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1 | /* Run-time dynamic linker data structures for loaded ELF shared objects. | |
2 | Copyright (C) 2000, 2002, 2003 Free Software Foundation, Inc. | |
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 | |
16 | License along with the GNU C Library; if not, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. */ | |
19 | ||
20 | #ifndef _MIPS_LDSODEFS_H | |
21 | #define _MIPS_LDSODEFS_H | |
22 | ||
23 | /* The MIPS ABI specifies that the dynamic section has to be read-only. */ | |
24 | ||
25 | #define DL_RO_DYN_SECTION 1 | |
26 | ||
27 | #include_next <ldsodefs.h> | |
28 | ||
29 | /* The 64-bit MIPS ELF ABI uses an unusual reloc format. Each | |
30 | relocation entry specifies up to three actual relocations, all at | |
31 | the same address. The first relocation which required a symbol | |
32 | uses the symbol in the r_sym field. The second relocation which | |
33 | requires a symbol uses the symbol in the r_ssym field. If all | |
34 | three relocations require a symbol, the third one uses a zero | |
35 | value. | |
36 | ||
37 | We define these structures in internal headers because we're not | |
38 | sure we want to make them part of the ABI yet. Eventually, some of | |
39 | this may move into elf/elf.h. */ | |
40 | ||
41 | /* An entry in a 64 bit SHT_REL section. */ | |
42 | ||
43 | typedef struct | |
44 | { | |
45 | Elf32_Word r_sym; /* Symbol index */ | |
46 | unsigned char r_ssym; /* Special symbol for 2nd relocation */ | |
47 | unsigned char r_type3; /* 3rd relocation type */ | |
48 | unsigned char r_type2; /* 2nd relocation type */ | |
49 | unsigned char r_type1; /* 1st relocation type */ | |
50 | } _Elf64_Mips_R_Info; | |
51 | ||
52 | typedef union | |
53 | { | |
54 | Elf64_Xword r_info_number; | |
55 | _Elf64_Mips_R_Info r_info_fields; | |
56 | } _Elf64_Mips_R_Info_union; | |
57 | ||
58 | typedef struct | |
59 | { | |
60 | Elf64_Addr r_offset; /* Address */ | |
61 | _Elf64_Mips_R_Info_union r_info; /* Relocation type and symbol index */ | |
62 | } Elf64_Mips_Rel; | |
63 | ||
64 | typedef struct | |
65 | { | |
66 | Elf64_Addr r_offset; /* Address */ | |
67 | _Elf64_Mips_R_Info_union r_info; /* Relocation type and symbol index */ | |
68 | Elf64_Sxword r_addend; /* Addend */ | |
69 | } Elf64_Mips_Rela; | |
70 | ||
71 | #define ELF64_MIPS_R_SYM(i) \ | |
72 | ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_sym) | |
73 | #define ELF64_MIPS_R_TYPE(i) \ | |
74 | (((_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_type1 \ | |
75 | | ((Elf32_Word)(__extension__ (_Elf64_Mips_R_Info_union)(i) \ | |
76 | ).r_info_fields.r_type2 << 8) \ | |
77 | | ((Elf32_Word)(__extension__ (_Elf64_Mips_R_Info_union)(i) \ | |
78 | ).r_info_fields.r_type3 << 16) \ | |
79 | | ((Elf32_Word)(__extension__ (_Elf64_Mips_R_Info_union)(i) \ | |
80 | ).r_info_fields.r_ssym << 24)) | |
81 | #define ELF64_MIPS_R_INFO(sym, type) \ | |
82 | (__extension__ (_Elf64_Mips_R_Info_union) \ | |
83 | (__extension__ (_Elf64_Mips_R_Info) \ | |
84 | { (sym), ELF64_MIPS_R_SSYM (type), \ | |
85 | ELF64_MIPS_R_TYPE3 (type), \ | |
86 | ELF64_MIPS_R_TYPE2 (type), \ | |
87 | ELF64_MIPS_R_TYPE1 (type) \ | |
88 | }).r_info_number) | |
89 | /* These macros decompose the value returned by ELF64_MIPS_R_TYPE, and | |
90 | compose it back into a value that it can be used as an argument to | |
91 | ELF64_MIPS_R_INFO. */ | |
92 | #define ELF64_MIPS_R_SSYM(i) (((i) >> 24) & 0xff) | |
93 | #define ELF64_MIPS_R_TYPE3(i) (((i) >> 16) & 0xff) | |
94 | #define ELF64_MIPS_R_TYPE2(i) (((i) >> 8) & 0xff) | |
95 | #define ELF64_MIPS_R_TYPE1(i) ((i) & 0xff) | |
96 | #define ELF64_MIPS_R_TYPEENC(type1, type2, type3, ssym) \ | |
97 | ((type1) \ | |
98 | | ((Elf32_Word)(type2) << 8) \ | |
99 | | ((Elf32_Word)(type3) << 16) \ | |
100 | | ((Elf32_Word)(ssym) << 24)) | |
101 | ||
102 | #undef ELF64_R_SYM | |
103 | #define ELF64_R_SYM(i) ELF64_MIPS_R_SYM (i) | |
104 | #undef ELF64_R_TYPE | |
105 | #define ELF64_R_TYPE(i) ELF64_MIPS_R_TYPE (i) | |
106 | #undef ELF64_R_INFO | |
107 | #define ELF64_R_INFO(sym, type) ELF64_MIPS_R_INFO ((sym), (type)) | |
108 | ||
109 | #endif |