mirror of
https://github.com/golang/go
synced 2024-11-18 06:04:53 -07:00
runtime, syscall: correct openbsd/arm and openbsd/arm64 syscalls for OpenBSD 6.7
Add two no op instructions following svc on openbsd/arm64 and swi on openbsd/arm. All except some of the most recent arm64 processors have a speculative execution flaw that occurs across a syscall boundary, which cannot be mitigated in the kernel. In order to protect against this leak a speculation barrier needs to be placed after an svc or swi instruction. In order to avoid the performance impact of these instructions, the OpenBSD 6.7 kernel returns execution two instructions past the svc or swi call. For now two hardware no ops are added, which allows syscalls to work with both 6.6 and 6.7. These should be replaced with real speculation barriers once OpenBSD 6.8 is released. Updates #36435 Change-Id: I06153cb0998199242cca8761450e53599c3e7de4 Reviewed-on: https://go-review.googlesource.com/c/go/+/234381 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Joel Sing
parent
bcda68447b
commit
20160b37c6
@ -4,6 +4,12 @@
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#include "textflag.h"
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// See comment in runtime/sys_openbsd_arm64.s re this construction.
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#define INVOKE_SYSCALL \
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SVC; \
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NOOP; \
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NOOP
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TEXT _rt0_arm64_openbsd(SB),NOSPLIT|NOFRAME,$0
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MOVD 0(RSP), R0 // argc
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ADD $8, RSP, R1 // argv
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@ -101,5 +107,5 @@ TEXT main(SB),NOSPLIT|NOFRAME,$0
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exit:
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MOVD $0, R0
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MOVD $1, R8 // sys_exit
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SVC
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INVOKE_SYSCALL
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B exit
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@ -13,11 +13,23 @@
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#define CLOCK_REALTIME $0
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#define CLOCK_MONOTONIC $3
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// With OpenBSD 6.7 onwards, an armv7 syscall returns two instructions
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// after the SWI instruction, to allow for a speculative execution
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// barrier to be placed after the SWI without impacting performance.
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// For now use hardware no-ops as this works with both older and newer
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// kernels. After OpenBSD 6.8 is released this should be changed to
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// speculation barriers.
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#define NOOP MOVW R0, R0
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#define INVOKE_SYSCALL \
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SWI $0; \
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NOOP; \
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NOOP
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// Exit the entire program (like C exit)
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TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0
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MOVW code+0(FP), R0 // arg 1 - status
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MOVW $1, R12 // sys_exit
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SWI $0
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INVOKE_SYSCALL
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MOVW.CS $0, R8 // crash on syscall failure
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MOVW.CS R8, (R8)
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RET
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@ -26,7 +38,7 @@ TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0
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TEXT runtime·exitThread(SB),NOSPLIT,$0-4
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MOVW wait+0(FP), R0 // arg 1 - notdead
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MOVW $302, R12 // sys___threxit
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SWI $0
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INVOKE_SYSCALL
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MOVW.CS $1, R8 // crash on syscall failure
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MOVW.CS R8, (R8)
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JMP 0(PC)
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@ -36,7 +48,7 @@ TEXT runtime·open(SB),NOSPLIT|NOFRAME,$0
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MOVW mode+4(FP), R1 // arg 2 - mode
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MOVW perm+8(FP), R2 // arg 3 - perm
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MOVW $5, R12 // sys_open
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SWI $0
