build/libraries/libffi/src/powerpc/ppc_closure.S
/* -----------------------------------------------------------------------
sysv.h - Copyright (c) 2003 Jakub Jelinek <jakub@redhat.com>
Copyright (c) 2008 Red Hat, Inc.
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 AUTHORS OR COPYRIGHT
HOLDERS 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 <fficonfig.h>
#include <ffi.h>
#include <powerpc/asm.h>
.file "ppc_closure.S"
#ifndef POWERPC64
ENTRY(ffi_closure_SYSV)
.LFB1:
stwu %r1,-144(%r1)
.LCFI0:
mflr %r0
.LCFI1:
stw %r0,148(%r1)
# we want to build up an areas for the parameters passed
# in registers (both floating point and integer)
# so first save gpr 3 to gpr 10 (aligned to 4)
stw %r3, 16(%r1)
stw %r4, 20(%r1)
stw %r5, 24(%r1)
stw %r6, 28(%r1)
stw %r7, 32(%r1)
stw %r8, 36(%r1)
stw %r9, 40(%r1)
stw %r10,44(%r1)
#ifndef __NO_FPRS__
# next save fpr 1 to fpr 8 (aligned to 8)
stfd %f1, 48(%r1)
stfd %f2, 56(%r1)
stfd %f3, 64(%r1)
stfd %f4, 72(%r1)
stfd %f5, 80(%r1)
stfd %f6, 88(%r1)
stfd %f7, 96(%r1)
stfd %f8, 104(%r1)
#endif
# set up registers for the routine that actually does the work
# get the context pointer from the trampoline
mr %r3,%r11
# now load up the pointer to the result storage
addi %r4,%r1,112
# now load up the pointer to the saved gpr registers
addi %r5,%r1,16
# now load up the pointer to the saved fpr registers */
addi %r6,%r1,48
# now load up the pointer to the outgoing parameter
# stack in the previous frame
# i.e. the previous frame pointer + 8
addi %r7,%r1,152
# make the call
bl ffi_closure_helper_SYSV@local
.Lret:
# now r3 contains the return type
# so use it to look up in a table
# so we know how to deal with each type
# look up the proper starting point in table
# by using return type as offset
mflr %r4 # move address of .Lret to r4
slwi %r3,%r3,4 # now multiply return type by 16
addi %r4, %r4, .Lret_type0 - .Lret
lwz %r0,148(%r1)
add %r3,%r3,%r4 # add contents of table to table address
mtctr %r3
bctr # jump to it
.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
# case FFI_TYPE_VOID
.Lret_type0:
mtlr %r0
addi %r1,%r1,144
blr
nop
# case FFI_TYPE_INT
lwz %r3,112+0(%r1)
mtlr %r0
.Lfinish:
addi %r1,%r1,144
blr
# case FFI_TYPE_FLOAT
#ifndef __NO_FPRS__
lfs %f1,112+0(%r1)
mtlr %r0
addi %r1,%r1,144
#else
nop
nop
nop
#endif
blr
# case FFI_TYPE_DOUBLE
#ifndef __NO_FPRS__
lfd %f1,112+0(%r1)
mtlr %r0
addi %r1,%r1,144
#else
nop
nop
nop
#endif
blr
# case FFI_TYPE_LONGDOUBLE
#ifndef __NO_FPRS__
lfd %f1,112+0(%r1)
lfd %f2,112+8(%r1)
mtlr %r0
b .Lfinish
#else
nop
nop
nop
blr
#endif
# case FFI_TYPE_UINT8
#ifdef __LITTLE_ENDIAN__
lbz %r3,112+0(%r1)
#else
lbz %r3,112+3(%r1)
#endif
mtlr %r0
addi %r1,%r1,144
blr
# case FFI_TYPE_SINT8
#ifdef __LITTLE_ENDIAN__
lbz %r3,112+0(%r1)
#else
lbz %r3,112+3(%r1)
#endif
extsb %r3,%r3
mtlr %r0
b .Lfinish
# case FFI_TYPE_UINT16
#ifdef __LITTLE_ENDIAN__
lhz %r3,112+0(%r1)
#else
lhz %r3,112+2(%r1)
#endif
mtlr %r0
addi %r1,%r1,144
blr
# case FFI_TYPE_SINT16
#ifdef __LITTLE_ENDIAN__
lha %r3,112+0(%r1)
#else
lha %r3,112+2(%r1)
#endif
mtlr %r0
addi %r1,%r1,144
blr
# case FFI_TYPE_UINT32
lwz %r3,112+0(%r1)
mtlr %r0
addi %r1,%r1,144
blr
# case FFI_TYPE_SINT32
lwz %r3,112+0(%r1)
mtlr %r0
addi %r1,%r1,144
blr
# case FFI_TYPE_UINT64
lwz %r3,112+0(%r1)
lwz %r4,112+4(%r1)
mtlr %r0
b .Lfinish
# case FFI_TYPE_SINT64
lwz %r3,112+0(%r1)
lwz %r4,112+4(%r1)
mtlr %r0
b .Lfinish
# case FFI_TYPE_STRUCT
mtlr %r0
addi %r1,%r1,144
blr
nop
# case FFI_TYPE_POINTER
lwz %r3,112+0(%r1)
mtlr %r0
addi %r1,%r1,144
blr
# case FFI_TYPE_UINT128
lwz %r3,112+0(%r1)
lwz %r4,112+4(%r1)
lwz %r5,112+8(%r1)
