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-rw-r--r--src/cmd/5l/obj.c731
1 files changed, 14 insertions, 717 deletions
diff --git a/src/cmd/5l/obj.c b/src/cmd/5l/obj.c
index 80f5787dc..86a0ece2e 100644
--- a/src/cmd/5l/obj.c
+++ b/src/cmd/5l/obj.c
@@ -30,120 +30,24 @@
// Reading object files.
-#define EXTERN
#include "l.h"
#include "../ld/lib.h"
#include "../ld/elf.h"
#include "../ld/dwarf.h"
#include <ar.h>
-#ifndef DEFAULT
-#define DEFAULT '9'
-#endif
-
-char *noname = "<none>";
-char *thestring = "arm";
-
-Header headers[] = {
- "noheader", Hnoheader,
- "risc", Hrisc,
- "plan9", Hplan9x32,
- "ixp1200", Hixp1200,
- "ipaq", Hipaq,
- "linux", Hlinux,
- "freebsd", Hfreebsd,
- "netbsd", Hnetbsd,
- 0, 0
-};
-
-/*
- * -Hrisc -T0x10005000 -R4 is aif for risc os
- * -Hplan9 -T4128 -R4096 is plan9 format
- * -Hixp1200 is IXP1200 (raw)
- * -Hipaq -T0xC0008010 -R1024 is ipaq
- * -Hlinux -Tx -Rx is linux elf
- * -Hfreebsd is freebsd elf
- * -Hnetbsd is netbsd elf
- */
+char *thestring = "arm";
+LinkArch *thelinkarch = &linkarm;
void
-main(int argc, char *argv[])
+linkarchinit(void)
{
- char *p;
- Sym *s;
-
- Binit(&bso, 1, OWRITE);
- listinit();
- nerrors = 0;
- outfile = "5.out";
- HEADTYPE = -1;
- INITTEXT = -1;
- INITDAT = -1;
- INITRND = -1;
- INITENTRY = 0;
- linkmode = LinkAuto;
- nuxiinit();
-
- p = getgoarm();
- if(p != nil)
- goarm = atoi(p);
- else
- goarm = 6;
- if(goarm == 5)
- debug['F'] = 1;
-
- flagcount("1", "use alternate profiling code", &debug['1']);
- flagfn1("B", "info: define ELF NT_GNU_BUILD_ID note", addbuildinfo);
- flagstr("E", "sym: entry symbol", &INITENTRY);
- flagint32("D", "addr: data address", &INITDAT);
- flagcount("G", "debug pseudo-ops", &debug['G']);
- flagfn1("I", "interp: set ELF interp", setinterp);
- flagfn1("L", "dir: add dir to library path", Lflag);
- flagfn1("H", "head: header type", setheadtype);
- flagcount("K", "add stack underflow checks", &debug['K']);
- flagcount("M", "disable software div/mod", &debug['M']);
- flagcount("O", "print pc-line tables", &debug['O']);
- flagcount("P", "debug code generation", &debug['P']);
- flagint32("R", "rnd: address rounding", &INITRND);
- flagint32("T", "addr: text address", &INITTEXT);
- flagfn0("V", "print version and exit", doversion);
- flagcount("W", "disassemble input", &debug['W']);
- flagfn2("X", "name value: define string data", addstrdata);
- flagcount("Z", "clear stack frame on entry", &debug['Z']);
- flagcount("a", "disassemble output", &debug['a']);
- flagcount("c", "dump call graph", &debug['c']);
- flagcount("d", "disable dynamic executable", &debug['d']);
- flagstr("extld", "linker to run in external mode", &extld);
- flagstr("extldflags", "flags for external linker", &extldflags);
- flagcount("f", "ignore version mismatch", &debug['f']);
- flagcount("g", "disable go package data checks", &debug['g']);
- flagstr("installsuffix", "pkg directory suffix", &flag_installsuffix);
- flagstr("k", "sym: set field tracking symbol", &tracksym);
- flagfn1("linkmode", "mode: set link mode (internal, external, auto)", setlinkmode);
- flagcount("n", "dump symbol table", &debug['n']);
- flagstr("o", "outfile: set output file", &outfile);
- flagcount("p", "insert profiling code", &debug['p']);
- flagstr("r", "dir1:dir2:...: set ELF dynamic linker search path", &rpath);
- flagcount("race", "enable race detector", &flag_race);
- flagcount("s", "disable symbol table", &debug['s']);
- flagcount("shared", "generate shared object (implies -linkmode external)", &flag_shared);
- flagstr("tmpdir", "leave temporary files in this directory", &tmpdir);
- flagcount("u", "reject unsafe packages", &debug['u']);
- flagcount("v", "print link trace", &debug['v']);
- flagcount("w", "disable DWARF generation", &debug['w']);
-
- flagparse(&argc, &argv, usage);
-
- if(argc != 1)
- usage();
-
- if(flag_shared)
- linkmode = LinkExternal;
-
- mywhatsys();
+}
- if(HEADTYPE == -1)
- HEADTYPE = headtype(goos);
+void
+archinit(void)
+{
+ LSym *s;
// getgoextlinkenabled is based on GO_EXTLINK_ENABLED when
// Go was built; see ../../make.bash.
