(uxnasm) Updated
This commit is contained in:
Devine Lu Linvega
parent
b302645412
commit
5fdd442ec3
672
src/uxnasm.c
672
src/uxnasm.c
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@ -1,7 +1,7 @@
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#include <stdio.h>
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/*
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Copyright (c) 2021-2023 Devine Lu Linvega, Andrew Alderwick
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Copyright (c) 2021-2024 Devine Lu Linvega, Andrew Alderwick
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Permission to use, copy, modify, and distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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@ -11,43 +11,25 @@ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE.
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*/
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#define TRIM 0x0100
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#define LENGTH 0x10000
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/* clang-format off */
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#define PAGE 0x0100
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typedef unsigned char Uint8;
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typedef signed char Sint8;
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typedef unsigned short Uint16;
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typedef struct { char *name, rune, *content; Uint16 addr, refs; } Item;
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typedef struct { int line; char *path; } Context;
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typedef struct {
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char name[0x40], items[0x40][0x40];
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Uint8 len;
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} Macro;
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typedef struct {
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char name[0x40];
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Uint16 addr, refs;
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} Label;
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typedef struct {
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char name[0x40], rune;
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Uint16 addr;
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} Reference;
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typedef struct {
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Uint8 data[LENGTH];
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Uint8 lambda_stack[0x100], lambda_ptr, lambda_count;
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char scope[0x40], lambda[0x10], *location, *entry;
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unsigned int ptr, length;
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Uint16 label_len, macro_len, refs_len;
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Label labels[0x400];
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Macro macros[0x100];
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Reference refs[0x1000];
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} Program;
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Program p;
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/* clang-format off */
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static int ptr, length;
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static char token[0x40], scope[0x40], lambda[0x05];
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static char dict[0x4000], *dictnext = dict;
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static Uint8 data[0x10000], lambda_stack[0x100], lambda_ptr, lambda_len;
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static Uint16 labels_len, refs_len, macro_len;
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static Item labels[0x400], refs[0x1000], macros[0x100];
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static char *runes = "|$@&,_.-;=!?#\"%~";
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static char *hexad = "0123456789abcdef";
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static char ops[][4] = {
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"LIT", "INC", "POP", "NIP", "SWP", "ROT", "DUP", "OVR",
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"EQU", "NEQ", "GTH", "LTH", "JMP", "JCN", "JSR", "STH",
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@ -55,68 +37,47 @@ static char ops[][4] = {
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"ADD", "SUB", "MUL", "DIV", "AND", "ORA", "EOR", "SFT"
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};
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static char *runes = "|$@&,_.-;=!?#\"%~";
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static int find(char *s, char t) { int i = 0; char c; while((c = *s++)) { if(c == t) return i; i++; } return -1; } /* chr in str */
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static int shex(char *s) { int n = 0; char c; while((c = *s++)) { if(find(hexad, c) < 0) return -1; n = n << 4, n |= find(hexad, c); } return n; } /* str to hex */
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static int scmp(char *a, char *b, int len) { int i = 0; while(a[i] == b[i]) if(!a[i] || ++i >= len) return 1; return 0; } /* str compare */
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static char *scpy(char *src, char *dst, int len) { int i = 0; while((dst[i] = src[i]) && i < len - 2) i++; dst[i + 1] = '\0'; return dst; } /* str copy */
