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- #define EXTERN
- #include "l.h"
- #include <ar.h>
- #ifndef DEFAULT
- #define DEFAULT '9'
- #endif
- char *noname = "<none>";
- char symname[] = SYMDEF;
- char thechar = '5';
- char *thestring = "arm";
- char** libdir;
- int nlibdir = 0;
- static int maxlibdir = 0;
- /*
- * -H0 no header
- * -H1 -T0x10005000 -R4 is aif for risc os
- * -H2 -T4128 -R4096 is plan9 format
- * -H3 -T0xF0000020 -R4 is NetBSD format
- * -H4 is IXP1200 (raw)
- * -H5 -T0xC0008010 -R1024 is ipaq
- * -H6 -R4096 no header with segments padded to pages
- * -H7 is elf
- */
- void
- usage(void)
- {
- diag("usage: 6l [-options] objects");
- errorexit();
- }
- static int
- isobjfile(char *f)
- {
- int n, v;
- Biobuf *b;
- char buf1[5], buf2[SARMAG];
- b = Bopen(f, OREAD);
- if(b == nil)
- return 0;
- n = Bread(b, buf1, 5);
- if(n == 5 && (buf1[2] == 1 && buf1[3] == '<' || buf1[3] == 1 && buf1[4] == '<'))
- v = 1; /* good enough for our purposes */
- else{
- Bseek(b, 0, 0);
- n = Bread(b, buf2, SARMAG);
- v = n == SARMAG && strncmp(buf2, ARMAG, SARMAG) == 0;
- }
- Bterm(b);
- return v;
- }
- void
- main(int argc, char *argv[])
- {
- int c;
- char *a;
- char name[LIBNAMELEN];
- Binit(&bso, 1, OWRITE);
- cout = -1;
- listinit();
- outfile = 0;
- nerrors = 0;
- curtext = P;
- HEADTYPE = -1;
- INITTEXT = -1;
- INITDAT = -1;
- INITRND = -1;
- INITENTRY = 0;
- ARGBEGIN {
- default:
- c = ARGC();
- if(c >= 0 && c < sizeof(debug))
- debug[c]++;
- break;
- case 'o':
- outfile = ARGF();
- break;
- case 'E':
- a = ARGF();
- if(a)
- INITENTRY = a;
- break;
- case 'L':
- addlibpath(EARGF(usage()));
- break;
- case 'T':
- a = ARGF();
- if(a)
- INITTEXT = atolwhex(a);
- break;
- case 'D':
- a = ARGF();
- if(a)
- INITDAT = atolwhex(a);
- break;
- case 'R':
- a = ARGF();
- if(a)
- INITRND = atolwhex(a);
- break;
- case 'H':
- a = ARGF();
- if(a)
- HEADTYPE = atolwhex(a);
- /* do something about setting INITTEXT */
- break;
- case 'x': /* produce export table */
- doexp = 1;
- if(argv[1] != nil && argv[1][0] != '-' && !isobjfile(argv[1]))
- readundefs(ARGF(), SEXPORT);
- break;
- case 'u': /* produce dynamically loadable module */
- dlm = 1;
- if(argv[1] != nil && argv[1][0] != '-' && !isobjfile(argv[1]))
- readundefs(ARGF(), SIMPORT);
- break;
- } ARGEND
- USED(argc);
- if(*argv == 0)
- usage();
- if(!debug['9'] && !debug['U'] && !debug['B'])
- debug[DEFAULT] = 1;
- a = getenv("ccroot");
- if(a != nil && *a != '\0') {
- if(!fileexists(a)) {
- diag("nonexistent $ccroot: %s", a);
- errorexit();
- }
- }else
- a = "";
- snprint(name, sizeof(name), "%s/%s/lib", a, thestring);
- addlibpath(name);
- if(HEADTYPE == -1) {
- if(debug['U'])
- HEADTYPE = 0;
- if(debug['B'])
- HEADTYPE = 1;
- if(debug['9'])
- HEADTYPE = 2;
- }
- switch(HEADTYPE) {
- default:
- diag("unknown -H option");
- errorexit();
- case 0: /* no header */
- case 6: /* no header, padded segments */
- HEADR = 0L;
- if(INITTEXT == -1)
- INITTEXT = 0;
- if(INITDAT == -1)
- INITDAT = 0;
- if(INITRND == -1)
- INITRND = 4;
- break;
- case 1: /* aif for risc os */
- HEADR = 128L;
- if(INITTEXT == -1)
- INITTEXT = 0x10005000 + HEADR;
- if(INITDAT == -1)
- INITDAT = 0;
- if(INITRND == -1)
- INITRND = 4;
- break;
- case 2: /* plan 9 */
- HEADR = 32L;
- if(INITTEXT == -1)
- INITTEXT = 4128;
- if(INITDAT == -1)
- INITDAT = 0;
- if(INITRND == -1)
- INITRND = 4096;
