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-rw-r--r--elf/Makefile2
-rw-r--r--elf/dl-addr.c85
-rw-r--r--elf/dl-runtime.c174
-rw-r--r--elf/dladdr.c64
-rw-r--r--elf/dlfcn.h2
-rw-r--r--elf/link.h4
-rw-r--r--elf/rtld.c2
7 files changed, 181 insertions, 152 deletions
diff --git a/elf/Makefile b/elf/Makefile
index fb85b85e3c..5f78c5cb1d 100644
--- a/elf/Makefile
+++ b/elf/Makefile
@@ -22,7 +22,7 @@ subdir		:= elf
 
 headers		= elf.h bits/elfclass.h bits/dlfcn.h link.h dlfcn.h
 routines	= $(dl-routines) dl-open dl-close dl-symbol dl-support \
-		  enbl-secure
+		  dl-addr enbl-secure
 
 # The core dynamic linking functions are in libc for the static and
 # profiled libraries.
diff --git a/elf/dl-addr.c b/elf/dl-addr.c
new file mode 100644
index 0000000000..d50cc4bf10
--- /dev/null
+++ b/elf/dl-addr.c
@@ -0,0 +1,85 @@
+/* Locate the shared object symbol nearest a given address.
+   Copyright (C) 1996, 1997 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <stddef.h>
+#include <link.h>
+#include <dlfcn.h>
+
+
+int
+_dl_addr (const void *address, Dl_info *info)
+{
+  const ElfW(Addr) addr = (ElfW(Addr)) address;
+  struct link_map *l, *match;
+  const ElfW(Sym) *symtab, *matchsym;
+  const char *strtab;
+
+  /* Find the highest-addressed object that ADDRESS is not below.  */
+  match = NULL;
+  for (l = _dl_loaded; l; l = l->l_next)
+    if (addr >= l->l_addr && !match || match->l_addr < l->l_addr)
+      match = l;
+
+  if (match)
+    {
+      /* We know ADDRESS lies within MATCH if in any shared object.
+	 Make sure it isn't past the end of MATCH's segments.  */
+      size_t n = match->l_phnum;
+      do
+	--n;
+      while (match->l_phdr[n].p_type != PT_LOAD);
+      if (addr >= (match->l_addr +
+		   match->l_phdr[n].p_vaddr + match->l_phdr[n].p_memsz))
+	/* Off the end of the highest-addressed shared object.  */
+	return 0;
+    }
+  else
+    return 0;
+
+  /* Now we know what object the address lies in.  */
+  info->dli_fname = match->l_name;
+  info->dli_fbase = (void *) match->l_addr;
+
+  symtab = ((void *) match->l_addr + match->l_info[DT_SYMTAB]->d_un.d_ptr);
+  strtab = ((void *) match->l_addr + match->l_info[DT_STRTAB]->d_un.d_ptr);
+
+  /* We assume that the string table follows the symbol table, because
+     there is no way in ELF to know the size of the dynamic symbol table!!  */
+  for (matchsym = NULL; (void *) symtab < (void *) strtab; ++symtab)
+    if (addr >= match->l_addr + symtab->st_value && !matchsym ||
+	matchsym->st_value < symtab->st_value &&
+	ELFW(ST_BIND) (symtab->st_info) == STB_GLOBAL ||
+	ELFW(ST_BIND) (symtab->st_info) == STB_WEAK)
+      matchsym = symtab;
+
+  if (matchsym)
+    {
+      /* We found a symbol close by.  Fill in its name and exact address.  */
+      info->dli_sname = strtab + matchsym->st_name;
+      info->dli_saddr = (void *) (match->l_addr + matchsym->st_value);
+    }
+  else
+    {
+      /* No symbol matches.  We return only the containing object.  */
+      info->dli_sname = NULL;
+      info->dli_saddr = NULL;
+    }
+
+  return 1;
+}
diff --git a/elf/dl-runtime.c b/elf/dl-runtime.c
index e7132ed832..3f09d72c32 100644
--- a/elf/dl-runtime.c
+++ b/elf/dl-runtime.c
@@ -70,37 +70,16 @@ _dl_object_relocation_scope (struct link_map *l)
 
