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| 1 | /* Machine-dependent definitions for profiling support. Nios II version. |
|---|---|
| 2 | Copyright (C) 1996-2022 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library. If not, see |
| 17 | <https://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <sysdep.h> |
| 20 | |
| 21 | #define _MCOUNT_DECL(frompc, selfpc) \ |
| 22 | static void __attribute_used__ __mcount_internal (u_long frompc, u_long selfpc) |
| 23 | |
| 24 | /* This macro/func MUST save r4, r5, r6, r7 and r8 because the compiler inserts |
| 25 | blind calls to mcount(), ignoring the fact that mcount may clobber |
| 26 | registers; therefore, mcount may NOT clobber registers. */ |
| 27 | |
| 28 | #if defined(__PIC__) || defined(PIC) |
| 29 | #define NIOS2_MCOUNT_CALL \ |
| 30 | "nextpc r3\n\t" \ |
| 31 | "1: movhi r2, %hiadj(_gp_got - 1b)\n\t" \ |
| 32 | "addi r2, r2, %lo(_gp_got - 1b)\n\t" \ |
| 33 | "add r2, r2, r3\n\t" \ |
| 34 | "ldw r2, %call(__mcount_internal)(r2)\n\t" \ |
| 35 | "callr r2\n\t" |
| 36 | #else |
| 37 | #define NIOS2_MCOUNT_CALL \ |
| 38 | "call\t__mcount_internal\n\t" |
| 39 | #endif |
| 40 | |
| 41 | #define MCOUNT \ |
| 42 | asm (".globl _mcount\n\t" \ |
| 43 | ".type _mcount,@function\n\t" \ |
| 44 | "_mcount:\n\t" \ |
| 45 | "subi sp, sp, 24\n\t" \ |
| 46 | "stw ra, 20(sp)\n\t" \ |
| 47 | "stw r8, 16(sp)\n\t" \ |
| 48 | "stw r7, 12(sp)\n\t" \ |
| 49 | "stw r6, 8(sp)\n\t" \ |
| 50 | "stw r5, 4(sp)\n\t" \ |
| 51 | "stw r4, 0(sp)\n\t" \ |
| 52 | "mov r4, r8\n\t" \ |
| 53 | "mov r5, ra\n\t" \ |
| 54 | NIOS2_MCOUNT_CALL \ |
| 55 | "ldw ra, 20(sp)\n\t" \ |
| 56 | "ldw r8, 16(sp)\n\t" \ |
| 57 | "ldw r7, 12(sp)\n\t" \ |
| 58 | "ldw r6, 8(sp)\n\t" \ |
| 59 | "ldw r5, 4(sp)\n\t" \ |
| 60 | "ldw r4, 0(sp)\n\t" \ |
| 61 | "addi sp, sp, 24\n\t" \ |
| 62 | "ret\n\t" \ |
| 63 | ".size _mcount, . - _mcount\n\t" \ |
| 64 | ); |
| 65 |
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