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Text file src/runtime/sys_linux_mips64x.s

Documentation: runtime

     1	// Copyright 2015 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	// +build linux
     6	// +build mips64 mips64le
     7	
     8	//
     9	// System calls and other sys.stuff for mips64, Linux
    10	//
    11	
    12	#include "go_asm.h"
    13	#include "go_tls.h"
    14	#include "textflag.h"
    15	
    16	#define SYS_exit		5058
    17	#define SYS_read		5000
    18	#define SYS_write		5001
    19	#define SYS_open		5002
    20	#define SYS_close		5003
    21	#define SYS_getpid		5038
    22	#define SYS_kill		5060
    23	#define SYS_fcntl		5080
    24	#define SYS_gettimeofday	5094
    25	#define SYS_mmap		5009
    26	#define SYS_munmap		5011
    27	#define SYS_setitimer		5036
    28	#define SYS_clone		5055
    29	#define SYS_newselect		5022
    30	#define SYS_sched_yield		5023
    31	#define SYS_rt_sigreturn	5211
    32	#define SYS_rt_sigaction	5013
    33	#define SYS_rt_sigprocmask	5014
    34	#define SYS_sigaltstack		5129
    35	#define SYS_getrlimit		5095
    36	#define SYS_madvise		5027
    37	#define SYS_mincore		5026
    38	#define SYS_gettid		5178
    39	#define SYS_tkill		5192
    40	#define SYS_futex		5194
    41	#define SYS_sched_getaffinity	5196
    42	#define SYS_exit_group		5205
    43	#define SYS_epoll_create	5207
    44	#define SYS_epoll_ctl		5208
    45	#define SYS_epoll_wait		5209
    46	#define SYS_clock_gettime	5222
    47	#define SYS_epoll_create1	5285
    48	#define SYS_brk			5012
    49	
    50	TEXT runtime·exit(SB),NOSPLIT,$-8-4
    51		MOVW	code+0(FP), R4
    52		MOVV	$SYS_exit_group, R2
    53		SYSCALL
    54		RET
    55	
    56	// func exitThread(wait *uint32)
    57	TEXT runtime·exitThread(SB),NOSPLIT,$-8-8
    58		MOVV	wait+0(FP), R1
    59		// We're done using the stack.
    60		MOVW	$0, R2
    61		SYNC
    62		MOVW	R2, (R1)
    63		SYNC
    64		MOVW	$0, R4	// exit code
    65		MOVV	$SYS_exit, R2
    66		SYSCALL
    67		JMP	0(PC)
    68	
    69	TEXT runtime·open(SB),NOSPLIT,$-8-20
    70		MOVV	name+0(FP), R4
    71		MOVW	mode+8(FP), R5
    72		MOVW	perm+12(FP), R6
    73		MOVV	$SYS_open, R2
    74		SYSCALL
    75		BEQ	R7, 2(PC)
    76		MOVW	$-1, R2
    77		MOVW	R2, ret+16(FP)
    78		RET
    79	
    80	TEXT runtime·closefd(SB),NOSPLIT,$-8-12
    81		MOVW	fd+0(FP), R4
    82		MOVV	$SYS_close, R2
    83		SYSCALL
    84		BEQ	R7, 2(PC)
    85		MOVW	$-1, R2
    86		MOVW	R2, ret+8(FP)
    87		RET
    88	
    89	TEXT runtime·write(SB),NOSPLIT,$-8-28
    90		MOVV	fd+0(FP), R4
    91		MOVV	p+8(FP), R5
    92		MOVW	n+16(FP), R6
    93		MOVV	$SYS_write, R2
    94		SYSCALL
    95		BEQ	R7, 2(PC)
    96		MOVW	$-1, R2
    97		MOVW	R2, ret+24(FP)
    98		RET
    99	
   100	TEXT runtime·read(SB),NOSPLIT,$-8-28
   101		MOVW	fd+0(FP), R4
   102		MOVV	p+8(FP), R5
   103		MOVW	n+16(FP), R6
   104		MOVV	$SYS_read, R2
   105		SYSCALL
   106		BEQ	R7, 2(PC)
   107		MOVW	$-1, R2
   108		MOVW	R2, ret+24(FP)
   109		RET
   110	
   111	TEXT runtime·getrlimit(SB),NOSPLIT,$-8-20
   112		MOVW	kind+0(FP), R4	// _RLIMIT_AS = 6 on linux/mips
   113		MOVV	limit+8(FP), R5
   114		MOVV	$SYS_getrlimit, R2
   115		SYSCALL
   116		MOVW	R2, ret+16(FP)
   117		RET
   118	
   119	TEXT runtime·usleep(SB),NOSPLIT,$16-4
