ref: b47c096c8ceb7b96820ec886146a674eb9ad2c7b
dir: /sys/src/libaml/aml.c/
#include <u.h>
#include <libc.h>
#include <aml.h>
typedef struct Interp Interp;
typedef struct Frame Frame;
typedef struct Heap Heap;
typedef struct Method Method;
typedef struct Region Region;
typedef struct Field Field;
typedef struct Name Name;
typedef struct Ref Ref;
typedef struct Env Env;
typedef struct Op Op;
struct Heap {
Heap *link;
short size;
uchar mark;
char tag;
};
#define H2D(h) (((Heap*)(h))+1)
#define D2H(d) (((Heap*)(d))-1)
#define TAG(d) D2H(d)->tag
#define SIZE(d) D2H(d)->size
static char *spacename[] = {
"Mem",
"Io",
"Pcicfg",
"Ebctl",
"Smbus",
"Cmos",
"Pcibar",
"Ipmi",
};
/* field flags */
enum {
AnyAcc = 0x00,
ByteAcc = 0x01,
WordAcc = 0x02,
DWordAcc = 0x03,
QWordAcc = 0x04,
BufferAcc = 0x05,
AccMask = 0x07,
NoLock = 0x10,
Preserve = 0x00,
WriteAsOnes = 0x20,
WriteAsZeros = 0x40,
UpdateMask = 0x60,
};
struct Method {
Name *name;
int narg;
void* (*eval)(void);
uchar *start;
uchar *end;
};
struct Region {
Amlio;
char mapped;
};
struct Field {
void *reg; /* Buffer or Region */
Field *index;
void *indexv;
int flags;
int bitoff;
int bitlen;
};
struct Name {
void *v;
Name *up;
Name *next;
Name *fork;
Name *down;
char seg[4];
};
struct Ref {
void *ref;
void **ptr;
};
struct Env {
void *loc[8];
void *arg[8];
};
struct Op {
char *name;
char *sequence;
void* (*eval)(void);
};
struct Frame {
int tag;
int cond;
char *phase;
uchar *start;
uchar *end;
Op *op;
Env *env;
Name *dot;
void *ref;
void *aux;
int narg;
void *arg[8];
};
struct Interp {
uchar *pc;
Frame *fp;
};
static Interp interp;
static Frame stack[32];
#define PC interp.pc
#define FP interp.fp
#define FB stack
#define FT &stack[nelem(stack)]
static Heap *hp;
enum {
Obad, Onop, Odebug,
Ostr, Obyte, Oword, Odword, Oqword, Oconst,
Onamec, Oname, Oscope, Oalias,
Oreg, Ofld, Oxfld, Opkg, Ovpkg, Oenv, Obuf, Omet,
Odev, Ocpu, Othz, Oprc,
Oadd, Osub, Omod, Omul, Odiv, Oshl, Oshr, Oand, Onand, Oor,
Onor, Oxor, Onot, Olbit, Orbit, Oinc, Odec,
Oland, Olor, Olnot, Oleq, Olgt, Ollt,
Oindex, Omutex, Oevent,
Ocfld, Ocfld0, Ocfld1, Ocfld2, Ocfld4, Ocfld8,
Oif, Oelse, Owhile, Obreak, Oret, Ocall,
Ostore, Oderef, Osize, Oref, Ocref, Ocat,
Oacq, Orel, Ostall, Osleep, Oload, Ounload,
};
static Op optab[];
static uchar octab1[];
static uchar octab2[];
static Name*
rootname(Name *dot)
{
while(dot != dot->up)
dot = dot->up;
return dot;
}
static void
gcmark(void *p)
{
int i;
Env *e;
Field *f;
Heap *h;
Name *n, *d;
if(p == nil)
return;
h = D2H(p);
if(h->mark & 1)
return;
h->mark |= 1;
switch(h->tag){
case 'E':
e = p;
for(i=0; i<nelem(e->loc); i++)
gcmark(e->loc[i]);
for(i=0; i<nelem(e->arg); i++)
gcmark(e->arg[i]);
break;
case 'R':
case 'A':
case 'L':
gcmark(((Ref*)p)->ref);
break;
case 'N':
n = p;
gcmark(n->v);
for(d = n->down; d; d = d->next)
gcmark(d);
gcmark(n->fork);
gcmark(n->up);
break;
case 'p':
for(i=0; i<(SIZE(p)/sizeof(void*)); i++)
gcmark(((void**)p)[i]);
break;
case 'r':
gcmark(((Region*)p)->name);
break;
case 'm':
gcmark(((Method*)p)->name);
break;
case 'f':
case 'u':
f = p;
gcmark(f->reg);
gcmark(f->index);
gcmark(f->indexv);
break;
}
}
static int
gc(void)
{
int i;
Heap *h, **hh;
Frame *f;
for(h = hp; h; h = h->link)
h->mark &= ~1;
for(h = hp; h; h = h->link)
if(h->mark & 2)
gcmark(H2D(h));
for(f = FP; f >= FB; f--){
for(i=0; i<f->narg; i++)
gcmark(f->arg[i]);
gcmark(f->env);
gcmark(f->dot);
gcmark(f->ref);
}
gcmark(amlroot);
i = 0;
hh = &hp;
while(h = *hh){
if(h->mark){
hh = &h->link;
continue;
}
*hh = h->link;
if(h->tag == 'r'){
Region *r = (void*)H2D(h);
if(r->mapped > 0){
if(amldebug)
print("\namlunmapio(%N): %-8s %llux - %llux\n",
(Name*)r->name, spacename[r->space],
r->off, r->off + r->len);
amlunmapio(r);
}
r->mapped = 0;
r->write = nil;
r->read = nil;
r->aux = nil;
r->va = nil;
}
memset(h, ~0, sizeof(Heap)+h->size);
amlfree(h);
i++;
}
return i;
}
static void*
mk(int tag, int size)
{
Heap *h;
int a;
a = sizeof(Heap) + size;
h = amlalloc(a);
h->size = size;
h->tag = tag;
h->link = hp;
hp = h;
return h+1;
}
static uvlong*
mki(uvlong i)
{
uvlong *v;
v = mk('i', sizeof(uvlong));
*v = i;
return v;
}
static char*
mks(char *s)
{
char *r = mk('s', strlen(s)+1);
strcpy(r, s);
return r;
}
static int
pkglen(uchar *p, uchar *e, uchar **np)
{
ulong n;
uchar b;
if(p >= e)
return -1;
b = *p++;
if(b <= 0x3F)
n = b;
else {
n = b & 0xF;
if(p >= e)
return -1;
n += *p++ << 4;
if(b >= 0x80){
if(p >= e)
return -1;
n += *p++ << 12;
}
if(b >= 0xC0){
if(p >= e)
return -1;
n += *p++ << 20;
}
}
if(np)
*np = p;
return n;
}
static Name*
forkname(Name *dot)
{
Name *n;
n = mk('N', sizeof(Name));
*n = *dot;
n->fork = dot;
n->next = n->down = nil;
if(dot->v == dot)
n->v = n;
if(dot->up == dot)
n->up = n;
else {
if(n->up = forkname(dot->up))
n->up->down = n;
}
return n;
}
static Name*
getseg(Name *dot, void *seg, int new)
{
Name *n, *l;
for(n = l = nil; dot; dot = dot->fork){
for(n = dot->down; n; n = n->next){
if(memcmp(seg, n->seg, 4) == 0)
return n;
l = n;
}
if(new){
n = mk('N', sizeof(Name));
memmove(n->seg, seg, sizeof(n->seg));
n->up = dot;
if(l == nil)
dot->down = n;
else
l->next = n;
n->v = n;
break;
}
}
return n;
}
Name*
getname(Name *dot, char *path, int new)
{
char seg[4];
int i, s;
Name *x;
s = !new;
if(*path == '\\'){
path++;
dot = rootname(dot);
s = 0;
}
while(*path == '^'){
path++;
dot = dot->up;
s = 0;
}
do {
for(i=0; i<4; i++){
if(*path == 0 || *path == '.')
