Eliminate use of sigframe and sigthread throughout.

* Makefile.in (DLL_OFILES): Add sigfe.o.  Remove reliance on cygwin.def from
cygwin0.dll dependency since dependence on sigfe.o implies that.  Generate def
file on the fly using 'gendef'.
* configure.in: Don't auto-generate cygwin.def.
* configure: Regenerate.
* cygwin.din: Add SIGFE stuff where appropriate.
* dcrt0.cc (dll_crt0_1): Initialize cygwin tls early in process startup.  Set
_main_tls to address of the main thread's cygwin tls.
* debug.h: Remove now unneeded WFSO and WFMO declarations.
* exceptions.cc (_last_thread): Define.
(set_thread_state_for_signals): New function.
(reset_thread_exception_for_signals): Ditto.
(init_thread_for_signals): Ditto.
(delete_thread_for_signals): Ditto.
(capture_thread_for_signals): Ditto.
(handle_exceptions): Set return address explicitly for exceptions prior to
calling sig_send.
(interrupt_on_return): Eliminate.
(setup_handler): Add preliminary implementation for dealing with
thread-specific signals by querying _main_tls.
(signal_exit): Use cygthread::main_thread_id instead of mainthread.id.
(call_signal_handler_now): For now, just handle the main thread.
* fork.cc (vfork): Save and restore main _my_tls.
* gendef: New file.  Generates def file and sigfe.s file.
* gentls_offsets: New file.  Generates offsets for perl to use in sigfe.s.
* how-signals-work.txt: Mention that info is obsolete.
* init.cc (dll_entry): Initialize cygwin tls storage here.
* miscfuncs.cc (low_priority_sleep): Make a C function for easier calling from
asm.
* perthread.h (vfork_save::tls): New element.
* signal.cc (nanosleep): Replace previous use of
sigframe.call_signal_handler_now with straight call to call_signal_handler_now.
(abort): Ditto.
* syscalls.cc (readv): Ditto.
* termios.cc (tcsetattr): Ditto.
* wait.cc (wait4): Ditto.
* sigproc.cc (sig_dispatch_pending): Ditto.
(sig_send): Ditto.
* sigproc.h: Declare call_signal_handler_now.
* thread.cc (pthread::thread_init_wrapper): Initialize cygwin tls.  Remove
obsolete and unworking signal stuff.
* thread.h (verifyable_object::sigs): Eliminate.
(verifyable_object::sigmask): Eliminate.
(verifyable_object::sigtodo): Eliminate.
(verifyable_object::exit): Make attribute noreturn.
(verifyable_object::thread_init_wrapper): Ditto.
(pthread_null::exit): Ditto.
* winbase.h (__stackbase): Always define.
* winsup.h (low_priority_sleep): Declare as a "C" function.
* include/cygwin/version.h: Bump API version to reflect sigwait export.
* include/sys/queue.h: Protect SLIST_ENTRY from previous declaration.
* signal.cc (sigwait): Implement.
* select.cc (fhandler_base::ready_for_read): Add debugging output.
* devices.h: Define more device pointers via their storage.
* devices.in: Don't parse things like /dev/inet/tcp, as they really have no
meaning.
* devices.cc: Regenerate.
* gendevices: Set proper protection for output file.
* cygtls.h: New file.
* gendef: New file.
* gentls_offsets: New file.
* tlsoffsets.h: New file.  Autogenerated.
* config/i386/longjmp.c: Remove.  File subsumed by gendef output.
* config/i386/makefrag: Remove obsolete file.
* fhandler.cc: Remove spurious access_worker declaration.
* spawn.cc (spawnve): Make debugging output more accurate.
* cygwin-gperf: Remove.
* devices.cc: Remove.

1 files changed, 61 insertions, 0 deletions

diff --git a/winsup/cygwin/cygtls.h b/winsup/cygwin/cygtls.h
new file mode 100644
index 000000000..8f900e9f0
--- /dev/null
+++ b/winsup/cygwin/cygtls.h
@@ -0,0 +1,61 @@
+/* cygtls.h
+
+   Copyright 2003 Red Hat, Inc.
+
+This software is a copyrighted work licensed under the terms of the
+Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
+details. */
+
+#ifndef _CYGTLS_H
+#define _CYGTLS_H
+
+#include <cygwin/signal.h>
+
+#define CYGTLS_INITIALIZED 0x43227
+#define CYGTLS_EXCEPTION (0x43227 + true)
+
+/* Please keep this file simple.  Changes to the below structure may require
+   acompanying changes to the very simple parser in the perl script
+   'gentls_offsets'.  */
+
+#pragma pack(push,4)
+typedef __uint32_t __stack_t;
+struct _threadinfo
+{
+  void (*func) /*gentls_offsets*/(int)/*gentls_offsets*/;
+  int saved_errno;
+  int sa_flags;
+  sigset_t oldmask;
+  sigset_t newmask;
+  HANDLE event;
+  int *errno_addr;
+  unsigned initialized;
+  sigset_t sigmask;
+  sigset_t sigwait_mask;
+  siginfo_t *sigwait_info;
+  siginfo_t infodata;
+  void *tid;
+  struct _threadinfo *prev, *next;
+  __stack_t stack[8];
+  int sig;
+  __stack_t *stackptr;
+
+  struct _threadinfo *init (void *, void * = NULL);
+  void remove ();
+  void push (__stack_t, bool = false);
+  __stack_t pop ();
+  bool isinitialized () {return initialized == CYGTLS_INITIALIZED || initialized == CYGTLS_EXCEPTION;}
+  void set_state (bool);
+  void reset_exception ();
+  bool interrupt_now (CONTEXT *, int, void *, struct sigaction&)
+    __attribute__((regparm(3)));
+  void __stdcall interrupt_setup (int sig, void *handler, struct sigaction& siga, __stack_t retaddr)
+    __attribute__((regparm(3)));
+};
+#pragma pack(pop)
+
+extern _threadinfo *_tlsbase __asm__ ("%fs:4");
+#define _my_tls (_tlsbase[-1])
+
+#define CYGTLS_PADSIZE (sizeof (_threadinfo) + 64)
+#endif /*_CYGTLS_H*/