diff options
Diffstat (limited to 'libffi/src/powerpc/darwin_closure.S')
| -rw-r--r-- | libffi/src/powerpc/darwin_closure.S | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/libffi/src/powerpc/darwin_closure.S b/libffi/src/powerpc/darwin_closure.S new file mode 100644 index 00000000000..9e54d2231b9 --- /dev/null +++ b/libffi/src/powerpc/darwin_closure.S @@ -0,0 +1,189 @@ +/* ----------------------------------------------------------------------- + darwin_closures.S - Copyright (c) 2002 Free Software Foundation, Inc. + based on ppc_closures.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 +#define JUMPTARGET(name) name +#define L(x) x +.text +.globl _ffi_closure_helper_DARWIN + +.text + .align 2 +.globl _ffi_closure_ASM + +.text + .align 2 +_ffi_closure_ASM: + + mflr r0 /* extract return address */ + stw r0, 8(r1) /* save the return address */ + + /* 24 Bytes (Linkage Area) */ + /* 32 Bytes (outgoing parameter area, always reserved) */ + /* 104 Bytes (13*8 from FPR) */ + /* 4 Bytes (result) + /* 164 Bytes */ + + stwu r1,-164(r1) /* skip over caller save area */ + +/* we want to build up an area for the parameters passed */ +/* in registers (both floating point and integer) */ + + /* we store gpr 3 to gpr 10 (aligned to 4) */ + /* in the parents outgoing area */ + stw r3, 188(r1) + stw r4, 192(r1) + stw r5, 196(r1) + stw r6, 200(r1) + stw r7, 204(r1) + stw r8, 208(r1) + stw r9, 212(r1) + stw r10, 216(r1) + + /* we save fpr 1 to fpr 13 (aligned to 8) */ + stfd f1, 56(r1) + stfd f2, 64(r1) + stfd f3, 72(r1) + stfd f4, 80(r1) + stfd f5, 88(r1) + stfd f6, 96(r1) + stfd f7, 104(r1) + stfd f8, 112(r1) + stfd f9, 120(r1) + stfd f10, 128(r1) + stfd f11, 136(r1) + stfd f12, 144(r1) + stfd f13, 152(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,r1,160 + + /* now load up the pointer to the saved gpr registers */ + addi r5,r1,188 + + /* now load up the pointer to the saved fpr registers */ + addi r6,r1,56 + + /* now load up the pointer to the outgoing parameter */ + /* stack in the previous frame */ + addi r7,r1,220 + + /* make the call */ + bl L(_ffi_closure_helper_DARWIN) + + /* 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,r1,160 /* get pointer to results area */ + addis r4,0,ha16(.L60) /* get address of jump table */ + addi r4,r4,lo16(.L60) + 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 */ + +.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: + + addi r1,r1,164 /* restore stack pointer */ + lwz r0,8(r1) /* get return address */ + mtlr r0 /* reset link register */ + blr + +/* END(ffi_closure_ASM) */ + |