diff options
Diffstat (limited to 'libgloss/fr30/crt0.s')
| -rw-r--r-- | libgloss/fr30/crt0.s | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/libgloss/fr30/crt0.s b/libgloss/fr30/crt0.s new file mode 100644 index 000000000..e83a30849 --- /dev/null +++ b/libgloss/fr30/crt0.s @@ -0,0 +1,46 @@ +# FR30 startup code + + .section .text + .global _start +_start: + + ;; Initialise the stack pointer + ldi:32 __stack, r0 + mov r0, sp + mov r0, fp + + ;; Zero the data space + ldi:32 #_edata, r0 + ldi:32 #_end, r1 + ldi:8 #0, r2 +.L0: + st r2, @r0 + add #4, r0 + cmp r1, r0 + blt .L0 + + ;; Call global and static constructors + ldi:32 _init, r0 + call @r0 + + ;; Setup destrcutors to be called from exit. + ;; (Just in case main never returns....) + ldi:32 atexit, r0 + ldi:32 _fini, r4 + call @r0 + + ;; Initialise argc, argv and envp to empty + ldi:8 #0, r4 + ldi:8 #0, r5 + ldi:8 #0, r6 + + ;; Call main + ldi:32 main, r0 + call @r0 + + ;; Jump to exit + ldi:32 exit, r0 + call @r0 + + ;; Should never reach here + int #9 |