^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * linux/arch/h8300/boot/traps.c -- general exception handling code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * H8/300 support Yoshinori Sato <ysato@users.sourceforge.jp>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Cloned from Linux/m68k.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * No original Copyright holder listed,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Probable original (C) Roman Zippel (assigned DJD, 1999)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * Copyright 1999-2000 D. Jeff Dionne, <jeff@rt-control.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * License. See the file COPYING in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/sched/debug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/mm_types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/bug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <asm/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <asm/traps.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static DEFINE_SPINLOCK(die_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * this must be called very early as the kernel might
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * use some instruction that are emulated on the 060
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) void __init base_trap_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) void __init trap_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) asmlinkage void set_esp0(unsigned long ssp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) current->thread.esp0 = ssp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) * Generic dumping code. Used for panic and debug.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static void dump(struct pt_regs *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) unsigned long *sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) unsigned char *tp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) pr_info("\nCURRENT PROCESS:\n\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) pr_info("COMM=%s PID=%d\n", current->comm, current->pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (current->mm) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) pr_info("TEXT=%08x-%08x DATA=%08x-%08x BSS=%08x-%08x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) (int) current->mm->start_code,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) (int) current->mm->end_code,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) (int) current->mm->start_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) (int) current->mm->end_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) (int) current->mm->end_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) (int) current->mm->brk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) pr_info("USER-STACK=%08x KERNEL-STACK=%08lx\n\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) (int) current->mm->start_stack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) (int) PAGE_SIZE+(unsigned long)current);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) show_regs(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) pr_info("\nCODE:");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) tp = ((unsigned char *) fp->pc) - 0x20;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) for (sp = (unsigned long *) tp, i = 0; (i < 0x40); i += 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if ((i % 0x10) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) pr_info("\n%08x: ", (int) (tp + i));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) pr_info("%08x ", (int) *sp++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) pr_info("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) pr_info("\nKERNEL STACK:");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) tp = ((unsigned char *) fp) - 0x40;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) for (sp = (unsigned long *) tp, i = 0; (i < 0xc0); i += 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if ((i % 0x10) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) pr_info("\n%08x: ", (int) (tp + i));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) pr_info("%08x ", (int) *sp++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) pr_info("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (STACK_MAGIC != *(unsigned long *)((unsigned long)current+PAGE_SIZE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) pr_info("(Possibly corrupted stack page??)\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) pr_info("\n\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) void die(const char *str, struct pt_regs *fp, unsigned long err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static int diecount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) oops_enter();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) console_verbose();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) spin_lock_irq(&die_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) report_bug(fp->pc, fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) pr_crit("%s: %04lx [#%d] ", str, err & 0xffff, ++diecount);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) dump(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) spin_unlock_irq(&die_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) do_exit(SIGSEGV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static int kstack_depth_to_print = 24;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) void show_stack(struct task_struct *task, unsigned long *esp, const char *loglvl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) unsigned long *stack, addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) if (esp == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) esp = (unsigned long *) &esp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) stack = esp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) printk("%sStack from %08lx:", loglvl, (unsigned long)stack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) for (i = 0; i < kstack_depth_to_print; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (((unsigned long)stack & (THREAD_SIZE - 1)) >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) THREAD_SIZE-4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if (i % 8 == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) printk("%s ", loglvl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) pr_cont(" %08lx", *stack++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) printk("%s\nCall Trace:\n", loglvl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) stack = esp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) while (((unsigned long)stack & (THREAD_SIZE - 1)) < THREAD_SIZE-4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) addr = *stack++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) * If the address is either in the text segment of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * kernel, or in the region which contains vmalloc'ed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * memory, it *may* be the address of a calling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) * routine; if so, print it so that someone tracing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) * down the cause of the crash will be able to figure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) * out the call path that was taken.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) if (check_kernel_text(addr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) if (i % 4 == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) printk("%s ", loglvl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) pr_cont(" [<%08lx>]", addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) printk("%s\n", loglvl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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