elf.h

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/*
 *  Port on Texas Instruments TMS320C6x architecture
 *
 *  Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated
 *  Author: Aurelien Jacquiot ([email protected])
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 */
#ifndef _ASM_C6X_ELF_H
#define _ASM_C6X_ELF_H

/*
 * ELF register definitions..
 */
#include <asm/ptrace.h>

typedef unsigned long elf_greg_t;
typedef unsigned long elf_fpreg_t;

#define ELF_NGREG  58
#define ELF_NFPREG 1

typedef elf_greg_t elf_gregset_t[ELF_NGREG];
typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];

/*
 * This is used to ensure we don't load something for the wrong architecture.
 */
#define elf_check_arch(x) ((x)->e_machine == EM_TI_C6000)

#define elf_check_fdpic(x) (1)
#define elf_check_const_displacement(x) (0)

#define ELF_FDPIC_PLAT_INIT(_regs, _exec_map, _interp_map, _dynamic_addr) \
do {                                \
    _regs->b4   = (_exec_map);              \
    _regs->a6   = (_interp_map);            \
    _regs->b6   = (_dynamic_addr);          \
} while (0)

#define ELF_FDPIC_CORE_EFLAGS   0

#define ELF_CORE_COPY_FPREGS(...) 0 /* No FPU regs to copy */

/*
 * These are used to set parameters in the core dumps.
 */
#ifdef __LITTLE_ENDIAN__
#define ELF_DATA    ELFDATA2LSB
#else
#define ELF_DATA    ELFDATA2MSB
#endif

#define ELF_CLASS   ELFCLASS32
#define ELF_ARCH    EM_TI_C6000

/* Nothing for now. Need to setup DP... */
#define ELF_PLAT_INIT(_r)

#define USE_ELF_CORE_DUMP
#define ELF_EXEC_PAGESIZE   4096

#define ELF_CORE_COPY_REGS(_dest, _regs)        \
    memcpy((char *) &_dest, (char *) _regs,     \
    sizeof(struct pt_regs));

/* This yields a mask that user programs can use to figure out what
   instruction set this cpu supports.  */

#define ELF_HWCAP   (0)

/* 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.  */

#define ELF_PLATFORM  (NULL)

#define SET_PERSONALITY(ex) \
    set_personality(PER_LINUX | (current->personality & (~PER_MASK)))

/* C6X specific section types */
#define SHT_C6000_UNWIND    0x70000001
#define SHT_C6000_PREEMPTMAP    0x70000002
#define SHT_C6000_ATTRIBUTES    0x70000003

/* C6X specific DT_ tags */
#define DT_C6000_DSBT_BASE  0x70000000
#define DT_C6000_DSBT_SIZE  0x70000001
#define DT_C6000_PREEMPTMAP 0x70000002
#define DT_C6000_DSBT_INDEX 0x70000003

/* C6X specific relocs */
#define R_C6000_NONE        0
#define R_C6000_ABS32       1
#define R_C6000_ABS16       2
#define R_C6000_ABS8        3
#define R_C6000_PCR_S21     4
#define R_C6000_PCR_S12     5
#define R_C6000_PCR_S10     6
#define R_C6000_PCR_S7      7
#define R_C6000_ABS_S16     8
#define R_C6000_ABS_L16     9
#define R_C6000_ABS_H16     10
#define R_C6000_SBR_U15_B   11
#define R_C6000_SBR_U15_H   12
#define R_C6000_SBR_U15_W   13
#define R_C6000_SBR_S16     14
#define R_C6000_SBR_L16_B   15
#define R_C6000_SBR_L16_H   16
#define R_C6000_SBR_L16_W   17
#define R_C6000_SBR_H16_B   18
#define R_C6000_SBR_H16_H   19
#define R_C6000_SBR_H16_W   20
#define R_C6000_SBR_GOT_U15_W   21
#define R_C6000_SBR_GOT_L16_W   22
#define R_C6000_SBR_GOT_H16_W   23
#define R_C6000_DSBT_INDEX  24
#define R_C6000_PREL31      25
#define R_C6000_COPY        26
#define R_C6000_ALIGN       253
#define R_C6000_FPHEAD      254
#define R_C6000_NOCMP       255

#endif /*_ASM_C6X_ELF_H */