Avoid runtime GOT relocations in ld.so on powerpc

diff --git a/ChangeLog b/ChangeLog
index 6c9bc16..b0ffe61 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,19 @@
 2012-05-18  Andreas Schwab  <schwab@linux-m68k.org>
 
+       * sysdeps/powerpc/powerpc32/dl-start.S (_dl_start_user): Use
+       INTUSE on _dl_argv, and _rtld_local instead of _rtld_global.
+       * sysdeps/powerpc/powerpc32/fpu/__longjmp-common.S [IS_IN_rtld]:
+       Refer to _rtld_local_ro instead of _rtld_global_ro.
+       * sysdeps/powerpc/powerpc32/fpu/setjmp-common.S [IS_IN_rtld]:
+       Likewise.
+       * sysdeps/powerpc/powerpc64/__longjmp-common.S [IS_IN_rtld]:
+       Likewise.
+       * sysdeps/powerpc/powerpc64/setjmp-common.S [IS_IN_rtld]:
+       Likewise.
+       * sysdeps/powerpc/powerpc64/dl-trampoline.S [SHARED]: Likewise.
+       * sysdeps/powerpc/powerpc64/dl-machine.h: Use _rtld_local instead
+       of _rtld_global, and rtld_progname instead of _dl_argv[0].
+
        * sysdeps/powerpc/powerpc32/dl-machine.c
        (__elf_machine_runtime_setup) [PROF]: Don't reference
        _dl_prof_resolve.

diff --git a/sysdeps/powerpc/powerpc32/dl-start.S b/sysdeps/powerpc/powerpc32/dl-start.S
index 2546fa5..b2d0194 100644 (file)
--- a/sysdeps/powerpc/powerpc32/dl-start.S
+++ b/sysdeps/powerpc/powerpc32/dl-start.S
@@ -1,6 +1,5 @@
 /* Machine-dependent ELF startup code.  PowerPC version.
-   Copyright (C) 1995-2000, 2002, 2004, 2005, 2006, 2011
-       Free Software Foundation, Inc.
+   Copyright (C) 1995-2012 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
@@ -53,9 +52,9 @@ _dl_start_user:
 /*  the address of _start in r30, */
        mr      r30,r3
 /*  &_dl_argc in 29, &_dl_argv in 27, and _dl_loaded in 28.  */
-       lwz     r28,_rtld_global@got(r31)
+       lwz     r28,_rtld_local@got(r31)
        lwz     r29,_dl_argc@got(r31)
-       lwz     r27,_dl_argv@got(r31)
+       lwz     r27,INTUSE(_dl_argv)@got(r31)
 
 /* Call _dl_init (_dl_loaded, _dl_argc, _dl_argv, _dl_argv+_dl_argc+1). */
        lwz     r3,0(r28)

diff --git a/sysdeps/powerpc/powerpc32/fpu/__longjmp-common.S b/sysdeps/powerpc/powerpc32/fpu/__longjmp-common.S
index 4cfde6b..53af043 100644 (file)
--- a/sysdeps/powerpc/powerpc32/fpu/__longjmp-common.S
+++ b/sysdeps/powerpc/powerpc32/fpu/__longjmp-common.S
@@ -1,6 +1,5 @@
 /* longjmp for PowerPC.
-   Copyright (C) 1995-99, 2000, 2003-2006, 2009, 2011
-       Free Software Foundation, Inc.
+   Copyright (C) 1995-2012 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
@@ -38,7 +37,13 @@ ENTRY (BP_SYM (__longjmp))
        addis   r5,r5,_GLOBAL_OFFSET_TABLE_-got_label@ha
        addi    r5,r5,_GLOBAL_OFFSET_TABLE_-got_label@l
 #  ifdef SHARED
+#   ifdef IS_IN_rtld
+       /* Inside ld.so we use the local alias to avoid runtime GOT
+          relocations.  */
+       lwz     r5,_rtld_local_ro@got(r5)
+#   else
        lwz     r5,_rtld_global_ro@got(r5)
+#   endif
        mtlr    r6
        cfi_same_value (lr)
        lwz     r5,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET+4(r5)

diff --git a/sysdeps/powerpc/powerpc32/fpu/setjmp-common.S b/sysdeps/powerpc/powerpc32/fpu/setjmp-common.S
index b3c9f56..1f08b8b 100644 (file)
--- a/sysdeps/powerpc/powerpc32/fpu/setjmp-common.S
+++ b/sysdeps/powerpc/powerpc32/fpu/setjmp-common.S
@@ -1,5 +1,5 @@
 /* setjmp for PowerPC.
-   Copyright (C) 1995-2000, 2003-2005, 2006, 2011 Free Software Foundation, Inc.
+   Copyright (C) 1995-2012 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
@@ -90,7 +90,13 @@ ENTRY (BP_SYM (__sigsetjmp))
        mtlr    r6
        cfi_same_value (lr)
 #  ifdef SHARED
+#   ifdef IS_IN_rtld
+       /* Inside ld.so we use the local alias to avoid runtime GOT
+          relocations.  */
+       lwz     r5,_rtld_local_ro@got(r5)
+#   else
        lwz     r5,_rtld_global_ro@got(r5)
+#   endif
        lwz     r5,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET+4(r5)
 #  else
        lwz     r5,_dl_hwcap@got(r5)

