On 08/13/2010 10:38 AM, Job Noorman wrote:
> On Friday 13 August 2010 11:32:25 you wrote:
>> On 08/13/2010 10:25 AM, Job Noorman wrote:
>>> //file main.cpp
>>> void func() {}
>>>
>>> int main()
>>> {
>>>
>>> //this works but GCC generates an indirect call:
>>> // movl $_Z4funcv, %eax
>>> // call *%eax
>>> asm("call *%0" : : "r"(func));
>>>
>>> //this is what I conceptually want to do but doesn't work because
>>> //GCC generates
>>> // call $_Z4funcv
>>> //which gives an error from the assembler:
>>> // main.cpp: Assembler messages:
>>> // main.cpp:20: Error: suffix or operands invalid for `call'
>>> //I would like to find a way to make GCC generate the following:
>>> // call _Z4funcv
>>> //(note there is no "$")
>>> asm("call %0" : : "i"(func));
>>>
>>> }
>>
>> asm("call %P0" : : "i"(func));
> Wow thanks a lot!
> Is this feature documented somewhere? I've been looking through the manuals
> but haven't found it.
I have no idea. I just looked in the gcc source code.
Andrew.
