diff options
Diffstat (limited to 'elf/dl-support.c')
| -rw-r--r-- | elf/dl-support.c | 80 |
1 files changed, 76 insertions, 4 deletions
diff --git a/elf/dl-support.c b/elf/dl-support.c index 1977a2b..6d2c4ba 100644 --- a/elf/dl-support.c +++ b/elf/dl-support.c @@ -240,21 +240,93 @@ __rtld_lock_define_initialized_recursive (, _dl_load_tls_lock) #ifdef HAVE_AUX_VECTOR -#include <dl-parse_auxv.h> - int _dl_clktck; void _dl_aux_init (ElfW(auxv_t) *av) { + int seen = 0; + uid_t uid = 0; + gid_t gid = 0; + #ifdef NEED_DL_SYSINFO /* NB: Avoid RELATIVE relocation in static PIE. */ GL(dl_sysinfo) = DL_SYSINFO_DEFAULT; #endif _dl_auxv = av; - dl_parse_auxv_t auxv_values = { 0, }; - _dl_parse_auxv (av, auxv_values); + for (; av->a_type != AT_NULL; ++av) + switch (av->a_type) + { + case AT_PAGESZ: + if (av->a_un.a_val != 0) + GLRO(dl_pagesize) = av->a_un.a_val; + break; + case AT_CLKTCK: + GLRO(dl_clktck) = av->a_un.a_val; + break; + case AT_PHDR: + GL(dl_phdr) = (const void *) av->a_un.a_val; + break; + case AT_PHNUM: + GL(dl_phnum) = av->a_un.a_val; + break; + case AT_PLATFORM: + GLRO(dl_platform) = (void *) av->a_un.a_val; + break; + case AT_HWCAP: + GLRO(dl_hwcap) = (unsigned long int) av->a_un.a_val; + break; + case AT_HWCAP2: + GLRO(dl_hwcap2) = (unsigned long int) av->a_un.a_val; + break; + case AT_FPUCW: + GLRO(dl_fpu_control) = av->a_un.a_val; + break; +#ifdef NEED_DL_SYSINFO + case AT_SYSINFO: + GL(dl_sysinfo) = av->a_un.a_val; + break; +#endif +#ifdef NEED_DL_SYSINFO_DSO + case AT_SYSINFO_EHDR: + GL(dl_sysinfo_dso) = (void *) av->a_un.a_val; + break; +#endif + case AT_UID: + uid ^= av->a_un.a_val; + seen |= 1; + break; + case AT_EUID: + uid ^= av->a_un.a_val; + seen |= 2; + break; + case AT_GID: + gid ^= av->a_un.a_val; + seen |= 4; + break; + case AT_EGID: + gid ^= av->a_un.a_val; + seen |= 8; + break; + case AT_SECURE: + seen = -1; + __libc_enable_secure = av->a_un.a_val; + __libc_enable_secure_decided = 1; + break; + case AT_RANDOM: + _dl_random = (void *) av->a_un.a_val; + break; + case AT_MINSIGSTKSZ: + _dl_minsigstacksize = av->a_un.a_val; + break; + DL_PLATFORM_AUXV + } + if (seen == 0xf) + { + __libc_enable_secure = uid != 0 || gid != 0; + __libc_enable_secure_decided = 1; + } } #endif |