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new elf header

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SVN=121737
This commit is contained in:
Ken Thompson 2008-06-09 13:16:50 -07:00
parent 3086910f17
commit 6a659ebf13
5 changed files with 210 additions and 40 deletions
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4
src/cmd/6g/cgen.c
View File

@ -175,6 +175,10 @@ cgen(Node *n, Node *res)
case OMOD:
case ODIV:
if(isfloat[n->type->etype]) {
a = optoas(n->op, nl->type);
goto abop;
}
cgen_div(n->op, nl, nr, res);
break;

230
src/cmd/6l/asm.c
View File

@ -173,10 +173,6 @@ asmb(void)
case 5:
seek(cout, HEADR+textsize, 0);
break;
case 7:
v = rnd(HEADR+textsize, INITRND);
seek(cout, v, 0);
break;
case 6:
v = HEADR+textsize;
myseek(cout, v);
@ -187,6 +183,10 @@ asmb(void)
}
cflush();
break;
case 7:
v = rnd(HEADR+textsize, INITRND);
seek(cout, v, 0);
break;
}
if(debug['v'])
@ -218,9 +218,13 @@ asmb(void)
default:
case 2:
case 5:
debug['s'] = 1;
seek(cout, HEADR+textsize+datsize, 0);
break;
case 7:
debug['s'] = 1;
seek(cout, HEADR+textsize+datsize, 0);
linuxstrtable();
break;
case 6:
debug['s'] = 1;
@ -239,12 +243,13 @@ debug['s'] = 1;
if(dlm)
asmdyn();
cflush();
}
else if(dlm){
} else
if(dlm){
seek(cout, HEADR+textsize+datsize, 0);
asmdyn();
cflush();
}
if(debug['v'])
Bprint(&bso, "%5.2f headr\n", cputime());
Bflush(&bso);
@ -383,47 +388,122 @@ debug['s'] = 1;
cput(1); /* version = CURRENT */
strnput("", 9);
/*10*/ wputl(2); /* type = EXEC */
wputl(2); /* type = EXEC */
wputl(62); /* machine = AMD64 */
lputl(1L); /* version = CURRENT */
/*18*/ llputl(entryvalue()); /* entry vaddr */
llputl(entryvalue()); /* entry vaddr */
llputl(64L); /* offset to first phdr */
llputl(0L); /* offset to first shdr */
/*30*/ lputl(0L); /* processor specific flags */
llputl(64L+56*3); /* offset to first shdr */
lputl(0L); /* processor specific flags */
wputl(64); /* Ehdr size */
wputl(56); /* Phdr size */
wputl(2); /* # of Phdrs */
wputl(3); /* # of Phdrs */
wputl(64); /* Shdr size */
wputl(0); /* # of Shdrs */
wputl(0); /* Shdr string size */
wputl(5); /* # of Shdrs */
wputl(4); /* Shdr with strings */
lputl(1L); /* text - type = PT_LOAD */
lputl(1L+4L); /* text - flags = PF_X+PF_R */
llputl(HEADR); /* file offset */
llputl(INITTEXT); /* vaddr */
llputl(INITTEXT); /* paddr */
llputl(textsize); /* file size */
llputl(textsize); /* memory size */
llputl(INITRND); /* alignment */
linuxphdr(1, /* text - type = PT_LOAD */
1L+4L, /* text - flags = PF_X+PF_R */
HEADR, /* file offset */
INITTEXT, /* vaddr */
INITTEXT, /* paddr */
textsize, /* file size */
textsize, /* memory size */
INITRND); /* alignment */
lputl(1L); /* data - type = PT_LOAD */
lputl(1L+2L+4L); /* text - flags = PF_X+PF_W+PF_R */
v = rnd(HEADR+textsize, INITRND);
llputl(v); /* file offset */
llputl(INITDAT); /* vaddr */
llputl(INITDAT); /* paddr */
llputl(datsize); /* file size */
llputl(datsize+bsssize); /* memory size */
llputl(INITRND); /* alignment */
linuxphdr(1, /* data - type = PT_LOAD */
1L+2L+4L, /* data - flags = PF_X+PF_W+PF_R */
v, /* file offset */
INITDAT, /* vaddr */
INITDAT, /* paddr */
datsize, /* file size */
datsize+bsssize, /* memory size */
INITRND); /* alignment */
// lputl(0L); /* data - type = PT_NULL */
// lputl(4L); /* ro - flags = PF_R */
// llputl(HEADR+textsize+datsize); /* file offset */
// llputl(0L);
// llputl(0L);
// llputl(symsize); /* symbol table size */
// llputl(lcsize); /* line number size */
// llputl(0x04L); /* alignment */
linuxphdr(0x6474e551, /* gok - type = gok */
1L+2L+4L, /* gok - flags = PF_X+PF_R */
0, /* file offset */
0, /* vaddr */
0, /* paddr */
0, /* file size */
0, /* memory size */
8); /* alignment */
linuxshdr(nil, /* name */
0, /* type */
0, /* flags */
0, /* addr */
0, /* off */
0, /* size */
0, /* link */
0, /* info */
0, /* align */
0); /* entsize */
stroffset = 1;
v = HEADR;
linuxshdr(".text", /* name */
1, /* type */
6, /* flags */
INITTEXT, /* addr */
v, /* off */
textsize, /* size */
0, /* link */
0, /* info */
4, /* align */
0); /* entsize */
v += textsize;
linuxshdr(".data", /* name */
1, /* type */
3, /* flags */
INITDAT, /* addr */
v, /* off */
datsize, /* size */
0, /* link */
0, /* info */
4, /* align */
0); /* entsize */
v += datsize;
linuxshdr(".bss", /* name */
8, /* type */
3, /* flags */
INITDAT, /* addr */
v, /* off */
bsssize, /* size */
0, /* link */
0, /* info */
4, /* align */
0); /* entsize */
v += 0;
va = stroffset +
strlen(".shstrtab")+1 +
strlen(".gosymtab")+1;
linuxshdr(".shstrtab", /* name */
3, /* type */
0, /* flags */
0, /* addr */
v, /* off */
va, /* size */
0, /* link */
0, /* info */
4, /* align */
0); /* entsize */
v += va;
linuxshdr(".gosymtab", /* name */
2, /* type */
0, /* flags */
0, /* addr */
v, /* off */
0, /* size */
0, /* link */
0, /* info */
4, /* align */
0); /* entsize */
break;
}
cflush();
@ -678,3 +758,79 @@ machheadr(void)
return a*4;
}
ulong
linuxheadr(void)
{
ulong a;
a = 64; /* a.out header */
a += 56; /* page zero seg */
a += 56; /* text seg */
a += 56; /* stack seg */
a += 64; /* nil sect */
a += 64; /* .text sect */
a += 64; /* .data seg */
a += 64; /* .bss sect */
a += 64; /* .shstrtab sect - strings for headers */
a += 64; /* .gosymtab sect */
return a;
}
void
linuxphdr(int type, int flags, vlong foff,
vlong vaddr, vlong paddr,
vlong filesize, vlong memsize, vlong align)
{
lputl(type); /* text - type = PT_LOAD */
lputl(flags); /* text - flags = PF_X+PF_R */
llputl(foff); /* file offset */
llputl(vaddr); /* vaddr */
llputl(paddr); /* paddr */
llputl(filesize); /* file size */
llputl(memsize); /* memory size */
llputl(align); /* alignment */
}
void
linuxshdr(char *name, ulong type, vlong flags, vlong addr, vlong off,
vlong size, ulong link, ulong info, vlong align, vlong entsize)
{
lputl(stroffset);
lputl(type);
llputl(flags);
llputl(addr);
llputl(off);
llputl(size);
lputl(link);
lputl(info);
llputl(align);
llputl(entsize);
if(name != nil)
stroffset += strlen(name)+1;
}
void
linuxstrtable(void)
{
char *name;
name = "";
strnput(name, strlen(name)+1);
name = ".text";
strnput(name, strlen(name)+1);
name = ".data";
strnput(name, strlen(name)+1);
name = ".bss";
strnput(name, strlen(name)+1);
name = ".shstrtab";
strnput(name, strlen(name)+1);
name = ".gosymtab";
strnput(name, strlen(name)+1);
}

