mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-28 05:51:04 +00:00
73 lines
1.2 KiB
ArmAsm
73 lines
1.2 KiB
ArmAsm
# NEC V850 startup code
|
|
|
|
.section .text
|
|
.global _start
|
|
|
|
_start:
|
|
|
|
#if defined __v850e__
|
|
|
|
movea 255, r0, r20
|
|
mov 65535, r21
|
|
mov hilo(_stack), sp
|
|
mov hilo(__ep), ep
|
|
mov hilo(__gp), gp
|
|
mov hilo(__ctbp), r6
|
|
ldsr r6, ctbp
|
|
mov hilo(_edata), r6
|
|
mov hilo(_end), r7
|
|
.L0:
|
|
st.w r0, 0[r6]
|
|
addi 4, r6, r6
|
|
cmp r7, r6
|
|
bl .L0
|
|
.L1:
|
|
jarl ___main, r31
|
|
addi -16, sp, sp
|
|
mov 0, r6
|
|
mov 0, r7
|
|
mov 0, r8
|
|
jarl _main, r31
|
|
mov r10, r6
|
|
jarl _exit, r31
|
|
|
|
# else
|
|
movea 255, r0, r20
|
|
mov r0, r21
|
|
ori 65535, r0, r21
|
|
movhi hi(_stack), r0, sp
|
|
movea lo(_stack), sp, sp
|
|
movhi hi(__ep), r0, ep
|
|
movea lo(__ep), ep, ep
|
|
movhi hi(__gp), r0, gp
|
|
movea lo(__gp), gp, gp
|
|
|
|
movhi hi(_edata), r0, r6
|
|
movea lo(_edata), r6, r6
|
|
movhi hi(_end), r0, r7
|
|
movea lo(_end), r7, r7
|
|
.L0:
|
|
st.b r0, 0[r6]
|
|
addi 1, r6, r6
|
|
cmp r7, r6
|
|
bl .L0
|
|
.L1:
|
|
jarl ___main, r31
|
|
addi -16, sp, sp
|
|
mov 0, r6
|
|
mov 0, r7
|
|
mov 0, r8
|
|
jarl _main, r31
|
|
mov r10, r6
|
|
jarl _exit, r31
|
|
# endif
|
|
|
|
.section .stack
|
|
_stack: .long 1
|
|
|
|
.section .data
|
|
.global ___dso_handle
|
|
.weak ___dso_handle
|
|
___dso_handle:
|
|
.long 0
|