| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| /* |
| * Copyright (C) 2025 Feng Jiang <jiangfeng@kylinos.cn> |
| */ |
| |
| #include <linux/linkage.h> |
| #include <asm/asm.h> |
| |
| /* char *strrchr(const char *s, int c) */ |
| SYM_FUNC_START(strrchr) |
| /* |
| * Parameters |
| * a0 - The string to be searched |
| * a1 - The character to seaerch for |
| * |
| * Returns |
| * a0 - Address of last occurrence of 'c' or 0 |
| * |
| * Clobbers |
| * t0, t1 |
| */ |
| andi a1, a1, 0xff |
| mv t1, a0 |
| li a0, 0 |
| 1: |
| lbu t0, 0(t1) |
| bne t0, a1, 2f |
| mv a0, t1 |
| 2: |
| addi t1, t1, 1 |
| bnez t0, 1b |
| ret |
| SYM_FUNC_END(strrchr) |
| |
| SYM_FUNC_ALIAS_WEAK(__pi_strrchr, strrchr) |
| EXPORT_SYMBOL(strrchr) |
