diff options
Diffstat (limited to 'src/pkg/runtime/cgo/gcc_openbsd_386.c')
-rw-r--r-- | src/pkg/runtime/cgo/gcc_openbsd_386.c | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/src/pkg/runtime/cgo/gcc_openbsd_386.c b/src/pkg/runtime/cgo/gcc_openbsd_386.c deleted file mode 100644 index e682c3725..000000000 --- a/src/pkg/runtime/cgo/gcc_openbsd_386.c +++ /dev/null @@ -1,165 +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. - -#include <sys/types.h> -#include <dlfcn.h> -#include <errno.h> -#include <pthread.h> -#include <signal.h> -#include <string.h> -#include "libcgo.h" - -static void* threadentry(void*); -static void (*setmg_gcc)(void*, void*); - -// TCB_SIZE is sizeof(struct thread_control_block), -// as defined in /usr/src/lib/librthread/tcb.h -#define TCB_SIZE (4 * sizeof(void *)) -#define TLS_SIZE (2 * sizeof(void *)) - -void *__get_tcb(void); -void __set_tcb(void *); - -static int (*sys_pthread_create)(pthread_t *thread, const pthread_attr_t *attr, - void *(*start_routine)(void *), void *arg); - -struct thread_args { - void *(*func)(void *); - void *arg; -}; - -static void -tcb_fixup(int mainthread) -{ - void *newtcb, *oldtcb; - - // The OpenBSD ld.so(1) does not currently support PT_TLS. As a result, - // we need to allocate our own TLS space while preserving the existing - // TCB that has been setup via librthread. - - newtcb = malloc(TCB_SIZE + TLS_SIZE); - if(newtcb == NULL) - abort(); - - // The signal trampoline expects the TLS slots to be zeroed. - bzero(newtcb, TLS_SIZE); - - oldtcb = __get_tcb(); - bcopy(oldtcb, newtcb + TLS_SIZE, TCB_SIZE); - __set_tcb(newtcb + TLS_SIZE); - - // NOTE(jsing, minux): we can't free oldtcb without causing double-free - // problem. so newtcb will be memory leaks. Get rid of this when OpenBSD - // has proper support for PT_TLS. -} - -static void * -thread_start_wrapper(void *arg) -{ - struct thread_args args = *(struct thread_args *)arg; - - free(arg); - tcb_fixup(0); - - return args.func(args.arg); -} - -int -pthread_create(pthread_t *thread, const pthread_attr_t *attr, - void *(*start_routine)(void *), void *arg) -{ - struct thread_args *p; - - p = malloc(sizeof(*p)); - if(p == NULL) { - errno = ENOMEM; - return -1; - } - p->func = start_routine; - p->arg = arg; - - return sys_pthread_create(thread, attr, thread_start_wrapper, p); -} - -void -x_cgo_init(G *g, void (*setmg)(void*, void*)) -{ - pthread_attr_t attr; - size_t size; - void *handle; - - setmg_gcc = setmg; - pthread_attr_init(&attr); - pthread_attr_getstacksize(&attr, &size); - g->stackguard = (uintptr)&attr - size + 4096; - pthread_attr_destroy(&attr); - - // Locate symbol for the system pthread_create function. - handle = dlopen("libpthread.so", RTLD_LAZY); - if(handle == NULL) { - fprintf(stderr, "dlopen: failed to load libpthread: %s\n", dlerror()); - abort(); - } - sys_pthread_create = dlsym(handle, "pthread_create"); - if(sys_pthread_create == NULL) { - fprintf(stderr, "dlsym: failed to find pthread_create: %s\n", dlerror()); - abort(); - } - dlclose(handle); - - tcb_fixup(1); -} - - -void -_cgo_sys_thread_start(ThreadStart *ts) -{ - pthread_attr_t attr; - sigset_t ign, oset; - pthread_t p; - size_t size; - int err; - - sigfillset(&ign); - pthread_sigmask(SIG_SETMASK, &ign, &oset); - - pthread_attr_init(&attr); - pthread_attr_getstacksize(&attr, &size); - ts->g->stackguard = size; - err = sys_pthread_create(&p, &attr, threadentry, ts); - - pthread_sigmask(SIG_SETMASK, &oset, nil); - - if (err != 0) { - fprintf(stderr, "runtime/cgo: pthread_create failed: %s\n", strerror(err)); - abort(); - } -} - -static void* -threadentry(void *v) -{ - ThreadStart ts; - - tcb_fixup(0); - - ts = *(ThreadStart*)v; - free(v); - - ts.g->stackbase = (uintptr)&ts; - - /* - * _cgo_sys_thread_start set stackguard to stack size; - * change to actual guard pointer. - */ - ts.g->stackguard = (uintptr)&ts - ts.g->stackguard + 4096; - - /* - * Set specific keys. - */ - setmg_gcc((void*)ts.m, (void*)ts.g); - - crosscall_386(ts.fn); - return nil; -} |