%PDF-
%PDF-
Mini Shell
Mini Shell
// 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, NetBSD
// /usr/src/sys/kern/syscalls.master for syscall numbers.
//
#include "go_asm.h"
#include "go_tls.h"
#include "textflag.h"
#include "cgo/abi_amd64.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
// int32 lwp_create(void *context, uintptr flags, void *lwpid)
TEXT runtime·lwp_create(SB),NOSPLIT,$0
MOVQ ctxt+0(FP), DI
MOVQ flags+8(FP), SI
MOVQ lwpid+16(FP), DX
MOVL $SYS__lwp_create, AX
SYSCALL
JCC 2(PC)
NEGQ AX
MOVL AX, ret+24(FP)
RET
TEXT runtime·lwp_tramp(SB),NOSPLIT,$0
// Set FS to point at m->tls.
LEAQ m_tls(R8), DI
CALL runtime·settls(SB)
// Set up new stack.
get_tls(CX)
MOVQ R8, g_m(R9)
MOVQ R9, g(CX)
CALL runtime·stackcheck(SB)
// Call fn. This is an ABI0 PC.
CALL R12
// It shouldn't return. If it does, exit.
MOVL $SYS__lwp_exit, AX
SYSCALL
JMP -3(PC) // keep exiting
TEXT ·netbsdMstart(SB),NOSPLIT|TOPFRAME,$0
CALL ·netbsdMstart0(SB)
RET // not reached
TEXT runtime·osyield(SB),NOSPLIT,$0
MOVL $SYS_sched_yield, AX
SYSCALL
RET
TEXT runtime·lwp_park(SB),NOSPLIT,$0
MOVL clockid+0(FP), DI // arg 1 - clockid
MOVL flags+4(FP), SI // arg 2 - flags
MOVQ ts+8(FP), DX // arg 3 - ts
MOVL unpark+16(FP), R10 // arg 4 - unpark
MOVQ hint+24(FP), R8 // arg 5 - hint
MOVQ unparkhint+32(FP), R9 // arg 6 - unparkhint
MOVL $SYS____lwp_park60, AX
SYSCALL
MOVL AX, ret+40(FP)
RET
TEXT runtime·lwp_unpark(SB),NOSPLIT,$0
MOVL lwp+0(FP), DI // arg 1 - lwp
MOVQ hint+8(FP), SI // arg 2 - hint
MOVL $SYS__lwp_unpark, AX
SYSCALL
MOVL AX, ret+16(FP)
RET
TEXT runtime·lwp_self(SB),NOSPLIT,$0
MOVL $SYS__lwp_self, AX
SYSCALL
MOVL AX, ret+0(FP)
RET
// Exit the entire program (like C exit)
TEXT runtime·exit(SB),NOSPLIT,$-8
MOVL code+0(FP), DI // arg 1 - exit status
MOVL $SYS_exit, AX
SYSCALL
MOVL $0xf1, 0xf1 // crash
RET
// func exitThread(wait *uint32)
TEXT runtime·exitThread(SB),NOSPLIT,$0-8
MOVQ wait+0(FP), AX
// We're done using the stack.
MOVL $0, (AX)
MOVL $SYS__lwp_exit, AX
SYSCALL
MOVL $0xf1, 0xf1 // crash
JMP 0(PC)
TEXT runtime·open(SB),NOSPLIT,$-8
MOVQ name+0(FP), DI // arg 1 pathname
MOVL mode+8(FP), SI // arg 2 flags
MOVL perm+12(FP), DX // arg 3 mode
MOVL $SYS_open, AX
SYSCALL
JCC 2(PC)
MOVL $-1, AX
MOVL AX, ret+16(FP)
RET
TEXT runtime·closefd(SB),NOSPLIT,$-8
MOVL fd+0(FP), DI // arg 1 fd
MOVL $SYS_close, AX
SYSCALL
JCC 2(PC)
MOVL $-1, AX
MOVL AX, ret+8(FP)
RET
TEXT runtime·read(SB),NOSPLIT,$-8
MOVL fd+0(FP), DI // arg 1 fd
MOVQ p+8(FP), SI // arg 2 buf
MOVL n+16(FP), DX // arg 3 count
MOVL $SYS_read, AX
SYSCALL
JCC 2(PC)
NEGQ AX // caller expects negative errno
MOVL AX, ret+24(FP)
RET
// func pipe() (r, w int32, errno int32)
TEXT runtime·pipe(SB),NOSPLIT,$0-12
MOVL $42, AX
SYSCALL
JCC pipeok
MOVL $-1, r+0(FP)
MOVL $-1, w+4(FP)
MOVL AX, errno+8(FP)
RET
pipeok:
MOVL AX, r+0(FP)
MOVL DX, w+4(FP)
MOVL $0, errno+8(FP)
