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Message-Id: <20080102211702.D596726F9A0@magilla.localdomain>
Date: Wed, 2 Jan 2008 13:17:02 -0800 (PST)
From: Roland McGrath <roland@...hat.com>
To: Paul Mackerras <paulus@...ba.org>
Cc: linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
linuxppc-dev@...abs.org
Subject: [PATCH -mm] powerpc compat_binfmt_elf
This replaces my earlier patch of the same title, posted with:
Subject: [PATCH -mm 18/43] powerpc compat_binfmt_elf
Date: Thu, 20 Dec 2007 03:58:16 -0800 (PST)
This requires all the powerpc patches in that series from late December and
also requires the new patch I just posted, titled "compat_binfmt_elf Kconfig".
Thanks,
Roland
---
powerpc compat_binfmt_elf
This switches the CONFIG_PPC64 support for 32-bit ELF to use the generic
fs/compat_binfmt_elf.c implementation instead of our own binfmt_elf32.c.
Since so much is the same between 32/64, there is only one macro we have to
define to make the generic support work out of the box.
Signed-off-by: Roland McGrath <roland@...hat.com>
---
arch/powerpc/Kconfig | 1 +
arch/powerpc/kernel/Makefile | 2 +-
arch/powerpc/kernel/binfmt_elf32.c | 69 ------------------------------------
include/asm-powerpc/elf.h | 1 +
4 files changed, 3 insertions(+), 70 deletions(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index c17a194..0000000 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -92,6 +92,7 @@ config EARLY_PRINTK
config COMPAT
bool
default y if PPC64
+ select COMPAT_BINFMT_ELF
config SYSVIPC_COMPAT
bool
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index ca51f0c..0000000 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -15,7 +15,7 @@ obj-y := semaphore.o cputable.o ptrac
init_task.o process.o systbl.o idle.o \
signal.o
obj-y += vdso32/
-obj-$(CONFIG_PPC64) += setup_64.o binfmt_elf32.o sys_ppc32.o \
+obj-$(CONFIG_PPC64) += setup_64.o sys_ppc32.o \
signal_64.o ptrace32.o \
paca.o cpu_setup_ppc970.o \
cpu_setup_pa6t.o \
diff --git a/arch/powerpc/kernel/binfmt_elf32.c b/arch/powerpc/kernel/binfmt_elf32.c
deleted file mode 100644
index 1d45d77... .
--- a/arch/powerpc/kernel/binfmt_elf32.c
+++ /dev/null
@@ -1,69 +0,0 @@
-/*
- * binfmt_elf32.c: Support 32-bit PPC ELF binaries on Power3 and followons.
- * based on the SPARC64 version.
- * Copyright (C) 1995, 1996, 1997, 1998 David S. Miller (davem@...hat.com)
- * Copyright (C) 1995, 1996, 1997, 1998 Jakub Jelinek (jj@...ra.linux.cz)
- *
- * Copyright (C) 2000,2001 Ken Aaker (kdaaker@...land.vnet.ibm.com), IBM Corp
- * Copyright (C) 2001 Anton Blanchard (anton@...ibm.com), IBM
- *
- * 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.
- */
-
-#include <asm/processor.h>
-#include <linux/module.h>
-#include <linux/compat.h>
-#include <linux/elfcore-compat.h>
-
-#undef ELF_ARCH
-#undef ELF_CLASS
-#define ELF_CLASS ELFCLASS32
-#define ELF_ARCH EM_PPC
-
-#undef elfhdr
-#undef elf_phdr
-#undef elf_note
-#undef elf_addr_t
-#define elfhdr elf32_hdr
-#define elf_phdr elf32_phdr
-#define elf_note elf32_note
-#define elf_addr_t Elf32_Off
-
-#define elf_prstatus compat_elf_prstatus
-#define elf_prpsinfo compat_elf_prpsinfo
-
-#define elf_core_copy_regs compat_elf_core_copy_regs
-static inline void compat_elf_core_copy_regs(compat_elf_gregset_t *elf_regs,
- struct pt_regs *regs)
-{
- PPC_ELF_CORE_COPY_REGS((*elf_regs), regs);
-}
-
-#define elf_core_copy_task_regs compat_elf_core_copy_task_regs
-static int compat_elf_core_copy_task_regs(struct task_struct *tsk,
- compat_elf_gregset_t *elf_regs)
-{
- struct pt_regs *regs = tsk->thread.regs;
- if (regs)
- compat_elf_core_copy_regs(elf_regs, regs);
- return 1;
-}
-
-#include <linux/time.h>
-
-#undef cputime_to_timeval
-#define cputime_to_timeval cputime_to_compat_timeval
-static __inline__ void
-cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value)
-{
- unsigned long jiffies = cputime_to_jiffies(cputime);
- value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
- value->tv_sec = jiffies / HZ;
-}
-
-#define init_elf_binfmt init_elf32_binfmt
-
-#include "../../../fs/binfmt_elf.c"
diff --git a/include/asm-powerpc/elf.h b/include/asm-powerpc/elf.h
index 6bd07ef..0000000 100644
--- a/include/asm-powerpc/elf.h
+++ b/include/asm-powerpc/elf.h
@@ -165,6 +165,7 @@ typedef elf_vrreg_t elf_vrregset_t32[ELF
* This is used to ensure we don't load something for the wrong architecture.
*/
#define elf_check_arch(x) ((x)->e_machine == ELF_ARCH)
+#define compat_elf_check_arch(x) ((x)->e_machine == EM_PPC)
#define USE_ELF_CORE_DUMP
#define ELF_EXEC_PAGESIZE PAGE_SIZE
--
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