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static char *save(char *s, char c) { char *o = dictnext; while((*dictnext++ = *s++) && *s); *dictnext++ = c; return o; } /* save to dict */
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static char *join(char *a, char j, char *b) { char *res = dictnext; save(a, j), save(b, 0); return res; } /* join two str */
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static int scmp(char *a, char *b, int len) { int i = 0; while(a[i] == b[i]) if(!a[i] || ++i >= len) return 1; return 0; } /* string compare */
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static int sihx(char *s) { int i = 0; char c; while((c = s[i++])) if(!(c >= '0' && c <= '9') && !(c >= 'a' && c <= 'f')) return 0; return i > 1; } /* string is hexadecimal */
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static int shex(char *s) { int n = 0, i = 0; char c; while((c = s[i++])) if(c >= '0' && c <= '9') n = n * 16 + (c - '0'); else if(c >= 'a' && c <= 'f') n = n * 16 + 10 + (c - 'a'); return n; } /* string to num */
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static int slen(char *s) { int i = 0; while(s[i]) i++; return i; } /* string length */
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static int spos(char *s, char c) { Uint8 i = 0, j; while((j = s[i++])) if(j == c) return i; return -1; } /* character position */
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static char *scpy(char *src, char *dst, int len) { int i = 0; while((dst[i] = src[i]) && i < len - 2) i++; dst[i + 1] = '\0'; return dst; } /* string copy */
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static char *scat(char *dst, const char *src) { char *ptr = dst + slen(dst); while(*src) *ptr++ = *src++; *ptr = '\0'; return dst; } /* string cat */
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#define ishex(x) (shex(x) >= 0)
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#define isopc(x) (findopcode(x) || scmp(x, "BRK", 4))
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#define isinvalid(x) (!x[0] || ishex(x) || isopc(x) || find(runes, x[0]) >= 0)
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#define writeshort(x) (writebyte(x >> 8, ctx) && writebyte(x & 0xff, ctx))
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#define findlabel(x) finditem(x, labels, labels_len)
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#define findmacro(x) finditem(x, macros, macro_len)
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#define error_top(name, msg) !fprintf(stderr, "%s: %s\n", name, msg)
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#define error_asm(name) !fprintf(stderr, "%s: %s in @%s, %s:%d.\n", name, token, scope, ctx->path, ctx->line)
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/* clang-format on */
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static int parse(char *w, FILE *f);
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static int
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error_top(const char *name, const char *msg)
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{
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fprintf(stderr, "%s: %s\n", name, msg);
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return 0;
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}
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static int
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error_asm(const char *name, const char *msg)
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{
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fprintf(stderr, "%s: %s in @%s, %s:%d.\n", name, msg, p.scope, p.location, 123);
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return 0;
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}
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static int parse(char *w, FILE *f, Context *ctx);
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static char *
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setlocation(char *name)
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push(char *s, char c)
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{
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p.location = name;
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return name;
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}
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static char *
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sublabel(char *src, char *scope, char *name)
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{
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if(slen(scope) + slen(name) >= 0x3f) {
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error_asm("Sublabel length too long", name);
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return NULL;
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char *d = dict;
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for(d = dict; d < dictnext; d++) {
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char *ss = s, *dd = d, a, b;
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while((a = *dd++) == (b = *ss++))
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if(!a && !b) return d;
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}
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return scat(scat(scpy(scope, src, 0x40), "/"), name);
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return save(s, c);
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}
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static Macro *
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findmacro(char *name)
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static Item *
