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rmac/rmac.c

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//
// RMAC - Renamed Macro Assembler for all Atari computers
// RMAC.C - Main Application Code
// Copyright (C) 199x Landon Dyer, 2011-2022 Reboot and Friends
// RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
// Source utilised with the kind permission of Landon Dyer
//
#include "rmac.h"
#include "6502.h"
#include "debug.h"
#include "direct.h"
#include "dsp56k.h"
#include "error.h"
#include "expr.h"
#include "listing.h"
#include "mark.h"
#include "macro.h"
#include "object.h"
#include "procln.h"
#include "riscasm.h"
#include "sect.h"
#include "symbol.h"
#include "token.h"
#include "version.h"
int perm_verb_flag; // Permanently verbose, interactive mode
int list_flag; // "-l" listing flag on command line
int list_pag = 1; // Enable listing pagination by default
int verb_flag; // Be verbose about what's going on
int m6502; // 1, assembling 6502 code
int glob_flag; // Assume undefined symbols are global
int lsym_flag; // Include local symbols in object file (ALWAYS true)
int dsym_flag; // Gen debug syms (Requires obj_format = BSD)
int optim_warn_flag; // Warn about possible short branches
int prg_flag; // !=0, produce .PRG executable (2=symbols)
int prg_extend; // !=0, output extended .PRG symbols
int legacy_flag; // Do stuff like insert code in RISC assembler
int obj_format; // Object format flag
int debug; // [1..9] Enable debugging levels
int err_flag; // '-e' specified
int err_fd; // File to write error messages to
int rgpu, rdsp; // Assembling Jaguar GPU or DSP code
int robjproc; // Assembling Jaguar Object Processor code
int dsp56001; // Assembling DSP 56001 code
int list_fd; // File to write listing to
int segpadsize; // Segment padding size
int endian; // Host processor endianess (0 = LE, 1 = BE)
int *regbase; // Points to current DFA register table (base)
int *regtab; // Points to current DFA register table (tab)
int *regcheck; // Points to current DFA register table (check)
int *regaccept; // Points to current DFA register table (accept)
char * objfname; // Object filename pointer
char * firstfname; // First source filename
char * cmdlnexec; // Executable name, pointer to ARGV[0]
char searchpatha[512] = { 0 }; // Buffer to hold searchpath when specified
char * searchpath = NULL; // Search path for include files
char defname[] = "noname.o"; // Default output filename
int optim_flags[OPT_COUNT_ALL] = { 0 }; // Specific optimisations on/off matrix
int activecpu = CPU_68000; // Active 68k CPU (68000 by default)
int activefpu = FPU_NONE; // Active FPU (none by default)
int org68k_active = 0; // .org switch for 68k (only with RAW output format)
uint32_t org68k_address; // .org for 68k
int correctMathRules; // 1, use C operator precedence in expressions
uint32_t used_architectures; // Bitmask that records exactly which architectures were used during assembly
//
// Convert a string to uppercase
//
void strtoupper(char * s)
{
while (*s)
*s++ &= 0xDF;
}
//
// Manipulate file extension.
//
// 'name' must be large enough to hold any possible filename. If 'stripp' is
// nonzero, any old extension is removed. If the file does not already have an
// extension, 'extension' is appended to the filename.
//
char * fext(char * name, char * extension, int stripp)
{
char * s;
// Find beginning of "real" name (strip off path)
char * beg = strrchr(name, SLASHCHAR);
if (beg == NULL)
beg = name;
// Clobber any old extension, if requested
if (stripp)
{
for(s=beg; *s && *s!='.'; ++s)
;
*s = '\0';
}
if (strrchr(beg, '.') == NULL)
strcat(beg, extension);
return name;
}
static int is_sep(char c)
{
const char *seps = PATH_SEPS;
for (seps = PATH_SEPS; *seps; seps++) {
if (*seps == c)
return 1;
}
return 0;
}
//
// Return 'item'nth element of semicolon-seperated pathnames specified in the
// enviroment string 's'. Copy the pathname to 'buf'. Return 0 if the 'item'
// nth path doesn't exist.
