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runtime: move iOS kevent calls to libc

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Change-Id: Ie97c9c9163f5af7b4768c34faac726e21627aa79
Reviewed-on: https://go-review.googlesource.com/118660
Run-TryBot: Elias Naur <elias.naur@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Elias Naur 2018-06-13 18:21:23 +02:00 committed by Keith Randall
parent 72c29fc8cd
commit c824f540d9
4 changed files with 84 additions and 121 deletions
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3
src/runtime/defs_darwin_arm.go
View File

@ -125,6 +125,9 @@ const (
_EVFILT_WRITE = -0x2
_PTHREAD_CREATE_DETACHED = 0x2
_F_SETFD = 0x2
_FD_CLOEXEC = 0x1
)
type machbody struct {

3
src/runtime/defs_darwin_arm64.go
View File

@ -123,6 +123,9 @@ const (
_EVFILT_WRITE = -0x2
_PTHREAD_CREATE_DETACHED = 0x2
_F_SETFD = 0x2
_FD_CLOEXEC = 0x1
)
type machbody struct {

102
src/runtime/sys_darwin_arm.s
View File

@ -10,19 +10,6 @@
#include "go_tls.h"
#include "textflag.h"
// Copied from /usr/include/sys/syscall.h
#define SYS_gettimeofday 116
#define SYS_kill 37
#define SYS_getpid 20
#define SYS_pthread_sigmask 329
#define SYS_setitimer 83
#define SYS___sysctl 202
#define SYS_sigaction 46
#define SYS_sigreturn 184
#define SYS_kqueue 362
#define SYS_kevent 363
#define SYS_fcntl 92
TEXT notok<>(SB),NOSPLIT,$0
MOVW $0, R8
MOVW R8, (R8)
@ -114,12 +101,11 @@ TEXT runtime·madvise_trampoline(SB),NOSPLIT,$0
BL.EQ notok<>(SB)
RET
TEXT runtime·setitimer(SB),NOSPLIT,$0
MOVW mode+0(FP), R0
MOVW new+4(FP), R1
MOVW old+8(FP), R2
MOVW $SYS_setitimer, R12
SWI $0x80
TEXT runtime·setitimer_trampoline(SB),NOSPLIT,$0
MOVW 4(R0), R1 // arg 2 new
MOVW 8(R0), R2 // arg 3 old
MOVW 0(R0), R0 // arg 1 which
BL libc_setitimer(SB)
RET
TEXT runtime·walltime_trampoline(SB),NOSPLIT,$0
@ -265,22 +251,18 @@ TEXT runtime·usleep_trampoline(SB),NOSPLIT,$0
TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
B runtime·armPublicationBarrier(SB)
TEXT runtime·sysctl(SB),NOSPLIT,$0
MOVW mib+0(FP), R0
MOVW miblen+4(FP), R1
MOVW out+8(FP), R2
MOVW size+12(FP), R3
MOVW dst+16(FP), R4
