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authorBodo Stroesser <bstroesser@fujitsu-siemens.com>2005-09-03 15:57:51 -0700
committerLinus Torvalds <torvalds@evo.osdl.org>2005-09-05 00:06:24 -0700
commitd9838d86536fe17e76d19bf3e737100fae618396 (patch)
treed4609ec951f07bb1df284719eca0ed779992245e /arch/um/os-Linux
parent07bf731e4b95d7c9ea9dbacd1fc4a041120dfffb (diff)
[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>
Diffstat (limited to 'arch/um/os-Linux')
-rw-r--r--arch/um/os-Linux/start_up.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c
index a3eab25f379..a8b5b9d9c6e 100644
--- a/arch/um/os-Linux/start_up.c
+++ b/arch/um/os-Linux/start_up.c
@@ -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)
{