Your IP : 172.28.240.42
// Copyright 2022 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.
//
// System calls and other sys.stuff for loong64, Linux
//
#include "go_asm.h"
#include "go_tls.h"
#include "textflag.h"
#include "cgo/abi_loong64.h"
#define AT_FDCWD -100
#define CLOCK_REALTIME 0
#define CLOCK_MONOTONIC 1
#define SYS_exit 93
#define SYS_read 63
#define SYS_write 64
#define SYS_close 57
#define SYS_getpid 172
#define SYS_kill 129
#define SYS_mmap 222
#define SYS_munmap 215
#define SYS_setitimer 103
#define SYS_clone 220
#define SYS_nanosleep 101
#define SYS_sched_yield 124
#define SYS_rt_sigreturn 139
#define SYS_rt_sigaction 134
#define SYS_rt_sigprocmask 135
#define SYS_sigaltstack 132
#define SYS_madvise 233
#define SYS_mincore 232
#define SYS_gettid 178
#define SYS_futex 98
#define SYS_sched_getaffinity 123
#define SYS_exit_group 94
#define SYS_tgkill 131
#define SYS_openat 56
#define SYS_clock_gettime 113
#define SYS_brk 214
#define SYS_pipe2 59
#define SYS_timer_create 107
#define SYS_timer_settime 110
#define SYS_timer_delete 111
// func exit(code int32)
TEXT runtime·exit(SB),NOSPLIT|NOFRAME,$0-4
MOVW code+0(FP), R4
MOVV $SYS_exit_group, R11
SYSCALL
RET
// func exitThread(wait *atomic.Uint32)
TEXT runtime·exitThread(SB),NOSPLIT|NOFRAME,$0-8
MOVV wait+0(FP), R19
// We're done using the stack.
MOVW $0, R11
DBAR
MOVW R11, (R19)
DBAR
MOVW $0, R4 // exit code
MOVV $SYS_exit, R11
SYSCALL
JMP 0(PC)
// func open(name *byte, mode, perm int32) int32
TEXT runtime·open(SB),NOSPLIT|NOFRAME,$0-20
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, R11
SYSCALL
MOVW $-4096, R5
BGEU R5, R4, 2(PC)
MOVW $-1, R4
MOVW R4, ret+16(FP)
RET
// func closefd(fd int32) int32
TEXT runtime·closefd(SB),NOSPLIT|NOFRAME,$0-12
MOVW fd+0(FP), R4
MOVV $SYS_close, R11
SYSCALL
MOVW $-4096, R5
BGEU R5, R4, 2(PC)
MOVW $-1, R4
MOVW R4, ret+8(FP)
RET
// func write1(fd uintptr, p unsafe.Pointer, n int32) int32
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, R11
SYSCALL
MOVW R4, ret+24(FP)
RET
// func read(fd int32, p unsafe.Pointer, n int32) int32
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, R11
SYSCALL
MOVW R4, 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, R11
SYSCALL
MOVW R4, errno+16(FP)
RET
// func usleep(usec uint32)
TEXT runtime·usleep(SB),NOSPLIT,$16-4
MOVWU usec+0(FP), R7
MOVV $1000, R6
MULVU R6, R7, R7
MOVV $1000000000, R6
DIVVU R6, R7, R5 // ts->tv_sec
REMVU R6, R7, R4 // ts->tv_nsec
MOVV R5, 8(R3)
MOVV R4, 16(R3)
// nanosleep(&ts, 0)
ADDV $8, R3, R4
MOVV R0, R5
MOVV $SYS_nanosleep, R11
SYSCALL
RET
// func gettid() uint32
TEXT runtime·gettid(SB),NOSPLIT,$0-4
MOVV $SYS_gettid, R11
SYSCALL
MOVW R4, ret+0(FP)
RET
// func raise(sig uint32)
TEXT runtime·raise(SB),NOSPLIT|NOFRAME,$0
MOVV $SYS_getpid, R11
SYSCALL
MOVW R4, R23
MOVV $SYS_gettid, R11
SYSCALL
MOVW R4, R5 // arg 2 tid
MOVW R23, R4 // arg 1 pid
MOVW sig+0(FP), R6 // arg 3
MOVV $SYS_tgkill, R11
SYSCALL
RET
// func raiseproc(sig uint32)
TEXT runtime·raiseproc(SB),NOSPLIT|NOFRAME,$0
MOVV $SYS_getpid, R11
SYSCALL
//MOVW R4, R4 // arg 1 pid
MOVW sig+0(FP), R5 // arg 2
MOVV $SYS_kill, R11
SYSCALL
RET
// func getpid() int
TEXT ·getpid(SB),NOSPLIT|NOFRAME,$0-8
MOVV $SYS_getpid, R11
SYSCALL
MOVV R4, ret+0(FP)
RET
// func tgkill(tgid, tid, sig int)
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, R11
SYSCALL
RET
// func setitimer(mode int32, new, old *itimerval)
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, R11
SYSCALL
RET
// func timer_create(clockid int32, sevp *sigevent, timerid *int32) int32
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, R11
SYSCALL
MOVW R4, ret+24(FP)
RET
// func timer_settime(timerid int32, flags int32, new, old *itimerspec) int32
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, R11
