ref: 7be7d0681f567e97fd37f937c2e5e486d6d74eab
dir: /sys/src/libmach/kdb.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include <mach.h>
/*
* Sparc-specific debugger interface
*/
static char *sparcexcep(Map*, Rgetter);
static int sparcfoll(Map*, uvlong, Rgetter, uvlong*);
static int sparcinst(Map*, uvlong, char, char*, int);
static int sparcdas(Map*, uvlong, char*, int);
static int sparcinstlen(Map*, uvlong);
Machdata sparcmach =
{
{0x91, 0xd0, 0x20, 0x01}, /* breakpoint: TA $1 */
4, /* break point size */
beswab, /* convert short to local byte order */
beswal, /* convert long to local byte order */
beswav, /* convert vlong to local byte order */
risctrace, /* C traceback */
riscframe, /* frame finder */
sparcexcep, /* print exception */
0, /* breakpoint fixup */
beieeesftos, /* single precision float printer */
beieeedftos, /* double precision float printer */
sparcfoll, /* following addresses */
sparcinst, /* print instruction */
sparcdas, /* dissembler */
sparcinstlen, /* instruction size */
};
static char *trapname[] =
{
"reset",
"instruction access exception",
"illegal instruction",
"privileged instruction",
"fp disabled",
"window overflow",
"window underflow",
"unaligned address",
"fp exception",
"data access exception",
"tag overflow",
};
static char*
excname(ulong tbr)
{
static char buf[32];
if(tbr < sizeof trapname/sizeof(char*))
return trapname[tbr];
if(tbr >= 130)
sprint(buf, "trap instruction %ld", tbr-128);
else if(17<=tbr && tbr<=31)
sprint(buf, "interrupt level %ld", tbr-16);
else switch(tbr){
case 36:
return "cp disabled";
case 40:
return "cp exception";
case 128:
return "syscall";
case 129:
return "breakpoint";
default:
sprint(buf, "unknown trap %ld", tbr);
}
return buf;
}
static char*
sparcexcep(Map *map, Rgetter rget)
{
long tbr;
tbr = (*rget)(map, "TBR");
tbr = (tbr&0xFFF)>>4;
return excname(tbr);
}
/* Sparc disassembler and related functions */
struct opcode {
char *mnemonic;
void (*f)(struct instr*, char*);
int flag;
};
static char FRAMENAME[] = ".frame";
typedef struct instr Instr;
struct instr {
uchar op; /* bits 31-30 */
uchar rd; /* bits 29-25 */
uchar op2; /* bits 24-22 */
uchar a; /* bit 29 */
uchar cond; /* bits 28-25 */
uchar op3; /* bits 24-19 */
uchar rs1; /* bits 18-14 */
uchar i; /* bit 13 */
uchar asi; /* bits 12-05 */
uchar rs2; /* bits 04-00 */
short simm13; /* bits 12-00, signed */
ushort opf; /* bits 13-05 */
ulong immdisp22; /* bits 21-00 */
ulong simmdisp22; /* bits 21-00, signed */
ulong disp30; /* bits 30-00 */
ulong imm32; /* SETHI+ADD constant */
int target; /* SETHI+ADD dest reg */
long w0;
long w1;
uvlong addr; /* pc of instruction */
char *curr; /* current fill level in output buffer */
char *end; /* end of buffer */
int size; /* number of longs in instr */