break;
seg[i] = *path++;
}
if(i == 0)
break;
while(i < 4)
seg[i++] = '_';
if(s && *path == 0){
for(;;){
if(x = getseg(dot, seg, 0))
break;
if(dot == dot->up)
break;
dot = dot->up;
}
return x;
}
s = 0;
dot = getseg(dot, seg, new);
} while(*path++ == '.');
return dot;
}
static int
fixnames(void *dot, void *arg)
{
void **r, *v;
int i;
if(arg == nil)
r = &((Name*)dot)->v;
else
r = arg;
v = *r;
if(v == nil || v == dot)
return 0;
if(TAG(v) == 'p'){
r = (void**)v;
for(i=0; i<(SIZE(r)/sizeof(void*)); i++)
fixnames(dot, r+i);
return 0;
}
if(TAG(v) == 'n' && (v = getname(dot, v, 0)) != nil)
*r = v;
return 0;
}
static uvlong
getle(uchar *p, int len)
{
uvlong v;
int i;
v = 0ULL;
for(i=0; i<len; i++)
v |= ((uvlong)p[i]) << i*8;
return v;
}
static void
putle(uchar *p, int len, uvlong v)
{
int i;
for(i=0; i<len; i++){
p[i] = v;
v >>= 8;
}
}
static uvlong
rwreg(void *reg, int off, int len, uvlong v, int write)
{
uchar buf[8], *p;
Region *r;
switch(TAG(reg)){
case 'b':
p = reg;
if((off+len) > SIZE(p))
break;
p += off;
if(write)
putle(p, len, v);
else
v = getle(p, len);
return v;
case 'r':
r = reg;
if((off+len) > r->len)
break;
if(r->mapped == 0){
if(amldebug)
print("\namlmapio(%N): %-8s %llux - %llux\n",
(Name*)r->name, spacename[r->space],
r->off, r->off + r->len);
r->mapped = 1;
if(amlmapio(r) < 0)
r->mapped = -1;
}
if(r->mapped <= 0)
break;
if(r->va != nil)
p = r->va + off;
else {
if(len > sizeof(buf))
break;
p = buf;
}
if(write){
if(amldebug)
print("\nrwreg(%N): %-8s [%llux+%x]/%d <- %llux\n",
(Name*)r->name, spacename[r->space],
r->off, off, len, v);
putle(p, len, v);
if(r->write != nil){
if((*r->write)(r, p, len, off) != len)
break;
} else if(p == buf)
break;
} else {
if(r->read != nil){
if((*r->read)(r, p, len, off) != len)
break;
} else if(p == buf)
break;
v = getle(p, len);
if(amldebug)
print("\nrwreg(%N): %-8s [%llux+%x]/%d -> %llux\n",
(Name*)r->name, spacename[r->space],
r->off, off, len, v);
}
return v;
}
return ~0;
}
static uvlong
ival(void *p)
{
int n;
if(p != nil){
switch(TAG(p)){
case 'i':
return *((uvlong*)p);
case 's':
if(*((char*)p) == 0)
break;
return strtoull((char*)p, 0, 16);
case 'b':
n = SIZE(p);
if(n > 0){
if(n > 8) n = 8;
return rwreg(p, 0, n, 0, 0);
}
}
}
return 0;
}
static void *deref(void *p);
static void *store(void *s, void *d);
static int
fieldalign(int flags)
{
switch(flags & AccMask){
default:
case AnyAcc:
case ByteAcc:
case BufferAcc:
return 1;
case WordAcc:
return 2;
case DWordAcc:
return 4;
case QWordAcc:
return 8;
}
}
static void*
rwfield(Field *f, void *v, int write)
{
int boff, blen, wo, ws, wl, wa, wd, i;
uvlong w, m;
void *reg;
uchar *b;
if(f == nil || (reg = deref(f->reg)) == nil)
return nil;
if(f->index)
store(f->indexv, f->index);
blen = f->bitlen;
if(write){
if(v && TAG(v) == 'b'){
b = v;
if(SIZE(b)*8 < blen)
blen = SIZE(b)*8;
} else {
w = ival(v);
b = mk('b', (blen+7)/8);
putle(b, SIZE(b), w);
}
} else
b = mk('b', (blen+7)/8);
wa = fieldalign(f->flags);
wd = wa*8;
boff = 0;
while((wl = (blen-boff)) > 0){
wo = (f->bitoff+boff) / wd;
ws = (f->bitoff+boff) % wd;
if(wl > (wd - ws))
wl = wd - ws;
if(write){
w = 0;
for(i = 0; i < wl; i++, boff++)
if(b[boff/8] & (1<<(boff%8)))
w |= 1ULL<<i;
w <<= ws;
if(wl != wd){
m = ((1ULL<<wl)-1) << ws;
w |= rwreg(reg, wo*wa, wa, 0, 0) & ~m;
}
rwreg(reg, wo*wa, wa, w, 1);
} else {
w = rwreg(reg, wo*wa, wa, 0, 0) >> ws;
for(i = 0; i < wl; i++, boff++){
b[boff/8] |= (w&1)<<(boff%8);
w >>= 1;
}
}
}
if(write)
return nil;
if(blen > 64)
return b;
w = getle(b, SIZE(b));
return mki(w);
}
static void*
deref(void *p)
{
if(p) switch(TAG(p)){
case 'N':
return ((Name*)p)->v;
case 'R': case 'A': case 'L':
return *((Ref*)p)->ptr;
case 'f': case 'u':
return rwfield(p, nil, 0);
}
return p;
}
static void*
copy(int tag, void *s)
{
static char hex[] = "0123456789ABCDEF";
uvlong v;
void *d;
int i, n;
if(tag == 0){
if(s == nil)
return nil;
tag = TAG(s);
}
if(s == nil || TAG(s) == 'i'){
n = 4;
v = ival(s);
if(v > 0xFFFFFFFFULL)
n <<= 1;
switch(tag){
case 'b':
d = mk(tag, n);
rwreg(d, 0, n, v, 1);
return d;
case 's':
n <<= 1;
d = mk(tag, n+1);
((char*)d)[n] = 0;
while(n > 0){
((char*)d)[--n] = hex[v & 0xF];
v >>= 4;
}
return d;
case 'i':
if(v == 0ULL)
return nil;
return mki(v);
}
} else {
n = SIZE(s);
switch(tag){
case 's':
if(TAG(s) == 'b'){
d = mk(tag, n*3 + 1);
