From: Anton Vorontsov Date: Wed, 17 Dec 2008 10:08:55 +0000 (+0000) Subject: powerpc: Prepare xmon_save_regs for use with kdump X-Git-Tag: firefly_0821_release~16474^2~7 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=322b439455ea62e6480e300c77b258e872896381;p=firefly-linux-kernel-4.4.55.git powerpc: Prepare xmon_save_regs for use with kdump 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 Signed-off-by: Paul Mackerras --- diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index c6d1ab650778..f484a343efba 100644 --- a/arch/powerpc/include/asm/reg.h +++ b/arch/powerpc/include/asm/reg.h @@ -783,6 +783,10 @@ extern void scom970_write(unsigned int address, unsigned long value); #define __get_SP() ({unsigned long sp; \ asm volatile("mr %0,1": "=r" (sp)); sp;}) +struct pt_regs; + +extern void ppc_save_regs(struct pt_regs *regs); + #endif /* __ASSEMBLY__ */ #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_REG_H */ diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile index 92673b43858d..616c8891d858 100644 --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -102,6 +102,10 @@ endif obj-$(CONFIG_PPC64) += $(obj64-y) +ifneq ($(CONFIG_XMON),) +obj-y += ppc_save_regs.o +endif + extra-$(CONFIG_PPC_FPU) += fpu.o extra-$(CONFIG_PPC64) += entry_64.o diff --git a/arch/powerpc/kernel/ppc_save_regs.S b/arch/powerpc/kernel/ppc_save_regs.S new file mode 100644 index 000000000000..5113bd2285e1 --- /dev/null +++ b/arch/powerpc/kernel/ppc_save_regs.S @@ -0,0 +1,74 @@ +/* + * 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 +#include +#include + +/* + * 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(ppc_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 diff --git a/arch/powerpc/xmon/Makefile b/arch/powerpc/xmon/Makefile index 51d97588e762..9cb03b71b9d6 100644 --- a/arch/powerpc/xmon/Makefile +++ b/arch/powerpc/xmon/Makefile @@ -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 diff --git a/arch/powerpc/xmon/setjmp.S b/arch/powerpc/xmon/setjmp.S deleted file mode 100644 index 04c0b305ad4a..000000000000 --- a/arch/powerpc/xmon/setjmp.S +++ /dev/null @@ -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 -#include -#include - -/* - * 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 diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index 076368c8b8a9..8dfad7d9a004 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -41,6 +41,7 @@ #include #include #include +#include #ifdef CONFIG_PPC64 #include @@ -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(®s); + ppc_save_regs(®s); excp = ®s; }