File glibc-2.15-ifunc-trace.patch of Package glibc

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File glibc-2.15-ifunc-trace.patch of Package glibc (Revision 9955c9dca5071eb82ca7b4a215f8e252)

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commit 3a62d00d408e9ec19479b6c7d39e89021061f9cd
Author: Andreas Schwab <schwab@redhat.com>
Date:   Tue Oct 4 16:10:16 2011 +0200

Don't call ifunc functions in trace mode

2011-10-04  Andreas Schwab  <schwab@redhat.com>

* include/dlfcn.h (__RTLD_NOIFUNC): Define.
	* elf/do-rel.h (elf_dynamic_do_rel): Add parameter skip_ifunc and
	pass it down.
	* elf/dynamic-link.h: Adjust prototypes of elf_machine_rel,
	elf_machine_rela, elf_machine_lazy_rel.
	(_ELF_DYNAMIC_DO_RELOC): Add parameter skip_ifunc and pass it down.
	(ELF_DYNAMIC_DO_REL): Likewise.
	(ELF_DYNAMIC_DO_RELA): Likewise.
	(ELF_DYNAMIC_RELOCATE): Likewise.
	* elf/dl-reloc.c (_dl_relocate_object): Pass __RTLD_NOIFUNC down
	to ELF_DYNAMIC_DO_REL.
	* elf/rtld.c (_dl_start): Adjust use of ELF_DYNAMIC_RELOCATE.
	(dl_main): In trace mode always set __RTLD_NOIFUNC.
	* elf/dl-conflict.c (_dl_resolve_conflicts): Adjust call to
	elf_machine_rela.
	* sysdeps/i386/dl-machine.h (elf_machine_rel): Add parameter
	skip_ifunc, don't call ifunc function if non-zero.
	(elf_machine_rela): Likewise.
	(elf_machine_lazy_rel): Likewise.
	(elf_machine_lazy_rela): Likewise.
	* sysdeps/ia64/dl-machine.h (elf_machine_rela): Likewise.
	(elf_machine_lazy_rel): Likewise.
	* sysdeps/powerpc/powerpc32/dl-machine.h (elf_machine_rela):
	Likewise.
	(elf_machine_lazy_rel): Likewise.
	* sysdeps/powerpc/powerpc64/dl-machine.h (elf_machine_rela):
	Likewise.
	(elf_machine_lazy_rel): Likewise.
	* sysdeps/s390/s390-32/dl-machine.h (elf_machine_rela): Likewise.
	(elf_machine_lazy_rel): Likewise.
	* sysdeps/s390/s390-64/dl-machine.h (elf_machine_rela): Likewise.
	(elf_machine_lazy_rel): Likewise.
	* sysdeps/sh/dl-machine.h (elf_machine_rela): Likewise.
	(elf_machine_lazy_rel): Likewise.
	* sysdeps/sparc/sparc32/dl-machine.h (elf_machine_rela): Likewise.
	(elf_machine_lazy_rel): Likewise.
	* sysdeps/sparc/sparc64/dl-machine.h (elf_machine_rela): Likewise.
	(elf_machine_lazy_rel): Likewise.
	* sysdeps/x86_64/dl-machine.h (elf_machine_rela): Likewise.
	(elf_machine_lazy_rel): Likewise.

Index: glibc-2.14/elf/dl-conflict.c
===================================================================
--- glibc-2.14.orig/elf/dl-conflict.c
+++ glibc-2.14/elf/dl-conflict.c
@@ -1,5 +1,5 @@
 /* Resolve conflicts against already prelinked libraries.
-   Copyright (C) 2001, 2002, 2003, 2004, 2005, 2008 Free Software Foundation, Inc.
+   Copyright (C) 2001, 2002, 2003, 2004, 2005, 2008, 2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Jakub Jelinek <jakub@redhat.com>, 2001.
 
@@ -69,7 +69,8 @@ _dl_resolve_conflicts (struct link_map *
     GL(dl_num_cache_relocations) += conflictend - conflict;
 
     for (; conflict < conflictend; ++conflict)
-      elf_machine_rela (l, conflict, NULL, NULL, (void *) conflict->r_offset);
+      elf_machine_rela (l, conflict, NULL, NULL, (void *) conflict->r_offset,
+			0);
   }
 #endif
 }
Index: glibc-2.14/elf/dl-reloc.c
===================================================================
--- glibc-2.14.orig/elf/dl-reloc.c
+++ glibc-2.14/elf/dl-reloc.c
@@ -162,6 +162,7 @@ _dl_relocate_object (struct link_map *l,
   /* Initialize it to make the compiler happy.  */
   const char *errstring = NULL;
   int lazy = reloc_mode & RTLD_LAZY;
+  int skip_ifunc = reloc_mode & __RTLD_NOIFUNC;
 
 #ifdef SHARED
   /* If we are auditing, install the same handlers we need for profiling.  */
@@ -261,7 +262,7 @@ _dl_relocate_object (struct link_map *l,
 
 #include "dynamic-link.h"
 
-    ELF_DYNAMIC_RELOCATE (l, lazy, consider_profiling);
+    ELF_DYNAMIC_RELOCATE (l, lazy, consider_profiling, skip_ifunc);
 
 #ifndef PROF
     if (__builtin_expect (consider_profiling, 0))
Index: glibc-2.14/elf/do-rel.h
===================================================================
--- glibc-2.14.orig/elf/do-rel.h
+++ glibc-2.14/elf/do-rel.h
@@ -1,5 +1,5 @@
 /* Do relocations for ELF dynamic linking.
-   Copyright (C) 1995-2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 1995-2003, 2004, 2011 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
@@ -52,7 +52,7 @@
 auto inline void __attribute__ ((always_inline))
 elf_dynamic_do_rel (struct link_map *map,
 		    ElfW(Addr) reladdr, ElfW(Addr) relsize,
-		    int lazy)
+		    int lazy, int skip_ifunc)
 {
   const ElfW(Rel) *r = (const void *) reladdr;
   const ElfW(Rel) *end = (const void *) (reladdr + relsize);
@@ -66,7 +66,7 @@ elf_dynamic_do_rel (struct link_map *map
     {
       /* Doing lazy PLT relocations; they need very little info.  */
       for (; r < end; ++r)
-	elf_machine_lazy_rel (map, l_addr, r);
+	elf_machine_lazy_rel (map, l_addr, r, skip_ifunc);
     }
   else
 #endif
@@ -119,14 +119,14 @@ elf_dynamic_do_rel (struct link_map *map
 	      ElfW(Half) ndx = version[ELFW(R_SYM) (r->r_info)] & 0x7fff;
 	      elf_machine_rel (map, r, &symtab[ELFW(R_SYM) (r->r_info)],
 			       &map->l_versions[ndx],
-			       (void *) (l_addr + r->r_offset));
+			       (void *) (l_addr + r->r_offset), skip_ifunc);
 	    }
 	}
 #ifndef RTLD_BOOTSTRAP
       else
 	for (; r < end; ++r)
 	  elf_machine_rel (map, r, &symtab[ELFW(R_SYM) (r->r_info)], NULL,
-			   (void *) (l_addr + r->r_offset));
+			   (void *) (l_addr + r->r_offset), skip_ifunc);
 #endif
     }
 }
Index: glibc-2.14/elf/dynamic-link.h
===================================================================
--- glibc-2.14.orig/elf/dynamic-link.h
+++ glibc-2.14/elf/dynamic-link.h
@@ -60,7 +60,7 @@ int internal_function _dl_try_allocate_s
 auto inline void __attribute__((always_inline))
 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);
+		 void *const reloc_addr, int skip_ifunc);
 auto inline void __attribute__((always_inline))
 elf_machine_rel_relative (ElfW(Addr) l_addr, const ElfW(Rel) *reloc,
 			  void *const reloc_addr);
@@ -69,7 +69,7 @@ elf_machine_rel_relative (ElfW(Addr) l_a
 auto inline void __attribute__((always_inline))
 elf_machine_rela (struct link_map *map, const ElfW(Rela) *reloc,
 		  const ElfW(Sym) *sym, const struct r_found_version *version,
-		  void *const reloc_addr);
+		  void *const reloc_addr, int skip_ifunc);
 auto inline void __attribute__((always_inline))
 elf_machine_rela_relative (ElfW(Addr) l_addr, const ElfW(Rela) *reloc,
 			   void *const reloc_addr);
@@ -77,11 +77,13 @@ elf_machine_rela_relative (ElfW(Addr) l_
 # if ELF_MACHINE_NO_RELA || defined ELF_MACHINE_PLT_REL
 auto inline void __attribute__((always_inline))
 elf_machine_lazy_rel (struct link_map *map,
-		      ElfW(Addr) l_addr, const ElfW(Rel) *reloc);
+		      ElfW(Addr) l_addr, const ElfW(Rel) *reloc,
+		      int skip_ifunc);
 # else
 auto inline void __attribute__((always_inline))
 elf_machine_lazy_rel (struct link_map *map,
-		      ElfW(Addr) l_addr, const ElfW(Rela) *reloc);
+		      ElfW(Addr) l_addr, const ElfW(Rela) *reloc,
+		      int skip_ifunc);
 # endif
 #endif
 
@@ -254,7 +256,7 @@ elf_get_dynamic_info (struct link_map *l
    not happen we do something more optimal.  */
 
