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a09.c
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a09.c
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/****************************************************************************
*
* Main program for as09
* Copyright (C) 2023 Sean Conner
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Comments, questions and criticisms can be sent to: [email protected]
*
****************************************************************************/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <ctype.h>
#include "a09.h"
/**************************************************************************
* Checking assumptions at compile time. Technique from
* https://jorenar.com/blog/less-known-c#compile-time-assumption-checking-using-enums
***************************************************************************/
enum
{
BYTE_ADDRESSABILITY = 1 / (CHAR_BIT == 8),
TWOS_COMPLEMENT = 1 / (SCHAR_MIN == -128),
IEEE_754_FLOAT = 1 / (sizeof(uint32_t) == sizeof(float)),
IEEE_754_DOUBLE = 1 / (sizeof(uint64_t) == sizeof(double)),
};
/**************************************************************************/
char const MSG_DEBUG[] = "debug";
char const MSG_WARNING[] = "warning";
char const MSG_ERROR[] = "error";
/**************************************************************************/
static bool check_warning_tag(struct a09 *a09,char const *tag,div_t *pres)
{
assert(a09 != NULL);
assert(tag != NULL);
assert(pres != NULL);
if ((tag[0] == 'W') && isdigit(tag[1]) && isdigit(tag[2]) && isdigit(tag[3]) && isdigit(tag[4]) && !isdigit(tag[5]))
{
assert(sizeof(a09->nowarn) < INT_MAX);
int num = (tag[1] - '0') * 1000
+ (tag[2] - '0') * 100
+ (tag[3] - '0') * 10
+ (tag[4] - '0');
*pres = div(num,CHAR_BIT);
assert(pres->quot >= 0);
assert(pres->quot < (int)(sizeof(a09->nowarn)));
assert(pres->rem >= 0);
assert(pres->rem < CHAR_BIT);
return true;
}
else
return message(a09,MSG_ERROR,"E0012: invalid warning '%s'",tag);
}
/**************************************************************************/
bool enable_warning(struct a09 *a09,char const *tag)
{
div_t res;
assert(a09 != NULL);
assert(tag != NULL);
if (!check_warning_tag(a09,tag,&res))
return false;
a09->nowarn[res.quot] &= (~(1 << res.rem));
return true;
}
/**************************************************************************/
bool disable_warning(struct a09 *a09,char const *tag)
{
div_t res;
assert(a09 != NULL);
assert(tag != NULL);
if (!check_warning_tag(a09,tag,&res))
return false;
a09->nowarn[res.quot] |= 1 << res.rem;
return true;
}
/**************************************************************************/
bool message(struct a09 *a09,char const *restrict tag,char const *restrict fmt,...)
{
assert(a09 != NULL);
assert(tag != NULL);
assert(fmt != NULL);
assert(
((tag == MSG_WARNING) && (fmt[0] == 'W'))
|| ((tag == MSG_ERROR) && (fmt[0] == 'E'))
|| ((tag == MSG_DEBUG))
);
va_list ap;
if ((tag == MSG_DEBUG) && !a09->debug)
return true;
if (fmt[0] == 'W')
{
div_t res;
bool rc = check_warning_tag(a09,fmt,&res);
assert(rc);
(void)rc;
if ((a09->nowarn[res.quot] & (1 << res.rem)))
return true;
}
if (a09->lnum > 0)
fprintf(stderr,"%s:%zu: %s: ",a09->infile,a09->lnum,tag);
else
fprintf(stderr,"%s: %s: ",a09->infile,tag);
va_start(ap,fmt);