 #include "dynamic-link.h"
 
-/* Figure out the right type, Rel or Rela.  */
-#define elf_machine_rel 1
-#define elf_machine_rela 2
-#if elf_machine_relplt == elf_machine_rel
-# define PLTREL ElfW(Rel)
-#elif elf_machine_relplt == elf_machine_rela
-# define PLTREL ElfW(Rela)
+#if !defined ELF_MACHINE_NO_RELA || ELF_MACHINE_NO_REL
+# define PLTREL  ElfW(Rela)
 #else
-# error "dl-machine.h bug: elf_machine_relplt not rel or rela"
+# define PLTREL  ElfW(Rel)
 #endif
-#undef elf_machine_rel
-#undef elf_machine_rela
 
 #ifndef VERSYMIDX
 # define VERSYMIDX(sym)	(DT_NUM + DT_PROCNUM + DT_VERSIONTAGIDX (sym))
 #endif
 
-#ifndef ELF_FIXUP_RETURN_VALUE
-#define ELF_FIXUP_RETURN_VALUE(map, result)  (result)
-#endif
-
-/* We need to define the function as a local symbol so that the reference
-   in the trampoline code will be a local PC-relative call.  Tell the
-   compiler not to worry that the function appears not to be called.  */
-
-static ElfW(Addr) fixup (
-#ifdef ELF_MACHINE_RUNTIME_FIXUP_ARGS
-			 ELF_MACHINE_RUNTIME_FIXUP_ARGS,
-#endif
-			 struct link_map *l, ElfW(Word) reloc_offset)
-     __attribute__ ((unused));
 
 /* This function is called through a special trampoline from the PLT the
    first time each PLT entry is called.  We must perform the relocation
@@ -109,7 +88,7 @@ static ElfW(Addr) fixup (
    to that address.  Future calls will bounce directly from the PLT to the
    function.  */
 
-static ElfW(Addr)
+static ElfW(Addr) __attribute__ ((unused))
 fixup (
 #ifdef ELF_MACHINE_RUNTIME_FIXUP_ARGS
        ELF_MACHINE_RUNTIME_FIXUP_ARGS,
@@ -124,57 +103,63 @@ fixup (
   const PLTREL *const reloc
     = (const void *) (l->l_addr + l->l_info[DT_JMPREL]->d_un.d_ptr +
 		      reloc_offset);
-  ElfW(Addr) *const rel_addr = (ElfW(Addr) *)(l->l_addr + reloc->r_offset);
+  const ElfW(Sym) *sym = &symtab[ELFW(R_SYM) (reloc->r_info)];
+  void *const rel_addr = (void *)(l->l_addr + reloc->r_offset);
+  ElfW(Addr) value;
 
   /* Set up the scope to find symbols referenced by this object.  */
   struct link_map **scope = _dl_object_relocation_scope (l);
 
-  {
-    const struct r_found_version *here_version;
-
-    /* This macro is used as a callback from the elf_machine_relplt code.  */
-#define RESOLVE(ref, version, flags) \
-  ((version) != NULL && (version)->hash != 0				      \
-   ? _dl_lookup_versioned_symbol (strtab + (*ref)->st_name, (ref), scope,     \
-				  l->l_name, (version), (flags))	      \
-   : _dl_lookup_symbol (strtab + (*ref)->st_name, (ref), scope,		      \
-			l->l_name, (flags)))
-#include "dynamic-link.h"
+  /* Sanity check that we're really looking at a PLT relocation.  */
+  assert (ELFW(R_TYPE)(reloc->r_info) == ELF_MACHINE_JMP_SLOT);
 
