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Diffstat (limited to 'src/cmd/ld/symtab.c')
-rw-r--r--src/cmd/ld/symtab.c244
1 files changed, 51 insertions, 193 deletions
diff --git a/src/cmd/ld/symtab.c b/src/cmd/ld/symtab.c
index c9b4657f7..6d321c0bb 100644
--- a/src/cmd/ld/symtab.c
+++ b/src/cmd/ld/symtab.c
@@ -40,6 +40,7 @@ static int
putelfstr(char *s)
{
int off, n;
+ char *p, *q;
if(elfstrsize == 0 && s[0] != 0) {
// first entry must be empty string
@@ -54,6 +55,21 @@ putelfstr(char *s)
off = elfstrsize;
elfstrsize += n;
memmove(elfstrdat+off, s, n);
+ // replace "·" as ".", because DTrace cannot handle it.
+ p = strstr(s, "·");
+ if(p != nil) {
+ p = q = elfstrdat+off;
+ while (*q != '\0') {
+ if((uchar)*q == 0xc2 && (uchar)*(q+1) == 0xb7) {
+ q += 2;
+ *p++ = '.';
+ elfstrsize--;
+ } else {
+ *p++ = *q++;
+ }
+ }
+ *p = '\0';
+ }
return off;
}
@@ -86,10 +102,10 @@ static int numelfsym = 1; // 0 is reserved
static int elfbind;
static void
-putelfsym(Sym *x, char *s, int t, vlong addr, vlong size, int ver, Sym *go)
+putelfsym(LSym *x, char *s, int t, vlong addr, vlong size, int ver, LSym *go)
{
int bind, type, off;
- Sym *xo;
+ LSym *xo;
USED(go);
switch(t) {
@@ -109,12 +125,12 @@ putelfsym(Sym *x, char *s, int t, vlong addr, vlong size, int ver, Sym *go)
while(xo->outer != nil)
xo = xo->outer;
if(xo->sect == nil) {
- cursym = x;
+ ctxt->cursym = x;
diag("missing section in putelfsym");
return;
}
if(xo->sect->elfsect == nil) {
- cursym = x;
+ ctxt->cursym = x;
diag("missing ELF section in putelfsym");
return;
}
@@ -143,7 +159,7 @@ putelfsym(Sym *x, char *s, int t, vlong addr, vlong size, int ver, Sym *go)
}
void
-putelfsectionsym(Sym* s, int shndx)
+putelfsectionsym(LSym* s, int shndx)
{
putelfsyment(0, 0, 0, (STB_LOCAL<<4)|STT_SECTION, shndx, 0);
s->elfsym = numelfsym++;
@@ -170,7 +186,8 @@ putelfsymshndx(vlong sympos, int shndx)
void
asmelfsym(void)
{
- Sym *s;
+ LSym *s;
+ char *name;
// the first symbol entry is reserved
putelfsyment(0, 0, 0, (STB_LOCAL<<4)|STT_NOTYPE, 0, 0);
@@ -181,9 +198,9 @@ asmelfsym(void)
genasmsym(putelfsym);
if(linkmode == LinkExternal && HEADTYPE != Hopenbsd) {
- s = lookup("runtime.tlsgm", 0);
+ s = linklookup(ctxt, "runtime.tlsgm", 0);
if(s->sect == nil) {
- cursym = nil;
+ ctxt->cursym = nil;
diag("missing section for %s", s->name);
errorexit();
}
@@ -195,16 +212,20 @@ asmelfsym(void)
elfglobalsymndx = numelfsym;
genasmsym(putelfsym);
- for(s=allsym; s!=S; s=s->allsym) {
- if(s->type != SHOSTOBJ)
+ for(s=ctxt->allsym; s!=S; s=s->allsym) {
+ if(s->type != SHOSTOBJ && !(s->type == SDYNIMPORT && s->reachable))
continue;
- putelfsyment(putelfstr(s->name), 0, 0, (STB_GLOBAL<<4)|STT_NOTYPE, 0, 0);
+ if(s->type == SDYNIMPORT)
+ name = s->extname;
+ else
+ name = s->name;
