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')
16 #define APPLE_RTKIT_CRASHLOG_REGS FOURCC('C', 'r', 'g', '8')
18 /* For COMPILE_TEST on non-ARM64 architectures */
20 #define PSR_MODE_EL0t 0x00000000
21 #define PSR_MODE_EL1t 0x00000004
22 #define PSR_MODE_EL1h 0x00000005
23 #define PSR_MODE_EL2t 0x00000008
24 #define PSR_MODE_EL2h 0x00000009
25 #define PSR_MODE_MASK 0x0000000f
28 struct apple_rtkit_crashlog_header {
35 static_assert(sizeof(struct apple_rtkit_crashlog_header) == 0x20);
37 struct apple_rtkit_crashlog_mbox_entry {
43 static_assert(sizeof(struct apple_rtkit_crashlog_mbox_entry) == 0x18);
45 struct apple_rtkit_crashlog_regs {
61 static_assert(sizeof(struct apple_rtkit_crashlog_regs) == 0x350);
63 static void apple_rtkit_crashlog_dump_str(struct apple_rtkit *rtk, u8 *bfr,
74 u8 *newline = memchr(ptr, '\n', end - ptr);
79 dev_warn(rtk->dev, "RTKit: Message (id=%x): %s\n", idx,
84 dev_warn(rtk->dev, "RTKit: Message (id=%x): %s", idx,
91 static void apple_rtkit_crashlog_dump_version(struct apple_rtkit *rtk, u8 *bfr,
94 dev_warn(rtk->dev, "RTKit: Version: %s", bfr + 16);
97 static void apple_rtkit_crashlog_dump_time(struct apple_rtkit *rtk, u8 *bfr,
102 memcpy(&crash_time, bfr, 8);
103 dev_warn(rtk->dev, "RTKit: Crash time: %lld", crash_time);
106 static void apple_rtkit_crashlog_dump_mailbox(struct apple_rtkit *rtk, u8 *bfr,
111 struct apple_rtkit_crashlog_mbox_entry entry;
113 memcpy(&type, bfr + 16, 4);
114 memcpy(&index, bfr + 24, 4);
115 n_messages = (size - 28) / sizeof(entry);
117 dev_warn(rtk->dev, "RTKit: Mailbox history (type = %d, index = %d)",
119 for (i = 0; i < n_messages; ++i) {
120 memcpy(&entry, bfr + 28 + i * sizeof(entry), sizeof(entry));
121 dev_warn(rtk->dev, "RTKit: #%03d@%08x: %016llx %016llx", i,
122 entry.timestamp, entry.msg0, entry.msg1);
126 static void apple_rtkit_crashlog_dump_regs(struct apple_rtkit *rtk, u8 *bfr,
129 struct apple_rtkit_crashlog_regs *regs;
133 if (size < sizeof(*regs)) {
134 dev_warn(rtk->dev, "RTKit: Regs section too small: 0x%zx", size);
138 regs = (struct apple_rtkit_crashlog_regs *)bfr;
140 switch (regs->psr & PSR_MODE_MASK) {
161 dev_warn(rtk->dev, "RTKit: Exception dump:");
162 dev_warn(rtk->dev, " == Exception taken from %s ==", el);
163 dev_warn(rtk->dev, " PSR = 0x%llx", regs->psr);
164 dev_warn(rtk->dev, " PC = 0x%llx\n", regs->pc);
165 dev_warn(rtk->dev, " ESR = 0x%llx\n", regs->esr);
166 dev_warn(rtk->dev, " FAR = 0x%llx\n", regs->far);
167 dev_warn(rtk->dev, " SP = 0x%llx\n", regs->sp);
168 dev_warn(rtk->dev, "\n");
170 for (i = 0; i < 31; i += 4) {
173 " x%02d-x%02d = %016llx %016llx %016llx %016llx\n",
175 regs->regs[i], regs->regs[i + 1],
176 regs->regs[i + 2], regs->regs[i + 3]);
179 " x%02d-x%02d = %016llx %016llx %016llx\n", i, i + 3,
180 regs->regs[i], regs->regs[i + 1], regs->regs[i + 2]);
183 dev_warn(rtk->dev, "\n");
186 void apple_rtkit_crashlog_dump(struct apple_rtkit *rtk, u8 *bfr, size_t size)
189 u32 section_fourcc, section_size;
190 struct apple_rtkit_crashlog_header header;
192 memcpy(&header, bfr, sizeof(header));
193 if (header.fourcc != APPLE_RTKIT_CRASHLOG_HEADER) {
194 dev_warn(rtk->dev, "RTKit: Expected crashlog header but got %x",
199 if (header.size > size) {
200 dev_warn(rtk->dev, "RTKit: Crashlog size (%x) is too large",
206 offset = sizeof(header);
208 while (offset < size) {
209 memcpy(§ion_fourcc, bfr + offset, 4);
210 memcpy(§ion_size, bfr + offset + 12, 4);
212 switch (section_fourcc) {
213 case APPLE_RTKIT_CRASHLOG_HEADER:
214 dev_dbg(rtk->dev, "RTKit: End of crashlog reached");
216 case APPLE_RTKIT_CRASHLOG_STR:
217 apple_rtkit_crashlog_dump_str(rtk, bfr + offset + 16,
220 case APPLE_RTKIT_CRASHLOG_VERSION:
221 apple_rtkit_crashlog_dump_version(
222 rtk, bfr + offset + 16, section_size);
224 case APPLE_RTKIT_CRASHLOG_MBOX:
225 apple_rtkit_crashlog_dump_mailbox(
226 rtk, bfr + offset + 16, section_size);
228 case APPLE_RTKIT_CRASHLOG_TIME:
229 apple_rtkit_crashlog_dump_time(rtk, bfr + offset + 16,
232 case APPLE_RTKIT_CRASHLOG_REGS:
233 apple_rtkit_crashlog_dump_regs(rtk, bfr + offset + 16,
238 "RTKit: Unknown crashlog section: %x",
242 offset += section_size;
246 "RTKit: End of crashlog reached but no footer present");