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finditem(char *name, Item *list, int len)
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{
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int i;
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for(i = 0; i < p.macro_len; i++)
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if(scmp(p.macros[i].name, name, 0x40))
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return &p.macros[i];
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return NULL;
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}
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static Label *
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findlabel(char *name)
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{
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int i;
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for(i = 0; i < p.label_len; i++)
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if(scmp(p.labels[i].name, name, 0x40))
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return &p.labels[i];
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if(name[0] == '&')
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name = join(scope, '/', name + 1);
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for(i = 0; i < len; i++)
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if(scmp(list[i].name, name, 0x40))
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return &list[i];
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return NULL;
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}
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@ -125,19 +86,18 @@ findopcode(char *s)
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{
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int i;
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for(i = 0; i < 0x20; i++) {
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int m = 0;
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if(!scmp(ops[i], s, 3))
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continue;
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if(!i) i |= (1 << 7); /* force keep for LIT */
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while(s[3 + m]) {
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if(s[3 + m] == '2')
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i |= (1 << 5); /* mode: short */
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else if(s[3 + m] == 'r')
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i |= (1 << 6); /* mode: return */
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else if(s[3 + m] == 'k')
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i |= (1 << 7); /* mode: keep */
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int m = 3;
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if(!scmp(ops[i], s, 3)) continue;
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if(!i) i |= (1 << 7);
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while(s[m]) {
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if(s[m] == '2')
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i |= (1 << 5);
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else if(s[m] == 'r')
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i |= (1 << 6);
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else if(s[m] == 'k')
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i |= (1 << 7);
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else
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return 0; /* failed to match */
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return 0;
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m++;
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}
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return i;
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@ -146,395 +106,309 @@ findopcode(char *s)
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}
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static int
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makemacro(char *name, FILE *f)
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walkcomment(FILE *f, Context *ctx)
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{
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Macro *m;
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char word[0x40];
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if(findmacro(name))
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return error_asm("Macro duplicate", name);
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if(sihx(name) && slen(name) % 2 == 0)
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return error_asm("Macro name is hex number", name);
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if(findopcode(name) || scmp(name, "BRK", 4) || !slen(name))
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return error_asm("Macro name is invalid", name);
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if(p.macro_len == 0x100)
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return error_asm("Macros limit exceeded", name);
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m = &p.macros[p.macro_len++];
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scpy(name, m->name, 0x40);
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while(fscanf(f, "%63s", word) == 1) {
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if(word[0] == '{') continue;
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if(word[0] == '}') break;
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if(word[0] == '%')
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return error_asm("Macro error", name);
