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porting.h
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porting.h
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/*
* Copyright 2005-2024 Gentoo Foundation
* Distributed under the terms of the GNU General Public License v2
*
* Copyright 2005-2012 Ned Ludd - <solar@gentoo.org>
* Copyright 2005-2024 Mike Frysinger - <vapier@gentoo.org>
*
* Make sure all of the common elf stuff is setup as we expect
*/
#ifndef _PORTING_H
#define _PORTING_H
#include "config.h"
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(*arr))
#include <assert.h>
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <fnmatch.h>
#include <getopt.h>
#include <inttypes.h>
#include <libgen.h>
#include <limits.h>
#include <pwd.h>
#include <regex.h>
#include <sched.h>
#include <signal.h>
#include <stddef.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include "elf.h"
#ifdef HAVE_SYS_PRCTL_H
# include <sys/prctl.h>
# ifdef HAVE_LINUX_SECCOMP_H
# include <linux/seccomp.h>
# endif
# ifdef HAVE_LINUX_SECUREBITS_H
# include <linux/securebits.h>
# endif
#endif
#if defined(HAVE_ENDIAN_H) && defined(HAVE_BYTESWAP_H)
# include <byteswap.h>
# include <endian.h>
#elif defined(HAVE_SYS_ENDIAN_H)
# include <sys/endian.h>
#elif defined(HAVE_ISA_DEFS_H)
# include <sys/isa_defs.h>
#elif defined(HAVE_MACHINE_ENDIAN_H)
# include <machine/endian.h>
#endif
#ifdef HAVE_GLOB_H
# include <glob.h>
#endif
#if defined(__GLIBC__) || defined(__UCLIBC__) || defined(__NetBSD__)
# define __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG "/etc/ld.so.conf"
#elif defined(HAVE_ELF_HINTS_H)
# include <elf-hints.h>
# define __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG _PATH_ELF_HINTS
#else
# define __PAX_UTILS_DEFAULT_LD_CACHE_CONFIG ""
#endif
#undef PAX_UTILS_CLEANUP
#ifndef __SANITIZE_ADDRESS__
# ifdef __has_feature
# if __has_feature (address_sanitizer)
# define __SANITIZE_ADDRESS__ 1
# endif
# endif
#endif
/* LSAN (Leak Sanitizer) will complain about things we leak. */
#ifdef __SANITIZE_ADDRESS__
# define PAX_UTILS_CLEANUP 1
#endif
/* Coverity catches some things we leak on purpose. */
#ifdef __COVERITY__
# define PAX_UTILS_CLEANUP 1
#endif
#ifndef PAX_UTILS_CLEANUP
# define PAX_UTILS_CLEANUP 0
#endif
/* Support for libFuzzer: https://llvm.org/docs/LibFuzzer.html */
#ifndef PAX_UTILS_LIBFUZZ
# define PAX_UTILS_LIBFUZZ 0
#endif
/* Few arches can safely do unaligned accesses */
#if defined(__cris__) || \
defined(__i386__) || \
defined(__powerpc__) || \
defined(__s390__) || \
defined(__x86_64__)
# define __PAX_UNALIGNED_OK 1
#else
# define __PAX_UNALIGNED_OK 0
#endif
#if !defined(bswap_16)
# if defined(bswap16)
# define bswap_16 bswap16
# define bswap_32 bswap32
# define bswap_64 bswap64
# else
# define bswap_16(x) \
((((x) & 0xff00) >> 8) | \
(((x) & 0x00ff) << 8))
# define bswap_32(x) \
((((x) & 0xff000000) >> 24) | \
(((x) & 0x00ff0000) >> 8) | \
(((x) & 0x0000ff00) << 8) | \
(((x) & 0x000000ff) << 24))
# if defined(__GNUC__)
# define bswap_64(x) \
((((x) & 0xff00000000000000ull) >> 56) | \
