| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Based on arch/arm/lib/strrchr.S |
| * |
| * Copyright (C) 1995-2000 Russell King |
| * Copyright (C) 2013 ARM Ltd. |
| */ |
| |
| #include <linux/linkage.h> |
| #include <asm/assembler.h> |
| |
| /* |
| * Find the last occurrence of a character in a string. |
| * |
| * Parameters: |
| * x0 - str |
| * x1 - c |
| * Returns: |
| * x0 - address of last occurrence of 'c' or 0 |
| */ |
| SYM_FUNC_START_WEAK_PI(strrchr) |
| mov x3, #0 |
| and w1, w1, #0xff |
| 1: ldrb w2, [x0], #1 |
| cbz w2, 2f |
| cmp w2, w1 |
| b.ne 1b |
| sub x3, x0, #1 |
| b 1b |
| 2: mov x0, x3 |
| ret |
| SYM_FUNC_END_PI(strrchr) |
| EXPORT_SYMBOL_NOKASAN(strrchr) |
