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From: Felix Fietkau <nbd@nbd.name>
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Subject: kernel: when KALLSYMS is disabled, print module address + size for matching backtrace entries
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[john@phrozen.org: felix will add this to his upstream queue]
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lede-commit 53827cdc824556cda910b23ce5030c363b8f1461
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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lib/vsprintf.c | 15 +++++++++++----
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1 file changed, 11 insertions(+), 4 deletions(-)
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--- a/lib/vsprintf.c
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+++ b/lib/vsprintf.c
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@@ -669,8 +669,10 @@ char *symbol_string(char *buf, char *end
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struct printf_spec spec, const char *fmt)
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{
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unsigned long value;
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-#ifdef CONFIG_KALLSYMS
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char sym[KSYM_SYMBOL_LEN];
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+#ifndef CONFIG_KALLSYMS
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+ struct module *mod;
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+ int len;
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#endif
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if (fmt[1] == 'R')
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@@ -684,11 +686,16 @@ char *symbol_string(char *buf, char *end
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sprint_symbol(sym, value);
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else
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sprint_symbol_no_offset(sym, value);
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-
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- return string(buf, end, sym, spec);
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#else
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- return special_hex_number(buf, end, value, sizeof(void *));
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+ len = snprintf(sym, sizeof(sym), "0x%lx", value);
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+
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+ mod = __module_address(value);
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+ if (mod)
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+ snprintf(sym + len, sizeof(sym) - len, " [%s@%p+0x%x]",
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+ mod->name, mod->core_layout.base,
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+ mod->core_layout.size);
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#endif
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+ return string(buf, end, sym, spec);
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}
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static noinline_for_stack
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