From fbcc8bafeb413a111cd3caab39b3ab57d5b8ce93 Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Fri, 7 Dec 2018 15:39:49 -0800 Subject: [PATCH] Override the previous definition from IR object Mark the previous definition from IR object as undefined so that the generic linker will override it. bfd/ PR ld/23958 * elflink.c (_bfd_elf_add_default_symbol): Override the previous definition from IR object. ld/ PR ld/23958 * testsuite/ld-plugin/lto.exp: Run PR ld/23958 test. * testsuite/ld-plugin/pr23958.c: New file. * testsuite/ld-plugin/pr23958.t: Likewise. --- bfd/ChangeLog | 6 ++++++ bfd/elflink.c | 9 +++++++++ ld/ChangeLog | 7 +++++++ ld/testsuite/ld-plugin/lto.exp | 6 ++++++ ld/testsuite/ld-plugin/pr23958.c | 6 ++++++ ld/testsuite/ld-plugin/pr23958.t | 4 ++++ 6 files changed, 38 insertions(+) create mode 100644 ld/testsuite/ld-plugin/pr23958.c create mode 100644 ld/testsuite/ld-plugin/pr23958.t diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 85277a15b1d..aa8be343f5a 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,9 @@ +2018-12-07 H.J. Lu + + PR ld/23958 + * elflink.c (_bfd_elf_add_default_symbol): Override the previous + definition from IR object. + 2018-12-08 Stafford Horne * elf32-or1k.c (or1k_grok_prstatus): New function. diff --git a/bfd/elflink.c b/bfd/elflink.c index 4eca389bd18..8992a5016f7 100644 --- a/bfd/elflink.c +++ b/bfd/elflink.c @@ -1941,6 +1941,15 @@ _bfd_elf_add_default_symbol (bfd *abfd, if (! bfd_link_relocatable (info)) { bh = &hi->root; + if (bh->type == bfd_link_hash_defined + && (bh->u.def.section->owner->flags & BFD_PLUGIN) != 0) + { + /* Mark the previous definition from IR object as + undefined so that the generic linker will override + it. */ + bh->type = bfd_link_hash_undefined; + bh->u.undef.abfd = bh->u.def.section->owner; + } if (! (_bfd_generic_link_add_one_symbol (info, abfd, shortname, BSF_INDIRECT, bfd_ind_section_ptr, diff --git a/ld/ChangeLog b/ld/ChangeLog index c8c48c5c1a3..75c9c7d11df 100644 --- a/ld/ChangeLog +++ b/ld/ChangeLog @@ -1,3 +1,10 @@ +2018-12-07 H.J. Lu + + PR ld/23958 + * testsuite/ld-plugin/lto.exp: Run PR ld/23958 test. + * testsuite/ld-plugin/pr23958.c: New file. + * testsuite/ld-plugin/pr23958.t: Likewise. + 2018-12-07 H.J. Lu * NEWS: Updated for property change report. diff --git a/ld/testsuite/ld-plugin/lto.exp b/ld/testsuite/ld-plugin/lto.exp index 008bde79de7..b56bd63ef46 100644 --- a/ld/testsuite/ld-plugin/lto.exp +++ b/ld/testsuite/ld-plugin/lto.exp @@ -225,6 +225,12 @@ set lto_link_tests [list \ {pr23818a.c pr23818b.c} \ {{"readelf" {-s --wide} "pr23818.d"}} \ "libpr23818.so"] \ + [list "Build libpr23958.so" \ + "-shared -flto -Wl,-version-script,pr23958.t" \ + "-g -flto $lto_fat" \ + {pr23958.c} \ + "" \ + "libpr23958.so"] \ ] if { [at_least_gcc_version 4 7] } { diff --git a/ld/testsuite/ld-plugin/pr23958.c b/ld/testsuite/ld-plugin/pr23958.c new file mode 100644 index 00000000000..656dc317067 --- /dev/null +++ b/ld/testsuite/ld-plugin/pr23958.c @@ -0,0 +1,6 @@ +void +dwarf_bytesize (void) +{ +} + +asm (".symver dwarf_bytesize,dwarf_bytesize@@@ELFUTILS_0.143"); diff --git a/ld/testsuite/ld-plugin/pr23958.t b/ld/testsuite/ld-plugin/pr23958.t new file mode 100644 index 00000000000..d3af1ae0cd9 --- /dev/null +++ b/ld/testsuite/ld-plugin/pr23958.t @@ -0,0 +1,4 @@ +ELFUTILS_0.143 { +global: + dwarf_bytesize; +}; -- 2.30.2