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-rw-r--r--sysdeps/mips/dl-machine.h777
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diff --git a/sysdeps/mips/dl-machine.h b/sysdeps/mips/dl-machine.h
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--- a/sysdeps/mips/dl-machine.h
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@@ -1,777 +0,0 @@
-/* Machine-dependent ELF dynamic relocation inline functions. MIPS version.
- Copyright (C) 1996-2001, 2002, 2003, 2004 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Kazumoto Kojima <kkojima@info.kanagawa-u.ac.jp>.
-
- 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, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-/* FIXME: Profiling of shared libraries is not implemented yet. */
-#ifndef dl_machine_h
-#define dl_machine_h
-
-#define ELF_MACHINE_NAME "MIPS"
-
-#define ELF_MACHINE_NO_PLT
-
-#include <entry.h>
-
-#ifndef ENTRY_POINT
-#error ENTRY_POINT needs to be defined for MIPS.
-#endif
-
-#include <sgidefs.h>
-#include <sys/asm.h>
-
-/* The offset of gp from GOT might be system-dependent. It's set by
- ld. The same value is also */
-#define OFFSET_GP_GOT 0x7ff0
-
-#ifndef _RTLD_PROLOGUE
-# define _RTLD_PROLOGUE(entry) \
- ".globl\t" __STRING(entry) "\n\t" \
- ".ent\t" __STRING(entry) "\n\t" \
- ".type\t" __STRING(entry) ", @function\n" \
- __STRING(entry) ":\n\t"
-#endif
-
-#ifndef _RTLD_EPILOGUE
-# define _RTLD_EPILOGUE(entry) \
- ".end\t" __STRING(entry) "\n\t" \
- ".size\t" __STRING(entry) ", . - " __STRING(entry) "\n\t"
-#endif
-
-/* A reloc type used for ld.so cmdline arg lookups to reject PLT entries.
- This makes no sense on MIPS but we have to define this to R_MIPS_REL32
- to avoid the asserts in dl-lookup.c from blowing. */
-#define ELF_MACHINE_JMP_SLOT R_MIPS_REL32
-#define elf_machine_type_class(type) ELF_RTYPE_CLASS_PLT
-
-/* Translate a processor specific dynamic tag to the index
- in l_info array. */
-#define DT_MIPS(x) (DT_MIPS_##x - DT_LOPROC + DT_NUM)
-
-/* If there is a DT_MIPS_RLD_MAP entry in the dynamic section, fill it in
- with the run-time address of the r_debug structure */
-#define ELF_MACHINE_DEBUG_SETUP(l,r) \
-do { if ((l)->l_info[DT_MIPS (RLD_MAP)]) \
- *(ElfW(Addr) *)((l)->l_info[DT_MIPS (RLD_MAP)]->d_un.d_ptr) = \
- (ElfW(Addr)) (r); \
- } while (0)
-
-/* Return nonzero iff ELF header is compatible with the running host. */
-static inline int __attribute_used__
-elf_machine_matches_host (const ElfW(Ehdr) *ehdr)
-{
-#if _MIPS_SIM == _ABIO32 || _MIPS_SIM == _ABIN32
- /* Don't link o32 and n32 together. */
- if (((ehdr->e_flags & EF_MIPS_ABI2) != 0) != (_MIPS_SIM == _ABIN32))
- return 0;
-#endif
-
- switch (ehdr->e_machine)
- {
- case EM_MIPS:
- case EM_MIPS_RS3_LE:
- return 1;
- default:
- return 0;
- }
-}
-
-static inline ElfW(Addr) *
-elf_mips_got_from_gpreg (ElfW(Addr) gpreg)
-{
