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diff --git a/lib/chibios/os/common/startup/ARMCMx-SB/compilers/GCC/crt0.S b/lib/chibios/os/common/startup/ARMCMx-SB/compilers/GCC/crt0.S
new file mode 100644
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1/*
2 ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
3
4 Licensed under the Apache License, Version 2.0 (the "License");
5 you may not use this file except in compliance with the License.
6 You may obtain a copy of the License at
7
8 http://www.apache.org/licenses/LICENSE-2.0
9
10 Unless required by applicable law or agreed to in writing, software
11 distributed under the License is distributed on an "AS IS" BASIS,
12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 See the License for the specific language governing permissions and
14 limitations under the License.
15*/
16
17/**
18 * @file crt0.S
19 * @brief Generic ARMv7-M sandbox startup file for ChibiOS.
20 *
21 * @addtogroup ARMCMx_GCC_STARTUP_V7M_SB
22 * @{
23 */
24
25/*===========================================================================*/
26/* Module constants. */
27/*===========================================================================*/
28
29#if !defined(FALSE) || defined(__DOXYGEN__)
30#define FALSE 0
31#endif
32
33#if !defined(TRUE) || defined(__DOXYGEN__)
34#define TRUE 1
35#endif
36
37/*===========================================================================*/
38/* Module pre-compile time settings. */
39/*===========================================================================*/
40
41/**
42 * @brief Stack segments initialization switch.
43 */
44#if !defined(CRT0_STACKS_FILL_PATTERN) || defined(__DOXYGEN__)
45#define CRT0_STACKS_FILL_PATTERN 0x55555555
46#endif
47
48/**
49 * @brief Stack segments initialization switch.
50 */
51#if !defined(CRT0_INIT_STACKS) || defined(__DOXYGEN__)
52#define CRT0_INIT_STACKS TRUE
53#endif
54
55/**
56 * @brief DATA segment initialization switch.
57 */
58#if !defined(CRT0_INIT_DATA) || defined(__DOXYGEN__)
59#define CRT0_INIT_DATA TRUE
60#endif
61
62/**
63 * @brief BSS segment initialization switch.
64 */
65#if !defined(CRT0_INIT_BSS) || defined(__DOXYGEN__)
66#define CRT0_INIT_BSS TRUE
67#endif
68
69/**
70 * @brief Constructors invocation switch.
71 */
72#if !defined(CRT0_CALL_CONSTRUCTORS) || defined(__DOXYGEN__)
73#define CRT0_CALL_CONSTRUCTORS TRUE
74#endif
75
76/**
77 * @brief Destructors invocation switch.
78 */
79#if !defined(CRT0_CALL_DESTRUCTORS) || defined(__DOXYGEN__)
80#define CRT0_CALL_DESTRUCTORS TRUE
81#endif
82
83/*===========================================================================*/
84/* Code section. */
85/*===========================================================================*/
86
87#if !defined(__DOXYGEN__)
88
89 .syntax unified
90 .cpu cortex-m3
91
92 .thumb
93
94 .section .sandbox, "ax"
95 .align 4
96 .globl _sandbox
97_sandbox: .long 0xFE9154C0
98 .long 0x0C4519EF
99 .long 16
100 .long 0
101 b _crt0_entry
102
103 .text
104/*
105 * CRT0 entry point.
106 */
107 .align 2
108 .thumb_func
109 .global _crt0_entry
110_crt0_entry:
111
112 /* PSP stack pointers initialization.*/
113 ldr r0, =__user_psp_end__
114 msr PSP, r0
115
116#if CRT0_INIT_STACKS == TRUE
117 /* User process Stack initialization. Note, it assumes that the
118 stack size is a multiple of 4 so the linker file must
119 ensure this.*/
120 ldr r0, =CRT0_STACKS_FILL_PATTERN
121 ldr r1, =__user_psp_base__
122 ldr r2, =__user_psp_end__
123upsloop:
124 cmp r1, r2
125 itt lo
126 strlo r0, [r1], #4
127 blo upsloop
128#endif /* CRT0_INIT_STACKS == TRUE */
129
130#if CRT0_INIT_DATA == TRUE
131 /* Data initialization. Note, it assumes that the DATA size
132 is a multiple of 4 so the linker file must ensure this.*/
133 ldr r1, =__textdata_base__
134 ldr r2, =__data_base__
135 ldr r3, =__data_end__
136dloop:
137 cmp r2, r3
138 ittt lo
139 ldrlo r0, [r1], #4
140 strlo r0, [r2], #4
141 blo dloop
142#endif /* CRT0_INIT_DATA == TRUE */
143
144#if CRT0_INIT_BSS == TRUE
145 /* BSS initialization. Note, it assumes that the DATA size
146 is a multiple of 4 so the linker file must ensure this.*/
147 movs r0, #0
148 ldr r1, =__bss_base__
149 ldr r2, =__bss_end__
150bloop:
151 cmp r1, r2
152 itt lo
153 strlo r0, [r1], #4
154 blo bloop
155#endif /* CRT0_INIT_BSS == TRUE */
156
157#if CRT0_CALL_CONSTRUCTORS == TRUE
158 /* Constructors invocation.*/
159 ldr r4, =__init_array_base__
160 ldr r5, =__init_array_end__
161initloop:
162 cmp r4, r5
163 bge endinitloop
164 ldr r1, [r4], #4
165 blx r1
166 b initloop
167endinitloop:
168#endif /* CRT0_CALL_CONSTRUCTORS == TRUE */
169
170 /* Main program invocation, r0 contains the returned value.*/
171 bl main
172
173#if CRT0_CALL_DESTRUCTORS == TRUE
174 /* Destructors invocation.*/
175 ldr r4, =__fini_array_base__
176 ldr r5, =__fini_array_end__
177finiloop:
178 cmp r4, r5
179 bge endfiniloop
180 ldr r1, [r4], #4
181 blx r1
182 b finiloop
183endfiniloop:
184#endif /* CRT0_CALL_DESTRUCTORS == TRUE */
185
186.exitloop: b .exitloop
187
188#endif /* !defined(__DOXYGEN__) */
189
190/** @} */
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