mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-12-25 04:23:42 +01:00
205 lines
4.6 KiB
Groff
205 lines
4.6 KiB
Groff
'\" t
|
|
.\" Manual page created with latex2man on Mon Mar 31 14:18:02 PST 2003
|
|
.\" NOTE: This file is generated, DO NOT EDIT.
|
|
.de Vb
|
|
.ft CW
|
|
.nf
|
|
..
|
|
.de Ve
|
|
.ft R
|
|
|
|
.fi
|
|
..
|
|
.TH "UNW\\_GET\\_PROC\\_INFO" "3" "31 March 2003" "Programming Library " "Programming Library "
|
|
.SH NAME
|
|
unw_get_proc_info
|
|
\-\- get info on current procedure
|
|
.PP
|
|
.SH SYNOPSIS
|
|
|
|
.PP
|
|
#include <libunwind.h>
|
|
.br
|
|
.PP
|
|
int
|
|
unw_get_proc_info(unw_cursor_t *cp,
|
|
unw_proc_info_t *pip);
|
|
.br
|
|
.PP
|
|
.SH DESCRIPTION
|
|
|
|
.PP
|
|
The unw_get_proc_info()
|
|
routine returns auxiliary
|
|
information about the procedure that created the stack frame
|
|
identified by argument cp\&.
|
|
The pip
|
|
argument is a pointer
|
|
to a structure of type unw_proc_info_t
|
|
which is used to
|
|
return the information. The unw_proc_info_t
|
|
has the
|
|
following members:
|
|
.TP
|
|
unw_word_t start_ip
|
|
The address of the first
|
|
instruction of the procedure. If this address cannot be determined
|
|
(e.g., due to lack of unwind information), the start_ip
|
|
member is cleared to 0.
|
|
.br
|
|
.TP
|
|
unw_word_t end_ip
|
|
The address of the first
|
|
instruction \fIbeyond\fP
|
|
the end of the procedure. If this address
|
|
cannot be determined (e.g., due to lack of unwind information),
|
|
the end_ip
|
|
member is cleared to 0.
|
|
.br
|
|
.TP
|
|
unw_word_t lsda
|
|
The address of the
|
|
language\-specific data\-area (LSDA). This area normally contains
|
|
language\-specific information needed during exception handling. If
|
|
the procedure has no such area, this member is cleared to 0.
|
|
.br
|
|
.TP
|
|
unw_word_t handler
|
|
The address of the exception
|
|
handler routine. This is sometimes called the \fIpersonality\fP
|
|
routine. If the procedure does not define
|
|
a personality routine, the handler
|
|
member is cleared to 0.
|
|
.br
|
|
.TP
|
|
unw_word_t gp
|
|
The global\-pointer of the
|
|
procedure. On platforms that do not use a global pointer, this
|
|
member may contain an undefined value. On all other platforms, it
|
|
must be set either to the correct global\-pointer value of the
|
|
procedure or to 0 if the proper global\-pointer cannot be
|
|
obtained for some reason.
|
|
.br
|
|
.TP
|
|
unw_word_t flags
|
|
A set of flags. There are
|
|
currently no target\-independent flags. For the IA\-64 target, the
|
|
flag UNW_PI_FLAG_IA64_RBS_SWITCH
|
|
is set if the
|
|
procedure may switch the register\-backing store.
|
|
.br
|
|
.TP
|
|
int format
|
|
The format of the unwind\-info for this
|
|
procedure. If the unwind\-info consists of dynamic procedure info,
|
|
format
|
|
is equal to UNW_INFO_FORMAT_DYNAMIC\&.
|
|
If the
|
|
unwind\-info consists of a (target\-specific) unwind table, it is
|
|
equal to to UNW_INFO_FORMAT_TABLE\&.
|
|
All other values are
|
|
reserved for future use by libunwind\&.
|
|
This member exists
|
|
for use by the find_proc_info()
|
|
call\-back (see
|
|
unw_create_addr_space(3)).
|
|
The
|
|
unw_get_proc_info()
|
|
routine
|
|
may return an undefined value in this member.
|
|
.br
|
|
.TP
|
|
int unwind_info_size
|
|
The size of the unwind\-info
|
|
in bytes. This member exists for use by the
|
|
find_proc_info()
|
|
call\-back (see
|
|
unw_create_addr_space(3)).
|
|
The
|
|
unw_get_proc_info()
|
|
routine
|
|
may return an undefined value in this member.
|
|
.br
|
|
.TP
|
|
void *unwind_info
|
|
The pointer to the unwind\-info.
|
|
If no unwind info is available, this member must be set to
|
|
NULL\&.
|
|
This member exists for use by the
|
|
find_proc_info()
|
|
call\-back (see
|
|
unw_create_addr_space(3)).
|
|
The
|
|
unw_get_proc_info()
|
|
routine
|
|
may return an undefined value in this member.
|
|
.br
|
|
.PP
|
|
Note that for the purposes of libunwind,
|
|
the code of a
|
|
procedure is assumed to occupy a single, contiguous range of
|
|
addresses. For this reason, it is alwas possible to describe the
|
|
extent of a procedure with the start_ip
|
|
and end_ip
|
|
members. If a single function/routine is split into multiple,
|
|
discontiguous pieces, libunwind
|
|
will treat each piece as a
|
|
separate procedure.
|
|
.PP
|
|
.SH RETURN VALUE
|
|
|
|
.PP
|
|
On successful completion, unw_get_proc_info()
|
|
returns 0.
|
|
Otherwise the negative value of one of the error\-codes below is
|
|
returned.
|
|
.PP
|
|
.SH THREAD AND SIGNAL SAFETY
|
|
|
|
.PP
|
|
unw_get_proc_info()
|
|
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
|
|
unwind\-info for the procedure.
|
|
.TP
|
|
UNW_EBADVERSION
|
|
The unwind\-info for the procedure has
|
|
version or format that is not understood by libunwind\&.
|
|
.PP
|
|
In addition, unw_get_proc_info()
|
|
may return any error
|
|
returned by the access_mem()
|
|
call\-back (see
|
|
unw_create_addr_space(3)).
|
|
.PP
|
|
.SH SEE ALSO
|
|
|
|
.PP
|
|
libunwind(3),
|
|
unw_create_addr_space(3),
|
|
unw_get_proc_name(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.
|