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microblaze_v8: headers for executables format FLAT, ELF

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Reviewed-by: Ingo Molnar <mingo@elte.hu>
Acked-by: John Linn <john.linn@xilinx.com>
Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
Acked-by: John Williams <john.williams@petalogix.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Michal Simek 2009-03-27 14:25:34 +01:00
parent 2c572c2824
commit c6087fdc77
2 changed files with 120 additions and 0 deletions
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30
arch/microblaze/include/asm/elf.h Normal file
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/*
* Copyright (C) 2006 Atmark Techno, Inc.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#ifndef _ASM_MICROBLAZE_ELF_H
#define _ASM_MICROBLAZE_ELF_H
/*
* Note there is no "official" ELF designation for Microblaze.
* I've snaffled the value from the microblaze binutils source code
* /binutils/microblaze/include/elf/microblaze.h
*/
#define EM_XILINX_MICROBLAZE 0xbaab
#define ELF_ARCH EM_XILINX_MICROBLAZE
/*
* This is used to ensure we don't load something for the wrong architecture.
*/
#define elf_check_arch(x) ((x)->e_machine == EM_XILINX_MICROBLAZE)
/*
* These are used to set parameters in the core dumps.
*/
#define ELF_CLASS ELFCLASS32
#endif /* _ASM_MICROBLAZE_ELF_H */

90
arch/microblaze/include/asm/flat.h Normal file
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/*
* uClinux flat-format executables
*
* Copyright (C) 2005 John Williams <jwilliams@itee.uq.edu.au>
*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file COPYING in the main directory of this
* archive for more details.
*/
#ifndef _ASM_MICROBLAZE_FLAT_H
#define _ASM_MICROBLAZE_FLAT_H
#include <asm/unaligned.h>
#define flat_stack_align(sp) /* nothing needed */
#define flat_argvp_envp_on_stack() 0
#define flat_old_ram_flag(flags) (flags)
#define flat_reloc_valid(reloc, size) ((reloc) <= (size))
#define flat_set_persistent(relval, p) 0
/*
* Microblaze works a little differently from other arches, because
* of the MICROBLAZE_64 reloc type. Here, a 32 bit address is split
* over two instructions, an 'imm' instruction which provides the top
* 16 bits, then the instruction "proper" which provides the low 16
* bits.
*/
/*
* Crack open a symbol reference and extract the address to be
* relocated. rp is a potentially unaligned pointer to the
* reference
*/
static inline unsigned long
flat_get_addr_from_rp(unsigned long *rp, unsigned long relval,
unsigned long flags, unsigned long *persistent)
{
unsigned long addr;
(void)flags;
/* Is it a split 64/32 reference? */
if (relval & 0x80000000) {
/* Grab the two halves of the reference */
unsigned long val_hi, val_lo;
val_hi = get_unaligned(rp);
val_lo = get_unaligned(rp+1);
/* Crack the address out */
addr = ((val_hi & 0xffff) << 16) + (val_lo & 0xffff);
} else {
/* Get the address straight out */
addr = get_unaligned(rp);
}
return addr;
}
/*
* Insert an address into the symbol reference at rp. rp is potentially
* unaligned.
*/
static inline void
flat_put_addr_at_rp(unsigned long *rp, unsigned long addr, unsigned long relval)
{
/* Is this a split 64/32 reloc? */
if (relval & 0x80000000) {
/* Get the two "halves" */
unsigned long val_hi = get_unaligned(rp);
unsigned long val_lo = get_unaligned(rp + 1);
/* insert the address */
val_hi = (val_hi & 0xffff0000) | addr >> 16;
val_lo = (val_lo & 0xffff0000) | (addr & 0xffff);
/* store the two halves back into memory */
put_unaligned(val_hi, rp);
put_unaligned(val_lo, rp+1);
} else {
/* Put it straight in, no messing around */
put_unaligned(addr, rp);
}
}
#define flat_get_relocate_addr(rel) (rel & 0x7fffffff)
#endif /* _ASM_MICROBLAZE_FLAT_H */