@@ -158,34 +62,15 @@ main(int argc, char *argv[])
sysfatal("cannot use -linkmode=external with -H %s", headstr(HEADTYPE));
break;
case Hlinux:
+ case Hfreebsd:
break;
}
- libinit();
-
switch(HEADTYPE) {
default:
diag("unknown -H option");
errorexit();
- case Hnoheader: /* no header */
- HEADR = 0L;
- if(INITTEXT == -1)
- INITTEXT = 0;
- if(INITDAT == -1)
- INITDAT = 0;
- if(INITRND == -1)
- INITRND = 4;
- break;
- case Hrisc: /* aif for risc os */
- HEADR = 128L;
- if(INITTEXT == -1)
- INITTEXT = 0x10005000 + HEADR;
- if(INITDAT == -1)
- INITDAT = 0;
- if(INITRND == -1)
- INITRND = 4;
- break;
- case Hplan9x32: /* plan 9 */
+ case Hplan9: /* plan 9 */
HEADR = 32L;
if(INITTEXT == -1)
INITTEXT = 4128;
@@ -194,30 +79,11 @@ main(int argc, char *argv[])
if(INITRND == -1)
INITRND = 4096;
break;
- case Hixp1200: /* boot for IXP1200 */
- HEADR = 0L;
- if(INITTEXT == -1)
- INITTEXT = 0x0;
- if(INITDAT == -1)
- INITDAT = 0;
- if(INITRND == -1)
- INITRND = 4;
- break;
- case Hipaq: /* boot for ipaq */
- HEADR = 16L;
- if(INITTEXT == -1)
- INITTEXT = 0xC0008010;
- if(INITDAT == -1)
- INITDAT = 0;
- if(INITRND == -1)
- INITRND = 1024;
- break;
case Hlinux: /* arm elf */
case Hfreebsd:
case Hnetbsd:
+ case Hnacl:
debug['d'] = 0; // with dynamic linking
- tlsoffset = -8; // hardcoded number, first 4-byte word for g, and then 4-byte word for m
- // this number is known to ../../pkg/runtime/rt0_*_arm.s
elfinit();
HEADR = ELFRESERVE;
if(INITTEXT == -1)
@@ -231,578 +97,9 @@ main(int argc, char *argv[])
if(INITDAT != 0 && INITRND != 0)
print("warning: -D0x%ux is ignored because of -R0x%ux\n",
INITDAT, INITRND);
- if(debug['v'])
- Bprint(&bso, "HEADER = -H0x%d -T0x%ux -D0x%ux -R0x%ux\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;
- pc = 0;
- dtype = 4;
-
- version = 0;
- cbp = buf.cbuf;
- cbc = sizeof(buf.cbuf);
// embed goarm to runtime.goarm
- s = lookup("runtime.goarm", 0);
- s->dupok = 1;
- adduint8(s, goarm);
-
- addlibpath("command line", "command line", argv[0], "main");
- loadlib();
-
- // mark some functions that are only referenced after linker code editing
- if(debug['F'])
- mark(rlookup("_sfloat", 0));
- mark(lookup("runtime.read_tls_fallback", 0));
- deadcode();
- if(textp == nil) {
- diag("no code");
- errorexit();
- }
-
- patch();
- if(debug['p'])
- if(debug['1'])
- doprof1();
- else
- doprof2();
- doelf();
- follow();
- softfloat();
- // 5l -Z means zero the stack frame on entry.