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INVOKE_SYSCALL
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MOVW.CS $-1, R0
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MOVW R0, ret+12(FP)
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RET
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@ -44,7 +56,7 @@ TEXT runtime·open(SB),NOSPLIT|NOFRAME,$0
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TEXT runtime·closefd(SB),NOSPLIT|NOFRAME,$0
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MOVW fd+0(FP), R0 // arg 1 - fd
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MOVW $6, R12 // sys_close
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SWI $0
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INVOKE_SYSCALL
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MOVW.CS $-1, R0
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MOVW R0, ret+4(FP)
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RET
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@ -54,7 +66,7 @@ TEXT runtime·read(SB),NOSPLIT|NOFRAME,$0
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MOVW p+4(FP), R1 // arg 2 - buf
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MOVW n+8(FP), R2 // arg 3 - nbyte
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MOVW $3, R12 // sys_read
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SWI $0
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INVOKE_SYSCALL
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RSB.CS $0, R0 // caller expects negative errno
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MOVW R0, ret+12(FP)
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RET
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@ -63,7 +75,7 @@ TEXT runtime·read(SB),NOSPLIT|NOFRAME,$0
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TEXT runtime·pipe(SB),NOSPLIT,$0-12
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MOVW $r+0(FP), R0
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MOVW $263, R12
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SWI $0
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INVOKE_SYSCALL
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MOVW R0, errno+8(FP)
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RET
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@ -72,7 +84,7 @@ TEXT runtime·pipe2(SB),NOSPLIT,$0-16
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MOVW $r+4(FP), R0
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MOVW flags+0(FP), R1
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MOVW $101, R12
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SWI $0
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INVOKE_SYSCALL
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MOVW R0, errno+12(FP)
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RET
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@ -81,7 +93,7 @@ TEXT runtime·write1(SB),NOSPLIT|NOFRAME,$0
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MOVW p+4(FP), R1 // arg 2 - buf
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MOVW n+8(FP), R2 // arg 3 - nbyte
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MOVW $4, R12 // sys_write
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SWI $0
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INVOKE_SYSCALL
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RSB.CS $0, R0 // caller expects negative errno
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MOVW R0, ret+12(FP)
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RET
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@ -99,12 +111,12 @@ TEXT runtime·usleep(SB),NOSPLIT,$16
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MOVW $4(R13), R0 // arg 1 - rqtp
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MOVW $0, R1 // arg 2 - rmtp
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MOVW $91, R12 // sys_nanosleep
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SWI $0
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INVOKE_SYSCALL
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RET
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TEXT runtime·getthrid(SB),NOSPLIT,$0-4
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MOVW $299, R12 // sys_getthrid
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SWI $0
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INVOKE_SYSCALL
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MOVW R0, ret+0(FP)
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RET
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@ -113,16 +125,16 @@ TEXT runtime·thrkill(SB),NOSPLIT,$0-8
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MOVW sig+4(FP), R1 // arg 2 - signum
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MOVW $0, R2 // arg 3 - tcb
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MOVW $119, R12 // sys_thrkill
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SWI $0
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INVOKE_SYSCALL
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RET
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TEXT runtime·raiseproc(SB),NOSPLIT,$12
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MOVW $20, R12
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SWI $0 // sys_getpid
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MOVW $20, R12 // sys_getpid
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INVOKE_SYSCALL
