如何编写Sparc程序集并在Qemu或Simics中运行其二进制文件？

Question

我正在尝试开始编写一些Sparc程序集,但我无法弄清楚如何组装和运行代码.我用arcTools编写了弧形,但就我已经用装配而言.我已下载了simics和qemu,但我不知道从哪里开始.谁能指出我正确的方向？谢谢.

Answer 1

您没有说明您使用的操作系统.对于这个例子,我假设你有linux并且想要编写简单的独立sparc代码(用于教育目的).你将需要binutils和gdb编译sparc和qemu-sparc.将此小样本代码保存为test.s:

.globl _start
_start:
    mov %o0, %g0
1:
    inc %o0
    cmp %o0, 100
    bl 1b
    nop
    b .
    nop

使用as组装和ld链接,如下所示:

$ sparc-linux-as -g -o test.o test.s
$ sparc-linux-ld -g -o test test.o

应该产生二进制文件test:

$ file test
test: ELF 32-bit MSB executable, SPARC, version 1 (SYSV), statically linked, not stripped

现在开始qemu-sparc设置gdb远程调试(选择一个你选择的端口,我使用1234):

$ qemu-sparc -g 1234 test

它会等待gdb连接.在另一个终端中,启动gdb二进制文件:

$ sparc-linux-gdb test
GNU gdb (GDB) 7.3.50.20111117-cvs-debian
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=x86_64-unknown-linux-gnu --target=sparc-linux".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /var/tmp/test...done.
(gdb)

附加到qemu实例:

(gdb) target remote :1234
Remote debugging using :1234
_start () at test.s:3
3           mov %o0, %g0

从这里开始,您可以gdb像往常一样执行代码,检查寄存器和内存.