//
// ['item' ranges from 0 to N-1, where N = #elements in search path]
//
int nthpath(char * env_var, int itemno, char * buf)
{
char * s = searchpath;
if (s == NULL)
s = getenv(env_var);
if (s == NULL)
return 0;
while (itemno--)
while (*s != EOS && !is_sep(*s++))
;
if (*s == EOS)
return 0;
while (*s != EOS && !is_sep(*s))
*buf++ = *s++;
*buf++ = EOS;
return 1;
}
//
// Display command line help
//
void DisplayHelp(void)
{
printf("Usage:\n"
" %s [options] srcfile\n"
"\n"
"Options:\n"
" -? or -h Display usage information\n"
" -dsymbol[=value] Define symbol (with optional value, default=0)\n"
" -e[errorfile] Send error messages to file, not stdout\n"
" -f[format] Output object file format\n"
" a: ALCYON\n"
" b: BSD (use this for Jaguar)\n"
" c: PRG (C64)\n"
" e: ELF\n"
" p: P56 (use this for DSP56001 only)\n"
" l: LOD (use this for DSP56001 only)\n"
" x: com/exe/xex (Atari 800)\n"
" r: absolute address\n"
" -g Output source level debug information (BSD object only)\n"
" -i[path] Directory to search for include files\n"
" -l[filename] Create an output listing file\n"
" -l*[filename] Create an output listing file without pagination\n"
" -m[cpu] Select default CPU. Available options:\n"
" 68000, 68020, 68030, 68040, 68060, 6502, tom, jerry, 56001\n"
" -n Don't do things behind your back in RISC assembler\n"
" -o file Output file name\n"
" +o[value] Turn a specific optimisation on\n"
" Available optimisation switches:\n"
" o0: Absolute long addresses to word\n"
" o1: move.l #x,dn/an to moveq\n"
" o2: Word branches to short\n"
" o3: Outer displacement 0(an) to (an)\n"
" o4: lea size(An),An to addq #size,An\n"
" o5: 68020+ Absolute long base/outer disp. to word\n"
" o6: Null branches to NOP\n"
" o7: clr.l Dx to moveq #0,Dx\n"
" o8: adda.w/l #x,Dy to addq.w/l #x,Dy\n"
" o9: adda.w/l #x,Ay to lea x(Dy),Ay\n"
" o10: 56001 Use short format for immediate values if possible\n"
" o11: 56001 Auto convert short addressing mode to long (default: on)\n"
" o30: Enforce PC relative (alternative name: op)\n"
" ~o[value] Turn a specific optimisation off\n"
" +oall Turn all optimisations on\n"
" ~oall Turn all optimisations off\n"
" -p Create an ST .prg (without symbols). Forces -fa\n"
" -ps Create an ST .prg (with symbols). Forces -fa\n"
" -px Create an ST .prg (with exsymbols). Forces -fa\n"
" -r[size] Pad segments to boundary size specified\n"
" w: word (2 bytes, default alignment)\n"
" l: long (4 bytes)\n"
" p: phrase (8 bytes)\n"
" d: double phrase (16 bytes)\n"
" q: quad phrase (32 bytes)\n"
" -s Warn about possible short branches\n"
" and applied optimisations\n"
" -u Force referenced and undefined symbols global\n"
" -v Set verbose mode\n"
" -x Turn on debugging mode\n"
" -y[pagelen] Set page line length (default: 61)\n"
" -4 Use C style operator precedence\n"
"\n", cmdlnexec);
}
//
// Display version information
//
void DisplayVersion(void)
{
printf("\n"
" _ __ _ __ ___ __ _ ___ \n"
"| '__| '_ ` _ \\ / _` |/ __|\n"
"| | | | | | | | (_| | (__ \n"
"|_| |_| |_| |_|\\__,_|\\___|\n"
"\nRenamed Macro Assembler\n"
"Copyright (C) 199x Landon Dyer, 2011-2022 Reboot and Friends\n"
"V%01i.%01i.%01i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
}
//
// Parse optimisation options
//
int ParseOptimization(char * optstring)
{
int onoff = 0;
while (*optstring)
{
if (*optstring == '+')
onoff = 1;
else if (*optstring != '~')
return ERROR;
if (optstring[2] == 0)
return error(".opt called with zero arguments");
if ((optstring[2] == 'a' || optstring[2] == 'A')
&& (optstring[3] == 'l' || optstring[3] == 'L')
&& (optstring[4] == 'l' || optstring[4] == 'L'))
{
memset(optim_flags, onoff, OPT_COUNT * sizeof(int));
optstring += 5;
}
else if (optstring[1] == 'o' || optstring[1] == 'O') // Turn on specific optimisation
{
if (optstring[2] == 'p' || optstring[2] == 'P')
{
optim_flags[OPT_PC_RELATIVE] = onoff;
optstring += 3;
}
else
{
int opt_no = atoi(&optstring[2]);
if ((opt_no >= 0) && (opt_no < OPT_COUNT))
{
optim_flags[opt_no] = onoff;
optstring += 3;
// If opt_no is 2 digits then consume an extra character.
