using namespace __cxxabiv1;
-
-\f
-// ??? These ought to go somewhere else dwarf2 or dwarf2eh related.
-
-// Pointer encodings.
-#define DW_EH_PE_absptr 0x00
-#define DW_EH_PE_omit 0xff
-
-#define DW_EH_PE_uleb128 0x01
-#define DW_EH_PE_udata2 0x02
-#define DW_EH_PE_udata4 0x03
-#define DW_EH_PE_udata8 0x04
-#define DW_EH_PE_sleb128 0x09
-#define DW_EH_PE_sdata2 0x0A
-#define DW_EH_PE_sdata4 0x0B
-#define DW_EH_PE_sdata8 0x0C
-#define DW_EH_PE_signed 0x08
-
-#define DW_EH_PE_pcrel 0x10
-#define DW_EH_PE_textrel 0x20
-#define DW_EH_PE_datarel 0x30
-#define DW_EH_PE_funcrel 0x40
-
-static unsigned int
-size_of_encoded_value (unsigned char encoding)
-{
- switch (encoding & 0x07)
- {
- case DW_EH_PE_absptr:
- return sizeof (void *);
- case DW_EH_PE_udata2:
- return 2;
- case DW_EH_PE_udata4:
- return 4;
- case DW_EH_PE_udata8:
- return 8;
- }
- abort ();
-}
-
-static const unsigned char *
-read_encoded_value (_Unwind_Context *context, unsigned char encoding,
- const unsigned char *p, _Unwind_Ptr *val)
-{
- union unaligned
- {
- void *ptr;
- unsigned u2 __attribute__ ((mode (HI)));
- unsigned u4 __attribute__ ((mode (SI)));
- unsigned u8 __attribute__ ((mode (DI)));
- signed s2 __attribute__ ((mode (HI)));
- signed s4 __attribute__ ((mode (SI)));
- signed s8 __attribute__ ((mode (DI)));
- } __attribute__((__packed__));
-
- union unaligned *u = (union unaligned *) p;
- _Unwind_Ptr result;
-
- switch (encoding & 0x0f)
- {
- case DW_EH_PE_absptr:
- result = (_Unwind_Ptr) u->ptr;
- p += sizeof (void *);
- break;
-
- case DW_EH_PE_uleb128:
- {
- unsigned int shift = 0;
- unsigned char byte;
-
- result = 0;
- do
- {
- byte = *p++;
- result |= (_Unwind_Ptr)(byte & 0x7f) << shift;
- shift += 7;
- }
- while (byte & 0x80);
- }
- break;
-
- case DW_EH_PE_sleb128:
- {
- unsigned int shift = 0;
- unsigned char byte;
-
- result = 0;
- do
- {
- byte = *p++;
- result |= (_Unwind_Ptr)(byte & 0x7f) << shift;
- shift += 7;
- }
- while (byte & 0x80);
-
- if (shift < 8 * sizeof(result) && (byte & 0x40) != 0)
- result |= -(1L << shift);
- }
- break;
-
- case DW_EH_PE_udata2:
- result = u->u2;
- p += 2;
- break;
- case DW_EH_PE_udata4:
- result = u->u4;
- p += 4;
- break;
- case DW_EH_PE_udata8:
- result = u->u8;
- p += 8;
- break;
-
- case DW_EH_PE_sdata2:
- result = u->s2;
- p += 2;
- break;
- case DW_EH_PE_sdata4:
- result = u->s4;
- p += 4;
- break;
- case DW_EH_PE_sdata8:
- result = u->s8;
- p += 8;
- break;
-
- default:
- abort ();
- }
-
- if (result != 0)
- switch (encoding & 0xf0)
- {
- case DW_EH_PE_absptr:
- break;
-
- case DW_EH_PE_pcrel:
- // Define as relative to the beginning of the pointer.
- result += (_Unwind_Ptr) u;
- break;
-
- case DW_EH_PE_textrel:
- case DW_EH_PE_datarel:
- // FIXME.