char *err; /* errmsg */
};
static Map *mymap; /* disassembler context */
static int dascase;
static int mkinstr(uvlong, Instr*);
static void bra1(Instr*, char*, char*[]);
static void bra(Instr*, char*);
static void fbra(Instr*, char*);
static void cbra(Instr*, char*);
static void unimp(Instr*, char*);
static void fpop(Instr*, char*);
static void shift(Instr*, char*);
static void sethi(Instr*, char*);
static void load(Instr*, char*);
static void loada(Instr*, char*);
static void store(Instr*, char*);
static void storea(Instr*, char*);
static void add(Instr*, char*);
static void cmp(Instr*, char*);
static void wr(Instr*, char*);
static void jmpl(Instr*, char*);
static void rd(Instr*, char*);
static void loadf(Instr*, char*);
static void storef(Instr*, char*);
static void loadc(Instr*, char*);
static void loadcsr(Instr*, char*);
static void trap(Instr*, char*);
static struct opcode sparcop0[8] = {
[0] "UNIMP", unimp, 0, /* page 137 */
[2] "B", bra, 0, /* page 119 */
[4] "SETHI", sethi, 0, /* page 104 */
[6] "FB", fbra, 0, /* page 121 */
[7] "CB", cbra, 0, /* page 123 */
};
static struct opcode sparcop2[64] = {
[0x00] "ADD", add, 0, /* page 108 */
[0x10] "ADDCC", add, 0,
[0x08] "ADDX", add, 0,
[0x18] "ADDXCC", add, 0,
[0x20] "TADD", add, 0, /* page 109 */
[0x22] "TADDCCTV", add, 0,
[0x04] "SUB", add, 0, /* page 110 */
[0x14] "SUBCC", cmp, 0,
[0x0C] "SUBX", add, 0,
[0x1C] "SUBXCC", add, 0,
[0x21] "TSUB", add, 0, /* page 111 */
[0x23] "TSUBCCTV", add, 0,
[0x24] "MULSCC", add, 0, /* page 112 */
[0x0A] "UMUL", add, 0, /* page 113 */
[0x0B] "SMUL", add, 0,
[0x1A] "UMULCC", add, 0,
[0x1B] "SMULCC", add, 0,
[0x0E] "UDIV", add, 0, /* page 115 */
[0x0F] "SDIV", add, 0,
[0x1E] "UDIVCC", add, 0,
[0x1F] "SDIVCC", add, 0,
[0x01] "AND", add, 0, /* page 106 */
[0x11] "ANDCC", add, 0,
[0x05] "ANDN", add, 0,
[0x15] "ANDNCC", add, 0,
[0x02] "OR", add, 0,
[0x12] "ORCC", add, 0,
[0x06] "ORN", add, 0,
[0x16] "ORNCC", add, 0,
[0x03] "XOR", add, 0,
[0x13] "XORCC", add, 0,
[0x07] "XORN", add, 0,
[0x17] "XORNCC", add, 0,
[0x25] "SLL", shift, 0, /* page 107 */
[0x26] "SRL", shift, 0,
[0x27] "SRA", shift, 0,
[0x3C] "SAVE", add, 0, /* page 117 */
[0x3D] "RESTORE", add, 0,
[0x38] "JMPL", jmpl, 0, /* page 126 */
[0x39] "RETT", add, 0, /* page 127 */
[0x3A] "T", trap, 0, /* page 129 */
[0x28] "rdy", rd, 0, /* page 131 */
[0x29] "rdpsr", rd, 0,
[0x2A] "rdwim", rd, 0,
[0x2B] "rdtbr", rd, 0,
[0x30] "wry", wr, 0, /* page 133 */
[0x31] "wrpsr", wr, 0,
[0x32] "wrwim", wr, 0,
[0x33] "wrtbr", wr, 0,
[0x3B] "flush", add, 0, /* page 138 */
[0x34] "FPOP", fpop, 0, /* page 140 */
[0x35] "FPOP", fpop, 0,
};
static struct opcode sparcop3[64]={
[0x09] "ldsb", load, 0, /* page 90 */
[0x19] "ldsba", loada, 0,
[0x0A] "ldsh", load, 0,
