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sys_darwin_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, Darwin // System calls are implemented in libSystem, this file contains // trampolines that convert from Go to C calling convention. #include "go_asm.h" #include "go_tls.h" #include "textflag.h" #include "cgo/abi_amd64.h" #define CLOCK_REALTIME 0 // Exit the entire program (like C exit) TEXT runtime·exit_trampoline(SB),NOSPLIT,$0 MOVL 0(DI), DI // arg 1 exit status CALL libc_exit(SB) MOVL $0xf1, 0xf1 // crash RET TEXT runtime·open_trampoline(SB),NOSPLIT,$0 MOVL 8(DI), SI // arg 2 flags MOVL 12(DI), DX // arg 3 mode MOVQ 0(DI), DI // arg 1 pathname XORL AX, AX // vararg: say "no float args" CALL libc_open(SB) RET TEXT runtime·close_trampoline(SB),NOSPLIT,$0 MOVL 0(DI), DI // arg 1 fd CALL libc_close(SB) RET TEXT runtime·read_trampoline(SB),NOSPLIT,$0 MOVQ 8(DI), SI // arg 2 buf MOVL 16(DI), DX // arg 3 count MOVL 0(DI), DI // arg 1 fd CALL libc_read(SB) TESTL AX, AX JGE noerr CALL libc_error(SB) MOVL (AX), AX NEGL AX // caller expects negative errno value noerr: RET TEXT runtime·write_trampoline(SB),NOSPLIT,$0 MOVQ 8(DI), SI // arg 2 buf MOVL 16(DI), DX // arg 3 count MOVQ 0(DI), DI // arg 1 fd CALL libc_write(SB) TESTL AX, AX JGE noerr CALL libc_error(SB) MOVL (AX), AX NEGL AX // caller expects negative errno value noerr: RET TEXT runtime·pipe_trampoline(SB),NOSPLIT,$0 CALL libc_pipe(SB) // pointer already in DI TESTL AX, AX JEQ 3(PC) CALL libc_error(SB) // return negative errno value NEGL AX RET TEXT runtime·setitimer_trampoline(SB),NOSPLIT,$0 MOVQ 8(DI), SI // arg 2 new MOVQ 16(DI), DX // arg 3 old MOVL 0(DI), DI // arg 1 which CALL libc_setitimer(SB) RET TEXT runtime·madvise_trampoline(SB), NOSPLIT, $0 MOVQ 8(DI), SI // arg 2 len MOVL 16(DI), DX // arg 3 advice MOVQ 0(DI), DI // arg 1 addr CALL libc_madvise(SB) // ignore failure - maybe pages are locked RET TEXT runtime·mlock_trampoline(SB), NOSPLIT, $0 UNDEF // unimplemented GLOBL timebase<>(SB),NOPTR,$(machTimebaseInfo__size) TEXT runtime·nanotime_trampoline(SB),NOSPLIT,$0 MOVQ DI, BX CALL libc_mach_absolute_time(SB) MOVQ AX, 0(BX) MOVL timebase<>+machTimebaseInfo_numer(SB), SI MOVL timebase<>+machTimebaseInfo_denom(SB), DI // atomic read TESTL DI, DI JNE initialized SUBQ $(machTimebaseInfo__size+15)/16*16, SP MOVQ SP, DI CALL libc_mach_timebase_info(SB) MOVL machTimebaseInfo_numer(SP), SI MOVL machTimebaseInfo_denom(SP), DI ADDQ $(machTimebaseInfo__size+15)/16*16, SP MOVL SI, timebase<>+machTimebaseInfo_numer(SB) MOVL DI, AX XCHGL AX, timebase<>+machTimebaseInfo_denom(SB) // atomic write initialized: MOVL SI, 8(BX) MOVL DI, 12(BX) RET TEXT runtime·walltime_trampoline(SB),NOSPLIT,$0 