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| author | Cyrill Gorcunov <gorcunov@gmail.com> | 2008-04-29 01:01:18 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-29 08:06:16 -0700 |
| commit | 6970c8eff85dd450e7eff69dad710dcf594b1bb8 (patch) | |
| tree | 1cba97d1f307fbceecbda22ba36e3d565430c3ba | |
| parent | eb6900fbfa43cb50391b80b38608e25280705693 (diff) | |
| download | linux-stable-6970c8eff85dd450e7eff69dad710dcf594b1bb8.tar.gz linux-stable-6970c8eff85dd450e7eff69dad710dcf594b1bb8.tar.bz2 linux-stable-6970c8eff85dd450e7eff69dad710dcf594b1bb8.zip | |
BINFMT: fill_elf_header cleanup - use straight memset first
This patch does simplify fill_elf_header function by setting
to zero the whole elf header first. So we fillup the fields
we really need only.
before:
text data bss dec hex filename
11735 80 0 11815 2e27 fs/binfmt_elf.o
after:
text data bss dec hex filename
11710 80 0 11790 2e0e fs/binfmt_elf.o
viola, 25 bytes of text is freed
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/binfmt_elf.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 9924581df6f6..6cb4efbae885 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -1255,26 +1255,23 @@ static int writenote(struct memelfnote *men, struct file *file, static void fill_elf_header(struct elfhdr *elf, int segs, u16 machine, u32 flags, u8 osabi) { + memset(elf, 0, sizeof(*elf)); + memcpy(elf->e_ident, ELFMAG, SELFMAG); elf->e_ident[EI_CLASS] = ELF_CLASS; elf->e_ident[EI_DATA] = ELF_DATA; elf->e_ident[EI_VERSION] = EV_CURRENT; elf->e_ident[EI_OSABI] = ELF_OSABI; - memset(elf->e_ident+EI_PAD, 0, EI_NIDENT-EI_PAD); elf->e_type = ET_CORE; elf->e_machine = machine; elf->e_version = EV_CURRENT; - elf->e_entry = 0; elf->e_phoff = sizeof(struct elfhdr); - elf->e_shoff = 0; elf->e_flags = flags; elf->e_ehsize = sizeof(struct elfhdr); elf->e_phentsize = sizeof(struct elf_phdr); elf->e_phnum = segs; - elf->e_shentsize = 0; - elf->e_shnum = 0; - elf->e_shstrndx = 0; + return; } |