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Text file src/runtime/sys_dragonfly_amd64.s

Documentation: runtime

     1	// Copyright 2009 The Go Authors. All rights reserved.
     2	// Use of this source code is governed by a BSD-style
     3	// license that can be found in the LICENSE file.
     4	//
     5	// System calls and other sys.stuff for AMD64, FreeBSD
     6	// /usr/src/sys/kern/syscalls.master for syscall numbers.
     7	//
     8	
     9	#include "go_asm.h"
    10	#include "go_tls.h"
    11	#include "textflag.h"
    12		
    13	TEXT runtime·sys_umtx_sleep(SB),NOSPLIT,$0
    14		MOVQ addr+0(FP), DI		// arg 1 - ptr
    15		MOVL val+8(FP), SI		// arg 2 - value
    16		MOVL timeout+12(FP), DX		// arg 3 - timeout
    17		MOVL $469, AX		// umtx_sleep
    18		SYSCALL
    19		JCC	2(PC)
    20		NEGQ	AX
    21		MOVL	AX, ret+16(FP)
    22		RET
    23	
    24	TEXT runtime·sys_umtx_wakeup(SB),NOSPLIT,$0
    25		MOVQ addr+0(FP), DI		// arg 1 - ptr
    26		MOVL val+8(FP), SI		// arg 2 - count
    27		MOVL $470, AX		// umtx_wakeup
    28		SYSCALL
    29		JCC	2(PC)
    30		NEGQ	AX
    31		MOVL	AX, ret+16(FP)
    32		RET
    33	
    34	TEXT runtime·lwp_create(SB),NOSPLIT,$0
    35		MOVQ param+0(FP), DI		// arg 1 - params
    36		MOVL $495, AX		// lwp_create
    37		SYSCALL
    38		MOVL	AX, ret+8(FP)
    39		RET
    40	
    41	TEXT runtime·lwp_start(SB),NOSPLIT,$0
    42		MOVQ	DI, R13 // m
    43	
    44		// set up FS to point at m->tls
    45		LEAQ	m_tls(R13), DI
    46		CALL	runtime·settls(SB)	// smashes DI
    47	
    48		// set up m, g
    49		get_tls(CX)
    50		MOVQ	m_g0(R13), DI
    51		MOVQ	R13, g_m(DI)
    52		MOVQ	DI, g(CX)
    53	
    54		CALL	runtime·stackcheck(SB)
    55		CALL	runtime·mstart(SB)
    56	
    57		MOVQ 0, AX			// crash (not reached)
    58	
    59	// Exit the entire program (like C exit)
    60	TEXT runtime·exit(SB),NOSPLIT,$-8
    61		MOVL	code+0(FP), DI		// arg 1 exit status
    62		MOVL	$1, AX
    63		SYSCALL
    64		MOVL	$0xf1, 0xf1  // crash
    65		RET
    66	
    67	TEXT runtime·exit1(SB),NOSPLIT,$-8
    68		MOVL	code+0(FP), DI		// arg 1 exit status
    69		MOVL	$431, AX
    70		SYSCALL
    71		MOVL	$0xf1, 0xf1  // crash
    72		RET
    73	
    74	TEXT runtime·open(SB),NOSPLIT,$-8
    75		MOVQ	name+0(FP), DI		// arg 1 pathname
    76		MOVL	mode+8(FP), SI		// arg 2 flags
    77		MOVL	perm+12(FP), DX		// arg 3 mode
    78		MOVL	$5, AX
    79		SYSCALL
    80		JCC	2(PC)
    81		MOVL	$-1, AX
    82		MOVL	AX, ret+16(FP)
    83		RET
    84	
    85	TEXT runtime·closefd(SB),NOSPLIT,$-8
    86		MOVL	fd+0(FP), DI		// arg 1 fd
    87		MOVL	$6, AX
    88		SYSCALL
    89		JCC	2(PC)
    90		MOVL	$-1, AX
    91		MOVL	AX, ret+8(FP)
    92		RET
    93	
    94	TEXT runtime·read(SB),NOSPLIT,$-8
    95		MOVL	fd+0(FP), DI		// arg 1 fd
    96		MOVQ	p+8(FP), SI		// arg 2 buf