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// arg 1 - pid, already in R0
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MOVW sig+0(FP), R1 // arg 2 - signum
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MOVW $122, R12 // sys_kill
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SWI $0
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INVOKE_SYSCALL
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RET
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TEXT runtime·mmap(SB),NOSPLIT,$16
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@ -140,7 +152,7 @@ TEXT runtime·mmap(SB),NOSPLIT,$16
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MOVW R7, 16(R13) // high 32 bits
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ADD $4, R13
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MOVW $197, R12 // sys_mmap
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SWI $0
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INVOKE_SYSCALL
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SUB $4, R13
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MOVW $0, R1
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MOVW.CS R0, R1 // if error, move to R1
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@ -153,7 +165,7 @@ TEXT runtime·munmap(SB),NOSPLIT,$0
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MOVW addr+0(FP), R0 // arg 1 - addr
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MOVW n+4(FP), R1 // arg 2 - len
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MOVW $73, R12 // sys_munmap
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SWI $0
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INVOKE_SYSCALL
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MOVW.CS $0, R8 // crash on syscall failure
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MOVW.CS R8, (R8)
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RET
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@ -163,7 +175,7 @@ TEXT runtime·madvise(SB),NOSPLIT,$0
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MOVW n+4(FP), R1 // arg 2 - len
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MOVW flags+8(FP), R2 // arg 2 - flags
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MOVW $75, R12 // sys_madvise
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SWI $0
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INVOKE_SYSCALL
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MOVW.CS $-1, R0
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MOVW R0, ret+12(FP)
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RET
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@ -173,7 +185,7 @@ TEXT runtime·setitimer(SB),NOSPLIT,$0
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MOVW new+4(FP), R1 // arg 2 - new value
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MOVW old+8(FP), R2 // arg 3 - old value
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MOVW $69, R12 // sys_setitimer
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SWI $0
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INVOKE_SYSCALL
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RET
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// func walltime1() (sec int64, nsec int32)
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@ -181,7 +193,7 @@ TEXT runtime·walltime1(SB), NOSPLIT, $32
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MOVW CLOCK_REALTIME, R0 // arg 1 - clock_id
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MOVW $8(R13), R1 // arg 2 - tp
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MOVW $87, R12 // sys_clock_gettime
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SWI $0
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INVOKE_SYSCALL
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MOVW 8(R13), R0 // sec - l32
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MOVW 12(R13), R1 // sec - h32
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@ -199,7 +211,7 @@ TEXT runtime·nanotime1(SB),NOSPLIT,$32
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MOVW CLOCK_MONOTONIC, R0 // arg 1 - clock_id
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MOVW $8(R13), R1 // arg 2 - tp
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MOVW $87, R12 // sys_clock_gettime
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SWI $0
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INVOKE_SYSCALL
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MOVW 8(R13), R0 // sec - l32
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MOVW 12(R13), R4 // sec - h32
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@ -220,7 +232,7 @@ TEXT runtime·sigaction(SB),NOSPLIT,$0
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MOVW new+4(FP), R1 // arg 2 - new sigaction
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MOVW old+8(FP), R2 // arg 3 - old sigaction
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MOVW $46, R12 // sys_sigaction
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SWI $0
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INVOKE_SYSCALL
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MOVW.CS $3, R8 // crash on syscall failure
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MOVW.CS R8, (R8)
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RET
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@ -229,7 +241,7 @@ TEXT runtime·obsdsigprocmask(SB),NOSPLIT,$0
