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19723bdd | 1 | /* Run-time dynamic linker data structures for loaded ELF shared objects. |
2caa93e2 | 2 | Copyright (C) 2000, 2002, 2003, 2006, 2007 Free Software Foundation, Inc. |
19723bdd DJ |
3 | This file is part of the GNU C Library. |
4 | ||
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. | |
9 | ||
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. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
ab84e3ff PE |
16 | License along with the GNU C Library. If not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
19723bdd | 18 | |
2caa93e2 | 19 | #ifndef _MIPS_LDSODEFS_H |
19723bdd DJ |
20 | #define _MIPS_LDSODEFS_H 1 |
21 | ||
22 | #include <elf.h> | |
23 | ||
24 | struct La_mips_32_regs; | |
25 | struct La_mips_32_retval; | |
26 | struct La_mips_64_regs; | |
27 | struct La_mips_64_retval; | |
28 | ||
29 | #define ARCH_PLTENTER_MEMBERS \ | |
30 | Elf32_Addr (*mips_o32_gnu_pltenter) (Elf32_Sym *, unsigned int, \ | |
31 | uintptr_t *, uintptr_t *, \ | |
30f69637 | 32 | struct La_mips_32_regs *, \ |
19723bdd DJ |
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 *, \ | |
30f69637 | 37 | struct La_mips_64_regs *, \ |
19723bdd DJ |
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 *, \ | |
30f69637 | 42 | struct La_mips_64_regs *, \ |
19723bdd DJ |
43 | unsigned int *, const char *name, \ |
44 | long int *framesizep); | |
45 | ||
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 *, \ | |
51 | const char *); \ | |
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 *, \ | |
56 | const char *); \ | |
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 *, \ | |
61 | const char *); | |
62 | ||
2caa93e2 DJ |
63 | /* The MIPS ABI specifies that the dynamic section has to be read-only. */ |
64 | ||
65 | #define DL_RO_DYN_SECTION 1 | |
66 | ||
19723bdd DJ |
67 | #include_next <ldsodefs.h> |
68 | ||
2caa93e2 DJ |
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 | |
75 | value. | |
76 | ||
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. */ | |
80 | ||
81 | /* An entry in a 64 bit SHT_REL section. */ | |
82 | ||
83 | typedef struct | |
84 | { | |
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 */ | |
90 | } _Elf64_Mips_R_Info; | |
91 | ||
92 | typedef union | |
93 | { | |
94 | Elf64_Xword r_info_number; | |
95 | _Elf64_Mips_R_Info r_info_fields; | |
96 | } _Elf64_Mips_R_Info_union; | |
97 | ||
98 | typedef struct | |
99 | { | |
100 | Elf64_Addr r_offset; /* Address */ | |
101 | _Elf64_Mips_R_Info_union r_info; /* Relocation type and symbol index */ | |
102 | } Elf64_Mips_Rel; | |
103 | ||
104 | typedef struct | |
105 | { | |
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 */ | |
109 | } Elf64_Mips_Rela; | |
110 | ||
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) \ | |
128 | }).r_info_number) | |
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) \ | |
137 | ((type1) \ | |
138 | | ((Elf32_Word)(type2) << 8) \ | |
139 | | ((Elf32_Word)(type3) << 16) \ | |
140 | | ((Elf32_Word)(ssym) << 24)) | |
141 | ||
142 | #undef ELF64_R_SYM | |
143 | #define ELF64_R_SYM(i) ELF64_MIPS_R_SYM (i) | |
144 | #undef ELF64_R_TYPE | |
145 | #define ELF64_R_TYPE(i) ELF64_MIPS_R_TYPE (i) | |
146 | #undef ELF64_R_INFO | |
147 | #define ELF64_R_INFO(sym, type) ELF64_MIPS_R_INFO ((sym), (type)) | |
148 | ||
19723bdd | 149 | #endif |