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/* MN10300 ELF constant and register definitions
*
* Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
#ifndef _ASM_ELF_H
#define _ASM_ELF_H
#include <linux/utsname.h>
#include <asm/ptrace.h>
#include <asm/user.h>
/*
* AM33 relocations
*/
#define R_MN10300_NONE 0 /* No reloc. */
#define R_MN10300_32 1 /* Direct 32 bit. */
#define R_MN10300_16 2 /* Direct 16 bit. */
#define R_MN10300_8 3 /* Direct 8 bit. */
#define R_MN10300_PCREL32 4 /* PC-relative 32-bit. */
#define R_MN10300_PCREL16 5 /* PC-relative 16-bit signed. */
#define R_MN10300_PCREL8 6 /* PC-relative 8-bit signed. */
#define R_MN10300_24 9 /* Direct 24 bit. */
#define R_MN10300_RELATIVE 23 /* Adjust by program base. */
#define R_MN10300_SYM_DIFF 33 /* Adjustment when relaxing. */
#define R_MN10300_ALIGN 34 /* Alignment requirement. */
/*
* AM33/AM34 HW Capabilities
*/
#define HWCAP_MN10300_ATOMIC_OP_UNIT 1 /* Has AM34 Atomic Operations */
/*
* ELF register definitions..
*/
typedef unsigned long elf_greg_t;
#define ELF_NGREG ((sizeof(struct pt_regs) / sizeof(elf_greg_t)) - 1)
typedef elf_greg_t elf_gregset_t[ELF_NGREG];
#define ELF_NFPREG 32
typedef float elf_fpreg_t;
typedef struct {
elf_fpreg_t fpregs[ELF_NFPREG];
u_int32_t fpcr;
} elf_fpregset_t;
/*
* This is used to ensure we don't load something for the wrong architecture
*/
#define elf_check_arch(x) \
(((x)->e_machine == EM_CYGNUS_MN10300) || \
((x)->e_machine == EM_MN10300))
/*
* These are used to set parameters in the core dumps.
*/
#define ELF_CLASS ELFCLASS32
#define ELF_DATA ELFDATA2LSB
#define ELF_ARCH EM_MN10300
/*
* ELF process initialiser
*/
#define ELF_PLAT_INIT(_r, load_addr) \
do { \
struct pt_regs *_ur = current->thread.uregs; \
_ur->a3 = 0; _ur->a2 = 0; _ur->d3 = 0; _ur->d2 = 0; \
_ur->mcvf = 0; _ur->mcrl = 0; _ur->mcrh = 0; _ur->mdrq = 0; \
_ur->e1 = 0; _ur->e0 = 0; _ur->e7 = 0; _ur->e6 = 0; \
_ur->e5 = 0; _ur->e4 = 0; _ur->e3 = 0; _ur->e2 = 0; \
_ur->lar = 0; _ur->lir = 0; _ur->mdr = 0; \
_ur->a1 = 0; _ur->a0 = 0; _ur->d1 = 0; _ur->d0 = 0; \
} while (0)
#define CORE_DUMP_USE_REGSET
#define ELF_EXEC_PAGESIZE 4096
/*
* This is the location that an ET_DYN program is loaded if exec'ed. Typical
* use of this is to invoke "./ld.so someprog" to test out a new version of
* the loader. We need to make sure that it is out of the way of the program
* that it will "exec", and that there is sufficient room for the brk.
* - must clear the VMALLOC area
*/
#define ELF_ET_DYN_BASE 0x04000000
/*
* regs is struct pt_regs, pr_reg is elf_gregset_t (which is
* now struct user_regs, they are different)
* - ELF_CORE_COPY_REGS has been guessed, and may be wrong
*/
#define ELF_CORE_COPY_REGS(pr_reg, regs) \
do { \
pr_reg[0] = regs->a3; \
pr_reg[1] = regs->a2; \
pr_reg[2] = regs->d3; \
pr_reg[3] = regs->d2; \
pr_reg[4] = regs->mcvf; \
pr_reg[5] = regs->mcrl; \
pr_reg[6] = regs->mcrh; \
pr_reg[7] = regs->mdrq; \
pr_reg[8] = regs->e1; \
pr_reg[9] = regs->e0; \
pr_reg[10] = regs->e7; \
pr_reg[11] = regs->e6; \
pr_reg[12] = regs->e5; \
pr_reg[13] = regs->e4; \
pr_reg[14] = regs->e3; \
pr_reg[15] = regs->e2; \
pr_reg[16] = regs->sp; \
pr_reg[17] = regs->lar; \
pr_reg[18] = regs->lir; \
pr_reg[19] = regs->mdr; \
pr_reg[20] = regs->a1; \
pr_reg[21] = regs->a0; \
pr_reg[22] = regs->d1; \
pr_reg[23] = regs->d0; \
pr_reg[24] = regs->orig_d0; \
pr_reg[25] = regs->epsw; \
pr_reg[26] = regs->pc; \
} while (0);
/*
* This yields a mask that user programs can use to figure out what
* instruction set this CPU supports. This could be done in user space,
* but it's not easy, and we've already done it here.
*/
#ifdef CONFIG_MN10300_HAS_ATOMIC_OPS_UNIT
#define ELF_HWCAP (HWCAP_MN10300_ATOMIC_OP_UNIT)
#else
#define ELF_HWCAP (0)
#endif
/*
* This yields a string that ld.so will use to load implementation
* specific libraries for optimization. This is more specific in
* intent than poking at uname or /proc/cpuinfo.
*
* For the moment, we have only optimizations for the Intel generations,
* but that could change...
*/
#define ELF_PLATFORM (NULL)
#endif /* _ASM_ELF_H */