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📄 abi_amd64.h(2.73 KB)
📄 abi_arm64.h(1.5 KB)
📄 asm_386.s(737 B)
📄 asm_amd64.s(937 B)
📄 asm_arm.s(1.76 KB)
📄 asm_arm64.s(1.01 KB)
📄 asm_loong64.s(1.66 KB)
📄 asm_mips64x.s(2.05 KB)
📄 asm_mipsx.s(1.98 KB)
📄 asm_ppc64x.s(3.34 KB)
📄 asm_riscv64.s(1.87 KB)
📄 asm_s390x.s(1.31 KB)
📄 asm_wasm.s(223 B)
📄 callbacks.go(3.95 KB)
📄 callbacks_aix.go(402 B)
📄 callbacks_traceback.go(475 B)
📄 cgo.go(939 B)
📄 dragonfly.go(485 B)
📄 freebsd.go(549 B)
📄 gcc_386.S(834 B)
📄 gcc_aix_ppc64.S(2.69 KB)
📄 gcc_aix_ppc64.c(1.29 KB)
📄 gcc_amd64.S(1.12 KB)
📄 gcc_android.c(2.58 KB)
📄 gcc_arm.S(1.12 KB)
📄 gcc_arm64.S(1.73 KB)
📄 gcc_context.c(529 B)
📄 gcc_darwin_amd64.c(1.32 KB)
📄 gcc_darwin_arm64.c(3.71 KB)
📄 gcc_dragonfly_amd64.c(1.32 KB)
📄 gcc_fatalf.c(469 B)
📄 gcc_freebsd_386.c(1.35 KB)
📄 gcc_freebsd_amd64.c(1.56 KB)
📄 gcc_freebsd_arm.c(1.65 KB)
📄 gcc_freebsd_arm64.c(1.41 KB)
📄 gcc_freebsd_sigaction.c(1.99 KB)
📄 gcc_libinit.c(3.2 KB)
📄 gcc_libinit_windows.c(3.95 KB)
📄 gcc_linux_386.c(1.5 KB)
📄 gcc_linux_amd64.c(2.46 KB)
📄 gcc_linux_arm.c(1.47 KB)
📄 gcc_linux_arm64.c(2.28 KB)
📄 gcc_linux_loong64.c(1.44 KB)
📄 gcc_linux_mips64x.c(1.5 KB)
📄 gcc_linux_mipsx.c(1.49 KB)
📄 gcc_linux_ppc64x.S(2.96 KB)
📄 gcc_linux_riscv64.c(1.44 KB)
📄 gcc_linux_s390x.c(1.41 KB)
📄 gcc_loong64.S(1.49 KB)
📄 gcc_mips64x.S(1.76 KB)
📄 gcc_mipsx.S(1.51 KB)
📄 gcc_mmap.c(881 B)
📄 gcc_netbsd_386.c(1.8 KB)
📄 gcc_netbsd_amd64.c(1.77 KB)
📄 gcc_netbsd_arm.c(1.85 KB)
📄 gcc_netbsd_arm64.c(1.84 KB)
📄 gcc_openbsd_386.c(1.32 KB)
📄 gcc_openbsd_amd64.c(1.29 KB)
📄 gcc_openbsd_arm.c(1.37 KB)
📄 gcc_openbsd_arm64.c(1.36 KB)
📄 gcc_openbsd_mips64.c(1.36 KB)
📄 gcc_ppc64x.c(1.43 KB)
📄 gcc_riscv64.S(1.56 KB)
📄 gcc_s390x.S(1.37 KB)
📄 gcc_setenv.c(553 B)
📄 gcc_sigaction.c(2.08 KB)
📄 gcc_signal2_ios_arm64.c(507 B)
📄 gcc_signal_ios_arm64.c(5.97 KB)
📄 gcc_signal_ios_nolldb.c(325 B)
📄 gcc_solaris_amd64.c(1.75 KB)
📄 gcc_traceback.c(1.49 KB)
📄 gcc_util.c(1.85 KB)
📄 gcc_windows_386.c(894 B)
📄 gcc_windows_amd64.c(910 B)
📄 gcc_windows_arm64.c(764 B)
📄 handle.go(3.61 KB)
📄 handle_test.go(1.82 KB)
📄 iscgo.go(646 B)
📄 libcgo.h(3.45 KB)
📄 libcgo_unix.h(604 B)
📄 libcgo_windows.h(258 B)
📄 linux.go(2.74 KB)
📄 linux_syscall.c(1.88 KB)
📄 mmap.go(1 KB)
📄 netbsd.go(546 B)
📄 openbsd.go(566 B)
📄 setenv.go(597 B)
📄 sigaction.go(877 B)
📄 signal_ios_arm64.go(270 B)
📄 signal_ios_arm64.s(1.8 KB)

