98 lines
1.8 KiB
C
98 lines
1.8 KiB
C
/* Copyright (c) 2024 Freya Murphy */
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#ifndef __TAB_H__
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#define __TAB_H__
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#include <stdint.h>
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#include <stddef.h>
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#include "lex.h"
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///
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/// Symbol table
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///
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#define SYM_SEC_STUB (UINT32_MAX)
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enum symbol_type {
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SYM_LOCAL,
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SYM_GLOBAL,
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SYM_EXTERN,
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};
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struct symbol {
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// the offset of the symbol in a section
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uint32_t offset;
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// the index of section the symbol is in
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uint32_t secidx;
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// index into this table
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uint32_t tabidx;
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// the name of the symbol
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struct string name;
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// type
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enum symbol_type type;
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};
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struct symbol_table {
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// length in size in sym ammt
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size_t len;
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size_t size;
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// symbols
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struct symbol *symbols;
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};
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/* initalize a symbol table */
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int symtab_init(struct symbol_table *symtab);
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/* free the symbol table */
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void symtab_free(struct symbol_table *symtab);
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/* add a symbol to the symbol tbl */
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int symtab_push(struct symbol_table *symtab, struct symbol *sym);
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/* find a symbol by name in the symbol table */
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int symtab_find(struct symbol_table *symtab, struct symbol **sym,
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const char *name);
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/* find an existing symbol with a name or stub a temp one */
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int symtab_find_or_stub(struct symbol_table *symtab, struct symbol **sym,
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const struct string *const name);
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///
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/// Reference table
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///
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enum reference_type {
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REF_NONE,
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REF_MIPS_16,
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REF_MIPS_26,
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REF_MIPS_PC16,
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REF_MIPS_LO16,
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REF_MIPS_HI16,
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};
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struct reference {
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enum reference_type type;
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struct symbol *symbol;
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uint32_t offset;
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};
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struct reference_table {
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// size
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size_t len;
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size_t size;
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// references
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struct reference *references;
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};
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/* initalize a reference table */
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int reftab_init(struct reference_table *reftab);
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/* free the reference table */
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void reftab_free(struct reference_table *reftab);
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/* add a reference to the reference tbl */
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int reftab_push(struct reference_table *reftab, struct reference *ref);
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#endif /* __TAB_H__ */
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