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if(m->len >= 0x40)
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return error_asm("Macro size exceeded", name);
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scpy(word, m->items[m->len++], 0x40);
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char c;
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int depth = 1;
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while(f && fread(&c, 1, 1, f)) {
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if(c == 0xa) ctx->line += 1;
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if(c == '(') depth++;
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if(c == ')' && --depth < 1) return 1;
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}
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return 0;
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}
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static int
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walkmacro(Item *m, Context *ctx)
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{
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char c, *contentptr = m->content, *cptr = token;
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while((c = *contentptr++)) {
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if(c < 0x21) {
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*cptr++ = 0x00;
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if(token[0] && !parse(token, NULL, ctx)) return 0;
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cptr = token;
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} else
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*cptr++ = c;
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}
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return 1;
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}
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static int
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isrune(char c)
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walkfile(FILE *f, Context *ctx)
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{
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char cc, *r = runes;
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while((cc = *r++))
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if(c == cc) return 1;
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char c, *cptr = token;
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while(f && fread(&c, 1, 1, f)) {
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if(c == 0xa) ctx->line += 1;
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if(c < 0x21) {
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*cptr++ = 0x00;
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if(token[0] && !parse(token, f, ctx))
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return 0;
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}
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static int
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makelabel(char *name)
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{
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Label *l;
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if(findlabel(name))
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return error_asm("Label duplicate", name);
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if(sihx(name) && (slen(name) == 2 || slen(name) == 4))
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return error_asm("Label name is hex number", name);
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if(findopcode(name) || scmp(name, "BRK", 4) || !slen(name))
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return error_asm("Label name is invalid", name);
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if(isrune(name[0]))
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return error_asm("Label name is runic", name);
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if(p.label_len == 0x400)
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return error_asm("Labels limit exceeded", name);
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l = &p.labels[p.label_len++];
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l->addr = p.ptr;
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l->refs = 0;
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scpy(name, l->name, 0x40);
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cptr = token;
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} else if(cptr - token < 0x3f)
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*cptr++ = c;
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else
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return error_asm("Token too long");
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}
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return 1;
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}
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static char *
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makelambda(int id)
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{
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scpy("lambda", p.lambda, 0x07);
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p.lambda[6] = '0' + (id >> 0x4);
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p.lambda[7] = '0' + (id & 0xf);
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return p.lambda;
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lambda[0] = (char)0xce;
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lambda[1] = (char)0xbb;