-    /* Perform the specified relocation.  */
-    if (l->l_info[VERSYMIDX (DT_VERSYM)])
+   /* Look up the target symbol.  */
+  switch (l->l_info[VERSYMIDX (DT_VERSYM)] != NULL)
+    {
+    default:
       {
-	const ElfW(Half) *version =
-	  (const ElfW(Half) *) (l->l_addr +
-				l->l_info[VERSYMIDX (DT_VERSYM)]->d_un.d_ptr);
-	ElfW(Half) ndx = version[ELFW(R_SYM) (reloc->r_info)];
-
-	here_version = &l->l_versions[ndx];
+	const ElfW(Half) *vernum = (const ElfW(Half) *)
+	  (l->l_addr + l->l_info[VERSYMIDX (DT_VERSYM)]->d_un.d_ptr);
+	ElfW(Half) ndx = vernum[ELFW(R_SYM) (reloc->r_info)];
+	const struct r_found_version *version = &l->l_versions[ndx];
+
+	if (version->hash != 0)
+	  {
+	    value = _dl_lookup_versioned_symbol(strtab + sym->st_name,
+						&sym, scope, l->l_name,
+						version, ELF_MACHINE_JMP_SLOT);
+	    break;
+	  }
       }
-    else
-      here_version = NULL;
+    case 0:
+      value = _dl_lookup_symbol (strtab + sym->st_name, &sym, scope,
+				 l->l_name, ELF_MACHINE_JMP_SLOT);
+    }
+
+  /* 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);
+
+  /* And now the relocation addend.  */
+#ifndef ELF_MACHINE_NO_RELA
+  if (l->l_info[DT_PLTRELSZ]->d_un.d_val == sizeof (ElfW(Rela)))
+    value += reloc->r_addend;
+#elif ELF_MACHINE_NO_REL
+  value += reloc->r_addend;
+#endif
 
-    elf_machine_relplt (l, reloc, &symtab[ELFW(R_SYM) (reloc->r_info)],
-			here_version, (void *) rel_addr);
-  }
+  /* Finally, fix up the plt itself.  */
+  elf_machine_fixup_plt (l, reloc, rel_addr, value);
 
   *_dl_global_scope_end = NULL;
 
-  /* Return the address that was written by the relocation.  */
-  return ELF_FIXUP_RETURN_VALUE(l, *rel_addr);
+  return value;
 }
 
 
 #ifndef PROF
-static ElfW(Addr)
-profile_fixup (
-#ifdef ELF_MACHINE_RUNTIME_FIXUP_ARGS
-	       ELF_MACHINE_RUNTIME_FIXUP_ARGS,
-#endif
-	       struct link_map *l, ElfW(Word) reloc_offset, ElfW(Addr) retaddr)
-     __attribute__ ((unused));
 
-static ElfW(Addr)
+static ElfW(Addr) __attribute__ ((unused))
 profile_fixup (
 #ifdef ELF_MACHINE_RUNTIME_FIXUP_ARGS
        ELF_MACHINE_RUNTIME_FIXUP_ARGS,
@@ -182,6 +167,7 @@ profile_fixup (
        struct link_map *l, ElfW(Word) reloc_offset, ElfW(Addr) retaddr)
 {
   void (*mcount_fct) (ElfW(Addr), ElfW(Addr)) = _dl_mcount;
+
   const ElfW(Sym) *const symtab
     = (const ElfW(Sym) *) (l->l_addr + l->l_info[DT_SYMTAB]->d_un.d_ptr);
   const char *strtab =
@@ -190,47 +176,57 @@ profile_fixup (
   const PLTREL *const reloc
     = (const void *) (l->l_addr + l->l_info[DT_JMPREL]->d_un.d_ptr +
 		      reloc_offset);
-  ElfW(Addr) result;
+  const ElfW(Sym) *sym = &symtab[ELFW(R_SYM) (reloc->r_info)];
+  ElfW(Addr) value;
 
   /* Set up the scope to find symbols referenced by this object.  */
   struct link_map **scope = _dl_object_relocation_scope (l);
 
-  {
-    const struct r_found_version *here_version;
+  /* Sanity check that we're really looking at a PLT relocation.  */
+  assert (ELFW(R_TYPE)(reloc->r_info) == ELF_MACHINE_JMP_SLOT);
 
