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rmac
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rmac/rmac.c

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//
// RMAC - Reboot's Macro Assembler for all Atari computers
// RMAC.C - Main Application Code
// Copyright (C) 199x Landon Dyer, 2011-2019 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 "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 as68_flag; // as68 kludge mode
int glob_flag; // Assume undefined symbols are global
int lsym_flag; // Include local symbols in object file
int sbra_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 regbank; // RISC register bank
int segpadsize; // Segment padding size
int endian; // Host processor endianess (0 = LE, 1 = BE)
char * objfname; // Object filename pointer
char * firstfname; // First source filename
char * cmdlnexec; // Executable name, pointer to ARGV[0]
char * searchpath; // Search path for include files
char defname[] = "noname.o"; // Default output filename
int optim_flags[OPT_COUNT]; // Specific optimisations on/off matrix
int activecpu = CPU_68000; // Active 68k CPU (68000 by default)
int activefpu = FPU_NONE; // Active FPU (none by default)
//
// 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;
}
//
// 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 && *s++ != ';')
;
if (*s == EOS)
return 0;
while (*s != EOS && *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 (use this for ST)\n"
" b: BSD (use this for Jaguar)\n"
" e: ELF\n"
" x: com/exe/xex (Atari 800)\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\n"
" 68020\n"
" 68030\n"
" 68040\n"
" 68060\n"
" 6502\n"
" tom\n"
" jerry\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 values and default settings:\n"
" o0: Absolute long adddresses to word (on)\n"
" o1: move.l #x,dn/an to moveq (on)\n"
" o2: Word branches to short (on)\n"
" o3: Outer displacement 0(an) to (an) (off)\n"
" o4: lea size(An),An to addq #size,An (off)\n"
" o5: Absolute long base displacement to word (off)\n"
" o6: Null branches to NOP (off)\n"
" o7: clr.l Dx to moveq #0,Dx (off)\n"
" o8: adda.w/l #x,Dy to addq.w/l #x,Dy (off)\n"
" o9: adda.w/l #x,Dy to lea x(Dy),Dy (off)\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)\n"
" -ps Create an ST .prg (with symbols)\n"
" -px Create an ST .prg (with exsymbols)\n"
" 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"
"\n", cmdlnexec);
}
//
// Display version information
//
void DisplayVersion(void)
{
printf("\n"
" _ __ _ __ ___ __ _ ___ \n"
"| '__| '_ ` _ \\ / _` |/ __|\n"
"| | | | | | | | (_| | (__ \n"
"|_| |_| |_| |_|\\__,_|\\___|\n"
"\nReboot's Macro Assembler\n"
"Copyright (C) 199x Landon Dyer, 2011-2018 Reboot\n"
"V%01i.%01i.%01i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
}
//
// Parse optimisation options
//
int ParseOptimization(char * optstring)
{
int onoff = 0;
if (*optstring == '+')
onoff = 1;
else if (*optstring != '~')
return ERROR;
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));
return OK;
}
else if (optstring[1] == 'o' || optstring[1] == 'O') // Turn on specific optimisation
{
int opt_no = atoi(&optstring[2]);
if ((opt_no >= 0) && (opt_no < OPT_COUNT))
{
optim_flags[opt_no] = onoff;
return OK;
}
else
return ERROR;
}
else
{
return ERROR;
}
}
//
// 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
errcnt = 0; // Initialise error count
listing = 0; // Initialise listing level
list_flag = 0; // Initialise listing flag
verb_flag = perm_verb_flag; // Initialise verbose flag
as68_flag = 0; // Initialise as68 kludge mode
glob_flag = 0; // Initialise .globl flag
sbra_flag = 0; // Initialise short branch flag
debug = 0; // Initialise debug flag
searchpath = NULL; // Initialise search path
objfname = NULL; // Initialise object filename
list_fname = NULL; // Initialise listing filename
err_fname = NULL; // Initialise error filename
obj_format = BSD; // Initialise object format
firstfname = NULL; // Initialise first filename
err_fd = ERROUT; // Initialise error file descriptor
err_flag = 0; // Initialise error flag
rgpu = 0; // Initialise GPU assembly flag
rdsp = 0; // Initialise DSP assembly flag
robjproc = 0; // Initialise OP assembly flag
lsym_flag = 1; // Include local symbols in object file
regbank = BANK_N; // No RISC register bank specified
orgactive = 0; // Not in RISC org section
orgwarning = 0; // No ORG warning issued
segpadsize = 2; // Initialise segment padding size
m6502 = 0; // 6502 mode off by default
// Initialise 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 '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 'e': // -fe = ELF
case 'E':
obj_format = ELF;
break;
case 'x': // -fx = COM/EXE/XEX
case 'X':
obj_format = XEX;
break;
default:
printf("-f: unknown object format specified\n");
errcnt++;
return errcnt;
}
break;
case 'g': // Debugging flag
case 'G':
printf("Debugging flag (-g) not yet implemented\n");
break;
case 'i': // Set directory search path
case 'I':
searchpath = argv[argno] + 2;
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
case 'S':
sbra_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
if (firstfname == NULL) // Kludge first filename
firstfname = defname;
include(0, "(stdin)");
Assemble();
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
{
// Record first filename.
if (firstfname == NULL)
firstfname = argv[argno];
strcpy(fnbuf, argv[argno]);
fext(fnbuf, ".s", 0);
fd = open(fnbuf, 0);
if (fd < 0)
{
printf("Cannot open: %s\n", fnbuf);
errcnt++;
continue;
}
include(fd, fnbuf);
Assemble();
}
}
// 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();
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;
}
if (objfname == NULL)
{
if (firstfname == NULL)
firstfname = defname;
strcpy(fnbuf, firstfname);
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)
cantcreat(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)
// Set legacy optimisation flags to on and everything else to off
memset(optim_flags, 0, OPT_COUNT * sizeof(int));
optim_flags[OPT_ABS_SHORT] =
optim_flags[OPT_MOVEL_MOVEQ] =
optim_flags[OPT_BSR_BCC_S] = 1;
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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