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Diffstat (limited to 'gdb/kod.c')
| -rw-r--r-- | gdb/kod.c | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/gdb/kod.c b/gdb/kod.c new file mode 100644 index 00000000000..a0969109cf8 --- /dev/null +++ b/gdb/kod.c @@ -0,0 +1,239 @@ +/* Kernel Object Display generic routines and callbacks + Copyright 1998, 1999 Free Software Foundation, Inc. + + Written by Fernando Nasser <fnasser@cygnus.com> for Cygnus Solutions. + + This file is part of GDB. + + 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 of the License, 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 "defs.h" +#include "command.h" +#include "gdbcmd.h" +#include "target.h" +#include "gdb_string.h" + +/* Prototypes for exported functions. */ +void _initialize_kod (void); + +/* Prototypes for local functions. */ +static void show_kod (char *, int); +static void info_kod_command (char *, int); +static void load_kod_library (char *); + +/* Prototypes for callbacks. These are passed into the KOD modules. */ +static void gdb_kod_display (char *); +static void gdb_kod_query (char *, char *, int *); + +/* These functions are imported from the KOD module. + + gdb_kod_open - initiates the KOD connection to the remote. The + first argument is the display function the module should use to + communicate with the user. The second argument is the query + function the display should use to communicate with the target. + This should call error() if there is an error. Otherwise it should + return a malloc()d string of the form: + + NAME VERSION - DESCRIPTION + + Neither NAME nor VERSION should contain a hyphen. + + + gdb_kod_request - This is used when the user enters an "info + <module>" request. The remaining arguments are passed as the first + argument. The second argument is the standard `from_tty' + argument. + + + gdb_kod_close - This is called when the KOD connection to the + remote should be terminated. */ + +static char *(*gdb_kod_open) (void *, void *); +static void (*gdb_kod_request) (char *, int); +static void (*gdb_kod_close) (); + + +/* Name of inferior's operating system. */ +char *operating_system; + +/* We save a copy of the OS so that we can properly reset when + switching OS's. */ +static char *old_operating_system; + +/* Functions imported from the library for all supported OSes. + FIXME: we really should do something better, such as dynamically + loading the KOD modules. */ +extern char *ecos_kod_open (void *, void *); +extern void ecos_kod_request (char *, int); +extern void ecos_kod_close (); +extern char *cisco_kod_open (void *, void *); +extern void cisco_kod_request (char *, int); +extern void cisco_kod_close (); + + +/* Print a line of data generated by the module. */ + +static void +gdb_kod_display (char *arg) +{ + printf_filtered ("%s", arg); +} + +/* Queries the target on behalf of the module. */ + +static void +gdb_kod_query (char *arg, char *result, int *maxsiz) +{ + int bufsiz = 0; + + /* Check if current target has remote_query capabilities. + If not, it does not have kod either. */ + if (! current_target.to_query) + { + strcpy (result, + "ERR: Kernel Object Display not supported by current target\n"); + return; + } + + /* Just get the maximum buffer size. */ + target_query ((int) 'K', 0, 0, &bufsiz); + + /* Check if *we* were called just for getting the buffer size. */ + if (*maxsiz == 0) + { + *maxsiz = bufsiz; + strcpy (result, "OK"); + return; + } + + /* Check if caller can handle a buffer this large, if not, adjust. */ + if (bufsiz > *maxsiz) + bufsiz = *maxsiz; + + /* See if buffer can hold the query (usually it can, as the query is + short). */ + if (strlen (arg) >= bufsiz) + error ("kod: query argument too long"); + + /* Send actual request. */ + if (target_query ((int) 'K', arg, result, &bufsiz)) + strcpy (result, "ERR: remote query failed"); +} + +/* Print name of kod command after selecting the appropriate kod + formatting library module. As a side effect we create a new "info" + subcommand which is what the user actually uses to query the OS. */ + +static void +kod_set_os (char *arg, int from_tty, struct cmd_list_element *command) +{ + char *p; + + if (command->type != set_cmd) + return; + + /* If we had already had an open OS, close it. */ + if (gdb_kod_close) + (*gdb_kod_close) (); + + /* Also remove the old OS's command. */ + if (old_operating_system) + { + delete_cmd (old_operating_system, &infolist); + free (old_operating_system); + } + old_operating_system = strdup (operating_system); + + if (! operating_system || ! *operating_system) + { + /* If user set operating system to empty, we want to forget we + had a module open. Setting these variables is just nice for + debugging and clarity. */ + gdb_kod_open = NULL; + gdb_kod_request = NULL; + gdb_kod_close = NULL; + } + else + { + char *kodlib; + + load_kod_library (operating_system); + + kodlib = (*gdb_kod_open) (gdb_kod_display, gdb_kod_query); + + /* Add kod related info commands to gdb. */ + add_info (operating_system, info_kod_command, + "Displays information about Kernel Objects."); + + p = strrchr (kodlib, '-'); + if (p != NULL) + p++; + else + p = "Unknown KOD library"; + printf_filtered ("%s - %s\n", operating_system, p); + + free (kodlib); + } +} + +/* Print information about currently known kernel objects of the + specified type or a list of all known kernel object types if + argument is empty. */ + +static void +info_kod_command (char *arg, int from_tty) +{ + (*gdb_kod_request) (arg, from_tty); +} + +/* Print name of kod command after selecting the appropriate kod + formatting library module. */ + +static void +load_kod_library (char *lib) +{ +#if 0 + /* FIXME: Don't have the eCos code here. */ + if (! strcmp (lib, "ecos")) + { + gdb_kod_open = ecos_kod_open; + gdb_kod_request = ecos_kod_request; + gdb_kod_close = ecos_kod_close; + } + else +#endif /* 0 */ + if (! strcmp (lib, "cisco")) + { + gdb_kod_open = cisco_kod_open; + gdb_kod_request = cisco_kod_request; + gdb_kod_close = cisco_kod_close; + } + else + error ("Unknown operating system: %s\n", operating_system); +} + +void +_initialize_kod () +{ + struct cmd_list_element *c; + + c = add_set_cmd ("os", no_class, var_string, + (char *) &operating_system, + "Set operating system", + &setlist); + c->function.sfunc = kod_set_os; + add_show_from_set (c, &showlist); +} |