Arve Hjønnevåg | 60c384b | 2014-05-02 20:31:07 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 Google, Inc. |
| 3 | * |
| 4 | * This software is licensed under the terms of the GNU General Public |
| 5 | * License version 2, as published by the Free Software Foundation, and |
| 6 | * may be copied, distributed, and modified under those terms. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | */ |
| 14 | |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/spinlock.h> |
| 17 | #include <linux/pstore_ram.h> |
| 18 | |
| 19 | #include "fiq_watchdog.h" |
| 20 | #include "fiq_debugger_priv.h" |
| 21 | |
| 22 | static DEFINE_RAW_SPINLOCK(fiq_watchdog_lock); |
| 23 | |
| 24 | static void fiq_watchdog_printf(struct fiq_debugger_output *output, |
| 25 | const char *fmt, ...) |
| 26 | { |
| 27 | char buf[256]; |
| 28 | va_list ap; |
| 29 | int len; |
| 30 | |
| 31 | va_start(ap, fmt); |
| 32 | len = vscnprintf(buf, sizeof(buf), fmt, ap); |
| 33 | va_end(ap); |
| 34 | |
| 35 | ramoops_console_write_buf(buf, len); |
| 36 | } |
| 37 | |
| 38 | struct fiq_debugger_output fiq_watchdog_output = { |
| 39 | .printf = fiq_watchdog_printf, |
| 40 | }; |
| 41 | |
| 42 | void fiq_watchdog_triggered(const struct pt_regs *regs, void *svc_sp) |
| 43 | { |
| 44 | char msg[24]; |
| 45 | int len; |
| 46 | |
| 47 | raw_spin_lock(&fiq_watchdog_lock); |
| 48 | |
| 49 | len = scnprintf(msg, sizeof(msg), "watchdog fiq cpu %d\n", |
| 50 | THREAD_INFO(svc_sp)->cpu); |
| 51 | ramoops_console_write_buf(msg, len); |
| 52 | |
| 53 | fiq_debugger_dump_stacktrace(&fiq_watchdog_output, regs, 100, svc_sp); |
| 54 | |
| 55 | raw_spin_unlock(&fiq_watchdog_lock); |
| 56 | } |