MOVW ndst+20(FP), R5
MOVW $SYS___sysctl, R12 // syscall entry
SWI $0x80
BCC sysctl_ret
RSB $0, R0, R0
MOVW R0, ret+24(FP)
RET
sysctl_ret:
MOVW $0, R0
MOVW R0, ret+24(FP)
TEXT runtime·sysctl_trampoline(SB),NOSPLIT,$0
MOVW 4(R0), R1 // arg 2 miblen
MOVW 8(R0), R2 // arg 3 out
MOVW 12(R0), R3 // arg 4 size
MOVW 16(R0), R4 // arg 5 dst
MOVW 20(R0), R5 // arg 6 ndst
MOVW 0(R0), R0 // arg 1 mib
// Only R0-R3 are used for arguments, the rest
// go on the stack.
MOVM.DB.W [R4-R5], (R13)
BL libc_sysctl(SB)
ADD $(2*4), R13
RET
// uint32 mach_msg_trap(void*, uint32, uint32, uint32, uint32, uint32, uint32)
@ -352,35 +334,37 @@ TEXT runtime·mach_semaphore_signal_all(SB),NOSPLIT,$0
MOVW R0, ret+4(FP)
RET
// int32 runtime·kqueue(void)
TEXT runtime·kqueue(SB),NOSPLIT,$0
MOVW $SYS_kqueue, R12
SWI $0x80
RSB.CS $0, R0, R0
MOVW R0, ret+0(FP)
TEXT runtime·kqueue_trampoline(SB),NOSPLIT,$0
BL libc_kqueue(SB)
RET
// int32 runtime·kevent(int kq, Kevent *changelist, int nchanges, Kevent *eventlist, int events, Timespec *timeout)
TEXT runtime·kevent(SB),NOSPLIT,$0
MOVW $SYS_kevent, R12
MOVW kq+0(FP), R0
MOVW ch+4(FP), R1
MOVW nch+8(FP), R2
MOVW ev+12(FP), R3
MOVW nev+16(FP), R4
MOVW ts+20(FP), R5
SWI $0x80
RSB.CS $0, R0, R0
MOVW R0, ret+24(FP)
TEXT runtime·kevent_trampoline(SB),NOSPLIT,$0
MOVW 4(R0), R1 // arg 2 keventss
MOVW 8(R0), R2 // arg 3 nch
MOVW 12(R0), R3 // arg 4 ev
MOVW 16(R0), R4 // arg 5 nev
MOVW 20(R0), R5 // arg 6 ts
MOVW 0(R0), R0 // arg 1 kq
// Only R0-R3 are used for arguments, the rest
// go on the stack.
MOVM.DB.W [R4-R5], (R13)
BL libc_kevent(SB)
ADD $(2*4), R13
MOVW $-1, R2
CMP R0, R2
BNE ok
BL libc_error(SB)
MOVW (R0), R0 // errno
RSB $0, R0, R0 // caller wants it as a negative error code
ok:
RET
// int32 runtime·closeonexec(int32 fd)
TEXT runtime·closeonexec(SB),NOSPLIT,$0
MOVW $SYS_fcntl, R12
MOVW fd+0(FP), R0
MOVW $2, R1 // F_SETFD
MOVW $1, R2 // FD_CLOEXEC
SWI $0x80
TEXT runtime·fcntl_trampoline(SB),NOSPLIT,$0
MOVW 4(R0), R1 // arg 2 cmd
MOVW 8(R0), R2 // arg 3 arg
MOVW 0(R0), R0 // arg 1 fd
BL libc_fcntl(SB)
RET
// sigaltstack is not supported on iOS, so our sigtramp has