    97		MOVL	n+16(FP), DX		// arg 3 count
    98		MOVL	$3, AX
    99		SYSCALL
   100		JCC	2(PC)
   101		MOVL	$-1, AX
   102		MOVL	AX, ret+24(FP)
   103		RET
   104	
   105	TEXT runtime·write(SB),NOSPLIT,$-8
   106		MOVQ	fd+0(FP), DI		// arg 1 fd
   107		MOVQ	p+8(FP), SI		// arg 2 buf
   108		MOVL	n+16(FP), DX		// arg 3 count
   109		MOVL	$4, AX
   110		SYSCALL
   111		JCC	2(PC)
   112		MOVL	$-1, AX
   113		MOVL	AX, ret+24(FP)
   114		RET
   115	
   116	TEXT runtime·getrlimit(SB),NOSPLIT,$-8
   117		MOVL	kind+0(FP), DI
   118		MOVQ	limit+8(FP), SI
   119		MOVL	$194, AX
   120		SYSCALL
   121		MOVL	AX, ret+16(FP)
   122		RET
   123	
   124	TEXT runtime·raise(SB),NOSPLIT,$16
   125		MOVL	$496, AX	// lwp_gettid
   126		SYSCALL
   127		MOVQ	$-1, DI		// arg 1 - pid
   128		MOVQ	AX, SI		// arg 2 - tid
   129		MOVL	sig+0(FP), DX	// arg 3 - signum
   130		MOVL	$497, AX	// lwp_kill
   131		SYSCALL
   132		RET
   133	
   134	TEXT runtime·raiseproc(SB),NOSPLIT,$0
   135		MOVL	$20, AX		// getpid
   136		SYSCALL
   137		MOVQ	AX, DI		// arg 1 - pid
   138		MOVL	sig+0(FP), SI	// arg 2 - signum
   139		MOVL	$37, AX		// kill
   140		SYSCALL
   141		RET
   142	
   143	TEXT runtime·setitimer(SB), NOSPLIT, $-8
   144		MOVL	mode+0(FP), DI
   145		MOVQ	new+8(FP), SI
   146		MOVQ	old+16(FP), DX
   147		MOVL	$83, AX
   148		SYSCALL
   149		RET
   150	
   151	// func walltime() (sec int64, nsec int32)
   152	TEXT runtime·walltime(SB), NOSPLIT, $32
   153		MOVL	$232, AX // clock_gettime
   154		MOVQ	$0, DI  	// CLOCK_REALTIME
   155		LEAQ	8(SP), SI
   156		SYSCALL
   157		MOVQ	8(SP), AX	// sec
   158		MOVQ	16(SP), DX	// nsec
   159	
   160		// sec is in AX, nsec in DX
   161		MOVQ	AX, sec+0(FP)
   162		MOVL	DX, nsec+8(FP)
   163		RET
   164	
   165	TEXT runtime·nanotime(SB), NOSPLIT, $32
   166		MOVL	$232, AX
   167		MOVQ	$4, DI  	// CLOCK_MONOTONIC
   168		LEAQ	8(SP), SI
   169		SYSCALL
   170		MOVQ	8(SP), AX	// sec
   171		MOVQ	16(SP), DX	// nsec
   172	
   173		// sec is in AX, nsec in DX
   174		// return nsec in AX
   175		IMULQ	$1000000000, AX
   176		ADDQ	DX, AX
   177		MOVQ	AX, ret+0(FP)
   178		RET
   179	
   180	TEXT runtime·sigaction(SB),NOSPLIT,$-8
   181		MOVL	sig+0(FP), DI		// arg 1 sig
   182		MOVQ	new+8(FP), SI		// arg 2 act
   183		MOVQ	old+16(FP), DX		// arg 3 oact
   184		MOVL	$342, AX
   185		SYSCALL
   186		JCC	2(PC)
   187		MOVL	$0xf1, 0xf1  // crash
   188		RET
   189	
   190	TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
   191		MOVQ	fn+0(FP),    AX
   192		MOVL	sig+8(FP),   DI
   193		MOVQ	info+16(FP), SI
   194		MOVQ	ctx+24(FP),  DX
   195		PUSHQ	BP
   196		MOVQ	SP, BP
   197		ANDQ	$~15, SP     // alignment for x86_64 ABI
   198		CALL	AX
   199		MOVQ	BP, SP
   200		POPQ	BP
   201		RET
   202	
   203	TEXT runtime·sigtramp(SB),NOSPLIT,$72
   204		// Save callee-saved C registers, since the caller may be a C signal handler.