- /* FIXME: the offset of gp from GOT may be system-dependent. */
- return (ElfW(Addr) *) (gpreg - OFFSET_GP_GOT);
-}
-
-/* Return the link-time address of _DYNAMIC. Conveniently, this is the
- first element of the GOT. This must be inlined in a function which
- uses global data. We assume its $gp points to the primary GOT. */
-static inline ElfW(Addr)
-elf_machine_dynamic (void)
-{
- register ElfW(Addr) gp __asm__ ("$28");
- return *elf_mips_got_from_gpreg (gp);
-}
-
-#define STRINGXP(X) __STRING(X)
-#define STRINGXV(X) STRINGV_(X)
-#define STRINGV_(...) # __VA_ARGS__
-
-/* Return the run-time load address of the shared object. */
-static inline ElfW(Addr)
-elf_machine_load_address (void)
-{
- ElfW(Addr) addr;
- asm (" .set noreorder\n"
- " " STRINGXP (PTR_LA) " %0, 0f\n"
- " bltzal $0, 0f\n"
- " nop\n"
- "0: " STRINGXP (PTR_SUBU) " %0, $31, %0\n"
- " .set reorder\n"
- : "=r" (addr)
- : /* No inputs */
- : "$31");
- return addr;
-}
-
-/* The MSB of got[1] of a gnu object is set to identify gnu objects. */
-#if _MIPS_SIM == _ABI64
-# define ELF_MIPS_GNU_GOT1_MASK 0x8000000000000000L
-#else
-# define ELF_MIPS_GNU_GOT1_MASK 0x80000000L
-#endif
-
-/* We can't rely on elf_machine_got_rel because _dl_object_relocation_scope
- fiddles with global data. */
-#define ELF_MACHINE_BEFORE_RTLD_RELOC(dynamic_info) \
-do { \
- struct link_map *map = &bootstrap_map; \
- ElfW(Sym) *sym; \
- ElfW(Addr) *got; \
- int i, n; \
- \
- got = (ElfW(Addr) *) D_PTR (map, l_info[DT_PLTGOT]); \
- \
- if (__builtin_expect (map->l_addr == 0, 1)) \
- break; \
- \
- /* got[0] is reserved. got[1] is also reserved for the dynamic object \
- generated by gnu ld. Skip these reserved entries from \
- relocation. */ \
- i = (got[1] & ELF_MIPS_GNU_GOT1_MASK)? 2 : 1; \
- n = map->l_info[DT_MIPS (LOCAL_GOTNO)]->d_un.d_val; \
- \
- /* Add the run-time displacement to all local got entries. */ \
- while (i < n) \
- got[i++] += map->l_addr; \
- \
- /* Handle global got entries. */ \
- got += n; \
- sym = (ElfW(Sym) *) D_PTR(map, l_info[DT_SYMTAB]) \
- + map->l_info[DT_MIPS (GOTSYM)]->d_un.d_val; \
- i = (map->l_info[DT_MIPS (SYMTABNO)]->d_un.d_val \
- - map->l_info[DT_MIPS (GOTSYM)]->d_un.d_val); \
- \
- while (i--) \
- { \
- if (sym->st_shndx == SHN_UNDEF || sym->st_shndx == SHN_COMMON) \
- *got = map->l_addr + sym->st_value; \
- else if (ELFW(ST_TYPE) (sym->st_info) == STT_FUNC \
- && *got != sym->st_value) \
- *got += map->l_addr; \
- else if (ELFW(ST_TYPE) (sym->st_info) == STT_SECTION) \
- { \
- if (sym->st_other == 0) \
- *got += map->l_addr; \
- } \
- else \
- *got = map->l_addr + sym->st_value; \
- \
- got++; \
- sym++; \
- } \
-} while(0)
-
-
-/* Get link map for callers object containing STUB_PC. */
-static inline struct link_map *
-elf_machine_runtime_link_map (ElfW(Addr) gpreg, ElfW(Addr) stub_pc)
-{
- extern int _dl_mips_gnu_objects;
-
- /* got[1] is reserved to keep its link map address for the shared
