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5l, 6l, 8l: separate pass to fix addresses

Browse Source 
Lay out code before data.

R=ken2
CC=golang-dev
https://golang.org/cl/2490043
This commit is contained in:
Russ Cox 2010-10-19 13:08:17 -04:00
parent 54aba2e6dd
commit 01df088f8d
19 changed files with 284 additions and 380 deletions
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45
src/cmd/5l/asm.c
View File

@ -305,42 +305,29 @@ asmb(void)
symo = 0;
if(debug['v'])
Bprint(&bso, "%5.2f asm\n", cputime());
Bprint(&bso, "%5.2f asmb\n", cputime());
Bflush(&bso);
OFFSET = HEADR;
seek(cout, OFFSET, 0);
pc = INITTEXT;
codeblk(pc, segtext.sect->len);
pc += segtext.sect->len;
if(seek(cout, 0, 1) != pc - segtext.vaddr + segtext.fileoff)
diag("text phase error");
sect = segtext.sect;
seek(cout, sect->vaddr - segtext.vaddr + segtext.fileoff, 0);
codeblk(sect->vaddr, sect->len);
/* output read-only data in text segment */
sect = segtext.sect->next;
seek(cout, sect->vaddr - segtext.vaddr + segtext.fileoff, 0);
datblk(sect->vaddr, sect->len);
/* output data segment */
cursym = nil;
switch(HEADTYPE) {
case 0:
case 1:
case 2:
case 5:
OFFSET = HEADR+textsize;
seek(cout, OFFSET, 0);
break;
case 3:
OFFSET = rnd(HEADR+textsize, 4096);
seek(cout, OFFSET, 0);
break;
case 6:
OFFSET = rnd(segtext.fileoff+segtext.filelen, INITRND);
seek(cout, OFFSET, 0);
break;
}
segdata.fileoff = seek(cout, 0, 1);
datblk(INITDAT, segdata.filelen);
if(debug['v'])
Bprint(&bso, "%5.2f datblk\n", cputime());
Bflush(&bso);
seek(cout, segdata.fileoff, 0);
datblk(segdata.vaddr, segdata.filelen);
/* output read-only data in text segment */
sect = segtext.sect->next;
seek(cout, sect->vaddr - segtext.vaddr + segtext.fileoff, 0);
datblk(sect->vaddr, sect->len);
/* output symbol table */
symsize = 0;

5
src/cmd/5l/l.h
View File

@ -45,6 +45,8 @@ enum
/* do not undefine this - code will be removed eventually */
#define CALLEEBX
#define dynptrsize 0
typedef struct Adr Adr;
typedef struct Sym Sym;
typedef struct Autom Auto;
@ -262,7 +264,7 @@ enum
C_HREG,
C_OFFPC, /* thumb */
C_ADDR, /* relocatable address */
C_ADDR, /* reference to relocatable address */
C_GOK,
@ -369,6 +371,7 @@ EXTERN Prog* prog_modu;
int Aconv(Fmt*);
int Cconv(Fmt*);
int Dconv(Fmt*);
int Iconv(Fmt*);
int Nconv(Fmt*);
int Oconv(Fmt*);
int Pconv(Fmt*);

30
src/cmd/5l/list.c
View File

@ -44,6 +44,7 @@ listinit(void)
fmtinstall('S', Sconv);
fmtinstall('N', Nconv);
fmtinstall('O', Oconv); // C_type constants
fmtinstall('I', Iconv);
}
void
@ -374,6 +375,35 @@ Sconv(Fmt *fp)
return fmtstrcpy(fp, str);
}
int
Iconv(Fmt *fp)
{
int i, n;
uint32 *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, uint32*);
// format into temporary buffer and
// call fmtstrcpy to handle padding.
fmtstrinit(&fmt);
for(i=0; i<n/4; i++) {
if(i > 0)
fmtprint(&fmt, " ");
fmtprint(&fmt, "%.8ux", *p++);
}
s = fmtstrflush(&fmt);
fmtstrcpy(fp, s);
free(s);
return 0;
}
static char*
cnames[] =
{

3
src/cmd/5l/obj.c
View File

@ -255,11 +255,12 @@ main(int argc, char *argv[])
else
doprof2();
doelf();
dodata();
follow();
softfloat();
noops();
span();
dodata();
address();
reloc();
asmb();
undef();