- break;
- case 3: /* boot for NetBSD */
- HEADR = 32L;
- if(INITTEXT == -1)
- INITTEXT = 0xF0000020L;
- if(INITDAT == -1)
- INITDAT = 0;
- if(INITRND == -1)
- INITRND = 4096;
- break;
- case 4: /* boot for IXP1200 */
- HEADR = 0L;
- if(INITTEXT == -1)
- INITTEXT = 0x0;
- if(INITDAT == -1)
- INITDAT = 0;
- if(INITRND == -1)
- INITRND = 4;
- break;
- case 5: /* boot for ipaq */
- HEADR = 16L;
- if(INITTEXT == -1)
- INITTEXT = 0xC0008010;
- if(INITDAT == -1)
- INITDAT = 0;
- if(INITRND == -1)
- INITRND = 1024;
- break;
- case 7: /* elf executable */
- HEADR = rnd(52L+3*32L, 16);
- if(INITTEXT == -1)
- INITTEXT = 4096+HEADR;
- if(INITDAT == -1)
- INITDAT = 0;
- if(INITRND == -1)
- INITRND = 4;
- break;
- }
- if(INITDAT != 0 && INITRND != 0)
- print("warning: -D0x%lux is ignored because of -R0x%lux\n",
- INITDAT, INITRND);
- if(debug['v'])
- Bprint(&bso, "HEADER = -H0x%d -T0x%lux -D0x%lux -R0x%lux\n",
- HEADTYPE, INITTEXT, INITDAT, INITRND);
- Bflush(&bso);
- zprg.as = AGOK;
- zprg.scond = 14;
- zprg.reg = NREG;
- zprg.from.name = D_NONE;
- zprg.from.type = D_NONE;
- zprg.from.reg = NREG;
- zprg.to = zprg.from;
- buildop();
- histgen = 0;
- textp = P;
- datap = P;
- pc = 0;
- dtype = 4;
- if(outfile == 0)
- outfile = "5.out";
- cout = create(outfile, 1, 0775);
- if(cout < 0) {
- diag("cannot create %s: %r", outfile);
- errorexit();
- }
- nuxiinit();
- version = 0;
- cbp = buf.cbuf;
- cbc = sizeof(buf.cbuf);
- firstp = prg();
- lastp = firstp;
- if(INITENTRY == 0) {
- INITENTRY = "_main";
- if(debug['p'])
- INITENTRY = "_mainp";
- if(!debug['l'])
- lookup(INITENTRY, 0)->type = SXREF;
- } else if(!(*INITENTRY >= '0' && *INITENTRY <= '9'))
- lookup(INITENTRY, 0)->type = SXREF;
- while(*argv)
- objfile(*argv++);
- if(!debug['l'])
- loadlib();
- firstp = firstp->link;
- if(firstp == P)
- goto out;
- if(doexp || dlm){
- EXPTAB = "_exporttab";
- zerosig(EXPTAB);
- zerosig("etext");
- zerosig("edata");
- zerosig("end");
- if(dlm){
- initdiv();
- import();
- HEADTYPE = 2;
- INITTEXT = INITDAT = 0;
- INITRND = 8;
- INITENTRY = EXPTAB;
- }
- else
- divsig();
- export();
- }
- patch();
- if(debug['p'])
- if(debug['1'])
- doprof1();
- else
- doprof2();
- dodata();
- follow();
- if(firstp == P)
- goto out;
- noops();
- span();
- asmb();
- undef();
- out:
- if(debug['v']) {
- Bprint(&bso, "%5.2f cpu time\n", cputime());
- Bprint(&bso, "%ld memory used\n", thunk);
- Bprint(&bso, "%d sizeof adr\n", sizeof(Adr));
- Bprint(&bso, "%d sizeof prog\n", sizeof(Prog));
- }
- Bflush(&bso);
- errorexit();
- }
- void
- addlibpath(char *arg)
- {
- char **p;
- if(nlibdir >= maxlibdir) {
- if(maxlibdir == 0)
- maxlibdir = 8;
- else
- maxlibdir *= 2;
- p = malloc(maxlibdir*sizeof(*p));
- if(p == nil) {
- diag("out of memory");
- errorexit();
- }
- memmove(p, libdir, nlibdir*sizeof(*p));
- free(libdir);
- libdir = p;
- }
- libdir[nlibdir++] = strdup(arg);
- }
- char*
- findlib(char *file)
- {
- int i;
- char name[LIBNAMELEN];
- for(i = 0; i < nlibdir; i++) {
- snprint(name, sizeof(name), "%s/%s", libdir[i], file);
- if(fileexists(name))
- return libdir[i];
- }
- return nil;
- }
- void
- loadlib(void)
- {
- int i;
- long h;
- Sym *s;
- loop:
- xrefresolv = 0;
- for(i=0; i<libraryp; i++) {
- if(debug['v'])
- Bprint(&bso, "%5.2f autolib: %s\n", cputime(), library[i]);
- objfile(library[i]);
- }
- if(xrefresolv)
- for(h=0; h<nelem(hash); h++)
