mirror of
https://source.denx.de/u-boot/u-boot.git
synced 2025-11-03 01:41:44 +01:00
ecb1dc8922
The kernel stores address<->symbol names in it so things can be decoded at runtime. Do it in U-Boot, and we get nice symbol decoding when crashing. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
45 lines
1.0 KiB
C
45 lines
1.0 KiB
C
/*
|
|
* 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;
|
|
}
|