diff options
| -rw-r--r-- | lib/substitute.h | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/lib/substitute.h b/lib/substitute.h index 034cc26..72c3919 100644 --- a/lib/substitute.h +++ b/lib/substitute.h @@ -87,10 +87,17 @@ enum { const char *substitute_strerror(int err); struct substitute_function_hook { + /* The function to hook. (On ARM, Thumb functions are indicated as usual + * for function pointers.) */ void *function; + /* The replacement function. */ void *replacement; - void *old_ptr; /* optional: out *pointer* to function pointer to call old - * impl */ + /* Optional: out *pointer* to function pointer to call old implementation + * (i.e. given 'void (*old_foo)(...);', pass &old_foo) */ + void *old_ptr; + /* Currently unused; pass 0. (Protip: When using C {} struct initializer + * syntax, you can just omit this.) */ + int options; }; /* substitute_hook_functions options */ @@ -216,6 +223,9 @@ struct substitute_import_hook { * the same symbol, only one address is returned (hopefully they are all * equal) */ void *old_ptr; + /* Currently unused; pass 0. (Protip: When using C {} struct initializer + * syntax, you can just omit this.) */ + int options; }; /* Directly modify the GOT/PLT entries from a specified image corresponding to |