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-rw-r--r--src/cmd/6l/obj.c655
1 files changed, 12 insertions, 643 deletions
diff --git a/src/cmd/6l/obj.c b/src/cmd/6l/obj.c
index 47cb44f48..7098b42eb 100644
--- a/src/cmd/6l/obj.c
+++ b/src/cmd/6l/obj.c
@@ -30,17 +30,15 @@
#define EXTERN
#include "l.h"
+#include "../ld/lib.h"
#include "../ld/elf.h"
#include "../ld/macho.h"
#include <ar.h>
char *noname = "<none>";
-char symname[] = SYMDEF;
char thechar = '6';
char* thestring = "amd64";
char* paramspace = "FP";
-char* libdir[16]; // contains "." first, goroot last
-int nlibdir = 0;
/*
* -H2 -T4136 -R4096 is plan9 64-bit format
@@ -85,7 +83,6 @@ void
main(int argc, char *argv[])
{
int i, c;
- char *a;
Binit(&bso, 1, OWRITE);
cout = -1;
@@ -98,7 +95,6 @@ main(int argc, char *argv[])
INITDAT = -1;
INITRND = -1;
INITENTRY = 0;
- libdir[nlibdir++] = "."; // look in dot first
ARGBEGIN {
default:
@@ -116,11 +112,7 @@ main(int argc, char *argv[])
HEADTYPE = atolwhex(EARGF(usage()));
break;
case 'L':
- if(nlibdir >= nelem(libdir)-1) {
- print("too many -L's: %d\n", nlibdir);
- usage();
- }
- libdir[nlibdir++] = EARGF(usage());
+ Lflag(EARGF(usage()));
break;
case 'T':
INITTEXT = atolwhex(EARGF(usage()));
@@ -147,12 +139,7 @@ main(int argc, char *argv[])
if(*argv == 0)
usage();
- mywhatsys(); // get goroot, goarch, goos
- if(strcmp(goarch, thestring) != 0)
- print("goarch is not known: %s\n", goarch);
-
- // put goroot in the libdir list.
- libdir[nlibdir++] = smprint("%s/pkg/%s_%s", goroot, goos, goarch);
+ libinit();
if(HEADTYPE == -1) {
HEADTYPE = 2;
@@ -348,33 +335,18 @@ main(int argc, char *argv[])
edatap = P;
pc = 0;
dtype = 4;
- unlink(outfile);
- cout = create(outfile, 1, 0775);
- if(cout < 0) {
- diag("cannot create %s", outfile);
- errorexit();
- }
version = 0;
cbp = buf.cbuf;
cbc = sizeof(buf.cbuf);
firstp = prg();
lastp = firstp;
- if(INITENTRY == nil) {
- INITENTRY = mal(strlen(goarch)+strlen(goos)+10);
- sprint(INITENTRY, "_rt0_%s_%s", goarch, goos);
- }
- lookup(INITENTRY, 0)->type = SXREF;
-
while(*argv)
objfile(*argv++);
- if(!debug['l']) {
+ if(!debug['l'])
loadlib();
- a = mal(strlen(goroot)+strlen(goarch)+strlen(goos)+20);
- sprint(a, "%s/pkg/%s_%s/runtime.a", goroot, goos, goarch);
- objfile(a);
- }
+
deadcode();
firstp = firstp->link;
@@ -419,7 +391,6 @@ main(int argc, char *argv[])
if(debug['v']) {
Bprint(&bso, "%5.2f cpu time\n", cputime());
Bprint(&bso, "%ld symbols\n", nsymbol);
- Bprint(&bso, "%ld memory used\n", thunk);
Bprint(&bso, "%d sizeof adr\n", sizeof(Adr));
Bprint(&bso, "%d sizeof prog\n", sizeof(Prog));
}
@@ -429,160 +400,6 @@ main(int argc, char *argv[])
}
void
-loadlib(void)
-{
- int i;
- int32 h;
- Sym *s;
-
-loop:
- xrefresolv = 0;
- for(i=0; i<libraryp; i++) {
- if(debug['v'])
- Bprint(&bso, "%5.2f autolib: %s (from %s)\n", cputime(), library[i], libraryobj[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)
-{
- int32 off, esym, cnt, l;
- int work;
- Biobuf *f;
- Sym *s;
- char magbuf[SARMAG];
- char name[100], pname[150];
- struct ar_hdr arhdr;
- char *e, *start, *stop;
-
- if(file[0] == '-' && file[1] == 'l') { // TODO: fix this
- if(debug['9'])
- sprint(name, "/%s/lib/lib", thestring);