#if defined(__clang__)
# pragma clang diagnostic push "-Wformat-nonliteral"
# pragma clang diagnostic ignored "-Wformat-nonliteral"
#endif
vfprintf(stderr,fmt,ap);
#if defined(__clang__)
# pragma clang diagnostic pop "-Wformat-nonliteral"
#endif
va_end(ap);
fprintf(stderr,"\n");
return tag != MSG_ERROR;
}
/**************************************************************************/
char *add_file_dep(struct a09 *a09,char const *filename)
{
char **deps;
char *name;
size_t len;
assert(a09 != NULL);
assert(filename != NULL);
for (size_t i = 0 ; i < a09->ndeps ; i++)
{
if (strcmp(a09->deps[i],filename) == 0)
return a09->deps[i];
}
deps = realloc(a09->deps,(a09->ndeps + 1) * sizeof(char *));
if (deps == NULL)
{
message(a09,MSG_ERROR,"E0046: out of memory");
return NULL;
}
len = strlen(filename) + 1;
name = malloc(len);
if (name == NULL)
{
message(a09,MSG_ERROR,"E0046: out of memory");
return NULL;
}
memcpy(name,filename,len);
name[len - 1] = '\0';
a09->deps = deps;
a09->deps[a09->ndeps++] = name;
return name;
}
/**************************************************************************/
static bool add_include_file(struct a09 *a09,char const *filename)
{
char **includes;
char *name;
size_t len;
assert(a09 != NULL);
assert(filename != NULL);
includes = realloc(a09->includes,(a09->nincs + 1) * sizeof(char *));
if (includes == NULL)
return message(a09,MSG_ERROR,"E0046: out of memory");
len = strlen(filename) + 1;
name = malloc(len);
if (name == NULL)
return message(a09,MSG_ERROR,"E0046: out of memory");
memcpy(name,filename,len);
name[len - 1] = '\0';
a09->includes = includes;
a09->includes[a09->nincs++] = name;
return true;
}
/**************************************************************************/
bool read_line(FILE *in,struct buffer *buffer)
{
assert(in != NULL);
assert(buffer != NULL);
buffer->widx = 0;
buffer->ridx = 0;
while(!feof(in))
{
int c = fgetc(in);
if (c == EOF) return false;
if (c == '\n') break;
if (c == '\t')
{
for (size_t num = 8 - (buffer->widx & 7) , j = 0 ; j < num ; j++)
{
if (buffer->widx == sizeof(buffer->buf)-1)
return false;
buffer->buf[buffer->widx++] = ' ';
}
}
else if (isprint(c))
{
if (buffer->widx == sizeof(buffer->buf)-1)
return false;
buffer->buf[buffer->widx++] = c;
}
else
return false;
}
assert(buffer->widx < sizeof(buffer->buf));
buffer->buf[buffer->widx] = '\0';
return true;
}
/**************************************************************************/
bool read_label(struct buffer *buffer,label *label,char c)
{
bool toolong = false;
assert(buffer != NULL);
assert(label != NULL);
assert(isgraph(c));
size_t i = 0;
while((c == '.') || (c == '_') || (c == '$') || isalnum(c))
{
if (i < sizeof(label->text))
label->text[i++] = c;
else
toolong = true;
c = buffer->buf[buffer->ridx++];
}
label->s = i;
assert(buffer->ridx > 0);
buffer->ridx--;
return toolong;
}
/**************************************************************************/
bool parse_label(label *res,struct buffer *buffer,struct a09 *a09,int pass)
{
assert(res != NULL);
assert(buffer != NULL);
assert(a09 != NULL);
assert((pass == 1) || (pass == 2));
label tmp;
char c = buffer->buf[buffer->ridx];
bool toolong;
if ((c == '.') || (c == '_') || isalpha(c))
{
buffer->ridx++;
toolong = read_label(buffer,&tmp,c);
if (tmp.text[0] == '.')
