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dwarf_set_frame_same_value(3) [freebsd man page]

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

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

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dwarf_get_fde_info_for_all_regs -- retrieve register rule row LIBRARY
DWARF Access Library (libdwarf, -ldwarf) SYNOPSIS
#include <libdwarf.h> int dwarf_get_fde_info_for_all_regs(Dwarf_Fde fde, Dwarf_Addr pc, Dwarf_Regtable *reg_table, Dwarf_Addr *row_pc, Dwarf_Error *err); DESCRIPTION
Function dwarf_get_fde_info_for_all_regs() retrieves a row from the register rule table associated with the given FDE descriptor. Argument fde should reference a valid DWARF FDE descriptor. Argument pc should hold the program counter address to be used to locate the desired table row. Argument reg_table should point to a Dwarf_Regtable descriptor which will hold the returned table row of register rules. Argument row_pc should point to a location which will be set to the lowest program counter address associated with the table row. If argument err is not NULL, it will be used to store error information in case of an error. The Dwarf_Regtable descriptor is defined in the header file <libdwarf.h>: typedef struct { struct { Dwarf_Small dw_offset_relevant; Dwarf_Half dw_regnum; Dwarf_Addr dw_offset; } rules[DW_REG_TABLE_SIZE]; } Dwarf_Regtable; For each of the register rules returned, the dw_offset_relevant field is set to 1 if the register rule has a offset value. The dw_regnum field is set to the register number associated with the regsiter rule. The dw_offset field is set to the offset value associated with the register rule. The number of register columns returned is either the constant value DW_REG_TABLE_SIZE as defined in the header file <libdwarf.h>, or the value set by function dwarf_set_frame_rule_table_size(3), whichever is smaller. COMPATIBILITY Function dwarf_get_fde_info_for_all_regs() is deprecated since it only supports DWARF2 frame sections. Applications should instead use func- tion dwarf_get_fde_info_for_all_regs3(3) which supports both DWARF2 and DWARF3 frame sections. RETURN VALUES
Function dwarf_get_fde_info_for_all_regs() 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_all_regs() can fail with: [DW_DLE_ARGUMENT] One of the arguments fde, reg_table or row_pc was NULL. [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_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), 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
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