WebSVN – HelenOS-historic – Diff – /kernel/trunk/generic/src/console/kconsole.c


/*
 * Copyright (C) 2005 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#include <console/kconsole.h>
#include <console/console.h>
#include <console/chardev.h>
#include <print.h>
#include <panic.h>
#include <typedefs.h>
#include <arch/types.h>
#include <list.h>
#include <arch.h>
#include <func.h>
#include <macros.h>
#include <debug.h>
#include <symtab.h>
 
#define MAX_CMDLINE 256
 
/** Simple kernel console.
 *
 * The console is realized by kernel thread kconsole.
 * It doesn't understand any useful command on its own,
 * but makes it possible for other kernel subsystems to
 * register their own commands.
 */
 
/** Locking.
 *
 * There is a list of cmd_info_t structures. This list
 * is protected by cmd_lock spinlock. Note that specially
 * the link elements of cmd_info_t are protected by
 * this lock.
 *
 * Each cmd_info_t also has its own lock, which protects
 * all elements thereof except the link element.
 *
 * cmd_lock must be acquired before any cmd_info lock.
 * When locking two cmd info structures, structure with
 * lower address must be locked first.
 */
 
spinlock_t cmd_lock;    /**< Lock protecting command list. */
link_t cmd_head;    /**< Command list. */
 
static cmd_info_t *parse_cmdline(char *cmdline, size_t len);
static bool parse_argument(char *cmdline, size_t len, index_t *start, index_t *end);
 
/** Data and methods for 'help' command. */
static int cmd_help(cmd_arg_t *argv);
static cmd_info_t help_info = {
    .name = "help",
    .description = "List of supported commands.",
    .func = cmd_help,
    .argc = 0
};
 
/** Data and methods for 'description' command. */
static int cmd_desc(cmd_arg_t *argv);
static void desc_help(void);
static char desc_buf[MAX_CMDLINE+1];
static cmd_arg_t desc_argv = {
    .type = ARG_TYPE_STRING,
    .buffer = desc_buf,
    .len = sizeof(desc_buf)
};
static cmd_info_t desc_info = {
    .name = "describe",
    .description = "Describe specified command.",
    .help = desc_help,
    .func = cmd_desc,
    .argc = 1,
    .argv = &desc_argv
};
 
/** Data and methods for 'symaddr' command. */
static int cmd_symaddr(cmd_arg_t *argv);
static char symaddr_buf[MAX_CMDLINE+1];
static cmd_arg_t symaddr_argv = {
    .type = ARG_TYPE_STRING,
    .buffer = symaddr_buf,
    .len = sizeof(symaddr_buf)
};
static cmd_info_t symaddr_info = {
    .name = "symaddr",
    .description = "Return symbol address.",
    .func = cmd_symaddr,
    .argc = 1,
    .argv = &symaddr_argv
};
 
/** Call0 - call function with no parameters */
static char call0_buf[MAX_CMDLINE+1];
static char carg1_buf[MAX_CMDLINE+1];
static char carg2_buf[MAX_CMDLINE+1];
 
static int cmd_call0(cmd_arg_t *argv);
static cmd_arg_t call0_argv = {
    .type = ARG_TYPE_STRING,
    .buffer = call0_buf,
    .len = sizeof(call0_buf)
};
static cmd_info_t call0_info = {
    .name = "call0",
    .description = "call0 <function> -> call function().",
    .func = cmd_call0,
    .argc = 1,
    .argv = &call0_argv
};
 
static int cmd_call1(cmd_arg_t *argv);
static cmd_arg_t call1_argv[] = {
    {
        .type = ARG_TYPE_STRING,
        .buffer = call0_buf,
        .len = sizeof(call0_buf)
    },
    {
        .type = ARG_TYPE_VAR,
        .buffer = carg1_buf,
        .len = sizeof(carg1_buf)
    }
};
static cmd_info_t call1_info = {
    .name = "call1",
    .description = "call1 <function> <arg1> -> call function(arg1).",
    .func = cmd_call1,
    .argc = 2,
    .argv = call1_argv
};
 
static int cmd_call2(cmd_arg_t *argv);
static cmd_arg_t call2_argv[] = {
    {
        .type = ARG_TYPE_STRING,
        .buffer = call0_buf,
        .len = sizeof(call0_buf)
    },
    {
        .type = ARG_TYPE_VAR,
        .buffer = carg1_buf,
        .len = sizeof(carg1_buf)
    },
    {
        .type = ARG_TYPE_VAR,
        .buffer = carg2_buf,
        .len = sizeof(carg2_buf)
    }
};
static cmd_info_t call2_info = {
    .name = "call2",
    .description = "call2 <function> <arg1> <arg2> -> call function(arg1,arg2).",
    .func = cmd_call2,
    .argc = 3,
    .argv = call2_argv
};
 
 
/** Data and methods for 'halt' command. */
static int cmd_halt(cmd_arg_t *argv);
static cmd_info_t halt_info = {
    .name = "halt",
    .description = "Halt the kernel.",
    .func = cmd_halt,
    .argc = 0
};
 
/** Initialize kconsole data structures. */
void kconsole_init(void)
{
    spinlock_initialize(&cmd_lock, "kconsole_cmd");
    list_initialize(&cmd_head);
   
    spinlock_initialize(&help_info.lock, "kconsole_help");
    link_initialize(&help_info.link);
    if (!cmd_register(&help_info))
        panic("could not register command %s\n", help_info.name);
 
 
    spinlock_initialize(&desc_info.lock, "kconsole_desc");
    link_initialize(&desc_info.link);
    if (!cmd_register(&desc_info))
        panic("could not register command %s\n", desc_info.name);
   
    spinlock_initialize(&symaddr_info.lock, "kconsole_symaddr");
    link_initialize(&symaddr_info.link);
    if (!cmd_register(&symaddr_info))
        panic("could not register command %s\n", symaddr_info.name);
 
    spinlock_initialize(&call0_info.lock, "kconsole_call0");
    link_initialize(&call0_info.link);
    if (!cmd_register(&call0_info))
        panic("could not register command %s\n", call0_info.name);
 
    spinlock_initialize(&call1_info.lock, "kconsole_call1");
    link_initialize(&call1_info.link);
    if (!cmd_register(&call1_info))
        panic("could not register command %s\n", call1_info.name);
 
 
    spinlock_initialize(&call2_info.lock, "kconsole_call2");
    link_initialize(&call2_info.link);
    if (!cmd_register(&call2_info))
        panic("could not register command %s\n", call2_info.name);
   
    spinlock_initialize(&halt_info.lock, "kconsole_halt");
    link_initialize(&halt_info.link);
    if (!cmd_register(&halt_info))
        panic("could not register command %s\n", halt_info.name);
}
 
