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d2224ffbdd
This change fixes two warnings from _dl_lookup_address. The first warning comes from dropping the volatile keyword from desc in the call to _dl_read_access_allowed. We now have a full atomic barrier between loading desc[0] and the access check, so desc no longer needs to be declared as volatile. The second warning comes from the implicit declaration of _dl_fix_reloc_arg. This is fixed by including dl-runtime.h and declaring _dl_fix_reloc_arg in dl-runtime.h.
55 lines
2.1 KiB
C
55 lines
2.1 KiB
C
/* On-demand PLT fixup for shared objects. HPPA version.
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Copyright (C) 2019-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <elf/dl-runtime.c>
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/* The caller has encountered a partially relocated function descriptor.
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The gp of the descriptor has been updated, but not the ip. We find
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the function descriptor again and compute the relocation offset and
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return that to the caller. The caller will continue on to call
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_dl_fixup with the relocation offset. */
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ElfW(Word) __attribute ((noinline)) DL_ARCH_FIXUP_ATTRIBUTE
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_dl_fix_reloc_arg (struct fdesc *fptr, struct link_map *l)
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{
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Elf32_Addr l_addr, iplt, jmprel, end_jmprel, r_type;
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const Elf32_Rela *reloc;
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l_addr = l->l_addr;
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jmprel = D_PTR(l, l_info[DT_JMPREL]);
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end_jmprel = jmprel + l->l_info[DT_PLTRELSZ]->d_un.d_val;
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/* Look for the entry... */
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for (iplt = jmprel; iplt < end_jmprel; iplt += sizeof (Elf32_Rela))
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{
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reloc = (const Elf32_Rela *) iplt;
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r_type = ELF32_R_TYPE (reloc->r_info);
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if (__builtin_expect (r_type == R_PARISC_IPLT, 1)
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&& fptr == (struct fdesc *) (reloc->r_offset + l_addr))
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/* Found entry. Return the reloc offset. */
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return iplt - jmprel;
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}
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/* Crash if we weren't passed a valid function pointer. */
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ABORT_INSTRUCTION;
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return 0;
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}
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rtld_hidden_def (_dl_fix_reloc_arg)
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