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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build linux
// +build mips64 mips64le
//
// System calls and other sys.stuff for mips64, Linux
//
#include "go_asm.h"
#include "go_tls.h"
#include "textflag.h"
#define SYS_exit 5058
#define SYS_read 5000
#define SYS_write 5001
#define SYS_open 5002
#define SYS_close 5003
#define SYS_getpid 5038
#define SYS_kill 5060
#define SYS_fcntl 5080
#define SYS_gettimeofday 5094
#define SYS_mmap 5009
#define SYS_munmap 5011
#define SYS_setitimer 5036
#define SYS_clone 5055
#define SYS_newselect 5022
#define SYS_sched_yield 5023
#define SYS_rt_sigreturn 5211
#define SYS_rt_sigaction 5013
#define SYS_rt_sigprocmask 5014
#define SYS_sigaltstack 5129
#define SYS_getrlimit 5095
#define SYS_madvise 5027
#define SYS_mincore 5026
#define SYS_gettid 5178
#define SYS_tkill 5192
#define SYS_futex 5194
#define SYS_sched_getaffinity 5196
#define SYS_exit_group 5205
#define SYS_epoll_create 5207
#define SYS_epoll_ctl 5208
#define SYS_epoll_wait 5209
#define SYS_clock_gettime 5222
#define SYS_epoll_create1 5285
TEXT runtime·exit(SB),NOSPLIT,$-8-4
MOVW code+0(FP), R4
MOVV $SYS_exit_group, R2
SYSCALL
RET
TEXT runtime·exit1(SB),NOSPLIT,$-8-4
MOVW code+0(FP), R4
MOVV $SYS_exit, R2
SYSCALL
RET
TEXT runtime·open(SB),NOSPLIT,$-8-20
MOVV name+0(FP), R4
MOVW mode+8(FP), R5
MOVW perm+12(FP), R6
MOVV $SYS_open, R2
SYSCALL
BEQ R7, 2(PC)
MOVW $-1, R2
MOVW R2, ret+16(FP)
RET
TEXT runtime·closefd(SB),NOSPLIT,$-8-12
MOVW fd+0(FP), R4
MOVV $SYS_close, R2
SYSCALL
BEQ R7, 2(PC)
MOVW $-1, R2
MOVW R2, ret+8(FP)
RET
TEXT runtime·write(SB),NOSPLIT,$-8-28
MOVV fd+0(FP), R4
MOVV p+8(FP), R5
MOVW n+16(FP), R6
MOVV $SYS_write, R2
SYSCALL
BEQ R7, 2(PC)
MOVW $-1, R2
MOVW R2, ret+24(FP)
RET
TEXT runtime·read(SB),NOSPLIT,$-8-28
MOVW fd+0(FP), R4
MOVV p+8(FP), R5
MOVW n+16(FP), R6
MOVV $SYS_read, R2
SYSCALL
BEQ R7, 2(PC)
MOVW $-1, R2
MOVW R2, ret+24(FP)
RET
TEXT runtime·getrlimit(SB),NOSPLIT,$-8-20
MOVW kind+0(FP), R4 // _RLIMIT_AS = 6 on linux/mips
MOVV limit+8(FP), R5
MOVV $SYS_getrlimit, R2
SYSCALL
MOVW R2, ret+16(FP)
RET
TEXT runtime·usleep(SB),NOSPLIT,$16-4
MOVWU usec+0(FP), R3
MOVV R3, R5
MOVW $1000000, R4
DIVVU R4, R3
MOVV LO, R3
MOVV R3, 8(R29)
MULVU R3, R4
MOVV LO, R4
SUBVU R4, R5
MOVV R5, 16(R29)
// select(0, 0, 0, 0, &tv)
MOVW $0, R4
MOVW $0, R5
MOVW $0, R6
MOVW $0, R7
ADDV $8, R29, R8
MOVV $SYS_newselect, R2
SYSCALL
RET
TEXT runtime·gettid(SB),NOSPLIT,$0-4
MOVV $SYS_gettid, R2
SYSCALL
MOVW R2, ret+0(FP)
RET
TEXT runtime·raise(SB),NOSPLIT,$-8
MOVV $SYS_gettid, R2
SYSCALL
MOVW R2, R4 // arg 1 tid
MOVW sig+0(FP), R5 // arg 2
MOVV $SYS_tkill, R2
SYSCALL
RET
TEXT runtime·raiseproc(SB),NOSPLIT,$-8
MOVV $SYS_getpid, R2
SYSCALL
MOVW R2, R4 // arg 1 pid
MOVW sig+0(FP), R5 // arg 2
MOVV $SYS_kill, R2
SYSCALL
RET
TEXT runtime·setitimer(SB),NOSPLIT,$-8-24