- // This slows down function calls but can help avoid
- // false positives in garbage collection.
- if(debug['Z'])
- dozerostk();
- noops(); // generate stack split prolog, handle div/mod, etc.
- dostkcheck();
- span();
- addexport();
- // textaddress() functionality is handled in span()
- pclntab();
- symtab();
- dodata();
- address();
- doweak();
- reloc();
- asmb();
- undef();
- hostlink();
-
- if(debug['c'])
- print("ARM size = %d\n", armsize);
- if(debug['v']) {
- Bprint(&bso, "%5.2f cpu time\n", cputime());
- Bprint(&bso, "%d sizeof adr\n", sizeof(Adr));
- Bprint(&bso, "%d sizeof prog\n", sizeof(Prog));
- }
- Bflush(&bso);
- errorexit();
-}
-
-static Sym*
-zsym(char *pn, Biobuf *f, Sym *h[])
-{
- int o;
-
- o = BGETC(f);
- if(o == 0)
- return S;
- if(o < 0 || o >= NSYM || h[o] == nil)
- mangle(pn);
- return h[o];
-}
-
-static void
-zaddr(char *pn, Biobuf *f, Adr *a, Sym *h[])
-{
- int i, c;
- int32 l;
- Sym *s;
- Auto *u;
-
- a->type = BGETC(f);
- a->reg = BGETC(f);
- c = BGETC(f);
- if(c < 0 || c > NSYM){
- print("sym out of range: %d\n", c);
- BPUTC(f, ALAST+1);
- return;
- }
- a->sym = h[c];
- a->name = BGETC(f);
- adrgotype = zsym(pn, f, h);
-
- if((schar)a->reg < 0 || a->reg > NREG) {
- print("register out of range %d\n", a->reg);
- BPUTC(f, ALAST+1);
- return; /* force real diagnostic */
- }
-
- if(a->type == D_CONST || a->type == D_OCONST) {
- if(a->name == D_EXTERN || a->name == D_STATIC) {
- s = a->sym;
- if(s != S && (s->type == STEXT || s->type == SCONST || s->type == SXREF)) {
- if(0 && !s->fnptr && s->name[0] != '.')
- print("%s used as function pointer\n", s->name);
- s->fnptr = 1; // over the top cos of SXREF
- }
- }
- }
-
- switch(a->type) {
- default:
- print("unknown type %d\n", a->type);
- BPUTC(f, ALAST+1);
- return; /* force real diagnostic */
-
- case D_NONE:
- case D_REG:
- case D_FREG:
- case D_PSR:
- case D_FPCR:
- break;
-
- case D_REGREG:
- case D_REGREG2:
- a->offset = BGETC(f);
- break;
-
- case D_CONST2:
- a->offset2 = BGETLE4(f); // fall through
- case D_BRANCH:
- case D_OREG:
- case D_CONST:
- case D_OCONST:
- case D_SHIFT:
- a->offset = BGETLE4(f);
- break;
-
- case D_SCONST:
- a->sval = mal(NSNAME);
- Bread(f, a->sval, NSNAME);
- break;
-
- case D_FCONST:
- a->ieee.l = BGETLE4(f);
- a->ieee.h = BGETLE4(f);
- break;
- }
- s = a->sym;
- if(s == S)
- return;
- i = a->name;
- if(i != D_AUTO && i != D_PARAM) {
- if(s && adrgotype)
- s->gotype = adrgotype;
- return;
- }
-
- 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;
- if(adrgotype)
- u->gotype = adrgotype;
- return;
- }
-
- u = mal(sizeof(Auto));
- u->link = curauto;
- curauto = u;
- u->asym = s;
- u->aoffset = l;
- u->type = i;
- u->gotype = adrgotype;
-}
-
-void
-nopout(Prog *p)
-{
- p->as = ANOP;
- p->from.type = D_NONE;
- p->to.type = D_NONE;
-}
-
-void
-ldobj1(Biobuf *f, char *pkg, int64 len, char *pn)
