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 %vm-invoke ( function -- )
51 temp-reg 0 MOV rc-absolute-cell rt-vm rel-fixup ! push the vm ptr as an argument
56 M: x86.32 return-struct-in-registers? ( c-type -- ? )
58 [ return-in-registers?>> ]
59 [ heap-size { 1 2 4 8 } member? ] bi
60 os { linux netbsd solaris } member? not
63 : struct-return@ ( n -- operand )
64 [ next-stack@ ] [ stack-frame get params>> stack@ ] if* ;
66 ! On x86, parameters are never passed in registers.
67 M: int-regs return-reg drop EAX ;
68 M: int-regs param-regs drop { } ;
69 M: float-regs param-regs drop { } ;
71 GENERIC: push-return-reg ( rep -- )
72 GENERIC: load-return-reg ( n rep -- )
73 GENERIC: store-return-reg ( n rep -- )
75 M: int-rep push-return-reg drop EAX PUSH ;
76 M: int-rep load-return-reg drop EAX swap next-stack@ MOV ;
77 M: int-rep store-return-reg drop stack@ EAX MOV ;
79 M: float-rep push-return-reg drop ESP 4 SUB ESP [] FSTPS ;
80 M: float-rep load-return-reg drop next-stack@ FLDS ;
81 M: float-rep store-return-reg drop stack@ FSTPS ;
83 M: double-rep push-return-reg drop ESP 8 SUB ESP [] FSTPL ;
84 M: double-rep load-return-reg drop next-stack@ FLDL ;
85 M: double-rep store-return-reg drop stack@ FSTPL ;
88 [ align-stack ] keep - decr-stack-reg ;
91 align-stack incr-stack-reg ;
93 : with-aligned-stack ( n quot -- )
94 '[ align-sub @ ] [ align-add ] bi ; inline
96 M: x86.32 %prologue ( n -- )
98 0 PUSH rc-absolute-cell rel-this
99 3 cells - decr-stack-reg ;
101 M: x86.32 %load-param-reg 3drop ;
103 M: x86.32 %save-param-reg 3drop ;
105 : (%box) ( n rep -- )
106 #! If n is f, push the return register onto the stack; we
107 #! are boxing a return value of a C function. If n is an
108 #! integer, push [ESP+n] on the stack; we are boxing a
109 #! parameter being passed to a callback from C.
110 over [ load-return-reg ] [ 2drop ] if ;
112 M:: x86.32 %box ( n rep func -- )
117 ] with-aligned-stack ;
119 : (%box-long-long) ( n -- )
121 EDX over next-stack@ MOV
122 EAX swap cell - next-stack@ MOV
125 M: x86.32 %box-long-long ( n func -- )
126 [ (%box-long-long) ] dip
131 ] with-aligned-stack ;
133 M:: x86.32 %box-large-struct ( n c-type -- )
134 ! Compute destination address
135 ECX n struct-return@ LEA
138 c-type heap-size PUSH
139 ! Push destination address
141 ! Copy the struct from the C stack
142 "box_value_struct" f %alien-invoke
143 ] with-aligned-stack ;
145 M: x86.32 %prepare-box-struct ( -- )
146 ! Compute target address for value struct return
147 EAX f struct-return@ LEA
148 ! Store it as the first parameter
151 M: x86.32 %box-small-struct ( c-type -- )
152 #! Box a <= 8-byte struct returned in EAX:EDX. OS X only.
157 "box_small_struct" f %alien-invoke
158 ] with-aligned-stack ;
160 M: x86.32 %prepare-unbox ( -- )
161 #! Move top of data stack to EAX.
165 : call-unbox-func ( func -- )
168 temp-reg 0 MOV rc-absolute-cell rt-vm rel-fixup ! push the vm ptr as an argument
174 ] with-aligned-stack ;
176 M: x86.32 %unbox ( n rep func -- )
177 #! The value being unboxed must already be in EAX.
178 #! If n is f, we're unboxing a return value about to be
179 #! returned by the callback. Otherwise, we're unboxing
180 #! a parameter to a C function about to be called.
182 ! Store the return value on the C stack
183 over [ store-return-reg ] [ 2drop ] if ;
185 M: x86.32 %unbox-long-long ( n func -- )
187 ! Store the return value on the C stack
190 cell + stack@ EDX MOV
193 : %unbox-struct-1 ( -- )
194 #! Alien must be in EAX.
197 "alien_offset" f %alien-invoke
200 ] with-aligned-stack ;
202 : %unbox-struct-2 ( -- )
203 #! Alien must be in EAX.
206 "alien_offset" f %alien-invoke
211 ] with-aligned-stack ;
213 M: x86 %unbox-small-struct ( size -- )
214 #! Alien must be in EAX.
215 heap-size cell align cell /i {
216 { 1 [ %unbox-struct-1 ] }
217 { 2 [ %unbox-struct-2 ] }
220 M:: x86.32 %unbox-large-struct ( n c-type -- )
221 ! Alien must be in EAX.
222 ! Compute destination address
226 c-type heap-size PUSH
227 ! Push destination address
229 ! Push source address
231 ! Copy the struct to the stack
232 "to_value_struct" f %alien-invoke
233 ] with-aligned-stack ;
235 M: x86.32 %prepare-alien-indirect ( -- )
236 "unbox_alien" f %alien-invoke
239 M: x86.32 %alien-indirect ( -- )
242 M: x86.32 %alien-callback ( quot -- )
244 EAX swap %load-reference
246 param-reg-2 0 MOV rc-absolute-cell rt-vm rel-fixup
247 "c_to_factor" f %alien-invoke
248 ] with-aligned-stack ;
250 M: x86.32 %callback-value ( ctype -- )
253 ! Save top of data stack in non-volatile register
256 ! Restore data/call/retain stacks
257 "unnest_stacks" f %alien-invoke
258 ! Place top of data stack in EAX
265 M: x86.32 %cleanup ( params -- )
266 #! a) If we just called an stdcall function in Windows, it
267 #! cleaned up the stack frame for us. But we don't want that
268 #! so we 'undo' the cleanup since we do that in %epilogue.
269 #! b) If we just called a function returning a struct, we
273 [ dup abi>> "stdcall" = ]
274 [ drop ESP stack-frame get params>> SUB ]
276 [ dup return>> large-struct? ]
282 M: x86.32 %callback-return ( n -- )
283 #! a) If the callback is stdcall, we have to clean up the
284 #! caller's stack frame.
285 #! b) If the callback is returning a large struct, we have
288 { [ dup abi>> "stdcall" = ] [
290 [ params>> ] [ return>> ] bi +
292 { [ dup return>> large-struct? ] [ drop 4 ] }
296 M: x86.32 dummy-stack-params? f ;
298 M: x86.32 dummy-int-params? f ;
300 M: x86.32 dummy-fp-params? f ;
303 cell "longlong" c-type (>>align)
304 cell "ulonglong" c-type (>>align)
305 4 "double" c-type (>>align)
308 "cpu.x86.features" require