85
src/cmd/5l/span.c
View File

@ -169,16 +169,13 @@ span(void)
int m, bflag, i, v;
int32 c, otxt, out[6];
int lastthumb = -1;
Section *rosect, *sect;
Sym *sym;
Section *sect;
uchar *bp;
if(debug['v'])
Bprint(&bso, "%5.2f span\n", cputime());
Bflush(&bso);
xdefine("etext", STEXT, 0);
bflag = 0;
c = INITTEXT;
op = nil;
@ -202,6 +199,7 @@ span(void)
pool.extra += brextra(p);
for(op = p, p = p->link; p != P; op = p, p = p->link) {
curp = p;
setarch(p);
p->pc = c;
o = oplook(p);
@ -256,6 +254,7 @@ span(void)
for(cursym = textp; cursym != nil; cursym = cursym->next) {
cursym->value = c;
for(p = cursym->text; p != P; p = p->link) {
curp = p;
setarch(p);
p->pc = c;
if(thumb && isbranch(p))
@ -319,6 +318,7 @@ span(void)
for(cursym = textp; cursym != nil; cursym = cursym->next) {
cursym->value = c;
for(p = cursym->text; p != P; oop = op, op = p, p = p->link) {
curp = p;
setarch(p);
if(p->pc != c)
again = 1;
@ -369,8 +369,6 @@ span(void)
}
}
c = rnd(c, 8);
xdefine("etext", STEXT, c);
textsize = c - INITTEXT;
/*
* lay out the code. all the pc-relative code references,
@ -388,6 +386,7 @@ span(void)
bp = cursym->p;
for(p = p->link; p != P; p = p->link) {
curp = p;
pc = p->pc;
curp = p;
o = oplook(p);
@ -401,55 +400,9 @@ span(void)
}
}
}
rosect = segtext.sect->next;
if(rosect) {
if(INITRND)
c = rnd(c, INITRND);
rosect->vaddr = c;
c += rosect->len;
}
if(INITRND)
INITDAT = rnd(c, INITRND);
if(debug['v'])
Bprint(&bso, "tsize = %ux\n", textsize);
Bflush(&bso);
segtext.rwx = 05;
segtext.vaddr = INITTEXT - HEADR;
segtext.len = INITDAT - INITTEXT + HEADR;
segtext.filelen = segtext.len;
sect = segtext.sect;
sect = addsection(&segtext, ".text", 05);
sect->vaddr = INITTEXT;
sect->len = textsize;
// Adjust everything now that we know INITDAT.
// This will get simpler when everything is relocatable
// and we can run span before dodata.
segdata.vaddr += INITDAT;
for(sect=segdata.sect; sect!=nil; sect=sect->next)
sect->vaddr += INITDAT;
xdefine("data", SBSS, INITDAT);
xdefine("edata", SBSS, INITDAT+segdata.filelen);
xdefine("end", SBSS, INITDAT+segdata.len);
for(sym=datap; sym!=nil; sym=sym->next) {
switch(sym->type) {
case SELFDATA:
case SRODATA:
sym->value += rosect->vaddr;
break;
case SDATA:
case SBSS:
sym->value += INITDAT;
break;
}
}
sect->len = c - INITTEXT;
}
/*
@ -694,13 +647,9 @@ aclass(Adr *a)
}
s = a->sym;
t = s->type;
if(t == 0 || t == SXREF) {
diag("undefined external: %s in %s",
s->name, TNAME);
s->type = SDATA;
}
instoffset = s->value + a->offset;
instoffset = 0; // s.b. unused but just in case
return C_ADDR;
case D_AUTO:
instoffset = autosize + a->offset;
t = immaddr(instoffset);
@ -755,13 +704,8 @@ aclass(Adr *a)
case D_STATIC:
s = a->sym;
t = s->type;
if(t == 0 || t == SXREF) {
diag("undefined external: %s in %s",
s->name, TNAME);
s->type = SDATA;
}
instoffset = symaddr(s) + a->offset;
return C_LCON;
instoffset = 0; // s.b. unused but just in case
return C_ADDR;
}
return C_GOK;
@ -791,12 +735,7 @@ aclass(Adr *a)
if(s == S)
break;
t = s->type;
if(t == 0 || t == SXREF) {
diag("undefined external: %s in %s",
s->name, TNAME);
s->type = SDATA;
}
instoffset = symaddr(s) + a->offset;
instoffset = 0; // s.b. unused but just in case
return C_LCON;
case D_AUTO:

