diff options
Diffstat (limited to 'src/os-unix.h')
| -rw-r--r-- | src/os-unix.h | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/src/os-unix.h b/src/os-unix.h index 5c3c604..ec9a940 100644 --- a/src/os-unix.h +++ b/src/os-unix.h @@ -1,5 +1,5 @@ /* - * Copyright © 2022 Michael Smith <mikesmiffy128@gmail.com> + * Copyright © 2023 Michael Smith <mikesmiffy128@gmail.com> * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above @@ -46,14 +46,22 @@ typedef char os_char; #define os_dlsym dlsym #ifdef __linux__ -static inline bool os_dlfile(void *m, char *buf, int sz) { - // NOTE: this might be linux/glibc-specific (I haven't checked every - // implementation). this is fine as we don't use it in any build-time code, - // only in the plugin itself. just keep it in mind! - struct link_map *lm = m; - ssz len = strlen(lm->l_name) + 1; - if (ssz > sz) { errno = ENAMETOOLONG; return false; } - memcpy(buf, lm->l_name, ssz); return true; +// note: this is glibc-specific. it shouldn't be used in build-time code, just +// the plugin itself (that really shouldn't be a problem). +static inline int os_dlfile(void *m, char *buf, int sz) { + // private struct hidden behind _GNU_SOURCE. see dlinfo(3) or <link.h> + struct gnu_link_map { + unsigned long l_addr; + const char *l_name; + void *l_ld; + struct gnu_link_map *l_next, *l_prev; + // [more private stuff below] + }; + struct gnu_link_map *lm = m; + int ssz = strlen(lm->l_name) + 1; + if (ssz > sz) { errno = ENAMETOOLONG; return -1; } + memcpy(buf, lm->l_name, ssz); + return ssz; } #endif |