b .Luint128
# The return types below are only used when the ABI type is FFI_SYSV.
# case FFI_SYSV_TYPE_SMALL_STRUCT + 1. One byte struct.
lbz %r3,112+0(%r1)
mtlr %r0
addi %r1,%r1,144
blr
# case FFI_SYSV_TYPE_SMALL_STRUCT + 2. Two byte struct.
lhz %r3,112+0(%r1)
mtlr %r0
addi %r1,%r1,144
blr
# case FFI_SYSV_TYPE_SMALL_STRUCT + 3. Three byte struct.
lwz %r3,112+0(%r1)
#ifdef __LITTLE_ENDIAN__
mtlr %r0
addi %r1,%r1,144
blr
#else
srwi %r3,%r3,8
mtlr %r0
b .Lfinish
#endif
# case FFI_SYSV_TYPE_SMALL_STRUCT + 4. Four byte struct.
lwz %r3,112+0(%r1)
mtlr %r0
addi %r1,%r1,144
blr
# case FFI_SYSV_TYPE_SMALL_STRUCT + 5. Five byte struct.
lwz %r3,112+0(%r1)
lwz %r4,112+4(%r1)
#ifdef __LITTLE_ENDIAN__
mtlr %r0
b .Lfinish
#else
li %r5,24
b .Lstruct567
#endif
# case FFI_SYSV_TYPE_SMALL_STRUCT + 6. Six byte struct.
lwz %r3,112+0(%r1)
lwz %r4,112+4(%r1)
#ifdef __LITTLE_ENDIAN__
mtlr %r0
b .Lfinish
#else
li %r5,16
b .Lstruct567
#endif
# case FFI_SYSV_TYPE_SMALL_STRUCT + 7. Seven byte struct.
lwz %r3,112+0(%r1)
lwz %r4,112+4(%r1)
#ifdef __LITTLE_ENDIAN__
mtlr %r0
b .Lfinish
#else
li %r5,8
b .Lstruct567
#endif
# case FFI_SYSV_TYPE_SMALL_STRUCT + 8. Eight byte struct.
lwz %r3,112+0(%r1)
lwz %r4,112+4(%r1)
mtlr %r0
b .Lfinish
#ifndef __LITTLE_ENDIAN__
.Lstruct567:
subfic %r6,%r5,32
srw %r4,%r4,%r5
slw %r6,%r3,%r6
srw %r3,%r3,%r5
or %r4,%r6,%r4
mtlr %r0
addi %r1,%r1,144
blr
#endif
.Luint128:
lwz %r6,112+12(%r1)
mtlr %r0
addi %r1,%r1,144
blr
END(ffi_closure_SYSV)
.section ".eh_frame",EH_FRAME_FLAGS,@progbits
.Lframe1:
.4byte .LECIE1-.LSCIE1 # Length of Common Information Entry
.LSCIE1:
.4byte 0x0 # CIE Identifier Tag
.byte 0x1 # CIE Version
#if defined _RELOCATABLE || defined __PIC__
.ascii "zR\0" # CIE Augmentation
#else
.ascii "\0" # CIE Augmentation
#endif
.uleb128 0x1 # CIE Code Alignment Factor
.sleb128 -4 # CIE Data Alignment Factor
.byte 0x41 # CIE RA Column
#if defined _RELOCATABLE || defined __PIC__
.uleb128 0x1 # Augmentation size
.byte 0x1b # FDE Encoding (pcrel sdata4)
#endif
.byte 0xc # DW_CFA_def_cfa
.uleb128 0x1
.uleb128 0x0
.align 2
.LECIE1:
.LSFDE1:
.4byte .LEFDE1-.LASFDE1 # FDE Length
.LASFDE1:
.4byte .LASFDE1-.Lframe1 # FDE CIE offset
#if defined _RELOCATABLE || defined __PIC__
.4byte .LFB1-. # FDE initial location
#else
.4byte .LFB1 # FDE initial location
#endif
.4byte .LFE1-.LFB1 # FDE address range
#if defined _RELOCATABLE || defined __PIC__
.uleb128 0x0 # Augmentation size
#endif
.byte 0x4 # DW_CFA_advance_loc4
.4byte .LCFI0-.LFB1
.byte 0xe # DW_CFA_def_cfa_offset
.uleb128 144
.byte 0x4 # DW_CFA_advance_loc4
.4byte .LCFI1-.LCFI0
.byte 0x11 # DW_CFA_offset_extended_sf
.uleb128 0x41
.sleb128 -1
.align 2
.LEFDE1:
#if defined __ELF__ && defined __linux__
.section .note.GNU-stack,"",@progbits
#endif
#endif