/* ----------------------------------------------------------------------- darwin.S - Copyright (c) 2000 John Hornkvist PowerPC Assembly glue. $Id: darwin.S,v 1.1.1.2 2002/03/14 03:59:25 shebs Exp $ 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 #include <ffi.h> #define JUMPTARGET(name) name #define L(x) x .text .align 2 .globl _ffi_prep_args .text .align 2 .globl _ffi_call_DARWIN .text .align 2 _ffi_call_DARWIN: mr r12,r8 // We only need r12 until the call, so it doesn't have to be saved... /* Save the old stack pointer as AP. */ mr r8,r1 /* Allocate the stack space we need. */ stwux r1,r1,r4 /* Save registers we use. */ mflr r9 stw r28,-16(r8) stw r29,-12(r8) stw r30, -8(r8) stw r31, -4(r8) stw r9, 8(r8) stw r2, 20(r1) /* Save arguments over call... */ mr r31,r5 /* flags, */ mr r30,r6 /* rvalue, */ mr r29,r7 /* function address, */ mr r28,r8 /* our AP. */ /* Call ffi_prep_args. */ mr r4,r1 li r9,0 mtctr r12 // r12 holds address of _ffi_prep_args bctrl lwz r2,20(r1) /* Now do the call. */ /* Set up cr1 with bits 4-7 of the flags. */ mtcrf 0x40,r31 /* Get the address to call into CTR. */ mtctr r29 /* Load all those argument registers. */ // We have set up a nice stack frame, just load it into registers. lwz r3, 20+(1*4)(r1) lwz r4, 20+(2*4)(r1) lwz r5, 20+(3*4)(r1) lwz r6, 20+(4*4)(r1) nop lwz r7, 20+(5*4)(r1) lwz r8, 20+(6*4)(r1) lwz r9, 20+(7*4)(r1) lwz r10,20+(8*4)(r1) L1: /* Load all the FP registers. */ bf 6,L2 // 2f + 0x18 lfd f1,-16-(13*8)(r28) lfd f2,-16-(12*8)(r28) lfd f3,-16-(11*8)(r28) lfd f4,-16-(10*8)(r28) nop lfd f5,-16-(9*8)(r28) lfd f6,-16-(8*8)(r28) lfd f7,-16-(7*8)(r28) lfd f8,-16-(6*8)(r28) nop lfd f9,-16-(5*8)(r28) lfd f10,-16-(4*8)(r28) lfd f11,-16-(3*8)(r28) lfd f12,-16-(2*8)(r28) nop lfd f13,-16-(1*8)(r28) L2: mr r12,r29 // Put the target address in r12 as specified. mtctr r12 nop nop /* Make the call. */ bctrl /* Now, deal with the return value. */ mtcrf 0x01,r31 bt 30,L(done_return_value) bt 29,L(fp_return_value) stw r3,0(r30) bf 28,L(done_return_value) stw r4,4(r30) /* Fall through... */ L(done_return_value): /* Restore the registers we used and return. */ lwz r9, 8(r28) lwz r31, -4(r28) mtlr r9 lwz r30, -8(r28) lwz r29,-12(r28) lwz r28,-16(r28) lwz r1,0(r1) blr L(fp_return_value): bf 28,L(float_return_value) stfd f1,0(r30) b L(done_return_value) L(float_return_value): stfs f1,0(r30) b L(done_return_value) //END(_ffi_call_DARWIN) /* Provide a null definition of _ffi_call_AIX. */ .text .align 2 .globl _ffi_call_AIX .text .align 2 _ffi_call_AIX: blr //END(_ffi_call_AIX)