Alan Song
asd
Fork of
mbed-rtos
by 
mbed official
Diff: rtx/TARGET_ARM7/RTX_CM_lib.h
- Revision:
- 116:0788b1a76461
- Parent:
- 80:2dab120a94c2
- Child:
- 118:6635230e06ba
--- a/rtx/TARGET_ARM7/RTX_CM_lib.h Tue May 17 13:00:14 2016 +0100
+++ b/rtx/TARGET_ARM7/RTX_CM_lib.h Mon May 23 10:00:41 2016 +0100
@@ -195,8 +195,8 @@
*---------------------------------------------------------------------------*/
/* Main Thread definition */
-extern int main (void);
-osThreadDef_t os_thread_def_main = {(os_pthread)main, osPriorityNormal, 0, NULL};
+extern void pre_main (void);
+osThreadDef_t os_thread_def_main = {(os_pthread)pre_main, osPriorityNormal, 0, NULL};
// This define should be probably moved to the CMSIS layer
@@ -230,7 +230,11 @@
#if defined (__CC_ARM)
#ifdef __MICROLIB
+
+int main(void);
void _main_init (void) __attribute__((section(".ARM.Collect$$$$000000FF")));
+void $Super$$__cpp_initialize__aeabi_(void);
+
void _main_init (void) {
osKernelInitialize();
set_main_stack();
@@ -238,8 +242,45 @@
osKernelStart();
for (;;);
}
+
+void $Sub$$__cpp_initialize__aeabi_(void)
+{
+ // this should invoke C++ initializers prior _main_init, we keep this empty and
+ // invoke them after _main_init (=starts RTX kernel)
+}
+
+void pre_main()
+{
+ $Super$$__cpp_initialize__aeabi_();
+ main();
+}
+
#else
+void * armcc_heap_base;
+void * armcc_heap_top;
+
+__asm void pre_main (void)
+{
+ IMPORT __rt_lib_init
+ IMPORT main
+ IMPORT armcc_heap_base
+ IMPORT armcc_heap_top
+
+ LDR R0,=armcc_heap_base
+ LDR R1,=armcc_heap_top
+ LDR R0,[R0]
+ LDR R1,[R1]
+ /* Save link register (keep 8 byte alignment with dummy R4) */
+ PUSH {R4, LR}
+ BL __rt_lib_init
+ BL main
+ /* Return to the thread destroy function.
+ */
+ POP {R4, PC}
+ ALIGN
+}
+
/* The single memory model is checking for stack collision at run time, verifing
that the heap pointer is underneath the stack pointer.
@@ -251,127 +292,109 @@
__asm void __rt_entry (void) {
IMPORT __user_setup_stackheap
- IMPORT __rt_lib_init
+ IMPORT armcc_heap_base
+ IMPORT armcc_heap_top
IMPORT os_thread_def_main
IMPORT osKernelInitialize
IMPORT set_main_stack
IMPORT osKernelStart
IMPORT osThreadCreate
- IMPORT exit
+ /* __user_setup_stackheap returns:
+ * - Heap base in r0 (if the program uses the heap).
+ * - Stack base in sp.
+ * - Heap limit in r2 (if the program uses the heap and uses two-region memory).
+ *
+ * More info can be found in:
+ * ARM Compiler ARM C and C++ Libraries and Floating-Point Support User Guide
+ */
BL __user_setup_stackheap
- MOV R1,R2
- BL __rt_lib_init
+ LDR R3,=armcc_heap_base
+ LDR R4,=armcc_heap_top
+ STR R0,[R3]
+ STR R2,[R4]
BL osKernelInitialize
BL set_main_stack
LDR R0,=os_thread_def_main
MOVS R1,#0
BL osThreadCreate
BL osKernelStart
- BL exit
+ /* osKernelStart should not return */
+ B .
ALIGN
}
+
#endif
#elif defined (__GNUC__)
-#ifdef __CS3__
-
-/* CS3 start_c routine.
