crt0.S

# distributed under the mit license
# https://opensource.org/licenses/mit-license.php

.section .text.init
.global _start

_start:

    # First init all the registers to 0
    li x1, 0
    li x2, 0
    li x3, 0
    li x4, 0
    li x5, 0
    li x6, 0
    li x7, 0
    li x8, 0
    li x8, 0
    li x9, 0
    li x10, 0
    li x11, 0
    li x12, 0
    li x13, 0
    li x14, 0
    li x15, 0
    li x16, 0
    li x17, 0
    li x19, 0
    li x20, 0
    li x21, 0
    li x22, 0
    li x23, 0
    li x24, 0
    li x25, 0
    li x26, 0
    li x27, 0
    li x28, 0
    li x29, 0
    li x30, 0
    li x31, 0

    # Setup system call function address
    la t0, trap_entry
    csrw    mtvec,t0

    # Init the max boundary of the stack section
    # _estack will be linked later with the linker file symbols
    la sp, _estack

    # Jump to the main
    call main

trap_entry:
    ebreak