DWARF_GET_FDE_AT_PC(3) | Library Functions Manual | DWARF_GET_FDE_AT_PC(3)

# NAME

`dwarf_get_fde_at_pc` —
retrieve the FDE descriptor for an address

# LIBRARY

DWARF Access Library (libdwarf, -ldwarf)

# SYNOPSIS

`#include <libdwarf.h>`

int
`dwarf_get_fde_at_pc`(Dwarf_Fde *fdelist, Dwarf_Addr pc, Dwarf_Fde *ret_fde, Dwarf_Addr *lopc, Dwarf_Addr *hipc, Dwarf_Error *err);

# DESCRIPTION

Function `dwarf_get_fde_at_pc`() searches the provided array of DWARF FDE descriptors for a descriptor covering a given program counter address.

Argument fdelist should point to an array of FDE descriptors, as returned by the functions dwarf_get_fde_list(3) or dwarf_get_fde_list_eh(3).

Argument pc should contain the program counter address being looked up.

Argument ret_fde should point to a location that will hold the returned FDE descriptor.

Argument lopc should point to a location that will be set to the lowest address covered by the returned FDE descriptor.

Argument hipc should point to a location that will be set to the highest address covered by the returned FDE descriptor.

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

# RETURN VALUES

Function `dwarf_get_fde_at_pc`() returns `DW_DLV_OK` when it succeeds. It returns `DW_DLV_NO_ENTRY` if a FDE descriptor that covers the address specified by argument pc is not found. In case of an error, it returns `DW_DLV_ERROR` and sets the argument err.

# ERRORS

Function `dwarf_get_fde_at_pc`() can fail with:

[`DW_DLE_ARGUMENT`]
  One of the arguments fdelist, ret_fde, lopc, or hipc was NULL.
[`DW_DLE_NO_ENTRY`]
  These was no FDE descriptor covering the address specified by argument pc.

# SEE ALSO

dwarf(3), dwarf_get_cie_of_fde(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_instr_bytes(3), dwarf_get_fde_list(3), dwarf_get_fde_list_eh(3), dwarf_get_fde_n(3), dwarf_get_fde_range(3)

May 22, 2011 | NetBSD 9.3