- for(s = hash[h]; s != S; s = s->link)
- if(s->type == SXREF)
- goto loop;
- }
- void
- errorexit(void)
- {
- if(nerrors) {
- if(cout >= 0)
- remove(outfile);
- exits("error");
- }
- exits(0);
- }
- void
- objfile(char *file)
- {
- long off, esym, cnt, l;
- int f, work;
- Sym *s;
- char magbuf[SARMAG];
- char name[LIBNAMELEN], pname[LIBNAMELEN];
- struct ar_hdr arhdr;
- char *e, *start, *stop;
- if(debug['v'])
- Bprint(&bso, "%5.2f ldobj: %s\n", cputime(), file);
- Bflush(&bso);
- if(file[0] == '-' && file[1] == 'l') {
- snprint(pname, sizeof(pname), "lib%s.a", file+2);
- e = findlib(pname);
- if(e == nil) {
- diag("cannot find library: %s", file);
- errorexit();
- }
- snprint(name, sizeof(name), "%s/%s", e, pname);
- file = name;
- }
- f = open(file, 0);
- if(f < 0) {
- diag("cannot open %s: %r", file);
- errorexit();
- }
- l = read(f, magbuf, SARMAG);
- if(l != SARMAG || strncmp(magbuf, ARMAG, SARMAG)){
- /* load it as a regular file */
- l = seek(f, 0L, 2);
- seek(f, 0L, 0);
- ldobj(f, l, file);
- close(f);
- return;
- }
- if(debug['v'])
- Bprint(&bso, "%5.2f ldlib: %s\n", cputime(), file);
- l = read(f, &arhdr, SAR_HDR);
- if(l != SAR_HDR) {
- diag("%s: short read on archive file symbol header", file);
- goto out;
- }
- if(strncmp(arhdr.name, symname, strlen(symname))) {
- diag("%s: first entry not symbol header", file);
- goto out;
- }
- esym = SARMAG + SAR_HDR + atolwhex(arhdr.size);
- off = SARMAG + SAR_HDR;
- /*
- * just bang the whole symbol file into memory
- */
- seek(f, off, 0);
- cnt = esym - off;
- start = malloc(cnt + 10);
- cnt = read(f, start, cnt);
- if(cnt <= 0){
- close(f);
- return;
- }
- stop = &start[cnt];
- memset(stop, 0, 10);
- work = 1;
- while(work){
- if(debug['v'])
- Bprint(&bso, "%5.2f library pass: %s\n", cputime(), file);
- Bflush(&bso);
- work = 0;
- for(e = start; e < stop; e = strchr(e+5, 0) + 1) {
- s = lookup(e+5, 0);
- if(s->type != SXREF)
- continue;
- sprint(pname, "%s(%s)", file, s->name);
- if(debug['v'])
- Bprint(&bso, "%5.2f library: %s\n", cputime(), pname);
- Bflush(&bso);
- l = e[1] & 0xff;
- l |= (e[2] & 0xff) << 8;
- l |= (e[3] & 0xff) << 16;
- l |= (e[4] & 0xff) << 24;
- seek(f, l, 0);
- l = read(f, &arhdr, SAR_HDR);
- if(l != SAR_HDR)
- goto bad;
- if(strncmp(arhdr.fmag, ARFMAG, sizeof(arhdr.fmag)))
- goto bad;
- l = atolwhex(arhdr.size);
- ldobj(f, l, pname);
- if(s->type == SXREF) {
- diag("%s: failed to load: %s", file, s->name);
- errorexit();
- }
- work = 1;
- xrefresolv = 1;
- }
- }
- return;
- bad:
- diag("%s: bad or out of date archive", file);
- out:
- close(f);
- }
- int
- zaddr(uchar *p, Adr *a, Sym *h[])
- {
- int i, c;
- int l;
- Sym *s;
- Auto *u;
- c = p[2];
- if(c < 0 || c > NSYM){
- print("sym out of range: %d\n", c);
- p[0] = ALAST+1;
- return 0;
- }
- a->type = p[0];
- a->reg = p[1];
- a->sym = h[c];
- a->name = p[3];
- c = 4;
- if(a->reg < 0 || a->reg > NREG) {
- print("register out of range %d\n", a->reg);
- p[0] = ALAST+1;
- return 0; /* force real diagnostic */
- }
- switch(a->type) {
- default:
- print("unknown type %d\n", a->type);
- p[0] = ALAST+1;
- return 0; /* force real diagnostic */
- case D_NONE:
- case D_REG:
- case D_FREG:
- case D_PSR:
- case D_FPCR:
- break;
- case D_REGREG:
- a->offset = p[4];
- c++;
- break;
- case D_BRANCH:
- case D_OREG:
- case D_CONST:
- case D_OCONST:
- case D_SHIFT:
- a->offset = p[4] | (p[5]<<8) |