 
/** Register kconsole command.
 *
 * @param cmd Structure describing the command.
 *
 * @return 0 on failure, 1 on success.
 */
int cmd_register(cmd_info_t *cmd)
{
    ipl_t ipl;
    link_t *cur;
   
    spinlock_lock(&cmd_lock);
   
    /*
     * Make sure the command is not already listed.
     */
    for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {
        cmd_info_t *hlp;
       
        hlp = list_get_instance(cur, cmd_info_t, link);
 
        if (hlp == cmd) {
            /* The command is already there. */
            spinlock_unlock(&cmd_lock);
            return 0;
        }
 
        /* Avoid deadlock. */
        if (hlp < cmd) {
            spinlock_lock(&hlp->lock);
            spinlock_lock(&cmd->lock);
        } else {
            spinlock_lock(&cmd->lock);
            spinlock_lock(&hlp->lock);
        }
       
        if ((strncmp(hlp->name, cmd->name, strlen(cmd->name)) == 0)) {
            /* The command is already there. */
            spinlock_unlock(&hlp->lock);
            spinlock_unlock(&cmd->lock);
            spinlock_unlock(&cmd_lock);
            return 0;
        }
       
        spinlock_unlock(&hlp->lock);
        spinlock_unlock(&cmd->lock);
    }
   
    /*
     * Now the command can be added.
     */
    list_append(&cmd->link, &cmd_head);
   
    spinlock_unlock(&cmd_lock);
    return 1;
}
 
/** Kernel console managing thread.
 *
 * @param arg Not used.
 */
void kconsole(void *arg)
{
    char cmdline[MAX_CMDLINE+1];
    cmd_info_t *cmd_info;
    count_t len;
 
    if (!stdin) {
        printf("%s: no stdin\n", __FUNCTION__);
        return;
    }
   
    while (true) {
        printf("%s> ", __FUNCTION__);
        if (!(len = gets(stdin, cmdline, sizeof(cmdline))))
            continue;
        cmdline[len] = '\0';
        cmd_info = parse_cmdline(cmdline, len);
        if (!cmd_info)
            continue;
        (void) cmd_info->func(cmd_info->argv);
    }
}
 
static int parse_int_arg(char *text, size_t len, __native *result)
{
    char symname[MAX_SYMBOL_NAME];
    __address symaddr;
    bool isaddr = false;
   
    /* If we get a name, try to find it in symbol table */
    if (text[0] < '0' | text[0] > '9') {
        if (text[0] == '&') {
            isaddr = true;
            text++;len--;
        }
        strncpy(symname, text, min(len+1, MAX_SYMBOL_NAME));
        symaddr = get_symbol_addr(symname);
        if (!symaddr) {
            printf("Symbol %s not found.\n",symname);
            return -1;
        }
        if (symaddr == (__address) -1) {
            printf("Duplicate symbol %s.\n",symname);
            symtab_print_search(symname);
            return -1;
        }
        if (isaddr)
            *result = (__native)symaddr;
        else
            *result = *((__native *)symaddr);
    } else /* It's a number - convert it */
        *result = atoi(text);
    return 0;
}
 
/** Parse command line.
 *
 * @param cmdline Command line as read from input device.
 * @param len Command line length.
 *
 * @return Structure describing the command.
 */
cmd_info_t *parse_cmdline(char *cmdline, size_t len)
{
    index_t start = 0, end = 0;
    cmd_info_t *cmd = NULL;
    link_t *cur;
    ipl_t ipl;
    int i;
   
    if (!parse_argument(cmdline, len, &start, &end)) {
        /* Command line did not contain alphanumeric word. */
        return NULL;
    }
 
    spinlock_lock(&cmd_lock);
   
    for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {
        cmd_info_t *hlp;
       
        hlp = list_get_instance(cur, cmd_info_t, link);
        spinlock_lock(&hlp->lock);
       
        if (strncmp(hlp->name, &cmdline[start], (end - start) + 1) == 0) {
            cmd = hlp;
            break;
        }
       
        spinlock_unlock(&hlp->lock);
    }
   
    spinlock_unlock(&cmd_lock);
   
    if (!cmd) {
        /* Unknown command. */
        printf("Unknown command.\n");
        return NULL;
    }
 
    /* cmd == hlp is locked */
   
    /*
     * The command line must be further analyzed and
     * the parameters therefrom must be matched and
     * converted to those specified in the cmd info
     * structure.
     */
 
    for (i = 0; i < cmd->argc; i++) {
        char *buf;
        start = end + 1;
        if (!parse_argument(cmdline, len, &start, &end)) {
            printf("Too few arguments.\n");
            spinlock_unlock(&cmd->lock);
            return NULL;
        }
       
        switch (cmd->argv[i].type) {
        case ARG_TYPE_STRING:
                buf = cmd->argv[i].buffer;
                strncpy(buf, (const char *) &cmdline[start], min((end - start) + 2, cmd->argv[i].len));
            buf[min((end - start) + 1, cmd->argv[i].len - 1)] = '\0';
            break;
        case ARG_TYPE_INT:
 
 
 
 
            if (parse_int_arg(cmdline+start, end-start+1,
 
 
 
