linux-kernel - sysenter cause a segmentation fault.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Sun, 18 Mar 2007 16:08:43 +0800
From:	"Ying Chu" <xjtuychu@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: sysenter cause a segmentation fault.

A simple code running on PIII 800,kernel 2.6.20 with SEP enabled
causes  a  segmentation fault.
The slice is as following.

#include <stdio.h>
#include <sys/syacall.h>

int main()
{
    unsigned long ret=0;
    __asm__ __volatile__ ("movl %1,%%eax\n\tpushl %%ecx\n\t"
     "pushl %%edx\n\tpush %%ebp\n\t"
     "movl %%esp,%%ebp\n\t"     "sysenter\n\t"
     "movl %%eax,%0"
     :"=m"(ret)
     :"b"(SYS_getuid));
   printf("%d\n",ret);
   return 0;
}

More, when i enabled Kdb and set "bp sysenter_entry",it went with a
catastrophic error errupted.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/