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| author | Tobias Klauser <tklauser@distanz.ch> | 2022-03-03 10:19:07 +0100 |
|---|---|---|
| committer | Tobias Klauser <tobias.klauser@gmail.com> | 2022-03-03 20:47:17 +0000 |
| commit | 9d34fc5108d91bfcce3c465069dbb2c563af4229 (patch) | |
| tree | 266610efcdc56e77e06bc02888a2452487e4f45f /src/runtime/sys_linux_arm.s | |
| parent | 58804ea67a28c1d8e37ed548b685bc0c09638886 (diff) | |
| download | go-9d34fc5108d91bfcce3c465069dbb2c563af4229.tar.xz | |
runtime: remove fallback to pipe on platforms with pipe2
On Linux, the minimum required kernel version for Go 1.18 was be changed
to 2.6.32, see #45964. The pipe2 syscall was added in 2.6.27.
All other platforms already provide the pipe2 syscall in the minimum
supported version:
- DragonFly BSD added it in version 4.2, see
https://www.dragonflybsd.org/release42/
- FreeBSD added it in version 10.0, see
https://www.freebsd.org/cgi/man.cgi?pipe(2)#end
- NetBSD added it in version 6.0, see
https://man.netbsd.org/pipe2.2#HISTORY
- OpenBSD added it in version 5.7, see
https://man.openbsd.org/pipe.2#HISTORY
- Illumos supports it since 2013, see
https://www.illumos.org/issues/3714
- Solaris supports it since 11.4
This also allows to remove setNonblock which was only used in the pipe
fallback path on these platforms.
Change-Id: I1f40d32fd3065d74e22af77b9ff2292b9cf66706
Reviewed-on: https://go-review.googlesource.com/c/go/+/389354
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Diffstat (limited to 'src/runtime/sys_linux_arm.s')
| -rw-r--r-- | src/runtime/sys_linux_arm.s | 23 |
1 files changed, 0 insertions, 23 deletions
diff --git a/src/runtime/sys_linux_arm.s b/src/runtime/sys_linux_arm.s index ca443b699f..201940b4e6 100644 --- a/src/runtime/sys_linux_arm.s +++ b/src/runtime/sys_linux_arm.s @@ -23,7 +23,6 @@ #define SYS_close (SYS_BASE + 6) #define SYS_getpid (SYS_BASE + 20) #define SYS_kill (SYS_BASE + 37) -#define SYS_pipe (SYS_BASE + 42) #define SYS_clone (SYS_BASE + 120) #define SYS_rt_sigreturn (SYS_BASE + 173) #define SYS_rt_sigaction (SYS_BASE + 174) @@ -98,14 +97,6 @@ TEXT runtime·read(SB),NOSPLIT,$0 MOVW R0, ret+12(FP) RET -// func pipe() (r, w int32, errno int32) -TEXT runtime·pipe(SB),NOSPLIT,$0-12 - MOVW $r+0(FP), R0 - MOVW $SYS_pipe, R7 - SWI $0 - MOVW R0, errno+8(FP) - RET - // func pipe2(flags int32) (r, w int32, errno int32) TEXT runtime·pipe2(SB),NOSPLIT,$0-16 MOVW $r+4(FP), R0 @@ -717,20 +708,6 @@ TEXT runtime·closeonexec(SB),NOSPLIT,$0 SWI $0 RET -// func runtime·setNonblock(fd int32) -TEXT runtime·setNonblock(SB),NOSPLIT,$0-4 - MOVW fd+0(FP), R0 // fd - MOVW $3, R1 // F_GETFL - MOVW $0, R2 - MOVW $SYS_fcntl, R7 - SWI $0 - ORR $0x800, R0, R2 // O_NONBLOCK - MOVW fd+0(FP), R0 // fd - MOVW $4, R1 // F_SETFL - MOVW $SYS_fcntl, R7 - SWI $0 - RET - // b __kuser_get_tls @ 0xffff0fe0 TEXT runtime·read_tls_fallback(SB),NOSPLIT|NOFRAME,$0 MOVW $0xffff0fe0, R0 |