RET
// func pipe2(flags int32) (r, w int32, errno int32)
TEXT runtime·pipe2(SB),NOSPLIT,$0-20
LEAQ r+8(FP), DI
MOVL flags+0(FP), SI
MOVL $453, AX
SYSCALL
MOVL AX, errno+16(FP)
RET
TEXT runtime·write1(SB),NOSPLIT,$-8
MOVQ fd+0(FP), DI // arg 1 - fd
MOVQ p+8(FP), SI // arg 2 - buf
MOVL n+16(FP), DX // arg 3 - nbyte
MOVL $SYS_write, AX
SYSCALL
JCC 2(PC)
NEGQ AX // caller expects negative errno
MOVL AX, ret+24(FP)
RET
TEXT runtime·usleep(SB),NOSPLIT,$16
MOVL $0, DX
MOVL usec+0(FP), AX
MOVL $1000000, CX
DIVL CX
MOVQ AX, 0(SP) // tv_sec
MOVL $1000, AX
MULL DX
MOVQ AX, 8(SP) // tv_nsec
MOVQ SP, DI // arg 1 - rqtp
MOVQ $0, SI // arg 2 - rmtp
MOVL $SYS___nanosleep50, AX
SYSCALL
RET
TEXT runtime·lwp_kill(SB),NOSPLIT,$0-16
MOVL tid+0(FP), DI // arg 1 - target
MOVQ sig+8(FP), SI // arg 2 - signo
MOVL $SYS__lwp_kill, AX
SYSCALL
RET
TEXT runtime·raiseproc(SB),NOSPLIT,$16
MOVL $SYS_getpid, AX
SYSCALL
MOVQ AX, DI // arg 1 - pid
MOVL sig+0(FP), SI // arg 2 - signo
MOVL $SYS_kill, AX
SYSCALL
RET
TEXT runtime·setitimer(SB),NOSPLIT,$-8
MOVL mode+0(FP), DI // arg 1 - which
MOVQ new+8(FP), SI // arg 2 - itv
MOVQ old+16(FP), DX // arg 3 - oitv
MOVL $SYS___setitimer50, AX
SYSCALL
RET
// func walltime() (sec int64, nsec int32)
TEXT runtime·walltime(SB), NOSPLIT, $32
MOVQ $CLOCK_REALTIME, DI // arg 1 - clock_id
LEAQ 8(SP), SI // arg 2 - tp
MOVL $SYS___clock_gettime50, AX
SYSCALL
MOVQ 8(SP), AX // sec
MOVQ 16(SP), DX // nsec
// sec is in AX, nsec in DX
MOVQ AX, sec+0(FP)
MOVL DX, nsec+8(FP)
RET
TEXT runtime·nanotime1(SB),NOSPLIT,$32
MOVQ $CLOCK_MONOTONIC, DI // arg 1 - clock_id
LEAQ 8(SP), SI // arg 2 - tp
MOVL $SYS___clock_gettime50, AX
SYSCALL
MOVQ 8(SP), AX // sec
MOVQ 16(SP), DX // nsec
// sec is in AX, nsec in DX
// return nsec in AX
IMULQ $1000000000, AX
ADDQ DX, AX
MOVQ AX, ret+0(FP)
RET
TEXT runtime·getcontext(SB),NOSPLIT,$-8
MOVQ ctxt+0(FP), DI // arg 1 - context
MOVL $SYS_getcontext, AX
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·sigprocmask(SB),NOSPLIT,$0
MOVL how+0(FP), DI // arg 1 - how
MOVQ new+8(FP), SI // arg 2 - set
MOVQ old+16(FP), DX // arg 3 - oset
MOVL $SYS___sigprocmask14, AX
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT sigreturn_tramp<>(SB),NOSPLIT,$-8
MOVQ R15, DI // Load address of ucontext
MOVQ $SYS_setcontext, AX
SYSCALL
MOVQ $-1, DI // Something failed...
MOVL $SYS_exit, AX
SYSCALL
TEXT runtime·sigaction(SB),NOSPLIT,$-8
MOVL sig+0(FP), DI // arg 1 - signum
MOVQ new+8(FP), SI // arg 2 - nsa
MOVQ old+16(FP), DX // arg 3 - osa
// arg 4 - tramp
LEAQ sigreturn_tramp<>(SB), R10
MOVQ $2, R8 // arg 5 - vers
MOVL $SYS___sigaction_sigtramp, AX
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
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
PUSHQ BP
MOVQ SP, BP
ANDQ $~15, SP // alignment for x86_64 ABI
CALL AX
MOVQ BP, SP
POPQ BP
RET
// Called using C ABI.
