Re: break $function in coff/pe doesn't break exactly before the first statement?

[Pedro Alves <pedro_alves at portugalmail dot pt>]

Eli Zaretskii wrote:
> > Date: Sat, 18 Nov 2006 10:59:42 +0000
> > From: Pedro Alves <pedro_alves@portugalmail.pt>
> >
> > Breakpoint 1, main () at main.c:4
> > 4       {
> > (gdb)
> >
> > While on i686-linux, the breakpoint stops at:
> > 5  printf ("hello world!\n");
> >
> > So on coff targets, an extra 'next' is required to get to the first 
> > statement of the function.
> >     
>
> I can confirm that I see the same with MinGW and GDB 6.3.
>
> However, for the record, please tell what versions of GCC you used on
> both platforms.  I used GCC 3.3.5 on GNU/Linux and the MinGW port of
> GCC 3.4.2 on Windows.
>
>   
On Cygwin:
  gcc version 3.4.4 (cygming special) (gdc 0.12, using dmd 0.125)
with both:
 GNU gdb 6.5.50.20060706-cvs (cygwin-special)
and self-built:
 GNU gdb 6.5.50.20061115-cvs

On GNU/linux (kubuntu 6.06):
 GNU gdb 6.4-debian
 GCC version 4.0.3 (Ubuntu 4.0.3-1ubuntu5)

On arm-wince:
 GNU gdb 6.5.50.20061115-cvs
 GCC 4.1.0 (with lots of local changes)

---

It seems it only happens on 'main'.

1       #include <stdio.h>
2      
3       int
4       function (int a)
5       {
6         printf ("function %d\n", a);
7         return 0;
8       }
9      
10      int
11      main (int argc, char** argv)
12      {
13        printf ("hello world!\n");
14        function (0x55aa);
15        return 0;
16      }


(gdb) r
The program being debugged has been started already.
Start it from the beginning? (y or n)
Starting program: 
/cygdrive/d/cegccsf/cegcc/cegcc/src/build-gdb_server/gdb/test/main.exe
Loaded symbols for /cygdrive/c/WINDOWS/system32/ntdll.dll
Loaded symbols for /cygdrive/c/WINDOWS/system32/kernel32.dll
Loaded symbols for /usr/bin/cygwin1.dll
Loaded symbols for /cygdrive/c/WINDOWS/system32/advapi32.dll
Loaded symbols for /cygdrive/c/WINDOWS/system32/rpcrt4.dll

Breakpoint 1, main (argc=1, argv=0x662f90) at main.c:12
(gdb) c
Continuing.

Breakpoint 2, function (a=21930) at main.c:6
(gdb)

Rings a bell?

Cheers,
Pedro Alves