case obj.R_TLS_LE:
isAndroidX86 := obj.GOOS == "android" && (SysArch.InFamily(sys.AMD64, sys.I386))
- if Linkmode == LinkExternal && Iself && Headtype != obj.Hopenbsd && !isAndroidX86 {
+ if Linkmode == LinkExternal && Iself && !isAndroidX86 {
r.Done = 0
if r.Sym == nil {
r.Sym = ctxt.Tlsg
case obj.R_TLS_IE:
isAndroidX86 := obj.GOOS == "android" && (SysArch.InFamily(sys.AMD64, sys.I386))
- if Linkmode == LinkExternal && Iself && Headtype != obj.Hopenbsd && !isAndroidX86 {
+ if Linkmode == LinkExternal && Iself && !isAndroidX86 {
r.Done = 0
if r.Sym == nil {
r.Sym = ctxt.Tlsg
if len(data[obj.STLSBSS]) > 0 {
var sect *Section
- if Iself && (Linkmode == LinkExternal || !*FlagD) && Headtype != obj.Hopenbsd {
+ if Iself && (Linkmode == LinkExternal || !*FlagD) {
sect = addsection(&Segdata, ".tbss", 06)
sect.Align = int32(SysArch.PtrSize)
sect.Vaddr = 0
Addstring(shstrtab, ".bss")
Addstring(shstrtab, ".noptrbss")
- // generate .tbss section (except for OpenBSD where it's not supported)
- // for dynamic internal linker or external linking, so that various
- // binutils could correctly calculate PT_TLS size.
- // see https://golang.org/issue/5200.
- if Headtype != obj.Hopenbsd {
- if !*FlagD || Linkmode == LinkExternal {
- Addstring(shstrtab, ".tbss")
- }
+ // generate .tbss section for dynamic internal linker or external
+ // linking, so that various binutils could correctly calculate
+ // PT_TLS size. See https://golang.org/issue/5200.
+ if !*FlagD || Linkmode == LinkExternal {
+ Addstring(shstrtab, ".tbss")
}
if Headtype == obj.Hnetbsd {
Addstring(shstrtab, ".note.netbsd.ident")
/*
* Thread-local storage segment (really just size).
*/
- // Do not emit PT_TLS for OpenBSD since ld.so(1) does
- // not currently support it. This is handled
- // appropriately in runtime/cgo.
- if Headtype != obj.Hopenbsd {
- tlssize := uint64(0)
- for sect := Segdata.Sect; sect != nil; sect = sect.Next {
- if sect.Name == ".tbss" {
- tlssize = sect.Length
- }
- }
- if tlssize != 0 {
- ph := newElfPhdr()
- ph.type_ = PT_TLS
- ph.flags = PF_R
- ph.memsz = tlssize
- ph.align = uint64(SysArch.RegSize)
+ tlssize := uint64(0)
+ for sect := Segdata.Sect; sect != nil; sect = sect.Next {
+ if sect.Name == ".tbss" {
+ tlssize = sect.Length
}
}
+ if tlssize != 0 {
+ ph := newElfPhdr()
+ ph.type_ = PT_TLS
+ ph.flags = PF_R
+ ph.memsz = tlssize
+ ph.align = uint64(SysArch.RegSize)
+ }
}
if Headtype == obj.Hlinux {
put(ctxt, s, s.Extname, UndefinedSym, 0, nil)
case obj.STLSBSS:
- if Linkmode == LinkExternal && Headtype != obj.Hopenbsd {
+ if Linkmode == LinkExternal {
put(ctxt, s, s.Name, TLSSym, Symaddr(s), s.Gotype)
}
}
// license that can be found in the LICENSE file.
// +build cgo
-// +build darwin dragonfly freebsd linux netbsd solaris
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris
#include <pthread.h>
#include <errno.h>
-// Copyright 2015 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 <errno.h>
-#include <pthread.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include "libcgo.h"
-
-// The context function, used when tracing back C calls into Go.
-static void (*cgo_context_function)(struct context_arg*);
-
-void
-x_cgo_sys_thread_create(void* (*func)(void*), void* arg) {
- fprintf(stderr, "x_cgo_sys_thread_create not implemented");
- abort();
-}
-
-uintptr_t
-_cgo_wait_runtime_init_done() {
- void (*pfn)(struct context_arg*);
-
- // TODO(spetrovic): implement this method.
-
- pfn = _cgo_get_context_function();
- if (pfn != nil) {
- struct context_arg arg;
-
- arg.Context = 0;
- (*pfn)(&arg);
- return arg.Context;
- }
- return 0;
-}
-
-void
-x_cgo_notify_runtime_init_done(void* dummy) {
- // TODO(spetrovic): implement this method.
-}
-
-// Sets the context function to call to record the traceback context
-// when calling a Go function from C code. Called from runtime.SetCgoTraceback.
-void x_cgo_set_context_function(void (*context)(struct context_arg*)) {
- // TODO(iant): Needs synchronization.
- cgo_context_function = context;
-}
-
-// Gets the context function.
