Hello everybody, Changes from previous version: - removed bogus hyphen from the patch; - move ifdefs to crt.S instead of Makefile
Please find here patch for user land kexec-tools application. Following patch makes kexec-tools work for both kexec and kdump. I tested it with git kernel (linus-tree) and Freescale/Logic MPC8360ERDK board with mpc83xx_defconfig kernel config. kexec: kexec -l vmlinux --command-line="console= ... etc" kexec -e kdump: kexec -p vmlinux_dump --command-line="console=... etc" echo c > /proc/sysrq-trigger I also think that is is reasonable: - put GAME_CUBE specific code to separate files; - combine ppc and ppc64 to powerpc directory (I'm planning to do it. And that why in some places my patch have ifdefs for PPC64); Best regards, Maxim Uvarov. From: Maxim Uvarov <muva...@gmail.com> Linker does not provide some vital functions when building freestanding applications with a new toolchain, so we have to provide our own CRT. p.s. Without the CRT we won't see any build errors (since the purgatory is linked with --no-undefined), but the purgatory code won't work, 'kexec -e' will just hang the board. I added option to configure to keep code buildable for old toolchais. But there should be way to do this automatically. Author: Anton Vorontsov <avoront...@ru.mvista.com> Signed-off-by: Maxim Uvarov <muva...@gmail.com> Signed-off-by: Maxim Uvarov <muva...@gmail.com> --- configure.ac | 9 + purgatory/arch/ppc/Makefile | 1 purgatory/arch/ppc/crt.S | 263 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 273 insertions(+), 0 deletions(-) create mode 100644 purgatory/arch/ppc/crt.S diff --git a/configure.ac b/configure.ac index fcf50e4..63606bc 100644 --- a/configure.ac +++ b/configure.ac @@ -159,6 +159,15 @@ if test "$with_xen" = yes ; then AC_MSG_NOTICE([Xen support disabled]))) fi +dnl new toolchains +if test "$ARCH" = ppc; then +AC_ARG_WITH([oldtoolchain], + AC_HELP_STRING([--with-oldtoolchain],[compile without crt.S + required for new toolchains]), + AC_DEFINE(PPC_OLDTOOLCHAIN, 1, + [Define to compile with old toolchains])) +fi + dnl ---Sanity checks if test "$CC" = "no"; then AC_MSG_ERROR([cc not found]); fi if test "$CPP" = "no"; then AC_MSG_ERROR([cpp not found]); fi diff --git a/purgatory/arch/ppc/Makefile b/purgatory/arch/ppc/Makefile index 72289a0..4020778 100644 --- a/purgatory/arch/ppc/Makefile +++ b/purgatory/arch/ppc/Makefile @@ -6,6 +6,7 @@ ppc_PURGATORY_SRCS += purgatory/arch/ppc/v2wrap_32.S ppc_PURGATORY_SRCS += purgatory/arch/ppc/misc.S ppc_PURGATORY_SRCS += purgatory/arch/ppc/purgatory-ppc.c ppc_PURGATORY_SRCS += purgatory/arch/ppc/console-ppc.c +ppc_PURGATORY_SRCS += purgatory/arch/ppc/crt.S dist += purgatory/arch/ppc/Makefile $(ppc_PURGATORY_SRCS) \ purgatory/arch/ppc/purgatory-ppc.h purgatory/arch/ppc/ppc_asm.h diff --git a/purgatory/arch/ppc/crt.S b/purgatory/arch/ppc/crt.S new file mode 100644 index 0000000..70f4d61 --- /dev/null +++ b/purgatory/arch/ppc/crt.S @@ -0,0 +1,263 @@ +/* This is from linux-2.6/arch/powerpc/lib/crtsavres.S: + * + * Special support for eabi and SVR4 + * + * Copyright (C) 1995, 1996, 1998, 2000, 2001 Free Software Foundation, Inc. + * Copyright 2008 Freescale Semiconductor, Inc. + * Written By Michael Meissner + * + * Based on gcc/config/rs6000/crtsavres.asm