 # ifdef ELF_MACHINE_PLTREL_OVERLAP
-#  define _ELF_DYNAMIC_DO_RELOC(RELOC, reloc, map, do_lazy, test_rel) \
+#  define _ELF_DYNAMIC_DO_RELOC(RELOC, reloc, map, do_lazy, skip_ifunc, test_rel) \
   do {									      \
     struct { ElfW(Addr) start, size; int lazy; } ranges[3];		      \
     int ranges_index;							      \
@@ -284,10 +286,11 @@ elf_get_dynamic_info (struct link_map *l
       elf_dynamic_do_##reloc ((map),					      \
 			      ranges[ranges_index].start,		      \
 			      ranges[ranges_index].size,		      \
-			      ranges[ranges_index].lazy);		      \
+			      ranges[ranges_index].lazy,		      \
+			      skip_ifunc);				      \
   } while (0)
 # else
-#  define _ELF_DYNAMIC_DO_RELOC(RELOC, reloc, map, do_lazy, test_rel) \
+#  define _ELF_DYNAMIC_DO_RELOC(RELOC, reloc, map, do_lazy, skip_ifunc, test_rel) \
   do {									      \
     struct { ElfW(Addr) start, size; int lazy; } ranges[2];		      \
     ranges[0].lazy = 0;							      \
@@ -324,7 +327,8 @@ elf_get_dynamic_info (struct link_map *l
       }									      \
 									      \
     if (ELF_DURING_STARTUP)						      \
-      elf_dynamic_do_##reloc ((map), ranges[0].start, ranges[0].size, 0);     \
+      elf_dynamic_do_##reloc ((map), ranges[0].start, ranges[0].size, 0,      \
+			      skip_ifunc);				      \
     else								      \
       {									      \
 	int ranges_index;						      \
@@ -332,7 +336,8 @@ elf_get_dynamic_info (struct link_map *l
 	  elf_dynamic_do_##reloc ((map),				      \
 				  ranges[ranges_index].start,		      \
 				  ranges[ranges_index].size,		      \
-				  ranges[ranges_index].lazy);		      \
+				  ranges[ranges_index].lazy,		      \
+				  skip_ifunc);				      \
       }									      \
   } while (0)
 # endif
@@ -345,29 +350,29 @@ elf_get_dynamic_info (struct link_map *l
 
 # if ! ELF_MACHINE_NO_REL
 #  include "do-rel.h"
-#  define ELF_DYNAMIC_DO_REL(map, lazy) \
-  _ELF_DYNAMIC_DO_RELOC (REL, rel, map, lazy, _ELF_CHECK_REL)
+#  define ELF_DYNAMIC_DO_REL(map, lazy, skip_ifunc) \
+  _ELF_DYNAMIC_DO_RELOC (REL, rel, map, lazy, skip_ifunc, _ELF_CHECK_REL)
 # else
-#  define ELF_DYNAMIC_DO_REL(map, lazy) /* Nothing to do.  */
+#  define ELF_DYNAMIC_DO_REL(map, lazy, skip_ifunc) /* Nothing to do.  */
 # endif
 
 # if ! ELF_MACHINE_NO_RELA
 #  define DO_RELA
 #  include "do-rel.h"
-#  define ELF_DYNAMIC_DO_RELA(map, lazy) \
-  _ELF_DYNAMIC_DO_RELOC (RELA, rela, map, lazy, _ELF_CHECK_REL)
+#  define ELF_DYNAMIC_DO_RELA(map, lazy, skip_ifunc) \
+  _ELF_DYNAMIC_DO_RELOC (RELA, rela, map, lazy, skip_ifunc, _ELF_CHECK_REL)
 # else
-#  define ELF_DYNAMIC_DO_RELA(map, lazy) /* Nothing to do.  */
+#  define ELF_DYNAMIC_DO_RELA(map, lazy, skip_ifunc) /* Nothing to do.  */
 # endif
 
 /* This can't just be an inline function because GCC is too dumb
    to inline functions containing inlines themselves.  */
-# define ELF_DYNAMIC_RELOCATE(map, lazy, consider_profile) \
+# define ELF_DYNAMIC_RELOCATE(map, lazy, consider_profile, skip_ifunc) \
   do {									      \
     int edr_lazy = elf_machine_runtime_setup ((map), (lazy),		      \
 					      (consider_profile));	      \
-    ELF_DYNAMIC_DO_REL ((map), edr_lazy);				      \
-    ELF_DYNAMIC_DO_RELA ((map), edr_lazy);				      \
+    ELF_DYNAMIC_DO_REL ((map), edr_lazy, skip_ifunc);			      \
+    ELF_DYNAMIC_DO_RELA ((map), edr_lazy, skip_ifunc);			      \
   } while (0)
 
 #endif
Index: glibc-2.14/elf/rtld.c
===================================================================
--- glibc-2.14.orig/elf/rtld.c
+++ glibc-2.14/elf/rtld.c
@@ -543,7 +543,7 @@ _dl_start (void *arg)
       /* Relocate ourselves so we can do normal function calls and
 	 data access using the global offset table.  */
 