- (p[6]<<16) | (p[7]<<24);
- c += 4;
- break;
- case D_SCONST:
- while(nhunk < NSNAME)
- gethunk();
- a->sval = (char*)hunk;
- nhunk -= NSNAME;
- hunk += NSNAME;
- memmove(a->sval, p+4, NSNAME);
- c += NSNAME;
- break;
- case D_FCONST:
- while(nhunk < sizeof(Ieee))
- gethunk();
- a->ieee = (Ieee*)hunk;
- nhunk -= NSNAME;
- hunk += NSNAME;
- a->ieee->l = p[4] | (p[5]<<8) |
- (p[6]<<16) | (p[7]<<24);
- a->ieee->h = p[8] | (p[9]<<8) |
- (p[10]<<16) | (p[11]<<24);
- c += 8;
- break;
- }
- s = a->sym;
- if(s == S)
- return c;
- i = a->name;
- if(i != D_AUTO && i != D_PARAM)
- return c;
- l = a->offset;
- for(u=curauto; u; u=u->link)
- if(u->asym == s)
- if(u->type == i) {
- if(u->aoffset > l)
- u->aoffset = l;
- return c;
- }
- while(nhunk < sizeof(Auto))
- gethunk();
- u = (Auto*)hunk;
- nhunk -= sizeof(Auto);
- hunk += sizeof(Auto);
- u->link = curauto;
- curauto = u;
- u->asym = s;
- u->aoffset = l;
- u->type = i;
- return c;
- }
- void
- addlib(char *obj)
- {
- char fn1[LIBNAMELEN], fn2[LIBNAMELEN], comp[LIBNAMELEN], *p, *name;
- int i, search;
- if(histfrogp <= 0)
- return;
- name = fn1;
- search = 0;
- if(histfrog[0]->name[1] == '/') {
- sprint(name, "");
- i = 1;
- } else if(histfrog[0]->name[1] == '.') {
- sprint(name, ".");
- i = 0;
- } else {
- sprint(name, "");
- i = 0;
- search = 1;
- }
- for(; i<histfrogp; i++) {
- snprint(comp, sizeof comp, histfrog[i]->name+1);
- for(;;) {
- p = strstr(comp, "$O");
- if(p == 0)
- break;
- memmove(p+1, p+2, strlen(p+2)+1);
- p[0] = thechar;
- }
- for(;;) {
- p = strstr(comp, "$M");
- if(p == 0)
- break;
- if(strlen(comp)+strlen(thestring)-2+1 >= sizeof comp) {
- diag("library component too long");
- return;
- }
- memmove(p+strlen(thestring), p+2, strlen(p+2)+1);
- memmove(p, thestring, strlen(thestring));
- }
- if(strlen(fn1) + strlen(comp) + 3 >= sizeof(fn1)) {
- diag("library component too long");
- return;
- }
- if(i > 0 || !search)
- strcat(fn1, "/");
- strcat(fn1, comp);
- }
- cleanname(name);
- if(search){
- p = findlib(name);
- if(p != nil){
- snprint(fn2, sizeof(fn2), "%s/%s", p, name);
- name = fn2;
- }
- }
- for(i=0; i<libraryp; i++)
- if(strcmp(name, library[i]) == 0)
- return;
- if(libraryp == nelem(library)){
- diag("too many autolibs; skipping %s", name);
- return;
- }
- p = malloc(strlen(name) + 1);
- strcpy(p, name);
- library[libraryp] = p;
- p = malloc(strlen(obj) + 1);
- strcpy(p, obj);
- libraryobj[libraryp] = p;
- libraryp++;
- }
- void
- addhist(long line, int type)
- {
- Auto *u;
- Sym *s;
- int i, j, k;
- u = malloc(sizeof(Auto));
- s = malloc(sizeof(Sym));
- s->name = malloc(2*(histfrogp+1) + 1);
- u->asym = s;
- u->type = type;
- u->aoffset = line;
- u->link = curhist;
- curhist = u;
- j = 1;
- for(i=0; i<histfrogp; i++) {
- k = histfrog[i]->value;
- s->name[j+0] = k>>8;
- s->name[j+1] = k;
- j += 2;
- }
- }
- void
- histtoauto(void)
- {
- Auto *l;
- while(l = curhist) {
- curhist = l->link;
- l->link = curauto;
- curauto = l;
- }
- }
- void
- collapsefrog(Sym *s)
- {
- int i;
- /*
- * bad encoding of path components only allows
- * MAXHIST components. if there is an overflow,
- * first try to collapse xxx/..
- */
- for(i=1; i<histfrogp; i++)
- if(strcmp(histfrog[i]->name+1, "..") == 0) {
- memmove(histfrog+i-1, histfrog+i+1,
- (histfrogp-i-1)*sizeof(histfrog[0]));
- histfrogp--;
- goto out;
- }
- /*
- * next try to collapse .
