1 files changed, 566 insertions, 0 deletions
diff --git a/src/runtime/sys_linux_mipsx.s b/src/runtime/sys_linux_mipsx.s
new file mode 100644
index 0000000..8f95819
--- /dev/null
+++ b/src/runtime/sys_linux_mipsx.s
@@ -0,0 +1,566 @@
+// Copyright 2016 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.
+
+//go:build linux && (mips || mipsle)
+
+//
+// System calls and other sys.stuff for mips, Linux
+//
+
+#include "go_asm.h"
+#include "go_tls.h"
+#include "textflag.h"
+
+#define SYS_exit		4001
+#define SYS_read		4003
+#define SYS_write		4004
+#define SYS_open		4005
+#define SYS_close		4006
+#define SYS_getpid		4020
+#define SYS_kill		4037
+#define SYS_brk			4045
+#define SYS_fcntl		4055
+#define SYS_mmap		4090
+#define SYS_munmap		4091
+#define SYS_setitimer		4104
+#define SYS_clone		4120
+#define SYS_sched_yield		4162
+#define SYS_nanosleep		4166
+#define SYS_rt_sigreturn	4193
+#define SYS_rt_sigaction	4194
+#define SYS_rt_sigprocmask	4195
+#define SYS_sigaltstack		4206
+#define SYS_madvise		4218
+#define SYS_mincore		4217
+#define SYS_gettid		4222
+#define SYS_futex		4238
+#define SYS_sched_getaffinity	4240
+#define SYS_exit_group		4246
+#define SYS_epoll_create	4248
+#define SYS_epoll_ctl		4249
+#define SYS_epoll_wait		4250
+#define SYS_timer_create	4257
+#define SYS_timer_settime	4258
+#define SYS_timer_delete	4261
+#define SYS_clock_gettime	4263
+#define SYS_tgkill		4266
+#define SYS_epoll_create1	4326
+#define SYS_pipe2		4328
+
+TEXT runtime·exit(SB),NOSPLIT,$0-4
+	MOVW	code+0(FP), R4
+	MOVW	$SYS_exit_group, R2
+	SYSCALL
+	UNDEF
+	RET
+
+// func exitThread(wait *atomic.Uint32)
+TEXT runtime·exitThread(SB),NOSPLIT,$0-4
+	MOVW	wait+0(FP), R1
+	// We're done using the stack.
+	MOVW	$0, R2
+	SYNC
+	MOVW	R2, (R1)
+	SYNC
+	MOVW	$0, R4	// exit code
+	MOVW	$SYS_exit, R2
+	SYSCALL
+	UNDEF
+	JMP	0(PC)
+
+TEXT runtime·open(SB),NOSPLIT,$0-16
+	MOVW	name+0(FP), R4
+	MOVW	mode+4(FP), R5
+	MOVW	perm+8(FP), R6
+	MOVW	$SYS_open, R2
+	SYSCALL
+	BEQ	R7, 2(PC)
+	MOVW	$-1, R2
+	MOVW	R2, ret+12(FP)
+	RET
+
+TEXT runtime·closefd(SB),NOSPLIT,$0-8
+	MOVW	fd+0(FP), R4
+	MOVW	$SYS_close, R2
+	SYSCALL
+	BEQ	R7, 2(PC)
+	MOVW	$-1, R2
+	MOVW	R2, ret+4(FP)
+	RET
+
+TEXT runtime·write1(SB),NOSPLIT,$0-16
+	MOVW	fd+0(FP), R4
+	MOVW	p+4(FP), R5
+	MOVW	n+8(FP), R6
+	MOVW	$SYS_write, R2
+	SYSCALL
+	BEQ	R7, 2(PC)
