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coredump: move dump_write() and dump_seek() into a header file

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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>
This commit is contained in:
Daisuke HATAYAMA
2010-03-05 13:44:06 -08:00
committed by Linus Torvalds
parent 05f47fda9f
commit 088e7af73a
4 changed files with 79 additions and 117 deletions
Download Patch File Download Diff File Expand all files Collapse all files

49
fs/binfmt_aout.c
View File

@@ -24,6 +24,7 @@
#include <linux/binfmts.h>
#include <linux/personality.h>
#include <linux/init.h>
#include <linux/coredump.h>
#include <asm/system.h>
#include <asm/uaccess.h>
@@ -59,42 +60,6 @@ static int set_brk(unsigned long start, unsigned long end)
return 0;
}
/*
* These are the only things you should do on a core-file: use only these
* macros to write out all the necessary info.
*/
static int dump_write(struct file *file, const void *addr, int nr)
{
return file->f_op->write(file, addr, nr, &file->f_pos) == nr;
}
static int dump_seek(struct file *file, loff_t off)
{
if (file->f_op->llseek && file->f_op->llseek != no_llseek) {
if (file->f_op->llseek(file, off, SEEK_CUR) < 0)
return 0;
} else {
char *buf = (char *)get_zeroed_page(GFP_KERNEL);
if (!buf)
return 0;
while (off > 0) {
unsigned long n = off;
if (n > PAGE_SIZE)
n = PAGE_SIZE;
if (!dump_write(file, buf, n))
return 0;
off -= n;
}
free_page((unsigned long)buf);
}
return 1;
}
#define DUMP_WRITE(addr, nr) \
if (!dump_write(file, (void *)(addr), (nr))) \
goto end_coredump;
/*
* Routine writes a core dump image in the current directory.
* Currently only a stub-function.
@@ -146,7 +111,8 @@ static int aout_core_dump(struct coredump_params *cprm)
set_fs(KERNEL_DS);
/* struct user */
DUMP_WRITE(&dump,sizeof(dump));
if (!dump_write(file, &dump, sizeof(dump)))
goto end_coredump;
/* Now dump all of the user data. Include malloced stuff as well */
if (!dump_seek(cprm->file, PAGE_SIZE - sizeof(dump)))
goto end_coredump;
@@ -156,17 +122,20 @@ static int aout_core_dump(struct coredump_params *cprm)
if (dump.u_dsize != 0) {
dump_start = START_DATA(dump);
dump_size = dump.u_dsize << PAGE_SHIFT;
DUMP_WRITE(dump_start,dump_size);
if (!dump_write(file, dump_start, dump_size))
goto end_coredump;
}
/* Now prepare to dump the stack area */
if (dump.u_ssize != 0) {
dump_start = START_STACK(dump);
dump_size = dump.u_ssize << PAGE_SHIFT;
DUMP_WRITE(dump_start,dump_size);
if (!dump_write(file, dump_start, dump_size))
goto end_coredump;
}
/* Finally dump the task struct. Not be used by gdb, but could be useful */
set_fs(KERNEL_DS);
DUMP_WRITE(current,sizeof(*current));
if (!dump_write(file, current, sizeof(*current)))
goto end_coredump;
end_coredump:
set_fs(fs);
return has_dumped;