projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 385c9217 | 1 | /* Startup code for M68HC11. |
| 748086b7 | 2 | Copyright (C) 1999, 2000, 2002, 2008, 2009 Free Software Foundation, Inc. |
| 385c9217 SC |
3 | |
| 4 | This file is free software; you can redistribute it and/or modify it | |
| 5 | under the terms of the GNU General Public License as published by the | |
| 748086b7 | 6 | Free Software Foundation; either version 3, or (at your option) any |
| 385c9217 SC |
7 | later version. |
| 8 | ||
| 385c9217 SC |
9 | This file is distributed in the hope that it will be useful, but |
| 10 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | General Public License for more details. | |
| 13 | ||
| 748086b7 JJ |
14 | Under Section 7 of GPL version 3, you are granted additional |
| 15 | permissions described in the GCC Runtime Library Exception, version | |
| 16 | 3.1, as published by the Free Software Foundation. | |
| 385c9217 | 17 | |
| 748086b7 JJ |
18 | You should have received a copy of the GNU General Public License and |
| 19 | a copy of the GCC Runtime Library Exception along with this program; | |
| 20 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 21 | <http://www.gnu.org/licenses/>. */ | |
| 385c9217 SC |
22 | |
| 23 | ;----------------------------------------- | |
| 24 | ; startup code | |
| 25 | ;----------------------------------------- | |
| 385c9217 | 26 | |
| 084de18d SC |
27 | #ifdef __HAVE_SHORT_INT__ |
| 28 | .mode mshort | |
| 29 | #else | |
| 30 | .mode mlong | |
| 31 | #endif | |
| 32 | ||
| 33 | #if defined(__USE_RTC__) && defined(mc68hc12) | |
| 34 | .macro jsr name | |
| 35 | call \name | |
| 36 | .endm | |
| 37 | #endif | |
| 385c9217 SC |
38 | ;; |
| 39 | ;; | |
| 40 | ;; The linker concatenate the .install* sections in the following order: | |
| 41 | ;; | |
| 42 | ;; .install0 Setup the stack pointer | |
| 43 | ;; .install1 Place holder for applications | |
| 44 | ;; .install2 Optional installation of data section in memory | |
| 45 | ;; .install3 Place holder for applications | |
| 46 | ;; .install4 Invokes the main | |
| 47 | ;; | |
| 48 | .sect .install0,"ax",@progbits | |
| 49 | .globl _start | |
| 50 | ||
| 51 | _start: | |
| 52 | ;; | |
| 53 | ;; At this step, the stack is not initialized and interrupts are masked. | |
| 54 | ;; Applications only have 64 cycles to initialize some registers. | |
| 55 | ;; | |
| 56 | ;; To have a generic/configurable startup, initialize the stack to | |
| 57 | ;; the end of some memory region. The _stack symbol is defined by | |
| 58 | ;; the linker. | |
| 59 | ;; | |
| 60 | lds #_stack | |
| 61 | ||
| 62 | .sect .install2,"ax",@progbits | |
| 63 | ;; | |
| 64 | ;; Call a specific initialization operation. The default is empty. | |
| 5bdc5878 | 65 | ;; It can be overridden by applications. It is intended to initialize |
| 385c9217 SC |
66 | ;; the 68hc11 registers. Function prototype is: |
| 67 | ;; | |
| 68 | ;; int __premain(void); | |
| 69 | ;; | |
| 70 | jsr __premain | |
| 71 | ||
| 72 | ;; | |
| 73 | ;; | |
| 74 | ;; | |
| 75 | .sect .install4,"ax",@progbits | |
| 76 | jsr main | |
| 77 | fatal: | |
| 78 | jsr exit | |
| 79 | bra fatal | |
| 80 | ||
| 81 | ;----------------------------------------- | |
| 82 | ; end startup code | |
| 83 | ;----------------------------------------- | |
| 84 | ;; Force loading of data section mapping and bss clear | |
| 85 | .2byte __map_data_section | |
| 86 | .2byte __init_bss_section |