ppc-darwin_closure.S [plain text]
#if defined(__ppc__)
/* -----------------------------------------------------------------------
ppc-darwin_closure.S - Copyright (c) 2002, 2003, 2004, Free Software Foundation,
Inc. based on ppc_closure.S
PowerPC Assembly glue.
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
``Software''), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
----------------------------------------------------------------------- */
#define LIBFFI_ASM
#include <ffi.h>
#include <ppc-ffitarget.h> // for FFI_TRAMPOLINE_SIZE
#include <ppc-darwin.h>
#include <architecture/ppc/mode_independent_asm.h>
.file "ppc-darwin_closure.S"
.text
.align LOG2_GPR_BYTES
.globl _ffi_closure_ASM
.text
.align LOG2_GPR_BYTES
_ffi_closure_ASM:
LFB1:
mflr r0 // Save return address
stg r0,SF_RETURN(r1)
LCFI0:
/* 24/48 bytes (Linkage Area)
32/64 bytes (outgoing parameter area, always reserved)
104 bytes (13*8 from FPR)
16/32 bytes (result)
176/232 total bytes */
/* skip over caller save area and keep stack aligned to 16/32. */
stgu r1,-SF_ROUND(176)(r1)
LCFI1:
/* We want to build up an area for the parameters passed
in registers. (both floating point and integer) */
/* 176/256 bytes (callee stack frame aligned to 16/32)
24/48 bytes (caller linkage area)
200/304 (start of caller parameter area aligned to 4/8)
*/
/* Save GPRs 3 - 10 (aligned to 4/8)
in the parents outgoing area. */
stg r3,200(r1)
stg r4,204(r1)
stg r5,208(r1)
stg r6,212(r1)
stg r7,216(r1)
stg r8,220(r1)
stg r9,224(r1)
stg r10,228(r1)
/* Save FPRs 1 - 13. (aligned to 8) */
stfd f1,56(r1)
stfd f2,64(r1)
stfd f3,72(r1)
stfd f4,80(r1)
stfd f5,88(r1)
stfd f6,96(r1)
stfd f7,104(r1)
stfd f8,112(r1)
stfd f9,120(r1)
stfd f10,128(r1)
stfd f11,136(r1)
stfd f12,144(r1)
stfd f13,152(r1)
// Set up registers for the routine that actually does the work.
mr r3,r11 // context pointer from the trampoline
addi r4,r1,160 // result storage
addi r5,r1,200 // saved GPRs
addi r6,r1,56 // saved FPRs
bl Lffi_closure_helper_DARWIN$stub
/* Now r3 contains the return type. Use it to look up in a table
so we know how to deal with each type. */
addi r5,r1,160 // Copy result storage pointer.
bl Lget_ret_type0_addr // Get pointer to Lret_type0 into LR.
mflr r4 // Move to r4.
slwi r3,r3,4 // Multiply return type by 16.
add r3,r3,r4 // Add contents of table to table address.
mtctr r3
bctr
LFE1:
/* Each of the ret_typeX code fragments has to be exactly 16 bytes long
(4 instructions). For cache effectiveness we align to a 16 byte boundary
first. */
.align 4
nop
nop
nop
Lget_ret_type0_addr:
blrl
/* case FFI_TYPE_VOID */
Lret_type0:
b Lfinish
nop
nop
nop
/* case FFI_TYPE_INT */
Lret_type1:
lwz r3,0(r5)
b Lfinish
nop
nop
/* case FFI_TYPE_FLOAT */
Lret_type2:
lfs f1,0(r5)
b Lfinish
nop
nop
/* case FFI_TYPE_DOUBLE */
Lret_type3:
lfd f1,0(r5)
b Lfinish
nop
nop
/* case FFI_TYPE_LONGDOUBLE */
Lret_type4:
lfd f1,0(r5)
lfd f2,8(r5)
b Lfinish
nop
/* case FFI_TYPE_UINT8 */
Lret_type5:
lbz r3,3(r5)
b Lfinish
nop
nop
/* case FFI_TYPE_SINT8 */
Lret_type6:
lbz r3,3(r5)
extsb r3,r3
b Lfinish
nop
/* case FFI_TYPE_UINT16 */
Lret_type7:
lhz r3,2(r5)
b Lfinish
nop
nop
/* case FFI_TYPE_SINT16 */
Lret_type8:
lha r3,2(r5)
b Lfinish
nop
nop
/* case FFI_TYPE_UINT32 */
Lret_type9: // same as Lret_type1
lwz r3,0(r5)
b Lfinish
nop
nop
/* case FFI_TYPE_SINT32 */
Lret_type10: // same as Lret_type1
lwz r3,0(r5)
b Lfinish
nop
nop
/* case FFI_TYPE_UINT64 */
Lret_type11:
lwz r3,0(r5)
lwz r4,4(r5)
b Lfinish
nop
/* case FFI_TYPE_SINT64 */
Lret_type12: // same as Lret_type11
lwz r3,0(r5)
lwz r4,4(r5)
b Lfinish
nop
/* case FFI_TYPE_STRUCT */
Lret_type13:
b Lfinish
nop
nop
nop
/* End 16-byte aligned cases */
/* case FFI_TYPE_POINTER */
// This case assumes that FFI_TYPE_POINTER == FFI_TYPE_LAST. If more types
// are added in future, the following code will need to be updated and
// padded to 16 bytes.
Lret_type14:
lg r3,0(r5)
// fall through
/* case done */
Lfinish:
addi r1,r1,SF_ROUND(176) // Restore stack pointer.
lg r0,SF_RETURN(r1) // Restore return address.
mtlr r0 // Restore link register.
blr
/* END(ffi_closure_ASM) */
.section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support
EH_frame1:
.set L$set$0,LECIE1-LSCIE1
.long L$set$0 .long 0x0 .ascii "zR\0" .byte 0x7c .byte 0x1 .byte 0xc .byte 0x0 LECIE1:
.globl _ffi_closure_ASM.eh
_ffi_closure_ASM.eh:
LSFDE1:
.set L$set$1,LEFDE1-LASFDE1
.long L$set$1 LASFDE1:
.long LASFDE1-EH_frame1 .set L$set$3,LFE1-LFB1
.g_long L$set$3 .byte 0x4 .long L$set$3
.byte 0xe .byte 0x4 .long L$set$4
.byte 0x11 .byte 0x7e
LEFDE1:
.data
.align LOG2_GPR_BYTES
LDFCM0:
.section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32
.align LOG2_GPR_BYTES
Lffi_closure_helper_DARWIN$stub:
.indirect_symbol _ffi_closure_helper_DARWIN
mflr r0
bcl 20,31,LO$ffi_closure_helper_DARWIN
LO$ffi_closure_helper_DARWIN:
mflr r11
addis r11,r11,ha16(L_ffi_closure_helper_DARWIN$lazy_ptr - LO$ffi_closure_helper_DARWIN)
mtlr r0
lgu r12,lo16(L_ffi_closure_helper_DARWIN$lazy_ptr - LO$ffi_closure_helper_DARWIN)(r11)
mtctr r12
bctr
.lazy_symbol_pointer
L_ffi_closure_helper_DARWIN$lazy_ptr:
.indirect_symbol _ffi_closure_helper_DARWIN
.g_long dyld_stub_binding_helper
#endif // __ppc__