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Diffstat (limited to 'src/pkg/runtime/os_netbsd.c')
-rw-r--r--src/pkg/runtime/os_netbsd.c338
1 files changed, 0 insertions, 338 deletions
diff --git a/src/pkg/runtime/os_netbsd.c b/src/pkg/runtime/os_netbsd.c
deleted file mode 100644
index 93229bffe..000000000
--- a/src/pkg/runtime/os_netbsd.c
+++ /dev/null
@@ -1,338 +0,0 @@
-// Copyright 2011 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.
-
-#include "runtime.h"
-#include "defs_GOOS_GOARCH.h"
-#include "os_GOOS.h"
-#include "signal_unix.h"
-#include "stack.h"
-#include "../../cmd/ld/textflag.h"
-
-enum
-{
- ESRCH = 3,
- ENOTSUP = 91,
-
- // From NetBSD's <sys/time.h>
- CLOCK_REALTIME = 0,
- CLOCK_VIRTUAL = 1,
- CLOCK_PROF = 2,
- CLOCK_MONOTONIC = 3
-};
-
-extern SigTab runtime·sigtab[];
-
-static Sigset sigset_none;
-static Sigset sigset_all = { ~(uint32)0, ~(uint32)0, ~(uint32)0, ~(uint32)0, };
-
-extern void runtime·getcontext(UcontextT *context);
-extern int32 runtime·lwp_create(UcontextT *context, uintptr flags, void *lwpid);
-extern void runtime·lwp_mcontext_init(void *mc, void *stack, M *mp, G *gp, void (*fn)(void));
-extern int32 runtime·lwp_park(Timespec *abstime, int32 unpark, void *hint, void *unparkhint);
-extern int32 runtime·lwp_unpark(int32 lwp, void *hint);
-extern int32 runtime·lwp_self(void);
-
-// From NetBSD's <sys/sysctl.h>
-#define CTL_HW 6
-#define HW_NCPU 3
-
-static int32
-getncpu(void)
-{
- uint32 mib[2];
- uint32 out;
- int32 ret;
- uintptr nout;
-
- // Fetch hw.ncpu via sysctl.
- mib[0] = CTL_HW;
- mib[1] = HW_NCPU;
- nout = sizeof out;
- out = 0;
- ret = runtime·sysctl(mib, 2, (byte*)&out, &nout, nil, 0);
- if(ret >= 0)
- return out;
- else
- return 1;
-}
-
-uintptr
-runtime·semacreate(void)
-{
- return 1;
-}
-
-#pragma textflag NOSPLIT
-int32
-runtime·semasleep(int64 ns)
-{
- Timespec ts;
-
- // spin-mutex lock
- while(runtime·xchg(&m->waitsemalock, 1))
- runtime·osyield();
-
- for(;;) {
- // lock held
- if(m->waitsemacount == 0) {
- // sleep until semaphore != 0 or timeout.
- // thrsleep unlocks m->waitsemalock.
- if(ns < 0) {
- // TODO(jsing) - potential deadlock!
- //
- // There is a potential deadlock here since we
- // have to release the waitsemalock mutex
- // before we call lwp_park() to suspend the
- // thread. This allows another thread to
- // release the lock and call lwp_unpark()
- // before the thread is actually suspended.
- // If this occurs the current thread will end
- // up sleeping indefinitely. Unfortunately
- // the NetBSD kernel does not appear to provide
- // a mechanism for unlocking the userspace
- // mutex once the thread is actually parked.
- runtime·atomicstore(&m->waitsemalock, 0);
- runtime·lwp_park(nil, 0, &m->waitsemacount, nil);
- } else {
- ns = ns + runtime·nanotime();
- // NOTE: tv_nsec is int64 on amd64, so this assumes a little-endian system.
- ts.tv_nsec = 0;
- ts.tv_sec = runtime·timediv(ns, 1000000000, (int32*)&ts.tv_nsec);
- // TODO(jsing) - potential deadlock!
