ref: 8188b4f4f0e07b6669e6ae3c6c1099af917eaab4
dir: /sys/src/libmach/qdb.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include <mach.h>
/*
* PowerPC-specific debugger interface,
* including 64-bit modes
* forsyth@terzarima.net
*/
static char *powerexcep(Map*, Rgetter);
static int powerfoll(Map*, uvlong, Rgetter, uvlong*);
static int powerinst(Map*, uvlong, char, char*, int);
static int powerinstlen(Map*, uvlong);
static int powerdas(Map*, uvlong, char*, int);
/*
* Machine description
*/
Machdata powermach =
{
{0x02, 0x8f, 0xff, 0xff}, /* break point */ /* BUG */
4, /* break point size */
beswab, /* short to local byte order */
beswal, /* long to local byte order */
beswav, /* vlong to local byte order */
risctrace, /* print C traceback */
riscframe, /* frame finder */
powerexcep, /* print exception */
0, /* breakpoint fixup */
beieeesftos, /* single precision float printer */
beieeedftos, /* double precisioin float printer */
powerfoll, /* following addresses */
powerinst, /* print instruction */
powerdas, /* dissembler */
powerinstlen, /* instruction size */
};
static char *excname[] =
{
"reserved 0",
"system reset",
"machine check",
"data access",
"instruction access",
"external interrupt",
"alignment",
"program exception",
"floating-point unavailable",
"decrementer",
"i/o controller interface error",
"reserved B",
"system call",
"trace trap",
"floating point assist",
"reserved",
"ITLB miss",
"DTLB load miss",
"DTLB store miss",
"instruction address breakpoint"
"SMI interrupt"
"reserved 15",
"reserved 16",
"reserved 17",
"reserved 18",
"reserved 19",
"reserved 1A",
/* the following are made up on a program exception */
"floating point exception", /* FPEXC */
"illegal instruction",
"privileged instruction",
"trap",
"illegal operation",
};
static char*
powerexcep(Map *map, Rgetter rget)
{
long c;
static char buf[32];
c = (*rget)(map, "CAUSE") >> 8;
if(c < nelem(excname))
return excname[c];
sprint(buf, "unknown trap #%lx", c);
return buf;
}
/*
* disassemble PowerPC opcodes
*/
#define REGSP 1 /* should come from q.out.h, but there's a clash */
#define REGSB 2
static char FRAMENAME[] = ".frame";
static Map *mymap;
/*
* ibm conventions for these: bit 0 is top bit
* from table 10-1
*/
typedef struct {
uchar aa; /* bit 30 */
uchar crba; /* bits 11-15 */
uchar crbb; /* bits 16-20 */
long bd; /* bits 16-29 */
uchar crfd; /* bits 6-8 */
uchar crfs; /* bits 11-13 */
uchar bi; /* bits 11-15 */
uchar bo; /* bits 6-10 */
uchar crbd; /* bits 6-10 */
union {
short d; /* bits 16-31 */
short simm;
ushort uimm;
};
uchar fm; /* bits 7-14 */
uchar fra; /* bits 11-15 */
uchar frb; /* bits 16-20 */
uchar frc; /* bits 21-25 */
uchar frs; /* bits 6-10 */
uchar frd; /* bits 6-10 */
uchar crm; /* bits 12-19 */
long li; /* bits 6-29 || b'00' */
uchar lk; /* bit 31 */
uchar mb; /* bits 21-25 */
uchar me; /* bits 26-30 */
uchar xmbe; /* bits 26,21-25: mb[5] || mb[0:4], also xme */
uchar xsh; /* bits 30,16-20: sh[5] || sh[0:4] */
uchar nb; /* bits 16-20 */
uchar op; /* bits 0-5 */
uchar oe; /* bit 21 */
uchar ra; /* bits 11-15 */
uchar rb; /* bits 16-20 */
uchar rc; /* bit 31 */
union {
uchar rs; /* bits 6-10 */
uchar rd;
};
uchar sh; /* bits 16-20 */
ushort spr; /* bits 11-20 */
uchar to; /* bits 6-10 */
uchar imm; /* bits 16-19 */
ushort xo; /* bits 21-30, 22-30, 26-30, or 30 (beware) */
uvlong imm64;
long w0;
long w1;
uvlong addr; /* pc of instruction */
short target;
short m64; /* 64-bit mode */
char *curr; /* current fill level in output buffer */
char *end; /* end of buffer */
int size; /* number of longs in instr */
char *err; /* errmsg */
} Instr;
#define IBF(v,a,b) (((ulong)(v)>>(32-(b)-1)) & ~(~0L<<(((b)-(a)+1))))
#define IB(v,b) IBF((v),(b),(b))
#pragma varargck argpos bprint 2
static void
bprint(Instr *i, char *fmt, ...)
