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dwarf_get_loclist_entry(3) [freebsd man page]

DWARF_GET_LOCLIST_ENTRY(3)				   BSD Library Functions Manual 				DWARF_GET_LOCLIST_ENTRY(3)

NAME
dwarf_get_loclist_entry -- retrieve DWARF location list entry LIBRARY
DWARF Access Library (libdwarf, -ldwarf) SYNOPSIS
#include <libdwarf.h> int dwarf_get_loclist_entry(Dwarf_Debug dbg, Dwarf_Unsigned offset, Dwarf_Addr *hipc, Dwarf_Addr *lopc, Dwarf_Ptr *data, Dwarf_Unsigned *entry_len, Dwarf_Unsigned *next_entry, Dwarf_Error *err); DESCRIPTION
Function dwarf_get_loclist_entry() retrieves a location list entry from the DWARF section ``.debug_loc''. Argument dbg should reference a DWARF debug context allocated using dwarf_init(3). Argument offset is an offset, relative to the ``.debug_loc'' section, to the start of the desired location list entry. Argument hipc should point to a location which will hold the offset, relative to the base address of the location list entry, of the highest program counter value for the entry. Argument lowpc should point to a location which will hold the offset, relative to the base address of the location list entry, of the lowest program counter value for the entry. Argument data should point to a location which will be set to a pointer to the location list data. Argument entry_len should point to a location which will hold the length in bytes of the location list data returned in argument data. Argument next_entry should point to a location which will hold the offset of the next location list entry. If argument err is not NULL, it will be used to store error information in case of an error. RETURN VALUES
Function dwarf_get_loclist_entry() returns DW_DLV_OK when it succeeds. It returns DW_DLV_NO_ENTRY if there is no location list at the speci- fied offset offset. In case of an error, it returns DW_DLV_ERROR and sets the argument err. ERRORS
Function dwarf_get_loclist_entry() can fail with: [DW_DLE_ARGUMENT] One of the arguments dbg, hipc, lopc, data, entry_len or next_entry was NULL. [DW_DLE_NO_ENTRY] There is no location list at the specified offset offset. EXAMPLE
To iterate through all the location list entries in the ``.debug_loc'' section, use: Dwarf_Debug dbg; Dwarf_Unsigned off, len, next; Dwarf_Addr hipc, lopc; Dwarf_Ptr data; Dwarf_Error de; int ret; off = 0; while ((ret = dwarf_get_loclist_entry(dbg, off, &hipc, &lopc, &data, &len, &next, &de)) == DW_DLV_OK) { /* ... use loclist entry ... */ off = next; } if (ret == DW_DLV_ERROR) warnx("dwarf_get_loclist_entry failed: %s", dwarf_errmsg(de)); SEE ALSO
dwarf(3), dwarf_loclist(3), dwarf_loclist_n(3), dwarf_loclist_from_expr(3), dwarf_loclist_from_expr_a(3) BSD
July 6, 2011 BSD

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DWARF_GET_FDE_AT_PC(3)					   BSD 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) BSD
May 22, 2011 BSD
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