[0x1A] "ldsha", loada, 0,
[0x01] "ldub", load, 0,
[0x11] "lduba", loada, 0,
[0x02] "lduh", load, 0,
[0x12] "lduha", loada, 0,
[0x00] "ld", load, 0,
[0x10] "lda", loada, 0,
[0x03] "ldd", load, 0,
[0x13] "ldda", loada, 0,
[0x20] "ldf", loadf, 0, /* page 92 */
[0x23] "lddf", loadf, 0,
[0x21] "ldfsr", loadf,0,
[0x30] "ldc", loadc, 0, /* page 94 */
[0x33] "lddc", loadc, 0,
[0x31] "ldcsr", loadcsr,0,
[0x05] "stb", store, 0, /* page 95 */
[0x15] "stba", storea, 0,
[0x06] "sth", store, 0,
[0x16] "stha", storea, 0,
[0x04] "st", store, 0,
[0x14] "sta", storea, 0,
[0x07] "std", store, 0,
[0x17] "stda", storea, 0,
[0x24] "stf", storef, 0, /* page 97 */
[0x27] "stdf", storef, 0,
[0x25] "stfsr", storef,0,
[0x26] "stdfq", storef,0,
[0x34] "stc", loadc, 0, /* page 99 */
[0x37] "stdc", loadc, 0,
[0x35] "stcsr", loadcsr,0,
[0x36] "stdcq", loadcsr,0,
[0x0D] "ldstub", store, 0, /* page 101 */
[0x1D] "ldstuba", storea, 0,
[0x0F] "swap", load, 0, /* page 102 */
[0x1F] "swapa", loada, 0,
};
#pragma varargck argpos bprint 2
#pragma varargck type "T" char*
/* convert to lower case from upper, according to dascase */
static int
Tfmt(Fmt *f)
{
char buf[128];
char *s, *t, *oa;
oa = va_arg(f->args, char*);
if(dascase){
for(s=oa,t=buf; *t = *s; s++,t++)
if('A'<=*t && *t<='Z')
*t += 'a'-'A';
return fmtstrcpy(f, buf);
}
return fmtstrcpy(f, oa);
}
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->op = (w >> 30) & 0x03;
i->rd = (w >> 25) & 0x1F;
i->op2 = (w >> 22) & 0x07;
i->a = (w >> 29) & 0x01;
i->cond = (w >> 25) & 0x0F;
i->op3 = (w >> 19) & 0x3F;
i->rs1 = (w >> 14) & 0x1F;
i->i = (w >> 13) & 0x01;
i->asi = (w >> 5) & 0xFF;
i->rs2 = (w >> 0) & 0x1F;
i->simm13 = (w >> 0) & 0x1FFF;
if(i->simm13 & (1<<12))
i->simm13 |= ~((1<<13)-1);
i->opf = (w >> 5) & 0x1FF;
i->immdisp22 = (w >> 0) & 0x3FFFFF;
i->simmdisp22 = i->immdisp22;
if(i->simmdisp22 & (1<<21))
i->simmdisp22 |= ~((1<<22)-1);
i->disp30 = (w >> 0) & 0x3FFFFFFF;
i->w0 = w;
i->target = -1;
i->addr = pc;
i->size = 1;
return 1;
}
static int
mkinstr(uvlong pc, Instr *i)
{
Instr xi;
if (decode(pc, i) < 0)
return -1;
if(i->op==0 && i->op2==4 && !dascase){ /* SETHI */
if (decode(pc+4, &xi) < 0)
return -1;
if(xi.op==2 && xi.op3==0) /* ADD */
if(xi.i == 1 && xi.rs1 == i->rd){ /* immediate to same reg */
i->imm32 = xi.simm13 + (i->immdisp22<<10);
i->target = xi.rd;
i->w1 = xi.w0;
i->size++;
return 1;
}
}
if(i->op==2 && i->opf==1 && !dascase){ /* FMOVS */
if (decode(pc+4, &xi) < 0)
return -1;
if(i->op==2 && i->opf==1) /* FMOVS */
if(xi.rd==i->rd+1 && xi.rs2==i->rs2+1){ /* next pair */
i->w1 = xi.w0;
i->size++;
}
}
return 1;
}
static int
printins(Map *map, uvlong pc, char *buf, int n)
{
Instr instr;
void (*f)(Instr*, char*);
mymap = map;
memset(&instr, 0, sizeof(instr));
