/* -------------------------------------------------------------------------- * machdep.c: Copyright (c) Mark P Jones 1991-1994. All rights reserved. * See goferite.h for details and conditions of use etc... * Gofer version 2.30 March 1994 * * Machine dependent code * RISCOS specific code provided by Bryan Scatergood, JBS * ------------------------------------------------------------------------*/ #if UNIX #include #include #include #include #include #endif #if (TURBOC | BCC) #include #include #include #include #include #include #include extern unsigned _stklen = 8000; /* Allocate an 8k stack segment */ #endif #if (ZTC | WATCOM) #include #include #include #include #include #endif #if DJGPP #include #include #include #include #include #include #include #endif #if RISCOS #include #include #include "swis.h" #include "os.h" #endif #if ATARI #include #include #include #include #endif #if (S_AMISAS | R_AMISAS | L_AMISAS) #include #include #include #include #include #include #include #include #ifndef MACHDEP_RUNTIME __near long __stack = 25000L; unsigned char amigabreak = 0; #endif #endif /* -------------------------------------------------------------------------- * Machine dependent code is used in each of: * - The gofer interpreter MACHDEP_GOFER * - The gofer compiler MACHDEP_GOFC * - The compiler runtime system MACHDEP_RUNTIME * In many cases, the the same code is used in each part. The following * sections of code are enclosed in suitable #if ... #endif directives to * indicate which sections require particular parts of the code. Each of * the three systems above defines one of the three symbols on the right * above as 1 and then #includes this file. The following directives make * sure that the other macros are set to the correct defaults. * ------------------------------------------------------------------------*/ #ifndef MACHDEP_GOFER #define MACHDEP_GOFER 0 #endif #ifndef MACHDEP_GOFC #define MACHDEP_GOFC 0 #endif #ifndef MACHDEP_RUNTIME #define MACHDEP_RUNTIME 0 #endif /* -------------------------------------------------------------------------- * Find information about a file: * ------------------------------------------------------------------------*/ #if (MACHDEP_GOFER | MACHDEP_GOFC) #if RISCOS typedef struct { unsigned hi, lo; } Time; #define timeChanged(now,thn) (now.hi!=thn.hi || now.lo!=thn.lo) #define timeSet(var,tm) var.hi = tm.hi; var.lo = tm.lo #else typedef time_t Time; #define timeChanged(now,thn) (now!=thn) #define timeSet(var,tm) var = tm #endif static Void local getFileInfo Args((String, Time *, Long *)); static Void local getFileInfo(s,tm,sz) /* find time stamp and size of file*/ String s; Time *tm; Long *sz; { #if RISCOS /* get file info for RISCOS -- JBS */ os_regset r; /* RISCOS PRM p.850 and p.837 */ r.r[0] = 17; /* Read catalogue, no path */ r.r[1] = (int)s; os_swi(OS_File, &r); if(r.r[0] == 1 && (r.r[2] & 0xFFF00000) == 0xFFF00000) { tm->hi = r.r[2] & 0xFF; /* Load address (high byte) */ tm->lo = r.r[3]; /* Execution address (low 4 bytes) */ } else /* Not found, or not time-stamped */ tm->hi = tm->lo = 0; *sz = (Long)(r.r[0] == 1 ? r.r[4] : 0); #else /* normally just use stat() */ static struct stat scbuf; stat(s,&scbuf); *tm = scbuf.st_mtime; *sz = (Long)(scbuf.st_size); #endif } #endif #if RISCOS /* RISCOS needs access() */ int access(char *s, int dummy) { /* Give 1 