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-rw-r--r--src/runtime/sys_linux_mips64x.s588
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diff --git a/src/runtime/sys_linux_mips64x.s b/src/runtime/sys_linux_mips64x.s
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+++ b/src/runtime/sys_linux_mips64x.s
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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.
+
+//go:build linux && (mips64 || mips64le)
+
+//
+// System calls and other sys.stuff for mips64, Linux
+//
+
+#include "go_asm.h"
+#include "go_tls.h"
+#include "textflag.h"
+
+#define AT_FDCWD -100
+
+#define SYS_exit 5058
+#define SYS_read 5000
+#define SYS_write 5001
+#define SYS_close 5003
+#define SYS_getpid 5038
+#define SYS_kill 5060
+#define SYS_mmap 5009
+#define SYS_munmap 5011
+#define SYS_setitimer 5036
+#define SYS_clone 5055
+#define SYS_nanosleep 5034
+#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_madvise 5027
+#define SYS_mincore 5026
+#define SYS_gettid 5178
+#define SYS_futex 5194
+#define SYS_sched_getaffinity 5196
+#define SYS_exit_group 5205
+#define SYS_timer_create 5216
+#define SYS_timer_settime 5217
+#define SYS_timer_delete 5220
+#define SYS_tgkill 5225
+#define SYS_openat 5247
+#define SYS_clock_gettime 5222
+#define SYS_brk 5012
+#define SYS_pipe2 5287
+
+TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0-4
+ MOVW code+0(FP), R4
+ MOVV $SYS_exit_group, R2
+ SYSCALL
+ RET
+
+// func exitThread(wait *atomic.Uint32)
+TEXT runtime·exitThread(SB),NOSPLIT|NOFRAME,$0-8
+ MOVV wait+0(FP), R1
+ // We're done using the stack.
+ MOVW $0, R2
+ SYNC
+ MOVW R2, (R1)
+ SYNC
+ MOVW $0, R4 // exit code
+ MOVV $SYS_exit, R2
+ SYSCALL
+ JMP 0(PC)
+
+TEXT runtime·open(SB),NOSPLIT|NOFRAME,$0-20
+ // This uses openat instead of open, because Android O blocks open.
+ MOVW $AT_FDCWD, R4 // AT_FDCWD, so this acts like open
+ MOVV name+0(FP), R5
+ MOVW mode+8(FP), R6
+ MOVW perm+12(FP), R7
+ MOVV $SYS_openat, R2
+ SYSCALL
+ BEQ R7, 2(PC)
+ MOVW $-1, R2
+ MOVW R2, ret+16(FP)
+ RET
+
+TEXT runtime·closefd(SB),NOSPLIT|NOFRAME,$0-12
+ 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·write1(SB),NOSPLIT|NOFRAME,$0-28
+ MOVV fd+0(FP), R4
+ MOVV p+8(FP), R5
+ MOVW n+16(FP), R6
+ MOVV $SYS_write, R2
+ SYSCALL
+ BEQ R7, 2(PC)
+ SUBVU R2, R0, R2 // caller expects negative errno
+ MOVW R2, ret+24(FP)
+ RET
+
+TEXT runtime·read(SB),NOSPLIT|NOFRAME,$0-28
+ MOVW fd+0(FP), R4
+ MOVV p+8(FP), R5
+ MOVW n+16(FP), R6
+ MOVV $SYS_read, R2
+ SYSCALL
+ BEQ R7, 2(PC)
+ SUBVU R2, R0, R2 // caller expects negative errno
+ MOVW R2, ret+24(FP)
+ RET
+
+// func pipe2(flags int32) (r, w int32, errno int32)
+TEXT runtime·pipe2(SB),NOSPLIT|NOFRAME,$0-20
+ MOVV $r+8(FP), R4
+ MOVW flags+0(FP), R5
+ MOVV $SYS_pipe2, R2
+ SYSCALL
+ BEQ R7, 2(PC)
+ SUBVU R2, R0, R2 // caller expects negative errno
+ MOVW R2, errno+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)
+ MOVW $1000, R4
+ MULVU R3, R4
+ MOVV LO, R4
+ SUBVU R4, R5
+ MOVV R5, 16(R29)
+
+ // nanosleep(&ts, 0)
+ ADDV $8, R29, R4
+ MOVW $0, R5
+ MOVV $SYS_nanosleep, 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|NOFRAME,$0
+ MOVV $SYS_getpid, R2
+ SYSCALL
+ MOVW R2, R16
+ MOVV $SYS_gettid, R2
+ SYSCALL
