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| author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2014-05-26 14:43:02 +0000 |
|---|---|---|
| committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2014-05-26 14:43:02 +0000 |
| commit | ffdbef26d6bc06b135c43d683403c9d56e53da07 (patch) | |
| tree | 93efb1164766c640386ae57e88736cac3ba39d21 /os/common/ports/ARM/compilers/GCC/crt0.s | |
| parent | e1fe47b7f9200eb2d1796fb8348d014f826aca4b (diff) | |
| download | ChibiOS-ffdbef26d6bc06b135c43d683403c9d56e53da07.tar.gz ChibiOS-ffdbef26d6bc06b135c43d683403c9d56e53da07.tar.bz2 ChibiOS-ffdbef26d6bc06b135c43d683403c9d56e53da07.zip | |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@6964 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/common/ports/ARM/compilers/GCC/crt0.s')
| -rw-r--r-- | os/common/ports/ARM/compilers/GCC/crt0.s | 254 |
1 files changed, 128 insertions, 126 deletions
diff --git a/os/common/ports/ARM/compilers/GCC/crt0.s b/os/common/ports/ARM/compilers/GCC/crt0.s index 4e7106fb5..8eae3452d 100644 --- a/os/common/ports/ARM/compilers/GCC/crt0.s +++ b/os/common/ports/ARM/compilers/GCC/crt0.s @@ -1,6 +1,6 @@ /*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
- 2011,2012,2013 Giovanni Di Sirio.
+ 2011,2012,2013 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
@@ -28,133 +28,135 @@ #if !defined(__DOXYGEN__)
- .set MODE_USR, 0x10
- .set MODE_FIQ, 0x11
- .set MODE_IRQ, 0x12
- .set MODE_SVC, 0x13
- .set MODE_ABT, 0x17
- .set MODE_UND, 0x1B
- .set MODE_SYS, 0x1F
+ .set MODE_USR, 0x10
+ .set MODE_FIQ, 0x11
+ .set MODE_IRQ, 0x12
+ .set MODE_SVC, 0x13
+ .set MODE_ABT, 0x17
+ .set MODE_UND, 0x1B
+ .set MODE_SYS, 0x1F
- .set I_BIT, 0x80
- .set F_BIT, 0x40
+ .set I_BIT, 0x80
+ .set F_BIT, 0x40
- .text
- .code 32
- .balign 4
+ .text
+ .code 32
+ .balign 4
/*
* Reset handler.
*/
- .global Reset_Handler
+ .global Reset_Handler
Reset_Handler:
- /*
- * Stack pointers initialization.
- */
- ldr r0, =___stacks_end__
- /* Undefined */
- msr CPSR_c, #MODE_UND | I_BIT | F_BIT
- mov sp, r0
- ldr r1, =__und_stack_size__
- sub r0, r0, r1
- /* Abort */
- msr CPSR_c, #MODE_ABT | I_BIT | F_BIT
- mov sp, r0
- ldr r1, =__abt_stack_size__
- sub r0, r0, r1
- /* FIQ */
- msr CPSR_c, #MODE_FIQ | I_BIT | F_BIT
- mov sp, r0
- ldr r1, =__fiq_stack_size__
- sub r0, r0, r1
- /* IRQ */
- msr CPSR_c, #MODE_IRQ | I_BIT | F_BIT
- mov sp, r0
- ldr r1, =__irq_stack_size__
- sub r0, r0, r1
- /* Supervisor */
- msr CPSR_c, #MODE_SVC | I_BIT | F_BIT
- mov sp, r0
- ldr r1, =__svc_stack_size__
- sub r0, r0, r1
- /* System */
- msr CPSR_c, #MODE_SYS | I_BIT | F_BIT
- mov sp, r0
-// ldr r1, =__sys_stack_size__
-// sub r0, r0, r1
- /*
- * Early initialization.
- */
-#ifndef THUMB_NO_INTERWORKING
- bl __early_init
-#else
- add r0, pc, #1
- bx r0
- .code 16
- bl __early_init
- mov r0, pc
- bx r0
- .code 32
-#endif
- /*
- * Data initialization.
- * NOTE: It assumes that the DATA size is a multiple of 4.
- */
- ldr r1, =_textdata
- ldr r2, =_data
- ldr r3, =_edata
+ /*
+ * Stack pointers initialization.
