ref: c76cc12a1799ce214b07882eb6f4ab0906c0151b
dir: /sys/src/cmd/9l/asm.c/
#include "l.h"
#define PADDR(a) ((ulong)(a) & ~0xF0000000UL)
#define LPUT(c)\
{\
cbp[0] = (c)>>24;\
cbp[1] = (c)>>16;\
cbp[2] = (c)>>8;\
cbp[3] = (c);\
cbp += 4;\
cbc -= 4;\
if(cbc <= 0)\
cflush();\
}
#define CPUT(c)\
{\
cbp[0] = (c);\
cbp++;\
cbc--;\
if(cbc <= 0)\
cflush();\
}
void strnput(char*, int);
vlong
entryvalue(void)
{
char *a;
Sym *s;
a = INITENTRY;
if(*a >= '0' && *a <= '9')
return atolwhex(a);
s = lookup(a, 0);
if(s->type == 0)
return INITTEXT;
if(dlm && s->type == SDATA)
return s->value+INITDAT;
if(s->type != STEXT && s->type != SLEAF)
diag("entry not text: %s", s->name);
return s->value;
}
void
asmb(void)
{
Prog *p;
long t, magic;
Optab *o;
vlong vl;
if(debug['v'])
Bprint(&bso, "%5.2f asm\n", cputime());
Bflush(&bso);
seek(cout, HEADR, 0);
pc = INITTEXT;
//fprint(2, "pc=%llux INITTEXT=%llux\n",pc, INITTEXT);
for(p = firstp; p != P; p = p->link) {
if(p->as == ATEXT) {
curtext = p;
autosize = p->to.offset + 8;
if(p->from3.type == D_CONST) {
for(; pc < p->pc; pc++)
CPUT(0);
}
}
if(p->pc != pc) {
diag("phase error %llux sb %llux",
p->pc, pc);
if(!debug['a'])
prasm(curp);
pc = p->pc;
}
curp = p;
o = oplook(p); /* could probably avoid this call */
if(asmout(p, o, 0)) {
p = p->link;
pc += 4;
}
pc += o->size;
}
if(debug['a'])
Bprint(&bso, "\n");
Bflush(&bso);
cflush();
curtext = P;
switch(HEADTYPE) {
case 0:
case 1:
case 2:
case 5:
case 6:
seek(cout, HEADR+textsize, 0);
break;
case 3:
seek(cout, rnd(HEADR+textsize, 4), 0);
break;
}
if(dlm){
char buf[8];
write(cout, buf, INITDAT-textsize);
textsize = INITDAT;
}
for(t = 0; t < datsize; t += sizeof(buf)-100) {
if(datsize-t > sizeof(buf)-100)
datblk(t, sizeof(buf)-100);
else
datblk(t, datsize-t);
}
symsize = 0;
lcsize = 0;
if(!debug['s']) {
if(debug['v'])
Bprint(&bso, "%5.2f sym\n", cputime());
Bflush(&bso);
switch(HEADTYPE) {
case 0:
case 1:
case 2:
case 5:
case 6:
seek(cout, HEADR+textsize+datsize, 0);
break;
case 3:
seek(cout, rnd(HEADR+textsize, 4)+datsize, 0);
break;
}
if(!debug['s'])
asmsym();
if(debug['v'])
Bprint(&bso, "%5.2f sp\n", cputime());
Bflush(&bso);
if(!debug['s'])
asmlc();
if(dlm)
asmdyn();
if(HEADTYPE == 0 || HEADTYPE == 1) /* round up file length for boot image */
if((symsize+lcsize) & 1)
CPUT(0);
cflush();
}
else if(dlm){
asmdyn();
cflush();
}
seek(cout, 0L, 0);
switch(HEADTYPE) {
case 0:
lput(0x1030107); /* magic and sections */
lput(textsize); /* sizes */
lput(datsize);
lput(bsssize);
lput(symsize); /* nsyms */
lput(entryvalue()); /* va of entry */
lput(0L);
lput(lcsize);
break;
case 1:
if(dlm)
lput(0x80000000 | (4*21*21+7)); /* q.out magic */
else
lput(4*21*21+7); /* q.out magic */
lput(textsize); /* sizes */
lput(datsize);
lput(bsssize);
lput(symsize); /* nsyms */
lput(entryvalue()); /* va of entry */
lput(0L);
lput(lcsize);
break;
case 2: /* plan9 */
magic = 4*27*27+7;
magic |= 0x00008000; /* fat header */
if(dlm)
magic |= 0x80000000; /* dlm */
lput(magic);
lput(textsize); /* sizes */
lput(datsize);
lput(bsssize);
lput(symsize); /* nsyms */
vl = entryvalue();
