd, "Invalid memory size `%s'", arg); return SIM_RC_FAIL; } STATE_MEM_SIZE (sd) = ul; } break; #endif case OPTION_DO_COMMAND: sim_do_command (sd, arg); break; case OPTION_ARCHITECTURE: { const struct bfd_arch_info *ap = bfd_scan_arch (arg); if (ap == NULL) { sim_io_eprintf (sd, "Architecture `%s' unknown\n", arg); return SIM_RC_FAIL; } STATE_ARCHITECTURE (sd) = ap; break; } case OPTION_ARCHITECTURE_INFO: { const char **list = bfd_arch_list(); const char **lp; if (list == NULL) abort (); sim_io_printf (sd, "Possible architectures:"); for (lp = list; *lp != NULL; lp++) sim_io_printf (sd, " %s", *lp); sim_io_printf (sd, "\n"); free (list); break; } case OPTION_TARGET: { STATE_TARGET (sd) = xstrdup (arg); break; } case OPTION_LOAD_LMA: { STATE_LOAD_AT_LMA_P (sd) = 1; break; } case OPTION_LOAD_VMA: { STATE_LOAD_AT_LMA_P (sd) = 0; break; } case OPTION_HELP: sim_print_help (sd, is_command); if (STATE_OPEN_KIND (sd) == SIM_OPEN_STANDALONE) exit (0); /* FIXME: 'twould be nice to do something similar if gdb. */ break; case OPTION_SYSROOT: /* Don't leak memory in the odd event that there's lots of --sysroot=... options. */ if (simulator_sysroot[0] != '\0' && arg[0] != '\0') free (simulator_sysroot); simulator_sysroot = xstrdup (arg); break; } return SIM_RC_OK; } /* Add the standard option list to the simulator. */ SIM_RC standard_install (SIM_DESC sd) { SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); if (sim_add_option_table (sd, NULL, standard_options) != SIM_RC_OK) return SIM_RC_FAIL; #ifdef SIM_HANDLES_LMA STATE_LOAD_AT_LMA_P (sd) = SIM_HANDLES_LMA; #endif return SIM_RC_OK; } /* Return non-zero if arg is a duplicate argument. If ARG is NULL, initialize. */ #define ARG_HASH_SIZE 97 #define ARG_HASH(a) ((256 * (unsigned char) a[0] + (unsigned char) a[1]) % ARG_HASH_SIZE) static int dup_arg_p (arg) char *arg; { int hash; static char **arg_table = NULL; if (arg == NULL) { if (arg_table == NULL) arg_table = (char **) xmalloc (ARG_HASH_SIZE * sizeof (char *)); memset (arg_table, 0, ARG_HASH_SIZE * sizeof (char *)); return 0; } hash = ARG_HASH (arg); while (arg_table[hash] != NULL) { if (strcmp (arg, arg_table[hash]) == 0) return 1; /* We assume there won't be more than ARG_HASH_SIZE arguments so we don't check if the table is full. */ if (++hash == ARG_HASH_SIZE) hash = 0; } arg_table[hash] = arg; return 0; } /* Called by sim_open to parse the arguments. */ SIM_RC sim_parse_args (sd, argv) SIM_DESC sd; char **argv; { int c, i, argc, num_opts; char *p, *short_options; /* The `val' option struct entry is dynamically assigned for options that only come in the long form. ORIG_VAL is used to get the original value back. */ int *orig_val; struct option *lp, *long_options; const struct option_list *ol; const OPTION *opt; OPTION_HANDLER **handlers; sim_cpu **opt_cpu; SIM_RC result = SIM_RC_OK; /* Count the number of arguments. */ for (argc = 0; argv[argc] != NULL; ++argc) continue; /* Count the number of options. */ num_opts = 0; for (ol = STATE_OPTIONS (sd); ol != NULL; ol = ol->next) for (opt = ol->options; OPTION_VALID_P (opt); ++opt) ++num_opts; for (i = 0; i < MAX_NR_PROCESSORS; ++i) for (ol = CPU_OPTIONS (STATE_CPU (sd, i)); ol != NULL; ol = ol->next) for (opt = ol->options; OPTION_VALID_P (opt); ++opt) ++num_opts; /* Initialize duplicate argument checker. */ (void) dup_arg_p (NULL); /* Build the option table for getopt. */ long_options = NZALLOC (struct option, num_opts + 1); lp = long_options; short_options = NZALLOC (char, num_opts * 3 + 1); p = short_options; handlers = NZALLOC (OPTION_HANDLER *, OPTION_START + num_opts); orig_val = NZALLOC (int, OPTION_START + num_opts); opt_cpu = NZALLOC (sim_cpu *, OPTION_START + num_opts); /* Set '+' as first char so argument permutation isn't done. This is done to stop getopt_long returning options that appear after the target program. Such options should be passed unchanged into the program image. */ *p++ = '+'; for (i = OPTION_START, ol = STATE_OPTIONS (sd); ol != NULL; ol = ol->next) for (opt = ol->options; OPTION_VALID_P (opt); ++opt) { if (dup_arg_p (opt->opt.name)) continue; if (opt->shortopt != 0) { *p++ = opt->shortopt; if (opt->opt.has_arg == required_argument) *p++ = ':'; else if (opt->opt.has_arg == optional_argument) { *p++ = ':'; *p++ = ':'; } handlers[(unsigned char) opt->shortopt] = opt->handler; if (opt->opt.val != 0) orig_val[(unsigned char) opt->shortopt] = opt->opt.val; else orig_val[(unsigned char) opt->shortopt] = opt->shortopt; } if (opt->opt.name != NULL) { *lp = opt->opt; /* Dynamically assign `val' numbers for long options. */ lp->val = i++; handlers[lp->val] = opt->handler; orig_val[lp->val] = opt->opt.val; opt_cpu[lp->val] = NULL; ++lp; } } for (c = 0; c < MAX_NR_PROCESSORS; ++c) { sim_cpu *cpu = STATE_CPU (sd, c); for (ol = CPU_OPTIONS (cpu); ol != NULL; ol = ol->next) for (opt = ol->options; OPTION_VALID_P (opt); ++opt) { #if 0 /* Each option is prepended with --- so this greatly cuts down on the need for dup_arg_p checking. Maybe in the future it'll be needed so this is just commented out, and not deleted. */ if (dup_arg_p (opt->opt.name)) continue; #endif /* Don't allow short versions of cpu specific options for now. */ if (opt->shortopt != 0) { sim_io_eprintf (sd, "internal error, short cpu specific option"); result = SIM_RC_FAIL; break; } if (opt->opt.name != NULL) { char *name; *lp = opt->opt; /* Prepend --- to the option. */ asprintf (&name, "%s-%s", CPU_NAME (cpu), lp->name); lp->name = name; /* Dynamically assign `val' numbers for long options. */ lp->val = i++; handlers[lp->val] = opt->handler; orig_val[lp->val] = opt->opt.val; opt_cpu[lp->val] = cpu; ++lp; } } } /* Terminate the short and long option lists. */ *p = 0; lp->name = NULL; /* Ensure getopt is initialized. */ optind = 0; while (1) { int longind, optc; optc = getopt_long (argc, argv, short_options, long_options, &longind); if (optc == -1) { if (STATE_OPEN_KIND (sd) == SIM_OPEN_STANDALONE) STATE_PROG_ARGV (sd) = dupargv (argv + optind); break; } if (optc == '?') { result = SIM_RC_FAIL; break; } if ((*handlers[optc]) (sd, opt_cpu[optc], orig_val[optc], optarg, 0/*!is_command*/) == SIM_RC_FAIL) { result = SIM_RC_FAIL; break; } } zfree (long_options); zfree (short_options); zfree (handlers); zfree (opt_cpu); zfree (orig_val); return result; } /* Utility of sim_print_help to print a list of option tables. */ static void print_help (SIM_DESC sd, sim_cpu *cpu, const struct option_list *ol, int is_command) { const OPTION *opt; for ( ; ol != NULL; ol = ol->next) for (opt = ol->options; OPTION_VALID_P (opt); ++opt) { const int indent = 30; int comma, len; const OPTION *o; if (dup_arg_p (opt->opt.name)) continue; if (opt->doc == NULL) continue; if (opt->doc_name != NULL && opt->doc_name [0] == '\0') continue; sim_io_printf (sd, " "); comma = 0; len = 2; /* list any short options (aliases) for the current OPT */ if (!is_command) { o = opt; do { if (o->shortopt != '\0') { sim_io_printf (sd, "%s-%c", comma ? ", " : "", o->shortopt); len += (comma ? 