1 files changed, 471 insertions, 0 deletions
diff --git a/src/runtime/sys_netbsd_386.s b/src/runtime/sys_netbsd_386.s
new file mode 100644
index 0000000..7be18c6
--- /dev/null
+++ b/src/runtime/sys_netbsd_386.s
@@ -0,0 +1,471 @@
+// 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 386, NetBSD
+// /usr/src/sys/kern/syscalls.master for syscall numbers.
+//
+
+#include "go_asm.h"
+#include "go_tls.h"
+#include "textflag.h"
+
+#define CLOCK_REALTIME		0
+#define CLOCK_MONOTONIC		3
+#define FD_CLOEXEC		1
+#define F_SETFD			2
+
+#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_munmap			73
+#define SYS_madvise			75
+#define SYS_fcntl			92
+#define SYS_mmap			197
+#define SYS___sysctl			202
+#define SYS___sigaltstack14		281
+#define SYS___sigprocmask14		293
+#define SYS_getcontext			307
+#define SYS_setcontext			308
+#define SYS__lwp_create			309
+#define SYS__lwp_exit			310
+#define SYS__lwp_self			311
+#define SYS__lwp_setprivate		317
+#define SYS__lwp_kill			318
+#define SYS__lwp_unpark			321
+#define SYS___sigaction_sigtramp	340
+#define SYS_kqueue			344
+#define SYS_sched_yield			350
+#define SYS___setitimer50		425
+#define SYS___clock_gettime50		427
+#define SYS___nanosleep50		430
+#define SYS___kevent50			435
+#define SYS____lwp_park60		478
+
+// Exit the entire program (like C exit)
+TEXT runtime·exit(SB),NOSPLIT,$-4
+	MOVL	$SYS_exit, AX
+	INT	$0x80
+	MOVL	$0xf1, 0xf1		// crash
+	RET
+
+// func exitThread(wait *atomic.Uint32)
+TEXT runtime·exitThread(SB),NOSPLIT,$0-4
+	MOVL	wait+0(FP), AX
+	// We're done using the stack.
+	MOVL	$0, (AX)
+	MOVL	$SYS__lwp_exit, AX
+	INT	$0x80
+	MOVL	$0xf1, 0xf1		// crash
+	JMP	0(PC)
+
+TEXT runtime·open(SB),NOSPLIT,$-4
+	MOVL	$SYS_open, AX
+	INT	$0x80
+	JAE	2(PC)
+	MOVL	$-1, AX
+	MOVL	AX, ret+12(FP)
+	RET
+
+TEXT runtime·closefd(SB),NOSPLIT,$-4
+	MOVL	$SYS_close, AX
+	INT	$0x80
+	JAE	2(PC)
+	MOVL	$-1, AX
+	MOVL	AX, ret+4(FP)
+	RET
+
+TEXT runtime·read(SB),NOSPLIT,$-4
+	MOVL	$SYS_read, AX
+	INT	$0x80
+	JAE	2(PC)
+	NEGL	AX			// caller expects negative errno
+	MOVL	AX, ret+12(FP)
+	RET
+
+// func pipe2(flags int32) (r, w int32, errno int32)
+TEXT runtime·pipe2(SB),NOSPLIT,$12-16
+	MOVL	$453, AX
+	LEAL	r+4(FP), BX
+	MOVL	BX, 4(SP)
+	MOVL	flags+0(FP), BX
+	MOVL	BX, 8(SP)
+	INT	$0x80
+	MOVL	AX, errno+12(FP)
+	RET
+
+TEXT runtime·write1(SB),NOSPLIT,$-4
+	MOVL	$SYS_write, AX
+	INT	$0x80
+	JAE	2(PC)
+	NEGL	AX			// caller expects negative errno
+	MOVL	AX, ret+12(FP)
+	RET
+
+TEXT runtime·usleep(SB),NOSPLIT,$24
+	MOVL	$0, DX
+	MOVL	usec+0(FP), AX
+	MOVL	$1000000, CX
+	DIVL	CX
+	MOVL	AX, 12(SP)		// tv_sec - l32
+	MOVL	$0, 16(SP)		// tv_sec - h32
+	MOVL	$1000, AX
+	MULL	DX
+	MOVL	AX, 20(SP)		// tv_nsec
+
+	MOVL	$0, 0(SP)
+	LEAL	12(SP), AX
+	MOVL	AX, 4(SP)		// arg 1 - rqtp
