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| author | kib <kib@FreeBSD.org> | 2015-11-23 07:09:35 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2015-11-23 07:09:35 +0000 |
| commit | e0c4faece4ce54570904909a5ede55c60f35fe5f (patch) | |
| tree | 86f12545db0b9e76efce54eb215d79ed458d2be6 /sys/sys/sysent.h | |
| parent | d427e0a9ba651eeab98ce6516fef233ea7041714 (diff) | |
| download | FreeBSD-src-e0c4faece4ce54570904909a5ede55c60f35fe5f.zip FreeBSD-src-e0c4faece4ce54570904909a5ede55c60f35fe5f.tar.gz | |
Split kerne timekeep ABI structure vdso_sv_tk out of the struct
sysentvec. This allows the timekeep data to be shared between similar
ABIs which cannot share sysentvec.
Make the timekeep_push_vdso() tick callback to the timekeep structures
instead of sysentvecs. If several sysentvec share the vdso_sv_tk
structure, we would update the userspace data several times on each
tick, without the change.
Only allocate vdso_sv_tk in the exec_sysvec_init() sysinit when
sysentvec is marked with the new SV_TIMEKEEP flag. This saves
allocation and update of unneeded vdso_sv_tk for ABIs which do not
provide userspace gettimeofday yet, which are PowerPCs arches right
now.
Make vdso_sv_tk allocator public, namely split out and export
alloc_sv_tk() and alloc_sv_tk_compat32(). ABIs which share timekeep
data now can allocate it manually and share as appropriate.
Requested by: nwhitehorn
Tested by: nwhitehorn, pho
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Diffstat (limited to 'sys/sys/sysent.h')
| -rw-r--r-- | sys/sys/sysent.h | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/sys/sys/sysent.h b/sys/sys/sysent.h index db92981..7e25ee4 100644 --- a/sys/sys/sysent.h +++ b/sys/sys/sysent.h @@ -127,13 +127,10 @@ struct sysentvec { int (*sv_fetch_syscall_args)(struct thread *, struct syscall_args *); const char **sv_syscallnames; + vm_offset_t sv_timekeep_base; vm_offset_t sv_shared_page_base; vm_offset_t sv_shared_page_len; vm_offset_t sv_sigcode_base; - vm_offset_t sv_timekeep_base; - int sv_timekeep_off; - int sv_timekeep_curr; - uint32_t sv_timekeep_gen; void *sv_shared_page_obj; void (*sv_schedtail)(struct thread *); void (*sv_thread_detach)(struct thread *); @@ -145,6 +142,7 @@ struct sysentvec { #define SV_AOUT 0x008000 /* a.out executable. */ #define SV_SHP 0x010000 /* Shared page. */ #define SV_CAPSICUM 0x020000 /* Force cap_enter() on startup. */ +#define SV_TIMEKEEP 0x040000 #define SV_ABI_MASK 0xff #define SV_PROC_FLAG(p, x) ((p)->p_sysent->sv_flags & (x)) @@ -274,6 +272,7 @@ int shared_page_alloc(int size, int align); int shared_page_fill(int size, int align, const void *data); void shared_page_write(int base, int size, const void *data); void exec_sysvec_init(void *param); +void exec_inittk(void); #define INIT_SYSENTVEC(name, sv) \ SYSINIT(name, SI_SUB_EXEC, SI_ORDER_ANY, \ |