iff cannot access file s */ os_regset r; /* RISCOS PRM p.850 -- JBS */ assert(dummy == 0); r.r[0] = 17; /* Read catalogue, no path */ r.r[1] = (int)s; os_swi(OS_File, &r); return r.r[0] != 1; } int namecmp(char *filename, char *spec){/* For filename extension hacks */ while(*spec) if (tolower(*filename) != *spec++) return 0; else ++filename; return *filename == '.'; } #endif /* -------------------------------------------------------------------------- * Get time/date stamp for inclusion in compiled files: * ------------------------------------------------------------------------*/ #if MACHDEP_GOFC #include String timeString() { /* return time&date string */ time_t clock; /* must end with '\n' character */ time(&clock); return(ctime(&clock)); } #endif /* -------------------------------------------------------------------------- * Garbage collection notification: * ------------------------------------------------------------------------*/ #if (MACHDEP_GOFER | MACHDEP_GOFC) Bool gcMessages = FALSE; /* TRUE => print GC messages */ Void gcStarted() { /* notify garbage collector start */ if (gcMessages) { printf("{{Gc"); fflush(stdout); } } Void gcScanning() { /* notify garbage collector scans */ if (gcMessages) { putchar(':'); fflush(stdout); } } Void gcRecovered(recovered) /* notify garbage collection done */ Int recovered; { if (gcMessages) { printf("%d}}",recovered); fflush(stdout); } } Cell *CStackBase; /* Retain start of C control stack */ #if RISCOS /* Stack traversal for RISCOS */ /* Warning: The following code is specific to the Acorn ARM under RISCOS (and C4). We must explicitly walk back through the stack frames, since the stack is extended from the heap. (see PRM pp. 1757). gcCStack must not be modified, since the offset '5' assumes that only v1 is used inside this function. Hence we do all the real work in gcARM. */ #define spreg 13 /* C3 has SP=R13 */ #define previousFrame(fp) ((int *)((fp)[-3])) #define programCounter(fp) ((int *)((*(fp)-12) & ~0xFC000003)) #define isSubSPSP(w) (((w)&dontCare) == doCare) #define doCare (0xE24DD000) /* SUB r13,r13,#0 */ #define dontCare (~0x00100FFF) /* S and # bits */ #define immediateArg(x) ( ((x)&0xFF) << (((x)&0xF00)>>7) ) static void gcARM(int *fp) { int si = *programCounter(fp); /* Save instruction indicates how */ /* many registers in this frame */ int *regs = fp - 4; if (si & (1<<0)) markWithoutMove(*regs--); if (si & (1<<1)) markWithoutMove(*regs--); if (si & (1<<2)) markWithoutMove(*regs--); if (si & (1<<3)) markWithoutMove(*regs--); if (si & (1<<4)) markWithoutMove(*regs--); if (si & (1<<5)) markWithoutMove(*regs--); if (si & (1<<6)) markWithoutMove(*regs--); if (si & (1<<7)) markWithoutMove(*regs--); if (si & (1<<8)) markWithoutMove(*regs--); if (si & (1<<9)) markWithoutMove(*regs--); if (previousFrame(fp)) { /* The non-register stack space is for the previous frame is above this fp, and not below the previous fp, because of the way stack extension works. It seems the only way of discovering its size is finding the SUB sp, sp, #? instruction by walking through the code following the entry point. */ int *oldpc = programCounter(previousFrame(fp)); int fsize = 0, i; for(i = 1; i < 6; ++i) if(isSubSPSP(oldpc[i])) fsize += immediateArg(oldpc[i]) / 4; for(i=1; i<=fsize; ++i) markWithoutMove(fp[i]); } } void gcCStack() { int dummy; int *fp = 5 + &dummy; while (fp) { gcARM(fp); fp = previousFrame(fp); } } #else /* Garbage collection for standard stack machines */ Void gcCStack() { /* Garbage collect elements off */ Cell stackTop = NIL; /* C stack */ Cell *ptr = &stackTop; #if SMALL_GOFER if (((long)(ptr) - (long)(CStackBase))&1) fatal("gcCStack"); #else if (((long)(ptr) - (long)(CStackBase))&3) fatal("gcCStack"); #endif #define StackGrowsDown while (ptr<=CStackBase) markWithoutMove(*ptr++) #define StackGrowsUp while (ptr>=CStackBase) markWithoutMove(*ptr--) #define GuessDirection if (ptr>CStackBase) StackGrowsUp; else StackGrowsDown #if HPUX GuessDirection; #else StackGrowsDown; #endif #undef StackGrowsDown #undef StackGrowsUp #undef GuessDirection } #endif #endif /* -------------------------------------------------------------------------- * Terminal dependent stuff: * ------------------------------------------------------------------------*/ #if (TERMIO_IO | SGTTY_IO | TERMIOS_IO) #if TERMIO_IO #include typedef struct termio TermParams; #define getTerminal(tp) ioctl(fileno(stdin),TCGETA,&tp) #define setTerminal(tp) ioctl(fileno(stdin),TCSETAF,&tp) #define noEcho(tp) tp.c_lflag &= ~(ICANON | ECHO); \ tp.c_cc[VMIN] = 1; \ tp.c_cc[VTIME] = 0; #endif #if SGTTY_IO #include typedef struct sgttyb TermParams; #define getTerminal(tp) ioctl(fileno(stdin),TIOCGETP,&tp) #define setTerminal(tp) ioctl(fileno(stdin),TIOCSETP,&tp) #if HPUX #define noEcho(tp) tp.sg_flags |= RAW; tp.sg_flags &= (~ECHO); #else #define noEcho(tp) tp.sg_flags |= CBREAK; tp.sg_flags &= (~ECHO); #endif #endif #if TERMIOS_IO #include typedef struct termios TermParams; #define getTerminal(tp) tcgetattr(fileno(stdin), &tp) #define setTerminal(tp) tcsetattr(fileno(stdin), TCSAFLUSH, &tp) #define noEcho(tp) tp.c_lflag &= ~(ICANON | ECHO); \ tp.c_cc[VMIN] = 1; \ tp.c_cc[VTIME] = 0; #endif static Bool messedWithTerminal = FALSE; static TermParams originalSettings; Void normalTerminal() { /* restore terminal initial state */ if (messedWithTerminal) setTerminal(originalSettings); } Void noechoTerminal() { /* set terminal into noecho mode */ TermParams settings; if (!messedWithTerminal) { getTerminal(originalSettings); messedWithTerminal = TRUE; } getTerminal(settings); noEcho(settings); setTerminal(settings); } #if (MACHDEP_GOFER | MACHDEP_GOFC) Int getTerminalWidth() { /* determine width of terminal */ #ifdef TIOCGWINSZ #ifdef _M_UNIX /* SCO Unix 3.2.4 defines TIOCGWINSZ*/ #include /* Required by sys/ptem.h */ #include /* Required to declare winsize */ #endif static struct winsize terminalSize; ioctl(fileno(stdout),TIOCGWINSZ,&terminalSize); return (terminalSize.ws_col==0)? 80 : terminalSize.ws_col; #else return 80; #endif } #endif Int readTerminalChar() { /* read character from terminal */ return getchar(); /* without echo, assuming that */ } /* noechoTerminal() is active... */ #endif #if DOS_IO static Bool terminalEchoReqd = TRUE; #if (MACHDEP_GOFER | MACHDEP_GOFC) #if (S_AMISAS | R_AMISAS | L_AMISAS) Int getTerminalWidth() { int lm, rm; int c; if (amigaIsTrueConsole() && rawcon(1) == 0) { printf("%c%s",0x9B,"0 q"); /* Request window size report. */ /* * Now read the size report. * 1;1;;r */ c = getchar(); for (;;) { if (c != 0x9B) { /* */ c = getchar(); continue; } if (!isdigit(c = getchar())) continue; /* Top margin (not used). */ while (isdigit(c = getchar())) ; if (c != ';') continue; /* ';' seperator. */ if (!isdigit(c = getchar())) continue; /* Left margin. */ lm = c - '0'; while (isdigit(c = getchar())) lm = lm * 10 + c - '0'; if (c != ';') continue; /* ';' seperator. */ if (!isdigit(c = getchar())) continue; /* Bottom margin (not used). */ while (isdigit(c = getchar())) ; if (c != ';') continue; /* ';' seperator. */ if (!isdigit(c = getchar())) continue; /* Right margin. */ rm = c - '0'; while (isdigit(c = getchar())) rm = rm * 10 + c - '0'; if (c != ' ') continue; /* " r" terminator. */ if ((c = getchar()) != 'r') continue; break; } if (terminalEchoReqd) rawcon(0); return rm - lm + 1; } else return 77; /* Anybody's guess... */ } #else Int getTerminalWidth() { /* PC screen is fixed 80 chars */ return 80; } #endif #endif #if (S_AMISAS | R_AMISAS | L_AMISAS) Void normalTerminal() { /* restore terminal initial state */ terminalEchoReqd = TRUE; rawcon(0); } Void noechoTerminal() { /* turn terminal echo on/off */ terminalEchoReqd = FALSE; rawcon(1); } Int readTerminalChar() { /* read character from terminal */ Int c = getchar(); /* * This circumvents a problem with * Gofer code like 'run (map toUpper)' */ if (c == 3) { /* Ctrl-C is swallowed raw */ normalTerminal(); /* turn echo on */ raise(SIGINT); c = '\n'; /* is this reasonable? */ } return c=='\r' ? '\n' : c; } #else Void normalTerminal() { /* restore terminal initial state */ terminalEchoReqd = TRUE; } Void noechoTerminal() { /* turn terminal echo on/off */ terminalEchoReqd = FALSE; } Int readTerminalChar() { /* read character from terminal */ if (terminalEchoReqd) return getchar(); else { Int c = getch(); return c=='\r' ? '\n' : c; } } #endif #if RISCOS #if (MACHDEP_GOFER | MACHDEP_GOFC) Int getTerminalWidth() { int dummy, width; (void) os_swi3r(OS_ReadModeVariable, -1, 1, 0, &dummy, &dummy, &width); return width+1; } #endif Void normalTerminal() { /* restore terminal initial state */ } /* (not yet implemented) */ Void noechoTerminal() { /* turn terminal echo on/off */ } /* (not yet implemented) */ Int readTerminalChar() { /* read character from terminal */ return getchar(); } #endif /* -------------------------------------------------------------------------- * Interrupt handling: * ------------------------------------------------------------------------*/ #if (MACHDEP_GOFER | MACHDEP_GOFC) /* runtime.c provides own version */ static Bool broken = FALSE; static Bool breakReqd = FALSE; static sigProto(ignoreBreak); Bool breakOn(reqd) /* set break trapping on if reqd, */ Bool reqd; { /* or off otherwise, returning old */ Bool old = breakReqd; breakReqd = reqd; if (reqd) { if (broken) { /* repond to break signal received */ broken = FALSE; /* whilst break trap disabled */ sigRaise(breakHandler); } ctrlbrk(breakHandler); } else ctrlbrk(ignoreBreak); return old; } static sigHandler(ignoreBreak) { /* record but don't respond to break*/ ctrlbrk(ignoreBreak); broken = TRUE; sigResume; } #endif /* -------------------------------------------------------------------------- * Shell escapes: * ------------------------------------------------------------------------*/ #if MACHDEP_GOFER Int shellEsc(s) /* run a shell command (or shell) */ String s; { #if UNIX if (s[0]=='\0') s = fromEnv("SHELL","/bin/sh"); #endif return system(s); } #if RISCOS /* RISCOS also needs a chdir() */ int chdir(char *s) { /* RISCOS PRM p. 885 -- JBS */ return os_swi2(OS_FSControl + XOS_Bit, 0, (int)s) != NULL; } #endif #endif /* -------------------------------------------------------------------------- * Floating point support: * ------------------------------------------------------------------------*/ #if HAS_FLOATS #if BREAK_FLOATS static union { Float flVal; struct { Cell flPart1,flPart2; } clVal; } fudgeCoerce; Cell part1Float(fl) FloatPro fl; { fudgeCoerce.flVal = fl; return fudgeCoerce.clVal.flPart1; } Cell part2Float(fl) FloatPro fl; { fudgeCoerce.flVal = fl; return fudgeCoerce.clVal.flPart2; } FloatPro floatFromParts(c1,c2) Cell c1, c2; { fudgeCoerce.clVal.flPart1 = c1; fudgeCoerce.clVal.flPart2 = c2; return fudgeCoerce.flVal; } Cell mkFloat(fl) FloatPro fl; { Cell p1,p2; fudgeCoerce.flVal = fl; p1 = mkInt(fudgeCoerce.clVal.flPart1); p2 = mkInt(fudgeCoerce.clVal.flPart2); return pair(FLOATCELL,pair(p1,p2)); } FloatPro floatOf(c) Cell c; { fudgeCoerce.clVal.flPart1 = intOf(fst(snd(c))); fudgeCoerce.clVal.flPart2 = intOf(snd(snd(c))); return fudgeCoerce.flVal; } #if MACHDEP_RUNTIME & BREAK_FLOATS Cell safeMkFloat(fl) FloatPro fl; { fudgeCoerce.flVal = fl; needStack(2); pushInt(fudgeCoerce.clVal.flPart2); pushInt(fudgeCoerce.clVal.flPart1); heap(2); mkap(); topfun(FLOATCELL); return pop(); } #endif #else /* !BREAK_FLOATS */ static union { Float flVal; Cell clVal; } fudgeCoerce; Cell mkFloat(fl) FloatPro fl; { fudgeCoerce.flVal = fl; return pair(FLOATCELL,fudgeCoerce.clVal); } FloatPro floatOf(c) Cell c; { fudgeCoerce.clVal = snd(c); return fudgeCoerce.flVal; } #endif String floatToString(fl) /* Make sure that floating */ FloatPro fl; { /* point values print out in */ static char buffer1[32]; /* a form in which they could*/ static char buffer2[32]; /* also be entered as floats */ Int i=0, j=0; sprintf(buffer1,FloatFMT,fl); while (buffer1[i] && strchr("eE.",buffer1[i])==0) buffer2[j++] = buffer1[i++]; if (buffer1[i]!='.') { buffer2[j++] = '.'; buffer2[j++] = '0'; } while (buffer2[j++]=buffer1[i++]) ; return buffer2; } FloatPro stringToFloat(s) String s; { return atof(s); } #else Cell mkFloat(fl) FloatPro fl; { internal("mkFloat"); return 0;/*NOTREACHED*/ } FloatPro floatOf(c) Cell c; { internal("floatOf"); return 0;/*NOTREACHED*/ } String floatToString(fl) FloatPro fl; { internal("floatToString"); return "";/*NOTREACHED*/ } FloatPro stringToFloat(s) String s; { internal("stringToFloat"); return 0; } #endif /* -------------------------------------------------------------------------- * Machine dependent control: * ------------------------------------------------------------------------*/ #if (MACHDEP_GOFER | MACHDEP_GOFC) #if UNIX static sigHandler(panic) { /* exit in a panic, on receipt of */ everybody(EXIT); /* an unexpected signal */ fprintf(stderr,"Unexpected signal\n"); exit(1); sigResume;/*NOTREACHED*/ } #endif Void machdep(what) /* Handle machine specific */ Int what; { /* initialisation etc.. */ switch (what) { case MARK : break; #if UNIX case INSTALL : #ifdef SIGHUP signal(SIGHUP,panic); #endif #ifdef SIGQUIT signal(SIGQUIT,panic); #endif #ifdef SIGTERM signal(SIGTERM,panic); #endif #ifdef SIGSEGV signal(SIGSEGV,panic); #endif #ifdef SIGBUS signal(SIGBUS,panic); #endif break; #endif case RESET : case BREAK : case EXIT : normalTerminal(); break; } } #endif /*-------------------------------------------------------------------------*/