{
memcpy(res->text,a09->label.text,a09->label.s);
size_t s = min(tmp.s,sizeof(tmp.text) - a09->label.s);
assert(s <= sizeof(res->text));
memcpy(&res->text[a09->label.s],tmp.text,s);
res->s = a09->label.s + s;
assert(res->s <= sizeof(res->text));
if ((pass == 1) && (a09->label.s + tmp.s > sizeof(res->text)))
message(a09,MSG_WARNING,"W0001: label '%.*s' exceeds %zu characters",res->s,res->text,sizeof(res->text));
}
else
{
if (toolong && (pass == 1))
message(a09,MSG_WARNING,"W0001: label '%.*s' exceeds %zu characters",tmp.s,tmp.text,sizeof(tmp.text));
*res = tmp;
}
return true;
}
else
return false;
}
/**************************************************************************/
void upper_label(label *res)
{
assert(res != NULL);
for (size_t i = 0 ; i < res->s ; i++)
res->text[i] = toupper(res->text[i]);
}
/**************************************************************************/
bool parse_op(struct buffer *buffer,struct opcode const **pop)
{
assert(buffer != NULL);
assert(pop != NULL);
char top[10];
char c = 0;
for (size_t i = 0 ; i < 10 ; i++)
{
c = buffer->buf[buffer->ridx];
if (isspace(c) || (c == '\0'))
{
top[i] = '\0';
*pop = op_find(top);
return *pop != NULL;
}
else if (!isalpha(c) && !isdigit(c) && (c != '.'))
break;
top[i] = toupper(c);
buffer->ridx++;
}
assert(c != 0);
return false;
}
/**************************************************************************/
char skip_space(struct buffer *buffer)
{
assert(buffer != NULL);
char c;
do
{
c = buffer->buf[buffer->ridx];
if (c == '\0')
return c;
buffer->ridx++;
} while (isspace(c));
return c;
}
/**************************************************************************/
bool print_list(struct a09 *a09,struct opcdata *opd,bool labelonly)
{
assert(a09 != NULL);
assert(opd != NULL);
if ((a09->list != NULL) && (!opd->includehack))
{
if ((opd->sz == 0) && (opd->datasz == 0))
{
if (labelonly && opd->label.s > 0)
fprintf(a09->list,"%04X: %*s",a09->pc,a09->list_pad,"");
else
fprintf(a09->list," %*s",a09->list_pad,"");
}
else
{
if (opd->data)
{
size_t c = 0; // # byte columns printed
fprintf(a09->list,"%04X: ",a09->pc);
for (size_t i = 0 ; i < opd->sz ; i++,c++)
fprintf(a09->list,"%02X",opd->bytes[i]);
for ( ; c < sizeof(opd->bytes) ; c++)
fprintf(a09->list," ");
fprintf(a09->list,"%*s",a09->list_pad,"");
}
else
{
size_t i = 0; // index into opd->bytes[]
size_t c = 0; // # byte columns printed
fprintf(a09->list,"%04X: %02X",a09->pc,opd->bytes[i++]);
c++;
if ((opd->bytes[0] == 0x10) || (opd->bytes[0] == 0x11))
{
fprintf(a09->list,"%02X ",opd->bytes[i++]);
c++;
}
else
{
fprintf(a09->list," ");
c++;
}
for ( ; i < opd->sz ; i++)
{
fprintf(a09->list,"%02X",opd->bytes[i]);
c++;
}
for ( ; c < 5 ; c++)
fprintf(a09->list," ");
if (a09->cc)
{
if ((opd->op != NULL) && (opd->op->flag[0] != '\0'))
fprintf(a09->list," {%s}",opd->op->flag);
else
fputs(" ",a09->list);
}
if (a09->cycles && !opd->data)
{
char tcyc[8];
if (a09->cycles_detailed && (opd->ecycles > 0))
snprintf(tcyc,sizeof(tcyc),"[%zu+%zu]",opd->cycles,opd->ecycles);
else if (opd->acycles > 0)
snprintf(tcyc,sizeof(tcyc),"[%zu/%zu]",opd->cycles,opd->acycles);
else
snprintf(tcyc,sizeof(tcyc),"[%zu]",opd->cycles + opd->ecycles);
fprintf(a09->list," %-8s",tcyc);
if (a09->cycles_total)
{
a09->total_cycles += opd->cycles + opd->ecycles;
fprintf(a09->list," %7zu",a09->total_cycles);
}
}
}
}
fprintf(a09->list," %5zu | %s\n",a09->lnum,a09->inbuf.buf);
}
opd->includehack = false;
return true;
}
/**************************************************************************/
static bool parse_line(struct a09 *a09,struct buffer *buffer,int pass)
{
assert(a09 != NULL);
assert(buffer != NULL);
assert((pass == 1) || (pass == 2));
int c;
bool rc;
struct opcdata opd =
{
.a09 = a09,
.op = NULL,
.buffer = buffer,
.label = { .s = 0 },
.pass = pass,
.sz = 0,
.data = false,
.datasz = 0,
.cycles = 0,
.ecycles = 0,
.acycles = 0,
.mode = AM_INHERENT,
.value =
{
.value = 0,
.bits = 0,
.unknownpass1 = false,
.defined = false,
.external = false,
},
.bits = 16,
.pcrel = false,
.includehack = false,
};
if (parse_label(&opd.label,&a09->inbuf,a09,pass))
{
if (pass == 1)
{
if (symbol_add(a09,&opd.label,a09->pc) == NULL)
return false;
}
else if (pass == 2)
{
/*--------------------------------------------------------------
; On pass 2, all ADDRESS labels should be the same. If they're not,
; there's an internal error somewhere, so abort the assembly to avoid
; troubleshooting an assembler error in the program we're writing.
