xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

powerpc: Prepare xmon_save_regs for use with kdump

Browse Source 
Today the arch/powerpc/xmon/setjmp.S file contains only the
xmon_save_regs function.  We want to use it for kdump purposes, so
let's move the file into arch/powerpc/kernel/ and give the function a
more generic name (ppc_save_regs).

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Anton Vorontsov
2008-12-17 10:08:55 +00:00
committed by Paul Mackerras
parent 5be8554875
commit 322b439455
5 changed files with 12 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/powerpc/xmon/Makefile
View File

@@ -4,7 +4,7 @@ ifdef CONFIG_PPC64
EXTRA_CFLAGS += -mno-minimal-toc
endif
obj-y += xmon.o setjmp.o start.o nonstdio.o
obj-y += xmon.o start.o nonstdio.o
ifdef CONFIG_XMON_DISASSEMBLY
obj-y += ppc-dis.o ppc-opc.o

74
arch/powerpc/xmon/setjmp.S
View File

@@ -1,74 +0,0 @@
/*
* 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>
/*
* 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)
PPC_STL r0,0*SZL(r3)
PPC_STL r2,2*SZL(r3)
PPC_STL r3,3*SZL(r3)
PPC_STL r4,4*SZL(r3)
PPC_STL r5,5*SZL(r3)
PPC_STL r6,6*SZL(r3)
PPC_STL r7,7*SZL(r3)
PPC_STL r8,8*SZL(r3)
PPC_STL r9,9*SZL(r3)
PPC_STL r10,10*SZL(r3)
PPC_STL r11,11*SZL(r3)
PPC_STL r12,12*SZL(r3)
PPC_STL r13,13*SZL(r3)
PPC_STL r14,14*SZL(r3)
PPC_STL r15,15*SZL(r3)
PPC_STL r16,16*SZL(r3)
PPC_STL r17,17*SZL(r3)
PPC_STL r18,18*SZL(r3)
PPC_STL r19,19*SZL(r3)
PPC_STL r20,20*SZL(r3)
PPC_STL r21,21*SZL(r3)
PPC_STL r22,22*SZL(r3)
PPC_STL r23,23*SZL(r3)
PPC_STL r24,24*SZL(r3)
PPC_STL r25,25*SZL(r3)
PPC_STL r26,26*SZL(r3)
PPC_STL r27,27*SZL(r3)
PPC_STL r28,28*SZL(r3)
PPC_STL r29,29*SZL(r3)
PPC_STL r30,30*SZL(r3)
PPC_STL r31,31*SZL(r3)
/* go up one stack frame for SP */
PPC_LL r4,0(r1)
PPC_STL r4,1*SZL(r3)
/* get caller's LR */
PPC_LL r0,LRSAVE(r4)
PPC_STL r0,_NIP-STACK_FRAME_OVERHEAD(r3)
PPC_STL r0,_LINK-STACK_FRAME_OVERHEAD(r3)
mfmsr r0
PPC_STL r0,_MSR-STACK_FRAME_OVERHEAD(r3)
mfctr r0
PPC_STL r0,_CTR-STACK_FRAME_OVERHEAD(r3)
mfxer r0
PPC_STL r0,_XER-STACK_FRAME_OVERHEAD(r3)
mfcr r0
PPC_STL r0,_CCR-STACK_FRAME_OVERHEAD(r3)
li r0,0
PPC_STL r0,_TRAP-STACK_FRAME_OVERHEAD(r3)
blr

5
arch/powerpc/xmon/xmon.c
View File

@@ -41,6 +41,7 @@
#include <asm/spu_priv1.h>
#include <asm/firmware.h>
#include <asm/setjmp.h>
#include <asm/reg.h>
#ifdef CONFIG_PPC64
#include <asm/hvcall.h>
@@ -159,8 +160,6 @@ static int xmon_no_auto_backtrace;
extern void xmon_enter(void);
extern void xmon_leave(void);
extern void xmon_save_regs(struct pt_regs *);
#ifdef CONFIG_PPC64
#define REG "%.16lx"
#define REGS_PER_LINE 4
@@ -532,7 +531,7 @@ int xmon(struct pt_regs *excp)
struct pt_regs regs;
if (excp == NULL) {
xmon_save_regs(&regs);
ppc_save_regs(&regs);
excp = &regs;
}