diff options
Diffstat (limited to 'src/pkg/runtime/thread_freebsd.c')
| -rw-r--r-- | src/pkg/runtime/thread_freebsd.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/src/pkg/runtime/thread_freebsd.c b/src/pkg/runtime/thread_freebsd.c new file mode 100644 index 000000000..1c48865a2 --- /dev/null +++ b/src/pkg/runtime/thread_freebsd.c @@ -0,0 +1,162 @@ +// Use of this source file 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 "stack.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 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. + +void +runtime·futexsleep(uint32 *addr, uint32 val, int64 ns) +{ + int32 ret; + Timespec ts, *tsp; + + if(ns < 0) + tsp = nil; + else { + ts.tv_sec = ns / 1000000000LL; + ts.tv_nsec = ns % 1000000000LL; + tsp = &ts; + } + + ret = runtime·sys_umtx_op(addr, UMTX_OP_WAIT, val, nil, tsp); + if(ret >= 0 || ret == -EINTR) + return; + + runtime·printf("umtx_wait addr=%p val=%d ret=%d\n", addr, val, ret); + *(int32*)0x1005 = 0x1005; +} + +void +runtime·futexwakeup(uint32 *addr, uint32 cnt) +{ + int32 ret; + + ret = runtime·sys_umtx_op(addr, UMTX_OP_WAKE, cnt, nil, nil); + if(ret >= 0) + return; + + runtime·printf("umtx_wake addr=%p ret=%d\n", addr, ret); + *(int32*)0x1006 = 0x1006; +} + +void runtime·thr_start(void*); + +void +runtime·newosproc(M *m, G *g, void *stk, void (*fn)(void)) +{ + ThrParam param; + + USED(fn); // thr_start assumes fn == mstart + USED(g); // thr_start assumes g == m->g0 + + if(0){ + runtime·printf("newosproc stk=%p m=%p g=%p fn=%p id=%d/%d ostk=%p\n", + stk, m, g, fn, m->id, m->tls[0], &m); + } + + runtime·memclr((byte*)¶m, sizeof param); + + param.start_func = runtime·thr_start; + param.arg = m; + param.stack_base = (int8*)g->stackbase; + param.stack_size = (byte*)stk - (byte*)g->stackbase; + param.child_tid = (intptr*)&m->procid; + param.parent_tid = nil; + param.tls_base = (int8*)&m->tls[0]; + param.tls_size = sizeof m->tls; + + m->tls[0] = m->id; // so 386 asm can find it + + runtime·thr_new(¶m, sizeof param); +} + +void +runtime·osinit(void) +{ + runtime·ncpu = getncpu(); +} + +void +runtime·goenvs(void) +{ + runtime·goenvs_unix(); +} + +// Called to initialize a new m (including the bootstrap m). +void +runtime·minit(void) +{ + // Initialize signal handling + m->gsignal = runtime·malg(32*1024); + runtime·signalstack(m->gsignal->stackguard - StackGuard, 32*1024); +} + +void +runtime·sigpanic(void) +{ + switch(g->sig) { + case SIGBUS: + if(g->sigcode0 == BUS_ADRERR && g->sigcode1 < 0x1000) { + 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) { + 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); +} + +// TODO: fill this in properly. +void +runtime·osyield(void) +{ +} |