65
src/cmd/6l/asm.c
View File

@ -344,7 +344,7 @@ phsh(ElfPhdr *ph, ElfShdr *sh)
void
asmb(void)
{
int32 v, magic;
int32 magic;
int a, dynsym;
vlong vl, va, startva, fo, w, symo, elfsymo, elfstro, elfsymsize, machlink;
vlong symdatva = SYMDATVA;
@ -357,45 +357,47 @@ asmb(void)
Bprint(&bso, "%5.2f asmb\n", cputime());
Bflush(&bso);
segtext.fileoff = 0;
elftextsh = 0;
elfsymsize = 0;
elfstro = 0;
elfsymo = 0;
seek(cout, HEADR, 0);
pc = INITTEXT;
codeblk(pc, segtext.sect->len);
pc += segtext.sect->len;
if(debug['v'])
Bprint(&bso, "%5.2f codeblk\n", cputime());
Bflush(&bso);
sect = segtext.sect;
seek(cout, sect->vaddr - segtext.vaddr + segtext.fileoff, 0);
codeblk(sect->vaddr, sect->len);
/* output read-only data in text segment */
sect = segtext.sect->next;
datblk(pc, sect->vaddr + sect->len - pc);
seek(cout, sect->vaddr - segtext.vaddr + segtext.fileoff, 0);
datblk(sect->vaddr, sect->len);
if(debug['v'])
Bprint(&bso, "%5.2f datblk\n", cputime());
Bflush(&bso);
seek(cout, segdata.fileoff, 0);
datblk(segdata.vaddr, segdata.filelen);
machlink = 0;
if(HEADTYPE == 6)
machlink = domacholink();
switch(HEADTYPE) {
default:
diag("unknown header type %d", HEADTYPE);
case 2:
case 5:
seek(cout, HEADR+textsize, 0);
break;
case 6:
debug['8'] = 1; /* 64-bit addresses */
v = HEADR+textsize;
seek(cout, v, 0);
v = rnd(v, 4096) - v;
while(v > 0) {
cput(0);
v--;
}
cflush();
break;
case 7:
case 9:
debug['8'] = 1; /* 64-bit addresses */
v = rnd(HEADR+textsize, INITRND);
seek(cout, v, 0);
/* index of elf text section; needed by asmelfsym, double-checked below */
/* !debug['d'] causes 8 extra sections before the .text section */
elftextsh = 1;
@ -404,17 +406,6 @@ asmb(void)
break;
}
if(debug['v'])
Bprint(&bso, "%5.2f datblk\n", cputime());
Bflush(&bso);
segdata.fileoff = seek(cout, 0, 1);
datblk(INITDAT, segdata.filelen);
machlink = 0;
if(HEADTYPE == 6)
machlink = domacholink();
symsize = 0;
spsize = 0;
lcsize = 0;
@ -428,14 +419,14 @@ asmb(void)
case 2:
case 5:
debug['s'] = 1;
symo = HEADR+textsize+segdata.filelen;
symo = HEADR+segtext.len+segdata.filelen;
break;
case 6:
symo = rnd(HEADR+textsize, INITRND)+rnd(segdata.filelen, INITRND)+machlink;
symo = rnd(HEADR+segtext.len, INITRND)+rnd(segdata.filelen, INITRND)+machlink;
break;
case 7:
case 9:
symo = rnd(HEADR+textsize, INITRND)+segdata.filelen;
symo = rnd(HEADR+segtext.len, INITRND)+segdata.filelen;
symo = rnd(symo, INITRND);
break;
}
@ -490,7 +481,7 @@ asmb(void)
magic = 4*26*26+7;
magic |= 0x00008000; /* fat header */
lputb(magic); /* magic */
lputb(textsize); /* sizes */
lputb(segtext.filelen); /* sizes */
lputb(segdata.filelen);
lputb(segdata.len - segdata.filelen);
lputb(symsize); /* nsyms */
@ -503,7 +494,7 @@ asmb(void)
case 3: /* plan9 */
magic = 4*26*26+7;
lputb(magic); /* magic */
lputb(textsize); /* sizes */
lputb(segtext.filelen); /* sizes */
lputb(segdata.filelen);
lputb(segdata.len - segdata.filelen);
lputb(symsize); /* nsyms */
@ -522,7 +513,7 @@ asmb(void)
fo = HEADR;
startva = INITTEXT - HEADR;
va = startva + fo;
w = textsize;
w = segtext.filelen;
/* This null SHdr must appear before all others */
sh = newElfShdr(elfstr[ElfStrEmpty]);

4
src/cmd/6l/l.h
View File

@ -310,9 +310,9 @@ EXTERN union
EXTERN int32 HEADR;
EXTERN int32 HEADTYPE;
EXTERN vlong INITDAT;
EXTERN int32 INITRND;
EXTERN vlong INITTEXT;
EXTERN vlong INITDAT;
EXTERN char* INITENTRY; /* entry point */
EXTERN Biobuf bso;
EXTERN int cbc;
@ -344,7 +344,6 @@ EXTERN char* rpath;
EXTERN int32 spsize;
EXTERN Sym* symlist;
EXTERN int32 symsize;
EXTERN vlong textsize;
EXTERN int tlsoffset;
EXTERN int version;
EXTERN Prog zprg;
@ -367,6 +366,7 @@ extern char* anames[];
int Aconv(Fmt*);
int Dconv(Fmt*);
int Iconv(Fmt*);
int Pconv(Fmt*);
int Rconv(Fmt*);
int Sconv(Fmt*);

27
src/cmd/6l/list.c
View File

@ -44,6 +44,7 @@ listinit(void)
fmtinstall('D', Dconv);
fmtinstall('S', Sconv);
fmtinstall('P', Pconv);
fmtinstall('I', Iconv);
}
int
@ -393,6 +394,32 @@ Sconv(Fmt *fp)
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, "%.8ux", *p++);
s = fmtstrflush(&fmt);
fmtstrcpy(fp, s);
free(s);
return 0;
}
void
diag(char *fmt, ...)
{

3
src/cmd/6l/obj.c
View File

@ -237,7 +237,6 @@ main(int argc, char *argv[])
doelf();
if(HEADTYPE == 6)
domacho();
dodata();
dostkoff();
paramspace = "SP"; /* (FP) now (SP) on output */
if(debug['p'])
@ -246,6 +245,8 @@ main(int argc, char *argv[])
else
doprof2();
span();
dodata();
address();
reloc();
asmb();
undef();

