/* -----------------------------------------------------------------------
linux.S - (c) 2003-2004 Randolph Chung <tausq@debian.org>
HPPA Foreign Function Interface
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 CYGNUS SOLUTIONS 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 <fficonfig.h>
#include <ffi.h>
.text
.align 4
/* void ffi_call_LINUX(void (*)(char *, extended_cif *),
extended_cif *ecif,
unsigned bytes,
unsigned flags,
unsigned *rvalue,
void (*fn)())
.export ffi_call_LINUX,code
.import ffi_prep_args_LINUX,code
.type ffi_call_LINUX, @function
.LFB1:
ffi_call_LINUX:
.proc
.callinfo FRAME=64,CALLS,SAVE_RP,SAVE_SP,ENTRY_GR=4
.entry
stw %rp, -20(%sp)
copy %r3, %r1
.LCFI11:
copy %sp, %r3
.LCFI12:
/* Setup the stack for calling prep_args...
We want the stack to look like this:
[ Previous stack ] <- %r3
[ 64-bytes register save area ] <- %r4
[ Stack space for actual call, passed as ] <- %arg0
[ arg0 to ffi_prep_args_LINUX ]
[ Stack for calling prep_args ] <- %sp
*/
stwm %r1, 64(%sp)
stw %r4, 12(%r3)
.LCFI13:
copy %sp, %r4
addl %arg2, %r4, %arg0 /* arg stack */
stw %arg3, -48(%r3) /* save flags /* Call prep_args:
%arg0(stack) -- set up above
%arg1(ecif) -- same as incoming param
%arg2(bytes) -- same as incoming param */
bl ffi_prep_args_LINUX,%r2
ldo 64(%arg0), %sp
ldo -64(%sp), %sp
/* now %sp should point where %arg0 was pointing. */
/* Load the arguments that should be passed in registers
The fp args were loaded by the prep_args function. */
ldw -36(%sp), %arg0
ldw -40(%sp), %arg1
ldw -44(%sp), %arg2
ldw -48(%sp), %arg3
/* in case the function is going to return a structure
we need to give it a place to put the result. */
ldw -52(%r3), %ret0 /* %ret0 <- rvalue */
ldw -56(%r3), %r22 /* %r22 <- function to call */
bl $$dyncall, %r31 /* Call the user function */
copy %r31, %rp
/* Prepare to store the result ldw -52(%r3), %r20 /* r20 <- rvalue */
/* Store the result according to the return type. */
checksmst1:
comib,<>,n FFI_TYPE_SMALL_STRUCT1, %r21, checksmst2
/* There is maybe a better way to handle 3 byte structs. */
sh2add %ret0,0,%ret0
sh2add %ret0,0,%ret0
sh2add %ret0,0,%ret0
sh2add %ret0,0,%ret0
b done
stw %ret0, 0(%r20)
checksmst2:
comib,<>,n FFI_TYPE_SMALL_STRUCT2, %r21, checkint8
/* Up to now I don't have a way to handle 6/7 byte structs.
The values are left bounded in the registers. In the struct
itself they are left bounded. */
stw %ret0, 0(%r20)
b done
stw %ret1, 4(%r20)
checkint8:
comib,<>,n FFI_TYPE_UINT8, %r21, checkint16
b done
stb %ret0, 0(%r20)
checkint16:
comib,<>,n FFI_TYPE_UINT16, %r21, checkint32
b done
sth %ret0, 0(%r20)
checkint32:
comib,<>,n FFI_TYPE_UINT32, %r21, checkint
b done
stw %ret0, 0(%r20)
checkint:
comib,<>,n FFI_TYPE_INT, %r21, checkll
b done
stw %ret0, 0(%r20)
checkll:
comib,<>,n FFI_TYPE_UINT64, %r21, checkdbl
stw %ret0, 0(%r20)
b done
stw %ret1, 4(%r20)
checkdbl:
comib,<>,n FFI_TYPE_DOUBLE, %r21, checkfloat
b done
fstd %fr4,0(%r20)
checkfloat:
comib,<>,n FFI_TYPE_FLOAT, %r21, done
fstw %fr4L,0(%r20)
/* structure returns are either handled by one of the
INT/UINT64 cases above, or, if passed by pointer,
is handled by the callee. */
done:
/* all done, return */
copy %r4, %sp /* pop arg stack */
ldw 12(%r3), %r4
ldwm -64(%sp), %r3 /* .. and pop stack */
ldw -20(%sp), %rp
bv %r0(%rp)
nop
.exit
.procend
.LFE1:
/* void ffi_closure_LINUX(void) .export ffi_closure_LINUX,code
.import ffi_closure_inner_LINUX,code
.type ffi_closure_LINUX, @function
.LFB2:
ffi_closure_LINUX:
.proc
.callinfo FRAME=64,CALLS,SAVE_RP,SAVE_SP,ENTRY_GR=3
.entry
stw %rp, -20(%sp)
.LCFI20:
copy %r3, %r1
.LCFI21:
copy %sp, %r3
.LCFI22:
stwm %r1, 64(%sp)
/* Put arguments onto the stack and call ffi_closure_inner. */
stw %arg0, -36(%r3)
stw %arg1, -40(%r3)
stw %arg2, -44(%r3)
stw %arg3, -48(%r3)
copy %r21, %arg0
bl ffi_closure_inner_LINUX, %r2
copy %r3, %arg1
ldwm -64(%sp), %r3
ldw -20(%sp), %rp
ldw -36(%sp), %ret0
bv %r0(%r2)
ldw -40(%sp), %ret1
.exit
.procend
.LFE2:
.section ".eh_frame",EH_FRAME_FLAGS,@progbits
.Lframe1:
.word .LECIE1-.LSCIE1 .word 0x0 .ascii "\0" .sleb128 4 .byte 0xc .uleb128 0x0
.align 4
.LECIE1:
.LSFDE1:
.word .LEFDE1-.LASFDE1 .word .LASFDE1-.Lframe1 .word .LFE1-.LFB1 .byte 0x4 .byte 0x83 .byte 0x11 .sleb128 -5
.byte 0x4 .byte 0xd
.byte 0x4 .byte 0x84
.align 4
.LEFDE1:
.LSFDE2:
.word .LEFDE2-.LASFDE2 .word .LASFDE2-.Lframe1 .word .LFE2-.LFB2 .word .LCFI21-.LFB2
.byte 0x83 .byte 0x11 .sleb128 -5
.byte 0x4 .byte 0xd
.align 4
.LEFDE2: