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/* Copyright 2016 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "compile_time_macros.h"
#include "ec_panicinfo.h"
static void print_panic_reg(int regnum, const uint32_t *regs, int index)
{
static const char * const regname[] = {
"r0 ", "r1 ", "r2 ", "r3 ", "r4 ",
"r5 ", "r6 ", "r7 ", "r8 ", "r9 ",
"r10", "r11", "r12", "sp ", "lr ",
"pc "};
printf("%s:", regname[regnum]);
if (regs)
printf("%08x", regs[index]);
else
printf(" ");
printf((regnum & 3) == 3 ? "\n" : " ");
}
static int parse_panic_info_cm(const struct panic_data *pdata)
{
const uint32_t *lregs = pdata->cm.regs;
const uint32_t *sregs = NULL;
enum {
ORIG_UNKNOWN = 0,
ORIG_PROCESS,
ORIG_HANDLER
} origin = ORIG_UNKNOWN;
int i;
const char *panic_origins[3] = {"", "PROCESS", "HANDLER"};
printf("Saved panic data:%s\n",
(pdata->flags & PANIC_DATA_FLAG_OLD_HOSTCMD ? "" : " (NEW)"));
if (pdata->struct_version == 2)
origin = ((lregs[11] & 0xf) == 1 || (lregs[11] & 0xf) == 9) ?
ORIG_HANDLER : ORIG_PROCESS;
/*
* In pdata struct, 'regs', which is allocated before 'frame', has
* one less elements in version 1. Therefore, if the data is from
* version 1, shift 'sregs' by one element to align with 'frame' in
* version 1.
*/
if (pdata->flags & PANIC_DATA_FLAG_FRAME_VALID)
sregs = pdata->cm.frame - (pdata->struct_version == 1 ? 1 : 0);
printf("=== %s EXCEPTION: %02x ====== xPSR: %08x ===\n",
panic_origins[origin],
lregs[1] & 0xff, sregs ? sregs[7] : -1);
for (i = 0; i < 4; ++i)
print_panic_reg(i, sregs, i);
for (i = 4; i < 10; ++i)
print_panic_reg(i, lregs, i - 1);
print_panic_reg(10, lregs, 9);
print_panic_reg(11, lregs, 10);
print_panic_reg(12, sregs, 4);
print_panic_reg(13, lregs, origin == ORIG_HANDLER ? 2 : 0);
print_panic_reg(14, sregs, 5);
print_panic_reg(15, sregs, 6);
return 0;
}
static int parse_panic_info_nds32(const struct panic_data *pdata)
{
const uint32_t *regs = pdata->nds_n8.regs;
uint32_t itype = pdata->nds_n8.itype;
uint32_t ipc = pdata->nds_n8.ipc;
uint32_t ipsw = pdata->nds_n8.ipsw;
printf("Saved panic data:%s\n",
(pdata->flags & PANIC_DATA_FLAG_OLD_HOSTCMD ? "" : " (NEW)"));
printf("=== EXCEP: ITYPE=%x ===\n", itype);
printf("R0 %08x R1 %08x R2 %08x R3 %08x\n",
regs[0], regs[1], regs[2], regs[3]);
printf("R4 %08x R5 %08x R6 %08x R7 %08x\n",
regs[4], regs[5], regs[6], regs[7]);
printf("R8 %08x R9 %08x R10 %08x R15 %08x\n",
regs[8], regs[9], regs[10], regs[11]);
printf("FP %08x GP %08x LP %08x SP %08x\n",
regs[12], regs[13], regs[14], regs[15]);
printf("IPC %08x IPSW %05x\n", ipc, ipsw);
printf("SWID of ITYPE: %x\n", ((itype >> 16) & 0x7fff));
return 0;
}
static int parse_panic_info_rv32i(const struct panic_data *pdata)
{
uint32_t *regs, mcause, mepc;
regs = (uint32_t *)pdata->riscv.regs;
mcause = pdata->riscv.mcause;
mepc = pdata->riscv.mepc;
printf("=== EXCEPTION: MCAUSE=%x ===\n", mcause);
printf("S11 %08x S10 %08x S9 %08x S8 %08x\n",
regs[0], regs[1], regs[2], regs[3]);
printf("S7 %08x S6 %08x S5 %08x S4 %08x\n",
regs[4], regs[5], regs[6], regs[7]);
printf("S3 %08x S2 %08x S1 %08x S0 %08x\n",
regs[8], regs[9], regs[10], regs[11]);
printf("T6 %08x T5 %08x T4 %08x T3 %08x\n",
regs[12], regs[13], regs[14], regs[15]);
printf("T2 %08x T1 %08x T0 %08x A7 %08x\n",
regs[16], regs[17], regs[18], regs[19]);
printf("A6 %08x A5 %08x A4 %08x A3 %08x\n",
regs[20], regs[21], regs[22], regs[23]);
printf("A2 %08x A1 %08x A0 %08x TP %08x\n",
regs[24], regs[25], regs[26], regs[27]);
printf("GP %08x RA %08x SP %08x MEPC %08x\n",
regs[28], regs[29], regs[30], mepc);
return 0;
}
int parse_panic_info(const char *data, size_t size)
{
/* Size of the panic information "header". */
const size_t header_size = 4;
/* Size of the panic information "trailer" (struct_size and magic). */
const size_t trailer_size = sizeof(struct panic_data) -
offsetof(struct panic_data, struct_size);
struct panic_data pdata = { 0 };
size_t copy_size;
if (size < (header_size + trailer_size)) {
fprintf(stderr, "ERROR: Panic data too short (%zd).\n", size);
return -1;
}
if (size > sizeof(pdata)) {
fprintf(stderr, "WARNING: Panic data too large (%zd > %zd). "
"Following data may be incorrect!\n",
size, sizeof(pdata));
copy_size = sizeof(pdata);
} else {
copy_size = size;
}
/* Copy the data into pdata, as the struct size may have changed. */
memcpy(&pdata, data, copy_size);
/* Then copy the trailer in position. */
memcpy((char *)&pdata + (sizeof(struct panic_data) - trailer_size),
data + (size - trailer_size), trailer_size);
/*
* We only understand panic data with version <= 2. Warn the user
* of higher versions.
*/
if (pdata.struct_version > 2)
fprintf(stderr, "WARNING: Unknown panic data version (%d). "
"Following data may be incorrect!\n",
pdata.struct_version);
/* Validate magic number */
if (pdata.magic != PANIC_DATA_MAGIC)
fprintf(stderr, "WARNING: Incorrect panic magic (%d). "
"Following data may be incorrect!\n",
pdata.magic);
if (pdata.struct_size != size)
fprintf(stderr,
"WARNING: Panic struct size inconsistent (%u vs %zd). "
"Following data may be incorrect!\n",
pdata.struct_size, size);
switch (pdata.arch) {
case PANIC_ARCH_CORTEX_M:
return parse_panic_info_cm(&pdata);
case PANIC_ARCH_NDS32_N8:
return parse_panic_info_nds32(&pdata);
case PANIC_ARCH_RISCV_RV32I:
return parse_panic_info_rv32i(&pdata);
default:
fprintf(stderr, "ERROR: Unknown architecture (%d).\n",
pdata.arch);
break;
}
return -1;
}
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