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#include <u.h>
#include <libc.h>
#include <mach.h>
#include "macho.h"
#include "uregpower.h"
enum
{
ThreadState = 1,
FloatState,
ExceptionState,
VectorState,
ThreadState64,
ExceptionState64,
ThreadStateNone,
};
typedef struct Lreg Lreg;
typedef struct Lflt Lflt;
typedef struct Lexc Lexc;
struct Lreg
{
u32int srr0;
u32int srr1;
u32int r0;
u32int r1;
u32int r2;
u32int r3;
u32int r4;
u32int r5;
u32int r6;
u32int r7;
u32int r8;
u32int r9;
u32int r10;
u32int r11;
u32int r12;
u32int r13;
u32int r14;
u32int r15;
u32int r16;
u32int r17;
u32int r18;
u32int r19;
u32int r20;
u32int r21;
u32int r22;
u32int r23;
u32int r24;
u32int r25;
u32int r26;
u32int r27;
u32int r28;
u32int r29;
u32int r30;
u32int r31;
u32int cr;
u32int xer;
u32int lr;
u32int ctr;
u32int mq;
u32int vrsave;
};
struct Lflt
{
u32int fpregs[32*2]; /* 32 doubles */
u32int fpscr[2];
};
struct Lexc
{
u32int dar;
u32int dsisr;
u32int exception;
u32int pad0;
u32int pad1[4];
};
static void
lreg2ureg(Lreg *l, Ureg *u)
{
u->pc = l->srr0;
u->srr1 = l->srr1;
u->lr = l->lr;
u->cr = l->cr;
u->xer = l->xer;
u->ctr = l->ctr;
u->vrsave = l->vrsave;
memmove(&u->r0, &l->r0, 32*4);
}
static void
lexc2ureg(Lexc *l, Ureg *u)
{
u->cause = l->exception;
u->dar = l->dar;
u->dsisr = l->dsisr;
}
static uchar*
load(int fd, ulong off, int size)
{
uchar *a;
a = malloc(size);
if(a == nil)
return nil;
if(seek(fd, off, 0) < 0 || readn(fd, a, size) != size){
free(a);
return nil;
}
return a;
}
int
coreregsmachopower(Macho *m, uchar **up)
{
int i, havereg, haveexc;
uchar *a, *p, *nextp;
Ureg *u;
ulong flavor, count;
MachoCmd *c;
*up = nil;
for(i=0; i<m->ncmd; i++)
if(m->cmd[i].type == MachoCmdThread)
break;
if(i == m->ncmd){
werrstr("no registers found");
return -1;
}
c = &m->cmd[i];
a = load(m->fd, c->off, c->size);
if(a == nil)
return -1;
if((u = mallocz(sizeof(Ureg), 1)) == nil){
free(a);
return -1;
}
havereg = haveexc = 0;
for(p=a+8; p<a+c->size; p=nextp){
flavor = m->e4(p);
count = m->e4(p+4);
nextp = p+8+count*4;
if(flavor == ThreadState && count*4 == sizeof(Lreg)){
havereg = 1;
lreg2ureg((Lreg*)(p+8), u);
}
if(flavor == ExceptionState && count*4 == sizeof(Lexc)){
haveexc = 1;
lexc2ureg((Lexc*)(p+8), u);
}
}
free(a);
if(!havereg){
werrstr("no registers found");
free(u);
return -1;
}
if(!haveexc)
fprint(2, "warning: no exception state in core file registers\n");
*up = (uchar*)u;
return sizeof(*u);
}
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