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-rw-r--r--src/sys/include/np/symbol.h107
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diff --git a/src/sys/include/np/symbol.h b/src/sys/include/np/symbol.h
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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
+ * @link: Queue link
+ */
+struct symbol {
+ char *name;
+ void *addr;
+ 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);
+#endif /* !_NP_SYMBOL_H_ */