+	MOVL	$0, 8(SP)		// arg 2 - rmtp
+	MOVL	$SYS___nanosleep50, AX
+	INT	$0x80
+	RET
+
+TEXT runtime·lwp_kill(SB),NOSPLIT,$12-8
+	MOVL	$0, 0(SP)
+	MOVL	tid+0(FP), AX
+	MOVL	AX, 4(SP)		// arg 1 - target
+	MOVL	sig+4(FP), AX
+	MOVL	AX, 8(SP)		// arg 2 - signo
+	MOVL	$SYS__lwp_kill, AX
+	INT	$0x80
+	RET
+
+TEXT runtime·raiseproc(SB),NOSPLIT,$12
+	MOVL	$SYS_getpid, AX
+	INT	$0x80
+	MOVL	$0, 0(SP)
+	MOVL	AX, 4(SP)		// arg 1 - pid
+	MOVL	sig+0(FP), AX
+	MOVL	AX, 8(SP)		// arg 2 - signo
+	MOVL	$SYS_kill, AX
+	INT	$0x80
+	RET
+
+TEXT runtime·mmap(SB),NOSPLIT,$36
+	LEAL	addr+0(FP), SI
+	LEAL	4(SP), DI
+	CLD
+	MOVSL				// arg 1 - addr
+	MOVSL				// arg 2 - len
+	MOVSL				// arg 3 - prot
+	MOVSL				// arg 4 - flags
+	MOVSL				// arg 5 - fd
+	MOVL	$0, AX
+	STOSL				// arg 6 - pad
+	MOVSL				// arg 7 - offset
+	MOVL	$0, AX			// top 32 bits of file offset
+	STOSL
+	MOVL	$SYS_mmap, AX
+	INT	$0x80
+	JAE	ok
+	MOVL	$0, p+24(FP)
+	MOVL	AX, err+28(FP)
+	RET
+ok:
+	MOVL	AX, p+24(FP)
+	MOVL	$0, err+28(FP)
+	RET
+
+TEXT runtime·munmap(SB),NOSPLIT,$-4
+	MOVL	$SYS_munmap, AX
+	INT	$0x80
+	JAE	2(PC)
+	MOVL	$0xf1, 0xf1		// crash
+	RET
+
+TEXT runtime·madvise(SB),NOSPLIT,$-4
+	MOVL	$SYS_madvise, AX
+	INT	$0x80
+	JAE	2(PC)
+	MOVL	$-1, AX
+	MOVL	AX, ret+12(FP)
+	RET
+
+TEXT runtime·setitimer(SB),NOSPLIT,$-4
+	MOVL	$SYS___setitimer50, AX
+	INT	$0x80
+	RET
+
+// func walltime() (sec int64, nsec int32)
+TEXT runtime·walltime(SB), NOSPLIT, $32
+	LEAL	12(SP), BX
+	MOVL	$CLOCK_REALTIME, 4(SP)	// arg 1 - clock_id
+	MOVL	BX, 8(SP)		// arg 2 - tp
+	MOVL	$SYS___clock_gettime50, AX
+	INT	$0x80
+
+	MOVL	12(SP), AX		// sec - l32
+	MOVL	AX, sec_lo+0(FP)
+	MOVL	16(SP), AX		// sec - h32
+	MOVL	AX, sec_hi+4(FP)
+
+	MOVL	20(SP), BX		// nsec
+	MOVL	BX, nsec+8(FP)
+	RET
+
+// int64 nanotime1(void) so really
+// void nanotime1(int64 *nsec)
+TEXT runtime·nanotime1(SB),NOSPLIT,$32
+	LEAL	12(SP), BX
+	MOVL	$CLOCK_MONOTONIC, 4(SP)	// arg 1 - clock_id
+	MOVL	BX, 8(SP)		// arg 2 - tp
+	MOVL	$SYS___clock_gettime50, AX
+	INT	$0x80
+
+	MOVL	16(SP), CX		// sec - h32
+	IMULL	$1000000000, CX
+
+	MOVL	12(SP), AX		// sec - l32
+	MOVL	$1000000000, BX
+	MULL	BX			// result in dx:ax
+
+	MOVL	20(SP), BX		// nsec
+	ADDL	BX, AX
+	ADCL	CX, DX			// add high bits with carry
+
+	MOVL	AX, ret_lo+0(FP)
+	MOVL	DX, ret_hi+4(FP)
+	RET
+
+TEXT runtime·getcontext(SB),NOSPLIT,$-4
+	MOVL	$SYS_getcontext, AX
+	INT	$0x80
+	JAE	2(PC)
+	MOVL	$0xf1, 0xf1		// crash
+	RET
+
+TEXT runtime·sigprocmask(SB),NOSPLIT,$-4
+	MOVL	$SYS___sigprocmask14, AX
+	INT	$0x80
+	JAE	2(PC)
+	MOVL	$0xf1, 0xf1		// crash
+	RET
+
+TEXT sigreturn_tramp<>(SB),NOSPLIT,$0
+	LEAL	140(SP), AX		// Load address of ucontext
+	MOVL	AX, 4(SP)
+	MOVL	$SYS_setcontext, AX
+	INT	$0x80
+	MOVL	$-1, 4(SP)		// Something failed...