from gcc + * + * This file 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, or (at your option) any + * later version. + * + * In addition to the permissions in the GNU General Public License, the + * Free Software Foundation gives you unlimited permission to link the + * compiled version of this file with other programs, and to distribute + * those programs without any restriction coming from the use of this + * file. (The General Public License restrictions do apply in other + * respects; for example, they cover modification of the file, and + * distribution when not linked into another program.) + * + * This file is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; see the file COPYING. If not, write to + * the Free Software Foundation, 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + * + * As a special exception, if you link this library with files + * compiled with GCC to produce an executable, this does not cause + * the resulting executable to be covered by the GNU General Public License. + * This exception does not however invalidate any other reasons why + * the executable file might be covered by the GNU General Public License. + */ +#include "config.h" + +/* On PowerPC64 Linux, these functions are provided by the linker. */ +#ifndef PPC_OLDTOOLCHAIN +#ifndef __powerpc64__ +#define _GLOBAL(name) \ + .type name,@function; \ + .globl name; \ +name: + +/* Routines for saving integer registers, called by the compiler. */ +/* Called with r11 pointing to the stack header word of the caller of the */ +/* function, just beyond the end of the integer save area. */ + +_GLOBAL(_savegpr_14) +_GLOBAL(_save32gpr_14) + stw 14,-72(11) /* save gp registers */ +_GLOBAL(_savegpr_15) +_GLOBAL(_save32gpr_15) + stw 15,-68(11) +_GLOBAL(_savegpr_16) +_GLOBAL(_save32gpr_16) + stw 16,-64(11) +_GLOBAL(_savegpr_17) +_GLOBAL(_save32gpr_17) + stw 17,-60(11) +_GLOBAL(_savegpr_18) +_GLOBAL(_save32gpr_18) + stw 18,-56(11) +_GLOBAL(_savegpr_19) +_GLOBAL(_save32gpr_19) + stw 19,-52(11) +_GLOBAL(_savegpr_20) +_GLOBAL(_save32gpr_20) + stw 20,-48(11) +_GLOBAL(_savegpr_21) +_GLOBAL(_save32gpr_21) + stw 21,-44(11) +_GLOBAL(_savegpr_22) +_GLOBAL(_save32gpr_22) + stw 22,-40(11) +_GLOBAL(_savegpr_23) +_GLOBAL(_save32gpr_23) + stw 23,-36(11) +_GLOBAL(_savegpr_24) +_GLOBAL(_save32gpr_24) + stw 24,-32(11) +_GLOBAL(_savegpr_25) +_GLOBAL(_save32gpr_25) + stw 25,-28(11) +_GLOBAL(_savegpr_26) +_GLOBAL(_save32gpr_26) + stw 26,-24(11) +_GLOBAL(_savegpr_27) +_GLOBAL(_save32gpr_27) + stw 27,-20(11) +_GLOBAL(_savegpr_28) +_GLOBAL(_save32gpr_28) + stw 28,-16(11) +_GLOBAL(_savegpr_29) +_GLOBAL(_save32gpr_29) + stw 29,-12(11) +_GLOBAL(_savegpr_30) +_GLOBAL(_save32gpr_30) + stw 30,-8(11) +_GLOBAL(_savegpr_31) +_GLOBAL(_save32gpr_31) + stw 31,-4(11) + blr + +/* Routines for restoring integer registers, called by the compiler. */ +/* Called with r11 pointing to the stack header word of the caller of the */ +/* function, just beyond the end of the integer restore area. */ + +_GLOBAL(_restgpr_14) +_GLOBAL(_rest32gpr_14) + lwz 14,-72(11) /* restore gp registers */ +_GLOBAL(_restgpr_15) +_GLOBAL(_rest32gpr_15) + lwz 15,-68(11) +_GLOBAL(_restgpr_16) +_GLOBAL(_rest32gpr_16) + lwz 16,-64(11) +_GLOBAL(_restgpr_17) +_GLOBAL(_rest32gpr_17) + lwz 