提交 018b8d12 编写于 作者: D David Howells 提交者: Linus Torvalds

[PATCH] frv: support module exception tables

Fix the exception table handling so that modules exceptions are dealt with.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
上级 40234401
......@@ -43,7 +43,7 @@ static inline unsigned long search_one_table(const struct exception_table_entry
*/
unsigned long search_exception_table(unsigned long pc)
{
unsigned long ret = 0;
const struct exception_table_entry *extab;
/* determine if the fault lay during a memcpy_user or a memset_user */
if (__frame->lr == (unsigned long) &__memset_user_error_lr &&
......@@ -55,7 +55,8 @@ unsigned long search_exception_table(unsigned long pc)
*/
return (unsigned long) &__memset_user_error_handler;
}
else if (__frame->lr == (unsigned long) &__memcpy_user_error_lr &&
if (__frame->lr == (unsigned long) &__memcpy_user_error_lr &&
(unsigned long) &memcpy <= pc && pc < (unsigned long) &__memcpy_end
) {
/* the fault occurred in a protected memset
......@@ -65,27 +66,10 @@ unsigned long search_exception_table(unsigned long pc)
return (unsigned long) &__memcpy_user_error_handler;
}
#ifndef CONFIG_MODULES
/* there is only the kernel to search. */
ret = search_one_table(__start___ex_table, __stop___ex_table - 1, pc);
return ret;
#else
/* the kernel is the last "module" -- no need to treat it special */
unsigned long flags;
struct module *mp;
spin_lock_irqsave(&modlist_lock, flags);
extab = search_exception_tables(pc);
if (extab)
return extab->fixup;
for (mp = module_list; mp != NULL; mp = mp->next) {
if (mp->ex_table_start == NULL || !(mp->flags & (MOD_RUNNING | MOD_INITIALIZING)))
continue;
ret = search_one_table(mp->ex_table_start, mp->ex_table_end - 1, pc);
if (ret)
break;
}
return 0;
spin_unlock_irqrestore(&modlist_lock, flags);
return ret;
#endif
} /* end search_exception_table() */
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