mirror of
https://github.com/golang/go
synced 2024-11-08 01:36:12 -07:00
cc8809238b
The caller of epollctl expects it to return a negative errno value, but it returns a positive errno value on mips, mips64 and ppc64. The change fixes this. Updates #23446 Change-Id: Ie6372eca6c23de21964caaaa433c9a45ef93531e Reviewed-on: https://go-review.googlesource.com/89235 Reviewed-by: Carlos Eduardo Seo <cseo@linux.vnet.ibm.com> Reviewed-by: Ian Lance Taylor <iant@golang.org> Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
447 lines
8.8 KiB
ArmAsm
447 lines
8.8 KiB
ArmAsm
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build linux
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// +build mips64 mips64le
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//
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// System calls and other sys.stuff for mips64, Linux
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//
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#include "go_asm.h"
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#include "go_tls.h"
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#include "textflag.h"
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#define AT_FDCWD -100
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#define SYS_exit 5058
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#define SYS_read 5000
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#define SYS_write 5001
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#define SYS_close 5003
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#define SYS_getpid 5038
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#define SYS_kill 5060
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#define SYS_fcntl 5080
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#define SYS_mmap 5009
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#define SYS_munmap 5011
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#define SYS_setitimer 5036
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#define SYS_clone 5055
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#define SYS_nanosleep 5034
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#define SYS_sched_yield 5023
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#define SYS_rt_sigreturn 5211
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#define SYS_rt_sigaction 5013
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#define SYS_rt_sigprocmask 5014
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#define SYS_sigaltstack 5129
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#define SYS_madvise 5027
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#define SYS_mincore 5026
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#define SYS_gettid 5178
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#define SYS_tkill 5192
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#define SYS_futex 5194
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#define SYS_sched_getaffinity 5196
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#define SYS_exit_group 5205
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#define SYS_epoll_create 5207
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#define SYS_epoll_ctl 5208
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#define SYS_openat 5247
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#define SYS_epoll_pwait 5272
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#define SYS_clock_gettime 5222
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#define SYS_epoll_create1 5285
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#define SYS_brk 5012
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TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0-4
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MOVW code+0(FP), R4
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MOVV $SYS_exit_group, R2
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SYSCALL
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RET
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// func exitThread(wait *uint32)
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TEXT runtime·exitThread(SB),NOSPLIT|NOFRAME,$0-8
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MOVV wait+0(FP), R1
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// We're done using the stack.
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MOVW $0, R2
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SYNC
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MOVW R2, (R1)
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SYNC
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MOVW $0, R4 // exit code
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MOVV $SYS_exit, R2
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SYSCALL
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JMP 0(PC)
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TEXT runtime·open(SB),NOSPLIT|NOFRAME,$0-20
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// This uses openat instead of open, because Android O blocks open.
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MOVW $AT_FDCWD, R4 // AT_FDCWD, so this acts like open
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MOVV name+0(FP), R5
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MOVW mode+8(FP), R6
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MOVW perm+12(FP), R7
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MOVV $SYS_openat, R2
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SYSCALL
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BEQ R7, 2(PC)
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MOVW $-1, R2
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MOVW R2, ret+16(FP)
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RET
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TEXT runtime·closefd(SB),NOSPLIT|NOFRAME,$0-12
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MOVW fd+0(FP), R4
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MOVV $SYS_close, R2
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SYSCALL
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BEQ R7, 2(PC)
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MOVW $-1, R2
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MOVW R2, ret+8(FP)
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RET
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TEXT runtime·write(SB),NOSPLIT|NOFRAME,$0-28
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MOVV fd+0(FP), R4
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MOVV p+8(FP), R5
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MOVW n+16(FP), R6
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MOVV $SYS_write, R2
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SYSCALL
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BEQ R7, 2(PC)
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MOVW $-1, R2
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MOVW R2, ret+24(FP)
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RET
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TEXT runtime·read(SB),NOSPLIT|NOFRAME,$0-28
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MOVW fd+0(FP), R4
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MOVV p+8(FP), R5
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MOVW n+16(FP), R6
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MOVV $SYS_read, R2
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SYSCALL
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BEQ R7, 2(PC)
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MOVW $-1, R2
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MOVW R2, ret+24(FP)
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RET
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TEXT runtime·usleep(SB),NOSPLIT,$16-4
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MOVWU usec+0(FP), R3
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MOVV R3, R5
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MOVW $1000000, R4
