.section .text.init
  .globl _prog_start
_prog_start:

  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  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  x18,0
  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

  # li t0, 0xffff
  # csrc mie, t0

  # li t0, 0xa
  # csrc mstatus, t0

  li sp, 0x80010000

  # la t0, trap_entry
  # csrw mtvec, t0



  call main

  li gp, 1;
  ecall

trap_entry:
  addi sp, sp, -136

  sw x1,  1* 4(sp)
  sw x2,  2* 4(sp)
  sw x3,  3* 4(sp)
  sw x4,  4* 4(sp)
  sw x5,  5* 4(sp)
  sw x6,  6* 4(sp)
  sw x7,  7* 4(sp)
  sw x8,  8* 4(sp)
  sw x9,  9* 4(sp)
  sw x10, 10*4(sp)
  sw x11, 11*4(sp)
  sw x12, 12*4(sp)
  sw x13, 13*4(sp)
  sw x14, 14*4(sp)
  sw x15, 15*4(sp)
  sw x16, 16*4(sp)
  sw x17, 17*4(sp)
  sw x18, 18*4(sp)
  sw x19, 19*4(sp)
  sw x20, 20*4(sp)
  sw x21, 21*4(sp)
  sw x22, 22*4(sp)
  sw x23, 23*4(sp)
  sw x24, 24*4(sp)
  sw x25, 25*4(sp)
  sw x26, 26*4(sp)
  sw x27, 27*4(sp)
  sw x28, 28*4(sp)
  sw x29, 29*4(sp)
  sw x30, 30*4(sp)
  sw x31, 31*4(sp)

  # csrr a0, mcause
  # csrr a1, mepc
  mv a2, sp
  jal handle_trap
  # csrw mepc, a0


  # li t0, MSTATUS_MPP
  # csrs mstatus, t0

  lw x1,  1 *4(sp)
  lw x2,  2 *4(sp)
  lw x3,  3 *4(sp)
  lw x4,  4 *4(sp)
  lw x5,  5 *4(sp)
  lw x6,  6 *4(sp)
  lw x7,  7 *4(sp)
  lw x8,  8 *4(sp)
  lw x9,  9 *4(sp)
  lw x10, 10*4(sp)
  lw x11, 11*4(sp)
  lw x12, 12*4(sp)
  lw x13, 13*4(sp)
  lw x14, 14*4(sp)
  lw x15, 15*4(sp)
  lw x16, 16*4(sp)
  lw x17, 17*4(sp)
  lw x18, 18*4(sp)
  lw x19, 19*4(sp)
  lw x20, 20*4(sp)
  lw x21, 21*4(sp)
  lw x22, 22*4(sp)
  lw x23, 23*4(sp)
  lw x24, 24*4(sp)
  lw x25, 25*4(sp)
  lw x26, 26*4(sp)
  lw x27, 27*4(sp)
  lw x28, 28*4(sp)
  lw x29, 29*4(sp)
  lw x30, 30*4(sp)
  lw x31, 31*4(sp)

  addi sp, sp, 136
  mret