mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-12-27 21:43:42 +01:00
107 lines
2.2 KiB
Groff
107 lines
2.2 KiB
Groff
'\" t
|
|
.\" Manual page created with latex2man on Sat Feb 8 01:21:05 PST 2003
|
|
.\" NOTE: This file is generated, DO NOT EDIT.
|
|
.de Vb
|
|
.ft CW
|
|
.nf
|
|
..
|
|
.de Ve
|
|
.ft R
|
|
|
|
.fi
|
|
..
|
|
.TH "UNW\\_RESUME" "3" "08 February 2003" "Programming Library " "Programming Library "
|
|
.SH NAME
|
|
|
|
.PP
|
|
unw_resume \-\- resume execution in a particular stack frame
|
|
.PP
|
|
.SH SYNOPSIS
|
|
|
|
.PP
|
|
#include <libunwind.h>
|
|
.br
|
|
.PP
|
|
int
|
|
unw_resume(unw_cursor_t *cursor);
|
|
.br
|
|
.PP
|
|
.SH DESCRIPTION
|
|
|
|
.PP
|
|
The unw_resume()
|
|
routine resumes execution at the stack frame
|
|
identified by cursor\&.
|
|
Normally, this is accomplished by
|
|
restoring the ``preserved\&'' (callee\-saved) machine state. However, if
|
|
execution in any of the stack frames younger (more deeply nested) than
|
|
the one identified by cursor
|
|
was interrupted by a signal, then
|
|
unw_resume()
|
|
will restore the entire machine state, including
|
|
the ``preserved\&'' and ``scratch\&'' (caller\-saved) registers, as well as
|
|
the signal mask.
|
|
.PP
|
|
Most platforms reserve some registers to pass arguments to exception
|
|
handlers (e.g., IA\-64 uses r15\-r18
|
|
for this
|
|
purpose). These registers are normally treated like ``scratch\&''
|
|
registers. However, if libunwind
|
|
is used to define an
|
|
exception argument register, e.g., by calling unw_set_reg(),
|
|
then unw_resume()
|
|
will always install the new value as the
|
|
contents of that register. In other words, the exception handling
|
|
arguments are installed even in cases where normally only the
|
|
``preserved\&'' registers are restored.
|
|
.PP
|
|
.SH RETURN VALUE
|
|
|
|
.PP
|
|
For local unwinding, unw_resume()
|
|
does not return on success.
|
|
For remote unwinding, it returns 0 on success. On failure, the
|
|
negative value of one of the errors below is returned.
|
|
.PP
|
|
.SH ERRORS
|
|
|
|
.PP
|
|
.TP
|
|
UNW_EUNSPEC
|
|
An unspecified error occurred.
|
|
.TP
|
|
UNW_EBADREG
|
|
A register needed by unw_resume()
|
|
wasn\&'t
|
|
accessible.
|
|
.TP
|
|
UNW_EINVALIDIP
|
|
The instruction pointer identified by
|
|
cursor
|
|
is not valid.
|
|
.TP
|
|
UNW_BADFRAME
|
|
The stack frame identified by
|
|
cursor
|
|
is not valid.
|
|
.PP
|
|
.SH SEE ALSO
|
|
|
|
.PP
|
|
libunwind(3),
|
|
unw_set_reg(3),
|
|
sigprocmask(2)
|
|
.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.
|