mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-28 18:07:37 +01:00
138 lines
2.9 KiB
Groff
138 lines
2.9 KiB
Groff
|
'\" t
|
||
|
|
.\" Manual page created with latex2man on Wed Aug 16 11:09:44 PDT 2017
|
||
|
|
.\" NOTE: This file is generated, DO NOT EDIT.
|
||
|
|
.de Vb
|
||
|
|
.ft CW
|
||
|
|
.nf
|
||
|
|
..
|
||
|
|
.de Ve
|
||
|
|
.ft R
|
||
|
|
|
||
|
|
.fi
|
||
|
|
..
|
||
|
|
.TH "UNW\\_REG\\_STATES\\_ITERATE" "3" "16 August 2017" "Programming Library " "Programming Library "
|
||
|
|
.SH NAME
|
||
|
|
unw_reg_states_iterate
|
||
|
|
\-\- get register state info on current procedure
|
||
|
|
.PP
|
||
|
|
.SH SYNOPSIS
|
||
|
|
|
||
|
|
.PP
|
||
|
|
#include <libunwind.h>
|
||
|
|
.br
|
||
|
|
.PP
|
||
|
|
int
|
||
|
|
unw_reg_states_iterate(unw_cursor_t *cp,
|
||
|
|
unw_reg_states_callbackcb,
|
||
|
|
void *token);
|
||
|
|
.br
|
||
|
|
.PP
|
||
|
|
.SH DESCRIPTION
|
||
|
|
|
||
|
|
.PP
|
||
|
|
The unw_reg_states_iterate()
|
||
|
|
routine provides
|
||
|
|
information about the procedure that created the stack frame
|
||
|
|
identified by argument cp\&.
|
||
|
|
The cb
|
||
|
|
argument is a pointer
|
||
|
|
to a function of type unw_reg_states_callback
|
||
|
|
which is used to
|
||
|
|
return the information. The function unw_reg_states_callback
|
||
|
|
has the
|
||
|
|
following definition:
|
||
|
|
.PP
|
||
|
|
int
|
||
|
|
( *unw_reg_states_callback)(void *token,
|
||
|
|
void *reg_states_data,
|
||
|
|
size_t
|
||
|
|
reg_states_data_size,
|
||
|
|
unw_word_t
|
||
|
|
start_ip,
|
||
|
|
unw_word_t
|
||
|
|
end_ip);
|
||
|
|
.PP
|
||
|
|
The callback function may be invoked several times for each call of unw_reg_states_iterate\&.
|
||
|
|
Each call is associcated with a instruction address range and a set of instructions on how to update register values when returning from the procedure in that address range. For each invocation, the arguments to the callback function are:
|
||
|
|
.TP
|
||
|
|
void * token
|
||
|
|
The token value passed to unw_reg_states_callback\&.
|
||
|
|
.br
|
||
|
|
.TP
|
||
|
|
void * reg_states_data
|
||
|
|
A pointer to data about
|
||
|
|
updating register values. This data, or a copy of it, can be passed
|
||
|
|
to unw_apply_reg_state\&.
|
||
|
|
.br
|
||
|
|
.TP
|
||
|
|
int reg_states_data_size
|
||
|
|
The size of the register update data.
|
||
|
|
.br
|
||
|
|
.TP
|
||
|
|
unw_word_t start_ip
|
||
|
|
The address of the first
|
||
|
|
instruction of the address range.
|
||
|
|
.br
|
||
|
|
.TP
|
||
|
|
unw_word_t end_ip
|
||
|
|
The address of the first
|
||
|
|
instruction \fIbeyond\fP
|
||
|
|
the end of the address range.
|
||
|
|
.br
|
||
|
|
.PP
|
||
|
|
.SH RETURN VALUE
|
||
|
|
|
||
|
|
.PP
|
||
|
|
On successful completion, unw_reg_states_iterate()
|
||
|
|
returns
|
||
|
|
0. If the callback function returns a nonzero value, that indicates
|
||
|
|
failure and the function returns immediately. Otherwise the negative
|
||
|
|
value of one of the error\-codes below is returned.
|
||
|
|
.PP
|
||
|
|
.SH THREAD AND SIGNAL SAFETY
|
||
|
|
|
||
|
|
.PP
|
||
|
|
unw_reg_states_iterate()
|
||
|
|
is thread\-safe. If cursor cp
|
||
|
|
is
|
||
|
|
in the local address\-space, this routine is also 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_reg_states_iterate()
|
||
|
|
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_apply_reg_state(3)
|
||
|
|
.PP
|
||
|
|
.SH AUTHOR
|
||
|
|
|
||
|
|
.PP
|
||
|
|
David Mosberger\-Tang
|
||
|
|
.br
|
||
|
|
Email: \fBdmosberger@gmail.com\fP
|
||
|
|
.br
|
||
|
|
WWW: \fBhttp://www.nongnu.org/libunwind/\fP\&.
|
||
|
|
.\" NOTE: This file is generated, DO NOT EDIT.
|