kallsyms.c
1.03 KB
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/*
* Helper functions for working with the builtin symbol table
*
* Copyright (c) 2008-2009 Analog Devices Inc.
* Licensed under the GPL-2 or later.
*/
#include <common.h>
/* We need the weak marking as this symbol is provided specially */
extern const char system_map[] __attribute__((weak));
/* Given an address, return a pointer to the symbol name and store
* the base address in caddr. So if the symbol map had an entry:
* 03fb9b7c_spi_cs_deactivate
* Then the following call:
* unsigned long base;
* const char *sym = symbol_lookup(0x03fb9b80, &base);
* Would end up setting the variables like so:
* base = 0x03fb9b7c;
* sym = "_spi_cs_deactivate";
*/
const char *symbol_lookup(unsigned long addr, unsigned long *caddr)
{
const char *sym, *csym;
char *esym;
unsigned long sym_addr;
sym = system_map;
csym = NULL;
*caddr = 0;
while (*sym) {
sym_addr = simple_strtoul(sym, &esym, 16);
sym = esym;
if (sym_addr > addr)
break;
*caddr = sym_addr;
csym = sym;
sym += strlen(sym) + 1;
}
return csym;
}