- *
- * Copyright (c) 2006, 2007 CodeSourcery Inc
- *
- * The authors hereby grant permission to use, copy, modify, distribute,
- * and license this software and its documentation for any purpose, provided
- * that existing copyright notices are retained in all copies and that this
- * notice is included verbatim in any distributions. No written agreement,
- * license, or royalty fee is required for any of the authorized uses.
- * Modifications to this software may be copyrighted by their authors
- * and need not follow the licensing terms described here, provided that
- * the new terms are clearly indicated on the first page of each file where
- * they apply.
- */
-
-#include "cs3.h"
-
+extern void __libc_fini_array(void);
extern void __libc_init_array (void);
-
-__attribute ((noreturn)) void __cs3_start_c (void){
- unsigned regions = __cs3_region_num;
- const struct __cs3_region *rptr = __cs3_regions;
+extern int main(int argc, char **argv);
- /* Initialize memory */
- for (regions = __cs3_region_num, rptr = __cs3_regions; regions--; rptr++) {
- long long *src = (long long *)rptr->init;
- long long *dst = (long long *)rptr->data;
- unsigned limit = rptr->init_size;
- unsigned count;
-
- if (src != dst)
- for (count = 0; count != limit; count += sizeof (long long))
- *dst++ = *src++;
- else
- dst = (long long *)((char *)dst + limit);
- limit = rptr->zero_size;
- for (count = 0; count != limit; count += sizeof (long long))
- *dst++ = 0;
- }
-
- /* Run initializers. */
- __libc_init_array ();
-
- osKernelInitialize();
- set_main_stack();
- osThreadCreate(&os_thread_def_main, NULL);
- osKernelStart();
- for (;;);
+void pre_main(void) {
+ atexit(__libc_fini_array);
+ __libc_init_array();
+ main(0, NULL);
}
-#else
-
__attribute__((naked)) void software_init_hook (void) {
__asm (
".syntax unified\n"
".thumb\n"
- "movs r0,#0\n"
- "movs r1,#0\n"
- "mov r8,r0\n"
- "mov r9,r1\n"
- "ldr r0,= __libc_fini_array\n"
- "bl atexit\n"
- "bl __libc_init_array\n"
- "mov r0,r8\n"
- "mov r1,r9\n"
"bl osKernelInitialize\n"
"bl set_main_stack\n"
"ldr r0,=os_thread_def_main\n"
"movs r1,#0\n"
"bl osThreadCreate\n"
"bl osKernelStart\n"
- "bl exit\n"
+ /* osKernelStart should not return */
+ "B .\n"
);
}
-#endif
-
#elif defined (__ICCARM__)
+extern void* __vector_table;
extern int __low_level_init(void);
extern void __iar_data_init3(void);
+extern __weak void __iar_init_core( void );
+extern __weak void __iar_init_vfp( void );
+extern void __iar_dynamic_initialization(void);
+extern void mbed_sdk_init(void);
extern void exit(int arg);
-__noreturn __stackless void __cmain(void) {
- int a;
+static uint8_t low_level_init_needed;
+
+void pre_main(void) {
+ if (low_level_init_needed) {
+ __iar_dynamic_initialization();
+ }
+ main();
+}
- if (__low_level_init() != 0) {
+#pragma required=__vector_table
+void __iar_program_start( void )
+{
+ __iar_init_core();
+ __iar_init_vfp();
+
+ uint8_t low_level_init_needed_local;
+
+ low_level_init_needed_local = __low_level_init();
+ if (low_level_init_needed_local) {
__iar_data_init3();
+ mbed_sdk_init();
}
+ /* Store in a global variable after RAM has been initialized */
+ low_level_init_needed = low_level_init_needed_local;
osKernelInitialize();
set_main_stack();
osThreadCreate(&os_thread_def_main, NULL);
- a = osKernelStart();
- exit(a);
+ osKernelStart();
+ /* osKernelStart should not return */
+ while (1);
}
#endif