instr.curr = buf;
instr.end = buf+n-1;
if (mkinstr(pc, &instr) < 0)
return -1;
switch(instr.op){
case 0:
f = sparcop0[instr.op2].f;
if(f)
(*f)(&instr, sparcop0[instr.op2].mnemonic);
else
bprint(&instr, "unknown %lux", instr.w0);
break;
case 1:
bprint(&instr, "%T", "CALL\t");
instr.curr += symoff(instr.curr, instr.end-instr.curr,
pc+instr.disp30*4, CTEXT);
if (!dascase)
bprint(&instr, "(SB)");
break;
case 2:
f = sparcop2[instr.op3].f;
if(f)
(*f)(&instr, sparcop2[instr.op3].mnemonic);
else
bprint(&instr, "unknown %lux", instr.w0);
break;
case 3:
f = sparcop3[instr.op3].f;
if(f)
(*f)(&instr, sparcop3[instr.op3].mnemonic);
else
bprint(&instr, "unknown %lux", instr.w0);
break;
}
if (instr.err) {
if (instr.curr != buf)
bprint(&instr, "\t\t;");
bprint(&instr, instr.err);
}
return instr.size*4;
}
static int
sparcinst(Map *map, uvlong pc, char modifier, char *buf, int n)
{
static int fmtinstalled = 0;
/* a modifier of 'I' toggles the dissassembler type */
if (!fmtinstalled) {
fmtinstalled = 1;
fmtinstall('T', Tfmt);
}
if ((asstype == ASUNSPARC && modifier == 'i')
|| (asstype == ASPARC && modifier == 'I'))
dascase = 'a'-'A';
else
dascase = 0;
return printins(map, pc, buf, n);
}
static int
sparcdas(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
sparcinstlen(Map *map, uvlong pc)
{
Instr i;
mymap = map;
if (mkinstr(pc, &i) < 0)
return -1;
return i.size*4;
}
static int
plocal(Instr *i)
{
int offset;
Symbol s;
if (!findsym(i->addr, CTEXT, &s) || !findlocal(&s, FRAMENAME, &s))
return -1;
if (s.value > i->simm13) {
if(getauto(&s, s.value-i->simm13, CAUTO, &s)) {
bprint(i, "%s+%lld(SP)", s.name, s.value);
return 1;
}
} else {
offset = i->simm13-s.value;
if (getauto(&s, offset-4, CPARAM, &s)) {
bprint(i, "%s+%d(FP)", s.name, offset);
return 1;
}
}
return -1;
}
static void
address(Instr *i)
{
Symbol s, s2;
uvlong off, off1;
if (i->rs1 == 1 && plocal(i) >= 0)
return;
off = mach->sb+i->simm13;
if(i->rs1 == 2 && findsym(off, CANY, &s)
&& s.value-off < 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, "$%s(SB)", s2.name);
return;
}
}
bprint(i, "%s", s.name);
if (s.value != off)
bprint(i, "+%llux", s.value-off);
bprint(i, "(SB)");
return;
}
bprint(i, "%ux(R%d)", i->simm13, i->rs1);
}
static void
unimp(Instr *i, char *m)
{
bprint(i, "%T", m);
}
static char *bratab[16] = { /* page 91 */
[0X8] "A",
[0X0] "N",
[0X9] "NE",
[0X1] "E",
[0XA] "G",
[0X2] "LE",
[0XB] "GE",
[0X3] "L",
[0XC] "GU",
[0X4] "LEU",
[0XD] "CC",
[0X5] "CS",
[0XE] "POS",
[0X6] "NEG",
[0XF] "VC",
[0X7] "VS",
};
static char *fbratab[16] = { /* page 91 */
[0X8] "A",
[0X0] "N",
[0X7] "U",
[0X6] "G",
[0X5] "UG",
[0X4] "L",
[0X3] "UL",
[0X2] "LG",
[0X1] "NE",
[0X9] "E",
[0XA] "UE",
[0XB] "GE",
[0XC] "UGE",
[0XD] "LE",
[0XE] "ULE",
[0XF] "O",
};