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lambda[2] = hexad[id >> 0x4];
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lambda[3] = hexad[id & 0xf];
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return lambda;
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}
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static int
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makereference(char *scope, char *label, char rune, Uint16 addr)
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makemacro(char *name, FILE *f, Context *ctx)
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{
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char subw[0x40], parent[0x40];
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Reference *r;
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if(p.refs_len >= 0x1000)
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return error_asm("References limit exceeded", label);
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r = &p.refs[p.refs_len++];
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char c;
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Item *m;
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if(macro_len >= 0x100) return error_asm("Macros limit exceeded");
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if(isinvalid(name)) return error_asm("Macro is invalid");
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if(findmacro(name)) return error_asm("Macro is duplicate");
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m = ¯os[macro_len++];
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m->name = push(name, 0);
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m->content = dictnext;
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while(f && fread(&c, 1, 1, f) && c != '{')
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if(c == 0xa) ctx->line += 1;
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while(f && fread(&c, 1, 1, f) && c != '}') {
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if(c == 0xa) ctx->line += 1;
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if(c == '%') return 0;
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if(c == '(')
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walkcomment(f, ctx);
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else
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*dictnext++ = c;
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}
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*dictnext++ = 0;
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return 1;
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}
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static int
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makelabel(char *name, int setscope, Context *ctx)
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{
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Item *l;
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if(name[0] == '&')
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name = join(scope, '/', name + 1);
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if(labels_len >= 0x400) return error_asm("Labels limit exceeded");
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if(isinvalid(name)) return error_asm("Label is invalid");
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if(findlabel(name)) return error_asm("Label is duplicate");
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l = &labels[labels_len++];
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l->name = push(name, 0);
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l->addr = ptr;
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l->refs = 0;
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if(setscope) {
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int i = 0;
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while(name[i] != '/' && i < 0x3e && (scope[i] = name[i]))
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i++;
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scope[i] = '\0';
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}
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return 1;
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}
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static int
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makeref(char *label, char rune, Uint16 addr)
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{
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Item *r;
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if(refs_len >= 0x1000) return error_top("References limit exceeded", label);
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r = &refs[refs_len++];
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if(label[0] == '{') {
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p.lambda_stack[p.lambda_ptr++] = p.lambda_count;
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scpy(makelambda(p.lambda_count++), r->name, 0x40);
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lambda_stack[lambda_ptr++] = lambda_len;
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r->name = push(makelambda(lambda_len++), 0);
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} else if(label[0] == '&' || label[0] == '/') {
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if(!sublabel(subw, scope, label + 1))
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return error_asm("Invalid sublabel", label);
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scpy(subw, r->name, 0x40);
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} else {
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int pos = spos(label, '/');
