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Diffstat (limited to 'third_party/heimdal/lib/roken/getauxval.h')
| -rw-r--r-- | third_party/heimdal/lib/roken/getauxval.h | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/roken/getauxval.h b/third_party/heimdal/lib/roken/getauxval.h new file mode 100644 index 0000000..3088f0c --- /dev/null +++ b/third_party/heimdal/lib/roken/getauxval.h @@ -0,0 +1,176 @@ +/* + * Copyright (c) 2016 - 2017 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef RK_GETAUXVAL_H +#define RK_GETAUXVAL_H + +#include <config.h> + +#ifdef HAVE_SYS_AUXV_H +#include <sys/auxv.h> +#endif + +#ifdef HAVE_SYS_EXEC_ELF_H +#include <sys/exec_elf.h> +#endif + +#ifndef HAVE_AUXV_T +/* + * Illumos defines auxv_t per the ABI standards, but all other OSes seem + * to use { long; long; } instead, depends on sizeof(long) == + * sizeof(void *), and they do not define an auxv_t. + * + * sizeof(long) != sizeof(void *) on WIN64, but Windows doesn't have + * /proc/self/auxv anyways. Just in case we use uintptr_t. + */ +typedef struct rk_auxv { + uintptr_t a_type; + union { + uintptr_t a_val; + uintptr_t a_ptr; /* This would be void * */ + uintptr_t a_fnc; /* This would be void (*)(void) */ + } a_un; +} auxv_t; +#endif + +#ifdef __linux__ +/* + * Older glibcs have no <sys/auxv.h>, but do nonetheless have an ELF + * auxiliary vector, and with the values for these types that appear in + * <sys/auxv.h> in later versions. + * + * Note that Travis-CI still uses Ubuntu 14 for its Linux build + * environment, which has such an older glibc version. + */ +#ifndef AT_UID +#define AT_UID 11 +#endif +#ifndef AT_EUID +#define AT_EUID 12 +#endif +#ifndef AT_GID +#define AT_GID 13 +#endif +#ifndef AT_EGID +#define AT_EGID 14 +#endif +#ifndef AT_SECURE +#define AT_SECURE 23 +#endif +#endif + +#if __sun +#if !defined(AT_UID) && defined(AT_SUN_RUID) +#define AT_UID AT_SUN_RUID +#endif +#if !defined(AT_EUID) && defined(AT_SUN_UID) +#define AT_EUID AT_SUN_UID +#endif +#if !defined(AT_GID) && defined(AT_SUN_RGID) +#define AT_GID AT_SUN_RGID +#endif +#if !defined(AT_EGID) && defined(AT_SUN_GID) +#define AT_EGID AT_SUN_GID +#endif +#endif /* __sun */ + +/* NetBSD calls AT_UID AT_RUID. Everyone else calls it AT_UID. */ +#if defined(AT_EUID) && defined(AT_RUID) && !defined(AT_UID) +#define AT_UID AT_RUID +#endif +#if defined(AT_EGID) && defined(AT_RGID) && !defined(AT_GID) +#define AT_GID AT_RGID +#endif + +#if defined(AT_EUID) && defined(AT_UID) && !defined(AT_RUID) +#define AT_RUID AT_UID +#endif +#if defined(AT_EGID) && defined(AT_GID) && !defined(AT_RGID) +#define AT_RGID AT_GID +#endif + + +/* + * There are three different names for the type whose value is the path + * to the executable being run by the process. + */ +#if defined(AT_EXECFN) && !defined(AT_EXECPATH) +#define AT_EXECPATH AT_EXECFN +#endif +#if defined(AT_EXECFN) && !defined(AT_SUN_EXECNAME) +#define AT_SUN_EXECNAME AT_EXECFN +#endif +#if defined(AT_EXECPATH) && !defined(AT_EXECFN) +#define AT_EXECFN AT_EXECPATH +#endif +#if defined(AT_EXECPATH) && !defined(AT_SUN_EXECNAME) +#define AT_SUN_EXECNAME AT_EXECPATH +#endif +#if defined(AT_SUN_EXECNAME) && !defined(AT_EXECFN) +#define AT_EXECFN AT_SUN_EXECNAME +#endif +#if defined(AT_SUN_EXECNAME) && !defined(AT_EXECPATH) +#define AT_EXECPATH AT_SUN_EXECNAME +#endif + +/* We need this for part of the getauxval() brokenness detection below */ +#ifdef __GLIBC__ +#ifdef __GLIBC_PREREQ +#define HAVE_GLIBC_API_VERSION_SUPPORT(maj, min) __GLIBC_PREREQ(maj, min) +#else +#define HAVE_GLIBC_API_VERSION_SUPPORT(maj, min) \ + ((__GLIBC << 16) + GLIBC_MINOR >= ((maj) << 16) + (min)) +#endif + +/* + * Detect whether getauxval() is broken. + * + * Do change this check in order to manually test rk_getauxval() for + * older glibcs. + */ +#if HAVE_GLIBC_API_VERSION_SUPPORT(2, 19) +#define GETAUXVAL_SETS_ERRNO +/* #else it's broken */ +#endif +#endif + +ROKEN_LIB_FUNCTION const auxv_t * ROKEN_LIB_CALL + rk_getauxv(unsigned long type); + +ROKEN_LIB_FUNCTION unsigned long ROKEN_LIB_CALL + rk_getauxval(unsigned long); + +ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL + rk_injectauxv(auxv_t *e); + +#endif /* RK_GETAUXVAL_H */ |