 
 
 
                      &cmd->argv[i].intval))
 
 
                return NULL;
 
 
 
 
            break;
        case ARG_TYPE_VAR:
            if (start != end && cmdline[start] == '"' && cmdline[end] == '"') {
                buf = cmd->argv[i].buffer;
                strncpy(buf, (const char *) &cmdline[start+1],
                    min((end-start), cmd->argv[i].len));
                buf[min((end - start), cmd->argv[i].len - 1)] = '\0';
                cmd->argv[i].intval = (__native) buf;
                cmd->argv[i].vartype = ARG_TYPE_STRING;
            } else if (!parse_int_arg(cmdline+start, end-start+1,
                         &cmd->argv[i].intval))
                cmd->argv[i].vartype = ARG_TYPE_INT;
            else {
                printf("Unrecognized variable argument.\n");
                return NULL;
            }
            break;
        case ARG_TYPE_INVALID:
        default:
            printf("invalid argument type\n");
            return NULL;
            break;
        }
    }
   
    start = end + 1;
    if (parse_argument(cmdline, len, &start, &end)) {
        printf("Too many arguments.\n");
        spinlock_unlock(&cmd->lock);
        return NULL;
    }
   
    spinlock_unlock(&cmd->lock);
    return cmd;
}
 
/** Parse argument.
 *
 * Find start and end positions of command line argument.
 *
 * @param cmdline Command line as read from the input device.
 * @param len Number of characters in cmdline.
 * @param start On entry, 'start' contains pointer to the index
 *        of first unprocessed character of cmdline.
 *        On successful exit, it marks beginning of the next argument.
 * @param end Undefined on entry. On exit, 'end' points to the last character
 *        of the next argument.
 *
 * @return false on failure, true on success.
 */
bool parse_argument(char *cmdline, size_t len, index_t *start, index_t *end)
{
    int i;
    bool found_start = false;
   
    ASSERT(start != NULL);
    ASSERT(end != NULL);
   
    for (i = *start; i < len; i++) {
        if (!found_start) {
            if (is_white(cmdline[i]))
                (*start)++;
            else
                found_start = true;
        } else {
            if (is_white(cmdline[i]))
                break;
        }
    }
    *end = i - 1;
 
    return found_start;
}
 
 
/** List supported commands.
 *
 * @param argv Argument vector.
 *
 * @return 0 on failure, 1 on success.
 */
int cmd_help(cmd_arg_t *argv)
{
    link_t *cur;
    ipl_t ipl;
 
    spinlock_lock(&cmd_lock);
   
    for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {
        cmd_info_t *hlp;
       
        hlp = list_get_instance(cur, cmd_info_t, link);
        spinlock_lock(&hlp->lock);
       
        printf("%s - %s\n", hlp->name, hlp->description);
 
        spinlock_unlock(&hlp->lock);
    }
   
    spinlock_unlock(&cmd_lock);
 
    return 1;
}
 
/** Describe specified command.
 *
 * @param argv Argument vector.
 *
 * @return 0 on failure, 1 on success.
 */
int cmd_desc(cmd_arg_t *argv)
{
    link_t *cur;
    ipl_t ipl;
 
    spinlock_lock(&cmd_lock);
   
    for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {
        cmd_info_t *hlp;
       
        hlp = list_get_instance(cur, cmd_info_t, link);
        spinlock_lock(&hlp->lock);
 
        if (strncmp(hlp->name, (const char *) argv->buffer, strlen(hlp->name)) == 0) {
            printf("%s - %s\n", hlp->name, hlp->description);
            if (hlp->help)
                hlp->help();
            spinlock_unlock(&hlp->lock);
            break;
        }
 
        spinlock_unlock(&hlp->lock);
    }
   
    spinlock_unlock(&cmd_lock);
 
    return 1;
}
 
/** Search symbol table */
int cmd_symaddr(cmd_arg_t *argv)
{
    __address symaddr;
    char *symbol;
 
    symtab_print_search(argv->buffer);
   
    return 1;
}
 
/** Call function with zero parameters */
int cmd_call0(cmd_arg_t *argv)
{
    __address symaddr;
    char *symbol;
    __native (*f)(void);
 
    symaddr = get_symbol_addr(argv->buffer);
    if (!symaddr)
        printf("Symbol %s not found.\n", argv->buffer);
    else if (symaddr == (__address) -1) {
        symtab_print_search(argv->buffer);
        printf("Duplicate symbol, be more specific.\n");
    } else {
        symbol = get_symtab_entry(symaddr);
        printf("Calling f(): 0x%p: %s\n", symaddr, symbol);
        f =  (__native (*)(void)) symaddr;
        printf("Result: 0x%X\n", f());
    }
   
    return 1;
}
 
/** Call function with one parameter */
int cmd_call1(cmd_arg_t *argv)
{
    __address symaddr;
    char *symbol;
    __native (*f)(__native);
    __native arg1 = argv[1].intval;
 
    symaddr = get_symbol_addr(argv->buffer);
    if (!symaddr)
        printf("Symbol %s not found.\n", argv->buffer);
    else if (symaddr == (__address) -1) {
        symtab_print_search(argv->buffer);
        printf("Duplicate symbol, be more specific.\n");
    } else {
        symbol = get_symtab_entry(symaddr);
        printf("Calling f(0x%x): 0x%p: %s\n", arg1, symaddr, symbol);
        f =  (__native (*)(__native)) symaddr;
        printf("Result: 0x%x\n", f(arg1));
    }
   
    return 1;
}
 
/** Call function with two parameters */
int cmd_call2(cmd_arg_t *argv)
{
    __address symaddr;
    char *symbol;
    __native (*f)(__native,__native);
    __native arg1 = argv[1].intval;
    __native arg2 = argv[2].intval;
 
    symaddr = get_symbol_addr(argv->buffer);
    if (!symaddr)
        printf("Symbol %s not found.\n", argv->buffer);
    else if (symaddr == (__address) -1) {
        symtab_print_search(argv->buffer);
        printf("Duplicate symbol, be more specific.\n");
    } else {
        symbol = get_symtab_entry(symaddr);
        printf("Calling f(0x%x,0x%x): 0x%p: %s\n",
               arg1, arg2, symaddr, symbol);
        f =  (__native (*)(__native,__native)) symaddr;
        printf("Result: 0x%x\n", f(arg1, arg2));
    }
   
    return 1;
}
 
 
/** Print detailed description of 'describe' command. */
void desc_help(void)
{
    printf("Syntax: describe command_name\n");
}
 