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if(pos > 0) {
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Label *l;
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if((l = findlabel(scpy(label, parent, pos))))
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l->refs++;
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}
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scpy(label, r->name, 0x40);
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}
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r->name = join(scope, '/', label + 1);
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} else
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r->name = push(label, 0);
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r->rune = rune;
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r->addr = addr;
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return 1;
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}
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static int
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writebyte(Uint8 b)
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writepad(char *w)
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{
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if(p.ptr < TRIM)
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return error_asm("Writing in zero-page", "");
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else if(p.ptr > 0xffff)
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return error_asm("Writing after the end of RAM", "");
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else if(p.ptr < p.length)
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return error_asm("Memory overwrite", "");
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p.data[p.ptr++] = b;
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p.length = p.ptr;
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Item *l;
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int rel = w[0] == '$' ? ptr : 0;
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if(ishex(w + 1)) {
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ptr = shex(w + 1) + rel;
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return 1;
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}
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if((l = findlabel(w + 1))) {
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ptr = l->addr + rel;
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return 1;
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}
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return 0;
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}
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static int
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writebyte(Uint8 b, Context *ctx)
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{
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if(ptr < PAGE)
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return error_asm("Writing in zero-page");
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else if(ptr >= 0x10000)
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return error_asm("Writing outside memory");
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else if(ptr < length)
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return error_asm("Writing rewind");
|
||||
data[ptr++] = b;
|
||||
if(b)
|
||||
length = ptr;
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
writeopcode(char *w)
|
||||
writehex(char *w, Context *ctx)
|
||||
{
|
||||
return writebyte(findopcode(w));
|
||||
if(*w == '#')
|
||||
writebyte(findopcode("LIT") | !!(++w)[2] << 5, ctx);
|
||||
if(!w[2])
|
||||
return writebyte(shex(w), ctx);
|
||||
else if(!w[4])
|
||||
return writeshort(shex(w));
|
||||
else
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
writeshort(Uint16 s, int lit)
|
||||
writestring(char *w, Context *ctx)
|
||||
{
|
||||
if(lit)
|
||||
if(!writebyte(findopcode("LIT2"))) return 0;
|
||||
return writebyte(s >> 8) && writebyte(s & 0xff);
|
||||
char c;
|
||||
while((c = *(w++)))
|
||||
if(!writebyte(c, ctx)) return 0;
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
writelitbyte(Uint8 b)
|
||||
{
|
||||
return writebyte(findopcode("LIT")) && writebyte(b);
|
||||
}
|
||||
|
||||
static int
|
||||
doinclude(char *filename)
|
||||
assemble(char *filename)
|
||||
{
|
||||
FILE *f;
|
||||
char w[0x40];
|
||||
if(!(f = fopen(setlocation(filename), "r")))
|
||||
return error_asm("Include missing", filename);
|
||||
while(fscanf(f, "%63s", w) == 1)
|
||||
if(!parse(w, f))
|
||||
return error_asm("Unknown token", w);
|
||||
int res = 0;
|
||||
Context ctx;
|
||||
ctx.line = 0;
|
||||
ctx.path = push(filename, 0);
|
||||
if(!(f = fopen(filename, "r")))
|
||||
return error_top("Invalid source", filename);
|
||||
res = walkfile(f, &ctx);
|
||||
fclose(f);
|
||||
return 1;
|
||||
return res;
|
||||
}
|
||||
|
||||
static int
|
||||
parse(char *w, FILE *f)
|
||||
parse(char *w, FILE *f, Context *ctx)
|
||||
{
|
||||
int i;
|
||||
char word[0x40], subw[0x40], c;
|
||||
Label *l;
|
||||
Macro *m;
|
||||
if(slen(w) >= 63)
|
||||
return error_asm("Invalid token", w);
|
||||
Item *m;
|
||||
switch(w[0]) {
|
||||
case '(': /* comment */
|
||||
if(slen(w) != 1) fprintf(stderr, "-- Malformed comment: %s\n", w);
|
||||
i = 1; /* track nested comment depth */
|
||||
while(fscanf(f, "%63s", word) == 1) {
|
||||
if(slen(word) != 1)
|
||||
continue;
|
||||
else if(word[0] == '(')
|
||||
i++;
|
||||
else if(word[0] == ')' && --i < 1)
|
||||
break;
|
||||
}
|
||||
break;
|
||||
case '~': /* include */
|
||||
if(!doinclude(w + 1))
|
||||