SYSCALL
MOVW R4, ret+24(FP)
RET
// func timer_delete(timerid int32) int32
TEXT runtime·timer_delete(SB),NOSPLIT,$0-12
MOVW timerid+0(FP), R4
MOVV $SYS_timer_delete, R11
SYSCALL
MOVW R4, ret+8(FP)
RET
// func mincore(addr unsafe.Pointer, n uintptr, dst *byte) int32
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, R11
SYSCALL
MOVW R4, ret+24(FP)
RET
// func walltime() (sec int64, nsec int32)
TEXT runtime·walltime(SB),NOSPLIT,$24-12
MOVV R3, R23 // R23 is unchanged by C code
MOVV R3, R25
MOVV g_m(g), R24 // R24 = 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(R24), R11
MOVV m_vdsoSP(R24), R7
MOVV R11, 8(R3)
MOVV R7, 16(R3)
MOVV $ret-8(FP), R11 // caller's SP
MOVV R1, m_vdsoPC(R24)
MOVV R11, m_vdsoSP(R24)
MOVV m_curg(R24), R4
MOVV g, R5
BNE R4, R5, noswitch
MOVV m_g0(R24), R4
MOVV (g_sched+gobuf_sp)(R4), R25 // Set SP to g0 stack
noswitch:
SUBV $16, R25
AND $~15, R25 // Align for C code
MOVV R25, R3
MOVW $CLOCK_REALTIME, R4
MOVV $0(R3), R5
MOVV runtime·vdsoClockgettimeSym(SB), R20
BEQ R20, fallback
// Store g on gsignal's stack, see sys_linux_arm64.s for detail
MOVBU runtime·iscgo(SB), R25
BNE R25, nosaveg
MOVV m_gsignal(R24), R25 // g.m.gsignal
BEQ R25, nosaveg
BEQ g, R25, nosaveg
MOVV (g_stack+stack_lo)(R25), R25 // g.m.gsignal.stack.lo
MOVV g, (R25)
JAL (R20)
MOVV R0, (R25)
JMP finish
nosaveg:
JAL (R20)
finish:
MOVV 0(R3), R7 // sec
MOVV 8(R3), R5 // nsec
MOVV R23, R3 // 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(R3), R25
MOVV R25, m_vdsoSP(R24)
MOVV 8(R3), R25
MOVV R25, m_vdsoPC(R24)
MOVV R7, sec+0(FP)
MOVW R5, nsec+8(FP)
RET
fallback:
MOVV $SYS_clock_gettime, R11
SYSCALL
JMP finish
// func nanotime1() int64
TEXT runtime·nanotime1(SB),NOSPLIT,$16-8
MOVV R3, R23 // R23 is unchanged by C code
MOVV R3, R25
MOVV g_m(g), R24 // R24 = 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(R24), R11
MOVV m_vdsoSP(R24), R7
MOVV R11, 8(R3)
MOVV R7, 16(R3)
MOVV $ret-8(FP), R11 // caller's SP
MOVV R1, m_vdsoPC(R24)
MOVV R11, m_vdsoSP(R24)
MOVV m_curg(R24), R4
MOVV g, R5
BNE R4, R5, noswitch
MOVV m_g0(R24), R4
MOVV (g_sched+gobuf_sp)(R4), R25 // Set SP to g0 stack
noswitch:
SUBV $16, R25
AND $~15, R25 // Align for C code
MOVV R25, R3
MOVW $CLOCK_MONOTONIC, R4
MOVV $0(R3), R5
MOVV runtime·vdsoClockgettimeSym(SB), R20
BEQ R20, fallback
// Store g on gsignal's stack, see sys_linux_arm64.s for detail
MOVBU runtime·iscgo(SB), R25
BNE R25, nosaveg
MOVV m_gsignal(R24), R25 // g.m.gsignal
BEQ R25, nosaveg
BEQ g, R25, nosaveg
MOVV (g_stack+stack_lo)(R25), R25 // g.m.gsignal.stack.lo
MOVV g, (R25)
JAL (R20)
MOVV R0, (R25)
JMP finish
nosaveg:
JAL (R20)
finish:
MOVV 0(R3), R7 // sec
MOVV 8(R3), R5 // nsec
MOVV R23, R3 // 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(R3), R25
MOVV R25, m_vdsoSP(R24)
MOVV 8(R3), R25
MOVV R25, m_vdsoPC(R24)
// sec is in R7, nsec in R5
// return nsec in R7
MOVV $1000000000, R4
MULVU R4, R7, R7
ADDVU R5, R7
MOVV R7, ret+0(FP)
RET
fallback:
MOVV $SYS_clock_gettime, R11
SYSCALL
JMP finish
// func rtsigprocmask(how int32, new, old *sigset, size int32)
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, R11
SYSCALL
MOVW $-4096, R5
BGEU R5, R4, 2(PC)
MOVV R0, 0xf1(R0) // crash
RET
// func rt_sigaction(sig uintptr, new, old *sigactiont, size uintptr) int32
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, R11
SYSCALL
MOVW R4, ret+32(FP)
RET
// func sigfwd(fn uintptr, sig uint32, info *siginfo, ctx unsafe.Pointer)
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), R20
JAL (R20)
RET
// func sigtramp(signo, ureg, ctxt unsafe.Pointer)
TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$168
MOVW R4, (1*8)(R3)
MOVV R5, (2*8)(R3)
MOVV R6, (3*8)(R3)
// Save callee-save registers in the case of signal forwarding.
