ppc64-darwin_closure.S [plain text]
#if defined(__ppc64__)
/* -----------------------------------------------------------------------
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 "ppc64-darwin_closure.S"
.text
.align LOG2_GPR_BYTES
.globl _ffi_closure_ASM
.text
.align LOG2_GPR_BYTES
_ffi_closure_ASM:
LFB1:
mflr r0
stg r0,SF_RETURN(r1) // save return address
// Save GPRs 3 - 10 (aligned to 8) in the parents outgoing area.
stg r3,SF_ARG1(r1)
stg r4,SF_ARG2(r1)
stg r5,SF_ARG3(r1)
stg r6,SF_ARG4(r1)
stg r7,SF_ARG5(r1)
stg r8,SF_ARG6(r1)
stg r9,SF_ARG7(r1)
stg r10,SF_ARG8(r1)
LCFI0:
/* 48 bytes (Linkage Area)
64 bytes (outgoing parameter area, always reserved)
112 bytes (14*8 for incoming FPR)
? bytes (result)
112 bytes (14*8 for outgoing FPR)
16 bytes (2 saved registers)
352 + ? total bytes
*/
std r31,-8(r1) // Save registers we use.
std r30,-16(r1)
mr r30,r1 // Save the old SP.
mr r31,r11 // Save the ffi_closure around ffi64_data_size.
// Calculate the space we need.
stdu r1,-SF_MINSIZE(r1)
ld r3,FFI_TRAMPOLINE_SIZE(r31) // ffi_closure->cif*
ld r3,16(r3) // ffi_cif->rtype*
bl Lffi64_data_size$stub
ld r1,0(r1)
addi r3,r3,352 // Add our overhead.
neg r3,r3
li r0,-32 // Align to 32 bytes.
and r3,r3,r0
stdux r1,r1,r3 // Grow the stack.
mr r11,r31 // Copy the ffi_closure back.
LCFI1:
// We want to build up an area for the parameters passed
// in registers. (both floating point and integer)
/* 320 bytes (callee stack frame aligned to 32)
48 bytes (caller linkage area)
368 (start of caller parameter area aligned to 8)
*/
// Save FPRs 1 - 14. (aligned to 8)
stfd f1,112(r1)
stfd f2,120(r1)
stfd f3,128(r1)
stfd f4,136(r1)
stfd f5,144(r1)
stfd f6,152(r1)
stfd f7,160(r1)
stfd f8,168(r1)
stfd f9,176(r1)
stfd f10,184(r1)
stfd f11,192(r1)
stfd f12,200(r1)
stfd f13,208(r1)
stfd f14,216(r1)
// Set up registers for the routine that actually does the work.
mr r3,r11 // context pointer from the trampoline
addi r4,r1,224 // result storage
addi r5,r30,SF_ARG1 // saved GPRs
addi r6,r1,112 // saved FPRs
bl Lffi_closure_helper_DARWIN$stub
// Look the proper starting point in table
// by using return type as an offset.
addi r5,r1,224 // Get pointer to results area.
bl Lget_ret_type0_addr // Get pointer to Lret_type0 into LR.
mflr r4 // Move to r4.
