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newlib/winsup/cygwin/include/sys/ucontext.h

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Provide ucontext to signal handlers Add ucontext.h header, defining ucontext_t and mcontext_t types. Provide sigaction sighandlers with a ucontext_t parameter, containing stack and context information. * include/sys/ucontext.h : New header. * include/ucontext.h : Ditto. * exceptions.cc (call_signal_handler): Provide ucontext_t parameter to signal handler function. Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
2015-03-30 21:31:13 +02:00
/* ucontext.h
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#ifndef _SYS_UCONTEXT_H_
#define _SYS_UCONTEXT_H_
#include <signal.h>
typedef struct __mcontext mcontext_t;
headers: avoid bareword attributes Always use the __-decorated form of an attribute name in public headers, as the bareword form is in the user's namespace, and we don't want compilation to break just because the user defines the bareword to mean something else. Signed-off-by: Eric Blake <eblake@redhat.com>
2017-08-17 03:39:18 +02:00
typedef __attribute__ ((__aligned__ (16))) struct __ucontext {
Try to make sure struct _mcontext is 16-byte aligned On x86_64, RtlCaptureContext() uses fxsave to save FPU/MMX/SSE state. fxsave requires that the destination address is 16-byte aligned, or it will fault. CONTEXT is already annotated __attribute__ ((aligned (16))), do the same with struct _mcontext. Rearrange ucontext_t so that it's struct _mcontext element is also correctly aligned. * include/cygwin/signal.h (struct __mcontext): 16-byte align. * include/sys/ucontext.h (ucontext_t): Ditto. Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
2015-04-02 19:05:32 +02:00
mcontext_t uc_mcontext;
Provide ucontext to signal handlers Add ucontext.h header, defining ucontext_t and mcontext_t types. Provide sigaction sighandlers with a ucontext_t parameter, containing stack and context information. * include/sys/ucontext.h : New header. * include/ucontext.h : Ditto. * exceptions.cc (call_signal_handler): Provide ucontext_t parameter to signal handler function. Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
2015-03-30 21:31:13 +02:00
struct __ucontext *uc_link;
sigset_t uc_sigmask;
stack_t uc_stack;
unsigned long int uc_flags;
} ucontext_t;
#endif /* !_SYS_UCONTEXT_H_ */