- object generated by the gnu linker. If all are such objects, we
- can find the link map from current GPREG simply. If not so, get
- the link map for caller's object containing STUB_PC. */
-
- if (_dl_mips_gnu_objects)
- {
- ElfW(Addr) *got = elf_mips_got_from_gpreg (gpreg);
- ElfW(Word) g1;
-
- g1 = ((ElfW(Word) *) got)[1];
-
- if ((g1 & ELF_MIPS_GNU_GOT1_MASK) != 0)
- {
- struct link_map *l =
- (struct link_map *) (g1 & ~ELF_MIPS_GNU_GOT1_MASK);
- ElfW(Addr) base, limit;
- const ElfW(Phdr) *p = l->l_phdr;
- ElfW(Half) this, nent = l->l_phnum;
-
- /* For the common case of a stub being called from the containing
- object, STUB_PC will point to somewhere within the object that
- is described by the link map fetched via got[1]. Otherwise we
- have to scan all maps. */
- for (this = 0; this < nent; this++)
- {
- if (p[this].p_type == PT_LOAD)
- {
- base = p[this].p_vaddr + l->l_addr;
- limit = base + p[this].p_memsz;
- if (stub_pc >= base && stub_pc < limit)
- return l;
- }
- }
- }
- }
-
- struct link_map *l;
- Lmid_t nsid;
-
- for (nsid = 0; nsid < DL_NNS; ++nsid)
- for (l = GL(dl_ns)[nsid]._ns_loaded; l != NULL; l = l->l_next)
- {
- ElfW(Addr) base, limit;
- const ElfW(Phdr) *p = l->l_phdr;
- ElfW(Half) this, nent = l->l_phnum;
-
- for (this = 0; this < nent; ++this)
- {
- if (p[this].p_type == PT_LOAD)
- {
- base = p[this].p_vaddr + l->l_addr;
- limit = base + p[this].p_memsz;
- if (stub_pc >= base && stub_pc < limit)
- return l;
- }
- }
- }
-
- _dl_signal_error (0, NULL, NULL, "cannot find runtime link map");
- return NULL;
-}
-
-#if _MIPS_SIM == _ABIO32
-#define ELF_DL_FRAME_SIZE 40
-
-#define ELF_DL_SAVE_ARG_REGS "\
- sw $15, 36($29)\n \
- sw $4, 16($29)\n \
- sw $5, 20($29)\n \
- sw $6, 24($29)\n \
- sw $7, 28($29)\n \
-"
-
-#define ELF_DL_RESTORE_ARG_REGS "\
- lw $31, 36($29)\n \
- lw $4, 16($29)\n \
- lw $5, 20($29)\n \
- lw $6, 24($29)\n \
- lw $7, 28($29)\n \
-"
-
-#define IFABIO32(X) X
-
-#else /* _MIPS_SIM == _ABIN32 || _MIPS_SIM == _ABI64 */
-
-#define ELF_DL_FRAME_SIZE 80
-
-#define ELF_DL_SAVE_ARG_REGS "\
- sd $15, 72($29)\n \
- sd $4, 8($29)\n \
- sd $5, 16($29)\n \
- sd $6, 24($29)\n \
- sd $7, 32($29)\n \
- sd $8, 40($29)\n \
- sd $9, 48($29)\n \
- sd $10, 56($29)\n \
- sd $11, 64($29)\n \
-"
-
-#define ELF_DL_RESTORE_ARG_REGS "\
- ld $31, 72($29)\n \
- ld $4, 8($29)\n \
- ld $5, 16($29)\n \
- ld $6, 24($29)\n \
- ld $7, 32($29)\n \
- ld $8, 40($29)\n \
- ld $9, 48($29)\n \
- ld $10, 56($29)\n \
- ld $11, 64($29)\n \
-"
-
-#define IFABIO32(X)
-
-#endif
-
-/* Define mips specific runtime resolver. The function __dl_runtime_resolve
- is called from assembler function _dl_runtime_resolve which converts
- special argument registers t7 ($15) and t8 ($24):
- t7 address to return to the caller of the function
- t8 index for this function symbol in .dynsym
- to usual c arguments.