+	MOVL	$SYS_exit, AX
+	INT	$0x80
+
+TEXT runtime·sigaction(SB),NOSPLIT,$24
+	LEAL	sig+0(FP), SI
+	LEAL	4(SP), DI
+	CLD
+	MOVSL				// arg 1 - sig
+	MOVSL				// arg 2 - act
+	MOVSL				// arg 3 - oact
+	LEAL	sigreturn_tramp<>(SB), AX
+	STOSL				// arg 4 - tramp
+	MOVL	$2, AX
+	STOSL				// arg 5 - vers
+	MOVL	$SYS___sigaction_sigtramp, AX
+	INT	$0x80
+	JAE	2(PC)
+	MOVL	$0xf1, 0xf1		// crash
+	RET
+
+TEXT runtime·sigfwd(SB),NOSPLIT,$12-16
+	MOVL	fn+0(FP), AX
+	MOVL	sig+4(FP), BX
+	MOVL	info+8(FP), CX
+	MOVL	ctx+12(FP), DX
+	MOVL	SP, SI
+	SUBL	$32, SP
+	ANDL	$-15, SP	// align stack: handler might be a C function
+	MOVL	BX, 0(SP)
+	MOVL	CX, 4(SP)
+	MOVL	DX, 8(SP)
+	MOVL	SI, 12(SP)	// save SI: handler might be a Go function
+	CALL	AX
+	MOVL	12(SP), AX
+	MOVL	AX, SP
+	RET
+
+// Called by OS using C ABI.
+TEXT runtime·sigtramp(SB),NOSPLIT|TOPFRAME,$28
+	NOP	SP	// tell vet SP changed - stop checking offsets
+	// Save callee-saved C registers, since the caller may be a C signal handler.
+	MOVL	BX, bx-4(SP)
+	MOVL	BP, bp-8(SP)
+	MOVL	SI, si-12(SP)
+	MOVL	DI, di-16(SP)
+	// We don't save mxcsr or the x87 control word because sigtrampgo doesn't
+	// modify them.
+
+	MOVL	32(SP), BX // signo
+	MOVL	BX, 0(SP)
+	MOVL	36(SP), BX // info
+	MOVL	BX, 4(SP)
+	MOVL	40(SP), BX // context
+	MOVL	BX, 8(SP)
+	CALL	runtime·sigtrampgo(SB)
+
+	MOVL	di-16(SP), DI
+	MOVL	si-12(SP), SI
+	MOVL	bp-8(SP),  BP
+	MOVL	bx-4(SP),  BX
+	RET
+
+// int32 lwp_create(void *context, uintptr flags, void *lwpid);
+TEXT runtime·lwp_create(SB),NOSPLIT,$16
+	MOVL	$0, 0(SP)
+	MOVL	ctxt+0(FP), AX
+	MOVL	AX, 4(SP)		// arg 1 - context
+	MOVL	flags+4(FP), AX
+	MOVL	AX, 8(SP)		// arg 2 - flags
+	MOVL	lwpid+8(FP), AX
+	MOVL	AX, 12(SP)		// arg 3 - lwpid
+	MOVL	$SYS__lwp_create, AX
+	INT	$0x80
+	JCC	2(PC)
+	NEGL	AX
+	MOVL	AX, ret+12(FP)
+	RET
+
+TEXT runtime·lwp_tramp(SB),NOSPLIT,$0
+
+	// Set FS to point at m->tls
+	LEAL	m_tls(BX), BP
+	PUSHAL				// save registers
+	PUSHL	BP
+	CALL	lwp_setprivate<>(SB)
+	POPL	AX
+	POPAL
+
+	// Now segment is established. Initialize m, g.