lput(PADDR(vl)); /* va of entry (real mode on boot) */
lput(0L);
lput(lcsize);
llput(vl); /* va of entry */
break;
case 3:
break;
case 5:
case 6:
strnput("\177ELF", 4); /* e_ident */
CPUT(2); /* class = 64 bit */
CPUT(2); /* data = MSB */
CPUT(1); /* version = CURRENT */
strnput("", 9);
lput((2L<<16)|21L); /* type = EXEC; machine = PowerPC64 */
lput(1L); /* version = CURRENT */
llput(entryvalue()); /* entry vaddr */
llput(0x40L); /* offset to first phdr */
if(debug['S']){
llput(HEADR+textsize+datsize+symsize); /* offset to first shdr */
lput(0L); /* flags = PPC */
lput((0x40L<<16)|0x38L); /* Ehdr & Phdr sizes*/
lput((3L<<16)|0x40L); /* # Phdrs & Shdr size */
lput((3L<<16)|2L); /* # Shdrs & shdr string size */
} else {
llput(0L); /* offset to first shdr */
lput(0L); /* flags = PPC */
lput((0x40L<<16)|0x38L); /* Ehdr & Phdr sizes*/
if(HEADTYPE == 5)
lput((3L<<16)|0L); /* # Phdrs & Shdr size */
else
lput((2L<<16)|0L); /* # Phdrs & Shdr size */
lput((0L<<16)|0L); /* # Shdrs & shdr string size */
}
if(HEADTYPE == 5){
lput(1L); /* text - type = PT_LOAD */
lput(0x05L); /* protections = RX */
llput(HEADR); /* file offset */
llput(INITTEXT); /* vaddr */
llput(INITTEXT); /* paddr */
llput(textsize); /* file size */
llput(textsize); /* memory size */
llput(0x10000L); /* alignment */
lput(1L); /* data - type = PT_LOAD */
lput(0x07L); /* protections = RWX */
llput(HEADR+textsize); /* file offset */
llput(INITDAT); /* vaddr */
llput(INITDAT); /* paddr */
llput(datsize); /* file size */
llput(datsize); /* memory size */
llput(0x10000L); /* alignment */
} else {
lput(1L); /* text + data - type = PT_LOAD */
lput(0x07L); /* protections = RWX */
llput(HEADR); /* file offset */
/*
* linux kexec shits the bed with high physical segments.
* These are not actually used, so we just grumble and comply.
* /
llput(INITTEXT&0xFFFFFFFF); /* vaddr */
llput(INITTEXT&0xFFFFFFFF); /* paddr */
llput(textsize+datsize); /* file size */
llput(textsize+datsize); /* memory size */
llput(0x100000L); /* alignment */
}
lput(0L); /* data - type = PT_NULL */
lput(0x04L); /* protections = R */
llput(HEADR+textsize+datsize); /* file offset */
llput(0L);
llput(0L);
llput(symsize); /* symbol table size */
llput(lcsize); /* line number size */
llput(0x04L); /* alignment code?? */
cflush();
if(!debug['S'])
break;
seek(cout, HEADR+textsize+datsize+symsize, 0);
lput(1); /* Section name (string tbl index) */
lput(1); /* Section type */
llput(2|4); /* Section flags */
llput(INITTEXT); /* Section virtual addr at execution */
llput(HEADR); /* Section file offset */
llput(textsize); /* Section size in bytes */
lput(0); /* Link to another section */
lput(0); /* Additional section information */
llput(0x10000L); /* Section alignment */
llput(0); /* Entry size if section holds table */
lput(7); /* Section name (string tbl index) */
lput(1); /* Section type */
llput(2|1); /* Section flags */
llput(INITDAT); /* Section virtual addr at execution */
llput(HEADR+textsize); /* Section file offset */
llput(datsize); /* Section size in bytes */
lput(0); /* Link to another section */
lput(0); /* Additional section information */