97
src/runtime/sys_darwin_arm64.s
View File

@ -10,19 +10,6 @@
#include "go_tls.h"
#include "textflag.h"
// Copied from /usr/include/sys/syscall.h
#define SYS_gettimeofday 116
#define SYS_kill 37
#define SYS_getpid 20
#define SYS_pthread_sigmask 329
#define SYS_setitimer 83
#define SYS___sysctl 202
#define SYS_sigaction 46
#define SYS_sigreturn 184
#define SYS_kqueue 362
#define SYS_kevent 363
#define SYS_fcntl 92
TEXT notok<>(SB),NOSPLIT,$0
MOVD $0, R8
MOVD R8, (R8)
@ -106,12 +93,11 @@ TEXT runtime·madvise_trampoline(SB),NOSPLIT,$0
BL libc_madvise(SB)
RET
TEXT runtime·setitimer(SB),NOSPLIT,$0
MOVW mode+0(FP), R0
MOVD new+8(FP), R1
MOVD old+16(FP), R2
MOVW $SYS_setitimer, R16
SVC $0x80
TEXT runtime·setitimer_trampoline(SB),NOSPLIT,$0
MOVD 8(R0), R1 // arg 2 new
MOVD 16(R0), R2 // arg 3 old
MOVW 0(R0), R0 // arg 1 which
BL libc_setitimer(SB)
RET
TEXT runtime·walltime_trampoline(SB),NOSPLIT,$0
@ -262,22 +248,14 @@ TEXT runtime·usleep_trampoline(SB),NOSPLIT,$0
BL libc_usleep(SB)
RET
TEXT runtime·sysctl(SB),NOSPLIT,$0
MOVD mib+0(FP), R0
MOVW miblen+8(FP), R1
MOVD out+16(FP), R2
MOVD size+24(FP), R3
MOVD dst+32(FP), R4
MOVD ndst+40(FP), R5
MOVW $SYS___sysctl, R16
SVC $0x80
BCC ok
NEG R0, R0
MOVW R0, ret+48(FP)
RET
ok:
MOVW $0, R0
MOVW R0, ret+48(FP)
TEXT runtime·sysctl_trampoline(SB),NOSPLIT,$0
MOVW 8(R0), R1 // arg 2 miblen
MOVD 16(R0), R2 // arg 3 out
MOVD 24(R0), R3 // arg 4 size
MOVD 32(R0), R4 // arg 5 dst
MOVD 40(R0), R5 // arg 6 ndst
MOVD 0(R0), R0 // arg 1 mib
BL libc_sysctl(SB)
RET
// uint32 mach_msg_trap(void*, uint32, uint32, uint32, uint32, uint32, uint32)
@ -349,37 +327,32 @@ TEXT runtime·mach_semaphore_signal_all(SB),NOSPLIT,$0
MOVW R0, ret+8(FP)
RET
// int32 runtime·kqueue(void)
TEXT runtime·kqueue(SB),NOSPLIT,$0
MOVW $SYS_kqueue, R16
SVC $0x80
BCC 2(PC)
NEG R0, R0
MOVW R0, ret+0(FP)
TEXT runtime·kqueue_trampoline(SB),NOSPLIT,$0
BL libc_kqueue(SB)
RET
// int32 runtime·kevent(int kq, Kevent *ch, int nch, Kevent *ev, int nev, Timespec *ts)
TEXT runtime·kevent(SB),NOSPLIT,$0
MOVW kq+0(FP), R0
MOVD ch+8(FP), R1
MOVW nch+16(FP), R2
MOVD ev+24(FP), R3
MOVW nev+32(FP), R4
MOVD ts+40(FP), R5
MOVW $SYS_kevent, R16
SVC $0x80
BCC 2(PC)
NEG R0, R0
MOVW R0, ret+48(FP)
TEXT runtime·kevent_trampoline(SB),NOSPLIT,$0
MOVD 8(R0), R1 // arg 2 keventt
MOVW 16(R0), R2 // arg 3 nch
MOVD 24(R0), R3 // arg 4 ev
MOVW 32(R0), R4 // arg 5 nev
MOVD 40(R0), R5 // arg 6 ts
MOVW 0(R0), R0 // arg 1 kq
BL libc_kevent(SB)
MOVD $-1, R2
CMP R0, R2
BNE ok
BL libc_error(SB)
MOVD (R0), R0 // errno
NEG R0, R0 // caller wants it as a negative error code
ok:
RET
// int32 runtime·closeonexec(int32 fd)
TEXT runtime·closeonexec(SB),NOSPLIT,$0
MOVW fd+0(FP), R0
MOVW $2, R1 // F_SETFD
MOVW $1, R2 // FD_CLOEXEC
MOVW $SYS_fcntl, R16
SVC $0x80
TEXT runtime·fcntl_trampoline(SB),NOSPLIT,$0
MOVW 4(R0), R1 // arg 2 cmd
MOVW 8(R0), R2 // arg 3 arg
MOVW 0(R0), R0 // arg 1 fd
BL libc_fcntl(SB)
RET
// sigaltstack on iOS is not supported and will always