ref: c96efcfef35fc8be3e510d134cf65e9a8204f7d0
dir: /sys/src/cmd/ql/asm.c/
#include "l.h"
#define KMASK 0xF0000000
#define JMPSZ sizeof(u32int) /* size of bootstrap jump section */
#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);
long
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;
Optab *o;
long prevpc;
if(debug['v'])
Bprint(&bso, "%5.2f asm\n", cputime());
Bflush(&bso);
/* emit text segment */
seek(cout, HEADR, 0);
prevpc = pc = INITTEXT;
for(p = firstp; p != P; p = p->link) {
if(p->as == ATEXT) {
curtext = p;
autosize = p->to.offset + 4;
if(p->from3.type == D_CONST) {
for(; pc < p->pc; pc++)
CPUT(0);
}
}
if(p->pc != pc) {
diag("phase error %lux sb %lux",
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 (prevpc & (1<<31) && (pc & (1<<31)) == 0) {
char *tn;
tn = "??none??";
if(curtext != P && curtext->from.sym != S)
tn = curtext->from.sym->name;
Bprint(&bso, "%s: warning: text segment wrapped past 0\n", tn);
}
prevpc = pc;
}
/* for virtex 4, inject a jmp instruction after other text */
if(HEADTYPE == 6)
/* branch to absolute entry address (0xfffe2100) */
lput((18 << 26) | (0x03FFFFFC & entryvalue()) | 2);
if(debug['a'])
Bprint(&bso, "\n");
Bflush(&bso);
cflush();
/* emit data segment */
curtext = P;
switch(HEADTYPE) {
case 6:
textsize += JMPSZ;
/* fall through */
case 0:
case 1:
case 2:
case 5:
seek(cout, HEADR+textsize, 0);
break;
case 3:
seek(cout, rnd(HEADR+textsize, 4), 0);
break;
case 4:
seek(cout, rnd(HEADR+textsize, 4096), 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;
case 4:
seek(cout, rnd(HEADR+textsize, 4096)+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();
}
/* back up and write the header */
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:
lput(0x4a6f7921); /* Joy! */
lput(0x70656666); /* peff */
lput(0x70777063); /* pwpc */
lput(1);
lput(0);
lput(0);
lput(0);
lput(0);
lput(0x30002); /*YY*/
lput(0);
lput(~0);
lput(0);
lput(textsize+datsize);
lput(textsize+datsize);
lput(textsize+datsize);
lput(0xd0); /* header size */
lput(0x10400);
lput(~0);
lput(0);
lput(0xc);
lput(0xc);
lput(0xc);
lput(0xc0);
lput(0x01010400);
lput(~0);
lput(0);
lput(0x38);
lput(0x38);
lput(0x38);
lput(0x80);
lput(0x04040400);
lput(0);
lput(1);
lput(0);
lput(~0);
lput(0);
lput(~0);
lput(0);
lput(0);
lput(0);
lput(0);
lput(0);
lput(0);
lput(0);
lput(0);
lput(0);
lput(0);
lput(0);
lput(0x3100); /* load address */
lput(0);
lput(0);
lput(0); /* whew! */
break;
case 2:
if(dlm)
lput(0x80000000 | (4*21*21+7)); /* magic */
else
lput(4*21*21+7); /* magic */
lput(textsize); /* sizes */
lput(datsize);
lput(bsssize);
lput(symsize); /* nsyms */
lput(entryvalue()); /* va of entry */
lput(0L);
lput(lcsize);
break;
case 3:
break;
case 4:
lput((0x1DFL<<16)|3L); /* magic and sections */
lput(time(0)); /* time and date */
lput(rnd(HEADR+textsize, 4096)+datsize);
lput(symsize); /* nsyms */
lput((0x48L<<16)|15L); /* size of optional hdr and flags */
lput((0413<<16)|01L); /* magic and version */
lput(textsize); /* sizes */
lput(datsize);
lput(bsssize);
lput(entryvalue()); /* va of entry */
lput(INITTEXT); /* va of base of text */
lput(INITDAT); /* va of base of data */
lput(INITDAT); /* address of TOC */
lput((1L<<16)|1); /* sn(entry) | sn(text) */
lput((2L<<16)|1); /* sn(data) | sn(toc) */
lput((0L<<16)|3); /* sn(loader) | sn(bss) */
lput((3L<<16)|3); /* maxalign(text) | maxalign(data) */
lput(('1'<<24)|('L'<<16)|0); /* type field, and reserved */
lput(0); /* max stack allowed */
lput(0); /* max data allowed */
lput(0); lput(0); lput(0); /* reserved */
strnput(".text", 8); /* text segment */
lput(INITTEXT); /* address */