{
va_list arg;
va_start(arg, fmt);
i->curr = vseprint(i->curr, i->end, fmt, arg);
va_end(arg);
}
static int
decode(uvlong pc, Instr *i)
{
ulong w;
if (get4(mymap, pc, &w) < 0) {
werrstr("can't read instruction: %r");
return -1;
}
i->m64 = asstype == APOWER64;
i->aa = IB(w, 30);
i->crba = IBF(w, 11, 15);
i->crbb = IBF(w, 16, 20);
i->bd = IBF(w, 16, 29)<<2;
if(i->bd & 0x8000)
i->bd |= ~0L<<16;
i->crfd = IBF(w, 6, 8);
i->crfs = IBF(w, 11, 13);
i->bi = IBF(w, 11, 15);
i->bo = IBF(w, 6, 10);
i->crbd = IBF(w, 6, 10);
i->uimm = IBF(w, 16, 31); /* also d, simm */
i->fm = IBF(w, 7, 14);
i->fra = IBF(w, 11, 15);
i->frb = IBF(w, 16, 20);
i->frc = IBF(w, 21, 25);
i->frs = IBF(w, 6, 10);
i->frd = IBF(w, 6, 10);
i->crm = IBF(w, 12, 19);
i->li = IBF(w, 6, 29)<<2;
if(IB(w, 6))
i->li |= ~0<<25;
i->lk = IB(w, 31);
i->mb = IBF(w, 21, 25);
i->me = IBF(w, 26, 30);
i->xmbe = (IB(w,26)<<5) | i->mb;
i->nb = IBF(w, 16, 20);
i->op = IBF(w, 0, 5);
i->oe = IB(w, 21);
i->ra = IBF(w, 11, 15);
i->rb = IBF(w, 16, 20);
i->rc = IB(w, 31);
i->rs = IBF(w, 6, 10); /* also rd */
i->sh = IBF(w, 16, 20);
i->xsh = (IB(w, 30)<<5) | i->sh;
i->spr = IBF(w, 11, 20);
i->to = IBF(w, 6, 10);
i->imm = IBF(w, 16, 19);
i->xo = IBF(w, 21, 30); /* bits 21-30, 22-30, 26-30, or 30 (beware) */
if(i->op == 58){ /* class of 64-bit loads */
i->xo = i->simm & 3;
i->simm &= ~3;
}
i->imm64 = i->simm;
if(i->op == 15)
i->imm64 <<= 16;
else if(i->op == 25 || i->op == 27 || i->op == 29)
i->imm64 = (uvlong)(i->uimm<<16);
i->w0 = w;
i->target = -1;
i->addr = pc;
i->size = 1;
return 1;
}
static int
mkinstr(uvlong pc, Instr *i)
{
Instr x;
if(decode(pc, i) < 0)
return -1;
/*
* combine ADDIS/ORI (CAU/ORIL) into MOVW
* also ORIS/ORIL for unsigned in 64-bit mode
*/
if ((i->op == 15 || i->op == 25) && i->ra==0) {
if(decode(pc+4, &x) < 0)
return -1;
if (x.op == 24 && x.rs == x.ra && x.ra == i->rd) {
i->imm64 |= (x.imm64 & 0xFFFF);
if(i->op != 15)
i->imm64 &= 0xFFFFFFFFUL;
i->w1 = x.w0;
i->target = x.rd;
i->size++;
return 1;
}
}
return 1;
}
static int
plocal(Instr *i)
{
long offset;
Symbol s;
if (!findsym(i->addr, CTEXT, &s) || !findlocal(&s, FRAMENAME, &s))
return -1;
offset = s.value - i->imm64;
if (offset > 0) {
if(getauto(&s, offset, CAUTO, &s)) {
bprint(i, "%s+%lld(SP)", s.name, s.value);
return 1;
}
} else {
if (getauto(&s, -offset-4, CPARAM, &s)) {
bprint(i, "%s+%ld(FP)", s.name, -offset);
return 1;
}
}
return -1;
}
static int
pglobal(Instr *i, uvlong off, int anyoff, char *reg)
{
Symbol s, s2;
uvlong off1;
if(findsym(off, CANY, &s) &&
off-s.value < 4096 &&
(s.class == CDATA || s.class == CTEXT)) {
if(off==s.value && s.name[0]=='$'){
off1 = 0;
geta(mymap, s.value, &off1);
if(off1 && findsym(off1, CANY, &s2) && s2.value == off1){
bprint(i, "$%s%s", s2.name, reg);
return 1;
}
}
bprint(i, "%s", s.name);
if (s.value != off)
bprint(i, "+%llux", off-s.value);
bprint(i, reg);
return 1;
}
if(!anyoff)
return 0;
bprint(i, "%llux%s", off, reg);
return 1;
}
static void
address(Instr *i)
{
if (i->ra == REGSP && plocal(i) >= 0)
return;
if (i->ra == REGSB && mach->sb && pglobal(i, mach->sb+i->imm64, 0, "(SB)"))
return;
if(i->simm < 0)
bprint(i, "-%x(R%d)", -i->simm, i->ra);
else
bprint(i, "%llux(R%d)", i->imm64, i->ra);
}
static char *tcrbits[] = {"LT", "GT", "EQ", "VS"};
static char *fcrbits[] = {"GE", "LE", "NE", "VC"};
typedef struct Opcode Opcode;
struct Opcode {
uchar op;
ushort xo;
ushort xomask;
char *mnemonic;
void (*f)(Opcode *, Instr *);
char *ken;
int flags;
};
static void format(char *, Instr *, char *);
static void
branch(Opcode *o, Instr *i)
{
char buf[8];
int bo, bi;
