|
Last change
on this file since 612 was
444,
checked in by satin@…, 6 years ago
|
|
add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
|
|
File size:
692 bytes
|
| Rev | Line | |
|---|
| [444] | 1 | # FR30 startup code |
|---|
| 2 | |
|---|
| 3 | .section .text |
|---|
| 4 | .global _start |
|---|
| 5 | _start: |
|---|
| 6 | |
|---|
| 7 | ;; Initialise the stack pointer |
|---|
| 8 | ldi:32 __stack, r0 |
|---|
| 9 | mov r0, sp |
|---|
| 10 | mov r0, fp |
|---|
| 11 | |
|---|
| 12 | ;; Zero the data space |
|---|
| 13 | ldi:32 #_edata, r0 |
|---|
| 14 | ldi:32 #_end, r1 |
|---|
| 15 | ldi:8 #0, r2 |
|---|
| 16 | .L0: |
|---|
| 17 | st r2, @r0 |
|---|
| 18 | add #4, r0 |
|---|
| 19 | cmp r1, r0 |
|---|
| 20 | blt .L0 |
|---|
| 21 | |
|---|
| 22 | ;; Call global and static constructors |
|---|
| 23 | ldi:32 _init, r0 |
|---|
| 24 | call @r0 |
|---|
| 25 | |
|---|
| 26 | ;; Setup destrcutors to be called from exit. |
|---|
| 27 | ;; (Just in case main never returns....) |
|---|
| 28 | ldi:32 atexit, r0 |
|---|
| 29 | ldi:32 _fini, r4 |
|---|
| 30 | call @r0 |
|---|
| 31 | |
|---|
| 32 | ;; Initialise argc, argv and envp to empty |
|---|
| 33 | ldi:8 #0, r4 |
|---|
| 34 | ldi:8 #0, r5 |
|---|
| 35 | ldi:8 #0, r6 |
|---|
| 36 | |
|---|
| 37 | ;; Call main |
|---|
| 38 | ldi:32 main, r0 |
|---|
| 39 | call @r0 |
|---|
| 40 | |
|---|
| 41 | ;; Jump to exit |
|---|
| 42 | ldi:32 exit, r0 |
|---|
| 43 | call @r0 |
|---|
| 44 | |
|---|
| 45 | ;; Should never reach here |
|---|
| 46 | int #9 |
|---|
Note: See
TracBrowser
for help on using the repository browser.
