| 1 | /* Machine-dependent ELF runtime symbol resolution, OpenRISC version. |
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| 2 | Copyright (C) 2022 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 <sysdep.h> |
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| 21 | |
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| 22 | /* This code is plugged into the PLT and used by the dynamic linker to |
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| 23 | call _dl_fixup (dl-runtime.c). |
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| 24 | |
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| 25 | We assume that R11 contains the relocation offset and R12 contains |
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| 26 | link_map (_DYNAMIC). This must be consistent with the JUMP_SLOT |
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| 27 | layout generated by binutils. */ |
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| 28 | |
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| 29 | ENTRY (_dl_runtime_resolve) |
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| 30 | l.sw -4(r1), r9 |
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| 31 | l.sw -8(r1), r1 |
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| 32 | |
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| 33 | /* save function arguments. */ |
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| 34 | l.sw -12(r1), r3 |
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| 35 | l.sw -16(r1), r4 |
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| 36 | l.sw -20(r1), r5 |
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| 37 | l.sw -24(r1), r6 |
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| 38 | l.sw -28(r1), r7 |
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| 39 | l.sw -32(r1), r8 |
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| 40 | |
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| 41 | .cfi_offset 9, -4 |
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| 42 | .cfi_offset 1, -8 |
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| 43 | .cfi_offset 3, -12 |
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| 44 | .cfi_offset 4, -16 |
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| 45 | .cfi_offset 5, -20 |
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| 46 | .cfi_offset 6, -24 |
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| 47 | .cfi_offset 7, -28 |
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| 48 | .cfi_offset 8, -32 |
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| 49 | |
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| 50 | l.addi r1,r1, -32 |
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| 51 | .cfi_def_cfa_offset 32 |
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| 52 | |
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| 53 | l.ori r3, r12, 0 |
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| 54 | l.ori r4, r11, 0 |
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| 55 | |
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| 56 | l.jal _dl_fixup |
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| 57 | l.nop |
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| 58 | |
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| 59 | /* Restore function arguments. */ |
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| 60 | l.addi r1,r1, 32 |
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| 61 | l.lwz r8, -32(r1) |
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| 62 | l.lwz r7, -28(r1) |
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| 63 | l.lwz r6, -24(r1) |
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| 64 | l.lwz r5, -20(r1) |
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| 65 | l.lwz r4, -16(r1) |
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| 66 | l.lwz r3, -12(r1) |
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| 67 | |
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| 68 | /* restore return address. */ |
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| 69 | l.lwz r9, -4(r1) |
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| 70 | |
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| 71 | l.jr r11 |
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| 72 | l.nop |
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| 73 | END (_dl_runtime_resolve) |
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| 74 | |
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