bo = i->bo & ~1; /* ignore prediction bit */
if(bo==4 || bo==12 || bo==20) { /* simple forms */
if(bo != 20) {
bi = i->bi&3;
sprint(buf, "B%s%%L", bo==12? tcrbits[bi]: fcrbits[bi]);
format(buf, i, nil);
bprint(i, "\t");
if(i->bi > 4)
bprint(i, "CR(%d),", i->bi/4);
} else
format("BR%L\t", i, nil);
if(i->op == 16)
format(0, i, "%J");
else if(i->op == 19 && i->xo == 528)
format(0, i, "(CTR)");
else if(i->op == 19 && i->xo == 16)
format(0, i, "(LR)");
} else
format(o->mnemonic, i, o->ken);
}
static void
addi(Opcode *o, Instr *i)
{
if (i->op==14 && i->ra == 0)
format("MOVW", i, "%i,R%d");
else if (i->ra == REGSB) {
bprint(i, "MOVW\t$");
address(i);
bprint(i, ",R%d", i->rd);
} else if(i->op==14 && i->simm < 0) {
bprint(i, "SUB\t$%d,R%d", -i->simm, i->ra);
if(i->rd != i->ra)
bprint(i, ",R%d", i->rd);
} else if(i->ra == i->rd) {
format(o->mnemonic, i, "%i");
bprint(i, ",R%d", i->rd);
} else
format(o->mnemonic, i, o->ken);
}
static void
addis(Opcode *o, Instr *i)
{
long v;
v = i->imm64;
if (i->op==15 && i->ra == 0)
bprint(i, "MOVW\t$%lux,R%d", v, i->rd);
else if (i->op==15 && i->ra == REGSB) {
bprint(i, "MOVW\t$");
address(i);
bprint(i, ",R%d", i->rd);
} else if(i->op==15 && v < 0) {
bprint(i, "SUB\t$%ld,R%d", -v, i->ra);
if(i->rd != i->ra)
bprint(i, ",R%d", i->rd);
} else {
format(o->mnemonic, i, nil);
bprint(i, "\t$%ld,R%d", v, i->ra);
if(i->rd != i->ra)
bprint(i, ",R%d", i->rd);
}
}
static void
andi(Opcode *o, Instr *i)
{
if (i->ra == i->rs)
format(o->mnemonic, i, "%I,R%d");
else
format(o->mnemonic, i, o->ken);
}
static void
gencc(Opcode *o, Instr *i)
{
format(o->mnemonic, i, o->ken);
}
static void
gen(Opcode *o, Instr *i)
{
format(o->mnemonic, i, o->ken);
if (i->rc)
bprint(i, " [illegal Rc]");
}
static void
ldx(Opcode *o, Instr *i)
{
if(i->ra == 0)
format(o->mnemonic, i, "(R%b),R%d");
else
format(o->mnemonic, i, "(R%b+R%a),R%d");
if(i->rc)
bprint(i, " [illegal Rc]");
}
static void
stx(Opcode *o, Instr *i)
{
if(i->ra == 0)
format(o->mnemonic, i, "R%d,(R%b)");
else
format(o->mnemonic, i, "R%d,(R%b+R%a)");
if(i->rc && i->xo != 150)
bprint(i, " [illegal Rc]");
}
static void
fldx(Opcode *o, Instr *i)
{
if(i->ra == 0)
format(o->mnemonic, i, "(R%b),F%d");
else
format(o->mnemonic, i, "(R%b+R%a),F%d");
if(i->rc)
bprint(i, " [illegal Rc]");
}
static void
fstx(Opcode *o, Instr *i)
{
if(i->ra == 0)
format(o->mnemonic, i, "F%d,(R%b)");
else
format(o->mnemonic, i, "F%d,(R%b+R%a)");
if(i->rc)
bprint(i, " [illegal Rc]");
}
static void
dcb(Opcode *o, Instr *i)
{
if(i->ra == 0)
format(o->mnemonic, i, "(R%b)");
else
format(o->mnemonic, i, "(R%b+R%a)");
if(i->rd)
bprint(i, " [illegal Rd]");
if(i->rc)
bprint(i, " [illegal Rc]");
}
static void
lw(Opcode *o, Instr *i, char r)
{
format(o->mnemonic, i, nil);
bprint(i, "\t");
address(i);
bprint(i, ",%c%d", r, i->rd);
}
static void
load(Opcode *o, Instr *i)
{
lw(o, i, 'R');
}
static void
fload(Opcode *o, Instr *i)
{
lw(o, i, 'F');
}
static void
sw(Opcode *o, Instr *i, char r)
{
int offset;
Symbol s;
if (i->rs == REGSP) {
if (findsym(i->addr, CTEXT, &s) && findlocal(&s, FRAMENAME, &s)) {
offset = s.value-i->imm64;
if (offset > 0 && getauto(&s, offset, CAUTO, &s)) {
format(o->mnemonic, i, nil);
bprint(i, "\t%c%d,%s-%d(SP)", r, i->rd, s.name, offset);
return;
}
}
}
if (i->rs == REGSB && mach->sb) {
format(o->mnemonic, i, nil);
bprint(i, "\t%c%d,", r, i->rd);
address(i);
return;
}
if (r == 'F')
format(o->mnemonic, i, "F%d,%l");
else
format(o->mnemonic, i, o->ken);
}
static void
store(Opcode *o, Instr *i)
{
sw(o, i, 'R');
}
static void
fstore(Opcode *o, Instr *i)
{
sw(o, i, 'F');
}
static void
