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Diffstat (limited to 'lib_m68k/extable.c')
| -rw-r--r-- | lib_m68k/extable.c | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/lib_m68k/extable.c b/lib_m68k/extable.c deleted file mode 100644 index afbc1eb..0000000 --- a/lib_m68k/extable.c +++ /dev/null @@ -1,83 +0,0 @@ -/* - * Copyright (C) 1999 Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se> - * - * (C) Copyright 2000 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ -#include <common.h> - -/* - * The exception table consists of pairs of addresses: the first is the - * address of an instruction that is allowed to fault, and the second is - * the address at which the program should continue. No registers are - * modified, so it is entirely up to the continuation code to figure out - * what to do. - * - * All the routines below use bits of fixup code that are out of line - * with the main instruction path. This means when everything is well, - * we don't even have to jump over them. Further, they do not intrude - * on our cache or tlb entries. - */ - -struct exception_table_entry { - unsigned long insn, fixup; -}; - -extern const struct exception_table_entry __start___ex_table[]; -extern const struct exception_table_entry __stop___ex_table[]; - -static inline unsigned long -search_one_table (const struct exception_table_entry *first, - const struct exception_table_entry *last, - unsigned long value) -{ - while (first <= last) { - const struct exception_table_entry *mid; - long diff; - - mid = (last - first) / 2 + first; - diff = mid->insn - value; - if (diff == 0) - return mid->fixup; - else if (diff < 0) - first = mid + 1; - else - last = mid - 1; - } - return 0; -} - -int ex_tab_message = 1; - -unsigned long search_exception_table (unsigned long addr) -{ - unsigned long ret; - - /* There is only the kernel to search. */ - ret = search_one_table (__start___ex_table, __stop___ex_table - 1, - addr); - if (ex_tab_message) - printf ("Bus Fault @ 0x%08lx, fixup 0x%08lx\n", addr, ret); - if (ret) - return ret; - - return 0; -} |