;---------------------------------------------------------------*/
struct symbol *sym = symbol_find(a09,&opd.label);
if (sym == NULL)
return message(a09,MSG_ERROR,"E0001: Internal error---'%.*s' should exist, but doesn't",a09->label.s,a09->label.text);
if ((sym->type == SYM_ADDRESS) && (sym->value != a09->pc))
return message(a09,MSG_ERROR,"E0002: Internal error---out of phase;\n\t'%.*s' = %04X pass 1, %04X pass 2",a09->label.s,a09->label.text,sym->value,a09->pc);
}
/*-------------------------------------------------------------------
; Check to see if we have a global label in case we have a local label
;--------------------------------------------------------------------*/
if ((pass == 1) && (opd.label.text[0] == '.') && (a09->label.s == 0))
message(a09,MSG_WARNING,"W0010: missing initial label");
/*-----------------------------------
; store the current global label
;------------------------------------*/
a09->label = opd.label;
char *p = memchr(a09->label.text,'.',a09->label.s);
if (p != NULL)
a09->label.s = (unsigned char)(p - a09->label.text);
}
c = skip_space(&a09->inbuf);
if ((c == ';') || (c == '\0'))
return print_list(a09,&opd,true);
a09->inbuf.ridx--; // ungetc()
if (!parse_op(&a09->inbuf,&opd.op))
return message(a09,MSG_ERROR,"E0003: unknown opcode");
opd.cycles = opd.op->cycles;
rc = opd.op->func(&opd);
if (rc)
{
print_list(a09,&opd,false);
if (opd.data)
a09->pc += opd.datasz;
else
a09->pc += opd.sz;
if ((pass == 2) && (opd.sz > 0) && (opd.datasz == 0) && a09->obj)
return a09->format.write(&a09->format,&opd,opd.bytes,opd.sz,INSTRUCTION);
}
return rc;
}
/**************************************************************************/
bool assemble_pass(struct a09 *a09,int pass)
{
assert(a09 != NULL);
assert(a09->in != NULL);
assert(pass >= 1);
assert(pass <= 2);
label saved = a09->label;
rewind(a09->in);
a09->lnum = 0;
a09->label = (label){ .s = 0 , .text = { '\0' } };
message(a09,MSG_DEBUG,"Pass %d",pass);
if (a09->runtests)
if (!test_pass_start(a09,pass))
return false;
if (!a09->format.pass_start(&a09->format,a09,pass))
return false;
while(!feof(a09->in))
{
if (!read_line(a09->in,&a09->inbuf))
break;
a09->lnum++;
if (!parse_line(a09,&a09->inbuf,pass))
return false;
}
if (!a09->format.pass_end(&a09->format,a09,pass))
return false;
if (a09->runtests)
if (!test_pass_end(a09,pass))
return false;
a09->label = saved;
return true;
}
/**************************************************************************/
static bool nowarnlist(struct a09 *a09,char const *warnings)
{
assert(a09 != NULL);
if (warnings == NULL)
return message(a09,MSG_ERROR,"E0068: missing option argument");
while(true)
{
if (!disable_warning(a09,warnings))
return message(a09,MSG_ERROR,"E0058: improper warning tag '%.4s'",warnings);
warnings += 5;
if (*warnings == '\0')
break;
if (*warnings++ != ',')
return message(a09,MSG_ERROR,"E0023: missing expected comma");
}
return true;
}
/**************************************************************************/
static int usage(char const *prog)
{
fprintf(
stderr,