static char *cbratab[16] = { /* page 91 */
[0X8] "A",
[0X0] "N",
[0X7] "3",
[0X6] "2",
[0X5] "23",
[0X4] "1",
[0X3] "13",
[0X2] "12",
[0X1] "123",
[0X9] "0",
[0XA] "03",
[0XB] "02",
[0XC] "023",
[0XD] "01",
[0XE] "013",
[0XF] "012",
};
static void
bra1(Instr *i, char *m, char *tab[])
{
long imm;
imm = i->simmdisp22;
if(i->a)
bprint(i, "%T%T.%c\t", m, tab[i->cond], 'A'+dascase);
else
bprint(i, "%T%T\t", m, tab[i->cond]);
i->curr += symoff(i->curr, i->end-i->curr, i->addr+4*imm, CTEXT);
if (!dascase)
bprint(i, "(SB)");
}
static void
bra(Instr *i, char *m) /* page 91 */
{
bra1(i, m, bratab);
}
static void
fbra(Instr *i, char *m) /* page 93 */
{
bra1(i, m, fbratab);
}
static void
cbra(Instr *i, char *m) /* page 95 */
{
bra1(i, m, cbratab);
}
static void
trap(Instr *i, char *m) /* page 101 */
{
if(i->i == 0)
bprint(i, "%T%T\tR%d+R%d", m, bratab[i->cond], i->rs2, i->rs1);
else
bprint(i, "%T%T\t$%ux+R%d", m, bratab[i->cond], i->simm13, i->rs1);
}
static void
sethi(Instr *i, char *m) /* page 89 */
{
ulong imm;
imm = i->immdisp22<<10;
if(dascase){
bprint(i, "%T\t%lux, R%d", m, imm, i->rd);
return;
}
if(imm==0 && i->rd==0){
bprint(i, "NOP");
return;
}
if(i->target < 0){
bprint(i, "MOVW\t$%lux, R%d", imm, i->rd);
return;
}
bprint(i, "MOVW\t$%lux, R%d", i->imm32, i->target);
}
static char ldtab[] = {
'W',
'B',
'H',
'D',
};
static char*
moveinstr(int op3, char *m)
{
char *s;
int c;
static char buf[8];
if(!dascase){
/* batshit cases */
if(op3 == 0xF || op3 == 0x1F)
return "SWAP";
if(op3 == 0xD || op3 == 0x1D)
return "TAS"; /* really LDSTUB */
c = ldtab[op3&3];
s = "";
if((op3&11)==1 || (op3&11)==2)
s="U";
sprint(buf, "MOV%c%s", c, s);
return buf;
}
return m;
}
static void
load(Instr *i, char *m) /* page 68 */
{
m = moveinstr(i->op3, m);
if(i->i == 0)
bprint(i, "%s\t(R%d+R%d), R%d", m, i->rs1, i->rs2, i->rd);
else{
bprint(i, "%s\t", m);
address(i);
bprint(i, ", R%d", i->rd);
}
}
static void
loada(Instr *i, char *m) /* page 68 */
{
m = moveinstr(i->op3, m);
if(i->i == 0)
bprint(i, "%s\t(R%d+R%d, %d), R%d", m, i->rs1, i->rs2, i->asi, i->rd);
else
bprint(i, "unknown ld asi %lux", i->w0);
}
static void
store(Instr *i, char *m) /* page 74 */
{
m = moveinstr(i->op3, m);
if(i->i == 0)
bprint(i, "%s\tR%d, (R%d+R%d)",
m, i->rd, i->rs1, i->rs2);
else{
bprint(i, "%s\tR%d, ", m, i->rd);
address(i);
}
}
static void
storea(Instr *i, char *m) /* page 74 */
{
m = moveinstr(i->op3, m);
if(i->i == 0)
bprint(i, "%s\tR%d, (R%d+R%d, %d)", m, i->rd, i->rs1, i->rs2, i->asi);
else
bprint(i, "%s\tR%d, %d(R%d, %d), ???", m, i->rd, i->simm13, i->rs1, i->asi);
}
static void
shift(Instr *i, char *m) /* page 88 */
{
if(i->i == 0){
if(i->rs1 == i->rd)
if(dascase)
bprint(i, "%T\tR%d, R%d", m, i->rs1, i->rs2);
else
bprint(i, "%T\tR%d, R%d", m, i->rs2, i->rs1);