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DIVVU R4, R3
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MOVV LO, R3
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MOVV R3, 8(R29)
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MOVW $1000, R4
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MULVU R3, R4
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MOVV LO, R4
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SUBVU R4, R5
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MOVV R5, 16(R29)
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// nanosleep(&ts, 0)
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ADDV $8, R29, R4
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MOVW $0, R5
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MOVV $SYS_nanosleep, R2
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SYSCALL
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RET
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TEXT runtime·gettid(SB),NOSPLIT,$0-4
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MOVV $SYS_gettid, R2
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SYSCALL
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MOVW R2, ret+0(FP)
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RET
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TEXT runtime·raise(SB),NOSPLIT|NOFRAME,$0
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MOVV $SYS_gettid, R2
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SYSCALL
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MOVW R2, R4 // arg 1 tid
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MOVW sig+0(FP), R5 // arg 2
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MOVV $SYS_tkill, R2
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SYSCALL
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RET
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TEXT runtime·raiseproc(SB),NOSPLIT|NOFRAME,$0
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MOVV $SYS_getpid, R2
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SYSCALL
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MOVW R2, R4 // arg 1 pid
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MOVW sig+0(FP), R5 // arg 2
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MOVV $SYS_kill, R2
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SYSCALL
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RET
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TEXT runtime·setitimer(SB),NOSPLIT|NOFRAME,$0-24
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MOVW mode+0(FP), R4
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MOVV new+8(FP), R5
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MOVV old+16(FP), R6
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MOVV $SYS_setitimer, R2
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SYSCALL
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RET
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TEXT runtime·mincore(SB),NOSPLIT|NOFRAME,$0-28
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MOVV addr+0(FP), R4
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MOVV n+8(FP), R5
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MOVV dst+16(FP), R6
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MOVV $SYS_mincore, R2
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SYSCALL
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SUBVU R2, R0, R2 // caller expects negative errno
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MOVW R2, ret+24(FP)
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RET
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// func walltime() (sec int64, nsec int32)
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TEXT runtime·walltime(SB),NOSPLIT,$16
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MOVW $0, R4 // CLOCK_REALTIME
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MOVV $0(R29), R5
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MOVV $SYS_clock_gettime, R2
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SYSCALL
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MOVV 0(R29), R3 // sec
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MOVV 8(R29), R5 // nsec
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MOVV R3, sec+0(FP)
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MOVW R5, nsec+8(FP)
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RET
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TEXT runtime·nanotime(SB),NOSPLIT,$16
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MOVW $1, R4 // CLOCK_MONOTONIC
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MOVV $0(R29), R5
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MOVV $SYS_clock_gettime, R2
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SYSCALL
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MOVV 0(R29), R3 // sec
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MOVV 8(R29), R5 // nsec
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// sec is in R3, nsec in R5
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// return nsec in R3
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MOVV $1000000000, R4
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MULVU R4, R3
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MOVV LO, R3
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ADDVU R5, R3
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MOVV R3, ret+0(FP)
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RET
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TEXT runtime·rtsigprocmask(SB),NOSPLIT|NOFRAME,$0-28
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MOVW how+0(FP), R4
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MOVV new+8(FP), R5
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MOVV old+16(FP), R6
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MOVW size+24(FP), R7
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MOVV $SYS_rt_sigprocmask, R2
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SYSCALL
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BEQ R7, 2(PC)
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MOVV R0, 0xf1(R0) // crash
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RET
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TEXT runtime·rt_sigaction(SB),NOSPLIT|NOFRAME,$0-36
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MOVV sig+0(FP), R4
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MOVV new+8(FP), R5
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MOVV old+16(FP), R6
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MOVV size+24(FP), R7
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MOVV $SYS_rt_sigaction, R2
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SYSCALL
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MOVW R2, ret+32(FP)
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RET
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TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
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MOVW sig+8(FP), R4
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MOVV info+16(FP), R5
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MOVV ctx+24(FP), R6
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MOVV fn+0(FP), R25
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JAL (R25)
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RET
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TEXT runtime·sigtramp(SB),NOSPLIT,$64
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// initialize REGSB = PC&0xffffffff00000000
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BGEZAL R0, 1(PC)
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SRLV $32, R31, RSB
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SLLV $32, RSB
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// this might be called in external code context,
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// where g is not set.
