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mm: introduce coredump parameter structure

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Introduce coredump parameter data structure (struct coredump_params) to
simplify binfmt->core_dump() arguments.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Suggested-by: Ingo Molnar <mingo@elte.hu>
Cc: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Masami Hiramatsu 2009-12-17 15:27:16 -08:00 • committed by Linus Torvalds
parent 9cd80bbb07
commit f6151dfea2
7 changed files with 69 additions and 53 deletions
Download patch file Download diff file Expand all files Collapse all files

24
fs/binfmt_elf.c
View file

@ -45,7 +45,7 @@ static unsigned long elf_map(struct file *, unsigned long, struct elf_phdr *,
* don't even try.
*/
#ifdef CONFIG_ELF_CORE
static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file, unsigned long limit);
static int elf_core_dump(struct coredump_params *cprm);
#else
#define elf_core_dump NULL
#endif
@ -1272,8 +1272,9 @@ static int writenote(struct memelfnote *men, struct file *file,
}
#undef DUMP_WRITE
#define DUMP_WRITE(addr, nr) \
if ((size += (nr)) > limit || !dump_write(file, (addr), (nr))) \
#define DUMP_WRITE(addr, nr) \
if ((size += (nr)) > cprm->limit || \
!dump_write(cprm->file, (addr), (nr))) \
goto end_coredump;
static void fill_elf_header(struct elfhdr *elf, int segs,
@ -1901,7 +1902,7 @@ static struct vm_area_struct *next_vma(struct vm_area_struct *this_vma,
* and then they are actually written out. If we run out of core limit
* we just truncate.
*/
static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file, unsigned long limit)
static int elf_core_dump(struct coredump_params *cprm)
{
int has_dumped = 0;
mm_segment_t fs;
@ -1947,7 +1948,7 @@ static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file, un
* notes. This also sets up the file header.
*/
if (!fill_note_info(elf, segs + 1, /* including notes section */
&info, signr, regs))
&info, cprm->signr, cprm->regs))
goto cleanup;
has_dumped = 1;
@ -2009,14 +2010,14 @@ static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file, un
#endif
/* write out the notes section */
if (!write_note_info(&info, file, &foffset))
if (!write_note_info(&info, cprm->file, &foffset))
goto end_coredump;
if (elf_coredump_extra_notes_write(file, &foffset))
if (elf_coredump_extra_notes_write(cprm->file, &foffset))
goto end_coredump;
/* Align to page */
if (!dump_seek(file, dataoff - foffset))
if (!dump_seek(cprm->file, dataoff - foffset))
goto end_coredump;
for (vma = first_vma(current, gate_vma); vma != NULL;
@ -2033,12 +2034,13 @@ static int elf_core_dump(long signr, struct pt_regs *regs, struct file *file, un
page = get_dump_page(addr);
if (page) {
void *kaddr = kmap(page);
stop = ((size += PAGE_SIZE) > limit) ||
!dump_write(file, kaddr, PAGE_SIZE);
stop = ((size += PAGE_SIZE) > cprm->limit) ||
!dump_write(cprm->file, kaddr,
PAGE_SIZE);
kunmap(page);
page_cache_release(page);
} else
stop = !dump_seek(file, PAGE_SIZE);
stop = !dump_seek(cprm->file, PAGE_SIZE);
if (stop)
goto end_coredump;
}