else
if(dascase)
bprint(i, "%T\tR%d, R%d, R%d", m, i->rs1, i->rs2, i->rd);
else
bprint(i, "%T\tR%d, R%d, R%d", m, i->rs2, i->rs1, i->rd);
}else{
if(i->rs1 == i->rd)
if(dascase)
bprint(i, "%T\t$%d,R%d", m, i->simm13&0x1F, i->rs1);
else
bprint(i, "%T\tR%d, $%d", m, i->rs1, i->simm13&0x1F);
else
if(dascase)
bprint(i, "%T\tR%d, $%d, R%d",m,i->rs1,i->simm13&0x1F,i->rd);
else
bprint(i, "%T\t$%d, R%d, R%d",m,i->simm13&0x1F,i->rs1,i->rd);
}
}
static void
add(Instr *i, char *m) /* page 82 */
{
if(i->i == 0){
if(dascase)
bprint(i, "%T\tR%d, R%d", m, i->rs1, i->rs2);
else
if(i->op3==2 && i->rs1==0 && i->rd) /* OR R2, R0, R1 */
bprint(i, "MOVW\tR%d", i->rs2);
else
bprint(i, "%T\tR%d, R%d", m, i->rs2, i->rs1);
}else{
if(dascase)
bprint(i, "%T\tR%d, $%ux", m, i->rs1, i->simm13);
else
if(i->op3==0 && i->rd && i->rs1==0) /* ADD $x, R0, R1 */
bprint(i, "MOVW\t$%ux", i->simm13);
else if(i->op3==0 && i->rd && i->rs1==2){
/* ADD $x, R2, R1 -> MOVW $x(SB), R1 */
bprint(i, "MOVW\t$");
address(i);
} else
bprint(i, "%T\t$%ux, R%d", m, i->simm13, i->rs1);
}
if(i->rs1 != i->rd)
bprint(i, ", R%d", i->rd);
}
static void
cmp(Instr *i, char *m)
{
if(dascase || i->rd){
add(i, m);
return;
}
if(i->i == 0)
bprint(i, "CMP\tR%d, R%d", i->rs1, i->rs2);
else
bprint(i, "CMP\tR%d, $%ux", i->rs1, i->simm13);
}
static char *regtab[4] = {
"Y",
"PSR",
"WIM",
"TBR",
};
static void
wr(Instr *i, char *m) /* page 82 */
{
if(dascase){
if(i->i == 0)
bprint(i, "%s\tR%d, R%d", m, i->rs1, i->rs2);
else
bprint(i, "%s\tR%d, $%ux", m, i->rs1, i->simm13);
}else{
if(i->i && i->simm13==0)
bprint(i, "MOVW\tR%d", i->rs1);
else if(i->i == 0)
bprint(i, "wr\tR%d, R%d", i->rs2, i->rs1);
else
bprint(i, "wr\t$%ux, R%d", i->simm13, i->rs1);
}
bprint(i, ", %s", regtab[i->op3&3]);
}
static void
rd(Instr *i, char *m) /* page 103 */
{
if(i->rs1==15 && i->rd==0){
m = "stbar";
if(!dascase)
m = "STBAR";
bprint(i, "%s", m);
}else{
if(!dascase)
m = "MOVW";
bprint(i, "%s\t%s, R%d", m, regtab[i->op3&3], i->rd);
}
}
static void
jmpl(Instr *i, char *m) /* page 82 */
{
if(i->i == 0){
if(i->rd == 15)
bprint(i, "%T\t(R%d+R%d)", "CALL", i->rs2, i->rs1);
else
bprint(i, "%T\t(R%d+R%d), R%d", m, i->rs2, i->rs1, i->rd);
}else{
if(!dascase && i->simm13==8 && i->rs1==15 && i->rd==0)
bprint(i, "RETURN");
else{
bprint(i, "%T\t", m);
address(i);
bprint(i, ", R%d", i->rd);
}
}
}
static void
loadf(Instr *i, char *m) /* page 70 */
{
if(!dascase){
m = "FMOVD";
if(i->op3 == 0x20)
m = "FMOVF";
else if(i->op3 == 0x21)
m = "MOVW";
}
if(i->i == 0)
bprint(i, "%s\t(R%d+R%d)", m, i->rs1, i->rs2);
else{
bprint(i, "%s\t", m);
address(i);
}
if(i->op3 == 0x21)
bprint(i, ", FSR");
else
bprint(i, ", R%d", i->rd);
}
static void
storef(Instr *i, char *m) /* page 70 */
{
if(!dascase){
m = "FMOVD";