- */
- for(i=0; i<histfrogp; i++)
- if(strcmp(histfrog[i]->name+1, ".") == 0) {
- memmove(histfrog+i, histfrog+i+1,
- (histfrogp-i-1)*sizeof(histfrog[0]));
- goto out;
- }
- /*
- * last chance, just truncate from front
- */
- memmove(histfrog+0, histfrog+1,
- (histfrogp-1)*sizeof(histfrog[0]));
- out:
- histfrog[histfrogp-1] = s;
- }
- void
- nopout(Prog *p)
- {
- p->as = ANOP;
- p->from.type = D_NONE;
- p->to.type = D_NONE;
- }
- uchar*
- readsome(int f, uchar *buf, uchar *good, uchar *stop, int max)
- {
- int n;
- n = stop - good;
- memmove(buf, good, stop - good);
- stop = buf + n;
- n = MAXIO - n;
- if(n > max)
- n = max;
- n = read(f, stop, n);
- if(n <= 0)
- return 0;
- return stop + n;
- }
- void
- ldobj(int f, long c, char *pn)
- {
- long ipc;
- Prog *p, *t;
- uchar *bloc, *bsize, *stop;
- Sym *h[NSYM], *s, *di;
- int v, o, r, skip;
- ulong sig;
- static int files;
- static char **filen;
- char **nfilen;
- if((files&15) == 0){
- nfilen = malloc((files+16)*sizeof(char*));
- memmove(nfilen, filen, files*sizeof(char*));
- free(filen);
- filen = nfilen;
- }
- filen[files++] = strdup(pn);
- bsize = buf.xbuf;
- bloc = buf.xbuf;
- di = S;
- newloop:
- memset(h, 0, sizeof(h));
- version++;
- histfrogp = 0;
- ipc = pc;
- skip = 0;
- loop:
- if(c <= 0)
- goto eof;
- r = bsize - bloc;
- if(r < 100 && r < c) { /* enough for largest prog */
- bsize = readsome(f, buf.xbuf, bloc, bsize, c);
- if(bsize == 0)
- goto eof;
- bloc = buf.xbuf;
- goto loop;
- }
- o = bloc[0]; /* as */
- if(o <= AXXX || o >= ALAST) {
- diag("%s: line %ld: opcode out of range %d", pn, pc-ipc, o);
- print(" probably not a .5 file\n");
- errorexit();
- }
- if(o == ANAME || o == ASIGNAME) {
- sig = 0;
- if(o == ASIGNAME){
- sig = bloc[1] | (bloc[2]<<8) | (bloc[3]<<16) | (bloc[4]<<24);
- bloc += 4;
- c -= 4;
- }
- stop = memchr(&bloc[3], 0, bsize-&bloc[3]);
- if(stop == 0){
- bsize = readsome(f, buf.xbuf, bloc, bsize, c);
- if(bsize == 0)
- goto eof;
- bloc = buf.xbuf;
- stop = memchr(&bloc[3], 0, bsize-&bloc[3]);
- if(stop == 0){
- fprint(2, "%s: name too long\n", pn);
- errorexit();
- }
- }
- v = bloc[1]; /* type */
- o = bloc[2]; /* sym */
- bloc += 3;
- c -= 3;
- r = 0;
- if(v == D_STATIC)
- r = version;
- s = lookup((char*)bloc, r);
- c -= &stop[1] - bloc;
- bloc = stop + 1;
- if(sig != 0){
- if(s->sig != 0 && s->sig != sig)
- diag("incompatible type signatures %lux(%s) and %lux(%s) for %s", s->sig, filen[s->file], sig, pn, s->name);
- s->sig = sig;
- s->file = files-1;
- }
- if(debug['W'])
- print(" ANAME %s\n", s->name);
- h[o] = s;
- if((v == D_EXTERN || v == D_STATIC) && s->type == 0)
- s->type = SXREF;
- if(v == D_FILE) {
- if(s->type != SFILE) {
- histgen++;
- s->type = SFILE;
- s->value = histgen;
- }
- if(histfrogp < MAXHIST) {
- histfrog[histfrogp] = s;
- histfrogp++;
- } else
- collapsefrog(s);
- }
- goto loop;
- }
- if(nhunk < sizeof(Prog))
- gethunk();
- p = (Prog*)hunk;
- nhunk -= sizeof(Prog);
- hunk += sizeof(Prog);
- p->as = o;
- p->scond = bloc[1];
- p->reg = bloc[2];
- p->line = bloc[3] | (bloc[4]<<8) | (bloc[5]<<16) | (bloc[6]<<24);
- r = zaddr(bloc+7, &p->from, h) + 7;
- r += zaddr(bloc+r, &p->to, h);
- bloc += r;
- c -= r;
- if(p->reg > NREG)
- diag("register out of range %d", p->reg);
- p->link = P;
- p->cond = P;
- if(debug['W'])
- print("%P\n", p);
- switch(o) {
- case AHISTORY:
- if(p->to.offset == -1) {
- addlib(pn);
- histfrogp = 0;
- goto loop;
- }
- addhist(p->line, D_FILE); /* 'z' */
- if(p->to.offset)
- addhist(p->to.offset, D_FILE1); /* 'Z' */
- histfrogp = 0;
- goto loop;
- case AEND:
- histtoauto();
- if(curtext != P)
- curtext->to.autom = curauto;
- curauto = 0;
- curtext = P;
- if(c)
- goto newloop;
- return;
- case AGLOBL:
- s = p->from.sym;
- if(s == S) {
- diag("GLOBL must have a name\n%P", p);
- errorexit();
- }
- if(s->type == 0 || s->type == SXREF) {
