| /* 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) |