// Sounds a bit sleazy but we know we're not going to hit
// more than 100 optimisation switches so this should be
// fine. If we do hit that number then it'll probably be
// time to burn the whole codebase and start from scratch.
if (opt_no > 9)
optstring++;
}
else
return ERROR;
}
}
else
{
return ERROR;
}
if (*optstring == ',')
optstring++;
}
return OK;
}
static void ProcessFile(int fd, char *fname)
{
char *dbgname = fname;
if (NULL == fname)
{
fname = defname; // Kludge first filename
dbgname = "(stdin)";
}
// First file operations:
if (firstfname == NULL)
{
// Record first filename.
firstfname = fname;
// Validate option compatibility
if (dsym_flag)
{
if (obj_format != BSD)
{
printf("-g: debug information only supported with BSD object file format\n");
dsym_flag = 0;
errcnt++;
}
else
{
GenMainFileSym(dbgname);
}
}
}
include(fd, dbgname);
Assemble();
}
extern int reg68base[53];
extern int reg68tab[222];
extern int reg68check[222];
extern int reg68accept[222];
//
// Process command line arguments and do an assembly
//
int Process(int argc, char ** argv)
{
int argno; // Argument number
SYM * sy; // Pointer to a symbol record
char * s; // String pointer
int fd; // File descriptor
char fnbuf[FNSIZ]; // Filename buffer
int i; // Iterator
int current_path_index = 0; // Iterator for search paths
errcnt = 0; // Initialize error count
listing = 0; // Initialize listing level
list_flag = 0; // Initialize listing flag
verb_flag = perm_verb_flag; // Initialize verbose flag
glob_flag = 0; // Initialize .globl flag
optim_warn_flag = 0; // Initialize short branch flag
debug = 0; // Initialize debug flag
objfname = NULL; // Initialize object filename
list_fname = NULL; // Initialize listing filename
err_fname = NULL; // Initialize error filename
obj_format = BSD; // Initialize object format
firstfname = NULL; // Initialize first filename
err_fd = ERROUT; // Initialize error file descriptor
err_flag = 0; // Initialize error flag
rgpu = 0; // Initialize GPU assembly flag
rdsp = 0; // Initialize DSP assembly flag
robjproc = 0; // Initialize OP assembly flag
lsym_flag = 1; // Include local symbols in object file
dsym_flag = 0; // No debug sym generation by default
orgactive = 0; // Not in RISC org section
orgwarning = 0; // No ORG warning issued
segpadsize = 2; // Initialize segment padding size
dsp_orgmap[0].start = 0; // Initialize 56001 org initial address
dsp_orgmap[0].memtype = ORG_P; // Initialize 56001 org start segment
m6502 = 0; // 6502 mode off by default
regbase = reg68base; // Initialise DFA register tables
regtab = reg68tab; // Idem
regcheck = reg68check; // Idem
regaccept = reg68accept; // Idem
correctMathRules = 0; // respect operator precedence
used_architectures = 0; // Initialise used architectures bitfield
// Initialize modules
InitSymbolTable(); // Symbol table
InitTokenizer(); // Tokenizer
InitLineProcessor(); // Line processor
InitExpression(); // Expression analyzer
InitSection(); // Section manager / code generator
InitMark(); // Mark tape-recorder
InitMacro(); // Macro processor
InitListing(); // Listing generator
Init6502(); // 6502 assembler
// Process command line arguments and assemble source files
for(argno=0; argno<argc; argno++)
{
if (*argv[argno] == '-')
{
switch (argv[argno][1])
{
case '4':
correctMathRules = 1;
break;
case 'd': // Define symbol
case 'D':
for(s=argv[argno]+2; *s!=EOS;)
{
if (*s++ == '=')
{
s[-1] = EOS;
break;
}
}
if (argv[argno][2] == EOS)
{
printf("-d: empty symbol\n");
errcnt++;
return errcnt;
}
sy = lookup(argv[argno] + 2, 0, 0);
if (sy == NULL)
{
sy = NewSymbol(argv[argno] + 2, LABEL, 0);
sy->svalue = 0;
}
sy->sattr = DEFINED | EQUATED | ABS;
sy->svalue = (*s ? (uint64_t)atoi(s) : 0);
break;
case 'e': // Redirect error message output
case 'E':
err_fname = argv[argno] + 2;
break;
case 'f': // -f<format>
case 'F':
switch (argv[argno][2])
{
case EOS:
case 'a': // -fa = Alcyon [the default]
case 'A':
obj_format = ALCYON;
break;
case 'b': // -fb = BSD (Jaguar Recommended: 3 out 4 jaguars recommend it!)
