| 1 | /* On-demand PLT fixup for shared objects. HPPA version. |
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| 2 | Copyright (C) 2019-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, write to the Free |
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| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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| 18 | 02111-1307 USA. */ |
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| 19 | |
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| 20 | #include <elf/dl-runtime.c> |
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| 21 | |
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| 22 | /* The caller has encountered a partially relocated function descriptor. |
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| 23 | The gp of the descriptor has been updated, but not the ip. We find |
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| 24 | the function descriptor again and compute the relocation offset and |
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| 25 | return that to the caller. The caller will continue on to call |
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| 26 | _dl_fixup with the relocation offset. */ |
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| 27 | |
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| 28 | ElfW(Word) __attribute ((noinline)) DL_ARCH_FIXUP_ATTRIBUTE |
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| 29 | _dl_fix_reloc_arg (struct fdesc *fptr, struct link_map *l) |
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| 30 | { |
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| 31 | Elf32_Addr l_addr, iplt, jmprel, end_jmprel, r_type; |
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| 32 | const Elf32_Rela *reloc; |
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| 33 | |
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| 34 | l_addr = l->l_addr; |
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| 35 | jmprel = D_PTR(l, l_info[DT_JMPREL]); |
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| 36 | end_jmprel = jmprel + l->l_info[DT_PLTRELSZ]->d_un.d_val; |
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| 37 | |
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| 38 | /* Look for the entry... */ |
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| 39 | for (iplt = jmprel; iplt < end_jmprel; iplt += sizeof (Elf32_Rela)) |
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| 40 | { |
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| 41 | reloc = (const Elf32_Rela *) iplt; |
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| 42 | r_type = ELF32_R_TYPE (reloc->r_info); |
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| 43 | |
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| 44 | if (__builtin_expect (r_type == R_PARISC_IPLT, 1) |
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| 45 | && fptr == (struct fdesc *) (reloc->r_offset + l_addr)) |
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| 46 | /* Found entry. Return the reloc offset. */ |
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| 47 | return iplt - jmprel; |
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| 48 | } |
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| 49 | |
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| 50 | /* Crash if we weren't passed a valid function pointer. */ |
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| 51 | ABORT_INSTRUCTION; |
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| 52 | return 0; |
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| 53 | } |
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| 54 | rtld_hidden_def (_dl_fix_reloc_arg) |
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| 55 | |
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