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71 lines
1.9 KiB
Text
71 lines
1.9 KiB
Text
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/* See ../README for copyright */
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/*
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* All arguments are passed on the stack with small (< sizeof(void*)) values
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* occupying the space of a pointer.
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* If the method returns a structure, it's address is passed as an invisible
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* first argument.
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*/
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#define MFRAME_STRUCT_BYREF 0
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#define MFRAME_SMALL_STRUCT 0
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#define MFRAME_ARGS_SIZE 104
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#define MFRAME_RESULT_SIZE 16
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#define MFRAME_FLT_IN_FRAME_AS_DBL 0
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/*
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* Structures are passed by reference as an invisible first argument, so
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* they go in the first space on the stack.
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*/
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#define MFRAME_GET_STRUCT_ADDR(ARGS, TYPES) \
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((*(TYPES)==_C_STRUCT_B || *(TYPES)==_C_UNION_B || *(TYPES)==_C_ARY_B) ? \
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*(void**)(ARGS) : (void*)0)
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#define MFRAME_SET_STRUCT_ADDR(ARGS, TYPES, ADDR) \
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({if (*(TYPES)==_C_STRUCT_B || *(TYPES)==_C_UNION_B || *(TYPES)==_C_ARY_B) \
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*(void**)(ARGS) = (ADDR);})
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/*
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* Declare a type for keeping track of the arguments processed.
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*/
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typedef int MFRAME_ARGS;
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/*
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* Initialize a variable to keep track of argument info while processing a
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* method. Keeps count of the offset of arguments on the stack.
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* This offset is adjusted to take account of an invisible first argument
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* used to return structures.
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*/
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#define MFRAME_INIT_ARGS(CUM, RTYPE) \
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({ \
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(CUM) = \
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((*(RTYPE)==_C_STRUCT_B || *(RTYPE)==_C_UNION_B || *(RTYPE)==_C_ARY_B) ? \
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sizeof(void*) : 0); \
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})
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#define MFRAME_ARG_ENCODING(CUM, TYPE, STACK, DEST) \
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({ \
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const char* type = (TYPE); \
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int align, size; \
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\
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(TYPE) = objc_skip_typespec(type); \
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align = objc_alignof_type (type); \
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size = objc_sizeof_type (type); \
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\
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(CUM) = ROUND ((CUM), align); \
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sprintf((DEST), "%.*s%d", (TYPE)-type, type, (CUM)); \
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(STACK) = (CUM) + size; \
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(CUM) += ROUND(size, sizeof(void*)); \
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(DEST)=&(DEST)[strlen(DEST)]; \
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if (*(TYPE) == '+') \
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{ \
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(TYPE)++; \
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} \
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while (isdigit(*(TYPE))) \
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{ \
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(TYPE)++; \
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} \
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})
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