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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/m68knommu/kernel/traps.c | |
download | kernel_samsung_smdk4412-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip kernel_samsung_smdk4412-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz kernel_samsung_smdk4412-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/m68knommu/kernel/traps.c')
-rw-r--r-- | arch/m68knommu/kernel/traps.c | 320 |
1 files changed, 320 insertions, 0 deletions
diff --git a/arch/m68knommu/kernel/traps.c b/arch/m68knommu/kernel/traps.c new file mode 100644 index 0000000..ad7dc63 --- /dev/null +++ b/arch/m68knommu/kernel/traps.c @@ -0,0 +1,320 @@ +/* + * linux/arch/m68knommu/kernel/traps.c + * + * Copyright (C) 1993, 1994 by Hamish Macdonald + * + * 68040 fixes by Michael Rausch + * 68040 fixes by Martin Apel + * 68060 fixes by Roman Hodek + * 68060 fixes by Jesper Skov + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive + * for more details. + */ + +/* + * Sets up all exception vectors + */ +#include <linux/config.h> +#include <linux/sched.h> +#include <linux/signal.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/types.h> +#include <linux/a.out.h> +#include <linux/user.h> +#include <linux/string.h> +#include <linux/linkage.h> +#include <linux/init.h> +#include <linux/ptrace.h> + +#include <asm/setup.h> +#include <asm/fpu.h> +#include <asm/system.h> +#include <asm/uaccess.h> +#include <asm/traps.h> +#include <asm/pgtable.h> +#include <asm/machdep.h> +#include <asm/siginfo.h> + +static char *vec_names[] = { + "RESET SP", "RESET PC", "BUS ERROR", "ADDRESS ERROR", + "ILLEGAL INSTRUCTION", "ZERO DIVIDE", "CHK", "TRAPcc", + "PRIVILEGE VIOLATION", "TRACE", "LINE 1010", "LINE 1111", + "UNASSIGNED RESERVED 12", "COPROCESSOR PROTOCOL VIOLATION", + "FORMAT ERROR", "UNINITIALIZED INTERRUPT", + "UNASSIGNED RESERVED 16", "UNASSIGNED RESERVED 17", + "UNASSIGNED RESERVED 18", "UNASSIGNED RESERVED 19", + "UNASSIGNED RESERVED 20", "UNASSIGNED RESERVED 21", + "UNASSIGNED RESERVED 22", "UNASSIGNED RESERVED 23", + "SPURIOUS INTERRUPT", "LEVEL 1 INT", "LEVEL 2 INT", "LEVEL 3 INT", + "LEVEL 4 INT", "LEVEL 5 INT", "LEVEL 6 INT", "LEVEL 7 INT", + "SYSCALL", "TRAP #1", "TRAP #2", "TRAP #3", + "TRAP #4", "TRAP #5", "TRAP #6", "TRAP #7", + "TRAP #8", "TRAP #9", "TRAP #10", "TRAP #11", + "TRAP #12", "TRAP #13", "TRAP #14", "TRAP #15", + "FPCP BSUN", "FPCP INEXACT", "FPCP DIV BY 0", "FPCP UNDERFLOW", + "FPCP OPERAND ERROR", "FPCP OVERFLOW", "FPCP SNAN", + "FPCP UNSUPPORTED OPERATION", + "MMU CONFIGURATION ERROR" +}; + +void __init trap_init(void) +{ + if (mach_trap_init) + mach_trap_init(); +} + +void die_if_kernel(char *str, struct pt_regs *fp, int nr) +{ + if (!(fp->sr & PS_S)) + return; + + console_verbose(); + printk(KERN_EMERG "%s: %08x\n",str,nr); + printk(KERN_EMERG "PC: [<%08lx>]\nSR: %04x SP: %p a2: %08lx\n", + fp->pc, fp->sr, fp, fp->a2); + printk(KERN_EMERG "d0: %08lx d1: %08lx d2: %08lx d3: %08lx\n", + fp->d0, fp->d1, fp->d2, fp->d3); + printk(KERN_EMERG "d4: %08lx d5: %08lx a0: %08lx a1: %08lx\n", + fp->d4, fp->d5, fp->a0, fp->a1); + + printk(KERN_EMERG "Process %s (pid: %d, stackpage=%08lx)\n", + current->comm, current->pid, PAGE_SIZE+(unsigned long)current); + show_stack(NULL, (unsigned long *)fp); + do_exit(SIGSEGV); +} + +asmlinkage void buserr_c(struct frame *fp) +{ + /* Only set esp0 if coming from user mode */ + if (user_mode(&fp->ptregs)) + current->thread.esp0 = (unsigned long) fp; + +#if DEBUG + printk (KERN_DEBUG "*** Bus Error *** Format is %x\n", fp->ptregs.format); +#endif + + die_if_kernel("bad frame format",&fp->ptregs,0); +#if DEBUG + printk(KERN_DEBUG "Unknown SIGSEGV - 4\n"); +#endif + force_sig(SIGSEGV, current); +} + + +int kstack_depth_to_print = 48; + +void show_stack(struct task_struct *task, unsigned long *esp) +{ + unsigned long *stack, *endstack, addr; + extern char _start, _etext; + int i; + + if (esp == NULL) + esp = (unsigned long *) &esp; + + stack = esp; + addr = (unsigned long) esp; + endstack = (unsigned long *) PAGE_ALIGN(addr); + + printk(KERN_EMERG "Stack from %08lx:", (unsigned long)stack); + for (i = 0; i < kstack_depth_to_print; i++) { + if (stack + 1 > endstack) + break; + if (i % 8 == 0) + printk(KERN_EMERG "\n "); + printk(KERN_EMERG " %08lx", *stack++); + } + + printk(KERN_EMERG "\nCall Trace:"); + i = 0; + while (stack + 1 <= endstack) { + addr = *stack++; + /* + * If the address is either in the text segment of the + * kernel, or in the region which contains vmalloc'ed + * memory, it *may* be the address of a calling + * routine; if so, print it so that someone tracing + * down the cause of the crash will be able to figure + * out the call path that was taken. + */ + if (((addr >= (unsigned long) &_start) && + (addr <= (unsigned long) &_etext))) { + if (i % 4 == 0) + printk(KERN_EMERG "\n "); + printk(KERN_EMERG " [<%08lx>]", addr); + i++; + } + } + printk(KERN_EMERG "\n"); +} + +void bad_super_trap(struct frame *fp) +{ + console_verbose(); + if (fp->ptregs.vector < 4*sizeof(vec_names)/sizeof(vec_names[0])) + printk (KERN_WARNING "*** %s *** FORMAT=%X\n", + vec_names[(fp->ptregs.vector) >> 2], + fp->ptregs.format); + else + printk (KERN_WARNING "*** Exception %d *** FORMAT=%X\n", + (fp->ptregs.vector) >> 2, + fp->ptregs.format); + printk (KERN_WARNING "Current process id is %d\n", current->pid); + die_if_kernel("BAD KERNEL TRAP", &fp->ptregs, 0); +} + +asmlinkage void trap_c(struct frame *fp) +{ + int sig; + siginfo_t info; + + if (fp->ptregs.sr & PS_S) { + if ((fp->ptregs.vector >> 2) == VEC_TRACE) { + /* traced a trapping instruction */ + current->ptrace |= PT_DTRACE; + } else + bad_super_trap(fp); + return; + } + + /* send the appropriate signal to the user program */ + switch ((fp->ptregs.vector) >> 2) { + case VEC_ADDRERR: + info.si_code = BUS_ADRALN; + sig = SIGBUS; + break; + case VEC_ILLEGAL: + case VEC_LINE10: + case VEC_LINE11: + info.si_code = ILL_ILLOPC; + sig = SIGILL; + break; + case VEC_PRIV: + info.si_code = ILL_PRVOPC; + sig = SIGILL; + break; + case VEC_COPROC: + info.si_code = ILL_COPROC; + sig = SIGILL; + break; + case VEC_TRAP1: /* gdbserver breakpoint */ + fp->ptregs.pc -= 2; + info.si_code = TRAP_TRACE; + sig = SIGTRAP; + break; + case VEC_TRAP2: + case VEC_TRAP3: + case VEC_TRAP4: + case VEC_TRAP5: + case VEC_TRAP6: + case VEC_TRAP7: + case VEC_TRAP8: + case VEC_TRAP9: + case VEC_TRAP10: + case VEC_TRAP11: + case VEC_TRAP12: + case VEC_TRAP13: + case VEC_TRAP14: + info.si_code = ILL_ILLTRP; + sig = SIGILL; + break; + case VEC_FPBRUC: + case VEC_FPOE: + case VEC_FPNAN: + info.si_code = FPE_FLTINV; + sig = SIGFPE; + break; + case VEC_FPIR: + info.si_code = FPE_FLTRES; + sig = SIGFPE; + break; + case VEC_FPDIVZ: + info.si_code = FPE_FLTDIV; + sig = SIGFPE; + break; + case VEC_FPUNDER: + info.si_code = FPE_FLTUND; + sig = SIGFPE; + break; + case VEC_FPOVER: + info.si_code = FPE_FLTOVF; + sig = SIGFPE; + break; + case VEC_ZERODIV: + info.si_code = FPE_INTDIV; + sig = SIGFPE; + break; + case VEC_CHK: + case VEC_TRAP: + info.si_code = FPE_INTOVF; + sig = SIGFPE; + break; + case VEC_TRACE: /* ptrace single step */ + info.si_code = TRAP_TRACE; + sig = SIGTRAP; + break; + case VEC_TRAP15: /* breakpoint */ + info.si_code = TRAP_BRKPT; + sig = SIGTRAP; + break; + default: + info.si_code = ILL_ILLOPC; + sig = SIGILL; + break; + } + info.si_signo = sig; + info.si_errno = 0; + switch (fp->ptregs.format) { + default: + info.si_addr = (void *) fp->ptregs.pc; + break; + case 2: + info.si_addr = (void *) fp->un.fmt2.iaddr; + break; + case 7: + info.si_addr = (void *) fp->un.fmt7.effaddr; + break; + case 9: + info.si_addr = (void *) fp->un.fmt9.iaddr; + break; + case 10: + info.si_addr = (void *) fp->un.fmta.daddr; + break; + case 11: + info.si_addr = (void *) fp->un.fmtb.daddr; + break; + } + force_sig_info (sig, &info, current); +} + +asmlinkage void set_esp0(unsigned long ssp) +{ + current->thread.esp0 = ssp; +} + + +/* + * The architecture-independent backtrace generator + */ +void dump_stack(void) +{ + unsigned long stack; + + show_stack(current, &stack); +} + +#ifdef CONFIG_M68KFPU_EMU +asmlinkage void fpemu_signal(int signal, int code, void *addr) +{ + siginfo_t info; + + info.si_signo = signal; + info.si_errno = 0; + info.si_code = code; + info.si_addr = addr; + force_sig_info(signal, &info, current); +} +#endif |