lput(INITTEXT);
lput(textsize);
lput(HEADR);
lput(0L);
lput(HEADR+textsize+datsize+symsize);
lput(lcsize); /* line number size */
lput(0x20L); /* flags */
strnput(".data", 8); /* data segment */
lput(INITDAT); /* address */
lput(INITDAT);
lput(datsize);
lput(rnd(HEADR+textsize, 4096));/* sizes */
lput(0L);
lput(0L);
lput(0L);
lput(0x40L); /* flags */
strnput(".bss", 8); /* bss segment */
lput(INITDAT+datsize); /* address */
lput(INITDAT+datsize);
lput(bsssize);
lput(0L);
lput(0L);
lput(0L);
lput(0L);
lput(0x80L); /* flags */
break;
case 5:
/*
* customised for blue/gene,
* notably the alignment and KMASK masking.
*/
strnput("\177ELF", 4); /* e_ident */
CPUT(1); /* class = 32 bit */
CPUT(2); /* data = MSB */
CPUT(1); /* version = CURRENT */
strnput("", 9);
lput((2L<<16)|20L); /* type = EXEC; machine = PowerPC */
lput(1L); /* version = CURRENT */
lput(entryvalue() & ~KMASK); /* entry vaddr */
lput(52L); /* offset to first phdr */
if(debug['S']){
lput(HEADR+textsize+datsize+symsize); /* offset to first shdr */
lput(0L); /* flags = PPC */
lput((52L<<16)|32L); /* Ehdr & Phdr sizes*/
lput((3L<<16)|40L); /* # Phdrs & Shdr size */
lput((3L<<16)|2L); /* # Shdrs & shdr string size */
}
else{
lput(0L);
lput(0L); /* flags = PPC */
lput((52L<<16)|32L); /* Ehdr & Phdr sizes*/
lput((3L<<16)|0L); /* # Phdrs & Shdr size */
lput((3L<<16)|0L); /* # Shdrs & shdr string size */
}
lput(1L); /* text - type = PT_LOAD */
lput(HEADR); /* file offset */
lput(INITTEXT & ~KMASK); /* vaddr */
lput(INITTEXT); /* paddr */
lput(textsize); /* file size */
lput(textsize); /* memory size */
lput(0x05L); /* protections = RX */
lput(0x10000L); /* alignment */
lput(1L); /* data - type = PT_LOAD */
lput(HEADR+textsize); /* file offset */
lput(INITDAT & ~KMASK); /* vaddr */
lput(INITDAT); /* paddr */
lput(datsize); /* file size */
lput(datsize); /* memory size */
lput(0x07L); /* protections = RWX */
lput(0x10000L); /* alignment */
lput(0L); /* data - type = PT_NULL */
lput(HEADR+textsize+datsize); /* file offset */
lput(0L); /* vaddr */
lput(0L); /* paddr */
lput(symsize); /* symbol table size */
lput(lcsize); /* line number size */
lput(0x04L); /* protections = R */
lput(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 */
lput(2|4); /* Section flags */
lput(INITTEXT & ~KMASK); /* Section virtual addr at execution */
lput(HEADR); /* Section file offset */
lput(textsize); /* Section size in bytes */
lput(0); /* Link to another section */
lput(0); /* Additional section information */
lput(0x10000L); /* Section alignment */
lput(0); /* Entry size if section holds table */
lput(7); /* Section name (string tbl index) */
lput(1); /* Section type */
lput(2|1); /* Section flags */
lput(INITDAT & ~KMASK); /* Section virtual addr at execution */
lput(HEADR+textsize); /* Section file offset */
lput(datsize); /* Section size in bytes */
lput(0); /* Link to another section */
lput(0); /* Additional section information */
lput(0x10000L); /* Section alignment */
lput(0); /* Entry size if section holds table */
/* string section header */
lput(12); /* Section name (string tbl index) */
lput(3); /* Section type */
lput(1 << 5); /* Section flags */
lput(0); /* Section virtual addr at execution */
lput(HEADR+textsize+datsize+symsize+3*40); /* Section file offset */
lput(14); /* Section size in bytes */
lput(0); /* Link to another section */
lput(0); /* Additional section information */
lput(1); /* Section alignment */
lput(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;
case 6:
/*
* customised for virtex 4 boot,
* notably the alignment and KMASK masking.
