Program not being executed at all

[Alejandro Pulver]

On Sat, 30 Dec 2006 16:31:03 +0200
Kostik Belousov <kostikbel at gmail.com> wrote:

[...]
> > > > Interestingly 'ldd' also crashes when examining it, outputting the
> > > > following (however 'ktrace' has more information):
> > > > 
> > > > /usr/local/bin/quake2max:
> > > > /usr/local/bin/quake2max: signal 6
> > > > 
[...]
> > > Please, show the output of the commands
> > > file /usr/local/bin/quake2max
> > > readelf -ld /usr/local/bin/quake2max
> > > 
[...]
> Signal 6 is sent by elf image activator upon exec() when old address space
> is destroyed, but new image cannot be loaded. In your case, I guess that
> extra large bss section size (where uninitialized global/static variables
> are placed) causes loader to fail:
> 
> >   Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz  Flg Align
> >   LOAD           0x073000 0x080bb000 0x080bb000 0x02cc4 0x28a20e34 RW  0x1000
> 
> Look at MemSiz column. VirtAddr + MemSiz >= 0x30000000, and elf interpreter
> (/libexec/ld-elf.so.1) is usually mmapped at 0x28000000.
> 
> Look at the source for huge global arrays/objects.

Hello.

Thank you very much for your help, I have found the array; see below.

I searched the diff for increments in the macros (it has many global
arrays of a size defined with '#define') and the only thing I could
find is the following:

-#define MAX_DECAL_FRAGMENTS 32
+#define MAX_DECAL_FRAGMENTS 64

But the problem is here:

#define MAX_PARTICLES 4096

typedef struct particle_s
{
/* skip */
	decalpolys_t	decal[MAX_DECAL_FRAGMENTS];
/* skip */
} cparticle_t;

cparticle_t particles[MAX_PARTICLES];

The size of the cparticle_t type is 68 in my machine. So 68*32*4096 =
8912896, and in the new version it was doubled to 17825792.

I have changed the definition back to 32, and now 'readelf' reports the
size has been reduced considerably:

  LOAD           0x070000 0x080b8000 0x080b8000 0x03010 0x149a1954 RW  0x1000

BTW this works in Linux (I haven't tried myself but someone else told
me), so just for curiosity, does it allocate more memory for loading
programs?

Best Regards,
Ale
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