diff options
| -rw-r--r-- | sysdeps/hppa/dl-runtime.c | 58 |
1 files changed, 58 insertions, 0 deletions
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; +} |