From 2cbf10ae2ea9e378ff91b8f5c4d8cb77ed05378e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bart=C5=82omiej=20Piotrowski?= Date: Fri, 10 Aug 2018 14:12:40 +0000 Subject: [PATCH] Revert "elf: Correct absolute (SHN_ABS) symbol run-time calculation [BZ #19818]" This reverts commit e7feec374c635b6a29d65c39ae5e1855528fed39. --- elf/Makefile | 14 ++----------- elf/dl-addr.c | 2 -- elf/tst-absolute-sym-lib.c | 25 ------------------------ elf/tst-absolute-sym-lib.lds | 19 ------------------ elf/tst-absolute-sym.c | 38 ------------------------------------ sysdeps/generic/ldsodefs.h | 3 +-- 6 files changed, 3 insertions(+), 98 deletions(-) delete mode 100644 elf/tst-absolute-sym-lib.c delete mode 100644 elf/tst-absolute-sym-lib.lds delete mode 100644 elf/tst-absolute-sym.c diff --git a/elf/Makefile b/elf/Makefile index cd0771307f..5084ba4f6f 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -186,7 +186,7 @@ tests += restest1 preloadtest loadfail multiload origtest resolvfail \ tst-tlsalign tst-tlsalign-extern tst-nodelete-opened \ tst-nodelete2 tst-audit11 tst-audit12 tst-dlsym-error tst-noload \ tst-latepthread tst-tls-manydynamic tst-nodelete-dlclose \ - tst-debug1 tst-main1 tst-absolute-sym tst-absolute-zero tst-big-note + tst-debug1 tst-main1 # reldep9 tests-internal += loadtest unload unload2 circleload1 \ neededtest neededtest2 neededtest3 neededtest4 \ @@ -272,9 +272,7 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \ tst-audit12mod1 tst-audit12mod2 tst-audit12mod3 tst-auditmod12 \ tst-latepthreadmod $(tst-tls-many-dynamic-modules) \ tst-nodelete-dlclose-dso tst-nodelete-dlclose-plugin \ - tst-main1mod tst-libc_dlvsym-dso tst-absolute-sym-lib \ - tst-absolute-zero-lib tst-big-note-lib - + tst-main1mod tst-libc_dlvsym-dso ifeq (yes,$(have-mtls-dialect-gnu2)) tests += tst-gnu2-tls1 modules-names += tst-gnu2-tls1mod @@ -1465,14 +1463,6 @@ tst-main1-no-pie = yes LDLIBS-tst-main1 = $(libsupport) tst-main1mod.so-no-z-defs = yes -LDLIBS-tst-absolute-sym-lib.so = tst-absolute-sym-lib.lds -$(objpfx)tst-absolute-sym-lib.so: $(LDLIBS-tst-absolute-sym-lib.so) -$(objpfx)tst-absolute-sym: $(objpfx)tst-absolute-sym-lib.so - -LDLIBS-tst-absolute-zero-lib.so = tst-absolute-zero-lib.lds -$(objpfx)tst-absolute-zero-lib.so: $(LDLIBS-tst-absolute-zero-lib.so) -$(objpfx)tst-absolute-zero: $(objpfx)tst-absolute-zero-lib.so - # Both the main program and the DSO for tst-libc_dlvsym need to link # against libdl. $(objpfx)tst-libc_dlvsym: $(libdl) diff --git a/elf/dl-addr.c b/elf/dl-addr.c index e6c7d02094..2250617a73 100644 --- a/elf/dl-addr.c +++ b/elf/dl-addr.c @@ -59,7 +59,6 @@ determine_info (const ElfW(Addr) addr, struct link_map *match, Dl_info *info, we can omit that test here. */ if ((symtab[symndx].st_shndx != SHN_UNDEF || symtab[symndx].st_value != 0) - && symtab[symndx].st_shndx != SHN_ABS && ELFW(ST_TYPE) (symtab[symndx].st_info) != STT_TLS && DL_ADDR_SYM_MATCH (match, &symtab[symndx], matchsym, addr) @@ -92,7 +91,6 @@ determine_info (const ElfW(Addr) addr, struct link_map *match, Dl_info *info, && ELFW(ST_TYPE) (symtab->st_info) != STT_TLS && (symtab->st_shndx != SHN_UNDEF || symtab->st_value != 0) - && symtab->st_shndx != SHN_ABS && DL_ADDR_SYM_MATCH (match, symtab, matchsym, addr) && symtab->st_name < strtabsize) matchsym = (ElfW(Sym) *) symtab; diff --git a/elf/tst-absolute-sym-lib.c b/elf/tst-absolute-sym-lib.c deleted file mode 100644 index 912cb0048a..0000000000 --- a/elf/tst-absolute-sym-lib.c +++ /dev/null @@ -1,25 +0,0 @@ -/* BZ #19818 absolute symbol calculation shared module. - Copyright (C) 2018 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 Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - . */ - -extern char absolute; - -void * -get_absolute (void) -{ - return &absolute; -} diff --git a/elf/tst-absolute-sym-lib.lds b/elf/tst-absolute-sym-lib.lds deleted file mode 100644 index d4a4128514..0000000000 --- a/elf/tst-absolute-sym-lib.lds +++ /dev/null @@ -1,19 +0,0 @@ -/* BZ #19818 absolute symbol calculation linker script. - Copyright (C) 2018 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 Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - . */ - -"absolute" = 0x55aa; diff --git a/elf/tst-absolute-sym.c b/elf/tst-absolute-sym.c deleted file mode 100644 index 111491d159..0000000000 --- a/elf/tst-absolute-sym.c +++ /dev/null @@ -1,38 +0,0 @@ -/* BZ #19818 absolute symbol calculation main executable. - Copyright (C) 2018 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 Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - . */ - -#include -#include -#include - -void *get_absolute (void); - -static int -do_test (void) -{ - void *ref = (void *) 0x55aa; - void *ptr; - - ptr = get_absolute (); - if (ptr != ref) - FAIL_EXIT1 ("Got %p, expected %p\n", ptr, ref); - - return 0; -} - -#include diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h index 95dc87519b..3cac4fa362 100644 --- a/sysdeps/generic/ldsodefs.h +++ b/sysdeps/generic/ldsodefs.h @@ -72,8 +72,7 @@ typedef struct link_map *lookup_t; if non-NULL. Don't check for NULL map if MAP_SET is TRUE. */ #define SYMBOL_ADDRESS(map, ref, map_set) \ ((ref) == NULL ? 0 \ - : (__glibc_unlikely ((ref)->st_shndx == SHN_ABS) ? 0 \ - : LOOKUP_VALUE_ADDRESS (map, map_set)) + (ref)->st_value) + : LOOKUP_VALUE_ADDRESS (map, map_set) + (ref)->st_value) /* On some architectures a pointer to a function is not just a pointer to the actual code of the function but rather an architecture -- 2.18.0