| /* 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) |
