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      1 /* RX ELF support for BFD.
      2    Copyright (C) 2008-2014 Free Software Foundation, Inc.
      3 
      4    This file is part of BFD, the Binary File Descriptor library.
      5 
      6    This program is free software; you can redistribute it and/or modify
      7    it under the terms of the GNU General Public License as published by
      8    the Free Software Foundation; either version 3 of the License, or
      9    (at your option) any later version.
     10 
     11    This program is distributed in the hope that it will be useful,
     12    but WITHOUT ANY WARRANTY; without even the implied warranty of
     13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     14    GNU General Public License for more details.
     15 
     16    You should have received a copy of the GNU General Public License
     17    along with this program; if not, write to the Free Software Foundation,
     18    Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
     19 
     20 #ifndef _ELF_RX_H
     21 #define _ELF_RX_H
     22 
     23 #include "elf/reloc-macros.h"
     24 
     25 /* Note that there are a few internal relocation types used by the
     26    linker to do link-time relaxation.  If you update this file, please
     27    check elf32-rx.c to see if any of the internal relocations need to
     28    be, er, relocated.  */
     29 
     30 /* Preliminary relocations.  */
     31 START_RELOC_NUMBERS (elf_rx_reloc_type)
     32 
     33   RELOC_NUMBER (R_RX_NONE,         0x00)
     34   /* These are for data, and are bi-endian.  */
     35   RELOC_NUMBER (R_RX_DIR32,        0x01) /* Was: R_RX_32.  */
     36   RELOC_NUMBER (R_RX_DIR24S,       0x02) /* Was: R_RX_24.  */
     37   RELOC_NUMBER (R_RX_DIR16,        0x03)
     38   RELOC_NUMBER (R_RX_DIR16U,       0x04) /* Was: R_RX_16_UNS.  */
     39   RELOC_NUMBER (R_RX_DIR16S,       0x05) /* Was: R_RX_16.  */
     40   RELOC_NUMBER (R_RX_DIR8,         0x06)
     41   RELOC_NUMBER (R_RX_DIR8U,        0x07) /* Was: R_RX_8_UNS.  */
     42   RELOC_NUMBER (R_RX_DIR8S,        0x08) /* Was: R_RX_8.  */
     43 
     44   /* Signed pc-relative values.  */
     45   RELOC_NUMBER (R_RX_DIR24S_PCREL, 0x09) /* Was: R_RX_24_PCREL.  */
     46   RELOC_NUMBER (R_RX_DIR16S_PCREL, 0x0a) /* Was: R_RX_16_PCREL.  */
     47   RELOC_NUMBER (R_RX_DIR8S_PCREL,  0x0b) /* Was: R_RX_8_PCREL.  */
     48 
     49   /* These are for fields in the instructions.  */
     50   RELOC_NUMBER (R_RX_DIR16UL,      0x0c)
     51   RELOC_NUMBER (R_RX_DIR16UW,      0x0d)
     52   RELOC_NUMBER (R_RX_DIR8UL,       0x0e)
     53   RELOC_NUMBER (R_RX_DIR8UW,       0x0f)
     54   RELOC_NUMBER (R_RX_DIR32_REV,    0x10)
     55   RELOC_NUMBER (R_RX_DIR16_REV,    0x11)
     56   RELOC_NUMBER (R_RX_DIR3U_PCREL,  0x12)
     57 
     58   /* These are extensions added by Red Hat.  */
     59   RELOC_NUMBER (R_RX_RH_3_PCREL,   0x20) /* Like R_RX_DIR8S_PCREL but only 3-bits.  */
     60   RELOC_NUMBER (R_RX_RH_16_OP,     0x21) /* Like R_RX_DIR16 but for opcodes - always big endian.  */
     61   RELOC_NUMBER (R_RX_RH_24_OP,     0x22) /* Like R_RX_DIR24S but for opcodes - always big endian.  */
     62   RELOC_NUMBER (R_RX_RH_32_OP,     0x23) /* Like R_RX_DIR32 but for opcodes - always big endian.  */
     63   RELOC_NUMBER (R_RX_RH_24_UNS,    0x24) /* Like R_RX_DIR24S but for unsigned values.  */
     64   RELOC_NUMBER (R_RX_RH_8_NEG,     0x25) /* Like R_RX_DIR8 but -x is stored.  */
     65   RELOC_NUMBER (R_RX_RH_16_NEG,    0x26) /* Like R_RX_DIR16 but -x is stored.  */
     66   RELOC_NUMBER (R_RX_RH_24_NEG,    0x27) /* Like R_RX_DIR24S but -x is stored.  */
     67   RELOC_NUMBER (R_RX_RH_32_NEG,    0x28) /* Like R_RX_DIR32 but -x is stored.  */
     68   RELOC_NUMBER (R_RX_RH_DIFF,      0x29) /* Subtract from a previous relocation.  */