if(i->op3 == 0x25 || i->op3 == 0x26)
m = "MOVW";
else if(i->op3 == 0x20)
m = "FMOVF";
}
bprint(i, "%s\t", m);
if(i->op3 == 0x25)
bprint(i, "FSR, ");
else if(i->op3 == 0x26)
bprint(i, "FQ, ");
else
bprint(i, "R%d, ", i->rd);
if(i->i == 0)
bprint(i, "(R%d+R%d)", i->rs1, i->rs2);
else
address(i);
}
static void
loadc(Instr *i, char *m) /* page 72 */
{
if(i->i == 0)
bprint(i, "%s\t(R%d+R%d), C%d", m, i->rs1, i->rs2, i->rd);
else{
bprint(i, "%s\t", m);
address(i);
bprint(i, ", C%d", i->rd);
}
}
static void
loadcsr(Instr *i, char *m) /* page 72 */
{
if(i->i == 0)
bprint(i, "%s\t(R%d+R%d), CSR", m, i->rs1, i->rs2);
else{
bprint(i, "%s\t", m);
address(i);
bprint(i, ", CSR");
}
}
static struct{
int opf;
char *name;
} fptab1[] = { /* ignores rs1 */
0xC4, "FITOS", /* page 109 */
0xC8, "FITOD",
0xCC, "FITOX",
0xD1, "FSTOI", /* page 110 */
0xD2, "FDTOI",
0xD3, "FXTOI",
0xC9, "FSTOD", /* page 111 */
0xCD, "FSTOX",
0xC6, "FDTOS",
0xCE, "FDTOX",
0xC7, "FXTOS",
0xCB, "FXTOD",
0x01, "FMOVS", /* page 112 */
0x05, "FNEGS",
0x09, "FABSS",
0x29, "FSQRTS", /* page 113 */
0x2A, "FSQRTD",
0x2B, "FSQRTX",
0, 0,
};
static struct{
int opf;
char *name;
} fptab2[] = { /* uses rs1 */
0x41, "FADDS", /* page 114 */
0x42, "FADDD",
0x43, "FADDX",
0x45, "FSUBS",
0x46, "FSUBD",
0x47, "FSUBX",
0x49, "FMULS", /* page 115 */
0x4A, "FMULD",
0x4B, "FMULX",
0x4D, "FDIVS",
0x4E, "FDIVD",
0x4F, "FDIVX",
0x51, "FCMPS", /* page 116 */
0x52, "FCMPD",
0x53, "FCMPX",
0x55, "FCMPES",
0x56, "FCMPED",
0x57, "FCMPEX",
0, 0
};
static void
fpop(Instr *i, char *m) /* page 108-116 */
{
int j;
if(dascase==0 && i->size==2){
bprint(i, "FMOVD\tF%d, F%d", i->rs2, i->rd);
return;
}
for(j=0; fptab1[j].name; j++)
if(fptab1[j].opf == i->opf){
bprint(i, "%T\tF%d, F%d", fptab1[j].name, i->rs2, i->rd);
return;
}
for(j=0; fptab2[j].name; j++)
if(fptab2[j].opf == i->opf){
bprint(i, "%T\tF%d, F%d, F%d", fptab2[j].name, i->rs1, i->rs2, i->rd);
return;
}
bprint(i, "%T%ux\tF%d, F%d, F%d", m, i->opf, i->rs1, i->rs2, i->rd);
}
static int
sparcfoll(Map *map, uvlong pc, Rgetter rget, uvlong *foll)
{
ulong w, r1, r2;
char buf[8];
Instr i;
mymap = map;
if (mkinstr(pc, &i) < 0)
return -1;
w = i.w0;
switch(w & 0xC1C00000){
case 0x00800000: /* branch on int cond */
case 0x01800000: /* branch on fp cond */
case 0x01C00000: /* branch on copr cond */
foll[0] = pc+8;
foll[1] = pc + (i.simmdisp22<<2);
return 2;
}
if((w&0xC0000000) == 0x40000000){ /* CALL */
foll[0] = pc + (i.disp30<<2);
return 1;
}
if((w&0xC1F80000) == 0x81C00000){ /* JMPL */
sprint(buf, "R%ld", (w>>14)&0xF);
r1 = (*rget)(map, buf);
if(w & 0x2000) /* JMPL R1+simm13 */
r2 = i.simm13;
else{ /* JMPL R1+R2 */
sprint(buf, "R%ld", w&0xF);
r2 = (*rget)(map, buf);
}
foll[0] = r1 + r2;
return 1;
}
foll[0] = pc+i.size*4;
return 1;
}