| // 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, Darwin |
| // See http://fxr.watson.org/fxr/source/bsd/kern/syscalls.c?v=xnu-1228 |
| // or /usr/include/sys/syscall.h (on a Mac) for system call numbers. |
| // |
| // The low 24 bits are the system call number. |
| // The high 8 bits specify the kind of system call: 1=Mach, 2=BSD, 3=Machine-Dependent. |
| // |
| |
| #include "go_asm.h" |
| #include "go_tls.h" |
| #include "textflag.h" |
| |
| // Exit the entire program (like C exit) |
| TEXT runtime·exit(SB),NOSPLIT,$0 |
| MOVL code+0(FP), DI // arg 1 exit status |
| MOVL $(0x2000000+1), AX // syscall entry |
| SYSCALL |
| MOVL $0xf1, 0xf1 // crash |
| RET |
| |
| // Exit this OS thread (like pthread_exit, which eventually |
| // calls __bsdthread_terminate). |
| TEXT runtime·exit1(SB),NOSPLIT,$0 |
| MOVL code+0(FP), DI // arg 1 exit status |
| MOVL $(0x2000000+361), AX // syscall entry |
| SYSCALL |
| MOVL $0xf1, 0xf1 // crash |
| RET |
| |
| TEXT runtime·open(SB),NOSPLIT,$0 |
| 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 $(0x2000000+5), AX // syscall entry |
| SYSCALL |
| JCC 2(PC) |
| MOVL $-1, AX |
| MOVL AX, ret+16(FP) |
| RET |
| |
| TEXT runtime·closefd(SB),NOSPLIT,$0 |
| MOVL fd+0(FP), DI // arg 1 fd |
| MOVL $(0x2000000+6), AX // syscall entry |
| SYSCALL |
| JCC 2(PC) |
| MOVL $-1, AX |
| MOVL AX, ret+8(FP) |
| RET |
| |
| TEXT runtime·read(SB),NOSPLIT,$0 |
| 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 $(0x2000000+3), AX // syscall entry |
| SYSCALL |
| JCC 2(PC) |
| MOVL $-1, AX |
| MOVL AX, ret+24(FP) |
| RET |
| |
| TEXT runtime·write(SB),NOSPLIT,$0 |
| 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 $(0x2000000+4), AX // syscall entry |
| SYSCALL |
| JCC 2(PC) |
| MOVL $-1, AX |
| MOVL AX, ret+24(FP) |
| RET |
| |
| TEXT runtime·raise(SB),NOSPLIT,$0 |
| // Ideally we'd send the signal to the current thread, |
| // not the whole process, but that's too hard on OS X. |
| JMP runtime·raiseproc(SB) |
| |
| TEXT runtime·raiseproc(SB),NOSPLIT,$24 |
| MOVL $(0x2000000+20), AX // getpid |
| SYSCALL |
| MOVQ AX, DI // arg 1 - pid |
| MOVL sig+0(FP), SI // arg 2 - signal |
| MOVL $1, DX // arg 3 - posix |
| MOVL $(0x2000000+37), AX // kill |
| SYSCALL |
| RET |
| |
| TEXT runtime·setitimer(SB), NOSPLIT, $0 |
| MOVL mode+0(FP), DI |
| MOVQ new+8(FP), SI |
| MOVQ old+16(FP), DX |
| MOVL $(0x2000000+83), AX // syscall entry |
| SYSCALL |
| RET |
| |
| TEXT runtime·madvise(SB), NOSPLIT, $0 |
| MOVQ addr+0(FP), DI // arg 1 addr |
| MOVQ n+8(FP), SI // arg 2 len |
| MOVL flags+16(FP), DX // arg 3 advice |
| MOVL $(0x2000000+75), AX // syscall entry madvise |
| SYSCALL |
| // ignore failure - maybe pages are locked |
| RET |
| |
| // OS X comm page time offsets |
| // http://www.opensource.apple.com/source/xnu/xnu-1699.26.8/osfmk/i386/cpu_capabilities.h |
| #define nt_tsc_base 0x50 |
| #define nt_scale 0x58 |
| #define nt_shift 0x5c |
| #define nt_ns_base 0x60 |
| #define nt_generation 0x68 |
| #define gtod_generation 0x6c |
| #define gtod_ns_base 0x70 |
| #define gtod_sec_base 0x78 |
| |
| TEXT nanotime<>(SB), NOSPLIT, $32 |
| MOVQ $0x7fffffe00000, BP /* comm page base */ |
