1// SPDX-License-Identifier: GPL-3.0-or-later
2
3#pragma once
4
5#include "mos/platform/platform_defs.hpp"
6#include "mos/syslog/printk.hpp"
7
8#include <mos/types.h>
9#include <stdarg.h>
10
11typedef void(kmsg_handler_t)(const char *func, u32 line, const char *fmt, va_list args);
12
13typedef struct
14{
15 bool *enabled;
16 void (*hook)(void);
17 const char *const name;
18 long long __padding;
19} panic_hook_t;
20
21MOS_STATIC_ASSERT(sizeof(panic_hook_t) == 32, "panic_hook_t size mismatch");
22
23typedef struct
24{
25 ptr_t ip;
26 const char *file, *func;
27 u64 line;
28} panic_point_t;
29
30#define MOS_EMIT_PANIC_HOOK(e, f, n) MOS_PUT_IN_SECTION(".mos.panic_hooks", panic_hook_t, f##_hook, { .enabled = e, .hook = f, .name = n })
31
32#define MOS_PANIC_HOOK_FEAT(_feat, _f, _n) MOS_EMIT_PANIC_HOOK(mos_debug_enabled_ptr(_feat), _f, _n)
33#define MOS_PANIC_HOOK(_f, _name) MOS_EMIT_PANIC_HOOK(NULL, _f, _name)
34
35void kwarn_handler_set(kmsg_handler_t *handler);
36void kwarn_handler_remove(void);
37
38__printf(3, 4) void mos_kwarn(const char *func, u32 line, const char *fmt, ...);
39
40void try_handle_kernel_panics(ptr_t ip);
41[[__noreturn__]] void handle_kernel_panic(const panic_point_t *point);
42
43#define MOS_MAKE_PANIC_POINT(panic_instruction, file, func, line) \
44 __asm__ volatile("1: " panic_instruction "\n\t" \
45 ".pushsection .mos.panic_list,\"aw\"\n\t" MOS_PLATFORM_PANIC_POINT_ASM ".popsection\n\t" \
46 "\n\t" \
47 : \
48 : "i"(file), "i"(func), "i"(line) \
49 : "memory")
50
51#define mos_panic(fmt, ...) \
52 do \
53 { \
54 pr_emerg(fmt, ##__VA_ARGS__); \
55 MOS_MAKE_PANIC_POINT(MOS_PLATFORM_PANIC_INSTR, __FILE__, __func__, __LINE__); \
56 __builtin_unreachable(); \
57 } while (0)
58
59#define mos_panic_inline(fmt, ...) \
60 do \
61 { \
62 pr_emerg(fmt, ##__VA_ARGS__); \
63 static const panic_point_t point = { .ip = 0, .file = __FILE__, .func = __func__, .line = __LINE__ }; \
64 handle_kernel_panic(&point); \
65 } while (0)
66