From d9838d86536fe17e76d19bf3e737100fae618396 Mon Sep 17 00:00:00 2001 From: Bodo Stroesser Date: Sat, 3 Sep 2005 15:57:51 -0700 Subject: [PATCH] [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 Signed-off-by: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/um/os-Linux/start_up.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) 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) { -- 2.41.0