blob: ce42a932bb85972394ab32e3048828753ab49107 [file] [log] [blame]
Mike Frysingerecb1dc82009-05-20 04:35:14 -04001/*
2 * Helper functions for working with the builtin symbol table
3 *
4 * Copyright (c) 2008-2009 Analog Devices Inc.
5 * Licensed under the GPL-2 or later.
6 */
7
8#include <common.h>
9
10/* We need the weak marking as this symbol is provided specially */
11extern const char system_map[] __attribute__((weak));
12
13/* Given an address, return a pointer to the symbol name and store
14 * the base address in caddr. So if the symbol map had an entry:
15 * 03fb9b7c_spi_cs_deactivate
16 * Then the following call:
17 * unsigned long base;
18 * const char *sym = symbol_lookup(0x03fb9b80, &base);
19 * Would end up setting the variables like so:
20 * base = 0x03fb9b7c;
21 * sym = "_spi_cs_deactivate";
22 */
23const char *symbol_lookup(unsigned long addr, unsigned long *caddr)
24{
25 const char *sym, *csym;
26 char *esym;
27 unsigned long sym_addr;
28
29 sym = system_map;
30 csym = NULL;
31 *caddr = 0;
32
33 while (*sym) {
34 sym_addr = simple_strtoul(sym, &esym, 16);
35 sym = esym;
36 if (sym_addr > addr)
37 break;
38 *caddr = sym_addr;
39 csym = sym;
40 sym += strlen(sym) + 1;
41 }
42
43 return csym;
44}