- s->type = SBSS;
- s->value = 0;
- }
- if(s->type != SBSS) {
- diag("redefinition: %s\n%P", s->name, p);
- s->type = SBSS;
- s->value = 0;
- }
- if(p->to.offset > s->value)
- s->value = p->to.offset;
- break;
- case ADYNT:
- if(p->to.sym == S) {
- diag("DYNT without a sym\n%P", p);
- break;
- }
- di = p->to.sym;
- p->reg = 4;
- if(di->type == SXREF) {
- if(debug['z'])
- Bprint(&bso, "%P set to %d\n", p, dtype);
- di->type = SCONST;
- di->value = dtype;
- dtype += 4;
- }
- if(p->from.sym == S)
- break;
- p->from.offset = di->value;
- p->from.sym->type = SDATA;
- if(curtext == P) {
- diag("DYNT not in text: %P", p);
- break;
- }
- p->to.sym = curtext->from.sym;
- p->to.type = D_CONST;
- p->link = datap;
- datap = p;
- break;
- case AINIT:
- if(p->from.sym == S) {
- diag("INIT without a sym\n%P", p);
- break;
- }
- if(di == S) {
- diag("INIT without previous DYNT\n%P", p);
- break;
- }
- p->from.offset = di->value;
- p->from.sym->type = SDATA;
- p->link = datap;
- datap = p;
- break;
-
- case ADATA:
- if(p->from.sym == S) {
- diag("DATA without a sym\n%P", p);
- break;
- }
- p->link = datap;
- datap = p;
- break;
- case AGOK:
- diag("unknown opcode\n%P", p);
- p->pc = pc;
- pc++;
- break;
- case ATEXT:
- if(curtext != P) {
- histtoauto();
- curtext->to.autom = curauto;
- curauto = 0;
- }
- skip = 0;
- curtext = p;
- autosize = (p->to.offset+3L) & ~3L;
- p->to.offset = autosize;
- autosize += 4;
- s = p->from.sym;
- if(s == S) {
- diag("TEXT must have a name\n%P", p);
- errorexit();
- }
- if(s->type != 0 && s->type != SXREF) {
- if(p->reg & DUPOK) {
- skip = 1;
- goto casedef;
- }
- diag("redefinition: %s\n%P", s->name, p);
- }
- s->type = STEXT;
- s->value = pc;
- lastp->link = p;
- lastp = p;
- p->pc = pc;
- pc++;
- if(textp == P) {
- textp = p;
- etextp = p;
- goto loop;
- }
- etextp->cond = p;
- etextp = p;
- break;
- case ASUB:
- if(p->from.type == D_CONST)
- if(p->from.name == D_NONE)
- if(p->from.offset < 0) {
- p->from.offset = -p->from.offset;
- p->as = AADD;
- }
- goto casedef;
- case AADD:
- if(p->from.type == D_CONST)
- if(p->from.name == D_NONE)
- if(p->from.offset < 0) {
- p->from.offset = -p->from.offset;
- p->as = ASUB;
- }
- goto casedef;
- case AMOVF:
- if(skip)
- goto casedef;
- if(p->from.type == D_FCONST && chipfloat(p->from.ieee) < 0) {
- /* size sb 9 max */
- sprint(literal, "$%lux", ieeedtof(p->from.ieee));
- s = lookup(literal, 0);
- if(s->type == 0) {
- s->type = SBSS;
- s->value = 4;
- t = prg();
- t->as = ADATA;
- t->line = p->line;
- t->from.type = D_OREG;
- t->from.sym = s;
- t->from.name = D_EXTERN;
- t->reg = 4;
- t->to = p->from;
- t->link = datap;
- datap = t;
- }
- p->from.type = D_OREG;
- p->from.sym = s;
- p->from.name = D_EXTERN;
- p->from.offset = 0;
- }
- goto casedef;
- case AMOVD:
- if(skip)
- goto casedef;
- if(p->from.type == D_FCONST && chipfloat(p->from.ieee) < 0) {
- /* size sb 18 max */
- sprint(literal, "$%lux.%lux",
- p->from.ieee->l, p->from.ieee->h);
- s = lookup(literal, 0);
- if(s->type == 0) {
- s->type = SBSS;
- s->value = 8;
- t = prg();
- t->as = ADATA;
- t->line = p->line;
- t->from.type = D_OREG;
- t->from.sym = s;
- t->from.name = D_EXTERN;
- t->reg = 8;
- t->to = p->from;
- t->link = datap;
- datap = t;
- }
- p->from.type = D_OREG;
- p->from.sym = s;
- p->from.name = D_EXTERN;
- p->from.offset = 0;
- }
- goto casedef;
- default:
- casedef:
- if(skip)
- nopout(p);
- if(p->to.type == D_BRANCH)
- p->to.offset += ipc;
- lastp->link = p;
- lastp = p;
- p->pc = pc;
- pc++;
- break;
- }
- goto loop;
- eof:
- diag("truncated object file: %s", pn);
- }
- Sym*
- lookup(char *symb, int v)
- {
- Sym *s;
- char *p;
- long h;
- int c, l;
- h = v;
- for(p=symb; c = *p; p++)
- h = h+h+h + c;
- l = (p - symb) + 1;
- h &= 0xffffff;
- h %= NHASH;
- for(s = hash[h]; s != S; s = s->link)
- if(s->version == v)