+	get_tls(AX)
+	MOVL	DX, g(AX)
+	MOVL	BX, g_m(DX)
+
+	CALL	runtime·stackcheck(SB)	// smashes AX, CX
+	MOVL	0(DX), DX		// paranoia; check they are not nil
+	MOVL	0(BX), BX
+
+	// more paranoia; check that stack splitting code works
+	PUSHAL
+	CALL	runtime·emptyfunc(SB)
+	POPAL
+
+	// Call fn
+	CALL	SI
+
+	// fn should never return
+	MOVL	$0x1234, 0x1005
+	RET
+
+TEXT ·netbsdMstart(SB),NOSPLIT|TOPFRAME,$0
+	CALL	·netbsdMstart0(SB)
+	RET // not reached
+
+TEXT runtime·sigaltstack(SB),NOSPLIT,$-8
+	MOVL	$SYS___sigaltstack14, AX
+	MOVL	new+0(FP), BX
+	MOVL	old+4(FP), CX
+	INT	$0x80
+	CMPL	AX, $0xfffff001
+	JLS	2(PC)
+	INT	$3
+	RET
+
+TEXT runtime·setldt(SB),NOSPLIT,$8
+	// Under NetBSD we set the GS base instead of messing with the LDT.
+	MOVL	base+4(FP), AX
+	MOVL	AX, 0(SP)
+	CALL	lwp_setprivate<>(SB)
+	RET
+
+TEXT lwp_setprivate<>(SB),NOSPLIT,$16
+	// adjust for ELF: wants to use -4(GS) for g
+	MOVL	base+0(FP), CX
+	ADDL	$4, CX
+	MOVL	$0, 0(SP)		// syscall gap
+	MOVL	CX, 4(SP)		// arg 1 - ptr
+	MOVL	$SYS__lwp_setprivate, AX
+	INT	$0x80
+	JCC	2(PC)
+	MOVL	$0xf1, 0xf1		// crash
+	RET
+
+TEXT runtime·osyield(SB),NOSPLIT,$-4
+	MOVL	$SYS_sched_yield, AX
+	INT	$0x80
+	RET
+
+TEXT runtime·lwp_park(SB),NOSPLIT,$-4
+	MOVL	$SYS____lwp_park60, AX
+	INT	$0x80
+	MOVL	AX, ret+24(FP)
+	RET
+
+TEXT runtime·lwp_unpark(SB),NOSPLIT,$-4
+	MOVL	$SYS__lwp_unpark, AX
+	INT	$0x80
+	MOVL	AX, ret+8(FP)
+	RET
+
+TEXT runtime·lwp_self(SB),NOSPLIT,$-4
+	MOVL	$SYS__lwp_self, AX
+	INT	$0x80
+	MOVL	AX, ret+0(FP)
+	RET
+
+TEXT runtime·sysctl(SB),NOSPLIT,$28
+	LEAL	mib+0(FP), SI
+	LEAL	4(SP), DI
+	CLD
+	MOVSL				// arg 1 - name
+	MOVSL				// arg 2 - namelen
+	MOVSL				// arg 3 - oldp
+	MOVSL				// arg 4 - oldlenp
+	MOVSL				// arg 5 - newp
+	MOVSL				// arg 6 - newlen
+	MOVL	$SYS___sysctl, AX
+	INT	$0x80
+	JAE	4(PC)
+	NEGL	AX
+	MOVL	AX, ret+24(FP)
+	RET
+	MOVL	$0, AX
+	MOVL	AX, ret+24(FP)
+	RET
+
+GLOBL runtime·tlsoffset(SB),NOPTR,$4
+
+// int32 runtime·kqueue(void)
+TEXT runtime·kqueue(SB),NOSPLIT,$0
+	MOVL	$SYS_kqueue, AX
+	INT	$0x80
+	JAE	2(PC)
+	NEGL	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	$SYS___kevent50, AX
+	INT	$0x80
+	JAE	2(PC)
+	NEGL	AX
+	MOVL	AX, ret+24(FP)
+	RET
+
+// int32 runtime·closeonexec(int32 fd)
+TEXT runtime·closeonexec(SB),NOSPLIT,$32
+	MOVL	$SYS_fcntl, AX
+	// 0(SP) is where the caller PC would be; kernel skips it
+	MOVL	fd+0(FP), BX
+	MOVL	BX, 4(SP)	// fd
+	MOVL	$F_SETFD, 8(SP)
+	MOVL	$FD_CLOEXEC, 12(SP)
+	INT	$0x80
+	JAE	2(PC)
+	NEGL	AX
+	RET