     69   RELOC_NUMBER (R_RX_RH_GPRELB,    0x2a) /* Byte value, relative to __gp.  */
     70   RELOC_NUMBER (R_RX_RH_GPRELW,    0x2b) /* Word value, relative to __gp.  */
     71   RELOC_NUMBER (R_RX_RH_GPRELL,    0x2c) /* Long value, relative to __gp.  */
     72   RELOC_NUMBER (R_RX_RH_RELAX,     0x2d) /* Marks opcodes suitable for linker relaxation.  */
     73 
     74   /* These are for complex relocs.  */
     75   RELOC_NUMBER (R_RX_ABS32,        0x41)
     76   RELOC_NUMBER (R_RX_ABS24S,       0x42)
     77   RELOC_NUMBER (R_RX_ABS16,        0x43)
     78   RELOC_NUMBER (R_RX_ABS16U,       0x44)
     79   RELOC_NUMBER (R_RX_ABS16S,       0x45)
     80   RELOC_NUMBER (R_RX_ABS8,         0x46)
     81   RELOC_NUMBER (R_RX_ABS8U,        0x47)
     82   RELOC_NUMBER (R_RX_ABS8S,        0x48)
     83   RELOC_NUMBER (R_RX_ABS24S_PCREL, 0x49)
     84   RELOC_NUMBER (R_RX_ABS16S_PCREL, 0x4a)
     85   RELOC_NUMBER (R_RX_ABS8S_PCREL,  0x4b)
     86   RELOC_NUMBER (R_RX_ABS16UL,      0x4c)
     87   RELOC_NUMBER (R_RX_ABS16UW,      0x4d)
     88   RELOC_NUMBER (R_RX_ABS8UL,       0x4e)
     89   RELOC_NUMBER (R_RX_ABS8UW,       0x4f)
     90   RELOC_NUMBER (R_RX_ABS32_REV,    0x50)
     91   RELOC_NUMBER (R_RX_ABS16_REV,    0x51)
     92 
     93   RELOC_NUMBER (R_RX_SYM,          0x80)
     94   RELOC_NUMBER (R_RX_OPneg,        0x81)
     95   RELOC_NUMBER (R_RX_OPadd,        0x82)
     96   RELOC_NUMBER (R_RX_OPsub,        0x83)
     97   RELOC_NUMBER (R_RX_OPmul,        0x84)
     98   RELOC_NUMBER (R_RX_OPdiv,        0x85)
     99   RELOC_NUMBER (R_RX_OPshla,       0x86)
    100   RELOC_NUMBER (R_RX_OPshra,       0x87)
    101   RELOC_NUMBER (R_RX_OPsctsize,    0x88)
    102   RELOC_NUMBER (R_RX_OPscttop,     0x8d)
    103   RELOC_NUMBER (R_RX_OPand,        0x90)
    104   RELOC_NUMBER (R_RX_OPor,         0x91)
    105   RELOC_NUMBER (R_RX_OPxor,        0x92)
    106   RELOC_NUMBER (R_RX_OPnot,        0x93)
    107   RELOC_NUMBER (R_RX_OPmod,        0x94)
    108   RELOC_NUMBER (R_RX_OPromtop,     0x95)
    109   RELOC_NUMBER (R_RX_OPramtop,     0x96)
    110 
    111 END_RELOC_NUMBERS (R_RX_max)
    112 
    113 #define EF_RX_CPU_RX	0x00000079      /* FIXME: this collides with the E_FLAG_RX_... values below.  */
    114 #define EF_RX_CPU_MASK	0x0000007F	/* specific cpu bits.  */
    115 #define EF_RX_ALL_FLAGS	(EF_RX_CPU_MASK)
    116 
    117 /* Values for the e_flags field in the ELF header.  */
    118 #define E_FLAG_RX_64BIT_DOUBLES		(1 << 0)
    119 #define E_FLAG_RX_DSP			(1 << 1) /* Defined in the RX CPU Object file specification, but not explained. */
    120 #define E_FLAG_RX_PID			(1 << 2) /* Unofficial - DJ */
    121 #define E_FLAG_RX_ABI			(1 << 3) /* Binary passes stacked arguments using natural alignment.  Unofficial - NC.  */
    122 
    123 /* These define the addend field of R_RX_RH_RELAX relocations.  */
    124 #define	RX_RELAXA_IMM6	0x00000010	/* Imm8/16/24/32 at bit offset 6.  */
    125 #define	RX_RELAXA_IMM12	0x00000020	/* Imm8/16/24/32 at bit offset 12.  */
    126 #define	RX_RELAXA_DSP4	0x00000040	/* Dsp0/8/16 at bit offset 4.  */
    127 #define	RX_RELAXA_DSP6	0x00000080	/* Dsp0/8/16 at bit offset 6.  */
    128 #define	RX_RELAXA_DSP14	0x00000100	/* Dsp0/8/16 at bit offset 14.  */
    129 #define	RX_RELAXA_BRA	0x00000200	/* Any type of branch (must be decoded).  */
    130 #define RX_RELAXA_RNUM	0x0000000f	/* Number of associated relocations.  */
    131 /* These mark the place where alignment is requested, and the place where the filler bytes end.  */
    132 #define	RX_RELAXA_ALIGN	0x10000000	/* Start alignment; the remaining bits are the alignment value.  */
    133 #define	RX_RELAXA_ELIGN	0x20000000	/* End alignment; the remaining bits are the alignment value.  */
    134 #define	RX_RELAXA_ANUM	0x00ffffff	/* Alignment amount, in bytes (i.e. .balign).  */
    135 
    136 #endif /* _ELF_RX_H */
    137