diff options
Diffstat (limited to 'elf/dl-load.c')
| -rw-r--r-- | elf/dl-load.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/elf/dl-load.c b/elf/dl-load.c index 2bbef81..5abeb86 100644 --- a/elf/dl-load.c +++ b/elf/dl-load.c @@ -1158,6 +1158,10 @@ _dl_map_object_from_fd (const char *name, const char *origname, int fd, goto call_lose; } + /* dlopen of an executable is not valid because it is not possible + to perform proper relocations, handle static TLS, or run the + ELF constructors. For PIE, the check needs the dynamic + section, so there is another check below. */ if (__glibc_unlikely (type != ET_DYN) && __glibc_unlikely ((mode & __RTLD_OPENEXEC) == 0)) { @@ -1194,9 +1198,11 @@ _dl_map_object_from_fd (const char *name, const char *origname, int fd, elf_get_dynamic_info (l, NULL); /* Make sure we are not dlopen'ing an object that has the - DF_1_NOOPEN flag set. */ - if (__glibc_unlikely (l->l_flags_1 & DF_1_NOOPEN) - && (mode & __RTLD_DLOPEN)) + DF_1_NOOPEN flag set, or a PIE object. */ + if ((__glibc_unlikely (l->l_flags_1 & DF_1_NOOPEN) + && (mode & __RTLD_DLOPEN)) + || (__glibc_unlikely (l->l_flags_1 & DF_1_PIE) + && __glibc_unlikely ((mode & __RTLD_OPENEXEC) == 0))) { /* We are not supposed to load this object. Free all resources. */ _dl_unmap_segments (l); @@ -1207,7 +1213,11 @@ _dl_map_object_from_fd (const char *name, const char *origname, int fd, if (l->l_phdr_allocated) free ((void *) l->l_phdr); - errstring = N_("shared object cannot be dlopen()ed"); + if (l->l_flags_1 & DF_1_PIE) + errstring + = N_("cannot dynamically load position-independent executable"); + else + errstring = N_("shared object cannot be dlopen()ed"); goto call_lose; } |