MOVW mode+0(FP), R4
MOVV new+8(FP), R5
MOVV old+16(FP), R6
MOVV $SYS_setitimer, R2
SYSCALL
RET
TEXT runtime·mincore(SB),NOSPLIT,$-8-28
MOVV addr+0(FP), R4
MOVV n+8(FP), R5
MOVV dst+16(FP), R6
MOVV $SYS_mincore, R2
SYSCALL
SUBVU R2, R0, R2 // caller expects negative errno
MOVW R2, ret+24(FP)
RET
// func now() (sec int64, nsec int32)
TEXT time·now(SB),NOSPLIT,$16
MOVW $0, R4 // CLOCK_REALTIME
MOVV $0(R29), R5
MOVV $SYS_clock_gettime, R2
SYSCALL
MOVV 0(R29), R3 // sec
MOVV 8(R29), R5 // nsec
MOVV R3, sec+0(FP)
MOVW R5, nsec+8(FP)
RET
TEXT runtime·nanotime(SB),NOSPLIT,$16
MOVW $1, R4 // CLOCK_MONOTONIC
MOVV $0(R29), R5
MOVV $SYS_clock_gettime, R2
SYSCALL
MOVV 0(R29), R3 // sec
MOVV 8(R29), R5 // nsec
// sec is in R3, nsec in R5
// return nsec in R3
MOVV $1000000000, R4
MULVU R4, R3
MOVV LO, R3
ADDVU R5, R3
MOVV R3, ret+0(FP)
RET
TEXT runtime·rtsigprocmask(SB),NOSPLIT,$-8-28
MOVW how+0(FP), R4
MOVV new+8(FP), R5
MOVV old+16(FP), R6
MOVW size+24(FP), R7
MOVV $SYS_rt_sigprocmask, R2
SYSCALL
BEQ R7, 2(PC)
MOVV R0, 0xf1(R0) // crash
RET
TEXT runtime·rt_sigaction(SB),NOSPLIT,$-8-36
MOVV sig+0(FP), R4
MOVV new+8(FP), R5
MOVV old+16(FP), R6
MOVV size+24(FP), R7
MOVV $SYS_rt_sigaction, R2
SYSCALL
MOVW R2, ret+32(FP)
RET
TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
MOVW sig+8(FP), R4
MOVV info+16(FP), R5
MOVV ctx+24(FP), R6
MOVV fn+0(FP), R25
JAL (R25)
RET
TEXT runtime·sigtramp(SB),NOSPLIT,$64
// initialize REGSB = PC&0xffffffff00000000
BGEZAL R0, 1(PC)
SRLV $32, R31, RSB
SLLV $32, RSB
// this might be called in external code context,
// where g is not set.
MOVB runtime·iscgo(SB), R1
BEQ R1, 2(PC)
JAL runtime·load_g(SB)
MOVW R4, 8(R29)
MOVV R5, 16(R29)
MOVV R6, 24(R29)
MOVV $runtime·sigtrampgo(SB), R1
JAL (R1)
RET
TEXT runtime·cgoSigtramp(SB),NOSPLIT,$0
JMP runtime·sigtramp(SB)
TEXT runtime·mmap(SB),NOSPLIT,$-8
MOVV addr+0(FP), R4
MOVV n+8(FP), R5
MOVW prot+16(FP), R6
MOVW flags+20(FP), R7
MOVW fd+24(FP), R8
MOVW off+28(FP), R9
MOVV $SYS_mmap, R2
SYSCALL
MOVV R2, ret+32(FP)
RET
TEXT runtime·munmap(SB),NOSPLIT,$-8
MOVV addr+0(FP), R4
MOVV n+8(FP), R5
MOVV $SYS_munmap, R2
SYSCALL
BEQ R7, 2(PC)
MOVV R0, 0xf3(R0) // crash
RET
TEXT runtime·madvise(SB),NOSPLIT,$-8
MOVV addr+0(FP), R4
MOVV n+8(FP), R5
MOVW flags+16(FP), R6
MOVV $SYS_madvise, R2
SYSCALL
// ignore failure - maybe pages are locked
RET
// int64 futex(int32 *uaddr, int32 op, int32 val,
// struct timespec *timeout, int32 *uaddr2, int32 val2);
TEXT runtime·futex(SB),NOSPLIT,$-8
MOVV addr+0(FP), R4
MOVW op+8(FP), R5
MOVW val+12(FP), R6
MOVV ts+16(FP), R7
MOVV addr2+24(FP), R8
MOVW val3+32(FP), R9
MOVV $SYS_futex, R2
SYSCALL
MOVW R2, ret+40(FP)
RET
// int64 clone(int32 flags, void *stk, M *mp, G *gp, void (*fn)(void));
TEXT runtime·clone(SB),NOSPLIT,$-8
MOVW flags+0(FP), R4
MOVV stk+8(FP), R5
// Copy mp, gp, fn off parent stack for use by child.