-void (*(_cgo_get_context_function(void)))(struct context_arg*) {
- return cgo_context_function;
-}
-
-// _cgo_try_pthread_create retries sys_pthread_create if it fails with
-// EAGAIN.
-int
-_cgo_openbsd_try_pthread_create(int (*sys_pthread_create)(pthread_t*, const pthread_attr_t*, void* (*)(void*), void*),
- pthread_t* thread, const pthread_attr_t* attr, void* (*pfn)(void*), void* arg) {
- int tries;
- int err;
- struct timespec ts;
-
- for (tries = 0; tries < 100; tries++) {
- err = sys_pthread_create(thread, attr, pfn, arg);
- if (err != EAGAIN) {
- return err;
- }
- ts.tv_sec = 0;
- ts.tv_nsec = (tries + 1) * 1000 * 1000; // Milliseconds.
- nanosleep(&ts, nil);
- }
- return EAGAIN;
-}
// 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>
static void* threadentry(void*);
static void (*setg_gcc)(void*);
-// TCB_SIZE is sizeof(struct thread_control_block), as defined in
-// /usr/src/lib/librthread/tcb.h on OpenBSD 5.9 and earlier.
-#define TCB_SIZE (4 * sizeof(void *))
-
-// TIB_SIZE is sizeof(struct tib), as defined in
-// /usr/include/tib.h on OpenBSD 6.0 and later.
-#define TIB_SIZE (4 * sizeof(void *) + 6 * sizeof(int))
-
-// TLS_SIZE is the size of TLS needed for Go.
-#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 int has_tib = 0;
-
-static void
-tcb_fixup(int mainthread)
-{
- void *tls, *newtcb, *oldtcb;
- size_t tls_size, tcb_size;
-
- // TODO(jsing): Remove once OpenBSD 6.1 is released and OpenBSD 5.9 is
- // no longer supported.
-
- // 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 or TIB that has been setup via librthread.
-
- tcb_size = has_tib ? TIB_SIZE : TCB_SIZE;
- tls_size = TLS_SIZE + tcb_size;
- tls = malloc(tls_size);
- if(tls == NULL)
- abort();
-
- // The signal trampoline expects the TLS slots to be zeroed.
- bzero(tls, TLS_SIZE);
-
- oldtcb = __get_tcb();
- newtcb = tls + TLS_SIZE;
- bcopy(oldtcb, newtcb, tcb_size);
- if(has_tib) {
- // Fix up self pointer.
- *(uintptr_t *)(newtcb) = (uintptr_t)newtcb;
- }
- __set_tcb(newtcb);
-
- // 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);
-}
-
-static void init_pthread_wrapper(void) {
- void *handle;
-
- // Locate symbol for the system pthread_create function.
- handle = dlopen("libpthread.so", RTLD_LAZY);
- if(handle == NULL) {
- fprintf(stderr, "runtime/cgo: dlopen failed to load libpthread: %s\n", dlerror());
- abort();
- }
- sys_pthread_create = dlsym(handle, "pthread_create");
- if(sys_pthread_create == NULL) {
- fprintf(stderr, "runtime/cgo: dlsym failed to find pthread_create: %s\n", dlerror());
- abort();
- }
- // _rthread_init is hidden in OpenBSD librthread that has TIB.
- if(dlsym(handle, "_rthread_init") == NULL) {
- has_tib = 1;
- }
- dlclose(handle);
-}
-
-static pthread_once_t init_pthread_wrapper_once = PTHREAD_ONCE_INIT;
-
-int
-pthread_create(pthread_t *thread, const pthread_attr_t *attr,
- void *(*start_routine)(void *), void *arg)
-{
- struct thread_args *p;
-
- // we must initialize our wrapper in pthread_create, because it is valid to call
- // pthread_create in a static constructor, and in fact, our test for issue 9456
- // does just that.
- if(pthread_once(&init_pthread_wrapper_once, init_pthread_wrapper) != 0) {
- fprintf(stderr, "runtime/cgo: failed to initialize pthread_create wrapper\n");
- abort();
- }
-
- 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 (*setg)(void*))
{
pthread_attr_getstacksize(&attr, &size);
g->stacklo = (uintptr)&attr - size + 4096;
pthread_attr_destroy(&attr);
-
- if(pthread_once(&init_pthread_wrapper_once, init_pthread_wrapper) != 0) {
- fprintf(stderr, "runtime/cgo: failed to initialize pthread_create wrapper\n");
- abort();
- }
-
- tcb_fixup(1);
}
-
void
_cgo_sys_thread_start(ThreadStart *ts)
{
// Leave stacklo=0 and set stackhi=size; mstack will do the rest.
ts->g->stackhi = size;
- err = _cgo_openbsd_try_pthread_create(sys_pthread_create, &p, &attr, threadentry, ts);
+ err = _cgo_try_pthread_create(&p, &attr, threadentry, ts);
pthread_sigmask(SIG_SETMASK, &oset, nil);
{
ThreadStart ts;
- tcb_fixup(0);
-
ts = *(ThreadStart*)v;
free(v);
// 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>
static void* threadentry(void*);
static void (*setg_gcc)(void*);
-// TCB_SIZE is sizeof(struct thread_control_block), as defined in
-// /usr/src/lib/librthread/tcb.h on OpenBSD 5.9 and earlier.
