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elf coredump: replace ELF_CORE_EXTRA_* macros by functions

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elf_core_dump() and elf_fdpic_core_dump() use #ifdef and the corresponding
macro for hiding _multiline_ logics in functions.  This patch removes
#ifdef and replaces ELF_CORE_EXTRA_* by corresponding functions.  For
architectures not implemeonting ELF_CORE_EXTRA_*, we use weak functions in
order to reduce a range of modification.

This cleanup is for my next patches, but I think this cleanup itself is
worth doing regardless of my firnal purpose.

Signed-off-by: Daisuke HATAYAMA <d.hatayama@jp.fujitsu.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Greg Ungerer <gerg@snapgear.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Daisuke HATAYAMA 2010-03-05 13:44:07 -08:00 • committed by Linus Torvalds
parent 088e7af73a
commit 1fcccbac89
13 changed files with 191 additions and 109 deletions
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16
include/linux/elfcore.h
View file

@ -8,6 +8,8 @@
#include <linux/user.h>
#endif
#include <linux/ptrace.h>
#include <linux/elf.h>
#include <linux/fs.h>
struct elf_siginfo
{
@ -150,5 +152,19 @@ static inline int elf_core_copy_task_xfpregs(struct task_struct *t, elf_fpxregse
#endif /* __KERNEL__ */
/*
* These functions parameterize elf_core_dump in fs/binfmt_elf.c to write out
* extra segments containing the gate DSO contents. Dumping its
* contents makes post-mortem fully interpretable later without matching up
* the same kernel and hardware config to see what PC values meant.
* Dumping its extra ELF program headers includes all the other information
* a debugger needs to easily find how the gate DSO was being used.
*/
extern Elf_Half elf_core_extra_phdrs(void);
extern int
elf_core_write_extra_phdrs(struct file *file, loff_t offset, size_t *size,
unsigned long limit);
extern int
elf_core_write_extra_data(struct file *file, size_t *size, unsigned long limit);
#endif /* _LINUX_ELFCORE_H */