diff options
| author | Roland McGrath <roland@gnu.org> | 2003-06-26 19:54:29 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 2003-06-26 19:54:29 +0000 |
| commit | c801e76565467d2819ab0839804463f635d78b25 (patch) | |
| tree | 6a28ae9f37029e767c292ed0763b5ee758e14fb7 /sysdeps/generic/dl-sysdep.c | |
| parent | 95a305bec37e831bc683cac8f62ca365bdb42d39 (diff) | |
2003-06-26 Roland McGrath <roland@redhat.com>
* elf/elf.h (AT_SECURE): New macro.
* sysdeps/generic/dl-sysdep.c (_dl_sysdep_start): Grok it,
set __libc_enable_secure.
(_dl_show_auxv): Add AT_SECURE to name table.
* elf/dl-support.c (_dl_aux_init): Grok AT_SECURE, set
__libc_enable_secure and __libc_enable_secure_decided.
* sysdeps/unix/sysv/linux/ldsodefs.h
[__ASSUME_AT_SECURE] (HAVE_AUX_SECURE): Define it.
* sysdeps/unix/sysv/linux/kernel-features.h
[__LINUX_KERNEL_VERSION >= 132425] (__ASSUME_AT_SECURE): Define it.
Diffstat (limited to 'sysdeps/generic/dl-sysdep.c')
| -rw-r--r-- | sysdeps/generic/dl-sysdep.c | 49 |
1 files changed, 32 insertions, 17 deletions
diff --git a/sysdeps/generic/dl-sysdep.c b/sysdeps/generic/dl-sysdep.c index 278289e827..7990f31fdc 100644 --- a/sysdeps/generic/dl-sysdep.c +++ b/sysdeps/generic/dl-sysdep.c @@ -79,14 +79,19 @@ _dl_sysdep_start (void **start_argptr, ElfW(Word) phnum = 0; ElfW(Addr) user_entry; ElfW(auxv_t) *av; +#ifdef HAVE_AUX_SECURE +# define set_seen_secure() ((void) 0) +#else uid_t uid = 0; gid_t gid = 0; -#ifdef HAVE_AUX_XID -# define set_seen(tag) (tag) /* Evaluate for the side effects. */ -#else unsigned int seen = 0; -# define M(type) (1 << (type)) -# define set_seen(tag) seen |= M ((tag)->a_type) +# define set_seen_secure() (seen = -1) +# ifdef HAVE_AUX_XID +# define set_seen(tag) (tag) /* Evaluate for the side effects. */ +# else +# define M(type) (1 << (type)) +# define set_seen(tag) seen |= M ((tag)->a_type) +# endif #endif DL_FIND_ARG_COMPONENTS (start_argptr, _dl_argc, INTUSE(_dl_argv), _environ, @@ -123,6 +128,10 @@ _dl_sysdep_start (void **start_argptr, case AT_EGID: gid ^= av->a_un.a_val; break; + case AT_SECURE: + seen = -1; + INTUSE(__libc_enable_secure) = av->a_un.a_val; + break; case AT_PLATFORM: GL(dl_platform) = av->a_un.a_ptr; break; @@ -152,21 +161,26 @@ _dl_sysdep_start (void **start_argptr, DL_SYSDEP_OSCHECK (dl_fatal); #endif - /* Fill in the values we have not gotten from the kernel through the - auxiliary vector. */ -#ifndef HAVE_AUX_XID +#ifndef HAVE_AUX_SECURE + if (seen != -1) + { + /* Fill in the values we have not gotten from the kernel through the + auxiliary vector. */ +# ifndef HAVE_AUX_XID # define SEE(UID, var, uid) \ if ((seen & M (AT_##UID)) == 0) var ^= __get##uid () - SEE (UID, uid, uid); - SEE (EUID, uid, euid); - SEE (GID, gid, gid); - SEE (EGID, gid, egid); + SEE (UID, uid, uid); + SEE (EUID, uid, euid); + SEE (GID, gid, gid); + SEE (EGID, gid, egid); +# endif + + /* If one of the two pairs of IDs does not match this is a setuid + or setgid run. */ + INTUSE(__libc_enable_secure) = uid | gid; + } #endif - /* If one of the two pairs of IDs does not match this is a setuid - or setgid run. */ - INTUSE(__libc_enable_secure) = uid | gid; - #ifndef HAVE_AUX_PAGESIZE if (GL(dl_pagesize) == 0) GL(dl_pagesize) = __getpagesize (); @@ -253,8 +267,9 @@ _dl_show_auxv (void) [AT_UCACHEBSIZE - 2] = { "AT_UCACHEBSIZE: 0x", hex }, #ifdef NEED_DL_SYSINFO [AT_SYSINFO - 2] = { "AT_SYSINFO: 0x", hex }, - [AT_SYSINFO_EHDR - 2] = { "AT_SYSINFO_EHDR: 0x", hex } + [AT_SYSINFO_EHDR - 2] = { "AT_SYSINFO_EHDR: 0x", hex }, #endif + [AT_SECURE - 2] = { "AT_SECURE: ", dec }, }; unsigned int idx = (unsigned int) (av->a_type - 2); |