case 'B':
obj_format = BSD;
break;
case 'c':
case 'C':
obj_format = C64PRG;
break;
case 'e': // -fe = ELF
case 'E':
obj_format = ELF;
break;
case 'l': // -fl = LOD
case 'L':
obj_format = LOD;
break;
case 'p': // -fp = P56
case 'P':
obj_format = P56;
break;
case 'x': // -fx = COM/EXE/XEX
case 'X':
obj_format = XEX;
break;
case 'r': // -fr = Absolute address
case 'R':
obj_format = RAW;
break;
default:
printf("-f: unknown object format specified\n");
errcnt++;
return errcnt;
}
break;
case 'g': // Debugging flag
case 'G':
dsym_flag = 1;
break;
case 'i': // Set directory search path
case 'I':
{
strcat(searchpatha, argv[argno] + 2);
strcat(searchpatha, ";");
searchpath = searchpatha;
// Check to see if include paths actually exist
char current_path[256];
for(i=current_path_index; nthpath("RMACPATH", i, current_path)!=0; i++)
{
if (strlen(current_path) > 0)
{
DIR * test = opendir(current_path);
if (test == NULL)
{
printf("Invalid include path: %s\n", current_path);
errcnt++;
return errcnt;
}
closedir(test);
}
}
current_path_index = i - 1;
break;
}
case 'l': // Produce listing file
case 'L':
if (*(argv[argno] + 2) == '*')
{
list_fname = argv[argno] + 3;
list_pag = 0; // Special case - turn off pagination
}
else
{
list_fname = argv[argno] + 2;
}
listing = 1;
list_flag = 1;
lnsave++;
break;
case 'm':
case 'M':
if (strcmp(argv[argno] + 2, "68000") == 0)
d_68000();
else if (strcmp(argv[argno] + 2, "68020") == 0)
d_68020();
else if (strcmp(argv[argno] + 2, "68030") == 0)
d_68030();
else if (strcmp(argv[argno] + 2, "68040") == 0)
d_68040();
else if (strcmp(argv[argno] + 2, "68060") == 0)
d_68060();
else if (strcmp(argv[argno] + 2, "68881") == 0)
d_68881();
else if (strcmp(argv[argno] + 2, "68882") == 0)
d_68882();
else if (strcmp(argv[argno] + 2, "56001") == 0)
d_56001();
else if (strcmp(argv[argno] + 2, "6502") == 0)
d_6502();
else if (strcmp(argv[argno] + 2, "tom") == 0)
d_gpu();
else if (strcmp(argv[argno] + 2, "jerry") == 0)
d_dsp();
else
{
printf("Unrecognized CPU '%s'\n", argv[argno] + 2);
errcnt++;
return errcnt;
}
break;
case 'o': // Direct object file output
case 'O':
if (argv[argno][2] != EOS)
objfname = argv[argno] + 2;
else
{
if (++argno >= argc)
{
printf("Missing argument to -o");
errcnt++;
return errcnt;
}
objfname = argv[argno];
}
break;
case 'p': /* -p: generate ".PRG" executable output */
case 'P':
/*
* -p .PRG generation w/o symbols
* -ps .PRG generation with symbols
* -px .PRG generation with extended symbols
*/
switch (argv[argno][2])
{
case EOS:
prg_flag = 1;
break;
case 's':
case 'S':
prg_flag = 2;
break;
case 'x':
case 'X':
prg_flag = 3;
break;
default:
printf("-p: syntax error\n");
errcnt++;
return errcnt;
}
// Enforce Alcyon object format - kind of silly
// to ask for .prg output without it!