/** Halt the kernel.
 *
 * @param argv Argument vector (ignored).
 *
 * @return 0 on failure, 1 on success (never returns).
 */
int cmd_halt(cmd_arg_t *argv)
{
    halt();
    return 1;
}
 

Rev 582	Rev 585
1	/*	1	/*
2	* Copyright (C) 2005 Jakub Jermar	2	* Copyright (C) 2005 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	#include <console/kconsole.h>	29	#include <console/kconsole.h>
30	#include <console/console.h>	30	#include <console/console.h>
31	#include <console/chardev.h>	31	#include <console/chardev.h>
32	#include <print.h>	32	#include <print.h>
33	#include <panic.h>	33	#include <panic.h>
34	#include <typedefs.h>	34	#include <typedefs.h>
35	#include <arch/types.h>	35	#include <arch/types.h>
36	#include <list.h>	36	#include <list.h>
37	#include <arch.h>	37	#include <arch.h>
38	#include <func.h>	38	#include <func.h>
39	#include <macros.h>	39	#include <macros.h>
40	#include <debug.h>	40	#include <debug.h>
41	#include <symtab.h>	41	#include <symtab.h>
42		42
43	#define MAX_CMDLINE 256	43	#define MAX_CMDLINE 256
44		44
45	/** Simple kernel console.	45	/** Simple kernel console.
46	*	46	*
47	* The console is realized by kernel thread kconsole.	47	* The console is realized by kernel thread kconsole.
48	* It doesn't understand any useful command on its own,	48	* It doesn't understand any useful command on its own,
49	* but makes it possible for other kernel subsystems to	49	* but makes it possible for other kernel subsystems to
50	* register their own commands.	50	* register their own commands.
51	*/	51	*/
52		52
53	/** Locking.	53	/** Locking.
54	*	54	*
55	* There is a list of cmd_info_t structures. This list	55	* There is a list of cmd_info_t structures. This list
56	* is protected by cmd_lock spinlock. Note that specially	56	* is protected by cmd_lock spinlock. Note that specially
57	* the link elements of cmd_info_t are protected by	57	* the link elements of cmd_info_t are protected by
58	* this lock.	58	* this lock.
59	*	59	*
60	* Each cmd_info_t also has its own lock, which protects	60	* Each cmd_info_t also has its own lock, which protects
61	* all elements thereof except the link element.	61	* all elements thereof except the link element.
62	*	62	*
63	* cmd_lock must be acquired before any cmd_info lock.	63	* cmd_lock must be acquired before any cmd_info lock.
64	* When locking two cmd info structures, structure with	64	* When locking two cmd info structures, structure with
65	* lower address must be locked first.	65	* lower address must be locked first.
66	*/	66	*/
67		67
68	spinlock_t cmd_lock; /*< Lock protecting command list. /	68	spinlock_t cmd_lock; /*< Lock protecting command list. /
69	link_t cmd_head; /*< Command list. /	69	link_t cmd_head; /*< Command list. /
70		70
71	static cmd_info_t parse_cmdline(char cmdline, size_t len);	71	static cmd_info_t parse_cmdline(char cmdline, size_t len);
72	static bool parse_argument(char cmdline, size_t len, index_t start, index_t *end);	72	static bool parse_argument(char cmdline, size_t len, index_t start, index_t *end);
73		73
74	/** Data and methods for 'help' command. */	74	/** Data and methods for 'help' command. */
75	static int cmd_help(cmd_arg_t *argv);	75	static int cmd_help(cmd_arg_t *argv);
76	static cmd_info_t help_info = {	76	static cmd_info_t help_info = {
77	.name = "help",	77	.name = "help",
78	.description = "List of supported commands.",	78	.description = "List of supported commands.",
79	.func = cmd_help,	79	.func = cmd_help,
80	.argc = 0	80	.argc = 0
81	};	81	};
82		82
83	/** Data and methods for 'description' command. */	83	/** Data and methods for 'description' command. */
84	static int cmd_desc(cmd_arg_t *argv);	84	static int cmd_desc(cmd_arg_t *argv);
85	static void desc_help(void);	85	static void desc_help(void);
86	static char desc_buf[MAX_CMDLINE+1];	86	static char desc_buf[MAX_CMDLINE+1];
87	static cmd_arg_t desc_argv = {	87	static cmd_arg_t desc_argv = {
88	.type = ARG_TYPE_STRING,	88	.type = ARG_TYPE_STRING,
89	.buffer = desc_buf,	89	.buffer = desc_buf,
90	.len = sizeof(desc_buf)	90	.len = sizeof(desc_buf)
91	};	91	};
92	static cmd_info_t desc_info = {	92	static cmd_info_t desc_info = {
93	.name = "describe",	93	.name = "describe",
94	.description = "Describe specified command.",	94	.description = "Describe specified command.",
95	.help = desc_help,	95	.help = desc_help,
96	.func = cmd_desc,	96	.func = cmd_desc,
97	.argc = 1,	97	.argc = 1,
98	.argv = &desc_argv	98	.argv = &desc_argv
99	};	99	};
100		100
101	/** Data and methods for 'symaddr' command. */	101	/** Data and methods for 'symaddr' command. */
102	static int cmd_symaddr(cmd_arg_t *argv);	102	static int cmd_symaddr(cmd_arg_t *argv);
103	static char symaddr_buf[MAX_CMDLINE+1];	103	static char symaddr_buf[MAX_CMDLINE+1];
