需要关于“set endian”的信息在solaris机器上

问题描述

任何1请告诉或显示任何程序在我在solaris机器上的gdb中设置endian little之前和之后的行为差异吗？

Can any 1 please tell or show the difference in the behaviour of any program before and after I "set endian little" in gdb on solaris machine?

我想要知道改变它的效果。

I want to know the effect of changing it.

谢谢！

Thanks!

推荐答案

你应该永远不要在自己的本地（而不是远程）调试时设置字节序。

You should never have to set endianness when doing native (as opposed to remote) debugging.

然而，你可以观察这样做的不良后果：

You can however observe the ill effects of doing that:

（这是在Linux / x86机器上，但我希望在Solaris / x86和Solaris / SPARC上可以得到类似的结果）。
$ b

(This is on Linux/x86 machine, but I expect you'll get similar results on Solaris/x86 and Solaris/SPARC).

int main()
{
  int x = 0x1020304;
  return x;
}


gdb -q a.out
Reading symbols from /tmp/a.out...done.
(gdb) b 4
Breakpoint 1 at 0x804835c: file t.c, line 4.
(gdb) r

Breakpoint 1, main () at t.c:4
4     return x;
(gdb) show endian
The target endianness is set automatically (currently little endian)
(gdb) p &x
$1 = (int *) 0xffffce60
(gdb) p/x *(int*)0xffffce60
$2 = 0x1020304
(gdb) set endian big
The target is assumed to be big endian
(gdb) p/x *(int*)0xffffce60
$3 = 0x4030201

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