blob: 29bf8e452b4619d33edd47d14e77f611c141b67e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
//
// Copyright (c) 2016 - 2017, ARM Limited. All rights reserved.
//
// This program and the accompanying materials
// are licensed and made available under the terms and conditions of the BSD License
// which accompanies this distribution. The full text of the license may be found at
// http://opensource.org/licenses/bsd-license.php
//
// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
//
//
.text
.align 3
GCC_ASM_EXPORT(ArmCallSvc)
ASM_PFX(ArmCallSvc):
// r0 will be popped just after the SVC call
push {r0, r4-r8}
// Load the SVC arguments values into the appropriate registers
ldm r0, {r0-r7}
svc #0
// Load the ARM_SVC_ARGS structure address from the stack into r8
ldr r8, [sp]
// Load the SVC returned values into the appropriate registers
// A SVC call can return up to 4 values - we do not need to store back r4-r7.
stm r8, {r0-r3}
mov r0, r8
// Restore the registers r4-r8
pop {r1, r4-r8}
bx lr
|
