powerpc: Merge xmon
The merged version follows the ppc64 version pretty closely mostly,
and in fact ARCH=ppc64 now uses the arch/powerpc/xmon version.
The main difference for ppc64 is that the 'p' command to call
show_state (which was always pretty dodgy) has been replaced by
the ppc32 'p' command, which calls a given procedure (so in fact
the old 'p' command behaviour can be achieved with 'p $show_state').
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/xmon/setjmp.S b/arch/powerpc/xmon/setjmp.S
new file mode 100644
index 0000000..f8e40df
--- /dev/null
+++ b/arch/powerpc/xmon/setjmp.S
@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 1996 Paul Mackerras.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * NOTE: assert(sizeof(buf) > 23 * sizeof(long))
+ */
+#include <asm/processor.h>
+#include <asm/ppc_asm.h>
+#include <asm/asm-offsets.h>
+
+_GLOBAL(xmon_setjmp)
+ mflr r0
+ STL r0,0(r3)
+ STL r1,SZL(r3)
+ STL r2,2*SZL(r3)
+ mfcr r0
+ STL r0,3*SZL(r3)
+ STL r13,4*SZL(r3)
+ STL r14,5*SZL(r3)
+ STL r15,6*SZL(r3)
+ STL r16,7*SZL(r3)
+ STL r17,8*SZL(r3)
+ STL r18,9*SZL(r3)
+ STL r19,10*SZL(r3)
+ STL r20,11*SZL(r3)
+ STL r21,12*SZL(r3)
+ STL r22,13*SZL(r3)
+ STL r23,14*SZL(r3)
+ STL r24,15*SZL(r3)
+ STL r25,16*SZL(r3)
+ STL r26,17*SZL(r3)
+ STL r27,18*SZL(r3)
+ STL r28,19*SZL(r3)
+ STL r29,20*SZL(r3)
+ STL r30,21*SZL(r3)
+ STL r31,22*SZL(r3)
+ li r3,0
+ blr
+
+_GLOBAL(xmon_longjmp)
+ CMPI r4,0
+ bne 1f
+ li r4,1
+1: LDL r13,4*SZL(r3)
+ LDL r14,5*SZL(r3)
+ LDL r15,6*SZL(r3)
+ LDL r16,7*SZL(r3)
+ LDL r17,8*SZL(r3)
+ LDL r18,9*SZL(r3)
+ LDL r19,10*SZL(r3)
+ LDL r20,11*SZL(r3)
+ LDL r21,12*SZL(r3)
+ LDL r22,13*SZL(r3)
+ LDL r23,14*SZL(r3)
+ LDL r24,15*SZL(r3)
+ LDL r25,16*SZL(r3)
+ LDL r26,17*SZL(r3)
+ LDL r27,18*SZL(r3)
+ LDL r28,19*SZL(r3)
+ LDL r29,20*SZL(r3)
+ LDL r30,21*SZL(r3)
+ LDL r31,22*SZL(r3)
+ LDL r0,3*SZL(r3)
+ mtcrf 0x38,r0
+ LDL r0,0(r3)
+ LDL r1,SZL(r3)
+ LDL r2,2*SZL(r3)
+ mtlr r0
+ mr r3,r4
+ blr
+
+/*
+ * Grab the register values as they are now.
+ * This won't do a particularily good job because we really
+ * want our caller's caller's registers, and our caller has
+ * already executed its prologue.
+ * ToDo: We could reach back into the caller's save area to do
+ * a better job of representing the caller's state (note that
+ * that will be different for 32-bit and 64-bit, because of the
+ * different ABIs, though).
+ */
+_GLOBAL(xmon_save_regs)
+ STL r0,0*SZL(r3)
+ STL r2,2*SZL(r3)
+ STL r3,3*SZL(r3)
+ STL r4,4*SZL(r3)
+ STL r5,5*SZL(r3)
+ STL r6,6*SZL(r3)
+ STL r7,7*SZL(r3)
+ STL r8,8*SZL(r3)
+ STL r9,9*SZL(r3)
+ STL r10,10*SZL(r3)
+ STL r11,11*SZL(r3)
+ STL r12,12*SZL(r3)
+ STL r13,13*SZL(r3)
+ STL r14,14*SZL(r3)
+ STL r15,15*SZL(r3)
+ STL r16,16*SZL(r3)
+ STL r17,17*SZL(r3)
+ STL r18,18*SZL(r3)
+ STL r19,19*SZL(r3)
+ STL r20,20*SZL(r3)
+ STL r21,21*SZL(r3)
+ STL r22,22*SZL(r3)
+ STL r23,23*SZL(r3)
+ STL r24,24*SZL(r3)
+ STL r25,25*SZL(r3)
+ STL r26,26*SZL(r3)
+ STL r27,27*SZL(r3)
+ STL r28,28*SZL(r3)
+ STL r29,29*SZL(r3)
+ STL r30,30*SZL(r3)
+ STL r31,31*SZL(r3)
+ /* go up one stack frame for SP */
+ LDL r4,0(r1)
+ STL r4,1*SZL(r3)
+ /* get caller's LR */
+ LDL r0,LRSAVE(r4)
+ STL r0,_NIP-STACK_FRAME_OVERHEAD(r3)
+ STL r0,_LINK-STACK_FRAME_OVERHEAD(r3)
+ mfmsr r0
+ STL r0,_MSR-STACK_FRAME_OVERHEAD(r3)
+ mfctr r0
+ STL r0,_CTR-STACK_FRAME_OVERHEAD(r3)
+ mfxer r0
+ STL r0,_XER-STACK_FRAME_OVERHEAD(r3)
+ mfcr r0
+ STL r0,_CCR-STACK_FRAME_OVERHEAD(r3)
+ li r0,0
+ STL r0,_TRAP-STACK_FRAME_OVERHEAD(r3)
+ blr