- else
- sprint(name, "/usr/%clib/lib", thechar);
- strcat(name, file+2);
- strcat(name, ".a");
- file = name;
- }
- if(debug['v'])
- Bprint(&bso, "%5.2f ldobj: %s\n", cputime(), file);
- Bflush(&bso);
- f = Bopen(file, 0);
- if(f == nil) {
- diag("cannot open file: %s", file);
- errorexit();
- }
- l = Bread(f, magbuf, SARMAG);
- if(l != SARMAG || strncmp(magbuf, ARMAG, SARMAG)){
- /* load it as a regular file */
- l = Bseek(f, 0L, 2);
- Bseek(f, 0L, 0);
- ldobj(f, l, file);
- Bterm(f);
- return;
- }
-
- l = Bread(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
- */
- Bseek(f, off, 0);
- cnt = esym - off;
- start = mal(cnt + 10);
- cnt = Bread(f, start, cnt);
- if(cnt <= 0){
- Bterm(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;
- Bseek(f, l, 0);
- l = Bread(f, &arhdr, SAR_HDR);
- if(l != SAR_HDR)
- goto bad;
- if(strncmp(arhdr.fmag, ARFMAG, sizeof(arhdr.fmag)))
- goto bad;
- l = SARNAME;
- while(l > 0 && arhdr.name[l-1] == ' ')
- l--;
- sprint(pname, "%s(%.*s)", file, l, arhdr.name);
- 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:
- Bterm(f);
-}
-
-int32
-Bget4(Biobuf *f)
-{
- uchar p[4];
-
- if(Bread(f, p, 4) != 4)
- return 0;
- return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
-}
-
-void
zaddr(Biobuf *f, Adr *a, Sym *h[])
{
int t;
@@ -655,182 +472,6 @@ zaddr(Biobuf *f, Adr *a, Sym *h[])
}
void
-addlib(char *src, char *obj)
-{
- char name[1024], pname[1024], comp[256], *p;
- int i, search;
-
- if(histfrogp <= 0)
- return;
-
- 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(name) + strlen(comp) + 3 >= sizeof(name)) {
- diag("library component too long");
- return;
- }
- strcat(name, "/");
- strcat(name, comp);
- }
-
- if(search) {
- // try dot, -L "libdir", and then goroot.
- for(i=0; i<nlibdir; i++) {
- snprint(pname, sizeof pname, "%s/%s", libdir[i], name);
- if(access(pname, AEXIST) >= 0)
- break;
- }
- strcpy(name, pname);
- }
- cleanname(name);
- if(debug['v'])
- Bprint(&bso, "%5.2f addlib: %s %s pulls in %s\n", cputime(), obj, src, name);
-
- 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 = mal(strlen(name) + 1);
- strcpy(p, name);
- library[libraryp] = p;
- p = mal(strlen(obj) + 1);
- strcpy(p, obj);
- libraryobj[libraryp] = p;
- libraryp++;
-}
-
-void
-copyhistfrog(char *buf, int nbuf)
-{
- char *p, *ep;
- int i;
-
- p = buf;
- ep = buf + nbuf;
- i = 0;
- for(i=0; i<histfrogp; i++) {
- p = seprint(p, ep, "%s", histfrog[i]->name+1);
- if(i+1<histfrogp && (p == buf || p[-1] != '/'))
- p = seprint(p, ep, "/");
- }
-}
-
-void
-addhist(int32 line, int type)
-{
- Auto *u;
- Sym *s;
- int i, j, k;
-
- u = mal(sizeof(Auto));
- s = mal(sizeof(Sym));
- s->name = mal(2*(histfrogp+1) + 1);
-
- u->asym = s;
- u->type = type;
- u->aoffset = line;
- u->link = curhist;
- curhist = u;
-
- s->name[0] = 0;
- 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;
- }
- s->name[j] = 0;
- s->name[j+1] = 0;
-}
-
-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;
@@ -839,71 +480,22 @@ nopout(Prog *p)
}
void
-ldobj(Biobuf *f, int64 len, char *pn)
+ldobj1(Biobuf *f, int64 len, char *pn)
{
vlong ipc;
Prog *p, *t;
int v, o, r, skip, mode;
Sym *h[NSYM], *s, *di;
uint32 sig;
- static int files;