for(i=0; i<n; i++){
((char*)d)[i*3 + 0] = hex[((uchar*)s)[i] >> 4];
((char*)d)[i*3 + 1] = hex[((uchar*)s)[i] & 0xF];
((char*)d)[i*3 + 2] = ' ';
}
((char*)d)[n*3] = 0;
return d;
}
/* no break */
case 'b':
if(TAG(s) == 's'){
n = strlen(s);
/* zero length string is converted to zero length buffer */
if(n > 0) n++;
}
d = mk(tag, n);
memmove(d, s, n);
return d;
}
}
return s;
}
static void*
store(void *s, void *d)
{
void *p, **pp;
if(d == nil)
return nil;
switch(TAG(d)){
default:
return nil;
case 'A':
s = deref(s);
/* no break */
case 'R': case 'L':
pp = ((Ref*)d)->ptr;
while((p = *pp) != nil){
switch(TAG(p)){
case 'R': case 'A': case 'L':
pp = ((Ref*)p)->ptr;
break;
case 'N':
pp = &((Name*)p)->v;
break;
}
if(*pp == p)
break;
}
break;
case 'N':
pp = &((Name*)d)->v;
break;
}
p = *pp;
if(p != nil && TAG(p) != 'N'){
switch(TAG(p)){
case 'f':
case 'u':
rwfield(p, s, 1);
return d;
}
if(TAG(d) != 'A' && TAG(d) != 'L'){
*pp = copy(TAG(p), s);
return d;
}
}
*pp = copy(0, s);
return d;
}
static int
Nfmt(Fmt *f)
{
char buf[5];
int i;
Name *n;
n = va_arg(f->args, Name*);
if(n == nil)
return fmtprint(f, "?NIL");
if(n == n->up)
return fmtprint(f, "\\");
strncpy(buf, n->seg, 4);
buf[4] = 0;
for(i=3; i>0; i--){
if(buf[i] != '_')
break;
buf[i] = 0;
}
if(n->up == n->up->up)
return fmtprint(f, "\\%s", buf);
return fmtprint(f, "%N.%s", n->up, buf);
}
static int
Vfmt(Fmt *f)
{
void *p;
int i, n, c;
Env *e;
Field *l;
Name *nm;
Method *m;
Region *g;
Ref *r;
p = va_arg(f->args, void*);
if(p == nil)
return fmtprint(f, "nil");
c = TAG(p);
switch(c){
case 'N':
nm = p;
if(nm->v != nm)
return fmtprint(f, "%N=%V", nm, nm->v);
return fmtprint(f, "%N=*", nm);
case 'A':
case 'L':
r = p;
e = r->ref;
if(c == 'A')
return fmtprint(f, "Arg%zd=%V", r->ptr - e->arg, *r->ptr);
if(c == 'L')
return fmtprint(f, "Local%zd=%V", r->ptr - e->loc, *r->ptr);
case 'n':
return fmtprint(f, "%s", (char*)p);
case 's':
return fmtprint(f, "\"%s\"", (char*)p);
case 'i':
return fmtprint(f, "%#llux", *((uvlong*)p));
case 'p':
n = SIZE(p)/sizeof(void*);
fmtprint(f, "Package(%d){", n);
for(i=0; i<n; i++){
if(i > 0)
fmtprint(f, ", ");
fmtprint(f, "%V", ((void**)p)[i]);
}
fmtprint(f, "}");
return 0;
case 'b':
n = SIZE(p);
fmtprint(f, "Buffer(%d){", n);
for(i=0; i<n; i++){
if(i > 0)
fmtprint(f, ", ");
fmtprint(f, "%.2uX", ((uchar*)p)[i]);
}
fmtprint(f, "}");
return 0;
case 'r':
g = p;
return fmtprint(f, "Region(%s, %#llux, %#llux)",
spacename[g->space & 7], g->off, g->len);
case 'm':
m = p;
fmtprint(f, "%N(", m->name);
for(i=0; i < m->narg; i++){
if(i > 0)
fmtprint(f, ", ");
fmtprint(f, "Arg%d", i);
}
fmtprint(f, ")");
return 0;
case 'u':
fmtprint(f, "Buffer");
/* no break */
case 'f':
l = p;
if(l->index)
return fmtprint(f, "IndexField(%x, %x, %x) @ %V[%V]",
l->flags, l->bitoff, l->bitlen, l->index, l->indexv);
return fmtprint(f, "Field(%x, %x, %x) @ %V",
l->flags, l->bitoff, l->bitlen, l->reg);
default:
return fmtprint(f, "%c:%p", c, p);
}
}
static void
dumpregs(void)
{
Frame *f;
Env *e;
int i;
print("\n*** dumpregs: PC=%p FP=%p\n", PC, FP);
e = nil;
for(f = FP; f >= FB; f--){
print("%.8p.%.2zx: %-8s %N\t", f->start, f-FB, f->phase, f->dot);
if(f->op)
print("%s", f->op->name);
print("(");
for(i=0; i<f->narg; i++){
if(i > 0)
print(", ");
print("%V", f->arg[i]);
}
print(")\n");
if(e == f->env)
continue;
if(e = f->env){
for(i=0; i<nelem(e->arg); i++)
print("Arg%d=%V ", i, e->arg[i]);
print("\n");
for(i=0; i<nelem(e->loc); i++)
print("Local%d=%V ", i, e->loc[i]);
print("\n");
}
}
}
static int
xec(uchar *pc, uchar *end, Name *dot, Env *env, void **pret)
{
static int loop;
int i, c;
void *r;
PC = pc;
FP = FB;
FP->tag = 0;
FP->cond = 0;
FP->narg = 0;
FP->phase = "}";
FP->start = PC;
FP->end = end;
FP->aux = end;
FB->ref = nil;
FP->dot = dot;
FP->env = env;
FP->op = nil;
for(;;){
if((++loop & 127) == 0)
gc();
if(amldebug)
print("\n%.8p.%.2zx %-8s\t%N\t", PC, FP - FB, FP->phase, FP->dot);
r = nil;
c = *FP->phase++;
switch(c){
default:
if(PC >= FP->end){
Overrun:
print("aml: PC overrun frame end");
goto Out;
}
FP++;
if(FP >= FT){
print("aml: frame stack overflow");
goto Out;
}
*FP = FP[-1];
FP->aux = nil;
FP->ref = nil;
FP->tag = c;
FP->start = PC;
c = *PC++;
if(amldebug) print("%.2X", c);
if(c == '['){
if(PC >= FP->end)
goto Overrun;
c = *PC++;
if(amldebug) print("%.2X", c);
c = octab2[c];
