diff options
Diffstat (limited to 'elf')
| -rw-r--r-- | elf/Makefile | 5 | ||||
| -rw-r--r-- | elf/dl-load.c | 2 | ||||
| -rw-r--r-- | elf/dl-support.c | 3 | ||||
| -rw-r--r-- | elf/rtld.c | 49 |
4 files changed, 27 insertions, 32 deletions
diff --git a/elf/Makefile b/elf/Makefile index 44c510a..a19a8b4 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -21,14 +21,15 @@ subdir := elf headers = elf.h elfclass.h link.h dlfcn.h -routines = $(dl-routines) dl-open dl-close dl-symbol dl-support +routines = $(dl-routines) dl-open dl-close dl-symbol dl-support \ + enbl-secure # The core dynamic linking functions are in libc for the static and # profiled libraries. dl-routines = $(addprefix dl-,load cache lookup object reloc deps \ runtime error init fini debug) # But they are absent from the shared libc, because that code is in ld.so. -elide-routines.so = $(dl-routines) dl-support +elide-routines.so = $(dl-routines) dl-support enbl-secure # ld.so uses those routines, plus some special stuff for being the program # interpreter and operating independent of libc. diff --git a/elf/dl-load.c b/elf/dl-load.c index fc27332..8ccc838 100644 --- a/elf/dl-load.c +++ b/elf/dl-load.c @@ -511,7 +511,7 @@ _dl_map_object (struct link_map *loader, const char *name, int type) l->l_info[DT_STRTAB]->d_un.d_ptr + l->l_info[DT_RPATH]->d_un.d_val)); /* Try an environment variable (unless setuid). */ - if (fd == -1 && ! _dl_secure) + if (fd == -1 && ! __libc_enable_secure) trypath (getenv ("LD_LIBRARY_PATH")); if (fd == -1) { diff --git a/elf/dl-support.c b/elf/dl-support.c index b85d470..50ebfbf 100644 --- a/elf/dl-support.c +++ b/elf/dl-support.c @@ -24,8 +24,6 @@ Cambridge, MA 02139, USA. */ /* This file defines some things that for the dynamic linker are defined in rtld.c and dl-sysdep.c in ways appropriate to bootstrap dynamic linking. */ -int _dl_secure; /* Always honor LD_LIBRARY_PATH. */ - extern char *__progname; char **_dl_argv = &__progname; /* This is checked for some error messages. */ @@ -48,4 +46,3 @@ _dl_sysdep_fatal (void) { assert (! "_dl_sysdep_fatal called"); } - @@ -30,7 +30,7 @@ Cambridge, MA 02139, USA. */ /* System-specific function to do initial startup for the dynamic linker. After this, file access calls and getenv must work. This is responsible - for setting _dl_secure if we need to be secure (e.g. setuid), + for setting __libc_enable_secure if we need to be secure (e.g. setuid), and for setting _dl_argc and _dl_argv, and then calling _dl_main. */ extern ElfW(Addr) _dl_sysdep_start (void **start_argptr, void (*dl_main) (const ElfW(Phdr) *phdr, @@ -38,7 +38,6 @@ extern ElfW(Addr) _dl_sysdep_start (void **start_argptr, ElfW(Addr) *user_entry)); extern void _dl_sysdep_start_cleanup (void); -int _dl_secure; int _dl_argc; char **_dl_argv; const char *_dl_rpath; @@ -269,7 +268,7 @@ of this helper program; chances are you did not intend to run this program.\n", preloads = NULL; npreloads = 0; - if (! _dl_secure) + if (! __libc_enable_secure) { const char *preloadlist = getenv ("LD_PRELOAD"); if (preloadlist) @@ -340,10 +339,7 @@ of this helper program; chances are you did not intend to run this program.\n", } } - if (mode == normal && getenv ("LD_TRACE_LOADED_OBJECTS") != NULL) - mode = list; - - if (mode != normal) + if (mode != normal || getenv ("LD_TRACE_LOADED_OBJECTS") != NULL) { /* We were run just to list the shared libraries. It is important that we do this before real relocation, because the @@ -366,29 +362,30 @@ of this helper program; chances are you did not intend to run this program.\n", " (0x", bp, ")\n", NULL); } - for (i = 1; i < _dl_argc; ++i) - { - const ElfW(Sym) *ref = NULL; - ElfW(Addr) loadbase = _dl_lookup_symbol (_dl_argv[i], &ref, - &_dl_default_scope[2], - "argument", 0, 0); - char buf[20], *bp; - buf[sizeof buf - 1] = '\0'; - bp = _itoa (ref->st_value, &buf[sizeof buf - 1], 16, 0); - while (&buf[sizeof buf - 1] - bp < sizeof loadbase * 2) - *--bp = '0'; - _dl_sysdep_message (_dl_argv[i], " found at 0x", bp, NULL); - buf[sizeof buf - 1] = '\0'; - bp = _itoa (loadbase, &buf[sizeof buf - 1], 16, 0); - while (&buf[sizeof buf - 1] - bp < sizeof loadbase * 2) - *--bp = '0'; - _dl_sysdep_message (" in object at 0x", bp, "\n", NULL); - } + if (mode != normal) + for (i = 1; i < _dl_argc; ++i) + { + const ElfW(Sym) *ref = NULL; + ElfW(Addr) loadbase = _dl_lookup_symbol (_dl_argv[i], &ref, + &_dl_default_scope[2], + "argument", 0, 0); + char buf[20], *bp; + buf[sizeof buf - 1] = '\0'; + bp = _itoa (ref->st_value, &buf[sizeof buf - 1], 16, 0); + while (&buf[sizeof buf - 1] - bp < sizeof loadbase * 2) + *--bp = '0'; + _dl_sysdep_message (_dl_argv[i], " found at 0x", bp, NULL); + buf[sizeof buf - 1] = '\0'; + bp = _itoa (loadbase, &buf[sizeof buf - 1], 16, 0); + while (&buf[sizeof buf - 1] - bp < sizeof loadbase * 2) + *--bp = '0'; + _dl_sysdep_message (" in object at 0x", bp, "\n", NULL); + } _exit (0); } - lazy = !_dl_secure && *(getenv ("LD_BIND_NOW") ?: "") == '\0'; + lazy = !__libc_enable_secure && *(getenv ("LD_BIND_NOW") ?: "") == '\0'; { /* Now we have all the objects loaded. Relocate them all except for |