0x0000000000400448 <func+0>:    push   %rbp
0x0000000000400449 <func+1>:    mov    %rsp,%rbp
0x000000000040044c <func+4>:    mov    $0x1,%eax
0x0000000000400451 <func+9>:    leaveq 
0x0000000000400452 <func+10>:   retq 

尝试了break 0x0000000000400448不行。