}else
c = octab1[c];
FP->op = &optab[c];
FP->narg = 0;
FP->phase = FP->op->sequence;
if(amldebug) print("\t%s %s", FP->op->name, FP->phase);
continue;
case '{':
end = PC;
c = pkglen(PC, FP->end, &PC);
end += c;
if(c < 0 || end > FP->end)
goto Overrun;
FP->end = end;
continue;
case ',':
FP->start = PC;
continue;
case 's':
if(end = memchr(PC, 0, FP->end - PC))
end++;
else
end = FP->end;
c = end - PC;
r = mk('s', c+1);
memmove(r, PC, c);
((uchar*)r)[c] = 0;
PC = end;
break;
case '1':
case '2':
case '4':
case '8':
end = PC+(c-'0');
if(end > FP->end)
goto Overrun;
else {
r = mki(*PC++);
for(i = 8; PC < end; i += 8)
*((uvlong*)r) |= ((uvlong)*PC++) << i;
}
break;
case '}':
case 0:
if(FP->op){
if(amldebug){
print("*%p,%V\t%s(", FP->aux, FP->ref, FP->op->name);
for(i = 0; i < FP->narg; i++){
if(i > 0)
print(", ");
print("%V", FP->arg[i]);
}
print(")");
}
for(i = FP->narg; i < nelem(FP->arg); i++)
FP->arg[i] = nil;
r = FP->op->eval();
if(amldebug)
print(" -> %V", r);
}
c = FP->phase[-1];
if(c == '}' && PC < FP->end){
FP->narg = 0;
FP->phase = "*}";
continue;
}
if(r) switch(FP->tag){
case '@':
break;
case 'n':
case 'N':
if(TAG(r) != 'N')
r = nil;
break;
default:
if((r = deref(r)) == nil)
break;
switch(TAG(r)){
case 'f': case 'u':
r = rwfield(r, nil, 0);
break;
case 'm': {
Method *m = r;
FP->ref = m;
FP->narg = 0;
FP->phase = "********}" + (8 - m->narg);
FP->op = &optab[Ocall];
continue;
}
}
}
FP--;
break;
}
if(FP < FB){
if(pret){
if(amldebug) print(" -> %V\n", r);
*pret = r;
}
return 0;
}
FP->arg[FP->narg++] = r;
}
Out:
if(amldebug)
dumpregs();
return -1;
}
static void*
evalnamec(void)
{
static char name[1024];
char *d;
void *r;
int c;
c = 1;
d = name;
PC = FP->start;
if(*PC == '\\')
*d++ = *PC++;
while(*PC == '^'){
if(d >= &name[sizeof(name)-1]){
Toolong:
*d = 0;
print("aml: name too long: %s\n", name);
PC = FP->end;
return nil;
}
*d++ = *PC++;
}
if(*PC == '.'){
PC++;
c = 2;
} else if(*PC == '/'){
PC++;
c = *PC++;
} else if(*PC == 0){
PC++;
c = 0;
}
while(c > 0){
if(d >= &name[sizeof(name)-5])
goto Toolong;
*d++ = *PC++;
*d++ = *PC++;
*d++ = *PC++;
*d++ = *PC++;
while((d > &name[0]) && (d[-1] == '_' || d[-1] == 0))
d--;
if(--c > 0)
*d++ = '.';
}
*d = 0;
if((r = getname(FP->dot, name, FP->tag == 'N')) == nil){
r = mks(name);
D2H(r)->tag = 'n'; /* unresolved name */
}
return r;
}
static void*
evaliarg0(void)
{
return FP->arg[0];
}
static void*
evalconst(void)
{
switch(FP->start[0]){
case 0x01:
return mki(1);
case 0xFF:
return mki(-1);
}
return nil;
}
static void*
evalbuf(void)
{
int n, m;
uchar *p;
n = ival(FP->arg[0]);
p = mk('b', n);
m = FP->end - PC;
if(m > n)
m = n;
memmove(p, PC, m);
PC = FP->end;
return p;
}
static void*
evalpkg(void)
{
void **p, **x;
int n;
if((p = FP->ref) != nil){
x = FP->aux;
if(x >= p && x < (p+(SIZE(p)/sizeof(void*)))){
*x++ = FP->arg[0];
FP->aux = x;
}
}else {
n = ival(FP->arg[0]);
if(n < 0) n = 0;
p = mk('p', n*sizeof(void*));
FP->aux = p;
FP->ref = p;
}
return p;
}
static void*
evalname(void)
{
Name *n;
if(n = FP->arg[0])
n->v = FP->arg[1];
else
PC = FP->end;
return nil;
}
static void*
evalscope(void)
{
Name *n;
if(n = FP->arg[0])
FP->dot = n;
else
PC = FP->end;
FP->op = nil;
return nil;
}
static void*
evalalias(void)
{
Name *n;
if(n = FP->arg[1])
n->v = deref(FP->arg[0]);
return nil;
}
static void*
evalmet(void)
{
Name *n;
Method *m;
if((n = FP->arg[0]) != nil){
m = mk('m', sizeof(Method));
m->narg = ival(FP->arg[1]) & 7;
m->start = PC;
m->end = FP->end;
m->name = n;
n->v = m;
}
PC = FP->end;
return nil;
}
static void*
evalreg(void)
{
Name *n;
Region *r;
if((n = FP->arg[0]) != nil){
r = mk('r', sizeof(Region));
r->space = ival(FP->arg[1]);
r->off = ival(FP->arg[2]);
r->len = ival(FP->arg[3]);
r->name = n;
r->va = nil;
n->v = r;
}
return nil;
}
static void*
evalcfield(void)
{
void *r;
Field *f;
Name *n;
int c;
r = FP->arg[0];
if(r == nil || (TAG(r) != 'b' && TAG(r) != 'r'))
return nil;
c = FP->op - optab;
if(c == Ocfld)
n = FP->arg[3];
else
n = FP->arg[2];
if(n == nil || TAG(n) != 'N')
return nil;
if(TAG(r) == 'b')
f = mk('u', sizeof(Field));
else
f = mk('f', sizeof(Field));
switch(c){
case Ocfld:
f->bitoff = ival(FP->arg[1]);
f->bitlen = ival(FP->arg[2]);
break;
case Ocfld0:
f->bitoff = ival(FP->arg[1]);
f->bitlen = 1;
break;
case Ocfld1:
case Ocfld2:
case Ocfld4:
case Ocfld8:
