Use objdump to look at problems with calling functions found in the.o files generated by the gcc compilation

The following kernel_main function calls another function, but the red line jump I found that it only jumps to the previous line of instruction set, why is this? Shouldn't you jump to the position of func1?

C语言代码如下:

```c

int add_c(int a,int b)
{
        return a+b;
}

int func1(void)
{
        int a=1;
        int b=2;
        return add_c(a,b);
}

void main(void)
{
        func1();
}

The other two functions are disassembled as follows :

0000000000000000 <add_c>:
   0:    1101                    add    sp,sp,-32
   2:    ec22                    sd    s0,24(sp)
   4:    1000                    add    s0,sp,32
   6:    87aa                    mv    a5,a0
   8:    872e                    mv    a4,a1
   a:    fef42623              sw    a5,-20(s0)
   e:    87ba                    mv    a5,a4
  10:    fef42423              sw    a5,-24(s0)
  14:    fec42783              lw    a5,-20(s0)
  18:    873e                    mv    a4,a5
  1a:    fe842783              lw    a5,-24(s0)
  1e:    9fb9                    addw    a5,a5,a4
  20:    2781                    sext.w    a5,a5
  22:    853e                    mv    a0,a5
  24:    6462                    ld    s0,24(sp)
  26:    6105                    add    sp,sp,32
  28:    8082                    ret

000000000000002a <func1>:
  2a:    1101                    add    sp,sp,-32
  2c:    ec06                    sd    ra,24(sp)
  2e:    e822                    sd    s0,16(sp)
  30:    1000                    add    s0,sp,32
  32:    4785                    li    a5,1
  34:    fef42623              sw    a5,-20(s0)
  38:    4789                    li    a5,2
  3a:    fef42423              sw    a5,-24(s0)
  3e:    fe842703              lw    a4,-24(s0)
  42:    fec42783              lw    a5,-20(s0)
  46:    85ba                    mv    a1,a4
  48:    853e                    mv    a0,a5
  4a:    00000097              auipc    ra,0x0
  4e:    000080e7              jalr    ra # 4a <func1+0x20>
  52:    87aa                    mv    a5,a0
  54:    853e                    mv    a0,a5
  56:    60e2                    ld    ra,24(sp)
  58:    6442                    ld    s0,16(sp)
  5a:    6105                    add    sp,sp,32
  5c:    8082                    ret