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Ksplice: Add functions for walking kallsyms symbols

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Impact: New API

kallsyms_lookup_name only returns the first match that it finds.  Ksplice
needs information about all symbols with a given name in order to correctly
resolve local symbols.

kallsyms_on_each_symbol provides a generic mechanism for iterating over the
kallsyms table.

Cc: Jeff Arnold <[email protected]>
Cc: Tim Abbott <[email protected]>
Signed-off-by: Anders Kaseorg <[email protected]>
Signed-off-by: Rusty Russell <[email protected]>
This commit is contained in:
Anders Kaseorg 2008-12-05 19:03:58 -05:00 • committed by Rusty Russell
commit 75a66614db
4 changed files with 65 additions and 0 deletions
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19
kernel/kallsyms.c
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@ -161,6 +161,25 @@ unsigned long kallsyms_lookup_name(const char *name)
return module_kallsyms_lookup_name(name);
}
int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *,
unsigned long),
void *data)
{
char namebuf[KSYM_NAME_LEN];
unsigned long i;
unsigned int off;
int ret;
for (i = 0, off = 0; i < kallsyms_num_syms; i++) {
off = kallsyms_expand_symbol(off, namebuf);
ret = fn(data, namebuf, NULL, kallsyms_addresses[i]);
if (ret != 0)
return ret;
}
return module_kallsyms_on_each_symbol(fn, data);
}
EXPORT_SYMBOL_GPL(kallsyms_on_each_symbol);
static unsigned long get_symbol_pos(unsigned long addr,
unsigned long *symbolsize,
unsigned long *offset)