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diff --git a/sysdeps/mips/dl-machine.h b/sysdeps/mips/dl-machine.h
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+/* 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 2.25.1) at 2024-11-20 11:18:06 +0000