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[PATCH] uml: allow host capability usage to be disabled 

Add new cmdline setups:
  - noprocmm
  - noptracefaultinfo
In case of testing, they can be used to switch off usage of
/proc/mm and PTRACE_FAULTINFO independently.

Signed-off-by: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Bodo Stroesser 2005-09-03 15:57:51 -07:00 committed by Linus Torvalds
parent 07bf731e4b
commit d9838d8653
1 changed files with 24 additions and 0 deletions
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24
arch/um/os-Linux/start_up.c
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@ -275,6 +275,30 @@ void os_early_checks(void)
check_ptrace();
}
static int __init noprocmm_cmd_param(char *str, int* add)
{
proc_mm = 0;
return 0;
}
__uml_setup("noprocmm", noprocmm_cmd_param,
"noprocmm\n"
" Turns off usage of /proc/mm, even if host supports it.\n"
" To support /proc/mm, the host needs to be patched using\n"
" the current skas3 patch.\n\n");
static int __init noptracefaultinfo_cmd_param(char *str, int* add)
{
ptrace_faultinfo = 0;
return 0;
}
__uml_setup("noptracefaultinfo", noptracefaultinfo_cmd_param,
"noptracefaultinfo\n"
" Turns off usage of PTRACE_FAULTINFO, even if host supports\n"
" it. To support PTRACE_FAULTINFO, the host needs to be patched\n"
" using the current skas3 patch.\n\n");
#ifdef UML_CONFIG_MODE_SKAS
static inline void check_skas3_ptrace_support(void)
{