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Diffstat (limited to 'sysdeps/mips/ldsodefs.h')
| -rw-r--r-- | sysdeps/mips/ldsodefs.h | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/sysdeps/mips/ldsodefs.h b/sysdeps/mips/ldsodefs.h new file mode 100644 index 0000000000..a70c565dd6 --- /dev/null +++ b/sysdeps/mips/ldsodefs.h @@ -0,0 +1,149 @@ +/* Run-time dynamic linker data structures for loaded ELF shared objects. + Copyright (C) 2000-2014 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <http://www.gnu.org/licenses/>. */ + +#ifndef _MIPS_LDSODEFS_H +#define _MIPS_LDSODEFS_H 1 + +#include <elf.h> + +struct La_mips_32_regs; +struct La_mips_32_retval; +struct La_mips_64_regs; +struct La_mips_64_retval; + +#define ARCH_PLTENTER_MEMBERS \ + Elf32_Addr (*mips_o32_gnu_pltenter) (Elf32_Sym *, unsigned int, \ + uintptr_t *, uintptr_t *, \ + struct La_mips_32_regs *, \ + unsigned int *, const char *name, \ + long int *framesizep); \ + Elf32_Addr (*mips_n32_gnu_pltenter) (Elf32_Sym *, unsigned int, \ + uintptr_t *, uintptr_t *, \ + struct La_mips_64_regs *, \ + unsigned int *, const char *name, \ + long int *framesizep); \ + Elf64_Addr (*mips_n64_gnu_pltenter) (Elf64_Sym *, unsigned int, \ + uintptr_t *, uintptr_t *, \ + struct La_mips_64_regs *, \ + unsigned int *, const char *name, \ + long int *framesizep); + +#define ARCH_PLTEXIT_MEMBERS \ + unsigned int (*mips_o32_gnu_pltexit) (Elf32_Sym *, unsigned int, \ + uintptr_t *, uintptr_t *, \ + const struct La_mips_32_regs *, \ + struct La_mips_32_retval *, \ + const char *); \ + unsigned int (*mips_n32_gnu_pltexit) (Elf32_Sym *, unsigned int, \ + uintptr_t *, uintptr_t *, \ + const struct La_mips_64_regs *, \ + struct La_mips_64_retval *, \ + const char *); \ + unsigned int (*mips_n64_gnu_pltexit) (Elf64_Sym *, unsigned int, \ + uintptr_t *, uintptr_t *, \ + const struct La_mips_64_regs *, \ + struct La_mips_64_retval *, \ + const char *); + +/* The MIPS ABI specifies that the dynamic section has to be read-only. */ + +#define DL_RO_DYN_SECTION 1 + +#include_next <ldsodefs.h> + +/* The 64-bit MIPS ELF ABI uses an unusual reloc format. Each + relocation entry specifies up to three actual relocations, all at + the same address. The first relocation which required a symbol + uses the symbol in the r_sym field. The second relocation which + requires a symbol uses the symbol in the r_ssym field. If all + three relocations require a symbol, the third one uses a zero + value. + + We define these structures in internal headers because we're not + sure we want to make them part of the ABI yet. Eventually, some of + this may move into elf/elf.h. */ + +/* An entry in a 64 bit SHT_REL section. */ + +typedef struct +{ + Elf32_Word r_sym; /* Symbol index */ + unsigned char r_ssym; /* Special symbol for 2nd relocation */ + unsigned char r_type3; /* 3rd relocation type */ + unsigned char r_type2; /* 2nd relocation type */ + unsigned char r_type1; /* 1st relocation type */ +} _Elf64_Mips_R_Info; + +typedef union +{ + Elf64_Xword r_info_number; + _Elf64_Mips_R_Info r_info_fields; +} _Elf64_Mips_R_Info_union; + +typedef struct +{ + Elf64_Addr r_offset; /* Address */ + _Elf64_Mips_R_Info_union r_info; /* Relocation type and symbol index */ +} Elf64_Mips_Rel; + +typedef struct +{ + Elf64_Addr r_offset; /* Address */ + _Elf64_Mips_R_Info_union r_info; /* Relocation type and symbol index */ + Elf64_Sxword r_addend; /* Addend */ +} Elf64_Mips_Rela; + +#define ELF64_MIPS_R_SYM(i) \ + ((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_sym) +#define ELF64_MIPS_R_TYPE(i) \ + (((_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_type1 \ + | ((Elf32_Word)(__extension__ (_Elf64_Mips_R_Info_union)(i) \ + ).r_info_fields.r_type2 << 8) \ + | ((Elf32_Word)(__extension__ (_Elf64_Mips_R_Info_union)(i) \ + ).r_info_fields.r_type3 << 16) \ + | ((Elf32_Word)(__extension__ (_Elf64_Mips_R_Info_union)(i) \ + ).r_info_fields.r_ssym << 24)) +#define ELF64_MIPS_R_INFO(sym, type) \ + (__extension__ (_Elf64_Mips_R_Info_union) \ + (__extension__ (_Elf64_Mips_R_Info) \ + { (sym), ELF64_MIPS_R_SSYM (type), \ + ELF64_MIPS_R_TYPE3 (type), \ + ELF64_MIPS_R_TYPE2 (type), \ + ELF64_MIPS_R_TYPE1 (type) \ + }).r_info_number) +/* These macros decompose the value returned by ELF64_MIPS_R_TYPE, and + compose it back into a value that it can be used as an argument to + ELF64_MIPS_R_INFO. */ +#define ELF64_MIPS_R_SSYM(i) (((i) >> 24) & 0xff) +#define ELF64_MIPS_R_TYPE3(i) (((i) >> 16) & 0xff) +#define ELF64_MIPS_R_TYPE2(i) (((i) >> 8) & 0xff) +#define ELF64_MIPS_R_TYPE1(i) ((i) & 0xff) +#define ELF64_MIPS_R_TYPEENC(type1, type2, type3, ssym) \ + ((type1) \ + | ((Elf32_Word)(type2) << 8) \ + | ((Elf32_Word)(type3) << 16) \ + | ((Elf32_Word)(ssym) << 24)) + +#undef ELF64_R_SYM +#define ELF64_R_SYM(i) ELF64_MIPS_R_SYM (i) +#undef ELF64_R_TYPE +#define ELF64_R_TYPE(i) ELF64_MIPS_R_TYPE (i) +#undef ELF64_R_INFO +#define ELF64_R_INFO(sym, type) ELF64_MIPS_R_INFO ((sym), (type)) + +#endif |