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Diffstat (limited to 'source/l/glibc/glibc.git-6ee65ed6ddbf04402fad0bec6aa9c73b9d982ae4.diff')
| -rw-r--r-- | source/l/glibc/glibc.git-6ee65ed6ddbf04402fad0bec6aa9c73b9d982ae4.diff | 322 |
1 files changed, 322 insertions, 0 deletions
diff --git a/source/l/glibc/glibc.git-6ee65ed6ddbf04402fad0bec6aa9c73b9d982ae4.diff b/source/l/glibc/glibc.git-6ee65ed6ddbf04402fad0bec6aa9c73b9d982ae4.diff new file mode 100644 index 000000000..e9b3ba400 --- /dev/null +++ b/source/l/glibc/glibc.git-6ee65ed6ddbf04402fad0bec6aa9c73b9d982ae4.diff @@ -0,0 +1,322 @@ +From 6ee65ed6ddbf04402fad0bec6aa9c73b9d982ae4 Mon Sep 17 00:00:00 2001 +From: Ulrich Drepper <drepper@gmail.com> +Date: Fri, 27 Jan 2012 15:05:19 -0500 +Subject: [PATCH] Sort objects before relocations + +--- + ChangeLog | 11 ++++ + Makeconfig | 6 ++ + NEWS | 4 +- + elf/Makefile | 15 +++++- + elf/dl-open.c | 128 ++++++++++++++++++++++++++++++++++++------------ + elf/tst-relsort1.c | 19 +++++++ + elf/tst-relsort1mod1.c | 7 +++ + elf/tst-relsort1mod2.c | 7 +++ + 8 files changed, 160 insertions(+), 37 deletions(-) + create mode 100644 elf/tst-relsort1.c + create mode 100644 elf/tst-relsort1mod1.c + create mode 100644 elf/tst-relsort1mod2.c + +#diff --git a/ChangeLog b/ChangeLog +#index 24c9550..2efe17a 100644 +#--- a/ChangeLog +#+++ b/ChangeLog +#@@ -1,3 +1,14 @@ +#+2012-01-27 Ulrich Drepper <drepper@gmail.com> +#+ +#+ [BZ #13618] +#+ * elf/dl-open.c (dl_open_worker): Sort objects by dependency before +#+ relocation. +#+ * Makeconfig (libm): Define. +#+ * elf/Makefile: Add rules to build and run tst-relsort1. +#+ * elf/tst-relsort1.c: New file. +#+ * elf/tst-relsort1mod1.c: New file. +#+ * elf/tst-relsort1mod2.c: New file. +#+ + 2012-01-26 Joseph Myers <joseph@codesourcery.com> + + * crypt/md5.h: Remove __STDC__ conditionals. +diff --git a/Makeconfig b/Makeconfig +index 2db2821..68547b2 100644 +--- a/Makeconfig ++++ b/Makeconfig +@@ -900,6 +900,12 @@ else + libdl = $(common-objpfx)dlfcn/libdl.a + endif + ++ifeq ($(build-shared),yes) ++libm = $(common-objpfx)math/libm.so$(libm.so-version) ++else ++libm = $(common-objpfx)math/libm.a ++endif ++ + # These are the subdirectories containing the library source. The order + # is more or less arbitrary. The sorting step will take care of the + # dependencies. +#diff --git a/NEWS b/NEWS +#index 42e09c1..3b502b7 100644 +#--- a/NEWS +#+++ b/NEWS +#@@ -1,4 +1,4 @@ +#-GNU C Library NEWS -- history of user-visible changes. 2012-1-26 +#+GNU C Library NEWS -- history of user-visible changes. 2012-1-27 + #Copyright (C) 1992-2009, 2010, 2011, 2012 Free Software Foundation, Inc. + #See the end for copying conditions. +# +#@@ -10,7 +10,7 @@ Version 2.16 + #* The following bugs are resolved with this release: +# + #13525, 13526, 13527, 13528, 13529, 13531, 13532, 13533, 13547, 13530, +#- 13551, 13552, 13553, 13555, 13559, 13583 +#+ 13551, 13552, 13553, 13555, 13559, 13583, 13618 +# + #* ISO C11 support: +# +diff --git a/elf/Makefile b/elf/Makefile +index 052e763..3f1772a 100644 +--- a/elf/Makefile ++++ b/elf/Makefile +@@ -124,7 +124,8 @@ distribute := rtld-Rules \ + tst-initordera1.c tst-initordera2.c tst-initorderb1.c \ + tst-initorderb2.c tst-initordera3.c tst-initordera4.c \ + tst-initorder.c \ +- tst-initorder2.c ++ tst-initorder2.c \ ++ tst-relsort1.c tst-relsort1mod1.c tst-relsort1mod2.c + + CFLAGS-dl-runtime.c = -fexceptions -fasynchronous-unwind-tables + CFLAGS-dl-lookup.c = -fexceptions -fasynchronous-unwind-tables +@@ -227,7 +228,7 @@ tests += loadtest restest1 preloadtest loadfail multiload origtest resolvfail \ + tst-audit1 tst-audit2 \ + tst-stackguard1 tst-addr1 tst-thrlock \ + tst-unique1 tst-unique2 tst-unique3 tst-unique4 \ +- tst-initorder tst-initorder2 ++ tst-initorder tst-initorder2 tst-relsort1 + # reldep9 + test-srcs = tst-pathopt + selinux-enabled := $(shell cat /selinux/enforce 2> /dev/null) +@@ -290,7 +291,9 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \ + tst-initordera1 tst-initorderb1 \ + tst-initordera2 tst-initorderb2 \ + tst-initordera3 tst-initordera4 \ +- tst-initorder2a tst-initorder2b tst-initorder2c tst-initorder2d ++ tst-initorder2a tst-initorder2b tst-initorder2c \ ++ tst-initorder2d \ ++ tst-relsort1mod1 tst-relsort1mod2 + ifeq (yes,$(have-initfini-array)) + modules-names += tst-array2dep tst-array5dep + endif +@@ -1195,3 +1198,9 @@ CFLAGS-tst-auditmod6b.c += $(AVX-CFLAGS) + CFLAGS-tst-auditmod6c.c += $(AVX-CFLAGS) + CFLAGS-tst-auditmod7b.c += $(AVX-CFLAGS) + endif ++ ++$(objpfx)tst-relsort1: $(libdl) ++$(objpfx)tst-relsort1mod1.so: $(libm) $(objpfx)tst-relsort1mod2.so ++$(objpfx)tst-relsort1mod2.so: $(libm) ++$(objpfx)tst-relsort1.out: $(objpfx)tst-relsort1mod1.so \ ++ $(objpfx)tst-relsort1mod2.so +diff --git a/elf/dl-open.c b/elf/dl-open.c +index a0b5c50..a56bdc1 100644 +--- a/elf/dl-open.c ++++ b/elf/dl-open.c +@@ -1,5 +1,5 @@ + /* Load a shared object at runtime, relocate it, and run its initializer. +- Copyright (C) 1996-2007, 2009, 2010, 2011 Free Software Foundation, Inc. ++ Copyright (C) 1996-2007, 2009, 2010, 2011, 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 +@@ -302,45 +302,109 @@ dl_open_worker (void *a) + if (GLRO(dl_lazy)) + reloc_mode |= mode & RTLD_LAZY; + +- /* Relocate the objects loaded. We do this in reverse order so that copy +- relocs of earlier objects overwrite the data written by later objects. */ +- ++ /* Sort the objects by dependency for the relocation process. This ++ allows IFUNC relocations to work and it also means copy ++ relocation of dependencies are if necessary overwritten. */ ++ size_t nmaps = 0; + struct link_map *l = new; +- while (l->l_next) +- l = l->l_next; +- while (1) ++ do ++ { ++ if (! l->l_real->l_relocated) ++ ++nmaps; ++ l = l->l_next; ++ } ++ while (l != NULL); ++ struct link_map *maps[nmaps]; ++ nmaps = 0; ++ l = new; ++ do + { + if (! l->l_real->l_relocated) ++ maps[nmaps++] = l; ++ l = l->l_next; ++ } ++ while (l != NULL); ++ if (nmaps > 1) ++ { ++ char seen[nmaps]; ++ memset (seen, '\0', nmaps); ++ size_t i = 0; ++ while (1) + { +-#ifdef SHARED +- if (__builtin_expect (GLRO(dl_profile) != NULL, 0)) ++ ++seen[i]; ++ struct link_map *thisp = maps[i]; ++ ++ /* Find the last object in the list for which the current one is ++ a dependency and move the current object behind the object ++ with the dependency. */ ++ size_t k = nmaps - 1; ++ while (k > i) + { +- /* If this here is the shared object which we want to profile +- make sure the profile is started. We can find out whether +- this is necessary or not by observing the `_dl_profile_map' +- variable. If was NULL but is not NULL afterwars we must +- start the profiling. */ +- struct link_map *old_profile_map = GL(dl_profile_map); ++ struct link_map **runp = maps[k]->l_initfini; ++ if (runp != NULL) ++ /* Look through the dependencies of the object. */ ++ while (*runp != NULL) ++ if (__builtin_expect (*runp++ == thisp, 0)) ++ { ++ /* Move the current object to the back past the last ++ object with it as the dependency. */ ++ memmove (&maps[i], &maps[i + 1], ++ (k - i) * sizeof (maps[0])); ++ maps[k] = thisp; ++ ++ if (seen[i + 1] > 1) ++ { ++ ++i; ++ goto next_clear; ++ } ++ ++ char this_seen = seen[i]; ++ memmove (&seen[i], &seen[i + 1], ++ (k - i) * sizeof (seen[0])); ++ seen[k] = this_seen; ++ ++ goto next; ++ } ++ ++ --k; ++ } + +- _dl_relocate_object (l, l->l_scope, reloc_mode | RTLD_LAZY, 1); ++ if (++i == nmaps) ++ break; ++ next_clear: ++ memset (&seen[i], 0, (nmaps - i) * sizeof (seen[0])); ++ next:; ++ } ++ } + +- if (old_profile_map == NULL && GL(dl_profile_map) != NULL) +- { +- /* We must prepare the profiling. */ +- _dl_start_profile (); ++ for (size_t i = nmaps; i-- > 0; ) ++ { ++ l = maps[i]; + +- /* Prevent unloading the object. */ +- GL(dl_profile_map)->l_flags_1 |= DF_1_NODELETE; +- } ++#ifdef SHARED ++ if (__builtin_expect (GLRO(dl_profile) != NULL, 0)) ++ { ++ /* If this here is the shared object which we want to profile ++ make sure the profile is started. We can find out whether ++ this is necessary or not by observing the `_dl_profile_map' ++ variable. If it was NULL but is not NULL afterwars we must ++ start the profiling. */ ++ struct link_map *old_profile_map = GL(dl_profile_map); ++ ++ _dl_relocate_object (l, l->l_scope, reloc_mode | RTLD_LAZY, 1); ++ ++ if (old_profile_map == NULL && GL(dl_profile_map) != NULL) ++ { ++ /* We must prepare the profiling. */ ++ _dl_start_profile (); ++ ++ /* Prevent unloading the object. */ ++ GL(dl_profile_map)->l_flags_1 |= DF_1_NODELETE; + } +- else +-#endif +- _dl_relocate_object (l, l->l_scope, reloc_mode, 0); + } +- +- if (l == new) +- break; +- l = l->l_prev; ++ else ++#endif ++ _dl_relocate_object (l, l->l_scope, reloc_mode, 0); + } + + /* If the file is not loaded now as a dependency, add the search +diff --git a/elf/tst-relsort1.c b/elf/tst-relsort1.c +new file mode 100644 +index 0000000..972100c +--- /dev/null ++++ b/elf/tst-relsort1.c +@@ -0,0 +1,19 @@ ++#include <dlfcn.h> ++#include <stdio.h> ++ ++ ++static int ++do_test () ++{ ++ const char lib[] = "$ORIGIN/tst-relsort1mod1.so"; ++ void *h = dlopen (lib, RTLD_NOW); ++ if (h == NULL) ++ { ++ puts (dlerror ()); ++ return 1; ++ } ++ return 0; ++} ++ ++#define TEST_FUNCTION do_test () ++#include "../test-skeleton.c" +diff --git a/elf/tst-relsort1mod1.c b/elf/tst-relsort1mod1.c +new file mode 100644 +index 0000000..9e4a943 +--- /dev/null ++++ b/elf/tst-relsort1mod1.c +@@ -0,0 +1,7 @@ ++extern int foo (double); ++ ++int ++bar (void) ++{ ++ return foo (1.2); ++} +diff --git a/elf/tst-relsort1mod2.c b/elf/tst-relsort1mod2.c +new file mode 100644 +index 0000000..a2c3e55 +--- /dev/null ++++ b/elf/tst-relsort1mod2.c +@@ -0,0 +1,7 @@ ++#include <math.h> ++ ++int ++foo (double d) ++{ ++ return floor (d) != 0.0; ++} +-- +1.7.3.4 + |