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From: Aurelien Jarno <aurel32@sourceware.org> To: glibc-cvs@sourceware.org Subject: [glibc/release/2.30/master] Add new file missed in previous hppa commit. Date: Mon, 4 May 2020 20:01:22 +0000 (GMT) [thread overview] Message-ID: <20200504200122.241DF388B02C@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=1c05b8f55112602ad9848cebad66b308bb43f21d commit 1c05b8f55112602ad9848cebad66b308bb43f21d Author: John David Anglin <danglin@gcc.gnu.org> Date: Mon Mar 30 21:58:06 2020 +0000 Add new file missed in previous hppa commit. (cherry picked from commit acdcca72940e060270e4e54d9c0457398110f409) Diff: --- sysdeps/hppa/dl-runtime.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) diff --git a/sysdeps/hppa/dl-runtime.c b/sysdeps/hppa/dl-runtime.c new file mode 100644 index 0000000000..885a3f1837 --- /dev/null +++ b/sysdeps/hppa/dl-runtime.c @@ -0,0 +1,58 @@ +/* On-demand PLT fixup for shared objects. HPPA version. + Copyright (C) 2019 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +/* Clear PA_GP_RELOC bit in relocation offset. */ +#define reloc_offset (reloc_arg & ~PA_GP_RELOC) +#define reloc_index (reloc_arg & ~PA_GP_RELOC) / sizeof (PLTREL) + +#include <elf/dl-runtime.c> + +/* The caller has encountered a partially relocated function descriptor. + The gp of the descriptor has been updated, but not the ip. We find + the function descriptor again and compute the relocation offset and + return that to the caller. The caller will continue on to call + _dl_fixup with the relocation offset. */ + +ElfW(Word) +attribute_hidden __attribute ((noinline)) ARCH_FIXUP_ATTRIBUTE +_dl_fix_reloc_arg (struct fdesc *fptr, struct link_map *l) +{ + Elf32_Addr l_addr, iplt, jmprel, end_jmprel, r_type; + const Elf32_Rela *reloc; + + l_addr = l->l_addr; + jmprel = D_PTR(l, l_info[DT_JMPREL]); + end_jmprel = jmprel + l->l_info[DT_PLTRELSZ]->d_un.d_val; + + /* Look for the entry... */ + for (iplt = jmprel; iplt < end_jmprel; iplt += sizeof (Elf32_Rela)) + { + reloc = (const Elf32_Rela *) iplt; + r_type = ELF32_R_TYPE (reloc->r_info); + + if (__builtin_expect (r_type == R_PARISC_IPLT, 1) + && fptr == (struct fdesc *) (reloc->r_offset + l_addr)) + /* Found entry. Return the reloc offset. */ + return iplt - jmprel; + } + + /* Crash if we weren't passed a valid function pointer. */ + ABORT_INSTRUCTION; + return 0; +}
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