   205		MOVQ	BX,  bx-8(SP)
   206		MOVQ	BP,  bp-16(SP)  // save in case GOEXPERIMENT=noframepointer is set
   207		MOVQ	R12, r12-24(SP)
   208		MOVQ	R13, r13-32(SP)
   209		MOVQ	R14, r14-40(SP)
   210		MOVQ	R15, r15-48(SP)
   211		// We don't save mxcsr or the x87 control word because sigtrampgo doesn't
   212		// modify them.
   213	
   214		MOVQ	DX, ctx-56(SP)
   215		MOVQ	SI, info-64(SP)
   216		MOVQ	DI, signum-72(SP)
   217		CALL	runtime·sigtrampgo(SB)
   218	
   219		MOVQ	r15-48(SP), R15
   220		MOVQ	r14-40(SP), R14
   221		MOVQ	r13-32(SP), R13
   222		MOVQ	r12-24(SP), R12
   223		MOVQ	bp-16(SP),  BP
   224		MOVQ	bx-8(SP),   BX
   225		RET
   226	
   227	TEXT runtime·mmap(SB),NOSPLIT,$0
   228		MOVQ	addr+0(FP), DI		// arg 1 - addr
   229		MOVQ	n+8(FP), SI		// arg 2 - len
   230		MOVL	prot+16(FP), DX		// arg 3 - prot
   231		MOVL	flags+20(FP), R10		// arg 4 - flags
   232		MOVL	fd+24(FP), R8		// arg 5 - fd
   233		MOVL	off+28(FP), R9
   234		SUBQ	$16, SP
   235		MOVQ	R9, 8(SP)		// arg 7 - offset (passed on stack)
   236		MOVQ	$0, R9			// arg 6 - pad
   237		MOVL	$197, AX
   238		SYSCALL
   239		ADDQ	$16, SP
   240		MOVQ	AX, ret+32(FP)
   241		RET
   242	
   243	TEXT runtime·munmap(SB),NOSPLIT,$0
   244		MOVQ	addr+0(FP), DI		// arg 1 addr
   245		MOVQ	n+8(FP), SI		// arg 2 len
   246		MOVL	$73, AX
   247		SYSCALL
   248		JCC	2(PC)
   249		MOVL	$0xf1, 0xf1  // crash
   250		RET
   251	
   252	TEXT runtime·madvise(SB),NOSPLIT,$0
   253		MOVQ	addr+0(FP), DI
   254		MOVQ	n+8(FP), SI
   255		MOVL	flags+16(FP), DX
   256		MOVQ	$75, AX	// madvise
   257		SYSCALL
   258		// ignore failure - maybe pages are locked
   259		RET
   260		
   261	TEXT runtime·sigaltstack(SB),NOSPLIT,$-8
   262		MOVQ	new+0(FP), DI
   263		MOVQ	old+8(FP), SI
   264		MOVQ	$53, AX
   265		SYSCALL
   266		JCC	2(PC)
   267		MOVL	$0xf1, 0xf1  // crash
   268		RET
   269	
   270	TEXT runtime·usleep(SB),NOSPLIT,$16
   271		MOVL	$0, DX
   272		MOVL	usec+0(FP), AX
   273		MOVL	$1000000, CX
   274		DIVL	CX
   275		MOVQ	AX, 0(SP)		// tv_sec
   276		MOVL	$1000, AX
   277		MULL	DX
   278		MOVQ	AX, 8(SP)		// tv_nsec
   279	
   280		MOVQ	SP, DI			// arg 1 - rqtp
   281		MOVQ	$0, SI			// arg 2 - rmtp
   282		MOVL	$240, AX		// sys_nanosleep
   283		SYSCALL
   284		RET
   285	
   286	// set tls base to DI
   287	TEXT runtime·settls(SB),NOSPLIT,$16