62
src/cmd/6l/span.c
View File

@ -137,19 +137,11 @@ span(void)
int32 v;
vlong c;
int n;
Sym *s;
Section *sect, *rosect;
Section *sect;
if(debug['v'])
Bprint(&bso, "%5.2f span\n", cputime());
segtext.rwx = 05;
segtext.vaddr = INITTEXT - HEADR;
xdefine("etext", STEXT, 0L);
xdefine("rodata", SRODATA, 0L);
xdefine("erodata", SRODATA, 0L);
// NOTE(rsc): If we get rid of the globals we should
// be able to parallelize these iterations.
for(cursym = textp; cursym != nil; cursym = cursym->next) {
@ -184,7 +176,7 @@ span(void)
// Could parallelize here too, by assigning to text
// and then letting threads copy down, but probably not worth it.
c = INITTEXT;
sect = segtext.sect;
sect = addsection(&segtext, ".text", 05);
sect->vaddr = c;
for(cursym = textp; cursym != nil; cursym = cursym->next) {
cursym->value = c;
@ -193,53 +185,6 @@ span(void)
c += cursym->size;
}
sect->len = c - sect->vaddr;
xdefine("etext", STEXT, c);
if(debug['v'])
Bprint(&bso, "etext = %llux\n", c);
xdefine("rodata", SRODATA, c);
if(INITRND)
c = rnd(c, INITRND);
rosect = segtext.sect->next;
rosect->vaddr = c;
c += rosect->len;
xdefine("erodata", SRODATA, c);
textsize = c - INITTEXT;
if(debug['v'])
Bprint(&bso, "erodata = %llux", c);
Bflush(&bso);
segtext.len = c - segtext.vaddr;
segtext.filelen = segtext.len;
if(INITRND)
c = rnd(c, INITRND);
INITDAT = c;
// Adjust everything now that we know INITDAT.
// This will get simpler when everything is relocatable
// and we can run span before dodata.
segdata.vaddr += INITDAT;
for(sect=segdata.sect; sect!=nil; sect=sect->next)
sect->vaddr += INITDAT;
xdefine("data", SBSS, INITDAT);
xdefine("edata", SBSS, INITDAT+segdata.filelen);
xdefine("end", SBSS, INITDAT+segdata.len);
for(s=datap; s!=nil; s=s->next) {
switch(s->type) {
case SELFDATA:
case SRODATA:
s->value += rosect->vaddr;
break;
case SDATA:
case SBSS:
s->value += INITDAT;
break;
}
}
}
void
@ -250,6 +195,7 @@ xdefine(char *p, int t, vlong v)
s = lookup(p, 0);
s->type = t;
s->value = v;
s->reachable = 1;
}
void
@ -729,7 +675,7 @@ symaddr(Sym *s)
return s->value;
case SMACHO:
return INITDAT + segdata.filelen - dynptrsize + s->value;
return segdata.vaddr + segdata.filelen - dynptrsize + s->value;
default:
if(!s->reachable)

