2010-10-13 13:51:21 -06:00
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// Inferno utils/6l/span.c
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// http://code.google.com/p/inferno-os/source/browse/utils/6l/span.c
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//
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// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
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// Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
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// Portions Copyright © 1997-1999 Vita Nuova Limited
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// Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
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// Portions Copyright © 2004,2006 Bruce Ellis
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// Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
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// Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
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// Portions Copyright © 2009 The Go Authors. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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// Symbol table.
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#include "l.h"
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#include "../ld/lib.h"
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#include "../ld/elf.h"
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char *elfstrdat;
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int elfstrsize;
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int maxelfstr;
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void genasmsym(void (*put)(char*, int, vlong, vlong, int, Sym*));
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int
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putelfstr(char *s)
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{
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int off, n;
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if(elfstrsize == 0 && s[0] != 0) {
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// first entry must be empty string
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putelfstr("");
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}
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n = strlen(s)+1;
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if(elfstrsize+n > maxelfstr) {
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maxelfstr = 2*(elfstrsize+n+(1<<20));
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elfstrdat = realloc(elfstrdat, maxelfstr);
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}
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off = elfstrsize;
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elfstrsize += n;
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memmove(elfstrdat+off, s, n);
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return off;
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}
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void
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putelfsymb(char *s, int t, vlong addr, vlong size, int ver, Sym *go)
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{
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int bind, type, shndx, stroff;
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bind = STB_GLOBAL;
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switch(t) {
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default:
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return;
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case 'T':
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type = STT_FUNC;
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shndx = elftextsh + 0;
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break;
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case 'D':
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type = STT_OBJECT;
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shndx = elftextsh + 1;
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break;
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case 'B':
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type = STT_OBJECT;
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shndx = elftextsh + 2;
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break;
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}
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stroff = putelfstr(s);
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lputl(stroff); // string
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cput((bind<<4)|(type&0xF));
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cput(0);
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wputl(shndx);
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vputl(addr);
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vputl(size);
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}
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void
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asmelfsym(void)
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{
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genasmsym(putelfsymb);
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}
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void
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putsymb(char *s, int t, vlong v, vlong size, int ver, Sym *go)
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{
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int i, f, l;
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vlong gv;
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if(t == 'f')
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s++;
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l = 4;
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if(!debug['8']){
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lputb(v>>32);
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l = 8;
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}
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lputb(v);
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if(ver)
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t += 'a' - 'A';
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cput(t+0x80); /* 0x80 is variable length */
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if(t == 'Z' || t == 'z') {
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cput(s[0]);
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for(i=1; s[i] != 0 || s[i+1] != 0; i += 2) {
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cput(s[i]);
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cput(s[i+1]);
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}
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cput(0);
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cput(0);
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i++;
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}
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else {
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for(i=0; s[i]; i++)
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cput(s[i]);
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cput(0);
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}
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gv = 0;
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if(go) {
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if(!go->reachable)
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diag("unreachable type %s", go->name);
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gv = go->value+INITDAT;
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}
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if(l == 8)
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lputb(gv>>32);
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lputb(gv);
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symsize += l + 1 + i+1 + l;
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if(debug['n']) {
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if(t == 'z' || t == 'Z') {
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Bprint(&bso, "%c %.8llux ", t, v);
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for(i=1; s[i] != 0 || s[i+1] != 0; i+=2) {
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f = ((s[i]&0xff) << 8) | (s[i+1]&0xff);
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Bprint(&bso, "/%x", f);
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}
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Bprint(&bso, "\n");
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return;
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}
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if(ver)
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Bprint(&bso, "%c %.8llux %s<%d> %s (%.8llux)\n", t, v, s, ver, go ? go->name : "", gv);
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else
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Bprint(&bso, "%c %.8llux %s %s (%.8llux)\n", t, v, s, go ? go->name : "", gv);
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}
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}
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void
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genasmsym(void (*put)(char*, int, vlong, vlong, int, Sym*))
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{
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Auto *a;
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Sym *s;
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int h;
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s = lookup("etext", 0);
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if(s->type == STEXT)
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put(s->name, 'T', s->value, s->size, s->version, 0);
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for(h=0; h<NHASH; h++) {
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for(s=hash[h]; s!=S; s=s->hash) {
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switch(s->type) {
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case SCONST:
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case SRODATA:
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case SDATA:
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case SELFDATA:
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if(!s->reachable)
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continue;
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2010-10-14 21:48:40 -06:00
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put(s->name, 'D', symaddr(s), s->size, s->version, s->gotype);
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2010-10-13 13:51:21 -06:00
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continue;
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case SBSS:
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if(!s->reachable)
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continue;
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2010-10-14 21:48:40 -06:00
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put(s->name, 'B', symaddr(s), s->size, s->version, s->gotype);
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2010-10-13 13:51:21 -06:00
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continue;
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case SFIXED:
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put(s->name, 'B', s->value, s->size, s->version, s->gotype);
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continue;
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case SFILE:
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put(s->name, 'f', s->value, 0, s->version, 0);
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continue;
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}
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}
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}
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for(s = textp; s != nil; s = s->next) {
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/* filenames first */
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for(a=s->autom; a; a=a->link)
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if(a->type == D_FILE)
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put(a->asym->name, 'z', a->aoffset, 0, 0, 0);
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else
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if(a->type == D_FILE1)
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put(a->asym->name, 'Z', a->aoffset, 0, 0, 0);
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put(s->name, 'T', s->value, s->size, s->version, s->gotype);
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/* frame, auto and param after */
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put(".frame", 'm', s->text->to.offset+8, 0, 0, 0);
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for(a=s->autom; a; a=a->link)
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if(a->type == D_AUTO)
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put(a->asym->name, 'a', -a->aoffset, 0, 0, a->gotype);
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else
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if(a->type == D_PARAM)
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put(a->asym->name, 'p', a->aoffset, 0, 0, a->gotype);
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}
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if(debug['v'] || debug['n'])
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2010-10-13 14:20:22 -06:00
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Bprint(&bso, "symsize = %ud\n", symsize);
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2010-10-13 13:51:21 -06:00
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Bflush(&bso);
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}
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void
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asmsym(void)
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{
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genasmsym(putsymb);
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}
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