llput(0x10000L); /* Section alignment */
llput(0); /* Entry size if section holds table */
/* string section header */
lput(12); /* Section name (string tbl index) */
lput(3); /* Section type */
llput(1 << 5); /* Section flags */
llput(0); /* Section virtual addr at execution */
llput(HEADR+textsize+datsize+symsize+3*40); /* Section file offset */
llput(14); /* Section size in bytes */
lput(0); /* Link to another section */
lput(0); /* Additional section information */
llput(1); /* Section alignment */
llput(0); /* Entry size if section holds table */
/* string table */
cput(0);
strnput(".text", 5);
cput(0);
strnput(".data", 5);
cput(0);
strnput(".strtab", 7);
cput(0);
cput(0);
break;
}
cflush();
}
void
strnput(char *s, int n)
{
for(; *s; s++){
CPUT(*s);
n--;
}
for(; n > 0; n--)
CPUT(0);
}
void
cput(long l)
{
CPUT(l);
}
void
wput(long l)
{
cbp[0] = l>>8;
cbp[1] = l;
cbp += 2;
cbc -= 2;
if(cbc <= 0)
cflush();
}
void
llput(vlong v)
{
lput(v>>32);
lput(v);
}
void
lput(long l)
{
LPUT(l);
}
void
cflush(void)
{
int n;
n = sizeof(buf.cbuf) - cbc;
if(n)
write(cout, buf.cbuf, n);
cbp = buf.cbuf;
cbc = sizeof(buf.cbuf);
}
void
asmsym(void)
{
Prog *p;
Auto *a;
Sym *s;
int h;
s = lookup("etext", 0);
if(s->type == STEXT)
putsymb(s->name, 'T', s->value, s->version);
for(h=0; h<NHASH; h++)
for(s=hash[h]; s!=S; s=s->link)
switch(s->type) {
case SCONST:
putsymb(s->name, 'D', s->value, s->version);
continue;
case SDATA:
putsymb(s->name, 'D', s->value+INITDAT, s->version);
continue;
case SBSS:
putsymb(s->name, 'B', s->value+INITDAT, s->version);
continue;
case SFILE:
putsymb(s->name, 'f', s->value, s->version);
continue;
}
for(p=textp; p!=P; p=p->cond) {
s = p->from.sym;
if(s->type != STEXT && s->type != SLEAF)
continue;
/* filenames first */
for(a=p->to.autom; a; a=a->link)
if(a->type == D_FILE)
putsymb(a->sym->name, 'z', a->aoffset, 0);
else
if(a->type == D_FILE1)
putsymb(a->sym->name, 'Z', a->aoffset, 0);
if(s->type == STEXT)
putsymb(s->name, 'T', s->value, s->version);
else
putsymb(s->name, 'L', s->value, s->version);
/* frame, auto and param after */
putsymb(".frame", 'm', p->to.offset+8, 0);
for(a=p->to.autom; a; a=a->link)
if(a->type == D_AUTO)
putsymb(a->sym->name, 'a', -a->aoffset, 0);
else
if(a->type == D_PARAM)
putsymb(a->sym->name, 'p', a->aoffset, 0);
}
if(debug['v'] || debug['n'])
Bprint(&bso, "symsize = %lud\n", symsize);
Bflush(&bso);
}
void
putsymb(char *s, int t, vlong v, int ver)
{
int i, f;
long l;
if(t == 'f')
s++;
if(HEADTYPE == 2){
l = v>>32;
LPUT(l);
}
l = v;
LPUT(l);
if(ver)
t += 'a' - 'A';
CPUT(t+0x80); /* 0x80 is variable length */
if(t == 'Z' || t == 'z') {
CPUT(s[0]);
for(i=1; s[i] != 0 || s[i+1] != 0; i += 2) {
CPUT(s[i]);
CPUT(s[i+1]);
}
CPUT(0);
CPUT(0);
i++;
}
else {
for(i=0; s[i]; i++)
CPUT(s[i]);
CPUT(0);
}
symsize += 4 + 1 + i + 1;
if(HEADTYPE == 2)
symsize += 4;
if(debug['n']) {
if(t == 'z' || t == 'Z') {
Bprint(&bso, "%c %.8llux ", t, v);
for(i=1; s[i] != 0 || s[i+1] != 0; i+=2) {
f = ((s[i]&0xff) << 8) | (s[i+1]&0xff);
Bprint(&bso, "/%x", f);
}
Bprint(&bso, "\n");
return;
}
if(ver)
Bprint(&bso, "%c %.8llux %s<%d>\n", t, v, s, ver);
