[PATCH 3/3] binfmt_elf_fdpic: Wire up AT_EXECFD, AT_EXECFN, AT_SECURE.

Paul Mundt
2008-07-28T15:05:21Z

These auxvec entries are the only ones left unhandled out of the current
base implementation. This syncs up binfmt_elf_fdpic with linux/auxvec.h
and current binfmt_elf.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

---

fs/binfmt_elf_fdpic.c | 14 +++++++++++++-
1 files changed, 13 insertions(+), 1 deletions(-)

diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index bc64f5f..f0dd83c 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -25,6 +25,7 @@
#include <linux/fcntl.h>
#include <linux/slab.h>
#include <linux/pagemap.h>
+#include <linux/security.h>
#include <linux/highmem.h>
#include <linux/highuid.h>
#include <linux/personality.h>
@@ -562,11 +563,14 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
}

/* force 16 byte _final_ alignment here for generality */
-#define DLINFO_ITEMS 13
+#define DLINFO_ITEMS 15

nitems = 1 + DLINFO_ITEMS + (k_platform ? 1 : 0) + \
(k_base_platform ? 1 : 0) + AT_VECTOR_SIZE_ARCH;

+ if (bprm->interp_flags & BINPRM_FLAGS_EXECFD)
+ nitems++;
+
csp = sp;
sp -= nitems * 2 * sizeof(unsigned long);
sp -= (bprm->envc + 1) * sizeof(char *); /* envv[] */
@@ -604,6 +608,12 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
(elf_addr_t) (unsigned long) u_base_platform);
}

+ if (bprm->interp_flags & BINPRM_FLAGS_EXECFD) {
+ nr = 0;
+ csp -= 2 * sizeof(unsigned long);
+ NEW_AUX_ENT(AT_EXECFD, bprm->interp_data);
+ }
+
nr = 0;
csp -= DLINFO_ITEMS * 2 * sizeof(unsigned long);
NEW_AUX_ENT(AT_HWCAP, hwcap);
@@ -619,6 +629,8 @@ static int create_elf_fdpic_tables(struct linux_binprm *bprm,
NEW_AUX_ENT(AT_EUID, (elf_addr_t) current->euid);
NEW_AUX_ENT(AT_GID, (elf_addr_t) current->gid);
NEW_AUX_ENT(AT_EGID, (elf_addr_t) current->egid);
+ NEW_AUX_ENT(AT_SECURE, security_bprm_secureexec(bprm));
+ NEW_AUX_ENT(AT_EXECFN, bprm->exec);

#ifdef ARCH_DLINFO
nr = 0;