+ putelfsyment(putelfstr(name), 0, 0, (STB_GLOBAL<<4)|STT_NOTYPE, 0, 0);
s->elfsym = numelfsym++;
}
}
static void
-putplan9sym(Sym *x, char *s, int t, vlong addr, vlong size, int ver, Sym *go)
+putplan9sym(LSym *x, char *s, int t, vlong addr, vlong size, int ver, LSym *go)
{
int i, l;
@@ -226,7 +247,7 @@ putplan9sym(Sym *x, char *s, int t, vlong addr, vlong size, int ver, Sym *go)
case 'Z':
case 'm':
l = 4;
- if(HEADTYPE == Hplan9x64 && !debug['8']) {
+ if(HEADTYPE == Hplan9 && thechar == '6' && !debug['8']) {
lputb(addr>>32);
l = 8;
}
@@ -263,48 +284,7 @@ asmplan9sym(void)
genasmsym(putplan9sym);
}
-static Sym *symt;
-
-static void
-scput(int b)
-{
- uchar *p;
-
- symgrow(symt, symt->size+1);
- p = symt->p + symt->size;
- *p = b;
- symt->size++;
-}
-
-static void
-slputb(int32 v)
-{
- uchar *p;
-
- symgrow(symt, symt->size+4);
- p = symt->p + symt->size;
- *p++ = v>>24;
- *p++ = v>>16;
- *p++ = v>>8;
- *p = v;
- symt->size += 4;
-}
-
-static void
-slputl(int32 v)
-{
- uchar *p;
-
- symgrow(symt, symt->size+4);
- p = symt->p + symt->size;
- *p++ = v;
- *p++ = v>>8;
- *p++ = v>>16;
- *p = v>>24;
- symt->size += 4;
-}
-
-static void (*slput)(int32);
+static LSym *symt;
void
wputl(ushort w)
@@ -352,112 +332,10 @@ vputl(uint64 v)
lputl(v >> 32);
}
-// Emit symbol table entry.
-// The table format is described at the top of ../../pkg/runtime/symtab.c.
-void
-putsymb(Sym *s, char *name, int t, vlong v, vlong size, int ver, Sym *typ)
-{
- int i, f, c;
- vlong v1;
- Reloc *rel;
-
- USED(size);
-
- // type byte
- if('A' <= t && t <= 'Z')
- c = t - 'A' + (ver ? 26 : 0);
- else if('a' <= t && t <= 'z')
- c = t - 'a' + 26;
- else {
- diag("invalid symbol table type %c", t);
- errorexit();
- return;
- }
-
- if(s != nil)
- c |= 0x40; // wide value
- if(typ != nil)
- c |= 0x80; // has go type
- scput(c);
-
- // value
- if(s != nil) {
- // full width
- rel = addrel(symt);
- rel->siz = PtrSize;
- rel->sym = s;
- rel->type = D_ADDR;
- rel->off = symt->size;
- if(PtrSize == 8)
- slput(0);
- slput(0);
- } else {
- // varint
- if(v < 0) {
- diag("negative value in symbol table: %s %lld", name, v);
- errorexit();
- }
- v1 = v;
- while(v1 >= 0x80) {
- scput(v1 | 0x80);
- v1 >>= 7;
- }
- scput(v1);
- }
-
- // go type if present
- if(typ != nil) {
- if(!typ->reachable)
- diag("unreachable type %s", typ->name);
- rel = addrel(symt);
- rel->siz = PtrSize;
- rel->sym = typ;
- rel->type = D_ADDR;
- rel->off = symt->size;
- if(PtrSize == 8)
- slput(0);
- slput(0);
- }
-
- // name
- if(t == 'f')
- name++;
-
- if(t == 'Z' || t == 'z') {
- scput(name[0]);
- for(i=1; name[i] != 0 || name[i+1] != 0; i += 2) {
- scput(name[i]);
- scput(name[i+1]);
- }
- scput(0);
- scput(0);
- } else {
- for(i=0; name[i]; i++)
- scput(name[i]);
- scput(0);
- }
-
- if(debug['n']) {
- if(t == 'z' || t == 'Z') {
