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sys_freebsd_amd64.s
// Copyright 2009 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 AMD64, FreeBSD // /usr/src/sys/kern/syscalls.master for syscall numbers. // #include "go_asm.h" #include "go_tls.h" #include "textflag.h" #include "cgo/abi_amd64.h" #define CLOCK_REALTIME 0 #define CLOCK_MONOTONIC 4 #define AMD64_SET_FSBASE 129 #define SYS_exit 1 #define SYS_read 3 #define SYS_write 4 #define SYS_open 5 #define SYS_close 6 #define SYS_getpid 20 #define SYS_kill 37 #define SYS_sigaltstack 53 #define SYS_munmap 73 #define SYS_madvise 75 #define SYS_setitimer 83 #define SYS_fcntl 92 #define SYS_sysarch 165 #define SYS___sysctl 202 #define SYS_clock_gettime 232 #define SYS_nanosleep 240 #define SYS_issetugid 253 #define SYS_sched_yield 331 #define SYS_sigprocmask 340 #define SYS_kqueue 362 #define SYS_sigaction 416 #define SYS_thr_exit 431 #define SYS_thr_self 432 #define SYS_thr_kill 433 #define SYS__umtx_op 454 #define SYS_thr_new 455 #define SYS_mmap 477 #define SYS_cpuset_getaffinity 487 #define SYS_pipe2 542 #define SYS_kevent 560 TEXT runtime·sys_umtx_op(SB),NOSPLIT,$0 MOVQ addr+0(FP), DI MOVL mode+8(FP), SI MOVL val+12(FP), DX MOVQ uaddr1+16(FP), R10 MOVQ ut+24(FP), R8 MOVL $SYS__umtx_op, AX SYSCALL JCC 2(PC) NEGQ AX MOVL AX, ret+32(FP) RET TEXT runtime·thr_new(SB),NOSPLIT,$0 MOVQ param+0(FP), DI MOVL size+8(FP), SI MOVL $SYS_thr_new, AX SYSCALL JCC 2(PC) NEGQ AX MOVL AX, ret+16(FP) RET TEXT runtime·thr_start(SB),NOSPLIT,$0 MOVQ DI, R13 // m // set up FS to point at m->tls LEAQ m_tls(R13), DI CALL runtime·settls(SB) // smashes DI // set up m, g get_tls(CX) MOVQ m_g0(R13), DI MOVQ R13, g_m(DI) MOVQ DI, g(CX) CALL runtime·stackcheck(SB) CALL runtime·mstart(SB) MOVQ 0, AX // crash (not reached) // Exit the entire program (like C exit) TEXT runtime·exit(SB),NOSPLIT,$-8 MOVL code+0(FP), DI // arg 1 exit status MOVL $SYS_exit, AX SYSCALL MOVL $0xf1, 0xf1 // crash RET // func exitThread(wait *atomic.uint32) TEXT runtime·exitThread(SB),NOSPLIT,$0-8 MOVQ wait+0(FP), AX // We're done using the stack. MOVL $0, (AX) MOVL $0, DI // arg 1 long *state MOVL $SYS_thr_exit, AX SYSCALL MOVL $0xf1, 0xf1 // crash JMP 0(PC) TEXT runtime·open(SB),NOSPLIT,$-8 MOVQ name+0(FP), DI // arg 1 pathname MOVL mode+8(FP), SI // arg 2 flags MOVL perm+12(FP), DX // arg 3 mode MOVL $SYS_open, AX SYSCALL JCC 2(PC) MOVL $-1, AX MOVL AX, ret+16(FP) RET TEXT runtime·closefd(SB),NOSPLIT,$-8 MOVL fd+0(FP), DI // arg 1 fd MOVL $SYS_close, AX SYSCALL JCC 2(PC) MOVL $-1, AX MOVL AX, ret+8(FP) RET TEXT runtime·read(SB),NOSPLIT,$-8 MOVL fd+0(FP), DI // arg 1 fd MOVQ p+8(FP), SI // arg 2 buf MOVL n+16(FP), DX // arg 3 count MOVL $SYS_read, AX SYSCALL JCC 2(PC) NEGQ AX // caller expects negative errno MOVL AX, ret+24(FP) RET // func pipe2(flags int32) (r, w int32, errno int32) TEXT runtime·pipe2(SB),NOSPLIT,$0-20 LEAQ r+8(FP), DI MOVL flags+0(FP), SI MOVL $SYS_pipe2, AX SYSCALL JCC 2(PC) NEGQ AX MOVL AX, errno+16(FP) RET TEXT runtime·write1(SB),NOSPLIT,$-8 MOVQ fd+0(FP), DI // arg 1 fd MOVQ p+8(FP), SI // arg 