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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/i386 | |
| 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/i386')
| -rw-r--r-- | sys/i386/i386/elf_machdep.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sys/i386/i386/elf_machdep.c b/sys/i386/i386/elf_machdep.c index 81d6e35..376dd0b 100644 --- a/sys/i386/i386/elf_machdep.c +++ b/sys/i386/i386/elf_machdep.c @@ -81,7 +81,8 @@ struct sysentvec elf32_freebsd_sysvec = { .sv_setregs = exec_setregs, .sv_fixlimit = NULL, .sv_maxssiz = NULL, - .sv_flags = SV_ABI_FREEBSD | SV_IA32 | SV_ILP32 | SV_SHP, + .sv_flags = SV_ABI_FREEBSD | SV_IA32 | SV_ILP32 | SV_SHP | + SV_TIMEKEEP, .sv_set_syscall_retval = cpu_set_syscall_retval, .sv_fetch_syscall_args = cpu_fetch_syscall_args, .sv_syscallnames = syscallnames, |
