mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-02 01:40:07 +00:00
59 lines
2.2 KiB
C
59 lines
2.2 KiB
C
/* 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;
|
|
}
|