121
src/cmd/8l/asm.c
View File

@ -335,7 +335,6 @@ asmb(void)
int32 v, magic;
int a, dynsym;
uint32 va, fo, w, symo, startva, machlink;
ulong expectpc;
ElfEhdr *eh;
ElfPhdr *ph, *pph;
ElfShdr *sh;
@ -345,77 +344,23 @@ asmb(void)
Bprint(&bso, "%5.2f asmb\n", cputime());
Bflush(&bso);
seek(cout, HEADR, 0);
pc = INITTEXT;
codeblk(pc, segtext.sect->len);
pc += segtext.sect->len;
sect = segtext.sect;
seek(cout, sect->vaddr - segtext.vaddr + segtext.fileoff, 0);
codeblk(sect->vaddr, sect->len);
if(HEADTYPE == 8) {
int32 etext;
etext = rnd(segtext.vaddr + segtext.filelen, 4096);
while(pc < etext) {
cput(0xf4); // hlt
pc++;
}
pc = segrodata.vaddr;
cflush();
}
// TODO: NaCl: pad with HLT
/* output read-only data in text segment */
sect = segtext.sect->next;
datblk(pc, sect->vaddr + sect->len - pc);
switch(HEADTYPE) {
default:
if(iself)
goto Elfseek;
diag("unknown header type %d", HEADTYPE);
case 0:
seek(cout, rnd(HEADR+textsize, 8192), 0);
break;
case 1:
textsize = rnd(HEADR+textsize, 4096)-HEADR;
seek(cout, textsize+HEADR, 0);
break;
case 2:
seek(cout, HEADR+textsize, 0);
break;
case 3:
case 4:
seek(cout, HEADR+rnd(textsize, INITRND), 0);
break;
case 6:
v = HEADR+textsize;
seek(cout, v, 0);
v = rnd(v, 4096) - v;
while(v > 0) {
cput(0);
v--;
}
cflush();
break;
case 8:
// Native Client only needs to round
// text segment file address to 4096 bytes,
// but text segment memory address rounds
// to INITRND (65536).
v = rnd(segrodata.fileoff+segrodata.filelen, 4096);
seek(cout, v, 0);
break;
Elfseek:
case 10:
v = rnd(segtext.fileoff+segtext.filelen, INITRND);
seek(cout, v, 0);
break;
}
seek(cout, sect->vaddr - segtext.vaddr + segtext.fileoff, 0);
datblk(sect->vaddr, sect->len);
if(debug['v'])
Bprint(&bso, "%5.2f datblk\n", cputime());
Bflush(&bso);
segdata.fileoff = seek(cout, 0, 1);
datblk(INITDAT, segdata.filelen);
seek(cout, segdata.fileoff, 0);
datblk(segdata.vaddr, segdata.filelen);
machlink = 0;
if(HEADTYPE == 6)
@ -434,26 +379,26 @@ asmb(void)
if(iself)
goto Elfsym;
case 0:
seek(cout, rnd(HEADR+textsize, 8192)+segdata.filelen, 0);
seek(cout, rnd(HEADR+segtext.filelen, 8192)+segdata.filelen, 0);
break;
case 1:
seek(cout, rnd(HEADR+textsize, INITRND)+segdata.filelen, 0);
seek(cout, rnd(HEADR+segtext.filelen, INITRND)+segdata.filelen, 0);
break;
case 2:
seek(cout, HEADR+textsize+segdata.filelen, 0);
symo = HEADR+textsize+segdata.filelen;
seek(cout, HEADR+segtext.filelen+segdata.filelen, 0);
symo = HEADR+segtext.filelen+segdata.filelen;
break;
case 3:
case 4:
debug['s'] = 1;
symo = HEADR+textsize+segdata.filelen;
symo = HEADR+segtext.filelen+segdata.filelen;
break;
case 6:
symo = rnd(HEADR+textsize, INITRND)+rnd(segdata.filelen, INITRND)+machlink;
symo = rnd(HEADR+segtext.filelen, INITRND)+rnd(segdata.filelen, INITRND)+machlink;
break;
Elfsym:
case 10:
symo = rnd(HEADR+textsize, INITRND)+segdata.filelen;
symo = rnd(HEADR+segtext.filelen, INITRND)+segdata.filelen;
symo = rnd(symo, INITRND);
break;
}
@ -493,17 +438,17 @@ asmb(void)
case 0: /* garbage */
lput(0x160L<<16); /* magic and sections */
lput(0L); /* time and date */
lput(rnd(HEADR+textsize, 4096)+segdata.filelen);
lput(rnd(HEADR+segtext.filelen, 4096)+segdata.filelen);
lput(symsize); /* nsyms */
lput((0x38L<<16)|7L); /* size of optional hdr and flags */
lput((0413<<16)|0437L); /* magic and version */
lput(rnd(HEADR+textsize, 4096)); /* sizes */
lput(rnd(HEADR+segtext.filelen, 4096)); /* sizes */
lput(segdata.filelen);
lput(segdata.len - segdata.filelen);
lput(entryvalue()); /* va of entry */
lput(INITTEXT-HEADR); /* va of base of text */
lput(INITDAT); /* va of base of data */
lput(INITDAT+segdata.filelen); /* va of base of bss */
lput(segdata.vaddr); /* va of base of data */
lput(segdata.vaddr+segdata.filelen); /* va of base of bss */
lput(~0L); /* gp reg mask */
lput(0L);
lput(0L);
@ -525,19 +470,19 @@ asmb(void)
* a.out header
*/
lputl(0x10b); /* magic, version stamp */
lputl(rnd(textsize, INITRND)); /* text sizes */
lputl(rnd(segtext.filelen, INITRND)); /* text sizes */
lputl(segdata.filelen); /* data sizes */
lputl(segdata.len - segdata.filelen); /* bss sizes */
lput(entryvalue()); /* va of entry */
lputl(INITTEXT); /* text start */
lputl(INITDAT); /* data start */
lputl(segdata.vaddr); /* data start */
/*
* text section header
*/
s8put(".text");
lputl(HEADR); /* pa */
lputl(HEADR); /* va */
lputl(textsize); /* text size */
lputl(segtext.filelen); /* text size */
lputl(HEADR); /* file offset */
lputl(0); /* relocation */
lputl(0); /* line numbers */
@ -547,10 +492,10 @@ asmb(void)
* data section header
*/
s8put(".data");
lputl(INITDAT); /* pa */
lputl(INITDAT); /* va */
lputl(segdata.vaddr); /* pa */
lputl(segdata.vaddr); /* va */
lputl(segdata.filelen); /* data size */
lputl(HEADR+textsize); /* file offset */
lputl(HEADR+segtext.filelen); /* file offset */
lputl(0); /* relocation */
lputl(0); /* line numbers */
lputl(0); /* relocation, line numbers */
@ -559,8 +504,8 @@ asmb(void)
* bss section header
*/
s8put(".bss");
lputl(INITDAT+segdata.filelen); /* pa */
lputl(INITDAT+segdata.filelen); /* va */
lputl(segdata.vaddr+segdata.filelen); /* pa */
lputl(segdata.vaddr+segdata.filelen); /* va */
lputl(segdata.len - segdata.filelen); /* bss size */
lputl(0); /* file offset */
lputl(0); /* relocation */
@ -574,16 +519,16 @@ asmb(void)
lputl(0); /* pa */
lputl(0); /* va */
lputl(symsize+lcsize); /* comment size */
lputl(HEADR+textsize+segdata.filelen); /* file offset */
lputl(HEADR+textsize+segdata.filelen); /* offset of syms */
lputl(HEADR+textsize+segdata.filelen+symsize);/* offset of line numbers */
lputl(HEADR+segtext.filelen+segdata.filelen); /* file offset */
lputl(HEADR+segtext.filelen+segdata.filelen); /* offset of syms */
lputl(HEADR+segtext.filelen+segdata.filelen+symsize);/* offset of line numbers */
lputl(0); /* relocation, line numbers */
lputl(0x200); /* flags comment only */
break;
case 2: /* plan9 */
magic = 4*11*11+7;
lput(magic); /* magic */
lput(textsize); /* sizes */
lput(segtext.filelen); /* sizes */
lput(segdata.filelen);
lput(segdata.len - segdata.filelen);
lput(symsize); /* nsyms */
@ -596,7 +541,7 @@ asmb(void)
break;
case 4:
/* fake MS-DOS .EXE */
v = rnd(HEADR+textsize, INITRND)+segdata.filelen;
v = rnd(HEADR+segtext.filelen, INITRND)+segdata.filelen;
wputl(0x5A4D); /* 'MZ' */
wputl(v % 512); /* bytes in last page */
wputl(rnd(v, 512)/512); /* total number of pages */
@ -630,7 +575,7 @@ asmb(void)
fo = HEADR;
startva = INITTEXT - HEADR;
va = startva + fo;
w = textsize;
w = segtext.filelen;
/* This null SHdr must appear before all others */
sh = newElfShdr(elfstr[ElfStrEmpty]);