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MOVW how+0(FP), R0 // arg 1 - mode
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MOVW new+4(FP), R1 // arg 2 - new
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MOVW $48, R12 // sys_sigprocmask
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SWI $0
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INVOKE_SYSCALL
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MOVW.CS $3, R8 // crash on syscall failure
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MOVW.CS R8, (R8)
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MOVW R0, ret+8(FP)
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@ -280,7 +292,7 @@ TEXT runtime·tfork(SB),NOSPLIT,$0
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MOVW param+0(FP), R0 // arg 1 - param
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MOVW psize+4(FP), R1 // arg 2 - psize
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MOVW $8, R12 // sys___tfork
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SWI $0
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INVOKE_SYSCALL
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// Return if syscall failed.
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B.CC 4(PC)
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@ -313,14 +325,14 @@ TEXT runtime·sigaltstack(SB),NOSPLIT,$0
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MOVW new+0(FP), R0 // arg 1 - new sigaltstack
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MOVW old+4(FP), R1 // arg 2 - old sigaltstack
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MOVW $288, R12 // sys_sigaltstack
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SWI $0
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INVOKE_SYSCALL
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MOVW.CS $0, R8 // crash on syscall failure
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MOVW.CS R8, (R8)
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RET
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TEXT runtime·osyield(SB),NOSPLIT,$0
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MOVW $298, R12 // sys_sched_yield
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SWI $0
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INVOKE_SYSCALL
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RET
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TEXT runtime·thrsleep(SB),NOSPLIT,$4
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@ -332,7 +344,7 @@ TEXT runtime·thrsleep(SB),NOSPLIT,$4
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MOVW R4, 4(R13)
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ADD $4, R13
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MOVW $94, R12 // sys___thrsleep
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SWI $0
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INVOKE_SYSCALL
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SUB $4, R13
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MOVW R0, ret+20(FP)
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RET
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@ -341,7 +353,7 @@ TEXT runtime·thrwakeup(SB),NOSPLIT,$0
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MOVW ident+0(FP), R0 // arg 1 - ident
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MOVW n+4(FP), R1 // arg 2 - n
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MOVW $301, R12 // sys___thrwakeup
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SWI $0
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INVOKE_SYSCALL
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MOVW R0, ret+8(FP)
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RET
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@ -356,7 +368,7 @@ TEXT runtime·sysctl(SB),NOSPLIT,$8
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MOVW R5, 8(R13)
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ADD $4, R13
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MOVW $202, R12 // sys___sysctl
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SWI $0
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INVOKE_SYSCALL
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SUB $4, R13
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MOVW.CC $0, R0
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RSB.CS $0, R0
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@ -366,7 +378,7 @@ TEXT runtime·sysctl(SB),NOSPLIT,$8
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// int32 runtime·kqueue(void);
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TEXT runtime·kqueue(SB),NOSPLIT,$0
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MOVW $269, R12 // sys_kqueue
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SWI $0
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INVOKE_SYSCALL
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RSB.CS $0, R0
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MOVW R0, ret+0(FP)
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RET
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@ -383,7 +395,7 @@ TEXT runtime·kevent(SB),NOSPLIT,$8
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MOVW R5, 8(R13)
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ADD $4, R13
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MOVW $72, R12 // sys_kevent