-
- Other architectures call fixup from dl-runtime.c in
- _dl_runtime_resolve. MIPS instead calls __dl_runtime_resolve. We
- have to use our own version because of the way the got section is
- treated on MIPS (we've also got ELF_MACHINE_PLT defined). */
-
-#define ELF_MACHINE_RUNTIME_TRAMPOLINE \
-/* The flag _dl_mips_gnu_objects is set if all dynamic objects are \
- generated by the gnu linker. */ \
-int _dl_mips_gnu_objects = 1; \
- \
-/* This is called from assembly stubs below which the compiler can't see. */ \
-static ElfW(Addr) \
-__dl_runtime_resolve (ElfW(Word), ElfW(Word), ElfW(Addr), ElfW(Addr)) \
- __attribute_used__; \
- \
-static ElfW(Addr) \
-__dl_runtime_resolve (ElfW(Word) sym_index, \
- ElfW(Word) return_address, \
- ElfW(Addr) old_gpreg, \
- ElfW(Addr) stub_pc) \
-{ \
- struct link_map *l = elf_machine_runtime_link_map (old_gpreg, stub_pc); \
- const ElfW(Sym) *const symtab \
- = (const ElfW(Sym) *) D_PTR (l, l_info[DT_SYMTAB]); \
- const char *strtab = (const void *) D_PTR (l, l_info[DT_STRTAB]); \
- ElfW(Addr) *got \
- = (ElfW(Addr) *) D_PTR (l, l_info[DT_PLTGOT]); \
- const ElfW(Word) local_gotno \
- = (const ElfW(Word)) l->l_info[DT_MIPS (LOCAL_GOTNO)]->d_un.d_val; \
- const ElfW(Word) gotsym \
- = (const ElfW(Word)) l->l_info[DT_MIPS (GOTSYM)]->d_un.d_val; \
- const ElfW(Sym) *sym = &symtab[sym_index]; \
- ElfW(Addr) value; \
- \
- /* FIXME: The symbol versioning stuff is not tested yet. */ \
- if (__builtin_expect (ELFW(ST_VISIBILITY) (sym->st_other), 0) == 0) \
- { \
- switch (l->l_info[VERSYMIDX (DT_VERSYM)] != NULL) \
- { \
- default: \
- { \
- const ElfW(Half) *vernum = \
- (const void *) D_PTR (l, l_info[VERSYMIDX (DT_VERSYM)]); \
- ElfW(Half) ndx = vernum[sym_index] & 0x7fff; \
- const struct r_found_version *version = &l->l_versions[ndx]; \
- \
- if (version->hash != 0) \
- { \
- value = _dl_lookup_symbol_x (strtab + sym->st_name, l, \
- &sym, l->l_scope, version, \
- ELF_RTYPE_CLASS_PLT, 0, 0); \
- break; \
- } \
- /* Fall through. */ \
- } \
- case 0: \
- value = _dl_lookup_symbol_x (strtab + sym->st_name, l, &sym, \
- l->l_scope, 0, ELF_RTYPE_CLASS_PLT, \
- DL_LOOKUP_ADD_DEPENDENCY, 0); \
- } \
- \
- /* Currently value contains the base load address of the object \
- that defines sym. Now add in the symbol offset. */ \
- value = (sym ? value + sym->st_value : 0); \
- } \
- else \
- /* We already found the symbol. The module (and therefore its load \
- address) is also known. */ \
- value = l->l_addr + sym->st_value; \
- \
- /* Apply the relocation with that value. */ \
- *(got + local_gotno + sym_index - gotsym) = value; \
- \
- return value; \
-} \
- \
-asm ("\n \
- .text\n \
- .align 2\n \
- .globl _dl_runtime_resolve\n \
- .type _dl_runtime_resolve,@function\n \
- .ent _dl_runtime_resolve\n \
-_dl_runtime_resolve:\n \
- .frame $29, " STRINGXP(ELF_DL_FRAME_SIZE) ", $31\n \
- .set noreorder\n \
- # Save GP.\n \