shifti(Opcode *o, Instr *i)
{
if (i->ra == i->rs)
format(o->mnemonic, i, "$%k,R%a");
else
format(o->mnemonic, i, o->ken);
}
static void
shift(Opcode *o, Instr *i)
{
if (i->ra == i->rs)
format(o->mnemonic, i, "R%b,R%a");
else
format(o->mnemonic, i, o->ken);
}
static void
add(Opcode *o, Instr *i)
{
if (i->rd == i->ra)
format(o->mnemonic, i, "R%b,R%d");
else if (i->rd == i->rb)
format(o->mnemonic, i, "R%a,R%d");
else
format(o->mnemonic, i, o->ken);
}
static void
sub(Opcode *o, Instr *i)
{
format(o->mnemonic, i, nil);
bprint(i, "\t");
if(i->op == 31) {
bprint(i, "\tR%d,R%d", i->ra, i->rb); /* subtract Ra from Rb */
if(i->rd != i->rb)
bprint(i, ",R%d", i->rd);
} else
bprint(i, "\tR%d,$%d,R%d", i->ra, i->simm, i->rd);
}
static void
qdiv(Opcode *o, Instr *i)
{
format(o->mnemonic, i, nil);
if(i->op == 31)
bprint(i, "\tR%d,R%d", i->rb, i->ra);
else
bprint(i, "\t$%d,R%d", i->simm, i->ra);
if(i->ra != i->rd)
bprint(i, ",R%d", i->rd);
}
static void
and(Opcode *o, Instr *i)
{
if (i->op == 31) {
/* Rb,Rs,Ra */
if (i->ra == i->rs)
format(o->mnemonic, i, "R%b,R%a");
else if (i->ra == i->rb)
format(o->mnemonic, i, "R%s,R%a");
else
format(o->mnemonic, i, o->ken);
} else {
/* imm,Rs,Ra */
if (i->ra == i->rs)
format(o->mnemonic, i, "%I,R%a");
else
format(o->mnemonic, i, o->ken);
}
}
static void
or(Opcode *o, Instr *i)
{
if (i->op == 31) {
/* Rb,Rs,Ra */
if (i->rs == 0 && i->ra == 0 && i->rb == 0)
format("NOP", i, nil);
else if (i->rs == i->rb)
format("MOVW", i, "R%b,R%a");
else
and(o, i);
} else
and(o, i);
}
static void
shifted(Opcode *o, Instr *i)
{
format(o->mnemonic, i, nil);
bprint(i, "\t$%lux,", (ulong)i->uimm<<16);
if (i->rs == i->ra)
bprint(i, "R%d", i->ra);
else
bprint(i, "R%d,R%d", i->rs, i->ra);
}
static void
neg(Opcode *o, Instr *i)
{
if (i->rd == i->ra)
format(o->mnemonic, i, "R%d");
else
format(o->mnemonic, i, o->ken);
}
static char ir2[] = "R%a,R%d"; /* reverse of IBM order */
static char ir3[] = "R%b,R%a,R%d";
static char ir3r[] = "R%a,R%b,R%d";
static char il3[] = "R%b,R%s,R%a";
static char il2u[] = "%I,R%d,R%a";
static char il3s[] = "$%k,R%s,R%a";
static char il2[] = "R%s,R%a";
static char icmp3[] = "R%a,R%b,%D";
static char cr3op[] = "%b,%a,%d";
static char ir2i[] = "%i,R%a,R%d";
static char fp2[] = "F%b,F%d";
static char fp3[] = "F%b,F%a,F%d";
static char fp3c[] = "F%c,F%a,F%d";
static char fp4[] = "F%a,F%c,F%b,F%d";
static char fpcmp[] = "F%a,F%b,%D";
static char ldop[] = "%l,R%d";
static char stop[] = "R%d,%l";
static char fldop[] = "%l,F%d";
static char fstop[] = "F%d,%l";
static char rldc[] = "R%b,R%s,$%E,R%a";
static char rlim[] = "R%b,R%s,$%z,R%a";
static char rlimi[] = "$%k,R%s,$%z,R%a";
static char rldi[] = "$%e,R%s,$%E,R%a";
#define OEM IBF(~0,22,30)
#define FP4 IBF(~0,26,30)
#define ALL (~0)
#define RLDC 0xF
#define RLDI 0xE
/*
notes:
10-26: crfD = rD>>2; rD&3 mbz
also, L bit (bit 10) mbz or selects 64-bit operands
*/
static Opcode opcodes[] = {
{31, 266, OEM, "ADD%V%C", add, ir3},
{31, 10, OEM, "ADDC%V%C", add, ir3},
{31, 138, OEM, "ADDE%V%C", add, ir3},
{14, 0, 0, "ADD", addi, ir2i},
{12, 0, 0, "ADDC", addi, ir2i},
{13, 0, 0, "ADDCCC", addi, ir2i},
{15, 0, 0, "ADD", addis, 0},
{31, 234, OEM, "ADDME%V%C", gencc, ir2},
{31, 202, OEM, "ADDZE%V%C", gencc, ir2},
{31, 28, ALL, "AND%C", and, il3},
{31, 60, ALL, "ANDN%C", and, il3},
{28, 0, 0, "ANDCC", andi, il2u},
{29, 0, 0, "ANDCC", shifted, 0},
{18, 0, 0, "B%L", gencc, "%j"},
{16, 0, 0, "BC%L", branch, "%d,%a,%J"},
{19, 528, ALL, "BC%L", branch, "%d,%a,(CTR)"},
{19, 16, ALL, "BC%L", branch, "%d,%a,(LR)"},
{31, 0, ALL, "CMP", 0, icmp3},
{11, 0, 0, "CMP", 0, "R%a,%i,%D"},