+	SUBU	R2, R0, R2	// caller expects negative errno
+	MOVW	R2, ret+12(FP)
+	RET
+
+TEXT runtime·read(SB),NOSPLIT,$0-16
+	MOVW	fd+0(FP), R4
+	MOVW	p+4(FP), R5
+	MOVW	n+8(FP), R6
+	MOVW	$SYS_read, R2
+	SYSCALL
+	BEQ	R7, 2(PC)
+	SUBU	R2, R0, R2	// caller expects negative errno
+	MOVW	R2, ret+12(FP)
+	RET
+
+// func pipe2(flags int32) (r, w int32, errno int32)
+TEXT runtime·pipe2(SB),NOSPLIT,$0-16
+	MOVW	$r+4(FP), R4
+	MOVW	flags+0(FP), R5
+	MOVW	$SYS_pipe2, R2
+	SYSCALL
+	BEQ	R7, 2(PC)
+	SUBU	R2, R0, R2	// caller expects negative errno
+	MOVW	R2, errno+12(FP)
+	RET
+
+TEXT runtime·usleep(SB),NOSPLIT,$28-4
+	MOVW	usec+0(FP), R3
+	MOVW	R3, R5
+	MOVW	$1000000, R4
+	DIVU	R4, R3
+	MOVW	LO, R3
+	MOVW	R3, 24(R29)
+	MOVW	$1000, R4
+	MULU	R3, R4
+	MOVW	LO, R4
+	SUBU	R4, R5
+	MOVW	R5, 28(R29)
+
+	// nanosleep(&ts, 0)
+	ADDU	$24, R29, R4
+	MOVW	$0, R5
+	MOVW	$SYS_nanosleep, R2
+	SYSCALL
+	RET
+
+TEXT runtime·gettid(SB),NOSPLIT,$0-4
+	MOVW	$SYS_gettid, R2
+	SYSCALL
+	MOVW	R2, ret+0(FP)
+	RET
+
+TEXT runtime·raise(SB),NOSPLIT,$0-4
+	MOVW	$SYS_getpid, R2
+	SYSCALL
+	MOVW	R2, R16
+	MOVW	$SYS_gettid, R2
+	SYSCALL
+	MOVW	R2, R5	// arg 2 tid
+	MOVW	R16, R4	// arg 1 pid
+	MOVW	sig+0(FP), R6	// arg 3
+	MOVW	$SYS_tgkill, R2
+	SYSCALL
+	RET
+
+TEXT runtime·raiseproc(SB),NOSPLIT,$0
+	MOVW	$SYS_getpid, R2
+	SYSCALL
+	MOVW	R2, R4	// arg 1 pid
+	MOVW	sig+0(FP), R5	// arg 2
+	MOVW	$SYS_kill, R2
+	SYSCALL
+	RET
+
+TEXT ·getpid(SB),NOSPLIT,$0-4
+	MOVW	$SYS_getpid, R2
+	SYSCALL
+	MOVW	R2, ret+0(FP)
+	RET
+
+TEXT ·tgkill(SB),NOSPLIT,$0-12
+	MOVW	tgid+0(FP), R4
+	MOVW	tid+4(FP), R5
+	MOVW	sig+8(FP), R6
+	MOVW	$SYS_tgkill, R2
+	SYSCALL
+	RET
+
+TEXT runtime·setitimer(SB),NOSPLIT,$0-12
+	MOVW	mode+0(FP), R4
+	MOVW	new+4(FP), R5
+	MOVW	old+8(FP), R6
+	MOVW	$SYS_setitimer, R2
+	SYSCALL
+	RET
+
+TEXT runtime·timer_create(SB),NOSPLIT,$0-16
+	MOVW	clockid+0(FP), R4
+	MOVW	sevp+4(FP), R5
+	MOVW	timerid+8(FP), R6
+	MOVW	$SYS_timer_create, R2
+	SYSCALL
+	MOVW	R2, ret+12(FP)
+	RET
+
+TEXT runtime·timer_settime(SB),NOSPLIT,$0-20
+	MOVW	timerid+0(FP), R4
+	MOVW	flags+4(FP), R5
+	MOVW	new+8(FP), R6
+	MOVW	old+12(FP), R7
+	MOVW	$SYS_timer_settime, R2
+	SYSCALL
+	MOVW	R2, ret+16(FP)
+	RET
+
+TEXT runtime·timer_delete(SB),NOSPLIT,$0-8
+	MOVW	timerid+0(FP), R4
+	MOVW	$SYS_timer_delete, R2
+	SYSCALL
+	MOVW	R2, ret+4(FP)
+	RET
+
+TEXT runtime·mincore(SB),NOSPLIT,$0-16
+	MOVW	addr+0(FP), R4
