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 */ 11 extern 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 */ 23 const 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 } 45