f->bitoff = 8*ival(FP->arg[1]);
f->bitlen = 8*(c - Ocfld0);
break;
}
f->reg = r;
n->v = f;
return nil;
}
static void*
evalfield(void)
{
int flags, bitoff, wa, n;
Field *f, *df;
Name *d;
uchar *p;
df = nil;
flags = 0;
bitoff = 0;
switch(FP->op - optab){
case Ofld:
flags = ival(FP->arg[1]);
break;
case Oxfld:
df = deref(FP->arg[1]);
if(df == nil || TAG(df) != 'f')
goto Out;
flags = ival(FP->arg[2]);
break;
}
p = PC;
if(p >= FP->end)
return nil;
while(p < FP->end){
if(*p == 0x00){
p++;
if((n = pkglen(p, FP->end, &p)) < 0)
break;
bitoff += n;
continue;
}
if(*p == 0x01){
p++;
flags = *p;
p += 2;
continue;
}
if(p+4 >= FP->end)
break;
if((d = getseg(FP->dot, p, 1)) == nil)
break;
if((n = pkglen(p+4, FP->end, &p)) < 0)
break;
f = mk('f', sizeof(Field));
f->flags = flags;
f->bitlen = n;
switch(FP->op - optab){
case Ofld:
f->reg = FP->arg[0];
f->bitoff = bitoff;
break;
case Oxfld:
wa = fieldalign(df->flags);
f->reg = df->reg;
f->bitoff = df->bitoff + (bitoff % (wa*8));
f->indexv = mki((bitoff/(wa*8))*wa);
f->index = FP->arg[0];
break;
}
bitoff += n;
d->v = f;
}
Out:
PC = FP->end;
return nil;
}
static void*
evalnop(void)
{
return nil;
}
static void*
evalbad(void)
{
int i;
print("aml: bad opcode %p: ", PC);
for(i=0; i < 8 && (FP->start+i) < FP->end; i++){
if(i > 0)
print(" ");
print("%.2X", FP->start[i]);
}
if((FP->start+i) < FP->end)
print("...");
print("\n");
PC = FP->end;
return nil;
}
static void*
evalcond(void)
{
switch(FP->op - optab){
case Oif:
if(FP <= FB)
break;
FP[-1].cond = ival(FP->arg[0]) != 0;
if(!FP[-1].cond)
PC = FP->end;
break;
case Oelse:
if(FP <= FB)
break;
if(FP[-1].cond)
PC = FP->end;
break;
case Owhile:
if(FP->aux){
if(PC >= FP->end){
PC = FP->start;
FP->aux = nil;
}
return nil;
}
FP->aux = FP->end;
if(ival(FP->arg[0]) == 0){
PC = FP->end;
break;
}
return nil;
}
FP->op = nil;
return nil;
}
static void*
evalcmp(void)
{
void *a, *b;
int tag, c;
a = FP->arg[0];
b = FP->arg[1];
if(a == nil || TAG(a) == 'i'){
c = ival(a) - ival(b);
} else {
tag = TAG(a);
if(b == nil || TAG(b) != tag)
b = copy(tag, b);
if(TAG(b) != tag)
return nil; /* botch */
switch(tag){
default:
return nil; /* botch */
case 's':
c = strcmp((char*)a, (char*)b);
break;
case 'b':
if((c = SIZE(a) - SIZE(b)) == 0)
c = memcmp(a, b, SIZE(a));
break;
}
}
switch(FP->op - optab){
case Oleq:
if(c == 0) return mki(1);
break;
case Olgt:
if(c > 0) return mki(1);
break;
case Ollt:
if(c < 0) return mki(1);
break;
}
return nil;
}
static void*
evalcall(void)
{
Method *m;
Env *e;
int i;
if(FP->aux){
if(PC >= FP->end){
PC = FP->aux;
FP->end = PC;
}
return nil;
}
m = FP->ref;
e = mk('E', sizeof(Env));
for(i=0; i<FP->narg; i++)
e->arg[i] = deref(FP->arg[i]);
FP->env = e;
FP->narg = 0;
FP->dot = m->name;
if(m->eval != nil){
FP->op = nil;
FP->end = PC;
return (*m->eval)();
}
FP->dot = forkname(FP->dot);
FP->aux = PC;
FP->start = m->start;
FP->end = m->end;
PC = FP->start;
return nil;
}
static void*
evalret(void)
{
void *r = FP->arg[0];
int brk = (FP->op - optab) != Oret;
while(--FP >= FB){
switch(FP->op - optab){
case Owhile:
if(!brk)
continue;
PC = FP->end;
return nil;
case Ocall:
PC = FP->aux;
return r;
}
}
FP = FB;
PC = FB->end;
return r;
}
static void*
evalenv(void)
{
Ref *r;
Env *e;
int c;
if((e = FP->env) == nil)
return nil;
c = FP->start[0];
if(c >= 0x60 && c <= 0x67){
r = mk('L', sizeof(Ref));
r->ptr = &e->loc[c - 0x60];
} else if(c >= 0x68 && c <= 0x6E){
r = mk('A', sizeof(Ref));
r->ptr = &e->arg[c - 0x68];
} else
return nil;
r->ref = e;
return r;
}
static void*
evalstore(void)
{
return store(FP->arg[0], FP->arg[1]);
}
static void*
evalcat(void)
{
void *r, *a, *b;
int tag, n, m;
a = FP->arg[0];
b = FP->arg[1];
if(a == nil || TAG(a) == 'i')
a = copy('b', a); /* Concat(Int, ???) -> Buf */
tag = TAG(a);
if(b == nil || TAG(b) != tag)
b = copy(tag, b);
if(TAG(b) != tag)
return nil; /* botch */
switch(tag){
default:
return nil; /* botch */
case 'b':
n = SIZE(a);
m = SIZE(b);
r = mk('b', n + m);
memmove(r, a, n);
memmove((uchar*)r + n, b, m);
break;
case 's':
n = strlen((char*)a);
m = strlen((char*)b);
r = mk('s', n + m + 1);
memmove(r, a, n);
memmove((char*)r + n, b, m);
((char*)r)[n+m] = 0;
break;
}
store(r, FP->arg[2]);
return r;
}
static void*
evalindex(void)
{
Field *f;
void *p;
Ref *r;
int x;
x = ival(FP->arg[1]);
if(p = deref(FP->arg[0])) switch(TAG(p)){
