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authorRalf Baechle <ralf@linux-mips.org>1999-08-18 23:37:42 +0000
committerRalf Baechle <ralf@linux-mips.org>1999-08-18 23:37:42 +0000
commit794ff4dc959a8dfef4f704ef6a5bb7334e421623 (patch)
tree9ea4d7f31e69420a29819a7e4c88e4097aa4380f /arch/mips64/mm/extable.c
parent8b92ed51419c907aa453c063b0afaefaef268c02 (diff)
- Drop support for 32/32 fp register model
- Fix siginfo structure definition - Ptrace fixes, one of them was an uninitialized pointer. - Header file fixes. - Fixes to linker scripts required for new binutils. - MIPS64. Chainsaw edition. Btw, Harald, why does the kernel no longer compile ...
Diffstat (limited to 'arch/mips64/mm/extable.c')
-rw-r--r--arch/mips64/mm/extable.c60
1 files changed, 60 insertions, 0 deletions
diff --git a/arch/mips64/mm/extable.c b/arch/mips64/mm/extable.c
new file mode 100644
index 000000000..7a7ab27ea
--- /dev/null
+++ b/arch/mips64/mm/extable.c
@@ -0,0 +1,60 @@
+/* $Id$
+ *
+ * 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.
+ *
+ * Copyright (C) 1994, 1995, 1996, 1999 by Ralf Baechle
+ * Copyright (C) 1999 by Silicon Graphics
+ */
+#include <linux/config.h>
+#include <linux/module.h>
+#include <asm/uaccess.h>
+
+extern const struct exception_table_entry __start___ex_table[];
+extern const struct exception_table_entry __stop___ex_table[];
+
+static inline unsigned
+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->nextinsn;
+ else if (diff < 0)
+ first = mid+1;
+ else
+ last = mid-1;
+ }
+ return 0;
+}
+
+unsigned long
+search_exception_table(unsigned long addr)
+{
+ unsigned long ret;
+
+#ifndef CONFIG_MODULES
+ /* There is only the kernel to search. */
+ ret = search_one_table(__start___ex_table, __stop___ex_table-1, addr);
+ if (ret) return ret;
+#else
+ /* The kernel is the last "module" -- no need to treat it special. */
+ struct module *mp;
+ for (mp = module_list; mp != NULL; mp = mp->next) {
+ if (mp->ex_table_start == NULL)
+ continue;
+ ret = search_one_table(mp->ex_table_start,
+ mp->ex_table_end - 1, addr);
+ if (ret) return ret;
+ }
+#endif
+
+ return 0;
+}