AsmREPLx86-64 汇编语言的 REPL-技术圈

AsmREPL 是一个适用于 64 位 x86 汇编语言的 REPL，支持以最低级语言进行交互式编码。

用法：

安装 gem：

$ gem install asmrepl

然后像这样启动 repl：

$ asmrepl

如果你是在macOS上，你需要用sudo启动rep。

当 REPL 启动时，它将显示所有寄存器值和标志：

================== CPU STATE ===================
rax  000000000000000000  r8   0x00007f89d0f04640
rbx  000000000000000000  r9   0x0000000000000004
rcx  0x00007f89d0f04a50  r10  000000000000000000
rdx  0x..fc611d3f0aa2900d4  r11  0x00000001033a4000
rdi  0x00007ff7bd126148  r12  000000000000000000
rsi  000000000000000000  r13  0x00007ff7bd125dc0
rbp  0x00007ff7bd125c40  r14  000000000000000000
rsp  0x00007ff7bd125c38  r15  000000000000000000

rip     0x00000001033a4001
rflags  0x0000000000000246
cs      0x000000000000002b
fs      000000000000000000
gs      000000000000000000

FLAGS: ["PF", "ZF", "IF"]

(rip 0x00000001033a4001)>

然后你可以发出命令并检查寄存器值。让我们写入 rax寄存器并检查它的值：

(rip 0x00000001033a4001)> mov rax, 5
=============== REGISTER CHANGES ===============
rax     000000000000000000 => 0x0000000000000005

(rip 0x00000001033a4009)> rax
0x0000000000000005
(rip 0x00000001033a4009)>

现在让我们写入rbx寄存器并将两个值相加：

(rip 0x00000001033a4009)> mov rbx, 3
=============== REGISTER CHANGES ===============
rbx     000000000000000000 => 0x0000000000000003

(rip 0x00000001033a4011)> add rax, rbx
=============== REGISTER CHANGES ===============
rax     0x0000000000000005 => 0x0000000000000008
rflags  0x0000000000000246 => 0x0000000000000202

FLAGS: ["IF"]

(rip 0x00000001033a4015)> rax
0x0000000000000008
(rip 0x00000001033a4015)> rbx
0x0000000000000003
(rip 0x00000001033a4015)>

最后，让我们检查 CPU 中的所有值：

(rip 0x00000001033a4015)> cpu
================== CPU STATE ===================
rax  0x0000000000000008  r8   0x00007f89d0f04640
rbx  0x0000000000000003  r9   0x0000000000000004
rcx  0x00007f89d0f04a50  r10  000000000000000000
rdx  0x..fc611d3f0aa2900d4  r11  0x00000001033a4000
rdi  0x00007ff7bd126148  r12  000000000000000000
rsi  000000000000000000  r13  0x00007ff7bd125dc0
rbp  0x00007ff7bd125c40  r14  000000000000000000
rsp  0x00007ff7bd125c38  r15  000000000000000000

rip     0x00000001033a4015
rflags  0x0000000000000202
cs      0x000000000000002b
fs      000000000000000000
gs      000000000000000000

FLAGS: ["IF"]

(rip 0x00000001033a4015)>