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SWI $0
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INVOKE_SYSCALL
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RSB.CS $0, R0
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SUB $4, R13
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MOVW R0, ret+24(FP)
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@ -395,7 +407,7 @@ TEXT runtime·closeonexec(SB),NOSPLIT,$0
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MOVW $2, R1 // arg 2 - cmd (F_SETFD)
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MOVW $1, R2 // arg 3 - arg (FD_CLOEXEC)
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MOVW $92, R12 // sys_fcntl
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SWI $0
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INVOKE_SYSCALL
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RET
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// func runtime·setNonblock(fd int32)
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@ -404,12 +416,12 @@ TEXT runtime·setNonblock(SB),NOSPLIT,$0-4
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MOVW $3, R1 // F_GETFL
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MOVW $0, R2
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MOVW $92, R12
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SWI $0
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INVOKE_SYSCALL
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ORR $0x4, R0, R2 // O_NONBLOCK
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MOVW fd+0(FP), R0 // fd
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MOVW $4, R1 // F_SETFL
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MOVW $92, R12
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SWI $0
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INVOKE_SYSCALL
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RET
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TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
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@ -418,6 +430,6 @@ TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
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TEXT runtime·read_tls_fallback(SB),NOSPLIT|NOFRAME,$0
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MOVM.WP [R1, R2, R3, R12], (R13)
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MOVW $330, R12 // sys___get_tcb
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SWI $0
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INVOKE_SYSCALL
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MOVM.IAW (R13), [R1, R2, R3, R12]
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RET
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@ -13,11 +13,22 @@
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#define CLOCK_REALTIME $0
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#define CLOCK_MONOTONIC $3
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// With OpenBSD 6.7 onwards, an arm64 syscall returns two instructions
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// after the SVC instruction, to allow for a speculative execution
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// barrier to be placed after the SVC without impacting performance.
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// For now use hardware no-ops as this works with both older and newer
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// kernels. After OpenBSD 6.8 is released this should be changed to
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// speculation barriers.
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#define INVOKE_SYSCALL \
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SVC; \
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NOOP; \
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NOOP
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// Exit the entire program (like C exit)
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TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0
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MOVW code+0(FP), R0 // arg 1 - status
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MOVD $1, R8 // sys_exit
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SVC
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INVOKE_SYSCALL
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BCC 3(PC)
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MOVD $0, R0 // crash on syscall failure
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MOVD R0, (R0)
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@ -27,7 +38,7 @@ TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0
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TEXT runtime·exitThread(SB),NOSPLIT,$0
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MOVD wait+0(FP), R0 // arg 1 - notdead
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MOVD $302, R8 // sys___threxit
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SVC
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INVOKE_SYSCALL
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MOVD $0, R0 // crash on syscall failure
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MOVD R0, (R0)
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JMP 0(PC)
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@ -37,7 +48,7 @@ TEXT runtime·open(SB),NOSPLIT|NOFRAME,$0