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MOVB runtime·iscgo(SB), R1
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BEQ R1, 2(PC)
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JAL runtime·load_g(SB)
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MOVW R4, 8(R29)
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MOVV R5, 16(R29)
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MOVV R6, 24(R29)
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MOVV $runtime·sigtrampgo(SB), R1
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JAL (R1)
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RET
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TEXT runtime·cgoSigtramp(SB),NOSPLIT,$0
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JMP runtime·sigtramp(SB)
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TEXT runtime·mmap(SB),NOSPLIT|NOFRAME,$0
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MOVV addr+0(FP), R4
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MOVV n+8(FP), R5
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MOVW prot+16(FP), R6
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MOVW flags+20(FP), R7
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MOVW fd+24(FP), R8
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MOVW off+28(FP), R9
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MOVV $SYS_mmap, R2
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SYSCALL
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BEQ R7, ok
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MOVV $0, p+32(FP)
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MOVV R2, err+40(FP)
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RET
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ok:
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MOVV R2, p+32(FP)
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MOVV $0, err+40(FP)
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RET
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TEXT runtime·munmap(SB),NOSPLIT|NOFRAME,$0
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MOVV addr+0(FP), R4
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MOVV n+8(FP), R5
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MOVV $SYS_munmap, R2
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SYSCALL
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BEQ R7, 2(PC)
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MOVV R0, 0xf3(R0) // crash
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RET
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TEXT runtime·madvise(SB),NOSPLIT|NOFRAME,$0
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MOVV addr+0(FP), R4
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MOVV n+8(FP), R5
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MOVW flags+16(FP), R6
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MOVV $SYS_madvise, R2
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SYSCALL
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// ignore failure - maybe pages are locked
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RET
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// int64 futex(int32 *uaddr, int32 op, int32 val,
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// struct timespec *timeout, int32 *uaddr2, int32 val2);
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TEXT runtime·futex(SB),NOSPLIT|NOFRAME,$0
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MOVV addr+0(FP), R4
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MOVW op+8(FP), R5
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MOVW val+12(FP), R6
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MOVV ts+16(FP), R7
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MOVV addr2+24(FP), R8
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MOVW val3+32(FP), R9
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MOVV $SYS_futex, R2
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SYSCALL
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MOVW R2, ret+40(FP)
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RET
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// int64 clone(int32 flags, void *stk, M *mp, G *gp, void (*fn)(void));
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TEXT runtime·clone(SB),NOSPLIT|NOFRAME,$0
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MOVW flags+0(FP), R4
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MOVV stk+8(FP), R5
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// Copy mp, gp, fn off parent stack for use by child.
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// Careful: Linux system call clobbers ???.
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MOVV mp+16(FP), R16
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MOVV gp+24(FP), R17
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MOVV fn+32(FP), R18
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MOVV R16, -8(R5)
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MOVV R17, -16(R5)
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MOVV R18, -24(R5)
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MOVV $1234, R16
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MOVV R16, -32(R5)
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MOVV $SYS_clone, R2
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SYSCALL
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// In parent, return.
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BEQ R2, 3(PC)
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MOVW R2, ret+40(FP)
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RET
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// In child, on new stack.