+ */
+ ldr r0, =___stacks_end__
+ /* Undefined */
+ msr CPSR_c, #MODE_UND | I_BIT | F_BIT
+ mov sp, r0
+ ldr r1, =__und_stack_size__
+ sub r0, r0, r1
+ /* Abort */
+ msr CPSR_c, #MODE_ABT | I_BIT | F_BIT
+ mov sp, r0
+ ldr r1, =__abt_stack_size__
+ sub r0, r0, r1
+ /* FIQ */
+ msr CPSR_c, #MODE_FIQ | I_BIT | F_BIT
+ mov sp, r0
+ ldr r1, =__fiq_stack_size__
+ sub r0, r0, r1
+ /* IRQ */
+ msr CPSR_c, #MODE_IRQ | I_BIT | F_BIT
+ mov sp, r0
+ ldr r1, =__irq_stack_size__
+ sub r0, r0, r1
+ /* Supervisor */
+ msr CPSR_c, #MODE_SVC | I_BIT | F_BIT
+ mov sp, r0
+ ldr r1, =__svc_stack_size__
+ sub r0, r0, r1
+ /* System */
+ msr CPSR_c, #MODE_SYS | I_BIT | F_BIT
+ mov sp, r0
+// ldr r1, =__sys_stack_size__
+// sub r0, r0, r1
+ /*
+ * Early initialization.
+ */
+#if !defined(THUMB_NO_INTERWORKING)
+ bl __early_init
+#else /* defined(THUMB_NO_INTERWORKING) */
+ add r0, pc, #1
+ bx r0
+ .code 16
+ bl __early_init
+ mov r0, pc
+ bx r0
+ .code 32
+#endif /* defined(THUMB_NO_INTERWORKING) */
+
+ /*
+ * Data initialization.
+ * NOTE: It assumes that the DATA size is a multiple of 4.
+ */
+ ldr r1, =_textdata
+ ldr r2, =_data
+ ldr r3, =_edata
dataloop:
- cmp r2, r3
- ldrlo r0, [r1], #4
- strlo r0, [r2], #4
- blo dataloop
- /*
- * BSS initialization.
- * NOTE: It assumes that the BSS size is a multiple of 4.
- */
- mov r0, #0
- ldr r1, =_bss_start
- ldr r2, =_bss_end
+ cmp r2, r3
+ ldrlo r0, [r1], #4
+ strlo r0, [r2], #4
+ blo dataloop
+ /*
+ * BSS initialization.
+ * NOTE: It assumes that the BSS size is a multiple of 4.
+ */
+ mov r0, #0
+ ldr r1, =_bss_start
+ ldr r2, =_bss_end
bssloop:
- cmp r1, r2
- strlo r0, [r1], #4
- blo bssloop
- /*
- * Late initialization.
- */
-#ifndef THUMB_NO_INTERWORKING
- bl __late_init
-#else
- add r0, pc, #1
- bx r0
- .code 16
- bl __late_init
- mov r0, pc
- bx r0
- .code 32
-#endif
- /*
- * Main program invocation.
- */
-#ifdef THUMB_NO_INTERWORKING
- add r0, pc, #1
- bx r0
- .code 16
- bl main
- ldr r1, =_main_exit_handler
- bx r1
- .code 32
-#else
- bl main
- b _main_exit_handler
-#endif
+ cmp r1, r2
+ strlo r0, [r1], #4
+ blo bssloop
+ /*
+ * Late initialization.
+ */
+#if !defined(THUMB_NO_INTERWORKING)
+ bl __late_init
+#else /* defined(THUMB_NO_INTERWORKING) */
+ add r0, pc, #1
+ bx r0
+ .code 16
+ bl __late_init
+ mov r0, pc
+ bx r0
+ .code 32
+#endif /* defined(THUMB_NO_INTERWORKING) */
+
+ /*
+ * Main program invocation.
+ */
+#if defined(THUMB_NO_INTERWORKING)
+ add r0, pc, #1
+ bx r0
+ .code 16
+ bl main
+ ldr r1, =_main_exit_handler
+ bx r1
+ .code 32
+#else /* !defined(THUMB_NO_INTERWORKING)
+ bl main
+ b _main_exit_handler
+#endif /* !defined(THUMB_NO_INTERWORKING) */
/*
* Default main function exit handler.
*/
- .weak _main_exit_handler
+ .weak _main_exit_handler
_main_exit_handler:
-.loop: b .loop
+.loop: b .loop
/*
* Default early initialization code. It is declared weak in order to be
@@ -162,14 +164,14 @@ _main_exit_handler: * Early initialization is performed just before reset before BSS and DATA
* segments initialization.
*/
-#ifdef THUMB_NO_INTERWORKING
- .thumb_func
- .code 16
+#if defined(THUMB_NO_INTERWORKING)
+ .thumb_func
+ .code 16
#endif
- .weak __early_init
+ .weak __early_init
__early_init:
- bx lr
- .code 32
+ bx lr
+ .code 32
#endif
/*
@@ -178,14 +180,14 @@ __early_init: * Early initialization is performed just after reset before BSS and DATA
* segments initialization.
*/
-#ifdef THUMB_NO_INTERWORKING
- .thumb_func
- .code 16
+#if defined(THUMB_NO_INTERWORKING)
+ .thumb_func
+ .code 16
#endif
- .weak __late_init
+ .weak __late_init
__late_init:
- bx lr
- .code 32
+ bx lr
+ .code 32
#endif
/** @} */
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