   288		ADDQ	$8, DI	// adjust for ELF: wants to use -8(FS) for g
   289		MOVQ	DI, 0(SP)
   290		MOVQ	$16, 8(SP)
   291		MOVQ	$0, DI			// arg 1 - which
   292		MOVQ	SP, SI			// arg 2 - tls_info
   293		MOVQ	$16, DX			// arg 3 - infosize
   294		MOVQ	$472, AX		// set_tls_area
   295		SYSCALL
   296		JCC	2(PC)
   297		MOVL	$0xf1, 0xf1  // crash
   298		RET
   299	
   300	TEXT runtime·sysctl(SB),NOSPLIT,$0
   301		MOVQ	mib+0(FP), DI		// arg 1 - name
   302		MOVL	miblen+8(FP), SI		// arg 2 - namelen
   303		MOVQ	out+16(FP), DX		// arg 3 - oldp
   304		MOVQ	size+24(FP), R10		// arg 4 - oldlenp
   305		MOVQ	dst+32(FP), R8		// arg 5 - newp
   306		MOVQ	ndst+40(FP), R9		// arg 6 - newlen
   307		MOVQ	$202, AX		// sys___sysctl
   308		SYSCALL
   309		JCC 4(PC)
   310		NEGQ	AX
   311		MOVL	AX, ret+48(FP)
   312		RET
   313		MOVL	$0, AX
   314		MOVL	AX, ret+48(FP)
   315		RET
   316	
   317	TEXT runtime·osyield(SB),NOSPLIT,$-4
   318		MOVL	$331, AX		// sys_sched_yield
   319		SYSCALL
   320		RET
   321	
   322	TEXT runtime·sigprocmask(SB),NOSPLIT,$0
   323		MOVL	how+0(FP), DI		// arg 1 - how
   324		MOVQ	new+8(FP), SI		// arg 2 - set
   325		MOVQ	old+16(FP), DX		// arg 3 - oset
   326		MOVL	$340, AX		// sys_sigprocmask
   327		SYSCALL
   328		JAE	2(PC)
   329		MOVL	$0xf1, 0xf1  // crash
   330		RET
   331	
   332	// int32 runtime·kqueue(void);
   333	TEXT runtime·kqueue(SB),NOSPLIT,$0
   334		MOVQ	$0, DI
   335		MOVQ	$0, SI
   336		MOVQ	$0, DX
   337		MOVL	$362, AX
   338		SYSCALL
   339		JCC	2(PC)
   340		NEGQ	AX
   341		MOVL	AX, ret+0(FP)
   342		RET
   343	
   344	// int32 runtime·kevent(int kq, Kevent *changelist, int nchanges, Kevent *eventlist, int nevents, Timespec *timeout);
   345	TEXT runtime·kevent(SB),NOSPLIT,$0
   346		MOVL	kq+0(FP), DI
   347		MOVQ	ch+8(FP), SI
   348		MOVL	nch+16(FP), DX
   349		MOVQ	ev+24(FP), R10
   350		MOVL	nev+32(FP), R8
   351		MOVQ	ts+40(FP), R9
   352		MOVL	$363, AX
   353		SYSCALL
   354		JCC	2(PC)
   355		NEGQ	AX
   356		MOVL	AX, ret+48(FP)
   357		RET
   358	
   359	// void runtime·closeonexec(int32 fd);
   360	TEXT runtime·closeonexec(SB),NOSPLIT,$0
   361		MOVL	fd+0(FP), DI	// fd
   362		MOVQ	$2, SI		// F_SETFD
   363		MOVQ	$1, DX		// FD_CLOEXEC
   364		MOVL	$92, AX		// fcntl
   365		SYSCALL
   366		RET

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