- static char **filen;
- char **nfilen, *line, *name;
- int ntext, n, c1, c2, c3;
+ char *name;
+ int ntext;
vlong eof;
- vlong import0, import1;
char src[1024];
- src[0] = '\0';
- eof = Boffset(f) + len;
-
ntext = 0;
-
- if((files&15) == 0){
- nfilen = malloc((files+16)*sizeof(char*));
- memmove(nfilen, filen, files*sizeof(char*));
- free(filen);
- filen = nfilen;
- }
- pn = strdup(pn);
- filen[files++] = pn;
-
+ eof = Boffset(f) + len;
di = S;
-
- /* check the header */
- line = Brdline(f, '\n');
- if(line == nil) {
- if(Blinelen(f) > 0) {
- diag("%s: malformed object file", pn);
- return;
- }
- goto eof;
- }
- n = Blinelen(f) - 1;
- if(n != strlen(thestring) || strncmp(line, thestring, n) != 0) {
- if(line)
- line[n] = '\0';
- diag("file not %s [%s]\n", thestring, line);
- return;
- }
-
- /* skip over exports and other info -- ends with \n!\n */
- import0 = Boffset(f);
- c1 = '\n'; // the last line ended in \n
- c2 = Bgetc(f);
- c3 = Bgetc(f);
- while(c1 != '\n' || c2 != '!' || c3 != '\n') {
- c1 = c2;
- c2 = c3;
- c3 = Bgetc(f);
- if(c3 == Beof)
- goto eof;
- }
- import1 = Boffset(f);
-
- Bseek(f, import0, 0);
- ldpkg(f, import1 - import0 - 2, pn); // -2 for !\n
- Bseek(f, import1, 0);
+ src[0] = 0;
newloop:
memset(h, 0, sizeof(h));
@@ -953,9 +545,9 @@ loop:
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, s->file, sig, pn, s->name);
s->sig = sig;
- s->file = files-1;
+ s->file = pn;
}
if(debug['W'])
@@ -1256,43 +848,6 @@ eof:
diag("truncated object file: %s", pn);
}
-Sym*
-lookup(char *symb, int v)
-{
- Sym *s;
- char *p;
- int32 h;
- int l, c;
-
- h = v;
- for(p=symb; c = *p; p++)
- h = h+h+h + c;
- l = (p - symb) + 1;
- if(h < 0)
- h = ~h;
- h %= NHASH;
- for(s = hash[h]; s != S; s = s->link)
- if(s->version == v)
- if(memcmp(s->name, symb, l) == 0)
- return s;
-
- s = mal(sizeof(*s));
- if(debug['v'] > 1)
- Bprint(&bso, "lookup %s\n", symb);
-
- s->name = mal(l + 1);
- memmove(s->name, symb, l);
-
- s->link = hash[h];
- s->type = 0;
- s->version = v;
- s->value = 0;
- s->sig = 0;
- hash[h] = s;
- nsymbol++;
- return s;
-}
-
Prog*
prg(void)
{
@@ -1477,189 +1032,3 @@ doprof2(void)
}
}
-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;
- inuxi8[i] = c;
- inuxi8[i+4] = c+4;
- fnuxi4[i] = c;
- fnuxi8[i] = c;
- fnuxi8[i+4] = c+4;
- }
- 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, " ");
- for(i=0; i<8; i++)
- Bprint(&bso, "%d", inuxi8[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);
-}
-
-int
-find1(int32 l, int c)
-{
- char *p;
- int i;
-
- p = (char*)&l;
- for(i=0; i<4; i++)
- if(*p++ == c)
- return i;
- return 0;
-}
-
-int
-find2(int32 l, int c)
-{
- short *p;
- int i;
-
- p = (short*)&l;
- for(i=0; i<4; i+=2) {
- if(((*p >> 8) & 0xff) == c)
- return i;
- if((*p++ & 0xff) == c)
- return i+1;
- }
- return 0;
-}
-
-int32
-ieeedtof(Ieee *e)
-{
- int exp;
- int32 v;
-
- if(e->h == 0)
- return 0;
- exp = (e->h>>20) & ((1L<<11)-1L);
- exp -= (1L<<10) - 2L;
- v = (e->h & 0xfffffL) << 3;
- v |= (e->l >> 29) & 0x7L;
- if((e->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 |= e->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);
-}
generated by cgit v1.2.3 (git 2.46.0) at 2025-10-25 23:10:49 +0000