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MOVW mode+8(FP), R1 // arg 2 - mode
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MOVW perm+12(FP), R2 // arg 3 - perm
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MOVD $5, R8 // sys_open
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SVC
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INVOKE_SYSCALL
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BCC 2(PC)
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MOVW $-1, R0
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MOVW R0, ret+16(FP)
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@ -46,7 +57,7 @@ TEXT runtime·open(SB),NOSPLIT|NOFRAME,$0
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TEXT runtime·closefd(SB),NOSPLIT|NOFRAME,$0
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MOVW fd+0(FP), R0 // arg 1 - fd
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MOVD $6, R8 // sys_close
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SVC
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INVOKE_SYSCALL
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BCC 2(PC)
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MOVW $-1, R0
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MOVW R0, ret+8(FP)
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@ -57,7 +68,7 @@ TEXT runtime·read(SB),NOSPLIT|NOFRAME,$0
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MOVD p+8(FP), R1 // arg 2 - buf
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MOVW n+16(FP), R2 // arg 3 - nbyte
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MOVD $3, R8 // sys_read
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SVC
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INVOKE_SYSCALL
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BCC 2(PC)
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NEG R0, R0
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MOVW R0, ret+24(FP)
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@ -68,7 +79,7 @@ TEXT runtime·pipe(SB),NOSPLIT|NOFRAME,$0-12
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MOVD $r+0(FP), R0
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MOVW $0, R1
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MOVD $101, R8 // sys_pipe2
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SVC
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INVOKE_SYSCALL
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BCC 2(PC)
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NEG R0, R0
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MOVW R0, errno+8(FP)
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@ -79,7 +90,7 @@ TEXT runtime·pipe2(SB),NOSPLIT|NOFRAME,$0-20
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MOVD $r+8(FP), R0
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MOVW flags+0(FP), R1
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MOVD $101, R8 // sys_pipe2
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SVC
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INVOKE_SYSCALL
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BCC 2(PC)
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NEG R0, R0
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MOVW R0, errno+16(FP)
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@ -90,7 +101,7 @@ TEXT runtime·write1(SB),NOSPLIT|NOFRAME,$0
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MOVD p+8(FP), R1 // arg 2 - buf
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MOVW n+16(FP), R2 // arg 3 - nbyte
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MOVD $4, R8 // sys_write
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SVC
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INVOKE_SYSCALL
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BCC 2(PC)
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NEG R0, R0
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MOVW R0, ret+24(FP)
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@ -111,12 +122,12 @@ TEXT runtime·usleep(SB),NOSPLIT,$24-4
|
||||
ADD $8, RSP, R0 // arg 1 - rqtp
|
||||
MOVD $0, R1 // arg 2 - rmtp
|
||||
MOVD $91, R8 // sys_nanosleep
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
RET
|
||||
|
||||
TEXT runtime·getthrid(SB),NOSPLIT,$0-4
|
||||
MOVD $299, R8 // sys_getthrid
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
MOVW R0, ret+0(FP)
|
||||
RET
|
||||
|
||||
@ -125,16 +136,16 @@ TEXT runtime·thrkill(SB),NOSPLIT,$0-16
|
||||
MOVD sig+8(FP), R1 // arg 2 - signum
|
||||
MOVW $0, R2 // arg 3 - tcb
|
||||
MOVD $119, R8 // sys_thrkill
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
RET
|
||||
|
||||
TEXT runtime·raiseproc(SB),NOSPLIT,$0
|
||||
MOVD $20, R8 // sys_getpid
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
// arg 1 - pid, already in R0
|
||||
MOVW sig+0(FP), R1 // arg 2 - signum
|
||||
MOVD $122, R8 // sys_kill
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
RET
|
||||
|
||||
TEXT runtime·mmap(SB),NOSPLIT,$0
|
||||
@ -146,7 +157,7 @@ TEXT runtime·mmap(SB),NOSPLIT,$0
|
||||
MOVW $0, R5 // arg 6 - pad
|
||||
MOVW off+28(FP), R6 // arg 7 - offset
|
||||
MOVD $197, R8 // sys_mmap
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
MOVD $0, R1
|
||||
BCC 3(PC)
|
||||
MOVD R0, R1 // if error, move to R1
|
||||
@ -159,7 +170,7 @@ TEXT runtime·munmap(SB),NOSPLIT,$0
|
||||
MOVD addr+0(FP), R0 // arg 1 - addr
|
||||
MOVD n+8(FP), R1 // arg 2 - len
