------- Additional Comments From schlie at comcast dot net 2004-12-21 20:19
-------
Minimal changes required to get avr to build:
(which disables DI/DF emulation modes which appear to exceed avr's allocatable
registers. )
*** In File: config/avr.h, Beginning line: 111 ***
#define BITS_BIG_ENDIAN 0
#define BYTES_BIG_ENDIAN 0
#define WORDS_BIG_ENDIAN 0
#ifdef IN_LIBGCC2
- /* This is to get correct SI and DI modes in libgcc2.c (32 and 64 bits). */
+ /* To map SI/DI modes in libgcc2.c to HI/SI modes (16 and 32 bits). */
- #define UNITS_PER_WORD 4
+ #define UNITS_PER_WORD 2
#else
/* Width of a word, in units (bytes). */
#define UNITS_PER_WORD 1
#endif
#define POINTER_SIZE 16
*** In File: config/avr.h, Beginning line: 142 ***
#define INT_TYPE_SIZE (TARGET_INT8 ? 8 : 16)
#define SHORT_TYPE_SIZE (INT_TYPE_SIZE == 8 ? INT_TYPE_SIZE : 16)
#define LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 16 : 32)
- #define LONG_LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 32 : 64)
+ #define LONG_LONG_TYPE_SIZE (INT_TYPE_SIZE == 8 ? 32 : 32)
#define FLOAT_TYPE_SIZE 32
#define DOUBLE_TYPE_SIZE 32
#define LONG_DOUBLE_TYPE_SIZE 32
#define DEFAULT_SIGNED_CHAR 1
+ #define SMALL_EH_ENCODEING 1
+
#define SIZE_TYPE (INT_TYPE_SIZE == 8 ? "long unsigned int" : "unsigned int")
#define PTRDIFF_TYPE (INT_TYPE_SIZE == 8 ? "long int" :"int")
*** In File: unwind.h, beginning line: 55 ***
/* @@@ The IA-64 ABI uses a 64-bit word to identify the producer and
consumer of an exception. We'll go along with this for now even on
32-bit machines. We'll need to provide some other option for
16-bit machines and for machines with > 8 bits per byte. */
+ #include "tm.h" /* Fixme: just a temporary hack for small targets. */
+ #if (SMALL_EH_ENCODEING)
+ typedef unsigned _Unwind_Exception_Class __attribute__((__mode__(__SI__)));
+ #else
typedef unsigned _Unwind_Exception_Class __attribute__((__mode__(__DI__)));
+ #endif
/* The unwind interface uses reason codes in several contexts to
identify the reasons for failures or other actions. */
*** In File: unwind-pe.h, beginning line: 37 ***
/* If using C++, references to abort have to be qualified with std::. */
#if __cplusplus
#define __gxx_abort std::abort
#else
#define __gxx_abort abort
#endif
+ #include "tm.h" /* Fixme: just a temporary hack for small targets. */
+
/* Pointer encodings, from dwarf2.h. */
#define DW_EH_PE_absptr 0x00
#define DW_EH_PE_omit 0xff
*** In File: unwind-pe.h, beginning line: 184 ***
static const unsigned char *
read_encoded_value_with_base (unsigned char encoding, _Unwind_Ptr base,
const unsigned char *p, _Unwind_Ptr *val)
{
+ #if (SMALL_EH_ENCODEING) /* Fixme: just a temporary hack for small targets. */
+ union unaligned
+ {
+ void *ptr;
+ unsigned u2 __attribute__ ((mode (QI)));
+ unsigned u4 __attribute__ ((mode (HI)));
+ unsigned u8 __attribute__ ((mode (SI)));
+ signed s2 __attribute__ ((mode (QI)));
+ signed s4 __attribute__ ((mode (HI)));
+ signed s8 __attribute__ ((mode (SI)));
+ } __attribute__((__packed__));
+ #else
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__));
+ #endif
const union unaligned *u = (const union unaligned *) p;
_Unwind_Internal_Ptr result;
*** end ***
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18887