MOVQ DI, SI // arg 2 timespec MOVL $CLOCK_REALTIME, DI // arg 1 clock_id CALL libc_clock_gettime(SB) RET TEXT runtime·sigaction_trampoline(SB),NOSPLIT,$0 MOVQ 8(DI), SI // arg 2 new MOVQ 16(DI), DX // arg 3 old MOVL 0(DI), DI // arg 1 sig CALL libc_sigaction(SB) TESTL AX, AX JEQ 2(PC) MOVL $0xf1, 0xf1 // crash RET TEXT runtime·sigprocmask_trampoline(SB),NOSPLIT,$0 MOVQ 8(DI), SI // arg 2 new MOVQ 16(DI), DX // arg 3 old MOVL 0(DI), DI // arg 1 how CALL libc_pthread_sigmask(SB) TESTL AX, AX JEQ 2(PC) MOVL $0xf1, 0xf1 // crash RET TEXT runtime·sigaltstack_trampoline(SB),NOSPLIT,$0 MOVQ 8(DI), SI // arg 2 old MOVQ 0(DI), DI // arg 1 new CALL libc_sigaltstack(SB) TESTQ AX, AX JEQ 2(PC) MOVL $0xf1, 0xf1 // crash RET TEXT runtime·raiseproc_trampoline(SB),NOSPLIT,$0 MOVL 0(DI), BX // signal CALL libc_getpid(SB) MOVL AX, DI // arg 1 pid MOVL BX, SI // arg 2 signal CALL libc_kill(SB) 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 // This is the function registered during sigaction and is invoked when // a signal is received. It just redirects to the Go function sigtrampgo. // 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() // Call into the Go signal handler NOP SP // disable vet stack checking ADJSP $24 MOVL DI, 0(SP) // sig MOVQ SI, 8(SP) // info MOVQ DX, 16(SP) // ctx CALL ·sigprofNonGo(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·mmap_trampoline(SB),NOSPLIT,$0 MOVQ DI, BX MOVQ 0(BX), DI // arg 1 addr MOVQ 8(BX), SI // arg 2 len MOVL 16(BX), DX // arg 3 prot MOVL 20(BX), CX // arg 4 flags MOVL 24(BX), R8 // arg 5 fid MOVL 28(BX), R9 // arg 6 offset CALL libc_mmap(SB) XORL DX, DX CMPQ AX, $-1 JNE ok CALL libc_error(SB) MOVLQSX (AX), DX // errno XORL AX, AX ok: MOVQ AX, 32(BX) MOVQ DX, 40(BX) RET TEXT runtime·munmap_trampoline(SB),NOSPLIT,$0 MOVQ 8(DI), SI // arg 2 len MOVQ 0(DI), DI // arg 1 addr CALL libc_munmap(SB) TESTQ AX, AX JEQ 2(PC) MOVL $0xf1, 0xf1 // crash RET TEXT runtime·usleep_trampoline(SB),NOSPLIT,$0 MOVL 0(DI), DI // arg 1 usec CALL libc_usleep(SB) RET TEXT runtime·settls(SB),NOSPLIT,$32 // Nothing to do on Darwin, pthread already set thread-local storage up. RET TEXT runtime·sysctl_trampoline(SB),NOSPLIT,$0 MOVL 8(DI), SI // arg 2 miblen MOVQ 16(DI), DX // arg 3 oldp MOVQ 24(DI), CX // arg 4 oldlenp MOVQ 32(DI), R8 // arg 5 newp MOVQ 40(DI), R9 // arg 6 newlen MOVQ 0(DI), DI // arg 1 mib CALL libc_sysctl(SB) RET TEXT runtime·sysctlbyname_trampoline(SB),NOSPLIT,$0 MOVQ 8(DI), SI // arg 2 oldp MOVQ 16(DI), DX // arg 3 oldlenp MOVQ 24(DI), CX // arg 4 newp MOVQ 32(DI), R8 // arg 5 newlen MOVQ 0(DI), DI // arg 1 name CALL libc_sysctlbyname(SB) RET TEXT runtime·kqueue_trampoline(SB),NOSPLIT,$0 CALL libc_kqueue(SB) RET TEXT