NAME
elf_aux_info —
extract data from the elf auxiliary
vector of the current process
SYNOPSIS
#include
<sys/auxv.h>
int
elf_aux_info(int
aux, void *buf,
int buflen);
DESCRIPTION
The
elf_aux_info()
function retrieves the auxiliary info vector requested in
aux. The information is stored into the provided
buffer if it will fit. The following values can be requested (corresponding
buffer sizes are specified in parenthesis):
- AT_HWCAP
- CPU / hardware feature flags
(sizeof(unsigned long)). - AT_HWCAP2
- CPU / hardware feature flags
(sizeof(unsigned long)). - AT_PAGESZ
- Page size in bytes
(sizeof(int)).
RETURN VALUES
Returns zero on success, or an error number on failure.
ERRORS
- [
EINVAL] - An unknown item was requested.
- [
EINVAL] - The provided buffer was not the right size for the requested item.
- [
ENOENT] - The requested item is not available.
HISTORY
The elf_aux_info() function appeared in
FreeBSD 12.0 and was first available in
OpenBSD 7.6.