newlib-cygwin/newlib/libc/sys/h8300hms/crt0.S

88 lines
1.2 KiB
ArmAsm

; h8/300 and h8/300h start up file.
#ifdef __H8300__
.section .text
.global _start
_start:
mov.w #_stack,sp
mov.w #_edata,r0
mov.w #_end,r1
sub.w r2,r2
.loop: mov.w r2,@r0
adds #2,r0
cmp r1,r0
blo .loop
#ifdef __ELF__
mov.l #__fini,r0
jsr @_atexit
jsr @__init
#else
jsr @___main
#endif
jsr @_main
jsr @_exit
.section .stack
_stack: .word 1
#endif
#ifdef __H8300H__
.h8300h
.section .text
.global _start
_start:
mov.l #_stack,sp
mov.l #_edata,er0
mov.l #_end,er1
sub.w r2,r2 ; not sure about alignment requirements
.loop: mov.w r2,@er0 ; playing it safe for now
adds #2,er0
cmp.l er1,er0
blo .loop
#ifdef __ELF__
mov.l #__fini,r0
jsr @_atexit
jsr @__init
#else
jsr @___main
#endif
jsr @_main
jsr @_exit
.section .stack
_stack: .long 1
#endif
#ifdef __H8300S__
.h8300s
.section .text
.global _start
_start:
mov.l #_stack,sp
mov.l #_edata,er0
mov.l #_end,er1
sub.w r2,r2 ; not sure about alignment requirements
.loop: mov.w r2,@er0 ; playing it safe for now
adds #2,er0
cmp.l er1,er0
blo .loop
#ifdef __ELF__
mov.l #__fini,r0
jsr @_atexit
jsr @__init
#else
jsr @___main
#endif
jsr @_main
jsr @_exit
.section .stack
_stack: .long 1
#endif