- if(memcmp(s->name, symb, l) == 0)
- return s;
- while(nhunk < sizeof(Sym))
- gethunk();
- s = (Sym*)hunk;
- nhunk -= sizeof(Sym);
- hunk += sizeof(Sym);
- s->name = malloc(l);
- memmove(s->name, symb, l);
- s->link = hash[h];
- s->type = 0;
- s->version = v;
- s->value = 0;
- s->sig = 0;
- hash[h] = s;
- return s;
- }
- Prog*
- prg(void)
- {
- Prog *p;
- while(nhunk < sizeof(Prog))
- gethunk();
- p = (Prog*)hunk;
- nhunk -= sizeof(Prog);
- hunk += sizeof(Prog);
- *p = zprg;
- return p;
- }
- void
- gethunk(void)
- {
- char *h;
- long nh;
- nh = NHUNK;
- if(thunk >= 5L*NHUNK) {
- nh = 5L*NHUNK;
- if(thunk >= 25L*NHUNK)
- nh = 25L*NHUNK;
- }
- h = mysbrk(nh);
- if(h == (char*)-1) {
- diag("out of memory");
- errorexit();
- }
- hunk = h;
- nhunk = nh;
- thunk += nh;
- }
- void
- doprof1(void)
- {
- Sym *s;
- long n;
- Prog *p, *q;
- if(debug['v'])
- Bprint(&bso, "%5.2f profile 1\n", cputime());
- Bflush(&bso);
- s = lookup("__mcount", 0);
- n = 1;
- for(p = firstp->link; p != P; p = p->link) {
- if(p->as == ATEXT) {
- q = prg();
- q->line = p->line;
- q->link = datap;
- datap = q;
- q->as = ADATA;
- q->from.type = D_OREG;
- q->from.name = D_EXTERN;
- q->from.offset = n*4;
- q->from.sym = s;
- q->reg = 4;
- q->to = p->from;
- q->to.type = D_CONST;
- q = prg();
- q->line = p->line;
- q->pc = p->pc;
- q->link = p->link;
- p->link = q;
- p = q;
- p->as = AMOVW;
- p->from.type = D_OREG;
- p->from.name = D_EXTERN;
- p->from.sym = s;
- p->from.offset = n*4 + 4;
- p->to.type = D_REG;
- p->to.reg = REGTMP;
- q = prg();
- q->line = p->line;
- q->pc = p->pc;
- q->link = p->link;
- p->link = q;
- p = q;
- p->as = AADD;
- p->from.type = D_CONST;
- p->from.offset = 1;
- p->to.type = D_REG;
- p->to.reg = REGTMP;
- q = prg();
- q->line = p->line;
- q->pc = p->pc;
- q->link = p->link;
- p->link = q;
- p = q;
- p->as = AMOVW;
- p->from.type = D_REG;
- p->from.reg = REGTMP;
- p->to.type = D_OREG;
- p->to.name = D_EXTERN;
- p->to.sym = s;
- p->to.offset = n*4 + 4;
- n += 2;
- continue;
- }
- }
- q = prg();
- q->line = 0;
- q->link = datap;
- datap = q;
- q->as = ADATA;
- q->from.type = D_OREG;
- q->from.name = D_EXTERN;
- q->from.sym = s;
- q->reg = 4;
- q->to.type = D_CONST;
- q->to.offset = n;
- s->type = SBSS;
- s->value = n*4;
- }
- static int brcond[] = {ABEQ, ABNE, ABCS, ABCC, ABMI, ABPL, ABVS, ABVC, ABHI, ABLS, ABGE, ABLT, ABGT, ABLE};
- void
- doprof2(void)
- {
- Sym *s2, *s4;
- Prog *p, *q, *q2, *ps2, *ps4;
- if(debug['v'])
- Bprint(&bso, "%5.2f profile 2\n", cputime());
- Bflush(&bso);
- if(debug['e']){
- s2 = lookup("_tracein", 0);
- s4 = lookup("_traceout", 0);
- }else{
- s2 = lookup("_profin", 0);
- s4 = lookup("_profout", 0);
- }
- if(s2->type != STEXT || s4->type != STEXT) {
- if(debug['e'])
- diag("_tracein/_traceout not defined %d %d", s2->type, s4->type);
- else
- diag("_profin/_profout not defined");
- return;
- }
- ps2 = P;
- ps4 = P;
- for(p = firstp; p != P; p = p->link) {
- if(p->as == ATEXT) {
- if(p->from.sym == s2) {
- ps2 = p;
- p->reg = 1;
- }
- if(p->from.sym == s4) {
- ps4 = p;
- p->reg = 1;
- }
- }
- }
- for(p = firstp; p != P; p = p->link) {
- if(p->as == ATEXT) {
- if(p->reg & NOPROF) {
- for(;;) {
- q = p->link;
- if(q == P)
- break;
- if(q->as == ATEXT)
- break;
- p = q;
- }
- continue;
- }
- /*
- * BL profin
- */
- q = prg();
- q->line = p->line;
- q->pc = p->pc;
- q->link = p->link;
- if(debug['e']){ /* embedded tracing */
- q2 = prg();
- p->link = q2;
- q2->link = q;
- q2->line = p->line;
- q2->pc = p->pc;
- q2->as = AB;
- q2->to.type = D_BRANCH;
- q2->to.sym = p->to.sym;
- q2->cond = q->link;
- }else
- p->link = q;
- p = q;
- p->as = ABL;
- p->to.type = D_BRANCH;
- p->cond = ps2;
- p->to.sym = s2;
- continue;
- }
- if(p->as == ARET) {
- /*
- * RET (default)
- */
- if(debug['e']){ /* embedded tracing */
- q = prg();
- q->line = p->line;
- q->pc = p->pc;
