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>master
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/*
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* Helper functions for working with the builtin symbol table |
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* |
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* Copyright (c) 2008-2009 Analog Devices Inc. |
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* Licensed under the GPL-2 or later. |
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*/ |
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#include <common.h> |
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/* We need the weak marking as this symbol is provided specially */ |
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extern const char system_map[] __attribute__((weak)); |
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/* Given an address, return a pointer to the symbol name and store
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* the base address in caddr. So if the symbol map had an entry: |
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* 03fb9b7c_spi_cs_deactivate |
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* Then the following call: |
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* unsigned long base; |
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* const char *sym = symbol_lookup(0x03fb9b80, &base); |
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* Would end up setting the variables like so: |
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* base = 0x03fb9b7c; |
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* sym = "_spi_cs_deactivate"; |
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*/ |
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const char *symbol_lookup(unsigned long addr, unsigned long *caddr) |
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{ |
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const char *sym, *csym; |
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char *esym; |
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unsigned long sym_addr; |
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sym = system_map; |
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csym = NULL; |
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*caddr = 0; |
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while (*sym) { |
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sym_addr = simple_strtoul(sym, &esym, 16); |
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sym = esym; |
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if (sym_addr > addr) |
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break; |
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*caddr = sym_addr; |
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csym = sym; |
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sym += strlen(sym) + 1; |
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} |
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return csym; |
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} |
@ -0,0 +1,8 @@ |
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/*
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* The builtin symbol table for use with kallsyms |
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* |
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* Copyright (c) 2008-2009 Analog Devices Inc. |
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* Licensed under the GPL-2 or later. |
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*/ |
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const char const system_map[] = SYSTEM_MAP; |
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/* |
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* system_map.S - optional symbol lookup for debugging |
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* |
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* Copyright (c) 2007 Analog Devices Inc. |
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* Licensed under the GPL-2 or later. |
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*/ |
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#include <config.h> |
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#ifdef CONFIG_DEBUG_DUMP_SYMS |
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.data |
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.global _system_map
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.type _system_map,@object
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_system_map: |
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#include SYM_FILE |
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.asciz "" |
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.size _system_map,.-_system_map |
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#endif |
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