1 // SPDX-License-Identifier: GPL-2.0-only OR MIT
3 * Apple RTKit IPC library
4 * Copyright (C) The Asahi Linux Contributors
6 #include "rtkit-internal.h"
8 #define FOURCC(a, b, c, d) \
9 (((u32)(a) << 24) | ((u32)(b) << 16) | ((u32)(c) << 8) | ((u32)(d)))
11 #define APPLE_RTKIT_CRASHLOG_HEADER FOURCC('C', 'L', 'H', 'E')
12 #define APPLE_RTKIT_CRASHLOG_STR FOURCC('C', 's', 't', 'r')
13 #define APPLE_RTKIT_CRASHLOG_VERSION FOURCC('C', 'v', 'e', 'r')
14 #define APPLE_RTKIT_CRASHLOG_MBOX FOURCC('C', 'm', 'b', 'x')
15 #define APPLE_RTKIT_CRASHLOG_TIME FOURCC('C', 't', 'i', 'm')
17 struct apple_rtkit_crashlog_header {
24 static_assert(sizeof(struct apple_rtkit_crashlog_header) == 0x20);
26 struct apple_rtkit_crashlog_mbox_entry {
32 static_assert(sizeof(struct apple_rtkit_crashlog_mbox_entry) == 0x18);
34 static void apple_rtkit_crashlog_dump_str(struct apple_rtkit *rtk, u8 *bfr,
45 u8 *newline = memchr(ptr, '\n', end - ptr);
50 dev_warn(rtk->dev, "RTKit: Message (id=%x): %s\n", idx,
55 dev_warn(rtk->dev, "RTKit: Message (id=%x): %s", idx,
62 static void apple_rtkit_crashlog_dump_version(struct apple_rtkit *rtk, u8 *bfr,
65 dev_warn(rtk->dev, "RTKit: Version: %s", bfr + 16);
68 static void apple_rtkit_crashlog_dump_time(struct apple_rtkit *rtk, u8 *bfr,
73 memcpy(&crash_time, bfr, 8);
74 dev_warn(rtk->dev, "RTKit: Crash time: %lld", crash_time);
77 static void apple_rtkit_crashlog_dump_mailbox(struct apple_rtkit *rtk, u8 *bfr,
82 struct apple_rtkit_crashlog_mbox_entry entry;
84 memcpy(&type, bfr + 16, 4);
85 memcpy(&index, bfr + 24, 4);
86 n_messages = (size - 28) / sizeof(entry);
88 dev_warn(rtk->dev, "RTKit: Mailbox history (type = %d, index = %d)",
90 for (i = 0; i < n_messages; ++i) {
91 memcpy(&entry, bfr + 28 + i * sizeof(entry), sizeof(entry));
92 dev_warn(rtk->dev, "RTKit: #%03d@%08x: %016llx %016llx", i,
93 entry.timestamp, entry.msg0, entry.msg1);
97 void apple_rtkit_crashlog_dump(struct apple_rtkit *rtk, u8 *bfr, size_t size)
100 u32 section_fourcc, section_size;
101 struct apple_rtkit_crashlog_header header;
103 memcpy(&header, bfr, sizeof(header));
104 if (header.fourcc != APPLE_RTKIT_CRASHLOG_HEADER) {
105 dev_warn(rtk->dev, "RTKit: Expected crashlog header but got %x",
110 if (header.size > size) {
111 dev_warn(rtk->dev, "RTKit: Crashlog size (%x) is too large",
117 offset = sizeof(header);
119 while (offset < size) {
120 memcpy(§ion_fourcc, bfr + offset, 4);
121 memcpy(§ion_size, bfr + offset + 12, 4);
123 switch (section_fourcc) {
124 case APPLE_RTKIT_CRASHLOG_HEADER:
125 dev_dbg(rtk->dev, "RTKit: End of crashlog reached");
127 case APPLE_RTKIT_CRASHLOG_STR:
128 apple_rtkit_crashlog_dump_str(rtk, bfr + offset + 16,
131 case APPLE_RTKIT_CRASHLOG_VERSION:
132 apple_rtkit_crashlog_dump_version(
133 rtk, bfr + offset + 16, section_size);
135 case APPLE_RTKIT_CRASHLOG_MBOX:
136 apple_rtkit_crashlog_dump_mailbox(
137 rtk, bfr + offset + 16, section_size);
139 case APPLE_RTKIT_CRASHLOG_TIME:
140 apple_rtkit_crashlog_dump_time(rtk, bfr + offset + 16,
145 "RTKit: Unknown crashlog section: %x",
149 offset += section_size;
153 "RTKit: End of crashlog reached but no footer present");