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MOVV -32(R29), R16
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MOVV $1234, R1
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BEQ R16, R1, 2(PC)
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MOVV R0, 0(R0)
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// Initialize m->procid to Linux tid
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MOVV $SYS_gettid, R2
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SYSCALL
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MOVV -24(R29), R18 // fn
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MOVV -16(R29), R17 // g
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MOVV -8(R29), R16 // m
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BEQ R16, nog
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BEQ R17, nog
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MOVV R2, m_procid(R16)
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// TODO: setup TLS.
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// In child, set up new stack
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MOVV R16, g_m(R17)
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MOVV R17, g
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//CALL runtime·stackcheck(SB)
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nog:
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// Call fn
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JAL (R18)
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// It shouldn't return. If it does, exit that thread.
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MOVW $111, R4
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MOVV $SYS_exit, R2
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SYSCALL
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JMP -3(PC) // keep exiting
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TEXT runtime·sigaltstack(SB),NOSPLIT|NOFRAME,$0
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MOVV new+0(FP), R4
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MOVV old+8(FP), R5
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MOVV $SYS_sigaltstack, R2
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SYSCALL
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BEQ R7, 2(PC)
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MOVV R0, 0xf1(R0) // crash
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RET
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TEXT runtime·osyield(SB),NOSPLIT|NOFRAME,$0
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MOVV $SYS_sched_yield, R2
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SYSCALL
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RET
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TEXT runtime·sched_getaffinity(SB),NOSPLIT|NOFRAME,$0
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MOVV pid+0(FP), R4
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MOVV len+8(FP), R5
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MOVV buf+16(FP), R6
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MOVV $SYS_sched_getaffinity, R2
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SYSCALL
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MOVW R2, ret+24(FP)
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RET
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// int32 runtime·epollcreate(int32 size);
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TEXT runtime·epollcreate(SB),NOSPLIT|NOFRAME,$0
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MOVW size+0(FP), R4
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MOVV $SYS_epoll_create, R2
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SYSCALL
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MOVW R2, ret+8(FP)
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RET
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// int32 runtime·epollcreate1(int32 flags);
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TEXT runtime·epollcreate1(SB),NOSPLIT|NOFRAME,$0
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MOVW flags+0(FP), R4
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MOVV $SYS_epoll_create1, R2
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SYSCALL
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MOVW R2, ret+8(FP)
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RET
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// func epollctl(epfd, op, fd int32, ev *epollEvent) int
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TEXT runtime·epollctl(SB),NOSPLIT|NOFRAME,$0
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MOVW epfd+0(FP), R4
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MOVW op+4(FP), R5
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MOVW fd+8(FP), R6
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MOVV ev+16(FP), R7
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MOVV $SYS_epoll_ctl, R2
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SYSCALL
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SUBVU R2, R0, R2 // caller expects negative errno
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MOVW R2, ret+24(FP)
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RET
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// int32 runtime·epollwait(int32 epfd, EpollEvent *ev, int32 nev, int32 timeout);
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TEXT runtime·epollwait(SB),NOSPLIT|NOFRAME,$0
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// This uses pwait instead of wait, because Android O blocks wait.
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MOVW epfd+0(FP), R4
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MOVV ev+8(FP), R5
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MOVW nev+16(FP), R6
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MOVW timeout+20(FP), R7
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MOVV $0, R8
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MOVV $SYS_epoll_pwait, R2
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SYSCALL
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MOVW R2, ret+24(FP)
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RET
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// void runtime·closeonexec(int32 fd);
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TEXT runtime·closeonexec(SB),NOSPLIT|NOFRAME,$0
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MOVW fd+0(FP), R4 // fd
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MOVV $2, R5 // F_SETFD
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MOVV $1, R6 // FD_CLOEXEC
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MOVV $SYS_fcntl, R2
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SYSCALL
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RET
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// func sbrk0() uintptr
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TEXT runtime·sbrk0(SB),NOSPLIT|NOFRAME,$0-8
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// Implemented as brk(NULL).
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MOVV $0, R4
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MOVV $SYS_brk, R2
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SYSCALL
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MOVV R2, ret+0(FP)
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RET
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