return error_asm("Invalid include", w);
|
||||
break;
|
||||
case '%': /* macro */
|
||||
if(!makemacro(w + 1, f))
|
||||
return error_asm("Invalid macro", w);
|
||||
break;
|
||||
case '|': /* pad-absolute */
|
||||
if(sihx(w + 1))
|
||||
p.ptr = shex(w + 1);
|
||||
else if(w[1] == '&') {
|
||||
if(!sublabel(subw, p.scope, w + 2) || !(l = findlabel(subw)))
|
||||
return error_asm("Invalid sublabel", w);
|
||||
p.ptr = l->addr;
|
||||
} else {
|
||||
if(!(l = findlabel(w + 1)))
|
||||
return error_asm("Invalid label", w);
|
||||
p.ptr = l->addr;
|
||||
}
|
||||
break;
|
||||
case '$': /* pad-relative */
|
||||
if(sihx(w + 1))
|
||||
p.ptr += shex(w + 1);
|
||||
else if(w[1] == '&') {
|
||||
if(!sublabel(subw, p.scope, w + 2) || !(l = findlabel(subw)))
|
||||
return error_asm("Invalid sublabel", w);
|
||||
p.ptr += l->addr;
|
||||
} else {
|
||||
if(!(l = findlabel(w + 1)))
|
||||
return error_asm("Invalid label", w);
|
||||
p.ptr += l->addr;
|
||||
}
|
||||
break;
|
||||
case '@': /* label */
|
||||
if(!makelabel(w + 1))
|
||||
return error_asm("Invalid label", w);
|
||||
i = 0;
|
||||
while(w[i + 1] != '/' && i < 0x3e && (p.scope[i] = w[i + 1]))
|
||||
i++;
|
||||
p.scope[i] = '\0';
|
||||
break;
|
||||
case '&': /* sublabel */
|
||||
if(!sublabel(subw, p.scope, w + 1) || !makelabel(subw))
|
||||
return error_asm("Invalid sublabel", w);
|
||||
break;
|
||||
case '#': /* literals hex */
|
||||
if(sihx(w + 1) && slen(w) == 3)
|
||||
return writelitbyte(shex(w + 1));
|
||||
else if(sihx(w + 1) && slen(w) == 5)
|
||||
return writeshort(shex(w + 1), 1);
|
||||
else
|
||||
return error_asm("Invalid hex literal", w);
|
||||
break;
|
||||
case '_': /* raw byte relative */
|
||||
return makereference(p.scope, w + 1, w[0], p.ptr) && writebyte(0xff);
|
||||
case ',': /* literal byte relative */
|
||||
return makereference(p.scope, w + 1, w[0], p.ptr + 1) && writelitbyte(0xff);
|
||||
case '-': /* raw byte absolute */
|
||||
return makereference(p.scope, w + 1, w[0], p.ptr) && writebyte(0xff);
|
||||
case '.': /* literal byte zero-page */
|
||||
return makereference(p.scope, w + 1, w[0], p.ptr + 1) && writelitbyte(0xff);
|
||||
case ':': fprintf(stderr, "Deprecated rune %s, use =%s\n", w, w + 1);
|
||||
case '=': /* raw short absolute */
|
||||
return makereference(p.scope, w + 1, w[0], p.ptr) && writeshort(0xffff, 0);
|
||||
case ';': /* literal short absolute */
|
||||
return makereference(p.scope, w + 1, w[0], p.ptr + 1) && writeshort(0xffff, 1);
|
||||
case '?': /* JCI */
|
||||
return makereference(p.scope, w + 1, w[0], p.ptr + 1) && writebyte(0x20) && writeshort(0xffff, 0);
|
||||
case '!': /* JMI */
|
||||
return makereference(p.scope, w + 1, w[0], p.ptr + 1) && writebyte(0x40) && writeshort(0xffff, 0);
|
||||
case '"': /* raw string */
|
||||
i = 0;
|
||||
while((c = w[++i]))
|
||||
if(!writebyte(c)) return 0;
|
||||
break;
|
||||
case '}': /* lambda end */
|
||||
if(!makelabel(makelambda(p.lambda_stack[--p.lambda_ptr])))
|
||||
return error_asm("Invalid label", w);
|
||||
break;
|
||||
case '(': return !walkcomment(f, ctx) ? error_asm("Invalid comment") : 1;
|
||||
case '%': return !makemacro(w + 1, f, ctx) ? error_asm("Invalid macro") : 1;
|
||||
case '@': return !makelabel(w + 1, 1, ctx) ? error_asm("Invalid label") : 1;
|
||||
case '&': return !makelabel(w, 0, ctx) ? error_asm("Invalid sublabel") : 1;
|
||||
case '}': return !makelabel(makelambda(lambda_stack[--lambda_ptr]), 0, ctx) ? error_asm("Invalid label") : 1;
|
||||
case '#': return !ishex(w + 1) || !writehex(w, ctx) ? error_asm("Invalid hexadecimal") : 1;
|
||||
case '_': return makeref(w + 1, w[0], ptr) && writebyte(0xff, ctx);
|
||||
case ',': return makeref(w + 1, w[0], ptr + 1) && writebyte(findopcode("LIT"), ctx) && writebyte(0xff, ctx);
|
||||
case '-': return makeref(w + 1, w[0], ptr) && writebyte(0xff, ctx);
|
||||
case '.': return makeref(w + 1, w[0], ptr + 1) && writebyte(findopcode("LIT"), ctx) && writebyte(0xff, ctx);
|
||||
case ':': fprintf(stderr, "Deprecated rune %s, use =%s\n", w, w + 1); /* fall-through */
|
||||
case '=': return makeref(w + 1, w[0], ptr) && writeshort(0xffff);
|
||||
case ';': return makeref(w + 1, w[0], ptr + 1) && writebyte(findopcode("LIT2"), ctx) && writeshort(0xffff);
|
||||
case '?': return makeref(w + 1, w[0], ptr + 1) && writebyte(0x20, ctx) && writeshort(0xffff);
|
||||
case '!': return makeref(w + 1, w[0], ptr + 1) && writebyte(0x40, ctx) && writeshort(0xffff);
|
||||
case '"': return !writestring(w + 1, ctx) ? error_asm("Invalid string") : 1;
|
||||
case '~': return !assemble(w + 1) ? error_asm("Invalid include") : 1;
|
||||
case '$':
|
||||
case '|': return !writepad(w) ? error_asm("Invalid padding") : 1;
|
||||
case '[':
|
||||
case ']':
|
||||
if(slen(w) == 1) break; /* else fallthrough */
|
||||
default:
|
||||
/* opcode */
|
||||
if(findopcode(w) || scmp(w, "BRK", 4))
|
||||
return writeopcode(w);
|
||||
/* raw byte */
|
||||
else if(sihx(w) && slen(w) == 2)
|
||||
return writebyte(shex(w));
|
||||
/* raw short */
|
||||
else if(sihx(w) && slen(w) == 4)
|
||||
return writeshort(shex(w), 0);
|
||||
/* macro */
|
||||
else if((m = findmacro(w))) {
|
||||
for(i = 0; i < m->len; i++)
|
||||
if(!parse(m->items[i], f))
|
||||
return 0;
|
||||
return 1;
|
||||
} else
|
||||
return makereference(p.scope, w, ' ', p.ptr + 1) && writebyte(0x60) && writeshort(0xffff, 0);
|
||||
case ']': return 1;
|
||||
}
|
||||
return 1;
|
||||
if(ishex(w)) return writehex(w, ctx);
|
||||
if(isopc(w)) return writebyte(findopcode(w), ctx);
|
||||
if((m = findmacro(w))) return walkmacro(m, ctx);
|
||||
return makeref(w, ' ', ptr + 1) && writebyte(0x60, ctx) && writeshort(0xffff);
|
||||
}
|
||||
|
||||
static int
|
||||
resolve(void)
|
||||
{
|