slwi r3,r3,4 // Now 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 r3,4(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 r3,7(r5)
b Lfinish
nop
nop
// case FFI_TYPE_SINT8
Lret_type6:
lbz r3,7(r5)
extsb r3,r3
b Lfinish
nop
// case FFI_TYPE_UINT16
Lret_type7:
lhz r3,6(r5)
b Lfinish
nop
nop
// case FFI_TYPE_SINT16
Lret_type8:
lha r3,6(r5)
b Lfinish
nop
nop
// case FFI_TYPE_UINT32
Lret_type9: // same as Lret_type1
lwz r3,4(r5)
b Lfinish
nop
nop
// case FFI_TYPE_SINT32
Lret_type10: // same as Lret_type1
lwz r3,4(r5)
b Lfinish
nop
nop
// case FFI_TYPE_UINT64
Lret_type11:
ld r3,0(r5)
b Lfinish
nop
nop
// case FFI_TYPE_SINT64
Lret_type12: // same as Lret_type11
ld r3,0(r5)
b Lfinish
nop
nop
// case FFI_TYPE_STRUCT
Lret_type13:
b Lret_struct
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)
b Lfinish
// copy struct into registers
Lret_struct:
ld r31,FFI_TRAMPOLINE_SIZE(r31) // ffi_closure->cif*
ld r3,16(r31) // ffi_cif->rtype*
ld r31,24(r31) // ffi_cif->flags
mr r4,r5 // copy struct* to 2nd arg
addi r7,r1,SF_ARG9 // GPR return area
addi r9,r30,-16-(14*8) // FPR return area
li r5,0 // struct offset ptr (NULL)
li r6,0 // FPR used count ptr (NULL)
li r8,0 // GPR return area size ptr (NULL)
li r10,0 // FPR return area size ptr (NULL)
bl Lffi64_struct_to_reg_form$stub
// Load GPRs
ld r3,SF_ARG9(r1)
ld r4,SF_ARG10(r1)
ld r5,SF_ARG11(r1)
ld r6,SF_ARG12(r1)
nop
ld r7,SF_ARG13(r1)
ld r8,SF_ARG14(r1)
ld r9,SF_ARG15(r1)
ld r10,SF_ARG16(r1)
nop
// Load FPRs
mtcrf 0x2,r31
bf 26,Lfinish
lfd f1,-16-(14*8)(r30)
lfd f2,-16-(13*8)(r30)
lfd f3,-16-(12*8)(r30)
lfd f4,-16-(11*8)(r30)
nop
lfd f5,-16-(10*8)(r30)
lfd f6,-16-(9*8)(r30)
lfd f7,-16-(8*8)(r30)
lfd f8,-16-(7*8)(r30)
nop
lfd f9,-16-(6*8)(r30)
lfd f10,-16-(5*8)(r30)
lfd f11,-16-(4*8)(r30)
lfd f12,-16-(3*8)(r30)
nop
lfd f13,-16-(2*8)(r30)
lfd f14,-16-(1*8)(r30)
// Fall through
// case done
Lfinish:
lg r1,0(r1) // Restore stack pointer.
ld r31,-8(r1) // Restore registers we used.
ld r30,-16(r1)
lg r0,SF_RETURN(r1) // Get return address.
mtlr r0 // Reset link register.
blr
// END(ffi_closure_ASM)
.section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support
EH_frame1:
.set L$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$lazy_ptr:
.indirect_symbol _ffi_closure_helper_DARWIN
.g_long dyld_stub_binding_helper
.data
.align LOG2_GPR_BYTES
LLFB1$non_lazy_ptr:
.g_long LFB1
.section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32
.align LOG2_GPR_BYTES
Lffi64_struct_to_reg_form$stub:
.indirect_symbol _ffi64_struct_to_reg_form
mflr r0
bcl 20,31,LO$ffi64_struct_to_reg_form
LO$ffi64_struct_to_reg_form:
mflr r11
addis r11,r11,ha16(L_ffi64_struct_to_reg_form$lazy_ptr - LO$ffi64_struct_to_reg_form)
mtlr r0
lgu r12,lo16(L_ffi64_struct_to_reg_form$lazy_ptr - LO$ffi64_struct_to_reg_form)(r11)
mtctr r12
bctr
.section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32
.align LOG2_GPR_BYTES
Lffi64_data_size$stub:
.indirect_symbol _ffi64_data_size
mflr r0
bcl 20,31,LO$ffi64_data_size
LO$ffi64_data_size:
mflr r11
addis r11,r11,ha16(L_ffi64_data_size$lazy_ptr - LO$ffi64_data_size)
mtlr r0
lgu r12,lo16(L_ffi64_data_size$lazy_ptr - LO$ffi64_data_size)(r11)
mtctr r12
bctr
.lazy_symbol_pointer
L_ffi64_struct_to_reg_form$lazy_ptr:
.indirect_symbol _ffi64_struct_to_reg_form
.g_long dyld_stub_binding_helper
L_ffi64_data_size$lazy_ptr:
.indirect_symbol _ffi64_data_size
.g_long dyld_stub_binding_helper
#endif // __ppc64__