Make remote GDB work for AIM processors. For BookE, the kernel

will have a special section, named .PPC.EMB.apuinfo, which will
tell GDB that a BookE processor is targeted and which will
result in GDB using a different register definition. In order
to support remote GDB for BookE, we need the GDB stub in the
kernel look for that section and use the BookE definitions.

2 files changed, 27 insertions, 43 deletions

diff --git a/sys/powerpc/include/gdb_machdep.h b/sys/powerpc/include/gdb_machdep.h
index e8c5055..7e36e97 100644
--- a/sys/powerpc/include/gdb_machdep.h
+++ b/sys/powerpc/include/gdb_machdep.h
@@ -29,20 +29,32 @@
 #ifndef _MACHINE_GDB_MACHDEP_H_
 #define	_MACHINE_GDB_MACHDEP_H_
 
-#define GDB_NREGS	153
+#define	PPC_GDB_NREGS4	(32 + 7 + 2)
+#define	PPC_GDB_NREGS8	32
+#define	PPC_GDB_NREGS16	32
+
+#define GDB_NREGS	(PPC_GDB_NREGS4 + PPC_GDB_NREGS8 + PPC_GDB_NREGS16)
 #define	GDB_REG_PC	64
 
-#define	GDB_BUFSZ	(GDB_NREGS*4)
+#define	GDB_BUFSZ	(PPC_GDB_NREGS4 * 8 +	\
+			 PPC_GDB_NREGS8 * 16 +	\
+			 PPC_GDB_NREGS16 * 32)
 
 static __inline size_t
 gdb_cpu_regsz(int regnum)
 {
-	return (sizeof(int));
+
+	if (regnum >= 32 && regnum <= 63)
+		return (8);
+	if (regnum >= 71 && regnum <= 102)
+		return (16);
+	return (4);
 }
 
 static __inline int
 gdb_cpu_query(void)
 {
+
 	return (0);
 }
 
diff --git a/sys/powerpc/powerpc/gdb_machdep.c b/sys/powerpc/powerpc/gdb_machdep.c
index a29ff5d..ebe1250 100644
--- a/sys/powerpc/powerpc/gdb_machdep.c
+++ b/sys/powerpc/powerpc/gdb_machdep.c
@@ -53,48 +53,20 @@ gdb_cpu_getreg(int regnum, size_t *regsz)
 	*regsz = gdb_cpu_regsz(regnum);
 
 	if (kdb_thread == curthread) {
-		switch (regnum) {
-		case 0: return (&kdb_frame->fixreg[0]);
-		case 2: return (&kdb_frame->fixreg[2]);
-		case 3: return (&kdb_frame->fixreg[3]);
-		case 4: return (&kdb_frame->fixreg[4]);
-		case 5: return (&kdb_frame->fixreg[5]);
-		case 6: return (&kdb_frame->fixreg[6]);
-		case 7: return (&kdb_frame->fixreg[7]);
-		case 8: return (&kdb_frame->fixreg[8]);
-		case 9: return (&kdb_frame->fixreg[9]);
-		case 10: return (&kdb_frame->fixreg[10]);
-		case 11: return (&kdb_frame->fixreg[11]);
-		case 12: return (&kdb_frame->fixreg[12]);
-		case 13: return (&kdb_frame->fixreg[13]);
-		case 64: return (&kdb_frame->srr0);
-		case 67: return (&kdb_frame->lr);
-
-		}
+		if (regnum == 0 || (regnum >= 2 && regnum <= 31))
+			return (kdb_frame->fixreg + regnum);
+		if (regnum == 64)
+			return (&kdb_frame->srr0);
+		if (regnum == 67)
+			return (&kdb_frame->lr);
 	}
 
-	switch (regnum) {
-	case 1: return (&kdb_thrctx->pcb_sp);
-	case 14: return (&kdb_thrctx->pcb_context[0]);
-	case 15: return (&kdb_thrctx->pcb_context[1]);
-	case 16: return (&kdb_thrctx->pcb_context[2]);
-	case 17: return (&kdb_thrctx->pcb_context[3]);
-	case 18: return (&kdb_thrctx->pcb_context[4]);
-	case 19: return (&kdb_thrctx->pcb_context[5]);
-	case 20: return (&kdb_thrctx->pcb_context[6]);
-	case 21: return (&kdb_thrctx->pcb_context[7]);
-	case 22: return (&kdb_thrctx->pcb_context[8]);
-	case 23: return (&kdb_thrctx->pcb_context[9]);
-	case 24: return (&kdb_thrctx->pcb_context[10]);
-	case 25: return (&kdb_thrctx->pcb_context[11]);
-	case 26: return (&kdb_thrctx->pcb_context[12]);
-	case 27: return (&kdb_thrctx->pcb_context[13]);
-	case 28: return (&kdb_thrctx->pcb_context[14]);
-	case 29: return (&kdb_thrctx->pcb_context[15]);
-	case 30: return (&kdb_thrctx->pcb_context[16]);
-	case 31: return (&kdb_thrctx->pcb_context[17]);
-	case 64: return (&kdb_thrctx->pcb_lr);
-	}
+	if (regnum == 1)
+		return (&kdb_thrctx->pcb_sp);
+	if (regnum >= 14 && regnum <= 31)
+		return (kdb_thrctx->pcb_context + (regnum - 14));
+	if (regnum == 64)
+		return (&kdb_thrctx->pcb_lr);
 
 	return (NULL);
 }