{31, 32, ALL, "CMPU", 0, icmp3},
{10, 0, 0, "CMPU", 0, "R%a,%I,%D"},
{31, 58, ALL, "CNTLZD%C", gencc, ir2}, /* 64 */
{31, 26, ALL, "CNTLZ%W%C", gencc, ir2},
{19, 257, ALL, "CRAND", gen, cr3op},
{19, 129, ALL, "CRANDN", gen, cr3op},
{19, 289, ALL, "CREQV", gen, cr3op},
{19, 225, ALL, "CRNAND", gen, cr3op},
{19, 33, ALL, "CRNOR", gen, cr3op},
{19, 449, ALL, "CROR", gen, cr3op},
{19, 417, ALL, "CRORN", gen, cr3op},
{19, 193, ALL, "CRXOR", gen, cr3op},
{31, 86, ALL, "DCBF", dcb, 0},
{31, 470, ALL, "DCBI", dcb, 0},
{31, 54, ALL, "DCBST", dcb, 0},
{31, 278, ALL, "DCBT", dcb, 0},
{31, 246, ALL, "DCBTST", dcb, 0},
{31, 1014, ALL, "DCBZ", dcb, 0},
{31, 454, ALL, "DCCCI", dcb, 0},
{31, 966, ALL, "ICCCI", dcb, 0},
{31, 489, OEM, "DIVD%V%C", qdiv, ir3}, /* 64 */
{31, 457, OEM, "DIVDU%V%C", qdiv, ir3}, /* 64 */
{31, 491, OEM, "DIVW%V%C", qdiv, ir3},
{31, 459, OEM, "DIVWU%V%C", qdiv, ir3},
{31, 310, ALL, "ECIWX", ldx, 0},
{31, 438, ALL, "ECOWX", stx, 0},
{31, 854, ALL, "EIEIO", gen, 0},
{31, 284, ALL, "EQV%C", gencc, il3},
{31, 954, ALL, "EXTSB%C", gencc, il2},
{31, 922, ALL, "EXTSH%C", gencc, il2},
{31, 986, ALL, "EXTSW%C", gencc, il2}, /* 64 */
{63, 264, ALL, "FABS%C", gencc, fp2},
{63, 21, ALL, "FADD%C", gencc, fp3},
{59, 21, ALL, "FADDS%C", gencc, fp3},
{63, 32, ALL, "FCMPO", gen, fpcmp},
{63, 0, ALL, "FCMPU", gen, fpcmp},
{63, 846, ALL, "FCFID%C", gencc, fp2}, /* 64 */
{63, 814, ALL, "FCTID%C", gencc, fp2}, /* 64 */
{63, 815, ALL, "FCTIDZ%C", gencc, fp2}, /* 64 */
{63, 14, ALL, "FCTIW%C", gencc, fp2},
{63, 15, ALL, "FCTIWZ%C", gencc, fp2},
{63, 18, ALL, "FDIV%C", gencc, fp3},
{59, 18, ALL, "FDIVS%C", gencc, fp3},
{63, 29, FP4, "FMADD%C", gencc, fp4},
{59, 29, FP4, "FMADDS%C", gencc, fp4},
{63, 72, ALL, "FMOVD%C", gencc, fp2},
{63, 28, FP4, "FMSUB%C", gencc, fp4},
{59, 28, FP4, "FMSUBS%C", gencc, fp4},
{63, 25, FP4, "FMUL%C", gencc, fp3c},
{59, 25, FP4, "FMULS%C", gencc, fp3c},
{63, 136, ALL, "FNABS%C", gencc, fp2},
{63, 40, ALL, "FNEG%C", gencc, fp2},
{63, 31, FP4, "FNMADD%C", gencc, fp4},
{59, 31, FP4, "FNMADDS%C", gencc, fp4},
{63, 30, FP4, "FNMSUB%C", gencc, fp4},
{59, 30, FP4, "FNMSUBS%C", gencc, fp4},
{59, 24, ALL, "FRES%C", gencc, fp2}, /* optional */
{63, 12, ALL, "FRSP%C", gencc, fp2},
{63, 26, ALL, "FRSQRTE%C", gencc, fp2}, /* optional */
{63, 23, FP4, "FSEL%CC", gencc, fp4}, /* optional */
{63, 22, ALL, "FSQRT%C", gencc, fp2}, /* optional */
{59, 22, ALL, "FSQRTS%C", gencc, fp2}, /* optional */
{63, 20, FP4, "FSUB%C", gencc, fp3},
{59, 20, FP4, "FSUBS%C", gencc, fp3},
{31, 982, ALL, "ICBI", dcb, 0}, /* optional */
{19, 150, ALL, "ISYNC", gen, 0},
{34, 0, 0, "MOVBZ", load, ldop},
{35, 0, 0, "MOVBZU", load, ldop},
{31, 119, ALL, "MOVBZU", ldx, 0},
{31, 87, ALL, "MOVBZ", ldx, 0},
{50, 0, 0, "FMOVD", fload, fldop},
{51, 0, 0, "FMOVDU", fload, fldop},
{31, 631, ALL, "FMOVDU", fldx, 0},
{31, 599, ALL, "FMOVD", fldx, 0},
{48, 0, 0, "FMOVS", load, fldop},
{49, 0, 0, "FMOVSU", load, fldop},
{31, 567, ALL, "FMOVSU", fldx, 0},
{31, 535, ALL, "FMOVS", fldx, 0},
{42, 0, 0, "MOVH", load, ldop},
{43, 0, 0, "MOVHU", load, ldop},
{31, 375, ALL, "MOVHU", ldx, 0},
{31, 343, ALL, "MOVH", ldx, 0},
{31, 790, ALL, "MOVHBR", ldx, 0},
{40, 0, 0, "MOVHZ", load, ldop},
{41, 0, 0, "MOVHZU", load, ldop},
{31, 311, ALL, "MOVHZU", ldx, 0},
{31, 279, ALL, "MOVHZ", ldx, 0},
{46, 0, 0, "MOVMW", load, ldop},
{31, 597, ALL, "LSW", gen, "(R%a),$%n,R%d"},
{31, 533, ALL, "LSW", ldx, 0},
{31, 20, ALL, "LWAR", ldx, 0},
{31, 84, ALL, "LWARD", ldx, 0}, /* 64 */
{58, 0, ALL, "MOVD", load, ldop}, /* 64 */
{58, 1, ALL, "MOVDU", load, ldop}, /* 64 */