-      ELF_DYNAMIC_RELOCATE (&bootstrap_map, 0, 0);
+      ELF_DYNAMIC_RELOCATE (&bootstrap_map, 0, 0, 0);
     }
   bootstrap_map.l_relocated = 1;
 
@@ -1992,8 +1992,9 @@ ERROR: ld.so: object '%s' cannot be load
 
 	  /* Relocate the main executable.  */
 	  struct relocate_args args = { .l = l,
-					.reloc_mode = (GLRO(dl_lazy)
-						       ? RTLD_LAZY : 0) };
+					.reloc_mode = ((GLRO(dl_lazy)
+						       ? RTLD_LAZY : 0)
+						       | __RTLD_NOIFUNC) };
 	  _dl_receive_error (print_unresolved, relocate_doit, &args);
 
 	  /* This loop depends on the dependencies of the executable to
@@ -2070,7 +2071,8 @@ ERROR: ld.so: object '%s' cannot be load
 	      struct relocate_args args;
 	      struct link_map *l;
 
-	      args.reloc_mode = GLRO(dl_lazy) ? RTLD_LAZY : 0;
+	      args.reloc_mode = ((GLRO(dl_lazy) ? RTLD_LAZY : 0)
+				 | __RTLD_NOIFUNC);
 
 	      l = main_map;
 	      while (l->l_next != NULL)
@@ -2093,7 +2095,7 @@ ERROR: ld.so: object '%s' cannot be load
 		  /* Mark the link map as not yet relocated again.  */
 		  GL(dl_rtld_map).l_relocated = 0;
 		  _dl_relocate_object (&GL(dl_rtld_map),
-				       main_map->l_scope, 0, 0);
+				       main_map->l_scope, __RTLD_NOIFUNC, 0);
 		}
 	    }
 #define VERNEEDTAG (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGIDX (DT_VERNEED))
Index: glibc-2.14/include/dlfcn.h
===================================================================
--- glibc-2.14.orig/include/dlfcn.h
+++ glibc-2.14/include/dlfcn.h
@@ -10,6 +10,7 @@
 #define __RTLD_CALLMAP	0x10000000
 #define __RTLD_AUDIT	0x08000000
 #define __RTLD_SECURE	0x04000000 /* Apply additional security checks.  */
+#define __RTLD_NOIFUNC	0x02000000 /* Suppress calling ifunc functions.  */
 
 #define __LM_ID_CALLER	-2
 
Index: glibc-2.14/sysdeps/i386/dl-machine.h
===================================================================
--- glibc-2.14.orig/sysdeps/i386/dl-machine.h
+++ glibc-2.14/sysdeps/i386/dl-machine.h
@@ -311,7 +311,7 @@ auto inline void
 __attribute ((always_inline))
 elf_machine_rel (struct link_map *map, const Elf32_Rel *reloc,
 		 const Elf32_Sym *sym, const struct r_found_version *version,
-		 void *const reloc_addr_arg)
+		 void *const reloc_addr_arg, int skip_ifunc)
 {
   Elf32_Addr *const reloc_addr = reloc_addr_arg;
   const unsigned int r_type = ELF32_R_TYPE (reloc->r_info);
@@ -347,7 +347,8 @@ elf_machine_rel (struct link_map *map, c
       if (sym != NULL
 	  && __builtin_expect (ELFW(ST_TYPE) (sym->st_info) == STT_GNU_IFUNC,
 			       0)
-	  && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1))
+	  && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1)
+	  && __builtin_expect (!skip_ifunc, 1))
 	value = ((Elf32_Addr (*) (void)) value) ();
 
       switch (r_type)
@@ -490,7 +491,7 @@ auto inline void
 __attribute__ ((always_inline))
 elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
 		  const Elf32_Sym *sym, const struct r_found_version *version,
-		  void *const reloc_addr_arg)
+		  void *const reloc_addr_arg, int skip_ifunc)
 {
   Elf32_Addr *const reloc_addr = reloc_addr_arg;
   const unsigned int r_type = ELF32_R_TYPE (reloc->r_info);
@@ -507,8 +508,8 @@ elf_machine_rela (struct link_map *map,
 
       if (sym != NULL
 	  && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1)
-	  && __builtin_expect (ELFW(ST_TYPE) (sym->st_info) == STT_GNU_IFUNC,
-			       0))
+	  && __builtin_expect (ELFW(ST_TYPE) (sym->st_info) == STT_GNU_IFUNC, 0)
+	  && __builtin_expect (!skip_ifunc, 1))
 	value = ((Elf32_Addr (*) (void)) value) ();
 