   120		MOVWU	usec+0(FP), R3
   121		MOVV	R3, R5
   122		MOVW	$1000000, R4
   123		DIVVU	R4, R3
   124		MOVV	LO, R3
   125		MOVV	R3, 8(R29)
   126		MULVU	R3, R4
   127		MOVV	LO, R4
   128		SUBVU	R4, R5
   129		MOVV	R5, 16(R29)
   130	
   131		// select(0, 0, 0, 0, &tv)
   132		MOVW	$0, R4
   133		MOVW	$0, R5
   134		MOVW	$0, R6
   135		MOVW	$0, R7
   136		ADDV	$8, R29, R8
   137		MOVV	$SYS_newselect, R2
   138		SYSCALL
   139		RET
   140	
   141	TEXT runtime·gettid(SB),NOSPLIT,$0-4
   142		MOVV	$SYS_gettid, R2
   143		SYSCALL
   144		MOVW	R2, ret+0(FP)
   145		RET
   146	
   147	TEXT runtime·raise(SB),NOSPLIT,$-8
   148		MOVV	$SYS_gettid, R2
   149		SYSCALL
   150		MOVW	R2, R4	// arg 1 tid
   151		MOVW	sig+0(FP), R5	// arg 2
   152		MOVV	$SYS_tkill, R2
   153		SYSCALL
   154		RET
   155	
   156	TEXT runtime·raiseproc(SB),NOSPLIT,$-8
   157		MOVV	$SYS_getpid, R2
   158		SYSCALL
   159		MOVW	R2, R4	// arg 1 pid
   160		MOVW	sig+0(FP), R5	// arg 2
   161		MOVV	$SYS_kill, R2
   162		SYSCALL
   163		RET
   164	
   165	TEXT runtime·setitimer(SB),NOSPLIT,$-8-24
   166		MOVW	mode+0(FP), R4
   167		MOVV	new+8(FP), R5
   168		MOVV	old+16(FP), R6
   169		MOVV	$SYS_setitimer, R2
   170		SYSCALL
   171		RET
   172	
   173	TEXT runtime·mincore(SB),NOSPLIT,$-8-28
   174		MOVV	addr+0(FP), R4
   175		MOVV	n+8(FP), R5
   176		MOVV	dst+16(FP), R6
   177		MOVV	$SYS_mincore, R2
   178		SYSCALL
   179		SUBVU	R2, R0, R2	// caller expects negative errno
   180		MOVW	R2, ret+24(FP)
   181		RET
   182	
   183	// func walltime() (sec int64, nsec int32)
   184	TEXT runtime·walltime(SB),NOSPLIT,$16
   185		MOVW	$0, R4 // CLOCK_REALTIME
   186		MOVV	$0(R29), R5
   187		MOVV	$SYS_clock_gettime, R2
   188		SYSCALL
   189		MOVV	0(R29), R3	// sec
   190		MOVV	8(R29), R5	// nsec
   191		MOVV	R3, sec+0(FP)
   192		MOVW	R5, nsec+8(FP)
   193		RET
   194	
   195	TEXT runtime·nanotime(SB),NOSPLIT,$16
   196		MOVW	$1, R4 // CLOCK_MONOTONIC
   197		MOVV	$0(R29), R5
   198		MOVV	$SYS_clock_gettime, R2
   199		SYSCALL
   200		MOVV	0(R29), R3	// sec
   201		MOVV	8(R29), R5	// nsec
   202		// sec is in R3, nsec in R5
   203		// return nsec in R3
   204		MOVV	$1000000000, R4
   205		MULVU	R4, R3
   206		MOVV	LO, R3
   207		ADDVU	R5, R3
   208		MOVV	R3, ret+0(FP)
   209		RET
   210	
   211	TEXT runtime·rtsigprocmask(SB),NOSPLIT,$-8-28
   212		MOVW	how+0(FP), R4
   213		MOVV	new+8(FP), R5
   214		MOVV	old+16(FP), R6
   215		MOVW	size+24(FP), R7
   216		MOVV	$SYS_rt_sigprocmask, R2
   217		SYSCALL
   218		BEQ	R7, 2(PC)
   219		MOVV	R0, 0xf1(R0)	// crash
   220		RET
   221	
   222	TEXT runtime·rt_sigaction(SB),NOSPLIT,$-8-36
   223		MOVV	sig+0(FP), R4
   224		MOVV	new+8(FP), R5
   225		MOVV	old+16(FP), R6
   226		MOVV	size+24(FP), R7
   227		MOVV	$SYS_rt_sigaction, R2
   228		SYSCALL
   229		MOVW	R2, ret+32(FP)
   230		RET
   231	
   232	TEXT runtime·sigfwd(SB),NOSPLIT,$0-32
   233		MOVW	sig+8(FP), R4
   234		MOVV	info+16(FP), R5
   235		MOVV	ctx+24(FP), R6
   236		MOVV	fn+0(FP), R25
   237		JAL	(R25)
   238		RET
   239	
   240	TEXT runtime·sigtramp(SB),NOSPLIT,$64
   241		// initialize REGSB = PC&0xffffffff00000000
   242		BGEZAL	R0, 1(PC)
   243		SRLV	$32, R31, RSB
   244		SLLV	$32, RSB
   245	
   246		// this might be called in external code context,
   247		// where g is not set.