diff --git a/sysdeps/powerpc/powerpc64/__longjmp-common.S b/sysdeps/powerpc/powerpc64/__longjmp-common.S
index 2ff9078..716b8ab 100644 (file)
--- a/sysdeps/powerpc/powerpc64/__longjmp-common.S
+++ b/sysdeps/powerpc/powerpc64/__longjmp-common.S
@@ -1,5 +1,5 @@
 /* longjmp for PowerPC64.
-   Copyright (C) 1995, 1996,1997,1999-2006,2009 Free Software Foundation, Inc.
+   Copyright (C) 1995-2012 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
@@ -31,7 +31,13 @@
        .section        ".toc","aw"
 .LC__dl_hwcap:
 # ifdef SHARED
+#  ifdef IS_IN_rtld
+       /* Inside ld.so we use the local alias to avoid runtime GOT
+          relocations.  */
+       .tc _rtld_local_ro[TC],_rtld_local_ro
+#  else
        .tc _rtld_global_ro[TC],_rtld_global_ro
+#  endif
 # else
        .tc _dl_hwcap[TC],_dl_hwcap
 # endif

diff --git a/sysdeps/powerpc/powerpc64/dl-machine.h b/sysdeps/powerpc/powerpc64/dl-machine.h
index 7c04757..a964a29 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 1995-2005, 2006, 2008, 2010, 2011 Free Software Foundation, Inc.
+   Copyright 1995-2012 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
@@ -161,8 +161,8 @@ BODY_PREFIX "_start:\n"                                                     \
 "      .popsection\n"                                                  \
 "      .pushsection    \".toc\",\"aw\"\n"                              \
 DL_STARTING_UP_DEF                                                     \
-".LC__rtld_global:\n"                                                  \
-"      .tc _rtld_global[TC],_rtld_global\n"                            \
+".LC__rtld_local:\n"                                                   \
+"      .tc _rtld_local[TC],_rtld_local\n"                              \
 ".LC__dl_argc:\n"                                                      \
 "      .tc _dl_argc[TC],_dl_argc\n"                                    \
 ".LC__dl_argv:\n"                                                      \
@@ -181,7 +181,7 @@ BODY_PREFIX "_dl_start_user:\n"                                             \
 /* the address of _start in r30.  */                                   \
 "      mr      30,3\n"                                                 \
 /* &_dl_argc in 29, &_dl_argv in 27, and _dl_loaded in 28.  */         \
-"      ld      28,.LC__rtld_global@toc(2)\n"                           \
+"      ld      28,.LC__rtld_local@toc(2)\n"                            \
 "      ld      29,.LC__dl_argc@toc(2)\n"                               \
 "      ld      27,.LC__dl_argv@toc(2)\n"                               \
 /* _dl_init (_dl_loaded, _dl_argc, _dl_argv, _dl_argv+_dl_argc+1).  */ \
@@ -734,7 +734,7 @@ elf_machine_rela (struct link_map *map,
          _dl_error_printf ("%s: Symbol `%s' has different size" \
                            " in shared object," \
                            " consider re-linking\n",
-                           _dl_argv[0] ?: "<program name unknown>",
+                           rtld_progname ?: "<program name unknown>",
                            strtab + refsym->st_name);
        }
       memcpy (reloc_addr_arg, (char *) value,

diff --git a/sysdeps/powerpc/powerpc64/dl-trampoline.S b/sysdeps/powerpc/powerpc64/dl-trampoline.S
index 266efe3..7bdabe0 100644 (file)
--- a/sysdeps/powerpc/powerpc64/dl-trampoline.S
+++ b/sysdeps/powerpc/powerpc64/dl-trampoline.S
@@ -1,5 +1,5 @@
 /* PLT trampolines.  PPC64 version.
-   Copyright (C) 2005, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2005-2012 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
@@ -169,7 +169,7 @@ END(_dl_runtime_resolve)
        .section        ".toc","aw"
 .LC__dl_hwcap:
 # ifdef SHARED
-       .tc _rtld_global_ro[TC],_rtld_global_ro
+       .tc _rtld_local_ro[TC],_rtld_local_ro
 # else
        .tc _dl_hwcap[TC],_dl_hwcap
 # endif
@@ -217,7 +217,7 @@ EALIGN(_dl_profile_resolve, 4, 0)
        std     r0,FRAME_SIZE+8(r1)
        ld      r12,.LC__dl_hwcap@toc(r2)
 #ifdef SHARED
-       /* Load _rtld-global._dl_hwcap.  */
+       /* Load _rtld_local_ro._dl_hwcap.  */
        ld      r12,RTLD_GLOBAL_RO_DL_HWCAP_OFFSET(r12)
 #else
        ld      r12,0(r12) /* Load extern _dl_hwcap.  */

diff --git a/sysdeps/powerpc/powerpc64/setjmp-common.S b/sysdeps/powerpc/powerpc64/setjmp-common.S
index 1a1326e..bf8bb76 100644 (file)
--- a/sysdeps/powerpc/powerpc64/setjmp-common.S
+++ b/sysdeps/powerpc/powerpc64/setjmp-common.S
@@ -1,5 +1,5 @@
 /* setjmp for PowerPC64.
-   Copyright (C) 1995-2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+   Copyright (C) 1995-2012 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
@@ -30,7 +30,13 @@
        .section        ".toc","aw"
 .LC__dl_hwcap:
 # ifdef SHARED
+#  ifdef IS_IN_rtld
+       /* Inside ld.so we use the local alias to avoid runtime GOT
+          relocations.  */
+       .tc _rtld_local_ro[TC],_rtld_local_ro
+#  else
        .tc _rtld_global_ro[TC],_rtld_global_ro
+#  endif
 # else
        .tc _dl_hwcap[TC],_dl_hwcap
 # endif