       switch (ELF32_R_TYPE (reloc->r_info))
@@ -655,7 +656,8 @@ elf_machine_rela_relative (Elf32_Addr l_
 auto inline void
 __attribute__ ((always_inline))
 elf_machine_lazy_rel (struct link_map *map,
-		      Elf32_Addr l_addr, const Elf32_Rel *reloc)
+		      Elf32_Addr l_addr, const Elf32_Rel *reloc,
+		      int skip_ifunc)
 {
   Elf32_Addr *const reloc_addr = (void *) (l_addr + reloc->r_offset);
   const unsigned int r_type = ELF32_R_TYPE (reloc->r_info);
@@ -706,19 +708,20 @@ elf_machine_lazy_rel (struct link_map *m
 	      ElfW(Half) ndx = version[ELFW(R_SYM) (r->r_info)] & 0x7fff;
 	      elf_machine_rel (map, r, &symtab[ELFW(R_SYM) (r->r_info)],
 			       &map->l_versions[ndx],
-			       (void *) (l_addr + r->r_offset));
+			       (void *) (l_addr + r->r_offset), skip_ifunc);
 	    }
 # ifndef RTLD_BOOTSTRAP
 	  else
 	    elf_machine_rel (map, r, &symtab[ELFW(R_SYM) (r->r_info)], NULL,
-			     (void *) (l_addr + r->r_offset));
+			     (void *) (l_addr + r->r_offset), skip_ifunc);
 # endif
 	}
     }
   else if (__builtin_expect (r_type == R_386_IRELATIVE, 0))
     {
       Elf32_Addr value = map->l_addr + *reloc_addr;
-      value = ((Elf32_Addr (*) (void)) value) ();
+      if (__builtin_expect (!skip_ifunc, 1))
+	value = ((Elf32_Addr (*) (void)) value) ();
       *reloc_addr = value;
     }
   else
@@ -730,7 +733,8 @@ elf_machine_lazy_rel (struct link_map *m
 auto inline void
 __attribute__ ((always_inline))
 elf_machine_lazy_rela (struct link_map *map,
-		       Elf32_Addr l_addr, const Elf32_Rela *reloc)
+		       Elf32_Addr l_addr, const Elf32_Rela *reloc,
+		       int skip_ifunc)
 {
   Elf32_Addr *const reloc_addr = (void *) (l_addr + reloc->r_offset);
   const unsigned int r_type = ELF32_R_TYPE (reloc->r_info);
@@ -747,7 +751,8 @@ elf_machine_lazy_rela (struct link_map *
   else if (__builtin_expect (r_type == R_386_IRELATIVE, 0))
     {
       Elf32_Addr value = map->l_addr + reloc->r_addend;
-      value = ((Elf32_Addr (*) (void)) value) ();
+      if (__builtin_expect (!skip_ifunc, 1))
+	value = ((Elf32_Addr (*) (void)) value) ();
       *reloc_addr = value;
     }
   else
Index: glibc-2.14/sysdeps/ia64/dl-machine.h
===================================================================
--- glibc-2.14.orig/sysdeps/ia64/dl-machine.h
+++ glibc-2.14/sysdeps/ia64/dl-machine.h
@@ -377,7 +377,8 @@ elf_machine_rela (struct link_map *map,
 		  const Elf64_Rela *reloc,
 		  const Elf64_Sym *sym,
 		  const struct r_found_version *version,
-		  void *const reloc_addr_arg)
+		  void *const reloc_addr_arg,
+		  int skip_ifunc)
 {
   Elf64_Addr *const reloc_addr = reloc_addr_arg;
   const unsigned long int r_type = ELF64_R_TYPE (reloc->r_info);
@@ -493,7 +494,8 @@ elf_machine_rela_relative (Elf64_Addr l_
 auto inline void
 __attribute ((always_inline))
 elf_machine_lazy_rel (struct link_map *map,
-		      Elf64_Addr l_addr, const Elf64_Rela *reloc)
+		      Elf64_Addr l_addr, const Elf64_Rela *reloc,
+		      int skip_ifunc)
 {
   Elf64_Addr *const reloc_addr = (void *) (l_addr + reloc->r_offset);
   const unsigned long int r_type = ELF64_R_TYPE (reloc->r_info);
Index: glibc-2.14/sysdeps/powerpc/powerpc32/dl-machine.h
===================================================================
--- glibc-2.14.orig/sysdeps/powerpc/powerpc32/dl-machine.h
+++ glibc-2.14/sysdeps/powerpc/powerpc32/dl-machine.h
@@ -280,7 +280,7 @@ extern void _dl_reloc_overflow (struct l
 auto inline void __attribute__ ((always_inline))
 elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
 		  const Elf32_Sym *sym, const struct r_found_version *version,
-		  void *const reloc_addr_arg)
+		  void *const reloc_addr_arg, int skip_ifunc)
 {
   Elf32_Addr *const reloc_addr = reloc_addr_arg;
   const Elf32_Sym *const refsym = sym;
@@ -315,7 +315,8 @@ elf_machine_rela (struct link_map *map,
 
   if (sym != NULL
       && __builtin_expect (ELFW(ST_TYPE) (sym->st_info) == STT_GNU_IFUNC, 0)
-      && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1))
+      && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1)
+      && __builtin_expect (!skip_ifunc, 1))
     value = ((Elf32_Addr (*) (void)) value) ();
 
