.section .text
.global kernelvec
.align 4

kernelvec:
    
    addi sp, sp, -256
    
    sd ra, 40(sp)
    sd sp, 48(sp)
    sd gp, 56(sp)
    sd tp, 64(sp)
    sd t0, 72(sp)
    sd t1, 80(sp)
    sd t2, 88(sp)
    sd s0, 96(sp)
    sd s1, 104(sp)
    sd a0, 112(sp)
    sd a1, 120(sp)
    sd a2, 128(sp)
    sd a3, 136(sp)
    sd a4, 144(sp)
    sd a5, 152(sp)
    sd a6, 160(sp)
    sd a7, 168(sp)
    sd s2, 176(sp)
    sd s3, 184(sp)
    sd s4, 192(sp)
    sd s5, 200(sp)
    sd s6, 208(sp)
    sd s7, 216(sp)
    sd s8, 224(sp)
    sd s9, 232(sp)
    sd s10, 240(sp)
    sd s11, 248(sp)
    sd t3, 256(sp)
    sd t4, 264(sp)
    sd t5, 272(sp)
    sd t6, 280(sp)
    
    csrr t0, sepc
    csrr t1, sstatus
    sd t0, 24(sp)   # Trapframe.epc
    sd t1, 32(sp)   # Trapframe.kernel_hartid
    
    mv a0, sp
    call kerneltrap
    
    ld t0, 24(sp)
    ld t1, 32(sp)
    csrw sepc, t0
    csrw sstatus, t1

    ld ra, 40(sp)
    ld gp, 56(sp)
    ld tp, 64(sp)
    ld t0, 72(sp)
    ld t1, 80(sp)
    ld t2, 88(sp)
    ld s0, 96(sp)
    ld s1, 104(sp)
    ld a0, 112(sp)
    ld a1, 120(sp)
    ld a2, 128(sp)
    ld a3, 136(sp)
    ld a4, 144(sp)
    ld a5, 152(sp)
    ld a6, 160(sp)
    ld a7, 168(sp)
    ld s2, 176(sp)
    ld s3, 184(sp)
    ld s4, 192(sp)
    ld s5, 200(sp)
    ld s6, 208(sp)
    ld s7, 216(sp)
    ld s8, 224(sp)
    ld s9, 232(sp)
    ld s10, 240(sp)
    ld s11, 248(sp)
    ld t3, 256(sp)
    ld t4, 264(sp)
    ld t5, 272(sp)
    ld t6, 280(sp)
    
    addi sp, sp, 256
    
    sret