| // Loop trying to take a consistent snapshot |
| // of the time parameters. |
| timeloop: |
| MOVL gtod_generation(BP), R8 |
| TESTL R8, R8 |
| JZ systime |
| MOVL nt_generation(BP), R9 |
| TESTL R9, R9 |
| JZ timeloop |
| RDTSC |
| MOVQ nt_tsc_base(BP), R10 |
| MOVL nt_scale(BP), R11 |
| MOVQ nt_ns_base(BP), R12 |
| CMPL nt_generation(BP), R9 |
| JNE timeloop |
| MOVQ gtod_ns_base(BP), R13 |
| MOVQ gtod_sec_base(BP), R14 |
| CMPL gtod_generation(BP), R8 |
| JNE timeloop |
| |
| // Gathered all the data we need. Compute time. |
| // ((tsc - nt_tsc_base) * nt_scale) >> 32 + nt_ns_base - gtod_ns_base + gtod_sec_base*1e9 |
| // The multiply and shift extracts the top 64 bits of the 96-bit product. |
| SHLQ $32, DX |
| ADDQ DX, AX |
| SUBQ R10, AX |
| MULQ R11 |
| SHRQ $32, AX:DX |
| ADDQ R12, AX |
| SUBQ R13, AX |
| IMULQ $1000000000, R14 |
| ADDQ R14, AX |
| RET |
| |
| systime: |
| // Fall back to system call (usually first call in this thread). |
| MOVQ SP, DI |
| MOVQ $0, SI |
| MOVQ $0, DX // required as of Sierra; Issue 16570 |
| MOVL $(0x2000000+116), AX |
| SYSCALL |
| CMPQ AX, $0 |
| JNE inreg |
| MOVQ 0(SP), AX |
| MOVL 8(SP), DX |
| inreg: |
| // sec is in AX, usec in DX |
| // return nsec in AX |
| IMULQ $1000000000, AX |
| IMULQ $1000, DX |
| ADDQ DX, AX |
| RET |
| |
| TEXT runtime·nanotime(SB),NOSPLIT,$0-8 |
| CALL nanotime<>(SB) |
| MOVQ AX, ret+0(FP) |
| RET |
| |
| // func now() (sec int64, nsec int32) |
| TEXT time·now(SB),NOSPLIT,$0-12 |
| CALL nanotime<>(SB) |
| |
| // generated code for |
| // func f(x uint64) (uint64, uint64) { return x/1000000000, x%100000000 } |
| // adapted to reduce duplication |
| MOVQ AX, CX |
| MOVQ $1360296554856532783, AX |
| MULQ CX |
| ADDQ CX, DX |
| RCRQ $1, DX |
| SHRQ $29, DX |
| MOVQ DX, sec+0(FP) |
| IMULQ $1000000000, DX |
| SUBQ DX, CX |
| MOVL CX, nsec+8(FP) |
| RET |
| |
| TEXT runtime·sigprocmask(SB),NOSPLIT,$0 |
| MOVL sig+0(FP), DI |
| MOVQ new+8(FP), SI |
| MOVQ old+16(FP), DX |
| MOVL $(0x2000000+329), AX // pthread_sigmask (on OS X, sigprocmask==entire process) |
| SYSCALL |
| JCC 2(PC) |
| MOVL $0xf1, 0xf1 // crash |
| RET |
| |
| TEXT runtime·sigaction(SB),NOSPLIT,$0-24 |
| MOVL mode+0(FP), DI // arg 1 sig |
| MOVQ new+8(FP), SI // arg 2 act |
| MOVQ old+16(FP), DX // arg 3 oact |
| MOVQ old+16(FP), CX // arg 3 oact |
| MOVQ old+16(FP), R10 // arg 3 oact |
| MOVL $(0x2000000+46), AX // syscall entry |
| SYSCALL |
| JCC 2(PC) |
| MOVL $0xf1, 0xf1 // crash |
| 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, BP |
| SUBQ $64, SP |
| ANDQ $~15, SP // alignment for x86_64 ABI |
| CALL AX |
| MOVQ BP, SP |
| RET |
| |
| TEXT runtime·sigreturn(SB),NOSPLIT,$0-12 |
| MOVQ ctx+0(FP), DI |
| MOVL infostyle+8(FP), SI |
| MOVL $(0x2000000+184), AX |
| SYSCALL |
| INT $3 // not reached |
| |
| TEXT runtime·sigtramp(SB),NOSPLIT,$32 |
| MOVQ DI, 0(SP) // fn |
| MOVL SI, 8(SP) // infostyle |
| MOVL DX, 12(SP) // sig |
| MOVQ CX, 16(SP) // info |
| MOVQ R8, 24(SP) // ctx |
| MOVQ $runtime·sigtrampgo(SB), AX |
| CALL AX |
| INT $3 // not reached (see issue 16453) |
| |
| TEXT runtime·mmap(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 $(0x2000000+197), AX // syscall entry |
