DWARF_LOCLIST(3) | Library Functions Manual | DWARF_LOCLIST(3) |
int
dwarf_loclist(Dwarf_Attribute at, Dwarf_Locdesc **llbuf, Dwarf_Signed *listlen, Dwarf_Error *error);
int
dwarf_loclist_n(Dwarf_Attribute at, Dwarf_Locdesc ***llbuf, Dwarf_Signed *listlen, Dwarf_Error *error);
Note: function dwarf_loclist() is deprecated. New application code should instead use function dwarf_loclist_n()
Function dwarf_loclist_n() retrieves the list of location expressions associated with a DWARF attribute. Argument at should reference a valid DWARF attribute. Argument llbuf should point to a location which will hold a returned array of pointers to Dwarf_Locdesc descriptors. Argument listlen should point to a location which will be set to the number of elements contained in the returned array. If argument err is not NULL, it will be used to store error information in case of an error.
Function dwarf_loclist() retrieves the first location expression associated with an attribute. Argument at should reference a valid DWARF attribute. Argument llbuf should point to a location which will hold the returned pointer to a Dwarf_Locdesc descriptor. Argument listlen should point to a location which will be always set to 1. If argument err is not NULL, it will be used to store error information in case of an error.
Dwarf_Locdesc descriptors are defined in the header file <libdwarf.h>, and consist of following fields:
Each Dwarf_Loc descriptor represents one operation of a location expression. These descriptors are defined in the header file <libdwarf.h>, and consist of following fields:
Dwarf_Attribute at; Dwarf_Locdesc **llbuf; Dwarf_Signed lcnt; Dwarf_Loc *lr; Dwarf_Error de; int i; if (dwarf_loclist_n(at, &llbuf, &lcnt, &de) != DW_DLV_OK) errx(EXIT_FAILURE, "dwarf_loclist_n failed: %s", dwarf_errmsg(de)); for (i = 0; i < lcnt; i++) { /* ... Use llbuf[i] ... */ for (j = 0; (Dwarf_Half) j < llbuf[i]->ld_cents; j++) { lr = &llbuf[i]->ld_s[j]; /* ... Use each Dwarf_Loc descriptor ... */ } dwarf_dealloc(dbg, llbuf[i]->ld_s, DW_DLA_LOC_BLOCK); dwarf_dealloc(dbg, llbuf[i], DW_DLA_LOCDESC); } dwarf_dealloc(dbg, llbuf, DW_DLA_LIST);
November 9, 2011 | NetBSD 7.2 |