diff options
| author | Georg Kotheimer <georg.kotheimer@kernkonzept.com> | 2025-03-03 16:41:13 +0100 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@openadk.org> | 2025-03-04 07:43:56 +0100 |
| commit | 227b7c825b6c79479f7222be03e83991b927da26 (patch) | |
| tree | 3e731e65d7dc915ee292d7694514cc254a02714a /libc/misc/elf/dl-support.c | |
| parent | d2739d1cd3c6b89f0f4e3b36d2d9b47d5b79e311 (diff) | |
Make getauxval work with static linking
While for dynamic linking the _dl_auxvt array is provided in
dl-startup.c as part of the ldso, is was undefined for statically
linked binaries. This resulted in a corresponding linker error if
a statically linked program used getauxval.
To provide _dl_auxvt also for statically linked binaries, a definition
of _dl_auxvt is added to dl-support.c and initialized by _dl_aux_init().
Signed-off-by: Marcus Haehnel <marcus.haehnel@kernkonzept.com>
Diffstat (limited to 'libc/misc/elf/dl-support.c')
| -rw-r--r-- | libc/misc/elf/dl-support.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/libc/misc/elf/dl-support.c b/libc/misc/elf/dl-support.c index 87cd1bb72..81c78fa55 100644 --- a/libc/misc/elf/dl-support.c +++ b/libc/misc/elf/dl-support.c @@ -12,6 +12,7 @@ */ #include <link.h> +#include <ldso.h> #include <elf.h> #if defined(USE_TLS) && USE_TLS #include <assert.h> @@ -31,17 +32,26 @@ ElfW(Phdr) *_dl_phdr; size_t _dl_phnum; size_t _dl_pagesize; +ElfW(auxv_t) _dl_auxvt[AUX_MAX_AT_ID]; + void internal_function _dl_aux_init (ElfW(auxv_t) *av); void internal_function _dl_aux_init (ElfW(auxv_t) *av) { + memset(_dl_auxvt, 0x00, sizeof(_dl_auxvt)); + for (; av->a_type != AT_NULL; av++) + { + if (av->a_type < AUX_MAX_AT_ID) + _dl_auxvt[av->a_type] = *av; + } + /* Get the program headers base address from the aux vect */ - _dl_phdr = (ElfW(Phdr) *) av[AT_PHDR].a_un.a_val; + _dl_phdr = (ElfW(Phdr) *) _dl_auxvt[AT_PHDR].a_un.a_val; /* Get the number of program headers from the aux vect */ - _dl_phnum = (size_t) av[AT_PHNUM].a_un.a_val; + _dl_phnum = (size_t) _dl_auxvt[AT_PHNUM].a_un.a_val; /* Get the pagesize from the aux vect */ - _dl_pagesize = (av[AT_PAGESZ].a_un.a_val) ? (size_t) av[AT_PAGESZ].a_un.a_val : PAGE_SIZE; + _dl_pagesize = (_dl_auxvt[AT_PAGESZ].a_un.a_val) ? (size_t) _dl_auxvt[AT_PAGESZ].a_un.a_val : PAGE_SIZE; } #if defined(USE_TLS) && USE_TLS |