NAME
dwarf_set_frame_cfa_value,
dwarf_set_frame_rule_initial_value,
dwarf_set_frame_rule_table_size,
dwarf_set_frame_same_value,
dwarf_set_frame_undefined_value —
set
internal register rule table parameters
LIBRARY
DWARF Access Library (libdwarf, -ldwarf)
SYNOPSIS
#include <libdwarf.h>
Dwarf_Half
dwarf_set_frame_cfa_value(
Dwarf_Debug
dbg,
Dwarf_Half value);
Dwarf_Half
dwarf_set_frame_rule_initial_value(
Dwarf_Debug
dbg,
Dwarf_Half value);
Dwarf_Half
dwarf_set_frame_rule_table_size(
Dwarf_Debug
dbg,
Dwarf_Half value);
Dwarf_Half
dwarf_set_frame_same_value(
Dwarf_Debug
dbg,
Dwarf_Half value);
Dwarf_Half
dwarf_set_frame_undefined_value(
Dwarf_Debug
dbg,
Dwarf_Half value);
DESCRIPTION
These functions set the parameters of the internal register rule table.
Argument
dbg should reference a DWARF debug context
allocated using
dwarf_init(3).
Argument
value should hold the parameter value to set.
Function
dwarf_set_frame_cfa_value() sets the column number
for the CFA register rule in the internal register rule table. The constant
DW_FRAME_CFA_COL
is the default CFA register column
number for DWARF2-only interfaces, and the constant
DW_FRAME_CFA_COL3
is the default CFA column number for
DWARF3-compatible interfaces.
Function
dwarf_set_frame_rule_initial_value() sets the initial
value of the register rules in the internal register rule table. The default
initial value is the constant
DW_FRAME_REG_INITIAL_VALUE
, defined in the header file
<libdwarf.h>.
Function
dwarf_set_frame_rule_table_size() sets the maxmium
number of columns of the internal register rule table. Argument
value should be at least as large as the number of real
registers in the ABI.
Function
dwarf_set_frame_same_value() sets the register number
representing the “same value” register rule. The default register
number for the “same value” rule is the constant
DW_FRAME_SAME_VAL
, defined in the header file
<libdwarf.h>.
Function
dwarf_set_frame_undefined_value() sets the register
number representing the “undefined” register rule. The default
register number for the “undefined” rule is the constant
DW_FRAME_UNDEFINED_VAL
, defined in the header file
<libdwarf.h>.
RETURN VALUES
These functions return the previous value of the parameter being set.
SEE ALSO
dwarf(3),
dwarf_get_fde_at_pc(3),
dwarf_get_fde_info_for_all_regs(3),
dwarf_get_fde_info_for_all_regs3(3),
dwarf_get_fde_info_for_cfa_reg3(3),
dwarf_get_fde_info_for_reg(3),
dwarf_get_fde_info_for_reg3(3),
dwarf_get_fde_n(3)