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/*
* Copyright (c) 2025 Ian Marco Moffett and L5 engineers
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of the project nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.
*/
#ifndef _NP_SYMBOL_H_
#define _NP_SYMBOL_H_ 1
#include <sys/types.h>
#include <sys/queue.h>
#include <os/np.h>
/* Number of symbol cache entries */
#define SYMCACHE_LEN 32
/*
* Represents a single symbol entry within
* a symbol table
*
* @name: Name of the symbol
* @addr: Data the symbol holds
* @id: Symbol ID
* @link: Queue link
*/
struct symbol {
char *name;
void *addr;
size_t id;
TAILQ_ENTRY(symbol) link;
};
/*
* Represents a symbol list
*
* @symq: Symbol queue
* @cache: Lookup cache
* @work: Work associated with this symbol list
* @nsym: Number of total symbols
* @cache_i: Cache index
*/
struct symlist {
TAILQ_HEAD(, symbol) symq;
struct symbol *cache[SYMCACHE_LEN];
struct np_work *work;
size_t nsym;
uint16_t cache_i;
};
/*
* Initialize a symbol list
*
* @work: Current work
* @symlist: Symbol list to initialize
*
* Returns zero on success, otherwise a less
* than zero value on failure.
*/
int symlist_init(struct np_work *work, struct symlist *symlist);
/*
* Allocate a new symbol that may be placed
* in a symbol list
*
* @slp: Symbol list pointer
* @name: Symbol name
* @addr: Symbol address
*
* Returns a pointer to the allocated symbol on success,
* otherwise returns a value of NULL on failure.
*/
struct symbol *symbol_alloc(struct symlist *slp, char *name, void *addr);
/*
* Lookup a specific symbol from a symbol
* table
*
* @slp: Symbol list pointer
* @name: Symbol name
* @res_p: Result pointer is written here
*
* Returns zero on success, otherwise a less than zero
* value on failure.
*/
int symbol_lookup(struct symlist *slp, char *name, struct symbol **res_p);
/*
* Lookup a specific symbol from a symbol
* table using its ID
*
* @slp: Symbol list pointer
* @name: Symbol name
* @res_p: Result pointer is written here
*
* Returns zero on success, otherwise a less than zero
* value on failure.
*/
int symbol_lookup_id(struct symlist *slp, size_t id, struct symbol **res_p);
#endif /* !_NP_SYMBOL_H_ */
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