- q->link = p->link;
- p->link = q;
- p = q;
- }
- /*
- * RET
- */
- q = prg();
- q->as = ARET;
- q->from = p->from;
- q->to = p->to;
- q->cond = p->cond;
- q->link = p->link;
- q->reg = p->reg;
- p->link = q;
- if(p->scond != 14) {
- q = prg();
- q->as = ABL;
- q->from = zprg.from;
- q->to = zprg.to;
- q->to.type = D_BRANCH;
- q->cond = ps4;
- q->to.sym = s4;
- q->link = p->link;
- p->link = q;
- p->as = brcond[p->scond^1]; /* complement */
- p->scond = 14;
- p->from = zprg.from;
- p->to = zprg.to;
- p->to.type = D_BRANCH;
- p->cond = q->link->link; /* successor of RET */
- p->to.offset = q->link->link->pc;
- p = q->link->link;
- } else {
- /*
- * BL profout
- */
- p->as = ABL;
- p->from = zprg.from;
- p->to = zprg.to;
- p->to.type = D_BRANCH;
- p->cond = ps4;
- p->to.sym = s4;
- p->scond = 14;
- p = q;
- }
- continue;
- }
- }
- }
- void
- nuxiinit(void)
- {
- int i, c;
- for(i=0; i<4; i++) {
- c = find1(0x04030201L, i+1);
- if(i < 2)
- inuxi2[i] = c;
- if(i < 1)
- inuxi1[i] = c;
- inuxi4[i] = c;
- fnuxi4[i] = c;
- if(debug['d'] == 0){
- fnuxi8[i] = c;
- fnuxi8[i+4] = c+4;
- }
- else{
- fnuxi8[i] = c+4; /* ms word first, then ls, even in little endian mode */
- fnuxi8[i+4] = c;
- }
- }
- if(debug['v']) {
- Bprint(&bso, "inuxi = ");
- for(i=0; i<1; i++)
- Bprint(&bso, "%d", inuxi1[i]);
- Bprint(&bso, " ");
- for(i=0; i<2; i++)
- Bprint(&bso, "%d", inuxi2[i]);
- Bprint(&bso, " ");
- for(i=0; i<4; i++)
- Bprint(&bso, "%d", inuxi4[i]);
- Bprint(&bso, "\nfnuxi = ");
- for(i=0; i<4; i++)
- Bprint(&bso, "%d", fnuxi4[i]);
- Bprint(&bso, " ");
- for(i=0; i<8; i++)
- Bprint(&bso, "%d", fnuxi8[i]);
- Bprint(&bso, "\n");
- }
- Bflush(&bso);
- }
- find1(long l, int c)
- {
- char *p;
- int i;
- p = (char*)&l;
- for(i=0; i<4; i++)
- if(*p++ == c)
- return i;
- return 0;
- }
- long
- ieeedtof(Ieee *ieeep)
- {
- int exp;
- long v;
- if(ieeep->h == 0)
- return 0;
- exp = (ieeep->h>>20) & ((1L<<11)-1L);
- exp -= (1L<<10) - 2L;
- v = (ieeep->h & 0xfffffL) << 3;
- v |= (ieeep->l >> 29) & 0x7L;
- if((ieeep->l >> 28) & 1) {
- v++;
- if(v & 0x800000L) {
- v = (v & 0x7fffffL) >> 1;
- exp++;
- }
- }
- if(exp <= -126 || exp >= 130)
- diag("double fp to single fp overflow");
- v |= ((exp + 126) & 0xffL) << 23;
- v |= ieeep->h & 0x80000000L;
- return v;
- }
- double
- ieeedtod(Ieee *ieeep)
- {
- Ieee e;
- double fr;
- int exp;
- if(ieeep->h & (1L<<31)) {
- e.h = ieeep->h & ~(1L<<31);
- e.l = ieeep->l;
- return -ieeedtod(&e);
- }
- if(ieeep->l == 0 && ieeep->h == 0)
- return 0;
- fr = ieeep->l & ((1L<<16)-1L);
- fr /= 1L<<16;
- fr += (ieeep->l>>16) & ((1L<<16)-1L);
- fr /= 1L<<16;
- fr += (ieeep->h & (1L<<20)-1L) | (1L<<20);
- fr /= 1L<<21;
- exp = (ieeep->h>>20) & ((1L<<11)-1L);
- exp -= (1L<<10) - 2L;
- return ldexp(fr, exp);
- }
- void
- undefsym(Sym *s)
- {
- int n;
- n = imports;
- if(s->value != 0)
- diag("value != 0 on SXREF");
- if(n >= 1<<Rindex)
- diag("import index %d out of range", n);
- s->value = n<<Roffset;
- s->type = SUNDEF;
- imports++;
- }
- void
- zerosig(char *sp)
- {
- Sym *s;
- s = lookup(sp, 0);
- s->sig = 0;
- }
- void
- readundefs(char *f, int t)
- {
- int i, n;
- Sym *s;
- Biobuf *b;
- char *l, buf[256], *fields[64];
- if(f == nil)
- return;
- b = Bopen(f, OREAD);
- if(b == nil){
- diag("could not open %s: %r", f);
- errorexit();
- }
- while((l = Brdline(b, '\n')) != nil){
- n = Blinelen(b);
- if(n >= sizeof(buf)){
- diag("%s: line too long", f);
- errorexit();
- }
- memmove(buf, l, n);
- buf[n-1] = '\0';
- n = getfields(buf, fields, nelem(fields), 1, " \t\r\n");
- if(n == nelem(fields)){
- diag("%s: bad format", f);
- errorexit();
- }
- for(i = 0; i < n; i++) {
- s = lookup(fields[i], 0);
- s->type = SXREF;
- s->subtype = t;
- if(t == SIMPORT)
- nimports++;
- else
- nexports++;
- }
- }
- Bterm(b);
- }
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