- abort ();
-
- case DW_EH_PE_funcrel:
- result += _Unwind_GetRegionStart (context);
- break;
-
- default:
- abort ();
- }
-
- *val = result;
- return p;
-}
-
-static inline const unsigned char *
-read_uleb128 (const unsigned char *p, _Unwind_Ptr *val)
-{
- return read_encoded_value (0, DW_EH_PE_uleb128, p, val);
-}
-
-static inline const unsigned char *
-read_sleb128 (const unsigned char *p, _Unwind_Ptr *val)
-{
- return read_encoded_value (0, DW_EH_PE_sleb128, p, val);
-}
+#include "unwind-pe.h"
\f
struct lsda_header_info
{
_Unwind_Ptr Start;
_Unwind_Ptr LPStart;
+ _Unwind_Ptr ttype_base;
const unsigned char *TType;
const unsigned char *action_table;
unsigned char ttype_encoding;
}
static const std::type_info *
-get_ttype_entry (_Unwind_Context *context, lsda_header_info *info, long i)
+get_ttype_entry (lsda_header_info *info, long i)
{
_Unwind_Ptr ptr;
i *= size_of_encoded_value (info->ttype_encoding);
- read_encoded_value (context, info->ttype_encoding, info->TType - i, &ptr);
+ read_encoded_value_with_base (info->ttype_encoding, info->ttype_base,
+ info->TType - i, &ptr);
return reinterpret_cast<const std::type_info *>(ptr);
}
static bool
-check_exception_spec (_Unwind_Context *context, lsda_header_info *info,
- const std::type_info *throw_type, long filter_value)
+check_exception_spec (lsda_header_info *info, const std::type_info *throw_type,
+ long filter_value)
{
const unsigned char *e = info->TType - filter_value - 1;
return false;
// Match a ttype entry.
- catch_type = get_ttype_entry (context, info, tmp);
+ catch_type = get_ttype_entry (info, tmp);
if (catch_type->__do_catch (throw_type, &dummy, 1))
return true;
}
// Parse the LSDA header.
p = parse_lsda_header (context, language_specific_data, &info);
+ info.ttype_base = base_of_encoded_value (info.ttype_encoding, context);
ip = _Unwind_GetIP (context) - 1;
landing_pad = 0;
action_record = 0;
else if (ar_filter > 0)
{
// Positive filter values are handlers.
- catch_type = get_ttype_entry (context, &info, ar_filter);
+ catch_type = get_ttype_entry (&info, ar_filter);
adjusted_ptr = xh + 1;
// Null catch type is a catch-all handler. We can catch
// see we can't match because there's no __cxa_exception
// object to stuff bits in for __cxa_call_unexpected to use.
if (throw_type
- && ! check_exception_spec (context, &info, throw_type,
- ar_filter))
+ && ! check_exception_spec (&info, throw_type, ar_filter))
{
saw_handler = true;
break;
__terminate (xh->terminateHandler);
}
+ // Cache the TType base value for __cxa_call_unexpected, as we won't
+ // have an _Unwind_Context then.
+ if (handler_switch_value < 0)
+ {
+ parse_lsda_header (context, xh->languageSpecificData, &info);
+ xh->catchTemp = (void *) base_of_encoded_value (info.ttype_encoding,
+ context);
+ }
+
_Unwind_SetGR (context, __builtin_eh_return_data_regno (0),
(_Unwind_Ptr) &xh->unwindHeader);
_Unwind_SetGR (context, __builtin_eh_return_data_regno (1),
// We don't quite have enough stuff cached; re-parse the LSDA.
lsda_header_info info;
parse_lsda_header (0, xh->languageSpecificData, &info);
+ info.ttype_base = (_Unwind_Ptr) xh->catchTemp;
// If this new exception meets the exception spec, allow it.
- if (check_exception_spec (0, &info, new_xh->exceptionType,
+ if (check_exception_spec (&info, new_xh->exceptionType,
xh->handlerSwitchValue))
throw;
// If the exception spec allows std::bad_exception, throw that.
const std::type_info &bad_exc = typeid (std::bad_exception);
- if (check_exception_spec (0, &info, &bad_exc, xh->handlerSwitchValue))
+ if (check_exception_spec (&info, &bad_exc, xh->handlerSwitchValue))
throw std::bad_exception ();
// Otherwise, die.
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