-#define TCB_SIZE (4 * sizeof(void *))
-
-// TIB_SIZE is sizeof(struct tib), as defined in
-// /usr/include/tib.h on OpenBSD 6.0 and later.
-#define TIB_SIZE (4 * sizeof(void *) + 6 * sizeof(int))
-
-// TLS_SIZE is the size of TLS needed for Go.
-#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 int has_tib = 0;
-
-static void
-tcb_fixup(int mainthread)
-{
- void *tls, *newtcb, *oldtcb;
- size_t tls_size, tcb_size;
-
- // TODO(jsing): Remove once OpenBSD 6.1 is released and OpenBSD 5.9 is
- // no longer supported.
-
- // 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 or TIB that has been setup via librthread.
-
- tcb_size = has_tib ? TIB_SIZE : TCB_SIZE;
- tls_size = TLS_SIZE + tcb_size;
- tls = malloc(tls_size);
- if(tls == NULL)
- abort();
-
- // The signal trampoline expects the TLS slots to be zeroed.
- bzero(tls, TLS_SIZE);
-
- oldtcb = __get_tcb();
- newtcb = tls + TLS_SIZE;
- bcopy(oldtcb, newtcb, tcb_size);
- if(has_tib) {
- // Fix up self pointer.
- *(uintptr_t *)(newtcb) = (uintptr_t)newtcb;
- }
- __set_tcb(newtcb);
-
- // 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);
-}
-
-static void init_pthread_wrapper(void) {
- void *handle;
-
- // Locate symbol for the system pthread_create function.
- handle = dlopen("libpthread.so", RTLD_LAZY);
- if(handle == NULL) {
- fprintf(stderr, "runtime/cgo: dlopen failed to load libpthread: %s\n", dlerror());
- abort();
- }
- sys_pthread_create = dlsym(handle, "pthread_create");
- if(sys_pthread_create == NULL) {
- fprintf(stderr, "runtime/cgo: dlsym failed to find pthread_create: %s\n", dlerror());
- abort();
- }
- // _rthread_init is hidden in OpenBSD librthread that has TIB.
- if(dlsym(handle, "_rthread_init") == NULL) {
- has_tib = 1;
- }
- dlclose(handle);
-}
-
-static pthread_once_t init_pthread_wrapper_once = PTHREAD_ONCE_INIT;
-
-int
-pthread_create(pthread_t *thread, const pthread_attr_t *attr,
- void *(*start_routine)(void *), void *arg)
-{
- struct thread_args *p;
-
- // we must initialize our wrapper in pthread_create, because it is valid to call
- // pthread_create in a static constructor, and in fact, our test for issue 9456
- // does just that.
- if(pthread_once(&init_pthread_wrapper_once, init_pthread_wrapper) != 0) {
- fprintf(stderr, "runtime/cgo: failed to initialize pthread_create wrapper\n");
- abort();
- }
-
- 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 (*setg)(void*))
{
pthread_attr_getstacksize(&attr, &size);
g->stacklo = (uintptr)&attr - size + 4096;
pthread_attr_destroy(&attr);
-
- if(pthread_once(&init_pthread_wrapper_once, init_pthread_wrapper) != 0) {
- fprintf(stderr, "runtime/cgo: failed to initialize pthread_create wrapper\n");
- abort();
- }
-
- tcb_fixup(1);
}
-
void
_cgo_sys_thread_start(ThreadStart *ts)
{
// Leave stacklo=0 and set stackhi=size; mstack will do the rest.
ts->g->stackhi = size;
- err = _cgo_openbsd_try_pthread_create(sys_pthread_create, &p, &attr, threadentry, ts);
+ err = _cgo_try_pthread_create(&p, &attr, threadentry, ts);
pthread_sigmask(SIG_SETMASK, &oset, nil);
{
ThreadStart ts;
- tcb_fixup(0);
-
ts = *(ThreadStart*)v;
free(v);
import _ "unsafe" // for go:linkname
-// Supply environ, __progname and __guard_local, because
-// we don't link against the standard OpenBSD crt0.o and
-// the libc dynamic library needs them.
+// Supply __guard_local because we don't link against the standard
+// OpenBSD crt0.o and the libc dynamic library needs it.
-//go:linkname _environ environ
-//go:linkname _progname __progname
//go:linkname _guard_local __guard_local
-var _environ uintptr
-var _progname uintptr
var _guard_local uintptr
-//go:cgo_export_dynamic environ environ
-//go:cgo_export_dynamic __progname __progname
-
// This is normally marked as hidden and placed in the
// .openbsd.randomdata section.
//go:cgo_export_dynamic __guard_local __guard_local
-
-// We override pthread_create to support PT_TLS.
-//go:cgo_export_dynamic pthread_create pthread_create