2 : 0) + 2; if (o->arg != NULL) { if (o->opt.has_arg == optional_argument) { sim_io_printf (sd, "[%s]", o->arg); len += 1 + strlen (o->arg) + 1; } else { sim_io_printf (sd, " %s", o->arg); len += 1 + strlen (o->arg); } } comma = 1; } ++o; } while (OPTION_VALID_P (o) && o->doc == NULL); } /* list any long options (aliases) for the current OPT */ o = opt; do { const char *name; const char *cpu_prefix = cpu ? CPU_NAME (cpu) : NULL; if (o->doc_name != NULL) name = o->doc_name; else name = o->opt.name; if (name != NULL) { sim_io_printf (sd, "%s%s%s%s%s", comma ? ", " : "", is_command ? "" : "--", cpu ? cpu_prefix : "", cpu ? "-" : "", name); len += ((comma ? 2 : 0) + (is_command ? 0 : 2) + strlen (name)); if (o->arg != NULL) { if (o->opt.has_arg == optional_argument) { sim_io_printf (sd, "[=%s]", o->arg); len += 2 + strlen (o->arg) + 1; } else { sim_io_printf (sd, " %s", o->arg); len += 1 + strlen (o->arg); } } comma = 1; } ++o; } while (OPTION_VALID_P (o) && o->doc == NULL); if (len >= indent) { sim_io_printf (sd, "\n%*s", indent, ""); } else sim_io_printf (sd, "%*s", indent - len, ""); /* print the description, word wrap long lines */ { const char *chp = opt->doc; unsigned doc_width = 80 - indent; while (strlen (chp) >= doc_width) /* some slack */ { const char *end = chp + doc_width - 1; while (end > chp && !isspace (*end)) end --; if (end == chp) end = chp + doc_width - 1; /* The cast should be ok - its distances between to points in a string. */ sim_io_printf (sd, "%.*s\n%*s", (int) (end - chp), chp, indent, ""); chp = end; while (isspace (*chp) && *chp != '\0') chp++; } sim_io_printf (sd, "%s\n", chp); } } } /* Print help messages for the options. */ void sim_print_help (sd, is_command) SIM_DESC sd; int is_command; { if (STATE_OPEN_KIND (sd) == SIM_OPEN_STANDALONE) sim_io_printf (sd, "Usage: %s [options] program [program args]\n", STATE_MY_NAME (sd)); /* Initialize duplicate argument checker. */ (void) dup_arg_p (NULL); if (STATE_OPEN_KIND (sd) == SIM_OPEN_STANDALONE) sim_io_printf (sd, "Options:\n"); else sim_io_printf (sd, "Commands:\n"); print_help (sd, NULL, STATE_OPTIONS (sd), is_command); sim_io_printf (sd, "\n"); /* Print cpu-specific options. */ { int i; for (i = 0; i < MAX_NR_PROCESSORS; ++i) { sim_cpu *cpu = STATE_CPU (sd, i); if (CPU_OPTIONS (cpu) == NULL) continue; sim_io_printf (sd, "CPU %s specific options:\n", CPU_NAME (cpu)); print_help (sd, cpu, CPU_OPTIONS (cpu), is_command); sim_io_printf (sd, "\n"); } } sim_io_printf (sd, "Note: Depending on the simulator configuration some %ss\n", STATE_OPEN_KIND (sd) == SIM_OPEN_STANDALONE ? "option" : "command"); sim_io_printf (sd, " may not be applicable\n"); if (STATE_OPEN_KIND (sd) == SIM_OPEN_STANDALONE) { sim_io_printf (sd, "\n"); sim_io_printf (sd, "program args Arguments to pass to simulated program.\n"); sim_io_printf (sd, " Note: Very few simulators support this.