new helper: dump_align()
dump_skip to given alignment...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/powerpc/platforms/cell/spufs/coredump.c b/arch/powerpc/platforms/cell/spufs/coredump.c
index 1aaaa58..be6212d 100644
--- a/arch/powerpc/platforms/cell/spufs/coredump.c
+++ b/arch/powerpc/platforms/cell/spufs/coredump.c
@@ -156,7 +156,7 @@
if (!dump_emit(cprm, fullname, en.n_namesz))
goto Eio;
- if (!dump_skip(cprm, roundup(cprm->written, 4) - cprm->written))
+ if (!dump_align(cprm, 4))
goto Eio;
do {
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index c56ae32..8641549 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -1225,12 +1225,6 @@
return sz;
}
-static int alignfile(struct coredump_params *cprm)
-{
- static const char buf[4] = { 0, };
- return dump_emit(cprm, buf, roundup(cprm->written, 4) - cprm->written);
-}
-
static int writenote(struct memelfnote *men, struct coredump_params *cprm)
{
struct elf_note en;
@@ -1239,8 +1233,8 @@
en.n_type = men->type;
return dump_emit(cprm, &en, sizeof(en)) &&
- dump_emit(cprm, men->name, en.n_namesz) && alignfile(cprm) &&
- dump_emit(cprm, men->data, men->datasz) && alignfile(cprm);
+ dump_emit(cprm, men->name, en.n_namesz) && dump_align(cprm, 4) &&
+ dump_emit(cprm, men->data, men->datasz) && dump_align(cprm, 4);
}
static void fill_elf_header(struct elfhdr *elf, int segs,
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index a69fc4a..645f6e5 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -1267,12 +1267,6 @@
/* #define DEBUG */
-static int alignfile(struct coredump_params *cprm)
-{
- static const char buf[4] = { 0, };
- return dump_emit(cprm, buf, roundup(cprm->written, 4) - cprm->written);
-}
-
static int writenote(struct memelfnote *men, struct coredump_params *cprm)
{
struct elf_note en;
@@ -1281,8 +1275,8 @@
en.n_type = men->type;
return dump_emit(cprm, &en, sizeof(en)) &&
- dump_emit(cprm, men->name, en.n_namesz) && alignfile(cprm) &&
- dump_emit(cprm, men->data, men->datasz) && alignfile(cprm);
+ dump_emit(cprm, men->name, en.n_namesz) && dump_align(cprm, 4) &&
+ dump_emit(cprm, men->data, men->datasz) && dump_align(cprm, 4);
}
static inline void fill_elf_fdpic_header(struct elfhdr *elf, int segs)
diff --git a/fs/coredump.c b/fs/coredump.c
index 18baf2c..dc1f937 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -728,3 +728,12 @@
}
}
EXPORT_SYMBOL(dump_skip);
+
+int dump_align(struct coredump_params *cprm, int align)
+{
+ unsigned mod = cprm->written & (align - 1);
+ if (align & (align - 1))
+ return -EINVAL;
+ return mod ? dump_skip(cprm, align - mod) : 0;
+}
+EXPORT_SYMBOL(dump_align);
diff --git a/include/linux/coredump.h b/include/linux/coredump.h
index 07a0af9..d8eb880be 100644
--- a/include/linux/coredump.h
+++ b/include/linux/coredump.h
@@ -13,6 +13,7 @@
struct coredump_params;
extern int dump_skip(struct coredump_params *cprm, size_t nr);
extern int dump_emit(struct coredump_params *cprm, const void *addr, int nr);
+extern int dump_align(struct coredump_params *cprm, int align);
#ifdef CONFIG_COREDUMP
extern void do_coredump(siginfo_t *siginfo);
#else