case 's':
if(x >= strlen((char*)p))
break;
/* no break */
case 'b':
if(x < 0 || x >= SIZE(p))
break;
f = mk('u', sizeof(Field));
f->reg = p;
f->bitlen = 8;
f->bitoff = 8*x;
store(f, FP->arg[2]);
return f;
case 'p':
if(x < 0 || x >= (SIZE(p)/sizeof(void*)))
break;
if(TAG(FP->arg[0]) == 'A' || TAG(FP->arg[0]) == 'L')
r = mk(TAG(FP->arg[0]), sizeof(Ref));
else
r = mk('R', sizeof(Ref));
r->ref = p;
r->ptr = ((void**)p) + x;
store(r, FP->arg[2]);
return r;
}
return nil;
}
static void*
evalcondref(void)
{
void *s;
if((s = FP->arg[0]) == nil)
return nil;
store(s, FP->arg[1]);
return mki(1);
}
static void*
evalsize(void)
{
return mki(amllen(FP->arg[0]));
}
static void*
evalderef(void)
{
void *p;
if(p = FP->arg[0]){
if(TAG(p) == 's' || TAG(p) == 'n')
p = getname(FP->dot, (char*)p, 0);
p = deref(p);
}
return p;
}
static void*
evalarith(void)
{
uvlong v, d;
void *r;
int i;
r = nil;
switch(FP->op - optab){
case Oadd:
r = mki(ival(FP->arg[0]) + ival(FP->arg[1]));
break;
case Osub:
r = mki(ival(FP->arg[0]) - ival(FP->arg[1]));
break;
case Omul:
r = mki(ival(FP->arg[0]) * ival(FP->arg[1]));
break;
case Omod:
case Odiv:
v = ival(FP->arg[0]);
d = ival(FP->arg[1]);
if(d == 0){
print("aml: division by zero: PC=%#p\n", PC);
return nil;
}
r = mki(v % d);
store(r, FP->arg[2]);
if((FP->op - optab) != Odiv)
return r;
r = mki(v / d);
store(r, FP->arg[3]);
return r;
case Oshl:
r = mki(ival(FP->arg[0]) << ival(FP->arg[1]));
break;
case Oshr:
r = mki(ival(FP->arg[0]) >> ival(FP->arg[1]));
break;
case Oand:
r = mki(ival(FP->arg[0]) & ival(FP->arg[1]));
break;
case Onand:
r = mki(~(ival(FP->arg[0]) & ival(FP->arg[1])));
break;
case Oor:
r = mki(ival(FP->arg[0]) | ival(FP->arg[1]));
break;
case Onor:
r = mki(~(ival(FP->arg[0]) | ival(FP->arg[1])));
break;
case Oxor:
r = mki(ival(FP->arg[0]) ^ ival(FP->arg[1]));
break;
case Onot:
r = mki(~ival(FP->arg[0]));
store(r, FP->arg[1]);
return r;
case Olbit:
v = ival(FP->arg[0]);
if(v == 0)
break;
for(i=0; (v & 1) == 0; i++)
v >>= 1;
r = mki(i+1);
break;
case Orbit:
v = ival(FP->arg[0]);
if(v == 0)
break;
for(i=0; v != 0; i++)
v >>= 1;
r = mki(i);
break;
case Oland:
return mki(ival(FP->arg[0]) && ival(FP->arg[1]));
case Olor:
return mki(ival(FP->arg[0]) || ival(FP->arg[1]));
case Olnot:
return mki(ival(FP->arg[0]) == 0);
case Oinc:
r = mki(ival(deref(FP->arg[0]))+1);
store(r, FP->arg[0]);
return r;
case Odec:
r = mki(ival(deref(FP->arg[0]))-1);
store(r, FP->arg[0]);
return r;
}
store(r, FP->arg[2]);
return r;
}
static void*
evalload(void)
{
enum { LenOffset = 4, HdrLen = 36 };
uvlong *tid;
Region *r;
int l;
tid = nil;
if(FP->aux){
if(PC >= FP->end){
amlenum(amlroot, nil, fixnames, nil);
FP->aux = nil;
FP->end = PC;
tid = mki(1); /* fake */
}
} else {
store(nil, FP->arg[1]);
if(FP->arg[0] == nil)
return nil;
l = rwreg(FP->arg[0], LenOffset, 4, 0, 0);
if(l <= HdrLen)
return nil;
FP->aux = PC; /* save */
FP->ref = FP->arg[0];
switch(TAG(FP->ref)){
case 'b':
if(SIZE(FP->ref) < l)
return nil;
PC = (uchar*)FP->ref + HdrLen;
break;
case 'r':
r = FP->ref;
if(r->len < l || r->va == nil || r->mapped <= 0)
return nil;
PC = (uchar*)r->va + HdrLen;
break;
default:
return nil;
}
FP->end = PC + (l - HdrLen);
FP->dot = amlroot;
FP->env = nil;
tid = mki(1); /* fake */
store(tid, FP->arg[1]);
}
return tid;
}
static void*
evalstall(void)
{
amldelay(ival(FP->arg[0]));
return nil;
}
static void*
evalsleep(void)
{
amldelay(ival(FP->arg[0])*1000);
return nil;
}
static Op optab[] = {
[Obad] "", "", evalbad,
[Onop] "Noop", "", evalnop,
[Odebug] "Debug", "", evalnop,
[Ostr] ".str", "s", evaliarg0,
[Obyte] ".byte", "1", evaliarg0,
[Oword] ".word", "2", evaliarg0,
[Odword] ".dword", "4", evaliarg0,
[Oqword] ".qword", "8", evaliarg0,
[Oconst] ".const", "", evalconst,
[Onamec] ".name", "", evalnamec,
[Oenv] ".env", "", evalenv,
[Oname] "Name", "N*", evalname,
[Oscope] "Scope", "{n}", evalscope,
[Oalias] "Alias", "nN", evalalias,
[Odev] "Device", "{N}", evalscope,
[Ocpu] "Processor", "{N141}", evalscope,
[Othz] "ThermalZone", "{N}", evalscope,
[Oprc] "PowerResource", "{N12}", evalscope,
[Oreg] "OperationRegion", "N1ii", evalreg,
[Ofld] "Field", "{n1", evalfield,
[Oxfld] "IndexField", "{nn1", evalfield,
[Ocfld] "CreateField", "*iiN", evalcfield,
[Ocfld0] "CreateBitField", "*iN", evalcfield,
[Ocfld1] "CreateByteField", "*iN", evalcfield,
