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Diffstat (limited to 'src/runtime/sys_openbsd_amd64.s')
-rw-r--r-- | src/runtime/sys_openbsd_amd64.s | 350 |
1 files changed, 350 insertions, 0 deletions
diff --git a/src/runtime/sys_openbsd_amd64.s b/src/runtime/sys_openbsd_amd64.s new file mode 100644 index 000000000..4e9db2390 --- /dev/null +++ b/src/runtime/sys_openbsd_amd64.s @@ -0,0 +1,350 @@ +// 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, OpenBSD +// /usr/src/sys/kern/syscalls.master for syscall numbers. +// + +#include "zasm_GOOS_GOARCH.h" +#include "textflag.h" + +#define CLOCK_MONOTONIC $3 + +// int32 tfork(void *param, uintptr psize, M *mp, G *gp, void (*fn)(void)); +TEXT runtime·tfork(SB),NOSPLIT,$32 + + // Copy mp, gp and fn off parent stack for use by child. + MOVQ mm+16(FP), R8 + MOVQ gg+24(FP), R9 + MOVQ fn+32(FP), R12 + + MOVQ param+0(FP), DI + MOVQ psize+8(FP), SI + MOVL $8, AX // sys___tfork + SYSCALL + + // Return if tfork syscall failed. + JCC 4(PC) + NEGQ AX + MOVL AX, ret+40(FP) + RET + + // In parent, return. + CMPL AX, $0 + JEQ 3(PC) + MOVL AX, ret+40(FP) + RET + + // Set FS to point at m->tls. + LEAQ m_tls(R8), DI + CALL runtime·settls(SB) + + // In child, set up new stack. + get_tls(CX) + MOVQ R8, g_m(R9) + MOVQ R9, g(CX) + CALL runtime·stackcheck(SB) + + // Call fn + CALL R12 + + // It shouldn't return. If it does, exit + MOVQ $0, DI // arg 1 - notdead + MOVL $302, AX // sys___threxit + SYSCALL + JMP -3(PC) // keep exiting + +TEXT runtime·osyield(SB),NOSPLIT,$0 + MOVL $298, AX // sys_sched_yield + SYSCALL + RET + +TEXT runtime·thrsleep(SB),NOSPLIT,$0 + MOVQ ident+0(FP), DI // arg 1 - ident + MOVL clock_id+8(FP), SI // arg 2 - clock_id + MOVQ tsp+16(FP), DX // arg 3 - tp + MOVQ lock+24(FP), R10 // arg 4 - lock + MOVQ abort+32(FP), R8 // arg 5 - abort + MOVL $94, AX // sys___thrsleep + SYSCALL + MOVL AX, ret+40(FP) + RET + +TEXT runtime·thrwakeup(SB),NOSPLIT,$0 + MOVQ ident+0(FP), DI // arg 1 - ident + MOVL n+8(FP), SI // arg 2 - n + MOVL $301, AX // sys___thrwakeup + SYSCALL + MOVL AX, ret+16(FP) + RET + +// Exit the entire program (like C exit) +TEXT runtime·exit(SB),NOSPLIT,$-8 + MOVL code+0(FP), DI // arg 1 - exit status + MOVL $1, AX // sys_exit + SYSCALL + MOVL $0xf1, 0xf1 // crash + RET + +TEXT runtime·exit1(SB),NOSPLIT,$-8 + MOVQ $0, DI // arg 1 - notdead + MOVL $302, AX // sys___threxit + SYSCALL + MOVL $0xf1, 0xf1 // crash + RET + +TEXT runtime·open(SB),NOSPLIT,$-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 $5, AX + SYSCALL + MOVL AX, ret+16(FP) + RET + +TEXT runtime·close(SB),NOSPLIT,$-8 + MOVL fd+0(FP), DI // arg 1 fd + MOVL $6, AX + SYSCALL + MOVL AX, ret+8(FP) + RET + +TEXT runtime·read(SB),NOSPLIT,$-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 $3, AX + SYSCALL + MOVL AX, ret+24(FP) + RET + +TEXT runtime·write(SB),NOSPLIT,$-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 $4, AX // sys_write + SYSCALL + 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 $91, AX // sys_nanosleep + SYSCALL + RET + +TEXT runtime·raise(SB),NOSPLIT,$16 + MOVL $299, AX // sys_getthrid + SYSCALL + MOVQ AX, DI // arg 1 - pid + MOVL sig+0(FP), SI // arg 2 - signum + MOVL $37, AX // sys_kill + SYSCALL + RET + +TEXT runtime·setitimer(SB),NOSPLIT,$-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 $69, AX // sys_setitimer + SYSCALL + RET + +// func now() (sec int64, nsec int32) +TEXT time·now(SB), NOSPLIT, $32 + MOVQ $0, DI // arg 1 - clock_id + LEAQ 8(SP), SI // arg 2 - tp + MOVL $87, AX // sys_clock_gettime + 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·nanotime(SB),NOSPLIT,$24 + MOVQ CLOCK_MONOTONIC, DI // arg 1 - clock_id + LEAQ 8(SP), SI // arg 2 - tp + MOVL $87, AX // sys_clock_gettime + SYSCALL + MOVQ 8(SP), AX // sec + MOVQ 16(SP), DX // nsec + + // sec is in AX, nsec in DX + // return nsec in AX + IMULQ $1000000000, AX + ADDQ DX, AX + MOVQ AX, ret+0(FP) + RET + +TEXT runtime·sigaction(SB),NOSPLIT,$-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 + MOVL $46, AX + SYSCALL + JCC 2(PC) + MOVL $0xf1, 0xf1 // crash + RET + +TEXT runtime·sigprocmask(SB),NOSPLIT,$0 + MOVL mode+0(FP), DI // arg 1 - how + MOVL new+4(FP), SI // arg 2 - set + MOVL $48, AX // sys_sigprocmask + SYSCALL + JCC 2(PC) + MOVL $0xf1, 0xf1 // crash + MOVL AX, ret+8(FP) + RET + +TEXT runtime·sigtramp(SB),NOSPLIT,$64 + get_tls(BX) + + // check that g exists + MOVQ g(BX), R10 + CMPQ R10, $0 + JNE 5(PC) + MOVQ DI, 0(SP) + MOVQ $runtime·badsignal(SB), AX + CALL AX + RET + + // save g + MOVQ R10, 40(SP) + + // g = m->signal + MOVQ g_m(R10), BP + MOVQ m_gsignal(BP), BP + MOVQ BP, g(BX) + + MOVQ DI, 0(SP) + MOVQ SI, 8(SP) + MOVQ DX, 16(SP) + MOVQ R10, 24(SP) + + CALL runtime·sighandler(SB) + + // restore g + get_tls(BX) + MOVQ 40(SP), R10 + MOVQ R10, g(BX) + 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 $197, AX + SYSCALL + ADDQ $16, SP + MOVQ AX, ret+32(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 $73, AX // sys_munmap + 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 $75, AX // sys_madvise + SYSCALL + // ignore failure - maybe pages are locked + RET + +TEXT runtime·sigaltstack(SB),NOSPLIT,$-8 + MOVQ new+8(SP), DI // arg 1 - nss + MOVQ old+16(SP), SI // arg 2 - oss + MOVQ $288, AX // sys_sigaltstack + SYSCALL + JCC 2(PC) + MOVL $0xf1, 0xf1 // crash + RET + +// set tls base to DI +TEXT runtime·settls(SB),NOSPLIT,$0 + // adjust for ELF: wants to use -16(FS) and -8(FS) for g and m + ADDQ $16, DI + MOVQ $329, AX // sys___settcb + 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 $202, AX // sys___sysctl + 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 + MOVQ $0, SI + MOVQ $0, DX + MOVL $269, 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 fd+0(FP), DI + MOVQ ev1+8(FP), SI + MOVL nev1+16(FP), DX + MOVQ ev2+24(FP), R10 + MOVL nev2+32(FP), R8 + MOVQ ts+40(FP), R9 + MOVL $72, 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 $2, SI // F_SETFD + MOVQ $1, DX // FD_CLOEXEC + MOVL $92, AX // fcntl + SYSCALL + RET |