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go/src/cmd/6l/list.c
Russ Cox 19fd5c787f 5l, 6l, 8l: link pclntab and symtab as ordinary rodata symbols 
That is, move the pc/ln table and the symbol table
into the read-only data segment.  This eliminates
the need for a special load command to map the
symbol table into memory, which makes the
information available on systems that couldn't handle
the magic load to 0x99000000, like NaCl and ARM QEMU
and Linux without config_highmem=y.  It also
eliminates an #ifdef and some clumsy code to
find the symbol table on Windows.

The bad news is that the binary appears to be bigger
than it used to be.  This is not actually the case, though:
the same amount of data is being mapped into memory
as before, and the tables are still read-only, so they're
still shared across multiple instances of the binary as
they were before.  The difference is just that the tables
aren't squirreled away in some section that "size" doesn't
know to look at.

This is a checkpoint.
It probably breaks Windows and breaks NaCl more
than it used to be broken, but those will be fixed.
The logic involving -s needs to be revisited too.

Fixes #871.

R=ken2
CC=golang-dev
https://golang.org/cl/2587041
2010-10-19 18:07:19 -04:00

459 lines
7.9 KiB
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// Inferno utils/6l/list.c
// http://code.google.com/p/inferno-os/source/browse/utils/6l/list.c
//
// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
// Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
// Portions Copyright © 1997-1999 Vita Nuova Limited
// Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
// Portions Copyright © 2004,2006 Bruce Ellis
// Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
// Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
// Portions Copyright © 2009 The Go Authors. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
// Printing.
#include "l.h"
#include "../ld/lib.h"
static Prog* bigP;
void
listinit(void)
{
fmtinstall('R', Rconv);
fmtinstall('A', Aconv);
fmtinstall('D', Dconv);
fmtinstall('S', Sconv);
fmtinstall('P', Pconv);
fmtinstall('I', Iconv);
}
int
Pconv(Fmt *fp)
{
Prog *p;
p = va_arg(fp->args, Prog*);
bigP = p;
switch(p->as) {
case ATEXT:
if(p->from.scale) {
fmtprint(fp, "(%d) %A %D,%d,%D",
p->line, p->as, &p->from, p->from.scale, &p->to);
break;
}
default:
fmtprint(fp, "(%d) %A %D,%D",
p->line, p->as, &p->from, &p->to);
break;
case ADATA:
case AINIT_:
case ADYNT_:
fmtprint(fp, "(%d) %A %D/%d,%D",
p->line, p->as, &p->from, p->from.scale, &p->to);
break;
}
bigP = P;
return 0;
}
int
Aconv(Fmt *fp)
{
int i;
i = va_arg(fp->args, int);
return fmtstrcpy(fp, anames[i]);
}
int
Dconv(Fmt *fp)
{
char str[STRINGSZ], s[STRINGSZ];
Adr *a;
int i;
a = va_arg(fp->args, Adr*);
i = a->type;
if(fp->flags & FmtLong) {
if(i != D_CONST) {
// ATEXT dst is not constant
snprint(str, sizeof(str), "!!%D", a);
goto brk;
}
parsetextconst(a->offset);
if(textarg == 0) {
snprint(str, sizeof(str), "$%lld", textstksiz);
goto brk;
}
snprint(str, sizeof(str), "$%lld-%lld", textstksiz, textarg);
goto brk;
}
if(i >= D_INDIR) {
if(a->offset)
snprint(str, sizeof(str), "%lld(%R)", a->offset, i-D_INDIR);
else
snprint(str, sizeof(str), "(%R)", i-D_INDIR);
goto brk;
}
switch(i) {
default:
if(a->offset)
snprint(str, sizeof(str), "$%lld,%R", a->offset, i);
else
snprint(str, sizeof(str), "%R", i);
break;
case D_NONE:
str[0] = 0;
break;
case D_BRANCH:
if(bigP != P && bigP->pcond != P)
if(a->sym != S)
snprint(str, sizeof(str), "%llux+%s", bigP->pcond->pc,
a->sym->name);
else
snprint(str, sizeof(str), "%llux", bigP->pcond->pc);
else
snprint(str, sizeof(str), "%lld(PC)", a->offset);
break;
case D_EXTERN:
if(a->sym) {
snprint(str, sizeof(str), "%s+%lld(SB)", a->sym->name, a->offset);
break;
}
snprint(str, sizeof(str), "!!noname!!+%lld(SB)", a->offset);
break;
case D_STATIC:
if(a->sym) {
