traps.c (334d0dd8b660557608142f0f77abc6812b48f08b) traps.c (1eeb66a1bb973534dc3d064920a5ca683823372e)
1/*
2 * linux/arch/arm/kernel/traps.c
3 *
4 * Copyright (C) 1995-2002 Russell King
5 * Fragments that appear the same as linux/arch/i386/kernel/traps.c (C) Linus Torvalds
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as

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240 spin_unlock_irq(&die_lock);
241
242 if (panic_on_oops)
243 panic("Fatal exception");
244
245 do_exit(SIGSEGV);
246}
247
1/*
2 * linux/arch/arm/kernel/traps.c
3 *
4 * Copyright (C) 1995-2002 Russell King
5 * Fragments that appear the same as linux/arch/i386/kernel/traps.c (C) Linus Torvalds
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as

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240 spin_unlock_irq(&die_lock);
241
242 if (panic_on_oops)
243 panic("Fatal exception");
244
245 do_exit(SIGSEGV);
246}
247
248void notify_die(const char *str, struct pt_regs *regs, struct siginfo *info,
249 unsigned long err, unsigned long trap)
248void arm_notify_die(const char *str, struct pt_regs *regs,
249 struct siginfo *info, unsigned long err, unsigned long trap)
250{
251 if (user_mode(regs)) {
252 current->thread.error_code = err;
253 current->thread.trap_no = trap;
254
255 force_sig_info(info->si_signo, info, current);
256 } else {
257 die(str, regs, err);

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325 }
326#endif
327
328 info.si_signo = SIGILL;
329 info.si_errno = 0;
330 info.si_code = ILL_ILLOPC;
331 info.si_addr = pc;
332
250{
251 if (user_mode(regs)) {
252 current->thread.error_code = err;
253 current->thread.trap_no = trap;
254
255 force_sig_info(info->si_signo, info, current);
256 } else {
257 die(str, regs, err);

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325 }
326#endif
327
328 info.si_signo = SIGILL;
329 info.si_errno = 0;
330 info.si_code = ILL_ILLOPC;
331 info.si_addr = pc;
332
333 notify_die("Oops - undefined instruction", regs, &info, 0, 6);
333 arm_notify_die("Oops - undefined instruction", regs, &info, 0, 6);
334}
335
336asmlinkage void do_unexp_fiq (struct pt_regs *regs)
337{
338#ifndef CONFIG_IGNORE_FIQ
339 printk("Hmm. Unexpected FIQ received, but trying to continue\n");
340 printk("You may have a hardware problem...\n");
341#endif

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379#endif
380
381 info.si_signo = SIGILL;
382 info.si_errno = 0;
383 info.si_code = ILL_ILLTRP;
384 info.si_addr = (void __user *)instruction_pointer(regs) -
385 (thumb_mode(regs) ? 2 : 4);
386
334}
335
336asmlinkage void do_unexp_fiq (struct pt_regs *regs)
337{
338#ifndef CONFIG_IGNORE_FIQ
339 printk("Hmm. Unexpected FIQ received, but trying to continue\n");
340 printk("You may have a hardware problem...\n");
341#endif

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379#endif
380
381 info.si_signo = SIGILL;
382 info.si_errno = 0;
383 info.si_code = ILL_ILLTRP;
384 info.si_addr = (void __user *)instruction_pointer(regs) -
385 (thumb_mode(regs) ? 2 : 4);
386
387 notify_die("Oops - bad syscall", regs, &info, n, 0);
387 arm_notify_die("Oops - bad syscall", regs, &info, n, 0);
388
389 return regs->ARM_r0;
390}
391
392static inline void
393do_cache_op(unsigned long start, unsigned long end, int flags)
394{
395 struct vm_area_struct *vma;

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423
424 switch (no & 0xffff) {
425 case 0: /* branch through 0 */
426 info.si_signo = SIGSEGV;
427 info.si_errno = 0;
428 info.si_code = SEGV_MAPERR;
429 info.si_addr = NULL;
430
388
389 return regs->ARM_r0;
390}
391
392static inline void
393do_cache_op(unsigned long start, unsigned long end, int flags)
394{
395 struct vm_area_struct *vma;

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423
424 switch (no & 0xffff) {
425 case 0: /* branch through 0 */
426 info.si_signo = SIGSEGV;
427 info.si_errno = 0;
428 info.si_code = SEGV_MAPERR;
429 info.si_addr = NULL;
430
431 notify_die("branch through zero", regs, &info, 0, 0);
431 arm_notify_die("branch through zero", regs, &info, 0, 0);
432 return 0;
433
434 case NR(breakpoint): /* SWI BREAK_POINT */
435 regs->ARM_pc -= thumb_mode(regs) ? 2 : 4;
436 ptrace_break(current, regs);
437 return regs->ARM_r0;
438
439 /*

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559 }
560#endif
561 info.si_signo = SIGILL;
562 info.si_errno = 0;
563 info.si_code = ILL_ILLTRP;
564 info.si_addr = (void __user *)instruction_pointer(regs) -
565 (thumb_mode(regs) ? 2 : 4);
566
432 return 0;
433
434 case NR(breakpoint): /* SWI BREAK_POINT */
435 regs->ARM_pc -= thumb_mode(regs) ? 2 : 4;
436 ptrace_break(current, regs);
437 return regs->ARM_r0;
438
439 /*

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559 }
560#endif
561 info.si_signo = SIGILL;
562 info.si_errno = 0;
563 info.si_code = ILL_ILLTRP;
564 info.si_addr = (void __user *)instruction_pointer(regs) -
565 (thumb_mode(regs) ? 2 : 4);
566
567 notify_die("Oops - bad syscall(2)", regs, &info, no, 0);
567 arm_notify_die("Oops - bad syscall(2)", regs, &info, no, 0);
568 return 0;
569}
570
571#ifdef CONFIG_TLS_REG_EMUL
572
573/*
574 * We might be running on an ARMv6+ processor which should have the TLS
575 * register but for some reason we can't use it, or maybe an SMP system

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633 }
634#endif
635
636 info.si_signo = SIGILL;
637 info.si_errno = 0;
638 info.si_code = ILL_ILLOPC;
639 info.si_addr = (void __user *)addr;
640
568 return 0;
569}
570
571#ifdef CONFIG_TLS_REG_EMUL
572
573/*
574 * We might be running on an ARMv6+ processor which should have the TLS
575 * register but for some reason we can't use it, or maybe an SMP system

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633 }
634#endif
635
636 info.si_signo = SIGILL;
637 info.si_errno = 0;
638 info.si_code = ILL_ILLOPC;
639 info.si_addr = (void __user *)addr;
640
641 notify_die("unknown data abort code", regs, &info, instr, 0);
641 arm_notify_die("unknown data abort code", regs, &info, instr, 0);
642}
643
644void __attribute__((noreturn)) __bug(const char *file, int line)
645{
646 printk(KERN_CRIT"kernel BUG at %s:%d!\n", file, line);
647 *(int *)0 = 0;
648
649 /* Avoid "noreturn function does return" */

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643
644void __attribute__((noreturn)) __bug(const char *file, int line)
645{
646 printk(KERN_CRIT"kernel BUG at %s:%d!\n", file, line);
647 *(int *)0 = 0;
648
649 /* Avoid "noreturn function does return" */

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