3
src/cmd/8l/l.h
View File

@ -272,9 +272,9 @@ EXTERN union
EXTERN int32 HEADR;
EXTERN int32 HEADTYPE;
EXTERN int32 INITDAT;
EXTERN int32 INITRND;
EXTERN int32 INITTEXT;
EXTERN int32 INITDAT;
EXTERN char* INITENTRY; /* entry point */
EXTERN Biobuf bso;
EXTERN int32 casepc;
@ -322,6 +322,7 @@ extern char* anames[];
int Aconv(Fmt*);
int Dconv(Fmt*);
int Iconv(Fmt*);
int Pconv(Fmt*);
int Rconv(Fmt*);
int Sconv(Fmt*);

27
src/cmd/8l/list.c
View File

@ -42,6 +42,7 @@ listinit(void)
fmtinstall('D', Dconv);
fmtinstall('S', Sconv);
fmtinstall('P', Pconv);
fmtinstall('I', Iconv);
}
static Prog *bigP;
@ -317,6 +318,32 @@ Sconv(Fmt *fp)
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, "%.8ux", *p++);
s = fmtstrflush(&fmt);
fmtstrcpy(fp, s);
free(s);
return 0;
}
void
diag(char *fmt, ...)
{

3
src/cmd/8l/obj.c
View File

@ -320,7 +320,6 @@ main(int argc, char *argv[])
doelf();
if(HEADTYPE == 6)
domacho();
dodata();
dostkoff();
if(debug['p'])
if(debug['1'])
@ -328,6 +327,8 @@ main(int argc, char *argv[])
else
doprof2();
span();
dodata();
address();
reloc();
if(HEADTYPE == 10)
dope();

