/* ———————————————————————–
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 “internal.h” include <powerpc/asm.h>
.file "ppc_closure.S"
ifndef POWERPC64
FFI_HIDDEN(ffi_closure_SYSV) ENTRY(ffi_closure_SYSV)
.cfi_startproc stwu %r1,-144(%r1) .cfi_def_cfa_offset 144 mflr %r0 stw %r0,148(%r1) .cfi_offset 65, 4
# 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) # set up registers for the routine that does the work # closure->cif lwz %r3,FFI_TRAMPOLINE_SIZE(%r11) # closure->fun lwz %r4,FFI_TRAMPOLINE_SIZE+4(%r11) # closure->user_data lwz %r5,FFI_TRAMPOLINE_SIZE+8(%r11)
.Ldoclosure:
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
# pointer to the result storage addi %r6,%r1,112 # pointer to the saved gpr registers addi %r7,%r1,16 # pointer to the saved fpr registers addi %r8,%r1,48 # pointer to the outgoing parameter save area in the previous frame # i.e. the previous frame pointer + 8 addi %r9,%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
# 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 .cfi_def_cfa_offset 0 blr .cfi_def_cfa_offset 144 nop
# case FFI_TYPE_INT
lwz %r3,112+0(%r1) mtlr %r0
.Lfinish:
addi %r1,%r1,144 .cfi_def_cfa_offset 0 blr .cfi_def_cfa_offset 144
# case FFI_TYPE_FLOAT ifndef NO_FPRS
lfs %f1,112+0(%r1)
else
nop
endif
mtlr %r0 addi %r1,%r1,144 .cfi_def_cfa_offset 0 blr .cfi_def_cfa_offset 144
# case FFI_TYPE_DOUBLE ifndef NO_FPRS
lfd %f1,112+0(%r1)
else
nop
endif
mtlr %r0 addi %r1,%r1,144 .cfi_def_cfa_offset 0 blr .cfi_def_cfa_offset 144
# case FFI_TYPE_LONGDOUBLE ifndef NO_FPRS
lfd %f1,112+0(%r1) lfd %f2,112+8(%r1) mtlr %r0 b .Lfinish
else
mtlr %r0 addi %r1,%r1,144 .cfi_def_cfa_offset 0 blr .cfi_def_cfa_offset 144 nop
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 .cfi_def_cfa_offset 0 blr .cfi_def_cfa_offset 144
# 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 .cfi_def_cfa_offset 0 blr .cfi_def_cfa_offset 144
# 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 .cfi_def_cfa_offset 0 blr .cfi_def_cfa_offset 144
# case FFI_TYPE_UINT32
lwz %r3,112+0(%r1) mtlr %r0 addi %r1,%r1,144 .cfi_def_cfa_offset 0 blr .cfi_def_cfa_offset 144
# case FFI_TYPE_SINT32
lwz %r3,112+0(%r1) mtlr %r0 addi %r1,%r1,144 .cfi_def_cfa_offset 0 blr .cfi_def_cfa_offset 144
# 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 .cfi_def_cfa_offset 0 blr .cfi_def_cfa_offset 144 nop
# case FFI_TYPE_POINTER
lwz %r3,112+0(%r1) mtlr %r0 addi %r1,%r1,144 .cfi_def_cfa_offset 0 blr .cfi_def_cfa_offset 144
# 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 .cfi_def_cfa_offset 0 blr .cfi_def_cfa_offset 144
# case FFI_SYSV_TYPE_SMALL_STRUCT + 2. Two byte struct.
lhz %r3,112+0(%r1) mtlr %r0 addi %r1,%r1,144 .cfi_def_cfa_offset 0 blr .cfi_def_cfa_offset 144
# case FFI_SYSV_TYPE_SMALL_STRUCT + 3. Three byte struct.
lwz %r3,112+0(%r1)
ifdef LITTLE_ENDIAN
mtlr %r0 addi %r1,%r1,144 .cfi_def_cfa_offset 0 blr .cfi_def_cfa_offset 144
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 .cfi_def_cfa_offset 0 blr .cfi_def_cfa_offset 144
# 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 .cfi_def_cfa_offset 0 blr .cfi_def_cfa_offset 144
endif
.Luint128:
lwz %r6,112+12(%r1) mtlr %r0 addi %r1,%r1,144 .cfi_def_cfa_offset 0 blr .cfi_endproc
END(ffi_closure_SYSV)
FFI_HIDDEN(ffi_go_closure_sysv) ENTRY(ffi_go_closure_sysv)
.cfi_startproc stwu %r1,-144(%r1) .cfi_def_cfa_offset 144 mflr %r0 stw %r0,148(%r1) .cfi_offset 65, 4 stw %r3, 16(%r1) stw %r4, 20(%r1) stw %r5, 24(%r1) # closure->cif lwz %r3,4(%r11) # closure->fun lwz %r4,8(%r11) # user_data mr %r5,%r11 b .Ldoclosure .cfi_endproc
END(ffi_go_closure_sysv)
ifdef FFI_EXEC_STATIC_TRAMP
.text .align PPC_TRAMP_MAP_SHIFT FFI_HIDDEN (trampoline_code_table) .globl trampoline_code_table .type trampoline_code_table,@function
trampoline_code_table:
.rept PPC_TRAMP_MAP_SIZE / PPC_TRAMP_SIZE mflr %r0 bcl 20,31,$+4 mflr %r11 addis %r11,%r11,PPC_TRAMP_MAP_SIZE@ha mtlr %r0 lwz %r0,(PPC_TRAMP_MAP_SIZE-4)@l(%r11) mtctr %r0 lwz %r11,(PPC_TRAMP_MAP_SIZE-8)@l(%r11) bctr nop .endr .size trampoline_code_table,.-trampoline_code_table .align PPC_TRAMP_MAP_SHIFT
endif /* FFI_EXEC_STATIC_TRAMP */
if defined __ELF__ && defined __linux__
.section .note.GNU-stack,"",@progbits
endif endif