   248		MOVB	runtime·iscgo(SB), R1
   249		BEQ	R1, 2(PC)
   250		JAL	runtime·load_g(SB)
   251	
   252		MOVW	R4, 8(R29)
   253		MOVV	R5, 16(R29)
   254		MOVV	R6, 24(R29)
   255		MOVV	$runtime·sigtrampgo(SB), R1
   256		JAL	(R1)
   257		RET
   258	
   259	TEXT runtime·cgoSigtramp(SB),NOSPLIT,$0
   260		JMP	runtime·sigtramp(SB)
   261	
   262	TEXT runtime·mmap(SB),NOSPLIT,$-8
   263		MOVV	addr+0(FP), R4
   264		MOVV	n+8(FP), R5
   265		MOVW	prot+16(FP), R6
   266		MOVW	flags+20(FP), R7
   267		MOVW	fd+24(FP), R8
   268		MOVW	off+28(FP), R9
   269	
   270		MOVV	$SYS_mmap, R2
   271		SYSCALL
   272		BEQ	R7, ok
   273		MOVV	$0, p+32(FP)
   274		MOVV	R2, err+40(FP)
   275		RET
   276	ok:
   277		MOVV	R2, p+32(FP)
   278		MOVV	$0, err+40(FP)
   279		RET
   280	
   281	TEXT runtime·munmap(SB),NOSPLIT,$-8
   282		MOVV	addr+0(FP), R4
   283		MOVV	n+8(FP), R5
   284		MOVV	$SYS_munmap, R2
   285		SYSCALL
   286		BEQ	R7, 2(PC)
   287		MOVV	R0, 0xf3(R0)	// crash
   288		RET
   289	
   290	TEXT runtime·madvise(SB),NOSPLIT,$-8
   291		MOVV	addr+0(FP), R4
   292		MOVV	n+8(FP), R5
   293		MOVW	flags+16(FP), R6
   294		MOVV	$SYS_madvise, R2
   295		SYSCALL
   296		// ignore failure - maybe pages are locked
   297		RET
   298	
   299	// int64 futex(int32 *uaddr, int32 op, int32 val,
   300	//	struct timespec *timeout, int32 *uaddr2, int32 val2);
   301	TEXT runtime·futex(SB),NOSPLIT,$-8
   302		MOVV	addr+0(FP), R4
   303		MOVW	op+8(FP), R5
   304		MOVW	val+12(FP), R6
   305		MOVV	ts+16(FP), R7
   306		MOVV	addr2+24(FP), R8
   307		MOVW	val3+32(FP), R9
   308		MOVV	$SYS_futex, R2
   309		SYSCALL
   310		MOVW	R2, ret+40(FP)
   311		RET
   312	
   313	// int64 clone(int32 flags, void *stk, M *mp, G *gp, void (*fn)(void));
   314	TEXT runtime·clone(SB),NOSPLIT,$-8
   315		MOVW	flags+0(FP), R4
   316		MOVV	stk+8(FP), R5
   317	
   318		// Copy mp, gp, fn off parent stack for use by child.
   319		// Careful: Linux system call clobbers ???.
   320		MOVV	mp+16(FP), R16
   321		MOVV	gp+24(FP), R17
   322		MOVV	fn+32(FP), R18
   323	
   324		MOVV	R16, -8(R5)
   325		MOVV	R17, -16(R5)
   326		MOVV	R18, -24(R5)
   327		MOVV	$1234, R16
   328		MOVV	R16, -32(R5)
   329	
   330		MOVV	$SYS_clone, R2
   331		SYSCALL
   332	
   333		// In parent, return.
   334		BEQ	R2, 3(PC)
   335		MOVW	R2, ret+40(FP)
   336		RET
   337	
   338		// In child, on new stack.