17,-60(11) +_GLOBAL(_restgpr_18) +_GLOBAL(_rest32gpr_18) + lwz 18,-56(11) +_GLOBAL(_restgpr_19) +_GLOBAL(_rest32gpr_19) + lwz 19,-52(11) +_GLOBAL(_restgpr_20) +_GLOBAL(_rest32gpr_20) + lwz 20,-48(11) +_GLOBAL(_restgpr_21) +_GLOBAL(_rest32gpr_21) + lwz 21,-44(11) +_GLOBAL(_restgpr_22) +_GLOBAL(_rest32gpr_22) + lwz 22,-40(11) +_GLOBAL(_restgpr_23) +_GLOBAL(_rest32gpr_23) + lwz 23,-36(11) +_GLOBAL(_restgpr_24) +_GLOBAL(_rest32gpr_24) + lwz 24,-32(11) +_GLOBAL(_restgpr_25) +_GLOBAL(_rest32gpr_25) + lwz 25,-28(11) +_GLOBAL(_restgpr_26) +_GLOBAL(_rest32gpr_26) + lwz 26,-24(11) +_GLOBAL(_restgpr_27) +_GLOBAL(_rest32gpr_27) + lwz 27,-20(11) +_GLOBAL(_restgpr_28) +_GLOBAL(_rest32gpr_28) + lwz 28,-16(11) +_GLOBAL(_restgpr_29) +_GLOBAL(_rest32gpr_29) + lwz 29,-12(11) +_GLOBAL(_restgpr_30) +_GLOBAL(_rest32gpr_30) + lwz 30,-8(11) +_GLOBAL(_restgpr_31) +_GLOBAL(_rest32gpr_31) + lwz 31,-4(11) + blr + +/* Routines for restoring integer registers, called by the compiler. */ +/* Called with r11 pointing to the stack header word of the caller of the */ +/* function, just beyond the end of the integer restore area. */ + +_GLOBAL(_restgpr_14_x) +_GLOBAL(_rest32gpr_14_x) + lwz 14,-72(11) /* restore gp registers */ +_GLOBAL(_restgpr_15_x) +_GLOBAL(_rest32gpr_15_x) + lwz 15,-68(11) +_GLOBAL(_restgpr_16_x) +_GLOBAL(_rest32gpr_16_x) + lwz 16,-64(11) +_GLOBAL(_restgpr_17_x) +_GLOBAL(_rest32gpr_17_x) + lwz 17,-60(11) +_GLOBAL(_restgpr_18_x) +_GLOBAL(_rest32gpr_18_x) + lwz 18,-56(11) +_GLOBAL(_restgpr_19_x) +_GLOBAL(_rest32gpr_19_x) + lwz 19,-52(11) +_GLOBAL(_restgpr_20_x) +_GLOBAL(_rest32gpr_20_x) + lwz 20,-48(11) +_GLOBAL(_restgpr_21_x) +_GLOBAL(_rest32gpr_21_x) + lwz 21,-44(11) +_GLOBAL(_restgpr_22_x) +_GLOBAL(_rest32gpr_22_x) + lwz 22,-40(11) +_GLOBAL(_restgpr_23_x) +_GLOBAL(_rest32gpr_23_x) + lwz 23,-36(11) +_GLOBAL(_restgpr_24_x) +_GLOBAL(_rest32gpr_24_x) + lwz 24,-32(11) +_GLOBAL(_restgpr_25_x) +_GLOBAL(_rest32gpr_25_x) + lwz 25,-28(11) +_GLOBAL(_restgpr_26_x) +_GLOBAL(_rest32gpr_26_x) + lwz 26,-24(11) +_GLOBAL(_restgpr_27_x) +_GLOBAL(_rest32gpr_27_x) + lwz 27,-20(11) +_GLOBAL(_restgpr_28_x) +_GLOBAL(_rest32gpr_28_x) + lwz 28,-16(11) +_GLOBAL(_restgpr_29_x) +_GLOBAL(_rest32gpr_29_x) + lwz 29,-12(11) +_GLOBAL(_restgpr_30_x) +_GLOBAL(_rest32gpr_30_x) + lwz 30,-8(11) +_GLOBAL(_restgpr_31_x) +_GLOBAL(_rest32gpr_31_x) + lwz 0,4(11) + lwz 31,-4(11) + mtlr 0 + mr 1,11 + blr + +/* This is from linux-2.6/arch/powerpc/kernel/misc_32.S + * + * This file contains miscellaneous low-level functions. + * Copyright (C) 1995-1996 Gary Thomas (g...@linuxppc.org) + * + * Largely rewritten by Cort Dougan (c...@cs.nmt.edu) + * and Paul Mackerras. + * + * kexec bits: + * Copyright (C) 2002-2003 Eric Biederman <ebied...@xmission.com> + * GameCube/ppc32 port Copyright (C) 2004 Albert Herranz + * + * 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. + * + */ + +_GLOBAL(__lshrdi3) + subfic 6,5,32 + srw 4,4,5 # LSW = count > 31 ? 0 : LSW >> count + addi 7,5,32 # could be xori, or addi with -32 + slw 6,3,6 # t1 = count > 31 ? 0 : MSW << (32-count) + srw 7,3,7 # t2 = count < 32 ? 0 : MSW >> (count-32) + or 4,4,6 # LSW |= t1 + srw 3,3,5 # MSW = MSW >> count + or 4,4,7 # LSW |= t2 + blr +#endif +#endif _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec