threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
118 lines
2.7 KiB
C
118 lines
2.7 KiB
C
/*
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* Copyright (C) 2015 MediaTek Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/kallsyms.h>
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#include <linux/interrupt.h>
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#include <linux/sched.h>
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#include <linux/sched/task_stack.h>
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#include <asm/signal.h>
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#include <mt-plat/sync_write.h>
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#include <mtk_ram_console.h>
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#include "backtrace.h"
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void dump_backtrace_entry_ramconsole_print (unsigned long where,
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unsigned long from, unsigned long frame)
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{
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char str_buf[256];
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int ret;
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#ifdef CONFIG_KALLSYMS
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ret = snprintf(str_buf, sizeof(str_buf),
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"[<%08lx>] (%pS) from [<%08lx>] (%pS)\n",
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where, (void *)where, from, (void *)from);
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if (ret < 0)
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pr_info("Fail snprintf: %d\n", ret);
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#else
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ret = snprintf(str_buf, sizeof(str_buf),
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"Function entered at [<%08lx>] from [<%08lx>]\n",
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where, from);
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if (ret < 0)
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pr_info("Fail snprintf: %d\n", ret);
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#endif
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aee_sram_fiq_log(str_buf);
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}
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void dump_regs(const char *fmt,
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const char v1, const unsigned int reg,
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const unsigned int reg_val)
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{
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char str_buf[256];
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int ret;
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ret = snprintf(str_buf, sizeof(str_buf), fmt, v1, reg, reg_val);
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if (ret < 0)
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pr_info("Fail snprintf in dump rg: %d\n", ret);
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aee_sram_fiq_log(str_buf);
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}
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static int verify_stack(unsigned long sp)
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{
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if (sp < PAGE_OFFSET || (sp > (unsigned long)high_memory
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&& high_memory != NULL))
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return -EFAULT;
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return 0;
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}
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void aee_dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
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{
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char str_buf[256];
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unsigned int fp, mode;
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int ok = 1;
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int ret;
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ret = snprintf(str_buf, sizeof(str_buf), "PC is 0x%lx, LR is 0x%lx\n",
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regs->ARM_pc, regs->ARM_lr);
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if (ret < 0)
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pr_info("Fail snprintf aee dump: %d\n", ret);
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aee_sram_fiq_log(str_buf);
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if (!tsk)
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tsk = current;
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if (regs) {
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fp = regs->ARM_fp;
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mode = processor_mode(regs);
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} else if (tsk != current) {
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fp = thread_saved_fp(tsk);
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mode = 0x10;
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} else {
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asm("mov %0, fp" : "=r" (fp) : : "cc");
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mode = 0x10;
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}
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if (!fp) {
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aee_sram_fiq_log("no frame pointer");
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ok = 0;
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} else if (verify_stack(fp)) {
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aee_sram_fiq_log("invalid frame pointer");
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ok = 0;
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} else if (fp < (unsigned long)end_of_stack(tsk))
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aee_sram_fiq_log("frame pointer underflow");
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aee_sram_fiq_log("\n");
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if (ok)
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c_backtrace_ramconsole_print(fp, mode);
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}
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