{31, 53, ALL, "MOVDU", ldx, 0}, /* 64 */
{31, 21, ALL, "MOVD", ldx, 0}, /* 64 */
{31, 534, ALL, "MOVWBR", ldx, 0},
{58, 2, ALL, "MOVW", load, ldop}, /* 64 (lwa) */
{31, 373, ALL, "MOVWU", ldx, 0}, /* 64 */
{31, 341, ALL, "MOVW", ldx, 0}, /* 64 */
{32, 0, 0, "MOVW%Z", load, ldop},
{33, 0, 0, "MOVW%ZU", load, ldop},
{31, 55, ALL, "MOVW%ZU", ldx, 0},
{31, 23, ALL, "MOVW%Z", ldx, 0},
{19, 0, ALL, "MOVFL", gen, "%S,%D"},
{63, 64, ALL, "MOVCRFS", gen, "%S,%D"},
{31, 512, ALL, "MOVW", gen, "XER,%D"},
{31, 19, ALL, "MOVW", gen, "CR,R%d"},
{63, 583, ALL, "MOVW%C", gen, "FPSCR, F%d"}, /* mffs */
{31, 83, ALL, "MOVW", gen, "MSR,R%d"},
{31, 339, ALL, "MOVW", gen, "%P,R%d"},
{31, 595, ALL, "MOVW", gen, "SEG(%a),R%d"},
{31, 659, ALL, "MOVW", gen, "SEG(R%b),R%d"},
{31, 323, ALL, "MOVW", gen, "DCR(%Q),R%d"},
{31, 451, ALL, "MOVW", gen, "R%s,DCR(%Q)"},
{31, 259, ALL, "MOVW", gen, "DCR(R%a),R%d"},
{31, 387, ALL, "MOVW", gen, "R%s,DCR(R%a)"},
{31, 144, ALL, "MOVFL", gen, "R%s,%m,CR"},
{63, 70, ALL, "MTFSB0%C", gencc, "%D"},
{63, 38, ALL, "MTFSB1%C", gencc, "%D"},
{63, 711, ALL, "MOVFL%C", gencc, "F%b,%M,FPSCR"}, /* mtfsf */
{63, 134, ALL, "MOVFL%C", gencc, "%K,%D"},
{31, 146, ALL, "MOVW", gen, "R%s,MSR"},
{31, 178, ALL, "MOVD", gen, "R%s,MSR"},
{31, 467, ALL, "MOVW", gen, "R%s,%P"},
{31, 210, ALL, "MOVW", gen, "R%s,SEG(%a)"},
{31, 242, ALL, "MOVW", gen, "R%s,SEG(R%b)"},
{31, 73, ALL, "MULHD%C", gencc, ir3},
{31, 9, ALL, "MULHDU%C", gencc, ir3},
{31, 233, OEM, "MULLD%V%C", gencc, ir3},
{31, 75, ALL, "MULHW%C", gencc, ir3},
{31, 11, ALL, "MULHWU%C", gencc, ir3},
{31, 235, OEM, "MULLW%V%C", gencc, ir3},
{7, 0, 0, "MULLW", qdiv, "%i,R%a,R%d"},
{31, 476, ALL, "NAND%C", gencc, il3},
{31, 104, OEM, "NEG%V%C", neg, ir2},
{31, 124, ALL, "NOR%C", gencc, il3},
{31, 444, ALL, "OR%C", or, il3},
{31, 412, ALL, "ORN%C", or, il3},
{24, 0, 0, "OR", and, "%I,R%d,R%a"},
{25, 0, 0, "OR", shifted, 0},
{19, 50, ALL, "RFI", gen, 0},
{19, 51, ALL, "RFCI", gen, 0},
{30, 8, RLDC, "RLDCL%C", gencc, rldc}, /* 64 */
{30, 9, RLDC, "RLDCR%C", gencc, rldc}, /* 64 */
{30, 0, RLDI, "RLDCL%C", gencc, rldi}, /* 64 */
{30, 1<<1, RLDI, "RLDCR%C", gencc, rldi}, /* 64 */
{30, 2<<1, RLDI, "RLDC%C", gencc, rldi}, /* 64 */
{30, 3<<1, RLDI, "RLDMI%C", gencc, rldi}, /* 64 */
{20, 0, 0, "RLWMI%C", gencc, rlimi},
{21, 0, 0, "RLWNM%C", gencc, rlimi},
{23, 0, 0, "RLWNM%C", gencc, rlim},
{17, 1, ALL, "SYSCALL", gen, 0},
{31, 27, ALL, "SLD%C", shift, il3}, /* 64 */
{31, 24, ALL, "SLW%C", shift, il3},
{31, 794, ALL, "SRAD%C", shift, il3}, /* 64 */
{31, (413<<1)|0, ALL, "SRAD%C", shifti, il3s}, /* 64 */
{31, (413<<1)|1, ALL, "SRAD%C", shifti, il3s}, /* 64 */
{31, 792, ALL, "SRAW%C", shift, il3},
{31, 824, ALL, "SRAW%C", shifti, il3s},
{31, 539, ALL, "SRD%C", shift, il3}, /* 64 */
{31, 536, ALL, "SRW%C", shift, il3},
{38, 0, 0, "MOVB", store, stop},
{39, 0, 0, "MOVBU", store, stop},
{31, 247, ALL, "MOVBU", stx, 0},
{31, 215, ALL, "MOVB", stx, 0},
{54, 0, 0, "FMOVD", fstore, fstop},
{55, 0, 0, "FMOVDU", fstore, fstop},
{31, 759, ALL, "FMOVDU", fstx, 0},
{31, 727, ALL, "FMOVD", fstx, 0},
{52, 0, 0, "FMOVS", fstore, fstop},
{53, 0, 0, "FMOVSU", fstore, fstop},
{31, 695, ALL, "FMOVSU", fstx, 0},
{31, 663, ALL, "FMOVS", fstx, 0},
{44, 0, 0, "MOVH", store, stop},
{31, 918, ALL, "MOVHBR", stx, 0},
{45, 0, 0, "MOVHU", store, stop},
{31, 439, ALL, "MOVHU", stx, 0},
{31, 407, ALL, "MOVH", stx, 0},
{47, 0, 0, "MOVMW", store, stop},
{31, 725, ALL, "STSW", gen, "R%d,$%n,(R%a)"},
{31, 661, ALL, "STSW", stx, 0},
{36, 0, 0, "MOVW", store, stop},
{31, 662, ALL, "MOVWBR", stx, 0},
