diff options
Diffstat (limited to 'src/pkg/runtime/sys_freebsd_amd64.s')
-rw-r--r-- | src/pkg/runtime/sys_freebsd_amd64.s | 345 |
1 files changed, 0 insertions, 345 deletions
diff --git a/src/pkg/runtime/sys_freebsd_amd64.s b/src/pkg/runtime/sys_freebsd_amd64.s deleted file mode 100644 index 4c5b32504..000000000 --- a/src/pkg/runtime/sys_freebsd_amd64.s +++ /dev/null @@ -1,345 +0,0 @@ -// 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, FreeBSD -// /usr/src/sys/kern/syscalls.master for syscall numbers. -// - -#include "zasm_GOOS_GOARCH.h" -#include "../../cmd/ld/textflag.h" - -// FreeBSD 8, FreeBSD 9, and older versions that I have checked -// do not restore R10 on exit from a "restarted" system call -// if you use the SYSCALL instruction. This means that, for example, -// if a signal arrives while the wait4 system call is executing, -// the wait4 internally returns ERESTART, which makes the kernel -// back up the PC to execute the SYSCALL instruction a second time. -// However, since the kernel does not restore R10, the fourth -// argument to the system call has been lost. (FreeBSD 9 also fails -// to restore the fifth and sixth arguments, R8 and R9, although -// some earlier versions did restore those correctly.) -// The broken code is in fast_syscall in FreeBSD's amd64/amd64/exception.S. -// It restores only DI, SI, DX, AX, and RFLAGS on system call return. -// http://fxr.watson.org/fxr/source/amd64/amd64/exception.S?v=FREEBSD91#L399 -// -// The INT $0x80 system call path (int0x80_syscall in FreeBSD's -// amd64/ia32/ia32_exception.S) does not have this problem, -// but it expects the third argument in R10. Instead of rewriting -// all the assembly in this file, #define SYSCALL to a safe simulation -// using INT $0x80. -// -// INT $0x80 is a little slower than SYSCALL, but correctness wins. -// -// See golang.org/issue/6372. -#define SYSCALL MOVQ R10, CX; INT $0x80 - -TEXT runtime·sys_umtx_op(SB),NOSPLIT,$0 - MOVQ 8(SP), DI - MOVL 16(SP), SI - MOVL 20(SP), DX - MOVQ 24(SP), R10 - MOVQ 32(SP), R8 - MOVL $454, AX - SYSCALL - RET - -TEXT runtime·thr_new(SB),NOSPLIT,$0 - MOVQ 8(SP), DI - MOVQ 16(SP), SI - MOVL $455, AX - SYSCALL - RET - -TEXT runtime·thr_start(SB),NOSPLIT,$0 - MOVQ DI, R13 // m - - // set up FS to point at m->tls - LEAQ m_tls(R13), DI - CALL runtime·settls(SB) // smashes DI - - // set up m, g - get_tls(CX) - MOVQ R13, m(CX) - MOVQ m_g0(R13), DI - MOVQ DI, g(CX) - - CALL runtime·stackcheck(SB) - CALL runtime·mstart(SB) - - MOVQ 0, AX // crash (not reached) - -// Exit the entire program (like C exit) -TEXT runtime·exit(SB),NOSPLIT,$-8 - MOVL 8(SP), DI // arg 1 exit status - MOVL $1, AX - SYSCALL - MOVL $0xf1, 0xf1 // crash - RET - -TEXT runtime·exit1(SB),NOSPLIT,$-8 - MOVQ 8(SP), DI // arg 1 exit status - MOVL $431, AX - SYSCALL - MOVL $0xf1, 0xf1 // crash - RET - -TEXT runtime·open(SB),NOSPLIT,$-8 - MOVQ 8(SP), DI // arg 1 pathname - MOVL 16(SP), SI // arg 2 flags - MOVL 20(SP), DX // arg 3 mode - MOVL $5, AX - SYSCALL - RET - -TEXT runtime·close(SB),NOSPLIT,$-8 - MOVL 8(SP), DI // arg 1 fd - MOVL $6, AX - SYSCALL - RET - -TEXT runtime·read(SB),NOSPLIT,$-8 - MOVL 8(SP), DI // arg 1 fd - MOVQ 16(SP), SI // arg 2 buf - MOVL 24(SP), DX // arg 3 count - MOVL $3, AX - SYSCALL - RET - -TEXT runtime·write(SB),NOSPLIT,$-8 - MOVL 8(SP), DI // arg 1 fd - MOVQ 16(SP), SI // arg 2 buf - MOVL 24(SP), DX // arg 3 count - MOVL $4, AX - SYSCALL - RET - -TEXT runtime·getrlimit(SB),NOSPLIT,$-8 - MOVL 8(SP), DI - MOVQ 16(SP), SI - MOVL $194, AX - SYSCALL - RET - -TEXT runtime·raise(SB),NOSPLIT,$16 - // thr_self(&8(SP)) - LEAQ 8(SP), DI // arg 1 &8(SP) - MOVL $432, AX - SYSCALL - // thr_kill(self, SIGPIPE) - MOVQ 8(SP), DI // arg 1 