diff options
Diffstat (limited to 'include/set-hooks.h')
| -rw-r--r-- | include/set-hooks.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/set-hooks.h b/include/set-hooks.h index a60b5ae..1a2f6ad 100644 --- a/include/set-hooks.h +++ b/include/set-hooks.h @@ -24,6 +24,8 @@ #include <sys/cdefs.h> #include <libc-symbols.h> +#include "set-hooks-arch.h" + #ifdef symbol_set_define /* Define a hook variable called NAME. Functions put on this hook take arguments described by PROTO. Use `text_set_element (NAME, FUNCTION)' @@ -55,6 +57,25 @@ do { \ DEFINE_HOOK (name, proto); \ extern void runner proto; void runner proto { RUN_HOOK (name, args); } +# ifdef SET_RELHOOK +/* This is similar to RUN_RELHOOK, but the hooks were registered with + * SET_RELHOOK so that a relative offset was computed by the linker + * rather than an absolute address by the dynamic linker. */ +# define RUN_RELHOOK(NAME, ARGS) \ +do { \ + void *const *ptr; \ + for (ptr = (void *const *) symbol_set_first_element (NAME); \ + ! symbol_set_end_p (NAME, ptr); ++ptr) { \ + __##NAME##_hook_function_t *f = \ + (void*) ((uintptr_t) ptr + (ptrdiff_t) *ptr); \ + (*f) ARGS; \ + } \ +} while (0) +# else +# define SET_RELHOOK(NAME, HOOK) text_set_element (NAME, HOOK) +# define RUN_RELHOOK(NAME, ARGS) RUN_HOOK(NAME, ARGS) +# endif + #else /* The system does not provide necessary support for this. */ @@ -66,6 +87,10 @@ extern void runner proto; void runner proto { RUN_HOOK (name, args); } # define DEFINE_HOOK_RUNNER(name, runner, proto, args) +# define SET_RELHOOK(NAME, HOOK) + +# define RUN_RELHOOK(NAME, ARGS) + #endif #endif /* set-hooks.h */ |