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glibc
0001-elf-avoid-redundant-sort-in-dlopen.patch
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File 0001-elf-avoid-redundant-sort-in-dlopen.patch of Package glibc
From 3999e1044703b878b661628041063fb4c4029e97 Mon Sep 17 00:00:00 2001 From: David Kilroy <David.Kilroy@arm.com> Date: Wed, 12 Feb 2020 14:30:31 -0300 Subject: [PATCH 1/8] elf: avoid redundant sort in dlopen l_initfini is already sorted by dependency in _dl_map_object_deps(), so avoid sorting again in dl_open_worker(). Tested by running the testsuite on x86_64. --- elf/dl-open.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/elf/dl-open.c b/elf/dl-open.c index ecb2ba9cc1..314adc2f7e 100644 --- a/elf/dl-open.c +++ b/elf/dl-open.c @@ -617,9 +617,10 @@ dl_open_worker (void *a) if (GLRO(dl_lazy)) reloc_mode |= mode & RTLD_LAZY; - /* 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. */ + /* Objects must be sorted by dependency for the relocation process. + This allows IFUNC relocations to work and it also means copy + relocation of dependencies are if necessary overwritten. + __dl_map_object_deps has already sorted l_initfini for us. */ unsigned int nmaps = 0; unsigned int j = 0; struct link_map *l = new->l_initfini[0]; @@ -642,7 +643,6 @@ dl_open_worker (void *a) l = new->l_initfini[++j]; } while (l != NULL); - _dl_sort_maps (maps, nmaps, NULL, false); int relocation_in_progress = 0; -- 2.35.3
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