diff options
Diffstat (limited to 'arch/m32r/kernel/traps.c')
| -rw-r--r-- | arch/m32r/kernel/traps.c | 324 |
1 files changed, 0 insertions, 324 deletions
diff --git a/arch/m32r/kernel/traps.c b/arch/m32r/kernel/traps.c deleted file mode 100644 index a6f300a208bd..000000000000 --- a/arch/m32r/kernel/traps.c +++ /dev/null @@ -1,324 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * linux/arch/m32r/kernel/traps.c - * - * Copyright (C) 2001, 2002 Hirokazu Takata, Hiroyuki Kondo, - * Hitoshi Yamamoto - */ - -/* - * 'traps.c' handles hardware traps and faults after we have saved some - * state in 'entry.S'. - */ -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/kallsyms.h> -#include <linux/stddef.h> -#include <linux/ptrace.h> -#include <linux/sched/debug.h> -#include <linux/sched/task_stack.h> -#include <linux/mm.h> -#include <linux/cpu.h> - -#include <asm/page.h> -#include <asm/processor.h> - -#include <linux/uaccess.h> -#include <asm/io.h> -#include <linux/atomic.h> - -#include <asm/smp.h> - -#include <linux/module.h> - -asmlinkage void alignment_check(void); -asmlinkage void ei_handler(void); -asmlinkage void rie_handler(void); -asmlinkage void debug_trap(void); -asmlinkage void cache_flushing_handler(void); -asmlinkage void ill_trap(void); - -#ifdef CONFIG_SMP -extern void smp_reschedule_interrupt(void); -extern void smp_invalidate_interrupt(void); -extern void smp_call_function_interrupt(void); -extern void smp_ipi_timer_interrupt(void); -extern void smp_flush_cache_all_interrupt(void); -extern void smp_call_function_single_interrupt(void); - -/* - * for Boot AP function - */ -asm ( - " .section .eit_vector4,\"ax\" \n" - " .global _AP_RE \n" - " .global startup_AP \n" - "_AP_RE: \n" - " .fill 32, 4, 0 \n" - "_AP_EI: bra startup_AP \n" - " .previous \n" -); -#endif /* CONFIG_SMP */ - -extern unsigned long eit_vector[]; -#define BRA_INSN(func, entry) \ - ((unsigned long)func - (unsigned long)eit_vector - entry*4)/4 \ - + 0xff000000UL - -static void set_eit_vector_entries(void) -{ - extern void default_eit_handler(void); - extern void system_call(void); - extern void pie_handler(void); - extern void ace_handler(void); - extern void tme_handler(void); - extern void _flush_cache_copyback_all(void); - - eit_vector[0] = 0xd0c00001; /* seth r0, 0x01 */ - eit_vector[1] = BRA_INSN(default_eit_handler, 1); - eit_vector[4] = 0xd0c00010; /* seth r0, 0x10 */ - eit_vector[5] = BRA_INSN(default_eit_handler, 5); - eit_vector[8] = BRA_INSN(rie_handler, 8); - eit_vector[12] = BRA_INSN(alignment_check, 12); - eit_vector[16] = BRA_INSN(ill_trap, 16); - eit_vector[17] = BRA_INSN(debug_trap, 17); - eit_vector[18] = BRA_INSN(system_call, 18); - eit_vector[19] = BRA_INSN(ill_trap, 19); - eit_vector[20] = BRA_INSN(ill_trap, 20); - eit_vector[21] = BRA_INSN(ill_trap, 21); - eit_vector[22] = BRA_INSN(ill_trap, 22); - eit_vector[23] = BRA_INSN(ill_trap, 23); - eit_vector[24] = BRA_INSN(ill_trap, 24); - eit_vector[25] = BRA_INSN(ill_trap, 25); - eit_vector[26] = BRA_INSN(ill_trap, 26); - eit_vector[27] = BRA_INSN(ill_trap, 27); - eit_vector[28] = BRA_INSN(cache_flushing_handler, 28); - eit_vector[29] = BRA_INSN(ill_trap, 29); - eit_vector[30] = BRA_INSN(ill_trap, 30); - eit_vector[31] = BRA_INSN(ill_trap, 31); - eit_vector[32] = BRA_INSN(ei_handler, 32); - eit_vector[64] = BRA_INSN(pie_handler, 64); -#ifdef CONFIG_MMU - eit_vector[68] = BRA_INSN(ace_handler, 68); - eit_vector[72] = BRA_INSN(tme_handler, 72); -#endif /* CONFIG_MMU */ -#ifdef CONFIG_SMP - eit_vector[184] = (unsigned long)smp_reschedule_interrupt; - eit_vector[185] = (unsigned long)smp_invalidate_interrupt; - eit_vector[186] = (unsigned long)smp_call_function_interrupt; - eit_vector[187] = (unsigned long)smp_ipi_timer_interrupt; - eit_vector[188] = (unsigned long)smp_flush_cache_all_interrupt; - eit_vector[189] = 0; /* CPU_BOOT_IPI */ - eit_vector[190] = (unsigned long)smp_call_function_single_interrupt; - eit_vector[191] = 0; -#endif - _flush_cache_copyback_all(); -} - -void __init trap_init(void) -{ - set_eit_vector_entries(); - - /* - * Should be a barrier for any external CPU state. - */ - cpu_init(); -} - -static int kstack_depth_to_print = 24; - -static void show_trace(struct task_struct *task, unsigned long *stack) -{ - unsigned long addr; - - if (!stack) - stack = (unsigned long*)&stack; - - printk("Call Trace: "); - while (!kstack_end(stack)) { - addr = *stack++; - if (__kernel_text_address(addr)) - printk("[<%08lx>] %pSR\n", addr, (void *)addr); - } - printk("\n"); -} - -void show_stack(struct task_struct *task, unsigned long *sp) -{ - unsigned long *stack; - int i; - - /* - * debugging aid: "show_stack(NULL);" prints the - * back trace for this cpu. - */ - - if(sp==NULL) { - if (task) - sp = (unsigned long *)task->thread.sp; - else - sp=(unsigned long*)&sp; - } - - stack = sp; - for(i=0; i < kstack_depth_to_print; i++) { - if (kstack_end(stack)) - break; - if (i && ((i % 4) == 0)) - printk("\n "); - printk("%08lx ", *stack++); - } - printk("\n"); - show_trace(task, sp); -} - -static void show_registers(struct pt_regs *regs) -{ - int i = 0; - int in_kernel = 1; - unsigned long sp; - - printk("CPU: %d\n", smp_processor_id()); - show_regs(regs); - - sp = (unsigned long) (1+regs); - if (user_mode(regs)) { - in_kernel = 0; - sp = regs->spu; - printk("SPU: %08lx\n", sp); - } else { - printk("SPI: %08lx\n", sp); - } - printk("Process %s (pid: %d, process nr: %d, stackpage=%08lx)", - current->comm, task_pid_nr(current), 0xffff & i, 4096+(unsigned long)current); - - /* - * When in-kernel, we also print out the stack and code at the - * time of the fault.. - */ - if (in_kernel) { - printk("\nStack: "); - show_stack(current, (unsigned long*) sp); - - printk("\nCode: "); - if (regs->bpc < PAGE_OFFSET) - goto bad; - - for(i=0;i<20;i++) { - unsigned char c; - if (__get_user(c, &((unsigned char*)regs->bpc)[i])) { -bad: - printk(" Bad PC value."); - break; - } - printk("%02x ", c); - } - } - printk("\n"); -} - -static DEFINE_SPINLOCK(die_lock); - -void die(const char * str, struct pt_regs * regs, long err) -{ - console_verbose(); - spin_lock_irq(&die_lock); - bust_spinlocks(1); - printk("%s: %04lx\n", str, err & 0xffff); - show_registers(regs); - bust_spinlocks(0); - spin_unlock_irq(&die_lock); - do_exit(SIGSEGV); -} - -static __inline__ void die_if_kernel(const char * str, - struct pt_regs * regs, long err) -{ - if (!user_mode(regs)) - die(str, regs, err); -} - -static __inline__ void do_trap(int trapnr, int signr, const char * str, - struct pt_regs * regs, long error_code, siginfo_t *info) -{ - if (user_mode(regs)) { - /* trap_signal */ - struct task_struct *tsk = current; - tsk->thread.error_code = error_code; - tsk->thread.trap_no = trapnr; - if (info) - force_sig_info(signr, info, tsk); - else - force_sig(signr, tsk); - return; - } else { - /* kernel_trap */ - if (!fixup_exception(regs)) - die(str, regs, error_code); - return; - } -} - -#define DO_ERROR(trapnr, signr, str, name) \ -asmlinkage void do_##name(struct pt_regs * regs, long error_code) \ -{ \ - do_trap(trapnr, signr, NULL, regs, error_code, NULL); \ -} - -#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr) \ -asmlinkage void do_##name(struct pt_regs * regs, long error_code) \ -{ \ - siginfo_t info; \ - info.si_signo = signr; \ - info.si_errno = 0; \ - info.si_code = sicode; \ - info.si_addr = (void __user *)siaddr; \ - do_trap(trapnr, signr, str, regs, error_code, &info); \ -} - -DO_ERROR( 1, SIGTRAP, "debug trap", debug_trap) -DO_ERROR_INFO(0x20, SIGILL, "reserved instruction ", rie_handler, ILL_ILLOPC, regs->bpc) -DO_ERROR_INFO(0x100, SIGILL, "privileged instruction", pie_handler, ILL_PRVOPC, regs->bpc) -DO_ERROR_INFO(-1, SIGILL, "illegal trap", ill_trap, ILL_ILLTRP, regs->bpc) - -extern int handle_unaligned_access(unsigned long, struct pt_regs *); - -/* This code taken from arch/sh/kernel/traps.c */ -asmlinkage void do_alignment_check(struct pt_regs *regs, long error_code) -{ - mm_segment_t oldfs; - unsigned long insn; - int tmp; - - oldfs = get_fs(); - - if (user_mode(regs)) { - local_irq_enable(); - current->thread.error_code = error_code; - current->thread.trap_no = 0x17; - - set_fs(USER_DS); - if (copy_from_user(&insn, (void *)regs->bpc, 4)) { - set_fs(oldfs); - goto uspace_segv; - } - tmp = handle_unaligned_access(insn, regs); - set_fs(oldfs); - - if (!tmp) - return; - - uspace_segv: - printk(KERN_NOTICE "Killing process \"%s\" due to unaligned " - "access\n", current->comm); - force_sig(SIGSEGV, current); - } else { - set_fs(KERNEL_DS); - if (copy_from_user(&insn, (void *)regs->bpc, 4)) { - set_fs(oldfs); - die("insn faulting in do_address_error", regs, 0); - } - handle_unaligned_access(insn, regs); - set_fs(oldfs); - } -} |