+ MOVW R2, R5 // arg 2 tid
+ MOVW R16, R4 // arg 1 pid
+ MOVW sig+0(FP), R6 // arg 3
+ MOVV $SYS_tgkill, R2
+ SYSCALL
+ RET
+
+TEXT runtime·raiseproc(SB),NOSPLIT|NOFRAME,$0
+ 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 ·getpid(SB),NOSPLIT|NOFRAME,$0-8
+ MOVV $SYS_getpid, R2
+ SYSCALL
+ MOVV R2, ret+0(FP)
+ RET
+
+TEXT ·tgkill(SB),NOSPLIT|NOFRAME,$0-24
+ MOVV tgid+0(FP), R4
+ MOVV tid+8(FP), R5
+ MOVV sig+16(FP), R6
+ MOVV $SYS_tgkill, R2
+ SYSCALL
+ RET
+
+TEXT runtime·setitimer(SB),NOSPLIT|NOFRAME,$0-24
+ MOVW mode+0(FP), R4
+ MOVV new+8(FP), R5
+ MOVV old+16(FP), R6
+ MOVV $SYS_setitimer, R2
+ SYSCALL
+ RET
+
+TEXT runtime·timer_create(SB),NOSPLIT,$0-28
+ MOVW clockid+0(FP), R4
+ MOVV sevp+8(FP), R5
+ MOVV timerid+16(FP), R6
+ MOVV $SYS_timer_create, R2
+ SYSCALL
+ MOVW R2, ret+24(FP)
+ RET
+
+TEXT runtime·timer_settime(SB),NOSPLIT,$0-28
+ MOVW timerid+0(FP), R4
+ MOVW flags+4(FP), R5
+ MOVV new+8(FP), R6
+ MOVV old+16(FP), R7
+ MOVV $SYS_timer_settime, R2
+ SYSCALL
+ MOVW R2, ret+24(FP)
+ RET
+
+TEXT runtime·timer_delete(SB),NOSPLIT,$0-12
+ MOVW timerid+0(FP), R4
+ MOVV $SYS_timer_delete, R2
+ SYSCALL
+ MOVW R2, ret+8(FP)
+ RET
+
+TEXT runtime·mincore(SB),NOSPLIT|NOFRAME,$0-28
+ 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 walltime() (sec int64, nsec int32)
+TEXT runtime·walltime(SB),NOSPLIT,$16-12
+ MOVV R29, R16 // R16 is unchanged by C code
+ MOVV R29, R1
+
+ MOVV g_m(g), R17 // R17 = m
+
+ // Set vdsoPC and vdsoSP for SIGPROF traceback.
+ // Save the old values on stack and restore them on exit,
+ // so this function is reentrant.
+ MOVV m_vdsoPC(R17), R2
+ MOVV m_vdsoSP(R17), R3
+ MOVV R2, 8(R29)
+ MOVV R3, 16(R29)
+
+ MOVV $ret-8(FP), R2 // caller's SP
+ MOVV R31, m_vdsoPC(R17)
+ MOVV R2, m_vdsoSP(R17)
+
+ MOVV m_curg(R17), R4
+ MOVV g, R5
+ BNE R4, R5, noswitch
+
+ MOVV m_g0(R17), R4
+ MOVV (g_sched+gobuf_sp)(R4), R1 // Set SP to g0 stack
+
+noswitch:
+ SUBV $16, R1
+ AND $~15, R1 // Align for C code
+ MOVV R1, R29
+
+ MOVW $0, R4 // CLOCK_REALTIME
+ MOVV $0(R29), R5
+
+ MOVV runtime·vdsoClockgettimeSym(SB), R25
+ BEQ R25, fallback
+
+ JAL (R25)
+ // check on vdso call return for kernel compatibility
+ // see https://golang.org/issues/39046
+ // if we get any error make fallback permanent.
+ BEQ R2, R0, finish
+ MOVV R0, runtime·vdsoClockgettimeSym(SB)
+ MOVW $0, R4 // CLOCK_REALTIME
+ MOVV $0(R29), R5
+ JMP fallback
+
+finish:
+ MOVV 0(R29), R3 // sec
+ MOVV 8(R29), R5 // nsec
+
+ MOVV R16, R29 // restore SP
+ // Restore vdsoPC, vdsoSP
+ // We don't worry about being signaled between the two stores.
+ // If we are not in a signal handler, we'll restore vdsoSP to 0,
+ // and no one will care about vdsoPC. If we are in a signal handler,
+ // we cannot receive another signal.
+ MOVV 16(R29), R1
+ MOVV R1, m_vdsoSP(R17)
+ MOVV 8(R29), R1
+ MOVV R1, m_vdsoPC(R17)
+
+ MOVV R3, sec+0(FP)
+ MOVW R5, nsec+8(FP)
+ RET
+
+fallback:
+ MOVV $SYS_clock_gettime, R2
+ SYSCALL
+ JMP finish
+
+TEXT runtime·nanotime1(SB),NOSPLIT,$16-8
+ MOVV R29, R16 // R16 is unchanged by C code
+ MOVV R29, R1
+
+ MOVV g_m(g), R17 // R17 = m
+
+ // Set vdsoPC and vdsoSP for SIGPROF traceback.
+ // Save the old values on stack and restore them on exit,
+ // so this function is reentrant.