||||
Label *l;
|
||||
int i;
|
||||
Uint16 a;
|
||||
for(i = 0; i < p.refs_len; i++) {
|
||||
Reference *r = &p.refs[i];
|
||||
int i, rel;
|
||||
if(!length) return error_top("Assembly", "Output rom is empty.");
|
||||
for(i = 0; i < refs_len; i++) {
|
||||
Item *r = &refs[i], *l = findlabel(r->name);
|
||||
Uint8 *rom = data + r->addr;
|
||||
if(!l) return 0;
|
||||
switch(r->rune) {
|
||||
case '_':
|
||||
case ',':
|
||||
if(!(l = findlabel(r->name)))
|
||||
return error_top("Unknown relative reference", r->name);
|
||||
p.data[r->addr] = (Sint8)(l->addr - r->addr - 2);
|
||||
if((Sint8)p.data[r->addr] != (l->addr - r->addr - 2))
|
||||
return error_asm("Relative reference is too far", r->name);
|
||||
l->refs++;
|
||||
*rom = rel = l->addr - r->addr - 2;
|
||||
if((Sint8)data[r->addr] != rel)
|
||||
return error_top("Relative reference is too far", r->name);
|
||||
break;
|
||||
case '-':
|
||||
case '.':
|
||||
if(!(l = findlabel(r->name)))
|
||||
return error_top("Unknown zero-page reference", r->name);
|
||||
p.data[r->addr] = l->addr & 0xff;
|
||||
l->refs++;
|
||||
*rom = l->addr;
|
||||
break;
|
||||
case ':':
|
||||
case '=':
|
||||
case ';':
|
||||
if(!(l = findlabel(r->name)))
|
||||
return error_top("Unknown absolute reference", r->name);
|
||||
p.data[r->addr] = l->addr >> 0x8;
|
||||
p.data[r->addr + 1] = l->addr & 0xff;
|
||||
l->refs++;
|
||||
*rom++ = l->addr >> 8, *rom = l->addr;
|
||||
break;
|
||||
case '?':
|
||||
case '!':
|
||||
default:
|
||||
if(!(l = findlabel(r->name)))
|
||||
return error_top("Unknown absolute reference", r->name);
|
||||
a = l->addr - r->addr - 2;
|
||||
p.data[r->addr] = a >> 0x8;
|
||||
p.data[r->addr + 1] = a & 0xff;
|
||||
l->refs++;
|
||||
rel = l->addr - r->addr - 2;
|
||||
*rom++ = rel >> 8, *rom = rel;
|
||||
break;
|
||||
}
|
||||
l->refs++;
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
assemble(FILE *f)
|
||||
{
|
||||
char w[0x40];
|
||||
p.ptr = 0x100;
|
||||
scpy("on-reset", p.scope, 0x40);
|
||||
while(fscanf(f, "%62s", w) == 1)
|
||||
if(slen(w) > 0x3d || !parse(w, f))
|
||||
return error_asm("Invalid token", w);
|
||||
return resolve();
|
||||
}
|
||||
|
||||
static void
|
||||
review(char *filename)
|
||||
build(char *rompath)
|
||||
{
|
||||
int i;
|
||||
for(i = 0; i < p.label_len; i++)
|
||||
if(p.labels[i].name[0] >= 'A' && p.labels[i].name[0] <= 'Z')
|
||||
continue; /* Ignore capitalized labels(devices) */
|
||||
else if(!p.labels[i].refs)
|
||||
fprintf(stdout, "-- Unused label: %s\n", p.labels[i].name);
|
||||
FILE *dst, *dstsym;
|
||||
char *sympath = join(rompath, '.', "sym");
|
||||
/* rom */
|
||||
if(!(dst = fopen(rompath, "wb")))
|
||||
return !error_top("Invalid output file", rompath);
|
||||
for(i = 0; i < labels_len; i++)
|
||||
if(labels[i].name[0] - 'A' > 25 && !labels[i].refs)
|
||||
fprintf(stdout, "-- Unused label: %s\n", labels[i].name);
|
||||
fwrite(data + PAGE, length - PAGE, 1, dst);
|
||||
fprintf(stdout,
|
||||
"Assembled %s in %d bytes(%.2f%% used), %d labels, %d macros.\n",
|
||||
filename,
|
||||
p.length - TRIM,
|
||||
(p.length - TRIM) / 652.80,
|
||||
p.label_len,
|
||||
p.macro_len);
|
||||
}
|
||||
|
||||
static void
|
||||
writesym(char *filename)
|
||||
{
|
||||
int i;
|
||||
char symdst[0x60];
|
||||
FILE *fp;
|
||||
if(slen(filename) > 0x60 - 5)
|
||||
return;
|
||||
fp = fopen(scat(scpy(filename, symdst, slen(filename) + 1), ".sym"), "w");
|
||||
if(fp != NULL) {
|
||||
for(i = 0; i < p.label_len; i++) {
|
||||
Uint8 hb = p.labels[i].addr >> 8, lb = p.labels[i].addr & 0xff;
|
||||
fwrite(&hb, 1, 1, fp);
|
||||
fwrite(&lb, 1, 1, fp);
|
||||
fwrite(p.labels[i].name, slen(p.labels[i].name) + 1, 1, fp);
|
||||
rompath,
|
||||
length - PAGE,
|
||||
(length - PAGE) / 652.80,
|
||||
labels_len,
|
||||
macro_len);
|
||||
/* sym */
|
||||
if(!(dstsym = fopen(sympath, "w")))
|
||||
return !error_top("Invalid symbols file", sympath);
|
||||
for(i = 0; i < labels_len; i++) {
|
||||
Uint8 hb = labels[i].addr >> 8, lb = labels[i].addr;
|
||||
char c, d = 0, *name = labels[i].name;
|
||||
fwrite(&hb, 1, 1, dstsym);
|
||||
fwrite(&lb, 1, 1, dstsym);
|
||||
while((c = *name++)) fwrite(&c, 1, 1, dstsym);
|
||||
fwrite(&d, 1, 1, dstsym);
|
||||
}
|
||||
}
|
||||
fclose(fp);
|
||||
fclose(dst), fclose(dstsym);
|
||||
return 1;
|
||||
}
|
||||
|
||||
int
|
||||
main(int argc, char *argv[])
|
||||
{
|
||||
FILE *src, *dst;
|
||||
if(argc == 1)
|
||||
return error_top("usage", "uxnasm [-v] input.tal output.rom");
|
||||
if(argv[1][0] == '-' && argv[1][1] == 'v')
|
||||
return !fprintf(stdout, "Uxnasm - Uxntal Assembler, 7 Mar 2024.\n");
|
||||
if(!(src = fopen(setlocation(argv[1]), "r")))
|
||||
return !error_top("Invalid input", argv[1]);
|
||||
p.entry = argv[1];
|
||||
if(!assemble(src))
|
||||
return !error_top("Assembly", "Failed to assemble rom.");
|
||||
if(!(dst = fopen(argv[2], "wb")))
|
||||
return !error_top("Invalid Output", argv[2]);
|
||||
if(p.length <= TRIM)
|
||||
return !error_top("Assembly", "Output rom is empty.");
|
||||
fwrite(p.data + TRIM, p.length - TRIM, 1, dst);
|
||||
if(!scmp(argv[2], "-", 2)) {
|
||||
review(argv[2]);
|
||||
writesym(argv[2]);
|
||||
}
|
||||
ptr = PAGE;
|
||||
scpy("on-reset", scope, 0x40);
|
||||
if(argc == 1) return error_top("usage", "uxnasm [-v] input.tal output.rom");
|
||||
if(scmp(argv[1], "-v", 2)) return !fprintf(stdout, "Uxnasm - Uxntal Assembler, 28 Mar 2024.\n");
|
||||
if(!assemble(argv[1]) || !length) return !error_top("Assembly", "Failed to assemble rom.");
|
||||
if(!resolve()) return !error_top("Assembly", "Failed to resolve symbols.");
|
||||
if(!build(argv[2])) return !error_top("Assembly", "Failed to build rom.");
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue