From 4920638856fd2ee27d0f61330e75a05b8d719f02 Mon Sep 17 00:00:00 2001 From: Will Newton Date: Mon, 25 Nov 2013 14:44:59 +0000 Subject: [PATCH] bfd/elfnn-aarch64.c: Handle static links with ifunc correctly. The code for handling GOT references to ifunc symbols in static links was missing. bfd/ChangeLog: 2013-11-26 Will Newton * elfnn-aarch64.c (elfNN_aarch64_finish_dynamic_symbol): Handle STT_GNU_IFUNC symbols correctly in static links. ld/testsuite/ChangeLog: 2013-11-26 Will Newton * ld-aarch64/aarch64-elf.exp: Add ifunc-22. * ld-aarch64/ifunc-22.d: New file. * ld-aarch64/ifunc-22.s: Likewise. --- bfd/ChangeLog | 5 +++++ bfd/elfnn-aarch64.c | 30 ++++++++++++++++++++++++- ld/testsuite/ChangeLog | 6 +++++ ld/testsuite/ld-aarch64/aarch64-elf.exp | 1 + ld/testsuite/ld-aarch64/ifunc-22.d | 11 +++++++++ ld/testsuite/ld-aarch64/ifunc-22.s | 14 ++++++++++++ 6 files changed, 66 insertions(+), 1 deletion(-) create mode 100644 ld/testsuite/ld-aarch64/ifunc-22.d create mode 100644 ld/testsuite/ld-aarch64/ifunc-22.s diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 4bcbba842e2..17e1fab2084 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,8 @@ +2013-11-26 Will Newton + + * elfnn-aarch64.c (elfNN_aarch64_finish_dynamic_symbol): + Handle STT_GNU_IFUNC symbols correctly in static links. + 2013-11-26 Will Newton * elfnn-aarch64.c (elfNN_aarch64_final_link_relocate): Ensure diff --git a/bfd/elfnn-aarch64.c b/bfd/elfnn-aarch64.c index 7cce6f449a2..6a42bc59db5 100644 --- a/bfd/elfnn-aarch64.c +++ b/bfd/elfnn-aarch64.c @@ -6824,7 +6824,34 @@ elfNN_aarch64_finish_dynamic_symbol (bfd *output_bfd, + htab->root.sgot->output_offset + (h->got.offset & ~(bfd_vma) 1)); - if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h)) + if (h->def_regular + && h->type == STT_GNU_IFUNC) + { + if (info->shared) + { + /* Generate R_AARCH64_GLOB_DAT. */ + goto do_glob_dat; + } + else + { + asection *plt; + + if (!h->pointer_equality_needed) + abort (); + + /* For non-shared object, we can't use .got.plt, which + contains the real function address if we need pointer + equality. We load the GOT entry with the PLT entry. */ + plt = htab->root.splt ? htab->root.splt : htab->root.iplt; + bfd_put_NN (output_bfd, (plt->output_section->vma + + plt->output_offset + + h->plt.offset), + htab->root.sgot->contents + + (h->got.offset & ~(bfd_vma) 1)); + return TRUE; + } + } + else if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h)) { if (!h->def_regular) return FALSE; @@ -6837,6 +6864,7 @@ elfNN_aarch64_finish_dynamic_symbol (bfd *output_bfd, } else { +do_glob_dat: BFD_ASSERT ((h->got.offset & 1) == 0); bfd_put_NN (output_bfd, (bfd_vma) 0, htab->root.sgot->contents + h->got.offset); diff --git a/ld/testsuite/ChangeLog b/ld/testsuite/ChangeLog index 22a062dcbe9..bbd8eb35be0 100644 --- a/ld/testsuite/ChangeLog +++ b/ld/testsuite/ChangeLog @@ -1,3 +1,9 @@ +2013-11-26 Will Newton + + * ld-aarch64/aarch64-elf.exp: Add ifunc-22. + * ld-aarch64/ifunc-22.d: New file. + * ld-aarch64/ifunc-22.s: Likewise. + 2013-11-26 Will Newton * ld-aarch64/aarch64-elf.exp: Add ifunc-21 test. diff --git a/ld/testsuite/ld-aarch64/aarch64-elf.exp b/ld/testsuite/ld-aarch64/aarch64-elf.exp index a6b3ea2d2f3..692bf3448cc 100644 --- a/ld/testsuite/ld-aarch64/aarch64-elf.exp +++ b/ld/testsuite/ld-aarch64/aarch64-elf.exp @@ -156,3 +156,4 @@ run_dump_test "ifunc-19a" run_dump_test "ifunc-19b" run_dump_test "ifunc-20" run_dump_test "ifunc-21" +run_dump_test "ifunc-22" diff --git a/ld/testsuite/ld-aarch64/ifunc-22.d b/ld/testsuite/ld-aarch64/ifunc-22.d new file mode 100644 index 00000000000..f28b039739d --- /dev/null +++ b/ld/testsuite/ld-aarch64/ifunc-22.d @@ -0,0 +1,11 @@ +#source: ifunc-22.s +#objdump: -s -j .got +#ld: -static +#target: aarch64*-*-* + +# Ensure GOT is populated correctly in static link + +.*: file format elf64-(little|big)aarch64 + +Contents of section \.got: + 4100f0 00000000 00000000 d0004000 00000000 ..........@..... diff --git a/ld/testsuite/ld-aarch64/ifunc-22.s b/ld/testsuite/ld-aarch64/ifunc-22.s new file mode 100644 index 00000000000..69a87bbda4f --- /dev/null +++ b/ld/testsuite/ld-aarch64/ifunc-22.s @@ -0,0 +1,14 @@ + .text + .type ifunc, @gnu_indirect_function + .global ifunc +ifunc: + ret + .size ifunc, .-ifunc + .type _start, @function + .globl _start +_start: + adrp x0, :got:ifunc + ldr x0, [x0, #:got_lo12:ifunc] + .size _start, .-_start + .data + .xword ifunc -- 2.30.2