Messages in this thread Patch in this message | | | Subject | [PATCH 19/19] Compat ELF class core generation support | From | Janani Venkataraman <> | Date | Fri, 04 Oct 2013 16:03:22 +0530 |
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From:Suzuki K. Poulose <suzuki@in.ibm.com>
Add full support for the compat ELF class objects. The gencore-compat-elf.c reuses the gencore-elf.c, by renaming the ABI structures and functions. (Inspired by compat_binfmt_elf.c)
Signed-off-by: Suzuki K. Poulose <suzuki@in.ibm.com> --- fs/proc/Makefile | 1 + fs/proc/gencore-compat-elf.c | 62 ++++++++++++++++++++++++++++++++++++++++++ fs/proc/gencore.c | 4 +++ fs/proc/gencore.h | 5 +++ 4 files changed, 72 insertions(+) create mode 100644 fs/proc/gencore-compat-elf.c
diff --git a/fs/proc/Makefile b/fs/proc/Makefile index d231ac3..d8e17f2 100644 --- a/fs/proc/Makefile +++ b/fs/proc/Makefile @@ -24,6 +24,7 @@ proc-y += softirqs.o proc-y += namespaces.o proc-y += self.o proc-$(CONFIG_ELF_CORE) += gencore.o gencore-elf.o +proc-$(CONFIG_COMPAT_BINFMT_ELF) += gencore-compat-elf.o proc-$(CONFIG_PROC_SYSCTL) += proc_sysctl.o proc-$(CONFIG_NET) += proc_net.o proc-$(CONFIG_PROC_KCORE) += kcore.o diff --git a/fs/proc/gencore-compat-elf.c b/fs/proc/gencore-compat-elf.c new file mode 100644 index 0000000..8fd11be --- /dev/null +++ b/fs/proc/gencore-compat-elf.c @@ -0,0 +1,62 @@ +/* + * Application core dump - compat ELF Class specific code + * + * 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. + * This program 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; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 2111-1307, USA. + * + * Copyright (C) IBM Corporation, 2010 + * + * We use macros to rename the types and functions in gencore-elf.c o + * the compat versions + * + */ + +#include <linux/elfcore-compat.h> +#include "gencore.h" + +#undef elfhdr +#undef elf_phdr +#undef elf_shdr +#undef elf_note +#undef elf_addr_t +#define elfhdr elf32_hdr +#define elf_phdr elf32_phdr +#define elf_shdr elf32_shdr +#define elf_note elf32_note +#define elf_addr_t Elf32_Addr + +#undef ELF_CLASS +#define ELF_CLASS ELF_CASS32 + +#define elf_prstatus compat_elf_prstatus +#define elf_prpsinfo compat_elf_prpsinfo + +/* Functions used from binfmt_elf core code */ +#define fill_psinfo compat_fill_psinfo +#define fill_prstatus compat_fill_prstatus +#define fill_extnum_info compat_fill_extnum_info +#define fill_auxv_note compat_fill_auxv_note +#define fill_elf_header compat_fill_elf_header + +/* + * Define the fileds in elf_thread_core_info and core_proc + * for compat ELF class + */ +#define et_prstatus u.compat_prstatus +#define cp_prpsinfo u.compat_prpsinfo + +/* Rename the core function to compat_ */ +#define elf_read_gencore compat_elf_read_gencore + +#include "gencore-elf.c" + diff --git a/fs/proc/gencore.c b/fs/proc/gencore.c index 3e0db30..92be778 100644 --- a/fs/proc/gencore.c +++ b/fs/proc/gencore.c @@ -66,6 +66,10 @@ static ssize_t read_gencore(struct file *file, char __user *buffer, if (cp->elf_class == ELF_CLASS_NATIVE) ret = elf_read_gencore(cp, buffer, buflen, fpos); +#ifdef CONFIG_COMPAT_BINFMT_ELF + else if (cp->elf_class == ELF_CLASS_COMPAT) + ret = compat_elf_read_gencore(cp, buffer, buflen, fpos); +#endif out: put_task_struct(task); diff --git a/fs/proc/gencore.h b/fs/proc/gencore.h index 60972a2..840863b 100644 --- a/fs/proc/gencore.h +++ b/fs/proc/gencore.h @@ -66,4 +66,9 @@ static inline int get_max_regsets(struct task_struct *task) extern ssize_t elf_read_gencore(struct core_proc *cp, char __user *buffer, size_t buflen, loff_t *foffset); +#ifdef CONFIG_COMPAT_BINFMT_ELF +extern ssize_t compat_elf_read_gencore(struct core_proc *cp, char __user *buffer, + size_t buflen, loff_t *foffset); +#endif + #endif
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