104	static cmd_arg_t symaddr_argv = {	104	static cmd_arg_t symaddr_argv = {
105	.type = ARG_TYPE_STRING,	105	.type = ARG_TYPE_STRING,
106	.buffer = symaddr_buf,	106	.buffer = symaddr_buf,
107	.len = sizeof(symaddr_buf)	107	.len = sizeof(symaddr_buf)
108	};	108	};
109	static cmd_info_t symaddr_info = {	109	static cmd_info_t symaddr_info = {
110	.name = "symaddr",	110	.name = "symaddr",
111	.description = "Return symbol address.",	111	.description = "Return symbol address.",
112	.func = cmd_symaddr,	112	.func = cmd_symaddr,
113	.argc = 1,	113	.argc = 1,
114	.argv = &symaddr_argv	114	.argv = &symaddr_argv
115	};	115	};
116		116
117	/** Call0 - call function with no parameters */	117	/** Call0 - call function with no parameters */
118	static char call0_buf[MAX_CMDLINE+1];	118	static char call0_buf[MAX_CMDLINE+1];
-		119	static char carg1_buf[MAX_CMDLINE+1];
-		120	static char carg2_buf[MAX_CMDLINE+1];
119		121
120	static int cmd_call0(cmd_arg_t *argv);	122	static int cmd_call0(cmd_arg_t *argv);
121	static cmd_arg_t call0_argv = {	123	static cmd_arg_t call0_argv = {
122	.type = ARG_TYPE_STRING,	124	.type = ARG_TYPE_STRING,
123	.buffer = call0_buf,	125	.buffer = call0_buf,
124	.len = sizeof(call0_buf)	126	.len = sizeof(call0_buf)
125	};	127	};
126	static cmd_info_t call0_info = {	128	static cmd_info_t call0_info = {
127	.name = "call0",	129	.name = "call0",
128	.description = "call0 <function> -> call function().",	130	.description = "call0 <function> -> call function().",
129	.func = cmd_call0,	131	.func = cmd_call0,
130	.argc = 1,	132	.argc = 1,
131	.argv = &call0_argv	133	.argv = &call0_argv
132	};	134	};
133		135
134	static int cmd_call1(cmd_arg_t *argv);	136	static int cmd_call1(cmd_arg_t *argv);
135	static cmd_arg_t call1_argv[] = {	137	static cmd_arg_t call1_argv[] = {
136	{	138	{
137	.type = ARG_TYPE_STRING,	139	.type = ARG_TYPE_STRING,
138	.buffer = call0_buf,	140	.buffer = call0_buf,
139	.len = sizeof(call0_buf)	141	.len = sizeof(call0_buf)
140	},	142	},
-		143	{
141	{ .type = ARG_TYPE_INT }	144	.type = ARG_TYPE_VAR,
-		145	.buffer = carg1_buf,
-		146	.len = sizeof(carg1_buf)
-		147	}
142	};	148	};
143	static cmd_info_t call1_info = {	149	static cmd_info_t call1_info = {
144	.name = "call1",	150	.name = "call1",
145	.description = "call1 <function> <arg1> -> call function(arg1).",	151	.description = "call1 <function> <arg1> -> call function(arg1).",
146	.func = cmd_call1,	152	.func = cmd_call1,
147	.argc = 2,	153	.argc = 2,
148	.argv = call1_argv	154	.argv = call1_argv
149	};	155	};
150		156
151	static int cmd_call2(cmd_arg_t *argv);	157	static int cmd_call2(cmd_arg_t *argv);
152	static cmd_arg_t call2_argv[] = {	158	static cmd_arg_t call2_argv[] = {
153	{	159	{
154	.type = ARG_TYPE_STRING,	160	.type = ARG_TYPE_STRING,
155	.buffer = call0_buf,	161	.buffer = call0_buf,
156	.len = sizeof(call0_buf)	162	.len = sizeof(call0_buf)
157	},	163	},
-		164	{
158	{ .type = ARG_TYPE_INT },	165	.type = ARG_TYPE_VAR,
-		166	.buffer = carg1_buf,
-		167	.len = sizeof(carg1_buf)
-		168	},
-		169	{
159	{ .type = ARG_TYPE_INT }	170	.type = ARG_TYPE_VAR,
-		171	.buffer = carg2_buf,
-		172	.len = sizeof(carg2_buf)
-		173	}
160	};	174	};
161	static cmd_info_t call2_info = {	175	static cmd_info_t call2_info = {
162	.name = "call2",	176	.name = "call2",
163	.description = "call2 <function> <arg1> <arg2> -> call function(arg1,arg2).",	177	.description = "call2 <function> <arg1> <arg2> -> call function(arg1,arg2).",
164	.func = cmd_call2,	178	.func = cmd_call2,
165	.argc = 3,	179	.argc = 3,
166	.argv = call2_argv	180	.argv = call2_argv
167	};	181	};
168		182
169		183
170	/** Data and methods for 'halt' command. */	184	/** Data and methods for 'halt' command. */
171	static int cmd_halt(cmd_arg_t *argv);	185	static int cmd_halt(cmd_arg_t *argv);
172	static cmd_info_t halt_info = {	186	static cmd_info_t halt_info = {
173	.name = "halt",	187	.name = "halt",
174	.description = "Halt the kernel.",	188	.description = "Halt the kernel.",
175	.func = cmd_halt,	189	.func = cmd_halt,
176	.argc = 0	190	.argc = 0
177	};	191	};
178		192
179	/** Initialize kconsole data structures. */	193	/** Initialize kconsole data structures. */
180	void kconsole_init(void)	194	void kconsole_init(void)
181	{	195	{
182	spinlock_initialize(&cmd_lock, "kconsole_cmd");	196	spinlock_initialize(&cmd_lock, "kconsole_cmd");
183	list_initialize(&cmd_head);	197	list_initialize(&cmd_head);
184		198
185	spinlock_initialize(&help_info.lock, "kconsole_help");	199	spinlock_initialize(&help_info.lock, "kconsole_help");
186	link_initialize(&help_info.link);	200	link_initialize(&help_info.link);
187	if (!cmd_register(&help_info))	201	if (!cmd_register(&help_info))
188	panic("could not register command %s\n", help_info.name);	202	panic("could not register command %s\n", help_info.name);
189		203
190		204
