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Diffstat (limited to 'rtemstoolkit/elftoolchain/libdwarf/dwarf_get_fde_info_for_all_regs3.3')
| -rw-r--r-- | rtemstoolkit/elftoolchain/libdwarf/dwarf_get_fde_info_for_all_regs3.3 | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/rtemstoolkit/elftoolchain/libdwarf/dwarf_get_fde_info_for_all_regs3.3 b/rtemstoolkit/elftoolchain/libdwarf/dwarf_get_fde_info_for_all_regs3.3 new file mode 100644 index 0000000..841d983 --- /dev/null +++ b/rtemstoolkit/elftoolchain/libdwarf/dwarf_get_fde_info_for_all_regs3.3 @@ -0,0 +1,183 @@ +.\" Copyright (c) 2011 Kai Wang +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" $Id: dwarf_get_fde_info_for_all_regs3.3 2071 2011-10-27 03:20:00Z jkoshy $ +.\" +.Dd June 26, 2011 +.Os +.Dt DWARF_GET_FDE_INFO_FOR_ALL_REGS3 3 +.Sh NAME +.Nm dwarf_get_fde_info_for_all_regs3 +.Nd retrieve register rule row +.Sh LIBRARY +.Lb libdwarf +.Sh SYNOPSIS +.In libdwarf.h +.Ft int +.Fo dwarf_get_fde_info_for_all_regs3 +.Fa "Dwarf_Fde fde" +.Fa "Dwarf_Addr pc" +.Fa "Dwarf_Regtable3 *reg_table" +.Fa "Dwarf_Addr *row_pc" +.Fa "Dwarf_Error *err" +.Fc +.Sh DESCRIPTION +Function +.Fn dwarf_get_fde_info_for_all_regs3 +retrieves a row from the register rule table associated with the given +FDE descriptor. +.Pp +Argument +.Ar fde +should reference a valid DWARF FDE descriptor. +.Pp +Argument +.Ar pc +should hold the program counter address to be used to locate the +desired table row. +.Pp +Argument +.Ar reg_table +should point to a +.Vt Dwarf_Regtable3 +descriptor which will hold the returned table row of register rules. +The +.Vt Dwarf_Regtable3 +descriptor is defined in the header file +.In libdwarf.h : +.Bd -literal -offset indent +typedef struct { + Dwarf_Small dw_offset_relevant; + Dwarf_Small dw_value_type; + Dwarf_Half dw_regnum; + Dwarf_Unsigned dw_offset_or_block_len; + Dwarf_Ptr dw_block_ptr; +} Dwarf_Regtable_Entry3; + +typedef struct { + Dwarf_Regtable_Entry3 rt3_cfa_rule; + Dwarf_Half rt3_reg_table_size; + Dwarf_Regtable_Entry3 *rt3_rules; +} Dwarf_Regtable3; +.Ed +.Pp +The +.Va rt3_reg_table_size +field specifies the maximum number of register rule columns to be +returned, and should be set by the application before calling the +function. +The +.Va rt3_rules +field should point to a memory arena allocated by the application with +space for at least +.Vt rt3_reg_table_size +descriptors of type +.Vt Dwarf_Regtable_Entry3 . +.Pp +On a successful execution of this function, the +.Va rt3_cfa_rule +field will be set to the CFA register rule associated with the table +row, and the +.Va rt3_rules +array will hold the returned register rules contained in the table row. +.Pp +For each register rule descriptor returned, +the +.Va dw_offset_relevant +field will be set to 1 if the register rule has a offset value, +the +.Va dw_value_type +field will be set to the type code of the register rule and the +.Va dw_regnum +field will be set to the register number associated with the register rule. +If the register rule is of type +.Dv DW_EXPR_OFFSET +or +.Dv DW_EXPR_VAL_OFFSET , +the +.Va dw_offset_or_block_len +field will be set to the offset value associated with the register rule. +If the type is +.Dv DW_EXPR_EXPRESSION +or +.Dv DW_EXPR_VAL_EXPRESSION , +the +.Va dw_offset_or_block_len +field will be set to the length in bytes of the DWARF expression block +associated with the register rule. +The +.Va dw_block_ptr +field will be set to a pointer to the content of the DWARF expression block +associated with the register rule. +.Pp +Argument +.Ar row_pc +should point to a location which will be set to the lowest program +counter address associated with the table row. +.Pp +If argument +.Ar err +is not NULL, it will be used to store error information in case of an +error. +.Sh RETURN VALUES +Function +.Fn dwarf_get_fde_info_for_all_regs3 +returns +.Dv DW_DLV_OK +when it succeeds. +In case of an error, it returns +.Dv DW_DLV_ERROR +and sets the argument +.Ar err . +.Sh ERRORS +Function +.Fn dwarf_get_fde_info_for_all_regs3 +can fail with: +.Bl -tag -width ".Bq Er DW_DLE_PC_NOT_IN_FDE_RANGE" +.It Bq Er DW_DLE_ARGUMENT +One of the arguments +.Ar fde , +.Ar reg_table +or +.Ar row_pc +was NULL. +.It Bq Er DW_DLE_PC_NOT_IN_FDE_RANGE +The program counter value provided in argument +.Ar pc +did not fall in the range covered by argument +.Ar fde . +.El +.Sh SEE ALSO +.Xr dwarf 3 , +.Xr dwarf_get_fde_at_pc 3 , +.Xr dwarf_get_fde_info_for_all_regs 3 , +.Xr dwarf_get_fde_info_for_cfa_reg3 3 , +.Xr dwarf_get_fde_info_for_reg 3 , +.Xr dwarf_get_fde_info_for_reg3 3 , +.Xr dwarf_get_fde_n 3 , +.Xr dwarf_set_frame_cfa_value 3 , +.Xr dwarf_set_frame_rule_table_size 3 , +.Xr dwarf_set_frame_rule_initial_value 3 , +.Xr dwarf_set_frame_same_value 3 , +.Xr dwarf_set_frame_undefined_value 3 |