   /* A small amount of code is duplicated here for speed.  In libc,
@@ -391,7 +392,8 @@ elf_machine_rela_relative (Elf32_Addr l_
 
 auto inline void __attribute__ ((always_inline))
 elf_machine_lazy_rel (struct link_map *map,
-		      Elf32_Addr l_addr, const Elf32_Rela *reloc)
+		      Elf32_Addr l_addr, const Elf32_Rela *reloc,
+		      int skip_ifunc)
 {
   /* elf_machine_runtime_setup handles this. */
 }
Index: glibc-2.14/sysdeps/powerpc/powerpc64/dl-machine.h
===================================================================
--- glibc-2.14.orig/sysdeps/powerpc/powerpc64/dl-machine.h
+++ glibc-2.14/sysdeps/powerpc/powerpc64/dl-machine.h
@@ -558,7 +558,8 @@ elf_machine_rela (struct link_map *map,
 		  const Elf64_Rela *reloc,
 		  const Elf64_Sym *sym,
 		  const struct r_found_version *version,
-		  void *const reloc_addr_arg)
+		  void *const reloc_addr_arg,
+		  int skip_ifunc)
 {
   Elf64_Addr *const reloc_addr = reloc_addr_arg;
   const int r_type = ELF64_R_TYPE (reloc->r_info);
@@ -583,7 +584,8 @@ elf_machine_rela (struct link_map *map,
 
   if (sym != NULL
       && __builtin_expect (ELFW(ST_TYPE) (sym->st_info) == STT_GNU_IFUNC, 0)
-      && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1))
+      && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1)
+      && __builtin_expect (!skip_ifunc, 1))
     value = resolve_ifunc (value, map, sym_map);
 
   /* For relocs that don't edit code, return.
@@ -596,12 +598,14 @@ elf_machine_rela (struct link_map *map,
       return;
 
     case R_PPC64_IRELATIVE:
-      value = resolve_ifunc (value, map, sym_map);
+      if (__builtin_expect (!skip_ifunc, 1))
+	value = resolve_ifunc (value, map, sym_map);
       *reloc_addr = value;
       return;
 
     case R_PPC64_JMP_IREL:
-      value = resolve_ifunc (value, map, sym_map);
+      if (__builtin_expect (!skip_ifunc, 1))
+	value = resolve_ifunc (value, map, sym_map);
       /* Fall thru */
     case R_PPC64_JMP_SLOT:
 #ifdef RESOLVE_CONFLICT_FIND_MAP
@@ -852,7 +856,8 @@ elf_machine_rela (struct link_map *map,
 
 auto inline void __attribute__ ((always_inline))
 elf_machine_lazy_rel (struct link_map *map,
-		      Elf64_Addr l_addr, const Elf64_Rela *reloc)
+		      Elf64_Addr l_addr, const Elf64_Rela *reloc,
+		      int skip_ifunc)
 {
   /* elf_machine_runtime_setup handles this.  */
 }
Index: glibc-2.14/sysdeps/s390/s390-32/dl-machine.h
===================================================================
--- glibc-2.14.orig/sysdeps/s390/s390-32/dl-machine.h
+++ glibc-2.14/sysdeps/s390/s390-32/dl-machine.h
@@ -275,7 +275,7 @@ auto inline void
 __attribute__ ((always_inline))
 elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
 		  const Elf32_Sym *sym, const struct r_found_version *version,
-		  void *const reloc_addr_arg)
+		  void *const reloc_addr_arg, int skip_ifunc)
 {
   Elf32_Addr *const reloc_addr = reloc_addr_arg;
   const unsigned int r_type = ELF32_R_TYPE (reloc->r_info);
@@ -434,7 +434,8 @@ elf_machine_rela_relative (Elf32_Addr l_
 auto inline void
 __attribute__ ((always_inline))
 elf_machine_lazy_rel (struct link_map *map,
-		      Elf32_Addr l_addr, const Elf32_Rela *reloc)
+		      Elf32_Addr l_addr, const Elf32_Rela *reloc,
+		      int skip_ifunc)
 {
   Elf32_Addr *const reloc_addr = (void *) (l_addr + reloc->r_offset);
   const unsigned int r_type = ELF32_R_TYPE (reloc->r_info);
Index: glibc-2.14/sysdeps/s390/s390-64/dl-machine.h
===================================================================
--- glibc-2.14.orig/sysdeps/s390/s390-64/dl-machine.h
+++ glibc-2.14/sysdeps/s390/s390-64/dl-machine.h
@@ -247,7 +247,7 @@ auto inline void
 __attribute__ ((always_inline))
 elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc,
 		  const Elf64_Sym *sym, const struct r_found_version *version,
-		  void *const reloc_addr_arg)
+		  void *const reloc_addr_arg, int skip_ifunc)
 {
   Elf64_Addr *const reloc_addr = reloc_addr_arg;
   const unsigned int r_type = ELF64_R_TYPE (reloc->r_info);
@@ -413,7 +413,8 @@ elf_machine_rela_relative (Elf64_Addr l_
 auto inline void
 __attribute__ ((always_inline))
 elf_machine_lazy_rel (struct link_map *map,
-		      Elf64_Addr l_addr, const Elf64_Rela *reloc)
+		      Elf64_Addr l_addr, const Elf64_Rela *reloc,
+		      int skip_ifunc)
 {
   Elf64_Addr *const reloc_addr = (void *) (l_addr + reloc->r_offset);
   const unsigned int r_type = ELF64_R_TYPE (reloc->r_info);
Index: glibc-2.14/sysdeps/sh/dl-machine.h
===================================================================
--- glibc-2.14.orig/sysdeps/sh/dl-machine.h
+++ glibc-2.14/sysdeps/sh/dl-machine.h
@@ -268,7 +268,7 @@ auto inline void
 __attribute ((always_inline))
 elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
 		  const Elf32_Sym *sym, const struct r_found_version *version,
-		  void *const reloc_addr_arg)
+		  void *const reloc_addr_arg, int skip_ifunc)
 {
   Elf32_Addr *const reloc_addr = reloc_addr_arg;
   const unsigned int r_type = ELF32_R_TYPE (reloc->r_info);
@@ -454,7 +454,8 @@ elf_machine_rela_relative (Elf32_Addr l_
 auto inline void
 __attribute__ ((always_inline))
 elf_machine_lazy_rel (struct link_map *map,
-		      Elf32_Addr l_addr, const Elf32_Rela *reloc)
+		      Elf32_Addr l_addr, const Elf32_Rela *reloc,
+		      int skip_ifunc)
 {
   Elf32_Addr *const reloc_addr = (void *) (l_addr + reloc->r_offset);
   /* Check for unexpected PLT reloc type.  */
Index: glibc-2.14/sysdeps/sparc/sparc32/dl-machine.h
===================================================================
--- glibc-2.14.orig/sysdeps/sparc/sparc32/dl-machine.h
+++ glibc-2.14/sysdeps/sparc/sparc32/dl-machine.h
@@ -347,7 +347,7 @@ auto inline void
 __attribute__ ((always_inline))
 elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
 		  const Elf32_Sym *sym, const struct r_found_version *version,
-		  void *const reloc_addr_arg)
+		  void *const reloc_addr_arg, int skip_ifunc)
 {
   Elf32_Addr *const reloc_addr = reloc_addr_arg;
   const Elf32_Sym *const refsym = sym;
@@ -397,7 +397,8 @@ elf_machine_rela (struct link_map *map,
 
   if (sym != NULL
       && __builtin_expect (ELFW(ST_TYPE) (sym->st_info) == STT_GNU_IFUNC, 0)
-      && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1))
+      && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1)
+      && __builtin_expect (!skip_ifunc, 1))
     {
       value = ((Elf32_Addr (*) (int)) value) (GLRO(dl_hwcap));
     }
@@ -552,7 +553,8 @@ elf_machine_rela_relative (Elf32_Addr l_
 auto inline void
 __attribute__ ((always_inline))
 elf_machine_lazy_rel (struct link_map *map,
-		      Elf32_Addr l_addr, const Elf32_Rela *reloc)
+		      Elf32_Addr l_addr, const Elf32_Rela *reloc,
+		      int skip_ifunc)
 {
   Elf32_Addr *const reloc_addr = (void *) (l_addr + reloc->r_offset);
   const unsigned int r_type = ELF32_R_TYPE (reloc->r_info);
@@ -562,7 +564,8 @@ elf_machine_lazy_rel (struct link_map *m
   else if (r_type == R_SPARC_JMP_IREL)
     {
       Elf32_Addr value = map->l_addr + reloc->r_addend;
-      value = ((Elf32_Addr (*) (int)) value) (GLRO(dl_hwcap));
+      if (__builtin_expect (!skip_ifunc, 1))
+	value = ((Elf32_Addr (*) (int)) value) (GLRO(dl_hwcap));
       sparc_fixup_plt (reloc, reloc_addr, value, 1, 1);
     }
   else if (r_type == R_SPARC_NONE)
Index: glibc-2.14/sysdeps/sparc/sparc64/dl-machine.h
===================================================================
--- glibc-2.14.orig/sysdeps/sparc/sparc64/dl-machine.h
+++ glibc-2.14/sysdeps/sparc/sparc64/dl-machine.h
@@ -375,7 +375,7 @@ auto inline void
 __attribute__ ((always_inline))
 elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc,
 		  const Elf64_Sym *sym, const struct r_found_version *version,
-		  void *const reloc_addr_arg)
+		  void *const reloc_addr_arg, int skip_ifunc)
 {
   Elf64_Addr *const reloc_addr = reloc_addr_arg;
 #if !defined RTLD_BOOTSTRAP && !defined RESOLVE_CONFLICT_FIND_MAP
@@ -429,7 +429,8 @@ elf_machine_rela (struct link_map *map,
 