\n"); } } /* Utility of sim_args_command to find the closest match for a command. Commands that have "-" in them can be specified as separate words. e.g. sim memory-region 0x800000,0x4000 or sim memory region 0x800000,0x4000 If CPU is non-null, use its option table list, otherwise use the main one. *PARGI is where to start looking in ARGV. It is updated to point past the found option. */ static const OPTION * find_match (SIM_DESC sd, sim_cpu *cpu, char *argv[], int *pargi) { const struct option_list *ol; const OPTION *opt; /* most recent option match */ const OPTION *matching_opt = NULL; int matching_argi = -1; if (cpu) ol = CPU_OPTIONS (cpu); else ol = STATE_OPTIONS (sd); /* Skip passed elements specified by *PARGI. */ argv += *pargi; for ( ; ol != NULL; ol = ol->next) for (opt = ol->options; OPTION_VALID_P (opt); ++opt) { int argi = 0; const char *name = opt->opt.name; if (name == NULL) continue; while (argv [argi] != NULL && strncmp (name, argv [argi], strlen (argv [argi])) == 0) { name = &name [strlen (argv[argi])]; if (name [0] == '-') { /* leading match ...-d-e-f - continue search */ name ++; /* skip `-' */ argi ++; continue; } else if (name [0] == '\0') { /* exact match ... - better than before? */ if (argi > matching_argi) { matching_argi = argi; matching_opt = opt; } break; } else break; } } *pargi = matching_argi; return matching_opt; } SIM_RC sim_args_command (SIM_DESC sd, char *cmd) { /* something to do? */ if (cmd == NULL) return SIM_RC_OK; /* FIXME - perhaps help would be better */ if (cmd [0] == '-') { /* user specified - ... form? */ char **argv = buildargv (cmd); SIM_RC rc = sim_parse_args (sd, argv); freeargv (argv); return rc; } else { char **argv = buildargv (cmd); const OPTION *matching_opt = NULL; int matching_argi; sim_cpu *cpu; if (argv [0] == NULL) return SIM_RC_OK; /* FIXME - perhaps help would be better */ /* First check for a cpu selector. */ { char *cpu_name = xstrdup (argv[0]); char *hyphen = strchr (cpu_name, '-'); if (hyphen) *hyphen = 0; cpu = sim_cpu_lookup (sd, cpu_name); if (cpu) { /* If -, point argv[0] at . */ if (hyphen) { matching_argi = 0; argv[0] += hyphen - cpu_name + 1; } else matching_argi = 1; matching_opt = find_match (sd, cpu, argv, &matching_argi); /* If hyphen found restore argv[0]. */ if (hyphen) argv[0] -= hyphen - cpu_name + 1; } free (cpu_name); } /* If that failed, try the main table. */ if (matching_opt == NULL) { matching_argi = 0; matching_opt = find_match (sd, NULL, argv, &matching_argi); } if (matching_opt != NULL) { switch (matching_opt->opt.has_arg) { case no_argument: if (argv [matching_argi + 1] == NULL) matching_opt->handler (sd, cpu, matching_opt->opt.val, NULL, 1/*is_command*/); else sim_io_eprintf (sd, "Command `%s' takes no arguments\n", matching_opt->opt.name); break; case optional_argument: if (argv [matching_argi + 1] == NULL) matching_opt->handler (sd, cpu, matching_opt->opt.val, NULL, 1/*is_command*/); else if (argv [matching_argi + 2] == NULL) matching_opt->handler (sd, cpu, matching_opt->opt.val, argv [matching_argi + 1], 1/*is_command*/); else sim_io_eprintf (sd, "Command `%s' requires no more than one argument\n", matching_opt->opt.name); break; case required_argument: if (argv [matching_argi + 1] == NULL) sim_io_eprintf (sd, "Command `%s' requires an argument\n", matching_opt->opt.name); else if (argv [matching_argi + 2] == NULL) matching_opt->handler (sd, cpu, matching_opt->opt.val, argv [matching_argi + 1], 1/*is_command*/); else sim_io_eprintf (sd, "Command `%s' requires only one argument\n", matching_opt->opt.name); } freeargv (argv); return SIM_RC_OK; } freeargv (argv); } /* didn't find anything that remotly matched */ return SIM_RC_FAIL; }