/* * Kernel exception handling table support. Derived from arch/alpha/mm/extable.c. * * Copyright (C) 1998, 1999, 2001-2002 Hewlett-Packard Co * David Mosberger-Tang <davidm@hpl.hp.com> */ #include <linux/config.h> #include <asm/uaccess.h> #include <asm/module.h> const struct exception_table_entry * search_extable (const struct exception_table_entry *first, const struct exception_table_entry *last, unsigned long ip) { const struct exception_table_entry *mid; unsigned long mid_ip; long diff; while (first <= last) { mid = &first[(last - first)/2]; mid_ip = (u64) &mid->addr + mid->addr; diff = mid_ip - ip; if (diff == 0) return mid; else if (diff < 0) first = mid + 1; else last = mid - 1; } return 0; } void handle_exception (struct pt_regs *regs, const struct exception_table_entry *e) { long fix = (u64) &e->cont + e->cont; regs->r8 = -EFAULT; if (fix & 4) regs->r9 = 0; regs->cr_iip = fix & ~0xf; ia64_psr(regs)->ri = fix & 0x3; /* set continuation slot number */ }