URL
https://opencores.org/ocsvn/or1k/or1k/trunk
Subversion Repositories or1k
[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [kernel/] [panic.c] - Rev 1275
Go to most recent revision | Compare with Previous | Blame | View Log
/* * linux/kernel/panic.c * * Copyright (C) 1991, 1992 Linus Torvalds */ /* * This function is used through-out the kernel (including mm and fs) * to indicate a major problem. */ #include <linux/config.h> #include <linux/sched.h> #include <linux/delay.h> #include <linux/reboot.h> #include <linux/notifier.h> #include <linux/init.h> #include <linux/sysrq.h> #include <linux/interrupt.h> #include <linux/console.h> asmlinkage void sys_sync(void); /* it's really int */ int panic_timeout; struct notifier_block *panic_notifier_list; static int __init panic_setup(char *str) { panic_timeout = simple_strtoul(str, NULL, 0); return 1; } __setup("panic=", panic_setup); int machine_paniced; /** * panic - halt the system * @fmt: The text string to print * * Display a message, then perform cleanups. Functions in the panic * notifier list are called after the filesystem cache is flushed (when possible). * * This function never returns. */ NORET_TYPE void panic(const char * fmt, ...) { static char buf[1024]; va_list args; #if defined(CONFIG_ARCH_S390) unsigned long caller = (unsigned long) __builtin_return_address(0); #endif #ifdef CONFIG_VT disable_console_blank(); #endif machine_paniced = 1; bust_spinlocks(1); va_start(args, fmt); vsprintf(buf, fmt, args); va_end(args); printk(KERN_EMERG "Kernel panic: %s\n",buf); if (in_interrupt()) printk(KERN_EMERG "In interrupt handler - not syncing\n"); else if (!current->pid) printk(KERN_EMERG "In idle task - not syncing\n"); else sys_sync(); bust_spinlocks(0); #ifdef CONFIG_SMP smp_send_stop(); #endif notifier_call_chain(&panic_notifier_list, 0, NULL); if (panic_timeout > 0) { /* * Delay timeout seconds before rebooting the machine. * We can't use the "normal" timers since we just panicked.. */ printk(KERN_EMERG "Rebooting in %d seconds..",panic_timeout); mdelay(panic_timeout*1000); /* * Should we run the reboot notifier. For the moment Im * choosing not too. It might crash, be corrupt or do * more harm than good for other reasons. */ machine_restart(NULL); } #ifdef __sparc__ { extern int stop_a_enabled; /* Make sure the user can actually press L1-A */ stop_a_enabled = 1; printk("Press L1-A to return to the boot prom\n"); } #endif #if defined(CONFIG_ARCH_S390) disabled_wait(caller); #endif sti(); for(;;) { #if defined(CONFIG_X86) && defined(CONFIG_VT) extern void panic_blink(void); panic_blink(); #endif CHECK_EMERGENCY_SYNC } } /** * print_tainted - return a string to represent the kernel taint state. * * The string is overwritten by the next call to print_taint(). */ const char *print_tainted() { static char buf[20]; if (tainted) { snprintf(buf, sizeof(buf), "Tainted: %c%c", tainted & 1 ? 'P' : 'G', tainted & 2 ? 'F' : ' '); } else snprintf(buf, sizeof(buf), "Not tainted"); return(buf); } int tainted = 0; /* * A BUG() call in an inline function in a header should be avoided, * because it can seriously bloat the kernel. So here we have * helper functions. * We lose the BUG()-time file-and-line info this way, but it's * usually not very useful from an inline anyway. The backtrace * tells us what we want to know. */ void __out_of_line_bug(int line) { printk("kernel BUG in header file at line %d\n", line); BUG(); /* Satisfy __attribute__((noreturn)) */ for ( ; ; ) ; }
Go to most recent revision | Compare with Previous | Blame | View Log