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/* -----------------------------------------------------------------------
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aix_closure.S - Copyright (c) 2002 2003 Free Software Foundation, Inc.
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based on darwin_closure.S
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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``Software''), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR
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OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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----------------------------------------------------------------------- */
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#define JUMPTARGET(name) name
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.globl ffi_closure_ASM
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.globl .ffi_closure_ASM
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.csect ffi_closure_ASM[DS]
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.long .ffi_closure_ASM, TOC[tc0], 0
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mflr r0 /* extract return address */
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stw r0, 8(r1) /* save the return address */
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/* 24 Bytes (Linkage Area) */
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/* 32 Bytes (params) */
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/* 104 Bytes (13*8 from FPR) */
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/* 8 Bytes (result) */
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stwu r1,-176(r1) /* skip over caller save area
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keep stack aligned to 16 */
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/* we want to build up an area for the parameters passed */
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/* in registers (both floating point and integer) */
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/* we store gpr 3 to gpr 10 (aligned to 4)
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in the parents outgoing area */
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/* next save fpr 1 to fpr 13 (aligned to 8) */
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/* set up registers for the routine that actually does the work */
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/* get the context pointer from the trampoline */
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/* now load up the pointer to the result storage */
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/* now load up the pointer to the saved gpr registers */
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/* now load up the pointer to the saved fpr registers */
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bl .ffi_closure_helper_DARWIN
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/* now r3 contains the return type */
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/* so use it to look up in a table */
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/* so we know how to deal with each type */
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/* look up the proper starting point in table */
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/* by using return type as offset */
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addi r5,r1,160 /* get pointer to results area */
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lwz r4,LC..60(2) /* get address of jump table */
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slwi r3,r3,2 /* now multiply return type by 4 */
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lwzx r3,r4,r3 /* get the contents of that table value */
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add r3,r3,r4 /* add contents of table to table address */
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bctr /* jump to it */
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.long L..44-L..60 /* FFI_TYPE_VOID */
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.long L..50-L..60 /* FFI_TYPE_INT */
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.long L..47-L..60 /* FFI_TYPE_FLOAT */
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.long L..46-L..60 /* FFI_TYPE_DOUBLE */
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.long L..46-L..60 /* FFI_TYPE_LONGDOUBLE */
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.long L..56-L..60 /* FFI_TYPE_UINT8 */
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.long L..55-L..60 /* FFI_TYPE_SINT8 */
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.long L..58-L..60 /* FFI_TYPE_UINT16 */
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.long L..57-L..60 /* FFI_TYPE_SINT16 */
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.long L..50-L..60 /* FFI_TYPE_UINT32 */
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.long L..50-L..60 /* FFI_TYPE_SINT32 */
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.long L..48-L..60 /* FFI_TYPE_UINT64 */
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.long L..48-L..60 /* FFI_TYPE_SINT64 */
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.long L..44-L..60 /* FFI_TYPE_STRUCT */
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.long L..50-L..60 /* FFI_TYPE_POINTER */
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/* case default / int32 / pointer */
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/* case signed int8 */
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/* case unsigned int8 */
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/* case signed int16 */
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/* case unsigned int16 */
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/* case void / done */
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addi r1,r1,176 /* restore stack pointer */
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lwz r0,8(r1) /* get return address */
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mtlr r0 /* reset link register */
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/* END(ffi_closure_ASM) */
added
removed
libffi/src/powerpc/aix_closure.S