10
src/cmd/6l/l.h
View File

@ -344,6 +344,7 @@ EXTERN int imports, nimports;
EXTERN int exports, nexports;
EXTERN char* EXPTAB;
EXTERN Prog undefp;
EXTERN ulong stroffset;
#define UP (&undefp)
@ -424,6 +425,15 @@ void machsect(char*, char*, vlong, vlong, ulong, ulong, ulong, ulong, ulong);
void machstack(vlong);
ulong machheadr(void);
ulong linuxheadr(void);
void linuxphdr(int type, int flags, vlong foff,
vlong vaddr, vlong paddr,
vlong filesize, vlong memsize, vlong align);
void linuxshdr(char *name, ulong type, vlong flags, vlong addr, vlong off,
vlong size, ulong link, ulong info, vlong align, vlong entsize);
void linuxstrtable(void);
#pragma varargck type "D" Adr*
#pragma varargck type "P" Prog*
#pragma varargck type "R" int

4
src/cmd/6l/obj.c
View File

@ -195,9 +195,9 @@ main(int argc, char *argv[])
INITRND = 4096;
break;
case 7: /* elf64 executable */
HEADR = rnd(64L+2*56L, 16);
HEADR = linuxheadr();
if(INITTEXT == -1)
INITTEXT = 0x400000L+HEADR;
INITTEXT = 4096+HEADR;
if(INITDAT == -1)
INITDAT = 0;
if(INITRND == -1)

2
src/cmd/gc/lex.c
View File

@ -227,7 +227,7 @@ l0:
for(;;) {
if(escchar('"', &escflag, &v))
break;
if(escflag || v < Runeself) {
if(v < Runeself || escflag) {
cp = remal(cp, c1, 1);
cp[c1++] = v;
} else {