{31, 150, ALL, "STWCCC", stx, 0},
{31, 214, ALL, "STDCCC", stx, 0}, /* 64 */
{37, 0, 0, "MOVWU", store, stop},
{31, 183, ALL, "MOVWU", stx, 0},
{31, 151, ALL, "MOVW", stx, 0},
{62, 0, 0, "MOVD%U", store, stop}, /* 64 */
{31, 149, ALL, "MOVD", stx, 0,}, /* 64 */
{31, 181, ALL, "MOVDU", stx, 0}, /* 64 */
{31, 498, ALL, "SLBIA", gen, 0}, /* 64 */
{31, 434, ALL, "SLBIE", gen, "R%b"}, /* 64 */
{31, 466, ALL, "SLBIEX", gen, "R%b"}, /* 64 */
{31, 915, ALL, "SLBMFEE", gen, "R%b,R%d"}, /* 64 */
{31, 851, ALL, "SLBMFEV", gen, "R%b,R%d"}, /* 64 */
{31, 402, ALL, "SLBMTE", gen, "R%s,R%b"}, /* 64 */
{31, 40, OEM, "SUB%V%C", sub, ir3},
{31, 8, OEM, "SUBC%V%C", sub, ir3},
{31, 136, OEM, "SUBE%V%C", sub, ir3},
{8, 0, 0, "SUBC", gen, "R%a,%i,R%d"},
{31, 232, OEM, "SUBME%V%C", sub, ir2},
{31, 200, OEM, "SUBZE%V%C", sub, ir2},
{31, 598, ALL, "SYNC", gen, 0}, /* TO DO: there's a parameter buried in there */
{2, 0, 0, "TD", gen, "%d,R%a,%i"}, /* 64 */
{31, 370, ALL, "TLBIA", gen, 0}, /* optional */
{31, 306, ALL, "TLBIE", gen, "R%b"}, /* optional */
{31, 274, ALL, "TLBIEL", gen, "R%b"}, /* optional */
{31, 1010, ALL, "TLBLI", gen, "R%b"}, /* optional */
{31, 978, ALL, "TLBLD", gen, "R%b"}, /* optional */
{31, 566, ALL, "TLBSYNC", gen, 0}, /* optional */
{31, 68, ALL, "TD", gen, "%d,R%a,R%b"}, /* 64 */
{31, 4, ALL, "TW", gen, "%d,R%a,R%b"},
{3, 0, 0, "TW", gen, "%d,R%a,%i"},
{31, 316, ALL, "XOR", and, il3},
{26, 0, 0, "XOR", and, il2u},
{27, 0, 0, "XOR", shifted, 0},
{0},
};
typedef struct Spr Spr;
struct Spr {
int n;
char *name;
};
static Spr sprname[] = {
{0, "MQ"},
{1, "XER"},
{268, "TBL"},
{269, "TBU"},
{8, "LR"},
{9, "CTR"},
{528, "IBAT0U"},
{529, "IBAT0L"},
{530, "IBAT1U"},
{531, "IBAT1L"},
{532, "IBAT2U"},
{533, "IBAT2L"},
{534, "IBAT3U"},
{535, "IBAT3L"},
{536, "DBAT0U"},
{537, "DBAT0L"},
{538, "DBAT1U"},
{539, "DBAT1L"},
{540, "DBAT2U"},
{541, "DBAT2L"},
{542, "DBAT3U"},
{543, "DBAT3L"},
{25, "SDR1"},
{19, "DAR"},
{272, "SPRG0"},
{273, "SPRG1"},
{274, "SPRG2"},
{275, "SPRG3"},
{18, "DSISR"},
{26, "SRR0"},
{27, "SRR1"},
{284, "TBLW"},
{285, "TBUW"},
{22, "DEC"},
{282, "EAR"},
{1008, "HID0"},
{1009, "HID1"},
{976, "DMISS"},
{977, "DCMP"},
{978, "HASH1"},
{979, "HASH2"},
{980, "IMISS"},
{981, "ICMP"},
{982, "RPA"},
{1010, "IABR"},
{1013, "DABR"},
{0,0},
};
static int
shmask(uvlong *m)
{
int i;
for(i=0; i<63; i++)
if(*m & ((uvlong)1<<i))
break;
if(i > 63)
return 0;
if(*m & ~((uvlong)1<<i)){ /* more than one bit: do multiples of bytes */
i = (i/8)*8;
if(i == 0)
return 0;
}
*m >>= i;
return i;
}
static void
format(char *mnemonic, Instr *i, char *f)
{
int n, s;
ulong mask;
uvlong vmask;
if (mnemonic)
format(0, i, mnemonic);
if (f == 0)
return;
if (mnemonic)
bprint(i, "\t");
for ( ; *f; f++) {
if (*f != '%') {
bprint(i, "%c", *f);
continue;
}
switch (*++f) {
case 'a':
bprint(i, "%d", i->ra);
break;
case 'b':
bprint(i, "%d", i->rb);
break;
case 'c':
bprint(i, "%d", i->frc);
break;
case 'd':
case 's':
bprint(i, "%d", i->rd);
break;
case 'C':
if(i->rc)
bprint(i, "CC");
break;
case 'D':
if(i->rd & 3)
bprint(i, "CR(INVAL:%d)", i->rd);
else if(i->op == 63)
bprint(i, "FPSCR(%d)", i->crfd);
else
bprint(i, "CR(%d)", i->crfd);
break;
case 'e':
bprint(i, "%d", i->xsh);
break;
case 'E':
switch(IBF(i->w0,27,30)){ /* low bit is top bit of shift in rldiX cases */
case 8: i->mb = i->xmbe; i->me = 63; break; /* rldcl */
case 9: i->mb = 0; i->me = i->xmbe; break; /* rldcr */
case 4: case 5:
i->mb = i->xmbe; i->me = 63-i->xsh; break; /* rldic */
case 0: case 1:
i->mb = i->xmbe; i->me = 63; break; /* rldicl */
case 2: case 3:
i->mb = 0; i->me = i->xmbe; break; /* rldicr */
