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sys_netbsd_386.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 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 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_issetugid 305 #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 $0x80 JAE 2(PC) NEGL AX MOVL AX, ret+24(FP) RET // func fcntl(fd, cmd, arg int32) (int32, int32) TEXT runtime·fcntl(SB),NOSPLIT,$-4 MOVL $SYS_fcntl, AX INT $0x80 JAE noerr MOVL $-1, ret+12(FP) MOVL AX, errno+16(FP) RET noerr: MOVL AX, ret+12(FP) MOVL $0, errno+16(FP) RET // func issetugid() int32 TEXT runtime·issetugid(SB),NOSPLIT,$0 MOVL $SYS_issetugid, AX INT $0x80 MOVL AX, ret+0(FP) RET
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