- move $3, $28\n \
- # Save arguments and sp value in stack.\n \
- " STRINGXP(PTR_SUBIU) " $29, " STRINGXP(ELF_DL_FRAME_SIZE) "\n \
- # Modify t9 ($25) so as to point .cpload instruction.\n \
- " IFABIO32(STRINGXP(PTR_ADDIU) " $25, 12\n") " \
- # Compute GP.\n \
- " STRINGXP(SETUP_GP) "\n \
- " STRINGXV(SETUP_GP64 (0, _dl_runtime_resolve)) "\n \
- .set reorder\n \
- # Save slot call pc.\n \
- move $2, $31\n \
- " IFABIO32(STRINGXP(CPRESTORE(32))) "\n \
- " ELF_DL_SAVE_ARG_REGS " \
- move $4, $24\n \
- move $5, $15\n \
- move $6, $3\n \
- move $7, $2\n \
- jal __dl_runtime_resolve\n \
- " ELF_DL_RESTORE_ARG_REGS " \
- " STRINGXP(RESTORE_GP64) "\n \
- " STRINGXP(PTR_ADDIU) " $29, " STRINGXP(ELF_DL_FRAME_SIZE) "\n \
- move $25, $2\n \
- jr $25\n \
- .end _dl_runtime_resolve\n \
- .previous\n \
-");
-
-/* Mask identifying addresses reserved for the user program,
- where the dynamic linker should not map anything. */
-#define ELF_MACHINE_USER_ADDRESS_MASK 0x80000000UL
-
-
-/* Initial entry point code for the dynamic linker.
- The C function `_dl_start' is the real entry point;
- its return value is the user program's entry point.
- Note how we have to be careful about two things:
-
- 1) That we allocate a minimal stack of 24 bytes for
- every function call, the MIPS ABI states that even
- if all arguments are passed in registers the procedure
- called can use the 16 byte area pointed to by $sp
- when it is called to store away the arguments passed
- to it.
-
- 2) That under Linux the entry is named __start
- and not just plain _start. */
-
-#define RTLD_START asm (\
- ".text\n"\
- _RTLD_PROLOGUE(ENTRY_POINT) "\
- " STRINGXV(SETUP_GPX($25)) "\n\
- " STRINGXV(SETUP_GPX64($18,$25)) "\n\
- # i386 ABI book says that the first entry of GOT holds\n\
- # the address of the dynamic structure. Though MIPS ABI\n\
- # doesn't say nothing about this, I emulate this here.\n\
- " STRINGXP(PTR_LA) " $4, _DYNAMIC\n\
- # Subtract OFFSET_GP_GOT\n\
- " STRINGXP(PTR_S) " $4, -0x7ff0($28)\n\
- move $4, $29\n\
- " STRINGXP(PTR_SUBIU) " $29, 16\n\
- \n\
- " STRINGXP(PTR_LA) " $8, .Lcoff\n\
- bltzal $8, .Lcoff\n\
-.Lcoff: " STRINGXP(PTR_SUBU) " $8, $31, $8\n\
- \n\
- " STRINGXP(PTR_LA) " $25, _dl_start\n\
- " STRINGXP(PTR_ADDU) " $25, $8\n\
- jalr $25\n\
- \n\
- " STRINGXP(PTR_ADDIU) " $29, 16\n\
- # Get the value of label '_dl_start_user' in t9 ($25).\n\
- " STRINGXP(PTR_LA) " $25, _dl_start_user\n\
- .globl _dl_start_user\n\
- .type _dl_start_user,@function\n\
- .aent _dl_start_user\n\
-_dl_start_user:\n\
- " STRINGXP(SETUP_GP) "\n\
- " STRINGXV(SETUP_GP64($18,_dl_start_user)) "\n\
- move $16, $28\n\
- # Save the user entry point address in a saved register.\n\
- move $17, $2\n\
- # See if we were run as a command with the executable file\n\
- # name as an extra leading argument.\n\
- lw $2, _dl_skip_args\n\
- beq $2, $0, 1f\n\
- # Load the original argument count.\n\
- " STRINGXP(PTR_L) " $4, 0($29)\n\