obj_format = ALCYON;
break;
case 'r': // Pad seg to requested boundary size
case 'R':
switch(argv[argno][2])
{
case 'w': case 'W': segpadsize = 2; break;
case 'l': case 'L': segpadsize = 4; break;
case 'p': case 'P': segpadsize = 8; break;
case 'd': case 'D': segpadsize = 16; break;
case 'q': case 'Q': segpadsize = 32; break;
default: segpadsize = 2; break; // Effective autoeven();
}
break;
case 's': // Warn about possible short branches and applied optimisations
case 'S':
optim_warn_flag = 1;
break;
case 'u': // Make undefined symbols .globl
case 'U':
glob_flag = 1;
break;
case 'v': // Verbose flag
case 'V':
verb_flag++;
if (verb_flag > 1)
DisplayVersion();
break;
case 'x': // Turn on debugging
case 'X':
debug = 1;
printf("~ Debugging ON\n");
break;
case 'y': // -y<pagelen>
case 'Y':
pagelen = atoi(argv[argno] + 2);
if (pagelen < 10)
{
printf("-y: bad page length\n");
errcnt++;
return errcnt;
}
break;
case EOS: // Input is stdin
ProcessFile(0, NULL);
break;
case 'h': // Display command line usage
case 'H':
case '?':
DisplayVersion();
DisplayHelp();
errcnt++;
break;
case 'n': // Turn off legacy mode
case 'N':
legacy_flag = 0;
printf("Legacy mode OFF\n");
break;
default:
DisplayVersion();
printf("Unknown switch: %s\n\n", argv[argno]);
DisplayHelp();
errcnt++;
break;
}
}
else if (*argv[argno] == '+' || *argv[argno] == '~')
{
if (ParseOptimization(argv[argno]) != OK)
{
DisplayVersion();
printf("Unknown switch: %s\n\n", argv[argno]);
DisplayHelp();
errcnt++;
break;
}
}
else
{
strcpy(fnbuf, argv[argno]);
fext(fnbuf, ".s", 0);
fd = open(fnbuf, 0);
if (fd < 0)
{
printf("Cannot open: %s\n", fnbuf);
errcnt++;
continue;
}
ProcessFile(fd, fnbuf);
}
}
// Wind-up processing;
// o save current section (no more code generation)
// o do auto-even of all sections (or boundary alignment as requested
// through '-r')
// o save the last pc value for 6502 (if we used 6502 at all) and
// detemine if the last section contains anything
// o determine name of object file:
// - "foo.o" for linkable output;
// - "foo.prg" for GEMDOS executable (-p flag).
SaveSection();
int temp_section = cursect;
for(i=TEXT; i<=BSS; i<<=1)
{
SwitchSection(i);
switch(segpadsize)
{
case 2: d_even(); break;
case 4: d_long(); break;
case 8: d_phrase(); break;
case 16: d_dphrase(); break;
case 32: d_qphrase(); break;
}
SaveSection();
}
SwitchSection(M6502);
if (sloc != currentorg[0])
{
currentorg[1] = sloc;
currentorg += 2;
}
// This looks like an awful kludge... !!! FIX !!!
if (temp_section & (M56001P | M56001X | M56001Y))
{
SwitchSection(temp_section);
if (chptr != dsp_currentorg->start)
{
dsp_currentorg->end = chptr;
dsp_currentorg++;
}
}
SwitchSection(TEXT);
if (objfname == NULL)
{
if (firstfname == NULL)
firstfname = defname;
// It's the size of fnbuf minus 5 because of the possible 4 char suffix
// + trailing null (added by fext()).
strncpy(fnbuf, firstfname, sizeof(fnbuf) - 5);
fext(fnbuf, (prg_flag ? ".prg" : ".o"), 1);
objfname = fnbuf;
}
// With one pass finished, go back and:
// (1) run through all the fixups and resolve forward references;
// (1.5) ensure that remaining fixups can be handled by the linker
// (`lo68' format, extended (postfix) format....)
// (2) generate the output file image and symbol table;
// (3) generate relocation information from left-over fixups.
ResolveAllFixups(); // Do all fixups
StopMark(); // Stop mark tape-recorder
if (errcnt == 0)
{
if ((fd = open(objfname, _OPEN_FLAGS, _PERM_MODE)) < 0)
CantCreateFile(objfname);
if (verb_flag)
{
s = (prg_flag ? "executable" : "object");
printf("[Writing %s file: %s]\n", s, objfname);
}
WriteObject(fd);
close(fd);
if (errcnt != 0)
unlink(objfname);
}
if (list_flag)
{
if (verb_flag)
printf("[Wrapping-up listing file]\n");
listing = 1;
symtable();
close(list_fd);
}
if (err_flag)
close(err_fd);
DEBUG dump_everything();
return errcnt;
}
//
// Determine processor endianess
//
int GetEndianess(void)
{
int i = 1;
char * p = (char *)&i;
if (p[0] == 1)
return 0;
return 1;
}
//
// Application entry point
//
int main(int argc, char ** argv)
{
perm_verb_flag = 0; // Clobber "permanent" verbose flag
legacy_flag = 1; // Default is legacy mode on (:-P)
optim_flags[OPT_56K_SHORT] = 1; // This ensures compatibilty with Motorola's 56k assembler
cmdlnexec = argv[0]; // Obtain executable name
endian = GetEndianess(); // Get processor endianess
// If commands were passed in, process them
if (argc > 1)
return Process(argc - 1, argv + 1);
DisplayVersion();
DisplayHelp();
return 0;
}
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