+	MOVW	n+4(FP), R5
+	MOVW	dst+8(FP), R6
+	MOVW	$SYS_mincore, R2
+	SYSCALL
+	SUBU	R2, R0, R2	// caller expects negative errno
+	MOVW	R2, ret+12(FP)
+	RET
+
+// func walltime() (sec int64, nsec int32)
+TEXT runtime·walltime(SB),NOSPLIT,$8-12
+	MOVW	$0, R4	// CLOCK_REALTIME
+	MOVW	$4(R29), R5
+	MOVW	$SYS_clock_gettime, R2
+	SYSCALL
+	MOVW	4(R29), R3	// sec
+	MOVW	8(R29), R5	// nsec
+	MOVW	$sec+0(FP), R6
+#ifdef GOARCH_mips
+	MOVW	R3, 4(R6)
+	MOVW	R0, 0(R6)
+#else
+	MOVW	R3, 0(R6)
+	MOVW	R0, 4(R6)
+#endif
+	MOVW	R5, nsec+8(FP)
+	RET
+
+TEXT runtime·nanotime1(SB),NOSPLIT,$8-8
+	MOVW	$1, R4	// CLOCK_MONOTONIC
+	MOVW	$4(R29), R5
+	MOVW	$SYS_clock_gettime, R2
+	SYSCALL
+	MOVW	4(R29), R3	// sec
+	MOVW	8(R29), R5	// nsec
+	// sec is in R3, nsec in R5
+	// return nsec in R3
+	MOVW	$1000000000, R4
+	MULU	R4, R3
+	MOVW	LO, R3
+	ADDU	R5, R3
+	SGTU	R5, R3, R4
+	MOVW	$ret+0(FP), R6
+#ifdef GOARCH_mips
+	MOVW	R3, 4(R6)
+#else
+	MOVW	R3, 0(R6)
+#endif
+	MOVW	HI, R3
+	ADDU	R4, R3
+#ifdef GOARCH_mips
+	MOVW	R3, 0(R6)
+#else
+	MOVW	R3, 4(R6)
+#endif
+	RET
+
+TEXT runtime·rtsigprocmask(SB),NOSPLIT,$0-16
+	MOVW	how+0(FP), R4
+	MOVW	new+4(FP), R5
+	MOVW	old+8(FP), R6
+	MOVW	size+12(FP), R7
+	MOVW	$SYS_rt_sigprocmask, R2
+	SYSCALL
+	BEQ	R7, 2(PC)
+	UNDEF	// crash
+	RET
+
+TEXT runtime·rt_sigaction(SB),NOSPLIT,$0-20
+	MOVW	sig+0(FP), R4
+	MOVW	new+4(FP), R5
+	MOVW	old+8(FP), R6
+	MOVW	size+12(FP), R7
+	MOVW	$SYS_rt_sigaction, R2
+	SYSCALL
+	BEQ	R7, 2(PC)
+	SUBU	R2, R0, R2	// caller expects negative errno
+	MOVW	R2, ret+16(FP)
+	RET
+
+TEXT runtime·sigfwd(SB),NOSPLIT,$0-16
+	MOVW	sig+4(FP), R4
+	MOVW	info+8(FP), R5
+	MOVW	ctx+12(FP), R6
+	MOVW	fn+0(FP), R25
+	MOVW	R29, R22
+	SUBU	$16, R29
+	AND	$~7, R29	// shadow space for 4 args aligned to 8 bytes as per O32 ABI
+	JAL	(R25)
+	MOVW	R22, R29
+	RET
+
+TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$12
+	// 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, 4(R29)
+	MOVW	R5, 8(R29)
+	MOVW	R6, 12(R29)
+	MOVW	$runtime·sigtrampgo(SB), R1
+	JAL	(R1)
+	RET
+
+TEXT runtime·cgoSigtramp(SB),NOSPLIT,$0
+	JMP	runtime·sigtramp(SB)
+
+TEXT runtime·mmap(SB),NOSPLIT,$20-32
+	MOVW	addr+0(FP), R4
+	MOVW	n+4(FP), R5
+	MOVW	prot+8(FP), R6
+	MOVW	flags+12(FP), R7
+	MOVW	fd+16(FP), R8
+	MOVW	off+20(FP), R9
+	MOVW	R8, 16(R29)
+	MOVW	R9, 20(R29)
+
+	MOVW	$SYS_mmap, R2
+	SYSCALL
+	BEQ	R7, ok