runtime·kevent_trampoline(SB),NOSPLIT,$0 MOVQ 8(DI), SI // arg 2 keventt MOVL 16(DI), DX // arg 3 nch MOVQ 24(DI), CX // arg 4 ev MOVL 32(DI), R8 // arg 5 nev MOVQ 40(DI), R9 // arg 6 ts MOVL 0(DI), DI // arg 1 kq CALL libc_kevent(SB) CMPL AX, $-1 JNE ok CALL libc_error(SB) MOVLQSX (AX), AX // errno NEGQ AX // caller wants it as a negative error code ok: RET TEXT runtime·fcntl_trampoline(SB),NOSPLIT,$0 MOVQ DI, BX MOVL 0(BX), DI // arg 1 fd MOVL 4(BX), SI // arg 2 cmd MOVL 8(BX), DX // arg 3 arg XORL AX, AX // vararg: say "no float args" CALL libc_fcntl(SB) XORL DX, DX CMPQ AX, $-1 JNE noerr CALL libc_error(SB) MOVL (AX), DX MOVL $-1, AX noerr: MOVL AX, 12(BX) MOVL DX, 16(BX) RET // mstart_stub is the first function executed on a new thread started by pthread_create. // It just does some low-level setup and then calls mstart. // Note: called with the C calling convention. TEXT runtime·mstart_stub(SB),NOSPLIT|NOFRAME,$0 // DI points to the m. // We are already on m's g0 stack. // Transition from C ABI to Go ABI. PUSH_REGS_HOST_TO_ABI0() MOVQ m_g0(DI), DX // g // Initialize TLS entry. // See cmd/link/internal/ld/sym.go:computeTLSOffset. MOVQ DX, 0x30(GS) CALL runtime·mstart(SB) POP_REGS_HOST_TO_ABI0() // Go is all done with this OS thread. // Tell pthread everything is ok (we never join with this thread, so // the value here doesn't really matter). XORL AX, AX RET // These trampolines help convert from Go calling convention to C calling convention. // They should be called with asmcgocall. // A pointer to the arguments is passed in DI. // A single int32 result is returned in AX. // (For more results, make an args/results structure.) TEXT runtime·pthread_attr_init_trampoline(SB),NOSPLIT,$0 MOVQ 0(DI), DI // arg 1 attr CALL libc_pthread_attr_init(SB) RET TEXT runtime·pthread_attr_getstacksize_trampoline(SB),NOSPLIT,$0 MOVQ 8(DI), SI // arg 2 size MOVQ 0(DI), DI // arg 1 attr CALL libc_pthread_attr_getstacksize(SB) RET TEXT runtime·pthread_attr_setdetachstate_trampoline(SB),NOSPLIT,$0 MOVQ 8(DI), SI // arg 2 state MOVQ 0(DI), DI // arg 1 attr CALL libc_pthread_attr_setdetachstate(SB) RET TEXT runtime·pthread_create_trampoline(SB),NOSPLIT,$16 MOVQ 0(DI), SI // arg 2 attr MOVQ 8(DI), DX // arg 3 start MOVQ 16(DI), CX // arg 4 arg MOVQ SP, DI // arg 1 &threadid (which we throw away) CALL libc_pthread_create(SB) RET TEXT runtime·raise_trampoline(SB),NOSPLIT,$0 MOVL 0(DI), DI // arg 1 signal CALL libc_raise(SB) RET TEXT runtime·pthread_mutex_init_trampoline(SB),NOSPLIT,$0 MOVQ 8(DI), SI // arg 2 attr MOVQ 0(DI), DI // arg 1 mutex CALL libc_pthread_mutex_init(SB) RET TEXT runtime·pthread_mutex_lock_trampoline(SB),NOSPLIT,$0 MOVQ 0(DI), DI // arg 1 mutex CALL libc_pthread_mutex_lock(SB) RET