diff options
Diffstat (limited to 'src/runtime/os_freebsd.c')
| -rw-r--r-- | src/runtime/os_freebsd.c | 323 |
1 files changed, 0 insertions, 323 deletions
diff --git a/src/runtime/os_freebsd.c b/src/runtime/os_freebsd.c deleted file mode 100644 index 1c126547a..000000000 --- a/src/runtime/os_freebsd.c +++ /dev/null @@ -1,323 +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 "textflag.h" - -extern SigTab runtime·sigtab[]; -extern int32 runtime·sys_umtx_op(uint32*, int32, uint32, void*, void*); - -// From FreeBSD's <sys/sysctl.h> -#define CTL_HW 6 -#define HW_NCPU 3 - -static Sigset sigset_none; -static Sigset sigset_all = { ~(uint32)0, ~(uint32)0, ~(uint32)0, ~(uint32)0, }; - -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; -} - -// FreeBSD's umtx_op syscall is effectively the same as Linux's futex, and -// thus the code is largely similar. See linux/thread.c and lock_futex.c for comments. - -static void futexsleep(void); - -#pragma textflag NOSPLIT -void -runtime·futexsleep(uint32 *addr, uint32 val, int64 ns) -{ - void (*fn)(void); - - g->m->ptrarg[0] = addr; - g->m->scalararg[0] = val; - g->m->ptrarg[1] = &ns; - - fn = futexsleep; - runtime·onM(&fn); -} - -static void -futexsleep(void) -{ - uint32 *addr; - uint32 val; - int64 ns; - int32 ret; - Timespec ts; - - addr = g->m->ptrarg[0]; - val = g->m->scalararg[0]; - ns = *(int64*)g->m->ptrarg[1]; - g->m->ptrarg[0] = nil; - g->m->scalararg[0] = 0; - g->m->ptrarg[1] = nil; - - if(ns < 0) { - ret = runtime·sys_umtx_op(addr, UMTX_OP_WAIT_UINT_PRIVATE, val, nil, nil); - if(ret >= 0 || ret == -EINTR) - return; - goto fail; - } - // 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); - ret = runtime·sys_umtx_op(addr, UMTX_OP_WAIT_UINT_PRIVATE, val, nil, &ts); - if(ret >= 0 || ret == -EINTR) - return; - -fail: - runtime·prints("umtx_wait addr="); - runtime·printpointer(addr); - runtime·prints(" val="); - runtime·printint(val); - runtime·prints(" ret="); - runtime·printint(ret); - runtime·prints("\n"); - *(int32*)0x1005 = 0x1005; -} - -static void badfutexwakeup(void); - -#pragma textflag NOSPLIT -void -runtime·futexwakeup(uint32 *addr, uint32 cnt) -{ - int32 ret; - void (*fn)(void); - - ret = runtime·sys_umtx_op(addr, UMTX_OP_WAKE_PRIVATE, cnt, nil, nil); - if(ret >= 0) - return; - - g->m->ptrarg[0] = addr; - g->m->scalararg[0] = ret; - fn = badfutexwakeup; - if(g == g->m->gsignal) - fn(); - else - runtime·onM(&fn); - *(int32*)0x1006 = 0x1006; -} - -static void -badfutexwakeup(void) -{ - void *addr; - int32 ret; - - addr = g->m->ptrarg[0]; - ret = g->m->scalararg[0]; - runtime·printf("umtx_wake addr=%p ret=%d\n", addr, ret); -} - -void runtime·thr_start(void*); - -void -runtime·newosproc(M *mp, void *stk) -{ - ThrParam param; - Sigset oset; - - 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); - } - - runtime·sigprocmask(&sigset_all, &oset); - runtime·memclr((byte*)¶m, sizeof param); - - param.start_func = runtime·thr_start; - param.arg = (byte*)mp; - - // NOTE(rsc): This code is confused. stackbase is the top of the stack - // and is equal to stk. However, it's working, so I'm not changing it. - param.stack_base = (void*)mp->g0->stack.hi; - param.stack_size = (byte*)stk - (byte*)mp->g0->stack.hi; - - param.child_tid = (void*)&mp->procid; - param.parent_tid = nil; - param.tls_base = (void*)&mp->tls[0]; - param.tls_size = sizeof mp->tls; - - mp->tls[0] = mp->id; // so 386 asm can find it - - runtime·thr_new(¶m, sizeof param); - runtime·sigprocmask(&oset, nil); -} - -void -runtime·osinit(void) -{ - runtime·ncpu = getncpu(); -} - -#pragma textflag NOSPLIT -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); - runtime·writebarrierptr_nostore(&mp->gsignal, mp->gsignal); - - mp->gsignal->m = mp; - runtime·writebarrierptr_nostore(&mp->gsignal->m, mp->gsignal->m); -} - -// Called to initialize a new m (including the bootstrap m). -// Called on the new thread, can not allocate memory. -void -runtime·minit(void) -{ - // Initialize signal handling - runtime·signalstack((byte*)g->m->gsignal->stack.lo, 32*1024); - runtime·sigprocmask(&sigset_none, nil); -} - -// Called from dropm to undo the effect of an minit. -void -runtime·unminit(void) -{ - runtime·signalstack(nil, 0); -} - -uintptr -runtime·memlimit(void) -{ - Rlimit rl; - extern byte runtime·text[], runtime·end[]; - uintptr used; - - if(runtime·getrlimit(RLIMIT_AS, &rl) != 0) - return 0; - if(rl.rlim_cur >= 0x7fffffff) - return 0; - - // Estimate our VM footprint excluding the heap. - // Not an exact science: use size of binary plus - // some room for thread stacks. - used = runtime·end - runtime·text + (64<<20); - if(used >= rl.rlim_cur) - return 0; - - // If there's not at least 16 MB left, we're probably - // not going to be able to do much. Treat as no limit. - rl.rlim_cur -= used; - if(rl.rlim_cur < (16<<20)) - return 0; - - return rl.rlim_cur - used; -} - -extern void runtime·sigtramp(void); - -typedef struct sigaction { - union { - void (*__sa_handler)(int32); - void (*__sa_sigaction)(int32, Siginfo*, void *); - } __sigaction_u; /* signal handler */ - int32 sa_flags; /* see signal options below */ - Sigset sa_mask; /* signal mask to apply */ -} SigactionT; - -void -runtime·setsig(int32 i, GoSighandler *fn, bool restart) -{ - SigactionT sa; - - runtime·memclr((byte*)&sa, sizeof sa); - sa.sa_flags = SA_SIGINFO|SA_ONSTACK; - if(restart) - sa.sa_flags |= SA_RESTART; - sa.sa_mask.__bits[0] = ~(uint32)0; - sa.sa_mask.__bits[1] = ~(uint32)0; - sa.sa_mask.__bits[2] = ~(uint32)0; - sa.sa_mask.__bits[3] = ~(uint32)0; - if(fn == runtime·sighandler) - fn = (void*)runtime·sigtramp; - sa.__sigaction_u.__sa_sigaction = (void*)fn; - runtime·sigaction(i, &sa, nil); -} - -GoSighandler* -runtime·getsig(int32 i) -{ - SigactionT sa; - - runtime·memclr((byte*)&sa, sizeof sa); - runtime·sigaction(i, nil, &sa); - if((void*)sa.__sigaction_u.__sa_sigaction == runtime·sigtramp) - return runtime·sighandler; - return (void*)sa.__sigaction_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(&sigset_none, nil); -} - -#pragma textflag NOSPLIT -int8* -runtime·signame(int32 sig) -{ - return runtime·sigtab[sig].name; -} |