|
||||
MOVD $73, R8 // sys_munmap
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
BCC 3(PC)
|
||||
MOVD $0, R0 // crash on syscall failure
|
||||
MOVD R0, (R0)
|
||||
@ -170,7 +181,7 @@ TEXT runtime·madvise(SB),NOSPLIT,$0
|
||||
MOVD n+8(FP), R1 // arg 2 - len
|
||||
MOVW flags+16(FP), R2 // arg 2 - flags
|
||||
MOVD $75, R8 // sys_madvise
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
BCC 2(PC)
|
||||
MOVW $-1, R0
|
||||
MOVW R0, ret+24(FP)
|
||||
@ -181,7 +192,7 @@ TEXT runtime·setitimer(SB),NOSPLIT,$0
|
||||
MOVD new+8(FP), R1 // arg 2 - new value
|
||||
MOVD old+16(FP), R2 // arg 3 - old value
|
||||
MOVD $69, R8 // sys_setitimer
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
RET
|
||||
|
||||
// func walltime1() (sec int64, nsec int32)
|
||||
@ -189,7 +200,7 @@ TEXT runtime·walltime1(SB), NOSPLIT, $32
|
||||
MOVW CLOCK_REALTIME, R0 // arg 1 - clock_id
|
||||
MOVD $8(RSP), R1 // arg 2 - tp
|
||||
MOVD $87, R8 // sys_clock_gettime
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
|
||||
MOVD 8(RSP), R0 // sec
|
||||
MOVD 16(RSP), R1 // nsec
|
||||
@ -204,7 +215,7 @@ TEXT runtime·nanotime1(SB),NOSPLIT,$32
|
||||
MOVW CLOCK_MONOTONIC, R0 // arg 1 - clock_id
|
||||
MOVD $8(RSP), R1 // arg 2 - tp
|
||||
MOVD $87, R8 // sys_clock_gettime
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
|
||||
MOVW 8(RSP), R3 // sec
|
||||
MOVW 16(RSP), R5 // nsec
|
||||
@ -220,7 +231,7 @@ TEXT runtime·sigaction(SB),NOSPLIT,$0
|
||||
MOVD new+8(FP), R1 // arg 2 - new sigaction
|
||||
MOVD old+16(FP), R2 // arg 3 - old sigaction
|
||||
MOVD $46, R8 // sys_sigaction
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
BCC 3(PC)
|
||||
MOVD $3, R0 // crash on syscall failure
|
||||
MOVD R0, (R0)
|
||||
@ -230,7 +241,7 @@ TEXT runtime·obsdsigprocmask(SB),NOSPLIT,$0
|
||||
MOVW how+0(FP), R0 // arg 1 - mode
|
||||
MOVW new+4(FP), R1 // arg 2 - new
|
||||
MOVD $48, R8 // sys_sigprocmask
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
BCC 3(PC)
|
||||
MOVD $3, R8 // crash on syscall failure
|
||||
MOVD R8, (R8)
|
||||
@ -314,7 +325,7 @@ TEXT runtime·tfork(SB),NOSPLIT,$0
|
||||
MOVD param+0(FP), R0 // arg 1 - param
|
||||
MOVD psize+8(FP), R1 // arg 2 - psize
|
||||
MOVD $8, R8 // sys___tfork
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
|
||||
// Return if syscall failed.
|
||||
BCC 4(PC)
|
||||
@ -344,7 +355,7 @@ TEXT runtime·sigaltstack(SB),NOSPLIT,$0
|
||||
MOVD new+0(FP), R0 // arg 1 - new sigaltstack
|
||||
MOVD old+8(FP), R1 // arg 2 - old sigaltstack
|
||||
MOVD $288, R8 // sys_sigaltstack
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
BCC 3(PC)
|
||||
MOVD $0, R8 // crash on syscall failure
|
||||
MOVD R8, (R8)
|
||||
@ -352,7 +363,7 @@ TEXT runtime·sigaltstack(SB),NOSPLIT,$0
|
||||
|
||||
TEXT runtime·osyield(SB),NOSPLIT,$0
|
||||
MOVD $298, R8 // sys_sched_yield
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
RET
|
||||
|
||||
TEXT runtime·thrsleep(SB),NOSPLIT,$0
|
||||
@ -362,7 +373,7 @@ TEXT runtime·thrsleep(SB),NOSPLIT,$0
|
||||
MOVD lock+24(FP), R3 // arg 4 - lock
|
||||
MOVD abort+32(FP), R4 // arg 5 - abort
|
||||
MOVD $94, R8 // sys___thrsleep
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
MOVW R0, ret+40(FP)
|
||||
RET
|
||||
|
||||
@ -370,7 +381,7 @@ TEXT runtime·thrwakeup(SB),NOSPLIT,$0
|
||||
MOVD ident+0(FP), R0 // arg 1 - ident
|
||||
MOVW n+8(FP), R1 // arg 2 - n
|
||||
MOVD $301, R8 // sys___thrwakeup
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
MOVW R0, ret+16(FP)
|
||||
RET
|
||||
|
||||
@ -382,7 +393,7 @@ TEXT runtime·sysctl(SB),NOSPLIT,$0
|
||||
MOVD dst+32(FP), R4 // arg 5 - dest
|
||||
MOVD ndst+40(FP), R5 // arg 6 - newlen
|
||||
MOVD $202, R8 // sys___sysctl
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
BCC 2(PC)
|
||||
NEG R0, R0
|
||||
MOVW R0, ret+48(FP)
|
||||
@ -391,7 +402,7 @@ TEXT runtime·sysctl(SB),NOSPLIT,$0
|
||||
// int32 runtime·kqueue(void);
|
||||
TEXT runtime·kqueue(SB),NOSPLIT,$0
|
||||
MOVD $269, R8 // sys_kqueue
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
BCC 2(PC)
|
||||
NEG R0, R0
|
||||
MOVW R0, ret+0(FP)
|
||||
@ -406,7 +417,7 @@ TEXT runtime·kevent(SB),NOSPLIT,$0
|
||||
MOVW nev+32(FP), R4 // arg 5 - nevents
|
||||
MOVD ts+40(FP), R5 // arg 6 - timeout
|
||||
MOVD $72, R8 // sys_kevent
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
BCC 2(PC)
|
||||
NEG R0, R0
|
||||
MOVW R0, ret+48(FP)
|
||||
@ -418,7 +429,7 @@ TEXT runtime·closeonexec(SB),NOSPLIT,$0
|
||||
MOVD $2, R1 // arg 2 - cmd (F_SETFD)
|
||||
MOVD $1, R2 // arg 3 - arg (FD_CLOEXEC)
|
||||
MOVD $92, R8 // sys_fcntl
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
RET
|
||||
|
||||
// func runtime·setNonblock(int32 fd)
|
||||
@ -427,11 +438,11 @@ TEXT runtime·setNonblock(SB),NOSPLIT|NOFRAME,$0-4
|
||||
MOVD $3, R1 // arg 2 - cmd (F_GETFL)
|
||||
MOVD $0, R2 // arg 3
|
||||
MOVD $92, R8 // sys_fcntl
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
MOVD $4, R2 // O_NONBLOCK
|
||||
ORR R0, R2 // arg 3 - flags
|
||||
MOVW fd+0(FP), R0 // arg 1 - fd
|
||||
MOVD $4, R1 // arg 2 - cmd (F_SETFL)
|
||||
MOVD $92, R8 // sys_fcntl
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
RET
|
||||
|
||||
@ -15,13 +15,20 @@
|
||||
// func RawSyscall(trap int32, a1, a2, a3 int32) (r1, r2, err int32);
|
||||
// func RawSyscall6(trap int32, a1, a2, a3, a4, a5, a6 int32) (r1, r2, err int32);
|
||||
|
||||
// See comment in runtime/sys_openbsd_arm.s re this construction.
