1 /* -----------------------------------------------------------------------
2 sysv.S - Copyright (c) 1998 Cygnus Solutions
4 ARM Foreign Function Interface
6 Permission is hereby granted, free of charge, to any person obtaining
7 a copy of this software and associated documentation files (the
8 ``Software''), to deal in the Software without restriction, including
9 without limitation the rights to use, copy, modify, merge, publish,
10 distribute, sublicense, and/or sell copies of the Software, and to
11 permit persons to whom the Software is furnished to do so, subject to
12 the following conditions:
14 The above copyright notice and this permission notice shall be included
15 in all copies or substantial portions of the Software.
17 THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 IN NO EVENT SHALL CYGNUS SOLUTIONS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 OTHER DEALINGS IN THE SOFTWARE.
24 ----------------------------------------------------------------------- */
28 #ifdef HAVE_MACHINE_ASM_H
29 #include <machine/asm.h>
31 #ifdef __USER_LABEL_PREFIX__
32 #define CONCAT1(a, b) CONCAT2(a, b)
33 #define CONCAT2(a, b) a ## b
35 /* Use the right prefix for global labels. */
36 #define CNAME(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
40 #define ENTRY(x) .globl CNAME(x); .type CNAME(x),%function; CNAME(x):
52 # This assumes we are using gas.
55 stmfd sp!, {a1-a4, fp, lr}
58 # Make room for all of the new args.
61 # Place all of the ffi_prep_args in position
70 # move first 4 parameters in registers
86 # Remove the space we pushed for the args
89 # Load a3 with the pointer to storage for the return value
92 # Load a4 with the return type code
95 # If the return value pointer is NULL, assume no return value.
100 cmp a4, #FFI_TYPE_INT
105 cmp a4, #FFI_TYPE_FLOAT
113 # return DOUBLE or LONGDOUBLE
114 cmp a4, #FFI_TYPE_DOUBLE
122 ldmfd sp!, {a1-a4, fp, pc}
125 .size CNAME(ffi_call_SYSV),.ffi_call_SYSV_end-CNAME(ffi_call_SYSV)