191	spinlock_initialize(&desc_info.lock, "kconsole_desc");	205	spinlock_initialize(&desc_info.lock, "kconsole_desc");
192	link_initialize(&desc_info.link);	206	link_initialize(&desc_info.link);
193	if (!cmd_register(&desc_info))	207	if (!cmd_register(&desc_info))
194	panic("could not register command %s\n", desc_info.name);	208	panic("could not register command %s\n", desc_info.name);
195		209
196	spinlock_initialize(&symaddr_info.lock, "kconsole_symaddr");	210	spinlock_initialize(&symaddr_info.lock, "kconsole_symaddr");
197	link_initialize(&symaddr_info.link);	211	link_initialize(&symaddr_info.link);
198	if (!cmd_register(&symaddr_info))	212	if (!cmd_register(&symaddr_info))
199	panic("could not register command %s\n", symaddr_info.name);	213	panic("could not register command %s\n", symaddr_info.name);
200		214
201	spinlock_initialize(&call0_info.lock, "kconsole_call0");	215	spinlock_initialize(&call0_info.lock, "kconsole_call0");
202	link_initialize(&call0_info.link);	216	link_initialize(&call0_info.link);
203	if (!cmd_register(&call0_info))	217	if (!cmd_register(&call0_info))
204	panic("could not register command %s\n", call0_info.name);	218	panic("could not register command %s\n", call0_info.name);
205		219
206	spinlock_initialize(&call1_info.lock, "kconsole_call1");	220	spinlock_initialize(&call1_info.lock, "kconsole_call1");
207	link_initialize(&call1_info.link);	221	link_initialize(&call1_info.link);
208	if (!cmd_register(&call1_info))	222	if (!cmd_register(&call1_info))
209	panic("could not register command %s\n", call1_info.name);	223	panic("could not register command %s\n", call1_info.name);
210		224
211		225
212	spinlock_initialize(&call2_info.lock, "kconsole_call2");	226	spinlock_initialize(&call2_info.lock, "kconsole_call2");
213	link_initialize(&call2_info.link);	227	link_initialize(&call2_info.link);
214	if (!cmd_register(&call2_info))	228	if (!cmd_register(&call2_info))
215	panic("could not register command %s\n", call2_info.name);	229	panic("could not register command %s\n", call2_info.name);
216		230
217	spinlock_initialize(&halt_info.lock, "kconsole_halt");	231	spinlock_initialize(&halt_info.lock, "kconsole_halt");
218	link_initialize(&halt_info.link);	232	link_initialize(&halt_info.link);
219	if (!cmd_register(&halt_info))	233	if (!cmd_register(&halt_info))
220	panic("could not register command %s\n", halt_info.name);	234	panic("could not register command %s\n", halt_info.name);
221	}	235	}
222		236
223		237
224	/** Register kconsole command.	238	/** Register kconsole command.
225	*	239	*
226	* @param cmd Structure describing the command.	240	* @param cmd Structure describing the command.
227	*	241	*
228	* @return 0 on failure, 1 on success.	242	* @return 0 on failure, 1 on success.
229	*/	243	*/
230	int cmd_register(cmd_info_t *cmd)	244	int cmd_register(cmd_info_t *cmd)
231	{	245	{
232	ipl_t ipl;	246	ipl_t ipl;
233	link_t *cur;	247	link_t *cur;
234		248
235	spinlock_lock(&cmd_lock);	249	spinlock_lock(&cmd_lock);
236		250
237	/*	251	/*
238	* Make sure the command is not already listed.	252	* Make sure the command is not already listed.
239	*/	253	*/
240	for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {	254	for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {
241	cmd_info_t *hlp;	255	cmd_info_t *hlp;
242		256
243	hlp = list_get_instance(cur, cmd_info_t, link);	257	hlp = list_get_instance(cur, cmd_info_t, link);
244		258
245	if (hlp == cmd) {	259	if (hlp == cmd) {
246	/* The command is already there. */	260	/* The command is already there. */
247	spinlock_unlock(&cmd_lock);	261	spinlock_unlock(&cmd_lock);
248	return 0;	262	return 0;
249	}	263	}
250		264
251	/* Avoid deadlock. */	265	/* Avoid deadlock. */
252	if (hlp < cmd) {	266	if (hlp < cmd) {
253	spinlock_lock(&hlp->lock);	267	spinlock_lock(&hlp->lock);
254	spinlock_lock(&cmd->lock);	268	spinlock_lock(&cmd->lock);
255	} else {	269	} else {
256	spinlock_lock(&cmd->lock);	270	spinlock_lock(&cmd->lock);
257	spinlock_lock(&hlp->lock);	271	spinlock_lock(&hlp->lock);
258	}	272	}
259		273
260	if ((strncmp(hlp->name, cmd->name, strlen(cmd->name)) == 0)) {	274	if ((strncmp(hlp->name, cmd->name, strlen(cmd->name)) == 0)) {
261	/* The command is already there. */	275	/* The command is already there. */
262	spinlock_unlock(&hlp->lock);	276	spinlock_unlock(&hlp->lock);
263	spinlock_unlock(&cmd->lock);	277	spinlock_unlock(&cmd->lock);
264	spinlock_unlock(&cmd_lock);	278	spinlock_unlock(&cmd_lock);
265	return 0;	279	return 0;
266	}	280	}
267		281
268	spinlock_unlock(&hlp->lock);	282	spinlock_unlock(&hlp->lock);
269	spinlock_unlock(&cmd->lock);	283	spinlock_unlock(&cmd->lock);
270	}	284	}
271		285
272	/*	286	/*
273	* Now the command can be added.	287	* Now the command can be added.
274	*/	288	*/
275	list_append(&cmd->link, &cmd_head);	289	list_append(&cmd->link, &cmd_head);
276		290
277	spinlock_unlock(&cmd_lock);	291	spinlock_unlock(&cmd_lock);
278	return 1;	292	return 1;
279	}	293	}
280		294
281	/** Kernel console managing thread.	295	/** Kernel console managing thread.
282	*	296	*
283	* @param arg Not used.	297	* @param arg Not used.
284	*/	298	*/
285	void kconsole(void *arg)	299	void kconsole(void *arg)
286	{	300	{
287	char cmdline[MAX_CMDLINE+1];	301	char cmdline[MAX_CMDLINE+1];
288	cmd_info_t *cmd_info;	302	cmd_info_t *cmd_info;
289	count_t len;	303	count_t len;
290		304
291	if (!stdin) {	305	if (!stdin) {
292	printf("%s: no stdin\n", __FUNCTION__);	306	printf("%s: no stdin\n", __FUNCTION__);
293	return;	307	return;
294	}	308	}
295		309
296	while (true) {	310	while (true) {
297	printf("%s> ", __FUNCTION__);	311	printf("%s> ", __FUNCTION__);
298	if (!(len = gets(stdin, cmdline, sizeof(cmdline))))	312	if (!(len = gets(stdin, cmdline, sizeof(cmdline))))
299	continue;	313	continue;
300	cmdline[len] = '\0';	314	cmdline[len] = '\0';
301	cmd_info = parse_cmdline(cmdline, len);	315	cmd_info = parse_cmdline(cmdline, len);
302	if (!cmd_info)	316	if (!cmd_info)
303	continue;	317	continue;
304	(void) cmd_info->func(cmd_info->argv);	318	(void) cmd_info->func(cmd_info->argv);
305	}	319	}
306	}	320	}
307		321
-		322	static int parse_int_arg(char text, size_t len, __native result)
-		323	{
-		324	char symname[MAX_SYMBOL_NAME];
-		325	__address symaddr;
-		326	bool isaddr = false;
-		327
-		328	/* If we get a name, try to find it in symbol table */
-		329	if (text[0] < '0' \| text[0] > '9') {
-		330	if (text[0] == '&') {
-		331	isaddr = true;
-		332	text++;len--;
-		333	}
-		334	strncpy(symname, text, min(len+1, MAX_SYMBOL_NAME));
-		335	symaddr = get_symbol_addr(symname);
-		336	if (!symaddr) {
-		337	printf("Symbol %s not found.\n",symname);
-		338	return -1;
-		339	}
-		340	if (symaddr == (__address) -1) {
-		341	printf("Duplicate symbol %s.\n",symname);
-		342	symtab_print_search(symname);
-		343	return -1;
-		344	}
-		345	if (isaddr)
-		346	*result = (__native)symaddr;
-		347	else
-		348	result = ((__native *)symaddr);
-		349	} else /* It's a number - convert it */
-		350	*result = atoi(text);
-		351	return 0;
-		352	}
-		353
308	/** Parse command line.	354	/** Parse command line.
309	*	355	*
310	* @param cmdline Command line as read from input device.	356	* @param cmdline Command line as read from input device.
311	* @param len Command line length.	357	* @param len Command line length.
312	*	358	*
313	* @return Structure describing the command.	359	* @return Structure describing the command.
314	*/	360	*/
315	cmd_info_t parse_cmdline(char cmdline, size_t len)	361	cmd_info_t parse_cmdline(char cmdline, size_t len)
316	{	362	{
317	index_t start = 0, end = 0;	363	index_t start = 0, end = 0;
318	cmd_info_t *cmd = NULL;	364	cmd_info_t *cmd = NULL;
319	link_t *cur;	365	link_t *cur;
320	ipl_t ipl;	366	ipl_t ipl;
321	int i;	367	int i;
322		368
323	if (!parse_argument(cmdline, len, &start, &end)) {	369	if (!parse_argument(cmdline, len, &start, &end)) {
324	/* Command line did not contain alphanumeric word. */	370	/* Command line did not contain alphanumeric word. */
325	return NULL;	371	return NULL;
326	}	372	}
327		373
328	spinlock_lock(&cmd_lock);	374	spinlock_lock(&cmd_lock);
329		375
330	for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {	376	for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {
331	cmd_info_t *hlp;	377	cmd_info_t *hlp;
332		378
333	hlp = list_get_instance(cur, cmd_info_t, link);	379	hlp = list_get_instance(cur, cmd_info_t, link);
334	spinlock_lock(&hlp->lock);	380	spinlock_lock(&hlp->lock);
335		381
336	if (strncmp(hlp->name, &cmdline[start], (end - start) + 1) == 0) {	382	if (strncmp(hlp->name, &cmdline[start], (end - start) + 1) == 0) {
337	cmd = hlp;	383	cmd = hlp;
338	break;	384	break;
339	}	385	}
340		386
341	spinlock_unlock(&hlp->lock);	387	spinlock_unlock(&hlp->lock);
342	}	388	}
343		389
344	spinlock_unlock(&cmd_lock);	390	spinlock_unlock(&cmd_lock);
345		391
346	if (!cmd) {	392	if (!cmd) {
347	/* Unknown command. */	393	/* Unknown command. */
348	printf("Unknown command.\n");	394	printf("Unknown command.\n");
349	return NULL;	395	return NULL;
350	}	396	}
351		397
352	/* cmd == hlp is locked */	398	/* cmd == hlp is locked */
353		399
354	/*	400	/*
355	* The command line must be further analyzed and	401	* The command line must be further analyzed and
356	* the parameters therefrom must be matched and	402	* the parameters therefrom must be matched and
357	* converted to those specified in the cmd info	403	* converted to those specified in the cmd info
358	* structure.	404	* structure.
359	*/	405	*/
360		406
361	for (i = 0; i < cmd->argc; i++) {	407	for (i = 0; i < cmd->argc; i++) {
362	char *buf;	408	char *buf;
363	start = end + 1;	409	start = end + 1;
364	if (!parse_argument(cmdline, len, &start, &end)) {	410	if (!parse_argument(cmdline, len, &start, &end)) {
365	printf("Too few arguments.\n");	411	printf("Too few arguments.\n");
366	spinlock_unlock(&cmd->lock);	412	spinlock_unlock(&cmd->lock);
367	return NULL;	413	return NULL;
368	}	414	}
369		415
370	switch (cmd->argv[i].type) {	416	switch (cmd->argv[i].type) {
371	case ARG_TYPE_STRING:	417	case ARG_TYPE_STRING:
372	buf = cmd->argv[i].buffer;	418	buf = cmd->argv[i].buffer;
373	strncpy(buf, (const char *) &cmdline[start], min((end - start) + 1, cmd->argv[i].len - 1));	419	strncpy(buf, (const char *) &cmdline[start], min((end - start) + 2, cmd->argv[i].len));
374	buf[min((end - start) + 1, cmd->argv[i].len - 1)] = '\0';	420	buf[min((end - start) + 1, cmd->argv[i].len - 1)] = '\0';
375	break;	421	break;
376	case ARG_TYPE_INT: {	422	case ARG_TYPE_INT:
377	char symname[MAX_SYMBOL_NAME];	-
378	__address symaddr;	-
379		-
380	/* If we get a name, try to find it in symbol table */	-
381	if (cmdline[start] < '0' \| cmdline[start] > '9') {	423	if (parse_int_arg(cmdline+start, end-start+1,
382	strncpy(symname, cmdline+start, min((end-start) + 1, MAX_SYMBOL_NAME -1 ));	-
383	symaddr = get_symbol_addr(symname);	-
384	if (!symaddr) {	-
385	printf("Symbol %s not found.\n",symname);	-
386	return NULL;	-
387	}	-
388	if (symaddr == (__address) -1) {	424	&cmd->argv[i].intval))
389	printf("Duplicate symbol %s.\n",symname);	-
390	symtab_print_search(symname);	-
391	return NULL;	425	return NULL;
392	}	-
393	cmd->argv[i].intval = ((__native )symaddr);	-
394	} else /* It's a number - convert it */	-
395	cmd->argv[i].intval = atoi(cmdline+start);	-
396	break;	426	break;
-		427	case ARG_TYPE_VAR:
-		428	if (start != end && cmdline[start] == '"' && cmdline[end] == '"') {
-		429	buf = cmd->argv[i].buffer;
-		430	strncpy(buf, (const char *) &cmdline[start+1],
-		431	min((end-start), cmd->argv[i].len));
-		432	buf[min((end - start), cmd->argv[i].len - 1)] = '\0';
-		433	cmd->argv[i].intval = (__native) buf;
-		434	cmd->argv[i].vartype = ARG_TYPE_STRING;
-		435	} else if (!parse_int_arg(cmdline+start, end-start+1,
-		436	&cmd->argv[i].intval))
-		437	cmd->argv[i].vartype = ARG_TYPE_INT;
-		438	else {
-		439	printf("Unrecognized variable argument.\n");
-		440	return NULL;
397	}	441	}
-		442	break;
398	case ARG_TYPE_INVALID:	443	case ARG_TYPE_INVALID:
399	default:	444	default:
400	printf("invalid argument type\n");	445	printf("invalid argument type\n");
401	return NULL;	446	return NULL;
402	break;	447	break;
403	}	448	}
404	}	449	}
405		450
406	start = end + 1;	451	start = end + 1;
407	if (parse_argument(cmdline, len, &start, &end)) {	452	if (parse_argument(cmdline, len, &start, &end)) {
408	printf("Too many arguments.\n");	453	printf("Too many arguments.\n");
409	spinlock_unlock(&cmd->lock);	454	spinlock_unlock(&cmd->lock);
410	return NULL;	455	return NULL;
411	}	456	}
412		457
413	spinlock_unlock(&cmd->lock);	458	spinlock_unlock(&cmd->lock);
414	return cmd;	459	return cmd;
415	}	460	}
416		461
417	/** Parse argument.	462	/** Parse argument.
418	*	463	*
419	* Find start and end positions of command line argument.	464	* Find start and end positions of command line argument.
420	*	465	*
421	* @param cmdline Command line as read from the input device.	466	* @param cmdline Command line as read from the input device.
422	* @param len Number of characters in cmdline.	467	* @param len Number of characters in cmdline.
423	* @param start On entry, 'start' contains pointer to the index	468	* @param start On entry, 'start' contains pointer to the index
424	* of first unprocessed character of cmdline.	469	* of first unprocessed character of cmdline.
425	* On successful exit, it marks beginning of the next argument.	470	* On successful exit, it marks beginning of the next argument.
426	* @param end Undefined on entry. On exit, 'end' points to the last character	471	* @param end Undefined on entry. On exit, 'end' points to the last character
427	* of the next argument.	472	* of the next argument.
428	*	473	*
429	* @return false on failure, true on success.	474	* @return false on failure, true on success.
430	*/	475	*/
431	bool parse_argument(char cmdline, size_t len, index_t start, index_t *end)	476	bool parse_argument(char cmdline, size_t len, index_t start, index_t *end)
432	{	477	{
433	int i;	478	int i;
434	bool found_start = false;	479	bool found_start = false;
435		480
436	ASSERT(start != NULL);	481	ASSERT(start != NULL);
437	ASSERT(end != NULL);	482	ASSERT(end != NULL);
438		483
439	for (i = *start; i < len; i++) {	484	for (i = *start; i < len; i++) {

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(root)/kernel/trunk/generic/src/console/kconsole.c @ 1780 – Rev 582 → 585