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extern uint64_t _Unwind_GetIP(struct _Unwind_Context*);
extern void _Unwind_SetIP(struct _Unwind_Context*, uint64_t);
extern void _Unwind_SetGR(struct _Unwind_Context*, int, uint64_t);
extern void _Unwind_DeleteException(struct _Unwind_Exception*);
static objc_uncaught_exception_handler uncaught_exception_handler;
static inline uint64_t
read_leb128(const uint8_t **ptr, uint8_t *bits)
{
uint64_t value = 0;
uint8_t shift = 0;
do {
value |= (**ptr & 0x7F) << shift;
(*ptr)++;
shift += 7;
} while (*(*ptr - 1) & 0x80);
if (bits != NULL)
*bits = shift;
static uint64_t
read_uleb128(const uint8_t **ptr)
{
return read_leb128(ptr, NULL);
}
value = read_leb128(ptr, &bits);
if (bits < 64 && value & (1 << (bits - 1)))
value |= -(1 << bits);
return value;
}
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extern uint64_t _Unwind_GetIP(struct _Unwind_Context*);
extern void _Unwind_SetIP(struct _Unwind_Context*, uint64_t);
extern void _Unwind_SetGR(struct _Unwind_Context*, int, uint64_t);
extern void _Unwind_DeleteException(struct _Unwind_Exception*);
static objc_uncaught_exception_handler uncaught_exception_handler;
static uint64_t
read_uleb128(const uint8_t **ptr)
{
uint64_t value = 0;
uint8_t shift = 0;
do {
value |= (**ptr & 0x7F) << shift;
(*ptr)++;
shift += 7;
} while (*(*ptr - 1) & 0x80);
return value;
}
static int64_t
read_sleb128(const uint8_t **ptr)
{
const uint8_t *oldptr = *ptr;
uint8_t bits;
int64_t value;
value = read_uleb128(ptr);
bits = (*ptr - oldptr) * 7;
if (bits < 64 && value & (1 << (bits - 1)))
value |= -(1 << bits);
return value;
}
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{
uint64_t value;
if (enc == DW_EH_PE_aligned)
/* Not implemented */
abort();
#define READ_TYPE(type, size) \
{ \
value = *(type*)(void*)*ptr; \
*ptr += size; \
break; \
}
switch (enc & 0x0F) {
case DW_EH_PE_absptr:
READ_TYPE(uintptr_t, sizeof(void*))
case DW_EH_PE_uleb128:
value = read_uleb128(ptr);
break;
case DW_EH_PE_udata2:
READ_TYPE(uint16_t, 2)
case DW_EH_PE_udata4:
READ_TYPE(uint32_t, 4)
case DW_EH_PE_udata8:
READ_TYPE(uint64_t, 8)
case DW_EH_PE_sleb128:
value = read_sleb128(ptr);
break;
case DW_EH_PE_sdata2:
READ_TYPE(int16_t, 2)
case DW_EH_PE_sdata4:
READ_TYPE(int32_t, 4)
case DW_EH_PE_sdata8:
READ_TYPE(int64_t, 8)
default:
abort();
}
#undef READ_TYPE
return value;
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{
uint64_t value;
if (enc == DW_EH_PE_aligned)
/* Not implemented */
abort();
#define READ_TYPE(type) \
{ \
value = *(type*)(void*)*ptr; \
*ptr += size_for_encoding(enc); \
break; \
}
switch (enc & 0x0F) {
case DW_EH_PE_absptr:
READ_TYPE(uintptr_t)
case DW_EH_PE_uleb128:
value = read_uleb128(ptr);
break;
case DW_EH_PE_udata2:
READ_TYPE(uint16_t)
case DW_EH_PE_udata4:
READ_TYPE(uint32_t)
case DW_EH_PE_udata8:
READ_TYPE(uint64_t)
case DW_EH_PE_sleb128:
value = read_sleb128(ptr);
break;
case DW_EH_PE_sdata2:
READ_TYPE(int16_t)
case DW_EH_PE_sdata4:
READ_TYPE(int32_t)
case DW_EH_PE_sdata8:
READ_TYPE(int64_t)
default:
abort();
}
#undef READ_TYPE
return value;
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read_lsda(struct _Unwind_Context *ctx, const uint8_t *ptr, struct lsda *lsda)
{
uint8_t landingpads_start_enc;
uintptr_t callsites_size;
lsda->region_start = _Unwind_GetRegionStart(ctx);
lsda->landingpads_start = lsda->region_start;
lsda->typestable = 0;
if ((landingpads_start_enc = *ptr++) != DW_EH_PE_omit)
lsda->landingpads_start =
read_value(landingpads_start_enc, &ptr);
if ((lsda->typestable_enc = *ptr++) != DW_EH_PE_omit) {
uintptr_t tmp = read_uleb128(&ptr);
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read_lsda(struct _Unwind_Context *ctx, const uint8_t *ptr, struct lsda *lsda)
{
uint8_t landingpads_start_enc;
uintptr_t callsites_size;
lsda->region_start = _Unwind_GetRegionStart(ctx);
lsda->landingpads_start = lsda->region_start;
lsda->typestable = NULL;
if ((landingpads_start_enc = *ptr++) != DW_EH_PE_omit)
lsda->landingpads_start =
read_value(landingpads_start_enc, &ptr);
if ((lsda->typestable_enc = *ptr++) != DW_EH_PE_omit) {
uintptr_t tmp = read_uleb128(&ptr);
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