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// 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 "zasm_GOOS_GOARCH.h"
#include "textflag.h"
// Exit the entire program (like C exit)
TEXT runtime·exit(SB),NOSPLIT,$-4
MOVL $1, AX
INT $0x80
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·exit1(SB),NOSPLIT,$-4
MOVL $310, AX // sys__lwp_exit
INT $0x80
JAE 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·open(SB),NOSPLIT,$-4
MOVL $5, AX
INT $0x80
MOVL AX, ret+12(FP)
RET
TEXT runtime·close(SB),NOSPLIT,$-4
MOVL $6, AX
INT $0x80
MOVL AX, ret+4(FP)
RET
TEXT runtime·read(SB),NOSPLIT,$-4
MOVL $3, AX
INT $0x80
MOVL AX, ret+12(FP)
RET
TEXT runtime·write(SB),NOSPLIT,$-4
MOVL $4, AX // sys_write
INT $0x80
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 $430, AX // sys_nanosleep
INT $0x80
RET
TEXT runtime·raise(SB),NOSPLIT,$12
MOVL $311, AX // sys__lwp_self
INT $0x80
MOVL $0, 0(SP)
MOVL AX, 4(SP) // arg 1 - target
MOVL sig+0(FP), AX
MOVL AX, 8(SP) // arg 2 - signo
MOVL $318, AX // sys__lwp_kill
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 $197, AX // sys_mmap
INT $0x80
MOVL AX, ret+24(FP)
RET
TEXT runtime·munmap(SB),NOSPLIT,$-4
MOVL $73, AX // sys_munmap
INT $0x80
JAE 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·madvise(SB),NOSPLIT,$-4
MOVL $75, AX // sys_madvise
INT $0x80
// ignore failure - maybe pages are locked
RET
TEXT runtime·setitimer(SB),NOSPLIT,$-4
MOVL $425, AX // sys_setitimer
INT $0x80
RET
// func now() (sec int64, nsec int32)
TEXT time·now(SB), NOSPLIT, $32
LEAL 12(SP), BX
MOVL $0, 4(SP) // arg 1 - clock_id
MOVL BX, 8(SP) // arg 2 - tp
MOVL $427, AX // sys_clock_gettime
INT $0x80
MOVL 12(SP), AX // sec - l32
MOVL AX, sec+0(FP)
MOVL 16(SP), AX // sec - h32
MOVL AX, sec+4(FP)
MOVL 20(SP), BX // nsec
MOVL BX, nsec+8(FP)
RET
// int64 nanotime(void) so really
// void nanotime(int64 *nsec)
TEXT runtime·nanotime(SB),NOSPLIT,$32
LEAL 12(SP), BX
MOVL $0, 4(SP) // arg 1 - clock_id
MOVL BX, 8(SP) // arg 2 - tp
MOVL $427, AX // sys_clock_gettime
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 $307, AX // sys_getcontext
INT $0x80
JAE 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·sigprocmask(SB),NOSPLIT,$-4
MOVL $293, AX // sys_sigprocmask
INT $0x80
JAE 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·sigreturn_tramp(SB),NOSPLIT,$0
LEAL 140(SP), AX // Load address of ucontext
MOVL AX, 4(SP)
MOVL $308, AX // sys_setcontext
INT $0x80
MOVL $-1, 4(SP) // Something failed...
MOVL $1, AX // sys_exit
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 runtime·sigreturn_tramp(SB), AX
STOSL // arg 4 - tramp
MOVL $2, AX
STOSL // arg 5 - vers
MOVL $340, AX // sys___sigaction_sigtramp
INT $0x80
JAE 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·sigtramp(SB),NOSPLIT,$44
get_tls(CX)
// check that g exists
MOVL g(CX), DI
CMPL DI, $0
JNE 6(PC)
MOVL signo+0(FP), BX
MOVL BX, 0(SP)
MOVL $runtime·badsignal(SB), AX
CALL AX
RET
// save g
MOVL DI, 20(SP)
// g = m->gsignal
MOVL g_m(DI), BX
MOVL m_gsignal(BX), BX
MOVL BX, g(CX)
// copy arguments for call to sighandler
MOVL signo+0(FP), BX
MOVL BX, 0(SP)
MOVL info+4(FP), BX
MOVL BX, 4(SP)
MOVL context+8(FP), BX
MOVL BX, 8(SP)
MOVL DI, 12(SP)
CALL runtime·sighandler(SB)
// restore g
get_tls(CX)
MOVL 20(SP), BX
MOVL BX, g(CX)
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 $309, AX // sys__lwp_create
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 runtime·settls(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
CALL runtime·exit1(SB)
MOVL $0x1234, 0x1005
RET
TEXT runtime·sigaltstack(SB),NOSPLIT,$-8
MOVL $281, AX // sys___sigaltstack14
MOVL new+4(SP), BX
MOVL old+8(SP), 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 16(SP), AX // tls0
MOVL AX, 0(SP)
CALL runtime·settls(SB)
RET
TEXT runtime·settls(SB),NOSPLIT,$16
// adjust for ELF: wants to use -8(GS) and -4(GS) for g and m
MOVL base+0(FP), CX
ADDL $8, CX
MOVL $0, 0(SP) // syscall gap
MOVL CX, 4(SP) // arg 1 - ptr
MOVL $317, AX // sys__lwp_setprivate
INT $0x80
JCC 2(PC)
MOVL $0xf1, 0xf1 // crash
RET
TEXT runtime·osyield(SB),NOSPLIT,$-4
MOVL $350, AX // sys_sched_yield
INT $0x80
RET
TEXT runtime·lwp_park(SB),NOSPLIT,$-4
MOVL $434, AX // sys__lwp_park
INT $0x80
MOVL AX, ret+16(FP)
RET
TEXT runtime·lwp_unpark(SB),NOSPLIT,$-4
MOVL $321, AX // sys__lwp_unpark
INT $0x80
MOVL AX, ret+8(FP)
RET
TEXT runtime·lwp_self(SB),NOSPLIT,$-4
MOVL $311, AX // sys__lwp_self
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 $202, AX // sys___sysctl
INT $0x80
JCC 3(PC)
NEGL AX
RET
MOVL $0, AX
RET
GLOBL runtime·tlsoffset(SB),NOPTR,$4
// int32 runtime·kqueue(void)
TEXT runtime·kqueue(SB),NOSPLIT,$0
MOVL $344, 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 $435, 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 $92, AX // fcntl
// 0(SP) is where the caller PC would be; kernel skips it
MOVL fd+0(FP), BX
MOVL BX, 4(SP) // fd
MOVL $2, 8(SP) // F_SETFD
MOVL $1, 12(SP) // FD_CLOEXEC
INT $0x80
JAE 2(PC)
NEGL AX
RET
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