|
||||
#define NOOP MOVW R0, R0
|
||||
#define INVOKE_SYSCALL \
|
||||
SWI $0; \
|
||||
NOOP; \
|
||||
NOOP
|
||||
|
||||
TEXT ·Syscall(SB),NOSPLIT,$0-28
|
||||
BL runtime·entersyscall(SB)
|
||||
MOVW trap+0(FP), R12 // syscall number
|
||||
MOVW a1+4(FP), R0 // arg 1
|
||||
MOVW a2+8(FP), R1 // arg 2
|
||||
MOVW a3+12(FP), R2 // arg 3
|
||||
SWI $0
|
||||
INVOKE_SYSCALL
|
||||
MOVW $0, R2
|
||||
BCS error
|
||||
MOVW R0, r1+16(FP) // ret 1
|
||||
@ -46,7 +53,7 @@ TEXT ·Syscall6(SB),NOSPLIT,$0-40
|
||||
MOVW a4+16(FP), R3 // arg 4
|
||||
MOVW R13, R4
|
||||
MOVW $a5+20(FP), R13 // arg 5 to arg 6 are passed on stack
|
||||
SWI $0
|
||||
INVOKE_SYSCALL
|
||||
MOVW R4, R13
|
||||
MOVW $0, R2
|
||||
BCS error6
|
||||
@ -72,7 +79,7 @@ TEXT ·Syscall9(SB),NOSPLIT,$0-52
|
||||
MOVW a4+16(FP), R3 // arg 4
|
||||
MOVW R13, R4
|
||||
MOVW $a5+20(FP), R13 // arg 5 to arg 9 are passed on stack
|
||||
SWI $0
|
||||
INVOKE_SYSCALL
|
||||
MOVW R4, R13
|
||||
MOVW $0, R2
|
||||
BCS error9
|
||||
@ -94,7 +101,7 @@ TEXT ·RawSyscall(SB),NOSPLIT,$0-28
|
||||
MOVW a1+4(FP), R0 // arg 1
|
||||
MOVW a2+8(FP), R1 // arg 2
|
||||
MOVW a3+12(FP), R2 // arg 3
|
||||
SWI $0
|
||||
INVOKE_SYSCALL
|
||||
MOVW $0, R2
|
||||
BCS errorr
|
||||
MOVW R0, r1+16(FP) // ret 1
|
||||
@ -116,7 +123,7 @@ TEXT ·RawSyscall6(SB),NOSPLIT,$0-40
|
||||
MOVW a4+16(FP), R3 // arg 4
|
||||
MOVW R13, R4
|
||||
MOVW $a5+20(FP), R13 // arg 5 to arg 6 are passed on stack
|
||||
SWI $0
|
||||
INVOKE_SYSCALL
|
||||
MOVW R4, R13
|
||||
MOVW $0, R2
|
||||
BCS errorr6
|
||||
|
||||
@ -4,6 +4,12 @@
|
||||
|
||||
#include "textflag.h"
|
||||
|
||||
// See comment in runtime/sys_openbsd_arm64.s re this construction.
|
||||
#define INVOKE_SYSCALL \
|
||||
SVC; \
|
||||
NOOP; \
|
||||
NOOP
|
||||
|
||||
// func Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64);
|
||||
TEXT ·Syscall(SB),NOSPLIT,$0-56
|
||||
BL runtime·entersyscall(SB)
|
||||
@ -14,7 +20,7 @@ TEXT ·Syscall(SB),NOSPLIT,$0-56
|
||||
MOVD $0, R4
|
||||
MOVD $0, R5
|
||||
MOVD trap+0(FP), R8 // syscall number
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
BCC ok
|
||||
MOVD $-1, R4
|
||||
MOVD R4, r1+32(FP) // r1
|
||||
@ -38,7 +44,7 @@ TEXT ·Syscall6(SB),NOSPLIT,$0-80
|
||||
MOVD a5+40(FP), R4
|
||||
MOVD a6+48(FP), R5
|
||||
MOVD trap+0(FP), R8 // syscall number
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
BCC ok
|
||||
MOVD $-1, R4
|
||||
MOVD R4, r1+56(FP) // r1
|
||||
@ -66,7 +72,7 @@ TEXT ·Syscall9(SB),NOSPLIT,$0-104
|
||||
MOVD a9+72(FP), R8 // on stack
|
||||
MOVD R8, 8(RSP)
|
||||
MOVD num+0(FP), R8 // syscall number
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
BCC ok
|
||||
MOVD $-1, R4
|
||||
MOVD R4, r1+80(FP) // r1
|
||||
@ -89,7 +95,7 @@ TEXT ·RawSyscall(SB),NOSPLIT,$0-56
|
||||
MOVD $0, R4
|
||||
MOVD $0, R5
|
||||
MOVD trap+0(FP), R8 // syscall number
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
BCC ok
|
||||
MOVD $-1, R4
|
||||
MOVD R4, r1+32(FP) // r1
|
||||
@ -110,7 +116,7 @@ TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
|
||||
MOVD a5+40(FP), R4
|
||||
MOVD a6+48(FP), R5
|
||||
MOVD trap+0(FP), R8 // syscall number
|
||||
SVC
|
||||
INVOKE_SYSCALL
|
||||
BCC ok
|
||||
MOVD $-1, R4
|
||||
MOVD R4, r1+56(FP) // r1
|
||||
|
||||
Loading…
Reference in New Issue
Block a user