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088e7af73a
My next patch will replace ELF_CORE_EXTRA_* macros by functions, putting them into other newly created *.c files. Then, each files will contain dump_write(), where each pair of binfmt_*.c and elfcore.c should be the same. So, this patch moves them into a header file with dump_seek(). Also, the patch deletes confusing DUMP_WRITE macros in each files. 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>
41 lines
904 B
C
41 lines
904 B
C
#ifndef _LINUX_COREDUMP_H
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#define _LINUX_COREDUMP_H
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#include <linux/types.h>
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#include <linux/mm.h>
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#include <linux/fs.h>
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/*
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* These are the only things you should do on a core-file: use only these
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* functions to write out all the necessary info.
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*/
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static inline int dump_write(struct file *file, const void *addr, int nr)
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{
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return file->f_op->write(file, addr, nr, &file->f_pos) == nr;
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}
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static inline int dump_seek(struct file *file, loff_t off)
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{
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if (file->f_op->llseek && file->f_op->llseek != no_llseek) {
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if (file->f_op->llseek(file, off, SEEK_CUR) < 0)
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return 0;
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} else {
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char *buf = (char *)get_zeroed_page(GFP_KERNEL);
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if (!buf)
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return 0;
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while (off > 0) {
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unsigned long n = off;
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if (n > PAGE_SIZE)
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n = PAGE_SIZE;
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if (!dump_write(file, buf, n))
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return 0;
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off -= n;
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}
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free_page((unsigned long)buf);
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}
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return 1;
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}
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#endif /* _LINUX_COREDUMP_H */
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