Russ Cox 01f05d8ff1 runtime: unify asmcgocall and systemstack traceback setup ... Both asmcgocall and systemstack need to save the calling Go code's context for use by traceback, but they do it differently. Systemstack's appraoch is better, because it doesn't require a special case in traceback. So make them both use that. While we are here, the fake mstart caller in systemstack is no longer needed and can be removed. (traceback knows to stop in systemstack because of the writes to SP.) Also remove the fake mstarts in sys_windows_*.s. And while we are there, fix the control flow guard code in sys_windows_arm.s. The current code is using pointers to a stack frame that technically is gone once we hit the RET instruction. Clearly it's working OK, but better not to depend on data below SP being preserved, even for just a few instructions. Store the value we need in other registers instead. (This code is only used for pushing a sigpanic call, which does not actually return to the site of the fault and therefore doesn't need to preserve any of the registers.) This CL is part of a stack adding windows/arm64 support (#36439), intended to land in the Go 1.17 cycle. This CL is, however, not windows/arm64-specific. It is cleanup meant to make the port (and future ports) easier. Change-Id: Id1e3ef5e54f7ad786e4b87043f2626eba7c3bbd9 Reviewed-on: https://go-review.googlesource.com/c/go/+/288799 Trust: Russ Cox <rsc@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>		2021-02-19 00:02:06 +00:00
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testdata	cmd/dist,cmd/go,runtime: add support for cgo on linux/riscv64	2020-11-03 12:59:51 +00:00
backdoor.go
buildid_linux.go
callback_c_gc.c
callback_c_gccgo.c
callback_c.c
callback.go	runtime: unify asmcgocall and systemstack traceback setup	2021-02-19 00:02:06 +00:00
cgo_linux_test.go	syscall: support POSIX semantics for Linux syscalls	2020-10-23 20:53:14 +00:00
cgo_stubs_android_test.go
cgo_test.go	misc/cgo/test: test C.enum_*	2020-10-27 18:13:59 +00:00
cgo_thread_lock.go
cgo_unix_test.go
cthread_unix.c
cthread_windows.c
issue1435.go	syscall: improve TestSetuidEtc() /proc/ parsing against races	2020-11-11 20:49:53 +00:00
issue4029.c	cmd/link: support cgo internal/linking on darwin/arm64	2020-10-20 02:25:52 +00:00
issue4029.go	cmd/link: support cgo internal/linking on darwin/arm64	2020-10-20 02:25:52 +00:00
issue4029w.go	cmd/link: support cgo internal/linking on darwin/arm64	2020-10-20 02:25:52 +00:00
issue4273.c
issue4273b.c
issue4339.c
issue4339.h
issue5548_c.c
issue5740a.c
issue5740b.c
issue6833_c.c
issue6907export_c.c
issue6997_linux.c
issue6997_linux.go
issue7234_test.go
issue8148.go
issue8331.h
issue8517_windows.c
issue8517_windows.go
issue8517.go
issue8694.go
issue8811.c
issue18146.go	all: add GOOS=ios	2020-09-23 18:12:59 +00:00
issue20910.c
issue21897.go
issue21897b.go
issue31891.c
issue42495.go	cmd/cgo: fix initialization of empty argument types	2020-11-13 15:15:15 +00:00
overlaydir_test.go
pkg_test.go	misc/cgo/test: enable TestCrossPackageTests on darwin/arm64	2020-12-30 22:39:48 +00:00
setgid_linux.go
sigaltstack.go	runtime: use sigaltstack on macOS/ARM64	2020-10-06 21:25:42 +00:00
sigprocmask.c
sigprocmask.go
test_unix.go
test_windows.go
test.go	misc/cgo/test: test C.enum_*	2020-10-27 18:13:59 +00:00
testx.go	all: add GOOS=ios	2020-09-23 18:12:59 +00:00