- # Subtract _dl_skip_args from it.\n\
- subu $4, $2\n\
- # Adjust the stack pointer to skip _dl_skip_args words.\n\
- sll $2, " STRINGXP (PTRLOG) "\n\
- " STRINGXP(PTR_ADDU) " $29, $2\n\
- # Save back the modified argument count.\n\
- " STRINGXP(PTR_S) " $4, 0($29)\n\
-1: # Call _dl_init (struct link_map *main_map, int argc, char **argv, char **env) \n\
- " STRINGXP(PTR_L) " $4, _rtld_local\n\
- " STRINGXP(PTR_L) /* or lw??? fixme */ " $5, 0($29)\n\
- " STRINGXP(PTR_LA) " $6, " STRINGXP (PTRSIZE) "($29)\n\
- sll $7, $5, " STRINGXP (PTRLOG) "\n\
- " STRINGXP(PTR_ADDU) " $7, $7, $6\n\
- " STRINGXP(PTR_ADDU) " $7, $7, " STRINGXP (PTRSIZE) " \n\
- " STRINGXP(PTR_SUBIU) " $29, 32\n\
- " STRINGXP(SAVE_GP(16)) "\n\
- # Call the function to run the initializers.\n\
- jal _dl_init_internal\n\
- " STRINGXP(PTR_ADDIU) " $29, 32\n\
- # Pass our finalizer function to the user in $2 as per ELF ABI.\n\
- " STRINGXP(PTR_LA) " $2, _dl_fini\n\
- # Jump to the user entry point.\n\
- move $25, $17\n\
- jr $25\n\t"\
- _RTLD_EPILOGUE(ENTRY_POINT)\
- ".previous"\
-);
-
-/* The MIPS never uses Elfxx_Rela relocations. */
-#define ELF_MACHINE_NO_RELA 1
-
-#endif /* !dl_machine_h */
-
-#ifdef RESOLVE
-
-/* Perform the relocation specified by RELOC and SYM (which is fully resolved).
- MAP is the object containing the reloc. */
-
-static inline void
-#ifdef RTLD_BOOTSTRAP
- __attribute__ ((always_inline))
-#endif
-elf_machine_rel (struct link_map *map, const ElfW(Rel) *reloc,
- const ElfW(Sym) *sym, const struct r_found_version *version,
- void *const reloc_addr)
-{
- const unsigned long int r_type = ELFW(R_TYPE) (reloc->r_info);
-
-#if !defined RTLD_BOOTSTRAP && !defined SHARED
- /* This is defined in rtld.c, but nowhere in the static libc.a;
- make the reference weak so static programs can still link. This
- declaration cannot be done when compiling rtld.c (i.e. #ifdef
- RTLD_BOOTSTRAP) because rtld.c contains the common defn for
- _dl_rtld_map, which is incompatible with a weak decl in the same
- file. */
- weak_extern (GL(dl_rtld_map));
-#endif
-
- switch (r_type)
- {
-#if _MIPS_SIM == _ABI64
- case (R_MIPS_64 << 8) | R_MIPS_REL32:
-#else
- case R_MIPS_REL32:
-#endif
- {
- int symidx = ELFW(R_SYM) (reloc->r_info);
- ElfW(Addr) reloc_value;
-
- /* Support relocations on mis-aligned offsets. Should we ever
- implement RELA, this should be replaced with an assignment
- from reloc->r_addend. */
- __builtin_memcpy (&reloc_value, reloc_addr, sizeof (reloc_value));
-
- if (symidx)
- {
- const ElfW(Word) gotsym
- = (const ElfW(Word)) map->l_info[DT_MIPS (GOTSYM)]->d_un.d_val;
-
- if ((ElfW(Word))symidx < gotsym)
- {
- /* This wouldn't work for a symbol imported from other
- libraries for which there's no GOT entry, but MIPS
- requires every symbol referenced in a dynamic
- relocation to have a GOT entry in the primary GOT,
- so we only get here for locally-defined symbols.