// Please refer to https://golang.org/issue/31827 .
SAVE_R22_TO_R31((4*8))
SAVE_F24_TO_F31((14*8))
// this might be called in external code context,
// where g is not set.
MOVB runtime·iscgo(SB), R4
BEQ R4, 2(PC)
JAL runtime·load_g(SB)
MOVV $runtime·sigtrampgo(SB), R4
JAL (R4)
// Restore callee-save registers.
RESTORE_R22_TO_R31((4*8))
RESTORE_F24_TO_F31((14*8))
RET
// func cgoSigtramp()
TEXT runtime·cgoSigtramp(SB),NOSPLIT,$0
JMP runtime·sigtramp(SB)
// func mmap(addr unsafe.Pointer, n uintptr, prot, flags, fd int32, off uint32) (p unsafe.Pointer, err int)
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, R11
SYSCALL
MOVW $-4096, R5
BGEU R5, R4, ok
MOVV $0, p+32(FP)
SUBVU R4, R0, R4
MOVV R4, err+40(FP)
RET
ok:
MOVV R4, p+32(FP)
MOVV $0, err+40(FP)
RET
// func munmap(addr unsafe.Pointer, n uintptr)
TEXT runtime·munmap(SB),NOSPLIT|NOFRAME,$0
MOVV addr+0(FP), R4
MOVV n+8(FP), R5
MOVV $SYS_munmap, R11
SYSCALL
MOVW $-4096, R5
BGEU R5, R4, 2(PC)
MOVV R0, 0xf3(R0) // crash
RET
// func madvise(addr unsafe.Pointer, n uintptr, flags int32)
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, R11
SYSCALL
MOVW R4, ret+24(FP)
RET
// func futex(addr unsafe.Pointer, op int32, val uint32, ts, addr2 unsafe.Pointer, val3 uint32) int32
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, R11
SYSCALL
MOVW R4, 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), R23
MOVV gp+24(FP), R24
MOVV fn+32(FP), R25
MOVV R23, -8(R5)
MOVV R24, -16(R5)
MOVV R25, -24(R5)
MOVV $1234, R23
MOVV R23, -32(R5)
MOVV $SYS_clone, R11
SYSCALL
// In parent, return.
BEQ R4, 3(PC)
MOVW R4, ret+40(FP)
RET
// In child, on new stack.
MOVV -32(R3), R23
MOVV $1234, R19
BEQ R23, R19, 2(PC)
MOVV R0, 0(R0)
// Initialize m->procid to Linux tid
MOVV $SYS_gettid, R11
SYSCALL
MOVV -24(R3), R25 // fn
MOVV -16(R3), R24 // g
MOVV -8(R3), R23 // m
BEQ R23, nog
BEQ R24, nog
MOVV R4, m_procid(R23)
// TODO: setup TLS.
// In child, set up new stack
MOVV R23, g_m(R24)
MOVV R24, g
//CALL runtime·stackcheck(SB)
nog:
// Call fn
JAL (R25)
// It shouldn't return. If it does, exit that thread.
MOVW $111, R4
MOVV $SYS_exit, R11
SYSCALL
JMP -3(PC) // keep exiting
// func sigaltstack(new, old *stackt)
TEXT runtime·sigaltstack(SB),NOSPLIT|NOFRAME,$0
MOVV new+0(FP), R4
MOVV old+8(FP), R5
MOVV $SYS_sigaltstack, R11
SYSCALL
MOVW $-4096, R5
BGEU R5, R4, 2(PC)
MOVV R0, 0xf1(R0) // crash
RET
// func osyield()
TEXT runtime·osyield(SB),NOSPLIT|NOFRAME,$0
MOVV $SYS_sched_yield, R11
SYSCALL
RET
// func sched_getaffinity(pid, len uintptr, buf *uintptr) int32
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, R11
SYSCALL
MOVW R4, 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, R11
SYSCALL
MOVV R4, 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