2 buf MOVL n+16(FP), DX // arg 3 count MOVL $SYS_write, AX SYSCALL JCC 2(PC) NEGQ AX // caller expects negative errno MOVL AX, ret+24(FP) RET TEXT runtime·thr_self(SB),NOSPLIT,$0-8 // thr_self(&0(FP)) LEAQ ret+0(FP), DI // arg 1 MOVL $SYS_thr_self, AX SYSCALL RET TEXT runtime·thr_kill(SB),NOSPLIT,$0-16 // thr_kill(tid, sig) MOVQ tid+0(FP), DI // arg 1 id MOVQ sig+8(FP), SI // arg 2 sig MOVL $SYS_thr_kill, AX SYSCALL RET TEXT runtime·raiseproc(SB),NOSPLIT,$0 // getpid MOVL $SYS_getpid, AX SYSCALL // kill(self, sig) MOVQ AX, DI // arg 1 pid MOVL sig+0(FP), SI // arg 2 sig MOVL $SYS_kill, AX SYSCALL RET TEXT runtime·setitimer(SB), NOSPLIT, $-8 MOVL mode+0(FP), DI MOVQ new+8(FP), SI MOVQ old+16(FP), DX MOVL $SYS_setitimer, AX SYSCALL RET // func fallback_walltime() (sec int64, nsec int32) TEXT runtime·fallback_walltime(SB), NOSPLIT, $32-12 MOVL $SYS_clock_gettime, AX MOVQ $CLOCK_REALTIME, DI LEAQ 8(SP), SI SYSCALL MOVQ 8(SP), AX // sec MOVQ 16(SP), DX // nsec // sec is in AX, nsec in DX MOVQ AX, sec+0(FP) MOVL DX, nsec+8(FP) RET TEXT runtime·fallback_nanotime(SB), NOSPLIT, $32-8 MOVL $SYS_clock_gettime, AX MOVQ $CLOCK_MONOTONIC, DI LEAQ 8(SP), SI SYSCALL MOVQ 8(SP), AX // sec MOVQ 16(SP), DX // nsec // sec is in AX, nsec in DX // return nsec in AX IMULQ $1000000000, AX ADDQ DX, AX MOVQ AX, ret+0(FP) RET TEXT runtime·asmSigaction(SB),NOSPLIT,$0 MOVQ sig+0(FP), DI // arg 1 sig MOVQ new+8(FP), SI // arg 2 act MOVQ old+16(FP), DX // arg 3 oact MOVL $SYS_sigaction, AX SYSCALL JCC 2(PC) MOVL $-1, AX MOVL AX, ret+24(FP) RET TEXT runtime·callCgoSigaction(SB),NOSPLIT,$16 MOVQ sig+0(FP), DI // arg 1 sig MOVQ new+8(FP), SI // arg 2 act MOVQ old+16(FP), DX // arg 3 oact MOVQ _cgo_sigaction(SB), AX MOVQ SP, BX // callee-saved ANDQ $~15, SP // alignment as per amd64 psABI CALL AX MOVQ BX, SP MOVL AX, ret+24(FP) RET TEXT runtime·sigfwd(SB),NOSPLIT,$0-32 MOVQ fn+0(FP), AX MOVL sig+8(FP), DI MOVQ info+16(FP), SI MOVQ ctx+24(FP), DX MOVQ SP, BX // callee-saved ANDQ $~15, SP // alignment for x86_64 ABI CALL AX MOVQ BX, SP RET // Called using C ABI. TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME|NOFRAME,$0 // Transition from C ABI to Go ABI. PUSH_REGS_HOST_TO_ABI0() // Set up ABIInternal environment: g in R14, cleared X15. get_tls(R12) MOVQ g(R12), R14 PXOR X15, X15 // Reserve space for spill slots. NOP SP // disable vet stack checking ADJSP $24 // Call into the Go signal handler MOVQ DI, AX // sig MOVQ SI, BX // info MOVQ DX, CX // ctx CALL ·sigtrampgo<ABIInternal>(SB) ADJSP $-24 POP_REGS_HOST_TO_ABI0() RET // Called using C ABI. TEXT runtime·sigprofNonGoWrapper<>(SB),NOSPLIT|NOFRAME,$0 // Transition from C ABI to Go ABI. PUSH_REGS_HOST_TO_ABI0() // Set up ABIInternal environment: g in R14, cleared X15. get_tls(R12) MOVQ g(R12), R14 PXOR X15, X15 // Reserve space for spill slots. NOP SP // disable vet stack checking ADJSP $24 // Call into the Go signal handler MOVQ DI, AX // sig MOVQ SI, BX // info MOVQ DX, CX // ctx CALL ·sigprofNonGo<ABIInternal>(SB) ADJSP $-24 POP_REGS_HOST_TO_ABI0() RET // Used instead of sigtramp in programs that