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#include <u.h>
#include <libc.h>
#include <bio.h>
#include <mach.h>
int
locfmt(Fmt *fmt)
{
Loc l;
l = va_arg(fmt->args, Loc);
switch(l.type){
default:
return fmtprint(fmt, "<loc%d>", l.type);
case LCONST:
return fmtprint(fmt, "0x%lux", l.addr);
case LADDR:
return fmtprint(fmt, "*0x%lux", l.addr);
case LOFFSET:
return fmtprint(fmt, "%ld(%s)", l.offset, l.reg);
case LREG:
return fmtprint(fmt, "%s", l.reg);
}
}
int
loccmp(Loc *a, Loc *b)
{
int i;
if(a->type < b->type)
return -1;
if(a->type > b->type)
return 1;
switch(a->type){
default:
return 0;
case LADDR:
if(a->addr < b->addr)
return -1;
if(a->addr > b->addr)
return 1;
return 0;
case LOFFSET:
i = strcmp(a->reg, b->reg);
if(i != 0)
return i;
if(a->offset < b->offset)
return -1;
if(a->offset > b->offset)
return 1;
return 0;
case LREG:
return strcmp(a->reg, b->reg);
}
}
int
lget1(Map *map, Regs *regs, Loc loc, uchar *a, uint n)
{
if(locsimplify(map, regs, loc, &loc) < 0)
return -1;
if(loc.type == LADDR)
return get1(map, loc.addr, a, n);
/* could do more here - i'm lazy */
werrstr("bad location for lget1");
return -1;
}
int
lget2(Map *map, Regs *regs, Loc loc, u16int *u)
{
u64int ul;
if(locsimplify(map, regs, loc, &loc) < 0)
return -1;
if(loc.type == LADDR)
return get2(map, loc.addr, u);
if(loc.type == LCONST){
*u = loc.addr;
return 0;
}
if(loc.type == LREG){
if(rget(regs, loc.reg, &ul) < 0)
return -1;
*u = ul;
return 0;
}
werrstr("bad location for lget2");
return -1;
}
int
lget4(Map *map, Regs *regs, Loc loc, u32int *u)
{
u64int ul;
if(locsimplify(map, regs, loc, &loc) < 0)
return -1;
if(loc.type == LADDR)
return get4(map, loc.addr, u);
if(loc.type == LCONST){
*u = loc.addr;
return 0;
}
if(loc.type == LREG){
if(rget(regs, loc.reg, &ul) < 0)
return -1;
*u = ul;
return 0;
}
werrstr("bad location for lget4");
return -1;
}
int
lgeta(Map *map, Regs *regs, Loc loc, u64int *u)
{
u32int v;
if(machcpu == &machamd64)
return lget8(map, regs, loc, u);
if(lget4(map, regs, loc, &v) < 0)
return -1;
*u = v;
return 4;
}
int
lget8(Map *map, Regs *regs, Loc loc, u64int *u)
{
u64int ul;
if(locsimplify(map, regs, loc, &loc) < 0)
return -1;
if(loc.type == LADDR)
return get8(map, loc.addr, u);
if(loc.type == LCONST){
*u = loc.addr;
return 0;
}
if(loc.type == LREG){
if(rget(regs, loc.reg, &ul) < 0)
return -1;
*u = ul;
return 0;
}
werrstr("bad location for lget8");
return -1;
}
int
lput1(Map *map, Regs *regs, Loc loc, uchar *a, uint n)
{
if(locsimplify(map, regs, loc, &loc) < 0)
return -1;
if(loc.type == LADDR)
return put1(map, loc.addr, a, n);
/* could do more here - i'm lazy */
werrstr("bad location for lput1");
return -1;
}
int
lput2(Map *map, Regs *regs, Loc loc, u16int u)
{
if(locsimplify(map, regs, loc, &loc) < 0)
return -1;
if(loc.type == LADDR)
return put2(map, loc.addr, u);
if(loc.type == LREG)
return rput(regs, loc.reg, u);
werrstr("bad location for lput2");
return -1;
}
int
lput4(Map *map, Regs *regs, Loc loc, u32int u)
{
if(locsimplify(map, regs, loc, &loc) < 0)
return -1;
if(loc.type == LADDR)
return put4(map, loc.addr, u);
if(loc.type == LREG)
return rput(regs, loc.reg, u);
werrstr("bad location for lput4");
return -1;
}
int
lput8(Map *map, Regs *regs, Loc loc, u64int u)
{
if(locsimplify(map, regs, loc, &loc) < 0)
return -1;
if(loc.type == LADDR)
return put8(map, loc.addr, u);
if(loc.type == LREG)
return rput(regs, loc.reg, u);
werrstr("bad location for lput8");
return -1;
}
static Loc zl;
Loc
locaddr(u64int addr)
{
Loc l;
l = zl;
l.type = LADDR;
l.addr = addr;
return l;
}
Loc
locindir(char *reg, long offset)
{
Loc l;
l = zl;
l.type = LOFFSET;
l.reg = reg;
l.offset = offset;
l.addr = 0; /* SHUT UP GCC 4.0 */
return l;
}
Loc
locconst(u64int con)
{
Loc l;
l = zl;
l.type = LCONST;
l.addr = con;
return l;
}
Loc
locnone(void)
{
Loc l;
l = zl;
l.type = LNONE;
return l;
}
Loc
locreg(char *reg)
{
Loc l;
l = zl;
l.type = LREG;
l.reg = reg;
return l;
}
int
locsimplify(Map *map, Regs *regs, Loc loc, Loc *newloc)
{
u64int u;
if(loc.type == LOFFSET){
if(rget(regs, loc.reg, &u) < 0)
return -1;
*newloc = locaddr(u + loc.offset);
}else
*newloc = loc;
return 0;
}
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