/* Run-time dynamic linker data structures for loaded ELF shared objects.
- Copyright (C) 2006 Free Software Foundation, Inc.
+ Copyright (C) 2000-2024 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
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, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
+ License along with the GNU C Library. If not, see
+ <https://www.gnu.org/licenses/>. */
-#ifndef __LDSODEFS_H \
+#ifndef _MIPS_LDSODEFS_H
#define _MIPS_LDSODEFS_H 1
#include <elf.h>
struct La_mips_64_regs;
struct La_mips_64_retval;
+/* Translate a processor specific dynamic tag to the index
+ in l_info array. */
+#define DT_MIPS(x) (DT_MIPS_##x - DT_LOPROC + DT_NUM)
+
+#define ELF_MACHINE_GNU_HASH_ADDRIDX (DT_MIPS_XHASH - DT_LOPROC + DT_NUM)
+
+/* Calculate the index of a symbol in MIPS xhash. */
+#define ELF_MACHINE_HASH_SYMIDX(map, hasharr) \
+ ((map)->l_mach.mips_xlat_zero[(hasharr) - (map)->l_gnu_chain_zero])
+
+/* Setup MIPS xhash. */
+#define ELF_MACHINE_XHASH_SETUP(hash32, symbias, map) \
+ do \
+ { \
+ (hash32) += (map)->l_info[DT_MIPS (SYMTABNO)]->d_un.d_val - (symbias); \
+ (map)->l_mach.mips_xlat_zero = (hash32) - (symbias); \
+ } \
+ while (0)
+
#define ARCH_PLTENTER_MEMBERS \
Elf32_Addr (*mips_o32_gnu_pltenter) (Elf32_Sym *, unsigned int, \
uintptr_t *, uintptr_t *, \
- const struct La_mips_32_regs *, \
+ 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 *, \
- const struct La_mips_64_regs *, \
+ 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 *, \
- const struct La_mips_64_regs *, \
+ struct La_mips_64_regs *, \
unsigned int *, const char *name, \
long int *framesizep);
#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
projects / platform / upstream / glibc.git / blobdiff