1 ! Copyright (C) 2005, 2009 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: locals alien.c-types alien.syntax arrays kernel fry math
4 namespaces sequences system layouts io vocabs.loader accessors init
5 combinators command-line make compiler compiler.units
6 compiler.constants compiler.alien compiler.codegen
7 compiler.codegen.fixup compiler.cfg.instructions compiler.cfg.builder
8 compiler.cfg.intrinsics compiler.cfg.stack-frame cpu.x86.assembler
9 cpu.x86.assembler.operands cpu.x86 cpu.architecture ;
12 ! We implement the FFI for Linux, OS X and Windows all at once.
13 ! OS X requires that the stack be 16-byte aligned.
15 M: x86.32 machine-registers
17 { int-regs { EAX ECX EDX EBP EBX } }
18 { float-regs { XMM0 XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 } }
21 M: x86.32 ds-reg ESI ;
22 M: x86.32 rs-reg EDI ;
23 M: x86.32 stack-reg ESP ;
24 M: x86.32 temp-reg ECX ;
26 M:: x86.32 %dispatch ( src temp -- )
27 ! Load jump table base.
28 temp src HEX: ffffffff [+] LEA
29 building get length cell - :> start
30 0 rc-absolute-cell rel-here
33 building get length :> end
34 ! Fix up the displacement above
36 [ end start - + building get dup pop* push ]
40 ! Registers for fastcall
41 M: x86.32 param-reg-1 EAX ;
42 M: x86.32 param-reg-2 EDX ;
44 M: x86.32 pic-tail-reg EBX ;
46 M: x86.32 reserved-area-size 0 ;
48 M: x86.32 %alien-invoke 0 CALL rc-relative rel-dlsym ;
50 M: x86.32 return-struct-in-registers? ( c-type -- ? )
52 [ return-in-registers?>> ]
53 [ heap-size { 1 2 4 8 } member? ] bi
54 os { linux netbsd solaris } member? not
57 : struct-return@ ( n -- operand )
58 [ next-stack@ ] [ stack-frame get params>> stack@ ] if* ;
60 ! On x86, parameters are never passed in registers.
61 M: int-regs return-reg drop EAX ;
62 M: int-regs param-regs drop { } ;
63 M: float-regs param-regs drop { } ;
65 GENERIC: push-return-reg ( rep -- )
66 GENERIC: load-return-reg ( n rep -- )
67 GENERIC: store-return-reg ( n rep -- )
69 M: int-rep push-return-reg drop EAX PUSH ;
70 M: int-rep load-return-reg drop EAX swap next-stack@ MOV ;
71 M: int-rep store-return-reg drop stack@ EAX MOV ;
73 M: float-rep push-return-reg drop ESP 4 SUB ESP [] FSTPS ;
74 M: float-rep load-return-reg drop next-stack@ FLDS ;
75 M: float-rep store-return-reg drop stack@ FSTPS ;
77 M: double-rep push-return-reg drop ESP 8 SUB ESP [] FSTPL ;
78 M: double-rep load-return-reg drop next-stack@ FLDL ;
79 M: double-rep store-return-reg drop stack@ FSTPL ;
82 [ align-stack ] keep - decr-stack-reg ;
85 align-stack incr-stack-reg ;
87 : with-aligned-stack ( n quot -- )
88 '[ align-sub @ ] [ align-add ] bi ; inline
90 M: x86.32 %prologue ( n -- )
92 0 PUSH rc-absolute-cell rel-this
93 3 cells - decr-stack-reg ;
95 M: x86.32 %load-param-reg 3drop ;
97 M: x86.32 %save-param-reg 3drop ;
100 #! If n is f, push the return register onto the stack; we
101 #! are boxing a return value of a C function. If n is an
102 #! integer, push [ESP+n] on the stack; we are boxing a
103 #! parameter being passed to a callback from C.