[Ocfld2] "CreateWordField", "*iN", evalcfield,
[Ocfld4] "CreateDWordField", "*iN", evalcfield,
[Ocfld8] "CreateQWordField", "*iN", evalcfield,
[Opkg] "Package", "{1}", evalpkg,
[Ovpkg] "VarPackage", "{i}", evalpkg,
[Obuf] "Buffer", "{i", evalbuf,
[Omet] "Method", "{N1", evalmet,
[Oadd] "Add", "ii@", evalarith,
[Osub] "Subtract", "ii@", evalarith,
[Omod] "Mod", "ii@", evalarith,
[Omul] "Multiply", "ii@", evalarith,
[Odiv] "Divide", "ii@@", evalarith,
[Oshl] "ShiftLef", "ii@", evalarith,
[Oshr] "ShiftRight", "ii@", evalarith,
[Oand] "And", "ii@", evalarith,
[Onand] "Nand", "ii@", evalarith,
[Oor] "Or", "ii@", evalarith,
[Onor] "Nor", "ii@", evalarith,
[Oxor] "Xor", "ii@", evalarith,
[Onot] "Not", "i@", evalarith,
[Olbit] "FindSetLeftBit", "i@", evalarith,
[Orbit] "FindSetRightBit", "i@", evalarith,
[Oinc] "Increment", "@", evalarith,
[Odec] "Decrement", "@", evalarith,
[Oland] "LAnd", "ii", evalarith,
[Olor] "LOr", "ii", evalarith,
[Olnot] "LNot", "i", evalarith,
[Oleq] "LEqual", "**", evalcmp,
[Olgt] "LGreater", "**", evalcmp,
[Ollt] "LLess", "**", evalcmp,
[Omutex] "Mutex", "N1", evalnop,
[Oevent] "Event", "N", evalnop,
[Oif] "If", "{i}", evalcond,
[Oelse] "Else", "{}", evalcond,
[Owhile] "While", "{,i}", evalcond,
[Obreak] "Break", "", evalret,
[Oret] "Return", "*", evalret,
[Ocall] "Call", "", evalcall,
[Ostore] "Store", "*@", evalstore,
[Oindex] "Index", "@i@", evalindex,
[Osize] "SizeOf", "*", evalsize,
[Oref] "RefOf", "@", evaliarg0,
[Ocref] "CondRefOf", "@@", evalcondref,
[Oderef] "DerefOf", "@", evalderef,
[Ocat] "Concatenate", "**@", evalcat,
[Oacq] "Acquire", "@2", evalnop,
[Orel] "Release", "@", evalnop,
[Ostall] "Stall", "i", evalstall,
[Osleep] "Sleep", "i", evalsleep,
[Oload] "Load", "*@}", evalload,
[Ounload] "Unload", "@", evalnop,
};
static uchar octab1[] = {
/* 00 */ Oconst, Oconst, Obad, Obad, Obad, Obad, Oalias, Obad,
/* 08 */ Oname, Obad, Obyte, Oword, Odword, Ostr, Oqword, Obad,
/* 10 */ Oscope, Obuf, Opkg, Ovpkg, Omet, Obad, Obad, Obad,
/* 18 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* 20 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* 28 */ Obad, Obad, Obad, Obad, Obad, Obad, Onamec, Onamec,
/* 30 */ Onamec, Onamec, Onamec, Onamec, Onamec, Onamec, Onamec, Onamec,
/* 38 */ Onamec, Onamec, Obad, Obad, Obad, Obad, Obad, Obad,
/* 40 */ Obad, Onamec, Onamec, Onamec, Onamec, Onamec, Onamec, Onamec,
/* 48 */ Onamec, Onamec, Onamec, Onamec, Onamec, Onamec, Onamec, Onamec,
/* 50 */ Onamec, Onamec, Onamec, Onamec, Onamec, Onamec, Onamec, Onamec,
/* 58 */ Onamec, Onamec, Onamec, Obad, Onamec, Obad, Onamec, Onamec,
/* 60 */ Oenv, Oenv, Oenv, Oenv, Oenv, Oenv, Oenv, Oenv,
/* 68 */ Oenv, Oenv, Oenv, Oenv, Oenv, Oenv, Oenv, Obad,
/* 70 */ Ostore, Oref, Oadd, Ocat, Osub, Oinc, Odec, Omul,
/* 78 */ Odiv, Oshl, Oshr, Oand, Onand, Oor, Onor, Oxor,
/* 80 */ Onot, Olbit, Orbit, Oderef, Obad, Omod, Obad, Osize,
/* 88 */ Oindex, Obad, Ocfld4, Ocfld2, Ocfld1, Ocfld0, Obad, Ocfld8,
/* 90 */ Oland, Olor, Olnot, Oleq, Olgt, Ollt, Obad, Obad,
/* 98 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* A0 */ Oif, Oelse, Owhile, Onop, Oret, Obreak, Obad, Obad,
/* A8 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* B0 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* B8 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* C0 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* C8 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* D0 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* D8 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* E0 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* E8 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* F0 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* F8 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Oconst,
};
static uchar octab2[] = {
/* 00 */ Obad, Omutex, Oevent, Obad, Obad, Obad, Obad, Obad,
/* 08 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* 10 */ Obad, Obad, Ocref, Ocfld, Obad, Obad, Obad, Obad,
/* 18 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* 20 */ Oload, Ostall, Osleep, Oacq, Obad, Obad, Obad, Orel,
/* 28 */ Obad, Obad, Ounload,Obad, Obad, Obad, Obad, Obad,
/* 30 */ Obad, Odebug, Obad, Obad, Obad, Obad, Obad, Obad,
