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/* -----------------------------------------------------------------------
aix.S - Copyright (c) 2002 Free Software Foundation, Inc.
based on darwin.S by John Hornkvist
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.
----------------------------------------------------------------------- */
.set r0,0
.set r1,1
.set r2,2
.set r3,3
.set r4,4
.set r5,5
.set r6,6
.set r7,7
.set r8,8
.set r9,9
.set r10,10
.set r11,11
.set r12,12
.set r13,13
.set r14,14
.set r15,15
.set r16,16
.set r17,17
.set r18,18
.set r19,19
.set r20,20
.set r21,21
.set r22,22
.set r23,23
.set r24,24
.set r25,25
.set r26,26
.set r27,27
.set r28,28
.set r29,29
.set r30,30
.set r31,31
.set f0,0
.set f1,1
.set f2,2
.set f3,3
.set f4,4
.set f5,5
.set f6,6
.set f7,7
.set f8,8
.set f9,9
.set f10,10
.set f11,11
.set f12,12
.set f13,13
.set f14,14
.set f15,15
.set f16,16
.set f17,17
.set f18,18
.set f19,19
.set f20,20
.set f21,21
#define LIBFFI_ASM
#include <fficonfig.h>
#include <ffi.h>
#define JUMPTARGET(name) name
#define L(x) x
.file "aix.S"
.toc
.csect .text[PR]
.align 2
.globl ffi_prep_args
.csect .text[PR]
.align 2
.globl ffi_call_AIX
.globl .ffi_call_AIX
.csect ffi_call_AIX[DS]
ffi_call_AIX:
.long .ffi_call_AIX, TOC[tc0], 0
.csect .text[PR]
.ffi_call_AIX:
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
lwz r2,4(r12)
lwz r12,0(r12)
mtctr r12 // r12 holds address of _ffi_prep_args
bctrl
lwz r2,20(r1)
/* Now do the call. */
lwz r12,0(r29)
/* Set up cr1 with bits 4-7 of the flags. */
mtcrf 0x40,r31
stw r2,20(r1)
mtctr r12
lwz r2,4(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:
/* Make the call. */
bctrl
lwz r2,20(r1)
/* 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)
.long 0
.byte 0,0,0,1,128,4,0,0
//END(ffi_call_AIX)
.csect .text[PR]
.align 2
.globl ffi_call_DARWIN
.globl .ffi_call_DARWIN
.csect ffi_call_DARWIN[DS]
ffi_call_DARWIN:
.long .ffi_call_DARWIN, TOC[tc0], 0
.csect .text[PR]
.ffi_call_DARWIN:
blr
.long 0
.byte 0,0,0,0,0,0,0,0
//END(ffi_call_DARWIN)
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