else
Bprint(&bso, "%c %.8llux %s\n", t, v, s);
}
}
#define MINLC 4
void
asmlc(void)
{
vlong oldpc, oldlc;
Prog *p;
long v, s;
oldpc = INITTEXT;
oldlc = 0;
for(p = firstp; p != P; p = p->link) {
if(p->line == oldlc || p->as == ATEXT || p->as == ANOP) {
if(p->as == ATEXT)
curtext = p;
if(debug['L'])
Bprint(&bso, "%6llux %P\n",
p->pc, p);
continue;
}
if(debug['L'])
Bprint(&bso, "\t\t%6ld", lcsize);
v = (p->pc - oldpc) / MINLC;
while(v) {
s = 127;
if(v < 127)
s = v;
CPUT(s+128); /* 129-255 +pc */
if(debug['L'])
Bprint(&bso, " pc+%ld*%d(%ld)", s, MINLC, s+128);
v -= s;
lcsize++;
}
s = p->line - oldlc;
oldlc = p->line;
oldpc = p->pc + MINLC;
if(s > 64 || s < -64) {
CPUT(0); /* 0 vv +lc */
CPUT(s>>24);
CPUT(s>>16);
CPUT(s>>8);
CPUT(s);
if(debug['L']) {
if(s > 0)
Bprint(&bso, " lc+%ld(%d,%ld)\n",
s, 0, s);
else
Bprint(&bso, " lc%ld(%d,%ld)\n",
s, 0, s);
Bprint(&bso, "%6llux %P\n",
p->pc, p);
}
lcsize += 5;
continue;
}
if(s > 0) {
CPUT(0+s); /* 1-64 +lc */
if(debug['L']) {
Bprint(&bso, " lc+%ld(%ld)\n", s, 0+s);
Bprint(&bso, "%6llux %P\n",
p->pc, p);
}
} else {
CPUT(64-s); /* 65-128 -lc */
if(debug['L']) {
Bprint(&bso, " lc%ld(%ld)\n", s, 64-s);
Bprint(&bso, "%6llux %P\n",
p->pc, p);
}
}
lcsize++;
}
while(lcsize & 1) {
s = 129;
CPUT(s);
lcsize++;
}
if(debug['v'] || debug['L'])
Bprint(&bso, "lcsize = %ld\n", lcsize);
Bflush(&bso);
}
void
datblk(long s, long n)
{
Prog *p;
uchar *cast;
long l, fl, j;
vlong d;
int i, c;
memset(buf.dbuf, 0, n+100);
for(p = datap; p != P; p = p->link) {
curp = p;
l = p->from.sym->value + p->from.offset - s;
c = p->reg;
i = 0;
if(l < 0) {
if(l+c <= 0)
continue;
while(l < 0) {
l++;
i++;
}
}
if(l >= n)
continue;
if(p->as != AINIT && p->as != ADYNT) {
for(j=l+(c-i)-1; j>=l; j--)
if(buf.dbuf[j]) {
print("%P\n", p);
diag("multiple initialization");
break;
}
}
switch(p->to.type) {
default:
diag("unknown mode in initialization\n%P", p);
break;
case D_FCONST:
switch(c) {
default:
case 4:
fl = ieeedtof(&p->to.ieee);
cast = (uchar*)&fl;
for(; i<c; i++) {
buf.dbuf[l] = cast[fnuxi8[i+4]];
l++;
}
break;
case 8:
cast = (uchar*)&p->to.ieee;
for(; i<c; i++) {
buf.dbuf[l] = cast[fnuxi8[i]];
l++;
}
break;
}
break;
case D_SCONST:
for(; i<c; i++) {
buf.dbuf[l] = p->to.sval[i];
l++;
}
break;
case D_CONST:
d = p->to.offset;
if(p->to.sym) {
if(p->to.sym->type == SUNDEF){ /* TO DO: simplify */
ckoff(p->to.sym, d);
d += p->to.sym->value;
}
if(p->to.sym->type == STEXT ||
p->to.sym->type == SLEAF)
d += p->to.sym->value;
if(p->to.sym->type == SDATA)
d += p->to.sym->value + INITDAT;
if(p->to.sym->type == SBSS)
d += p->to.sym->value + INITDAT;
if(dlm)
dynreloc(p->to.sym, l+s+INITDAT, 1, 0, 0);
}
fl = d;
cast = (uchar*)&fl;
switch(c) {
default:
diag("bad nuxi %d %d\n%P", c, i, curp);
break;
case 1:
for(; i<c; i++) {
buf.dbuf[l] = cast[inuxi1[i]];
l++;
}
break;
case 2:
for(; i<c; i++) {
buf.dbuf[l] = cast[inuxi2[i]];
l++;
}
break;
case 4:
for(; i<c; i++) {
buf.dbuf[l] = cast[inuxi4[i]];
l++;
}
break;
case 8:
cast = (uchar*)&d;
for(; i<c; i++) {
buf.dbuf[l] = cast[inuxi8[i]];
l++;
}
break;
}
break;
}
}
write(cout, buf.dbuf, n);
}