165 lines
6.0 KiB
C
165 lines
6.0 KiB
C
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/* Run-time dynamic linker data structures for loaded ELF shared objects.
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Copyright (C) 2000-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _MIPS_LDSODEFS_H
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#define _MIPS_LDSODEFS_H 1
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#include <elf.h>
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struct La_mips_32_regs;
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struct La_mips_32_retval;
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struct La_mips_64_regs;
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struct La_mips_64_retval;
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/* Translate a processor specific dynamic tag to the index
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in l_info array. */
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#define DT_MIPS(x) (DT_MIPS_##x - DT_LOPROC + DT_NUM)
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#define ELF_MACHINE_GNU_HASH_ADDRIDX (DT_MIPS_XHASH - DT_LOPROC + DT_NUM)
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/* Calculate the index of a symbol in MIPS xhash. */
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#define ELF_MACHINE_HASH_SYMIDX(map, hasharr) \
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((map)->l_mach.mips_xlat_zero[(hasharr) - (map)->l_gnu_chain_zero])
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/* Setup MIPS xhash. */
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#define ELF_MACHINE_XHASH_SETUP(hash32, symbias, map) \
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do \
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{ \
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(hash32) += (map)->l_info[DT_MIPS (SYMTABNO)]->d_un.d_val - (symbias); \
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(map)->l_mach.mips_xlat_zero = (hash32) - (symbias); \
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} \
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while (0)
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#define ARCH_PLTENTER_MEMBERS \
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Elf32_Addr (*mips_o32_gnu_pltenter) (Elf32_Sym *, unsigned int, \
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uintptr_t *, uintptr_t *, \
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struct La_mips_32_regs *, \
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unsigned int *, const char *name, \
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long int *framesizep); \
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Elf32_Addr (*mips_n32_gnu_pltenter) (Elf32_Sym *, unsigned int, \
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uintptr_t *, uintptr_t *, \
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struct La_mips_64_regs *, \
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unsigned int *, const char *name, \
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long int *framesizep); \
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Elf64_Addr (*mips_n64_gnu_pltenter) (Elf64_Sym *, unsigned int, \
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uintptr_t *, uintptr_t *, \
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struct La_mips_64_regs *, \
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unsigned int *, const char *name, \
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long int *framesizep);
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#define ARCH_PLTEXIT_MEMBERS \
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unsigned int (*mips_o32_gnu_pltexit) (Elf32_Sym *, unsigned int, \
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uintptr_t *, uintptr_t *, \
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const struct La_mips_32_regs *, \
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struct La_mips_32_retval *, \
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const char *); \
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unsigned int (*mips_n32_gnu_pltexit) (Elf32_Sym *, unsigned int, \
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uintptr_t *, uintptr_t *, \
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const struct La_mips_64_regs *, \
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struct La_mips_64_retval *, \
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const char *); \
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unsigned int (*mips_n64_gnu_pltexit) (Elf64_Sym *, unsigned int, \
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uintptr_t *, uintptr_t *, \
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const struct La_mips_64_regs *, \
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struct La_mips_64_retval *, \
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const char *);
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#include_next <ldsodefs.h>
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/* The 64-bit MIPS ELF ABI uses an unusual reloc format. Each
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relocation entry specifies up to three actual relocations, all at
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the same address. The first relocation which required a symbol
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uses the symbol in the r_sym field. The second relocation which
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requires a symbol uses the symbol in the r_ssym field. If all
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three relocations require a symbol, the third one uses a zero
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value.
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We define these structures in internal headers because we're not
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sure we want to make them part of the ABI yet. Eventually, some of
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this may move into elf/elf.h. */
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/* An entry in a 64 bit SHT_REL section. */
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typedef struct
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{
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Elf32_Word r_sym; /* Symbol index */
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unsigned char r_ssym; /* Special symbol for 2nd relocation */
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unsigned char r_type3; /* 3rd relocation type */
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unsigned char r_type2; /* 2nd relocation type */
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unsigned char r_type1; /* 1st relocation type */
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} _Elf64_Mips_R_Info;
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typedef union
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{
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Elf64_Xword r_info_number;
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_Elf64_Mips_R_Info r_info_fields;
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} _Elf64_Mips_R_Info_union;
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typedef struct
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{
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Elf64_Addr r_offset; /* Address */
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_Elf64_Mips_R_Info_union r_info; /* Relocation type and symbol index */
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} Elf64_Mips_Rel;
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typedef struct
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{
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Elf64_Addr r_offset; /* Address */
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_Elf64_Mips_R_Info_union r_info; /* Relocation type and symbol index */
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Elf64_Sxword r_addend; /* Addend */
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} Elf64_Mips_Rela;
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#define ELF64_MIPS_R_SYM(i) \
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((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_sym)
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#define ELF64_MIPS_R_TYPE(i) \
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(((_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_type1 \
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| ((Elf32_Word)(__extension__ (_Elf64_Mips_R_Info_union)(i) \
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).r_info_fields.r_type2 << 8) \
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| ((Elf32_Word)(__extension__ (_Elf64_Mips_R_Info_union)(i) \
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).r_info_fields.r_type3 << 16) \
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| ((Elf32_Word)(__extension__ (_Elf64_Mips_R_Info_union)(i) \
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).r_info_fields.r_ssym << 24))
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#define ELF64_MIPS_R_INFO(sym, type) \
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(__extension__ (_Elf64_Mips_R_Info_union) \
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(__extension__ (_Elf64_Mips_R_Info) \
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{ (sym), ELF64_MIPS_R_SSYM (type), \
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ELF64_MIPS_R_TYPE3 (type), \
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ELF64_MIPS_R_TYPE2 (type), \
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ELF64_MIPS_R_TYPE1 (type) \
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}).r_info_number)
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/* These macros decompose the value returned by ELF64_MIPS_R_TYPE, and
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compose it back into a value that it can be used as an argument to
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ELF64_MIPS_R_INFO. */
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#define ELF64_MIPS_R_SSYM(i) (((i) >> 24) & 0xff)
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#define ELF64_MIPS_R_TYPE3(i) (((i) >> 16) & 0xff)
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#define ELF64_MIPS_R_TYPE2(i) (((i) >> 8) & 0xff)
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#define ELF64_MIPS_R_TYPE1(i) ((i) & 0xff)
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#define ELF64_MIPS_R_TYPEENC(type1, type2, type3, ssym) \
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((type1) \
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| ((Elf32_Word)(type2) << 8) \
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| ((Elf32_Word)(type3) << 16) \
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| ((Elf32_Word)(ssym) << 24))
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#undef ELF64_R_SYM
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#define ELF64_R_SYM(i) ELF64_MIPS_R_SYM (i)
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#undef ELF64_R_TYPE
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#define ELF64_R_TYPE(i) ELF64_MIPS_R_TYPE (i)
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#undef ELF64_R_INFO
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#define ELF64_R_INFO(sym, type) ELF64_MIPS_R_INFO ((sym), (type))
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#endif
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