diff options
Diffstat (limited to 'libffi/src/powerpc/ppc_closure.S')
| -rw-r--r-- | libffi/src/powerpc/ppc_closure.S | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/libffi/src/powerpc/ppc_closure.S b/libffi/src/powerpc/ppc_closure.S new file mode 100644 index 00000000000..a9ea9c7ee52 --- /dev/null +++ b/libffi/src/powerpc/ppc_closure.S @@ -0,0 +1,181 @@ +#define LIBFFI_ASM +#include <powerpc/asm.h> + +.globl ffi_closure_helper_SYSV + +ENTRY(ffi_closure_SYSV) +.LFB1: + stwu %r1,-144(%r1) +.LCFI0: + mflr %r0 + stw %r31,140(%r1) +.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) + + # 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) + + # 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 JUMPTARGET(ffi_closure_helper_SYSV) + + # 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 + addi %r5,%r1,112 # get pointer to results area + addis %r4,0,.L60@ha # get address of jump table + addi %r4,%r4,.L60@l + slwi %r3,%r3,2 # now multiply return type by 4 + lwzx %r3,%r4,%r3 # get the contents of that table value + add %r3,%r3,%r4 # add contents of table to table address + mtctr %r3 + bctr # jump to it +.LFE1: + .align 2 +.L60: + .long .L44-.L60 # FFI_TYPE_VOID + .long .L50-.L60 # FFI_TYPE_INT + .long .L47-.L60 # FFI_TYPE_FLOAT + .long .L46-.L60 # FFI_TYPE_DOUBLE + .long .L46-.L60 # FFI_TYPE_LONGDOUBLE + .long .L56-.L60 # FFI_TYPE_UINT8 + .long .L55-.L60 # FFI_TYPE_SINT8 + .long .L58-.L60 # FFI_TYPE_UINT16 + .long .L57-.L60 # FFI_TYPE_SINT16 + .long .L50-.L60 # FFI_TYPE_UINT32 + .long .L50-.L60 # FFI_TYPE_SINT32 + .long .L48-.L60 # FFI_TYPE_UINT64 + .long .L48-.L60 # FFI_TYPE_SINT64 + .long .L44-.L60 # FFI_TYPE_STRUCT + .long .L50-.L60 # FFI_TYPE_POINTER + + +# case double +.L46: + lfd %f1,0(%r5) + b .L44 + +# case float +.L47: + lfs %f1,0(%r5) + b .L44 + +# case long long +.L48: + lwz %r3,0(%r5) + lwz %r4,4(%r5) + b .L44 + +# case default / int32 / pointer +.L50: + lwz %r3,0(%r5) + b .L44 + +# case signed int8 +.L55: + addi %r5,%r5,3 + lbz %r3,0(%r5) + extsb %r3,%r3 + b .L44 + +# case unsigned int8 +.L56: + addi %r5,%r5,3 + lbz %r3,0(%r5) + b .L44 + +# case signed int16 +.L57: + addi %r5,%r5,2 + lhz %r3,0(%r5) + extsh %r3,%r3 + b .L44 + +#case unsigned int16 +.L58: + addi %r5,%r5,2 + lhz %r3,0(%r5) + +# case void / done +.L44: + + lwz %r11,0(%r1) + lwz %r0,4(%r11) + mtlr %r0 + lwz %r31,-4(%r11) + mr %r1,%r11 + blr +END(ffi_closure_SYSV) + + .section ".eh_frame","aw" +__FRAME_BEGIN__: + .4byte .LECIE1-.LSCIE1 # Length of Common Information Entry +.LSCIE1: + .4byte 0x0 # CIE Identifier Tag + .byte 0x1 # CIE Version + .ascii "\0" # CIE Augmentation + .byte 0x1 # uleb128 0x1; CIE Code Alignment Factor + .byte 0x7c # sleb128 -4; CIE Data Alignment Factor + .byte 0x41 # CIE RA Column + .byte 0xc # DW_CFA_def_cfa + .byte 0x1 # uleb128 0x1 + .byte 0x0 # uleb128 0x0 + .align 2 +.LECIE1: +.LSFDE1: + .4byte .LEFDE1-.LASFDE1 # FDE Length +.LASFDE1: + .4byte .LASFDE1-__FRAME_BEGIN__ # FDE CIE offset + .4byte .LFB1 # FDE initial location + .4byte .LFE1-.LFB1 # FDE address range + .byte 0x4 # DW_CFA_advance_loc4 + .4byte .LCFI0-.LFB1 + .byte 0xe # DW_CFA_def_cfa_offset + .byte 144,1 # uleb128 144 + .byte 0x4 # DW_CFA_advance_loc4 + .4byte .LCFI1-.LCFI0 + .byte 0x2f # DW_CFA_GNU_negative_offset_extended + .byte 0x41 # uleb128 0x41 + .byte 0x1 # uleb128 0x1 + .align 2 +.LEFDE1: |