(((x) & 0x00ff000000000000ull) >> 40) | \
(((x) & 0x0000ff0000000000ull) >> 24) | \
(((x) & 0x000000ff00000000ull) >> 8) | \
(((x) & 0x00000000ff000000ull) << 8) | \
(((x) & 0x0000000000ff0000ull) << 24) | \
(((x) & 0x000000000000ff00ull) << 40) | \
(((x) & 0x00000000000000ffull) << 56))
# else
# define bswap_64(x) \
((((x) & 0xff00000000000000) >> 56) | \
(((x) & 0x00ff000000000000) >> 40) | \
(((x) & 0x0000ff0000000000) >> 24) | \
(((x) & 0x000000ff00000000) >> 8) | \
(((x) & 0x00000000ff000000) << 8) | \
(((x) & 0x0000000000ff0000) << 24) | \
(((x) & 0x000000000000ff00) << 40) | \
(((x) & 0x00000000000000ff) << 56))
# endif
# endif
#endif
#define _minmax(x, y, op) \
({ __typeof__(x) __x = (x); __typeof__(y) __y = (y); (__x op __y ? __x : __y); })
#if !defined(min)
# define min(x, y) _minmax(x, y, <)
#endif
#if !defined(max)
# define max(x, y) _minmax(x, y, >)
#endif
#if !defined(_POSIX_PATH_MAX) && !defined(PATH_MAX) /* __PAX_UTILS_PATH_MAX */
# define __PAX_UTILS_PATH_MAX 8192
#elif _POSIX_PATH_MAX > PATH_MAX /* __PAX_UTILS_PATH_MAX */
# define __PAX_UTILS_PATH_MAX _POSIX_PATH_MAX
#else
# define __PAX_UTILS_PATH_MAX PATH_MAX
#endif
#if !defined(ELF_DATA)
# if defined(BYTE_ORDER)
# if BYTE_ORDER == LITTLE_ENDIAN
# define ELF_DATA ELFDATA2LSB
# elif BYTE_ORDER == BIG_ENDIAN
# define ELF_DATA ELFDATA2MSB
# else
# error "BYTE_ORDER: you fail"
# endif
# elif defined(__BYTE_ORDER)
# if __BYTE_ORDER == __LITTLE_ENDIAN
# define ELF_DATA ELFDATA2LSB
# elif __BYTE_ORDER == __BIG_ENDIAN
# define ELF_DATA ELFDATA2BSB
# else
# error "__BYTE_ORDER: you fail"
# endif
# elif defined(WORDS_LITTLENDIAN)
# define ELF_DATA ELFDATA2LSB
# elif defined(WORDS_BIGENDIAN)
# define ELF_DATA ELFDATA2MSB
# elif defined(_LITTLE_ENDIAN)
# define ELF_DATA ELFDATA2LSB
# elif defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
# define ELF_DATA ELFDATA2MSB
# else
# error "no idea what the native byte order is"
# endif
#endif
/*
* Probably will never be officially added to the toolchain.
* But none the less we should try to get 0x65041580 reserved
*/
#ifndef PT_PAX_FLAGS
# define PT_PAX_FLAGS 0x65041580
# define PF_PAGEEXEC (1 << 4) /* Enable PAGEEXEC */
# define PF_NOPAGEEXEC (1 << 5) /* Disable PAGEEXEC */
# define PF_SEGMEXEC (1 << 6) /* Enable SEGMEXEC */
# define PF_NOSEGMEXEC (1 << 7) /* Disable SEGMEXEC */
# define PF_MPROTECT (1 << 8) /* Enable MPROTECT */
# define PF_NOMPROTECT (1 << 9) /* Disable MPROTECT */
# define PF_RANDEXEC (1 << 10) /* Enable RANDEXEC */
# define PF_NORANDEXEC (1 << 11) /* Disable RANDEXEC */
# define PF_EMUTRAMP (1 << 12) /* Enable EMUTRAMP */
# define PF_NOEMUTRAMP (1 << 13) /* Disable EMUTRAMP */
# define PF_RANDMMAP (1 << 14) /* Enable RANDMMAP */
# define PF_NORANDMMAP (1 << 15) /* Disable RANDMMAP */
#endif /* PT_PAX_ */
/* older glibc/uclibc will need this since they typo-ed the define */
#ifndef EM_ST19
# ifdef EM_AT19
# define EM_ST19 EM_AT19
# else
# define EM_ST19 74
# endif
#endif
#ifndef O_CLOEXEC
# define O_CLOEXEC 0
#endif
#ifndef O_PATH
# define O_PATH 0
#endif
#define __unused__ __attribute__((__unused__))
#endif /* _PORTING_H */