- // See above for details.
- runtime·atomicstore(&m->waitsemalock, 0);
- runtime·lwp_park(&ts, 0, &m->waitsemacount, nil);
- }
- // reacquire lock
- while(runtime·xchg(&m->waitsemalock, 1))
- runtime·osyield();
- }
-
- // lock held (again)
- if(m->waitsemacount != 0) {
- // semaphore is available.
- m->waitsemacount--;
- // spin-mutex unlock
- runtime·atomicstore(&m->waitsemalock, 0);
- return 0; // semaphore acquired
- }
-
- // semaphore not available.
- // if there is a timeout, stop now.
- // otherwise keep trying.
- if(ns >= 0)
- break;
- }
-
- // lock held but giving up
- // spin-mutex unlock
- runtime·atomicstore(&m->waitsemalock, 0);
- return -1;
-}
-
-void
-runtime·semawakeup(M *mp)
-{
- uint32 ret;
-
- // spin-mutex lock
- while(runtime·xchg(&mp->waitsemalock, 1))
- runtime·osyield();
- mp->waitsemacount++;
- // TODO(jsing) - potential deadlock, see semasleep() for details.
- // Confirm that LWP is parked before unparking...
- ret = runtime·lwp_unpark(mp->procid, &mp->waitsemacount);
- if(ret != 0 && ret != ESRCH)
- runtime·printf("thrwakeup addr=%p sem=%d ret=%d\n", &mp->waitsemacount, mp->waitsemacount, ret);
- // spin-mutex unlock
- runtime·atomicstore(&mp->waitsemalock, 0);
-}
-
-void
-runtime·newosproc(M *mp, void *stk)
-{
- UcontextT uc;
- int32 ret;
-
- if(0) {
- runtime·printf(
- "newosproc stk=%p m=%p g=%p id=%d/%d ostk=%p\n",
- stk, mp, mp->g0, mp->id, (int32)mp->tls[0], &mp);
- }
-
- mp->tls[0] = mp->id; // so 386 asm can find it
-
- runtime·getcontext(&uc);
-
- uc.uc_flags = _UC_SIGMASK | _UC_CPU;
- uc.uc_link = nil;
- uc.uc_sigmask = sigset_all;
-
- runtime·lwp_mcontext_init(&uc.uc_mcontext, stk, mp, mp->g0, runtime·mstart);
-
- ret = runtime·lwp_create(&uc, 0, &mp->procid);
-
- if(ret < 0) {
- runtime·printf("runtime: failed to create new OS thread (have %d already; errno=%d)\n", runtime·mcount() - 1, -ret);
- runtime·throw("runtime.newosproc");
- }
-}
-
-void
-runtime·osinit(void)
-{
- runtime·ncpu = getncpu();
-}
-
-void
-runtime·get_random_data(byte **rnd, int32 *rnd_len)
-{
- #pragma dataflag NOPTR
- static byte urandom_data[HashRandomBytes];
- int32 fd;
- fd = runtime·open("/dev/urandom", 0 /* O_RDONLY */, 0);
- if(runtime·read(fd, urandom_data, HashRandomBytes) == HashRandomBytes) {
- *rnd = urandom_data;
- *rnd_len = HashRandomBytes;
- } else {
- *rnd = nil;
- *rnd_len = 0;
- }
- runtime·close(fd);
-}
-
-void
-runtime·goenvs(void)
-{
- runtime·goenvs_unix();
-}
-
-// Called to initialize a new m (including the bootstrap m).
-// Called on the parent thread (main thread in case of bootstrap), can allocate memory.
-void
-runtime·mpreinit(M *mp)
-{
- mp->gsignal = runtime·malg(32*1024);
-}
-
-// Called to initialize a new m (including the bootstrap m).
-// Called on the new thread, can not allocate memory.
