/*
 * $Header: /var/cvsroot/gentoo-projects/pax-utils/porting.h,v 1.3 2005/05/30 03:23:07 vapier Exp $
 * Make sure all of the common elf stuff is setup as we expect
 */

#ifndef _PORTING_H
#define _PORTING_H

#include <sys/mman.h>
#include "elf.h"
#if defined(__linux__)
# include <byteswap.h>
# include <asm/elf.h>
#elif defined(__FreeBSD__)
# include <sys/endian.h>
#endif

#if defined(__APPLE__)
# define SET_STDOUT(fp) err("Darwin has stupid stdout handling")
#else
# define SET_STDOUT(fp) stdout = fp
#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

#if !defined(ELF_DATA)
# if BYTE_ORDER == LITTLE_ENDIAN
#  define ELF_DATA ELFDATA2LSB
# else
#  define ELF_DATA ELFDATA2MSB
# endif
#endif

/*
 * in case we are not defined by proper/up-to-date system headers, 
 * we check for a whole lot of things and copy them from elf.h.
 */

#ifndef PT_GNU_STACK
# define PT_GNU_STACK	0x6474e551
#endif

/* not in <=binutils-2.14.90.0.8 (should come in by way of .9) */
#ifndef PT_GNU_RELRO
# define PT_GNU_RELRO	0x6474e552
#endif

/* 
 * propably will never be official 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

#endif /* _PORTING_H */