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Add sysent flag to switch to capabilities mode on startup.

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CloudABI processes should run in capabilities mode automatically. There
is no need to switch manually (e.g., by calling cap_enter()). Add a
flag, SV_CAPSICUM, that can be used to call into cap_enter() during
execve().

Reviewed by:	kib
This commit is contained in:
Ed Schouten 2015-08-03 13:41:47 +00:00
parent f94cc23475
commit 39f5ebb774
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=286229
2 changed files with 10 additions and 5 deletions
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4
sys/kern/kern_exec.c
View File

@ -562,6 +562,10 @@ do_execve(td, args, mac_p)
goto exec_fail_dealloc;
}
/* ABI enforces the use of Capsicum. Switch into capabilities mode. */
if (SV_PROC_FLAG(p, SV_CAPSICUM))
sys_cap_enter(td, NULL);
/*
* Copy out strings (args and env) and initialize stack base
*/

11
sys/sys/sysent.h
View File

@ -139,11 +139,12 @@ struct sysentvec {
void (*sv_thread_detach)(struct thread *);
};
#define SV_ILP32 0x000100
#define SV_LP64 0x000200
#define SV_IA32 0x004000
#define SV_AOUT 0x008000
#define SV_SHP 0x010000
#define SV_ILP32 0x000100 /* 32-bit executable. */
#define SV_LP64 0x000200 /* 64-bit executable. */
#define SV_IA32 0x004000 /* Intel 32-bit executable. */
#define SV_AOUT 0x008000 /* a.out executable. */
#define SV_SHP 0x010000 /* Shared page. */
#define SV_CAPSICUM 0x020000 /* Force cap_enter() on startup. */
#define SV_ABI_MASK 0xff
#define SV_PROC_FLAG(p, x) ((p)->p_sysent->sv_flags & (x))