-void
-runtime·minit(void)
-{
- m->procid = runtime·lwp_self();
-
- // Initialize signal handling
- runtime·signalstack((byte*)m->gsignal->stackguard - StackGuard, 32*1024);
- runtime·sigprocmask(SIG_SETMASK, &sigset_none, nil);
-}
-
-// Called from dropm to undo the effect of an minit.
-void
-runtime·unminit(void)
-{
- runtime·signalstack(nil, 0);
-}
-
-void
-runtime·sigpanic(void)
-{
- if(!runtime·canpanic(g))
- runtime·throw("unexpected signal during runtime execution");
-
- switch(g->sig) {
- case SIGBUS:
- if(g->sigcode0 == BUS_ADRERR && g->sigcode1 < 0x1000 || g->paniconfault) {
- if(g->sigpc == 0)
- runtime·panicstring("call of nil func value");
- runtime·panicstring("invalid memory address or nil pointer dereference");
- }
- runtime·printf("unexpected fault address %p\n", g->sigcode1);
- runtime·throw("fault");
- case SIGSEGV:
- if((g->sigcode0 == 0 || g->sigcode0 == SEGV_MAPERR || g->sigcode0 == SEGV_ACCERR) && g->sigcode1 < 0x1000 || g->paniconfault) {
- if(g->sigpc == 0)
- runtime·panicstring("call of nil func value");
- runtime·panicstring("invalid memory address or nil pointer dereference");
- }
- runtime·printf("unexpected fault address %p\n", g->sigcode1);
- runtime·throw("fault");
- case SIGFPE:
- switch(g->sigcode0) {
- case FPE_INTDIV:
- runtime·panicstring("integer divide by zero");
- case FPE_INTOVF:
- runtime·panicstring("integer overflow");
- }
- runtime·panicstring("floating point error");
- }
- runtime·panicstring(runtime·sigtab[g->sig].name);
-}
-
-uintptr
-runtime·memlimit(void)
-{
- return 0;
-}
-
-extern void runtime·sigtramp(void);
-
-typedef struct sigaction {
- union {
- void (*_sa_handler)(int32);
- void (*_sa_sigaction)(int32, Siginfo*, void *);
- } _sa_u; /* signal handler */
- uint32 sa_mask[4]; /* signal mask to apply */
- int32 sa_flags; /* see signal options below */
-} Sigaction;
-
-void
-runtime·setsig(int32 i, GoSighandler *fn, bool restart)
-{
- Sigaction sa;
-
- runtime·memclr((byte*)&sa, sizeof sa);
- sa.sa_flags = SA_SIGINFO|SA_ONSTACK;
- if(restart)
- sa.sa_flags |= SA_RESTART;
- sa.sa_mask[0] = ~0U;
- sa.sa_mask[1] = ~0U;
- sa.sa_mask[2] = ~0U;
- sa.sa_mask[3] = ~0U;
- if (fn == runtime·sighandler)
- fn = (void*)runtime·sigtramp;
- sa._sa_u._sa_sigaction = (void*)fn;
- runtime·sigaction(i, &sa, nil);
-}
-
-GoSighandler*
-runtime·getsig(int32 i)
-{
- Sigaction sa;
-
- runtime·memclr((byte*)&sa, sizeof sa);
- runtime·sigaction(i, nil, &sa);
- if((void*)sa._sa_u._sa_sigaction == runtime·sigtramp)
- return runtime·sighandler;
- return (void*)sa._sa_u._sa_sigaction;
-}
-
-void
-runtime·signalstack(byte *p, int32 n)
-{
- StackT st;
-
- st.ss_sp = (void*)p;
- st.ss_size = n;
- st.ss_flags = 0;
- if(p == nil)
- st.ss_flags = SS_DISABLE;
- runtime·sigaltstack(&st, nil);
-}
-
-void
-runtime·unblocksignals(void)
-{
- runtime·sigprocmask(SIG_SETMASK, &sigset_none, nil);
-}
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