-{
- int32 ipc;
- Prog *p;
- Sym *h[NSYM], *s;
- int v, o, r, skip;
- uint32 sig;
- char *name;
- int ntext;
- int32 eof;
- char src[1024], *x;
- Prog *lastp;
-
- lastp = nil;
- ntext = 0;
- eof = Boffset(f) + len;
- src[0] = 0;
- pn = estrdup(pn); // we keep it in Sym* references
-
-newloop:
- memset(h, 0, sizeof(h));
- version++;
- histfrogp = 0;
- ipc = pc;
- skip = 0;
-
-loop:
- if(f->state == Bracteof || Boffset(f) >= eof)
- goto eof;
- o = BGETC(f);
- if(o == Beof)
- goto eof;
-
- if(o <= AXXX || o >= ALAST) {
- diag("%s:#%lld: opcode out of range: %#ux", pn, Boffset(f), o);
- print(" probably not a .5 file\n");
- errorexit();
- }
- if(o == ANAME || o == ASIGNAME) {
- sig = 0;
- if(o == ASIGNAME)
- sig = BGETLE4(f);
- v = BGETC(f); /* type */
- o = BGETC(f); /* sym */
- r = 0;
- if(v == D_STATIC)
- r = version;
- name = Brdline(f, '\0');
- if(name == nil) {
- if(Blinelen(f) > 0) {
- fprint(2, "%s: name too long\n", pn);
- errorexit();
- }
- goto eof;
- }
- x = expandpkg(name, pkg);
- s = lookup(x, r);
- if(x != name)
- free(x);
-
- if(sig != 0){
- if(s->sig != 0 && s->sig != sig)
- diag("incompatible type signatures %ux(%s) and %ux(%s) for %s", s->sig, s->file, sig, pn, s->name);
- s->sig = sig;
- s->file = pn;
- }
-
- if(debug['W'])
- print(" ANAME %s\n", s->name);
- if(o < 0 || o >= nelem(h)) {
- fprint(2, "%s: mangled input file\n", pn);
- errorexit();
- }
- 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);
- dwarfaddfrag(s->value, s->name);
- }
- goto loop;
- }
-
- p = mal(sizeof(Prog));
- p->as = o;
- p->scond = BGETC(f);
- p->reg = BGETC(f);
- p->line = BGETLE4(f);
-
- zaddr(pn, f, &p->from, h);
- fromgotype = adrgotype;
- zaddr(pn, f, &p->to, h);
-
- if(p->as != ATEXT && p->as != AGLOBL && p->reg > NREG)
- diag("register out of range %A %d", p->as, 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(src, pn);
- histfrogp = 0;
- goto loop;
- }
- if(src[0] == '\0')
- copyhistfrog(src, sizeof src);
- addhist(p->line, D_FILE); /* 'z' */
- if(p->to.offset)
- addhist(p->to.offset, D_FILE1); /* 'Z' */
- savehist(p->line, p->to.offset);
- histfrogp = 0;
- goto loop;
-
- case AEND:
- histtoauto();
- if(cursym != nil && cursym->text)
- cursym->autom = curauto;
- curauto = 0;
- cursym = nil;
- if(Boffset(f) == eof)
- return;
- goto newloop;
-
- 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 && s->type != SNOPTRBSS && !s->dupok) {
- diag("redefinition: %s\n%P", s->name, p);
- s->type = SBSS;
- s->value = 0;
- }
- if(p->to.offset > s->size)
- s->size = p->to.offset;
- if(p->reg & DUPOK)
- s->dupok = 1;
- if(p->reg & RODATA)
- s->type = SRODATA;
- else if(p->reg & NOPTR)
- s->type = SNOPTRBSS;
- break;
-
- case ADATA:
- // Assume that AGLOBL comes after ADATA.
- // If we've seen an AGLOBL that said this sym was DUPOK,
- // ignore any more ADATA we see, which must be
- // redefinitions.
