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/* Copyright (c) 2024 Freya Murphy */
#ifndef __ASM_H__
#define __ASM_H__
#include <elf.h>
#include "gen.h"
///
/// ELF string table
///
struct elf_str_table {
// size of the ptr in bytes
size_t size;
// pointer that contains
// the strings
char *ptr;
};
/* initalize a string table */
int strtab_init(struct elf_str_table *strtab);
/* free a string table */
void strtab_free(struct elf_str_table *strtab);
/* get a string form the string table */
int strtab_get_str(struct elf_str_table *strtab, const char *str, size_t *res);
/* get or append a string into the string table */
int strtab_write_str(struct elf_str_table *strtab, const char *str, size_t *res);
///
/// elf section
///
/* holds a section of the asm file (i.e. .text, .bss, .data) */
struct elf_section {
// section data *weak* pointer
struct section *data;
// index of the section in
// the ELF shdr
size_t shdr_idx;
// relocation table
size_t reltab_shidx;
uint32_t reltab_len;
Elf32_Rel *reltab;
};
///
/// assembler
///
struct assembler {
// the code generator
struct generator gen;
/// symbol table
size_t symtab_shidx;
size_t symtab_len;
Elf32_Sym *symbols;
// sh string table
size_t strtab_shidx;
struct elf_str_table strtab;
// string table
size_t shstrtab_shidx;
struct elf_str_table shstrtab;
/// sections
uint32_t section_len;
struct elf_section *sections;
/// section header
Elf32_Shdr *shdr;
uint32_t shdr_len;
};
/* defines arguments to the assembler */
struct assembler_arguments {
char *in_file;
char *out_file;
};
/* initalize the assembler */
int assembler_init(struct assembler *assembler, const char *path);
/* free the assembler */
void assembler_free(struct assembler *assembler);
/* assemble a file */
int assemble_file(struct assembler_arguments args);
#endif /* __ASM_H__ */
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