+	MOVW	$0, p+24(FP)
+	MOVW	R2, err+28(FP)
+	RET
+ok:
+	MOVW	R2, p+24(FP)
+	MOVW	$0, err+28(FP)
+	RET
+
+TEXT runtime·munmap(SB),NOSPLIT,$0-8
+	MOVW	addr+0(FP), R4
+	MOVW	n+4(FP), R5
+	MOVW	$SYS_munmap, R2
+	SYSCALL
+	BEQ	R7, 2(PC)
+	UNDEF	// crash
+	RET
+
+TEXT runtime·madvise(SB),NOSPLIT,$0-16
+	MOVW	addr+0(FP), R4
+	MOVW	n+4(FP), R5
+	MOVW	flags+8(FP), R6
+	MOVW	$SYS_madvise, R2
+	SYSCALL
+	MOVW	R2, ret+12(FP)
+	RET
+
+// int32 futex(int32 *uaddr, int32 op, int32 val, struct timespec *timeout, int32 *uaddr2, int32 val2);
+TEXT runtime·futex(SB),NOSPLIT,$20-28
+	MOVW	addr+0(FP), R4
+	MOVW	op+4(FP), R5
+	MOVW	val+8(FP), R6
+	MOVW	ts+12(FP), R7
+
+	MOVW	addr2+16(FP), R8
+	MOVW	val3+20(FP), R9
+
+	MOVW	R8, 16(R29)
+	MOVW	R9, 20(R29)
+
+	MOVW	$SYS_futex, R2
+	SYSCALL
+	BEQ	R7, 2(PC)
+	SUBU	R2, R0, R2	// caller expects negative errno
+	MOVW	R2, ret+24(FP)
+	RET
+
+
+// int32 clone(int32 flags, void *stk, M *mp, G *gp, void (*fn)(void));
+TEXT runtime·clone(SB),NOSPLIT|NOFRAME,$0-24
+	MOVW	flags+0(FP), R4
+	MOVW	stk+4(FP), R5
+	MOVW	R0, R6	// ptid
+	MOVW	R0, R7	// tls
+
+	// O32 syscall handler unconditionally copies arguments 5-8 from stack,
+	// even for syscalls with less than 8 arguments. Reserve 32 bytes of new
+	// stack so that any syscall invoked immediately in the new thread won't fail.
+	ADD	$-32, R5
+
+	// Copy mp, gp, fn off parent stack for use by child.
+	MOVW	mp+8(FP), R16
+	MOVW	gp+12(FP), R17
+	MOVW	fn+16(FP), R18
+
+	MOVW	$1234, R1
+
+	MOVW	R16, 0(R5)
+	MOVW	R17, 4(R5)
+	MOVW	R18, 8(R5)
+
+	MOVW	R1, 12(R5)
+
+	MOVW	$SYS_clone, R2
+	SYSCALL
+	BEQ	R7, 2(PC)
+	SUBU	R2, R0, R2	// caller expects negative errno
+
+	// In parent, return.
+	BEQ	R2, 3(PC)
+	MOVW	R2, ret+20(FP)
+	RET
+
+	// In child, on new stack.
+	// Check that SP is as we expect
+	NOP	R29	// tell vet R29/SP changed - stop checking offsets
+	MOVW	12(R29), R16
+	MOVW	$1234, R1
+	BEQ	R16, R1, 2(PC)
+	MOVW	(R0), R0
+
+	// Initialize m->procid to Linux tid
+	MOVW	$SYS_gettid, R2
+	SYSCALL
+
+	MOVW	0(R29), R16	// m
+	MOVW	4(R29), R17	// g
+	MOVW	8(R29), R18	// fn
+
+	BEQ	R16, nog
+	BEQ	R17, nog
+
+	MOVW	R2, m_procid(R16)
+
+	// In child, set up new stack
+	MOVW	R16, g_m(R17)
+	MOVW	R17, g
+
+// TODO(mips32): doesn't have runtime·stackcheck(SB)
+
+nog:
+	// Call fn
+	ADDU	$32, R29
+	JAL	(R18)
+
+	// It shouldn't return.	 If it does, exit that thread.