62
src/cmd/8l/span.c
View File

@ -134,19 +134,11 @@ span(void)
Prog *p, *q;
int32 v, c;
int n;
Sym *s;
Section *sect, *rosect;
Section *sect;
if(debug['v'])
Bprint(&bso, "%5.2f span\n", cputime());
segtext.rwx = 05;
segtext.vaddr = INITTEXT - HEADR;
xdefine("etext", STEXT, 0L);
xdefine("rodata", SRODATA, 0L);
xdefine("erodata", SRODATA, 0L);
// NOTE(rsc): If we get rid of the globals we should
// be able to parallelize these iterations.
for(cursym = textp; cursym != nil; cursym = cursym->next) {
@ -181,7 +173,7 @@ span(void)
// Could parallelize here too, by assigning to text
// and then letting threads copy down, but probably not worth it.
c = INITTEXT;
sect = segtext.sect;
sect = addsection(&segtext, ".text", 05);
sect->vaddr = c;
for(cursym = textp; cursym != nil; cursym = cursym->next) {
cursym->value = c;
@ -190,53 +182,6 @@ span(void)
c += cursym->size;
}
sect->len = c - sect->vaddr;
xdefine("etext", STEXT, c);
if(debug['v'])
Bprint(&bso, "etext = %llux\n", c);
xdefine("rodata", SRODATA, c);
if(INITRND)
c = rnd(c, INITRND);
rosect = segtext.sect->next;
rosect->vaddr = c;
c += rosect->len;
xdefine("erodata", SRODATA, c);
textsize = c - INITTEXT;
if(debug['v'])
Bprint(&bso, "erodata = %llux", c);
Bflush(&bso);
segtext.len = c - segtext.vaddr;
segtext.filelen = segtext.len;
if(INITRND)
c = rnd(c, INITRND);
INITDAT = c;
// Adjust everything now that we know INITDAT.
// This will get simpler when everything is relocatable
// and we can run span before dodata.
segdata.vaddr += INITDAT;
for(sect=segdata.sect; sect!=nil; sect=sect->next)
sect->vaddr += INITDAT;
xdefine("data", SBSS, INITDAT);
xdefine("edata", SBSS, INITDAT+segdata.filelen);
xdefine("end", SBSS, INITDAT+segdata.len);
for(s=datap; s!=nil; s=s->next) {
switch(s->type) {
case SELFDATA:
case SRODATA:
s->value += rosect->vaddr;
break;
case SDATA:
case SBSS:
s->value += INITDAT;
break;
}
}
}
void
@ -247,6 +192,7 @@ xdefine(char *p, int t, int32 v)
s = lookup(p, 0);
s->type = t;
s->value = v;
s->reachable = 1;
}
void
@ -561,7 +507,7 @@ symaddr(Sym *s)
return s->value;
case SMACHO:
return INITDAT + segdata.filelen - dynptrsize + s->value;
return segdata.vaddr + segdata.filelen - dynptrsize + s->value;
default:
if(!s->reachable)

6
src/cmd/8l/symtab.c
View File

@ -65,7 +65,7 @@ putsymb(char *s, int t, vlong v, vlong size, int ver, Sym *go)
if(go) {
if(!go->reachable)
sysfatal("unreachable type %s", go->name);
gv = go->value+INITDAT;
gv = symaddr(go);
}
lput(gv);
@ -114,13 +114,13 @@ genasmsym(void (*put)(char*, int, vlong, vlong, int, Sym*))
case SMACHO:
if(!s->reachable)
continue;
put(s->name, 'D', s->value+INITDAT+segdata.filelen-dynptrsize, s->size, s->version, s->gotype);
put(s->name, 'D', symaddr(s), s->size, s->version, s->gotype);
continue;
case SBSS:
if(!s->reachable)
continue;
put(s->name, 'B', s->value+INITDAT, s->size, s->version, s->gotype);
put(s->name, 'B', symaddr(s), s->size, s->version, s->gotype);
continue;
case SFIXED:

