1 files changed, 195 insertions, 0 deletions
diff --git a/thunk.h b/thunk.h
new file mode 100644
index 0000000000..932bbcf0d0
--- /dev/null
+++ b/thunk.h
@@ -0,0 +1,195 @@
+#ifndef THUNK_H
+#define THUNK_H
+
+#include <inttypes.h>
+#include <byteswap.h>
+
+#undef WORDS_BIGENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
+#define WORDS_BIGENDIAN
+#endif
+
+#ifdef WORD_BIGENDIAN
+#define BSWAP_NEEDED
+#endif
+
+/* XXX: auto autoconf */
+#define TARGET_I386
+#define TARGET_LONG_BITS 32
+
+
+#if defined(__alpha__)
+#define HOST_LONG_BITS 64
+#else
+#define HOST_LONG_BITS 32
+#endif
+
+#define TARGET_LONG_SIZE (TARGET_LONG_BITS / 8)
+#define HOST_LONG_SIZE (TARGET_LONG_BITS / 8)
+
+static inline uint16_t bswap16(uint16_t x)
+{
+    return bswap_16(x);
+}
+
+static inline uint32_t bswap32(uint32_t x) 
+{
+    return bswap_32(x);
+}
+
+static inline uint64_t bswap64(uint64_t x) 
+{
+    return bswap_64(x);
+}
+
+static void inline bswap16s(uint16_t *s)
+{
+    *s = bswap16(*s);
+}
+
+static void inline bswap32s(uint32_t *s)
+{
+    *s = bswap32(*s);
+}
+
+static void inline bswap64s(uint64_t *s)
+{
+    *s = bswap64(*s);
+}
+
+#ifdef BSWAP_NEEDED
+
+static inline uint16_t tswap16(uint16_t s)
+{
+    return bswap16(s);
+}
+
+static inline uint32_t tswap32(uint32_t s)
+{
+    return bswap32(s);
+}
+
+static inline uint64_t tswap64(uint64_t s)
+{
+    return bswap64(s);
+}
+
+static void inline tswap16s(uint16_t *s)
+{
+    *s = bswap16(*s);
+}
+
+static void inline tswap32s(uint32_t *s)
+{
+    *s = bswap32(*s);
+}
+
+static void inline tswap64s(uint64_t *s)
+{
+    *s = bswap64(*s);
+}
+
+#else
+
+static inline uint16_t tswap16(uint16_t s)
+{
+    return s;
+}
+
+static inline uint32_t tswap32(uint32_t s)
+{
+    return s;
+}
+
+static inline uint64_t tswap64(uint64_t s)
+{
+    return s;
+}
+
+static void inline tswap16s(uint16_t *s)
+{
+}
+
+static void inline tswap32s(uint32_t *s)
+{
+}
+
+static void inline tswap64s(uint64_t *s)
+{
+}
+
+#endif
+
+#if TARGET_LONG_SIZE == 4
+#define tswapl(s) tswap32(s)
+#define tswapls(s) tswap32s((uint32_t *)(s))
+#else
+#define tswapl(s) tswap64(s)
+#define tswapls(s) tswap64s((uint64_t *)(s))
+#endif
+
+#if TARGET_LONG_SIZE == 4
+typedef int32_t target_long;
+typedef uint32_t target_ulong;
+#elif TARGET_LONG_SIZE == 8
+typedef int64_t target_long;
+typedef uint64_t target_ulong;
+#else
+#error TARGET_LONG_SIZE undefined
+#endif
+
+/* types enums definitions */
+
+typedef enum argtype {
+    TYPE_NULL,
+    TYPE_CHAR,
+    TYPE_SHORT,
+    TYPE_INT,
+    TYPE_LONG,
+    TYPE_ULONG,
+    TYPE_PTRVOID, /* pointer on unknown data */
+    TYPE_LONGLONG,
+    TYPE_ULONGLONG,
+    TYPE_PTR,
+    TYPE_ARRAY,
+    TYPE_STRUCT,
+} argtype;
+
+#define MK_PTR(type) TYPE_PTR, type
+#define MK_ARRAY(type, size) TYPE_ARRAY, size, type
+#define MK_STRUCT(id) TYPE_STRUCT, id
+
+#define THUNK_TARGET 0
+#define THUNK_HOST   1
+
+typedef struct {
+    /* standard struct handling */
+    const argtype *field_types;
+    int nb_fields;
+    int *field_offsets[2];
+    /* special handling */
+    void (*convert[2])(void *dst, const void *src);
+    int size[2];
+    int align[2];
+    const char *name;
+} StructEntry;
+
+/* Translation table for bitmasks... */
+typedef struct bitmask_transtbl {
+	unsigned int	x86_mask;
+	unsigned int	x86_bits;
+	unsigned int	alpha_mask;
+	unsigned int	alpha_bits;
+} bitmask_transtbl;
+
+void thunk_register_struct(int id, const char *name, const argtype *types);
+void thunk_register_struct_direct(int id, const char *name, StructEntry *se1);
+const argtype *thunk_convert(void *dst, const void *src, 
+                             const argtype *type_ptr, int to_host);
+
+unsigned int target_to_host_bitmask(unsigned int x86_mask, 
+                                    bitmask_transtbl * trans_tbl);
+unsigned int host_to_target_bitmask(unsigned int alpha_mask, 
+                                    bitmask_transtbl * trans_tbl);
+
+#endif