+	ADDU	$-32, R29
+	MOVW	$0xf4, R4
+	MOVW	$SYS_exit, R2
+	SYSCALL
+	UNDEF
+
+TEXT runtime·sigaltstack(SB),NOSPLIT,$0
+	MOVW	new+0(FP), R4
+	MOVW	old+4(FP), R5
+	MOVW	$SYS_sigaltstack, R2
+	SYSCALL
+	BEQ	R7, 2(PC)
+	UNDEF	// crash
+	RET
+
+TEXT runtime·osyield(SB),NOSPLIT,$0
+	MOVW	$SYS_sched_yield, R2
+	SYSCALL
+	RET
+
+TEXT runtime·sched_getaffinity(SB),NOSPLIT,$0-16
+	MOVW	pid+0(FP), R4
+	MOVW	len+4(FP), R5
+	MOVW	buf+8(FP), R6
+	MOVW	$SYS_sched_getaffinity, R2
+	SYSCALL
+	BEQ	R7, 2(PC)
+	SUBU	R2, R0, R2	// caller expects negative errno
+	MOVW	R2, ret+12(FP)
+	RET
+
+// int32 runtime·epollcreate(int32 size);
+TEXT runtime·epollcreate(SB),NOSPLIT,$0-8
+	MOVW	size+0(FP), R4
+	MOVW	$SYS_epoll_create, R2
+	SYSCALL
+	BEQ	R7, 2(PC)
+	SUBU	R2, R0, R2	// caller expects negative errno
+	MOVW	R2, ret+4(FP)
+	RET
+
+// int32 runtime·epollcreate1(int32 flags);
+TEXT runtime·epollcreate1(SB),NOSPLIT,$0-8
+	MOVW	flags+0(FP), R4
+	MOVW	$SYS_epoll_create1, R2
+	SYSCALL
+	BEQ	R7, 2(PC)
+	SUBU	R2, R0, R2	// caller expects negative errno
+	MOVW	R2, ret+4(FP)
+	RET
+
+// func epollctl(epfd, op, fd int32, ev *epollEvent) int
+TEXT runtime·epollctl(SB),NOSPLIT,$0-20
+	MOVW	epfd+0(FP), R4
+	MOVW	op+4(FP), R5
+	MOVW	fd+8(FP), R6
+	MOVW	ev+12(FP), R7
+	MOVW	$SYS_epoll_ctl, R2
+	SYSCALL
+	SUBU	R2, R0, R2	// caller expects negative errno
+	MOVW	R2, ret+16(FP)
+	RET
+
+// int32 runtime·epollwait(int32 epfd, EpollEvent *ev, int32 nev, int32 timeout);
+TEXT runtime·epollwait(SB),NOSPLIT,$0-20
+	MOVW	epfd+0(FP), R4
+	MOVW	ev+4(FP), R5
+	MOVW	nev+8(FP), R6
+	MOVW	timeout+12(FP), R7
+	MOVW	$SYS_epoll_wait, R2
+	SYSCALL
+	BEQ	R7, 2(PC)
+	SUBU	R2, R0, R2	// caller expects negative errno
+	MOVW	R2, ret+16(FP)
+	RET
+
+// void runtime·closeonexec(int32 fd);
+TEXT runtime·closeonexec(SB),NOSPLIT,$0-4
+	MOVW	fd+0(FP), R4	// fd
+	MOVW	$2, R5	// F_SETFD
+	MOVW	$1, R6	// FD_CLOEXEC
+	MOVW	$SYS_fcntl, R2
+	SYSCALL
+	RET
+
+// func sbrk0() uintptr
+TEXT runtime·sbrk0(SB),NOSPLIT,$0-4
+	// Implemented as brk(NULL).
+	MOVW	$0, R4
+	MOVW	$SYS_brk, R2
+	SYSCALL
+	MOVW	R2, ret+0(FP)
+	RET
+
+TEXT runtime·access(SB),$0-12
+	BREAK // unimplemented, only needed for android; declared in stubs_linux.go
+	MOVW	R0, ret+8(FP)	// for vet
+	RET
+
+TEXT runtime·connect(SB),$0-16
+	BREAK // unimplemented, only needed for android; declared in stubs_linux.go
+	MOVW	R0, ret+12(FP)	// for vet
+	RET
+
+TEXT runtime·socket(SB),$0-16
+	BREAK // unimplemented, only needed for android; declared in stubs_linux.go
+	MOVW	R0, ret+12(FP)	// for vet
+	RET