mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-16 13:18:12 +01:00
109 lines
2 KiB
Groff
109 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\\_STEP" "3" "31 March 2003" "Programming Library " "Programming Library "
|
|
.SH NAME
|
|
unw_step
|
|
\-\- advance to next stack frame
|
|
.PP
|
|
.SH SYNOPSIS
|
|
|
|
.PP
|
|
#include <libunwind.h>
|
|
.br
|
|
.PP
|
|
int
|
|
unw_step(unw_cursor_t *cp);
|
|
.br
|
|
.PP
|
|
.SH DESCRIPTION
|
|
|
|
.PP
|
|
The unw_step()
|
|
routine advances the unwind cursor cp
|
|
to
|
|
the next older, less deeply nested stack frame.
|
|
.PP
|
|
.SH RETURN VALUE
|
|
|
|
.PP
|
|
On successful completion, unw_step()
|
|
returns a positive value
|
|
if there are more stack frames in the call\-chain, or 0 if the returned
|
|
stack frame is the last frame in the chain. On error, the negative
|
|
value of one of the error\-codes below is returned.
|
|
.PP
|
|
.SH THREAD AND SIGNAL SAFETY
|
|
|
|
.PP
|
|
unw_step()
|
|
is thread\-safe as well as safe to use
|
|
from a signal handler.
|
|
.PP
|
|
.SH ERRORS
|
|
|
|
.PP
|
|
.TP
|
|
UNW_EUNSPEC
|
|
An unspecified error occurred.
|
|
.TP
|
|
UNW_ENOINFO
|
|
Libunwind
|
|
was unable to locate the
|
|
unwind\-info needed to complete the operation.
|
|
.TP
|
|
UNW_EBADVERSION
|
|
The unwind\-info needed to complete the
|
|
operation has a version or a format that is not understood by
|
|
libunwind\&.
|
|
.TP
|
|
UNW_EINVALIDIP
|
|
The instruction\-pointer
|
|
(``program\-counter\&'') of the next stack frame is invalid (e.g., not
|
|
properly aligned).
|
|
.TP
|
|
UNW_EBADFRAME
|
|
The next stack frame is invalid.
|
|
.TP
|
|
UNW_ESTOPUNWIND
|
|
Returned if a call to
|
|
find_proc_info()
|
|
returned \-UNW_ESTOPUNWIND\&.
|
|
.PP
|
|
In addition, unw_step()
|
|
may return any error returned by the
|
|
find_proc_info(),
|
|
get_dyn_info_list_addr(),
|
|
access_mem(),
|
|
access_reg(),
|
|
or access_fpreg()
|
|
call\-backs (see unw_create_addr_space(3)).
|
|
.PP
|
|
.SH SEE ALSO
|
|
|
|
.PP
|
|
libunwind(3),
|
|
unw_create_addr_space(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.
|