TEXT runtime·sigtramp(SB),NOSPLIT,$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
MOVQ DI, 0(SP) // sig
MOVQ SI, 8(SP) // info
MOVQ DX, 16(SP) // ctx
CALL ·sigtrampgo(SB)
ADJSP $-24
POP_REGS_HOST_TO_ABI0()
RET
TEXT runtime·mmap(SB),NOSPLIT,$0
MOVQ addr+0(FP), DI // arg 1 - addr
MOVQ n+8(FP), SI // arg 2 - len
MOVL prot+16(FP), DX // arg 3 - prot
MOVL flags+20(FP), R10 // arg 4 - flags
MOVL fd+24(FP), R8 // arg 5 - fd
MOVL off+28(FP), R9
SUBQ $16, SP
MOVQ R9, 8(SP) // arg 7 - offset (passed on stack)
MOVQ $0, R9 // arg 6 - pad
MOVL $SYS_mmap, AX
SYSCALL
JCC ok
ADDQ $16, SP
MOVQ $0, p+32(FP)
MOVQ AX, err+40(FP)
RET
ok:
ADDQ $16, SP
MOVQ AX, p+32(FP)
MOVQ $0, err+40(FP)
RET
TEXT runtime·munmap(SB),NOSPLIT,$0
MOVQ addr+0(FP), DI // arg 1 - addr
MOVQ n+8(FP), SI // arg 2 - len
MOVL $SYS_munmap, AX
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·madvise(SB),NOSPLIT,$0
MOVQ addr+0(FP), DI // arg 1 - addr
MOVQ n+8(FP), SI // arg 2 - len
MOVL flags+16(FP), DX // arg 3 - behav
MOVQ $SYS_madvise, AX
SYSCALL
JCC 2(PC)
MOVL $-1, AX
MOVL AX, ret+24(FP)
RET
TEXT runtime·sigaltstack(SB),NOSPLIT,$-8
MOVQ new+0(FP), DI // arg 1 - nss
MOVQ old+8(FP), SI // arg 2 - oss
MOVQ $SYS___sigaltstack14, AX
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
// set tls base to DI
TEXT runtime·settls(SB),NOSPLIT,$8
// adjust for ELF: wants to use -8(FS) for g
ADDQ $8, DI // arg 1 - ptr
MOVQ $SYS__lwp_setprivate, AX
SYSCALL
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·sysctl(SB),NOSPLIT,$0
MOVQ mib+0(FP), DI // arg 1 - name
MOVL miblen+8(FP), SI // arg 2 - namelen
MOVQ out+16(FP), DX // arg 3 - oldp
MOVQ size+24(FP), R10 // arg 4 - oldlenp
MOVQ dst+32(FP), R8 // arg 5 - newp
MOVQ ndst+40(FP), R9 // arg 6 - newlen
MOVQ $SYS___sysctl, AX
SYSCALL
JCC 4(PC)
NEGQ AX
MOVL AX, ret+48(FP)
RET
MOVL $0, AX
MOVL AX, ret+48(FP)
RET
// int32 runtime·kqueue(void)
TEXT runtime·kqueue(SB),NOSPLIT,$0
MOVQ $0, DI
MOVL $SYS_kqueue, AX
SYSCALL
JCC 2(PC)
NEGQ 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 kq+0(FP), DI
MOVQ ch+8(FP), SI
MOVL nch+16(FP), DX
MOVQ ev+24(FP), R10
MOVL nev+32(FP), R8
MOVQ ts+40(FP), R9
MOVL $SYS___kevent50, AX
SYSCALL
JCC 2(PC)
NEGQ AX
MOVL AX, ret+48(FP)
RET
// void runtime·closeonexec(int32 fd)
TEXT runtime·closeonexec(SB),NOSPLIT,$0
MOVL fd+0(FP), DI // fd
MOVQ $F_SETFD, SI
MOVQ $FD_CLOEXEC, DX
MOVL $SYS_fcntl, AX
SYSCALL
RET
// func runtime·setNonblock(int32 fd)
TEXT runtime·setNonblock(SB),NOSPLIT,$0-4
MOVL fd+0(FP), DI // fd
MOVQ $3, SI // F_GETFL
MOVQ $0, DX
MOVL $92, AX // fcntl
SYSCALL
MOVL fd+0(FP), DI // fd
MOVQ $4, SI // F_SETFL
MOVQ $4, DX // O_NONBLOCK
ORL AX, DX
MOVL $92, AX // fcntl
SYSCALL
RET
Zerion Mini Shell 1.0