1 /* Run-time dynamic linker data structures for loaded ELF shared objects.
2 Copyright (C) 2000-2014 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library. If not, see
17 <http://www.gnu.org/licenses/>. */
19 #ifndef _MIPS_LDSODEFS_H
20 #define _MIPS_LDSODEFS_H 1
24 struct La_mips_32_regs;
25 struct La_mips_32_retval;
26 struct La_mips_64_regs;
27 struct La_mips_64_retval;
29 #define ARCH_PLTENTER_MEMBERS \
30 Elf32_Addr (*mips_o32_gnu_pltenter) (Elf32_Sym *, unsigned int, \
31 uintptr_t *, uintptr_t *, \
32 struct La_mips_32_regs *, \
33 unsigned int *, const char *name, \
34 long int *framesizep); \
35 Elf32_Addr (*mips_n32_gnu_pltenter) (Elf32_Sym *, unsigned int, \
36 uintptr_t *, uintptr_t *, \
37 struct La_mips_64_regs *, \
38 unsigned int *, const char *name, \
39 long int *framesizep); \
40 Elf64_Addr (*mips_n64_gnu_pltenter) (Elf64_Sym *, unsigned int, \
41 uintptr_t *, uintptr_t *, \
42 struct La_mips_64_regs *, \
43 unsigned int *, const char *name, \
44 long int *framesizep);
46 #define ARCH_PLTEXIT_MEMBERS \
47 unsigned int (*mips_o32_gnu_pltexit) (Elf32_Sym *, unsigned int, \
48 uintptr_t *, uintptr_t *, \
49 const struct La_mips_32_regs *, \
50 struct La_mips_32_retval *, \
52 unsigned int (*mips_n32_gnu_pltexit) (Elf32_Sym *, unsigned int, \
53 uintptr_t *, uintptr_t *, \
54 const struct La_mips_64_regs *, \
55 struct La_mips_64_retval *, \
57 unsigned int (*mips_n64_gnu_pltexit) (Elf64_Sym *, unsigned int, \
58 uintptr_t *, uintptr_t *, \
59 const struct La_mips_64_regs *, \
60 struct La_mips_64_retval *, \
63 /* The MIPS ABI specifies that the dynamic section has to be read-only. */
65 #define DL_RO_DYN_SECTION 1
67 #include_next <ldsodefs.h>
69 /* The 64-bit MIPS ELF ABI uses an unusual reloc format. Each
70 relocation entry specifies up to three actual relocations, all at
71 the same address. The first relocation which required a symbol
72 uses the symbol in the r_sym field. The second relocation which
73 requires a symbol uses the symbol in the r_ssym field. If all
74 three relocations require a symbol, the third one uses a zero
77 We define these structures in internal headers because we're not
78 sure we want to make them part of the ABI yet. Eventually, some of
79 this may move into elf/elf.h. */
81 /* An entry in a 64 bit SHT_REL section. */
85 Elf32_Word r_sym; /* Symbol index */
86 unsigned char r_ssym; /* Special symbol for 2nd relocation */
87 unsigned char r_type3; /* 3rd relocation type */
88 unsigned char r_type2; /* 2nd relocation type */
89 unsigned char r_type1; /* 1st relocation type */
94 Elf64_Xword r_info_number;
95 _Elf64_Mips_R_Info r_info_fields;
96 } _Elf64_Mips_R_Info_union;
100 Elf64_Addr r_offset; /* Address */
101 _Elf64_Mips_R_Info_union r_info; /* Relocation type and symbol index */
106 Elf64_Addr r_offset; /* Address */
107 _Elf64_Mips_R_Info_union r_info; /* Relocation type and symbol index */
108 Elf64_Sxword r_addend; /* Addend */
111 #define ELF64_MIPS_R_SYM(i) \
112 ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_sym)
113 #define ELF64_MIPS_R_TYPE(i) \
114 (((_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_type1 \
115 | ((Elf32_Word)(__extension__ (_Elf64_Mips_R_Info_union)(i) \
116 ).r_info_fields.r_type2 << 8) \
117 | ((Elf32_Word)(__extension__ (_Elf64_Mips_R_Info_union)(i) \
118 ).r_info_fields.r_type3 << 16) \
119 | ((Elf32_Word)(__extension__ (_Elf64_Mips_R_Info_union)(i) \
120 ).r_info_fields.r_ssym << 24))
121 #define ELF64_MIPS_R_INFO(sym, type) \
122 (__extension__ (_Elf64_Mips_R_Info_union) \
123 (__extension__ (_Elf64_Mips_R_Info) \
124 { (sym), ELF64_MIPS_R_SSYM (type), \
125 ELF64_MIPS_R_TYPE3 (type), \
126 ELF64_MIPS_R_TYPE2 (type), \
127 ELF64_MIPS_R_TYPE1 (type) \
129 /* These macros decompose the value returned by ELF64_MIPS_R_TYPE, and
130 compose it back into a value that it can be used as an argument to
131 ELF64_MIPS_R_INFO. */
132 #define ELF64_MIPS_R_SSYM(i) (((i) >> 24) & 0xff)
133 #define ELF64_MIPS_R_TYPE3(i) (((i) >> 16) & 0xff)
134 #define ELF64_MIPS_R_TYPE2(i) (((i) >> 8) & 0xff)
135 #define ELF64_MIPS_R_TYPE1(i) ((i) & 0xff)
136 #define ELF64_MIPS_R_TYPEENC(type1, type2, type3, ssym) \
138 | ((Elf32_Word)(type2) << 8) \
139 | ((Elf32_Word)(type3) << 16) \
140 | ((Elf32_Word)(ssym) << 24))
143 #define ELF64_R_SYM(i) ELF64_MIPS_R_SYM (i)
145 #define ELF64_R_TYPE(i) ELF64_MIPS_R_TYPE (i)
147 #define ELF64_R_INFO(sym, type) ELF64_MIPS_R_INFO ((sym), (type))