On 09/23/2014 10:39 AM, Bin Meng wrote:
> On Tue, Sep 23, 2014 at 5:11 PM, Bin Meng <bmeng...@gmail.com> wrote:
>>
>> Sorry I still don't get it. The inline-asm codes are put in the very end
>> of the test function just before return, so the clobbered registers are
>> not used by gcc.
And neither are they used by the asm; so you have no right to expect %edx
to contain anything, and neither have you the right to touch it.
Do this:
asm volatile (
"pushl %1;"
"call *%%eax;"
"addl $4, %%esp;"
: "=a"(status) : "m"(params_ptr), "a"(pcall), "d"(d)
);
"If you lie to the compiler, it will get its revenge." -- Henry Spencer
Andrew.
