1 files changed, 0 insertions, 155 deletions
diff --git a/src/pkg/runtime/cgo/gcc_darwin_386.c b/src/pkg/runtime/cgo/gcc_darwin_386.c
deleted file mode 100644
index d1ef31ed4..000000000
--- a/src/pkg/runtime/cgo/gcc_darwin_386.c
+++ /dev/null
@@ -1,155 +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 <string.h> /* for strerror */
-#include <pthread.h>
-#include <signal.h>
-#include "libcgo.h"
-
-static void* threadentry(void*);
-static pthread_key_t k1;
-
-#define magic1 (0x23581321U)
-
-static void
-inittls(void)
-{
-	uint32 x;
-	pthread_key_t tofree[128], k;
-	int i, ntofree;
-
-	/*
-	 * Allocate thread-local storage slot for g.
-	 * The key numbers start at 0x100, and we expect to be
-	 * one of the early calls to pthread_key_create, so we
-	 * should be able to get a pretty low number.
-	 *
-	 * In Darwin/386 pthreads, %gs points at the thread
-	 * structure, and each key is an index into the thread-local
-	 * storage array that begins at offset 0x48 within in that structure.
-	 * It may happen that we are not quite the first function to try
-	 * to allocate thread-local storage keys, so instead of depending
-	 * on getting 0x100, we try for 0x108, allocating keys until
-	 * we get the one we want and then freeing the ones we didn't want.
-	 *
-	 * Thus the final offset to use in %gs references is
-	 * 0x48+4*0x108 = 0x468.
-	 *
-	 * The linker and runtime hard-code this constant offset
-	 * from %gs where we expect to find g.
-	 * Known to ../../../liblink/sym.c:/468
-	 * and to ../sys_darwin_386.s:/468
-	 *
-	 * This is truly disgusting and a bit fragile, but taking care
-	 * of it here protects the rest of the system from damage.
-	 * The alternative would be to use a global variable that
-	 * held the offset and refer to that variable each time we
-	 * need a %gs variable (g).  That approach would
-	 * require an extra instruction and memory reference in
-	 * every stack growth prolog and would also require
-	 * rewriting the code that 8c generates for extern registers.
-	 *
-	 * Things get more disgusting on OS X 10.7 Lion.
-	 * The 0x48 base mentioned above is the offset of the tsd
-	 * array within the per-thread structure on Leopard and Snow Leopard.
-	 * On Lion, the base moved a little, so while the math above
-	 * still applies, the base is different.  Thus, we cannot
-	 * look for specific key values if we want to build binaries
-	 * that run on both systems.  Instead, forget about the
-	 * specific key values and just allocate and initialize per-thread
-	 * storage until we find a key that writes to the memory location
-	 * we want.  Then keep that key.
-	 */
-	ntofree = 0;
-	for(;;) {
-		if(pthread_key_create(&k, nil) < 0) {
-			fprintf(stderr, "runtime/cgo: pthread_key_create failed\n");
-			abort();
-		}
-		pthread_setspecific(k, (void*)magic1);
-		asm volatile("movl %%gs:0x468, %0" : "=r"(x));
-		pthread_setspecific(k, 0);
-		if(x == magic1) {
-			k1 = k;
-			break;
-		}
-		if(ntofree >= nelem(tofree)) {
-			fprintf(stderr, "runtime/cgo: could not obtain pthread_keys\n");
-			fprintf(stderr, "\ttried");
-			for(i=0; i<ntofree; i++)
-				fprintf(stderr, " %#x", (unsigned)tofree[i]);
-			fprintf(stderr, "\n");
-			abort();
-		}
-		tofree[ntofree++] = k;
-	}
-
-	/*
-	 * We got the key we wanted.  Free the others.
-	 */
-	for(i=0; i<ntofree; i++)
-		pthread_key_delete(tofree[i]);
-}
-
-void
-x_cgo_init(G *g)
-{
-	pthread_attr_t attr;
-	size_t size;
-
-	pthread_attr_init(&attr);
-	pthread_attr_getstacksize(&attr, &size);
-	g->stackguard = (uintptr)&attr - size + 4096;
-	pthread_attr_destroy(&attr);
-
-	inittls();
-}
-
-
-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 = 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;
-
-	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;
-
-	pthread_setspecific(k1, (void*)ts.g);
-
-	crosscall_386(ts.fn);
-	return nil;
-}