Editing: gcc_darwin_arm64.c

// Copyright 2014 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 <limits.h>
#include <pthread.h>
#include <signal.h>
#include <string.h> /* for strerror */
#include <sys/param.h>
#include <unistd.h>
#include <stdlib.h>

#include "libcgo.h"
#include "libcgo_unix.h"

#include <TargetConditionals.h>

#if TARGET_OS_IPHONE
#include <CoreFoundation/CFBundle.h>
#include <CoreFoundation/CFString.h>
#endif

static void *threadentry(void*);
static void (*setg_gcc)(void*);

void
_cgo_sys_thread_start(ThreadStart *ts)
{
	pthread_attr_t attr;
	sigset_t ign, oset;
	pthread_t p;
	size_t size;
	int err;

//fprintf(stderr, "runtime/cgo: _cgo_sys_thread_start: fn=%p, g=%p\n", ts->fn, ts->g); // debug
	sigfillset(&ign);
	pthread_sigmask(SIG_SETMASK, &ign, &oset);

pthread_attr_init(&attr);
	pthread_attr_getstacksize(&attr, &size);
	// Leave stacklo=0 and set stackhi=size; mstart will do the rest.
	ts->g->stackhi = size;
	err = _cgo_try_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();
	}
}

extern void crosscall1(void (*fn)(void), void (*setg_gcc)(void*), void *g);
static void*
threadentry(void *v)
{
	ThreadStart ts;

ts = *(ThreadStart*)v;
	free(v);

#if TARGET_OS_IPHONE
	darwin_arm_init_thread_exception_port();
#endif

crosscall1(ts.fn, setg_gcc, (void*)ts.g);
	return nil;
}

#if TARGET_OS_IPHONE

// init_working_dir sets the current working directory to the app root.
// By default ios/arm64 processes start in "/".
static void
init_working_dir()
{
	CFBundleRef bundle = CFBundleGetMainBundle();
	if (bundle == NULL) {
		fprintf(stderr, "runtime/cgo: no main bundle\n");
		return;
	}
	CFURLRef url_ref = CFBundleCopyResourceURL(bundle, CFSTR("Info"), CFSTR("plist"), NULL);
	if (url_ref == NULL) {
		// No Info.plist found. It can happen on Corellium virtual devices.
		return;
	}
	CFStringRef url_str_ref = CFURLGetString(url_ref);
	char buf[MAXPATHLEN];
	Boolean res = CFStringGetCString(url_str_ref, buf, sizeof(buf), kCFStringEncodingUTF8);
	CFRelease(url_ref);
	if (!res) {
		fprintf(stderr, "runtime/cgo: cannot get URL string\n");
		return;
	}

// url is of the form "file:///path/to/Info.plist".
	// strip it down to the working directory "/path/to".
	int url_len = strlen(buf);
	if (url_len < sizeof("file://")+sizeof("/Info.plist")) {
		fprintf(stderr, "runtime/cgo: bad URL: %s\n", buf);
		return;
	}
	buf[url_len-sizeof("/Info.plist")+1] = 0;
	char *dir = &buf[0] + sizeof("file://")-1;

if (chdir(dir) != 0) {
		fprintf(stderr, "runtime/cgo: chdir(%s) failed\n", dir);
	}

// The test harness in go_ios_exec passes the relative working directory
	// in the GoExecWrapperWorkingDirectory property of the app bundle.
	CFStringRef wd_ref = CFBundleGetValueForInfoDictionaryKey(bundle, CFSTR("GoExecWrapperWorkingDirectory"));
	if (wd_ref != NULL) {
		if (!CFStringGetCString(wd_ref, buf, sizeof(buf), kCFStringEncodingUTF8)) {
			fprintf(stderr, "runtime/cgo: cannot get GoExecWrapperWorkingDirectory string\n");
			return;
		}
		if (chdir(buf) != 0) {
			fprintf(stderr, "runtime/cgo: chdir(%s) failed\n", buf);
		}
	}
}

#endif // TARGET_OS_IPHONE

void
x_cgo_init(G *g, void (*setg)(void*))
{
	pthread_attr_t attr;
	size_t size;

//fprintf(stderr, "x_cgo_init = %p\n", &x_cgo_init); // aid debugging in presence of ASLR
	setg_gcc = setg;
	pthread_attr_init(&attr);
	pthread_attr_getstacksize(&attr, &size);
	g->stacklo = (uintptr)&attr - size + 4096;
	pthread_attr_destroy(&attr);

#if TARGET_OS_IPHONE
	darwin_arm_init_mach_exception_handler();
	darwin_arm_init_thread_exception_port();
	init_working_dir();
#endif
}

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Editing: gcc_darwin_arm64.c

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