Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

dwarf_get_arange_info(3) [freebsd man page]

DWARF_GET_ARANGE_INFO(3)				   BSD Library Functions Manual 				  DWARF_GET_ARANGE_INFO(3)

NAME
dwarf_get_arange_info -- extract address range information from a descriptor LIBRARY
DWARF Access Library (libdwarf, -ldwarf) SYNOPSIS
#include <libdwarf.h> int dwarf_get_arange_info(Dwarf_Arange ar, Dwarf_Addr *start, Dwarf_Unsigned *length, Dwarf_Off *cu_die_offset, Dwarf_Error *err); DESCRIPTION
Function dwarf_get_arange_info() extracts address range information from a Dwarf_Arange descriptor. Argument ar should reference a valid Dwarf_Arange descriptor returned by function dwarf_get_aranges(3). Argument start should point to a location which will hold the start value of the address range associated with the descriptor. Argument length should point to a location which will hold the length in bytes of the address range associated with the descriptor. Argument cu_die_offset should point to a location which will be set to an offset, relative to the ``.debug_info'' section, of the first debugging information entry in the compilation unit associated with argument ar. If argument err is not NULL, it will be used to store error information in case of an error. RETURN VALUES
Function dwarf_get_arange_info() 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_arange_info() can fail with: [DW_DLE_ARGUMENT] One of the arguments ar, start, length or cu_die_offset was NULL. EXAMPLE
To loop through all the address lookup table entries, use: Dwarf_Debug dbg; Dwarf_Addr start; Dwarf_Arange *aranges; Dwarf_Off die_off; Dwarf_Signed i, cnt; Dwarf_Unsigned length; Dwarf_Error de; if (dwarf_get_aranges(dbg, &aranges, &cnt, &de) != DW_DLV_OK) errx(EXIT_FAILURE, "dwarf_get_aranges: %s", dwarf_errmsg(de)); for (i = 0; i < cnt; i++) { if (dwarf_get_arange_info(aranges[i], &start, &length, &die_off, &de) != DW_DLV_OK) { warnx("dwarf_get_arange_info: %s", dwarf_errmsg(de)); continue; } /* Do something with the returned information. */ } SEE ALSO
dwarf(3), dwarf_get_arange(3), dwarf_get_aranges(3), dwarf_get_arange_cu_header_offset(3), dwarf_get_cu_die_offset(3) BSD
April 16, 2011 BSD

Check Out this Related Man Page

DWARF_GET_STR(3)					   BSD Library Functions Manual 					  DWARF_GET_STR(3)

NAME
dwarf_get_str -- retrieve a string from the DWARF string section LIBRARY
DWARF Access Library (libdwarf, -ldwarf) SYNOPSIS
#include <libdwarf.h> int dwarf_get_str(Dwarf_Debug dbg, Dwarf_Off offset, char **string, Dwarf_Signed *len, Dwarf_Error *err); DESCRIPTION
Function dwarf_get_str() retrieves a NUL-terminated string from the DWARF string section ``.debug_str''. Argument dbg should reference a DWARF debug context allocated using dwarf_init(3). Argument offset should be an offset, relative to the ``.debug_str'' section, specifying the start of the desired string. Argument string should point to a location which will hold a returned pointer to a NUL-terminated string. Argument len should point to a location which will hold the length of the returned string. The returned length does not include the space needed for the NUL-terminator. If argument err is not NULL, it will be used to store error information in case of an error. RETURN VALUES
Function dwarf_get_str() returns DW_DLV_OK when it succeeds. It returns DW_DLV_NO_ENTRY if there is no ``.debug_str'' section associated with the specified debugging context, or if the provided offset offset is at the very end of ``.debug_str'' section. In case of an error, it returns DW_DLV_ERROR and sets the argument err. ERRORS
Function dwarf_get_str() can fail with: [DW_DLE_ARGUMENT] One of the arguments dbg, string or len was NULL. [DW_DLE_ARGUMENT] Argument offset was out of range. [DW_DLE_NO_ENTRY] The debugging context dbg did not contain a ``.debug_str'' string section. [DW_DLE_NO_ENTRY] Argument offset was at the very end of the ``.debug_str'' section. EXAMPLE
To retrieve all the strings in the DWARF string section, use: Dwarf_Debug dbg; Dwarf_Off offset; Dwarf_Signed len; Dwarf_Error de; char *str; int ret offset = 0; while ((ret = dwarf_get_str(dbg, offset, &str, &len, &de)) == DW_DLV_OK) { /* .. Use the retrieved string. .. */ offset += len + 1; /* Account for the terminating NUL. */ } if (ret == DW_DLV_ERROR) warnx("dwarf_get_str: %s", dwarf_errmsg(de)); SEE ALSO
dwarf(3), dwarf_init(3) BSD
April 3, 2011 BSD
Man Page