/* ----------------------------------------------------------------------- sysv.h - Copyright (c) 2003 Jakub Jelinek 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 #include #include .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 lfs %f1,112+0(%r1) mtlr %r0 addi %r1,%r1,144 blr # case FFI_TYPE_DOUBLE lfd %f1,112+0(%r1) mtlr %r0 addi %r1,%r1,144 blr # case FFI_TYPE_LONGDOUBLE lfd %f1,112+0(%r1) lfd %f2,112+8(%r1) mtlr %r0 b .Lfinish # case FFI_TYPE_UINT8 lbz %r3,112+3(%r1) mtlr %r0 addi %r1,%r1,144 blr # case FFI_TYPE_SINT8 lbz %r3,112+3(%r1) extsb %r3,%r3 mtlr %r0 b .Lfinish # case FFI_TYPE_UINT16 lhz %r3,112+2(%r1) mtlr %r0 addi %r1,%r1,144 blr # case FFI_TYPE_SINT16 lha %r3,112+2(%r1) 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) bl .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) srwi %r3,%r3,8 mtlr %r0 b .Lfinish # 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) li %r5,24 b .Lstruct567 # case FFI_SYSV_TYPE_SMALL_STRUCT + 6. Six byte struct. lwz %r3,112+0(%r1) lwz %r4,112+4(%r1) li %r5,16 b .Lstruct567 # case FFI_SYSV_TYPE_SMALL_STRUCT + 7. Seven byte struct. lwz %r3,112+0(%r1) lwz %r4,112+4(%r1) li %r5,8 b .Lstruct567 # case FFI_SYSV_TYPE_SMALL_STRUCT + 8. Eight byte struct. lwz %r3,112+0(%r1) lwz %r4,112+4(%r1) mtlr %r0 b .Lfinish .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 .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: #endif #if defined __ELF__ && defined __linux__ .section .note.GNU-stack,"",@progbits #endif