1 /* MC68k ELF support for BFD.
2 Copyright (C) 1998-2022 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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. */
23 #include "elf/reloc-macros.h"
25 /* Relocation types. */
26 START_RELOC_NUMBERS (elf_m68k_reloc_type
)
27 RELOC_NUMBER (R_68K_NONE
, 0) /* No reloc */
28 RELOC_NUMBER (R_68K_32
, 1) /* Direct 32 bit */
29 RELOC_NUMBER (R_68K_16
, 2) /* Direct 16 bit */
30 RELOC_NUMBER (R_68K_8
, 3) /* Direct 8 bit */
31 RELOC_NUMBER (R_68K_PC32
, 4) /* PC relative 32 bit */
32 RELOC_NUMBER (R_68K_PC16
, 5) /* PC relative 16 bit */
33 RELOC_NUMBER (R_68K_PC8
, 6) /* PC relative 8 bit */
34 RELOC_NUMBER (R_68K_GOT32
, 7) /* 32 bit PC relative GOT entry */
35 RELOC_NUMBER (R_68K_GOT16
, 8) /* 16 bit PC relative GOT entry */
36 RELOC_NUMBER (R_68K_GOT8
, 9) /* 8 bit PC relative GOT entry */
37 RELOC_NUMBER (R_68K_GOT32O
, 10) /* 32 bit GOT offset */
38 RELOC_NUMBER (R_68K_GOT16O
, 11) /* 16 bit GOT offset */
39 RELOC_NUMBER (R_68K_GOT8O
, 12) /* 8 bit GOT offset */
40 RELOC_NUMBER (R_68K_PLT32
, 13) /* 32 bit PC relative PLT address */
41 RELOC_NUMBER (R_68K_PLT16
, 14) /* 16 bit PC relative PLT address */
42 RELOC_NUMBER (R_68K_PLT8
, 15) /* 8 bit PC relative PLT address */
43 RELOC_NUMBER (R_68K_PLT32O
, 16) /* 32 bit PLT offset */
44 RELOC_NUMBER (R_68K_PLT16O
, 17) /* 16 bit PLT offset */
45 RELOC_NUMBER (R_68K_PLT8O
, 18) /* 8 bit PLT offset */
46 RELOC_NUMBER (R_68K_COPY
, 19) /* Copy symbol at runtime */
47 RELOC_NUMBER (R_68K_GLOB_DAT
, 20) /* Create GOT entry */
48 RELOC_NUMBER (R_68K_JMP_SLOT
, 21) /* Create PLT entry */
49 RELOC_NUMBER (R_68K_RELATIVE
, 22) /* Adjust by program base */
50 /* These are GNU extensions to enable C++ vtable garbage collection. */
51 RELOC_NUMBER (R_68K_GNU_VTINHERIT
, 23)
52 RELOC_NUMBER (R_68K_GNU_VTENTRY
, 24)
53 /* TLS static relocations. */
54 RELOC_NUMBER (R_68K_TLS_GD32
, 25)
55 RELOC_NUMBER (R_68K_TLS_GD16
, 26)
56 RELOC_NUMBER (R_68K_TLS_GD8
, 27)
57 RELOC_NUMBER (R_68K_TLS_LDM32
, 28)
58 RELOC_NUMBER (R_68K_TLS_LDM16
, 29)
59 RELOC_NUMBER (R_68K_TLS_LDM8
, 30)
60 RELOC_NUMBER (R_68K_TLS_LDO32
, 31)
61 RELOC_NUMBER (R_68K_TLS_LDO16
, 32)
62 RELOC_NUMBER (R_68K_TLS_LDO8
, 33)
63 RELOC_NUMBER (R_68K_TLS_IE32
, 34)
64 RELOC_NUMBER (R_68K_TLS_IE16
, 35)
65 RELOC_NUMBER (R_68K_TLS_IE8
, 36)
66 RELOC_NUMBER (R_68K_TLS_LE32
, 37)
67 RELOC_NUMBER (R_68K_TLS_LE16
, 38)
68 RELOC_NUMBER (R_68K_TLS_LE8
, 39)
69 RELOC_NUMBER (R_68K_TLS_DTPMOD32
, 40)
70 RELOC_NUMBER (R_68K_TLS_DTPREL32
, 41)
71 RELOC_NUMBER (R_68K_TLS_TPREL32
, 42)
72 END_RELOC_NUMBERS (R_68K_max
)
74 /* We use the top 24 bits to encode information about the
75 architecture variant. */
76 #define EF_M68K_CPU32 0x00810000
77 #define EF_M68K_M68000 0x01000000
78 #define EF_M68K_CFV4E 0x00008000
79 #define EF_M68K_FIDO 0x02000000
80 #define EF_M68K_ARCH_MASK \
81 (EF_M68K_M68000 | EF_M68K_CPU32 | EF_M68K_CFV4E | EF_M68K_FIDO)
83 /* We use the bottom 8 bits to encode information about the
84 coldfire variant. If we use any of these bits, the top 24 bits are
85 either 0 or EF_M68K_CFV4E. */
86 #define EF_M68K_CF_ISA_MASK 0x0F /* Which ISA */
87 #define EF_M68K_CF_ISA_A_NODIV 0x01 /* ISA A except for div */
88 #define EF_M68K_CF_ISA_A 0x02
89 #define EF_M68K_CF_ISA_A_PLUS 0x03
90 #define EF_M68K_CF_ISA_B_NOUSP 0x04 /* ISA_B except for USP */
91 #define EF_M68K_CF_ISA_B 0x05
92 #define EF_M68K_CF_ISA_C 0x06
93 #define EF_M68K_CF_ISA_C_NODIV 0x07 /* ISA C except for div */
94 #define EF_M68K_CF_MAC_MASK 0x30
95 #define EF_M68K_CF_MAC 0x10 /* MAC */
96 #define EF_M68K_CF_EMAC 0x20 /* EMAC */
97 #define EF_M68K_CF_EMAC_B 0x30 /* EMAC_B */
98 #define EF_M68K_CF_FLOAT 0x40 /* Has float insns */
99 #define EF_M68K_CF_MASK 0xFF
101 /* GNU object attribute tags. */
104 /* 0-3 are generic. */
106 /* FP ABI, low 2 bits:
107 1 for double precision hard-float,
109 0 for not tagged or not using any ABIs affected by the differences. */
110 Tag_GNU_M68K_ABI_FP
= 4,