- Bprint(&bso, "%c %.8llux ", t, v);
- for(i=1; name[i] != 0 || name[i+1] != 0; i+=2) {
- f = ((name[i]&0xff) << 8) | (name[i+1]&0xff);
- Bprint(&bso, "/%x", f);
- }
- Bprint(&bso, "\n");
- return;
- }
- if(ver)
- Bprint(&bso, "%c %.8llux %s<%d> %s\n", t, v, name, ver, typ ? typ->name : "");
- else
- Bprint(&bso, "%c %.8llux %s %s\n", t, v, name, typ ? typ->name : "");
- }
-}
-
void
symtab(void)
{
- Sym *s, *symtype, *symtypelink, *symgostring, *symgofunc;
+ LSym *s, *symtype, *symtypelink, *symgostring, *symgofunc;
dosymtype();
@@ -482,40 +360,40 @@ symtab(void)
xdefine("esymtab", SRODATA, 0);
// garbage collection symbols
- s = lookup("gcdata", 0);
+ s = linklookup(ctxt, "gcdata", 0);
s->type = SRODATA;
s->size = 0;
s->reachable = 1;
xdefine("egcdata", SRODATA, 0);
- s = lookup("gcbss", 0);
+ s = linklookup(ctxt, "gcbss", 0);
s->type = SRODATA;
s->size = 0;
s->reachable = 1;
xdefine("egcbss", SRODATA, 0);
// pseudo-symbols to mark locations of type, string, and go string data.
- s = lookup("type.*", 0);
+ s = linklookup(ctxt, "type.*", 0);
s->type = STYPE;
s->size = 0;
s->reachable = 1;
symtype = s;
- s = lookup("go.string.*", 0);
+ s = linklookup(ctxt, "go.string.*", 0);
s->type = SGOSTRING;
s->size = 0;
s->reachable = 1;
symgostring = s;
- s = lookup("go.func.*", 0);
+ s = linklookup(ctxt, "go.func.*", 0);
s->type = SGOFUNC;
s->size = 0;
s->reachable = 1;
symgofunc = s;
- symtypelink = lookup("typelink", 0);
+ symtypelink = linklookup(ctxt, "typelink", 0);
- symt = lookup("symtab", 0);
+ symt = linklookup(ctxt, "symtab", 0);
symt->type = SSYMTAB;
symt->size = 0;
symt->reachable = 1;
@@ -524,7 +402,7 @@ symtab(void)
// within a type they sort by size, so the .* symbols
// just defined above will be first.
// hide the specific symbols.
- for(s = allsym; s != S; s = s->allsym) {
+ for(s = ctxt->allsym; s != S; s = s->allsym) {
if(!s->reachable || s->special || s->type != SRODATA)
continue;
if(strncmp(s->name, "type.", 5) == 0) {
@@ -547,32 +425,12 @@ symtab(void)
s->hide = 1;
s->outer = symgofunc;
}
+ if(strncmp(s->name, "gcargs.", 7) == 0 || strncmp(s->name, "gclocals.", 9) == 0 || strncmp(s->name, "gclocals·", 10) == 0) {
+ s->type = SGOFUNC;
+ s->hide = 1;
+ s->outer = symgofunc;
+ s->align = 4;
+ liveness += (s->size+s->align-1)&~(s->align-1);
+ }
}
-
- if(debug['s'])
- return;
-
- switch(thechar) {
- default:
- diag("unknown architecture %c", thechar);
- errorexit();
- case '5':
- case '6':
- case '8':
- // little-endian symbol table
- slput = slputl;
- break;
- case 'v':
- // big-endian symbol table
- slput = slputb;
- break;
- }
- // new symbol table header.
- slput(0xfffffffd);
- scput(0);
- scput(0);
- scput(0);
- scput(PtrSize);
-
- genasmsym(putsymb);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-19 13:02:45 +0000