static unsigned long read_pointer(const u8 **pLoc,
const void *end,
- signed ptrType);
+ signed ptrType,
+ unsigned long text_base,
+ unsigned long data_base);
static void init_unwind_table(struct unwind_table *table,
const char *name,
/* See if the linker provided table looks valid. */
if (header_size <= 4
|| header_start[0] != 1
- || (void *)read_pointer(&ptr, end, header_start[1]) != table_start
- || header_start[2] == DW_EH_PE_omit
- || read_pointer(&ptr, end, header_start[2]) <= 0
- || header_start[3] == DW_EH_PE_omit)
+ || (void *)read_pointer(&ptr, end, header_start[1], 0, 0)
+ != table_start
+ || !read_pointer(&ptr, end, header_start[2], 0, 0)
+ || !read_pointer(&ptr, end, header_start[3], 0,
+ (unsigned long)header_start)
+ || !read_pointer(&ptr, end, header_start[3], 0,
+ (unsigned long)header_start))
header_start = NULL;
table->hdrsz = header_size;
smp_wmb();
ptr = (const u8 *)(fde + 2);
if (!read_pointer(&ptr,
(const u8 *)(fde + 1) + *fde,
- ptrType))
+ ptrType, 0, 0))
return;
++n;
}
ptr = (const u8 *)(fde + 2);
header->table[n].start = read_pointer(&ptr,
(const u8 *)(fde + 1) + *fde,
- fde_pointer_type(cie));
+ fde_pointer_type(cie), 0, 0);
header->table[n].fde = (unsigned long)fde;
++n;
}
static unsigned long read_pointer(const u8 **pLoc,
const void *end,
- signed ptrType)
+ signed ptrType,
+ unsigned long text_base,
+ unsigned long data_base)
{
unsigned long value = 0;
union {
case DW_EH_PE_pcrel:
value += (unsigned long)*pLoc;
break;
+ case DW_EH_PE_textrel:
+ if (likely(text_base)) {
+ value += text_base;
+ break;
+ }
+ dprintk(2, "Text-relative encoding %02X (%p,%p), but zero text base.",
+ ptrType, *pLoc, end);
+ return 0;
+ case DW_EH_PE_datarel:
+ if (likely(data_base)) {
+ value += data_base;
+ break;
+ }
+ dprintk(2, "Data-relative encoding %02X (%p,%p), but zero data base.",
+ ptrType, *pLoc, end);
+ return 0;
default:
dprintk(2, "Cannot adjust pointer type %02X (%p,%p).",
ptrType, *pLoc, end);
case 'P': {
signed ptrType = *ptr++;
- if (!read_pointer(&ptr, end, ptrType) || ptr > end)
+ if (!read_pointer(&ptr, end, ptrType, 0, 0)
+ || ptr > end)
return -1;
}
break;
case DW_CFA_nop:
break;
case DW_CFA_set_loc:
- if ((state->loc = read_pointer(&ptr.p8, end, ptrType)) == 0)
+ state->loc = read_pointer(&ptr.p8, end, ptrType, 0, 0);
+ if (state->loc == 0)
result = 0;
break;
case DW_CFA_advance_loc1:
ptr = hdr + 4;
end = hdr + table->hdrsz;
if (tableSize
- && read_pointer(&ptr, end, hdr[1])
+ && read_pointer(&ptr, end, hdr[1], 0, 0)
== (unsigned long)table->address
- && (i = read_pointer(&ptr, end, hdr[2])) > 0
+ && (i = read_pointer(&ptr, end, hdr[2], 0, 0)) > 0
&& i == (end - ptr) / (2 * tableSize)
&& !((end - ptr) % (2 * tableSize))) {
do {
startLoc = read_pointer(&cur,
cur + tableSize,
- hdr[3]);
+ hdr[3], 0,
+ (unsigned long)hdr);
if (pc < startLoc)
i /= 2;
else {
if (i == 1
&& (startLoc = read_pointer(&ptr,
ptr + tableSize,
- hdr[3])) != 0
+ hdr[3], 0,
+ (unsigned long)hdr)) != 0
&& pc >= startLoc)
fde = (void *)read_pointer(&ptr,
ptr + tableSize,
- hdr[3]);
+ hdr[3], 0,
+ (unsigned long)hdr);
}
}
if(hdr && !fde)
&& (ptrType = fde_pointer_type(cie)) >= 0
&& read_pointer(&ptr,
(const u8 *)(fde + 1) + *fde,
- ptrType) == startLoc) {
+ ptrType, 0, 0) == startLoc) {
if (!(ptrType & DW_EH_PE_indirect))
ptrType &= DW_EH_PE_FORM|DW_EH_PE_signed;
endLoc = startLoc
+ read_pointer(&ptr,
(const u8 *)(fde + 1) + *fde,
- ptrType);
+ ptrType, 0, 0);
if(pc >= endLoc)
fde = NULL;
} else
ptr = (const u8 *)(fde + 2);
startLoc = read_pointer(&ptr,
(const u8 *)(fde + 1) + *fde,
- ptrType);
+ ptrType, 0, 0);
if (!startLoc)
continue;
if (!(ptrType & DW_EH_PE_indirect))
endLoc = startLoc
+ read_pointer(&ptr,
(const u8 *)(fde + 1) + *fde,
- ptrType);
+ ptrType, 0, 0);
if (pc >= startLoc && pc < endLoc)
break;
}