use cgo. // Arguments from kernel are in DI, SI, DX. TEXT runtime·cgoSigtramp(SB),NOSPLIT,$0 // If no traceback function, do usual sigtramp. MOVQ runtime·cgoTraceback(SB), AX TESTQ AX, AX JZ sigtramp // If no traceback support function, which means that // runtime/cgo was not linked in, do usual sigtramp. MOVQ _cgo_callers(SB), AX TESTQ AX, AX JZ sigtramp // Figure out if we are currently in a cgo call. // If not, just do usual sigtramp. get_tls(CX) MOVQ g(CX),AX TESTQ AX, AX JZ sigtrampnog // g == nil MOVQ g_m(AX), AX TESTQ AX, AX JZ sigtramp // g.m == nil MOVL m_ncgo(AX), CX TESTL CX, CX JZ sigtramp // g.m.ncgo == 0 MOVQ m_curg(AX), CX TESTQ CX, CX JZ sigtramp // g.m.curg == nil MOVQ g_syscallsp(CX), CX TESTQ CX, CX JZ sigtramp // g.m.curg.syscallsp == 0 MOVQ m_cgoCallers(AX), R8 TESTQ R8, R8 JZ sigtramp // g.m.cgoCallers == nil MOVL m_cgoCallersUse(AX), CX TESTL CX, CX JNZ sigtramp // g.m.cgoCallersUse != 0 // Jump to a function in runtime/cgo. // That function, written in C, will call the user's traceback // function with proper unwind info, and will then call back here. // The first three arguments, and the fifth, are already in registers. // Set the two remaining arguments now. MOVQ runtime·cgoTraceback(SB), CX MOVQ $runtime·sigtramp(SB), R9 MOVQ _cgo_callers(SB), AX JMP AX sigtramp: JMP runtime·sigtramp(SB) sigtrampnog: // Signal arrived on a non-Go thread. If this is SIGPROF, get a // stack trace. CMPL DI, $27 // 27 == SIGPROF JNZ sigtramp // Lock sigprofCallersUse. MOVL $0, AX MOVL $1, CX MOVQ $runtime·sigprofCallersUse(SB), R11 LOCK CMPXCHGL CX, 0(R11) JNZ sigtramp // Skip stack trace if already locked. // Jump to the traceback function in runtime/cgo. // It will call back to sigprofNonGo, via sigprofNonGoWrapper, to convert // the arguments to the Go calling convention. // First three arguments to traceback function are in registers already. MOVQ runtime·cgoTraceback(SB), CX MOVQ $runtime·sigprofCallers(SB), R8 MOVQ $runtime·sigprofNonGoWrapper<>(SB), R9 MOVQ _cgo_callers(SB), AX JMP AX TEXT runtime·sysMmap(SB),NOSPLIT,$0 MOVQ addr+0(FP), DI // arg 1 addr MOVQ n+8(FP), SI // arg 2 len MOVL prot+16(FP), DX // arg 3 prot MOVL flags+20(FP), R10 // arg 4 flags MOVL fd+24(FP), R8 // arg 5 fid MOVL off+28(FP), R9 // arg 6 offset MOVL $SYS_mmap, AX SYSCALL JCC ok MOVQ $0, p+32(FP) MOVQ AX, err+40(FP) RET ok: MOVQ AX, p+32(FP) MOVQ $0, err+40(FP) RET // Call the function stored in _cgo_mmap using the GCC calling convention. // This must be called on the system stack. TEXT runtime·callCgoMmap(SB),NOSPLIT,$16 MOVQ addr+0(FP), DI MOVQ n+8(FP), SI MOVL prot+16(FP), DX MOVL flags+20(FP), CX MOVL fd+24(FP), R8 MOVL off+28(FP), R9 MOVQ _cgo_mmap(SB), AX MOVQ SP, BX ANDQ $~15, SP // alignment as per amd64 psABI MOVQ BX, 0(SP) CALL AX MOVQ 0(SP), SP MOVQ AX, ret+32(FP) RET TEXT runtime·sysMunmap(SB),NOSPLIT,$0 MOVQ addr+0(FP), DI // arg 1 addr MOVQ n+8(FP), SI // arg 2 len MOVL $SYS_munmap, AX SYSCALL JCC 2(PC) MOVL $0xf1, 0xf1 // crash RET // Call the function stored in _cgo_munmap using the GCC calling convention. // This