- s = p->from.sym;
- if(s->dupok) {
-// if(debug['v'])
-// Bprint(&bso, "skipping %s in %s: dupok\n", s->name, pn);
- goto loop;
- }
- if(s->file == nil)
- s->file = pn;
- else if(s->file != pn) {
- diag("multiple initialization for %s: in both %s and %s", s->name, s->file, pn);
- errorexit();
- }
- savedata(s, p, pn);
- unmal(p, sizeof *p);
- break;
-
- case AGOK:
- diag("unknown opcode\n%P", p);
- p->pc = pc;
- pc++;
- break;
-
- case ATYPE:
- if(skip)
- goto casedef;
- pc++;
- goto loop;
-
- case ATEXT:
- if(cursym != nil && cursym->text) {
- histtoauto();
- cursym->autom = curauto;
- curauto = 0;
- }
- s = p->from.sym;
- if(s == S) {
- diag("TEXT must have a name\n%P", p);
- errorexit();
- }
- cursym = s;
- if(s->type != 0 && s->type != SXREF && (p->reg & DUPOK)) {
- skip = 1;
- goto casedef;
- }
- if(ntext++ == 0 && s->type != 0 && s->type != SXREF) {
- /* redefinition, so file has probably been seen before */
- if(debug['v'])
- Bprint(&bso, "skipping: %s: redefinition: %s", pn, s->name);
- return;
- }
- skip = 0;
- if(s->type != 0 && s->type != SXREF)
- diag("redefinition: %s\n%P", s->name, p);
- if(etextp)
- etextp->next = s;
- else
- textp = s;
- if(fromgotype) {
- if(s->gotype && s->gotype != fromgotype)
- diag("%s: type mismatch for %s", pn, s->name);
- s->gotype = fromgotype;
- }
- etextp = s;
- p->align = 4;
- autosize = (p->to.offset+3L) & ~3L;
- p->to.offset = autosize;
- autosize += 4;
- s->type = STEXT;
- s->hist = gethist();
- s->text = p;
- s->value = pc;
- s->args = p->to.offset2;
- lastp = p;
- p->pc = pc;
- pc++;
- 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 AMOVWD:
- case AMOVWF:
- case AMOVDW:
- case AMOVFW:
- case AMOVFD:
- case AMOVDF:
- // case AMOVF:
- // case AMOVD:
- case ACMPF:
- case ACMPD:
- case AADDF:
- case AADDD:
- case ASUBF:
- case ASUBD:
- case AMULF:
- case AMULD:
- case ADIVF:
- case ADIVD:
- goto casedef;
-
- case AMOVF:
- if(skip)
- goto casedef;
-
- if(p->from.type == D_FCONST && chipfloat(&p->from.ieee) < 0 &&
- (chipzero(&p->from.ieee) < 0 || (p->scond & C_SCOND) != C_SCOND_NONE)) {
- /* size sb 9 max */
- sprint(literal, "$%ux", ieeedtof(&p->from.ieee));
- s = lookup(literal, 0);
- if(s->type == 0) {
- s->type = SRODATA;
- adduint32(s, ieeedtof(&p->from.ieee));
- s->reachable = 0;
- }
- p->from.type = D_OREG;
- p->from.sym = s;
- p->from.name = D_EXTERN;
- p->from.offset = 0;
- }
- goto casedef;
-
- case AMOVD:
- if(skip)
- goto casedef;
-
- if(p->from.type == D_FCONST && chipfloat(&p->from.ieee) < 0 &&
- (chipzero(&p->from.ieee) < 0 || (p->scond & C_SCOND) != C_SCOND_NONE)) {
- /* size sb 18 max */
- sprint(literal, "$%ux.%ux",
- p->from.ieee.l, p->from.ieee.h);
- s = lookup(literal, 0);
- if(s->type == 0) {
- s->type = SRODATA;
- adduint32(s, p->from.ieee.l);
- adduint32(s, p->from.ieee.h);
- s->reachable = 0;
- }
- 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);
- p->pc = pc;
- pc++;
- if(p->to.type == D_BRANCH)
- p->to.offset += ipc;
- if(lastp == nil) {
- if(p->as != ANOP)
- diag("unexpected instruction: %P", p);
- break;
- }
- lastp->link = p;
- lastp = p;
- break;
- }
- goto loop;
-
-eof:
- diag("truncated object file: %s", pn);
-}
-
-Prog*
-prg(void)
-{
- Prog *p;
-
- p = mal(sizeof(Prog));
- *p = zprg;
- return p;
-}
-
-Prog*
-appendp(Prog *q)
-{
- Prog *p;
-
- p = prg();
- p->link = q->link;
- q->link = p;
- p->line = q->line;
- return p;
+ s = linklookup(ctxt, "runtime.goarm", 0);
+ s->type = SRODATA;
+ adduint8(ctxt, s, ctxt->goarm);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-17 23:33:53 +0000