- For section symbols, we should *NOT* be adding
- sym->st_value (per the definition of the meaning of
- S in reloc expressions in the ELF64 MIPS ABI),
- since it should have already been added to
- reloc_value by the linker, but older versions of
- GNU ld didn't add it, and newer versions don't emit
- useless relocations to section symbols any more, so
- it is safe to keep on adding sym->st_value, even
- though it's not ABI compliant. Some day we should
- bite the bullet and stop doing this. */
-#ifndef RTLD_BOOTSTRAP
- if (map != &GL(dl_rtld_map))
-#endif
- reloc_value += sym->st_value + map->l_addr;
- }
- else
- {
-#ifndef RTLD_BOOTSTRAP
- const ElfW(Addr) *got
- = (const ElfW(Addr) *) D_PTR (map, l_info[DT_PLTGOT]);
- const ElfW(Word) local_gotno
- = (const ElfW(Word))
- map->l_info[DT_MIPS (LOCAL_GOTNO)]->d_un.d_val;
-
- reloc_value += got[symidx + local_gotno - gotsym];
-#endif
- }
- }
- else
-#ifndef RTLD_BOOTSTRAP
- if (map != &GL(dl_rtld_map))
-#endif
- reloc_value += map->l_addr;
-
- __builtin_memcpy (reloc_addr, &reloc_value, sizeof (reloc_value));
- }
- break;
- case R_MIPS_NONE: /* Alright, Wilbur. */
- break;
-#if _MIPS_SIM == _ABI64
- case R_MIPS_64:
- /* For full compliance with the ELF64 ABI, one must precede the
- _REL32/_64 pair of relocations with a _64 relocation, such
- that the in-place addend is read as a 64-bit value. IRIX
- didn't pick up on this requirement, so we treat the
- _REL32/_64 relocation as a 64-bit relocation even if it's by
- itself. For ABI compliance, we ignore such _64 dummy
- relocations. For RELA, this may be simply removed, since
- it's totally unnecessary. */
- if (ELFW(R_SYM) (reloc->r_info) == 0)
- break;
- /* Fall through. */
-#endif
- default:
- _dl_reloc_bad_type (map, r_type, 0);
- break;
- }
-}
-
-static inline void
-elf_machine_rel_relative (ElfW(Addr) l_addr, const ElfW(Rel) *reloc,
- void *const reloc_addr)
-{
- /* XXX Nothing to do. There is no relative relocation, right? */
-}
-
-static inline void
-elf_machine_lazy_rel (struct link_map *map,
- ElfW(Addr) l_addr, const ElfW(Rel) *reloc)
-{
- /* Do nothing. */
-}
-
-#ifndef RTLD_BOOTSTRAP
-/* Relocate GOT. */
-static inline void
-elf_machine_got_rel (struct link_map *map, int lazy)
-{
- ElfW(Addr) *got;
- ElfW(Sym) *sym;
- const ElfW(Half) *vernum;
- int i, n, symidx;
-
-#define RESOLVE_GOTSYM(sym,vernum,sym_index) \
- ({ \
- const ElfW(Sym) *ref = sym; \
- const struct r_found_version *version \
- = vernum ? &map->l_versions[vernum[sym_index] & 0x7fff] : NULL; \
- ElfW(Addr) value; \
- value = RESOLVE (&ref, version, R_MIPS_REL32); \
- (ref)? value + ref->st_value: 0; \
- })
-
- if (map->l_info[VERSYMIDX (DT_VERSYM)] != NULL)
- vernum = (const void *) D_PTR (map, l_info[VERSYMIDX (DT_VERSYM)]);
- else
- vernum = NULL;
-
- got = (ElfW(Addr) *) D_PTR (map, l_info[DT_PLTGOT]);
-
- n = map->l_info[DT_MIPS (LOCAL_GOTNO)]->d_un.d_val;