id - MOVL sig+0(FP), SI // arg 2 - MOVL $433, AX - SYSCALL - RET - -TEXT runtime·setitimer(SB), NOSPLIT, $-8 - MOVL 8(SP), DI - MOVQ 16(SP), SI - MOVQ 24(SP), DX - MOVL $83, AX - SYSCALL - RET - -// func now() (sec int64, nsec int32) -TEXT time·now(SB), NOSPLIT, $32 - MOVL $232, AX - MOVQ $0, DI // CLOCK_REALTIME - LEAQ 8(SP), SI - 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, $32 - MOVL $232, AX - // We can use CLOCK_MONOTONIC_FAST here when we drop - // support for FreeBSD 8-STABLE. - MOVQ $4, DI // CLOCK_MONOTONIC - LEAQ 8(SP), SI - SYSCALL - MOVQ 8(SP), AX // sec - MOVQ 16(SP), DX // nsec - - // sec is in AX, nsec in DX - // return nsec in AX - IMULQ $1000000000, AX - ADDQ DX, AX - RET - -TEXT runtime·sigaction(SB),NOSPLIT,$-8 - MOVL 8(SP), DI // arg 1 sig - MOVQ 16(SP), SI // arg 2 act - MOVQ 24(SP), DX // arg 3 oact - MOVL $416, AX - SYSCALL - JCC 2(PC) - MOVL $0xf1, 0xf1 // crash - RET - -TEXT runtime·sigtramp(SB),NOSPLIT,$64 - get_tls(BX) - - // check that m exists - MOVQ m(BX), BP - CMPQ BP, $0 - JNE 5(PC) - MOVQ DI, 0(SP) - MOVQ $runtime·badsignal(SB), AX - CALL AX - RET - - // save g - MOVQ g(BX), R10 - MOVQ R10, 40(SP) - - // g = m->signal - 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 8(SP), DI // arg 1 addr - MOVQ 16(SP), SI // arg 2 len - MOVL 24(SP), DX // arg 3 prot - MOVL 28(SP), R10 // arg 4 flags - MOVL 32(SP), R8 // arg 5 fid - MOVL 36(SP), R9 // arg 6 offset - MOVL $477, AX - SYSCALL - RET - -TEXT runtime·munmap(SB),NOSPLIT,$0 - MOVQ 8(SP), DI // arg 1 addr - MOVQ 16(SP), SI // arg 2 len - MOVL $73, AX - SYSCALL - JCC 2(PC) - MOVL $0xf1, 0xf1 // crash - RET - -TEXT runtime·madvise(SB),NOSPLIT,$0 - MOVQ 8(SP), DI - MOVQ 16(SP), SI - MOVQ 24(SP), DX - MOVQ $75, AX // madvise - SYSCALL - // ignore failure - maybe pages are locked - RET - -TEXT runtime·sigaltstack(SB),NOSPLIT,$-8 - MOVQ new+8(SP), DI - MOVQ old+16(SP), SI - MOVQ $53, AX - SYSCALL - JCC 2(PC) - MOVL $0xf1, 0xf1 // crash - 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 $240, AX // sys_nanosleep - SYSCALL - RET - -// set tls base to DI -TEXT runtime·settls(SB),NOSPLIT,$8 - ADDQ $16, DI // adjust for ELF: wants to use -16(FS) and -8(FS) for g and m - MOVQ DI, 0(SP) - MOVQ SP, SI - MOVQ $129, DI // AMD64_SET_FSBASE - MOVQ $165, AX // sysarch - SYSCALL - JCC 2(PC) - MOVL $0xf1, 0xf1 // crash - RET - -TEXT runtime·sysctl(SB),NOSPLIT,$0 - MOVQ 8(SP), DI // arg 1 - name - MOVL 16(SP), SI // arg 2 - namelen - MOVQ 24(SP), DX // arg 3 - oldp - MOVQ 32(SP), R10 // arg 4 - oldlenp - MOVQ 40(SP), R8 // arg 5 - newp - MOVQ 48(SP), R9 // arg 6 - newlen - MOVQ $202, AX // sys___sysctl - SYSCALL - JCC 3(PC) - NEGQ AX - RET - MOVL $0, AX - RET - -TEXT runtime·osyield(SB),NOSPLIT,$-4 - MOVL $331, AX // sys_sched_yield - SYSCALL - RET - -TEXT runtime·sigprocmask(SB),NOSPLIT,$0 - MOVL $3, DI // arg 1 - how (SIG_SETMASK) - MOVQ 8(SP), SI // arg 2 - set - MOVQ 16(SP), DX // arg 3 - oset - MOVL $340, AX // sys_sigprocmask - SYSCALL - JAE 2(PC) - MOVL $0xf1, 0xf1 // crash - RET - -// int32 runtime·kqueue(void); -TEXT runtime·kqueue(SB),NOSPLIT,$0 - MOVQ $0, DI - MOVQ $0, SI - MOVQ $0, DX - MOVL $362, AX - SYSCALL - JCC 2(PC) - NEGQ AX - RET - -// int32 runtime·kevent(int kq, Kevent *changelist, int nchanges, Kevent *eventlist, int nevents, Timespec *timeout); -TEXT runtime·kevent(SB),NOSPLIT,$0 - MOVL 8(SP), DI - MOVQ 16(SP), SI - MOVL 24(SP), DX - MOVQ 32(SP), R10 - MOVL 40(SP), R8 - MOVQ 48(SP), R9 - MOVL $363, AX - SYSCALL - JCC 2(PC) - NEGQ AX - RET - -// void runtime·closeonexec(int32 fd); -TEXT runtime·closeonexec(SB),NOSPLIT,$0 - MOVL 8(SP), DI // fd - MOVQ $2, SI // F_SETFD - MOVQ $1, DX // FD_CLOEXEC - MOVL $92, AX // fcntl - SYSCALL - RET |