"usage: %s [options] [files...]\n"
"\t-I dir\t\tadd directory for include files\n"
"\t-M\t\tgenerate Makefile dependencies on stdout\n"
"\t-T\t\trun tests with TAP output\n"
"\t-c file\t\tcore file (of 6809 VM) name (only if -t specified)\n"
"\t-d\t\tdebug output\n"
"\t-e ('c'|'d'|'f'|'t')\n"
"\t\t\tadd _c_ycles (_d_etailed and _t_otals) and/or _f_lags\n"
"\t\t\tin list file\n"
"\t-f format\toutput format (bin)\n"
"\t-h\t\thelp (this text)\n"
"\t-l listfile\tlist filename\n"
"\t-n Wxxxx\tsupress the given warnings\n"
"\t-o filename\toutput filename\n"
"\t-r\t\trandomize the testing order (only if -t specified)\n"
"\t-t\t\trun tests\n"
"\n"
"\tformats: bin rsdos srec basic\n"
"%s"
"%s"
"%s"
"%s"
"",
prog,
format_bin_usage,
format_rsdos_usage,
format_srec_usage,
format_basic_usage
);
return -1;
}
/**************************************************************************/
static int parse_command(int argc,char *argv[],struct a09 *a09)
{
struct arg arg;
char c;
assert(argc >= 1);
assert(argv != NULL);
assert(a09 != NULL);
arg_init(&arg,argv,argc);
while((c = arg_next(&arg)) != '\0')
{
char const *file;
char const *format;
char const *extra;
switch(c)
{
case 'I':
if ((file = arg_arg(&arg)) == NULL)
{
message(a09,MSG_ERROR,"E0068: missing option argument");
return -1;
}
if (!add_include_file(a09,file))
return -1;
break;
case 'M':
a09->mkdeps = true;
break;
case 'T':
a09->runtests = true;
a09->tapout = true;
break;
case 'c':
if ((a09->corefile = arg_arg(&arg)) == NULL)
{
message(a09,MSG_ERROR,"E0068: missing option argument");
return -1;
}
break;
case 'd':
a09->debug = true;
break;
case 'e':
if ((extra = arg_arg(&arg)) == NULL)
{
message(a09,MSG_ERROR,"E0068: missing option argument");
return -1;
}
while(*extra != '\0')
{
if (*extra == 'c')
{
a09->list_pad += 9;
a09->cycles = true;
}
else if (*extra == 'd')
{
a09->list_pad += 9;
a09->cycles = true;
a09->cycles_detailed = true;
}
else if (*extra == 'f')
{
a09->cc = true;
a09->list_pad += 8;
}
else if (*extra == 't')
a09->cycles_total = true;
else
{
message(a09,MSG_ERROR,"E9999: unsupported extra option");
return -1;
}
extra++;
}
if (a09->cycles && a09->cycles_total)
a09->list_pad += 8;
break;
case 'f':
format = arg_arg(&arg);
if (format == NULL)
{
message(a09,MSG_ERROR,"E0068: missing option argument");
return -1;
}
else if (strcmp(format,"bin") == 0)
{
if (!format_bin_init(a09))
return -1;
}
else if (strcmp(format,"rsdos") == 0)
{
if (!format_rsdos_init(a09))
return -1;
}
else if (strcmp(format,"srec") == 0)
{
if (!format_srec_init(a09))
return -1;
}
else if (strcmp(format,"basic") == 0)
{
if (!format_basic_init(a09))
return -1;
}
else
{
message(a09,MSG_ERROR,"E0053: format '%s' not supported",format);
return -1;
}
break;
case 'h':
return usage(argv[0]);
case 'l':
if ((a09->listfile = arg_arg(&arg)) == NULL)
{
message(a09,MSG_ERROR,"E0068: missing option argument");
return -1;
}
break;
case 'n':
if (!nowarnlist(a09,arg_arg(&arg)))
return -1;
break;
case 'o':
if ((a09->outfile = arg_arg(&arg)) == NULL)
{
message(a09,MSG_ERROR,"E0068: missing option argument");