- /* The dynamic linker's local got entries have already been relocated. */
- if (map != &GL(dl_rtld_map))
- {
- /* got[0] is reserved. got[1] is also reserved for the dynamic object
- generated by gnu ld. Skip these reserved entries from relocation. */
- i = (got[1] & ELF_MIPS_GNU_GOT1_MASK)? 2 : 1;
-
- /* Add the run-time displacement to all local got entries if
- needed. */
- if (__builtin_expect (map->l_addr != 0, 0))
- {
- while (i < n)
- got[i++] += map->l_addr;
- }
- }
-
- /* Handle global got entries. */
- got += n;
- /* Keep track of the symbol index. */
- symidx = map->l_info[DT_MIPS (GOTSYM)]->d_un.d_val;
- sym = (ElfW(Sym) *) D_PTR (map, l_info[DT_SYMTAB]) + symidx;
- i = (map->l_info[DT_MIPS (SYMTABNO)]->d_un.d_val
- - map->l_info[DT_MIPS (GOTSYM)]->d_un.d_val);
-
- /* This loop doesn't handle Quickstart. */
- while (i--)
- {
- if (sym->st_shndx == SHN_UNDEF)
- {
- if (ELFW(ST_TYPE) (sym->st_info) == STT_FUNC
- && sym->st_value && lazy)
- *got = sym->st_value + map->l_addr;
- else
- *got = RESOLVE_GOTSYM (sym, vernum, symidx);
- }
- else if (sym->st_shndx == SHN_COMMON)
- *got = RESOLVE_GOTSYM (sym, vernum, symidx);
- else if (ELFW(ST_TYPE) (sym->st_info) == STT_FUNC
- && *got != sym->st_value
- && lazy)
- *got += map->l_addr;
- else if (ELFW(ST_TYPE) (sym->st_info) == STT_SECTION)
- {
- if (sym->st_other == 0)
- *got += map->l_addr;
- }
- else
- *got = RESOLVE_GOTSYM (sym, vernum, symidx);
-
- ++got;
- ++sym;
- ++symidx;
- }
-
-#undef RESOLVE_GOTSYM
-}
-#endif
-
-/* Set up the loaded object described by L so its stub function
- will jump to the on-demand fixup code __dl_runtime_resolve. */
-
-static inline int
-elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
-{
-# ifndef RTLD_BOOTSTRAP
- ElfW(Addr) *got;
- extern void _dl_runtime_resolve (ElfW(Word));
- extern int _dl_mips_gnu_objects;
-
- if (lazy)
- {
- /* The GOT entries for functions have not yet been filled in.
- Their initial contents will arrange when called to put an
- offset into the .dynsym section in t8, the return address
- in t7 and then jump to _GLOBAL_OFFSET_TABLE[0]. */
- got = (ElfW(Addr) *) D_PTR (l, l_info[DT_PLTGOT]);
-
- /* This function will get called to fix up the GOT entry indicated by
- the register t8, and then jump to the resolved address. */
- got[0] = (ElfW(Addr)) &_dl_runtime_resolve;
-
- /* Store l to _GLOBAL_OFFSET_TABLE[1] for gnu object. The MSB
- of got[1] of a gnu object is set to identify gnu objects.
- Where we can store l for non gnu objects? XXX */
- if ((got[1] & ELF_MIPS_GNU_GOT1_MASK) != 0)
- got[1] = ((ElfW(Addr)) l | ELF_MIPS_GNU_GOT1_MASK);
- else
- _dl_mips_gnu_objects = 0;
- }
-
- /* Relocate global offset table. */
- elf_machine_got_rel (l, lazy);
-
-# endif
- return lazy;
-}
-
-#endif /* RESOLVE */
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-21 08:53:13 +0000