-    /* This macro is used as a callback from the elf_machine_relplt code.  */
-#define RESOLVE(ref, version, flags) \
-  ((version) != NULL && (version)->hash != 0				      \
-   ? _dl_lookup_versioned_symbol (strtab + (*ref)->st_name, (ref), scope,     \
-				  l->l_name, (version), (flags))	      \
-   : _dl_lookup_symbol (strtab + (*ref)->st_name, (ref), scope,		      \
-			l->l_name, (flags)))
-#include "dynamic-link.h"
-
-    /* Perform the specified relocation.  */
-    if (l->l_info[VERSYMIDX (DT_VERSYM)])
+  /* Look up the target symbol.  */
+  switch (l->l_info[VERSYMIDX (DT_VERSYM)] != NULL)
+    {
+    default:
       {
-	const ElfW(Half) *version =
-	  (const ElfW(Half) *) (l->l_addr +
-				l->l_info[VERSYMIDX (DT_VERSYM)]->d_un.d_ptr);
-	ElfW(Half) ndx = version[ELFW(R_SYM) (reloc->r_info)];
-
-	here_version = &l->l_versions[ndx];
+	const ElfW(Half) *vernum = (const ElfW(Half) *)
+	  (l->l_addr + l->l_info[VERSYMIDX (DT_VERSYM)]->d_un.d_ptr);
+	ElfW(Half) ndx = vernum[ELFW(R_SYM) (reloc->r_info)];
+	const struct r_found_version *version = &l->l_versions[ndx];
+
+	if (version->hash != 0)
+	  {
+	    value = _dl_lookup_versioned_symbol(strtab + sym->st_name,
+						&sym, scope, l->l_name,
+						version, ELF_MACHINE_JMP_SLOT);
+	    break;
+	  }
       }
-    else
-      here_version = NULL;
+    case 0:
+      value = _dl_lookup_symbol (strtab + sym->st_name, &sym, scope,
+				 l->l_name, ELF_MACHINE_JMP_SLOT);
+    }
+
+  /* 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);
 
-    elf_machine_relplt (l, reloc, &symtab[ELFW(R_SYM) (reloc->r_info)],
-			here_version, (void *) &result);
-  }
+  /* And now the relocation addend.  */
+#ifndef ELF_MACHINE_NO_RELA
+  if (l->l_info[DT_PLTRELSZ]->d_un.d_val == sizeof (ElfW(Rela)))
+    value += reloc->r_addend;
+#elif ELF_MACHINE_NO_REL
+  value += reloc->r_addend;
+#endif
 
   *_dl_global_scope_end = NULL;
-  (*mcount_fct) (retaddr, ELF_FIXUP_RETURN_VALUE (l, result));
+  (*mcount_fct) (retaddr, value);
 
-  /* Return the address that was written by the relocation.  */
-  return ELF_FIXUP_RETURN_VALUE (l, result);
+  return value;
 }
-#endif
+
+#endif /* PROF */
 
 
 /* This macro is defined in dl-machine.h to define the entry point called
diff --git a/elf/dladdr.c b/elf/dladdr.c
index 59e9783760..d82a9e78cb 100644
--- a/elf/dladdr.c
+++ b/elf/dladdr.c
@@ -1,5 +1,5 @@
-/* dladdr -- Locate the shared object symbol nearest a given address.
-   Copyright (C) 1996 Free Software Foundation, Inc.
+/* Locate the shared object symbol nearest a given address.
+   Copyright (C) 1996, 1997 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
@@ -23,63 +23,7 @@
 
