dwarf_set_frame_undefined_value(3) [freebsd man page]

DWARF_SET_FRAME_CFA_VALUE(3)				   BSD Library Functions Manual 			      DWARF_SET_FRAME_CFA_VALUE(3)

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 num-
     ber 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)

BSD
								   June 18, 2011							       BSD

DWARF_GET_FDE_INFO_FOR_REG(3)				   BSD Library Functions Manual 			     DWARF_GET_FDE_INFO_FOR_REG(3)

NAME

     dwarf_get_fde_info_for_reg -- retrieve register rule

LIBRARY

     DWARF Access Library (libdwarf, -ldwarf)

SYNOPSIS

     #include <libdwarf.h>

     int
     dwarf_get_fde_info_for_reg(Dwarf_Fde fde, Dwarf_Half table_column, Dwarf_Addr pc, Dwarf_Signed *offset_relevant, Dwarf_Signed *register_num,
	 Dwarf_Signed *offset, Dwarf_Addr *row_pc, Dwarf_Error *error);

DESCRIPTION

     Function dwarf_get_fde_info_for_reg() retrieves a register rule from the register rule table associated with a given FDE descriptor, given a
     program counter address and rule column number.

     Argument fde should reference a valid DWARF FDE descriptor.

     Arugment table_column should hold the column number of the register rule desired.

     Argument pc should hold the program counter address to be used to locate the desired register rule row.

     On successful execution, dwarf_get_fde_info_for_reg() stores information about the register rule found into the locations pointed to by the
     arguments offset_relevant, register_num, offset and row_pc.

     If there is an offset value associated with the register rule, the location pointed to by argument offset_relevant will be set to 1.

     Argument register_num should point to a location which will hold the register number associated with the register rule.

     Argument offset should point to a location which will be set to the offset value associated with the register rule, or to 0 if the register
     rule does not have an offset value.

     Argument row_pc should point to a location which will be set to the lowest program counter address associated with the register rule found.

     If argument err is not NULL, it will be used to return an error descriptor in case of an error.

   COMPATIBILITY
     Function dwarf_get_fde_info_for_reg() is deprecated since it only supports DWARF2 frame sections.	Applications should instead use function
     dwarf_get_fde_info_for_reg3(3) which supports both DWARF2 and DWARF3 frame sections.

RETURN VALUES

     Function dwarf_get_fde_info_for_reg() returns DW_DLV_OK when it succeeds.	In case of an error, it returns DW_DLV_ERROR and sets the argument
     err.

ERRORS

     Function dwarf_get_fde_info_for_reg() can fail with:

     [DW_DLE_ARGUMENT]		   One of the arguments fde, offset_relevant, register_num, offset or row_pc was NULL.

     [DW_DLE_FRAME_TABLE_COL_BAD]  The column number provided in argument table_column was too large.

     [DW_DLE_PC_NOT_IN_FDE_RANGE]  The program counter value provided in argument pc did not fall in the range covered by argument fde.

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_reg3(3), dwarf_get_fde_n(3), dwarf_set_frame_cfa_value(3),
     dwarf_set_frame_rule_table_size(3), dwarf_set_frame_rule_initial_value(3), dwarf_set_frame_same_value(3), dwarf_set_frame_undefined_value(3)

BSD
								   June 4, 2011 							       BSD