(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.

1 files changed, 777 insertions, 0 deletions

diff --git a/sysdeps/mips/dl-machine.h b/sysdeps/mips/dl-machine.h
new file mode 100644
index 0000000000..0d87b65691
--- /dev/null
+++ b/sysdeps/mips/dl-machine.h
@@ -0,0 +1,777 @@
+/* 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 */