| SYSCALL |
| MOVQ AX, ret+32(FP) |
| RET |
| |
| TEXT runtime·munmap(SB),NOSPLIT,$0 |
| MOVQ addr+0(FP), DI // arg 1 addr |
| MOVQ n+8(FP), SI // arg 2 len |
| MOVL $(0x2000000+73), AX // syscall entry |
| SYSCALL |
| JCC 2(PC) |
| MOVL $0xf1, 0xf1 // crash |
| RET |
| |
| TEXT runtime·sigaltstack(SB),NOSPLIT,$0 |
| MOVQ new+0(FP), DI |
| MOVQ old+8(FP), SI |
| MOVQ $(0x2000000+53), 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) // sec |
| MOVL DX, 8(SP) // usec |
| |
| // select(0, 0, 0, 0, &tv) |
| MOVL $0, DI |
| MOVL $0, SI |
| MOVL $0, DX |
| MOVL $0, R10 |
| MOVQ SP, R8 |
| MOVL $(0x2000000+93), AX |
| SYSCALL |
| RET |
| |
| // func bsdthread_create(stk, arg unsafe.Pointer, fn uintptr) int32 |
| TEXT runtime·bsdthread_create(SB),NOSPLIT,$0 |
| // Set up arguments to bsdthread_create system call. |
| // The ones in quotes pass through to the thread callback |
| // uninterpreted, so we can put whatever we want there. |
| MOVQ fn+16(FP), DI |
| MOVQ arg+8(FP), SI |
| MOVQ stk+0(FP), DX |
| MOVQ $0x01000000, R8 // flags = PTHREAD_START_CUSTOM |
| MOVQ $0, R9 // paranoia |
| MOVQ $0, R10 // paranoia, "pthread" |
| MOVQ $(0x2000000+360), AX // bsdthread_create |
| SYSCALL |
| JCC 4(PC) |
| NEGQ AX |
| MOVL AX, ret+24(FP) |
| RET |
| MOVL $0, AX |
| MOVL AX, ret+24(FP) |
| RET |
| |
| // The thread that bsdthread_create creates starts executing here, |
| // because we registered this function using bsdthread_register |
| // at startup. |
| // DI = "pthread" |
| // SI = mach thread port |
| // DX = "func" (= fn) |
| // CX = "arg" (= m) |
| // R8 = stack |
| // R9 = flags (= 0) |
| // SP = stack - C_64_REDZONE_LEN (= stack - 128) |
| TEXT runtime·bsdthread_start(SB),NOSPLIT,$0 |
| MOVQ R8, SP // empirically, SP is very wrong but R8 is right |
| |
| PUSHQ DX |
| PUSHQ CX |
| PUSHQ SI |
| |
| // set up thread local storage pointing at m->tls. |
| LEAQ m_tls(CX), DI |
| CALL runtime·settls(SB) |
| |
| POPQ SI |
| POPQ CX |
| POPQ DX |
| |
| get_tls(BX) |
| MOVQ SI, m_procid(CX) // thread port is m->procid |
| MOVQ m_g0(CX), AX |
| MOVQ AX, g(BX) |
| MOVQ CX, g_m(AX) |
| CALL runtime·stackcheck(SB) // smashes AX, CX |
| CALL DX // fn |
| CALL runtime·exit1(SB) |
| RET |
| |
| // func bsdthread_register() int32 |
| // registers callbacks for threadstart (see bsdthread_create above |
| // and wqthread and pthsize (not used). returns 0 on success. |
| TEXT runtime·bsdthread_register(SB),NOSPLIT,$0 |
| MOVQ $runtime·bsdthread_start(SB), DI // threadstart |
| MOVQ $0, SI // wqthread, not used by us |
| MOVQ $0, DX // pthsize, not used by us |
| MOVQ $0, R10 // dummy_value [sic] |
| MOVQ $0, R8 // targetconc_ptr |
| MOVQ $0, R9 // dispatchqueue_offset |
| MOVQ $(0x2000000+366), AX // bsdthread_register |
| SYSCALL |
| JCC 4(PC) |
| NEGQ AX |
| MOVL AX, ret+0(FP) |
| RET |
| MOVL $0, AX |
| MOVL AX, ret+0(FP) |
| RET |
| |
| // Mach system calls use 0x1000000 instead of the BSD's 0x2000000. |
| |
| // func mach_msg_trap(h unsafe.Pointer, op int32, send_size, rcv_size, rcv_name, timeout, notify uint32) int32 |
| TEXT runtime·mach_msg_trap(SB),NOSPLIT,$0 |
| MOVQ h+0(FP), DI |
| MOVL op+8(FP), SI |
| MOVL send_size+12(FP), DX |
