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/*
* linux/arch/ppc/kernel/traps.c
*
* Copyright (C) 1995 Gary Thomas
* Adapted for PowerPC by Gary Thomas
*/
/*
* This file handles the architecture-dependent parts of hardware exceptions
*/
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/malloc.h>
#include <linux/ldt.h>
#include <linux/user.h>
#include <linux/a.out.h>
#include <asm/pgtable.h>
#include <asm/segment.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/ppc_machine.h>
/*
* Trap & Exception support
*/
void
trap_init(void)
{
}
void
_exception(int signr, struct pt_regs *regs)
{
/* dump_regs(regs);*/
force_sig(signr, current);
if (!user_mode(regs))
{
printk("Failure in kernel at PC: %x, MSR: %x\n", regs->nip, regs->msr);
while (1) ;
}
}
MachineCheckException(struct pt_regs *regs)
{
/* printk("Machine check at PC: %x[%x], SR: %x\n", regs->nip, va_to_phys(regs->nip), regs->msr);*/
_exception(SIGSEGV, regs);
}
ProgramCheckException(struct pt_regs *regs)
{
/* printk("Program check at PC: %x[%x], SR: %x\n", regs->nip, va_to_phys(regs->nip), regs->msr);*/
if (current->flags & PF_PTRACED)
{
_exception(SIGTRAP, regs);
} else
{
_exception(SIGILL, regs);
}
}
SingleStepException(struct pt_regs *regs)
{
/* printk("Single step at PC: %x[%x], SR: %x\n", regs->nip, va_to_phys(regs->nip), regs->msr);*/
regs->msr &= ~MSR_SE; /* Turn off 'trace' bit */
_exception(SIGTRAP, regs);
}
FloatingPointCheckException(struct pt_regs *regs)
{
/* printk("Floating point check at PC: %x[%x], SR: %x\n", regs->nip, va_to_phys(regs->nip), regs->msr);*/
_exception(SIGFPE, regs);
}
AlignmentException(struct pt_regs *regs)
{
/* printk("Alignment error at PC: %x, SR: %x\n", regs->nip, regs->msr);
dump_regs(regs);
printk("Alignment error at PC: %x[%x], SR: %x\n", regs->nip, va_to_phys(regs->nip), regs->msr);*/
_exception(SIGBUS, regs);
}
bad_stack(struct pt_regs *regs)
{
/* printk("Kernel stack overflow at PC: %x[%x], SR: %x\n", regs->nip, va_to_phys(regs->nip), regs->msr);
dump_regs(regs);*/
while (1) ;
}
dump_regs(struct pt_regs *regs)
{
int i;
printk("NIP: %08X, MSR: %08X, XER: %08X, LR: %08X, FRAME: %08X\n", regs->nip, regs->msr, regs->xer, regs->link, regs);
#if 0
printk("HASH = %08X/%08X, MISS = %08X/%08X, CMP = %08X/%08X\n", regs->hash1, regs->hash2, regs->imiss, regs->dmiss, regs->icmp, regs->dcmp);
#endif
printk("TASK = %x[%d] '%s'\n", current, current->pid, current->comm);
for (i = 0; i < 32; i++)
{
if ((i % 8) == 0)
{
printk("GPR%02d: ", i);
}
printk("%08X ", regs->gpr[i]);
if ((i % 8) == 7)
{
printk("\n");
}
}
#if 0
if (regs->nip >= 0x1000)
dump_buf(regs->nip-32, 64);
dump_buf((regs->nip&0x0FFFFFFF)|KERNELBASE, 32);
#endif
}
trace_syscall(struct pt_regs *regs)
{
static int count;
printk("Task: %08X(%d), PC: %08X/%08X, Syscall: %3d, Result: %s%d\n", current, current->pid, regs->nip, regs->link, regs->gpr[0], regs->ccr&0x10000000?"Error=":"", regs->gpr[3]);
if (++count == 20)
{
count = 0;
}
}
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