diff options
Diffstat (limited to 'sysdeps/generic/ldsodefs.h')
| -rw-r--r-- | sysdeps/generic/ldsodefs.h | 35 |
1 files changed, 30 insertions, 5 deletions
diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h index 5b12a41..74025f1 100644 --- a/sysdeps/generic/ldsodefs.h +++ b/sysdeps/generic/ldsodefs.h @@ -368,8 +368,6 @@ struct rtld_global size_t n_elements; void (*free) (void *); } _ns_unique_sym_table; - /* Keep track of changes to each namespace' list. */ - struct r_debug_extended _ns_debug; } _dl_ns[DL_NNS]; /* One higher than index of last used namespace. */ EXTERN size_t _dl_nns; @@ -717,10 +715,23 @@ extern const ElfW(Phdr) *_dl_phdr; extern size_t _dl_phnum; #endif +/* Possible values for the glibc.rtld.execstack tunable. */ +enum stack_tunable_mode + { + /* Do not allow executable stacks, even if program requires it. */ + stack_tunable_mode_disable = 0, + /* Follows either ABI requirement, or the PT_GNU_STACK value. */ + stack_tunable_mode_enable = 1, + /* Always enable an executable stack. */ + stack_tunable_mode_force = 2 + }; + +void _dl_handle_execstack_tunable (void) attribute_hidden; + /* This function changes the permission of the memory region pointed by STACK_ENDP to executable and update the internal memory protection flags for future thread stack creation. */ -int _dl_make_stack_executable (void **stack_endp) attribute_hidden; +int _dl_make_stack_executable (const void *stack_endp) attribute_hidden; /* Variable pointing to the end of the stack (or close to it). This value must be constant over the runtime of the application. Some programs @@ -1076,15 +1087,29 @@ extern void _dl_debug_state (void); rtld_hidden_proto (_dl_debug_state) /* Initialize `struct r_debug_extended' for the namespace NS. LDBASE - is the run-time load address of the dynamic linker, to be put in the - `r_ldbase' member. Return the address of the structure. */ + is the run-time load address of the dynamic linker, to be put in + the `r_ldbase' member. + + Return the address of the r_debug structure for the namespace. + This is not merely a convenience or optimization, but it is + necessary for the LIBC_PROBE Systemtap/debugger probes to work + reliably: direct variable access can create probes that tools + cannot consume. */ extern struct r_debug *_dl_debug_initialize (ElfW(Addr) ldbase, Lmid_t ns) attribute_hidden; +/* This is called after relocation processing to handle a potential + copy relocation for _r_debug. */ +void _dl_debug_post_relocate (struct link_map *main_map) attribute_hidden; + /* Update the `r_map' member and return the address of `struct r_debug' of the namespace NS. */ extern struct r_debug *_dl_debug_update (Lmid_t ns) attribute_hidden; +/* Update R->r_state to STATE and notify the debugger by calling + _dl_debug_state. */ +void _dl_debug_change_state (struct r_debug *r, int state) attribute_hidden; + /* Initialize the basic data structure for the search paths. SOURCE is either "LD_LIBRARY_PATH" or "--library-path". GLIBC_HWCAPS_PREPEND adds additional glibc-hwcaps subdirectories to |