104 over [ load-return-reg ] [ 2drop ] if ;
106 M:: x86.32 %box ( n rep func -- )
111 ] with-aligned-stack ;
113 : (%box-long-long) ( n -- )
115 EDX over next-stack@ MOV
116 EAX swap cell - next-stack@ MOV
119 M: x86.32 %box-long-long ( n func -- )
120 [ (%box-long-long) ] dip
125 ] with-aligned-stack ;
127 M:: x86.32 %box-large-struct ( n c-type -- )
128 ! Compute destination address
129 ECX n struct-return@ LEA
132 c-type heap-size PUSH
133 ! Push destination address
135 ! Copy the struct from the C stack
136 "box_value_struct" f %alien-invoke
137 ] with-aligned-stack ;
139 M: x86.32 %prepare-box-struct ( -- )
140 ! Compute target address for value struct return
141 EAX f struct-return@ LEA
142 ! Store it as the first parameter
145 M: x86.32 %box-small-struct ( c-type -- )
146 #! Box a <= 8-byte struct returned in EAX:EDX. OS X only.
151 "box_small_struct" f %alien-invoke
152 ] with-aligned-stack ;
154 M: x86.32 %prepare-unbox ( -- )
155 #! Move top of data stack to EAX.
159 : call-unbox-func ( func -- )
165 ] with-aligned-stack ;
167 M: x86.32 %unbox ( n rep func -- )
168 #! The value being unboxed must already be in EAX.
169 #! If n is f, we're unboxing a return value about to be
170 #! returned by the callback. Otherwise, we're unboxing
171 #! a parameter to a C function about to be called.
173 ! Store the return value on the C stack
174 over [ store-return-reg ] [ 2drop ] if ;
176 M: x86.32 %unbox-long-long ( n func -- )
178 ! Store the return value on the C stack
181 cell + stack@ EDX MOV
184 : %unbox-struct-1 ( -- )
185 #! Alien must be in EAX.
188 "alien_offset" f %alien-invoke
191 ] with-aligned-stack ;
193 : %unbox-struct-2 ( -- )
194 #! Alien must be in EAX.
197 "alien_offset" f %alien-invoke
202 ] with-aligned-stack ;
204 M: x86 %unbox-small-struct ( size -- )
205 #! Alien must be in EAX.
206 heap-size cell align cell /i {
207 { 1 [ %unbox-struct-1 ] }
208 { 2 [ %unbox-struct-2 ] }
211 M:: x86.32 %unbox-large-struct ( n c-type -- )
212 ! Alien must be in EAX.
213 ! Compute destination address
217 c-type heap-size PUSH
218 ! Push destination address
220 ! Push source address
222 ! Copy the struct to the stack
223 "to_value_struct" f %alien-invoke
224 ] with-aligned-stack ;
226 M: x86.32 %prepare-alien-indirect ( -- )
227 "unbox_alien" f %alien-invoke
230 M: x86.32 %alien-indirect ( -- )
233 M: x86.32 %alien-callback ( quot -- )
235 EAX swap %load-reference
237 "c_to_factor" f %alien-invoke
238 ] with-aligned-stack ;
240 M: x86.32 %callback-value ( ctype -- )
243 ! Save top of data stack in non-volatile register
246 ! Restore data/call/retain stacks
247 "unnest_stacks" f %alien-invoke
248 ! Place top of data stack in EAX
255 M: x86.32 %cleanup ( params -- )
256 #! a) If we just called an stdcall function in Windows, it
257 #! cleaned up the stack frame for us. But we don't want that
258 #! so we 'undo' the cleanup since we do that in %epilogue.
259 #! b) If we just called a function returning a struct, we
263 [ dup abi>> "stdcall" = ]
264 [ drop ESP stack-frame get params>> SUB ]
266 [ dup return>> large-struct? ]
272 M: x86.32 %callback-return ( n -- )
273 #! a) If the callback is stdcall, we have to clean up the
274 #! caller's stack frame.
275 #! b) If the callback is returning a large struct, we have
278 { [ dup abi>> "stdcall" = ] [
280 [ params>> ] [ return>> ] bi +
282 { [ dup return>> large-struct? ] [ drop 4 ] }
286 M: x86.32 dummy-stack-params? f ;
288 M: x86.32 dummy-int-params? f ;
290 M: x86.32 dummy-fp-params? f ;
293 cell "longlong" c-type (>>align)
294 cell "ulonglong" c-type (>>align)
295 4 "double" c-type (>>align)
298 "cpu.x86.features" require