/* 38 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* 40 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* 48 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* 50 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* 58 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* 60 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* 68 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* 70 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* 78 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* 80 */ Oreg, Ofld, Odev, Ocpu, Oprc, Othz, Oxfld, Obad,
/* 88 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* 90 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* 98 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* A0 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* A8 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* B0 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* B8 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* C0 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* C8 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* D0 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* D8 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* E0 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* E8 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* F0 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
/* F8 */ Obad, Obad, Obad, Obad, Obad, Obad, Obad, Obad,
};
int
amltag(void *p)
{
return p ? TAG(p) : 0;
}
void*
amlval(void *p)
{
return deref(p);
}
uvlong
amlint(void *p)
{
return ival(p);
}
int
amllen(void *p)
{
while(p){
switch(TAG(p)){
case 'R':
p = *((Ref*)p)->ptr;
continue;
case 'n':
case 's':
return strlen((char*)p);
case 'p':
return SIZE(p)/sizeof(void*);
default:
return SIZE(p);
}
}
return 0;
}
void*
amlnew(char tag, int len)
{
switch(tag){
case 'i':
return mki(0);
case 'n':
case 's':
return mk(tag, len + 1);
case 'p':
return mk(tag, len * sizeof(void*));
default:
return mk(tag, len);
}
}
static void*
evalosi(void)
{
static char *w[] = {
"Windows 2001",
"Windows 2001 SP1",
"Windows 2001 SP2",
"Windows 2006",
};
char *s;
int i;
s = FP->env->arg[0];
if(s == nil || TAG(s) != 's')
return nil;
for(i = 0; i < nelem(w); i++)
if(strcmp(s, w[i]) == 0)
return mki(0xFFFFFFFF);
return nil;
}
void
amlinit(void)
{
Name *n;
fmtinstall('V', Vfmt);
fmtinstall('N', Nfmt);
n = mk('N', sizeof(Name));
n->up = n;
amlroot = n;
getname(amlroot, "_GPE", 1);
getname(amlroot, "_PR", 1);
getname(amlroot, "_SB", 1);
getname(amlroot, "_TZ", 1);
getname(amlroot, "_SI", 1);
getname(amlroot, "_GL", 1);
if(n = getname(amlroot, "_REV", 1))
n->v = mki(2);
if(n = getname(amlroot, "_OS", 1))
n->v = mks("Microsoft Windows");
if(n = getname(amlroot, "_OSI", 1)){
Method *m;
m = mk('m', sizeof(Method));
m->narg = 1;
m->eval = evalosi;
m->name = n;
n->v = m;
}
}
void
amlexit(void)
{
amlroot = nil;
FP = FB-1;
gc();
}
int
amlload(uchar *data, int len)
{
int ret;
ret = xec(data, data+len, amlroot, nil, nil);
amlenum(amlroot, nil, fixnames, nil);
return ret;
}
void*
amlwalk(void *dot, char *name)
{
return getname(dot, name, 0);
}
void
amlenum(void *dot, char *seg, int (*proc)(void *, void *), void *arg)
{
Name *n, *d;
int rec;
d = dot;
if(d == nil || TAG(d) != 'N')
return;
do {
rec = 1;
if(seg == nil || memcmp(seg, d->seg, sizeof(d->seg)) == 0)
rec = (*proc)(d, arg) == 0;
for(n = d->down; n && rec; n = n->next)
amlenum(n, seg, proc, arg);
d = d->fork;
} while(d);
}
int
amleval(void *dot, char *fmt, ...)
{
va_list a;
Method *m;
void **r;
Env *e;
int i;
va_start(a, fmt);
e = mk('E', sizeof(Env));
for(i=0;*fmt;fmt++){
switch(*fmt){
default:
return -1;
case 's':
e->arg[i++] = mks(va_arg(a, char*));
break;
case 'i':
e->arg[i++] = mki(va_arg(a, int));
break;
case 'I':
e->arg[i++] = mki(va_arg(a, uvlong));
break;
case 'b':
case 'p':
case '*':
e->arg[i++] = va_arg(a, void*);
break;
}
}
r = va_arg(a, void**);
va_end(a);
if(dot = deref(dot))
if(TAG(dot) == 'm'){
m = dot;
if(i != m->narg)
return -1;
if(m->eval == nil)
return xec(m->start, m->end, forkname(m->name), e, r);
FP = FB;
FP->op = nil;
FP->env = e;
FP->narg = 0;
FP->dot = m->name;
FP->ref = FP->aux = nil;
dot = (*m->eval)();
}
if(r != nil)
*r = dot;
return 0;
}
void
amltake(void *p)
{
if(p != nil)
D2H(p)->mark |= 2;
}
void
amldrop(void *p)
{
if(p != nil)
D2H(p)->mark &= ~2;
}