return -1;
}
break;
case 'r':
a09->rndtests = true;
break;
case 't':
a09->runtests = true;
break;
default:
if (!a09->format.cmdline(&a09->format,a09,&arg,c))
{
fprintf(stderr,"unsupported option '%c'\n",c);
return usage(argv[0]);
}
break;
}
}
return arg_done(&arg);
}
/**************************************************************************/
static void warning_unused_symbols(struct a09 *a09,tree__s *tree)
{
assert(a09 != NULL);
if (tree != NULL)
{
warning_unused_symbols(a09,tree->left);
struct symbol *sym = tree2sym(tree);
if ((sym->refs == 0) && (sym->type == SYM_ADDRESS))
{
a09->lnum = sym->ldef;
message(a09,MSG_WARNING,"W0002: symbol '%.*s' defined but not used",sym->name.s,sym->name.text);
}
warning_unused_symbols(a09,tree->right);
}
}
/**************************************************************************/
static void dump_symbols(FILE *out,tree__s *tree)
{
assert(out != NULL);
if (tree != NULL)
{
static char const *const symtypes[] =
{
[SYM_UNDEF] = "undefined",
[SYM_ADDRESS] = "address",
[SYM_EQU] = "equate",
[SYM_SET] = "set",
[SYM_PUBLIC] = "public",
[SYM_EXTERN] = "extern",
};
dump_symbols(out,tree->left);
struct symbol *sym = tree2sym(tree);
if ((sym->type != SYM_SET) && (sym->refs > 0))
{
fprintf(
out,
"%5zu | %-11.11s %04X %5zu %.*s\n",
sym->ldef,
symtypes[sym->type],
sym->value,
sym->refs,
sym->name.s,sym->name.text
);
}
dump_symbols(out,tree->right);
}
}
/**************************************************************************/
static int cleanup(struct a09 *a09,bool success)
{
assert(a09 != NULL);
if (a09->runtests) test_fini(a09);
if (a09->out != NULL) fclose(a09->out);
if (a09->in != NULL) fclose(a09->in);
if (!success)
{
if (a09->listfile) remove(a09->listfile);
remove(a09->outfile);
}
a09->format.fini(&a09->format,a09);
symbol_freetable(a09->symtab);
for (size_t i = 0 ; i < a09->ndeps ; i++)
free(a09->deps[i]);
free(a09->deps);
for (size_t i = 0 ; i < a09->nincs ; i++)
free(a09->includes[i]);
free(a09->includes);
return success ? 0 : 1;
}
/**************************************************************************/
int main(int argc,char *argv[])
{
int fi;
bool rc;
struct a09 a09 =
{
.infile = argv[0],
.outfile = "a09.obj",
.listfile = NULL,
.corefile = NULL,
.tests = NULL,
.deps = NULL,
.includes = NULL,
.ndeps = 0,
.nincs = 0,
.in = NULL,
.out = NULL,
.list = NULL,
.lnum = 0,
.total_cycles = 0,
.symtab = NULL,
.nowarn = {0},
.label = { .s = 0, .text = { '\0' } },
.list_pad = 0,
.pc = 0,
.dp = 0,
.debug = false,
.mkdeps = false,
.obj = true,
.runtests = false,
.rndtests = false,
.tapout = false,
.cc = false,
.cycles = false,
.cycles_detailed = false,
.cycles_total = false,
.inbuf = { .buf = {0}, .widx = 0, .ridx = 0 },
};
format_bin_init(&a09);
fi = parse_command(argc,argv,&a09);
if (fi == -1)
return cleanup(&a09,false);
if (fi == argc)
{
message(&a09,MSG_ERROR,"E0083: no input file specified");
return cleanup(&a09,false);
}
if (a09.runtests)
if (!test_init(&a09))
return cleanup(&a09,false);
a09.infile = add_file_dep(&a09,argv[fi]);