snprint(str, sizeof(str), "%s<%d>+%lld(SB)", a->sym->name,
a->sym->version, a->offset);
break;
}
snprint(str, sizeof(str), "!!noname!!<999>+%lld(SB)", a->offset);
break;
case D_AUTO:
if(a->sym) {
snprint(str, sizeof(str), "%s+%lld(SP)", a->sym->name, a->offset);
break;
}
snprint(str, sizeof(str), "!!noname!!+%lld(SP)", a->offset);
break;
case D_PARAM:
if(a->sym) {
snprint(str, sizeof(str), "%s+%lld(%s)", a->sym->name, a->offset, paramspace);
break;
}
snprint(str, sizeof(str), "!!noname!!+%lld(%s)", a->offset, paramspace);
break;
case D_CONST:
snprint(str, sizeof(str), "$%lld", a->offset);
break;
case D_FCONST:
snprint(str, sizeof(str), "$(%.8ux,%.8ux)", a->ieee.h, a->ieee.l);
break;
case D_SCONST:
snprint(str, sizeof(str), "$\"%S\"", a->scon);
break;
case D_ADDR:
a->type = a->index;
a->index = D_NONE;
snprint(str, sizeof(str), "$%D", a);
a->index = a->type;
a->type = D_ADDR;
goto conv;
}
brk:
if(a->index != D_NONE) {
snprint(s, sizeof(s), "(%R*%d)", a->index, a->scale);
strcat(str, s);
}
conv:
fmtstrcpy(fp, str);
// if(a->gotype)
// fmtprint(fp, "«%s»", a->gotype->name);
return 0;
}
char* regstr[] =
{
"AL", /* [D_AL] */
"CL",
"DL",
"BL",
"SPB",
"BPB",
"SIB",
"DIB",
"R8B",
"R9B",
"R10B",
"R11B",
"R12B",
"R13B",
"R14B",
"R15B",
"AX", /* [D_AX] */
"CX",
"DX",
"BX",
"SP",
"BP",
"SI",
"DI",
"R8",
"R9",
"R10",
"R11",
"R12",
"R13",
"R14",
"R15",
"AH",
"CH",
"DH",
"BH",
"F0", /* [D_F0] */
"F1",
"F2",
"F3",
"F4",
"F5",
"F6",
"F7",
"M0",
"M1",
"M2",
"M3",
"M4",
"M5",
"M6",
"M7",
"X0",
"X1",
"X2",
"X3",
"X4",
"X5",
"X6",
"X7",
"X8",
"X9",
"X10",
"X11",
"X12",
"X13",
"X14",
"X15",
"CS", /* [D_CS] */
"SS",
"DS",
"ES",
"FS",
"GS",
"GDTR", /* [D_GDTR] */
"IDTR", /* [D_IDTR] */
"LDTR", /* [D_LDTR] */
"MSW", /* [D_MSW] */
"TASK", /* [D_TASK] */
"CR0", /* [D_CR] */
"CR1",
"CR2",
"CR3",
"CR4",
"CR5",
"CR6",
"CR7",
"CR8",
"CR9",
"CR10",
"CR11",
"CR12",
"CR13",
"CR14",
"CR15",
"DR0", /* [D_DR] */
"DR1",
"DR2",
"DR3",
"DR4",
"DR5",
"DR6",
"DR7",
"TR0", /* [D_TR] */
"TR1",
"TR2",
"TR3",
"TR4",
"TR5",
"TR6",
"TR7",
"NONE", /* [D_NONE] */
};
int
Rconv(Fmt *fp)
{
char str[STRINGSZ];
int r;
r = va_arg(fp->args, int);
if(r >= D_AL && r <= D_NONE)
snprint(str, sizeof(str), "%s", regstr[r-D_AL]);
else
snprint(str, sizeof(str), "gok(%d)", r);
return fmtstrcpy(fp, str);
}
int
Sconv(Fmt *fp)
{
int i, c;
char str[STRINGSZ], *p, *a;
a = va_arg(fp->args, char*);
p = str;
for(i=0; i<sizeof(double); i++) {
c = a[i] & 0xff;
if(c >= 'a' && c <= 'z' ||
c >= 'A' && c <= 'Z' ||
c >= '0' && c <= '9') {
*p++ = c;
continue;
}
*p++ = '\\';
switch(c) {
default:
if(c < 040 || c >= 0177)
break; /* not portable */
p[-1] = c;
continue;
case 0:
*p++ = 'z';
continue;
case '\\':
case '"':
*p++ = c;
continue;
case '\n':
*p++ = 'n';
continue;
case '\t':
*p++ = 't';
continue;
}
*p++ = (c>>6) + '0';
*p++ = ((c>>3) & 7) + '0';
*p++ = (c & 7) + '0';
}
*p = 0;
return fmtstrcpy(fp, str);
}
int
Iconv(Fmt *fp)
{
int i, n;
uchar *p;
char *s;
Fmt fmt;
n = fp->prec;
fp->prec = 0;
if(!(fp->flags&FmtPrec) || n < 0)
return fmtstrcpy(fp, "%I");
fp->flags &= ~FmtPrec;
p = va_arg(fp->args, uchar*);
// format into temporary buffer and
// call fmtstrcpy to handle padding.
fmtstrinit(&fmt);
for(i=0; i<n; i++)
fmtprint(&fmt, "%.2ux", *p++);
s = fmtstrflush(&fmt);
fmtstrcpy(fp, s);
free(s);
return 0;
}
void
diag(char *fmt, ...)
{
char buf[STRINGSZ], *tn, *sep;
va_list arg;
tn = "";
sep = "";
if(cursym != S) {
tn = cursym->name;
sep = ": ";
}
va_start(arg, fmt);
vseprint(buf, buf+sizeof(buf), fmt, arg);
va_end(arg);
print("%s%s%s\n", tn, sep, buf);
nerrors++;
if(nerrors > 20) {
print("too many errors\n");
errorexit();
}
}
void
parsetextconst(vlong arg)
{
textstksiz = arg & 0xffffffffLL;
if(textstksiz & 0x80000000LL)
textstksiz = -(-textstksiz & 0xffffffffLL);
textarg = (arg >> 32) & 0xffffffffLL;
if(textarg & 0x80000000LL)
textarg = 0;
textarg = (textarg+7) & ~7LL;
}
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