93
src/cmd/ld/data.c
View File

@ -166,7 +166,21 @@ relocsym(Sym *s)
o += r->add;
switch(siz) {
default:
diag("bad reloc size %d", siz);
diag("bad reloc size %#ux", siz);
case 4 + Rbig:
fl = o;
s->p[off] = fl>>24;
s->p[off+1] = fl>>16;
s->p[off+2] = fl>>8;
s->p[off+3] = fl;
break;
case 4 + Rlittle:
fl = o;
s->p[off] = fl;
s->p[off+1] = fl>>8;
s->p[off+2] = fl>>16;
s->p[off+3] = fl>>24;
break;
case 4:
fl = o;
cast = (uchar*)&fl;
@ -317,7 +331,7 @@ blk(Sym *allsym, int32 addr, int32 size)
if(sym->value >= eaddr)
break;
if(sym->value < addr) {
diag("phase error: addr=%#llx but sym=%#llx type=%d", addr, sym->value, sym->type);
diag("phase error: addr=%#llx but sym=%#llx type=%d", (vlong)addr, (vlong)sym->value, sym->type);
errorexit();
}
cursym = sym;
@ -345,7 +359,7 @@ void
codeblk(int32 addr, int32 size)
{
Sym *sym;
int32 eaddr, i, n, epc;
int32 eaddr, n, epc;
Prog *p;
uchar *q;
@ -379,7 +393,7 @@ codeblk(int32 addr, int32 size)
Bprint(&bso, "\n");
}
p = sym->text;
Bprint(&bso, "%-20s %.8llux| %P\n", sym->name, addr, p);
Bprint(&bso, "%.6llux\t%-20s | %P\n", addr, sym->name, p);
for(p = p->link; p != P; p = p->link) {
if(p->link != P)
epc = p->link->pc;
@ -388,11 +402,7 @@ codeblk(int32 addr, int32 size)
Bprint(&bso, "%.6ux\t", p->pc);
q = sym->p + p->pc - sym->value;
n = epc - p->pc;
for(i=0; i<n; i++)
Bprint(&bso, "%.2ux", *q++);
for(; i < 10; i++)
Bprint(&bso, " ");
Bprint(&bso, " | %P\n", p);
Bprint(&bso, "%-20.*I | %P\n", n, q, p);
addr += n;
}
}
@ -593,9 +603,6 @@ dodata(void)
Bprint(&bso, "%5.2f dodata\n", cputime());
Bflush(&bso);
segdata.rwx = 06;
segdata.vaddr = 0; /* span will += INITDAT */
last = nil;
datap = nil;
for(h=0; h<NHASH; h++) {
@ -627,8 +634,6 @@ dodata(void)
* so we can just walk it for each piece we want to emit.
*/
sect = addsection(&segtext, ".text", 05); // set up for span TODO(rsc): clumsy
/* read-only data */
sect = addsection(&segtext, ".rodata", 06);
sect->vaddr = 0;
@ -666,7 +671,7 @@ dodata(void)
datsize += t;
}
sect->len = datsize - sect->vaddr;
segdata.filelen = datsize;
datsize += dynptrsize;
/* bss */
sect = addsection(&segdata, ".bss", 06);
@ -690,15 +695,61 @@ dodata(void)
datsize += t;
}
sect->len = datsize - sect->vaddr;
segdata.len = datsize;
}
xdefine("data", SBSS, 0);
xdefine("edata", SBSS, segdata.filelen);
xdefine("end", SBSS, segdata.len);
// assign addresses
void
address(void)
{
Section *s, *text, *data, *rodata, *bss;
Sym *sym;
uvlong va;
if(debug['s'] || HEADTYPE == 8)
va = INITTEXT;
segtext.rwx = 05;
segtext.vaddr = va;
segtext.fileoff = HEADR;
for(s=segtext.sect; s != nil; s=s->next) {
s->vaddr = va;
va += s->len;
segtext.len = va - INITTEXT;
va = rnd(va, INITRND);
}
segtext.filelen = segtext.len;
segdata.rwx = 06;
segdata.vaddr = va;
segdata.fileoff = va - segtext.vaddr + segtext.fileoff;
for(s=segdata.sect; s != nil; s=s->next) {
s->vaddr = va;
va += s->len;
segdata.len = va - segdata.vaddr;
}
segdata.filelen = segdata.sect->len + dynptrsize; // assume .data is first
text = segtext.sect;
rodata = segtext.sect->next;
data = segdata.sect;
bss = segdata.sect->next;
for(sym = datap; sym != nil; sym = sym->next) {
cursym = sym;
if(sym->type < SDATA)
sym->value += rodata->vaddr;
else
sym->value += data->vaddr;
}
xdefine("text", STEXT, text->vaddr);
xdefine("etext", STEXT, text->vaddr + text->len);
xdefine("rodata", SRODATA, rodata->vaddr);
xdefine("erodata", SRODATA, rodata->vaddr + rodata->len);
xdefine("data", SBSS, data->vaddr);
xdefine("edata", SBSS, data->vaddr + data->len);
xdefine("end", SBSS, segdata.vaddr + segdata.len);
if(debug['s'])
xdefine("symdat", SFIXED, 0);
else
xdefine("symdat", SFIXED, SYMDATVA);
}

8
src/cmd/ld/lib.h
View File

@ -146,12 +146,20 @@ vlong addsize(Sym*, Sym*);
vlong adduint8(Sym*, uint8);
vlong adduint16(Sym*, uint16);
void strnput(char*, int);
void dodata(void);
void address(void);
int pathchar(void);
void* mal(uint32);
void unmal(void*, uint32);
void mywhatsys(void);
// relocation size bits
enum {
Rbig = 128,
Rlittle = 64,
};
/* set by call to mywhatsys() */
extern char* goroot;
extern char* goarch;

8
src/cmd/ld/macho.c
View File

@ -411,7 +411,7 @@ domacholink(void)
linkoff = 0;
if(nlinkdata > 0 || nstrtab > 0) {
linkoff = rnd(HEADR+textsize, INITRND) + rnd(segdata.filelen - dynptrsize, INITRND);
linkoff = rnd(HEADR+segtext.len, INITRND) + rnd(segdata.filelen - dynptrsize, INITRND);
seek(cout, linkoff, 0);
for(i = 0; i<nexpsym; ++i) {
@ -420,7 +420,7 @@ domacholink(void)
if(s->type == SXREF)
diag("export of undefined symbol %s", s->name);
if (s->type != STEXT)
val += INITDAT;
val += segdata.vaddr;
p = linkdata+expsym[i].off;
p[0] = val;
p[1] = val >> 8;
@ -477,7 +477,7 @@ asmbmacho(vlong symdatva, vlong symo)
ms->vsize = va;
/* text */
v = rnd(HEADR+textsize, INITRND);
v = rnd(HEADR+segtext.len, INITRND);
ms = newMachoSeg("__TEXT", 1);
ms->vaddr = va;
ms->vsize = v;
@ -487,7 +487,7 @@ asmbmacho(vlong symdatva, vlong symo)
msect = newMachoSect(ms, "__text");
msect->addr = INITTEXT;
msect->size = textsize;
msect->size = segtext.sect->len;
msect->off = INITTEXT - va;
msect->flag = 0x400; /* flag - some instructions */