| MOVL rcv_size+16(FP), R10 |
| MOVL rcv_name+20(FP), R8 |
| MOVL timeout+24(FP), R9 |
| MOVL notify+28(FP), R11 |
| PUSHQ R11 // seventh arg, on stack |
| MOVL $(0x1000000+31), AX // mach_msg_trap |
| SYSCALL |
| POPQ R11 |
| MOVL AX, ret+32(FP) |
| RET |
| |
| TEXT runtime·mach_task_self(SB),NOSPLIT,$0 |
| MOVL $(0x1000000+28), AX // task_self_trap |
| SYSCALL |
| MOVL AX, ret+0(FP) |
| RET |
| |
| TEXT runtime·mach_thread_self(SB),NOSPLIT,$0 |
| MOVL $(0x1000000+27), AX // thread_self_trap |
| SYSCALL |
| MOVL AX, ret+0(FP) |
| RET |
| |
| TEXT runtime·mach_reply_port(SB),NOSPLIT,$0 |
| MOVL $(0x1000000+26), AX // mach_reply_port |
| SYSCALL |
| MOVL AX, ret+0(FP) |
| RET |
| |
| // Mach provides trap versions of the semaphore ops, |
| // instead of requiring the use of RPC. |
| |
| // func mach_semaphore_wait(sema uint32) int32 |
| TEXT runtime·mach_semaphore_wait(SB),NOSPLIT,$0 |
| MOVL sema+0(FP), DI |
| MOVL $(0x1000000+36), AX // semaphore_wait_trap |
| SYSCALL |
| MOVL AX, ret+8(FP) |
| RET |
| |
| // func mach_semaphore_timedwait(sema, sec, nsec uint32) int32 |
| TEXT runtime·mach_semaphore_timedwait(SB),NOSPLIT,$0 |
| MOVL sema+0(FP), DI |
| MOVL sec+4(FP), SI |
| MOVL nsec+8(FP), DX |
| MOVL $(0x1000000+38), AX // semaphore_timedwait_trap |
| SYSCALL |
| MOVL AX, ret+16(FP) |
| RET |
| |
| // func mach_semaphore_signal(sema uint32) int32 |
| TEXT runtime·mach_semaphore_signal(SB),NOSPLIT,$0 |
| MOVL sema+0(FP), DI |
| MOVL $(0x1000000+33), AX // semaphore_signal_trap |
| SYSCALL |
| MOVL AX, ret+8(FP) |
| RET |
| |
| // func mach_semaphore_signal_all(sema uint32) int32 |
| TEXT runtime·mach_semaphore_signal_all(SB),NOSPLIT,$0 |
| MOVL sema+0(FP), DI |
| MOVL $(0x1000000+34), AX // semaphore_signal_all_trap |
| SYSCALL |
| MOVL AX, ret+8(FP) |
| RET |
| |
| // set tls base to DI |
| TEXT runtime·settls(SB),NOSPLIT,$32 |
| /* |
| * Same as in sys_darwin_386.s:/ugliness, different constant. |
| * See cgo/gcc_darwin_amd64.c for the derivation |
| * of the constant. |
| */ |
| SUBQ $0x8a0, DI |
| |
| MOVL $(0x3000000+3), AX // thread_fast_set_cthread_self - machdep call #3 |
| SYSCALL |
| RET |
| |
| TEXT runtime·sysctl(SB),NOSPLIT,$0 |
| MOVQ mib+0(FP), DI |
| MOVL miblen+8(FP), SI |
| MOVQ out+16(FP), DX |
| MOVQ size+24(FP), R10 |
| MOVQ dst+32(FP), R8 |
| MOVQ ndst+40(FP), R9 |
| MOVL $(0x2000000+202), AX // syscall entry |
| SYSCALL |
| JCC 4(PC) |
| NEGQ AX |
| MOVL AX, ret+48(FP) |
| RET |
| MOVL $0, AX |
| MOVL AX, ret+48(FP) |
| RET |
| |
| // func kqueue() int32 |
| TEXT runtime·kqueue(SB),NOSPLIT,$0 |
| MOVQ $0, DI |
| MOVQ $0, SI |
| MOVQ $0, DX |
| MOVL $(0x2000000+362), AX |
| SYSCALL |
| JCC 2(PC) |
| NEGQ AX |
| MOVL AX, ret+0(FP) |
| RET |
| |
| // func kevent(kq int32, ch *keventt, nch int32, ev *keventt, nev int32, ts *timespec) int32 |
| 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 $(0x2000000+363), AX |
| SYSCALL |
| JCC 2(PC) |
| NEGQ AX |
| MOVL AX, ret+48(FP) |
| RET |
| |
| // func closeonexec(fd int32) |
| TEXT runtime·closeonexec(SB),NOSPLIT,$0 |
| MOVL fd+0(FP), DI // fd |
| MOVQ $2, SI // F_SETFD |
| MOVQ $1, DX // FD_CLOEXEC |
| MOVL $(0x2000000+92), AX // fcntl |
| SYSCALL |
| RET |