LXR uboot/common/kallsyms.c

   1/*
   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 = hextoul(sym, &esym);
  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}
  45