case 6: case 7:
i->mb = i->xmbe; i->me = 63-i->xsh; break; /* rldimi */
}
vmask = (~(uvlong)0>>i->mb) & (~(uvlong)0<<(63-i->me));
s = shmask(&vmask);
if(s)
bprint(i, "(%llux<<%d)", vmask, s);
else
bprint(i, "%llux", vmask);
break;
case 'i':
bprint(i, "$%d", i->simm);
break;
case 'I':
bprint(i, "$%ux", i->uimm);
break;
case 'j':
if(i->aa)
pglobal(i, i->li, 1, "(SB)");
else
pglobal(i, i->addr+i->li, 1, "");
break;
case 'J':
if(i->aa)
pglobal(i, i->bd, 1, "(SB)");
else
pglobal(i, i->addr+i->bd, 1, "");
break;
case 'k':
bprint(i, "%d", i->sh);
break;
case 'K':
bprint(i, "$%x", i->imm);
break;
case 'L':
if(i->lk)
bprint(i, "L");
break;
case 'l':
if(i->simm < 0)
bprint(i, "-%x(R%d)", -i->simm, i->ra);
else
bprint(i, "%x(R%d)", i->simm, i->ra);
break;
case 'm':
bprint(i, "%ux", i->crm);
break;
case 'M':
bprint(i, "%ux", i->fm);
break;
case 'n':
bprint(i, "%d", i->nb==0? 32: i->nb); /* eg, pg 10-103 */
break;
case 'P':
n = ((i->spr&0x1f)<<5)|((i->spr>>5)&0x1f);
for(s=0; sprname[s].name; s++)
if(sprname[s].n == n)
break;
if(sprname[s].name) {
if(s < 10)
bprint(i, sprname[s].name);
else
bprint(i, "SPR(%s)", sprname[s].name);
} else
bprint(i, "SPR(%d)", n);
break;
case 'Q':
n = ((i->spr&0x1f)<<5)|((i->spr>>5)&0x1f);
bprint(i, "%d", n);
break;
case 'S':
if(i->ra & 3)
bprint(i, "CR(INVAL:%d)", i->ra);
else if(i->op == 63)
bprint(i, "FPSCR(%d)", i->crfs);
else
bprint(i, "CR(%d)", i->crfs);
break;
case 'U':
if(i->rc)
bprint(i, "U");
break;
case 'V':
if(i->oe)
bprint(i, "V");
break;
case 'w':
bprint(i, "[%lux]", i->w0);
break;
case 'W':
if(i->m64)
bprint(i, "W");
break;
case 'Z':
if(i->m64)
bprint(i, "Z");
break;
case 'z':
if(i->mb <= i->me)
mask = ((ulong)~0L>>i->mb) & (~0L<<(31-i->me));
else
mask = ~(((ulong)~0L>>(i->me+1)) & (~0L<<(31-(i->mb-1))));
bprint(i, "%lux", mask);
break;
case '\0':
bprint(i, "%%");
return;
default:
bprint(i, "%%%c", *f);
break;
}
}
}
static int
printins(Map *map, uvlong pc, char *buf, int n)
{
Instr i;
Opcode *o;
mymap = map;
memset(&i, 0, sizeof(i));
i.curr = buf;
i.end = buf+n-1;
if(mkinstr(pc, &i) < 0)
return -1;
for(o = opcodes; o->mnemonic != 0; o++)
if(i.op == o->op && (i.xo & o->xomask) == o->xo) {
if (o->f)
(*o->f)(o, &i);
else
format(o->mnemonic, &i, o->ken);
return i.size*4;
}
bprint(&i, "unknown %lux", i.w0);
return i.size*4;
}
static int
powerinst(Map *map, uvlong pc, char modifier, char *buf, int n)
{
USED(modifier);
return printins(map, pc, buf, n);
}
static int
powerdas(Map *map, uvlong pc, char *buf, int n)
{
Instr instr;
mymap = map;
memset(&instr, 0, sizeof(instr));
instr.curr = buf;
instr.end = buf+n-1;
if (mkinstr(pc, &instr) < 0)
return -1;
if (instr.end-instr.curr > 8)
instr.curr = _hexify(instr.curr, instr.w0, 7);
if (instr.end-instr.curr > 9 && instr.size == 2) {
*instr.curr++ = ' ';
instr.curr = _hexify(instr.curr, instr.w1, 7);
}
*instr.curr = 0;
return instr.size*4;
}
static int
powerinstlen(Map *map, uvlong pc)
{
Instr i;
mymap = map;
if (mkinstr(pc, &i) < 0)
return -1;
return i.size*4;
}
static int
powerfoll(Map *map, uvlong pc, Rgetter rget, uvlong *foll)
{
char *reg;
Instr i;
mymap = map;
if (mkinstr(pc, &i) < 0)
return -1;
foll[0] = pc+4;
foll[1] = pc+4;
switch(i.op) {
default:
return 1;
case 18: /* branch */
foll[0] = i.li;
if(!i.aa)
foll[0] += pc;
break;
case 16: /* conditional branch */
foll[0] = i.bd;
if(!i.aa)
foll[0] += pc;
break;
case 19: /* conditional branch to register */
if(i.xo == 528)
reg = "CTR";
else if(i.xo == 16)
reg = "LR";
else
return 1; /* not a branch */
foll[0] = (*rget)(map, reg);
break;
}
if(i.lk)
return 2;
return 1;
}