   if (sym != NULL
       && __builtin_expect (ELFW(ST_TYPE) (sym->st_info) == STT_GNU_IFUNC, 0)
-      && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1))
+      && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1)
+      && __builtin_expect (!skip_ifunc, 1))
     value = ((Elf64_Addr (*) (int)) value) (GLRO(dl_hwcap));
 
   switch (r_type)
@@ -647,7 +648,8 @@ elf_machine_rela_relative (Elf64_Addr l_
 auto inline void
 __attribute__ ((always_inline))
 elf_machine_lazy_rel (struct link_map *map,
-		      Elf64_Addr l_addr, const Elf64_Rela *reloc)
+		      Elf64_Addr l_addr, const Elf64_Rela *reloc,
+		      int skip_ifunc)
 {
   Elf64_Addr *const reloc_addr = (void *) (l_addr + reloc->r_offset);
   const unsigned int r_type = ELF64_R_TYPE (reloc->r_info);
@@ -658,7 +660,8 @@ elf_machine_lazy_rel (struct link_map *m
 	   || r_type == R_SPARC_IRELATIVE)
     {
       Elf64_Addr value = map->l_addr + reloc->r_addend;
-      value = ((Elf64_Addr (*) (int)) value) (GLRO(dl_hwcap));
+      if (__builtin_expect (!skip_ifunc, 1))
+	value = ((Elf64_Addr (*) (int)) value) (GLRO(dl_hwcap));
       if (r_type == R_SPARC_JMP_IREL)
 	{
 	  /* 'high' is always zero, for large PLT entries the linker
Index: glibc-2.14/sysdeps/x86_64/dl-machine.h
===================================================================
--- glibc-2.14.orig/sysdeps/x86_64/dl-machine.h
+++ glibc-2.14/sysdeps/x86_64/dl-machine.h
@@ -261,7 +261,7 @@ auto inline void
 __attribute__ ((always_inline))
 elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc,
 		  const Elf64_Sym *sym, const struct r_found_version *version,
-		  void *const reloc_addr_arg)
+		  void *const reloc_addr_arg, int skip_ifunc)
 {
   Elf64_Addr *const reloc_addr = reloc_addr_arg;
   const unsigned long int r_type = ELF64_R_TYPE (reloc->r_info);
@@ -299,7 +299,8 @@ elf_machine_rela (struct link_map *map,
       if (sym != NULL
 	  && __builtin_expect (ELFW(ST_TYPE) (sym->st_info) == STT_GNU_IFUNC,
 			       0)
-	  && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1))
+	  && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1)
+	  && __builtin_expect (!skip_ifunc, 1))
 	value = ((Elf64_Addr (*) (void)) value) ();
 
 # if defined RTLD_BOOTSTRAP && !USE___THREAD
@@ -470,7 +471,8 @@ elf_machine_rela_relative (Elf64_Addr l_
 auto inline void
 __attribute ((always_inline))
 elf_machine_lazy_rel (struct link_map *map,
-		      Elf64_Addr l_addr, const Elf64_Rela *reloc)
+		      Elf64_Addr l_addr, const Elf64_Rela *reloc,
+		      int skip_ifunc)
 {
   Elf64_Addr *const reloc_addr = (void *) (l_addr + reloc->r_offset);
   const unsigned long int r_type = ELF64_R_TYPE (reloc->r_info);
@@ -497,7 +499,8 @@ elf_machine_lazy_rel (struct link_map *m
   else if (__builtin_expect (r_type == R_X86_64_IRELATIVE, 0))
     {
       Elf64_Addr value = map->l_addr + reloc->r_addend;
-      value = ((Elf64_Addr (*) (void)) value) ();
+      if (__builtin_expect (!skip_ifunc, 1))
+	value = ((Elf64_Addr (*) (void)) value) ();
       *reloc_addr = value;
     }
   else

Places

File glibc-2.15-ifunc-trace.patch of Package glibc (Revision 9955c9dca5071eb82ca7b4a215f8e252)

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