TEXT runtime·pthread_mutex_unlock_trampoline(SB),NOSPLIT,$0 MOVQ 0(DI), DI // arg 1 mutex CALL libc_pthread_mutex_unlock(SB) RET TEXT runtime·pthread_cond_init_trampoline(SB),NOSPLIT,$0 MOVQ 8(DI), SI // arg 2 attr MOVQ 0(DI), DI // arg 1 cond CALL libc_pthread_cond_init(SB) RET TEXT runtime·pthread_cond_wait_trampoline(SB),NOSPLIT,$0 MOVQ 8(DI), SI // arg 2 mutex MOVQ 0(DI), DI // arg 1 cond CALL libc_pthread_cond_wait(SB) RET TEXT runtime·pthread_cond_timedwait_relative_np_trampoline(SB),NOSPLIT,$0 MOVQ 8(DI), SI // arg 2 mutex MOVQ 16(DI), DX // arg 3 timeout MOVQ 0(DI), DI // arg 1 cond CALL libc_pthread_cond_timedwait_relative_np(SB) RET TEXT runtime·pthread_cond_signal_trampoline(SB),NOSPLIT,$0 MOVQ 0(DI), DI // arg 1 cond CALL libc_pthread_cond_signal(SB) RET TEXT runtime·pthread_self_trampoline(SB),NOSPLIT,$0 MOVQ DI, BX // BX is caller-save CALL libc_pthread_self(SB) MOVQ AX, 0(BX) // return value RET TEXT runtime·pthread_kill_trampoline(SB),NOSPLIT,$0 MOVQ 8(DI), SI // arg 2 sig MOVQ 0(DI), DI // arg 1 thread CALL libc_pthread_kill(SB) RET TEXT runtime·osinit_hack_trampoline(SB),NOSPLIT,$0 MOVQ $0, DI // arg 1 val CALL libc_notify_is_valid_token(SB) CALL libc_xpc_date_create_from_current(SB) RET // syscall calls a function in libc on behalf of the syscall package. // syscall takes a pointer to a struct like: // struct { // fn uintptr // a1 uintptr // a2 uintptr // a3 uintptr // r1 uintptr // r2 uintptr // err uintptr // } // syscall must be called on the g0 stack with the // C calling convention (use libcCall). // // syscall expects a 32-bit result and tests for 32-bit -1 // to decide there was an error. TEXT runtime·syscall(SB),NOSPLIT,$16 MOVQ (0*8)(DI), CX // fn MOVQ (2*8)(DI), SI // a2 MOVQ (3*8)(DI), DX // a3 MOVQ DI, (SP) MOVQ (1*8)(DI), DI // a1 XORL AX, AX // vararg: say "no float args" CALL CX MOVQ (SP), DI MOVQ AX, (4*8)(DI) // r1 MOVQ DX, (5*8)(DI) // r2 // Standard libc functions return -1 on error // and set errno. CMPL AX, $-1 // Note: high 32 bits are junk JNE ok // Get error code from libc. CALL libc_error(SB) MOVLQSX (AX), AX MOVQ (SP), DI MOVQ AX, (6*8)(DI) // err ok: XORL AX, AX // no error (it's ignored anyway) RET // syscallX calls a function in libc on behalf of the syscall package. // syscallX takes a pointer to a struct like: // struct { // fn uintptr // a1 uintptr // a2 uintptr // a3 uintptr // r1 uintptr // r2 uintptr // err uintptr // } // syscallX must be called on the g0 stack with the // C calling convention (use libcCall). // // syscallX is like syscall but expects a 64-bit result // and tests for 64-bit -1 to decide there was an error. TEXT runtime·syscallX(SB),NOSPLIT,$16 MOVQ (0*8)(DI), CX // fn MOVQ (2*8)(DI), SI // a2 MOVQ (3*8)(DI), DX // a3 MOVQ DI, (SP) MOVQ (1*8)(DI), DI // a1 XORL AX, AX // vararg: say "no float args" CALL CX MOVQ (SP), DI MOVQ AX, (4*8)(DI) // r1 MOVQ DX, (5*8)(DI) // r2 // Standard libc functions return -1 on error // and set errno. CMPQ AX, $-1 JNE ok // Get error code from libc. CALL libc_error(SB) MOVLQSX (AX), AX MOVQ (SP), DI MOVQ AX, (6*8)(DI) // err ok: XORL AX, AX // no error (it's ignored anyway) RET // syscallPtr is like syscallX except that the libc function reports an // error by returning NULL and setting errno. TEXT runtime·syscallPtr(SB),NOSPLIT,$16 MOVQ (0*8)(DI), CX // fn MOVQ (2*8)(DI), SI // a2 MOVQ (3*8)(DI), DX // a3 MOVQ DI, (SP) MOVQ (1*8)(DI), DI // a1 XORL AX, AX // vararg: say "no float args" CALL CX MOVQ (SP), DI MOVQ AX, (4*8)(DI) // r1 MOVQ DX, (5*8)(DI) // r2 // syscallPtr libc functions return NULL on error // and set errno. TESTQ AX, AX JNE ok // Get error code from libc. CALL libc_error(SB) MOVLQSX (AX), AX MOVQ (SP), DI MOVQ AX, (6*8)(DI) // err ok: XORL AX, AX // no error (it's ignored anyway) RET // syscall6 calls a function in libc on behalf of the syscall package. // syscall6 takes a pointer to a struct like: // struct { // fn uintptr // a1 uintptr // a2 uintptr // a3 uintptr // a4 uintptr // a5 uintptr // a6 uintptr // r1 uintptr // r2 uintptr // err uintptr // } // syscall6 must be called on the g0 stack with the // C calling convention (use libcCall). // // syscall6 expects a 32-bit result and tests for 32-bit -1 // to decide there was an error. TEXT runtime·syscall6(SB),NOSPLIT,$16 MOVQ (0*8)(DI), R11// fn MOVQ (2*8)(DI), SI // a2 MOVQ (3*8)(DI), DX // a3 MOVQ (4*8)(DI), CX // a4 MOVQ (5*8)(DI), R8 // a5 MOVQ (6*8)(DI), R9 // a6 MOVQ DI, (SP) MOVQ (1*8)(DI), DI // a1 XORL AX, AX // vararg: say "no float args" CALL R11 MOVQ (SP), DI MOVQ AX, (7*8)(DI) // r1 MOVQ DX, (8*8)(DI) // r2 CMPL AX, $-1 JNE ok CALL libc_error(SB) MOVLQSX (AX), AX MOVQ (SP), DI MOVQ AX, (9*8)(DI) // err ok: XORL AX, AX // no error (it's ignored anyway) RET // syscall6X calls a function in libc on behalf of the syscall package. // syscall6X takes a pointer to a struct like: // struct { // fn uintptr // a1 uintptr // a2 uintptr // a3 uintptr // a4 uintptr // a5 uintptr // a6 uintptr // r1 uintptr // r2 uintptr // err uintptr // } // syscall6X must be called on the g0 stack with the // C calling convention (use libcCall). // // syscall6X is like syscall6 but expects a 64-bit result // and tests for 64-bit -1 to decide there was an error. TEXT runtime·syscall6X(SB),NOSPLIT,$16 MOVQ (0*8)(DI), R11// fn MOVQ (2*8)(DI), SI // a2 MOVQ (3*8)(DI), DX // a3 MOVQ (4*8)(DI), CX // a4 MOVQ (5*8)(DI), R8 // a5 MOVQ (6*8)(DI), R9 // a6 MOVQ DI, (SP) MOVQ (1*8)(DI), DI // a1 XORL AX, AX // vararg: say "no float args" CALL R11 MOVQ (SP), DI MOVQ AX, (7*8)(DI) // r1 MOVQ DX, (8*8)(DI) // r2 CMPQ AX, $-1 JNE ok CALL libc_error(SB) MOVLQSX (AX), AX MOVQ (SP), DI MOVQ AX, (9*8)(DI) // err ok: XORL AX, AX // no error (it's ignored anyway) RET // syscall9 calls a function in libc on behalf of the syscall package. // syscall9 takes a pointer to a struct like: // struct { // fn uintptr // a1 uintptr // a2 uintptr // a3 uintptr // a4 uintptr // a5 uintptr // a6 uintptr // a7 uintptr // a8 uintptr // a9 uintptr // r1 uintptr // r2 uintptr // err uintptr // } // syscall9 must be called on the g0 stack with the // C calling convention (use libcCall). // // syscall9 expects a 32-bit result and tests for 32-bit -1 // to decide there was an error. TEXT runtime·syscall9(SB),NOSPLIT,$16 MOVQ (0*8)(DI), R13// fn MOVQ (2*8)(DI), SI // a2 MOVQ (3*8)(DI), DX // a3 MOVQ (4*8)(DI), CX // a4 MOVQ (5*8)(DI), R8 // a5 MOVQ (6*8)(DI), R9 // a6 MOVQ (7*8)(DI), R10 // a7 MOVQ (8*8)(DI), R11 // a8 MOVQ (9*8)(DI), R12 // a9 MOVQ DI, (SP) MOVQ (1*8)(DI), DI // a1 XORL AX, AX // vararg: say "no float args" CALL R13 MOVQ (SP), DI MOVQ AX, (10*8)(DI) // r1 MOVQ DX, (11*8)(DI) // r2 CMPL AX, $-1 JNE ok CALL libc_error(SB) MOVLQSX (AX), AX MOVQ (SP), DI MOVQ AX, (12*8)(DI) // err ok: XORL AX, AX // no error (it's ignored anyway) RET // syscall_x509 is for crypto/x509. It is like syscall6 but does not check for errors, // takes 5 uintptrs and 1 float64, and only returns one value, // for use with standard C ABI functions. TEXT runtime·syscall_x509(SB),NOSPLIT,$16 MOVQ (0*8)(DI), R11// fn MOVQ (2*8)(DI), SI // a2 MOVQ (3*8)(DI), DX // a3 MOVQ (4*8)(DI), CX // a4 MOVQ (5*8)(DI), R8 // a5 MOVQ (6*8)(DI), X0 // f1 MOVQ DI, (SP) MOVQ (1*8)(DI), DI // a1 XORL AX, AX // vararg: say "no float args" CALL R11 MOVQ (SP), DI MOVQ AX, (7*8)(DI) // r1 XORL AX, AX // no error (it's ignored anyway) RET TEXT runtime·issetugid_trampoline(SB),NOSPLIT,$0 CALL libc_issetugid(SB) RET // mach_vm_region_trampoline calls mach_vm_region from libc. TEXT runtime·mach_vm_region_trampoline(SB),NOSPLIT,$0 MOVQ 0(DI), SI // address MOVQ 8(DI), DX // size MOVL 16(DI), CX // flavor MOVQ 24(DI), R8 // info MOVQ 32(DI), R9 // count MOVQ 40(DI), R10 // object_name MOVQ $libc_mach_task_self_(SB), DI MOVL 0(DI), DI CALL libc_mach_vm_region(SB) RET // proc_regionfilename_trampoline calls proc_regionfilename. TEXT runtime·proc_regionfilename_trampoline(SB),NOSPLIT,$0 MOVQ 8(DI), SI // address MOVQ 16(DI), DX // buffer MOVQ 24(DI), CX // buffer_size MOVQ 0(DI), DI // pid CALL libc_proc_regionfilename(SB) RET
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