cat t.cpp && aCC -V +DD32 t.cpp && file a.out && ./a.out
#include <stdio.h>
int main()
{
printf("%s", (char*)(void*)(0x0 - 1));
return 0;
}
aCC: HP ANSI C++ B3910B A.03.63
92453-07 linker command s800.sgs ld PA64 B.11.45 REL 050725
/usr/ccs/bin/ld: 92453-07 linker linker ld B.11.45 050725
a.out: PA-RISC1.1 shared executable dynamically linked -not
stripped dynamically linked
Segmentation fault (core dumped)
aCC -V +DD64 t.cpp && file a.out && ./a.out
aCC: HP ANSI C++ B3910B A.03.63
92453-07 linker command s800.sgs ld PA64 B.11.45 REL 050725
a.out: ELF-64 executable object file - PA-RISC 2.0 (LP64)
Segmentation fault (core dumped)
cat t.cpp && aCC +DD32 t.cpp && file a.out && ./a.out
#include <stdio.h>
int main()
{
printf ("%s", (char*)(void*)(0x0 - 1));
return 0;
}
a.out: ELF-32 executable object file - IA64
Segmentation fault (core dumped)
cat t.cpp && aCC +DD64 t.cpp && file a.out && ./a.out
#include <stdio.h>
int main()
{
printf ("%s", (char*)(void*)(0x0 - 1));
return 0;
}
a.out: ELF-64 executable object file - IA64
Segmentation fault (core dumped)
-----Original Message-----
From: Martin Sebor [mailto:[EMAIL PROTECTED]
Sent: Tuesday, January 29, 2008 3:07 PM
To: [email protected]
Subject: Re: [PATCH] STDCXX-705
Scott Zhong wrote:
> I tried to access the red zone and a seg fault didn't occur
Odd.
> but when
> trying to access the kernel address space it does cause a seg fault.
What about the 32-bit address spaces, especially in the MPAS
model where the stack (supposedly) starts at 0xffffffff? And
what about HP-UX on PA-RISC?
Martin
> I
> propose to change 0.printf.cpp to the following:
>
> Index: 0.printf.cpp
> ===================================================================
> --- 0.printf.cpp (revision 616446)
> +++ 0.printf.cpp (working copy)
> @@ -165,15 +165,7 @@
> ++addr;
> }
> else {
> -
> -#ifndef _RWSTD_OS_HP_UX
> - // the first page is usually unmapped
> - addr = (char*)32;
> -#else
> - // the first page on HP-UX is readable, this might work
> - addr = (char*)(void*)bad_address + 1024 * 1024 * 16;
> -#endif // _RWSTD_OS_HP_UX
> -
> + addr = (char*)(void*)(0x0 - 1);
> }
>
> return addr;
>
