unsigned long size;
struct unwind_table *link;
const char *name;
-} root_table, *last_table;
+} root_table;
struct unwind_item {
enum item_location {
__start_unwind, __end_unwind - __start_unwind);
}
+#ifdef CONFIG_MODULES
+
+static struct unwind_table *last_table;
+
/* Must be called with module_mutex held. */
void *unwind_add_table(struct module *module,
const void *table_start,
kfree(table);
}
+#endif /* CONFIG_MODULES */
+
static uleb128_t get_uleb128(const u8 **pcur, const u8 *end)
{
const u8 *cur = *pcur;
#define FRAME_REG(r, t) (((t *)frame)[reg_info[r].offs])
const u32 *fde = NULL, *cie = NULL;
const u8 *ptr = NULL, *end = NULL;
+ unsigned long pc = UNW_PC(frame) - frame->call_frame;
unsigned long startLoc = 0, endLoc = 0, cfa;
unsigned i;
signed ptrType = -1;
if (UNW_PC(frame) == 0)
return -EINVAL;
- if ((table = find_table(UNW_PC(frame))) != NULL
+ if ((table = find_table(pc)) != NULL
&& !(table->size & (sizeof(*fde) - 1))) {
unsigned long tableSize = table->size;
ptrType & DW_EH_PE_indirect
? ptrType
: ptrType & (DW_EH_PE_FORM|DW_EH_PE_signed));
- if (UNW_PC(frame) >= startLoc && UNW_PC(frame) < endLoc)
+ if (pc >= startLoc && pc < endLoc)
break;
cie = NULL;
}
state.cieEnd = ptr; /* keep here temporarily */
ptr = (const u8 *)(cie + 2);
end = (const u8 *)(cie + 1) + *cie;
+ frame->call_frame = 1;
if ((state.version = *ptr) != 1)
cie = NULL; /* unsupported version */
else if (*++ptr) {
/* check if augmentation size is first (and thus present) */
if (*ptr == 'z') {
- /* check for ignorable (or already handled)
- * nul-terminated augmentation string */
- while (++ptr < end && *ptr)
- if (strchr("LPR", *ptr) == NULL)
+ while (++ptr < end && *ptr) {
+ switch(*ptr) {
+ /* check for ignorable (or already handled)
+ * nul-terminated augmentation string */
+ case 'L':
+ case 'P':
+ case 'R':
+ continue;
+ case 'S':
+ frame->call_frame = 0;
+ continue;
+ default:
break;
+ }
+ break;
+ }
}
if (ptr >= end || *ptr)
cie = NULL;
state.org = startLoc;
memcpy(&state.cfa, &badCFA, sizeof(state.cfa));
/* process instructions */
- if (!processCFI(ptr, end, UNW_PC(frame), ptrType, &state)
+ if (!processCFI(ptr, end, pc, ptrType, &state)
|| state.loc > endLoc
|| state.regs[retAddrReg].where == Nowhere
|| state.cfa.reg >= ARRAY_SIZE(reg_info)
|| state.cfa.offs % sizeof(unsigned long))
return -EIO;
/* update frame */
+#ifndef CONFIG_AS_CFI_SIGNAL_FRAME
+ if(frame->call_frame
+ && !UNW_DEFAULT_RA(state.regs[retAddrReg], state.dataAlign))
+ frame->call_frame = 0;
+#endif
cfa = FRAME_REG(state.cfa.reg, unsigned long) + state.cfa.offs;
startLoc = min((unsigned long)UNW_SP(frame), cfa);
endLoc = max((unsigned long)UNW_SP(frame), cfa);
/*const*/ struct pt_regs *regs)
{
info->task = tsk;
+ info->call_frame = 0;
arch_unw_init_frame_info(info, regs);
return 0;
struct task_struct *tsk)
{
info->task = tsk;
+ info->call_frame = 0;
arch_unw_init_blocked(info);
return 0;
* Prepare to unwind the currently running thread.
*/
int unwind_init_running(struct unwind_frame_info *info,
- asmlinkage void (*callback)(struct unwind_frame_info *,
- void *arg),
+ asmlinkage int (*callback)(struct unwind_frame_info *,
+ void *arg),
void *arg)
{
info->task = current;
- arch_unwind_init_running(info, callback, arg);
+ info->call_frame = 0;
- return 0;
+ return arch_unwind_init_running(info, callback, arg);
}
EXPORT_SYMBOL(unwind_init_running);