6 #define FRAME_RETURN_ADDRESS(frame) *(void **)(frame_successor(frame) + 1)
8 inline static void flush_icache(cell start, cell len) {}
10 /* In the instruction sequence:
15 the offset from the immediate operand to MOV to the instruction after
16 the jump is a cell for the immediate operand, 4 bytes for the JMP
17 destination, and one byte for the JMP opcode. */
18 static const fixnum xt_tail_pic_offset = sizeof(cell) + 4 + 1;
20 static const unsigned char call_opcode = 0xe8;
21 static const unsigned char jmp_opcode = 0xe9;
23 inline static unsigned char call_site_opcode(cell return_address)
25 return *(unsigned char *)(return_address - 5);
28 inline static void check_call_site(cell return_address)
31 unsigned char opcode = call_site_opcode(return_address);
32 assert(opcode == call_opcode || opcode == jmp_opcode);
36 inline static void *get_call_target(cell return_address)
38 check_call_site(return_address);
39 return (void *)(*(int *)(return_address - 4) + return_address);
42 inline static void set_call_target(cell return_address, void *target)
44 check_call_site(return_address);
45 *(int *)(return_address - 4) = ((cell)target - return_address);
48 inline static bool tail_call_site_p(cell return_address)
50 return call_site_opcode(return_address) == jmp_opcode;
53 inline static unsigned int fpu_status(unsigned int status)
58 r |= FP_TRAP_INVALID_OPERATION;
60 r |= FP_TRAP_ZERO_DIVIDE;
62 r |= FP_TRAP_OVERFLOW;
64 r |= FP_TRAP_UNDERFLOW;
71 /* Defined in assembly */
72 VM_ASM_API void c_to_factor(cell quot, void *vm);
73 VM_ASM_API void throw_impl(cell quot, stack_frame *rewind_to, void *vm);
74 VM_ASM_API void lazy_jit_compile(cell quot, void *vm);
76 VM_C_API void set_callstack(stack_frame *to,
79 void *(*memcpy)(void*,const void*, size_t));