1 /* -----------------------------------------------------------------------
2 sysv.S - Copyright (c) 1998 Red Hat, Inc.
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 ----------------------------------------------------------------------- */
27 #include <fficonfig.h>
29 #ifdef HAVE_MACHINE_ASM_H
30 #include <machine/asm.h>
32 #ifdef __USER_LABEL_PREFIX__
33 #define CONCAT1(a, b) CONCAT2(a, b)
34 #define CONCAT2(a, b) a ## b
36 /* Use the right prefix for global labels. */
37 #define CNAME(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
41 #define ENTRY(x) .globl CNAME(x); .type CNAME(x),%function; CNAME(x):
50 /* We need a better way of testing for this, but for now, this is all
52 @ This selects the minimum architecture level required.
53 #define __ARM_ARCH__ 3
55 #if defined(__ARM_ARCH_4__) || defined(__ARM_ARCH_4T__)
57 # define __ARM_ARCH__ 4
60 #if defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5T__) \
61 || defined(__ARM_ARCH_5E__) || defined(__ARM_ARCH_5TE__) \
62 || defined(__ARM_ARCH_5TEJ__)
64 # define __ARM_ARCH__ 5
67 #if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) \
68 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) \
69 || defined(__ARM_ARCH_6ZK__)
71 # define __ARM_ARCH__ 6
75 # define call_reg(x) blx x
76 #elif defined (__ARM_ARCH_4T__)
77 # define call_reg(x) mov lr, pc ; bx x
78 # if defined(__thumb__) || defined(__THUMB_INTERWORK__)
79 # define __INTERWORKING__
82 # define call_reg(x) mov lr, pc ; mov pc, x
85 #if defined(__thumb__) && !defined(__THUMB_INTERWORK__)
86 .macro ARM_FUNC_START name
95 /* A hook to tell gdb that we've switched to ARM mode. Also used to call
96 directly from other local arm routines. */
100 .macro ARM_FUNC_START name
108 .macro RETLDM regs=, cond=, dirn=ia
109 #if defined (__INTERWORKING__)
111 ldr\cond lr, [sp], #4
113 ldm\cond\dirn sp!, {\regs, lr}
118 ldr\cond pc, [sp], #4
120 ldm\cond\dirn sp!, {\regs, pc}
133 @ This assumes we are using gas.
134 ARM_FUNC_START ffi_call_SYSV
136 stmfd sp!, {r0-r3, fp, lr}
139 @ Make room for all of the new args.
142 @ Place all of the ffi_prep_args in position
147 @ Call ffi_prep_args(stack, &ecif)
150 @ move first 4 parameters in registers
163 @ Remove the space we pushed for the args
166 @ Load r2 with the pointer to storage for the return value
169 @ Load r3 with the return type code
172 @ If the return value pointer is NULL, assume no return value.
177 cmp r3, #FFI_TYPE_INT
179 cmpne r3, #FFI_TYPE_FLOAT
185 cmp r3, #FFI_TYPE_SINT64
187 cmpne r3, #FFI_TYPE_DOUBLE
195 cmp r3, #FFI_TYPE_FLOAT
199 @ return DOUBLE or LONGDOUBLE
200 cmp r3, #FFI_TYPE_DOUBLE
208 .size CNAME(ffi_call_SYSV),.ffi_call_SYSV_end-CNAME(ffi_call_SYSV)
211 unsigned int FFI_HIDDEN
212 ffi_closure_SYSV_inner (closure, respp, args)
213 ffi_closure *closure;
218 ARM_FUNC_START ffi_closure_SYSV
225 bl ffi_closure_SYSV_inner
226 cmp r0, #FFI_TYPE_INT
228 cmp r0, #FFI_TYPE_FLOAT
230 cmp r0, #FFI_TYPE_DOUBLE
232 cmp r0, #FFI_TYPE_LONGDOUBLE
234 cmp r0, #FFI_TYPE_SINT64
255 .ffi_closure_SYSV_end:
256 .size CNAME(ffi_closure_SYSV),.ffi_closure_SYSV_end-CNAME(ffi_closure_SYSV)