Define architectural load bases for PIE binaries. Addresses were selected

by looking at the bases used for non-relocatable executables by gnu ld(1),
and adjusting it slightly.

Discussed with:	bz
Reviewed by:	kan
Tested by:	bz (i386, amd64), bsam (linux)
MFC after:	some time

sys/amd64/include/elf.h

@@ -106,4 +106,10 @@ __ElfType(Auxinfo);
 #define	ELF_TARG_MACH	EM_X86_64
 #define	ELF_TARG_VER	1
 
+#if __ELF_WORD_SIZE == 32
+#define	ET_DYN_LOAD_ADDR 0x01001000
+#else
+#define	ET_DYN_LOAD_ADDR 0x01021000
+#endif
+
 #endif /* !_MACHINE_ELF_H_ */

sys/arm/include/elf.h

@@ -97,4 +97,7 @@ __ElfType(Auxinfo);
  * value.
  */
 #define MAGIC_TRAMP_NUMBER	0x5c000003
+
+#define	ET_DYN_LOAD_ADDR 0x12000
+
 #endif /* !_MACHINE_ELF_H_ */

sys/i386/include/elf.h

@@ -105,4 +105,6 @@ __ElfType(Auxinfo);
 #define	ELF_TARG_MACH	EM_386
 #define	ELF_TARG_VER	1
 
+#define	ET_DYN_LOAD_ADDR 0x01001000
+
 #endif /* !_MACHINE_ELF_H_ */

sys/ia64/include/elf.h

@@ -141,4 +141,6 @@ __ElfType(Auxinfo);
 
 #define	DT_IA_64_PLT_RESERVE	0x70000000
 
+#define	ET_DYN_LOAD_ADDR 0x2500000000000000
+
 #endif /* !_MACHINE_ELF_H_ */

sys/mips/include/elf.h

@@ -250,4 +250,6 @@ __ElfType(Auxinfo);
 
 #define	AT_COUNT	16	/* Count of defined aux entry types. */
 
+#define	ET_DYN_LOAD_ADDR 0x0120000
+
 #endif /* !_MACHINE_ELF_H_ */

sys/powerpc/include/elf.h

@@ -96,4 +96,6 @@ __ElfType(Auxinfo);
 #define	ELF_TARG_MACH	EM_PPC
 #define	ELF_TARG_VER	1
 
+#define	ET_DYN_LOAD_ADDR 0x01010000
+
 #endif /* !_MACHINE_ELF_H_ */

sys/sparc64/include/elf.h

@@ -97,4 +97,6 @@ __ElfType(Auxinfo);
 #define	ELF_TARG_MACH	ELF_ARCH
 #define	ELF_TARG_VER	1
 
+#define	ET_DYN_LOAD_ADDR 0x150000000
+
 #endif /* !_MACHINE_ELF_H_ */

sys/sun4v/include/elf.h

@@ -97,4 +97,6 @@ __ElfType(Auxinfo);
 #define	ELF_TARG_MACH	ELF_ARCH
 #define	ELF_TARG_VER	1
 
+#define	ET_DYN_LOAD_ADDR 0x150000000
+
 #endif /* !_MACHINE_ELF_H_ */