Update copyright dates with scripts/update-copyrights.

[thirdparty/glibc.git] / sysdeps / powerpc / powerpc64 / dl-machine.h

diff --git a/sysdeps/powerpc/powerpc64/dl-machine.h b/sysdeps/powerpc/powerpc64/dl-machine.h
index f222bb07d763bf58dcc15f33322587badd982158..944871223fc0ff3fe42412708652750c0dbbe23b 100644 (file)
--- a/sysdeps/powerpc/powerpc64/dl-machine.h
+++ b/sysdeps/powerpc/powerpc64/dl-machine.h
@@ -1,6 +1,6 @@
 /* Machine-dependent ELF dynamic relocation inline functions.
    PowerPC64 version.
-   Copyright 1995-2013 Free Software Foundation, Inc.
+   Copyright 1995-2015 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
@@ -126,7 +126,7 @@ elf_machine_dynamic (void)
 #else
 # define DL_STARTING_UP_DEF \
 ".LC__dl_starting_up:\n"  \
-"      .tc _dl_starting_up_internal[TC],_dl_starting_up_internal\n"
+"      .tc __GI__dl_starting_up[TC],__GI__dl_starting_up\n"
 #endif
 
 
@@ -169,7 +169,7 @@ DL_STARTING_UP_DEF                                                  \
 ".LC__dl_argc:\n"                                                      \
 "      .tc _dl_argc[TC],_dl_argc\n"                                    \
 ".LC__dl_argv:\n"                                                      \
-"      .tc _dl_argv_internal[TC],_dl_argv_internal\n"                  \
+"      .tc __GI__dl_argv[TC],__GI__dl_argv\n"                          \
 ".LC__dl_fini:\n"                                                      \
 "      .tc _dl_fini[TC],_dl_fini\n"                                    \
 "      .popsection\n"                                                  \
@@ -294,6 +294,7 @@ BODY_PREFIX "_dl_start_user:\n"                                             \
 
 /* The PowerPC never uses REL relocations.  */
 #define ELF_MACHINE_NO_REL 1
+#define ELF_MACHINE_NO_RELA 0
 
 /* Stuff for the PLT.  */
 #if _CALL_ELF != 2
@@ -424,6 +425,42 @@ elf_machine_runtime_setup (struct link_map *map, int lazy, int profile)
   return lazy;
 }
 
+#if _CALL_ELF == 2
+/* If the PLT entry whose reloc is 'reloc' resolves to a function in
+   the same object, return the target function's local entry point
+   offset if usable.  */
+static inline Elf64_Addr __attribute__ ((always_inline))
+ppc64_local_entry_offset (struct link_map *map, lookup_t sym_map,
+                         const Elf64_Rela *reloc)
+{
+  const Elf64_Sym *symtab;
+  const Elf64_Sym *sym;
+
+  /* If the target function is in a different object, we cannot
+     use the local entry point.  */
+  if (sym_map != map)
+    return 0;
+
+  /* If the linker inserted multiple TOCs, we cannot use the
+     local entry point.  */
+  if (map->l_info[DT_PPC64(OPT)]
+      && (map->l_info[DT_PPC64(OPT)]->d_un.d_val & PPC64_OPT_MULTI_TOC))
+    return 0;
+
+  /* Otherwise, we can use the local entry point.  Retrieve its offset
+     from the symbol's ELF st_other field.  */
+  symtab = (const void *) D_PTR (map, l_info[DT_SYMTAB]);
+  sym = &symtab[ELFW(R_SYM) (reloc->r_info)];
+
+  /* If the target function is an ifunc then the local entry offset is
+     for the resolver, not the final destination.  */
+  if (__builtin_expect (ELFW(ST_TYPE) (sym->st_info) == STT_GNU_IFUNC, 0))
+    return 0;
+
+  return PPC64_LOCAL_ENTRY_OFFSET (sym->st_other);
+}
+#endif
+
 /* Change the PLT entry whose reloc is 'reloc' to call the actual
    routine.  */
 static inline Elf64_Addr __attribute__ ((always_inline))
@@ -470,6 +507,7 @@ elf_machine_fixup_plt (struct link_map *map, lookup_t sym_map,
   PPC_DCBST (&plt->fd_func);
   PPC_ISYNC;
 #else
+  finaladdr += ppc64_local_entry_offset (map, sym_map, reloc);
   *reloc_addr = finaladdr;
 #endif
 
@@ -477,7 +515,9 @@ elf_machine_fixup_plt (struct link_map *map, lookup_t sym_map,
 }
 
 static inline void __attribute__ ((always_inline))
-elf_machine_plt_conflict (Elf64_Addr *reloc_addr, Elf64_Addr finaladdr)
+elf_machine_plt_conflict (struct link_map *map, lookup_t sym_map,
+                         const Elf64_Rela *reloc,
+                         Elf64_Addr *reloc_addr, Elf64_Addr finaladdr)
 {
 #if _CALL_ELF != 2
   Elf64_FuncDesc *plt = (Elf64_FuncDesc *) reloc_addr;
@@ -491,6 +531,7 @@ elf_machine_plt_conflict (Elf64_Addr *reloc_addr, Elf64_Addr finaladdr)
   PPC_DCBST (&plt->fd_toc);
   PPC_SYNC;
 #else
+  finaladdr += ppc64_local_entry_offset (map, sym_map, reloc);
   *reloc_addr = finaladdr;
 #endif
 }
@@ -505,8 +546,13 @@ elf_machine_plt_value (struct link_map *map, const Elf64_Rela *reloc,
 
 
 /* Names of the architecture-specific auditing callback functions.  */
+#if _CALL_ELF != 2
 #define ARCH_LA_PLTENTER ppc64_gnu_pltenter
 #define ARCH_LA_PLTEXIT ppc64_gnu_pltexit
+#else
+#define ARCH_LA_PLTENTER ppc64v2_gnu_pltenter
+#define ARCH_LA_PLTEXIT ppc64v2_gnu_pltexit
+#endif
 
 #endif /* dl_machine_h */
 
@@ -610,7 +656,7 @@ elf_machine_rela (struct link_map *map,
       return;
     }
 
-  if (__builtin_expect (r_type == R_PPC64_NONE, 0))
+  if (__glibc_unlikely (r_type == R_PPC64_NONE))
     return;
 
   /* We need SYM_MAP even in the absence of TLS, for elf_machine_fixup_plt
@@ -635,18 +681,18 @@ elf_machine_rela (struct link_map *map,
       return;
 
     case R_PPC64_IRELATIVE:
-      if (__builtin_expect (!skip_ifunc, 1))
+      if (__glibc_likely (!skip_ifunc))
        value = resolve_ifunc (value, map, sym_map);
       *reloc_addr = value;
       return;
 
     case R_PPC64_JMP_IREL:
-      if (__builtin_expect (!skip_ifunc, 1))
+      if (__glibc_likely (!skip_ifunc))
        value = resolve_ifunc (value, map, sym_map);
       /* Fall thru */
     case R_PPC64_JMP_SLOT:
 #ifdef RESOLVE_CONFLICT_FIND_MAP
-      elf_machine_plt_conflict (reloc_addr, value);
+      elf_machine_plt_conflict (map, sym_map, reloc, reloc_addr, value);
 #else
       elf_machine_fixup_plt (map, sym_map, reloc, reloc_addr, value);
 #endif