   339		MOVV	-32(R29), R16
   340		MOVV	$1234, R1
   341		BEQ	R16, R1, 2(PC)
   342		MOVV	R0, 0(R0)
   343	
   344		// Initialize m->procid to Linux tid
   345		MOVV	$SYS_gettid, R2
   346		SYSCALL
   347	
   348		MOVV	-24(R29), R18		// fn
   349		MOVV	-16(R29), R17		// g
   350		MOVV	-8(R29), R16		// m
   351	
   352		BEQ	R16, nog
   353		BEQ	R17, nog
   354	
   355		MOVV	R2, m_procid(R16)
   356	
   357		// TODO: setup TLS.
   358	
   359		// In child, set up new stack
   360		MOVV	R16, g_m(R17)
   361		MOVV	R17, g
   362		//CALL	runtime·stackcheck(SB)
   363	
   364	nog:
   365		// Call fn
   366		JAL	(R18)
   367	
   368		// It shouldn't return.	 If it does, exit that thread.
   369		MOVW	$111, R4
   370		MOVV	$SYS_exit, R2
   371		SYSCALL
   372		JMP	-3(PC)	// keep exiting
   373	
   374	TEXT runtime·sigaltstack(SB),NOSPLIT,$-8
   375		MOVV	new+0(FP), R4
   376		MOVV	old+8(FP), R5
   377		MOVV	$SYS_sigaltstack, R2
   378		SYSCALL
   379		BEQ	R7, 2(PC)
   380		MOVV	R0, 0xf1(R0)	// crash
   381		RET
   382	
   383	TEXT runtime·osyield(SB),NOSPLIT,$-8
   384		MOVV	$SYS_sched_yield, R2
   385		SYSCALL
   386		RET
   387	
   388	TEXT runtime·sched_getaffinity(SB),NOSPLIT,$-8
   389		MOVV	pid+0(FP), R4
   390		MOVV	len+8(FP), R5
   391		MOVV	buf+16(FP), R6
   392		MOVV	$SYS_sched_getaffinity, R2
   393		SYSCALL
   394		MOVW	R2, ret+24(FP)
   395		RET
   396	
   397	// int32 runtime·epollcreate(int32 size);
   398	TEXT runtime·epollcreate(SB),NOSPLIT,$-8
   399		MOVW    size+0(FP), R4
   400		MOVV	$SYS_epoll_create, R2
   401		SYSCALL
   402		MOVW	R2, ret+8(FP)
   403		RET
   404	
   405	// int32 runtime·epollcreate1(int32 flags);
   406	TEXT runtime·epollcreate1(SB),NOSPLIT,$-8
   407		MOVW	flags+0(FP), R4
   408		MOVV	$SYS_epoll_create1, R2
   409		SYSCALL
   410		MOVW	R2, ret+8(FP)
   411		RET
   412	
   413	// func epollctl(epfd, op, fd int32, ev *epollEvent) int
   414	TEXT runtime·epollctl(SB),NOSPLIT,$-8
   415		MOVW	epfd+0(FP), R4
   416		MOVW	op+4(FP), R5
   417		MOVW	fd+8(FP), R6
   418		MOVV	ev+16(FP), R7
   419		MOVV	$SYS_epoll_ctl, R2
   420		SYSCALL
   421		MOVW	R2, ret+24(FP)
   422		RET
   423	
   424	// int32 runtime·epollwait(int32 epfd, EpollEvent *ev, int32 nev, int32 timeout);
   425	TEXT runtime·epollwait(SB),NOSPLIT,$-8
   426		MOVW	epfd+0(FP), R4
   427		MOVV	ev+8(FP), R5
   428		MOVW	nev+16(FP), R6
   429		MOVW	timeout+20(FP), R7
   430		MOVV	$SYS_epoll_wait, R2
   431		SYSCALL
   432		MOVW	R2, ret+24(FP)
   433		RET
   434	
   435	// void runtime·closeonexec(int32 fd);
   436	TEXT runtime·closeonexec(SB),NOSPLIT,$-8
   437		MOVW    fd+0(FP), R4  // fd
   438		MOVV    $2, R5  // F_SETFD
   439		MOVV    $1, R6  // FD_CLOEXEC
   440		MOVV	$SYS_fcntl, R2
   441		SYSCALL
   442		RET
   443	
   444	// func sbrk0() uintptr
   445	TEXT runtime·sbrk0(SB),NOSPLIT,$-8-8
   446		// Implemented as brk(NULL).
   447		MOVV	$0, R4
   448		MOVV	$SYS_brk, R2
   449		SYSCALL
   450		MOVV	R2, ret+0(FP)
   451		RET

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