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-rw-r--r--libc/misc/internals/__uClibc_main.c22
1 files changed, 16 insertions, 6 deletions
diff --git a/libc/misc/internals/__uClibc_main.c b/libc/misc/internals/__uClibc_main.c
index 8a3646cde..a37751f2d 100644
--- a/libc/misc/internals/__uClibc_main.c
+++ b/libc/misc/internals/__uClibc_main.c
@@ -140,6 +140,11 @@ extern void (*__fini_array_end []) (void) attribute_hidden;
# endif
#endif
+#ifdef SHARED
+extern int _dl_secure;
+#endif
+extern size_t _dl_pagesize;
+
const char *__uclibc_progname = "";
#if !defined __UCLIBC_HAS___PROGNAME__ && defined __USE_GNU && defined __UCLIBC_HAS_PROGRAM_INVOCATION_NAME__
# define __progname program_invocation_short_name
@@ -186,6 +191,7 @@ static void __check_one_fd(int fd, int mode)
}
}
+#ifndef SHARED
static int __check_suid(void)
{
uid_t uid, euid;
@@ -202,6 +208,7 @@ static int __check_suid(void)
return 0; /* we are not suid */
}
#endif
+#endif
/* __uClibc_init completely initialize uClibc so it is ready to use.
*
@@ -313,7 +320,7 @@ void __uClibc_main(int (*main)(int, char **, char **), int argc,
char **argv, void (*app_init)(void), void (*app_fini)(void),
void (*rtld_fini)(void), void *stack_end attribute_unused)
{
-#ifndef __ARCH_HAS_NO_LDSO__
+#if !defined __ARCH_HAS_NO_LDSO__ && !defined SHARED
unsigned long *aux_dat;
ElfW(auxv_t) auxvt[AT_EGID + 1];
#endif
@@ -339,7 +346,7 @@ void __uClibc_main(int (*main)(int, char **, char **), int argc,
__environ = &argv[argc];
}
-#ifndef __ARCH_HAS_NO_LDSO__
+#if !defined __ARCH_HAS_NO_LDSO__ && !defined SHARED
/* Pull stuff from the ELF header when possible */
memset(auxvt, 0x00, sizeof(auxvt));
aux_dat = (unsigned long*)__environ;
@@ -354,13 +361,11 @@ void __uClibc_main(int (*main)(int, char **, char **), int argc,
}
aux_dat += 2;
}
-#ifndef SHARED
/* Get the program headers (_dl_phdr) from the aux vector
It will be used into __libc_setup_tls. */
_dl_aux_init (auxvt);
#endif
-#endif
/* We need to initialize uClibc. If we are dynamically linked this
* may have already been completed by the shared lib loader. We call
@@ -368,15 +373,20 @@ void __uClibc_main(int (*main)(int, char **, char **), int argc,
__uClibc_init();
#ifndef __ARCH_HAS_NO_LDSO__
- /* Make certain getpagesize() gives the correct answer */
- __pagesize = (auxvt[AT_PAGESZ].a_un.a_val)? auxvt[AT_PAGESZ].a_un.a_val : PAGE_SIZE;
+ /* Make certain getpagesize() gives the correct answer.
+ * _dl_pagesize is defined into ld.so if SHARED or into libc.a otherwise. */
+ __pagesize = _dl_pagesize;
+#ifndef SHARED
/* Prevent starting SUID binaries where the stdin. stdout, and
* stderr file descriptors are not already opened. */
if ((auxvt[AT_UID].a_un.a_val == (size_t)-1 && __check_suid()) ||
(auxvt[AT_UID].a_un.a_val != (size_t)-1 &&
(auxvt[AT_UID].a_un.a_val != auxvt[AT_EUID].a_un.a_val ||
auxvt[AT_GID].a_un.a_val != auxvt[AT_EGID].a_un.a_val)))
+#else
+ if (_dl_secure)
+#endif
{
__check_one_fd (STDIN_FILENO, O_RDONLY | O_NOFOLLOW);
__check_one_fd (STDOUT_FILENO, O_RDWR | O_NOFOLLOW);