[haiku-3rdparty-dev] Re: Getting stack Top/Bottom of running application
- From: Tomas Wilhelmsson <tomas.wilhelmsson@xxxxxxxxx>
- To: haiku-3rdparty-dev@xxxxxxxxxxxxx
- Date: Tue, 24 Nov 2009 22:36:58 +0100
> Again, define what you need exactly. Otherwise no-one can help you.
>
> CU, Ingo
>
>
Ok The grabage collector in D needs the stack top pointer and the stack
bottom pointer of the currently running application to work.
for example in Win32 the stack bottom is taken as so:
void *rt_stackBottm() {
void* bottom;
asm
{
mov EAX, FS:4;
mov bottom, EAX;
}
return bottom;
}
in linux it is:
void *rt_stackBottm() {
static void** libc_stack_end;
if( libc_stack_end == libc_stack_end.init )
{
void* handle = dlopen( null, RTLD_NOW );
libc_stack_end = cast(void**) dlsym( handle,
"__libc_stack_end" );
dlclose( handle );
}
return *libc_stack_end;
}
what would be the equalent of these two in Haiku ?
And for the data segment start/end also needed by the GC for cleanups
The Data_Start should point to the data segment in the memory where the file
was loaded i guess and
Data_End should point to where it ends.
the alias keyword is like the #define in C, just defines Data_Start/Data_End
to _data_start__ and _bss_end__
also here for example in win32 they do:
extern (C)
{
extern int _data_start__;
extern int _bss_end__;
}
alias _data_start__ Data_Start;
alias _bss_end__ Data_End;
and in linux:
extern (C)
{
extern int _data;
extern int __data_start;
extern int _end;
extern int _data_start__;
extern int _data_end__;
extern int _bss_start__;
extern int _bss_end__;
extern int __fini_array_end;
}
alias __data_start Data_Start;
alias _end Data_End;
and also here, what would be the equalent to do in Haiku to get where the
data segment starts/ends of the currently running application =)
Thanks alot for trying to help, i know im very bad at explaining and its
mostly due to that i dont understand this stuff fully myself :/
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