mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-12-25 04:23:42 +01:00
92 lines
2 KiB
Groff
92 lines
2 KiB
Groff
'\" t
|
|
.\" Manual page created with latex2man on Mon Mar 31 14:25:06 PST 2003
|
|
.\" NOTE: This file is generated, DO NOT EDIT.
|
|
.de Vb
|
|
.ft CW
|
|
.nf
|
|
..
|
|
.de Ve
|
|
.ft R
|
|
|
|
.fi
|
|
..
|
|
.TH "UNW\\_IS\\_SIGNAL\\_FRAME" "3" "31 March 2003" "Programming Library " "Programming Library "
|
|
.SH NAME
|
|
unw_is_signal_frame
|
|
\-\- check if current frame is a signal frame
|
|
.PP
|
|
.SH SYNOPSIS
|
|
|
|
.PP
|
|
#include <libunwind.h>
|
|
.br
|
|
.PP
|
|
int
|
|
unw_is_signal_frame(unw_cursor_t *cp);
|
|
.br
|
|
.PP
|
|
.SH DESCRIPTION
|
|
|
|
.PP
|
|
The unw_is_signal_frame()
|
|
routine returns a positive value
|
|
if the current frame identified by cp
|
|
is a signal frame, and a
|
|
value of 0 otherwise. For the purpose of this discussion, a signal
|
|
frame is a frame that was created in response to a potentially
|
|
asynchronous interruption. For UNIX and UNIX\-like platforms, such
|
|
frames are normally created by the kernel when delivering a signal.
|
|
In a kernel\-environment, a signal frame might, for example, correspond
|
|
to a frame created in response to a device interrupt.
|
|
.PP
|
|
Signal frames are somewhat unusual because the asynchronous nature of
|
|
the events that create them require storing the contents of registers
|
|
that are normally treated as scratch (``caller\-saved\&'') registers.
|
|
.PP
|
|
.SH RETURN VALUE
|
|
|
|
.PP
|
|
On successful completion, unw_is_signal_frame()
|
|
returns a
|
|
positive value if the current frame is a signal frame, or 0 if it is
|
|
not. Otherwise, a negative value of one of the error\-codes below is
|
|
returned.
|
|
.PP
|
|
.SH THREAD AND SIGNAL SAFETY
|
|
|
|
.PP
|
|
unw_is_signal_frame()
|
|
is thread\-safe as well as safe to use
|
|
from a signal handler.
|
|
.PP
|
|
.SH ERRORS
|
|
|
|
.PP
|
|
.TP
|
|
UNW_ENOINFO
|
|
Libunwind
|
|
is unable to determine
|
|
whether or not the current frame is a signal frame.
|
|
.PP
|
|
.SH SEE ALSO
|
|
|
|
.PP
|
|
libunwind(3),
|
|
unw_get_reg(3),
|
|
unw_set_reg(3),
|
|
unw_get_fpreg(3),
|
|
unw_set_fpreg(3)
|
|
.PP
|
|
.SH AUTHOR
|
|
|
|
.PP
|
|
David Mosberger\-Tang
|
|
.br
|
|
Hewlett\-Packard Labs
|
|
.br
|
|
Palo\-Alto, CA 94304
|
|
.br
|
|
Email: \fBdavidm@hpl.hp.com\fP
|
|
.br
|
|
WWW: \fBhttp://www.hpl.hp.com/research/linux/libunwind/\fP\&.
|
|
.\" NOTE: This file is generated, DO NOT EDIT.
|