// Careful: Linux system call clobbers ???.
MOVV mp+16(FP), R16
MOVV gp+24(FP), R17
MOVV fn+32(FP), R18
MOVV R16, -8(R5)
MOVV R17, -16(R5)
MOVV R18, -24(R5)
MOVV $1234, R16
MOVV R16, -32(R5)
MOVV $SYS_clone, R2
SYSCALL
// In parent, return.
BEQ R2, 3(PC)
MOVW R2, ret+40(FP)
RET
// In child, on new stack.
MOVV -32(R29), R16
MOVV $1234, R1
BEQ R16, R1, 2(PC)
MOVV R0, 0(R0)
// Initialize m->procid to Linux tid
MOVV $SYS_gettid, R2
SYSCALL
MOVV -24(R29), R18 // fn
MOVV -16(R29), R17 // g
MOVV -8(R29), R16 // m
BEQ R16, nog
BEQ R17, nog
MOVV R2, m_procid(R16)
// TODO: setup TLS.
// In child, set up new stack
MOVV R16, g_m(R17)
MOVV R17, g
//CALL runtime·stackcheck(SB)
nog:
// Call fn
JAL (R18)
// It shouldn't return. If it does, exit that thread.
MOVW $111, R4
MOVV $SYS_exit, R2
SYSCALL
JMP -3(PC) // keep exiting
TEXT runtime·sigaltstack(SB),NOSPLIT,$-8
MOVV new+0(FP), R4
MOVV old+8(FP), R5
MOVV $SYS_sigaltstack, R2
SYSCALL
BEQ R7, 2(PC)
MOVV R0, 0xf1(R0) // crash
RET
TEXT runtime·osyield(SB),NOSPLIT,$-8
MOVV $SYS_sched_yield, R2
SYSCALL
RET
TEXT runtime·sched_getaffinity(SB),NOSPLIT,$-8
MOVV pid+0(FP), R4
MOVV len+8(FP), R5
MOVV buf+16(FP), R6
MOVV $SYS_sched_getaffinity, R2
SYSCALL
MOVW R2, ret+24(FP)
RET
// int32 runtime·epollcreate(int32 size);
TEXT runtime·epollcreate(SB),NOSPLIT,$-8
MOVW size+0(FP), R4
MOVV $SYS_epoll_create, R2
SYSCALL
MOVW R2, ret+8(FP)
RET
// int32 runtime·epollcreate1(int32 flags);
TEXT runtime·epollcreate1(SB),NOSPLIT,$-8
MOVW flags+0(FP), R4
MOVV $SYS_epoll_create1, R2
SYSCALL
MOVW R2, ret+8(FP)
RET
// func epollctl(epfd, op, fd int32, ev *epollEvent) int
TEXT runtime·epollctl(SB),NOSPLIT,$-8
MOVW epfd+0(FP), R4
MOVW op+4(FP), R5
MOVW fd+8(FP), R6
MOVV ev+16(FP), R7
MOVV $SYS_epoll_ctl, R2
SYSCALL
MOVW R2, ret+24(FP)
RET
// int32 runtime·epollwait(int32 epfd, EpollEvent *ev, int32 nev, int32 timeout);
TEXT runtime·epollwait(SB),NOSPLIT,$-8
MOVW epfd+0(FP), R4
MOVV ev+8(FP), R5
MOVW nev+16(FP), R6
MOVW timeout+20(FP), R7
MOVV $SYS_epoll_wait, R2
SYSCALL
MOVW R2, ret+24(FP)
RET
// void runtime·closeonexec(int32 fd);
TEXT runtime·closeonexec(SB),NOSPLIT,$-8
MOVW fd+0(FP), R4 // fd
MOVV $2, R5 // F_SETFD
MOVV $1, R6 // FD_CLOEXEC
MOVV $SYS_fcntl, R2
SYSCALL
RET