*/
strnput("\177ELF", 4); /* e_ident */
CPUT(1); /* class = 32 bit */
CPUT(2); /* data = MSB */
CPUT(1); /* version = CURRENT */
strnput("", 9);
lput((2L<<16)|20L); /* type = EXEC; machine = PowerPC */
lput(1L); /* version = CURRENT */
lput(entryvalue()); /* entry vaddr */
lput(52L); /* offset to first phdr */
debug['S'] = 1; /* no symbol table */
if(debug['S']){
lput(HEADR+textsize+datsize+symsize); /* offset to first shdr */
lput(0L); /* flags = PPC */
lput((52L<<16)|32L); /* Ehdr & Phdr sizes*/
lput((4L<<16)|40L); /* # Phdrs & Shdr size */
lput((4L<<16)|2L); /* # Shdrs & shdr string size */
}
else{
lput(0L);
lput(0L); /* flags = PPC */
lput((52L<<16)|32L); /* Ehdr & Phdr sizes*/
lput((4L<<16)|0L); /* # Phdrs & Shdr size */
lput((4L<<16)|0L); /* # Shdrs & shdr string size */
}
lput(1L); /* text - type = PT_LOAD */
lput(HEADR); /* file offset */
lput(INITTEXT); /* vaddr */
lput(INITTEXT); /* paddr */
lput(textsize-JMPSZ); /* file size */
lput(textsize-JMPSZ); /* memory size */
lput(0x05L); /* protections = RX */
lput(0); /* alignment */
lput(1L); /* data - type = PT_LOAD */
lput(HEADR+textsize); /* file offset */
lput(INITDAT); /* vaddr */
lput(INITDAT); /* paddr */
lput(datsize); /* file size */
lput(datsize+bsssize); /* memory size */
lput(0x07L); /* protections = RWX */
lput(0); /* alignment */
lput(0L); /* data - type = PT_NULL */
lput(HEADR+textsize+datsize); /* file offset */
lput(0L); /* vaddr */
lput(0L); /* paddr */
lput(symsize); /* symbol table size */
lput(lcsize); /* line number size */
lput(0x04L); /* protections = R */
lput(0x04L); /* alignment code?? */
/* add tiny text section at end with jmp to start */
lput(1L); /* text - type = PT_LOAD */
lput(HEADR+textsize-JMPSZ); /* file offset */
lput(0xFFFFFFFC); /* vaddr */
lput(0xFFFFFFFC); /* paddr */
lput(JMPSZ); /* file size */
lput(JMPSZ); /* memory size */
lput(0x05L); /* protections = RX */
lput(0); /* disable alignment */
cflush();
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
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+4, 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, long v, int ver)
{
int i, f;
if(t == 'f')
s++;
LPUT(v);
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(debug['n']) {
if(t == 'z' || t == 'Z') {
Bprint(&bso, "%c %.8lux ", 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 %.8lux %s<%d>\n", t, v, s, ver);
else
Bprint(&bso, "%c %.8lux %s\n", t, v, s);
}
}
#define MINLC 4
void
asmlc(void)
{
long 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, "%6lux %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, "%6lux %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, "%6lux %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, "%6lux %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;
char *cast;
long l, fl, j, 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 = (char*)&fl;
for(; i<c; i++) {
buf.dbuf[l] = cast[fnuxi8[i+4]];
l++;
}
break;
case 8:
cast = (char*)&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){
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);
}
cast = (char*)&d;
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;
}
break;
}
}
write(cout, buf.dbuf, n);
}