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