must be called on the system stack. TEXT runtime·callCgoMunmap(SB),NOSPLIT,$16-16 MOVQ addr+0(FP), DI MOVQ n+8(FP), SI MOVQ _cgo_munmap(SB), AX MOVQ SP, BX ANDQ $~15, SP // alignment as per amd64 psABI MOVQ BX, 0(SP) CALL AX MOVQ 0(SP), SP RET TEXT runtime·madvise(SB),NOSPLIT,$0 MOVQ addr+0(FP), DI MOVQ n+8(FP), SI MOVL flags+16(FP), DX MOVQ $SYS_madvise, AX SYSCALL JCC 2(PC) MOVL $-1, AX MOVL AX, ret+24(FP) RET TEXT runtime·sigaltstack(SB),NOSPLIT,$-8 MOVQ new+0(FP), DI MOVQ old+8(FP), SI MOVQ $SYS_sigaltstack, AX SYSCALL JCC 2(PC) MOVL $0xf1, 0xf1 // crash RET TEXT runtime·usleep(SB),NOSPLIT,$16 MOVL $0, DX MOVL usec+0(FP), AX MOVL $1000000, CX DIVL CX MOVQ AX, 0(SP) // tv_sec MOVL $1000, AX MULL DX MOVQ AX, 8(SP) // tv_nsec MOVQ SP, DI // arg 1 - rqtp MOVQ $0, SI // arg 2 - rmtp MOVL $SYS_nanosleep, AX SYSCALL RET // set tls base to DI TEXT runtime·settls(SB),NOSPLIT,$8 ADDQ $8, DI // adjust for ELF: wants to use -8(FS) for g and m MOVQ DI, 0(SP) MOVQ SP, SI MOVQ $AMD64_SET_FSBASE, DI MOVQ $SYS_sysarch, AX SYSCALL JCC 2(PC) MOVL $0xf1, 0xf1 // crash RET TEXT runtime·sysctl(SB),NOSPLIT,$0 MOVQ mib+0(FP), DI // arg 1 - name MOVL miblen+8(FP), SI // arg 2 - namelen MOVQ out+16(FP), DX // arg 3 - oldp MOVQ size+24(FP), R10 // arg 4 - oldlenp MOVQ dst+32(FP), R8 // arg 5 - newp MOVQ ndst+40(FP), R9 // arg 6 - newlen MOVQ $SYS___sysctl, AX SYSCALL JCC 4(PC) NEGQ AX MOVL AX, ret+48(FP) RET MOVL $0, AX MOVL AX, ret+48(FP) RET TEXT runtime·osyield(SB),NOSPLIT,$-4 MOVL $SYS_sched_yield, AX SYSCALL RET TEXT runtime·sigprocmask(SB),NOSPLIT,$0 MOVL how+0(FP), DI // arg 1 - how MOVQ new+8(FP), SI // arg 2 - set MOVQ old+16(FP), DX // arg 3 - oset MOVL $SYS_sigprocmask, AX SYSCALL JAE 2(PC) MOVL $0xf1, 0xf1 // crash RET // int32 runtime·kqueue(void); TEXT runtime·kqueue(SB),NOSPLIT,$0 MOVQ $0, DI MOVQ $0, SI MOVQ $0, DX MOVL $SYS_kqueue, AX SYSCALL JCC 2(PC) NEGQ AX MOVL AX, ret+0(FP) RET // int32 runtime·kevent(int kq, Kevent *changelist, int nchanges, Kevent *eventlist, int nevents, Timespec *timeout); TEXT runtime·kevent(SB),NOSPLIT,$0 MOVL kq+0(FP), DI MOVQ ch+8(FP), SI MOVL nch+16(FP), DX MOVQ ev+24(FP), R10 MOVL nev+32(FP), R8 MOVQ ts+40(FP), R9 MOVL $SYS_kevent, AX SYSCALL JCC 2(PC) NEGQ AX MOVL AX, ret+48(FP) RET // func fcntl(fd, cmd, arg int32) (int32, int32) TEXT runtime·fcntl(SB),NOSPLIT,$0 MOVL fd+0(FP), DI // fd MOVL cmd+4(FP), SI // cmd MOVL arg+8(FP), DX // arg MOVL $SYS_fcntl, AX SYSCALL JCC noerr MOVL $-1, ret+16(FP) MOVL AX, errno+20(FP) RET noerr: MOVL AX, ret+16(FP) MOVL $0, errno+20(FP) RET // func cpuset_getaffinity(level int, which int, id int64, size int, mask *byte) int32 TEXT runtime·cpuset_getaffinity(SB), NOSPLIT, $0-44 MOVQ level+0(FP), DI MOVQ which+8(FP), SI MOVQ id+16(FP), DX MOVQ size+24(FP), R10 MOVQ mask+32(FP), R8 MOVL $SYS_cpuset_getaffinity, AX SYSCALL JCC 2(PC) NEGQ AX MOVL AX, ret+40(FP) RET // func issetugid() int32 TEXT runtime·issetugid(SB),NOSPLIT,$0 MOVQ $0, DI MOVQ $0, SI MOVQ $0, DX MOVL $SYS_issetugid, AX SYSCALL MOVL AX, ret+0(FP) RET
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