 
 int
-dladdr (void *address, Dl_info *info)
+dladdr (const void *address, Dl_info *info)
 {
-  const ElfW(Addr) addr = (ElfW(Addr)) address;
-  struct link_map *l, *match;
-  const ElfW(Sym) *symtab, *matchsym;
-  const char *strtab;
-
-  /* Find the highest-addressed object that ADDRESS is not below.  */
-  match = NULL;
-  for (l = _dl_loaded; l; l = l->l_next)
-    if (addr >= l->l_addr && !match || match->l_addr < l->l_addr)
-      match = l;
-
-  if (match)
-    {
-      /* We know ADDRESS lies within MATCH if in any shared object.
-	 Make sure it isn't past the end of MATCH's segments.  */
-      size_t n = match->l_phnum;
-      do
-	--n;
-      while (match->l_phdr[n].p_type != PT_LOAD);
-      if (addr >= (match->l_addr +
-		   match->l_phdr[n].p_vaddr + match->l_phdr[n].p_memsz))
-	/* Off the end of the highest-addressed shared object.  */
-	return 0;
-    }
-  else
-    return 0;
-
-  /* Now we know what object the address lies in.  */
-  info->dli_fname = match->l_name;
-  info->dli_fbase = (void *) match->l_addr;
-
-  symtab = ((void *) match->l_addr + match->l_info[DT_SYMTAB]->d_un.d_ptr);
-  strtab = ((void *) match->l_addr + match->l_info[DT_STRTAB]->d_un.d_ptr);
-
-  /* We assume that the string table follows the symbol table, because
-     there is no way in ELF to know the size of the dynamic symbol table!!  */
-  for (matchsym = NULL; (void *) symtab < (void *) strtab; ++symtab)
-    if (addr >= match->l_addr + symtab->st_value && !matchsym ||
-	matchsym->st_value < symtab->st_value &&
-	ELFW(ST_BIND) (symtab->st_info) == STB_GLOBAL ||
-	ELFW(ST_BIND) (symtab->st_info) == STB_WEAK)
-      matchsym = symtab;
-
-  if (matchsym)
-    {
-      /* We found a symbol close by.  Fill in its name and exact address.  */
-      info->dli_sname = strtab + matchsym->st_name;
-      info->dli_saddr = (void *) (match->l_addr + matchsym->st_value);
-    }
-  else
-    {
-      /* No symbol matches.  We return only the containing object.  */
-      info->dli_sname = NULL;
-      info->dli_saddr = NULL;
-    }
-
-  return 1;
+  return _dl_addr (address, info);
 }
diff --git a/elf/dlfcn.h b/elf/dlfcn.h
index 9db5fb4635..825b4843c1 100644
--- a/elf/dlfcn.h
+++ b/elf/dlfcn.h
@@ -68,7 +68,7 @@ typedef struct
     __const char *dli_sname;	/* Name of nearest symbol.  */
     void *dli_saddr;		/* Exact value of nearest symbol.  */
   } Dl_info;
-extern int dladdr __P ((void *__address, Dl_info *__info));
+extern int dladdr __P ((const void *__address, Dl_info *__info));
 
 __END_DECLS
 
diff --git a/elf/link.h b/elf/link.h
index a90854a2ea..c4b0a4fd9c 100644
--- a/elf/link.h
+++ b/elf/link.h
@@ -27,6 +27,7 @@
 #include <stddef.h>
 
 #include <elf.h>
+#include <dlfcn.h>
 
 __BEGIN_DECLS
 
@@ -358,6 +359,9 @@ extern ElfW(Addr) _dl_lookup_versioned_symbol_skip (const char *undef,
 						    const struct r_found_version *version,
 						    struct link_map *skip_this);
 
+/* Locate shared object containing the given address.  */
+extern int _dl_addr (const void *address, Dl_info *info);
+
 /* Look up symbol NAME in MAP's scope and return its run-time address.  */
 extern ElfW(Addr) _dl_symbol_value (struct link_map *map, const char *name);
 
diff --git a/elf/rtld.c b/elf/rtld.c
index 3e21f1a95a..74a8f3b05b 100644
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -671,7 +671,7 @@ of this helper program; chances are you did not intend to run this program.\n",
 	    ElfW(Addr) loadbase = _dl_lookup_symbol (_dl_argv[i], &ref,
 						     &_dl_default_scope[2],
 						     "argument",
-						     ELF_MACHINE_RELOC_NOPLT);
+						     ELF_MACHINE_JMP_SLOT);
 	    char buf[20], *bp;
 	    buf[sizeof buf - 1] = '\0';
 	    bp = _itoa (ref->st_value, &buf[sizeof buf - 1], 16, 0);