+ MOVV m_vdsoPC(R17), R2
+ MOVV m_vdsoSP(R17), R3
+ MOVV R2, 8(R29)
+ MOVV R3, 16(R29)
+
+ MOVV $ret-8(FP), R2 // caller's SP
+ MOVV R31, m_vdsoPC(R17)
+ MOVV R2, m_vdsoSP(R17)
+
+ MOVV m_curg(R17), R4
+ MOVV g, R5
+ BNE R4, R5, noswitch
+
+ MOVV m_g0(R17), R4
+ MOVV (g_sched+gobuf_sp)(R4), R1 // Set SP to g0 stack
+
+noswitch:
+ SUBV $16, R1
+ AND $~15, R1 // Align for C code
+ MOVV R1, R29
+
+ MOVW $1, R4 // CLOCK_MONOTONIC
+ MOVV $0(R29), R5
+
+ MOVV runtime·vdsoClockgettimeSym(SB), R25
+ BEQ R25, fallback
+
+ JAL (R25)
+ // see walltime for detail
+ BEQ R2, R0, finish
+ MOVV R0, runtime·vdsoClockgettimeSym(SB)
+ MOVW $1, R4 // CLOCK_MONOTONIC
+ MOVV $0(R29), R5
+ JMP fallback
+
+finish:
+ MOVV 0(R29), R3 // sec
+ MOVV 8(R29), R5 // nsec
+
+ MOVV R16, R29 // restore SP
+ // Restore vdsoPC, vdsoSP
+ // We don't worry about being signaled between the two stores.
+ // If we are not in a signal handler, we'll restore vdsoSP to 0,
+ // and no one will care about vdsoPC. If we are in a signal handler,
+ // we cannot receive another signal.
+ MOVV 16(R29), R1
+ MOVV R1, m_vdsoSP(R17)
+ MOVV 8(R29), R1
+ MOVV R1, m_vdsoPC(R17)
+
+ // 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
+
+fallback:
+ MOVV $SYS_clock_gettime, R2
+ SYSCALL
+ JMP finish
+
+TEXT runtime·rtsigprocmask(SB),NOSPLIT|NOFRAME,$0-28
+ 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|NOFRAME,$0-36
+ 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
+ BEQ R7, 2(PC)
+ SUBVU R2, R0, R2 // caller expects negative errno
+ 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|TOPFRAME,$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|NOFRAME,$0
+ 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
+ BEQ R7, ok
+ MOVV $0, p+32(FP)
+ MOVV R2, err+40(FP)
+ RET
+ok:
+ MOVV R2, p+32(FP)
+ MOVV $0, err+40(FP)
+ RET
+
+TEXT runtime·munmap(SB),NOSPLIT|NOFRAME,$0
+ 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|NOFRAME,$0
+ MOVV addr+0(FP), R4
+ MOVV n+8(FP), R5
+ MOVW flags+16(FP), R6
+ MOVV $SYS_madvise, R2
+ SYSCALL
+ MOVW R2, ret+24(FP)
+ RET
+
+// int64 futex(int32 *uaddr, int32 op, int32 val,
+// struct timespec *timeout, int32 *uaddr2, int32 val2);
+TEXT runtime·futex(SB),NOSPLIT|NOFRAME,$0
+ 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
+ BEQ R7, 2(PC)
+ SUBVU R2, R0, R2 // caller expects negative errno
+ MOVW R2, ret+40(FP)
+ RET
+
+// int64 clone(int32 flags, void *stk, M *mp, G *gp, void (*fn)(void));
+TEXT runtime·clone(SB),NOSPLIT|NOFRAME,$0
+ 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
+ BEQ R7, 2(PC)
+ SUBVU R2, R0, R2 // caller expects negative errno
+
+ // 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|NOFRAME,$0
+ 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|NOFRAME,$0
+ MOVV $SYS_sched_yield, R2
+ SYSCALL
+ RET
+
+TEXT runtime·sched_getaffinity(SB),NOSPLIT|NOFRAME,$0
+ MOVV pid+0(FP), R4
+ MOVV len+8(FP), R5
+ MOVV buf+16(FP), R6
+ MOVV $SYS_sched_getaffinity, R2
+ SYSCALL
+ BEQ R7, 2(PC)
+ SUBVU R2, R0, R2 // caller expects negative errno
+ MOVW R2, ret+24(FP)
+ RET
+
+// func sbrk0() uintptr
+TEXT runtime·sbrk0(SB),NOSPLIT|NOFRAME,$0-8
+ // Implemented as brk(NULL).
+ MOVV $0, R4
+ MOVV $SYS_brk, R2
+ SYSCALL
+ MOVV R2, ret+0(FP)
+ RET
+
+TEXT runtime·access(SB),$0-20
+ MOVV R0, 2(R0) // unimplemented, only needed for android; declared in stubs_linux.go
+ MOVW R0, ret+16(FP) // for vet
+ RET
+
+TEXT runtime·connect(SB),$0-28
+ MOVV R0, 2(R0) // unimplemented, only needed for android; declared in stubs_linux.go
+ MOVW R0, ret+24(FP) // for vet
+ RET
+
+TEXT runtime·socket(SB),$0-20
+ MOVV R0, 2(R0) // unimplemented, only needed for android; declared in stubs_linux.go
+ MOVW R0, ret+16(FP) // for vet
+ RET