diff options
Diffstat (limited to 'libffi.old/src/m68k/ffi.c')
| -rw-r--r-- | libffi.old/src/m68k/ffi.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/libffi.old/src/m68k/ffi.c b/libffi.old/src/m68k/ffi.c new file mode 100644 index 0000000..55f3a98 --- /dev/null +++ b/libffi.old/src/m68k/ffi.c @@ -0,0 +1,176 @@ +/* ----------------------------------------------------------------------- + ffi.c + + m68k Foreign Function Interface + ----------------------------------------------------------------------- */ + +#include <ffi.h> +#include <ffi_common.h> + +#include <stdlib.h> + +/* ffi_prep_args is called by the assembly routine once stack space has + been allocated for the function's arguments. */ + +static void * +ffi_prep_args (void *stack, extended_cif *ecif) +{ + unsigned int i; + void **p_argv; + char *argp; + ffi_type **p_arg; + void *struct_value_ptr; + + argp = stack; + + if (ecif->cif->rtype->type == FFI_TYPE_STRUCT + && ecif->cif->rtype->size > 8) + struct_value_ptr = ecif->rvalue; + else + struct_value_ptr = NULL; + + p_argv = ecif->avalue; + + for (i = ecif->cif->nargs, p_arg = ecif->cif->arg_types; + i != 0; + i--, p_arg++) + { + size_t z; + + /* Align if necessary. */ + if (((*p_arg)->alignment - 1) & (unsigned) argp) + argp = (char *) ALIGN (argp, (*p_arg)->alignment); + + z = (*p_arg)->size; + if (z < sizeof (int)) + { + switch ((*p_arg)->type) + { + case FFI_TYPE_SINT8: + *(signed int *) argp = (signed int) *(SINT8 *) *p_argv; + break; + + case FFI_TYPE_UINT8: + *(unsigned int *) argp = (unsigned int) *(UINT8 *) *p_argv; + break; + + case FFI_TYPE_SINT16: + *(signed int *) argp = (signed int) *(SINT16 *) *p_argv; + break; + + case FFI_TYPE_UINT16: + *(unsigned int *) argp = (unsigned int) *(UINT16 *) *p_argv; + break; + + case FFI_TYPE_STRUCT: + memcpy (argp + sizeof (int) - z, *p_argv, z); + break; + + default: + FFI_ASSERT (0); + } + z = sizeof (int); + } + else + memcpy (argp, *p_argv, z); + p_argv++; + argp += z; + } + + return struct_value_ptr; +} + +#define CIF_FLAGS_INT 1 +#define CIF_FLAGS_DINT 2 +#define CIF_FLAGS_FLOAT 4 +#define CIF_FLAGS_DOUBLE 8 +#define CIF_FLAGS_LDOUBLE 16 +#define CIF_FLAGS_POINTER 32 +#define CIF_FLAGS_STRUCT 64 + +/* Perform machine dependent cif processing */ +ffi_status +ffi_prep_cif_machdep (ffi_cif *cif) +{ + /* Set the return type flag */ + switch (cif->rtype->type) + { + case FFI_TYPE_VOID: + cif->flags = 0; + break; + + case FFI_TYPE_STRUCT: + if (cif->rtype->size > 4 && cif->rtype->size <= 8) + cif->flags = CIF_FLAGS_DINT; + else if (cif->rtype->size <= 4) + cif->flags = CIF_FLAGS_STRUCT; + else + cif->flags = 0; + break; + + case FFI_TYPE_FLOAT: + cif->flags = CIF_FLAGS_FLOAT; + break; + + case FFI_TYPE_DOUBLE: + cif->flags = CIF_FLAGS_DOUBLE; + break; + + case FFI_TYPE_LONGDOUBLE: + cif->flags = CIF_FLAGS_LDOUBLE; + break; + + case FFI_TYPE_POINTER: + cif->flags = CIF_FLAGS_POINTER; + break; + + case FFI_TYPE_SINT64: + case FFI_TYPE_UINT64: + cif->flags = CIF_FLAGS_DINT; + break; + + default: + cif->flags = CIF_FLAGS_INT; + break; + } + + return FFI_OK; +} + +extern void ffi_call_SYSV (void *(*) (void *, extended_cif *), + extended_cif *, + unsigned, unsigned, unsigned, + void *, void (*fn) ()); + +void +ffi_call (ffi_cif *cif, void (*fn) (), void *rvalue, void **avalue) +{ + extended_cif ecif; + + ecif.cif = cif; + ecif.avalue = avalue; + + /* If the return value is a struct and we don't have a return value + address then we need to make one. */ + + if (rvalue == NULL + && cif->rtype->type == FFI_TYPE_STRUCT + && cif->rtype->size > 8) + ecif.rvalue = alloca (cif->rtype->size); + else + ecif.rvalue = rvalue; + + + switch (cif->abi) + { + case FFI_SYSV: + ffi_call_SYSV (ffi_prep_args, &ecif, cif->bytes, + cif->flags, cif->rtype->size * 8, + ecif.rvalue, fn); + break; + + default: + FFI_ASSERT (0); + break; + } +} |